chore(version): bump 4.16.0 to 4.16.1

Closes #256

fix(tests): update tests and fix

chore(lib): simplify fix and more tests

chore(docs): document patch

.bumpversion.cfg

@@ -0,0 +1,16 @@
+[bumpversion]
+current_version = 4.16.1
+commit = True
+message = chore(version): bump {current_version} to {new_version}
+
+[bumpversion:file:manim_slides/__version__.py]
+search = __version__ = "{current_version}"
+replace = __version__ = "{new_version}"
+
+[bumpversion:file:pyproject.toml]
+search = version = "{current_version}"
+replace = version = "{new_version}"
+
+[bumpversion:file:CITATION.cff]
+search = version: v{current_version}
+replace = version: v{new_version}

.flake8

@@ -1,5 +0,0 @@
-[flake8]
-min_python_version = 3.7
-extend-ignore =
-    # E501: line too long
-    E501,

.github/ISSUE_TEMPLATE/bug.yml

@@ -1,40 +1,40 @@
 name: Bug
 description: Report an issue to help improve the project.
-labels: "bug"
+labels: bug
 title: '[BUG] <description>'
 body:
-  - type: textarea
-    id: description
-    attributes:
-      label: Description
-      description: A brief description of the question or issue, also include what you tried and what didn't work
-    validations:
-      required: true
-  - type: textarea
-    id: version
-    attributes:
-      label: Version
-      description: Which version of Manim Slides are you using? You can use `manim-slides --version` to get that information.
-    validations:
-      required: true
-  - type: textarea
-    id: platform
-    attributes:
-      label: Platform
-      description: What is your platform. Linux, macOS, or Windows?
-    validations:
-      required: true
-  - type: textarea
-    id: screenshots
-    attributes:
-      label: Screenshots
-      description: Please add screenshots if applicable
-    validations:
-      required: false
-  - type: textarea
-    id: extrainfo
-    attributes:
-      label: Additional information
-      description: Is there anything else we should know about this bug?
-    validations:
-      required: false
+- type: textarea
+  id: description
+  attributes:
+    label: Description
+    description: A brief description of the question or issue, also include what you tried and what didn't work
+  validations:
+    required: true
+- type: textarea
+  id: version
+  attributes:
+    label: Version
+    description: Which version of Manim Slides are you using? You can use `manim-slides --version` to get that information.
+  validations:
+    required: true
+- type: textarea
+  id: platform
+  attributes:
+    label: Platform
+    description: What is your platform. Linux, macOS, or Windows?
+  validations:
+    required: true
+- type: textarea
+  id: screenshots
+  attributes:
+    label: Screenshots
+    description: Please add screenshots if applicable
+  validations:
+    required: false
+- type: textarea
+  id: extrainfo
+  attributes:
+    label: Additional information
+    description: Is there anything else we should know about this bug?
+  validations:
+    required: false

.github/ISSUE_TEMPLATE/documentation.yml

@@ -1,59 +1,59 @@
 name: Documentation
 description: Ask / Report an issue related to the documentation.
-title: "DOC: <description>"
-labels: ['bug', 'docs']
+title: 'DOC: <description>'
+labels: [bug, docs]
 
 body:
-  - type: markdown
-    attributes:
-      value: >
-        **Thank you for wanting to report a problem with manim-slides docs!**
+- type: markdown
+  attributes:
+    value: >
+      **Thank you for wanting to report a problem with manim-slides docs!**
 
 
-        If the problem seems straightforward, feel free to submit a PR instead!
+      If the problem seems straightforward, feel free to submit a PR instead!
 
 
-        ⚠
-        Verify first that your issue is not already reported on GitHub [Issues].
+      ⚠
+      Verify first that your issue is not already reported on GitHub [Issues].
 
 
-        [Issues]:
-        https://github.com/jeertmans/manim-slides/issues
+      [Issues]:
+      https://github.com/jeertmans/manim-slides/issues
 
-  - type: textarea
-    attributes:
-      label: Describe the Issue
-      description: A clear and concise description of the issue you encountered.
-    validations:
-      required: true
+- type: textarea
+  attributes:
+    label: Describe the Issue
+    description: A clear and concise description of the issue you encountered.
+  validations:
+    required: true
 
-  - type: input
-    attributes:
-      label: Affected Page
-      description: Add a link to page with the problem.
-    validations:
-      required: true
+- type: input
+  attributes:
+    label: Affected Page
+    description: Add a link to page with the problem.
+  validations:
+    required: true
 
-  - type: dropdown
-    attributes:
-      label: Issue Type
-      description: >
-        Please select the option in the drop-down.
+- type: dropdown
+  attributes:
+    label: Issue Type
+    description: >
+      Please select the option in the drop-down.
 
-        <details>
-          <summary>
-            <em>Issue?</em>
-          </summary>
-        </details>
-      options:
-        - Documentation Enhancement
-        - Documentation Report
-    validations:
-      required: true
+      <details>
+        <summary>
+          <em>Issue?</em>
+        </summary>
+      </details>
+    options:
+    - Documentation Enhancement
+    - Documentation Report
+  validations:
+    required: true
 
-  - type: textarea
-    attributes:
-      label: Recommended fix or suggestions
-      description: A clear and concise description of how you want to update it.
-    validations:
-      required: false
+- type: textarea
+  attributes:
+    label: Recommended fix or suggestions
+    description: A clear and concise description of how you want to update it.
+  validations:
+    required: false

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -1,26 +1,26 @@
 name: Feature Request
 description: Have a new idea/feature? Please suggest!
-labels: "enhancement"
+labels: enhancement
 title: '[FEATURE] <description>'
 body:
-  - type: textarea
-    id: description
-    attributes:
-      label: Description
-      description: A brief description of the enhancement you propose, also include what you tried and what worked.
-    validations:
-      required: true
-  - type: textarea
-    id: screenshots
-    attributes:
-      label: Screenshots
-      description: Please add screenshots if applicable
-    validations:
-      required: false
-  - type: textarea
-    id: extrainfo
-    attributes:
-      label: Additional information
-      description: Is there anything else we should know about this idea?
-    validations:
-      required: false
+- type: textarea
+  id: description
+  attributes:
+    label: Description
+    description: A brief description of the enhancement you propose, also include what you tried and what worked.
+  validations:
+    required: true
+- type: textarea
+  id: screenshots
+  attributes:
+    label: Screenshots
+    description: Please add screenshots if applicable
+  validations:
+    required: false
+- type: textarea
+  id: extrainfo
+  attributes:
+    label: Additional information
+    description: Is there anything else we should know about this idea?
+  validations:
+    required: false

.github/ISSUE_TEMPLATE/support.yml

@@ -1,14 +1,14 @@
 name: Question/Help/Support
 description: Ask us about Manim Slides
-title: "Support: Ask us anything"
-labels: ['help', 'question']
+title: 'Support: Ask us anything'
+labels: [help, question]
 
 body:
-  - type: textarea
-    attributes:
-      label: "Please explain the issue you're experiencing (with as much detail as possible):"
-      description: >
-        Please make sure to leave a reference to the document/code you're
-        referring to.
-    validations:
-      required: true
+- type: textarea
+  attributes:
+    label: "Please explain the issue you're experiencing (with as much detail as possible):"
+    description: >
+      Please make sure to leave a reference to the document/code you're
+      referring to.
+  validations:
+    required: true

.github/dependabot.yml

@@ -0,0 +1,13 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+- package-ecosystem: github-actions
+  directory: /
+  schedule:
+    interval: daily
+  labels:
+  - dependencies

.github/workflows/clearcache.yml

@@ -0,0 +1,34 @@
+# From: https://docs.github.com/en/actions/using-workflows/caching-dependencies-to-speed-up-workflows#force-deleting-cache-entries
+name: Cleanup caches by a branch
+on:
+  pull_request:
+    types:
+    - closed
+
+jobs:
+  cleanup:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out code
+      uses: actions/checkout@v3
+
+    - name: Cleanup
+      run: |
+        gh extension install actions/gh-actions-cache
+
+        REPO=${{ github.repository }}
+        BRANCH="refs/pull/${{ github.event.pull_request.number }}/merge"
+
+        echo "Fetching list of cache key"
+        cacheKeysForPR=$(gh actions-cache list -R $REPO -B $BRANCH | cut -f 1 )
+
+        ## Setting this to not fail the workflow while deleting cache keys.
+        set +e
+        echo "Deleting caches..."
+        for cacheKey in $cacheKeysForPR
+        do
+            gh actions-cache delete $cacheKey -R $REPO -B $BRANCH --confirm
+        done
+        echo "Done"
+      env:
+        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/codeql-analysis.yml

@@ -9,16 +9,16 @@
 # the `language` matrix defined below to confirm you have the correct set of
 # supported CodeQL languages.
 #
-name: "CodeQL"
+name: CodeQL
 
 on:
   push:
-    branches: [ "main" ]
+    branches: [main]
   pull_request:
     # The branches below must be a subset of the branches above
-    branches: [ "main" ]
+    branches: [main]
   schedule:
-    - cron: '45 3 * * 2'
+  - cron: 45 3 * * 2
 
 jobs:
   analyze:
@@ -32,7 +32,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        language: [ 'python' ]
+        language: [python]
         # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
         # Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
 

.github/workflows/coverage.yml

@@ -0,0 +1,48 @@
+on: [push]
+
+name: Code Coverage
+
+jobs:
+  test:
+    name: Coverage
+    runs-on: ubuntu-latest
+    env:
+      QT_QPA_PLATFORM: offscreen
+      MANIM_SLIDES_VERBOSITY: debug
+      PYTHONFAULTHANDLER: 1
+      DISPLAY: :99
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+
+    - name: Install Poetry
+      run: pipx install poetry
+
+    - name: Install Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.11'
+        cache: poetry
+
+    - name: Install manim dependencies on Ubuntu
+      run: |
+        sudo apt-get install libcairo2-dev libpango1.0-dev ffmpeg freeglut3-dev
+
+    - name: Install xvfb on Ubuntu
+      run: |
+        sudo apt-get install xvfb
+        nohup Xvfb $DISPLAY &
+
+    - name: Install Manim Slides
+      run: |
+        poetry install --with test
+
+    - name: Run pytest and coverage
+      run: poetry run pytest --cov-report xml --cov=manim_slides tests/
+
+    - name: Upload to codecov.io
+      uses: codecov/codecov-action@v3
+      env:
+        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+      with:
+        fail_ci_if_error: true

.github/workflows/draft-pdf.yml

@@ -0,0 +1,33 @@
+# Simple workflow for deploying static content to GitHub Pages
+name: Create JOSE Paper
+
+on:
+  # Runs on pushes targeting the default branch
+  push:
+    paths:
+    - paper/*
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  paper:
+    runs-on: ubuntu-latest
+    name: Paper Draft
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+    - name: Build draft PDF
+      uses: openjournals/openjournals-draft-action@master
+      with:
+        journal: jose
+          # This should be the path to the paper within your repo.
+        paper-path: paper/paper.md
+    - name: Upload
+      uses: actions/upload-artifact@v3
+      with:
+        name: paper
+        # This is the output path where Pandoc will write the compiled
+        # PDF. Note, this should be the same directory as the input
+        # paper.md
+        path: paper/paper.pdf

.github/workflows/languagetool.yml

@@ -8,8 +8,8 @@ jobs:
   languagetool_check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
-      - uses: reviewdog/action-languagetool@v1
-        with:
-          reporter: github-pr-review
-          level: warning
+    - uses: actions/checkout@v3
+    - uses: reviewdog/action-languagetool@v1
+      with:
+        reporter: github-pr-review
+        level: warning

.github/workflows/pages.yml

@@ -4,7 +4,9 @@ name: Deploy static content to Pages
 on:
   # Runs on pushes targeting the default branch
   push:
-    branches: ["main"]
+    branches: [main]
+
+  pull_request:
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
@@ -17,42 +19,78 @@ permissions:
 
 # Allow one concurrent deployment
 concurrency:
-  group: "pages"
+  group: pages
   cancel-in-progress: true
 
 jobs:
   # Single deploy job since we're just deploying
   deploy:
+    permissions: write-all
     environment:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Install Python
-        uses: actions/setup-python@v4
-        with:
-          python-version: '3.10'
-      - name: Setup Pages
-        uses: actions/configure-pages@v2
-      - name: Install Linux Dependencies
-        run: sudo apt install libcairo2-dev libpango1.0-dev ffmpeg freeglut3-dev
-      - name: Install Python dependencies
-        run: pip install manim sphinx sphinx_click furo
-      - name: Install local Python package
-        run: pip install -e .
-      - name: Build animation and convert it into HTML slides
-        run: |
-          manim example.py ConvertExample
-          manim-slides convert ConvertExample docs/source/_static/slides.html -cembedded=true -ccontrols=true
-      - name: Build docs
-        run: cd docs && make html
-      - name: Upload artifact
-        uses: actions/upload-pages-artifact@v1
-        with:
-          # Upload docs/build/html dir
-          path: 'docs/build/html/'
-      - name: Deploy to GitHub Pages
-        id: deployment
-        uses: actions/deploy-pages@v1
+    - name: Checkout
+      uses: actions/checkout@v3
+    - name: Install Poetry
+      run: pipx install poetry
+    - name: Install Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.9'
+        cache: poetry
+    - name: Setup Pages
+      uses: actions/configure-pages@v3
+    - name: Install Linux Dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install libcairo2-dev libpango1.0-dev ffmpeg freeglut3-dev
+    - name: Setup Pandoc
+      uses: nikeee/setup-pandoc@v1
+    - name: Install local Python package
+      run: poetry install --with docs
+    - name: Install IPython kernel
+      run: poetry run ipython kernel install --name "manim-slides" --user
+    - name: Restore cached media
+      id: cache-media-restore
+      uses: actions/cache/restore@v3
+      with:
+        path: media
+        key: ${{ runner.os }}-media
+    - name: Build animations
+      run: |
+        poetry run manim example.py ConvertExample BasicExample ThreeDExample
+    - name: Convert animations to HTML slides
+      run: |
+        poetry run manim-slides convert -v DEBUG ConvertExample docs/source/_static/slides.html -ccontrols=true
+        poetry run manim-slides convert -v DEBUG BasicExample docs/source/_static/basic_example.html -ccontrols=true
+        poetry run manim-slides convert -v DEBUG ThreeDExample docs/source/_static/three_d_example.html -ccontrols=true
+    - name: Show docs/source/_static/ dir content (video only)
+      run: tree -L 3 docs/source/_static/ -P '*.mp4'
+    - name: Clear cache
+      run: |
+        gh extension install actions/gh-actions-cache
+        gh actions-cache delete ${{ steps.cache-media-restore.outputs.cache-primary-key }} --confirm || true
+      env:
+        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    - name: Save media to cache
+      id: cache-media-save
+      uses: actions/cache/save@v3
+      with:
+        path: media
+        key: ${{ steps.cache-media-restore.outputs.cache-primary-key }}
+    - name: Build docs
+      run: cd docs && poetry run make html
+    - name: Upload artifact
+      if: github.event_name != 'pull_request'
+      uses: actions/upload-pages-artifact@v2
+      with:
+        # Upload docs/build/html dir
+        path: docs/build/html/
+    - name: Show docs/build/html/_static/ dir content (video only)
+      run: tree -L 3 docs/build/html/_static/ -P '*.mp4'
+    - name: Deploy to GitHub Pages
+      id: deployment
+      if: github.event_name != 'pull_request'
+      uses: actions/deploy-pages@v2

.github/workflows/python-publish.yml

@@ -1,4 +1,3 @@
-# Modified from: https://github.com/pypa/cibuildwheel
 name: Upload Python Package
 
 on:
@@ -8,41 +7,28 @@ on:
     types: [published]
 
 jobs:
-  build_wheels:
-    name: Build wheels on ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest]
-
-    steps:
-      - uses: actions/checkout@v2
-
-      - uses: actions/setup-python@v2
-
-      - name: Install build package
-        run: python -m pip install -U build
-
-      - name: Build wheels
-        run: python -m build --sdist
-
-      - uses: actions/upload-artifact@v2
-        with:
-          name: dist
-          path: dist/*.tar.*
-
-  release:
-    name: Release
-    if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
+  build_and_release:
+    name: Build and release
     runs-on: ubuntu-latest
-    needs: [ build_wheels ]
+
     steps:
-      - uses: actions/download-artifact@v2
-        with:
-          name: dist
-          path: dist/
-      - name: Upload to PyPI
-        uses: pypa/gh-action-pypi-publish@master
-        with:
-          user: __token__
-          password: ${{ secrets.PYPI_API_TOKEN }}
+    - name: Checkout repository
+      uses: actions/checkout@v3
+
+    - name: Install Poetry
+      run: pipx install poetry
+
+    - name: Install Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.10'
+        cache: poetry
+
+    - name: Build wheels
+      run: poetry build
+
+    - name: Publish to PyPI
+      if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
+      env:
+        POETRY_PYPI_TOKEN_PYPI: ${{ secrets.PYPI_API_TOKEN }}
+      run: poetry publish

.github/workflows/test_examples.yml

@@ -1,117 +0,0 @@
-on:
-  pull_request:
-    paths:
-      - '**.py'
-      - '.github/workflows/test_examples.yml'
-  workflow_dispatch:
-
-name: Test Examples
-
-env:
-  QT_QPA_PLATFORM: offscreen
-  MANIM_SLIDES_VERBOSITY: debug
-  PYTHONFAULTHANDLER: 1
-  DISPLAY: ":99"
-
-jobs:
-  build-examples:
-    strategy:
-      fail-fast: false
-      matrix:
-        manim: [manim, manimgl]
-        os: [macos-latest, ubuntu-latest, windows-latest]
-        pyversion: ['3.8', '3.9', '3.10', '3.11']
-        exclude:
-        # excludes manimgl on Windows because if throws errors
-        # related to OpenGL, which seems hard to fix:
-        # Your graphics drivers do not support OpenGL 2.0.
-        - os: windows-latest
-          manim: manimgl
-        # We only test Python 3.11 on Windows and MacOS
-        - os: windows-latest
-          pyversion: '3.8'
-        - os: windows-latest
-          pyversion: '3.9'
-        - os: windows-latest
-          pyversion: '3.10'
-          manim: manim
-        - os: macos-latest
-          pyversion: '3.8'
-        - os: macos-latest
-          pyversion: '3.9'
-        - os: macos-latest
-          pyversion: '3.10'
-          manim: manim
-    runs-on: ${{ matrix.os }}
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v3
-      - name: Install Poetry
-        run: pipx install poetry
-      - name: Install Python
-        uses: actions/setup-python@v4
-        with:
-          python-version: ${{ matrix.pyversion }}
-          cache: 'poetry'
-
-      # Path related stuff
-      - name: Append to Path on MacOS
-        if: matrix.os == 'macos-latest'
-        run: |
-          echo "${HOME}/.local/bin" >> $GITHUB_PATH
-          echo "/Users/runner/Library/Python/${{ matrix.pyversion }}/bin" >> $GITHUB_PATH
-      - name: Append to Path on Ubuntu
-        if: matrix.os == 'ubuntu-latest'
-        run: echo "${HOME}/.local/bin" >> $GITHUB_PATH
-      - name: Append to Path on Windows
-        if: matrix.os == 'windows-latest'
-        run: echo "${HOME}/.local/bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
-
-      # OS depedencies
-      - name: Install manim dependencies on MacOs
-        if: matrix.os == 'macos-latest' && matrix.manim == 'manim'
-        run: brew install ffmpeg py3cairo
-      - name: Install manimgl dependencies on MacOS
-        if: matrix.os == 'macos-latest' && matrix.manim == 'manimgl'
-        run: brew install ffmpeg
-      - name: Install manim dependencies on Ubuntu
-        if: matrix.os == 'ubuntu-latest' && matrix.manim == 'manim'
-        run: |
-          sudo apt-get install libcairo2-dev libpango1.0-dev ffmpeg freeglut3-dev
-      - name: Install manimgl dependencies on Ubuntu
-        if: matrix.os == 'ubuntu-latest' && matrix.manim == 'manimgl'
-        run: |
-          sudo apt-get install libpango1.0-dev ffmpeg freeglut3-dev
-      - name: Install xvfb on Ubuntu
-        if: matrix.os == 'ubuntu-latest' && matrix.manim == 'manimgl'
-        run: |
-          sudo apt-get install xvfb
-          nohup Xvfb $DISPLAY &
-      - name: Install Windows dependencies
-        if: matrix.os == 'windows-latest'
-        run: choco install ffmpeg
-
-      # Install Manim Slides
-      - name: Install Manim Slides
-        run: |
-          poetry config experimental.new-installer false
-          poetry install
-
-      # Render slides
-      - name: Render slides
-        if: matrix.manim == 'manim'
-        run: poetry run manim -ql example.py Example ThreeDExample
-      - name: Render slides
-        if: matrix.manim == 'manimgl'
-        run: poetry run -v manimgl -l example.py Example ThreeDExample
-
-      # Play slides
-      - name: Test slides
-        run: poetry run manim-slides Example ThreeDExample --skip-all
-
-      # Test slides to html
-      - name: Test convert on Ubuntu
-        if: matrix.os == 'ubuntu-latest' && matrix.manim == 'manim'
-        run: |
-          poetry run manim -ql example.py ConvertExample
-          poetry run manim-slides convert --to=html ConvertExample index.html

.github/workflows/tests.yml

@@ -0,0 +1,169 @@
+on:
+  pull_request:
+  workflow_dispatch:
+
+name: Tests
+
+jobs:
+  pytest:
+    strategy:
+      fail-fast: false
+      matrix:
+        pyversion: ['3.8', '3.9', '3.10', '3.11']
+    runs-on: ubuntu-latest
+    env:
+      QT_QPA_PLATFORM: offscreen
+      MANIM_SLIDES_VERBOSITY: debug
+      PYTHONFAULTHANDLER: 1
+      DISPLAY: :99
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+
+    - name: Install Poetry
+      run: pipx install poetry
+
+    - name: Install Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.pyversion }}
+        cache: poetry
+
+    - name: Run apt-get update on Ubuntu
+      run: sudo apt-get update
+
+    - name: Install manim dependencies on Ubuntu
+      run: |
+        sudo apt-get install libcairo2-dev libpango1.0-dev ffmpeg freeglut3-dev
+
+    - name: Install xvfb on Ubuntu
+      run: |
+        sudo apt-get install xvfb
+        nohup Xvfb $DISPLAY &
+
+    - name: Install Manim Slides
+      run: |
+        poetry install --with test
+
+    - name: Run pytest
+      run: poetry run pytest -x
+
+  build-examples:
+    strategy:
+      fail-fast: false
+      matrix:
+        manim: [manim, manimgl]
+        os: [macos-latest, ubuntu-latest, windows-latest]
+        pyversion: ['3.8', '3.9', '3.10', '3.11']
+        exclude:
+        # excludes manimgl on Windows because if throws errors
+        # related to OpenGL, which seems hard to fix:
+        # Your graphics drivers do not support OpenGL 2.0.
+        - os: windows-latest
+          manim: manimgl
+        # We only test Python 3.11 on Windows and MacOS
+        - os: windows-latest
+          pyversion: '3.8'
+        - os: windows-latest
+          pyversion: '3.9'
+        - os: windows-latest
+          pyversion: '3.10'
+          manim: manim
+        - os: macos-latest
+          pyversion: '3.8'
+        - os: macos-latest
+          pyversion: '3.9'
+        - os: macos-latest
+          pyversion: '3.10'
+          manim: manim
+    runs-on: ${{ matrix.os }}
+    env:
+      QT_QPA_PLATFORM: offscreen
+      MANIM_SLIDES_VERBOSITY: debug
+      PYTHONFAULTHANDLER: 1
+      DISPLAY: :99
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+
+    - name: Install Poetry
+      run: pipx install poetry
+
+    - name: Install Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.pyversion }}
+        cache: poetry
+
+      # Path related stuff
+    - name: Append to Path on MacOS
+      if: matrix.os == 'macos-latest'
+      run: |
+        echo "${HOME}/.local/bin" >> $GITHUB_PATH
+        echo "/Users/runner/Library/Python/${{ matrix.pyversion }}/bin" >> $GITHUB_PATH
+
+    - name: Append to Path on Ubuntu
+      if: matrix.os == 'ubuntu-latest'
+      run: echo "${HOME}/.local/bin" >> $GITHUB_PATH
+
+    - name: Append to Path on Windows
+      if: matrix.os == 'windows-latest'
+      run: echo "${HOME}/.local/bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+
+      # OS depedencies
+    - name: Install manim dependencies on MacOs
+      if: matrix.os == 'macos-latest' && matrix.manim == 'manim'
+      run: brew install ffmpeg py3cairo
+
+    - name: Install manimgl dependencies on MacOS
+      if: matrix.os == 'macos-latest' && matrix.manim == 'manimgl'
+      run: brew install ffmpeg
+
+    - name: Run apt-get update on Ubuntu
+      if: matrix.os == 'ubuntu-latest'
+      run: sudo apt-get update
+
+    - name: Install manim dependencies on Ubuntu
+      if: matrix.os == 'ubuntu-latest' && matrix.manim == 'manim'
+      run: |
+        sudo apt-get install libcairo2-dev libpango1.0-dev ffmpeg freeglut3-dev
+
+    - name: Install manimgl dependencies on Ubuntu
+      if: matrix.os == 'ubuntu-latest' && matrix.manim == 'manimgl'
+      run: |
+        sudo apt-get install libpango1.0-dev ffmpeg freeglut3-dev
+
+    - name: Install xvfb on Ubuntu
+      if: matrix.os == 'ubuntu-latest' && matrix.manim == 'manimgl'
+      run: |
+        sudo apt-get install xvfb
+        nohup Xvfb $DISPLAY &
+
+    - name: Install Windows dependencies
+      if: matrix.os == 'windows-latest'
+      run: choco install ffmpeg
+
+      # Install Manim Slides
+    - name: Install Manim Slides
+      run: |
+        poetry install --extras ${{ matrix.manim }}
+
+    # Render slides
+    - name: Render slides
+      if: matrix.manim == 'manim'
+      run: poetry run manim -ql example.py BasicExample ThreeDExample
+
+    - name: Render slides
+      if: matrix.manim == 'manimgl'
+      run: poetry run -v manimgl -l example.py BasicExample ThreeDExample
+
+    # Play slides
+    - name: Test slides
+      run: poetry run manim-slides BasicExample ThreeDExample --skip-all
+
+    # Test slides to html
+    - name: Test convert on Ubuntu
+      if: matrix.os == 'ubuntu-latest' && matrix.manim == 'manim'
+      run: |
+        poetry run manim -ql example.py ConvertExample
+        poetry run manim-slides convert --to=html ConvertExample index.html

.gitignore

@@ -1,25 +1,46 @@
+# Python files
 __pycache__/
 /env
-/tests
 /build
 /dist
 *.egg-info/
 
+# Manim files
+images/
 /media
-/presentation
-
-/.vscode
-
-slides/
-
-.manim-slides.json
+docs/source/media/
 
+# ManimGL files
 videos/
 
-images/
+# Manim Slides files
+.manim-slides.toml
 
+slides/
+!tests/slides/
+
+slides_assets/
+
+# Docs
 docs/build/
 
-docs/source/_static/slides_assets/
+slides.html
 
-docs/source/_static/slides.html
+docs/source/reference/.ipynb_checkpoints/
+
+docs/source/_static/basic_example_assets/
+
+docs/source/_static/basic_example.html
+
+docs/source/_static/three_d_example.html
+
+docs/source/_static/three_d_example_assets/
+
+docs/source/reference/media/
+
+# JOSE Paper
+paper/paper.pdf
+paper/media/
+
+# Others
+coverage.xml

.pre-commit-config.yaml

@@ -1,59 +1,34 @@
 repos:
--   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.4.0
-    hooks:
-    -   id: check-yaml
-    -   id: end-of-file-fixer
-    -   id: trailing-whitespace
--   repo: https://github.com/pycqa/isort
-    rev: 5.10.1
-    hooks:
-      - id: isort
-        name: isort (python)
-        args: ["--python-version", "37", "--profile", "black"]
--   repo: https://github.com/psf/black
-    rev: 22.10.0
-    hooks:
-      - id: black
-        args: ["--target-version", "py37"]
--   repo: https://github.com/PyCQA/flake8
-    rev: 6.0.0
-    hooks:
-      - id: flake8
-        additional_dependencies:
-        - flake8-bugbear
-        - flake8-comprehensions
-        - flake8-tidy-imports
-        - flake8-typing-imports
--   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: 'v0.991'
-    hooks:
-    -   id: mypy
-        additional_dependencies: [types-requests, types-setuptools]
-        args:
-        - --install-types
-        - --non-interactive
-        - --ignore-missing-imports
-        # Disallow dynamic typing
-        - --disallow-any-generics
-        - --disallow-subclassing-any
-
-        # Disallow untyped definitions and calls
-        - --disallow-untyped-defs
-        - --disallow-incomplete-defs
-        - --check-untyped-defs
-
-        # None and optional handling
-        - --no-implicit-optional
-
-        # Configuring warnings
-        - --warn-unused-ignores
-        - --warn-no-return
-        - --no-warn-return-any
-        - --warn-redundant-casts
-
-        # Strict equality
-        - --strict-equality
-
-        # Config file
-        - --warn-unused-configs
+- repo: https://github.com/pre-commit/pre-commit-hooks
+  rev: v4.4.0
+  hooks:
+  - id: check-yaml
+  - id: check-toml
+  - id: end-of-file-fixer
+  - id: trailing-whitespace
+- repo: https://github.com/pycqa/isort
+  rev: 5.12.0
+  hooks:
+  - id: isort
+    name: isort (python)
+- repo: https://github.com/macisamuele/language-formatters-pre-commit-hooks
+  rev: v2.10.0
+  hooks:
+  - id: pretty-format-yaml
+    args: [--autofix]
+  - id: pretty-format-toml
+    exclude: poetry.lock
+    args: [--autofix]
+- repo: https://github.com/psf/black
+  rev: 23.7.0
+  hooks:
+  - id: black
+- repo: https://github.com/astral-sh/ruff-pre-commit
+  rev: v0.0.282
+  hooks:
+  - id: ruff
+- repo: https://github.com/pre-commit/mirrors-mypy
+  rev: v1.4.1
+  hooks:
+  - id: mypy
+    additional_dependencies: [types-requests, types-setuptools]

CITATION.cff

@@ -0,0 +1,32 @@
+# This CITATION.cff file was generated with cffinit.
+# Visit https://bit.ly/cffinit to generate yours today!
+
+cff-version: 1.2.0
+title: Manim Slides
+message: A Python package for presenting Manim content anywhere
+type: software
+authors:
+  - name: Jérome Eertmans
+    orcid: 'https://orcid.org/0000-0002-5579-5360'
+    website: 'https://eertmans.be'
+identifiers:
+  - type: doi
+    value: 10.21105/jose.00206
+    description: The paper presenting the software.
+repository-code: 'https://github.com/jeertmans/manim-slides'
+url: 'https://eertmans.be/manim-slides'
+abstract: >-
+  Manim Slides is a Python package that makes presenting
+  Manim animations straightforward. With minimal changes
+  required to pre-existing code, one can slide through
+
+  animations in a PowerPoint-like manner, or share its
+  slides online using ReavealJS’ power.
+keywords:
+  - Education
+  - Math Animations
+  - Presentation Tool
+  - PowerPoint
+  - Python
+license: MIT
+version: v4.16.1

LICENSE.md

@@ -1,674 +1,21 @@
-                    GNU GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
-
- Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
-                            Preamble
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-software and other kinds of works.
-
-  The licenses for most software and other practical works are designed
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-GNU General Public License for most of our software; it applies also to
-any other work released this way by its authors.  You can apply it to
-your programs, too.
-
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-price.  Our General Public Licenses are designed to make sure that you
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+MIT License
+
+Copyright (c) 2023 Jérome Eertmans
+
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+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
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+furnished to do so, subject to the following conditions:
+
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+copies or substantial portions of the Software.
+
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+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,13 +1,22 @@
-![Manim Slides Logo](https://raw.githubusercontent.com/jeertmans/manim-slides/main/static/logo.png)
+<picture>
+  <source media="(prefers-color-scheme: dark)" srcset="https://raw.githubusercontent.com/jeertmans/manim-slides/main/static/logo_dark_transparent.png">
+  <source media="(prefers-color-scheme: light)" srcset="https://raw.githubusercontent.com/jeertmans/manim-slides/main/static/logo_light_transparent.png">
+  <img alt="Manim Slides Logo" src="https://raw.githubusercontent.com/jeertmans/manim-slides/main/static/logo.png">
+</picture>
 
 [![Latest Release][pypi-version-badge]][pypi-version-url]
 [![Python version][pypi-python-version-badge]][pypi-version-url]
-![PyPI - Downloads](https://img.shields.io/pypi/dm/manim-slides)
+[![PyPI - Downloads][pypi-download-badge]][pypi-version-url]
+[![Documentation][documentation-badge]][documentation-url]
+[![DOI][doi-badge]][doi-url]
+[![JOSE Paper][jose-badge]][jose-url]
+[![codecov][codecov-badge]][codecov-url]
+
 # Manim Slides
 
 Tool for live presentations using either [Manim (community edition)](https://www.manim.community/) or [ManimGL](https://3b1b.github.io/manim/). Manim Slides will *automatically* detect the one you are using!
 
-> **_NOTE:_**  This project extends the work of [`manim-presentation`](https://github.com/galatolofederico/manim-presentation), with a lot more features!
+> **NOTE:** this project extends the work of [`manim-presentation`](https://github.com/galatolofederico/manim-presentation), with a lot more features!
 
 - [Installation](#installation)
   * [Dependencies](#dependencies)
@@ -16,24 +25,34 @@ Tool for live presentations using either [Manim (community edition)](https://www
 - [Usage](#usage)
   * [Basic Example](#basic-example)
   * [Key Bindings](#key-bindings)
+  * [Interactive Tutorial](#interactive-tutorial)
   * [Other Examples](#other-examples)
-- [Features and Comparison with Original manim-presentation](#features-and-comparison-with-original-manim-presentation)
+- [Comparison with Similar Tools](#comparison-with-similar-tools)
 - [F.A.Q](#faq)
   * [How to increase quality on Windows](#how-to-increase-quality-on-windows)
 - [Contributing](#contributing)
+  * [Reporting an Issue](#reporting-an-issue)
+  * [Seeking for Help](#seeking-for-help)
+  * [Contact](#contact)
 
 ## Installation
 
+<!-- start install -->
+
 While installing Manim Slides and its dependencies on your global Python is fine, I recommend using a virtual environment (e.g., [venv](https://docs.python.org/3/tutorial/venv.html)) for a local installation.
 
 ### Dependencies
 
+<!-- start deps -->
+
 Manim Slides requires either Manim or ManimGL to be installed. Having both packages installed is fine too.
 
 If none of those packages are installed, please refer to their specific installation guidelines:
 - [Manim](https://docs.manim.community/en/stable/installation.html)
 - [ManimGL](https://3b1b.github.io/manim/getting_started/installation.html)
 
+<!-- end deps -->
+
 ### Pip Install
 
 The recommended way to install the latest release is to use pip:
@@ -42,28 +61,34 @@ The recommended way to install the latest release is to use pip:
 pip install manim-slides
 ```
 
-### Install From Repository
-
-An alternative way to install Manim Slides is to clone the git repository, and install from there:
+Optionally, you can also install Manim or ManimGL using extras[^1]:
 
 ```bash
-git clone https://github.com/jeertmans/manim-slides
-pip install -e .
+pip install manim-slides[manim]   # For Manim
+# or
+pip install manim-slides[manimgl] # For ManimGL
 ```
 
-> *Note:* the `-e` flag allows you to edit the files, and observe the changes directly when using Manim Slides
+[^1]: NOTE: you still need to have Manim or ManimGL platform-specific dependencies installed on your computer.
+
+### Install From Repository
+
+An alternative way to install Manim Slides is to clone the git repository, and install from there: read the [contributing guide](https://eertmans.be/manim-slides/contributing/workflow.html) to know how.
+
+<!-- end install -->
 
 ## Usage
 
+<!-- start usage -->
+
 Using Manim Slides is a two-step process:
-1. Render animations using `Slide` (resp. `ThreeDSlide`) as a base class instead of `Scene` (resp. `ThreeDScene`), and add calls to `self.pause()` everytime you want to create a new slide.
+1. Render animations using `Slide` (resp. `ThreeDSlide`) as a base class instead of `Scene` (resp. `ThreeDScene`), and add calls to `self.next_slide()` everytime you want to create a new slide.
 2. Run `manim-slides` on rendered animations and display them like a *Power Point* presentation.
 
-The command-line documentation is available [online](https://eertmans.be/manim-slides/).
+The documentation is available [online](https://eertmans.be/manim-slides/).
 
 ### Basic Example
 
-
 Wrap a series of animations between `self.start_loop()` and `self.stop_loop()` when you want to loop them (until input to continue):
 
 ```python
@@ -73,32 +98,28 @@ from manim import *
 # or: from manimlib import *
 from manim_slides import Slide
 
-class Example(Slide):
+class BasicExample(Slide):
     def construct(self):
         circle = Circle(radius=3, color=BLUE)
         dot = Dot()
 
         self.play(GrowFromCenter(circle))
-        self.pause()  # Waits user to press continue to go to the next slide
+        self.next_slide()  # Waits user to press continue to go to the next slide
 
         self.start_loop()  # Start loop
         self.play(MoveAlongPath(dot, circle), run_time=2, rate_func=linear)
         self.end_loop()  # This will loop until user inputs a key
 
         self.play(dot.animate.move_to(ORIGIN))
-        self.pause()  # Waits user to press continue to go to the next slide
-
-        self.wait()
+        self.next_slide()  # Waits user to press continue to go to the next slide
 ```
 
-You **must** end your `Slide` with a `self.play(...)` or a `self.wait(...)`.
-
 First, render the animation files:
 
 ```bash
-manim example.py
+manim example.py BasicExample
 # or
-manimgl example.py
+manimgl example.py BasicExample
 ```
 
 To start the presentation using `Scene1`, `Scene2` and so on simply run:
@@ -110,14 +131,20 @@ manim-slides [OPTIONS] Scene1 Scene2...
 Or in this example:
 
 ```bash
-manim-slides Example
+manim-slides BasicExample
 ```
 
+<!-- end usage -->
+
 ##  Key Bindings
 
 The default key bindings to control the presentation are:
 
-![manim-wizard](https://user-images.githubusercontent.com/27275099/197468787-19c83a81-d757-47b9-8f68-218427d30298.png)
+<picture>
+  <source media="(prefers-color-scheme: dark)" srcset="https://raw.githubusercontent.com/jeertmans/manim-slides/main/static/wizard_dark.png">
+  <source media="(prefers-color-scheme: light)" srcset="https://raw.githubusercontent.com/jeertmans/manim-slides/main/static/wizard_light.png">
+  <img alt="Manim Slides Wizard" src="https://raw.githubusercontent.com/jeertmans/manim-slides/main/static/wizard_light.png">
+</picture>
 
 
 You can run the **configuration wizard** to change those key bindings:
@@ -134,6 +161,12 @@ manim-slides init
 
 > **_NOTE:_**  `manim-slides` uses key codes, which are platform dependent. Using the configuration wizard is therefore highly recommended.
 
+## Interactive Tutorial
+
+Click on the image to watch a slides presentation that explains you how to use Manim Slides.
+
+[![Manim Slides Docs](https://raw.githubusercontent.com/jeertmans/manim-slides/main/static/docs.png)](https://eertmans.be/manim-slides/)
+
 ## Other Examples
 
 Other examples are available in the [`example.py`](https://github.com/jeertmans/manim-slides/blob/main/example.py) file, if you downloaded the git repository.
@@ -143,27 +176,21 @@ Below is a small recording of me playing with the slides back and forth.
 ![](https://raw.githubusercontent.com/jeertmans/manim-slides/main/static/example.gif)
 
 
-## Features and Comparison with original manim-presentation
+## Comparison with Similar Tools
 
-Below is a non-exhaustive list of features:
+There exists are variety of tools that allows to create slides presentations containing Manim animations.
 
-| Feature | `manim-slides` | `manim-presentation` |
-|:--------|:--------------:|:--------------------:|
-| Support for Manim | :heavy_check_mark: | :heavy_check_mark: |
-| Support for ManimGL | :heavy_check_mark: | :heavy_multiplication_x: |
-| Configurable key bindings | :heavy_check_mark: | :heavy_check_mark: |
-| Configurable paths | :heavy_check_mark: | :heavy_multiplication_x: |
-| Play / Pause slides | :heavy_check_mark: | :heavy_check_mark: |
-| Next / Previous slide | :heavy_check_mark: | :heavy_check_mark: |
-| Replay slide | :heavy_check_mark: | :heavy_check_mark: |
-| Reverse slide | :heavy_check_mark: | :heavy_multiplication_x: |
-| Multiple key per actions | :heavy_check_mark: | :heavy_multiplication_x: |
-| One command line tool | :heavy_check_mark: | :heavy_multiplication_x: |
-| Robust config file parsing | :heavy_check_mark: | :heavy_multiplication_x: |
-| Support for 3D Scenes | :heavy_check_mark: | :heavy_multiplication_x: |
-| Documented code | :heavy_check_mark: | :heavy_multiplication_x: |
-| Tested on Unix, macOS, and Windows | :heavy_check_mark: | :heavy_multiplication_x: |
-| Hide mouse cursor | :heavy_check_mark: | :heavy_multiplication_x: |
+Below is a comparison of the most used ones with Manim Slides:
+
+| Project name | Manim Slides | Manim Presentation | Manim Editor | Jupyter Notebooks |
+|:------------:|:------------:|:------------------:|:------------:|:-----------------:|
+| Link | [![GitHub Repo stars](https://img.shields.io/github/stars/jeertmans/manim-slides?style=social)](https://github.com/jeertmans/manim-slides) | [![GitHub Repo stars](https://img.shields.io/github/stars/galatolofederico/manim-presentation?style=social)](https://github.com/galatolofederico/manim-presentation) | [![GitHub Repo stars](https://img.shields.io/github/stars/ManimCommunity/manim_editor?style=social)](https://github.com/ManimCommunity/manim_editor) | [![GitHub Repo stars](https://img.shields.io/github/stars/jupyter/notebook?style=social)](https://github.com/jupyter/notebook) |
+| Activity | [![GitHub Repo stars](https://img.shields.io/github/last-commit/jeertmans/manim-slides?style=social)](https://github.com/jeertmans/manim-slides) | [![GitHub Repo stars](https://img.shields.io/github/last-commit/galatolofederico/manim-presentation?style=social)](https://github.com/galatolofederico/manim-presentation) | [![GitHub Repo stars](https://img.shields.io/github/last-commit/ManimCommunity/manim_editor?style=social)](https://github.com/ManimCommunity/manim_editor) | [![GitHub Repo stars](https://img.shields.io/github/last-commit/jupyter/notebook?style=social)](https://github.com/jupyter/notebook) |
+| Usage | Command-line | Command-line | Web Browser | Notebook |
+| Note | Requires minimal modif. in scenes files | Requires minimal modif. in scenes files |  Requires the usage of sections, and configuration through graphical interface | Relies on `nbconvert` to create slides from a Notebook |
+| Support for ManimGL | Yes | No | No | No |
+| Web Browser presentations | Yes | No | Yes | No |
+| Offline presentations | Yes, with Qt | Yes, with OpenCV | No | No
 
 ## F.A.Q
 
@@ -178,8 +205,67 @@ in *Settings*->*Display*.
 
 ## Contributing
 
-Contributions are more than welcome!
+Contributions are more than welcome! Please read through [our contributing section](https://eertmans.be/manim-slides/contributing/index.html).
+
+### Reporting an Issue
+
+<!-- start reporting-an-issue -->
+
+If you think you found a bug,
+an error in the documentation,
+or wish there was some feature that is currently missing,
+we would love to hear from you!
+
+The best way to reach us is via the
+[GitHub issues](https://github.com/jeertmans/manim-slides/issues).
+If your problem is not covered by an already existing (closed or open) issue,
+then we suggest you create a
+[new issue](https://github.com/jeertmans/manim-slides/issues/new/choose).
+You can choose from a list of templates, or open a
+[blank issue](https://github.com/jeertmans/manim-slides/issues/new)
+if your issue does not fit one of the proposed topics.
+
+The more precise you are in the description of your problem, the faster we will
+be able to help you!
+
+<!-- end reporting-an-issue -->
+
+### Seeking for help
+
+<!-- start seeking-for-help -->
+
+Sometimes, you may have a question about Manim Slides,
+not necessarily an issue.
+
+There are two ways you can reach us for questions:
+
+- via the `Question/Help/Support` topic when
+[choosing an issue template](https://github.com/jeertmans/manim-slides/issues/new/choose);
+- or via
+[GitHub discussions](https://github.com/jeertmans/manim-slides/discussions).
+
+<!-- end seeking-for-help -->
+
+### Contact
+
+<!-- start contact -->
+
+Finally, if you do not have any GitHub account,
+or just wish to contact the author of Manim Slides,
+you can do so at: [jeertmans@icloud.com](mailto:jeertmans@icloud.com).
+
+<!-- end contact -->
 
 [pypi-version-badge]: https://img.shields.io/pypi/v/manim-slides?label=manim-slides
 [pypi-version-url]: https://pypi.org/project/manim-slides/
 [pypi-python-version-badge]: https://img.shields.io/pypi/pyversions/manim-slides
+[pypi-download-badge]: https://img.shields.io/pypi/dm/manim-slides
+[documentation-badge]: https://img.shields.io/website?down_color=lightgrey&down_message=offline&label=documentation&up_color=green&up_message=online&url=https%3A%2F%2Feertmans.be%2Fmanim-slides%2F
+[documentation-url]: https://eertmans.be/manim-slides/
+[doi-badge]: https://zenodo.org/badge/DOI/10.5281/zenodo.8215167.svg
+[doi-url]: https://doi.org/10.5281/zenodo.8215167
+[jose-badge]: https://jose.theoj.org/papers/10.21105/jose.00206/status.svg
+[jose-url]: https://doi.org/10.21105/jose.00206
+
+[codecov-badge]: https://codecov.io/gh/jeertmans/manim-slides/branch/main/graph/badge.svg?token=8P4DY9JCE4
+[codecov-url]: https://codecov.io/gh/jeertmans/manim-slides

docs/source/_static/logo.png

@@ -0,0 +1 @@
+../../../static/logo.png

docs/source/_static/logo_dark_docs.png

@@ -0,0 +1 @@
+../../../static/logo_dark_docs.png

docs/source/_static/logo_dark_github.png

@@ -0,0 +1 @@
+../../../static/logo_dark_github.png

docs/source/_static/logo_dark_transparent.png

@@ -0,0 +1 @@
+../../../static/logo_dark_transparent.png

docs/source/_static/logo_light_transparent.png

@@ -0,0 +1 @@
+../../../static/logo_light_transparent.png

docs/source/_static/wizard_dark.png

@@ -0,0 +1 @@
+../../../static/wizard_dark.png

docs/source/_static/wizard_light.png

@@ -0,0 +1 @@
+../../../static/wizard_light.png

docs/source/changelog.md

@@ -0,0 +1,3 @@
+# Changelog
+
+Changes between releases are listed in Manim Slides' [Github releases](https://github.com/jeertmans/manim-slides/releases). You can read the [latest release here](https://github.com/jeertmans/manim-slides/releases).

docs/source/conf.py

@@ -8,13 +8,35 @@
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
 
 project = "Manim Slides"
-copyright = "2022, Jérome Eertmans"
+copyright = "2023, Jérome Eertmans"
 author = "Jérome Eertmans"
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
 
-extensions = ["sphinx.ext.autodoc", "sphinx_click"]
+extensions = [
+    # Built-in
+    "sphinx.ext.autodoc",
+    "sphinx.ext.intersphinx",
+    "sphinx.ext.viewcode",
+    # Additional
+    "nbsphinx",
+    "myst_parser",
+    "sphinxext.opengraph",
+    "sphinx_click",
+    "sphinx_copybutton",
+    # Custom
+    "manim_slides.docs.manim_slides_directive",
+]
+
+typehints_defaults = "comma"
+typehints_use_signature = True
+typehints_use_signature_return = True
+
+myst_enable_extensions = [
+    "colon_fence",
+    "html_admonition",
+]
 
 templates_path = ["_templates"]
 exclude_patterns = []
@@ -25,3 +47,36 @@ exclude_patterns = []
 
 html_theme = "furo"
 html_static_path = ["_static"]
+
+html_theme_options = {
+    "light_logo": "logo_light_transparent.png",
+    "dark_logo": "logo_dark_transparent.png",
+    "footer_icons": [
+        {
+            "name": "GitHub",
+            "url": "https://github.com/jeertmans/manim-slides",
+            "html": """
+                <svg stroke="currentColor" fill="currentColor" stroke-width="0" viewBox="0 0 16 16">
+                    <path fill-rule="evenodd" d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27.68 0 1.36.09 2 .27 1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0 .21.15.46.55.38A8.013 8.013 0 0 0 16 8c0-4.42-3.58-8-8-8z"></path>
+                </svg>
+            """,
+            "class": "",
+        },
+    ],
+    "source_repository": "https://github.com/jeertmans/manim-slides/",
+    "source_branch": "main",
+    "source_directory": "docs/source/",
+}
+
+# -- Intersphinx mapping
+
+intersphinx_mapping = {
+    "python": ("https://docs.python.org/3", None),
+    "manim": ("https://docs.manim.community/en/stable/", None),
+    "manimlib": ("https://3b1b.github.io/manim/", None),
+}
+
+# -- OpenGraph settings
+
+ogp_site_url = "https://eertmans.be/manim-slides/"
+ogp_use_first_image = True

docs/source/contributing/index.md

@@ -0,0 +1,46 @@
+# Contributing
+
+Thank you for your interest in Manim Slides! ✨
+
+Manim Slides is an open source project, first created as a fork of
+[manim-presentation](https://github.com/galatolofederico/manim-presentation)
+(now deprecated in favor to Manim Slides),
+and we welcome contributions of all forms.
+
+This section is here to help fist-time contributors know how they can help this
+project grow. Whether you are already familiar with Manim or GitHub,
+it is worth taking a few minutes to read those documents!
+
+```{toctree}
+:hidden:
+
+workflow
+internals
+```
+
+[Workflow](./workflow)
+: how to work on this project. Start here if you're a new contributor.
+
+[Internals](./internals)
+: how Manim Slides is built and how the various parts of it work.
+
+## Reporting an Issue
+
+```{include} ../../../README.md
+:start-after: <!-- start reporting-an-issue -->
+:end-before: <!-- end reporting-an-issue -->
+```
+
+## Seeking for Help
+
+```{include} ../../../README.md
+:start-after: <!-- start seeking-for-help -->
+:end-before: <!-- end seeking-for-help -->
+```
+
+## Contact
+
+```{include} ../../../README.md
+:start-after: <!-- start contact -->
+:end-before: <!-- end contact -->
+```

docs/source/contributing/internals.md

@@ -0,0 +1,11 @@
+# Internals
+
+Manim-Slides' work in split in two steps: first, when rendering animation, and, second, when converting multiple animations into one slides presentation.
+
+## Rendering
+
+To render animations, Manim Slides simply uses Manim or ManimGL, and creates some additional output files that it needs for the presentation.
+
+## Slides presentation
+
+Manim Slides searches for the local artifacts it generated previously, and concatenates them into one presentation. For the graphical interface, it uses `PySide6`.

docs/source/contributing/workflow.md

@@ -0,0 +1,83 @@
+# Workflow
+
+This document is there to help you recreate a working environment for Manim Slides.
+
+## Dependencies
+
+```{include} ../../../README.md
+:start-after: <!-- start deps -->
+:end-before: <!-- end deps -->
+```
+
+## Forking the repository and cloning it locally
+
+We use GitHub to host Manim Slides' repository, and we encourage contributors to use git.
+
+Useful links:
+
+* [GitHub's Hello World](https://docs.github.com/en/get-started/quickstart/hello-world).
+* [GitHub Pull Request in 100 Seconds](https://www.youtube.com/watch?v=8lGpZkjnkt4&ab_channel=Fireship).
+
+Once you feel comfortable with git and GitHub, [fork](https://github.com/jeertmans/manim-slides/fork) the repository, and clone it locally.
+
+As for every Python project, using virtual environment is recommended to avoid conflicts between modules. For Manim Slides, we use [Poetry](https://python-poetry.org/docs/#installing-with-the-official-installer). If not already, please install it.
+
+## Installing Python modules
+
+With Poetry, installation becomes straightforward:
+
+```bash
+poetry install
+```
+
+This, however, only installs the minimal set of dependencies to run the package.
+
+If you would like to install Manim or ManimGL, as documented in the [quickstart](../quickstart),
+you can use the `--extras` option:
+
+```bash
+poetry install --extras manim   # For Manim
+# or
+poetry install --extras manimgl # For ManimGL
+```
+
+Additionnally, Manim Slides comes with group dependencies for development purposes:
+
+```bash
+poetry install --with dev  # For linters and formatters
+# or
+poetry install --with docs # To build the documentation locally
+```
+
+Another group is `test`, but it is only used for
+[GitHub actions](https://github.com/jeertmans/manim-slides/blob/main/.github/workflows/test_examples.yml).
+
+:::{note}
+You can combine any number of groups or extras when installing the package locally.
+:::
+
+## Running commands
+
+As modules were installed in a new Python environment, you cannot use them directly in the shell.
+Instead, you either need to prepend `poetry run` to any command, e.g.:
+
+```bash
+poetry run manim-slides wizard
+```
+
+or enter a new shell that uses this new Python environment:
+
+```
+poetry shell
+manim-slides wizard
+```
+
+## Testing your code
+
+Most of the tests are done with GitHub actions, thus not on your computer. The only command you should run locally is `pre-commit run --all-files`: this runs a few linter and formatter to make sure the code quality and style stay constant across time. If a warning or an error is displayed, please fix it before going to next step.
+
+## Proposing changes
+
+Once you feel ready and think your contribution is ready to be reviewed, create a [pull request](https://github.com/jeertmans/manim-slides/pulls) and wait for a reviewer to check your work!
+
+Many thanks to you!

docs/source/features_table.md

@@ -0,0 +1,27 @@
+# Features Table
+
+The following summarizes the different presentation features Manim Slides offers.
+
+:::{table} Comparison of the different presentation methods.
+:widths: auto
+:align: center
+
+| Feature / Constraint | [`present`](reference/cli.md) | [`convert --to=html`](reference/cli.md) | [`convert --to=pptx`](reference/cli.md) | [`convert --to=pdf`](reference/cli.md)
+| :--- | :---: | :---: | :---: | :---: |
+| Basic navigation through slides | Yes | Yes | Yes | Yes (static image) |
+| Replay slide | Yes | No | No | N/A |
+| Pause animation | Yes | No | No | N/A |
+| Play slide in reverse | Yes | No | No | N/A |
+| Slide count | Yes | Yes (optional) | Yes (optional) | N/A |
+| Animation count | Yes | No | No | N/A |
+| Needs Python with Manim Slides installed | Yes | No | No | No
+| Requires internet access | No | Yes | No | No |
+| Auto. play slides | Yes | Yes | Yes | N/A |
+| Loops support | Yes | Yes | Yes | N/A |
+| Fully customizable | No | Yes (`--use-template` option) | No | No |
+| Other dependencies | None | A modern web browser | PowerPoint or LibreOffice Impress[^1] | None |
+| Works cross-platforms | Yes | Yes | Partly[^1][^2] | Yes |
+:::
+
+[^1]: If you encounter a problem where slides do not automatically play or loops do not work, please [file an issue on GitHub](https://github.com/jeertmans/manim-slides/issues/new/choose).
+[^2]: PowerPoint online does not seem to support automatic playing of videos, so you need LibreOffice Impress on Linux platforms.

docs/source/index.md

@@ -0,0 +1,52 @@
+---
+hide-toc: true
+og:description: Manim Slides makes creating slides with Manim super easy!
+---
+
+```{eval-rst}
+.. image:: _static/logo_light_transparent.png
+    :width: 600px
+    :align: center
+    :class: only-light
+    :alt: Manim Slide logo
+```
+
+```{eval-rst}
+.. image:: _static/logo_dark_transparent.png
+    :width: 600px
+    :align: center
+    :class: only-dark
+    :alt: Manim Slide logo
+```
+
+# Welcome to Manim Slide's documentation
+
+Manim Slides makes creating slides with Manim super easy!
+
+In a [very few steps](./quickstart), you can create slides and present them either using the GUI, or your browser.
+
+
+Slide through the demo below to get a quick glimpse on what you can do with Manim Slides.
+
+
+<!-- From: https://faq.dailymotion.com/hc/en-us/articles/360022841393-How-to-preserve-the-player-aspect-ratio-on-a-responsive-page -->
+
+<div style="position:relative;padding-bottom:56.25%;"> <iframe style="width:100%;height:100%;position:absolute;left:0px;top:0px;" frameborder="0" width="100%" height="100%" allowfullscreen allow="autoplay" src="_static/slides.html"></iframe></div>
+
+
+```{toctree}
+:hidden:
+
+quickstart
+reference/index
+features_table
+```
+
+```{toctree}
+:caption: Development
+:hidden:
+
+contributing/index
+changelog
+license
+```

docs/source/index.rst

@@ -1,28 +0,0 @@
-.. manim-slides documentation master file, created by
-   sphinx-quickstart on Wed Sep 21 15:07:28 2022.
-   You can adapt this file completely to your liking, but it should at least
-   contain the root `toctree` directive.
-
-.. image:: _static/logo.png
-    :width: 600px
-    :align: center
-    :alt: Manim Slide logo
-
-Welcome to Manim Slide's CLI documentation!
-===========================================
-
-
-.. raw:: html
-
-   <!-- From: https://faq.dailymotion.com/hc/en-us/articles/360022841393-How-to-preserve-the-player-aspect-ratio-on-a-responsive-page -->
-
-   <div style="position:relative;padding-bottom:56.25%;"> <iframe style="width:100%;height:100%;position:absolute;left:0px;top:0px;" frameborder="0" width="100%" height="100%" allowfullscreen allow="autoplay" src="_static/slides.html"></iframe></div>
-
-
-This page contains an exhaustive list of all the commands available with `manim-slides`.
-
-If you need help installing or using Manim Slide, please refer to the `GitHub README <https://github.com/jeertmans/manim-slides>`_.
-
-.. click:: manim_slides.__main__:cli
-    :prog: manim-slides
-    :nested: full

docs/source/license.md

@@ -0,0 +1,5 @@
+# License
+
+
+```{include} ../../LICENSE.md
+```

docs/source/quickstart.md

@@ -0,0 +1,21 @@
+# Quickstart
+
+## Installation
+
+```{include} ../../README.md
+:start-after: <!-- start install -->
+:end-before: <!-- end install -->
+```
+
+## Creating your first slides
+
+```{include} ../../README.md
+:start-after: <!-- start usage -->
+:end-before: <!-- end usage -->
+```
+
+The output slides should look this this:
+
+<div style="position:relative;padding-bottom:56.25%;"> <iframe style="width:100%;height:100%;position:absolute;left:0px;top:0px;" frameborder="0" width="100%" height="100%" allowfullscreen allow="autoplay" src="_static/basic_example.html"></iframe></div>
+
+For more advanced examples, see the [Examples](reference/examples) section.

docs/source/reference/api.md

@@ -0,0 +1,27 @@
+# Application Programming Interface
+
+Manim Slides' API is very limited: it simply consists of two classes, `Slide`
+and `ThreeDSlide`, which are subclasses of `Scene` and `ThreeDScene` from Manim.
+
+Therefore, we only document here the methods we think the end-user will ever
+use, not the methods used internally when rendering.
+
+```{eval-rst}
+.. autoclass:: manim_slides.Slide
+    :members:
+        add_to_canvas,
+        canvas,
+        canvas_mobjects,
+        end_loop,
+        mobjects_without_canvas,
+        next_slide,
+        pause,
+        remove_from_canvas,
+        start_loop,
+        wait_time_between_slides,
+        wipe,
+        zoom,
+
+.. autoclass:: manim_slides.ThreeDSlide
+    :members:
+```

docs/source/reference/cli.md

@@ -0,0 +1,10 @@
+# Command Line Interface
+
+This page contains an exhaustive list of all the commands available with `manim-slides`.
+
+
+```{eval-rst}
+.. click:: manim_slides.__main__:cli
+    :prog: manim-slides
+    :nested: full
+```

docs/source/reference/examples.md

@@ -0,0 +1,130 @@
+# Examples
+
+Contents of `example.py`.
+
+Do not forget to import Manim Slides and Manim or ManimGL:
+
+```python
+from manim import *
+from manim_slides import Slide, ThreeDSlide
+```
+
+or
+
+```python
+from manimlib import *
+from manim_slides import Slide, ThreeDSlide
+```
+
+Then, each presentation, named `SCENE`, was generated with those two commands:
+
+```bash
+manim example.py SCENE # or manimgl example SCENE
+manim-slides convert SCENE scene.html -ccontrols=true
+```
+
+where `-ccontrols=true` indicates that we want to display the blue navigation arrows.
+
+## Basic Example
+
+Basic example from quickstart.
+
+<div style="position:relative;padding-bottom:56.25%;"> <iframe style="width:100%;height:100%;position:absolute;left:0px;top:0px;" frameborder="0" width="100%" height="100%" allowfullscreen allow="autoplay" src="../_static/basic_example.html"></iframe></div>
+
+```{eval-rst}
+.. literalinclude:: ../../../example.py
+   :language: python
+   :linenos:
+   :pyobject: BasicExample
+```
+
+## 3D Example
+
+Example using 3D camera. As Manim and ManimGL handle 3D differently, definitions are slightly different.
+
+<div style="position:relative;padding-bottom:56.25%;"> <iframe style="width:100%;height:100%;position:absolute;left:0px;top:0px;" frameborder="0" width="100%" height="100%" allowfullscreen allow="autoplay" src="../_static/three_d_example.html"></iframe></div>
+
+### With Manim
+
+```{eval-rst}
+.. literalinclude:: ../../../example.py
+   :language: python
+   :linenos:
+   :dedent: 4
+   :start-after: [manim-3d]
+   :end-before: [manim-3d]
+```
+
+### With ManimGL
+
+```{eval-rst}
+.. literalinclude:: ../../../example.py
+   :language: python
+   :linenos:
+   :dedent: 4
+   :start-after: [manimgl-3d]
+   :end-before: [manimgl-3d]
+```
+
+## Subclass Custom Scenes
+
+For compatibility reasons, Manim Slides only provides subclasses for
+`Scene` and `ThreeDScene`.
+However, subclassing other scene classes is totally possible,
+and very simple to do actually!
+
+[For example](https://github.com/jeertmans/manim-slides/discussions/185),
+you can subclass the `MovingCameraScene` class from `manim`
+with the following code:
+
+```{code-block} python
+:linenos:
+
+from manim import *
+from manim_slides import Slide
+
+
+class MovingCameraSlide(Slide, MovingCameraScene):
+    pass
+```
+
+And later use this class anywhere in your code:
+
+
+```{code-block} python
+:linenos:
+
+class SubclassExample(MovingCameraSlide):
+    def construct(self):
+        eq1 = MathTex("x", "=", "1")
+        eq2 = MathTex("x", "=", "2")
+
+        self.play(Write(eq1))
+
+        self.next_slide()
+
+        self.play(
+            TransformMatchingTex(eq1, eq2),
+            self.camera.frame.animate.scale(0.5)
+        )
+
+        self.wait()
+```
+
+:::{note}
+If you do not plan to reuse `MovingCameraSlide` more than once, then you can
+directly write the `construct` method in the body of `MovingCameraSlide`.
+:::
+
+## Advanced Example
+
+A more advanced example is `ConvertExample`, which is used as demo slide and tutorial.
+
+<div style="position:relative;padding-bottom:56.25%;"> <iframe style="width:100%;height:100%;position:absolute;left:0px;top:0px;" frameborder="0" width="100%" height="100%" allowfullscreen allow="autoplay" src="../_static/slides.html"></iframe></div>
+
+```{eval-rst}
+.. literalinclude:: ../../../example.py
+   :language: python
+   :linenos:
+   :pyobject: ConvertExample
+```

docs/source/reference/gui.md

@@ -0,0 +1,71 @@
+# Graphical User Interface
+
+Manim Slides' graphical user interface (GUI) is the *de facto* way to present slides.
+
+If you do not specify one of the commands listed in the [CLI reference](./cli),
+Manim Slides will use **present** by default, which launches a GUI window,
+playing your scene(s) like so:
+
+```bash
+manim-slides [present] [SCENES]...
+```
+
+Some optional parameters can be specified and can be listed with:
+
+```bash
+manim-slides present --help
+```
+
+:::{note}
+All the `SCENES` must be in the same folder (`--folder DIRECTORY`), which
+defaults to `./slides`. If you rendered your animations without changing
+directory, you should not worry about that :-)
+:::
+
+## Configuration File
+
+It is possible to configure Manim Slides via a configuration file, even though
+this feature is currently limited. You may initiliaze the default configuration
+file with:
+
+```bash
+manim-slides init
+```
+
+:::{warning}
+Note that, by default, Manim Slides will use default key bindings that are
+platform-dependent. If you decide to overwrite those with a config file, you may
+encounter some problems from platform to platform.
+:::
+
+## Configuring Key Bindings
+
+If you wish to use other key bindings than the defaults, you can run the
+configuration wizard with:
+
+```bash
+manim-slides wizard
+```
+
+A similar window to the image below will pop up and prompt to change keys.
+
+```{eval-rst}
+.. image:: ../_static/wizard_light.png
+    :width: 300px
+    :align: center
+    :class: only-light
+    :alt: Manim Slide Wizard
+```
+
+```{eval-rst}
+.. image:: ../_static/wizard_dark.png
+    :width: 300px
+    :align: center
+    :class: only-dark
+    :alt: Manim Slide Wizard
+```
+
+:::{note}
+Even though it is not currently supported through the GUI, you can select
+multiple key binding for the same action by modifying the config file.
+:::

docs/source/reference/html.md

@@ -0,0 +1,40 @@
+# HTML Presentations
+
+Manim Slides allows you to convert presentations into one HTML file, with
+[RevealJS](https://revealjs.com/). This file can then be opened with any modern
+web browser, allowing for a nice portability of your presentations.
+
+As with every command with Manim Slides, converting slides' fragments into one
+HTML file (and its assets) can be done in one command:
+
+```bash
+manim-slides convert [SCENES]... DEST
+```
+
+where `DEST` is the `.html` destination file.
+
+## Configuring the Template
+
+Many configuration options are available through the `-c<option>=<value>` syntax.
+Most, if not all, RevealJS options should be available by default. If that is
+not the case, please
+[fill an issue](https://github.com/jeertmans/manim-slides/issues/new/choose)
+on GitHub.
+
+You can print the list of available options with:
+
+```bash
+manim-slides convert --show-config
+```
+
+## Using a Custom Template
+
+The default template used for HTML conversion can be found on
+[GitHub](https://github.com/jeertmans/manim-slides/blob/main/manim_slides/data/revealjs_template.html)
+or printed with the `--show-template` option.
+If you wish to use another template, you can do so with the
+`--use-template FILE` option.
+
+## More about HTML Slides
+
+You can read more about HTML slides in the [sharing](./sharing) section.

docs/source/reference/index.md

@@ -0,0 +1,37 @@
+# Reference Documentation
+
+Automatically generated reference for Manim Slides.
+
+```{toctree}
+:hidden:
+
+api
+cli
+examples
+gui
+html
+IPython magic <ipython_magic>
+sharing
+Sphinx Extension <sphinx_extension>
+```
+
+[Application Programming Interface](./api): list of classes and methods that may
+be useful to the end-user.
+
+[Command Line Interface](./cli): list of all commands available using Manim
+Slides' executable.
+
+[Examples](./examples): curated list of examples and their output.
+
+[Graphical User Interface](./gui): details about the main Manim Slide' feature.
+
+[HTML Presentation](./html): an alternative way of presenting your animations.
+
+[IPython Magic](./ipython_magic): a magic to render and display Manim Slides inside notebooks.
+
++ [Example](./magic_example): example notebook using the magics.
+
+[Sharing](./sharing): how to share your presentation with others.
+
+
+[Sphinx Extension](./sphinx_extension): a Sphinx extension for diplaying Manim Slides animations within your documentation.

docs/source/reference/ipython_magic.md

@@ -0,0 +1,6 @@
+# Manim Slides' IPython magic
+
+```{eval-rst}
+.. automodule:: manim_slides.ipython.ipython_magic
+   :members: ManimSlidesMagic
+```

docs/source/reference/magic_example.ipynb

@@ -0,0 +1,100 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "6896875b-34ce-4fc5-809c-669c295067e7",
+   "metadata": {},
+   "source": [
+    "# Jupyter Magic Example\n",
+    "\n",
+    "This small example shows how to use the Manim Slides cell (`%%manim_slides`) and line (`%manim_slides`) magics:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a73f1c06-c7f8-4f19-a90e-e283bfb8c7c5",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from manim import *\n",
+    "from manim_slides import *"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "68dda1a0-74ff-4d9e-9575-5b25a98f21e7",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "%%manim_slides -v WARNING --progress_bar None MySlide --manim-slides controls=true\n",
+    "\n",
+    "config.media_embed = True\n",
+    "\n",
+    "class MySlide(Slide):\n",
+    "    def construct(self):\n",
+    "        square = Square()\n",
+    "        circle = Circle()\n",
+    "        \n",
+    "        self.play(Create(square))\n",
+    "        self.next_slide()\n",
+    "        self.play(Transform(square, circle))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "54fa2d3e-bfee-417d-b64b-f3f30a8749ea",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "class MyOtherSlide(Slide):\n",
+    "    def construct(self):\n",
+    "        text = VGroup(\n",
+    "            Text(\"Press\"),\n",
+    "            Text(\"and\"),\n",
+    "            Text(\"loop\"),\n",
+    "        ).arrange(DOWN, buff=1.)\n",
+    "        \n",
+    "        self.play(Write(text))\n",
+    "        self.next_slide()\n",
+    "        self.start_loop()\n",
+    "        self.play(Indicate(text[-1], scale_factor=2., run_time=.5))\n",
+    "        self.end_loop()\n",
+    "        self.play(FadeOut(text))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7d8ad450-1487-4ca7-8d89-bf8ac344e1fa",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "%manim_slides -v WARNING --progress_bar None MyOtherSlide --manim-slides controls=true"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "manim-slides",
+   "language": "python",
+   "name": "manim-slides"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.10.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}

docs/source/reference/sharing.md

@@ -0,0 +1,184 @@
+# Sharing your slides
+
+Maybe one of the most important features is the ability to share your
+presentation with other people, or even with yourself but on another computer!
+
+There exists a variety of solutions, and all of them are exposed here.
+
+We will go from the *most restrictive* method, to the least restrictive one.
+If you need to present on a computer without prior knowledge on what will be
+installed on it, please directly refer to the last sections.
+
+> **NOTES:** in the next sections, we will assume your animations are described
+in `example.py`, and you have one presentation called `BasicExample`.
+
+## With Manim Slides installed on the target machine
+
+If Manim Slides, Manim (or ManimGL), and their dependencies are installed, then
+using `manim-slides present` allows for the best presentations, with the most
+options available.
+
+### Sharing your Python file(s)
+
+The lightest way to share your presentation is with the Python files that
+describe the slides.
+
+If you have such files, you can recompile the animations locally, and use
+`manim-slides present` for your presentation. You may want to copy / paste
+you own `.manim-slides.json` config file, but it is **not recommended** if
+you are sharing from one platform (e.g., Linux) to another (e.g., Windows) as
+the key bindings might not be the same.
+
+Example:
+
+```bash
+# If you use ManimGl, replace `manim` with `manimgl`
+manim example.py BasicExample
+
+# This or `manim-slides BasicExample` works since
+# `present` is implied by default
+manim-slides present BasicExample
+```
+
+### Sharing your animations files
+
+If you do not want to recompile all the animations, you can simply share the
+slides folder (defaults to `./slides`). Then, Manim Slides will be able to read
+the animations from this folder and its subdirectories.
+
+Example:
+
+```bash
+# Make sure that the slides directory is in the current
+# working directory, or specify with `--folder <FOLDER>`
+manim-slides present BasicExample
+```
+
+and the corresponding tree:
+
+```
+.
+└── slides
+    ├── BasicExample.json
+    └── files
+        └── BasicExample (files not shown)
+```
+
+## Without Manim Slides installed on the target machine
+
+An alternative to `manim-slides present` is `manim-slides convert`.
+Currently, HTML and PPTX conversion are available, but do not hesitate to propose
+other formats by creating a
+[Feature Request](https://github.com/jeertmans/manim-slides/issues/new/choose),
+or directly proposing a
+[Pull Request](https://github.com/jeertmans/manim-slides/compare).
+
+A major advantage of HTML files is that they can be opened cross-platform,
+granted one has a modern web browser (which is pretty standard).
+
+### Sharing HTML and animation files
+
+First, you need to create the HTML file and its assets directory.
+
+Example:
+
+```bash
+manim-slides convert BasicExample basic_example.html
+```
+
+Then, you need to copy the HTML files and its assets directory to target location,
+while keeping the relative path between the HTML and the assets the same. The
+easiest solution is to compress both the file and the directory into one ZIP,
+and to extract it to the desired location.
+
+By default, the assets directory will be named after the main HTML file, using `{basename}_assets`.
+
+Example:
+
+```
+.
+├── basic_example_assets
+│   ├── 1413466013_2261824125_223132457.mp4
+│   ├── 1672018281_2145352439_3942561600.mp4
+│   └── 1672018281_3136302242_2191168284.mp4
+└── basic_example.html
+```
+
+Then, you can simply open the HTML file with any web browser application.
+
+If you want to embed the presentation inside an HTML web page, a possibility is
+to use an `iframe`:
+
+```html
+<div style="position:relative;padding-bottom:56.25%;">
+    <!-- 56.25 comes from aspect ratio of 16:9, change this accordingly -->
+    <iframe
+        style="width:100%;height:100%;position:absolute;left:0px;top:0px;"
+        frameborder="0"
+        width="100%"
+        height="100%"
+        allowfullscreen
+        allow="autoplay"
+        src="basic_example.html">
+    </iframe>
+</div>
+```
+
+The additional code comes from
+[this article](https://faq.dailymotion.com/hc/en-us/articles/360022841393-How-to-preserve-the-player-aspect-ratio-on-a-responsive-page)
+and it there to preserve the original aspect ratio (16:9).
+
+
+### Sharing ONE HTML file
+
+A future feature, that will be available once
+[#122](https://github.com/jeertmans/manim-slides/issues/122) is solved, will be
+to include all animations as data URI encoded, within the HTML file itself.
+
+### Over the internet
+
+Finally, HTML conversion makes it convenient to play your presentation on a
+remote server.
+
+This is how your are able to watch all the examples on this website. If you want
+to know how to share your slide with GitHub pages, see the
+[workflow file](https://github.com/jeertmans/manim-slides/blob/main/.github/workflows/pages.yml).
+
+> **WARNING:** keep in mind that playing large video files over the internet
+can take some time, and *glitches* may occur between slide transitions for this
+reason.
+
+### With PowerPoint (*EXPERIMENTAL*)
+
+A recent conversion feature is to the PowerPoint format, thanks to the
+`python-pptx` package. Even though it is fully working,
+it is still considered in an *EXPERIMENTAL* status because we do not
+exactly know what versions of PowerPoint (or LibreOffice Impress) are supported.
+
+Basically, you can create a PowerPoint in a single command:
+
+```bash
+manim-slides convert --to=pptx BasicExample basic_example.pptx
+```
+
+All the videos and necessary files will be contained inside the `.pptx` file, so
+you can safely share it with anyone. By default, the `poster_frame_image`, i.e.,
+what is displayed by PowerPoint when the video is not playing, is the first
+frame of each slide. This allows for smooth transitions.
+
+In the future, we hope to provide more features to this format,
+so feel free to suggest new features too!
+
+### Static PDF presentation
+
+If you ever need backup slides, that are only made of PDF pages
+with static images, you can generate such a PDF with the following command:
+
+```bash
+manim-slides convert --to=pdf BasicExample basic_example.pdf
+```
+
+Note that you will lose all the benefits from animated slides. Therefore,
+this is only recommended to be used as a backup plan. By default, the last frame
+of each slide will be printed. This can be changed to be the first one with
+`-cframe_index=first`.

docs/source/reference/sphinx_extension.md

@@ -0,0 +1,6 @@
+# Manim Slides' Sphinx directive
+
+```{eval-rst}
+.. automodule:: manim_slides.docs.manim_slides_directive
+   :members: ManimSlidesDirective
+```

example.py

@@ -16,39 +16,64 @@ else:
 from manim_slides import Slide, ThreeDSlide
 
 
-class Example(Slide):
+class BasicExample(Slide):
     def construct(self):
         circle = Circle(radius=3, color=BLUE)
         dot = Dot()
 
         self.play(GrowFromCenter(circle))
-        self.pause()
+        self.next_slide()  # Waits user to press continue to go to the next slide
 
-        self.start_loop()
+        self.start_loop()  # Start loop
         self.play(MoveAlongPath(dot, circle), run_time=2, rate_func=linear)
-        self.end_loop()
+        self.end_loop()  # This will loop until user inputs a key
 
         self.play(dot.animate.move_to(ORIGIN))
-        self.pause()
+        self.next_slide()  # Waits user to press continue to go to the next slide
 
-        self.play(dot.animate.move_to(RIGHT * 3))
-        self.pause()
 
-        self.start_loop()
-        self.play(MoveAlongPath(dot, circle), run_time=2, rate_func=linear)
-        self.end_loop()
+class MultipleAnimationsInLastSlide(Slide):
+    """This is used to check against solution for issue #161."""
 
-        # Each slide MUST end with an animation (a self.wait is considered an animation)
-        self.play(dot.animate.move_to(ORIGIN))
+    def construct(self):
+        circle = Circle(color=BLUE)
+        dot = Dot()
+
+        self.play(GrowFromCenter(circle))
+        self.play(FadeIn(dot))
+        self.next_slide()
+
+        self.play(dot.animate.move_to(RIGHT))
+        self.play(dot.animate.move_to(UP))
+        self.play(dot.animate.move_to(LEFT))
+        self.play(dot.animate.move_to(DOWN))
+
+        self.next_slide()
+
+
+class TestFileTooLong(Slide):
+    """This is used to check against solution for issue #123."""
+
+    def construct(self):
+        import random
+
+        circle = Circle(radius=3, color=BLUE)
+        dot = Dot()
+        self.play(GrowFromCenter(circle), run_time=0.1)
+
+        for _ in range(30):
+            direction = (random.random() - 0.5) * LEFT + (random.random() - 0.5) * UP
+            self.play(dot.animate.move_to(direction), run_time=0.1)
+            self.play(dot.animate.move_to(ORIGIN), run_time=0.1)
+
+        self.next_slide()
 
 
 class ConvertExample(Slide):
     """WARNING: this example does not seem to work with ManimGL."""
 
-    def tinywait(self):
-        self.wait(0.1)
-
     def construct(self):
+        self.wait_time_between_slides = 0.1
 
         title = VGroup(
             Text("From Manim animations", t2c={"From": BLUE}),
@@ -70,7 +95,7 @@ class ConvertExample(Slide):
 
         self.play(FadeIn(title))
 
-        self.pause()
+        self.next_slide()
 
         code = Code(
             code="""from manim import *
@@ -139,10 +164,10 @@ class Example(Slide):
         self.add(dot)
 
         self.play(Indicate(dot, scale_factor=2))
-        self.pause()
+        self.next_slide()
         square = Square()
         self.play(Transform(dot, square))
-        self.pause()
+        self.next_slide()
         self.play(Rotate(square, angle=PI/2))
 """,
             language="python",
@@ -161,7 +186,7 @@ class Example(Slide):
         self.end_loop()
         square = Square()
         self.play(Transform(dot, square))
-        self.pause()
+        self.next_slide()
         self.play(Rotate(square, angle=PI/2))
 """,
             language="python",
@@ -184,42 +209,33 @@ class Example(Slide):
             language="console",
         ).shift(DOWN)
 
-        self.clear()
-
-        self.play(FadeIn(code))
-        self.tinywait()
-        self.pause()
+        self.play(self.wipe(title, code))
+        self.next_slide()
 
         self.play(FadeIn(step, shift=RIGHT))
         self.play(Transform(code, code_step_1))
-        self.tinywait()
-        self.pause()
+        self.next_slide()
 
         self.play(Transform(step, step_2))
         self.play(Transform(code, code_step_2))
-        self.tinywait()
-        self.pause()
+        self.next_slide()
 
         self.play(Transform(step, step_3))
         self.play(Transform(code, code_step_3))
-        self.tinywait()
-        self.pause()
+        self.next_slide()
 
         self.play(Transform(step, step_4))
         self.play(Transform(code, code_step_4))
-        self.tinywait()
-        self.pause()
+        self.next_slide()
 
         self.play(Transform(step, step_5))
         self.play(Transform(code, code_step_5))
-        self.tinywait()
-        self.pause()
+        self.next_slide()
 
         self.play(Transform(step, step_6))
         self.play(Transform(code, code_step_6))
         self.play(code.animate.shift(UP), FadeIn(code_step_7), FadeIn(or_text))
-        self.tinywait()
-        self.pause()
+        self.next_slide()
 
         watch_text = Text("Watch result on next slides!").shift(2 * DOWN).scale(0.5)
 
@@ -238,11 +254,9 @@ class Example(Slide):
         self.play(Transform(dot, square))
         self.remove(dot)
         self.add(square)
-        self.tinywait()
-        self.pause()
+        self.next_slide()
         self.play(Rotate(square, angle=PI / 4))
-        self.tinywait()
-        self.pause()
+        self.next_slide()
 
         learn_more_text = (
             VGroup(
@@ -254,13 +268,12 @@ class Example(Slide):
         )
 
         self.play(Transform(square, learn_more_text))
-        self.tinywait()
 
 
 # For ThreeDExample, things are different
 
 if not MANIMGL:
-
+    # [manim-3d]
     class ThreeDExample(ThreeDSlide):
         def construct(self):
             axes = ThreeDAxes()
@@ -274,7 +287,7 @@ if not MANIMGL:
             self.play(GrowFromCenter(circle))
             self.begin_ambient_camera_rotation(rate=75 * DEGREES / 4)
 
-            self.pause()
+            self.next_slide()
 
             self.start_loop()
             self.play(MoveAlongPath(dot, circle), run_time=4, rate_func=linear)
@@ -284,19 +297,20 @@ if not MANIMGL:
             self.move_camera(phi=75 * DEGREES, theta=30 * DEGREES)
 
             self.play(dot.animate.move_to(ORIGIN))
-            self.pause()
+            self.next_slide()
 
             self.play(dot.animate.move_to(RIGHT * 3))
-            self.pause()
+            self.next_slide()
 
             self.start_loop()
             self.play(MoveAlongPath(dot, circle), run_time=2, rate_func=linear)
             self.end_loop()
 
-            # Each slide MUST end with an animation (a self.wait is considered an animation)
             self.play(dot.animate.move_to(ORIGIN))
 
+    # [manim-3d]
 else:
+    # [manimgl-3d]
     # WARNING: 3b1b's manim change how ThreeDScene work,
     # this is why things have to be managed differently.
     class ThreeDExample(Slide):
@@ -319,10 +333,13 @@ else:
             )
 
             self.play(GrowFromCenter(circle))
-            updater = lambda m, dt: m.increment_theta((75 * DEGREES / 4) * dt)
+
+            def updater(m, dt):
+                return m.increment_theta((75 * DEGREES / 4) * dt)
+
             frame.add_updater(updater)
 
-            self.pause()
+            self.next_slide()
 
             self.start_loop()
             self.play(MoveAlongPath(dot, circle), run_time=4, rate_func=linear)
@@ -331,14 +348,15 @@ else:
             frame.remove_updater(updater)
             self.play(frame.animate.set_theta(30 * DEGREES))
             self.play(dot.animate.move_to(ORIGIN))
-            self.pause()
+            self.next_slide()
 
             self.play(dot.animate.move_to(RIGHT * 3))
-            self.pause()
+            self.next_slide()
 
             self.start_loop()
             self.play(MoveAlongPath(dot, circle), run_time=2, rate_func=linear)
             self.end_loop()
 
-            # Each slide MUST end with an animation (a self.wait is considered an animation)
             self.play(dot.animate.move_to(ORIGIN))
+
+    # [manimgl-3d]

manim_slides/__init__.py

@@ -1,3 +1,62 @@
 # flake8: noqa: F401
+import sys
+from types import ModuleType
+from typing import Any, List
+
 from .__version__ import __version__
-from .slide import Slide, ThreeDSlide
+
+
+class module(ModuleType):
+    def __getattr__(self, name: str) -> Any:
+        if name == "Slide" or name == "ThreeDSlide":
+            module = __import__(
+                "manim_slides.slide", None, None, ["Slide", "ThreeDSlide"]
+            )
+            return getattr(module, name)
+        elif name == "ManimSlidesMagic":
+            module = __import__(
+                "manim_slides.ipython.ipython_magic", None, None, ["ManimSlidesMagic"]
+            )
+            magic = getattr(module, name)
+
+            from IPython import get_ipython
+
+            ipy = get_ipython()
+
+            if ipy is not None:
+                ipy.register_magics(magic)
+
+            return magic
+
+        return ModuleType.__getattribute__(self, name)
+
+    def __dir__(self) -> List[str]:
+        result = list(new_module.__all__)
+        result.extend(
+            (
+                "__file__",
+                "__doc__",
+                "__all__",
+                "__docformat__",
+                "__name__",
+                "__path__",
+                "__package__",
+                "__version__",
+            )
+        )
+        return result
+
+
+old_module = sys.modules["manim_slides"]
+new_module = sys.modules["manim_slides"] = module("manim_slides")
+
+new_module.__dict__.update(
+    {
+        "__file__": __file__,
+        "__package__": "manim_slides",
+        "__path__": __path__,
+        "__doc__": __doc__,
+        "__version__": __version__,
+        "__all__": ("__version__", "ManimSlidesMagic", "Slide", "ThreeDSlide"),
+    }
+)

manim_slides/__main__.py

@@ -4,9 +4,9 @@ import click
 import requests
 from click_default_group import DefaultGroup
 
-from . import __version__
+from .__version__ import __version__
 from .convert import convert
-from .manim import logger
+from .logger import make_logger
 from .present import list_scenes, present
 from .wizard import init, wizard
 
@@ -27,6 +27,7 @@ def cli(notify_outdated_version: bool) -> None:
 
     If no command is specified, defaults to `present`.
     """
+    logger = make_logger()
     # Code below is mostly a copy from:
     # https://github.com/ManimCommunity/manim/blob/main/manim/cli/render/commands.py
     if notify_outdated_version:

manim_slides/__version__.py

@@ -1 +1 @@
-__version__ = "4.7.1"
+__version__ = "4.16.1"

manim_slides/commons.py

@@ -1,10 +1,11 @@
+from pathlib import Path
 from typing import Any, Callable
 
 import click
 from click import Context, Parameter
 
 from .defaults import CONFIG_PATH, FOLDER_PATH
-from .manim import logger
+from .logger import logger
 
 F = Callable[..., Any]
 Wrapper = Callable[[F], F]
@@ -18,7 +19,7 @@ def config_path_option(function: F) -> F:
         "config_path",
         metavar="FILE",
         default=CONFIG_PATH,
-        type=click.Path(dir_okay=False),
+        type=click.Path(dir_okay=False, path_type=Path),
         help="Set path to configuration file.",
         show_default=True,
     )
@@ -43,8 +44,7 @@ def config_options(function: F) -> F:
 def verbosity_option(function: F) -> F:
     """Wraps a function to add verbosity option."""
 
-    def callback(ctx: Context, param: Parameter, value: bool) -> None:
-
+    def callback(ctx: Context, param: Parameter, value: str) -> None:
         if not value or ctx.resilient_parsing:
             return
 
@@ -54,10 +54,10 @@ def verbosity_option(function: F) -> F:
         "-v",
         "--verbosity",
         type=click.Choice(
-            ["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"],
+            ["PERF", "DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"],
             case_sensitive=False,
         ),
-        help="Verbosity of CLI output",
+        help="Verbosity of CLI output. PERF will log performances (timing) information.",
         default=None,
         expose_value=False,
         envvar="MANIM_SLIDES_VERBOSITY",
@@ -74,7 +74,7 @@ def folder_path_option(function: F) -> F:
         "--folder",
         metavar="DIRECTORY",
         default=FOLDER_PATH,
-        type=click.Path(exists=True, file_okay=False),
+        type=click.Path(exists=True, file_okay=False, path_type=Path),
         help="Set slides folder.",
         show_default=True,
     )

manim_slides/config.py

@@ -1,43 +1,63 @@
-import os
+import hashlib
+import json
 import shutil
 import subprocess
 import tempfile
 from enum import Enum
-from typing import Callable, Dict, List, Optional, Set, Union
+from pathlib import Path
+from typing import Any, Dict, List, Optional, Set, Tuple, Union
 
-from pydantic import BaseModel, root_validator, validator
+import rtoml
+from pydantic import (
+    BaseModel,
+    Field,
+    FilePath,
+    PositiveInt,
+    field_validator,
+    model_validator,
+)
+from pydantic_extra_types.color import Color
 from PySide6.QtCore import Qt
 
-from .manim import FFMPEG_BIN, logger
+from .defaults import FFMPEG_BIN
+from .logger import logger
 
 
-def merge_basenames(files: List[str]) -> str:
+def merge_basenames(files: List[FilePath]) -> Path:
     """
     Merge multiple filenames by concatenating basenames.
     """
+    logger.info(f"Generating a new filename for animations: {files}")
 
-    dirname = os.path.dirname(files[0])
-    _, ext = os.path.splitext(files[0])
+    dirname: Path = files[0].parent
+    ext = files[0].suffix
 
-    basename = "_".join(os.path.splitext(os.path.basename(file))[0] for file in files)
+    basenames = (file.stem for file in files)
 
-    return os.path.join(dirname, basename + ext)
+    basenames_str = ",".join(f"{len(b)}:{b}" for b in basenames)
+
+    # We use hashes to prevent too-long filenames, see issue #123:
+    # https://github.com/jeertmans/manim-slides/issues/123
+    basename = hashlib.sha256(basenames_str.encode()).hexdigest()
+
+    return dirname.joinpath(basename + ext)
 
 
 class Key(BaseModel):  # type: ignore
     """Represents a list of key codes, with optionally a name."""
 
-    ids: Set[int]
+    ids: List[PositiveInt] = Field(unique=True)
     name: Optional[str] = None
 
-    def set_ids(self, *ids: int) -> None:
-        self.ids = set(ids)
+    @field_validator("ids")
+    @classmethod
+    def ids_is_non_empty_set(cls, ids: Set[Any]) -> Set[Any]:
+        if len(ids) <= 0:
+            raise ValueError("Key's ids must be a non-empty set")
+        return ids
 
-    @validator("ids", each_item=True)
-    def id_is_posint(cls, v: int) -> int:
-        if v < 0:
-            raise ValueError("Key ids cannot be negative integers")
-        return v
+    def set_ids(self, *ids: int) -> None:
+        self.ids = list(set(ids))
 
     def match(self, key_id: int) -> bool:
         m = key_id in self.ids
@@ -48,9 +68,7 @@ class Key(BaseModel):  # type: ignore
         return m
 
 
-class Config(BaseModel):  # type: ignore
-    """General Manim Slides config"""
-
+class Keys(BaseModel):  # type: ignore
     QUIT: Key = Key(ids=[Qt.Key_Q], name="QUIT")
     CONTINUE: Key = Key(ids=[Qt.Key_Right], name="CONTINUE / NEXT")
     BACK: Key = Key(ids=[Qt.Key_Left], name="BACK")
@@ -59,28 +77,47 @@ class Config(BaseModel):  # type: ignore
     PLAY_PAUSE: Key = Key(ids=[Qt.Key_Space], name="PLAY / PAUSE")
     HIDE_MOUSE: Key = Key(ids=[Qt.Key_H], name="HIDE / SHOW MOUSE")
 
-    @root_validator
+    @model_validator(mode="before")
     def ids_are_unique_across_keys(cls, values: Dict[str, Key]) -> Dict[str, Key]:
         ids: Set[int] = set()
 
         for key in values.values():
-            if len(ids.intersection(key.ids)) != 0:
+            if len(ids.intersection(key["ids"])) != 0:
                 raise ValueError(
                     "Two or more keys share a common key code: please make sure each key has distinct key codes"
                 )
-            ids.update(key.ids)
+            ids.update(key["ids"])
 
         return values
 
-    def merge_with(self, other: "Config") -> "Config":
+    def merge_with(self, other: "Keys") -> "Keys":
         for key_name, key in self:
             other_key = getattr(other, key_name)
-            key.ids.update(other_key.ids)
+            key.ids = list(set(key.ids).union(other_key.ids))
             key.name = other_key.name or key.name
 
         return self
 
 
+class Config(BaseModel):  # type: ignore
+    """General Manim Slides config"""
+
+    keys: Keys = Keys()
+
+    @classmethod
+    def from_file(cls, path: Path) -> "Config":
+        """Reads a configuration from a file."""
+        return cls.model_validate(rtoml.load(path))  # type: ignore
+
+    def to_file(self, path: Path) -> None:
+        """Dumps the configuration to a file."""
+        rtoml.dump(self.model_dump(), path, pretty=True)
+
+    def merge_with(self, other: "Config") -> "Config":
+        self.keys = self.keys.merge_with(other.keys)
+        return self
+
+
 class SlideType(str, Enum):
     slide = "slide"
     loop = "loop"
@@ -92,26 +129,27 @@ class SlideConfig(BaseModel):  # type: ignore
     start_animation: int
     end_animation: int
     number: int
-    terminated: bool = False
+    terminated: bool = Field(False, exclude=True)
 
-    @validator("start_animation", "end_animation")
+    @field_validator("start_animation", "end_animation")
+    @classmethod
     def index_is_posint(cls, v: int) -> int:
         if v < 0:
             raise ValueError("Animation index (start or end) cannot be negative")
         return v
 
-    @validator("number")
+    @field_validator("number")
+    @classmethod
     def number_is_strictly_posint(cls, v: int) -> int:
         if v <= 0:
             raise ValueError("Slide number cannot be negative or zero")
         return v
 
-    @root_validator
+    @model_validator(mode="before")
     def start_animation_is_before_end(
         cls, values: Dict[str, Union[SlideType, int, bool]]
     ) -> Dict[str, Union[SlideType, int, bool]]:
         if values["start_animation"] >= values["end_animation"]:  # type: ignore
-
             if values["start_animation"] == values["end_animation"] == 0:
                 raise ValueError(
                     "You have to play at least one animation (e.g., `self.wait()`) before pausing. If you want to start paused, use the approriate command-line option when presenting. IMPORTANT: when using ManimGL, `self.wait()` is not considered to be an animation, so prefer to directly use `self.play(...)`."
@@ -138,61 +176,68 @@ class SlideConfig(BaseModel):  # type: ignore
 
 
 class PresentationConfig(BaseModel):  # type: ignore
-    slides: List[SlideConfig]
-    files: List[str]
+    slides: List[SlideConfig] = Field(min_length=1)
+    files: List[FilePath]
+    resolution: Tuple[PositiveInt, PositiveInt] = (1920, 1080)
+    background_color: Color = "black"
 
-    @validator("files", pre=True, each_item=True)
-    def is_file_and_exists(cls, v: str) -> str:
-        if not os.path.exists(v):
-            raise ValueError(
-                f"Animation file {v} does not exist. Are you in the right directory?"
-            )
+    @classmethod
+    def from_file(cls, path: Path) -> "PresentationConfig":
+        """Reads a presentation configuration from a file."""
+        with open(path, "r") as f:
+            obj = json.load(f)
 
-        if not os.path.isfile(v):
-            raise ValueError(f"Animation file {v} is not a file")
+            if files := obj.get("files", None):
+                # First parent is ../slides
+                # so we take the parent of this parent
+                parent = Path(path).parents[1]
+                for i in range(len(files)):
+                    files[i] = parent / files[i]
 
-        return v
+            return cls.model_validate(obj)  # type: ignore
 
-    @root_validator
+    def to_file(self, path: Path) -> None:
+        """Dumps the presentation configuration to a file."""
+        with open(path, "w") as f:
+            f.write(self.model_dump_json(indent=2))
+
+    @model_validator(mode="after")
     def animation_indices_match_files(
-        cls, values: Dict[str, Union[List[SlideConfig], List[str]]]
-    ) -> Dict[str, Union[List[SlideConfig], List[str]]]:
-        files = values.get("files")
-        slides = values.get("slides")
-
-        if files is None or slides is None:
-            return values
+        cls, config: "PresentationConfig"
+    ) -> "PresentationConfig":
+        files = config.files
+        slides = config.slides
 
         n_files = len(files)
 
         for slide in slides:
-            if slide.end_animation > n_files:  # type: ignore
+            if slide.end_animation > n_files:
                 raise ValueError(
                     f"The following slide's contains animations not listed in files {files}: {slide}"
                 )
 
-        return values
+        return config
 
-    def move_to(self, dest: str, copy: bool = True) -> "PresentationConfig":
+    def copy_to(self, dest: Path, use_cached: bool = True) -> "PresentationConfig":
         """
-        Moves (or copy) the files to a given directory.
+        Copy the files to a given directory.
         """
-        copy_func: Callable[[str, str], None] = shutil.copy
-        move_func: Callable[[str, str], None] = shutil.move
-        move = copy_func if copy else move_func
-
         n = len(self.files)
         for i in range(n):
             file = self.files[i]
-            basename = os.path.basename(file)
-            dest_path = os.path.join(dest, basename)
-            logger.debug(f"Moving / copying {file} to {dest_path}")
-            move(file, dest_path)
+            dest_path = dest / self.files[i].name
             self.files[i] = dest_path
+            if use_cached and dest_path.exists():
+                logger.debug(f"Skipping copy of {file}, using cached copy")
+                continue
+            logger.debug(f"Copying {file} to {dest_path}")
+            shutil.copy(file, dest_path)
 
         return self
 
-    def concat_animations(self, dest: Optional[str] = None) -> "PresentationConfig":
+    def concat_animations(
+        self, dest: Optional[Path] = None, use_cached: bool = True
+    ) -> "PresentationConfig":
         """
         Concatenate animations such that each slide contains one animation.
         """
@@ -202,15 +247,23 @@ class PresentationConfig(BaseModel):  # type: ignore
         for i, slide_config in enumerate(self.slides):
             files = self.files[slide_config.slides_slice]
 
+            slide_config.start_animation = i
+            slide_config.end_animation = i + 1
+
             if len(files) > 1:
                 dest_path = merge_basenames(files)
+                dest_paths.append(dest_path)
+
+                if use_cached and dest_path.exists():
+                    logger.debug(f"Concatenated animations already exist for slide {i}")
+                    continue
 
                 f = tempfile.NamedTemporaryFile(mode="w", delete=False)
-                f.writelines(f"file {os.path.abspath(path)}\n" for path in files)
+                f.writelines(f"file '{path.absolute()}'\n" for path in files)
                 f.close()
 
-                command = [
-                    FFMPEG_BIN,
+                command: List[str] = [
+                    str(FFMPEG_BIN),
                     "-f",
                     "concat",
                     "-safe",
@@ -219,7 +272,7 @@ class PresentationConfig(BaseModel):  # type: ignore
                     f.name,
                     "-c",
                     "copy",
-                    dest_path,
+                    str(dest_path),
                     "-y",
                 ]
                 logger.debug(" ".join(command))
@@ -234,18 +287,18 @@ class PresentationConfig(BaseModel):  # type: ignore
                 if error:
                     logger.debug(error.decode())
 
-                dest_paths.append(dest_path)
+                if not dest_path.exists():
+                    raise ValueError(
+                        "could not properly concatenate animations, use `-v INFO` for more details"
+                    )
 
             else:
                 dest_paths.append(files[0])
 
-            slide_config.start_animation = i
-            slide_config.end_animation = i + 1
-
         self.files = dest_paths
 
         if dest:
-            return self.move_to(dest)
+            return self.copy_to(dest)
 
         return self
 

manim_slides/convert.py

@@ -1,22 +1,77 @@
+import mimetypes
 import os
+import platform
+import subprocess
+import sys
+import tempfile
 import webbrowser
+from base64 import b64encode
 from enum import Enum
-from typing import Any, Callable, Dict, Generator, List, Type
+from importlib import resources
+from pathlib import Path
+from typing import Any, Callable, Dict, Generator, List, Optional, Type, Union
 
 import click
-import pkg_resources
+import cv2
+import pptx
 from click import Context, Parameter
-from pydantic import BaseModel
+from lxml import etree
+from PIL import Image
+from pydantic import (
+    BaseModel,
+    ConfigDict,
+    FilePath,
+    GetCoreSchemaHandler,
+    PositiveFloat,
+    PositiveInt,
+    ValidationError,
+)
+from pydantic_core import CoreSchema, core_schema
+from tqdm import tqdm
 
+from . import data
 from .commons import folder_path_option, verbosity_option
 from .config import PresentationConfig
+from .logger import logger
 from .present import get_scenes_presentation_config
 
+DATA_URI_FIX = r"""
+// Fix found by @t-fritsch on GitHub
+// see: https://github.com/hakimel/reveal.js/discussions/3362#discussioncomment-6651475.
+function fixBase64VideoBackground(event) {
+    // event.previousSlide, event.currentSlide, event.indexh, event.indexv
+    if (event.currentSlide.getAttribute('data-background-video')) {
+        const background = Reveal.getSlideBackground(event.indexh, event.indexv),
+            video = background.querySelector('video'),
+            sources = video.querySelectorAll('source');
+
+        sources.forEach((source, i) => {
+            const src = source.getAttribute('src');
+            if(src.match(/^data:video.*;base64$/)){
+                const nextSrc = sources[i+1]?.getAttribute('src');
+                video.setAttribute('src', `${src},${nextSrc}`);
+            }
+        });
+    }
+}
+Reveal.on( 'ready', fixBase64VideoBackground );
+Reveal.on( 'slidechanged', fixBase64VideoBackground );
+"""
+
+
+def open_with_default(file: Path) -> None:
+    system = platform.system()
+    if system == "Darwin":
+        subprocess.call(("open", str(file)))
+    elif system == "Windows":
+        os.startfile(str(file))  # type: ignore[attr-defined]
+    else:
+        subprocess.call(("xdg-open", str(file)))
+
 
 def validate_config_option(
     ctx: Context, param: Parameter, value: Any
 ) -> Dict[str, str]:
-
     config = {}
 
     for c_option in value:
@@ -31,32 +86,184 @@ def validate_config_option(
     return config
 
 
+def data_uri(file: Path) -> str:
+    """
+    Reads a video and returns the corresponding data-uri.
+    """
+    b64 = b64encode(file.read_bytes()).decode("ascii")
+    mime_type = mimetypes.guess_type(file)[0] or "video/mp4"
+
+    return f"data:{mime_type};base64,{b64}"
+
+
 class Converter(BaseModel):  # type: ignore
     presentation_configs: List[PresentationConfig] = []
     assets_dir: str = "{basename}_assets"
+    template: Optional[Path] = None
 
-    def convert_to(self, dest: str) -> None:
+    def convert_to(self, dest: Path) -> None:
         """Converts self, i.e., a list of presentations, into a given format."""
         raise NotImplementedError
 
-    def open(self, file: str) -> bool:
+    def load_template(self) -> str:
+        """Returns the template as a string.
+
+        An empty string is returned if no template is used."""
+        return ""
+
+    def open(self, file: Path) -> Any:
         """Opens a file, generated with converter, using appropriate application."""
-        return webbrowser.open(file)
+        raise NotImplementedError
 
     @classmethod
     def from_string(cls, s: str) -> Type["Converter"]:
         """Returns the appropriate converter from a string name."""
         return {
             "html": RevealJS,
+            "pdf": PDF,
+            "pptx": PowerPoint,
         }[s]
 
 
-class JSBool(str, Enum):
+class Str(str):
+    """A simple string, but quoted when needed."""
+
+    # This fixes pickling issue on Python 3.8
+    __reduce_ex__ = str.__reduce_ex__
+
+    @classmethod
+    def __get_pydantic_core_schema__(
+        cls, source_type: Any, handler: GetCoreSchemaHandler
+    ) -> CoreSchema:
+        return core_schema.str_schema()
+
+    def __str__(self) -> str:
+        """Ensures that the string is correctly quoted."""
+        if self in ["true", "false", "null"]:
+            return self
+        else:
+            return f"'{super().__str__()}'"
+
+
+class StrEnum(Enum):
+    def __str__(self) -> str:
+        return str(self.value)
+
+
+Function = str  # Basically, anything
+
+
+class JsTrue(str, StrEnum):
+    true = "true"
+
+
+class JsFalse(str, StrEnum):
+    false = "false"
+
+
+class JsBool(Str, StrEnum):  # type: ignore
     true = "true"
     false = "false"
 
 
-class RevealTheme(str, Enum):
+class JsNull(Str, StrEnum):  # type: ignore
+    null = "null"
+
+
+class ControlsLayout(Str, StrEnum):  # type: ignore
+    edges = "edges"
+    bottom_right = "bottom-right"
+
+
+class ControlsBackArrows(Str, StrEnum):  # type: ignore
+    faded = "faded"
+    hidden = "hidden"
+    visibly = "visibly"
+
+
+class SlideNumber(Str, StrEnum):  # type: ignore
+    true = "true"
+    false = "false"
+    hdotv = "h.v"
+    handv = "h/v"
+    c = "c"
+    candt = "c/t"
+
+
+class ShowSlideNumber(Str, StrEnum):  # type: ignore
+    all = "all"
+    print = "print"
+    speaker = "speaker"
+
+
+class KeyboardCondition(Str, StrEnum):  # type: ignore
+    null = "null"
+    focused = "focused"
+
+
+class NavigationMode(Str, StrEnum):  # type: ignore
+    default = "default"
+    linear = "linear"
+    grid = "grid"
+
+
+class AutoPlayMedia(Str, StrEnum):  # type: ignore
+    null = "null"
+    true = "true"
+    false = "false"
+
+
+PreloadIframes = AutoPlayMedia
+
+
+class AutoAnimateMatcher(Str, StrEnum):  # type: ignore
+    null = "null"
+
+
+class AutoAnimateEasing(Str, StrEnum):  # type: ignore
+    ease = "ease"
+
+
+AutoSlide = Union[PositiveInt, JsFalse]
+
+
+class AutoSlideMethod(Str, StrEnum):  # type: ignore
+    null = "null"
+
+
+MouseWheel = Union[JsNull, float]
+
+
+class Transition(Str, StrEnum):  # type: ignore
+    none = "none"
+    fade = "fade"
+    slide = "slide"
+    convex = "convex"
+    concave = "concave"
+    zoom = "zoom"
+
+
+class TransitionSpeed(Str, StrEnum):  # type: ignore
+    default = "default"
+    fast = "fast"
+    slow = "slow"
+
+
+class BackgroundSize(Str, StrEnum):  # type: ignore
+    # From: https://developer.mozilla.org/en-US/docs/Web/CSS/background-size
+    # TODO: support more background size
+    contain = "contain"
+    cover = "cover"
+
+
+BackgroundTransition = Transition
+
+
+class Display(Str, StrEnum):  # type: ignore
+    block = "block"
+
+
+class RevealTheme(str, StrEnum):
     black = "black"
     white = "white"
     league = "league"
@@ -71,88 +278,323 @@ class RevealTheme(str, Enum):
 
 
 class RevealJS(Converter):
-    background_color: str = "black"
-    controls: JSBool = JSBool.false
-    embedded: JSBool = JSBool.false
-    fragments: JSBool = JSBool.false
-    height: str = "100%"
-    loop: JSBool = JSBool.false
-    progress: JSBool = JSBool.false
-    reveal_version: str = "3.7.0"
+    # Export option: use data-uri
+    data_uri: bool = False
+    # Presentation size options from RevealJS
+    width: Union[Str, int] = Str("100%")
+    height: Union[Str, int] = Str("100%")
+    margin: float = 0.04
+    min_scale: float = 0.2
+    max_scale: float = 2.0
+    # Configuration options from RevealJS
+    controls: JsBool = JsBool.false
+    controls_tutorial: JsBool = JsBool.true
+    controls_layout: ControlsLayout = ControlsLayout.bottom_right
+    controls_back_arrows: ControlsBackArrows = ControlsBackArrows.faded
+    progress: JsBool = JsBool.false
+    slide_number: SlideNumber = SlideNumber.false
+    show_slide_number: Union[ShowSlideNumber, Function] = ShowSlideNumber.all
+    hash_one_based_index: JsBool = JsBool.false
+    hash: JsBool = JsBool.false
+    respond_to_hash_changes: JsBool = JsBool.false
+    history: JsBool = JsBool.false
+    keyboard: JsBool = JsBool.true
+    keyboard_condition: Union[KeyboardCondition, Function] = KeyboardCondition.null
+    disable_layout: JsBool = JsBool.false
+    overview: JsBool = JsBool.true
+    center: JsBool = JsBool.true
+    touch: JsBool = JsBool.true
+    loop: JsBool = JsBool.false
+    rtl: JsBool = JsBool.false
+    navigation_mode: NavigationMode = NavigationMode.default
+    shuffle: JsBool = JsBool.false
+    fragments: JsBool = JsBool.true
+    fragment_in_url: JsBool = JsBool.true
+    embedded: JsBool = JsBool.false
+    help: JsBool = JsBool.true
+    pause: JsBool = JsBool.true
+    show_notes: JsBool = JsBool.false
+    auto_play_media: AutoPlayMedia = AutoPlayMedia.null
+    preload_iframes: PreloadIframes = PreloadIframes.null
+    auto_animate: JsBool = JsBool.true
+    auto_animate_matcher: Union[AutoAnimateMatcher, Function] = AutoAnimateMatcher.null
+    auto_animate_easing: AutoAnimateEasing = AutoAnimateEasing.ease
+    auto_animate_duration: float = 1.0
+    auto_animate_unmatched: JsBool = JsBool.true
+    auto_animate_styles: List[str] = [
+        "opacity",
+        "color",
+        "background-color",
+        "padding",
+        "font-size",
+        "line-height",
+        "letter-spacing",
+        "border-width",
+        "border-color",
+        "border-radius",
+        "outline",
+        "outline-offset",
+    ]
+    auto_slide: AutoSlide = 0
+    auto_slide_stoppable: JsBool = JsBool.true
+    auto_slide_method: Union[AutoSlideMethod, Function] = AutoSlideMethod.null
+    default_timing: Union[JsNull, int] = JsNull.null
+    mouse_wheel: JsBool = JsBool.false
+    preview_links: JsBool = JsBool.false
+    post_message: JsBool = JsBool.true
+    post_message_events: JsBool = JsBool.false
+    focus_body_on_page_visibility_change: JsBool = JsBool.true
+    transition: Transition = Transition.none
+    transition_speed: TransitionSpeed = TransitionSpeed.default
+    background_size: BackgroundSize = BackgroundSize.contain  # Not in RevealJS
+    background_transition: BackgroundTransition = BackgroundTransition.none
+    pdf_max_pages_per_slide: Union[int, str] = "Number.POSITIVE_INFINITY"
+    pdf_separate_fragments: JsBool = JsBool.true
+    pdf_page_height_offset: int = -1
+    view_distance: int = 3
+    mobile_view_distance: int = 2
+    display: Display = Display.block
+    hide_inactive_cursor: JsBool = JsBool.true
+    hide_cursor_time: int = 5000
+    # Add. options
+    background_color: str = "black"  # TODO: use pydantic.color.Color
+    reveal_version: str = "4.4.0"
     reveal_theme: RevealTheme = RevealTheme.black
-    shuffle: JSBool = JSBool.false
     title: str = "Manim Slides"
-    width: str = "100%"
+    model_config = ConfigDict(use_enum_values=True, extra="forbid")
 
-    class Config:
-        use_enum_values = True
-
-    def get_sections_iter(self) -> Generator[str, None, None]:
+    def get_sections_iter(self, assets_dir: Path) -> Generator[str, None, None]:
         """Generates a sequence of sections, one per slide, that will be included into the html template."""
         for presentation_config in self.presentation_configs:
             for slide_config in presentation_config.slides:
                 file = presentation_config.files[slide_config.start_animation]
-                file = os.path.join(self.assets_dir, os.path.basename(file))
 
-                if slide_config.is_loop():
-                    yield f'<section data-background-video="{file}" data-background-video-loop></section>'
+                logger.debug(f"Writing video section with file {file}")
+
+                if self.data_uri:
+                    file = data_uri(file)
                 else:
-                    yield f'<section data-background-video="{file}"></section>'
+                    file = assets_dir / file.name
+
+                # TODO: document this
+                # Videos are muted because, otherwise, the first slide never plays correctly.
+                # This is due to a restriction in playing audio without the user doing anything.
+                # Later, this might be useful to only mute the first video, or to make it optional.
+                # Read more about this:
+                #   https://developer.mozilla.org/en-US/docs/Web/Media/Autoplay_guide#autoplay_and_autoplay_blocking
+                if slide_config.is_loop():
+                    yield f'<section data-background-size={self.background_size.value} data-background-color="{presentation_config.background_color}" data-background-video="{file}" data-background-video-muted data-background-video-loop></section>'
+                else:
+                    yield f'<section data-background-size={self.background_size.value} data-background-color="{presentation_config.background_color}" data-background-video="{file}" data-background-video-muted></section>'
 
     def load_template(self) -> str:
         """Returns the RevealJS HTML template as a string."""
-        return pkg_resources.resource_string(
-            __name__, "data/revealjs_template.html"
-        ).decode()
+        if isinstance(self.template, Path):
+            return self.template.read_text()
 
-    def convert_to(self, dest: str) -> None:
+        if sys.version_info < (3, 9):
+            return resources.read_text(data, "revealjs_template.html")
+
+        return resources.files(data).joinpath("revealjs_template.html").read_text()
+
+    def open(self, file: Path) -> bool:
+        return webbrowser.open(file.absolute().as_uri())
+
+    def convert_to(self, dest: Path) -> None:
         """Converts this configuration into a RevealJS HTML presentation, saved to DEST."""
-        dirname = os.path.dirname(dest)
-        basename, ext = os.path.splitext(os.path.basename(dest))
+        if self.data_uri:
+            assets_dir = Path("")  # Actually we won't care.
 
-        self.assets_dir = self.assets_dir.format(
-            dirname=dirname, basename=basename, ext=ext
-        )
-        full_assets_dir = os.path.join(dirname, self.assets_dir)
+            for presentation_config in self.presentation_configs:
+                presentation_config.concat_animations()
+        else:
+            dirname = dest.parent
+            basename = dest.stem
+            ext = dest.suffix
 
-        os.makedirs(full_assets_dir, exist_ok=True)
+            assets_dir = Path(
+                self.assets_dir.format(dirname=dirname, basename=basename, ext=ext)
+            )
+            full_assets_dir = dirname / assets_dir
 
-        for presentation_config in self.presentation_configs:
-            presentation_config.concat_animations().move_to(full_assets_dir)
+            logger.debug(f"Assets will be saved to: {full_assets_dir}")
+
+            full_assets_dir.mkdir(parents=True, exist_ok=True)
+
+            for presentation_config in self.presentation_configs:
+                presentation_config.concat_animations().copy_to(full_assets_dir)
 
         with open(dest, "w") as f:
-
-            sections = "".join(self.get_sections_iter())
+            sections = "".join(self.get_sections_iter(assets_dir))
 
             revealjs_template = self.load_template()
-            content = revealjs_template.format(sections=sections, **self.dict())
+
+            if self.data_uri:
+                data_uri_fix = DATA_URI_FIX
+            else:
+                data_uri_fix = ""
+
+            content = revealjs_template.format(
+                sections=sections, data_uri_fix=data_uri_fix, **self.dict()
+            )
 
             f.write(content)
 
 
+class FrameIndex(str, Enum):
+    first = "first"
+    last = "last"
+
+
+class PDF(Converter):
+    frame_index: FrameIndex = FrameIndex.last
+    resolution: PositiveFloat = 100.0
+    model_config = ConfigDict(use_enum_values=True, extra="forbid")
+
+    def open(self, file: Path) -> None:
+        return open_with_default(file)
+
+    def convert_to(self, dest: Path) -> None:
+        """Converts this configuration into a PDF presentation, saved to DEST."""
+
+        def read_image_from_video_file(file: Path, frame_index: FrameIndex) -> Image:
+            cap = cv2.VideoCapture(str(file))
+
+            if frame_index == FrameIndex.last:
+                index = cap.get(cv2.CAP_PROP_FRAME_COUNT)
+                cap.set(cv2.CAP_PROP_POS_FRAMES, index - 1)
+
+            ret, frame = cap.read()
+
+            if ret:
+                frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
+                return Image.fromarray(frame)
+            else:
+                raise ValueError("Failed to read {image_index} image from video file")
+
+        images = []
+
+        for i, presentation_config in enumerate(self.presentation_configs):
+            presentation_config.concat_animations()
+            for slide_config in tqdm(
+                presentation_config.slides,
+                desc=f"Generating video slides for config {i + 1}",
+                leave=False,
+            ):
+                file = presentation_config.files[slide_config.start_animation]
+
+                images.append(read_image_from_video_file(file, self.frame_index))
+
+        images[0].save(
+            dest,
+            "PDF",
+            resolution=self.resolution,
+            save_all=True,
+            append_images=images[1:],
+        )
+
+
+class PowerPoint(Converter):
+    left: PositiveInt = 0
+    top: PositiveInt = 0
+    width: PositiveInt = 1280
+    height: PositiveInt = 720
+    auto_play_media: bool = True
+    poster_frame_image: Optional[FilePath] = None
+    model_config = ConfigDict(use_enum_values=True, extra="forbid")
+
+    def open(self, file: Path) -> None:
+        return open_with_default(file)
+
+    def convert_to(self, dest: Path) -> None:
+        """Converts this configuration into a PowerPoint presentation, saved to DEST."""
+        prs = pptx.Presentation()
+        prs.slide_width = self.width * 9525
+        prs.slide_height = self.height * 9525
+
+        layout = prs.slide_layouts[6]  # Should be blank
+
+        # From GitHub issue comment:
+        # - https://github.com/scanny/python-pptx/issues/427#issuecomment-856724440
+        def auto_play_media(
+            media: pptx.shapes.picture.Movie, loop: bool = False
+        ) -> None:
+            el_id = xpath(media.element, ".//p:cNvPr")[0].attrib["id"]
+            el_cnt = xpath(
+                media.element.getparent().getparent().getparent(),
+                './/p:timing//p:video//p:spTgt[@spid="%s"]' % el_id,
+            )[0]
+            cond = xpath(el_cnt.getparent().getparent(), ".//p:cond")[0]
+            cond.set("delay", "0")
+
+            if loop:
+                ctn = xpath(el_cnt.getparent().getparent(), ".//p:cTn")[0]
+                ctn.set("repeatCount", "indefinite")
+
+        def xpath(el: etree.Element, query: str) -> etree.XPath:
+            nsmap = {"p": "http://schemas.openxmlformats.org/presentationml/2006/main"}
+            return etree.ElementBase.xpath(el, query, namespaces=nsmap)
+
+        def save_first_image_from_video_file(file: Path) -> Optional[str]:
+            cap = cv2.VideoCapture(str(file))
+            ret, frame = cap.read()
+
+            if ret:
+                f = tempfile.NamedTemporaryFile(mode="w", delete=False, suffix=".png")
+                cv2.imwrite(f.name, frame)
+                return f.name
+            else:
+                logger.warn("Failed to read first image from video file")
+                return None
+
+        for i, presentation_config in enumerate(self.presentation_configs):
+            presentation_config.concat_animations()
+            for slide_config in tqdm(
+                presentation_config.slides,
+                desc=f"Generating video slides for config {i + 1}",
+                leave=False,
+            ):
+                file = presentation_config.files[slide_config.start_animation]
+
+                mime_type = mimetypes.guess_type(file)[0]
+
+                if self.poster_frame_image is None:
+                    poster_frame_image = save_first_image_from_video_file(file)
+                else:
+                    poster_frame_image = str(self.poster_frame_image)
+
+                slide = prs.slides.add_slide(layout)
+                movie = slide.shapes.add_movie(
+                    str(file),
+                    self.left,
+                    self.top,
+                    self.width * 9525,
+                    self.height * 9525,
+                    poster_frame_image=poster_frame_image,
+                    mime_type=mime_type,
+                )
+                if self.auto_play_media:
+                    auto_play_media(movie, loop=slide_config.is_loop())
+
+        prs.save(dest)
+
+
 def show_config_options(function: Callable[..., Any]) -> Callable[..., Any]:
     """Wraps a function to add a `--show-config` option."""
 
     def callback(ctx: Context, param: Parameter, value: bool) -> None:
-
         if not value or ctx.resilient_parsing:
             return
 
-        to = ctx.params.get("to")
+        to = ctx.params.get("to", "html")
 
-        if to:
-            converter = Converter.from_string(to)(scenes=[])
-            for key, value in converter.dict().items():
-                click.echo(f"{key}: {repr(value)}")
+        converter = Converter.from_string(to)(presentation_configs=[])
+        for key, value in converter.dict().items():
+            click.echo(f"{key}: {repr(value)}")
 
-            ctx.exit()
+        ctx.exit()
 
-        else:
-            raise click.UsageError(
-                "Using --show-config option requires to first specify --to option."
-            )
-
-    return click.option(
+    return click.option(  # type: ignore
         "--show-config",
         is_flag=True,
         help="Show supported options for given format and exit.",
@@ -163,13 +605,41 @@ def show_config_options(function: Callable[..., Any]) -> Callable[..., Any]:
     )(function)
 
 
+def show_template_option(function: Callable[..., Any]) -> Callable[..., Any]:
+    """Wraps a function to add a `--show-template` option."""
+
+    def callback(ctx: Context, param: Parameter, value: bool) -> None:
+        if not value or ctx.resilient_parsing:
+            return
+
+        to = ctx.params.get("to", "html")
+        template = ctx.params.get("template", None)
+
+        converter = Converter.from_string(to)(
+            presentation_configs=[], template=template
+        )
+        click.echo(converter.load_template())
+
+        ctx.exit()
+
+    return click.option(  # type: ignore
+        "--show-template",
+        is_flag=True,
+        help="Show the template (currently) used for a given conversion format and exit.",
+        default=None,
+        expose_value=False,
+        show_envvar=True,
+        callback=callback,
+    )(function)
+
+
 @click.command()
 @click.argument("scenes", nargs=-1)
 @folder_path_option
-@click.argument("dest")
+@click.argument("dest", type=click.Path(dir_okay=False, path_type=Path))
 @click.option(
     "--to",
-    type=click.Choice(["html"], case_sensitive=False),
+    type=click.Choice(["html", "pdf", "pptx"], case_sensitive=False),
     default="html",
     show_default=True,
     help="Set the conversion format to use.",
@@ -187,18 +657,27 @@ def show_config_options(function: Callable[..., Any]) -> Callable[..., Any]:
     "config_options",
     multiple=True,
     callback=validate_config_option,
-    help="Configuration options passed to the converter. E.g., pass `-cbackground_color=red` to set the background color to red (if supported).",
+    help="Configuration options passed to the converter. E.g., pass `-cslide_number=true` to display slide numbers.",
 )
+@click.option(
+    "--use-template",
+    "template",
+    metavar="FILE",
+    type=click.Path(exists=True, dir_okay=False, path_type=Path),
+    help="Use the template given by FILE instead of default one. To echo the default template, use `--show-template`.",
+)
+@show_template_option
 @show_config_options
 @verbosity_option
 def convert(
     scenes: List[str],
-    folder: str,
-    dest: str,
+    folder: Path,
+    dest: Path,
     to: str,
     open_result: bool,
     force: bool,
     config_options: Dict[str, str],
+    template: Optional[Path],
 ) -> None:
     """
     Convert SCENE(s) into a given format and writes the result in DEST.
@@ -206,11 +685,28 @@ def convert(
 
     presentation_configs = get_scenes_presentation_config(scenes, folder)
 
-    converter = Converter.from_string(to)(
-        presentation_configs=presentation_configs, **config_options
-    )
+    try:
+        converter = Converter.from_string(to)(
+            presentation_configs=presentation_configs,
+            template=template,
+            **config_options,
+        )
 
-    converter.convert_to(dest)
+        converter.convert_to(dest)
 
-    if open_result:
-        converter.open(dest)
+        if open_result:
+            converter.open(dest)
+
+    except ValidationError as e:
+        errors = e.errors()
+
+        msg = [
+            f"{len(errors)} error(s) occured with configuration options for '{to}', see below."
+        ]
+
+        for error in errors:
+            option = error["loc"][0]
+            _msg = error["msg"]
+            msg.append(f"Option '{option}': {_msg}")
+
+        raise click.UsageError("\n".join(msg))

manim_slides/data/revealjs_template.html

@@ -1,185 +1,290 @@
 <!doctype html>
 <html>
 
-<head>
-	<meta charset="utf-8">
-	<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
 
-	<title>{title}</title>
+    <title>{title}</title>
 
-	<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/reveal.js@{reveal_version}/css/reveal.css">
-	<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/reveal.js@{reveal_version}/css/theme/{reveal_theme}.css">
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/reveal.js/{reveal_version}/reveal.min.css">
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/reveal.js/{reveal_version}/theme/{reveal_theme}.min.css">
 
-	<!-- Theme used for syntax highlighting of code -->
-	<!-- <link rel="stylesheet" href="lib/css/zenburn.css"> -->
-	<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/styles/zenburn.min.css">
+    <!-- Theme used for syntax highlighting of code -->
+    <!-- <link rel="stylesheet" href="lib/css/zenburn.css"> -->
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/styles/zenburn.min.css">
 
-	<!-- Printing and PDF exports -->
-	<script>
-		var link = document.createElement('link');
-		link.rel = 'stylesheet';
-		link.type = 'text/css';
-		link.href = window.location.search.match(/print-pdf/gi) ? 'https://cdn.jsdelivr.net/npm/reveal.js@{reveal_version}/css/print/pdf.css' : 'https://cdn.jsdelivr.net/npm/reveal.js@{reveal_version}/css/print/paper.css';
-		document.getElementsByTagName('head')[0].appendChild(link);
-	</script>
-	<!-- <link rel="stylesheet" href="index.css"> -->
-</head>
+    <!-- <link rel="stylesheet" href="index.css"> -->
+  </head>
 
-<body>
-	<div class="reveal">
-		<div class="slides">
-            {sections}
-		</div>
-	</div>
+  <body>
+    <div class="reveal">
+      <div class="slides">
+        {sections}
+      </div>
+    </div>
 
-	<!--<script src="lib/js/head.min.js"></script>-->
-	<script src="https://cdn.jsdelivr.net/npm/headjs@1.0.3/dist/1.0.0/head.min.js"></script>
-	<script src="https://cdn.jsdelivr.net/npm/reveal.js@{reveal_version}/js/reveal.min.js"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/reveal.js/{reveal_version}/reveal.min.js"></script>
 
-	<!-- <script src="index.js"></script> -->
-	<script>
-		// More info about config & dependencies:
-		// - https://github.com/hakimel/reveal.js#configuration
-		// - https://github.com/hakimel/reveal.js#dependencies
-		Reveal.initialize({{
-			// Display controls in the bottom right corner
-			controls: {controls},
+    <!-- To include plugins, see: https://revealjs.com/plugins/ -->
 
-			width: '{width}',
-			height: '{height}',
+    <!-- <script src="index.js"></script> -->
+    <script>
+        Reveal.initialize({{
+           // The "normal" size of the presentation, aspect ratio will
+           // be preserved when the presentation is scaled to fit different
+           // resolutions. Can be specified using percentage units.
+           width: {width},
+           height: {height},
 
-			// Display a presentation progress bar
-			progress: {progress},
+           // Factor of the display size that should remain empty around
+           // the content
+           margin: {margin},
 
-			// Set default timing of 2 minutes per slide
-			defaultTiming: 120,
+           // Bounds for smallest/largest possible scale to apply to content
+           minScale: {min_scale},
+           maxScale: {max_scale},
 
-			// Display the page number of the current slide
-			slideNumber: true,
+           // Display presentation control arrows
+           controls: {controls},
 
-			// Push each slide change to the browser history
-			history: false,
+           // Help the user learn the controls by providing hints, for example by
+           // bouncing the down arrow when they first encounter a vertical slide
+           controlsTutorial: {controls_tutorial},
 
-			// Enable keyboard shortcuts for navigation
-			keyboard: true,
+           // Determines where controls appear, "edges" or "bottom-right"
+           controlsLayout: {controls_layout},
 
-			// Enable the slide overview mode
-			overview: true,
+           // Visibility rule for backwards navigation arrows; "faded", "hidden"
+           // or "visible"
+           controlsBackArrows: {controls_back_arrows},
 
-			// Vertical centering of slides
-			center: true,
+           // Display a presentation progress bar
+           progress: {progress},
 
-			// Enables touch navigation on devices with touch input
-			touch: true,
+           // Display the page number of the current slide
+           // - true:    Show slide number
+           // - false:   Hide slide number
+           //
+           // Can optionally be set as a string that specifies the number formatting:
+           // - "h.v":   Horizontal . vertical slide number (default)
+           // - "h/v":   Horizontal / vertical slide number
+           // - "c":   Flattened slide number
+           // - "c/t":   Flattened slide number / total slides
+           //
+           // Alternatively, you can provide a function that returns the slide
+           // number for the current slide. The function should take in a slide
+           // object and return an array with one string [slideNumber] or
+           // three strings [n1,delimiter,n2]. See #formatSlideNumber().
+           slideNumber: {slide_number},
 
-			// Loop the presentation
-			loop: {loop},
+           // Can be used to limit the contexts in which the slide number appears
+           // - "all":      Always show the slide number
+           // - "print":    Only when printing to PDF
+           // - "speaker":  Only in the speaker view
+           showSlideNumber: {show_slide_number},
 
-			// Change the presentation direction to be RTL
-			rtl: false,
+           // Use 1 based indexing for # links to match slide number (default is zero
+           // based)
+           hashOneBasedIndex: {hash_one_based_index},
 
-			// Randomizes the order of slides each time the presentation loads
-			shuffle: {shuffle},
+           // Add the current slide number to the URL hash so that reloading the
+           // page/copying the URL will return you to the same slide
+           hash: {hash},
 
-			// Turns fragments on and off globally
-			fragments: {fragments},
+           // Flags if we should monitor the hash and change slides accordingly
+           respondToHashChanges: {respond_to_hash_changes},
 
-			// Flags if the presentation is running in an embedded mode,
-			// i.e. contained within a limited portion of the screen
-			embedded: {embedded},
+           // Push each slide change to the browser history.  Implies `hash: true`
+           history: {history},
 
-			// Flags if we should show a help overlay when the questionmark
-			// key is pressed
-			help: true,
+           // Enable keyboard shortcuts for navigation
+           keyboard: {keyboard},
 
-			// Flags if speaker notes should be visible to all viewers
-			showNotes: false,
+           // Optional function that blocks keyboard events when retuning false
+           //
+           // If you set this to 'focused', we will only capture keyboard events
+           // for embedded decks when they are in focus
+           keyboardCondition: {keyboard_condition},
 
-			// Global override for autolaying embedded media (video/audio/iframe)
-			// - null: Media will only autoplay if data-autoplay is present
-			// - true: All media will autoplay, regardless of individual setting
-			// - false: No media will autoplay, regardless of individual setting
-			autoPlayMedia: null,
+           // Disables the default reveal.js slide layout (scaling and centering)
+           // so that you can use custom CSS layout
+           disableLayout: {disable_layout},
 
-			// Number of milliseconds between automatically proceeding to the
-			// next slide, disabled when set to 0, this value can be overwritten
-			// by using a data-autoslide attribute on your slides
-			autoSlide: 0,
+           // Enable the slide overview mode
+           overview: {overview},
 
-			// Stop auto-sliding after user input
-			autoSlideStoppable: true,
+           // Vertical centering of slides
+           center: {center},
 
-			// Use this method for navigation when auto-sliding
-			autoSlideMethod: Reveal.navigateNext,
+           // Enables touch navigation on devices with touch input
+           touch: {touch},
 
-			// Enable slide navigation via mouse wheel
-			mouseWheel: false,
+           // Loop the presentation
+           loop: {loop},
 
-			// Hides the address bar on mobile devices
-			hideAddressBar: true,
+           // Change the presentation direction to be RTL
+           rtl: {rtl},
 
-			// Opens links in an iframe preview overlay
-			previewLinks: true,
+           // Changes the behavior of our navigation directions.
+           //
+           // "default"
+           // Left/right arrow keys step between horizontal slides, up/down
+           // arrow keys step between vertical slides. Space key steps through
+           // all slides (both horizontal and vertical).
+           //
+           // "linear"
+           // Removes the up/down arrows. Left/right arrows step through all
+           // slides (both horizontal and vertical).
+           //
+           // "grid"
+           // When this is enabled, stepping left/right from a vertical stack
+           // to an adjacent vertical stack will land you at the same vertical
+           // index.
+           //
+           // Consider a deck with six slides ordered in two vertical stacks:
+           // 1.1    2.1
+           // 1.2    2.2
+           // 1.3    2.3
+           //
+           // If you're on slide 1.3 and navigate right, you will normally move
+           // from 1.3 -> 2.1. If "grid" is used, the same navigation takes you
+           // from 1.3 -> 2.3.
+           navigationMode: {navigation_mode},
 
-			// Transition style
-			transition: 'none', // none/fade/slide/convex/concave/zoom
+           // Randomizes the order of slides each time the presentation loads
+           shuffle: {shuffle},
 
-			// Transition speed
-			transitionSpeed: 'default', // default/fast/slow
+           // Turns fragments on and off globally
+           fragments: {fragments},
 
-			// Transition style for full page slide backgrounds
-			backgroundTransition: 'none', // none/fade/slide/convex/concave/zoom
+           // Flags whether to include the current fragment in the URL,
+           // so that reloading brings you to the same fragment position
+           fragmentInURL: {fragment_in_url},
 
-			// Number of slides away from the current that are visible
-			viewDistance: 3,
+           // Flags if the presentation is running in an embedded mode,
+           // i.e. contained within a limited portion of the screen
+           embedded: {embedded},
 
-			// Parallax background image
-			parallaxBackgroundImage: '', // e.g. "'https://s3.amazonaws.com/hakim-static/reveal-js/reveal-parallax-1.jpg'"
+           // Flags if we should show a help overlay when the question-mark
+           // key is pressed
+           help: {help},
 
-			// Parallax background size
-			parallaxBackgroundSize: '', // CSS syntax, e.g. "2100px 900px"
+           // Flags if it should be possible to pause the presentation (blackout)
+           pause: {pause},
 
-			// Number of pixels to move the parallax background per slide
-			// - Calculated automatically unless specified
-			// - Set to 0 to disable movement along an axis
-			parallaxBackgroundHorizontal: null,
-			parallaxBackgroundVertical: null,
+           // Flags if speaker notes should be visible to all viewers
+           showNotes: {show_notes},
 
+           // Global override for autolaying embedded media (video/audio/iframe)
+           // - null:   Media will only autoplay if data-autoplay is present
+           // - true:   All media will autoplay, regardless of individual setting
+           // - false:  No media will autoplay, regardless of individual setting
+           autoPlayMedia: {auto_play_media},
 
-			// The display mode that will be used to show slides
-			display: 'block',
+           // Global override for preloading lazy-loaded iframes
+           // - null:   Iframes with data-src AND data-preload will be loaded when within
+           //           the viewDistance, iframes with only data-src will be loaded when visible
+           // - true:   All iframes with data-src will be loaded when within the viewDistance
+           // - false:  All iframes with data-src will be loaded only when visible
+           preloadIframes: {preload_iframes},
 
-			/*
-			multiplex: {{
-				// Example values. To generate your own, see the socket.io server instructions.
-				secret: '13652805320794272084', // Obtained from the socket.io server. Gives this (the master) control of the presentation
-				id: '1ea875674b17ca76', // Obtained from socket.io server
-				url: 'https://reveal-js-multiplex-ccjbegmaii.now.sh' // Location of socket.io server
-			}},
-			*/
+           // Can be used to globally disable auto-animation
+           autoAnimate: {auto_animate},
 
-			dependencies: [
-				{{ src: 'https://cdn.jsdelivr.net/npm/reveal.js@{reveal_version}/plugin/markdown/marked.js' }},
-				{{ src: 'https://cdn.jsdelivr.net/npm/reveal.js@{reveal_version}/plugin/markdown/markdown.js' }},
-				{{ src: 'https://cdn.jsdelivr.net/npm/reveal.js@{reveal_version}/plugin/notes/notes.js', async: true }},
-				{{ src: 'https://cdn.jsdelivr.net/npm/reveal.js@{reveal_version}/plugin/highlight/highlight.js', async: true, callback: function () {{ hljs.initHighlightingOnLoad(); }} }},
-				//{{ src: '//cdn.socket.io/socket.io-1.3.5.js', async: true }},
-				//{{ src: 'plugin/multiplex/master.js', async: true }},
-				// and if you want speaker notes
-				{{ src: 'https://cdn.jsdelivr.net/npm/reveal.js@{reveal_version}/plugin/notes-server/client.js', async: true }}
+           // Optionally provide a custom element matcher that will be
+           // used to dictate which elements we can animate between.
+           autoAnimateMatcher: {auto_animate_matcher},
 
-			],
-			markdown: {{
-				//            renderer: myrenderer,
-				smartypants: true
-			}}
-		}});
-		Reveal.configure({{
-			// PDF Configurations
-			pdfMaxPagesPerSlide: 1
+           // Default settings for our auto-animate transitions, can be
+           // overridden per-slide or per-element via data arguments
+           autoAnimateEasing: {auto_animate_easing},
+           autoAnimateDuration: {auto_animate_duration},
+           autoAnimateUnmatched: {auto_animate_unmatched},
 
-		}});
-	</script>
-</body>
+           // CSS properties that can be auto-animated. Position & scale
+           // is matched separately so there's no need to include styles
+           // like top/right/bottom/left, width/height or margin.
+           autoAnimateStyles: {auto_animate_styles},
+
+           // Controls automatic progression to the next slide
+           // - 0:      Auto-sliding only happens if the data-autoslide HTML attribute
+           //           is present on the current slide or fragment
+           // - 1+:     All slides will progress automatically at the given interval
+           // - false:  No auto-sliding, even if data-autoslide is present
+           autoSlide: {auto_slide},
+
+           // Stop auto-sliding after user input
+           autoSlideStoppable: {auto_slide_stoppable},
+
+           // Use this method for navigation when auto-sliding (defaults to navigateNext)
+           autoSlideMethod: {auto_slide_method},
+
+           // Specify the average time in seconds that you think you will spend
+           // presenting each slide. This is used to show a pacing timer in the
+           // speaker view
+           defaultTiming: {default_timing},
+
+           // Enable slide navigation via mouse wheel
+           mouseWheel: {mouse_wheel},
+
+           // Opens links in an iframe preview overlay
+           // Add `data-preview-link` and `data-preview-link="false"` to customise each link
+           // individually
+           previewLinks: {preview_links},
+
+           // Exposes the reveal.js API through window.postMessage
+           postMessage: {post_message},
+
+           // Dispatches all reveal.js events to the parent window through postMessage
+           postMessageEvents: {post_message_events},
+
+           // Focuses body when page changes visibility to ensure keyboard shortcuts work
+           focusBodyOnPageVisibilityChange: {focus_body_on_page_visibility_change},
+
+           // Transition style
+           transition: {transition}, // none/fade/slide/convex/concave/zoom
+
+           // Transition speed
+           transitionSpeed: {transition_speed}, // default/fast/slow
+
+           // Transition style for full page slide backgrounds
+           backgroundTransition: {background_transition}, // none/fade/slide/convex/concave/zoom
+
+           // The maximum number of pages a single slide can expand onto when printing
+           // to PDF, unlimited by default
+           pdfMaxPagesPerSlide: {pdf_max_pages_per_slide},
+
+           // Prints each fragment on a separate slide
+           pdfSeparateFragments: {pdf_separate_fragments},
+
+           // Offset used to reduce the height of content within exported PDF pages.
+           // This exists to account for environment differences based on how you
+           // print to PDF. CLI printing options, like phantomjs and wkpdf, can end
+           // on precisely the total height of the document whereas in-browser
+           // printing has to end one pixel before.
+           pdfPageHeightOffset: {pdf_page_height_offset},
+
+           // Number of slides away from the current that are visible
+           viewDistance: {view_distance},
+
+           // Number of slides away from the current that are visible on mobile
+           // devices. It is advisable to set this to a lower number than
+           // viewDistance in order to save resources.
+           mobileViewDistance: {mobile_view_distance},
+
+           // The display mode that will be used to show slides
+           display: {display},
+
+           // Hide cursor if inactive
+           hideInactiveCursor: {hide_inactive_cursor},
+
+           // Time before the cursor is hidden (in ms)
+           hideCursorTime: {hide_cursor_time}
+        }});
+
+        {data_uri_fix}
+    </script>
+  </body>
 
 </html>

manim_slides/defaults.py

@@ -1,2 +1,5 @@
-FOLDER_PATH: str = "./slides"
-CONFIG_PATH: str = ".manim-slides.json"
+from pathlib import Path
+
+FOLDER_PATH: Path = Path("./slides")
+CONFIG_PATH: Path = Path(".manim-slides.toml")
+FFMPEG_BIN: Path = Path("ffmpeg")

manim_slides/docs/manim_slides_directive.py

@@ -0,0 +1,426 @@
+# type: ignore
+r"""
+A directive for including Manim slides in a Sphinx document
+===========================================================
+
+.. warning::
+
+    This Sphinx extension requires Manim to be installed,
+    and won't probably work on ManimGL examples.
+
+.. note::
+
+    The current implementation is highly inspired from Manim's own
+    sphinx directive, from v0.17.3.
+
+When rendering the HTML documentation, the ``.. manim-slides::``
+directive implemented here allows to include rendered videos.
+
+This directive requires three additional dependencies:
+``manim``, ``docutils`` and ``jinja2``. The last two are usually bundled
+with Sphinx.
+You can install them manually, or with the extra keyword:
+
+    pip install manim-slides[sphinx-directive]
+
+Note that you will still need to install Manim's platform-specific dependencies,
+see
+`their installation page <https://docs.manim.community/en/stable/installation.html>`_.
+
+Usage
+-----
+
+First, you must include the directive in the Sphinx configuration file:
+
+.. code-block:: python
+    :caption: Sphinx configuration file (usually :code:`docs/source/conf.py`).
+    :emphasize-lines: 3
+
+    extensions = [
+        # ...
+        "manim_slides.docs.manim_slides_directive",
+    ]
+
+Its basic usage that allows processing **inline content**
+looks as follows::
+
+    .. manim-slides:: MySlide
+        from manim import *
+        from manim_slides import Slide
+
+        class MySlide(Slide):
+            def construct(self):
+                ...
+
+It is required to pass the name of the class representing the
+scene to be rendered to the directive.
+
+As a second application, the directive can also be used to
+render scenes that are defined within doctests, for example::
+
+    .. manim-slides:: DirectiveDoctestExample
+        :ref_classes: Dot
+
+        >>> from manim import Create, Dot, RED
+        >>> from manim_slides import Slide
+        >>> dot = Dot(color=RED)
+        >>> dot.color
+        <Color #fc6255>
+        >>> class DirectiveDoctestExample(Slide):
+        ...     def construct(self):
+        ...         self.play(Create(dot))
+
+Options
+-------
+
+Options can be passed as follows::
+
+    .. manim-slides:: <Class name>
+        :<option name>: <value>
+
+The following configuration options are supported by the
+directive:
+
+    hide_source
+        If this flag is present without argument,
+        the source code is not displayed above the rendered video.
+
+    quality : {'low', 'medium', 'high', 'fourk'}
+        Controls render quality of the video, in analogy to
+        the corresponding command line flags.
+
+    ref_classes
+        A list of classes, separated by spaces, that is
+        rendered in a reference block after the source code.
+
+    ref_functions
+        A list of functions, separated by spaces,
+        that is rendered in a reference block after the source code.
+
+    ref_methods
+        A list of methods, separated by spaces,
+        that is rendered in a reference block after the source code.
+
+"""
+from __future__ import annotations
+
+import csv
+import itertools as it
+import re
+import sys
+from pathlib import Path
+from timeit import timeit
+
+import jinja2
+from docutils import nodes
+from docutils.parsers.rst import Directive, directives
+from docutils.statemachine import StringList
+from manim import QUALITIES
+
+from ..convert import RevealJS
+from ..present import get_scenes_presentation_config
+
+classnamedict = {}
+
+
+class SkipManimNode(nodes.Admonition, nodes.Element):
+    """Auxiliary node class that is used when the ``skip-manim-slides`` tag is
+    present or ``.pot`` files are being built.
+
+    Skips rendering the manim-slides directive and outputs a placeholder instead.
+    """
+
+    pass
+
+
+def visit(self, node, name=""):
+    self.visit_admonition(node, name)
+    if not isinstance(node[0], nodes.title):
+        node.insert(0, nodes.title("skip-manim-slides", "Example Placeholder"))
+
+
+def depart(self, node):
+    self.depart_admonition(node)
+
+
+def process_name_list(option_input: str, reference_type: str) -> list[str]:
+    r"""Reformats a string of space separated class names
+    as a list of strings containing valid Sphinx references.
+
+    Tests
+    -----
+
+    ::
+
+        >>> process_name_list("Tex TexTemplate", "class")
+        [':class:`~.Tex`', ':class:`~.TexTemplate`']
+        >>> process_name_list("Scene.play Mobject.rotate", "func")
+        [':func:`~.Scene.play`', ':func:`~.Mobject.rotate`']
+    """
+    return [f":{reference_type}:`~.{name}`" for name in option_input.split()]
+
+
+class ManimSlidesDirective(Directive):
+    r"""The manim-slides directive, rendering videos while building
+    the documentation.
+
+    See the module docstring for documentation.
+    """
+    has_content = True
+    required_arguments = 1
+    optional_arguments = 0
+    option_spec = {
+        "hide_source": bool,
+        "quality": lambda arg: directives.choice(
+            arg,
+            ("low", "medium", "high", "fourk"),
+        ),
+        "ref_modules": lambda arg: process_name_list(arg, "mod"),
+        "ref_classes": lambda arg: process_name_list(arg, "class"),
+        "ref_functions": lambda arg: process_name_list(arg, "func"),
+        "ref_methods": lambda arg: process_name_list(arg, "meth"),
+    }
+    final_argument_whitespace = True
+
+    def run(self):
+        # Rendering is skipped if the tag skip-manim is present,
+        # or if we are making the pot-files
+        should_skip = (
+            "skip-manim-slides"
+            in self.state.document.settings.env.app.builder.tags.tags
+            or self.state.document.settings.env.app.builder.name == "gettext"
+        )
+        if should_skip:
+            node = SkipManimNode()
+            self.state.nested_parse(
+                StringList(
+                    [
+                        f"Placeholder block for ``{self.arguments[0]}``.",
+                        "",
+                        ".. code-block:: python",
+                        "",
+                    ]
+                    + ["    " + line for line in self.content]
+                ),
+                self.content_offset,
+                node,
+            )
+            return [node]
+
+        from manim import config, tempconfig
+
+        global classnamedict
+
+        clsname = self.arguments[0]
+        if clsname not in classnamedict:
+            classnamedict[clsname] = 1
+        else:
+            classnamedict[clsname] += 1
+
+        hide_source = "hide_source" in self.options
+
+        ref_content = (
+            self.options.get("ref_modules", [])
+            + self.options.get("ref_classes", [])
+            + self.options.get("ref_functions", [])
+            + self.options.get("ref_methods", [])
+        )
+        if ref_content:
+            ref_block = "References: " + " ".join(ref_content)
+
+        else:
+            ref_block = ""
+
+        if "quality" in self.options:
+            quality = f'{self.options["quality"]}_quality'
+        else:
+            quality = "example_quality"
+        frame_rate = QUALITIES[quality]["frame_rate"]
+        pixel_height = QUALITIES[quality]["pixel_height"]
+        pixel_width = QUALITIES[quality]["pixel_width"]
+
+        state_machine = self.state_machine
+        document = state_machine.document
+
+        source_file_name = Path(document.attributes["source"])
+        source_rel_name = source_file_name.relative_to(setup.confdir)
+        source_rel_dir = source_rel_name.parents[0]
+        dest_dir = Path(setup.app.builder.outdir, source_rel_dir).absolute()
+        if not dest_dir.exists():
+            dest_dir.mkdir(parents=True, exist_ok=True)
+
+        source_block = [
+            ".. code-block:: python",
+            "",
+            *("    " + line for line in self.content),
+        ]
+        source_block = "\n".join(source_block)
+
+        config.media_dir = (Path(setup.confdir) / "media").absolute()
+        config.images_dir = "{media_dir}/images"
+        config.video_dir = "{media_dir}/videos/{quality}"
+        output_file = f"{clsname}-{classnamedict[clsname]}"
+        config.assets_dir = Path("_static")
+        config.progress_bar = "none"
+        config.verbosity = "WARNING"
+
+        example_config = {
+            "frame_rate": frame_rate,
+            "pixel_height": pixel_height,
+            "pixel_width": pixel_width,
+            "output_file": output_file,
+        }
+
+        user_code = self.content
+        if user_code[0].startswith(">>> "):  # check whether block comes from doctest
+            user_code = [
+                line[4:] for line in user_code if line.startswith((">>> ", "... "))
+            ]
+
+        code = [
+            "from manim import *",
+            *user_code,
+            f"{clsname}().render()",
+        ]
+
+        try:
+            with tempconfig(example_config):
+                run_time = timeit(lambda: exec("\n".join(code), globals()), number=1)
+                video_dir = config.get_dir("video_dir")
+        except Exception as e:
+            raise RuntimeError(f"Error while rendering example {clsname}") from e
+
+        _write_rendering_stats(
+            clsname,
+            run_time,
+            self.state.document.settings.env.docname,
+        )
+
+        # copy video file to output directory
+        filename = f"{output_file}.html"
+        filesrc = video_dir / filename
+        destfile = Path(dest_dir, filename)
+        presentation_configs = get_scenes_presentation_config(
+            [clsname], Path("./slides")
+        )
+        RevealJS(presentation_configs=presentation_configs, controls="true").convert_to(
+            destfile
+        )
+        # shutil.copyfile(filesrc, destfile)
+
+        print("CLASS NAME:", clsname)
+
+        rendered_template = jinja2.Template(TEMPLATE).render(
+            clsname=clsname,
+            clsname_lowercase=clsname.lower(),
+            hide_source=hide_source,
+            filesrc_rel=Path(filesrc).relative_to(setup.confdir).as_posix(),
+            output_file=output_file,
+            source_block=source_block,
+            ref_block=ref_block,
+        )
+        state_machine.insert_input(
+            rendered_template.split("\n"),
+            source=document.attributes["source"],
+        )
+
+        return []
+
+
+rendering_times_file_path = Path("../rendering_times.csv")
+
+
+def _write_rendering_stats(scene_name, run_time, file_name):
+    with rendering_times_file_path.open("a") as file:
+        csv.writer(file).writerow(
+            [
+                re.sub(r"^(reference\/)|(manim\.)", "", file_name),
+                scene_name,
+                "%.3f" % run_time,
+            ],
+        )
+
+
+def _log_rendering_times(*args):
+    if rendering_times_file_path.exists():
+        with rendering_times_file_path.open() as file:
+            data = list(csv.reader(file))
+        if len(data) == 0:
+            sys.exit()
+
+        print("\nRendering Summary\n-----------------\n")
+
+        max_file_length = max(len(row[0]) for row in data)
+        for key, group in it.groupby(data, key=lambda row: row[0]):
+            key = key.ljust(max_file_length + 1, ".")
+            group = list(group)
+            if len(group) == 1:
+                row = group[0]
+                print(f"{key}{row[2].rjust(7, '.')}s {row[1]}")
+                continue
+            time_sum = sum(float(row[2]) for row in group)
+            print(
+                f"{key}{f'{time_sum:.3f}'.rjust(7, '.')}s  => {len(group)} EXAMPLES",
+            )
+            for row in group:
+                print(f"{' '*(max_file_length)} {row[2].rjust(7)}s {row[1]}")
+        print("")
+
+
+def _delete_rendering_times(*args):
+    if rendering_times_file_path.exists():
+        rendering_times_file_path.unlink()
+
+
+def setup(app):
+    app.add_node(SkipManimNode, html=(visit, depart))
+
+    setup.app = app
+    setup.config = app.config
+    setup.confdir = app.confdir
+
+    app.add_directive("manim-slides", ManimSlidesDirective)
+
+    app.connect("builder-inited", _delete_rendering_times)
+    app.connect("build-finished", _log_rendering_times)
+
+    metadata = {"parallel_read_safe": False, "parallel_write_safe": True}
+    return metadata
+
+
+TEMPLATE = r"""
+{% if not hide_source %}
+.. raw:: html
+
+    <div id="{{ clsname_lowercase }}" class="admonition admonition-manim-example">
+    <p class="admonition-title">Example: {{ clsname }} <a class="headerlink" href="#{{ clsname_lowercase }}">¶</a></p>
+
+{% endif %}
+
+
+.. raw:: html
+
+
+    <div style="position:relative;padding-bottom:56.25%;">
+        <iframe
+            style="width:100%;height:100%;position:absolute;left:0px;top:0px;"
+            frameborder="0"
+            width="100%"
+            height="100%"
+            allowfullscreen
+            allow="autoplay"
+            src="./{{ output_file }}.html">
+        </iframe>
+    </div>
+
+{% if not hide_source %}
+{{ source_block }}
+
+{{ ref_block }}
+
+.. raw:: html
+
+    </div>
+
+{% endif %}
+"""

manim_slides/ipython/ipython_magic.py

@@ -0,0 +1,265 @@
+"""
+Utilities for using Manim Slides with IPython (in particular: Jupyter notebooks).
+=================================================================================
+
+.. toctree::
+    :hidden:
+
+    magic_example
+
+
+.. note::
+
+    The current implementation is highly inspired from Manim's own
+    IPython magics, from v0.17.3.
+
+This magic requires two additional dependencies: ``manim`` and ``IPython``.
+You can install them manually, or with the extra keyword:
+
+    pip install manim-slides[magic]
+
+Note that you will still need to install Manim's platform-specific dependencies,
+see
+`their installation page <https://docs.manim.community/en/stable/installation.html>`_.
+"""
+
+from __future__ import annotations
+
+import logging
+import mimetypes
+import shutil
+from datetime import datetime
+from pathlib import Path
+from typing import Any, Dict, Optional
+
+from IPython import get_ipython
+from IPython.core.interactiveshell import InteractiveShell
+from IPython.core.magic import Magics, line_cell_magic, magics_class, needs_local_scope
+from IPython.display import HTML, display
+from manim import config, logger, tempconfig
+from manim.__main__ import main
+from manim.constants import RendererType
+from manim.renderer.shader import shader_program_cache
+
+from ..convert import RevealJS
+from ..present import get_scenes_presentation_config
+
+
+@magics_class
+class ManimSlidesMagic(Magics):  # type: ignore
+    def __init__(self, shell: InteractiveShell) -> None:
+        super().__init__(shell)
+        self.rendered_files: Dict[Path, Path] = {}
+
+    @needs_local_scope
+    @line_cell_magic
+    def manim_slides(
+        self,
+        line: str,
+        cell: Optional[str] = None,
+        local_ns: Dict[str, Any] = {},
+    ) -> None:
+        r"""Render Manim Slides contained in IPython cells.
+        Works as a line or cell magic.
+
+        .. note::
+
+            This magic works pretty much like the one from Manim, except that it
+            will render Manim Slides using RevealJS. For passing arguments to
+            Manim Slides' convert module, use ``-manim-slides key=value``.
+
+            Everything that is after ``--manim-slides`` will be send to
+            Manim Slides' command. E.g., use ``--manim-slides controls=true``
+            to display control buttons.
+
+        .. hint::
+
+            This line and cell magic works best when used in a JupyterLab
+            environment: while all of the functionality is available for
+            classic Jupyter notebooks as well, it is possible that videos
+            sometimes don't update on repeated execution of the same cell
+            if the scene name stays the same.
+
+            This problem does not occur when using JupyterLab.
+
+        Please refer to `<https://jupyter.org/>`_ for more information about JupyterLab
+        and Jupyter notebooks.
+
+        Usage in line mode::
+
+            %manim_slides [CLI options] MyAwesomeSlide
+
+        Usage in cell mode::
+
+            %%manim_slides [CLI options] MyAwesomeSlide
+
+            class MyAweseomeSlide(Slide):
+                def construct(self):
+                    ...
+
+        Run ``%manim_slides --help`` and ``%manim_slides render --help``
+        for possible command line interface options.
+
+        .. note::
+
+            The maximal width of the rendered videos that are displayed in the notebook can be
+            configured via the ``media_width`` configuration option. The default is set to ``25vw``,
+            which is 25% of your current viewport width. To allow the output to become as large
+            as possible, set ``config.media_width = "100%"``.
+
+            The ``media_embed`` option will embed the image/video output in the notebook. This is
+            generally undesirable as it makes the notebooks very large, but is required on some
+            platforms (notably Google's CoLab, where it is automatically enabled unless suppressed
+            by ``config.embed = False``) and needed in cases when the notebook (or converted HTML
+            file) will be moved relative to the video locations. Use-cases include building
+            documentation with Sphinx and JupyterBook. See also the
+            :mod:`Manim Slides directive for Sphinx
+            <manim_slides.docs.manim_slides_directive>`.
+
+        Examples
+        --------
+
+        First make sure to put ``from manim_slides import ManimSlidesMagic``,
+        or even ``from manim_slides import *``
+        in a cell and evaluate it. Then, a typical Jupyter notebook cell for Manim Slides
+        could look as follows::
+
+            %%manim_slides -v WARNING --progress_bar None MySlide --manim-slides controls=true data_uri=true
+
+            class MySlide(Slide):
+                def construct(self):
+                    square = Square()
+                    circle = Circle()
+
+                    self.play(Create(square))
+                    self.next_slide()
+                    self.play(Transform(square, circle))
+
+        Evaluating this cell will render and display the ``MySlide`` slide
+        defined in the body of the cell.
+
+        .. note::
+
+            In case you want to hide the red box containing the output progress bar, the ``progress_bar`` config
+            option should be set to ``None``. This can also be done by passing ``--progress_bar None`` as a
+            CLI flag.
+
+        """
+        if cell:
+            exec(cell, local_ns)
+
+        split_args = line.split("--manim-slides", 2)
+        manim_args = split_args[0].split()
+
+        if len(split_args) == 2:
+            manim_slides_args = split_args[1].split()
+        else:
+            manim_slides_args = []
+
+        args = manim_args
+        if not len(args) or "-h" in args or "--help" in args or "--version" in args:
+            main(args, standalone_mode=False, prog_name="manim")
+            return
+
+        modified_args = self.add_additional_args(args)
+        args = main(modified_args, standalone_mode=False, prog_name="manim")
+        with tempconfig(local_ns.get("config", {})):
+            config.digest_args(args)
+            logging.getLogger("manim-slides").setLevel(logging.getLogger("manim").level)
+
+            renderer = None
+            if config.renderer == RendererType.OPENGL:
+                from manim.renderer.opengl_renderer import OpenGLRenderer
+
+                renderer = OpenGLRenderer()
+
+            try:
+                SceneClass = local_ns[config["scene_names"][0]]
+                scene = SceneClass(renderer=renderer)
+                scene.render()
+            finally:
+                # Shader cache becomes invalid as the context is destroyed
+                shader_program_cache.clear()
+
+                # Close OpenGL window here instead of waiting for the main thread to
+                # finish causing the window to stay open and freeze
+                if renderer is not None and renderer.window is not None:
+                    renderer.window.close()
+
+            if config["output_file"] is None:
+                logger.info("No output file produced")
+                return
+
+            local_path = Path(config["output_file"]).relative_to(Path.cwd())
+            tmpfile = (
+                Path(config["media_dir"]) / "jupyter" / f"{_generate_file_name()}.html"
+            )
+
+            if local_path in self.rendered_files:
+                self.rendered_files[local_path].unlink()
+                pass
+            self.rendered_files[local_path] = tmpfile
+            tmpfile.parent.mkdir(parents=True, exist_ok=True)
+            shutil.copy(local_path, tmpfile)
+
+            file_type = mimetypes.guess_type(config["output_file"])[0] or "video/mp4"
+            embed = config["media_embed"]
+            if embed is None:
+                # videos need to be embedded when running in google colab.
+                # do this automatically in case config.media_embed has not been
+                # set explicitly.
+                embed = "google.colab" in str(get_ipython())
+
+            if not file_type.startswith("video"):
+                raise ValueError(
+                    f"Manim Slides only supports video files, not {file_type}"
+                )
+
+            clsname = config["scene_names"][0]
+
+            kwargs = dict(arg.split("=", 1) for arg in manim_slides_args)
+
+            if embed:  # Embedding implies data-uri
+                kwargs["data_uri"] = "true"
+
+            # TODO: FIXME
+            # Seems like files are blocked so date-uri is the only working option...
+            if kwargs.get("data_uri", "false").lower().strip() == "false":
+                logger.warn(
+                    "data_uri option is currently automatically enabled, "
+                    "because using local video files does not seem to work properly."
+                )
+                kwargs["data_uri"] = "true"
+
+            presentation_configs = get_scenes_presentation_config(
+                [clsname], Path("./slides")
+            )
+            RevealJS(presentation_configs=presentation_configs, **kwargs).convert_to(
+                tmpfile
+            )
+
+            if embed:
+                result = HTML(
+                    """<div style="position:relative;padding-bottom:56.25%;"><iframe style="width:100%;height:100%;position:absolute;left:0px;top:0px;" frameborder="0" width="100%" height="100%" allowfullscreen allow="autoplay" srcdoc="{srcdoc}"></iframe></div>""".format(
+                        srcdoc=tmpfile.read_text().replace('"', "'")
+                    )
+                )
+            else:
+                result = HTML(
+                    """<div style="position:relative;padding-bottom:56.25%;"><iframe style="width:100%;height:100%;position:absolute;left:0px;top:0px;" frameborder="0" width="100%" height="100%" allowfullscreen allow="autoplay" src="{src}"></iframe></div>""".format(
+                        src=tmpfile.as_posix()
+                    )
+                )
+
+            display(result)
+
+    def add_additional_args(self, args: list[str]) -> list[str]:
+        additional_args = ["--jupyter"]
+        # Use webm to support transparency
+        if "-t" in args and "--format" not in args:
+            additional_args += ["--format", "webm"]
+        return additional_args + args[:-1] + [""] + [args[-1]]
+
+
+def _generate_file_name() -> str:
+    return config["scene_names"][0] + "@" + datetime.now().strftime("%Y-%m-%d@%H-%M-%S")  # type: ignore

manim_slides/logger.py

@@ -0,0 +1,49 @@
+"""
+Logger utils, mostly copied from Manim Community:
+https://github.com/ManimCommunity/manim/blob/d5b65b844b8ce8ff5151a2f56f9dc98cebbc1db4/manim/_config/logger_utils.py#L29-L101
+"""
+
+import logging
+
+from rich.console import Console
+from rich.logging import RichHandler
+from rich.theme import Theme
+
+__all__ = ["logger", "make_logger"]
+
+HIGHLIGHTED_KEYWORDS = [  # these keywords are highlighted specially
+    "Played",
+    "animations",
+    "scene",
+    "Reading",
+    "Writing",
+    "script",
+    "arguments",
+    "Invalid",
+    "Aborting",
+    "module",
+    "File",
+    "Rendering",
+    "Rendered",
+    "Pressed key",
+]
+
+
+def make_logger() -> logging.Logger:
+    """
+    Make a logger similar to the one used by Manim.
+    """
+    RichHandler.KEYWORDS = HIGHLIGHTED_KEYWORDS
+    rich_handler = RichHandler(
+        show_time=True,
+        console=Console(theme=Theme({"logging.level.perf": "magenta"})),
+    )
+    logging.addLevelName(5, "PERF")
+    logger = logging.getLogger("manim-slides")
+    logger.setLevel(logging.getLogger("manim").level)
+    logger.addHandler(rich_handler)
+
+    return logger
+
+
+logger = logging.getLogger("manim-slides")

manim_slides/manim.py

@@ -1,10 +1,10 @@
-import os
 import sys
-from contextlib import contextmanager
 from importlib.util import find_spec
-from typing import Iterator
 
 __all__ = [
+    # Constants
+    "FFMPEG_BIN",
+    "LEFT",
     "MANIM",
     "MANIM_PACKAGE_NAME",
     "MANIM_AVAILABLE",
@@ -13,25 +13,19 @@ __all__ = [
     "MANIMGL_PACKAGE_NAME",
     "MANIMGL_AVAILABLE",
     "MANIMGL_IMPORTED",
-    "logger",
+    # Classes
+    "AnimationGroup",
+    "FadeIn",
+    "FadeOut",
+    "Mobject",
     "Scene",
     "ThreeDScene",
+    # Objects
+    "logger",
     "config",
-    "FFMPEG_BIN",
 ]
 
 
-@contextmanager
-def suppress_stdout() -> Iterator[None]:
-    with open(os.devnull, "w") as devnull:
-        old_stdout = sys.stdout
-        sys.stdout = devnull
-        try:
-            yield
-        finally:
-            sys.stdout = old_stdout
-
-
 MANIM_PACKAGE_NAME = "manim"
 MANIM_AVAILABLE = find_spec(MANIM_PACKAGE_NAME) is not None
 MANIM_IMPORTED = MANIM_PACKAGE_NAME in sys.modules
@@ -43,8 +37,8 @@ MANIMGL_IMPORTED = MANIMGL_PACKAGE_NAME in sys.modules
 if MANIM_IMPORTED and MANIMGL_IMPORTED:
     from manim import logger
 
-    logger.warn(
-        "Both manim and manimgl are installed, therefore `manim-slide` needs to need which one to use. Please only import one of the two modules so that `manim-slide` knows which one to use. Here, manim is used by default"
+    logger.warning(
+        "Both manim and manimgl are imported, therefore `manim-slide` needs to know which one to use. Please only import one of the two modules so that `manim-slide` knows which one to use. Here, manim is used by default"
     )
     MANIM = True
     MANIMGL = False
@@ -67,15 +61,33 @@ else:
 
 
 if MANIMGL:
-    from manimlib import Scene, ThreeDScene, config
+    from manimlib import (
+        LEFT,
+        AnimationGroup,
+        FadeIn,
+        FadeOut,
+        Mobject,
+        Scene,
+        ThreeDScene,
+        config,
+    )
     from manimlib.constants import FFMPEG_BIN
     from manimlib.logger import log as logger
 
 else:
-    with suppress_stdout():  # Avoids printing "Manim Community v..."
-        from manim import Scene, ThreeDScene, config, logger
+    from manim import (
+        LEFT,
+        AnimationGroup,
+        FadeIn,
+        FadeOut,
+        Mobject,
+        Scene,
+        ThreeDScene,
+        config,
+        logger,
+    )
 
-        try:  # For manim<v0.16.0.post0
-            from manim.constants import FFMPEG_BIN
-        except ImportError:
-            FFMPEG_BIN = config.ffmpeg_executable
+    try:  # For manim<v0.16.0.post0
+        from manim.constants import FFMPEG_BIN
+    except ImportError:
+        FFMPEG_BIN = config.ffmpeg_executable

manim_slides/present.py

@@ -1,23 +1,35 @@
 import os
 import platform
+import signal
 import sys
 import time
-from enum import IntEnum, auto, unique
+from enum import Enum, IntFlag, auto, unique
+from pathlib import Path
 from typing import Any, Dict, List, Optional, Tuple, Union
 
 import click
 import cv2
 import numpy as np
+from click import Context, Parameter
 from pydantic import ValidationError
+from pydantic_extra_types.color import Color
 from PySide6.QtCore import Qt, QThread, Signal, Slot
-from PySide6.QtGui import QCloseEvent, QIcon, QImage, QKeyEvent, QPixmap, QResizeEvent
+from PySide6.QtGui import (
+    QCloseEvent,
+    QIcon,
+    QImage,
+    QKeyEvent,
+    QPixmap,
+    QResizeEvent,
+    QScreen,
+)
 from PySide6.QtWidgets import QApplication, QGridLayout, QLabel, QWidget
 from tqdm import tqdm
 
 from .commons import config_path_option, verbosity_option
 from .config import DEFAULT_CONFIG, Config, PresentationConfig, SlideConfig
 from .defaults import FOLDER_PATH
-from .manim import logger
+from .logger import logger
 from .resources import *  # noqa: F401, F403
 
 os.environ.pop(
@@ -28,9 +40,17 @@ WINDOW_NAME = "Manim Slides"
 WINDOW_INFO_NAME = f"{WINDOW_NAME}: Info"
 WINDOWS = platform.system() == "Windows"
 
+
+class AspectRatio(Enum):
+    ignore = Qt.IgnoreAspectRatio
+    keep = Qt.KeepAspectRatio
+    auto = "auto"
+
+
 ASPECT_RATIO_MODES = {
-    "ignore": Qt.IgnoreAspectRatio,
-    "keep": Qt.KeepAspectRatio,
+    "ignore": AspectRatio.ignore,
+    "keep": AspectRatio.keep,
+    "auto": AspectRatio.auto,
 }
 
 RESIZE_MODES = {
@@ -40,16 +60,20 @@ RESIZE_MODES = {
 
 
 @unique
-class State(IntEnum):
+class State(IntFlag):
     """Represents all possible states of a slide presentation."""
 
+    """A video is actively being played."""
     PLAYING = auto()
+    """A video was manually paused."""
     PAUSED = auto()
+    """Waiting for user to press next (or else)."""
     WAIT = auto()
+    """Presentation was terminated."""
     END = auto()
 
     def __str__(self) -> str:
-        return self.name.capitalize()
+        return self.name.capitalize()  # type: ignore
 
 
 def now() -> float:
@@ -61,12 +85,11 @@ class Presentation:
     """Creates presentation from a configuration object."""
 
     def __init__(self, config: PresentationConfig) -> None:
-        self.slides: List[SlideConfig] = config.slides
-        self.files: List[str] = config.files
+        self.config = config
 
-        self.current_slide_index: int = 0
+        self.__current_slide_index: int = 0
         self.current_animation: int = self.current_slide.start_animation
-        self.current_file: str = ""
+        self.current_file: Path = Path("")
 
         self.loaded_animation_cap: int = -1
         self.cap = None  # cap = cv2.VideoCapture
@@ -78,6 +101,71 @@ class Presentation:
 
         self.reset()
 
+    def __len__(self) -> int:
+        return len(self.slides)
+
+    @property
+    def slides(self) -> List[SlideConfig]:
+        """Returns the list of slides."""
+        return self.config.slides
+
+    @property
+    def files(self) -> List[Path]:
+        """Returns the list of animation files."""
+        return self.config.files
+
+    @property
+    def resolution(self) -> Tuple[int, int]:
+        """Returns the resolution."""
+        return self.config.resolution
+
+    @property
+    def background_color(self) -> Color:
+        """Returns the background color."""
+        return self.config.background_color
+
+    @property
+    def current_slide_index(self) -> int:
+        return self.__current_slide_index
+
+    @current_slide_index.setter
+    def current_slide_index(self, value: Optional[int]) -> None:
+        if value is not None:
+            if -len(self) <= value < len(self):
+                self.__current_slide_index = value
+                self.current_animation = self.current_slide.start_animation
+                logger.debug(f"Set current slide index to {value}")
+            else:
+                logger.error(
+                    f"Could not load slide number {value}, playing first slide instead."
+                )
+
+    def set_current_animation_and_update_slide_number(
+        self, value: Optional[int]
+    ) -> None:
+        if value is not None:
+            n_files = len(self.files)
+            if -n_files <= value < n_files:
+                if value < 0:
+                    value += n_files
+
+                for i, slide in enumerate(self.slides):
+                    if value < slide.end_animation:
+                        self.current_slide_index = i
+                        self.current_animation = value
+
+                        logger.debug(f"Playing animation {value}, at slide index {i}")
+                        return
+
+                assert (
+                    False
+                ), f"An error occurred when setting the current animation to {value}, please create an issue on GitHub!"
+
+            else:
+                logger.error(
+                    f"Could not load animation number {value}, playing first animation instead."
+                )
+
     @property
     def current_slide(self) -> SlideConfig:
         """Returns currently playing slide."""
@@ -106,20 +194,19 @@ class Presentation:
         if (self.loaded_animation_cap != animation) or (
             self.reverse and self.reversed_animation != animation
         ):  # cap already loaded
-
             logger.debug(f"Loading new cap for animation #{animation}")
 
             self.release_cap()
 
-            file: str = self.files[animation]
+            file: Path = self.files[animation]
 
             if self.reverse:
-                file = "{}_reversed{}".format(*os.path.splitext(file))
+                file = file.parent / f"{file.stem}_reversed{file.suffix}"
                 self.reversed_animation = animation
 
             self.current_file = file
 
-            self.cap = cv2.VideoCapture(file)
+            self.cap = cv2.VideoCapture(str(file))
             self.loaded_animation_cap = animation
 
     @property
@@ -130,7 +217,9 @@ class Presentation:
 
     def rewind_current_slide(self) -> None:
         """Rewinds current slide to first frame."""
-        logger.debug("Rewinding curring slide")
+        logger.debug("Rewinding current slide")
+        self.current_slide.terminated = False
+
         if self.reverse:
             self.current_animation = self.current_slide.end_animation - 1
         else:
@@ -168,9 +257,10 @@ class Presentation:
 
     def load_previous_slide(self) -> None:
         """Loads previous slide."""
-        logger.debug("Loading previous slide")
+        logger.debug(f"Loading previous slide, current is {self.current_slide_index}")
         self.cancel_reverse()
         self.current_slide_index = max(0, self.current_slide_index - 1)
+        logger.debug(f"Loading slide index {self.current_slide_index}")
         self.rewind_current_slide()
 
     @property
@@ -181,7 +271,8 @@ class Presentation:
             logger.warn(
                 f"Something is wrong with video file {self.current_file}, as the fps returned by frame {self.current_frame_number} is 0"
             )
-        return max(fps, 1)  # TODO: understand why we sometimes get 0 fps
+        # TODO: understand why we sometimes get 0 fps
+        return max(fps, 1)  # type: ignore
 
     def reset(self) -> None:
         """Rests current presentation."""
@@ -192,10 +283,10 @@ class Presentation:
 
     def load_last_slide(self) -> None:
         """Loads last slide."""
-        self.current_slide_index = len(self.slides) - 2
+        self.current_slide_index = len(self.slides) - 1
         assert (
             self.current_slide_index >= 0
-        ), "Slides should be at list of a least two elements"
+        ), "Slides should be at list of a least one element"
         self.current_animation = self.current_slide.start_animation
         self.load_animation_cap(self.current_animation)
         self.slides[-1].terminated = False
@@ -209,7 +300,7 @@ class Presentation:
             return self.current_animation + 1
 
     @property
-    def is_last_animation(self) -> int:
+    def is_last_animation(self) -> bool:
         """Returns True if current animation is the last one of current slide."""
         if self.reverse:
             return self.current_animation == self.current_slide.start_animation
@@ -228,41 +319,37 @@ class Presentation:
         It does this by reading the video information and checking if the state is still correct.
         It returns the frame to show (lastframe) and the new state.
         """
-        if state == State.PAUSED:
+        if state ^ State.PLAYING:  # If not playing, we return the same
             if self.lastframe is None:
                 _, self.lastframe = self.current_cap.read()
             return self.lastframe, state
+
         still_playing, frame = self.current_cap.read()
+
         if still_playing:
             self.lastframe = frame
-        elif state == state.WAIT or state == state.PAUSED:  # type: ignore
-            return self.lastframe, state
-        elif self.current_slide.is_last() and self.current_slide.terminated:
-            return self.lastframe, State.END
-        else:  # not still playing
-            if self.is_last_animation:
-                if self.current_slide.is_slide():
+            return self.lastframe, State.PLAYING
+
+        # Video was terminated
+        if self.is_last_animation:
+            if self.current_slide.is_loop():
+                if self.reverse:
                     state = State.WAIT
-                elif self.current_slide.is_loop():
-                    if self.reverse:
-                        state = State.WAIT
-                    else:
-                        self.current_animation = self.current_slide.start_animation
-                        state = State.PLAYING
-                        self.rewind_current_slide()
-                elif self.current_slide.is_last():
-                    self.current_slide.terminated = True
-            elif (
-                self.current_slide.is_last()
-                and self.current_slide.end_animation == self.current_animation
-            ):
-                state = State.WAIT
+
+                else:
+                    self.current_animation = self.current_slide.start_animation
+                    state = State.PLAYING
+                    self.rewind_current_slide()
+            elif self.current_slide.is_last():
+                state = State.END
             else:
-                # Play next video!
-                self.current_animation = self.next_animation
-                self.load_animation_cap(self.current_animation)
-                # Reset video to position zero if it has been played before
-                self.current_cap.set(cv2.CAP_PROP_POS_FRAMES, 0)
+                state = State.WAIT
+        else:
+            # Play next video!
+            self.current_animation = self.next_animation
+            self.load_animation_cap(self.current_animation)
+            # Reset video to position zero if it has been played before
+            self.current_cap.set(cv2.CAP_PROP_POS_FRAMES, 0)
 
         return self.lastframe, state
 
@@ -272,16 +359,20 @@ class Display(QThread):  # type: ignore
 
     change_video_signal = Signal(np.ndarray)
     change_info_signal = Signal(dict)
+    change_presentation_signal = Signal()
     finished = Signal()
 
     def __init__(
         self,
-        presentations: List[PresentationConfig],
+        presentations: List[Presentation],
         config: Config = DEFAULT_CONFIG,
         start_paused: bool = False,
         skip_all: bool = False,
         record_to: Optional[str] = None,
         exit_after_last_slide: bool = False,
+        start_at_scene_number: Optional[int] = None,
+        start_at_slide_number: Optional[int] = None,
+        start_at_animation_number: Optional[int] = None,
     ) -> None:
         super().__init__()
         self.presentations = presentations
@@ -289,21 +380,66 @@ class Display(QThread):  # type: ignore
         self.config = config
         self.skip_all = skip_all
         self.record_to = record_to
-        self.recordings: List[Tuple[str, int, int]] = []
+        self.recordings: List[Tuple[Path, int, int]] = []
 
         self.state = State.PLAYING
         self.lastframe: Optional[np.ndarray] = None
-        self.current_presentation_index = 0
+
+        self.__current_presentation_index = 0
+        self.current_presentation_index = start_at_scene_number  # type: ignore
+        self.current_presentation.current_slide_index = start_at_slide_number  # type: ignore
+        self.current_presentation.set_current_animation_and_update_slide_number(
+            start_at_animation_number
+        )
+
         self.run_flag = True
 
         self.key = -1
         self.exit_after_last_slide = exit_after_last_slide
 
+    def __len__(self) -> int:
+        return len(self.presentations)
+
+    @property
+    def current_presentation_index(self) -> int:
+        return self.__current_presentation_index
+
+    @current_presentation_index.setter
+    def current_presentation_index(self, value: Optional[int]) -> None:
+        if value is not None:
+            if -len(self) <= value < len(self):
+                self.__current_presentation_index = value
+                self.current_presentation.release_cap()
+                self.change_presentation_signal.emit()
+            else:
+                logger.error(
+                    f"Could not load scene number {value}, playing first scene instead."
+                )
+
     @property
     def current_presentation(self) -> Presentation:
         """Returns the current presentation."""
         return self.presentations[self.current_presentation_index]
 
+    @property
+    def current_resolution(self) -> Tuple[int, int]:
+        """Returns the resolution of the current presentation."""
+        return self.current_presentation.resolution
+
+    @property
+    def current_background_color(self) -> Color:
+        """Returns the background color of the current presentation."""
+        return self.current_presentation.background_color
+
+    @property
+    def is_last_presentation(self) -> bool:
+        """Returns True if current presentation is the last one."""
+        return self.current_presentation_index == len(self) - 1
+
+    def start(self) -> None:
+        super().start()
+        self.change_presentation_signal.emit()
+
     def run(self) -> None:
         """Runs a series of presentations until end or exit."""
         while self.run_flag:
@@ -311,18 +447,15 @@ class Display(QThread):  # type: ignore
             self.lastframe, self.state = self.current_presentation.update_state(
                 self.state
             )
-            if self.state == State.PLAYING or self.state == State.PAUSED:
+            if self.state & (State.PLAYING | State.PAUSED):
                 if self.start_paused:
                     self.state = State.PAUSED
                     self.start_paused = False
-            if self.state == State.END:
+            if self.state & State.END:
                 if self.current_presentation_index == len(self.presentations) - 1:
                     if self.exit_after_last_slide:
                         self.run_flag = False
                         continue
-                else:
-                    self.current_presentation_index += 1
-                    self.state = State.PLAYING
 
             self.handle_key()
             self.show_video()
@@ -330,6 +463,21 @@ class Display(QThread):  # type: ignore
 
             lag = now() - last_time
             sleep_time = 1 / self.current_presentation.fps
+
+            logger.log(
+                5,
+                f"Took {lag:.3f} seconds to process the current frame, that must play at a rate of one every {sleep_time:.3f} seconds.",
+            )
+
+            if sleep_time - lag < 0:
+                logger.warn(
+                    "The FPS rate could not be matched. "
+                    "This is normal when manually transitioning between slides.\n"
+                    "If you feel that the FPS are too low, "
+                    "consider checking this issue:\n"
+                    "https://github.com/jeertmans/manim-slides/issues/179."
+                )
+
             sleep_time = max(sleep_time - lag, 0)
             time.sleep(sleep_time)
             last_time = now()
@@ -338,7 +486,7 @@ class Display(QThread):  # type: ignore
         if self.record_to is not None:
             self.record_movie()
 
-        logger.debug("Closing video thread gracully and exiting")
+        logger.debug("Closing video thread gracefully and exiting")
         self.finished.emit()
 
     def record_movie(self) -> None:
@@ -347,7 +495,7 @@ class Display(QThread):  # type: ignore
         )
         file, frame_number, fps = self.recordings[0]
 
-        cap = cv2.VideoCapture(file)
+        cap = cv2.VideoCapture(str(file))
         cap.set(cv2.CAP_PROP_POS_FRAMES, frame_number - 1)
         _, frame = cap.read()
 
@@ -363,7 +511,7 @@ class Display(QThread):  # type: ignore
             if file != _file:
                 cap.release()
                 file = _file
-                cap = cv2.VideoCapture(_file)
+                cap = cv2.VideoCapture(str(_file))
 
             cap.set(cv2.CAP_PROP_POS_FRAMES, frame_number - 1)
             _, frame = cap.read()
@@ -406,37 +554,43 @@ class Display(QThread):  # type: ignore
         """Handles key strokes."""
 
         key = self.key
+        keys = self.config.keys
 
-        if self.config.QUIT.match(key):
+        if keys.QUIT.match(key):
             self.run_flag = False
-        elif self.state == State.PLAYING and self.config.PLAY_PAUSE.match(key):
+        elif self.state == State.PLAYING and keys.PLAY_PAUSE.match(key):
             self.state = State.PAUSED
-        elif self.state == State.PAUSED and self.config.PLAY_PAUSE.match(key):
+        elif self.state == State.PAUSED and keys.PLAY_PAUSE.match(key):
             self.state = State.PLAYING
-        elif self.state == State.WAIT and (
-            self.config.CONTINUE.match(key) or self.config.PLAY_PAUSE.match(key)
+        elif self.state & (State.END | State.WAIT) and (
+            keys.CONTINUE.match(key) or keys.PLAY_PAUSE.match(key) or self.skip_all
         ):
-            self.current_presentation.load_next_slide()
+            if (self.state & State.END) and not self.is_last_presentation:
+                self.current_presentation_index += 1
+                self.current_presentation.rewind_current_slide()
+            else:
+                self.current_presentation.load_next_slide()
             self.state = State.PLAYING
         elif (
-            self.state == State.PLAYING and self.config.CONTINUE.match(key)
+            self.state == State.PLAYING and keys.CONTINUE.match(key)
         ) or self.skip_all:
             self.current_presentation.load_next_slide()
-        elif self.config.BACK.match(key):
+        elif keys.BACK.match(key):
             if self.current_presentation.current_slide_index == 0:
                 if self.current_presentation_index == 0:
                     self.current_presentation.load_previous_slide()
                 else:
+                    self.current_presentation.cancel_reverse()
                     self.current_presentation_index -= 1
                     self.current_presentation.load_last_slide()
                 self.state = State.PLAYING
             else:
                 self.current_presentation.load_previous_slide()
                 self.state = State.PLAYING
-        elif self.config.REVERSE.match(key):
+        elif keys.REVERSE.match(key):
             self.current_presentation.reverse_current_slide()
             self.state = State.PLAYING
-        elif self.config.REWIND.match(key):
+        elif keys.REWIND.match(key):
             self.current_presentation.cancel_reverse()
             self.current_presentation.rewind_current_slide()
             self.state = State.PLAYING
@@ -512,19 +666,28 @@ class App(QWidget):  # type: ignore
         *args: Any,
         config: Config = DEFAULT_CONFIG,
         fullscreen: bool = False,
-        resolution: Tuple[int, int] = (1980, 1080),
         hide_mouse: bool = False,
-        aspect_ratio: Qt.AspectRatioMode = Qt.IgnoreAspectRatio,
+        aspect_ratio: AspectRatio = AspectRatio.auto,
         resize_mode: Qt.TransformationMode = Qt.SmoothTransformation,
         background_color: str = "black",
+        screen: Optional[QScreen] = None,
         **kwargs: Any,
     ):
         super().__init__()
 
+        if screen:
+            self.setScreen(screen)
+            self.move(screen.geometry().topLeft())
+
         self.setWindowTitle(WINDOW_NAME)
         self.icon = QIcon(":/icon.png")
         self.setWindowIcon(self.icon)
-        self.display_width, self.display_height = resolution
+
+        # create the video capture thread
+        kwargs["config"] = config
+        self.thread = Display(*args, **kwargs)
+
+        self.display_width, self.display_height = self.thread.current_resolution
         self.aspect_ratio = aspect_ratio
         self.resize_mode = resize_mode
         self.hide_mouse = hide_mouse
@@ -533,17 +696,15 @@ class App(QWidget):  # type: ignore
             self.setCursor(Qt.BlankCursor)
 
         self.label = QLabel(self)
+
+        if self.aspect_ratio == AspectRatio.auto:
+            self.label.setScaledContents(True)
         self.label.setAlignment(Qt.AlignCenter)
-        self.label.resize(self.display_width, self.display_height)
-        self.label.setStyleSheet(f"background-color: {background_color}")
 
         self.pixmap = QPixmap(self.width(), self.height())
         self.label.setPixmap(self.pixmap)
         self.label.setMinimumSize(1, 1)
 
-        # create the video capture thread
-        kwargs["config"] = config
-        self.thread = Display(*args, **kwargs)
         # create the info dialog
         self.info = Info()
         self.info.show()
@@ -553,10 +714,13 @@ class App(QWidget):  # type: ignore
 
         if fullscreen:
             self.showFullScreen()
+        else:
+            self.resize(self.display_width, self.display_height)
 
         # connect signals
         self.thread.change_video_signal.connect(self.update_image)
         self.thread.change_info_signal.connect(self.info.update_info)
+        self.thread.change_presentation_signal.connect(self.update_canvas)
         self.thread.finished.connect(self.closeAll)
         self.send_key_signal.connect(self.thread.set_key)
 
@@ -564,9 +728,8 @@ class App(QWidget):  # type: ignore
         self.thread.start()
 
     def keyPressEvent(self, event: QKeyEvent) -> None:
-
         key = event.key()
-        if self.config.HIDE_MOUSE.match(key):
+        if self.config.keys.HIDE_MOUSE.match(key):
             if self.hide_mouse:
                 self.setCursor(Qt.ArrowCursor)
                 self.hide_mouse = False
@@ -584,10 +747,11 @@ class App(QWidget):  # type: ignore
         self.deleteLater()
 
     def resizeEvent(self, event: QResizeEvent) -> None:
-        self.pixmap = self.pixmap.scaled(
-            self.width(), self.height(), self.aspect_ratio, self.resize_mode
-        )
-        self.label.setPixmap(self.pixmap)
+        if not self.label.hasScaledContents():
+            self.pixmap = self.pixmap.scaled(
+                self.width(), self.height(), self.aspect_ratio.value, self.resize_mode
+            )
+            self.label.setPixmap(self.pixmap)
         self.label.resize(self.width(), self.height())
 
     def closeEvent(self, event: QCloseEvent) -> None:
@@ -601,54 +765,71 @@ class App(QWidget):  # type: ignore
         bytes_per_line = ch * w
         qt_img = QImage(cv_img.data, w, h, bytes_per_line, QImage.Format_BGR888)
 
-        if w != self.width() or h != self.height():
+        if not self.label.hasScaledContents() and (
+            w != self.width() or h != self.height()
+        ):
             qt_img = qt_img.scaled(
-                self.width(), self.height(), self.aspect_ratio, self.resize_mode
+                self.width(), self.height(), self.aspect_ratio.value, self.resize_mode
             )
 
         self.label.setPixmap(QPixmap.fromImage(qt_img))
 
+    @Slot()
+    def update_canvas(self) -> None:
+        """Update the canvas when a presentation has changed."""
+        logger.debug("Updating canvas")
+        w, h = self.thread.current_resolution
+
+        if not self.isFullScreen() and (
+            self.display_width != w or self.display_height != h
+        ):
+            self.display_width, self.display_height = w, h
+            self.resize(self.display_width, self.display_height)
+        self.label.setStyleSheet(
+            f"background-color: {self.thread.current_background_color}"
+        )
+
 
 @click.command()
 @click.option(
     "--folder",
     metavar="DIRECTORY",
     default=FOLDER_PATH,
-    type=click.Path(exists=True, file_okay=False),
+    type=click.Path(exists=True, file_okay=False, path_type=Path),
     help="Set slides folder.",
     show_default=True,
 )
 @click.help_option("-h", "--help")
 @verbosity_option
-def list_scenes(folder: str) -> None:
+def list_scenes(folder: Path) -> None:
     """List available scenes."""
 
     for i, scene in enumerate(_list_scenes(folder), start=1):
         click.secho(f"{i}: {scene}", fg="green")
 
 
-def _list_scenes(folder: str) -> List[str]:
+def _list_scenes(folder: Path) -> List[str]:
     """Lists available scenes in given directory."""
     scenes = []
 
-    for file in os.listdir(folder):
-        if file.endswith(".json"):
-            filepath = os.path.join(folder, file)
-            try:
-                _ = PresentationConfig.parse_file(filepath)
-                scenes.append(os.path.basename(file)[:-5])
-            except Exception as e:  # Could not parse this file as a proper presentation config
-                logger.warn(
-                    f"Something went wrong with parsing presentation config `{filepath}`: {e}"
-                )
-                pass
+    for filepath in folder.glob("*.json"):
+        try:
+            _ = PresentationConfig.from_file(filepath)
+            scenes.append(filepath.stem)
+        except (
+            Exception
+        ) as e:  # Could not parse this file as a proper presentation config
+            logger.warn(
+                f"Something went wrong with parsing presentation config `{filepath}`: {e}"
+            )
+            pass
 
     logger.debug(f"Found {len(scenes)} valid scene configuration files in `{folder}`.")
 
     return scenes
 
 
-def prompt_for_scenes(folder: str) -> List[str]:
+def prompt_for_scenes(folder: Path) -> List[str]:
     """Prompts the user to select scenes within a given folder."""
 
     scene_choices = dict(enumerate(_list_scenes(folder), start=1))
@@ -677,13 +858,13 @@ def prompt_for_scenes(folder: str) -> List[str]:
     while True:
         try:
             scenes = click.prompt("Choice(s)", value_proc=value_proc)
-            return scenes
+            return scenes  # type: ignore
         except ValueError as e:
             raise click.UsageError(str(e))
 
 
 def get_scenes_presentation_config(
-    scenes: List[str], folder: str
+    scenes: List[str], folder: Path
 ) -> List[PresentationConfig]:
     """Returns a list of presentation configurations based on the user input."""
 
@@ -692,19 +873,50 @@ def get_scenes_presentation_config(
 
     presentation_configs = []
     for scene in scenes:
-        config_file = os.path.join(folder, f"{scene}.json")
-        if not os.path.exists(config_file):
+        config_file = folder / f"{scene}.json"
+        if not config_file.exists():
             raise click.UsageError(
                 f"File {config_file} does not exist, check the scene name and make sure to use Slide as your scene base class"
             )
         try:
-            presentation_configs.append(PresentationConfig.parse_file(config_file))
+            presentation_configs.append(PresentationConfig.from_file(config_file))
         except ValidationError as e:
             raise click.UsageError(str(e))
 
     return presentation_configs
 
 
+def start_at_callback(
+    ctx: Context, param: Parameter, values: str
+) -> Tuple[Optional[int], ...]:
+    if values == "(None, None, None)":
+        return (None, None, None)
+
+    def str_to_int_or_none(value: str) -> Optional[int]:
+        if value.lower().strip() == "":
+            return None
+        else:
+            try:
+                return int(value)
+            except ValueError:
+                raise click.BadParameter(
+                    f"start index can only be an integer or an empty string, not `{value}`",
+                    ctx=ctx,
+                    param=param,
+                )
+
+    values_tuple = values.split(",")
+    n_values = len(values_tuple)
+    if n_values == 3:
+        return tuple(map(str_to_int_or_none, values_tuple))
+
+    raise click.BadParameter(
+        f"exactly 3 arguments are expected but you gave {n_values}, please use commas to separate them",
+        ctx=ctx,
+        param=param,
+    )
+
+
 @click.command()
 @click.argument("scenes", nargs=-1)
 @config_path_option
@@ -712,7 +924,7 @@ def get_scenes_presentation_config(
     "--folder",
     metavar="DIRECTORY",
     default=FOLDER_PATH,
-    type=click.Path(exists=True, file_okay=False),
+    type=click.Path(exists=True, file_okay=False, path_type=Path),
     help="Set slides folder.",
     show_default=True,
 )
@@ -722,23 +934,22 @@ def get_scenes_presentation_config(
     "-s",
     "--skip-all",
     is_flag=True,
-    help="Skip all slides, useful the test if slides are working. Automatically sets `--skip-after-last-slide` to True.",
+    help="Skip all slides, useful the test if slides are working. Automatically sets `--exit-after-last-slide` to True.",
 )
 @click.option(
     "-r",
     "--resolution",
     metavar="<WIDTH HEIGHT>",
     type=(int, int),
-    default=(1920, 1080),
+    default=None,
     help="Window resolution WIDTH HEIGHT used if fullscreen is not set. You may manually resize the window afterward.",
-    show_default=True,
 )
 @click.option(
     "--to",
     "--record-to",
     "record_to",
     metavar="FILE",
-    type=click.Path(dir_okay=False),
+    type=click.Path(dir_okay=False, path_type=Path),
     default=None,
     help="If set, the presentation will be recorded into a AVI video file with given name.",
 )
@@ -755,8 +966,8 @@ def get_scenes_presentation_config(
 @click.option(
     "--aspect-ratio",
     type=click.Choice(ASPECT_RATIO_MODES.keys(), case_sensitive=False),
-    default="ignore",
-    help="Set the aspect ratio mode to be used when rescaling video.",
+    default="auto",
+    help="Set the aspect ratio mode to be used when rescaling video. `'auto'` option is equivalent to `'ignore'`, but can be much faster due to not calling `scaled()` method on every frame.",
     show_default=True,
 )
 @click.option(
@@ -772,26 +983,76 @@ def get_scenes_presentation_config(
     "background_color",
     metavar="COLOR",
     type=str,
-    default="black",
-    help='Set the background color for borders when using "keep" resize mode. Can be any valid CSS color, e.g., "green", "#FF6500" or "rgba(255, 255, 0, .5)".',
+    default=None,
+    help='Set the background color for borders when using "keep" resize mode. Can be any valid CSS color, e.g., "green", "#FF6500" or "rgba(255, 255, 0, .5)". If not set, it defaults to the background color configured in the Manim scene.',
     show_default=True,
 )
+@click.option(
+    "--sa",
+    "--start-at",
+    "start_at",
+    metavar="<SCENE,SLIDE,ANIMATION>",
+    type=str,
+    callback=start_at_callback,
+    default=(None, None, None),
+    help="Start presenting at (x, y, z), equivalent to --sacn x --sasn y --saan z, and overrides values if not None.",
+)
+@click.option(
+    "--sacn",
+    "--start-at-scene-number",
+    "start_at_scene_number",
+    metavar="INDEX",
+    type=int,
+    default=None,
+    help="Start presenting at a given scene number (0 is first, -1 is last).",
+)
+@click.option(
+    "--sasn",
+    "--start-at-slide-number",
+    "start_at_slide_number",
+    metavar="INDEX",
+    type=int,
+    default=None,
+    help="Start presenting at a given slide number (0 is first, -1 is last).",
+)
+@click.option(
+    "--saan",
+    "--start-at-animation-number",
+    "start_at_animation_number",
+    metavar="INDEX",
+    type=int,
+    default=0,
+    help="Start presenting at a given animation number (0 is first, -1 is last). This conflicts with slide number since animation number is absolute to the presentation.",
+)
+@click.option(
+    "--screen",
+    "screen_number",
+    metavar="NUMBER",
+    type=int,
+    default=None,
+    help="Presents content on the given screen (a.k.a. display).",
+)
 @click.help_option("-h", "--help")
 @verbosity_option
 def present(
     scenes: List[str],
-    config_path: str,
-    folder: str,
+    config_path: Path,
+    folder: Path,
     start_paused: bool,
     fullscreen: bool,
     skip_all: bool,
-    resolution: Tuple[int, int],
-    record_to: Optional[str],
+    resolution: Optional[Tuple[int, int]],
+    record_to: Optional[Path],
     exit_after_last_slide: bool,
     hide_mouse: bool,
     aspect_ratio: str,
     resize_mode: str,
-    background_color: str,
+    background_color: Optional[str],
+    start_at: Tuple[Optional[int], Optional[int], Optional[int]],
+    start_at_scene_number: Optional[int],
+    start_at_slide_number: Optional[int],
+    start_at_animation_number: Optional[int],
+    screen_number: Optional[int] = None,
 ) -> None:
     """
     Present SCENE(s), one at a time, in order.
@@ -806,14 +1067,33 @@ def present(
     if skip_all:
         exit_after_last_slide = True
 
+    presentation_configs = get_scenes_presentation_config(scenes, folder)
+
+    if resolution is not None:
+        for presentation_config in presentation_configs:
+            presentation_config.resolution = resolution
+
+    if background_color is not None:
+        for presentation_config in presentation_configs:
+            presentation_config.background_color = background_color
+
     presentations = [
         Presentation(presentation_config)
-        for presentation_config in get_scenes_presentation_config(scenes, folder)
+        for presentation_config in presentation_configs
     ]
 
-    if os.path.exists(config_path):
+    # TODO: remove me in v5
+    if config_path.suffix == ".json" or Path(".manim-slides.json").exists():
+        logger.warn(
+            "Manim Slides now uses a TOML file for configuration. "
+            "Please create a new configuration file with `manim-slides init` "
+            "and move all the keys from your old config, if needed. "
+            "Then, delete your old JSON config file."
+        )
+
+    if config_path.exists():
         try:
-            config = Config.parse_file(config_path)
+            config = Config.from_file(config_path)
         except ValidationError as e:
             raise click.UsageError(str(e))
     else:
@@ -821,28 +1101,70 @@ def present(
         config = Config()
 
     if record_to is not None:
-        _, ext = os.path.splitext(record_to)
+        ext = record_to.suffix
         if ext.lower() != ".avi":
             raise click.UsageError(
-                "Recording only support '.avi' extension. For other video formats, please convert the resulting '.avi' file afterwards."
+                "Recording only support '.avi' extension. "
+                "For other video formats, "
+                "please convert the resulting '.avi' file afterwards."
             )
 
-    app = QApplication(sys.argv)
+    if start_at[0]:
+        start_at_scene_number = start_at[0]
+
+    if start_at[1]:
+        start_at_slide_number = start_at[1]
+
+    if start_at[2]:
+        start_at_animation_number = start_at[2]
+
+    if not QApplication.instance():
+        app = QApplication(sys.argv)
+    else:
+        app = QApplication.instance()
+
     app.setApplicationName("Manim Slides")
+
+    if screen_number is not None:
+        try:
+            screen = app.screens()[screen_number]
+        except IndexError:
+            logger.error(
+                f"Invalid screen number {screen_number}, "
+                f"allowed values are from 0 to {len(app.screens())-1} (incl.)"
+            )
+            screen = None
+    else:
+        screen = None
+
     a = App(
         presentations,
         config=config,
         start_paused=start_paused,
         fullscreen=fullscreen,
         skip_all=skip_all,
-        resolution=resolution,
         record_to=record_to,
         exit_after_last_slide=exit_after_last_slide,
         hide_mouse=hide_mouse,
         aspect_ratio=ASPECT_RATIO_MODES[aspect_ratio],
         resize_mode=RESIZE_MODES[resize_mode],
-        background_color=background_color,
+        start_at_scene_number=start_at_scene_number,
+        start_at_slide_number=start_at_slide_number,
+        start_at_animation_number=start_at_animation_number,
+        screen=screen,
     )
+
     a.show()
+
+    # inform about CTRL+C
+    def sigkill_handler(signum, frame):  # type: ignore
+        logger.warn(
+            "Thie application cannot be closed with usual CTRL+C, "
+            "please use the appropriate key defined in your config "
+            "(default: q)."
+        )
+
+        raise KeyboardInterrupt
+
+    signal.signal(signal.SIGINT, sigkill_handler)
     sys.exit(app.exec_())
-    logger.debug("After")

manim_slides/slide.py

@@ -1,19 +1,42 @@
-import os
 import platform
 import shutil
 import subprocess
-from typing import Any, List, Optional
+from pathlib import Path
+from typing import (
+    Any,
+    List,
+    Mapping,
+    MutableMapping,
+    Optional,
+    Sequence,
+    Tuple,
+    ValuesView,
+)
+from warnings import warn
 
+import numpy as np
 from tqdm import tqdm
 
 from .config import PresentationConfig, SlideConfig, SlideType
 from .defaults import FOLDER_PATH
-from .manim import FFMPEG_BIN, MANIMGL, Scene, ThreeDScene, config, logger
+from .manim import (
+    FFMPEG_BIN,
+    LEFT,
+    MANIMGL,
+    AnimationGroup,
+    FadeIn,
+    FadeOut,
+    Mobject,
+    Scene,
+    ThreeDScene,
+    config,
+    logger,
+)
 
 
-def reverse_video_file(src: str, dst: str) -> None:
+def reverse_video_file(src: Path, dst: Path) -> None:
     """Reverses a video file, writting the result to `dst`."""
-    command = [FFMPEG_BIN, "-i", src, "-vf", "reverse", dst]
+    command = [str(FFMPEG_BIN), "-y", "-i", str(src), "-vf", "reverse", str(dst)]
     logger.debug(" ".join(command))
     process = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
     output, error = process.communicate()
@@ -27,15 +50,14 @@ def reverse_video_file(src: str, dst: str) -> None:
 
 class Slide(Scene):  # type:ignore
     """
-    Inherits from `manim.Scene` or `manimlib.Scene` and provide necessary tools for slides rendering.
+    Inherits from :class:`Scene<manim.scene.scene.Scene>` and provide necessary tools for slides rendering.
     """
 
     def __init__(
-        self, *args: Any, output_folder: str = FOLDER_PATH, **kwargs: Any
+        self, *args: Any, output_folder: Path = FOLDER_PATH, **kwargs: Any
     ) -> None:
         if MANIMGL:
-            if not os.path.isdir("videos"):
-                os.mkdir("videos")
+            Path("videos").mkdir(exist_ok=True)
             kwargs["file_writer_config"] = {
                 "break_into_partial_movies": True,
                 "output_directory": "",
@@ -46,15 +68,49 @@ class Slide(Scene):  # type:ignore
 
         super().__init__(*args, **kwargs)
 
-        self.output_folder = output_folder
-        self.slides: List[SlideConfig] = []
-        self.current_slide = 1
-        self.current_animation = 0
-        self.loop_start_animation: Optional[int] = None
-        self.pause_start_animation = 0
+        self.__output_folder: Path = output_folder
+        self.__slides: List[SlideConfig] = []
+        self.__current_slide = 1
+        self.__current_animation = 0
+        self.__loop_start_animation: Optional[int] = None
+        self.__pause_start_animation = 0
+        self.__canvas: MutableMapping[str, Mobject] = {}
+        self.__wait_time_between_slides = 0.0
 
     @property
-    def partial_movie_files(self) -> List[str]:
+    def __frame_height(self) -> float:
+        """Returns the scene's frame height."""
+        if MANIMGL:
+            return self.frame_height  # type: ignore
+        else:
+            return config["frame_height"]  # type: ignore
+
+    @property
+    def __frame_width(self) -> float:
+        """Returns the scene's frame width."""
+        if MANIMGL:
+            return self.frame_width  # type: ignore
+        else:
+            return config["frame_width"]  # type: ignore
+
+    @property
+    def __background_color(self) -> str:
+        """Returns the scene's background color."""
+        if MANIMGL:
+            return self.camera_config["background_color"].hex  # type: ignore
+        else:
+            return config["background_color"].hex  # type: ignore
+
+    @property
+    def __resolution(self) -> Tuple[int, int]:
+        """Returns the scene's resolution used during rendering."""
+        if MANIMGL:
+            return self.camera_config["pixel_width"], self.camera_config["pixel_height"]
+        else:
+            return config["pixel_width"], config["pixel_height"]
+
+    @property
+    def __partial_movie_files(self) -> List[Path]:
         """Returns a list of partial movie files, a.k.a animations."""
         if MANIMGL:
             from manimlib.utils.file_ops import get_sorted_integer_files
@@ -63,155 +119,432 @@ class Slide(Scene):  # type:ignore
                 "remove_non_integer_files": True,
                 "extension": self.file_writer.movie_file_extension,
             }
-            return get_sorted_integer_files(
+            files = get_sorted_integer_files(
                 self.file_writer.partial_movie_directory, **kwargs
             )
         else:
-            return self.renderer.file_writer.partial_movie_files
+            files = self.renderer.file_writer.partial_movie_files
+
+        return [Path(file) for file in files]
 
     @property
-    def show_progress_bar(self) -> bool:
+    def __show_progress_bar(self) -> bool:
         """Returns True if progress bar should be displayed."""
         if MANIMGL:
-            return getattr(super(Scene, self), "show_progress_bar", True)
+            return getattr(self, "show_progress_bar", True)
         else:
-            return config["progress_bar"] != "none"
+            return config["progress_bar"] != "none"  # type: ignore
 
     @property
-    def leave_progress_bar(self) -> bool:
+    def __leave_progress_bar(self) -> bool:
         """Returns True if progress bar should be left after completed."""
         if MANIMGL:
-            return getattr(super(Scene, self), "leave_progress_bars", False)
+            return getattr(self, "leave_progress_bars", False)
         else:
-            return config["progress_bar"] == "leave"
+            return config["progress_bar"] == "leave"  # type: ignore
+
+    @property
+    def __start_at_animation_number(self) -> Optional[int]:
+        if MANIMGL:
+            return getattr(self, "start_at_animation_number", None)
+        else:
+            return config["from_animation_number"]  # type: ignore
+
+    @property
+    def canvas(self) -> MutableMapping[str, Mobject]:
+        """
+        Returns the canvas associated to the current slide.
+
+        The canvas is a mapping between names and Mobjects,
+        for objects that are assumed to stay in multiple slides.
+
+        For example, a section title or a slide number.
+
+        Examples
+        --------
+
+        .. manim-slides:: CanvasExample
+
+            from manim import *
+            from manim_slides import Slide
+
+            class CanvasExample(Slide):
+                def update_canvas(self):
+                    self.counter += 1
+                    old_slide_number = self.canvas["slide_number"]
+                    new_slide_number = Text(f"{self.counter}").move_to(old_slide_number)
+                    self.play(Transform(old_slide_number, new_slide_number))
+
+                def construct(self):
+                    title = Text("My Title").to_corner(UL)
+
+                    self.counter = 1
+                    slide_number = Text("1").to_corner(DL)
+
+                    self.add_to_canvas(title=title, slide_number=slide_number)
+
+                    self.play(FadeIn(title), FadeIn(slide_number))
+                    self.next_slide()
+
+                    circle = Circle(radius=2)
+                    dot = Dot()
+
+                    self.update_canvas()
+                    self.play(Create(circle))
+                    self.play(MoveAlongPath(dot, circle))
+
+                    self.next_slide()
+                    self.update_canvas()
+
+                    square = Square()
+
+                    self.play(self.wipe(self.mobjects_without_canvas, square))
+                    self.next_slide()
+
+                    self.update_canvas()
+                    self.play(
+                        Transform(
+                            self.canvas["title"],
+                            Text("New Title").to_corner(UL)
+                        )
+                    )
+                    self.next_slide()
+
+                    self.remove_from_canvas("title", "slide_number")
+                    self.play(self.wipe(self.mobjects_without_canvas, []))
+
+        """
+        return self.__canvas
+
+    def add_to_canvas(self, **objects: Mobject) -> Mobject:
+        """
+        Adds objects to the canvas, using key values as names.
+
+        :param objects: A mapping between names and Mobjects.
+
+        .. note::
+
+            This method does not actually do anything in terms of
+            animations. You must still call :code:`self.add` or
+            play some animation that introduces each Mobject for
+            it to appear. The same applies when removing objects.
+        """
+        self.__canvas.update(objects)
+
+    def remove_from_canvas(self, *names: str) -> None:
+        """
+        Removes objects from the canvas.
+        """
+        for name in names:
+            self.__canvas.pop(name)
+
+    @property
+    def canvas_mobjects(self) -> ValuesView[Mobject]:
+        """
+        Returns Mobjects contained in the canvas.
+        """
+        return self.canvas.values()
+
+    @property
+    def mobjects_without_canvas(self) -> Sequence[Mobject]:
+        """
+        Returns the list of objects contained in the scene,
+        minus those present in the canvas.
+        """
+        return [
+            mobject for mobject in self.mobjects if mobject not in self.canvas_mobjects
+        ]
+
+    @property
+    def wait_time_between_slides(self) -> float:
+        r"""
+        Returns the wait duration (in seconds) added between two slides.
+
+        By default, this value is set to 0.
+
+        Setting this value to something bigger than 0 will result in a
+        :code:`self.wait` animation called at the end of every slide.
+
+        .. note::
+            This is useful because animations are usually only terminated
+            when a new animation is played. You can observe the small difference
+            in the examples below: the circle is not fully complete in the first
+            slide of the first example, but well in the second example.
+
+        Examples
+        --------
+
+        .. manim-slides:: WithoutWaitExample
+
+            from manim import *
+            from manim_slides import Slide
+
+            class WithoutWaitExample(Slide):
+                def construct(self):
+                    circle = Circle(radius=2)
+                    arrow = Arrow().next_to(circle, RIGHT).scale(-1)
+                    text = Text("Small\ngap").next_to(arrow, RIGHT)
+
+                    self.play(Create(arrow), FadeIn(text))
+                    self.play(Create(circle))
+                    self.next_slide()
+
+                    self.play(FadeOut(circle))
+
+        .. manim-slides:: WithWaitExample
+
+            from manim import *
+            from manim_slides import Slide
+
+            class WithWaitExample(Slide):
+                def construct(self):
+                    self.wait_time_between_slides = 0.1  # A small value > 1 / FPS
+                    circle = Circle(radius=2)
+                    arrow = Arrow().next_to(circle, RIGHT).scale(-1)
+                    text = Text("No more\ngap").next_to(arrow, RIGHT)
+
+                    self.play(Create(arrow), FadeIn(text))
+                    self.play(Create(circle))
+                    self.next_slide()
+
+                    self.play(FadeOut(circle))
+
+        """
+        return self.__wait_time_between_slides
+
+    @wait_time_between_slides.setter
+    def wait_time_between_slides(self, wait_time: float) -> None:
+        self.__wait_time_between_slides = max(wait_time, 0.0)
 
     def play(self, *args: Any, **kwargs: Any) -> None:
         """Overloads `self.play` and increment animation count."""
         super().play(*args, **kwargs)
-        self.current_animation += 1
+        self.__current_animation += 1
 
-    def pause(self) -> None:
-        """Creates a new slide with previous animations."""
-        self.slides.append(
+    def next_slide(self) -> None:
+        """
+        Creates a new slide with previous animations.
+
+        This usually means that the user will need to press some key before the
+        next slide is played. By default, this is the right arrow key.
+
+
+        .. note::
+
+            Calls to :func:`next_slide` at the very beginning or at the end are
+            not needed, since they are automatically added.
+
+        .. warning::
+
+            This is not allowed to call :func:`next_slide` inside a loop.
+
+        Examples
+        --------
+
+        The following contains 3 slides:
+
+        #. the first with nothing on it;
+        #. the second with "Hello World!" fading in;
+        #. and the last with the text fading out;
+
+        .. manim-slides:: NextSlideExample
+
+            from manim import *
+            from manim_slides import Slide
+
+            class NextSlideExample(Slide):
+                def construct(self):
+                    text = Text("Hello World!")
+
+                    self.play(FadeIn(text))
+
+                    self.next_slide()
+                    self.play(FadeOut(text))
+        """
+        assert (
+            self.__loop_start_animation is None
+        ), "You cannot call `self.next_slide()` inside a loop"
+
+        if self.wait_time_between_slides > 0.0:
+            self.wait(self.wait_time_between_slides)
+
+        self.__slides.append(
             SlideConfig(
                 type=SlideType.slide,
-                start_animation=self.pause_start_animation,
-                end_animation=self.current_animation,
-                number=self.current_slide,
+                start_animation=self.__pause_start_animation,
+                end_animation=self.__current_animation,
+                number=self.__current_slide,
             )
         )
-        self.current_slide += 1
-        self.pause_start_animation = self.current_animation
+        self.__current_slide += 1
+        self.__pause_start_animation = self.__current_animation
 
-    def add_last_slide(self) -> None:
+    def pause(self) -> None:
+        """
+        Creates a new slide with previous animations.
+
+        .. deprecated:: 4.10.0
+            Use :func:`next_slide` instead.
+        """
+        warn(
+            "`self.pause()` is deprecated. Use `self.next_slide()` instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        Slide.next_slide(self)
+
+    def __add_last_slide(self) -> None:
         """Adds a 'last' slide to the end of slides."""
-        self.slides.append(
+
+        if (
+            len(self.__slides) > 0
+            and self.__current_animation == self.__slides[-1].end_animation
+        ):
+            self.__slides[-1].type = SlideType.last
+            return
+
+        self.__slides.append(
             SlideConfig(
                 type=SlideType.last,
-                start_animation=self.pause_start_animation,
-                end_animation=self.current_animation,
-                number=self.current_slide,
+                start_animation=self.__pause_start_animation,
+                end_animation=self.__current_animation,
+                number=self.__current_slide,
             )
         )
 
     def start_loop(self) -> None:
-        """Starts a loop."""
-        assert self.loop_start_animation is None, "You cannot nest loops"
-        self.loop_start_animation = self.current_animation
+        """
+        Starts a loop. End it with :func:`end_loop`.
+
+        A loop will automatically replay the slide, i.e., everything between
+        :func:`start_loop` and :func:`end_loop`, upon reaching end.
+
+        .. warning::
+
+            When rendered with RevealJS, loops cannot be in the first nor
+            the last slide.
+
+        Examples
+        --------
+
+        The following contains one slide that will loop endlessly.
+
+        .. manim-slides:: LoopExample
+
+            from manim import *
+            from manim_slides import Slide
+
+            class LoopExample(Slide):
+                def construct(self):
+                    dot = Dot(color=BLUE, radius=1)
+
+                    self.play(FadeIn(dot))
+                    self.next_slide()
+
+                    self.start_loop()
+
+                    self.play(Indicate(dot, scale_factor=2))
+
+                    self.end_loop()
+
+                    self.play(FadeOut(dot))
+        """
+        assert self.__loop_start_animation is None, "You cannot nest loops"
+        self.__loop_start_animation = self.__current_animation
 
     def end_loop(self) -> None:
-        """Ends an existing loop."""
+        """Ends an existing loop. See :func:`start_loop` for more details."""
         assert (
-            self.loop_start_animation is not None
+            self.__loop_start_animation is not None
         ), "You have to start a loop before ending it"
-        self.slides.append(
+        self.__slides.append(
             SlideConfig(
                 type=SlideType.loop,
-                start_animation=self.loop_start_animation,
-                end_animation=self.current_animation,
-                number=self.current_slide,
+                start_animation=self.__loop_start_animation,
+                end_animation=self.__current_animation,
+                number=self.__current_slide,
             )
         )
-        self.current_slide += 1
-        self.loop_start_animation = None
-        self.pause_start_animation = self.current_animation
+        self.__current_slide += 1
+        self.__loop_start_animation = None
+        self.__pause_start_animation = self.__current_animation
 
-    def save_slides(self, use_cache: bool = True) -> None:
+    def __save_slides(self, use_cache: bool = True) -> None:
         """
         Saves slides, optionally using cached files.
 
         Note that cached files only work with Manim.
         """
-        self.add_last_slide()
+        self.__add_last_slide()
 
-        if not os.path.exists(self.output_folder):
-            os.mkdir(self.output_folder)
+        files_folder = self.__output_folder / "files"
 
-        files_folder = os.path.join(self.output_folder, "files")
-        if not os.path.exists(files_folder):
-            os.mkdir(files_folder)
+        scene_name = str(self)
+        scene_files_folder = files_folder / scene_name
 
-        scene_name = type(self).__name__
-        scene_files_folder = os.path.join(files_folder, scene_name)
-
-        old_animation_files = set()
-
-        if not os.path.exists(scene_files_folder):
-            os.mkdir(scene_files_folder)
-        elif not use_cache:
-            shutil.rmtree(scene_files_folder)
-            os.mkdir(scene_files_folder)
-        else:
-            old_animation_files.update(os.listdir(scene_files_folder))
+        scene_files_folder.mkdir(parents=True, exist_ok=True)
 
         files = []
         for src_file in tqdm(
-            self.partial_movie_files,
+            self.__partial_movie_files,
             desc=f"Copying animation files to '{scene_files_folder}' and generating reversed animations",
-            leave=self.leave_progress_bar,
+            leave=self.__leave_progress_bar,
             ascii=True if platform.system() == "Windows" else None,
-            disable=not self.show_progress_bar,
+            disable=not self.__show_progress_bar,
         ):
-            filename = os.path.basename(src_file)
-            rev_filename = "{}_reversed{}".format(*os.path.splitext(filename))
+            if src_file is None and not MANIMGL:
+                # This happens if rendering with -na,b (manim only)
+                # where animations not in [a,b] will be skipped
+                # but animations before a will have a None src_file
+                continue
+
+            dst_file = scene_files_folder / src_file.name
+            rev_file = scene_files_folder / f"{src_file.stem}_reversed{src_file.suffix}"
 
-            dst_file = os.path.join(scene_files_folder, filename)
             # We only copy animation if it was not present
-            if filename in old_animation_files:
-                old_animation_files.remove(filename)
-            else:
+            if not use_cache or not dst_file.exists():
                 shutil.copyfile(src_file, dst_file)
 
             # We only reverse video if it was not present
-            if rev_filename in old_animation_files:
-                old_animation_files.remove(rev_filename)
-            else:
-                rev_file = os.path.join(scene_files_folder, rev_filename)
+            if not use_cache or not rev_file.exists():
                 reverse_video_file(src_file, rev_file)
 
             files.append(dst_file)
 
+        if offset := self.__start_at_animation_number:
+            self.__slides = [
+                slide for slide in self.__slides if slide.end_animation > offset
+            ]
+
+            for slide in self.__slides:
+                slide.start_animation -= offset
+                slide.end_animation -= offset
+
         logger.info(
-            f"Copied {len(files)} animations to '{os.path.abspath(scene_files_folder)}' and generated reversed animations"
+            f"Copied {len(files)} animations to '{scene_files_folder.absolute()}' and generated reversed animations"
         )
 
-        slide_path = os.path.join(self.output_folder, "%s.json" % (scene_name,))
+        slide_path = self.__output_folder / f"{scene_name}.json"
 
-        with open(slide_path, "w") as f:
-            f.write(PresentationConfig(slides=self.slides, files=files).json(indent=2))
+        PresentationConfig(
+            slides=self.__slides,
+            files=files,
+            resolution=self.__resolution,
+            background_color=self.__background_color,
+        ).to_file(slide_path)
 
         logger.info(
-            f"Slide '{scene_name}' configuration written in '{os.path.abspath(slide_path)}'"
+            f"Slide '{scene_name}' configuration written in '{slide_path.absolute()}'"
         )
 
     def run(self, *args: Any, **kwargs: Any) -> None:
         """MANIMGL renderer"""
         super().run(*args, **kwargs)
-        self.save_slides(use_cache=False)
+        self.__save_slides(use_cache=False)
 
     def render(self, *args: Any, **kwargs: Any) -> None:
         """MANIM render"""
-        # We need to disable the caching limit since we rely on intermidiate files
+        # We need to disable the caching limit since we rely on intermediate files
         max_files_cached = config["max_files_cached"]
         config["max_files_cached"] = float("inf")
 
@@ -219,14 +552,187 @@ class Slide(Scene):  # type:ignore
 
         config["max_files_cached"] = max_files_cached
 
-        self.save_slides()
+        self.__save_slides()
+
+    def wipe(
+        self,
+        current: Sequence[Mobject] = [],
+        future: Sequence[Mobject] = [],
+        direction: np.ndarray = LEFT,
+        fade_in_kwargs: Mapping[str, Any] = {},
+        fade_out_kwargs: Mapping[str, Any] = {},
+        **kwargs: Any,
+    ) -> AnimationGroup:
+        """
+        Returns a wipe animation that will shift all the current objects outside
+        of the current scene's scope, and all the future objects inside.
+
+        :param current: A sequence of mobjects to remove from the scene.
+        :param future: A sequence of mobjects to add to the scene.
+        :param direction: The wipe direction.
+        :param fade_in_kwargs: Keyword arguments passed to
+            :class:`FadeIn<manim.animation.fading.FadeIn>`.
+        :param fade_out_kwargs: Keyword arguments passed to
+            :class:`FadeOut<manim.animation.fading.FadeOut>`.
+        :param kwargs: Keyword arguments passed to
+            :class:`AnimationGroup<manim.animation.composition.AnimationGroup>`.
+
+        Examples
+        --------
+
+        .. manim-slides:: WipeExample
+
+            from manim import *
+            from manim_slides import Slide
+
+            class WipeExample(Slide):
+                def construct(self):
+                    circle = Circle(radius=3, color=BLUE)
+                    square = Square()
+                    text = Text("This is a wipe example").next_to(square, DOWN)
+                    beautiful = Text("Beautiful, no?")
+
+                    self.play(FadeIn(circle))
+                    self.next_slide()
+
+                    self.play(self.wipe(circle, Group(square, text)))
+                    self.next_slide()
+
+                    self.play(self.wipe(Group(square, text), beautiful, direction=UP))
+                    self.next_slide()
+
+                    self.play(self.wipe(beautiful, circle, direction=DOWN + RIGHT))
+        """
+        shift_amount = np.asarray(direction) * np.array(
+            [self.__frame_width, self.__frame_height, 0.0]
+        )
+
+        animations = []
+
+        for mobject in future:
+            animations.append(FadeIn(mobject, shift=shift_amount, **fade_in_kwargs))
+
+        for mobject in current:
+            animations.append(FadeOut(mobject, shift=shift_amount, **fade_out_kwargs))
+
+        return AnimationGroup(*animations, **kwargs)
+
+    def zoom(
+        self,
+        current: Sequence[Mobject] = [],
+        future: Sequence[Mobject] = [],
+        scale: float = 4.0,
+        out: bool = False,
+        fade_in_kwargs: Mapping[str, Any] = {},
+        fade_out_kwargs: Mapping[str, Any] = {},
+        **kwargs: Any,
+    ) -> AnimationGroup:
+        """
+        Returns a zoom animation that will fade out all the current objects,
+        and fade in all the future objects. Objects are faded in a direction
+        that goes towards the camera.
+
+        :param current: A sequence of mobjects to remove from the scene.
+        :param future: A sequence of mobjects to add to the scene.
+        :param scale: How much the objects are scaled (up or down).
+        :param out: If set, the objects fade in the opposite direction.
+        :param fade_in_kwargs: Keyword arguments passed to
+            :class:`FadeIn<manim.animation.fading.FadeIn>`.
+        :param fade_out_kwargs: Keyword arguments passed to
+            :class:`FadeOut<manim.animation.fading.FadeOut>`.
+        :param kwargs: Keyword arguments passed to
+            :class:`AnimationGroup<manim.animation.composition.AnimationGroup>`.
+
+        Examples
+        --------
+
+        .. manim-slides:: ZoomExample
+
+            from manim import *
+            from manim_slides import Slide
+
+            class ZoomExample(Slide):
+                def construct(self):
+                    circle = Circle(radius=3, color=BLUE)
+                    square = Square()
+
+                    self.play(FadeIn(circle))
+                    self.next_slide()
+
+                    self.play(self.zoom(circle, square))
+                    self.next_slide()
+
+                    self.play(self.zoom(square, circle, out=True, scale=10.))
+        """
+        scale_in = 1.0 / scale
+        scale_out = scale
+
+        if out:
+            scale_in, scale_out = scale_out, scale_in
+
+        animations = []
+
+        for mobject in future:
+            animations.append(FadeIn(mobject, scale=scale_in, **fade_in_kwargs))
+
+        for mobject in current:
+            animations.append(FadeOut(mobject, scale=scale_out, **fade_out_kwargs))
+
+        return AnimationGroup(*animations, **kwargs)
 
 
 class ThreeDSlide(Slide, ThreeDScene):  # type: ignore
     """
-    Inherits from `manim.ThreeDScene` or `manimlib.ThreeDScene` and provide necessary tools for slides rendering.
+    Inherits from :class:`Slide` and :class:`ThreeDScene<manim.scene.three_d_scene.ThreeDScene>` and provide necessary tools for slides rendering.
 
-    Note that ManimGL does not need ThreeDScene for 3D rendering in recent versions, see `example.py`.
+    .. note:: ManimGL does not need ThreeDScene for 3D rendering in recent versions, see `example.py`.
+
+    Examples
+    --------
+
+    .. manim-slides:: ThreeDExample
+
+        from manim import *
+        from manim_slides import ThreeDSlide
+
+        class ThreeDExample(ThreeDSlide):
+            def construct(self):
+                title = Text("A 2D Text")
+
+                self.play(FadeIn(title))
+                self.next_slide()
+
+                sphere = Sphere([0, 0, -3])
+
+                self.move_camera(phi=PI/3, theta=-PI/4, distance=7)
+                self.play(
+                    GrowFromCenter(sphere),
+                    Transform(title, Text("A 3D Text"))
+                )
+                self.next_slide()
+
+                bye = Text("Bye!")
+
+                self.start_loop()
+                self.play(
+                    self.wipe(
+                        self.mobjects_without_canvas,
+                        [bye],
+                        direction=UP
+                    )
+                )
+                self.wait(.5)
+                self.play(
+                    self.wipe(
+                        self.mobjects_without_canvas,
+                        [title, sphere],
+                        direction=DOWN
+                    )
+                )
+                self.wait(.5)
+                self.end_loop()
+
+                self.play(*[FadeOut(mobject) for mobject in self.mobjects])
     """
 
     pass

manim_slides/wizard.py

@@ -1,6 +1,6 @@
-import os
 import sys
 from functools import partial
+from pathlib import Path
 from typing import Any
 
 import click
@@ -21,7 +21,7 @@ from PySide6.QtWidgets import (
 from .commons import config_options, verbosity_option
 from .config import Config, Key
 from .defaults import CONFIG_PATH
-from .manim import logger
+from .logger import logger
 from .resources import *  # noqa: F401, F403
 
 WINDOW_NAME: str = "Configuration Wizard"
@@ -51,7 +51,6 @@ class KeyInput(QDialog):  # type: ignore
 
 class Wizard(QWidget):  # type: ignore
     def __init__(self, config: Config):
-
         super().__init__()
 
         self.setWindowTitle(WINDOW_NAME)
@@ -69,7 +68,7 @@ class Wizard(QWidget):  # type: ignore
 
         self.layout = QGridLayout()
 
-        for i, (key, value) in enumerate(self.config.dict().items()):
+        for i, (key, value) in enumerate(self.config.keys.dict().items()):
             # Create label for key name information
             label = QLabel()
             key_info = value["name"] or key
@@ -84,7 +83,7 @@ class Wizard(QWidget):  # type: ignore
             )
             self.buttons.append(button)
             button.clicked.connect(
-                partial(self.openDialog, i, getattr(self.config, key))
+                partial(self.openDialog, i, getattr(self.config.keys, key))
             )
             self.layout.addWidget(button, i, 1)
 
@@ -103,7 +102,7 @@ class Wizard(QWidget):  # type: ignore
 
     def saveConfig(self) -> None:
         try:
-            Config.parse_obj(self.config.dict())
+            Config.model_validate(self.config.dict())
         except ValueError:
             msg = QMessageBox()
             msg.setIcon(QMessageBox.Critical)
@@ -131,7 +130,7 @@ class Wizard(QWidget):  # type: ignore
 @config_options
 @click.help_option("-h", "--help")
 @verbosity_option
-def wizard(config_path: str, force: bool, merge: bool) -> None:
+def wizard(config_path: Path, force: bool, merge: bool) -> None:
     """Launch configuration wizard."""
     return _init(config_path, force, merge, skip_interactive=False)
 
@@ -141,18 +140,18 @@ def wizard(config_path: str, force: bool, merge: bool) -> None:
 @click.help_option("-h", "--help")
 @verbosity_option
 def init(
-    config_path: str, force: bool, merge: bool, skip_interactive: bool = False
+    config_path: Path, force: bool, merge: bool, skip_interactive: bool = False
 ) -> None:
     """Initialize a new default configuration file."""
     return _init(config_path, force, merge, skip_interactive=True)
 
 
 def _init(
-    config_path: str, force: bool, merge: bool, skip_interactive: bool = False
+    config_path: Path, force: bool, merge: bool, skip_interactive: bool = False
 ) -> None:
     """Actual initialization code for configuration file, with optional interactive mode."""
 
-    if os.path.exists(config_path):
+    if config_path.exists():
         click.secho(f"The `{CONFIG_PATH}` configuration file exists")
 
         if not force and not merge:
@@ -176,8 +175,8 @@ def _init(
         logger.debug("Merging new config into `{config_path}`")
 
     if not skip_interactive:
-        if os.path.exists(config_path):
-            config = Config.parse_file(config_path)
+        if config_path.exists():
+            config = Config.from_file(config_path)
 
         app = QApplication(sys.argv)
         app.setApplicationName("Manim Slides Wizard")
@@ -188,9 +187,8 @@ def _init(
         config = window.config
 
     if merge:
-        config = Config.parse_file(config_path).merge_with(config)
+        config = Config.from_file(config_path).merge_with(config)
 
-    with open(config_path, "w") as config_file:
-        config_file.write(config.json(indent=2))
+    config.to_file(config_path)
 
     click.secho(f"Configuration file successfully saved to `{config_path}`")

paper/paper.bib

@@ -0,0 +1,53 @@
+@online{manim-announcement,
+  author = {Grant Sanderson},
+  title = {{Q}\&{A} with {G}rant {S}anderson (3blue1brown)},
+  year = {2018},
+  organization = {YouTube},
+  url = {https://www.youtube.com/watch?v=Qe6o9j4IjTo\&ab_channel=3Blue1Brown}
+}
+
+@misc{revealjs,
+  author = {Hakim El Hattab},
+  title = {The HTML Presentation Framework},
+  year = {2022},
+  publisher = {GitHub},
+  journal = {GitHub repository},
+  url = {https://github.com/hakimel/reveal.js}
+}
+
+@misc{manim-presentation,
+  author = {Federico Galatolo},
+  title = {Tool for live presentations using manim},
+  year = {2021},
+  publisher = {GitHub},
+  journal = {GitHub repository},
+  url = {https://github.com/galatolofederico/manim-presentation}
+}
+
+@misc{manimgl,
+  author = {Grant Sanderson},
+  title = {Animation engine for explanatory math videos},
+  year = {2022},
+  publisher = {GitHub},
+  journal = {GitHub repository},
+  url = {https://github.com/3b1b/manim}
+}
+
+@misc{manim-editor,
+  author = {Christopher Besch},
+  title = {Web Presenter for Mathematical Animations using Manim},
+  year = {2022},
+  publisher = {GitHub},
+  journal = {GitHub repository},
+  url = {https://github.com/ManimCommunity/manim_editor}
+}
+
+@software{manimce,
+  author = {{The Manim Community Developers}},
+  license = {MIT},
+  month = {12},
+  title = {{Manim – Mathematical Animation Framework}},
+  url = {https://www.manim.community/},
+  version = {v0.17.2},
+  year = {2022}
+}

paper/paper.md

@@ -0,0 +1,174 @@
+---
+title: 'Manim Slides: A Python package for presenting Manim content anywhere'
+tags:
+  - Python
+  - manim
+  - animations
+  - teaching
+  - conference presentations
+  - tool
+authors:
+  - name: Jérome Eertmans
+    orcid: 0000-0002-5579-5360
+    affiliation: 1
+affiliations:
+ - name: ICTEAM, UCLouvain, Belgium
+   index: 1
+date: 2 March 2023
+bibliography: paper.bib
+---
+
+# Summary
+
+Manim Slides is a Python package that makes presenting Manim animations
+straightforward. With minimal changes required to pre-existing code, one can
+slide through animations in a *PowerPoint-like* manner, or share its slides
+*online* using ReavealJS' power.
+
+# Introduction
+
+Presenting educational content has always been a difficult task, especially
+when it uses temporal or iterative concepts. During the last decades, the
+presence of computers in classrooms for educational purposes has increased
+enormously, allowing teachers to show animated or interactive content.
+
+With the democratization of YouTube, many people have decided to use this
+platform to share educational content. Among these people, Grant Sanderson, a
+YouTuber presenting videos on the theme of mathematics, quickly became known
+for his original and quality animations. In 2018, Grant announced in a video
+that he creates his animations using a self-developed Python tool called Manim
+[@manim-announcement]. In 2019, he made the Manim source code public [@manimgl],
+so anyone can use his tool. Very quickly, the community came together and, in
+2020, created a "fork" of the original GitHub repository [@manimce], in order to
+create a more accessible and better documented version of this tool. Since then,
+the two versions are differentiated by using ManimGL for Grant Sanderson's
+version, as it uses OpenGL for rendering, and ManimCE for the community edition
+(CE).
+
+Despite the many advantages of the Manim tool in terms of illustrating
+mathematical concepts, one cannot help but notice that most presentations,
+whether in the classroom or at a conference, are mainly done with PowerPoint
+or PDF slides. One of the many advantages of these formats, as opposed to videos
+created with Manim, is the ability to pause, rewind, etc., whenever you want.
+
+To face this problem, in 2021, the manim-presentation tool was created
+[@manim-presentation]. This tool allows you to present Manim animations as you
+would present slides: with pauses, slide jumps, etc. However, this tool has
+evolved very little since its inception and does not work with ManimGL.
+
+In 2022, Manim Slides has been created from manim-presentation, with the aim
+to make it a more complete tool, better documented, and usable on all platforms
+and with ManimCE or ManimGL. After almost a year of existence, Manim Slides has
+evolved a lot (see
+[comparison section](#comparison-with-manim-presentation)),
+has built a small community of contributors, and continues to
+provide new features on a regular basis.
+
+# Easy to Use Commitment
+
+Manim Slides is commited to be an easy-to-use tool, with minimal installation
+procedure and few modifications required. It can either be used locally with its
+graphical user interface (GUI), or shared via one of the two formats it can
+convert to:
+
+* an HTML page thanks to the RevealJS Javascript package [@revealjs];
+* or a PowerPoint (`.pptx`) file.
+
+This work has a very similar syntax to Manim and offers a comprehensive
+documentation hosted on [GitHub pages](https://jeertmans.github.io/manim-slides/), see
+\autoref{fig:docs}.
+
+![Manim Slides' documentation homepage.\label{fig:docs}](docs.png)
+
+# Example usage
+
+We have used manim-presentation for our presentation at the COST
+Interact, hosted in Lyon, 2022, and
+[available online](https://web.archive.org/web/20230507184944/https://eertmans.be/posts/cost-interact-presentation/).
+This experience highly motivated the development of Manim Slides, and our
+EuCAP 2023 presentation slides are already
+[available online](https://web.archive.org/web/20230507211243/https://eertmans.be/posts/eucap-presentation/), thanks
+to Manim Slides' HTML feature.
+
+Also, one of our users created a short
+[video tutorial](https://www.youtube.com/watch?v=Oc9g89VzKsY&ab_channel=TheoremofBeethoven)
+and posted it on YouTube.
+
+# Stability and releases
+
+Manim Slides is continously tested on most recent Python versions, both ManimCE
+and ManimGL, and on all major platforms: **Ubuntu**, **macOS** and **Windows**. Due to Manim
+Slide's exposed API being very minimal, and the variety of tests that are
+performed, this tool can be considered stable over time.
+
+New releases are very frequent, as they mostly introduce enhancements or small
+documention fixes, and the command-line tool automatically notifies for new
+available updates. Therefore, regularly updating Manim Slides is highly
+recommended.
+
+# Statement of Need
+
+Similar tools to Manim Slides also exist, such as its predecessor,
+manim-presentation [@manim-presentation], or the web-based alternative, Manim
+Editor [@manim-editor], but none of them provide the documentation level nor the
+amount of features that Manim Slides strives to. This work makes the task of
+presenting Manim content in front of an audience much easier than before,
+allowing presenters to focus more on the content of their slides, rather than on
+how to actually present them efficiently.
+
+## Target Audience
+
+Manim Slides was developed with the goal of making educational content more
+accessible than ever. We believe that researchers, professors, teaching
+assistants and anyone else who needs to teach scientific content can benefit
+from using this tool. The ability to pace your presentation yourself is
+essential, and Manim Slides gives you that ability.
+
+## A Need for Portability
+
+One of the major concerns with presenting content in a non-standard format
+(i.e., not just a plain PDF) is the issue of portability.
+Depending on the programs available, the power of the target computer,
+or the access to the internet, not all solutions are equal.
+From the same configuration file, Manim Slides offers a series of solutions to
+share your slides, which we discuss on our
+[Sharing your slides](https://jeertmans.github.io/manim-slides/reference/sharing.html)
+page.
+
+## Comparison with manim-presentation
+
+Starting from @manim-presentation's original work, Manim Slides now provides
+numerous additional features.
+A non-exhaustive list of those new features is as follows:
+
+* ManimGL compatibility;
+* playing slides in reverse;
+* exporting slides to HTML and PowerPoint;
+* 3D scene support;
+* multiple key inputs can map to the same action
+  (e.g., useful when using a pointer);
+* optionally hiding mouse cursor when presenting;
+* recording your presentation;
+* multiple video scaling methods (for speed-vs-quality tradeoff);
+* and automatic detection of some scene parameters
+  (e.g., resolution or background color).
+
+The complete and up-to-date set of features Manim Slide supports is
+available in the
+[online documentation](https://jeertmans.github.io/manim-slides/).
+For new feature requests, we highly encourage users to
+[create an issue](https://github.com/jeertmans/manim-slides/issues/new/choose)
+with the appropriate template.
+
+# Acknowledgements
+
+We acknowledge the work of @manim-presentation that paved the initial structure
+of Manim Slides with the manim-presentation Python package.
+
+We also acknowledge Grant Sanderson for his tremendous work on Manim, as
+well as the Manim Community contributors.
+
+Finally, we also acknowledge contributions from the GitHub contributors on the
+Manim Slides repository.
+
+# References

pyproject.toml

@@ -1,56 +1,132 @@
+[build-system]
+build-backend = "poetry.core.masonry.api"
+requires = ["setuptools", "poetry-core>=1.0.0"]
+
+[tool.black]
+target-version = ["py38"]
+
+[tool.isort]
+profile = "black"
+py_version = 38
+
+[tool.mypy]
+disallow_untyped_decorators = false
+install_types = true
+python_version = "3.8"
+strict = true
+
 [tool.poetry]
-name = "manim-slides"
-description = "Tool for live presentations using manim"
 authors = [
-    "Jérome Eertmans <jeertmans@icloud.com>"
+  "Jérome Eertmans <jeertmans@icloud.com>"
 ]
-version = "4.7.1"
-license = "GPL-3.0-only"
-readme = "README.md"
-homepage = "https://github.com/jeertmans/manim-slides"
-documentation = "https://eertmans.be/manim-slides"
-repository = "https://github.com/jeertmans/manim-slides"
-
-keywords = ["manim", "slides", "plugin", "manimgl"]
-
 classifiers = [
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9",
-        "Programming Language :: Python :: 3.10",
-        "Programming Language :: Python :: 3.11",
-        "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
-        "Operating System :: OS Independent",
-        "Topic :: Multimedia :: Video",
-        "Topic :: Multimedia :: Graphics",
-        "Topic :: Scientific/Engineering",
-    ]
-
-exclude = ["docs/","static/"]
-packages = [
-    { include = "manim_slides" },
+  "Programming Language :: Python :: 3",
+  "Programming Language :: Python :: 3.8",
+  "Programming Language :: Python :: 3.9",
+  "Programming Language :: Python :: 3.10",
+  "Programming Language :: Python :: 3.11",
+  "License :: OSI Approved :: MIT License",
+  "Operating System :: OS Independent",
+  "Topic :: Multimedia :: Video",
+  "Topic :: Multimedia :: Graphics",
+  "Topic :: Scientific/Engineering"
 ]
-
+description = "Tool for live presentations using manim"
+documentation = "https://eertmans.be/manim-slides"
+exclude = ["docs/", "static/"]
+homepage = "https://github.com/jeertmans/manim-slides"
+keywords = ["manim", "slides", "plugin", "manimgl"]
+license = "MIT"
+name = "manim-slides"
+packages = [
+  {include = "manim_slides"}
+]
+readme = "README.md"
+repository = "https://github.com/jeertmans/manim-slides"
+version = "4.16.1"
 
 [tool.poetry.dependencies]
-python = ">=3.8,<3.12"
-click = ">=8.0"
-click-default-group = ">=1.2"
-numpy = ">=1.19"
-opencv-python = ">=4.6"
-pydantic = ">=1.9"
-pyside6 = ">=6"
-requests = ">=2.26"
-tqdm = ">=4.62"
+click = "^8.1.3"
+click-default-group = "^1.2.2"
+docutils = {version = "^0.20.1", optional = true}
+ipython = {version = ">=8.12.2", optional = true}
+jinja2 = {version = "^3.1.2", optional = true}
+lxml = "^4.9.2"
+manim = {version = "^0.17.3", optional = true}
+manimgl = {version = "^1.6.1", optional = true}
+notebook = {version = "^7.0.2", optional = true}
+numpy = "^1.19"
+opencv-python = "^4.6.0.66"
+pillow = "^9.5.0"
+pydantic = "^2.0.1"
+pydantic-extra-types = "^2.0.0"
+pyside6 = "^6.5.1.1"
+python = ">=3.8.1,<3.12"
+python-pptx = "^0.6.21"
+requests = "^2.28.1"
+rich = "^13.3.2"
+rtoml = "^0.9.0"
+tqdm = "^4.64.1"
 
-[tool.poetry.dev-dependencies]
-manim = "^0.17.0"
+[tool.poetry.extras]
+magic = ["manim", "ipython"]
+manim = ["manim"]
+manimgl = ["manimgl"]
+sphinx-directive = ["docutils", "jinja2", "manim"]
+
+[tool.poetry.group.dev]
+optional = true
+
+[tool.poetry.group.dev.dependencies]
+black = "^22.10.0"
+bump2version = "^1.0.1"
+isort = "^5.12.0"
+mypy = "^0.991"
+pre-commit = "^3.0.2"
+ruff = "^0.0.219"
+
+[tool.poetry.group.docs]
+optional = true
+
+[tool.poetry.group.docs.dependencies]
+furo = "^2023.5.20"
+ipykernel = "^6.25.1"
+manim = "^0.17.3"
+myst-parser = "^2.0.0"
+nbsphinx = "^0.9.2"
+pandoc = "^2.3"
+sphinx = "^7.0.1"
+sphinx-click = "^4.4.0"
+sphinx-copybutton = "^0.5.1"
+sphinxext-opengraph = "^0.7.5"
+
+[tool.poetry.group.test]
+optional = true
+
+[tool.poetry.group.test.dependencies]
+manim = "^0.17.3"
 manimgl = "^1.6.1"
-
-[build-system]
-requires = ["setuptools","poetry-core>=1.0.0"]
-build-backend = "poetry.core.masonry.api"
+pytest = "^7.4.0"
+pytest-cov = "^4.1.0"
+pytest-env = "^0.8.2"
+pytest-xdist = "^3.3.1"
 
 [tool.poetry.plugins]
+
 [tool.poetry.plugins."console_scripts"]
 manim-slides = "manim_slides.__main__:cli"
+
+[tool.pytest.ini_options]
+env = [
+  "QT_QPA_PLATFORM=offscreen"
+]
+filterwarnings = [
+  "error",
+  "ignore::DeprecationWarning"
+]
+
+[tool.ruff]
+ignore = [
+  "E501"
+]
+target-version = "py38"

static/logo.py

@@ -1,17 +1,29 @@
 # flake8: noqa: F403, F405
 # type: ignore
+import os
+
 from manim import *
 
+THEME = os.environ.get("MANIM_SLIDES_THEME", "light").lower().replace("_", "-")
+
 
 class ManimSlidesLogo(Scene):
     def construct(self):
         tex_template = TexTemplate()
         tex_template.add_to_preamble(r"\usepackage{graphicx}\usepackage{fontawesome5}")
-        self.camera.background_color = "#ffffff"
+        self.camera.background_color = {
+            "light": "#ffffff",
+            "dark-docs": "#131416",
+            "dark-github": "#0d1117",
+        }[THEME]
         logo_green = "#87c2a5"
         logo_blue = "#525893"
         logo_red = "#e07a5f"
-        logo_black = "#343434"
+        logo_black = {
+            "light": "#343434",
+            "dark-docs": "#d0d0d0",
+            "dark-github": "#c9d1d9",
+        }[THEME]
         ds_m = MathTex(r"\mathbb{M}", fill_color=logo_black).scale(7)
         ds_m.shift(2.25 * LEFT + 1.5 * UP)
         slides = MathTex(r"\mathbb{S}\text{lides}", fill_color=logo_black).scale(4)

static/make_logo.sh

@@ -0,0 +1,21 @@
+#! /bin/bash
+
+MANIM_SLIDES_THEME=light poetry run manim render -qk -s --format png --resolution 2560,1280 static/logo.py && mv media/images/logo/*.png static/logo.png
+
+ln -f -r -s static/logo.png docs/source/_static/logo.png
+
+MANIM_SLIDES_THEME=dark_docs poetry run manim render -qk -s --format png --resolution 2560,1280 static/logo.py && mv media/images/logo/*.png static/logo_dark_docs.png
+
+ln -f -r -s static/logo_dark_docs.png docs/source/_static/logo_dark_docs.png
+
+MANIM_SLIDES_THEME=dark_github poetry run manim render -qk -s --format png --resolution 2560,1280 static/logo.py && mv media/images/logo/*.png static/logo_dark_github.png
+
+ln -f -r -s static/logo_dark_github.png docs/source/_static/logo_dark_github.png
+
+MANIM_SLIDES_THEME=light poetry run manim render -t -qk -s --format png --resolution 2560,1280 static/logo.py && mv media/images/logo/*.png static/logo_light_transparent.png
+
+ln -f -r -s static/logo_light_transparent.png docs/source/_static/logo_light_transparent.png
+
+MANIM_SLIDES_THEME=dark_docs poetry run manim render -t -qk -s --format png --resolution 2560,1280 static/logo.py && mv media/images/logo/*.png static/logo_dark_transparent.png
+
+ln -f -r -s static/logo_dark_transparent.png docs/source/_static/logo_dark_transparent.png

tests/conftest.py

@@ -0,0 +1,13 @@
+from pathlib import Path
+from typing import Iterator
+
+import pytest
+
+from manim_slides.logger import make_logger
+
+_ = make_logger()  # This is run so that "PERF" level is created
+
+
+@pytest.fixture
+def folder_path() -> Iterator[Path]:
+    yield (Path(__file__).parent / "slides").resolve()

tests/slides/BasicExample.json

@@ -0,0 +1,32 @@
+{
+  "slides": [
+    {
+      "type": "slide",
+      "start_animation": 0,
+      "end_animation": 1,
+      "number": 1
+    },
+    {
+      "type": "loop",
+      "start_animation": 1,
+      "end_animation": 2,
+      "number": 2
+    },
+    {
+      "type": "last",
+      "start_animation": 2,
+      "end_animation": 3,
+      "number": 3
+    }
+  ],
+  "files": [
+    "slides/files/BasicExample/1413466013_3346521118_223132457.mp4",
+    "slides/files/BasicExample/1672018281_3136302242_2191168284.mp4",
+    "slides/files/BasicExample/1672018281_1369283980_3942561600.mp4"
+  ],
+  "resolution": [
+    1920,
+    1080
+  ],
+  "background_color": "black"
+}

tests/test_commons.py

@@ -0,0 +1,142 @@
+from pathlib import Path
+
+import click
+import pytest
+from click.testing import CliRunner
+
+from manim_slides.commons import (
+    config_options,
+    config_path_option,
+    folder_path_option,
+    verbosity_option,
+)
+
+
+def test_config_options() -> None:
+    @click.command()
+    @config_options
+    def main(config_path: Path, force: bool, merge: bool) -> None:
+        pass
+
+    runner = CliRunner()
+
+    with runner.isolated_filesystem():
+        with open("config.json", "w") as f:
+            f.write("Hello world!")
+
+        result = runner.invoke(main, ["--config", "config.json", "--force", "--merge"])
+
+        assert result.exit_code == 0
+
+        result = runner.invoke(main, ["-c", "config.json", "-f", "-m"])
+
+
+def test_config_path_option() -> None:
+    @click.command()
+    @config_path_option
+    def main(config_path: Path) -> None:
+        pass
+
+    runner = CliRunner()
+
+    with runner.isolated_filesystem() as temp_dir:
+        with open("config.json", "w") as f:
+            f.write("Hello world!")
+
+        result = runner.invoke(main, ["--config", "config.json"])
+
+        assert result.exit_code == 0
+
+        result = runner.invoke(main, ["-c", "config.json"])
+
+        assert result.exit_code == 0
+
+        result = runner.invoke(main, ["--config", "unexisting.json"])
+
+        assert result.exit_code == 0
+
+        result = runner.invoke(main, ["--config", "unexisting"])
+
+        assert result.exit_code == 0
+
+        result = runner.invoke(main, ["--config", temp_dir])
+
+        assert result.exit_code != 0
+
+
+def test_folder_path_option() -> None:
+    @click.command()
+    @folder_path_option
+    def main(folder: Path) -> None:
+        pass
+
+    runner = CliRunner()
+
+    with runner.isolated_filesystem() as temp_dir:
+        with open("file.txt", "w") as f:
+            f.write("Hello world!")
+
+        result = runner.invoke(main, ["--folder", "file.txt"])
+
+        assert result.exit_code != 0
+
+        result = runner.invoke(main, ["--folder", "unexisting.txt"])
+
+        assert result.exit_code != 0
+
+        result = runner.invoke(main, ["--folder", "unexisting"])
+
+        assert result.exit_code != 0
+
+        result = runner.invoke(main, ["--folder", temp_dir])
+
+        assert result.exit_code == 0
+
+
+@pytest.mark.parametrize(
+    ("verbosity",),
+    [("PeRF",), ("DEBUG",), ("info",), ("waRNING",), ("eRRor",), ("CrItIcAl",)],
+)
+def test_valid_verbosity_option(verbosity: str) -> None:
+    @click.command()
+    @verbosity_option
+    def main() -> None:
+        pass
+
+    runner = CliRunner()
+    result = runner.invoke(main, ["-v", verbosity])
+
+    assert result.exit_code == 0
+
+    result = runner.invoke(main, ["--verbosity", verbosity])
+
+    assert result.exit_code == 0
+
+    with runner.isolation(env={"MANIM_SLIDES_VERBOSITY": verbosity}):
+        result = runner.invoke(main)
+
+        assert result.exit_code == 0
+
+
+@pytest.mark.parametrize(
+    ("verbosity",), [("test",), ("deebug",), ("warn",), ("errors",)]
+)
+def test_invalid_verbosity_option(verbosity: str) -> None:
+    @click.command()
+    @verbosity_option
+    def main() -> None:
+        pass
+
+    runner = CliRunner()
+    result = runner.invoke(main, ["-v", verbosity])
+
+    assert result.exit_code != 0
+
+    result = runner.invoke(main, ["--verbosity", verbosity])
+
+    assert result.exit_code != 0
+
+    with runner.isolation(env={"MANIM_SLIDES_VERBOSITY": verbosity}):
+        result = runner.invoke(main)
+
+        assert result.exit_code != 0

tests/test_config.py

@@ -0,0 +1,103 @@
+import random
+import string
+import tempfile
+from pathlib import Path
+from typing import Any, Generator, List
+
+import pytest
+from pydantic import ValidationError
+
+from manim_slides.config import (
+    Key,
+    PresentationConfig,
+    SlideConfig,
+    SlideType,
+    merge_basenames,
+)
+
+
+def random_path(
+    length: int = 20,
+    dirname: Path = Path("./media/videos/example"),
+    suffix: str = ".mp4",
+    touch: bool = False,
+) -> Path:
+    basename = "".join(random.choices(string.ascii_letters, k=length))
+
+    filepath = dirname.joinpath(basename + suffix)
+
+    if touch:
+        filepath.touch()
+
+    return filepath
+
+
+@pytest.fixture
+def paths() -> Generator[List[Path], None, None]:
+    random.seed(1234)
+
+    yield [random_path() for _ in range(20)]
+
+
+@pytest.fixture
+def presentation_config(paths: List[Path]) -> Generator[PresentationConfig, None, None]:
+    dirname = Path(tempfile.mkdtemp())
+    files = [random_path(dirname=dirname, touch=True) for _ in range(10)]
+
+    slides = [
+        SlideConfig(
+            type=SlideType.slide,
+            start_animation=0,
+            end_animation=5,
+            number=1,
+        ),
+        SlideConfig(
+            type=SlideType.loop,
+            start_animation=5,
+            end_animation=6,
+            number=2,
+        ),
+        SlideConfig(
+            type=SlideType.last,
+            start_animation=6,
+            end_animation=10,
+            number=3,
+        ),
+    ]
+
+    yield PresentationConfig(
+        slides=slides,
+        files=files,
+    )
+
+
+def test_merge_basenames(paths: List[Path]) -> None:
+    path = merge_basenames(paths)
+    assert path.suffix == paths[0].suffix
+    assert path.parent == paths[0].parent
+
+
+class TestKey:
+    @pytest.mark.parametrize(("ids", "name"), [([1], None), ([1], "some key name")])
+    def test_valid_keys(self, ids: Any, name: Any) -> None:
+        _ = Key(ids=ids, name=name)
+
+    @pytest.mark.parametrize(
+        ("ids", "name"), [([], None), ([-1], None), ([1], {"an": " invalid name"})]
+    )
+    def test_invalid_keys(self, ids: Any, name: Any) -> None:
+        with pytest.raises(ValidationError):
+            _ = Key(ids=ids, name=name)
+
+
+class TestPresentationConfig:
+    def test_validate(self, presentation_config: PresentationConfig) -> None:
+        obj = presentation_config.model_dump()
+        _ = PresentationConfig.model_validate(obj)
+
+    def test_bump_to_json(self, presentation_config: PresentationConfig) -> None:
+        _ = presentation_config.model_dump_json(indent=2)
+
+    def test_empty_presentation_config(self) -> None:
+        with pytest.raises(ValidationError):
+            _ = PresentationConfig(slides=[], files=[])

tests/test_convert.py

@@ -0,0 +1,131 @@
+from enum import EnumMeta
+
+import pytest
+
+from manim_slides.convert import (
+    PDF,
+    AutoAnimateEasing,
+    AutoAnimateMatcher,
+    AutoPlayMedia,
+    AutoSlideMethod,
+    BackgroundSize,
+    BackgroundTransition,
+    ControlsBackArrows,
+    ControlsLayout,
+    Converter,
+    Display,
+    JsBool,
+    JsFalse,
+    JsNull,
+    JsTrue,
+    KeyboardCondition,
+    NavigationMode,
+    PowerPoint,
+    PreloadIframes,
+    RevealJS,
+    RevealTheme,
+    ShowSlideNumber,
+    SlideNumber,
+    Transition,
+    TransitionSpeed,
+)
+
+
+@pytest.mark.parametrize(
+    ("enum_type",),
+    [
+        (JsTrue,),
+        (JsFalse,),
+        (JsBool,),
+        (JsNull,),
+        (ControlsLayout,),
+        (ControlsBackArrows,),
+        (SlideNumber,),
+        (ShowSlideNumber,),
+        (KeyboardCondition,),
+        (NavigationMode,),
+        (AutoPlayMedia,),
+        (PreloadIframes,),
+        (AutoAnimateMatcher,),
+        (AutoAnimateEasing,),
+        (AutoSlideMethod,),
+        (Transition,),
+        (TransitionSpeed,),
+        (BackgroundSize,),
+        (BackgroundTransition,),
+        (Display,),
+        (RevealTheme,),
+    ],
+)
+def test_format_enum(enum_type: EnumMeta) -> None:
+    for enum in enum_type:  # type: ignore[var-annotated]
+        expected = str(enum)
+        got = f"{enum}"
+
+        assert expected == got
+
+        got = "{enum}".format(enum=enum)
+
+        assert expected == got
+
+        got = format(enum, "")
+
+        assert expected == got
+
+
+@pytest.mark.parametrize(
+    ("enum_type",),
+    [
+        (ControlsLayout,),
+        (ControlsBackArrows,),
+        (SlideNumber,),
+        (ShowSlideNumber,),
+        (KeyboardCondition,),
+        (NavigationMode,),
+        (AutoPlayMedia,),
+        (PreloadIframes,),
+        (AutoAnimateMatcher,),
+        (AutoAnimateEasing,),
+        (AutoSlideMethod,),
+        (Transition,),
+        (TransitionSpeed,),
+        (BackgroundSize,),
+        (BackgroundTransition,),
+        (Display,),
+    ],
+)
+def test_quoted_enum(enum_type: EnumMeta) -> None:
+    for enum in enum_type:  # type: ignore[var-annotated]
+        if enum in ["true", "false", "null"]:
+            continue
+
+        expected = "'" + enum.value + "'"
+        got = str(enum)
+
+        assert expected == got
+
+
+@pytest.mark.parametrize(
+    ("enum_type",),
+    [
+        (JsTrue,),
+        (JsFalse,),
+        (JsBool,),
+        (JsNull,),
+        (RevealTheme,),
+    ],
+)
+def test_unquoted_enum(enum_type: EnumMeta) -> None:
+    for enum in enum_type:  # type: ignore[var-annotated]
+        expected = enum.value
+        got = str(enum)
+
+        assert expected == got
+
+
+class TestConverter:
+    @pytest.mark.parametrize(
+        ("name", "converter"), [("html", RevealJS), ("pdf", PDF), ("pptx", PowerPoint)]
+    )
+    def test_from_string(self, name: str, converter: type) -> None:
+        assert Converter.from_string(name) == converter

tests/test_defaults.py

@@ -0,0 +1,15 @@
+from pathlib import Path
+
+from manim_slides.defaults import CONFIG_PATH, FFMPEG_BIN, FOLDER_PATH
+
+
+def test_folder_path() -> None:
+    assert FOLDER_PATH == Path("./slides")
+
+
+def test_config_path() -> None:
+    assert CONFIG_PATH == Path(".manim-slides.toml")
+
+
+def test_ffmpeg_bin() -> None:
+    assert FFMPEG_BIN == Path("ffmpeg")

tests/test_main.py

@@ -0,0 +1,93 @@
+from pathlib import Path
+
+from click.testing import CliRunner
+
+from manim_slides.__main__ import cli
+
+
+def test_help() -> None:
+    runner = CliRunner()
+    results = runner.invoke(cli, ["-S", "--help"])
+
+    assert results.exit_code == 0
+
+    results = runner.invoke(cli, ["-S", "-h"])
+
+    assert results.exit_code == 0
+
+
+def test_defaults_to_present(folder_path: Path) -> None:
+    runner = CliRunner()
+
+    with runner.isolated_filesystem():
+        results = runner.invoke(
+            cli, ["BasicExample", "--folder", str(folder_path), "-s"]
+        )
+
+        assert results.exit_code == 0
+
+
+def test_present(folder_path: Path) -> None:
+    runner = CliRunner()
+
+    with runner.isolated_filesystem():
+        results = runner.invoke(
+            cli, ["present", "BasicExample", "--folder", str(folder_path), "-s"]
+        )
+
+        assert results.exit_code == 0
+
+
+def test_convert(folder_path: Path) -> None:
+    runner = CliRunner()
+
+    with runner.isolated_filesystem():
+        results = runner.invoke(
+            cli,
+            [
+                "convert",
+                "BasicExample",
+                "basic_example.html",
+                "--folder",
+                str(folder_path),
+            ],
+        )
+
+        assert results.exit_code == 0
+
+
+def test_init() -> None:
+    runner = CliRunner()
+
+    with runner.isolated_filesystem():
+        results = runner.invoke(
+            cli,
+            [
+                "init",
+                "--force",
+            ],
+        )
+
+        assert results.exit_code == 0
+
+
+def test_list_scenes(folder_path: Path) -> None:
+    runner = CliRunner()
+
+    with runner.isolated_filesystem():
+        results = runner.invoke(
+            cli,
+            [
+                "list-scenes",
+                "--folder",
+                str(folder_path),
+            ],
+        )
+
+        assert results.exit_code == 0
+        assert "BasicExample" in results.output
+
+
+def test_wizard() -> None:
+    # TODO
+    pass

tests/test_manim.py

@@ -0,0 +1,143 @@
+import importlib
+import sys
+from contextlib import contextmanager
+from importlib.abc import MetaPathFinder
+from importlib.machinery import ModuleSpec
+from types import ModuleType
+from typing import Iterator, Optional, Sequence
+
+import pytest
+
+import manim_slides.manim as msm
+
+
+@contextmanager
+def suppress_module_finder() -> Iterator[None]:
+    meta_path = sys.meta_path
+    try:
+
+        class PathFinder(MetaPathFinder):
+            @classmethod
+            def find_spec(
+                cls,
+                fullname: str,
+                path: Optional[Sequence[str]],
+                target: Optional[ModuleType] = None,
+            ) -> Optional[ModuleSpec]:
+                if fullname in ["manim", "manimlib"]:
+                    return None
+
+                for finder in meta_path:
+                    spec = finder.find_spec(fullname, path, target=target)
+                    if spec is not None:
+                        return spec
+
+                return None
+
+        sys.meta_path = [PathFinder]
+        yield
+    finally:
+        sys.meta_path = meta_path
+
+
+def assert_import(
+    *,
+    manim: bool,
+    manim_available: bool,
+    manim_imported: bool,
+    manimgl: bool,
+    manimgl_available: bool,
+    manimgl_imported: bool,
+) -> None:
+    importlib.reload(msm)
+
+    assert msm.MANIM == manim
+    assert msm.MANIM_AVAILABLE == manim_available
+    assert msm.MANIM_IMPORTED == manim_imported
+    assert msm.MANIMGL == manimgl
+    assert msm.MANIMGL_AVAILABLE == manim_available
+    assert msm.MANIMGL_IMPORTED == manimgl_imported
+
+
+@pytest.mark.filterwarnings("ignore:assert_import")
+def test_manim_and_manimgl_imported() -> None:
+    import manim  # noqa: F401
+    import manimlib  # noqa: F401
+
+    assert_import(
+        manim=True,
+        manim_available=True,
+        manim_imported=True,
+        manimgl=False,
+        manimgl_available=True,
+        manimgl_imported=True,
+    )
+
+
+def test_manim_imported() -> None:
+    import manim  # noqa: F401
+
+    if "manimlib" in sys.modules:
+        del sys.modules["manimlib"]
+
+    assert_import(
+        manim=True,
+        manim_available=True,
+        manim_imported=True,
+        manimgl=False,
+        manimgl_available=True,
+        manimgl_imported=False,
+    )
+
+
+def test_manimgl_imported() -> None:
+    import manimlib  # noqa: F401
+
+    if "manim" in sys.modules:
+        del sys.modules["manim"]
+
+    assert_import(
+        manim=False,
+        manim_available=True,
+        manim_imported=False,
+        manimgl=True,
+        manimgl_available=True,
+        manimgl_imported=True,
+    )
+
+
+def test_nothing_imported() -> None:
+    if "manim" in sys.modules:
+        del sys.modules["manim"]
+
+    if "manimlib" in sys.modules:
+        del sys.modules["manimlib"]
+
+    assert_import(
+        manim=True,
+        manim_available=True,
+        manim_imported=False,
+        manimgl=False,
+        manimgl_available=True,
+        manimgl_imported=False,
+    )
+
+
+def test_no_package_available() -> None:
+    with suppress_module_finder():
+        if "manim" in sys.modules:
+            del sys.modules["manim"]
+
+        if "manimlib" in sys.modules:
+            del sys.modules["manimlib"]
+
+        with pytest.raises(ModuleNotFoundError):
+            # Actual values are not important
+            assert_import(
+                manim=False,
+                manim_available=False,
+                manim_imported=False,
+                manimgl=False,
+                manimgl_available=False,
+                manimgl_imported=False,
+            )

tests/test_slide.py

@@ -0,0 +1,107 @@
+import pytest
+from manim import Text
+from pydantic import ValidationError
+
+from manim_slides.slide import Slide
+
+
+def assert_construct(cls: type) -> type:
+    class Wrapper:
+        @classmethod
+        def test_construct(_) -> None:
+            cls().construct()
+
+    return Wrapper
+
+
+class TestSlide:
+    @assert_construct
+    class TestLoop(Slide):
+        def construct(self) -> None:
+            text = Text("Some text")
+
+            self.add(text)
+
+            self.start_loop()
+            self.play(text.animate.scale(2))
+            self.end_loop()
+
+            with pytest.raises(AssertionError):
+                self.end_loop()
+
+            self.start_loop()
+            with pytest.raises(AssertionError):
+                self.start_loop()
+
+            with pytest.raises(ValidationError):
+                self.end_loop()
+
+    @assert_construct
+    class TestWipe(Slide):
+        def construct(self) -> None:
+            text = Text("Some text")
+            bye = Text("Bye")
+
+            self.add(text)
+
+            assert text in self.mobjects
+            assert bye not in self.mobjects
+
+            self.play(self.wipe([text], [bye]))
+
+            assert text not in self.mobjects
+            assert bye in self.mobjects
+
+    @assert_construct
+    class TestZoom(Slide):
+        def construct(self) -> None:
+            text = Text("Some text")
+            bye = Text("Bye")
+
+            self.add(text)
+
+            assert text in self.mobjects
+            assert bye not in self.mobjects
+
+            self.play(self.zoom([text], [bye]))
+
+            assert text not in self.mobjects
+            assert bye in self.mobjects
+
+    @assert_construct
+    class TestCanvas(Slide):
+        def construct(self) -> None:
+            text = Text("Some text")
+            bye = Text("Bye")
+
+            assert len(self.canvas) == 0
+
+            self.add(text)
+
+            assert len(self.canvas) == 0
+
+            self.add_to_canvas(text=text)
+
+            assert len(self.canvas) == 1
+
+            self.add(bye)
+
+            assert len(self.canvas) == 1
+
+            assert text not in self.mobjects_without_canvas
+            assert bye in self.mobjects_without_canvas
+
+            self.remove(text)
+
+            assert len(self.canvas) == 1
+
+            self.add_to_canvas(bye=bye)
+
+            assert len(self.canvas) == 2
+
+            self.remove_from_canvas("text", "bye")
+
+            assert len(self.canvas) == 0
+
+            with pytest.raises(KeyError):
+                self.remove_from_canvas("text")