feat(ConfigProvider): add config-provider component (#4279)

example/app.json

@@ -51,7 +51,8 @@
     "pages/divider/index",
     "pages/empty/index",
     "pages/calendar/index",
-    "pages/share-sheet/index"
+    "pages/share-sheet/index",
+    "pages/config-provider/index"
   ],
   "window": {
     "navigationBarBackgroundColor": "#f8f8f8",
@@ -125,7 +126,8 @@
     "van-dropdown-item": "./dist/dropdown-item/index",
     "van-skeleton": "./dist/skeleton/index",
     "van-calendar": "./dist/calendar/index",
-    "van-share-sheet": "./dist/share-sheet/index"
+    "van-share-sheet": "./dist/share-sheet/index",
+    "van-config-provider": "./dist/config-provider/index"
   },
   "sitemapLocation": "sitemap.json"
 }

example/config.js

@@ -11,6 +11,10 @@ export default [
         path: '/cell',
         title: 'Cell 单元格',
       },
+      {
+        path: '/config-provider',
+        title: 'ConfigProvider 全局配置',
+      },
       {
         path: '/icon',
         title: 'Icon 图标',

example/pages/config-provider/index.js

@@ -0,0 +1,24 @@
+import Page from '../../common/page';
+
+Page({
+  data: {
+    rate: 4,
+    slider: 50,
+    themeVars: {
+      rateIconFullColor: '#07c160',
+      sliderBarHeight: '4px',
+      sliderButtonWidth: '20px',
+      sliderButtonHeight: '20px',
+      sliderActiveBackgroundColor: '#07c160',
+      buttonPrimaryBorderColor: '#07c160',
+      buttonPrimaryBackgroundColor: '#07c160',
+    },
+  },
+
+  onChange(event) {
+    const { key } = event.currentTarget.dataset;
+    this.setData({
+      [key]: event.detail,
+    });
+  },
+});

example/pages/config-provider/index.json

@@ -0,0 +1,3 @@
+{
+  "navigationBarTitleText": "ConfigProvider 全局配置"
+}

example/pages/config-provider/index.wxml

@@ -0,0 +1,39 @@
+<demo-block title="默认主题">
+  <van-cell-group>
+    <van-field label="评分">
+      <view slot="input" style="width: 100%">
+        <van-rate model:value="{{ rate }}" data-key="rate" bind:change="onChange" />
+      </view>
+    </van-field>
+    <van-field label="滑块" border="{{ false }}">
+      <view slot="input" style="width: 100%">
+        <van-slider value="{{ slider }}" data-key="slider" bind:change="onChange" />
+      </view>
+    </van-field>
+  </van-cell-group>
+
+  <view style="margin: 16px">
+    <van-button round block type="primary">提交</van-button>
+  </view>
+</demo-block>
+
+<demo-block title="定制主题">
+  <van-config-provider theme-vars="{{ themeVars }}">
+    <van-cell-group>
+      <van-field label="评分">
+        <view slot="input" style="width: 100%">
+          <van-rate model:value="{{ rate }}" data-key="rate" bind:change="onChange" />
+        </view>
+      </van-field>
+      <van-field label="滑块" border="{{ false }}">
+        <view slot="input" style="width: 100%">
+          <van-slider value="{{ slider }}" data-key="slider" bind:change="onChange" />
+        </view>
+      </van-field>
+    </van-cell-group>
+
+    <view style="margin: 16px">
+      <van-button round block type="primary">提交</van-button>
+    </view>
+  </van-config-provider>
+</demo-block>

example/project.config.json

@@ -92,6 +92,12 @@
           "pathName": "pages/cell/index",
           "query": ""
         },
+        {
+          "id": -1,
+          "name": "config-provider",
+          "pathName": "pages/config-provider/index",
+          "query": ""
+        },
         {
           "id": -1,
           "name": "card",

packages/config-provider/README.md

@@ -0,0 +1,106 @@
+# ConfigProvider 全局配置
+
+### 介绍
+
+用于配置 Vant Weapp 组件的主题样式，从 `v1.7.0` 版本开始支持。
+
+### 引入
+
+在`app.json`或`index.json`中引入组件，详细介绍见[快速上手](#/quickstart#yin-ru-zu-jian)。
+
+```json
+"usingComponents": {
+  "van-config-provider": "@vant/weapp/config-provider/index"
+}
+```
+
+## 定制主题
+
+### 介绍
+
+Vant Weapp 组件通过丰富的 [CSS 变量](https://developer.mozilla.org/zh-CN/docs/Web/CSS/Using_CSS_custom_properties) 来组织样式，通过覆盖这些 CSS 变量，可以实现**定制主题、动态切换主题**等效果。
+
+#### 示例
+
+以 Button 组件为例，查看组件的样式，可以看到 `.van-button--primary` 类名上存在以下变量：
+
+```css
+.van-button--primary {
+  color: var(--button-primary-color,#fff);
+  background: var(--button-primary-background-color,#07c160);
+  border: var(--button-border-width,1px) solid var(--button-primary-border-color,#07c160);
+}
+```
+
+### 自定义 CSS 变量
+
+#### 通过 CSS 覆盖
+
+你可以直接在代码中覆盖这些 CSS 变量，Button 组件的样式会随之发生改变：
+
+```css
+/* 添加这段样式后，Primary Button 会变成红色 */
+page {
+  --button-primary-background-color: red;
+}
+```
+
+#### 通过 ConfigProvider 覆盖
+
+`ConfigProvider` 组件提供了覆盖 CSS 变量的能力，你需要在根节点包裹一个 `ConfigProvider` 组件，并通过 `theme-vars` 属性来配置一些主题变量。
+
+```html
+<van-config-provider theme-vars="{{ themeVars }}">
+  <van-cell-group>
+    <van-field label="评分">
+      <view slot="input" style="width: 100%">
+        <van-rate model:value="{{ rate }}" data-key="rate" bind:change="onChange" />
+      </view>
+    </van-field>
+    <van-field label="滑块" border="{{ false }}">
+      <view slot="input" style="width: 100%">
+        <van-slider value="{{ slider }}" data-key="slider" bind:change="onChange" />
+      </view>
+    </van-field>
+  </van-cell-group>
+
+  <view style="margin: 16px">
+    <van-button round block type="primary">提交</van-button>
+  </view>
+</van-config-provider>
+```
+
+```js
+import Page from '../../common/page';
+
+Page({
+  data: {
+    rate: 4,
+    slider: 50,
+    themeVars: {
+      rateIconFullColor: '#07c160',
+      sliderBarHeight: '4px',
+      sliderButtonWidth: '20px',
+      sliderButtonHeight: '20px',
+      sliderActiveBackgroundColor: '#07c160',
+      buttonPrimaryBorderColor: '#07c160',
+      buttonPrimaryBackgroundColor: '#07c160',
+    }
+  },
+
+  onChange(event) {
+    const { key } = event.currentTarget.dataset;
+    this.setData({
+      [key]: event.detail,
+    });
+  }
+});
+```
+
+## API
+
+### Props
+
+| 参数       | 说明           | 类型     | 默认值 |
+| ---------- | -------------- | -------- | ------ |
+| theme-vars | 自定义主题变量 | _object_ | -      |

packages/config-provider/index.json

@@ -0,0 +1,3 @@
+{
+  "component": true
+}

packages/config-provider/index.ts

@@ -0,0 +1,10 @@
+import { VantComponent } from '../common/component';
+
+VantComponent({
+  props: {
+    themeVars: {
+      type: Object,
+      value: {},
+    },
+  },
+});

packages/config-provider/index.wxml

@@ -0,0 +1,5 @@
+<wxs src="./index.wxs" module="computed" />
+
+<view class="van-config-provider" style="{{ computed.mapThemeVarsToCSSVars(themeVars) }}">
+  <slot />
+</view>

packages/config-provider/index.wxs

@@ -0,0 +1,29 @@
+/* eslint-disable */
+var object = require('../wxs/object.wxs');
+var style = require('../wxs/style.wxs');
+
+function kebabCase(word) {
+  var newWord = word
+    .replace(getRegExp("[A-Z]", 'g'), function (i) {
+      return '-' + i;
+    })
+    .toLowerCase()
+    .replace(getRegExp("^-"), '');
+
+  return newWord;
+}
+
+function mapThemeVarsToCSSVars(themeVars) {
+  var cssVars = {};
+  object.keys(themeVars).forEach(function (key) {
+    var cssVarsKey = '--' + kebabCase(key);
+    cssVars[cssVarsKey] = themeVars[key];
+  });
+
+  return style(cssVars);
+}
+
+module.exports = {
+  kebabCase: kebabCase,
+  mapThemeVarsToCSSVars: mapThemeVarsToCSSVars,
+};

vant.config.js

@@ -72,6 +72,10 @@ module.exports = {
             path: 'cell',
             title: 'Cell 单元格',
           },
+          {
+            path: 'config-provider',
+            title: 'ConfigProvider 全局配置',
+          },
           {
             path: 'icon',
             title: 'Icon 图标',