重构DefaultLayout.vue组件

src/composables/useScrollLock.ts

@@ -0,0 +1,159 @@
+import { ref, watch, onBeforeUnmount, readonly } from 'vue'
+
+// 滚动锁定配置选项
+export interface ScrollLockOptions {
+  // 是否在组件卸载时自动恢复滚动（默认true）
+  autoRestore?: boolean
+  // 是否保存和恢复滚动位置（默认true）
+  preserveScrollPosition?: boolean
+  // 自定义锁定时的样式
+  lockStyles?: {
+    overflow?: string
+    position?: string
+    width?: string
+  }
+}
+
+// 默认配置
+const DEFAULT_OPTIONS: Required<ScrollLockOptions> = {
+  autoRestore: true,
+  preserveScrollPosition: true,
+  lockStyles: {
+    overflow: 'hidden',
+    position: 'fixed',
+    width: '100%',
+  },
+}
+
+export function useScrollLock(options: ScrollLockOptions = {}) {
+  const config = { ...DEFAULT_OPTIONS, ...options }
+
+  // 状态管理
+  const isLocked = ref(false)
+  const savedScrollPosition = ref(0)
+  const originalBodyStyles = ref<{ [key: string]: string }>({})
+  const originalDocumentStyles = ref<{ [key: string]: string }>({})
+
+  // 保存当前滚动位置
+  const saveScrollPosition = () => {
+    if (config.preserveScrollPosition) {
+      savedScrollPosition.value =
+        window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop || 0
+    }
+  }
+
+  // 保存原始样式
+  const saveOriginalStyles = () => {
+    // 保存 body 样式
+    originalBodyStyles.value = {
+      overflow: document.body.style.overflow,
+      position: document.body.style.position,
+      top: document.body.style.top,
+      width: document.body.style.width,
+    }
+
+    // 保存 documentElement 样式
+    originalDocumentStyles.value = {
+      overflow: document.documentElement.style.overflow,
+    }
+  }
+
+  // 锁定滚动
+  const lockScroll = () => {
+    if (isLocked.value) return
+
+    // 保存当前状态
+    saveScrollPosition()
+    saveOriginalStyles()
+
+    // 应用锁定样式
+    document.body.style.overflow = config.lockStyles.overflow || 'hidden'
+    document.body.style.position = config.lockStyles.position || 'fixed'
+    document.body.style.width = config.lockStyles.width || '100%'
+    document.documentElement.style.overflow = config.lockStyles.overflow || 'hidden'
+
+    // 如果需要保持滚动位置，设置top偏移
+    if (config.preserveScrollPosition) {
+      document.body.style.top = `-${savedScrollPosition.value}px`
+    }
+
+    isLocked.value = true
+  }
+
+  // 恢复滚动
+  const restoreScroll = () => {
+    if (!isLocked.value) return
+
+    // 恢复原始样式
+    document.body.style.overflow = originalBodyStyles.value.overflow || ''
+    document.body.style.position = originalBodyStyles.value.position || ''
+    document.body.style.top = originalBodyStyles.value.top || ''
+    document.body.style.width = originalBodyStyles.value.width || ''
+    document.documentElement.style.overflow = originalDocumentStyles.value.overflow || ''
+
+    // 恢复滚动位置
+    if (config.preserveScrollPosition) {
+      window.scrollTo(0, savedScrollPosition.value)
+    }
+
+    isLocked.value = false
+  }
+
+  // 切换滚动锁定状态
+  const toggleScrollLock = (lock?: boolean) => {
+    const shouldLock = lock !== undefined ? lock : !isLocked.value
+
+    if (shouldLock) {
+      lockScroll()
+    } else {
+      restoreScroll()
+    }
+  }
+
+  // 监听响应式值的变化
+  const watchTarget = (target: any) => {
+    return watch(
+      target,
+      newValue => {
+        toggleScrollLock(!!newValue)
+      },
+      { immediate: false },
+    )
+  }
+
+  // 生命周期清理
+  onBeforeUnmount(() => {
+    if (config.autoRestore && isLocked.value) {
+      restoreScroll()
+    }
+  })
+
+  return {
+    // 状态
+    isLocked: readonly(isLocked),
+    savedScrollPosition: readonly(savedScrollPosition),
+
+    // 方法
+    lockScroll,
+    restoreScroll,
+    toggleScrollLock,
+    watchTarget,
+
+    // 工具方法
+    saveScrollPosition,
+  }
+}
+
+// 便捷的自动监听版本
+export function useScrollLockWithWatch(target: any, options: ScrollLockOptions = {}) {
+  const scrollLock = useScrollLock(options)
+
+  // 自动监听目标值的变化
+  const stopWatcher = scrollLock.watchTarget(target)
+
+  // 返回所有功能 + 停止监听的方法
+  return {
+    ...scrollLock,
+    stopWatcher,
+  }
+}