feat：完成通过自定义Collabora插件实现页面跳转

2025-11-25 14:38:54 +08:00
parent d40e5b261c
commit a475000df5
10 changed files with 205 additions and 147 deletions
@@ -0,0 +1,151 @@
+/**
+ * Collabora 自定义页面跳转模块
+ *
+ * 使用自定义 PostMessage 协议实现页面跳转,不依赖 UNO 命令
+ *
+ * @encoding UTF-8
+ */
+
+/**
+ * 页面跳转响应接口
+ */
+export interface GotoPageResponse {
+    pageNumber: number;
+    pageIndex: number;
+    totalPages: number;
+    currentOffset: number;
+    targetOffset: number;
+    scrollDelta: number;
+    timestamp: number;
+}
+
+/**
+ * Collabora PostMessage 数据类型
+ */
+interface CollaboraMessageData {
+    MessageId?: string;
+    msgId?: string;
+    Values?: {
+        Command?: string;
+        Status?: string;
+        pageNumber?: number;
+        pageIndex?: number;
+        totalPages?: number;
+        currentOffset?: number;
+        targetOffset?: number;
+        scrollDelta?: number;
+        timestamp?: number;
+        Error?: string;
+        [key: string]: unknown;
+    };
+    args?: {
+        Command?: string;
+        Status?: string;
+        pageNumber?: number;
+        pageIndex?: number;
+        totalPages?: number;
+        currentOffset?: number;
+        targetOffset?: number;
+        scrollDelta?: number;
+        timestamp?: number;
+        Error?: string;
+        [key: string]: unknown;
+    };
+    [key: string]: unknown;
+}
+
+/**
+ * 解析 PostMessage 数据
+ */
+function parseMessageData(data: unknown): CollaboraMessageData {
+    if (typeof data === 'string') {
+        return JSON.parse(data) as CollaboraMessageData;
+    }
+    return data as CollaboraMessageData;
+}
+
+/**
+ * 跳转到指定页面 (自定义实现,不使用 UNO 命令)
+ *
+ * 使用自定义 custompostMessage 插件实现页面跳转。
+ * 注意: Collabora 的页码是从 0 开始的,但此函数接受从 1 开始的页码。
+ *
+ * @param iframeWindow - iframe 的 contentWindow
+ * @param pageNumber - 页码 (从1开始)
+ * @returns Promise,解析为跳转响应信息
+ *
+ * @example
+ * ```typescript
+ * const response = await customGotoPage(iframeWindow, 5);
+ * console.log(`成功跳转到第 ${response.pageNumber} 页`);
+ * ```
+ */
+export async function customGotoPage(
+    iframeWindow: Window,
+    pageNumber: number
+): Promise<GotoPageResponse> {
+    return new Promise((resolve, reject) => {
+        const timeout = setTimeout(() => {
+            cleanup();
+            reject(new Error('页面跳转超时'));
+        }, 5000);
+
+        const handleMessage = (event: MessageEvent) => {
+            try {
+                if (event.source !== iframeWindow) {
+                    return;
+                }
+
+                const data = parseMessageData(event.data);
+
+                // bundle.js 的 _postMessage 会将消息转换为:
+                // { MessageId: 'custompostMessage_Resp', Values: { Command: 'GOTO_PAGE', ... } }
+                if (
+                    data.MessageId === 'custompostMessage_Resp' &&
+                    data.Values?.Command === 'GOTO_PAGE'
+                ) {
+                    clearTimeout(timeout);
+                    cleanup();
+
+                    if (data.Values.Status === 'success') {
+                        const response: GotoPageResponse = {
+                            pageNumber: data.Values.pageNumber || pageNumber,
+                            pageIndex: data.Values.pageIndex || pageNumber - 1,
+                            totalPages: data.Values.totalPages || 0,
+                            currentOffset: data.Values.currentOffset || 0,
+                            targetOffset: data.Values.targetOffset || 0,
+                            scrollDelta: data.Values.scrollDelta || 0,
+                            timestamp: data.Values.timestamp || Date.now(),
+                        };
+                        resolve(response);
+                    } else {
+                        reject(new Error(data.Values.Error || '页面跳转失败'));
+                    }
+                }
+            } catch (error) {
+                clearTimeout(timeout);
+                cleanup();
+                reject(error);
+            }
+        };
+
+        const cleanup = () => {
+            window.removeEventListener('message', handleMessage);
+        };
+
+        window.addEventListener('message', handleMessage);
+
+        // 发送跳转请求消息
+        const message = {
+            MessageId: 'custompostMessage',
+            Values: {
+                Command: 'GOTO_PAGE',
+                Args: {
+                    pageNumber: pageNumber,
+                },
+            },
+        };
+
+        iframeWindow.postMessage(JSON.stringify(message), '*');
+    });
+}