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758 lines
25 KiB
Python
758 lines
25 KiB
Python
from __future__ import annotations
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import re
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import colour
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import itertools as it
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from types import MethodType
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from typing import Iterable, Union, Sequence
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from manimlib.constants import BLACK, WHITE
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from manimlib.mobject.svg.svg_mobject import SVGMobject
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from manimlib.mobject.types.vectorized_mobject import VGroup
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from manimlib.utils.color import color_to_int_rgb
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from manimlib.utils.config_ops import digest_config
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from manimlib.utils.iterables import adjacent_pairs
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from manimlib.utils.iterables import remove_list_redundancies
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from manimlib.utils.tex_file_writing import tex_to_svg_file
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from manimlib.utils.tex_file_writing import get_tex_config
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from manimlib.utils.tex_file_writing import display_during_execution
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from manimlib.logger import log
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from typing import TYPE_CHECKING
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if TYPE_CHECKING:
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from manimlib.mobject.types.vectorized_mobject import VMobject
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ManimColor = Union[str, colour.Color, Sequence[float]]
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SCALE_FACTOR_PER_FONT_POINT = 0.001
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class _TexSVG(SVGMobject):
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CONFIG = {
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"height": None,
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"svg_default": {
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"fill_color": BLACK,
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},
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"stroke_width": 0,
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"stroke_color": WHITE,
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"path_string_config": {
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"should_subdivide_sharp_curves": True,
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"should_remove_null_curves": True,
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},
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}
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class MTex(_TexSVG):
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CONFIG = {
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"base_color": WHITE,
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"font_size": 48,
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"alignment": "\\centering",
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"tex_environment": "align*",
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"isolate": [],
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"tex_to_color_map": {},
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"use_plain_tex": False,
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}
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def __init__(self, string: str, **kwargs):
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digest_config(self, kwargs)
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string = string.strip()
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# Prevent from passing an empty string.
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if not string:
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string = "\\quad"
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self.tex_string = string
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self.string = string
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super().__init__(**kwargs)
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self.set_color_by_tex_to_color_map(self.tex_to_color_map)
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self.scale(SCALE_FACTOR_PER_FONT_POINT * self.font_size)
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@property
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def hash_seed(self) -> tuple:
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return (
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self.__class__.__name__,
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self.svg_default,
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self.path_string_config,
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self.string,
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self.base_color,
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self.alignment,
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self.tex_environment,
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self.isolate,
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self.tex_to_color_map,
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self.use_plain_tex
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)
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def get_file_path(self, use_plain_file: bool = False) -> str:
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if use_plain_file:
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content = self.plain_string
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else:
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content = self.labelled_string
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full_tex = self.get_tex_file_body(content)
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with display_during_execution(f"Writing \"{self.string}\""):
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file_path = self.tex_to_svg_file_path(full_tex)
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return file_path
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def get_tex_file_body(self, content: str) -> str:
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if self.tex_environment:
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content = "\n".join([
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f"\\begin{{{self.tex_environment}}}",
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content,
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f"\\end{{{self.tex_environment}}}"
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])
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if self.alignment:
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content = "\n".join([self.alignment, content])
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tex_config = get_tex_config()
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return tex_config["tex_body"].replace(
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tex_config["text_to_replace"],
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content
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)
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@staticmethod
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def tex_to_svg_file_path(tex_file_content: str) -> str:
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return tex_to_svg_file(tex_file_content)
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def generate_mobject(self) -> None:
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super().generate_mobject()
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if not self.submobjects:
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return
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glyph_labels = [
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self.color_to_label(glyph.get_fill_color())
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for glyph in self.submobjects
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]
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if any([
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self.use_plain_tex,
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self.color_cmd_repl_items,
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self.base_color in (BLACK, WHITE)
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]):
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file_path = self.get_file_path(use_plain_file=True)
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glyphs = _TexSVG(file_path).submobjects
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for glyph, plain_glyph in zip(self.submobjects, glyphs):
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glyph.set_fill(plain_glyph.get_fill_color())
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else:
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glyphs = self.submobjects
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self.set_fill(self.base_color)
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# Simply pack together adjacent mobjects with the same label.
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submob_labels, glyphs_lists = self.group_neighbours(
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glyph_labels, glyphs
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)
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submobjects = [
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VGroup(*glyph_list)
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for glyph_list in glyphs_lists
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]
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submob_tex_strings = self.get_submob_tex_strings(submob_labels)
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for submob, label, submob_tex in zip(
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submobjects, submob_labels, submob_tex_strings
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):
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submob.label = label
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submob.tex_string = submob_tex
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# Support `get_tex()` method here.
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submob.get_tex = MethodType(lambda inst: inst.tex_string, submob)
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self.set_submobjects(submobjects)
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## Static methods
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@staticmethod
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def color_to_label(color: ManimColor) -> int:
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r, g, b = color_to_int_rgb(color)
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rg = r * 256 + g
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rgb = rg * 256 + b
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if rgb == 16777215: # white
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return -1
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return rgb
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@staticmethod
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def get_color_command(label: int) -> str:
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if label == -1:
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label = 16777215 # white
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rg, b = divmod(label, 256)
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r, g = divmod(rg, 256)
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return "".join([
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"\\color[RGB]",
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"{",
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",".join(map(str, (r, g, b))),
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"}"
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])
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@staticmethod
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def get_neighbouring_pairs(iterable: Iterable) -> list:
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return list(adjacent_pairs(iterable))[:-1]
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@staticmethod
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def group_neighbours(
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labels: Iterable[object],
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objs: Iterable[object]
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) -> tuple[list[object], list[list[object]]]:
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# Pack together neighbouring objects sharing the same label.
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if not labels:
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return [], []
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group_labels = []
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groups = []
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new_group = []
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current_label = labels[0]
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for label, obj in zip(labels, objs):
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if label == current_label:
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new_group.append(obj)
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else:
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group_labels.append(current_label)
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groups.append(new_group)
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new_group = [obj]
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current_label = label
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group_labels.append(current_label)
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groups.append(new_group)
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return group_labels, groups
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@staticmethod
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def find_region_index(val: int, seq: list[int]) -> int:
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# Returns an integer in `range(len(seq) + 1)` satisfying
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# `seq[result - 1] <= val < seq[result]`
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if not seq:
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return 0
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if val >= seq[-1]:
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return len(seq)
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result = 0
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while val >= seq[result]:
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result += 1
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return result
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@staticmethod
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def lstrip(index: int, skipped_spans: list[tuple[int, int]]) -> int:
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index_seq = list(it.chain(*skipped_spans))
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region_index = MTex.find_region_index(index, index_seq)
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if region_index % 2 == 1:
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return index_seq[region_index]
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return index
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@staticmethod
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def rstrip(index: int, skipped_spans: list[tuple[int, int]]) -> int:
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index_seq = list(it.chain(*skipped_spans))
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region_index = MTex.find_region_index(index - 1, index_seq)
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if region_index % 2 == 1:
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return index_seq[region_index - 1]
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return index
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@staticmethod
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def strip(
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tex_span: tuple[int, int], skipped_spans: list[tuple[int, int]]
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) -> tuple[int, int] | None:
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result = (
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MTex.lstrip(tex_span[0], skipped_spans),
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MTex.rstrip(tex_span[1], skipped_spans)
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)
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if result[0] >= result[1]:
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return None
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return result
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@staticmethod
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def lslide(index: int, slid_spans: list[tuple[int, int]]) -> int:
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slide_dict = dict(slid_spans)
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while index in slide_dict.keys():
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index = slide_dict[index]
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return index
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@staticmethod
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def rslide(index: int, slid_spans: list[tuple[int, int]]) -> int:
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slide_dict = dict([
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slide_span[::-1] for slide_span in slid_spans
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])
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while index in slide_dict.keys():
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index = slide_dict[index]
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return index
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@staticmethod
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def slide(
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tex_span: tuple[int, int], slid_spans: list[tuple[int, int]]
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) -> tuple[int, int] | None:
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result = (
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MTex.lslide(tex_span[0], slid_spans),
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MTex.rslide(tex_span[1], slid_spans)
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)
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if result[0] >= result[1]:
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return None
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return result
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## Parser
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@property
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def full_span(self) -> tuple[int, int]:
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return (0, len(self.string))
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@property
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def backslash_indices(self) -> list[int]:
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# Newlines (`\\`) don't count.
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return [
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match_obj.end() - 1
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for match_obj in re.finditer(r"\\+", self.string)
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if len(match_obj.group()) % 2 == 1
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]
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def get_left_and_right_brace_indices(
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self
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) -> tuple[list[tuple[int, int]], list[tuple[int, int]]]:
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string = self.string
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indices = list(filter(
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lambda index: index - 1 not in self.backslash_indices,
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[
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match_obj.start()
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for match_obj in re.finditer(r"[{}]", string)
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]
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))
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left_brace_indices = []
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right_brace_indices = []
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left_brace_indices_stack = []
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for index in indices:
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if string[index] == "{":
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left_brace_indices_stack.append(index)
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else:
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if not left_brace_indices_stack:
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raise ValueError("Missing '{' inserted")
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left_brace_index = left_brace_indices_stack.pop()
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left_brace_indices.append(left_brace_index)
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right_brace_indices.append(index)
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if left_brace_indices_stack:
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raise ValueError("Missing '}' inserted")
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# `right_brace_indices` is already sorted.
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return left_brace_indices, right_brace_indices
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@property
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def left_brace_indices(self) -> list[tuple[int, int]]:
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return self.get_left_and_right_brace_indices()[0]
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@property
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def right_brace_indices(self) -> list[tuple[int, int]]:
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return self.get_left_and_right_brace_indices()[1]
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@property
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def skipped_spans(self) -> list[tuple[int, int]]:
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return [
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match_obj.span()
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for match_obj in re.finditer(r"\s*([_^])\s*|(\s+)", self.string)
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if match_obj.group(2) is not None
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or match_obj.start(1) - 1 not in self.backslash_indices
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]
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def lstrip_span(self, index: int) -> int:
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return self.lstrip(index, self.skipped_spans)
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def rstrip_span(self, index: int) -> int:
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return self.rstrip(index, self.skipped_spans)
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def strip_span(self, index: int) -> int:
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return self.strip(index, self.skipped_spans)
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@property
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def script_char_spans(self) -> list[tuple[int, int]]:
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return list(filter(
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lambda tex_span: self.string[slice(*tex_span)].strip(),
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self.skipped_spans
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))
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@property
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def script_content_spans(self) -> list[tuple[int, int]]:
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result = []
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brace_indices_dict = dict(zip(
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self.left_brace_indices, self.right_brace_indices
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))
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for _, span_begin in self.script_char_spans:
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if span_begin in brace_indices_dict.keys():
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span_end = brace_indices_dict[span_begin] + 1
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else:
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pattern = re.compile(r"[a-zA-Z0-9]|\\[a-zA-Z]+")
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match_obj = pattern.match(self.string, pos=span_begin)
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if not match_obj:
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script_name = {
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"_": "subscript",
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"^": "superscript"
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}[script_char]
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raise ValueError(
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f"Unclear {script_name} detected while parsing. "
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"Please use braces to clarify"
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)
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span_end = match_obj.end()
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result.append((span_begin, span_end))
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return result
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@property
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def double_braces_spans(self) -> list[tuple[int, int]]:
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# Match paired double braces (`{{...}}`).
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result = []
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reversed_brace_indices_dict = dict(zip(
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self.right_brace_indices, self.left_brace_indices
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))
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skip = False
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for prev_right_index, right_index in self.get_neighbouring_pairs(
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self.right_brace_indices
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):
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if skip:
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skip = False
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continue
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if right_index != prev_right_index + 1:
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continue
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left_index = reversed_brace_indices_dict[right_index]
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prev_left_index = reversed_brace_indices_dict[prev_right_index]
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if left_index != prev_left_index - 1:
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continue
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result.append((left_index, right_index + 1))
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skip = True
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return result
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@property
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def additional_substrings(self) -> list[str]:
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result = remove_list_redundancies(list(it.chain(
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self.tex_to_color_map.keys(),
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self.isolate
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)))
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if "" in result:
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result.remove("")
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return result
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def get_tex_span_lists(
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self
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) -> tuple[list[tuple[int, int]], list[tuple[int, int]]]:
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result = []
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extended_result = []
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script_content_spans = self.script_content_spans
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script_spans = [
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(script_char_span[0], script_content_span[1])
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for script_char_span, script_content_span in zip(
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self.script_char_spans, script_content_spans
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)
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]
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tex_spans = remove_list_redundancies([
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self.full_span,
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*self.double_braces_spans,
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*filter(lambda stripped_span: stripped_span is not None, [
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self.strip_span(match_obj.span())
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for substr in self.additional_substrings
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for match_obj in re.finditer(re.escape(substr), self.string)
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]),
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*script_content_spans
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])
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for tex_span in tex_spans:
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if tex_span in script_content_spans:
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result.append(tex_span)
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extended_result.append(tex_span)
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continue
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span_begin, span_end = tex_span
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shrinked_span = (span_begin, self.rslide(span_end, script_spans))
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extended_span = (span_begin, self.lslide(span_end, script_spans))
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if shrinked_span[0] >= shrinked_span[1]:
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continue
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if shrinked_span in result:
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continue
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result.append(shrinked_span)
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extended_result.append(extended_span)
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return result, extended_result
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@property
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def tex_span_list(self) -> list[tuple[int, int]]:
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return self.get_tex_span_lists()[0]
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@property
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def extended_tex_span_list(self) -> list[tuple[int, int]]:
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return self.get_tex_span_lists()[1]
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@property
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def containing_labels_dict(self) -> dict[tuple[int, int], list[int]]:
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tex_span_list = self.tex_span_list
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result = {
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tex_span: []
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for tex_span in tex_span_list
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}
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for span_0 in tex_span_list:
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for span_index, span_1 in enumerate(tex_span_list):
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if span_0[0] <= span_1[0] and span_1[1] <= span_0[1]:
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result[span_0].append(span_index)
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elif span_0[0] < span_1[0] < span_0[1] < span_1[1]:
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string_0, string_1 = [
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self.string[slice(*tex_span)]
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for tex_span in [span_0, span_1]
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]
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raise ValueError(
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"Partially overlapping substrings detected: "
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f"'{string_0}' and '{string_1}'"
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)
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result[self.full_span] = list(range(-1, len(tex_span_list)))
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return result
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@property
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def color_cmd_repl_items(self) -> list[tuple[tuple[int, int], str]]:
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color_related_command_dict = {
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"color": (1, False),
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"textcolor": (1, False),
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"pagecolor": (1, True),
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"colorbox": (1, True),
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"fcolorbox": (2, True),
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}
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result = []
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backslash_indices = self.backslash_indices
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right_brace_indices = self.right_brace_indices
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pattern = "".join([
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r"\\",
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"(",
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"|".join(color_related_command_dict.keys()),
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")",
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r"(?![a-zA-Z])"
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])
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for match_obj in re.finditer(pattern, self.string):
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span_begin, cmd_end = match_obj.span()
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if span_begin not in backslash_indices:
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continue
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cmd_name = match_obj.group(1)
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n_braces, substitute_cmd = color_related_command_dict[cmd_name]
|
|
span_end = right_brace_indices[self.find_region_index(
|
|
cmd_end, right_brace_indices
|
|
) + n_braces - 1] + 1
|
|
if substitute_cmd:
|
|
repl_str = "\\" + cmd_name + n_braces * "{white}"
|
|
else:
|
|
repl_str = ""
|
|
result.append(((span_begin, span_end), repl_str))
|
|
return result
|
|
|
|
@property
|
|
def span_repl_dict(self) -> dict[tuple[int, int], str]:
|
|
indices, _, _, cmd_strings = zip(*sorted([
|
|
(
|
|
tex_span[flag],
|
|
-flag,
|
|
-tex_span[1 - flag],
|
|
("{{" + self.get_color_command(label), "}}")[flag]
|
|
)
|
|
for label, tex_span in enumerate(self.extended_tex_span_list)
|
|
for flag in range(2)
|
|
]))
|
|
result = {
|
|
(index, index): "".join(cmd_strs)
|
|
for index, cmd_strs in zip(*self.group_neighbours(
|
|
indices, cmd_strings
|
|
))
|
|
}
|
|
result.update(self.color_cmd_repl_items)
|
|
return result
|
|
|
|
@property
|
|
def plain_string(self) -> str:
|
|
return "".join([
|
|
"{{",
|
|
self.get_color_command(self.color_to_label(self.base_color)),
|
|
self.string,
|
|
"}}"
|
|
])
|
|
|
|
@property
|
|
def labelled_string(self) -> str:
|
|
if not self.span_repl_dict:
|
|
return self.string
|
|
|
|
spans = sorted(self.span_repl_dict.keys())
|
|
if not all(
|
|
span_0[1] <= span_1[0]
|
|
for span_0, span_1 in self.get_neighbouring_pairs(spans)
|
|
):
|
|
raise ValueError("Failed to generate the labelled string")
|
|
|
|
span_ends, span_begins = zip(*spans)
|
|
string_pieces = [
|
|
self.string[slice(*span)]
|
|
for span in zip(
|
|
(0, *span_begins),
|
|
(*span_ends, len(self.string))
|
|
)
|
|
]
|
|
repl_strs = [
|
|
self.span_repl_dict[span]
|
|
for span in spans
|
|
]
|
|
repl_strs.append("")
|
|
return "".join(it.chain(*zip(string_pieces, repl_strs)))
|
|
|
|
def get_submob_tex_strings(self, submob_labels: list[int]) -> list[str]:
|
|
ordered_tex_spans = [
|
|
self.tex_span_list[label] if label != -1 else self.full_span
|
|
for label in submob_labels
|
|
]
|
|
ordered_containing_labels = [
|
|
self.containing_labels_dict[tex_span]
|
|
for tex_span in ordered_tex_spans
|
|
]
|
|
ordered_span_begins, ordered_span_ends = zip(*ordered_tex_spans)
|
|
string_span_begins = [
|
|
prev_end if prev_label in containing_labels else curr_begin
|
|
for prev_end, prev_label, containing_labels, curr_begin in zip(
|
|
ordered_span_ends[:-1], submob_labels[:-1],
|
|
ordered_containing_labels[1:], ordered_span_begins[1:]
|
|
)
|
|
]
|
|
string_span_ends = [
|
|
next_begin if next_label in containing_labels else curr_end
|
|
for next_begin, next_label, containing_labels, curr_end in zip(
|
|
ordered_span_begins[1:], submob_labels[1:],
|
|
ordered_containing_labels[:-1], ordered_span_ends[:-1]
|
|
)
|
|
]
|
|
string_spans = list(zip(
|
|
(ordered_span_begins[0], *string_span_begins),
|
|
(*string_span_ends, ordered_span_ends[-1])
|
|
))
|
|
|
|
string = self.string
|
|
left_brace_indices = self.left_brace_indices
|
|
right_brace_indices = self.right_brace_indices
|
|
slid_spans = self.skipped_spans + [
|
|
(index, index + 1)
|
|
for index in left_brace_indices + right_brace_indices
|
|
]
|
|
result = []
|
|
for str_span in string_spans:
|
|
str_span = self.strip_span(str_span)
|
|
if str_span is None:
|
|
continue
|
|
str_span = self.slide(str_span, slid_spans)
|
|
if str_span is None:
|
|
continue
|
|
unclosed_left_braces = 0
|
|
unclosed_right_braces = 0
|
|
for index in range(*str_span):
|
|
if index in left_brace_indices:
|
|
unclosed_left_braces += 1
|
|
elif index in right_brace_indices:
|
|
if unclosed_left_braces == 0:
|
|
unclosed_right_braces += 1
|
|
else:
|
|
unclosed_left_braces -= 1
|
|
result.append("".join([
|
|
unclosed_right_braces * "{",
|
|
string[slice(*str_span)],
|
|
unclosed_left_braces * "}"
|
|
]))
|
|
return result
|
|
|
|
@property
|
|
def specified_substrings(self) -> list[str]:
|
|
return remove_list_redundancies([
|
|
self.string[slice(*double_braces_span)]
|
|
for double_braces_span in self.double_braces_spans
|
|
] + list(filter(
|
|
lambda s: s in self.string,
|
|
self.additional_substrings
|
|
)))
|
|
|
|
def get_specified_substrings(self) -> list[str]:
|
|
return self.specified_substrings
|
|
|
|
@property
|
|
def isolated_substrings(self) -> list[str]:
|
|
return remove_list_redundancies([
|
|
self.string[slice(*tex_span)]
|
|
for tex_span in self.tex_span_list
|
|
])
|
|
|
|
def get_isolated_substrings(self) -> list[str]:
|
|
return self.isolated_substrings
|
|
|
|
## Selector
|
|
|
|
def find_span_components_of_custom_span(
|
|
self,
|
|
custom_span: tuple[int, int]
|
|
) -> list[tuple[int, int]] | None:
|
|
tex_span_choices = sorted(filter(
|
|
lambda tex_span: all([
|
|
tex_span[0] >= custom_span[0],
|
|
tex_span[1] <= custom_span[1]
|
|
]),
|
|
self.tex_span_list
|
|
))
|
|
# Choose spans that reach the farthest.
|
|
tex_span_choices_dict = dict(tex_span_choices)
|
|
|
|
result = []
|
|
span_begin, span_end = custom_span
|
|
span_begin = self.rstrip_span(span_begin)
|
|
span_end = self.rstrip_span(span_end)
|
|
while span_begin != span_end:
|
|
span_begin = self.lstrip_span(span_begin)
|
|
if span_begin not in tex_span_choices_dict.keys():
|
|
return None
|
|
next_begin = tex_span_choices_dict[span_begin]
|
|
result.append((span_begin, next_begin))
|
|
span_begin = next_begin
|
|
return result
|
|
|
|
def get_part_by_custom_span(self, custom_span: tuple[int, int]) -> VGroup:
|
|
tex_spans = self.find_span_components_of_custom_span(
|
|
custom_span
|
|
)
|
|
if tex_spans is None:
|
|
tex = self.string[slice(*custom_span)]
|
|
raise ValueError(f"Failed to match mobjects from tex: \"{tex}\"")
|
|
|
|
labels = set(it.chain(*[
|
|
self.containing_labels_dict[tex_span]
|
|
for tex_span in tex_spans
|
|
]))
|
|
return VGroup(*filter(
|
|
lambda submob: submob.label in labels,
|
|
self.submobjects
|
|
))
|
|
|
|
def get_parts_by_tex(self, tex: str) -> VGroup:
|
|
return VGroup(*[
|
|
self.get_part_by_custom_span(match_obj.span())
|
|
for match_obj in re.finditer(
|
|
re.escape(tex), self.string
|
|
)
|
|
])
|
|
|
|
def get_part_by_tex(self, tex: str, index: int = 0) -> VMobject:
|
|
all_parts = self.get_parts_by_tex(tex)
|
|
return all_parts[index]
|
|
|
|
def set_color_by_tex(self, tex: str, color: ManimColor):
|
|
self.get_parts_by_tex(tex).set_color(color)
|
|
return self
|
|
|
|
def set_color_by_tex_to_color_map(
|
|
self,
|
|
tex_to_color_map: dict[str, ManimColor]
|
|
):
|
|
for tex, color in tex_to_color_map.items():
|
|
self.set_color_by_tex(tex, color)
|
|
return self
|
|
|
|
def indices_of_part(self, part: Iterable[VMobject]) -> list[int]:
|
|
indices = [
|
|
index for index, submob in enumerate(self.submobjects)
|
|
if submob in part
|
|
]
|
|
if not indices:
|
|
raise ValueError("Failed to find part in tex")
|
|
return indices
|
|
|
|
def indices_of_part_by_tex(self, tex: str, index: int = 0) -> list[int]:
|
|
part = self.get_part_by_tex(tex, index=index)
|
|
return self.indices_of_part(part)
|
|
|
|
def get_tex(self) -> str:
|
|
return self.string
|
|
|
|
def get_submob_tex(self) -> list[str]:
|
|
return [
|
|
submob.get_tex()
|
|
for submob in self.submobjects
|
|
]
|
|
|
|
|
|
class MTexText(MTex):
|
|
CONFIG = {
|
|
"tex_environment": None,
|
|
}
|