Initial bricks miniprogram implementation

DESIGN.md

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+# Bricks 微信小程序 - 设计文档
+
+## 架构
+JSON → BricksParser → setData → WXML 递归模板 → 小程序原生渲染
+
+## 核心文件
+- `utils/parser.js` - JSON 解析引擎
+- `utils/http.js` - wx.request 封装
+- `utils/renderer.js` - 事件分发
+- `components/brick/brick.wxml` - 递归模板 (template is="brick")
+- `pages/bricks/bricks.js` - 页面入口
+
+## 组件映射
+| Bricks Widget | 小程序组件 |
+|--------------|----------|
+| Text/Title1-6 | `<text class="title-N">` |
+| HBox/VBox | `<view class="flex-row/flex-col">` |
+| Filler | `<view class="flex-fill">` |
+| KeyinText/Input | `<input>` |
+| Image | `<image>` |
+| Running | `<loading>` |
+| VScrollPanel/HScrollPanel | `<scroll-view scroll-y/x>` |
+| Modal/Popup | `<view class="modal-overlay">` |
+
+## 事件系统
+- urlwidget → wx.navigateTo
+- method → Page 方法调用
+- event → bindtap/catchtap
+- script → wx.request 服务端 RPC
+
+## 限制
+- 包体积 2MB → 分包加载
+- WXML 不支持 innerHTML → 用 template 递归
+- Markdown/Html → 需引入 mp-html 插件

app.js

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+App({
+  globalData: {
+    baseUrl: '',
+    authToken: '',
+    bricks: null
+  },
+  onLaunch() {
+    // 加载 bricks 解析引擎
+    const { BricksParser } = require('./utils/parser')
+    this.globalData.bricks = new BricksParser()
+  },
+  // 工具函数: 对应 JS 版 bricks.extend
+  extend(target, source) {
+    for (let key in source) {
+      if (source.hasOwnProperty(key)) {
+        if (typeof source[key] === 'object' && source[key] !== null && !Array.isArray(source[key])) {
+          target[key] = this.extend(target[key] || {}, source[key])
+        } else {
+          target[key] = source[key]
+        }
+      }
+    }
+    return target
+  },
+  // 模板变量替换: 对应 bricks.obj_fmtstr
+  fmt(str, data) {
+    return str.replace(/\{\{([^}]+)\}\}/g, (match, key) => {
+      return data[key] !== undefined ? data[key] : match
+    })
+  },
+  // entire_url: 拼接 baseUrl
+  entireUrl(path) {
+    const base = this.globalData.baseUrl || ''
+    return base.replace(/\/$/, '') + '/' + path.replace(/^\//, '')
+  }
+})

app.json

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+{
+  "pages": [
+    "pages/bricks/bricks"
+  ],
+  "window": {
+    "navigationBarTitleText": "Bricks",
+    "navigationBarBackgroundColor": "#ffffff"
+  },
+  "style": "v2",
+  "sitemapLocation": "sitemap.json"
+}

app.wxss

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+page {
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+  font-size: 28rpx;
+  color: #333;
+}
+
+/* Flex 布局 - 对应 HBox/VBox */
+.flex-row {
+  display: flex;
+  flex-direction: row;
+  align-items: flex-start;
+}
+.flex-col {
+  display: flex;
+  flex-direction: column;
+}
+.flex-fill {
+  flex: 1;
+}
+.flex-center {
+  justify-content: center;
+  align-items: center;
+}
+.flex-between {
+  justify-content: space-between;
+}
+
+/* 标题 - 对应 Title1-6 */
+.title-1 { font-size: 64rpx; font-weight: bold; }
+.title-2 { font-size: 56rpx; font-weight: bold; }
+.title-3 { font-size: 48rpx; font-weight: semi-bold; }
+.title-4 { font-size: 40rpx; font-weight: medium; }
+.title-5 { font-size: 36rpx; font-weight: medium; }
+.title-6 { font-size: 32rpx; font-weight: medium; }
+
+/* 文本 */
+.text-content { padding: 16rpx 32rpx; line-height: 1.6; }
+
+/* 输入框 */
+.input-field {
+  border: 1rpx solid #ddd;
+  border-radius: 8rpx;
+  padding: 16rpx 24rpx;
+  margin: 16rpx 32rpx;
+  font-size: 28rpx;
+}
+
+/* Loading - 对应 Running */
+.loading {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  padding: 40rpx;
+}
+
+/* 图片 */
+.image-content { width: 100%; height: auto; }
+.icon-content { width: 48rpx; height: 48rpx; }
+
+/* 滚动面板 */
+.scroll-panel { width: 100%; height: 100%; }
+
+/* Modal */
+.modal-overlay {
+  position: fixed;
+  top: 0; left: 0; right: 0; bottom: 0;
+  background: rgba(0,0,0,0.5);
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  z-index: 999;
+}
+.modal-content {
+  background: #fff;
+  border-radius: 16rpx;
+  padding: 32rpx;
+  max-width: 80%;
+}
+
+/* Menu */
+.menu-item {
+  padding: 24rpx 32rpx;
+  border-bottom: 1rpx solid #eee;
+}

components/brick/brick.js

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+/**
+ * Bricks 递归组件逻辑
+ */
+Component({
+  properties: {
+    item: {
+      type: Object,
+      value: {}
+    }
+  },
+  methods: {
+    onEvent(e) {
+      const dataset = e.currentTarget.dataset
+      const { actiontype, target, methodname, url, script } = dataset
+      this.triggerEvent('bricksaction', { actiontype, target, methodname, url, script, event: e })
+    },
+    onInput(e) {
+      this.triggerEvent('inputchange', { value: e.detail.value, widget: this.data.item })
+    },
+    onCloseModal(e) {
+      this.triggerEvent('modalclose')
+    },
+    stopPropagation() {
+      // 阻止冒泡
+    }
+  }
+})

components/brick/brick.json

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+{
+  "component": true,
+  "usingComponents": {}
+}

components/brick/brick.wxml

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+<!--
+  Bricks 递归组件模板
+  通过 template is="brick" data="{{item}}" 递归渲染
+-->
+<template name="brick">
+  <!-- 文本组件 -->
+  <block wx:if="{{item.widgettype === 'Text'}}">
+    <text class="text-content">{{item.options.text}}</text>
+  </block>
+
+  <block wx:if="{{item.widgettype === 'Title1'}}">
+    <text class="title-1">{{item.options.text}}</text>
+  </block>
+  <block wx:if="{{item.widgettype === 'Title2'}}">
+    <text class="title-2">{{item.options.text}}</text>
+  </block>
+  <block wx:if="{{item.widgettype === 'Title3'}}">
+    <text class="title-3">{{item.options.text}}</text>
+  </block>
+  <block wx:if="{{item.widgettype === 'Title4'}}">
+    <text class="title-4">{{item.options.text}}</text>
+  </block>
+  <block wx:if="{{item.widgettype === 'Title5'}}">
+    <text class="title-5">{{item.options.text}}</text>
+  </block>
+  <block wx:if="{{item.widgettype === 'Title6'}}">
+    <text class="title-6">{{item.options.text}}</text>
+  </block>
+
+  <!-- 布局组件 - HBox/VBox -->
+  <block wx:if="{{item.widgettype === 'HBox' || item.widgettype === 'FHBox'}}">
+    <view class="flex-row {{item.widgettype === 'FHBox' ? 'flex-between' : ''}}">
+      <block wx:for="{{item.subwidgets}}" wx:key="widgettype" wx:for-item="child">
+        <template is="brick" data="{{item: child}}" />
+      </block>
+    </view>
+  </block>
+
+  <block wx:if="{{item.widgettype === 'VBox' || item.widgettype === 'FVBox'}}">
+    <view class="flex-col {{item.widgettype === 'FVBox' ? 'flex-between' : ''}}">
+      <block wx:for="{{item.subwidgets}}" wx:key="widgettype" wx:for-item="child">
+        <template is="brick" data="{{item: child}}" />
+      </block>
+    </view>
+  </block>
+
+  <!-- Filler -->
+  <block wx:if="{{item.widgettype === 'Filler' || item.widgettype === 'HFiller' || item.widgettype === 'VFiller'}}">
+    <view class="flex-fill"></view>
+  </block>
+
+  <!-- 输入组件 -->
+  <block wx:if="{{item.widgettype === 'KeyinText'}}">
+    <input class="input-field" placeholder="{{item.options.placeholder}}" value="{{item.options.value || item.options.text}}" bindinput="onInput" data-widget="{{item}}" />
+  </block>
+
+  <block wx:if="{{item.widgettype === 'Input'}}">
+    <block wx:if="{{item.options.type === 'password'}}">
+      <input class="input-field" type="idcard" placeholder="{{item.options.placeholder}}" password="{{true}}" />
+    </block>
+    <block wx:else>
+      <input class="input-field" placeholder="{{item.options.placeholder}}" value="{{item.options.value}}" />
+    </block>
+  </block>
+
+  <!-- 图片 -->
+  <block wx:if="{{item.widgettype === 'Image'}}">
+    <image class="image-content" src="{{item.options.src}}" mode="{{item.options.mode || 'aspectFit'}}" />
+  </block>
+
+  <!-- Icon -->
+  <block wx:if="{{item.widgettype === 'Icon' || item.widgettype === 'StatedIcon'}}">
+    <image class="icon-content" src="{{item.options.src}}" />
+  </block>
+
+  <!-- Running (Loading) -->
+  <block wx:if="{{item.widgettype === 'Running'}}">
+    <view class="loading">
+      <loading />
+    </view>
+  </block>
+
+  <!-- Scroll -->
+  <block wx:if="{{item.widgettype === 'VScrollPanel'}}">
+    <scroll-view class="scroll-panel" scroll-y="true">
+      <block wx:for="{{item.subwidgets}}" wx:key="widgettype" wx:for-item="child">
+        <template is="brick" data="{{item: child}}" />
+      </block>
+    </scroll-view>
+  </block>
+
+  <block wx:if="{{item.widgettype === 'HScrollPanel'}}">
+    <scroll-view class="scroll-panel" scroll-x="true">
+      <block wx:for="{{item.subwidgets}}" wx:key="widgettype" wx:for-item="child">
+        <template is="brick" data="{{item: child}}" />
+      </block>
+    </scroll-view>
+  </block>
+
+  <!-- Modal -->
+  <block wx:if="{{item.widgettype === 'Modal' || item.widgettype === 'Popup'}}">
+    <view class="modal-overlay" wx:if="{{item.options.visible}}" catchtap="onCloseModal">
+      <view class="modal-content" catchtap="stopPropagation">
+        <block wx:for="{{item.subwidgets}}" wx:key="widgettype" wx:for-item="child">
+          <template is="brick" data="{{item: child}}" />
+        </block>
+      </view>
+    </view>
+  </block>
+
+  <!-- 默认: 递归子组件 -->
+  <block wx:if="{{item.subwidgets && item.subwidgets.length > 0 && item.widgettype !== 'HBox' && item.widgettype !== 'FHBox' && item.widgettype !== 'VBox' && item.widgettype !== 'FVBox' && item.widgettype !== 'VScrollPanel' && item.widgettype !== 'HScrollPanel' && item.widgettype !== 'Modal' && item.widgettype !== 'Popup'}}">
+    <block wx:for="{{item.subwidgets}}" wx:key="widgettype" wx:for-item="child">
+      <template is="brick" data="{{item: child}}" />
+    </block>
+  </block>
+</template>

components/brick/brick.wxss

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+/* 组件样式继承 app.wxss */

pages/bricks/bricks.js

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+/**
+ * Bricks 页面入口
+ */
+const { BricksParser } = require('../../utils/parser')
+const { BricksHttp } = require('../../utils/http')
+const { BricksRenderer } = require('../../utils/renderer')
+
+Page({
+  data: {
+    tree: null
+  },
+
+  onLoad(options) {
+    this.parser = new BricksParser()
+    this.http = new BricksHttp()
+    this.renderer = new BricksRenderer(this)
+
+    // 从 URL 参数加载 JSON
+    if (options.url) {
+      this.loadFromUrl(decodeURIComponent(options.url))
+    } else if (options.json) {
+      this.loadFromJson(decodeURIComponent(options.json))
+    } else {
+      // 加载默认示例
+      this.loadDefault()
+    }
+  },
+
+  async loadFromUrl(url) {
+    try {
+      const json = await this.http.get(url)
+      const widgetTree = this.parser.parse(JSON.stringify(json))
+      this.renderer.render(widgetTree)
+    } catch (e) {
+      console.error('[Bricks] Load failed:', e)
+    }
+  },
+
+  loadFromJson(jsonString) {
+    const widgetTree = this.parser.parse(jsonString)
+    if (widgetTree) this.renderer.render(widgetTree)
+  },
+
+  loadDefault() {
+    const defaultJson = JSON.stringify({
+      widgettype: 'VBox',
+      subwidgets: [
+        { widgettype: 'Title1', options: { text: '欢迎使用 Bricks' } },
+        { widgettype: 'Text', options: { text: 'JSON 驱动的跨平台 UI 框架' } },
+        { widgettype: 'KeyinText', options: { placeholder: '请输入...' } },
+        {
+          widgettype: 'HBox',
+          subwidgets: [
+            { widgettype: 'Text', options: { text: '左侧' } },
+            { widgettype: 'Filler' },
+            { widgettype: 'Text', options: { text: '右侧' } }
+          ]
+        }
+      ]
+    })
+    this.loadFromJson(defaultJson)
+  },
+
+  onBricksAction(e) {
+    const { actiontype, url, methodname } = e.detail
+    if (actiontype === 'urlwidget' && url) {
+      wx.navigateTo({ url: '/pages/bricks/bricks?url=' + encodeURIComponent(url) })
+    }
+  },
+
+  onInputChange(e) {
+    console.log('[Bricks] Input:', e.detail.value)
+  }
+})

pages/bricks/bricks.json

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+{
+  "navigationBarTitleText": "Bricks",
+  "usingComponents": {
+    "brick": "/components/brick/brick"
+  }
+}

pages/bricks/bricks.wxml

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+<!--
+  Bricks 页面入口
+  引入递归模板，渲染整个 widget 树
+-->
+<import src="/components/brick/brick.wxml" />
+
+<view class="page-container">
+  <!-- 递归渲染 -->
+  <template is="brick" data="{{item: tree}}" />
+</view>

pages/bricks/bricks.wxss

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+@import "/app.wxss";
+
+.page-container {
+  width: 100%;
+  min-height: 100vh;
+  background: #fff;
+}

project.config.json

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+{
+  "description": "Bricks 微信小程序",
+  "packOptions": {
+    "ignore": [],
+    "include": []
+  },
+  "setting": {
+    "bundle": false,
+    "userConfirmedBundleSwitch": false,
+    "urlCheck": true,
+    "scopeDataCheck": false,
+    "coverView": true,
+    "es6": true,
+    "postcss": true,
+    "compileHotReLoad": false,
+    "lazyloadPlaceholderEnable": false,
+    "preloadBackgroundData": false,
+    "minified": true,
+    "autoAudits": false,
+    "newFeature": false,
+    "uglifyFileName": false,
+    "uploadWithSourceMap": true,
+    "useIsolateContext": true,
+    "nodeModules": false,
+    "enhance": true,
+    "useMultiFrameRuntime": true,
+    "showShadowRootInWxmlPanel": true,
+    "packNpmManually": false,
+    "enableEngp": false,
+    "packNpmRelationList": [],
+    "minifyWXSS": true,
+    "showES6CompileOption": false,
+    "minifyWXML": true,
+    "babelSetting": {
+      "ignore": [],
+      "disablePlugins": [],
+      "outputPath": ""
+    }
+  },
+  "compileType": "miniprogram",
+  "condition": {}
+}

sitemap.json

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+{
+  "desc": "关于本文件的更多信息，请参考文档 https://developers.weixin.qq.com/miniprogram/dev/framework/sitemap.html",
+  "rules": [{ "action": "allow", "page": "*" }]
+}

utils/http.js

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+/**
+ * HTTP 请求封装 - 对应 JS 版 bricks.HttpJson/HttpText
+ */
+const app = getApp()
+
+class BricksHttp {
+  /**
+   * GET 请求
+   */
+  get(url, params = {}) {
+    return new Promise((resolve, reject) => {
+      const fullUrl = app.entireUrl(url)
+      wx.request({
+        url: fullUrl,
+        data: params,
+        method: 'GET',
+        header: {
+          'Content-Type': 'application/json',
+          'Authorization': app.globalData.authToken ? `Bearer ${app.globalData.authToken}` : ''
+        },
+        success: (res) => {
+          if (res.statusCode === 200) resolve(res.data)
+          else reject(new Error(`HTTP ${res.statusCode}`))
+        },
+        fail: (err) => reject(err)
+      })
+    })
+  }
+
+  /**
+   * POST 请求
+   */
+  post(url, data = {}) {
+    return new Promise((resolve, reject) => {
+      const fullUrl = app.entireUrl(url)
+      wx.request({
+        url: fullUrl,
+        data: JSON.stringify(data),
+        method: 'POST',
+        header: {
+          'Content-Type': 'application/json',
+          'Authorization': app.globalData.authToken ? `Bearer ${app.globalData.authToken}` : ''
+        },
+        success: (res) => {
+          if (res.statusCode === 200) resolve(res.data)
+          else reject(new Error(`HTTP ${res.statusCode}`))
+        },
+        fail: (err) => reject(err)
+      })
+    })
+  }
+}
+
+module.exports = { BricksHttp }

utils/parser.js

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+/**
+ * Bricks JSON 解析引擎
+ * 将 bricks JSON 解析为小程序可渲染的数据结构
+ */
+class BricksParser {
+  constructor() {
+    this.widgetTree = null
+  }
+
+  /**
+   * 解析 JSON 字符串
+   */
+  parse(jsonString) {
+    try {
+      const obj = JSON.parse(jsonString)
+      this.widgetTree = this._parseNode(obj)
+      return this.widgetTree
+    } catch (e) {
+      console.error('[Bricks] Parse error:', e)
+      return null
+    }
+  }
+
+  /**
+   * 递归解析节点
+   */
+  _parseNode(obj) {
+    if (!obj || typeof obj !== 'object') return null
+
+    const node = {
+      widgettype: obj.widgettype || 'Text',
+      options: obj.options || {},
+      binds: obj.binds || [],
+      subwidgets: [],
+      // 扁平化事件数据，方便 WXML 绑定
+      _hasBind: (obj.binds && obj.binds.length > 0),
+      _bindData: obj.binds ? obj.binds.map(b => ({
+        event: b.event || 'tap',
+        actiontype: b.actiontype,
+        target: b.target,
+        methodname: b.methodname || b.method,
+        params: b.params,
+        url: b.url || (b.options && b.options.url),
+        script: b.script
+      })) : []
+    }
+
+    // 递归处理子组件
+    if (obj.subwidgets && Array.isArray(obj.subwidgets)) {
+      node.subwidgets = obj.subwidgets.map(child => this._parseNode(child))
+    }
+
+    return node
+  }
+
+  /**
+   * 解析多个 JSON（如分页加载）
+   */
+  parseList(jsonArray) {
+    return jsonArray.map(json => {
+      if (typeof json === 'string') return this.parse(json)
+      return this._parseNode(json)
+    })
+  }
+}
+
+module.exports = { BricksParser }

utils/renderer.js

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+/**
+ * 渲染适配 - 处理事件分发和 actiontype
+ */
+const app = getApp()
+
+class BricksRenderer {
+  constructor(page) {
+    this.page = page
+    this.widgetTree = null
+  }
+
+  /**
+   * 渲染 widget 树
+   */
+  render(widgetTree) {
+    this.widgetTree = widgetTree
+    this.page.setData({
+      tree: widgetTree,
+      treeData: [widgetTree] // WXML 需要数组形式
+    })
+  }
+
+  /**
+   * 处理事件绑定
+   */
+  onEvent(e) {
+    const { actiontype, target, methodname, url, script } = e.currentTarget.dataset
+    console.log('[Bricks] Event:', actiontype, target)
+
+    switch (actiontype) {
+      case 'urlwidget':
+        this._handleUrlWidget(url)
+        break
+      case 'method':
+        this._handleMethod(methodname, e)
+        break
+      case 'script':
+        this._handleScript(script)
+        break
+      case 'event':
+        this._handleEvent(e)
+        break
+      default:
+        console.log('[Bricks] Unknown actiontype:', actiontype)
+    }
+  }
+
+  _handleUrlWidget(url) {
+    if (!url) return
+    wx.navigateTo({ url: '/pages/bricks/bricks?url=' + encodeURIComponent(url) })
+  }
+
+  _handleMethod(methodname, e) {
+    if (methodname && this.page[methodname]) {
+      this.page[methodname](e)
+    }
+  }
+
+  _handleScript(script) {
+    console.log('[Bricks] Script:', script)
+  }
+
+  _handleEvent(e) {
+    console.log('[Bricks] Event data:', e.detail)
+  }
+}
+
+module.exports = { BricksRenderer }