feat(xwebview): refine web navigation lifecycle

packages/xwebview/README.md

@@ -1,6 +1,6 @@
 # @xuqm/rn-xwebview
 
-通用 React Native WebView 容器。`1.0.0` 只有三项正式入口：
+通用 React Native WebView 容器。`1.1.0` 只有三项正式入口：
 
 - `<XWebViewHost />`：应用根部挂载一次的全屏页面 Host。
 - `openWebView(config)`：从任意业务服务打开页面，返回该页面自己的 Handle。
@@ -49,6 +49,8 @@ const page = openWebView({
 
 page.reload()
 page.postMessage('hello')
+page.suspend() // 临时展示宿主原生页面，WebView 实例和历史仍保留
+page.resume()
 page.close()
 const result = await page.closed
 ```
@@ -73,7 +75,27 @@ Host；Host 卸载会以 `host_unmounted` 关闭其全部页面。
 ## 页面栈与系统返回
 
 每次 `openWebView` 都生成独立页面和 Handle。页面栈只显示顶层页面，关闭后恢复下一层
-页面及其导航状态。Android 系统返回先执行网页历史返回，没有历史才关闭当前页。
+页面及其导航状态。默认导航栏的左返回按钮只在存在网页历史时显示，且只执行网页后退；
+右侧关闭按钮用于明确关闭当前页。
+
+Android 系统返回先执行网页历史返回，没有历史时默认关闭当前页。需要防止误退出的宿主
+可以启用双击关闭，并自行决定首次按键的提示样式：
+
+```tsx
+const page = openWebView({
+  behavior: {
+    hardwareBack: {
+      closeMode: 'doublePress',
+      doublePressIntervalMs: 1_000,
+      onFirstClosePress: () => showToast('再按一次退出当前页面'),
+    },
+  },
+  source: { uri: 'https://example.com' },
+})
+```
+
+宿主需要短暂展示原生页面时调用 `page.suspend()`，原生页面结束后调用
+`page.resume()`；暂停不等于关闭，不触发 `closed`，也不创建第二份 WebView。
 
 导航标题和显隐修改属于当前页面，不能污染下层页面。H5 隐藏原生导航栏但保留状态栏
 时，Bridge 可以从页面上下文取得真实安全区高度。

packages/xwebview/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@xuqm/rn-xwebview",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "description": "XuqmGroup RN SDK — XWebView module",
   "license": "UNLICENSED",
   "main": "src/index.ts",

packages/xwebview/src/XWebViewHost.tsx

@@ -1,11 +1,17 @@
-import React, { useCallback, useEffect, useMemo, useState, useSyncExternalStore } from 'react'
+import React, {
+  useCallback,
+  useEffect,
+  useMemo,
+  useRef,
+  useState,
+  useSyncExternalStore,
+} from 'react'
 import { ImageBackground, Modal, Pressable, StatusBar, StyleSheet, Text, View } from 'react-native'
 import Clipboard from '@react-native-clipboard/clipboard'
 import Svg, { Defs, LinearGradient, Rect, Stop } from 'react-native-svg'
 import { SafeAreaProvider, useSafeAreaInsets } from 'react-native-safe-area-context'
 
 import {
-  closeActivePage,
   getXWebViewSnapshot,
   mountXWebViewHost,
   subscribeXWebViewRuntime,
@@ -149,7 +155,7 @@ function NavigationBar({ page, topInset }: { page: XWebViewPage; topInset: numbe
   const navigationBar = config.navigationBar ?? {}
   const backButton = {
     color: navigationBar.backButton?.color ?? presentation.titleColor,
-    visible: navigationBar.backButton?.visible ?? true,
+    visible: navigationBar.backButton?.visible ?? navigationState.canGoBack,
   }
   const closeButton = {
     color: navigationBar.closeButton?.color ?? presentation.titleColor,
@@ -203,10 +209,7 @@ function NavigationBar({ page, topInset }: { page: XWebViewPage; topInset: numbe
           {backButton.visible ? (
             <Pressable
               hitSlop={HIT_SLOP}
-              onPress={() => {
+              onPress={() => handle.goBack()}
-                if (navigationState.canGoBack) handle.goBack()
-                else handle.close('back')
-              }}
               style={styles.navigationButton}
             >
               <IconBack color={backButton.color} size={24} />
@@ -299,14 +302,39 @@ export function XWebViewHost() {
   )
 
   useEffect(() => mountXWebViewHost(), [])
+  const pendingHardwareClose = useRef<{ at: number; pageId: string } | null>(null)
 
   const handleRequestClose = useCallback(() => {
-    const page = snapshot.pages.at(-1)
+    const page = [...snapshot.pages].reverse().find(item => !item.suspended)
     if (!page) return
-    if (page.navigationState.canGoBack) page.handle.goBack()
+    if (page.navigationState.canGoBack) {
-    else closeActivePage('back')
+      pendingHardwareClose.current = null
+      page.handle.goBack()
+      return
+    }
+
+    const hardwareBack = page.config.behavior?.hardwareBack
+    if (hardwareBack?.closeMode !== 'doublePress') {
+      pendingHardwareClose.current = null
+      page.handle.close('back')
+      return
+    }
+
+    const now = Date.now()
+    const interval = Math.max(250, hardwareBack.doublePressIntervalMs ?? 1_000)
+    const pending = pendingHardwareClose.current
+    if (pending?.pageId === page.id && now - pending.at <= interval) {
+      pendingHardwareClose.current = null
+      page.handle.close('back')
+      return
+    }
+    pendingHardwareClose.current = { at: now, pageId: page.id }
+    hardwareBack.onFirstClosePress?.()
   }, [snapshot.pages])
 
+  const visiblePages = snapshot.pages.filter(page => !page.suspended)
+  const activePageId = visiblePages.at(-1)?.id
+
   return (
     <Modal
       animationType="slide"
@@ -314,12 +342,12 @@ export function XWebViewHost() {
       onRequestClose={handleRequestClose}
       presentationStyle="fullScreen"
       statusBarTranslucent
-      visible={snapshot.pages.length > 0}
+      visible={visiblePages.length > 0}
     >
       <SafeAreaProvider>
         <View style={styles.host}>
           {snapshot.pages.map((page, index) => (
-            <HostPage key={page.id} active={index === snapshot.pages.length - 1} page={page} />
+            <HostPage key={page.id} active={page.id === activePageId} page={page} />
           ))}
         </View>
       </SafeAreaProvider>

packages/xwebview/src/runtime.ts

@@ -24,6 +24,7 @@ export type XWebViewPage = {
   id: string
   navigationState: XWebViewNavigationState
   presentation: XWebViewPresentation
+  suspended: boolean
 }
 
 type InternalPage = XWebViewPage & {
@@ -110,6 +111,8 @@ export function openWebView(config: XWebViewConfig): XWebViewPageHandle {
     goForward: () => controllerCall(id, controller => controller.goForward()),
     postMessage: message => controllerCall(id, controller => controller.postMessage(message)),
     reload: () => controllerCall(id, controller => controller.reload()),
+    resume: () => setPageSuspended(id, false),
+    suspend: () => setPageSuspended(id, true),
   }
 
   const page: InternalPage = {
@@ -124,6 +127,7 @@ export function openWebView(config: XWebViewConfig): XWebViewPageHandle {
     },
     presentation: defaultPresentation(config),
     resolveClosed,
+    suspended: false,
     timeout: null,
   }
 
@@ -218,6 +222,13 @@ export function updatePageWindow(pageId: string, patch: XWebViewWindowPatch): vo
   emit()
 }
 
+export function setPageSuspended(pageId: string, suspended: boolean): void {
+  const page = pageById(pageId)
+  if (!page || page.suspended === suspended) return
+  page.suspended = suspended
+  emit()
+}
+
 export function isActivePage(pageId: string): boolean {
   return activePage()?.id === pageId
 }

packages/xwebview/src/types.ts

@@ -41,6 +41,12 @@ export type XWebViewPageHandle = XWebViewController & {
   readonly closed: Promise<XWebViewPageClosedResult>
   readonly id: string
   close(reason?: XWebViewPageCloseReason | string, data?: unknown): void
+  /**
+   * 临时隐藏全屏 WebView，但保留页面实例和网页历史。
+   * 适用于宿主短暂展示原生页面，完成后通过 resume 恢复。
+   */
+  suspend(): void
+  resume(): void
 }
 
 export type XWebViewNavigationBackground = {
@@ -203,6 +209,12 @@ export type XWebViewBehaviorConfig = {
   injectedJavaScript?: string
   injectedJavaScriptBeforeContentLoaded?: string
   mixedContent?: 'never' | 'compatibility' | 'always'
+  hardwareBack?: {
+    /** 默认立即关闭；doublePress 表示在指定时间内再次按返回键才关闭。 */
+    closeMode?: 'immediate' | 'doublePress'
+    doublePressIntervalMs?: number
+    onFirstClosePress?: () => void
+  }
   onBridgeError?: (error: string) => void
   onClose?: (result: XWebViewPageClosedResult) => void
   onControllerReady?: (controller: XWebViewController | null) => void

packages/xwebview/tests/runtime.test.ts

@@ -54,3 +54,22 @@ test('dynamic navigation state belongs only to its page', () => {
   second.close()
   unmount()
 })
+
+test('suspend and resume preserve the same page and handle', () => {
+  resetXWebViewRuntimeForTests()
+  const unmount = mountXWebViewHost()
+  const page = openWebView({
+    source: { uri: 'https://suspend.test' },
+  })
+
+  page.suspend()
+  assert.equal(getXWebViewSnapshot().pages[0].suspended, true)
+  assert.equal(getXWebViewSnapshot().pages[0].handle, page)
+
+  page.resume()
+  assert.equal(getXWebViewSnapshot().pages[0].suspended, false)
+  assert.equal(getXWebViewSnapshot().pages[0].handle, page)
+
+  page.close()
+  unmount()
+})