From 3c795256e838c0e7c30c5f3282e9d010d4e2536c Mon Sep 17 00:00:00 2001
From: ZF sun <34314687@qq.com>
Date: Sat, 20 Dec 2025 15:57:11 +0800
Subject: [PATCH] =?UTF-8?q?chore(js):=20=E6=96=B0=E5=A2=9Enavigation.js?=
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---
 common/js/navigation.js | 288 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 288 insertions(+)
 create mode 100644 common/js/navigation.js

diff --git a/common/js/navigation.js b/common/js/navigation.js
new file mode 100644
index 0000000..0550cd0
--- /dev/null
+++ b/common/js/navigation.js
@@ -0,0 +1,288 @@
+import { EventSafety } from './event-safety'
+
+export class NavigationHelper {
+  constructor() {
+    this.navigationCache = new Map()
+  }
+
+  // 安全地获取导航栏高度
+  async getNavigationHeight(component, options = {}) {
+    const cacheKey = `nav_height`
+
+    // 检查缓存
+    if (this.navigationCache.has(cacheKey) && !options.forceRefresh) {
+      return this.navigationCache.get(cacheKey)
+    }
+
+    // 获取高度
+    try {
+      // 尝试直接获取 uni-page-head
+      const height = await this.getDirectNavigationHeight(component)
+      if (height > 0) {
+        this.navigationCache.set(cacheKey, height)
+        return height
+      }
+      
+      // 备用方案：平台特定方法
+      const platformHeight = await this.getPlatformNavigationHeight()
+      this.navigationCache.set(cacheKey, platformHeight)
+      return platformHeight
+    } catch (error) {
+      console.warn('获取导航栏高度失败，使用默认值:', error)
+      const defaultHeight = this.getDefaultNavHeight()
+      this.navigationCache.set(cacheKey, defaultHeight)
+      return defaultHeight
+    }
+  }
+  
+  // 直接查询导航栏高度
+  getDirectNavigationHeight(component) {
+    return new Promise((resolve) => {
+      const query = uni.createSelectorQuery().in(component)
+      
+      query.select('.uni-page-head').boundingClientRect((rect) => {
+        if (rect && rect.height > 0) {
+          console.log('直接查询导航栏高度成功:', rect.height)
+          resolve(rect.height)
+        } else {
+          console.warn('未找到 uni-page-head 元素或高度为0')
+          resolve(0)
+        }
+      }).exec()
+    })
+  }
+  
+  // 平台特定的高度获取
+  getPlatformNavigationHeight() {
+    return new Promise((resolve) => {
+      // #ifdef MP-WEIXIN
+      // 微信小程序精确计算
+      try {
+        const menuButtonInfo = wx.getMenuButtonBoundingClientRect()
+        const systemInfo = uni.getSystemInfoSync()
+        
+        const height = menuButtonInfo.bottom + 
+                      (menuButtonInfo.top - systemInfo.statusBarHeight)
+        console.log('微信小程序导航栏高度:', height)                    
+        resolve(height)
+      } catch (error) {
+        console.error('微信小程序高度计算失败:', error)
+        resolve(44)
+      }
+
+      // #endif
+      
+      // #ifdef H5
+      // H5环境：尝试获取自定义导航栏或使用默认值
+      if (typeof document !== 'undefined') {
+        const customNav = document.querySelector('.uni-page-head')
+        if (customNav) {
+          resolve(customNav.offsetHeight)
+        } else {
+          resolve(44) // 默认导航栏高度
+        }
+      } else {
+        resolve(44)
+      }
+      // #endif
+      
+      // #ifdef APP-PLUS
+      // App端：状态栏 + 导航栏
+      try {
+        const statusBarHeight = plus.navigator.getStatusbarHeight()
+        resolve(statusBarHeight + 44)
+      } catch (error) {
+        console.error('App端高度获取失败:', error)
+        resolve(88)
+      }
+      // #endif
+      
+      // 默认值
+      resolve(44)
+    })
+  }
+  
+  // 获取默认高度
+  getDefaultHeight() {
+    // #ifdef MP-WEIXIN
+    return 44 // 微信小程序默认
+    // #endif
+    // #ifdef H5
+    return 44 // H5默认
+    // #endif
+    // #ifdef APP-PLUS
+    return 88 // App默认（状态栏44 + 导航栏44）
+    // #endif
+    return 44
+  }
+  
+  // 获取状态栏高度
+  getStatusBarHeight() {
+    // #ifdef MP-WEIXIN
+    const systemInfo = uni.getSystemInfoSync()
+    return systemInfo.statusBarHeight || 20
+    // #endif
+    // #ifdef H5
+    return 0 // H5通常没有状态栏
+    // #endif
+    // #ifdef APP-PLUS
+    try {
+      return plus.navigator.getStatusbarHeight()
+    } catch (error) {
+      return 44
+    }
+    // #endif
+    return 0
+  }
+
+  // 获取安全区域
+  getSafeAreaInsets() {
+    try {
+      const systemInfo = uni.getSystemInfoSync()
+      return systemInfo.safeArea || {
+        top: 0,
+        bottom: 0,
+        left: 0,
+        right: 0
+      }
+    } catch (error) {
+      return {
+        top: 0,
+        bottom: 0,
+        left: 0,
+        right: 0
+      }
+    }
+  } 
+
+  // 创建安全的事件处理器
+  createSafeEventHandler(handler, options = {}) {
+    return EventSafety.wrapEventHandler(handler, options)
+  }  
+
+  // 安全地处理服务请求事件
+  createServiceRequestHandler(component) {
+    return this.createSafeEventHandler((event) => {
+      return this.handleServiceRequest(event, component)
+    }, {
+      onError: (error, event) => {
+        this.handleNavigationError(error, event, component)
+      }
+    })
+  }  
+
+  // 处理服务请求
+  async handleServiceRequest(event, component) {
+    console.log('处理导航相关服务请求:', event.type)
+    
+    // 安全检查事件目标
+    if (this.shouldProcessNavigationRequest(event)) {
+      await this.processNavigationRequest(event, component)
+    }
+  }
+  
+  // 检查是否应该处理导航请求
+  shouldProcessNavigationRequest(event) {
+    // 方法1：检查事件类型
+    if (event.type === 'service.requestComponentInfo') {
+      return true
+    }
+    
+    // 方法2：检查目标元素
+    if (event.matches('.navigation-component') || event.matches('.uni-page-head')) {
+      return true
+    }
+    
+    // 方法3：检查事件详情
+    if (event.detail && event.detail.componentType === 'navigation') {
+      return true
+    }
+    
+    return false
+  }
+  
+  // 处理导航请求
+  async processNavigationRequest(event, component) {
+    try {
+      // 获取导航栏信息
+      const navInfo = await this.getNavigationInfo(component)
+      
+      // 发送响应
+      this.emitNavigationResponse(navInfo, component)
+      
+    } catch (error) {
+      console.error('处理导航请求失败:', error)
+      throw error
+    }
+  }  
+  
+
+  // 获取完整的导航信息
+  async getNavigationInfo(component) {
+    const [navHeight, statusBarHeight, safeArea] = await Promise.all([
+      this.getNavigationHeight(component),
+      this.getStatusBarHeight(),
+      this.getSafeAreaInsets()
+    ])
+    
+    return {
+      navHeight,
+      statusBarHeight,
+      safeArea,
+      timestamp: Date.now()
+    }
+  }
+  
+  // 发送导航响应
+  emitNavigationResponse(navInfo, component) {
+    if (component && component.$emit) {
+      component.$emit('navigation.infoResponse', {
+        success: true,
+        data: navInfo,
+        timestamp: Date.now()
+      })
+    }
+  }  
+
+  // 错误处理
+  handleNavigationError(error, event, component) {
+    console.error('导航处理错误:', {
+      error: error.message,
+      eventType: event?.type,
+      component: component?.$options?.name
+    })
+    
+    // 发送错误响应
+    if (component && component.$emit) {
+      component.$emit('navigation.infoError', {
+        success: false,
+        error: error.message,
+        timestamp: Date.now()
+      })
+    }
+    
+    // 显示用户友好的错误信息
+    this.showError('导航服务暂时不可用')
+  }
+  
+  // 显示错误提示
+  showError(message) {
+    uni.showToast({
+      title: message,
+      icon: 'none',
+      duration: 2000
+    })
+  }  
+  
+  // 清理缓存
+  clearCache() {
+    this.navigationCache.clear()
+    console.log('导航缓存已清理')
+  }
+  
+}
+
+// 创建全局实例
+const navigationHelper = new NavigationHelper()
+
+export default navigationHelper
\ No newline at end of file