From cd646824c220a22e2de425019d236a3188c0aea0 Mon Sep 17 00:00:00 2001
From: Aex <adaex@qq.com>
Date: Sat, 30 Oct 2021 21:23:29 +0800
Subject: [PATCH] feat(components): el-switch add inline content support
 (#4091)

* refactor(components): el-swtich custom texts and icons

* fix: test

* fix: font size

* fix: example margin

* feat(components): el-switch add inline-prompt support

* revert: paly

* docs: update icons

* feat: add inner text

* fix: switch test

* refactor: icon inline
---
 docs/en-US/component/switch.md                | 13 ++++-
 docs/examples/switch/custom-icons.vue         | 20 ++++++--
 docs/examples/switch/text-description.vue     | 15 +++++-
 .../switch/__tests__/switch.spec.ts           | 19 +++++++
 packages/components/switch/src/index.vue      | 45 ++++++++++++++++-
 packages/theme-chalk/src/switch.scss          | 49 ++++++++++++++++++-
 6 files changed, 151 insertions(+), 10 deletions(-)

diff --git a/docs/en-US/component/switch.md b/docs/en-US/component/switch.md
index 56757670cc..6745df3603 100644
--- a/docs/en-US/component/switch.md
+++ b/docs/en-US/component/switch.md
@@ -7,6 +7,14 @@ lang: en-US
 
 Switch is used for switching between two opposing states.
 
+<style lang="scss">
+.example-showcase {
+  .el-switch + .el-switch {
+    margin-left: 10px;
+  }
+}
+</style>
+
 ## Basic usage
 
 :::demo Bind `v-model` to a `Boolean` typed variable. The `active-color` and `inactive-color` attribute decides the background color in two states.
@@ -17,6 +25,8 @@ switch/basic
 
 ## Text description
 
+You can add `active-text` and `inactive-text` attribute to show texts. use `inline-prompt` attribute to control text is displayed inside dot.
+
 :::demo You can add `active-text` and `inactive-text` attribute to show texts.
 
 switch/text-description
@@ -31,7 +41,7 @@ Use the `active-icon` and `active-icon` attribute to add icon. You can pass eith
 
 :::
 
-:::demo You can add `active-icon` and `active-icon` attribute to show icons.
+:::demo You can add `active-icon` and `inactive-icon` attribute to show icons. use `inline-prompt` attribute to control icon is displayed inside dot.
 
 switch/custom-icons
 
@@ -77,6 +87,7 @@ switch/prevent-switching
 | disabled              | whether Switch is disabled                                                                                                                      | boolean                   | —               | false   |
 | loading               | whether Switch is in loading state                                                                                                              | boolean                   | —               | false   |
 | width                 | width of Switch                                                                                                                                 | number                    | —               | 40      |
+| inline-prompt         | whether icon or text is displayed inside dot                                                                                                    | boolean                   | —               | false   |
 | active-icon           | component of the icon displayed when in `on` state, overrides `active-text`                                                                     | string / Component        | —               | —       |
 | inactive-icon         | component of the icon displayed when in `off` state, overrides `inactive-text`                                                                  | string / Component        | —               | —       |
 | active-text           | text displayed when in `on` state                                                                                                               | string                    | —               | —       |
diff --git a/docs/examples/switch/custom-icons.vue b/docs/examples/switch/custom-icons.vue
index aa3bc2ba87..7084c475cf 100644
--- a/docs/examples/switch/custom-icons.vue
+++ b/docs/examples/switch/custom-icons.vue
@@ -1,16 +1,26 @@
 <template>
-  <el-switch v-model="value" :active-icon="active" :inactive-icon="inactive">
+  <el-switch v-model="value1" :active-icon="active" :inactive-icon="inactive">
+  </el-switch>
+  <br />
+  <el-switch
+    v-model="value2"
+    style="margin-left: 24px"
+    inline-prompt
+    :active-icon="active"
+    :inactive-icon="inactive"
+  >
   </el-switch>
 </template>
 
 <script lang="ts">
-import { CircleCheckFilled, CircleCloseFilled } from '@element-plus/icons'
+import { Check, Close } from '@element-plus/icons'
 export default {
   data() {
     return {
-      value: true,
-      active: CircleCheckFilled,
-      inactive: CircleCloseFilled,
+      value1: true,
+      value2: true,
+      active: Check,
+      inactive: Close,
     }
   },
 }
diff --git a/docs/examples/switch/text-description.vue b/docs/examples/switch/text-description.vue
index fd1c871adc..518d783846 100644
--- a/docs/examples/switch/text-description.vue
+++ b/docs/examples/switch/text-description.vue
@@ -5,14 +5,25 @@
     inactive-text="Pay by year"
   >
   </el-switch>
+  <br />
   <el-switch
     v-model="value2"
-    style="display: block"
     active-color="#13ce66"
     inactive-color="#ff4949"
     active-text="Pay by month"
     inactive-text="Pay by year"
   />
+  <br />
+  <el-switch v-model="value3" inline-prompt active-text="是" inactive-text="否">
+  </el-switch>
+  <el-switch
+    v-model="value4"
+    inline-prompt
+    active-color="#13ce66"
+    inactive-color="#ff4949"
+    active-text="Y"
+    inactive-text="N"
+  />
 </template>
 
 <script lang="ts">
@@ -21,6 +32,8 @@ export default {
     return {
       value1: true,
       value2: true,
+      value3: true,
+      value4: true,
     }
   },
 }
diff --git a/packages/components/switch/__tests__/switch.spec.ts b/packages/components/switch/__tests__/switch.spec.ts
index 307016befb..d3b9bf044b 100644
--- a/packages/components/switch/__tests__/switch.spec.ts
+++ b/packages/components/switch/__tests__/switch.spec.ts
@@ -24,6 +24,25 @@ describe('Switch.vue', () => {
     expect(leftLabelWrapper.text()).toEqual('off')
   })
 
+  test('inline prompt', () => {
+    const wrapper = mount(Switch, {
+      props: {
+        inlinePrompt: true,
+        activeText: 'on',
+        inactiveText: 'off',
+        activeColor: '#0f0',
+        inactiveColor: '#f00',
+        width: 100,
+      },
+    })
+    const vm = wrapper.vm
+    const coreEl = vm.$el.querySelector('.el-switch__core')
+    expect(coreEl.style.backgroundColor).toEqual('rgb(255, 0, 0)')
+    expect(coreEl.style.width).toEqual('100px')
+    const leftLabelWrapper = wrapper.find('.el-switch__inner span')
+    expect(leftLabelWrapper.text()).toEqual('o')
+  })
+
   test('switch with icons', () => {
     const wrapper = mount(Switch, {
       props: {
diff --git a/packages/components/switch/src/index.vue b/packages/components/switch/src/index.vue
index 08fabec2e8..bcc5ebefd8 100644
--- a/packages/components/switch/src/index.vue
+++ b/packages/components/switch/src/index.vue
@@ -20,7 +20,7 @@
       @keydown.enter="switchValue"
     />
     <span
-      v-if="inactiveIcon || inactiveText"
+      v-if="!inlinePrompt && (inactiveIcon || inactiveText)"
       :class="[
         'el-switch__label',
         'el-switch__label--left',
@@ -37,12 +37,48 @@
       class="el-switch__core"
       :style="{ width: (width || 40) + 'px' }"
     >
+      <div v-if="inlinePrompt" class="el-switch__inner">
+        <template v-if="activeIcon || inactiveIcon">
+          <el-icon
+            v-if="activeIcon"
+            class="is-icon"
+            :class="checked ? 'is-show' : 'is-hide'"
+          >
+            <component :is="activeIcon" />
+          </el-icon>
+          <el-icon
+            v-if="inactiveIcon"
+            class="is-icon"
+            :class="!checked ? 'is-show' : 'is-hide'"
+          >
+            <component :is="inactiveIcon" />
+          </el-icon>
+        </template>
+        <template v-else-if="activeText || inactiveIcon">
+          <span
+            v-if="activeText"
+            class="is-text"
+            :class="checked ? 'is-show' : 'is-hide'"
+            :aria-hidden="!checked"
+          >
+            {{ activeText.substr(0, 1) }}
+          </span>
+          <span
+            v-if="inactiveText"
+            class="is-text"
+            :class="!checked ? 'is-show' : 'is-hide'"
+            :aria-hidden="checked"
+          >
+            {{ inactiveText.substr(0, 1) }}
+          </span>
+        </template>
+      </div>
       <div class="el-switch__action">
         <el-icon v-if="loading" class="is-loading"><loading /></el-icon>
       </div>
     </span>
     <span
-      v-if="activeIcon || activeText"
+      v-if="!inlinePrompt && (activeIcon || activeText)"
       :class="[
         'el-switch__label',
         'el-switch__label--right',
@@ -56,6 +92,7 @@
     </span>
   </div>
 </template>
+
 <script lang="ts">
 import {
   defineComponent,
@@ -119,6 +156,10 @@ export default defineComponent({
       type: Number,
       default: 40,
     },
+    inlinePrompt: {
+      type: Boolean,
+      default: false,
+    },
     activeIcon: {
       type: [String, Object] as PropType<string | Component>,
       default: '',
diff --git a/packages/theme-chalk/src/switch.scss b/packages/theme-chalk/src/switch.scss
index 70eb4f5969..0a69fa332d 100644
--- a/packages/theme-chalk/src/switch.scss
+++ b/packages/theme-chalk/src/switch.scss
@@ -49,7 +49,10 @@
       display: inline-block;
     }
     .#{$namespace}-icon {
-      vertical-align: text-bottom;
+      height: inherit;
+      svg {
+        vertical-align: middle;
+      }
     }
   }
 
@@ -77,6 +80,27 @@
       background-color var(--el-transition-duration);
     vertical-align: middle;
 
+    .#{$namespace}-switch__inner {
+      position: absolute;
+      top: 1px;
+      left: 1px;
+      transition: all var(--el-transition-duration);
+      width: var(--el-switch-button-size);
+      height: var(--el-switch-button-size);
+      display: flex;
+      justify-content: center;
+      align-items: center;
+      left: 50%;
+
+      .is-icon,
+      .is-text {
+        color: var(--el-color-white);
+        transition: opacity var(--el-transition-duration);
+        position: absolute;
+        user-select: none;
+      }
+    }
+
     .#{$namespace}-switch__action {
       position: absolute;
       top: 1px;
@@ -90,6 +114,25 @@
       justify-content: center;
       align-items: center;
       color: var(--el-switch-off-color);
+
+      .is-icon,
+      .is-text {
+        transition: opacity var(--el-transition-duration);
+        position: absolute;
+        user-select: none;
+      }
+    }
+
+    .is-text {
+      font-size: 12px;
+    }
+
+    .is-show {
+      opacity: 1;
+    }
+
+    .is-hide {
+      opacity: 0;
     }
   }
 
@@ -102,6 +145,10 @@
         margin-left: calc(-1px - var(--el-switch-button-size));
         color: var(--el-switch-on-color);
       }
+      .#{$namespace}-switch__inner {
+        left: 50%;
+        margin-left: calc(-1px - var(--el-switch-button-size));
+      }
     }
   }