generated from dellevin/template
1384 lines
50 KiB
Dart
1384 lines
50 KiB
Dart
import 'dart:convert';
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import 'dart:io';
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import 'dart:ui' as ui;
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import 'package:flutter/material.dart';
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import 'package:flutter/rendering.dart';
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import 'package:flutter_inappwebview/flutter_inappwebview.dart';
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import '../../services/epub/epub_theme.dart';
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import 'book_session.dart';
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import '../../services/epub/epub_webview_handler.dart';
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import '../../services/epub/reader_scripts.dart';
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import '../../services/epub/web/webview_bridge.dart';
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import '../../services/epub/web/reader_api.dart';
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/// Controller for ReaderWebView that provides methods to control the WebView
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class ReaderWebViewController {
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_ReaderWebViewState? _webViewState;
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bool get isAttached => _webViewState != null;
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void _attachState(_ReaderWebViewState? state) {
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_webViewState = state;
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}
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// JavaScript wrapper methods
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Future<int?> jumpToLastPageOfFrame(String frame) async {
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return await _webViewState?._jumpToLastPageOfFrame(frame);
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}
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Future<int?> cycleFrames(String direction) async {
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return await _webViewState?._cycleFrames(direction);
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}
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Future<int?> jumpToPageFor(String frame, int pageIndex) async {
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return await _webViewState?._jumpToPageFor(frame, pageIndex);
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}
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Future<int?> loadFrame(
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String frame,
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String url,
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String anchors,
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String properties,
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) async {
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return await _webViewState?._loadFrame(frame, url, anchors, properties);
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}
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Future<void> jumpToPage(int pageIndex) async {
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await _webViewState?._jumpToPage(pageIndex);
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}
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Future<void> restoreScrollPosition(double ratio) async {
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await _webViewState?._restoreScrollPosition(ratio);
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}
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Future<void> checkLongPressElementAt(double x, double y) async {
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await _webViewState?._checkLongPressElementAt(x, y);
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}
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Future<void> checkTapElementAt(double x, double y) async {
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await _webViewState?._checkTapElementAt(x, y);
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}
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/// 获取当前 iframe 中用户选中的文字（长按后调用）
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Future<String?> getTextSelection() async {
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return await _webViewState?._getTextSelection();
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}
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Future<ui.Image?> takeScreenshot() async {
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return await _webViewState?._takeScreenshot();
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}
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Future<void> waitForRender() async {
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await _webViewState?._waitForRender();
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}
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Future<void> updateTheme(EpubTheme theme) async {
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await _webViewState?._updateTheme(theme);
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}
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Future<void> waitForEvent(int token, [int timeoutMs = 10000]) async {
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await _webViewState?._bridge.waitForEvent(token, timeoutMs);
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}
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Future<void> waitForEvents(List<int> tokens, [int timeoutMs = 10000]) async {
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await _webViewState?._bridge.waitForEvents(tokens, timeoutMs);
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}
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Future<dynamic> runJavaScriptReturningResult(String js) async {
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return await _webViewState?._controller?.evaluateJavascript(source: js);
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}
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/// 获取当前 iframe 中选区的详细信息（用于高亮持久化）
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Future<Map<String, dynamic>?> getSelectionInfo() async {
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final result = await _webViewState?._controller?.evaluateJavascript(
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source: 'window.__mooknoteHL && window.__mooknoteHL.getSelectionInfo()',
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);
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if (result == null) return null;
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if (result is Map) return Map<String, dynamic>.from(result);
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return null;
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}
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/// 应用单个高亮到当前 iframe
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Future<bool> applyHighlight(Map<String, dynamic> info, String id, {String color = 'highlight', String text = ''}) async {
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final infoJson = jsonEncode(info);
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final textArg = text.replaceAll('\\', '\\\\').replaceAll("'", "\\'").replaceAll('\n', '\\n');
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final result = await _webViewState?._controller?.evaluateJavascript(
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source:
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"window.__mooknoteHL && window.__mooknoteHL.applyHighlight($infoJson, \"$id\", \"$color\", '$textArg')",
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);
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return result == true;
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}
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/// 批量应用高亮（用于 spine 加载后恢复）
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Future<int> applyHighlights(List<Map<String, dynamic>> highlights) async {
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if (highlights.isEmpty) return 0;
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final list = jsonEncode(highlights.map((h) {
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// 优先使用嵌套的 info 对象（来自 restoreHighlightsForCurrentSpine）
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final rawInfo = h['info'];
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Map<String, dynamic> info;
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if (rawInfo is Map) {
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info = Map<String, dynamic>.from(rawInfo);
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} else {
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// 兼容扁平字段
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info = {
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'startXPath': h['start_x_path'] ?? h['startXPath'] ?? '',
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'startOffset': h['start_offset'] ?? h['startOffset'] ?? 0,
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'endXPath': h['end_x_path'] ?? h['endXPath'] ?? '',
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'endOffset': h['end_offset'] ?? h['endOffset'] ?? 0,
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};
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}
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return {
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'info': info,
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'id': (h['id'] ?? '').toString(),
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'color': h['color'] == 'excerpt' ? 'excerpt' : 'highlight',
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'text': h['text'] ?? h['content'] ?? '',
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};
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}).toList());
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final result = await _webViewState?._controller?.evaluateJavascript(
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source: 'window.__mooknoteHL && window.__mooknoteHL.applyHighlights($list)',
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);
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if (result is int) return result;
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if (result is num) return result.toInt();
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return 0;
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}
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/// 移除指定 id 的高亮
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Future<void> removeHighlight(String id) async {
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await _webViewState?._controller?.evaluateJavascript(
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source: 'window.__mooknoteHL && window.__mooknoteHL.removeHighlight("$id")',
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);
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}
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/// 移除当前文档中所有高亮标记
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Future<void> clearAllHighlights() async {
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await _webViewState?._controller?.evaluateJavascript(
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source: 'window.__mooknoteHL && window.__mooknoteHL.clearAllHighlights()',
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);
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}
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/// 清除当前选区
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Future<void> clearSelection() async {
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await _webViewState?._controller?.evaluateJavascript(
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source: 'window.__mooknoteHL && window.__mooknoteHL.clearSelection()',
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);
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}
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/// 编程式选中长按位置的文字（用于 Flutter 长按手势触发文本选择）
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Future<void> selectWordAt(double x, double y) async {
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await _webViewState?._controller?.evaluateJavascript(
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source: 'window.__mooknoteHL && window.__mooknoteHL.selectWordAt($x, $y)',
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);
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}
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/// 拖动手柄时扩展选区
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Future<void> extendSelection(double x, double y, bool isStart) async {
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await _webViewState?._controller?.evaluateJavascript(
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source: 'window.__mooknoteHL && window.__mooknoteHL.extendSelection($x, $y, ${isStart ? 'true' : 'false'})',
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);
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}
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/// 根据 XPath 获取元素所在的页码（用于跳转到高亮位置）
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Future<int> getPageIndexForXPath(String xpath) async {
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final result = await _webViewState?._controller?.evaluateJavascript(
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source: 'window.__mooknoteHL && window.__mooknoteHL.getPageIndexForXPath("$xpath")',
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);
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if (result is int) return result;
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if (result is num) return result.toInt();
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return -1;
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}
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/// 根据文本内容获取所在页码（XPath 失败时的回退方案）
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Future<int> getPageIndexForText(String text) async {
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if (text.isEmpty) return -1;
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final escaped = text.replaceAll('\\', '\\\\').replaceAll("'", "\\'").replaceAll('\n', '\\n');
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final result = await _webViewState?._controller?.evaluateJavascript(
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source: "window.__mooknoteHL && window.__mooknoteHL.getPageIndexForText('$escaped')",
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);
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if (result is int) return result;
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if (result is num) return result.toInt();
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return -1;
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}
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}
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final InAppWebViewSettings defaultSettings = InAppWebViewSettings(
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disableContextMenu: false,
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disableLongPressContextMenuOnLinks: true,
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selectionGranularity: SelectionGranularity.CHARACTER,
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transparentBackground: true,
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allowFileAccessFromFileURLs: true,
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allowUniversalAccessFromFileURLs: true,
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useShouldInterceptRequest: true,
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useOnLoadResource: false,
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useShouldOverrideUrlLoading: true,
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javaScriptEnabled: true,
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disableHorizontalScroll: true,
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disableVerticalScroll: true,
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supportZoom: false,
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useHybridComposition: true,
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resourceCustomSchemes: [EpubWebViewHandler.virtualScheme],
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verticalScrollBarEnabled: false,
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horizontalScrollBarEnabled: false,
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overScrollMode: OverScrollMode.NEVER,
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);
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/// Callbacks for WebView events
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class ReaderWebViewCallbacks {
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final Function() onInitialized;
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final Function(int totalPages) onPageCountReady;
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final Function(int pageIndex) onPageChanged;
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final Function(List<String> anchors) onScrollAnchors;
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final Function(String imageUrl, Rect rect) onImageLongPress;
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final Function(double x, double y) onTap;
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final Function(String innerHtml, Rect rect, String baseUrl) onFootnoteTap;
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final Function(String url) onLinkTap;
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final bool Function(String url) shouldHandleLinkTap;
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final Function(String selectedText, Rect rect, int spineIndex, double scrollRatio, Offset? startHandle, Offset? endHandle, Map<String, dynamic>? selectionInfo)? onTextSelection;
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const ReaderWebViewCallbacks({
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required this.onInitialized,
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required this.onPageCountReady,
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required this.onPageChanged,
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required this.onScrollAnchors,
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required this.onImageLongPress,
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required this.onTap,
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required this.onFootnoteTap,
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required this.onLinkTap,
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required this.shouldHandleLinkTap,
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this.onTextSelection,
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});
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}
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/// WebView widget for reading EPUB content
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class ReaderWebView extends StatefulWidget {
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final BookSession bookSession;
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final EpubWebViewHandler webViewHandler;
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final String fileHash;
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final ReaderWebViewCallbacks callbacks;
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final EpubTheme initializeTheme;
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final bool isLoading;
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final ReaderWebViewController controller;
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final VoidCallback? onWebViewCreated;
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final bool shouldShowWebView;
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final String? coverRelativePath;
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final int direction;
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const ReaderWebView({
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super.key,
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required this.bookSession,
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required this.webViewHandler,
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required this.fileHash,
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required this.callbacks,
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required this.initializeTheme,
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required this.isLoading,
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required this.controller,
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this.onWebViewCreated,
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required this.shouldShowWebView,
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this.coverRelativePath,
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required this.direction,
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});
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@override
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State<ReaderWebView> createState() => _ReaderWebViewState();
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}
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class _ReaderWebViewState extends State<ReaderWebView> {
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final GlobalKey _repaintKey = GlobalKey();
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InAppWebViewController? _controller;
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HeadlessInAppWebView? _headlessWebView;
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bool _isHeadlessInitialized = false;
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bool _isSubsequentLoad = false;
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late EpubTheme _currentTheme;
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final WebViewBridge _bridge = WebViewBridge();
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late final ReaderApi _api = ReaderApi(_bridge);
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@override
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void initState() {
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super.initState();
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_currentTheme = widget.initializeTheme;
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widget.controller._attachState(this);
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}
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@override
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void dispose() {
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widget.controller._attachState(null);
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_bridge.detach();
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_headlessWebView?.dispose();
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_headlessWebView = null;
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_controller = null;
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super.dispose();
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}
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@override
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void didUpdateWidget(covariant ReaderWebView oldWidget) {
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super.didUpdateWidget(oldWidget);
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if (!oldWidget.isLoading && widget.isLoading) {
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setState(() {
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_isSubsequentLoad = true;
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});
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}
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}
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void _initHeadlessWebViewIfNeeded(double width, double height) {
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if (_isHeadlessInitialized) return;
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_headlessWebView = HeadlessInAppWebView(
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initialData: _generateInitialData(width, height),
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initialSettings: defaultSettings,
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shouldInterceptRequest: _shouldInterceptRequest,
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onLoadResourceWithCustomScheme: _onLoadResourceWithCustomScheme,
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shouldOverrideUrlLoading: _shouldOverrideUrlLoading,
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onWebViewCreated: _onWebViewCreated,
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onLoadStop: _onLoadStop,
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);
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_headlessWebView?.run();
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_isHeadlessInitialized = true;
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}
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Future<void> _waitForWebviewRender() async {
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if (_controller == null) return;
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await _api.waitForRender();
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}
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Future<void> _waitForRender() async {
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await _waitForWebviewRender();
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}
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Future<int> _jumpToLastPageOfFrame(String frame) =>
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_api.jumpToLastPageOfFrame(frame);
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Future<int> _cycleFrames(String direction) => _api.cycleFrames(direction);
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Future<int> _jumpToPageFor(String frame, int pageIndex) =>
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_api.jumpToPageFor(frame, pageIndex);
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Future<int> _loadFrame(
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String frame,
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||
String url,
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||
String anchors,
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String properties,
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) => _api.loadFrame(frame, url, anchors, properties);
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Future<void> _jumpToPage(int pageIndex) => _api.jumpToPage(pageIndex);
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Future<void> _restoreScrollPosition(double ratio) =>
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_api.restoreScrollPosition(ratio);
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||
Future<void> _checkLongPressElementAt(double x, double y) =>
|
||
_api.checkLongPressElementAt(x, y);
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||
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||
Future<void> _checkTapElementAt(double x, double y) =>
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_api.checkTapElementAt(x, y);
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||
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||
/// 获取当前 iframe 中用户选中的文字
|
||
Future<String?> _getTextSelection() async {
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||
if (_controller == null) return null;
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||
final result = await _controller!.evaluateJavascript(source: '''
|
||
(function(){
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||
var f = document.getElementById('frame-curr');
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if (!f || !f.contentWindow) return '';
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var sel = f.contentWindow.getSelection();
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return sel ? sel.toString() : '';
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})()
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''');
|
||
if (result == null) return null;
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||
return result.toString();
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||
}
|
||
|
||
InAppWebViewInitialData _generateInitialData(double width, double height) {
|
||
return InAppWebViewInitialData(
|
||
data: generateSkeletonHtml(
|
||
width,
|
||
height,
|
||
_currentTheme,
|
||
widget.direction,
|
||
),
|
||
baseUrl: WebUri(EpubWebViewHandler.getBaseUrl()),
|
||
);
|
||
}
|
||
|
||
Future<WebResourceResponse?> _shouldInterceptRequest(
|
||
InAppWebViewController controller,
|
||
WebResourceRequest request,
|
||
) async {
|
||
return await widget.webViewHandler.handleRequest(
|
||
epubPath: widget.bookSession.book['file_path'] as String,
|
||
fileHash: widget.fileHash,
|
||
requestUrl: request.url,
|
||
);
|
||
}
|
||
|
||
Future<CustomSchemeResponse?> _onLoadResourceWithCustomScheme(
|
||
InAppWebViewController controller,
|
||
WebResourceRequest request,
|
||
) async {
|
||
return await widget.webViewHandler.handleRequestWithCustomScheme(
|
||
epubPath: widget.bookSession.book['file_path'] as String,
|
||
fileHash: widget.fileHash,
|
||
requestUrl: request.url,
|
||
);
|
||
}
|
||
|
||
Future<NavigationActionPolicy?> _shouldOverrideUrlLoading(
|
||
InAppWebViewController controller,
|
||
NavigationAction navigationAction,
|
||
) async {
|
||
final uri = navigationAction.request.url!;
|
||
if (uri.scheme == 'data') {
|
||
return NavigationActionPolicy.ALLOW;
|
||
}
|
||
if (EpubWebViewHandler.isEpubRequest(uri)) {
|
||
return NavigationActionPolicy.ALLOW;
|
||
}
|
||
return NavigationActionPolicy.CANCEL;
|
||
}
|
||
|
||
void _onWebViewCreated(InAppWebViewController controller) {
|
||
_controller = controller;
|
||
_bridge.attach(controller);
|
||
_setupJavaScriptHandlers(controller);
|
||
widget.onWebViewCreated?.call();
|
||
}
|
||
|
||
void _onLoadStop(InAppWebViewController controller, WebUri? url) {
|
||
// 注入高亮辅助函数库 + CSS + 文本选中检测（一次性注入，定时重新应用到新 contentDocument）
|
||
controller.evaluateJavascript(source: r'''
|
||
(function(){
|
||
if (window.__mooknoteHL) {
|
||
console.log('[MN] already injected, re-running setup');
|
||
setupSelectionListener();
|
||
return;
|
||
}
|
||
console.log('[MN] injecting highlight + selection JS');
|
||
|
||
function getFrameDoc() {
|
||
var f = document.getElementById('frame-curr');
|
||
return f && f.contentDocument ? f.contentDocument : null;
|
||
}
|
||
|
||
function getFrameWin() {
|
||
var f = document.getElementById('frame-curr');
|
||
return f && f.contentWindow ? f.contentWindow : null;
|
||
}
|
||
|
||
function getXPath(node, root) {
|
||
if (node.nodeType === 3) {
|
||
var parent = node.parentNode;
|
||
var textIndex = 0;
|
||
for (var i = 0; i < parent.childNodes.length; i++) {
|
||
if (parent.childNodes[i] === node) break;
|
||
if (parent.childNodes[i].nodeType === 3) textIndex++;
|
||
}
|
||
return getXPath(parent, root) + '/text()[' + (textIndex + 1) + ']';
|
||
}
|
||
if (node.nodeType !== 1) return '';
|
||
if (node === root) return '';
|
||
var parts = [];
|
||
var current = node;
|
||
while (current && current.nodeType === 1 && current !== root) {
|
||
var parent = current.parentNode;
|
||
if (!parent) break;
|
||
var index = 1;
|
||
var siblings = parent.childNodes;
|
||
for (var i = 0; i < siblings.length; i++) {
|
||
var s = siblings[i];
|
||
if (s.nodeType === 1 && s.tagName === current.tagName) {
|
||
if (s === current) break;
|
||
index++;
|
||
}
|
||
}
|
||
parts.unshift(current.tagName.toLowerCase() + '[' + index + ']');
|
||
current = parent;
|
||
}
|
||
return '/' + parts.join('/');
|
||
}
|
||
|
||
function getNodeByXPath(doc, xpath) {
|
||
if (!doc.evaluate) return null;
|
||
try {
|
||
var result = doc.evaluate(xpath, doc, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null);
|
||
return result.singleNodeValue;
|
||
} catch (e) {
|
||
return null;
|
||
}
|
||
}
|
||
|
||
/// 计算节点在分栏排版中的页码
|
||
/// 与 Lumina 的 calculatePageIndexOfAnchor 使用相同算法：
|
||
/// getBoundingClientRect + scrollOffset，配合 128px column-gap
|
||
function calcPageIndex(doc, node) {
|
||
if (!node) return -1;
|
||
var el = node.nodeType === 3 ? node.parentNode : node;
|
||
var f = document.getElementById('frame-curr');
|
||
if (!f) return -1;
|
||
var iframeWidth = f.clientWidth;
|
||
var iframeHeight = f.clientHeight;
|
||
if (iframeWidth <= 0 || iframeHeight <= 0) return -1;
|
||
var bodyRect = doc.body.getBoundingClientRect();
|
||
var clientRects = el.getClientRects();
|
||
var rect = clientRects.length > 0 ? clientRects[0] : el.getBoundingClientRect();
|
||
if (!rect || rect.width === 0 && rect.height === 0) return -1;
|
||
// 判断是水平还是垂直分栏（与 Lumina 一致：direction===1 为垂直）
|
||
var isVertical = doc.body.classList.contains('lumina-is-vertical');
|
||
var page;
|
||
if (isVertical) {
|
||
var offsetY = rect.top + doc.body.scrollTop - bodyRect.top + rect.height / 5 + 1;
|
||
page = Math.floor((offsetY + 128) / (iframeHeight + 128));
|
||
console.log('[MN] calcPage V: rect.top=' + rect.top + ' scrollTop=' + doc.body.scrollTop + ' bodyRect.top=' + bodyRect.top + ' offsetY=' + offsetY + ' iframeH=' + iframeHeight + ' page=' + page);
|
||
} else {
|
||
var offsetX = rect.left + doc.body.scrollLeft - bodyRect.left + rect.width / 5 + 1;
|
||
page = Math.floor((offsetX + 128) / (iframeWidth + 128));
|
||
console.log('[MN] calcPage H: rect.left=' + rect.left + ' scrollLeft=' + doc.body.scrollLeft + ' bodyRect.left=' + bodyRect.left + ' offsetX=' + offsetX + ' iframeW=' + iframeWidth + ' page=' + page);
|
||
}
|
||
return page;
|
||
}
|
||
|
||
/// 文本搜索回退：遍历所有文本节点，拼接后搜索目标文本，定位并高亮
|
||
function applyHighlightByTextSearch(doc, text, id, color) {
|
||
if (!text || text.length === 0) return false;
|
||
try {
|
||
var walker = doc.createTreeWalker(doc.body, NodeFilter.SHOW_TEXT, {
|
||
acceptNode: function(node) {
|
||
if (node.textContent.trim().length > 0) return NodeFilter.FILTER_ACCEPT;
|
||
return NodeFilter.FILTER_SKIP;
|
||
}
|
||
}, null);
|
||
var nodes = [];
|
||
var n;
|
||
while (n = walker.nextNode()) nodes.push(n);
|
||
if (nodes.length === 0) return false;
|
||
|
||
var fullText = '';
|
||
var ranges = [];
|
||
for (var i = 0; i < nodes.length; i++) {
|
||
var c = nodes[i].textContent;
|
||
ranges.push({ node: nodes[i], start: fullText.length, len: c.length });
|
||
fullText += c;
|
||
}
|
||
|
||
var idx = fullText.indexOf(text);
|
||
if (idx === -1) return false;
|
||
var endIdx = idx + text.length;
|
||
|
||
var startInfo = null, endInfo = null;
|
||
for (var i = 0; i < ranges.length; i++) {
|
||
var r = ranges[i];
|
||
if (!startInfo && idx >= r.start && idx < r.start + r.len) {
|
||
startInfo = { node: r.node, offset: idx - r.start };
|
||
}
|
||
if (endIdx > r.start && endIdx <= r.start + r.len) {
|
||
endInfo = { node: r.node, offset: endIdx - r.start };
|
||
break;
|
||
}
|
||
}
|
||
if (!startInfo || !endInfo) return false;
|
||
|
||
var range = doc.createRange();
|
||
range.setStart(startInfo.node, startInfo.offset);
|
||
range.setEnd(endInfo.node, endInfo.offset);
|
||
|
||
return wrapRangeMultiNode(doc, range, id, color);
|
||
} catch (e) {
|
||
console.log('[MN] applyHighlightByTextSearch error: ' + e);
|
||
return false;
|
||
}
|
||
}
|
||
|
||
/// 多节点包裹：遍历 range 内所有文本节点，逐个包裹在 <mooknote-mark> 中
|
||
/// 保留段落结构，不用 extractContents
|
||
function wrapRangeMultiNode(doc, range, id, color) {
|
||
var bg = color === 'excerpt' ? 'rgba(33, 150, 243, 0.35)' : 'rgba(255, 235, 59, 0.5)';
|
||
var markType = color === 'excerpt' ? 'excerpt' : 'highlight';
|
||
|
||
var ancestor = range.commonAncestorContainer;
|
||
var walkerRoot = ancestor.nodeType === 3 ? ancestor.parentNode : ancestor;
|
||
var walker = doc.createTreeWalker(walkerRoot, NodeFilter.SHOW_TEXT, null);
|
||
|
||
var nodesToWrap = [];
|
||
var n;
|
||
while (n = walker.nextNode()) {
|
||
if (range.intersectsNode(n)) {
|
||
var s = 0, e = n.length;
|
||
if (n === range.startContainer) s = range.startOffset;
|
||
if (n === range.endContainer) e = range.endOffset;
|
||
if (n === range.startContainer && n === range.endContainer) { s = range.startOffset; e = range.endOffset; }
|
||
if (s < e) nodesToWrap.push({ node: n, start: s, end: e });
|
||
}
|
||
}
|
||
|
||
if (nodesToWrap.length === 0) {
|
||
var mark = doc.createElement('mooknote-mark');
|
||
mark.setAttribute('data-hl-id', id);
|
||
mark.setAttribute('data-hl-type', markType);
|
||
mark.style.setProperty('background-color', bg, 'important');
|
||
mark.style.setProperty('color', 'inherit', 'important');
|
||
mark.style.setProperty('border-radius', '2px', 'important');
|
||
try {
|
||
range.surroundContents(mark);
|
||
return true;
|
||
} catch (e) {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
// 倒序包裹（防止 splitText 影响后面的节点索引）
|
||
for (var i = nodesToWrap.length - 1; i >= 0; i--) {
|
||
var item = nodesToWrap[i];
|
||
var tn = item.node;
|
||
var start = item.start;
|
||
var end = item.end;
|
||
|
||
var wrapNode = tn;
|
||
if (start > 0) wrapNode = tn.splitText(start);
|
||
if (end - start < wrapNode.length) wrapNode.splitText(end - start);
|
||
|
||
var mk = doc.createElement('mooknote-mark');
|
||
mk.setAttribute('data-hl-id', id);
|
||
mk.setAttribute('data-hl-type', markType);
|
||
mk.style.setProperty('background-color', bg, 'important');
|
||
mk.style.setProperty('color', 'inherit', 'important');
|
||
mk.style.setProperty('border-radius', '2px', 'important');
|
||
|
||
wrapNode.parentNode.insertBefore(mk, wrapNode);
|
||
mk.appendChild(wrapNode);
|
||
}
|
||
return true;
|
||
}
|
||
|
||
window.__mooknoteHL = {
|
||
getSelectionInfo: function() {
|
||
var win = getFrameWin();
|
||
if (!win) return null;
|
||
var sel = win.getSelection();
|
||
if (!sel || sel.isCollapsed || sel.rangeCount === 0) return null;
|
||
var range = sel.getRangeAt(0);
|
||
var doc = getFrameDoc();
|
||
if (!doc) return null;
|
||
return {
|
||
text: sel.toString(),
|
||
startXPath: getXPath(range.startContainer, doc),
|
||
startOffset: range.startOffset,
|
||
endXPath: getXPath(range.endContainer, doc),
|
||
endOffset: range.endOffset
|
||
};
|
||
},
|
||
|
||
applyHighlight: function(info, id, color, text) {
|
||
var doc = getFrameDoc();
|
||
if (!doc || !info) {
|
||
return false;
|
||
}
|
||
|
||
var startNode = getNodeByXPath(doc, info.startXPath);
|
||
var endNode = getNodeByXPath(doc, info.endXPath);
|
||
|
||
if (!startNode || !endNode) {
|
||
if (text && text.length > 0) {
|
||
return applyHighlightByTextSearch(doc, text, id, color);
|
||
}
|
||
return false;
|
||
}
|
||
|
||
try {
|
||
var so = Math.min(info.startOffset, startNode.length || 0);
|
||
var eo = Math.min(info.endOffset, endNode.length || 0);
|
||
|
||
var range = doc.createRange();
|
||
range.setStart(startNode, so);
|
||
range.setEnd(endNode, eo);
|
||
|
||
return wrapRangeMultiNode(doc, range, id, color);
|
||
} catch (e) {
|
||
if (text) return applyHighlightByTextSearch(doc, text, id, color);
|
||
return false;
|
||
}
|
||
},
|
||
|
||
applyHighlights: function(list) {
|
||
if (!list || list.length === 0) return 0;
|
||
// 按文档位置倒序排序（从末尾往前应用），避免前面的高亮分裂文本节点影响后面的 XPath
|
||
// 用数字排序而非字符串排序（/p[10] 应排在 /p[2] 之后）
|
||
function docOrder(item) {
|
||
var xp = (item && item.info && item.info.startXPath) || '';
|
||
// 提取所有 [N] 中的数字，组成数组用于比较
|
||
var nums = [];
|
||
var re = /\[(\d+)\]/g;
|
||
var m;
|
||
while ((m = re.exec(xp)) !== null) nums.push(parseInt(m[1], 10));
|
||
return nums;
|
||
}
|
||
function compareNums(a, b) {
|
||
for (var i = 0; i < Math.max(a.length, b.length); i++) {
|
||
var av = a[i] || 0;
|
||
var bv = b[i] || 0;
|
||
if (av !== bv) return av - bv;
|
||
}
|
||
return 0;
|
||
}
|
||
var sorted = list.slice().sort(function(a, b) {
|
||
return compareNums(docOrder(b), docOrder(a)); // 倒序
|
||
});
|
||
var applied = 0;
|
||
for (var i = 0; i < sorted.length; i++) {
|
||
if (this.applyHighlight(sorted[i].info, sorted[i].id, sorted[i].color, sorted[i].text)) applied++;
|
||
}
|
||
return applied;
|
||
},
|
||
|
||
removeHighlight: function(id) {
|
||
var doc = getFrameDoc();
|
||
if (!doc) return;
|
||
var marks = doc.querySelectorAll('[data-hl-id="' + id + '"]');
|
||
for (var i = 0; i < marks.length; i++) {
|
||
var mark = marks[i];
|
||
if (mark.tagName === 'MOOKNOTE-MARK') {
|
||
var parent = mark.parentNode;
|
||
while (mark.firstChild) parent.insertBefore(mark.firstChild, mark);
|
||
parent.removeChild(mark);
|
||
}
|
||
}
|
||
// 合并相邻文本节点
|
||
if (doc.body) doc.body.normalize();
|
||
},
|
||
|
||
clearAllHighlights: function() {
|
||
var doc = getFrameDoc();
|
||
if (!doc) return;
|
||
var marks = doc.querySelectorAll('mooknote-mark[data-hl-id]');
|
||
for (var i = 0; i < marks.length; i++) {
|
||
var mark = marks[i];
|
||
var parent = mark.parentNode;
|
||
while (mark.firstChild) parent.insertBefore(mark.firstChild, mark);
|
||
parent.removeChild(mark);
|
||
}
|
||
// normalize 合并相邻文本节点
|
||
if (doc.body) doc.body.normalize();
|
||
},
|
||
|
||
clearSelection: function() {
|
||
var win = getFrameWin();
|
||
if (!win) return;
|
||
var sel = win.getSelection();
|
||
if (sel) sel.removeAllRanges();
|
||
},
|
||
|
||
/// 根据 XPath 获取元素所在页码（用于跳转到高亮位置）
|
||
getPageIndexForXPath: function(xpath) {
|
||
var doc = getFrameDoc();
|
||
if (!doc || !xpath) return -1;
|
||
var node = getNodeByXPath(doc, xpath);
|
||
if (!node) return -1;
|
||
return calcPageIndex(doc, node);
|
||
},
|
||
|
||
/// 根据文本内容获取所在页码（XPath 失败时的回退）
|
||
getPageIndexForText: function(text) {
|
||
var doc = getFrameDoc();
|
||
if (!doc || !text) return -1;
|
||
// 遍历所有文本节点，找到包含目标文本的节点
|
||
var walker = doc.createTreeWalker(doc.body, NodeFilter.SHOW_TEXT, null, null);
|
||
var n;
|
||
while (n = walker.nextNode()) {
|
||
if (n.textContent.indexOf(text) !== -1) {
|
||
return calcPageIndex(doc, n);
|
||
}
|
||
}
|
||
// 去掉空白再试
|
||
var cleanText = text.replace(/\s+/g, '');
|
||
walker = doc.createTreeWalker(doc.body, NodeFilter.SHOW_TEXT, null, null);
|
||
while (n = walker.nextNode()) {
|
||
if (n.textContent.replace(/\s+/g, '').indexOf(cleanText) !== -1) {
|
||
return calcPageIndex(doc, n);
|
||
}
|
||
}
|
||
return -1;
|
||
},
|
||
|
||
/// 编程式选中最接近 (x,y) 的文字（单词/句子），并触发 onTextSelection 回调
|
||
selectWordAt: function(x, y) {
|
||
var f = document.getElementById('frame-curr');
|
||
if (!f || !f.contentDocument || !f.contentWindow) {
|
||
console.log('[MN] selectWordAt: no frame');
|
||
return false;
|
||
}
|
||
var doc = f.contentDocument;
|
||
var win = f.contentWindow;
|
||
var iframeRect = f.getBoundingClientRect();
|
||
var localX = x - iframeRect.left;
|
||
var localY = y - iframeRect.top;
|
||
|
||
// 用 caretRangeFromPoint 找到该位置的文本节点
|
||
var range = null;
|
||
if (doc.caretRangeFromPoint) {
|
||
range = doc.caretRangeFromPoint(localX, localY);
|
||
} else if (doc.caretPositionFromPoint) {
|
||
var pos = doc.caretPositionFromPoint(localX, localY);
|
||
if (pos) {
|
||
range = doc.createRange();
|
||
range.setStart(pos.offsetNode, pos.offset);
|
||
range.setEnd(pos.offsetNode, pos.offset);
|
||
}
|
||
}
|
||
if (!range || !range.startContainer || range.startContainer.nodeType !== 3) {
|
||
console.log('[MN] selectWordAt: no text node at (' + x + ',' + y + ')');
|
||
return false;
|
||
}
|
||
|
||
var node = range.startContainer;
|
||
var offset = range.startOffset;
|
||
var text = node.textContent;
|
||
|
||
// 向前找到词/句边界（支持中文和英文）
|
||
var start = offset;
|
||
while (start > 0) {
|
||
var ch = text[start - 1];
|
||
// 遇到空格、标点、换行就停
|
||
if (/[\s。，！？；：、""''（）【】《》\n\r]/.test(ch)) break;
|
||
start--;
|
||
}
|
||
// 向后找到词/句边界
|
||
var end = offset;
|
||
while (end < text.length) {
|
||
var ch = text[end];
|
||
if (/[\s。，！？；：、""''（）【】《》\n\r]/.test(ch)) break;
|
||
end++;
|
||
}
|
||
|
||
// 如果只选中了一个字，尝试扩展到整个句子（按句号分割）
|
||
if (end - start <= 1) {
|
||
start = 0;
|
||
end = text.length;
|
||
}
|
||
|
||
var selRange = doc.createRange();
|
||
selRange.setStart(node, start);
|
||
selRange.setEnd(node, end);
|
||
|
||
// 应用选区
|
||
var sel = win.getSelection();
|
||
sel.removeAllRanges();
|
||
sel.addRange(selRange);
|
||
|
||
var selectedText = sel.toString();
|
||
console.log('[MN] selectWordAt: selected "' + selectedText.substring(0, 30) + '"');
|
||
|
||
var selRect = selRange.getBoundingClientRect();
|
||
var rect = [iframeRect.left + selRect.left, iframeRect.top + selRect.top, selRect.width, selRect.height];
|
||
|
||
var handles = getHandlePositions(f, selRange, iframeRect);
|
||
var info = {
|
||
startXPath: getXPath(selRange.startContainer, doc),
|
||
startOffset: selRange.startOffset,
|
||
endXPath: getXPath(selRange.endContainer, doc),
|
||
endOffset: selRange.endOffset
|
||
};
|
||
|
||
// 触发 onTextSelection 回调
|
||
window.flutter_inappwebview.callHandler('onTextSelection',
|
||
selectedText,
|
||
rect,
|
||
0,
|
||
0,
|
||
handles.start,
|
||
handles.end,
|
||
info
|
||
);
|
||
return true;
|
||
},
|
||
|
||
/// 拖动手柄时扩展选区：将起点或终点移动到 (x, y) 处的文字位置
|
||
extendSelection: function(x, y, isStart) {
|
||
var f = document.getElementById('frame-curr');
|
||
if (!f || !f.contentDocument || !f.contentWindow) return false;
|
||
var doc = f.contentDocument;
|
||
var win = f.contentWindow;
|
||
var iframeRect = f.getBoundingClientRect();
|
||
var localX = x - iframeRect.left;
|
||
var localY = y - iframeRect.top;
|
||
|
||
var pos = null;
|
||
if (doc.caretRangeFromPoint) {
|
||
var r = doc.caretRangeFromPoint(localX, localY);
|
||
if (r) pos = { node: r.startContainer, offset: r.startOffset };
|
||
} else if (doc.caretPositionFromPoint) {
|
||
var p = doc.caretPositionFromPoint(localX, localY);
|
||
if (p) pos = { node: p.offsetNode, offset: p.offset };
|
||
}
|
||
if (!pos) return false;
|
||
|
||
var sel = win.getSelection();
|
||
if (!sel || sel.rangeCount === 0) return false;
|
||
var currentRange = sel.getRangeAt(0);
|
||
|
||
var newRange = doc.createRange();
|
||
if (isStart) {
|
||
// 拖动起点手柄：新起点 = pos，终点 = 原终点
|
||
newRange.setStart(pos.node, pos.offset);
|
||
newRange.setEnd(currentRange.endContainer, currentRange.endOffset);
|
||
} else {
|
||
// 拖动终点手柄：起点 = 原起点，新终点 = pos
|
||
newRange.setStart(currentRange.startContainer, currentRange.startOffset);
|
||
newRange.setEnd(pos.node, pos.offset);
|
||
}
|
||
|
||
// 确保起点在终点之前
|
||
if (newRange.collapsed || currentRange.startContainer === newRange.endContainer && newRange.startOffset > newRange.endOffset) {
|
||
// 反向了，交换
|
||
if (isStart) {
|
||
newRange.setStart(currentRange.endContainer, currentRange.endOffset);
|
||
newRange.setEnd(pos.node, pos.offset);
|
||
} else {
|
||
newRange.setStart(pos.node, pos.offset);
|
||
newRange.setEnd(currentRange.startContainer, currentRange.startOffset);
|
||
}
|
||
}
|
||
|
||
sel.removeAllRanges();
|
||
sel.addRange(newRange);
|
||
|
||
var text = sel.toString();
|
||
var selRect = newRange.getBoundingClientRect();
|
||
var rect = [iframeRect.left + selRect.left, iframeRect.top + selRect.top, selRect.width, selRect.height];
|
||
var handles = getHandlePositions(f, newRange, iframeRect);
|
||
var info = {
|
||
startXPath: getXPath(newRange.startContainer, doc),
|
||
startOffset: newRange.startOffset,
|
||
endXPath: getXPath(newRange.endContainer, doc),
|
||
endOffset: newRange.endOffset
|
||
};
|
||
|
||
window.flutter_inappwebview.callHandler('onTextSelection',
|
||
text,
|
||
rect,
|
||
0,
|
||
0,
|
||
handles.start,
|
||
handles.end,
|
||
info
|
||
);
|
||
return true;
|
||
}
|
||
};
|
||
|
||
// ─── 文本选中检测 ────────────────────────────────────
|
||
var lastText = '';
|
||
var debounceTimer = null;
|
||
|
||
function checkSelection() {
|
||
var f = document.getElementById('frame-curr');
|
||
if (!f || !f.contentWindow || !f.contentDocument) {
|
||
console.log('[MN] checkSelection: no frame');
|
||
return;
|
||
}
|
||
var win = f.contentWindow;
|
||
var doc = f.contentDocument;
|
||
var sel = win.getSelection();
|
||
if (!sel) {
|
||
console.log('[MN] checkSelection: no getSelection');
|
||
return;
|
||
}
|
||
if (sel.isCollapsed || sel.rangeCount === 0) {
|
||
lastText = '';
|
||
return;
|
||
}
|
||
var text = sel.toString();
|
||
if (!text || text === lastText) return;
|
||
lastText = text;
|
||
console.log('[MN] selection detected: ' + text.substring(0, 30));
|
||
|
||
var range = sel.getRangeAt(0);
|
||
var selRect = range.getBoundingClientRect();
|
||
var iframeRect = f.getBoundingClientRect();
|
||
var left = iframeRect.left + selRect.left;
|
||
var top = iframeRect.top + selRect.top;
|
||
|
||
var scrollRatio = 0;
|
||
if (doc.documentElement) {
|
||
var sh = doc.documentElement.scrollHeight - doc.documentElement.clientHeight;
|
||
if (sh > 0) scrollRatio = doc.documentElement.scrollTop / sh;
|
||
}
|
||
|
||
var handles = getHandlePositions(f, range, iframeRect);
|
||
var info = getSelectionInfoInternal();
|
||
|
||
window.flutter_inappwebview.callHandler('onTextSelection',
|
||
text,
|
||
[left, top, selRect.width, selRect.height],
|
||
0,
|
||
scrollRatio,
|
||
handles.start,
|
||
handles.end,
|
||
info
|
||
);
|
||
}
|
||
|
||
/// 获取选区 DOM 信息（XPath + offset），用于高亮持久化
|
||
function getSelectionInfoInternal() {
|
||
var win = getFrameWin();
|
||
if (!win) return null;
|
||
var sel = win.getSelection();
|
||
if (!sel || sel.isCollapsed || sel.rangeCount === 0) return null;
|
||
var range = sel.getRangeAt(0);
|
||
var doc = getFrameDoc();
|
||
if (!doc) return null;
|
||
return {
|
||
startXPath: getXPath(range.startContainer, doc),
|
||
startOffset: range.startOffset,
|
||
endXPath: getXPath(range.endContainer, doc),
|
||
endOffset: range.endOffset
|
||
};
|
||
}
|
||
|
||
/// 获取选区起点和终点的屏幕坐标
|
||
function getHandlePositions(f, range, iframeRect) {
|
||
var rects = range.getClientRects();
|
||
if (rects.length === 0) {
|
||
var r = range.getBoundingClientRect();
|
||
rects = [r];
|
||
}
|
||
var firstRect = rects[0];
|
||
var lastRect = rects[rects.length - 1];
|
||
// 起点手柄：第一行的左下角（手柄线覆盖文字行，圆点在上方）
|
||
var startX = iframeRect.left + firstRect.left;
|
||
var startY = iframeRect.top + firstRect.bottom;
|
||
// 终点手柄：最后一行的右上角（手柄线覆盖文字行，圆点在下方）
|
||
var endX = iframeRect.left + lastRect.right;
|
||
var endY = iframeRect.top + lastRect.top;
|
||
return { start: [startX, startY], end: [endX, endY] };
|
||
}
|
||
|
||
// 每次 iframe 内容变化后重新注入 CSS + 事件监听
|
||
function setupSelectionListener() {
|
||
var f = document.getElementById('frame-curr');
|
||
if (!f || !f.contentDocument) return;
|
||
var doc = f.contentDocument;
|
||
|
||
// 1. 重新注入 user-select CSS（loadFrame 会替换 contentDocument，CSS 会丢失）
|
||
var s = doc.getElementById('_ts_css');
|
||
if (!s) {
|
||
s = doc.createElement('style');
|
||
s.id = '_ts_css';
|
||
doc.head.appendChild(s);
|
||
s.textContent = 'html,body,p,span,div,a,h1,h2,h3,h4,h5,h6,li,td,th,blockquote,figcaption{-webkit-user-select:text!important;-moz-user-select:text!important;user-select:text!important;-webkit-touch-callout:default!important}';
|
||
console.log('[MN] CSS injected into new contentDocument');
|
||
}
|
||
|
||
// 2. 附加事件监听器
|
||
if (doc.__mnSelListener) return;
|
||
doc.__mnSelListener = true;
|
||
console.log('[MN] attaching selection listeners');
|
||
|
||
doc.addEventListener('selectionchange', function() {
|
||
if (debounceTimer) clearTimeout(debounceTimer);
|
||
debounceTimer = setTimeout(checkSelection, 250);
|
||
});
|
||
|
||
doc.addEventListener('touchend', function() {
|
||
if (debounceTimer) clearTimeout(debounceTimer);
|
||
debounceTimer = setTimeout(checkSelection, 350);
|
||
}, true);
|
||
doc.addEventListener('mouseup', function() {
|
||
if (debounceTimer) clearTimeout(debounceTimer);
|
||
debounceTimer = setTimeout(checkSelection, 350);
|
||
}, true);
|
||
}
|
||
|
||
// 定时重新注入 CSS + 重新附加监听器（iframe 内容会在翻页/切换章节时变化）
|
||
setInterval(setupSelectionListener, 500);
|
||
setupSelectionListener();
|
||
console.log('[MN] injection complete');
|
||
})();
|
||
''');
|
||
|
||
widget.callbacks.onInitialized();
|
||
}
|
||
|
||
@override
|
||
Widget build(BuildContext context) {
|
||
return LayoutBuilder(
|
||
builder: (context, constraints) {
|
||
final width = constraints.maxWidth - _currentTheme.padding.horizontal;
|
||
final height = constraints.maxHeight - _currentTheme.padding.vertical;
|
||
_initHeadlessWebViewIfNeeded(width, height);
|
||
|
||
return Stack(
|
||
children: [
|
||
RepaintBoundary(
|
||
key: _repaintKey,
|
||
child: AbsorbPointer(
|
||
child: widget.shouldShowWebView
|
||
? InAppWebView(
|
||
headlessWebView: _headlessWebView,
|
||
initialData: _generateInitialData(width, height),
|
||
initialSettings: defaultSettings,
|
||
shouldInterceptRequest: _shouldInterceptRequest,
|
||
onLoadResourceWithCustomScheme:
|
||
_onLoadResourceWithCustomScheme,
|
||
shouldOverrideUrlLoading: _shouldOverrideUrlLoading,
|
||
onWebViewCreated: _onWebViewCreated,
|
||
onLoadStop: _onLoadStop,
|
||
onConsoleMessage: (controller, consoleMessage) {
|
||
debugPrint('[EPUB-JS] ${consoleMessage.message}');
|
||
},
|
||
)
|
||
: Container(color: _currentTheme.surfaceColor),
|
||
),
|
||
),
|
||
Positioned.fill(
|
||
child: IgnorePointer(
|
||
ignoring: !widget.isLoading && widget.shouldShowWebView,
|
||
child: AnimatedOpacity(
|
||
duration: (widget.isLoading || !widget.shouldShowWebView)
|
||
? Duration.zero
|
||
: const Duration(milliseconds: 250),
|
||
curve: Curves.easeOut,
|
||
opacity: (widget.isLoading || !widget.shouldShowWebView)
|
||
? 1.0
|
||
: 0.0,
|
||
child: Container(
|
||
color: _currentTheme.surfaceColor,
|
||
child: _isSubsequentLoad
|
||
? null
|
||
: Center(
|
||
child: ConstrainedBox(
|
||
constraints: BoxConstraints(
|
||
maxHeight:
|
||
MediaQuery.of(context).size.height * 0.4,
|
||
maxWidth:
|
||
MediaQuery.of(context).size.width * 0.6,
|
||
),
|
||
child: _buildCoverPlaceholder(),
|
||
),
|
||
),
|
||
),
|
||
),
|
||
),
|
||
),
|
||
],
|
||
);
|
||
},
|
||
);
|
||
}
|
||
|
||
/// Simple cover placeholder — loads image from file if available,
|
||
/// otherwise shows a book icon.
|
||
Widget _buildCoverPlaceholder() {
|
||
final path = widget.coverRelativePath;
|
||
if (path != null && path.isNotEmpty) {
|
||
final file = File(path);
|
||
if (file.existsSync()) {
|
||
return ClipRRect(
|
||
borderRadius: BorderRadius.circular(8),
|
||
child: Image.file(file, fit: BoxFit.cover),
|
||
);
|
||
}
|
||
}
|
||
return Container(
|
||
decoration: BoxDecoration(
|
||
color: _currentTheme.colorScheme.surfaceContainerHighest,
|
||
borderRadius: BorderRadius.circular(8),
|
||
),
|
||
child: Icon(
|
||
Icons.book_outlined,
|
||
size: 64,
|
||
color: _currentTheme.colorScheme.onSurfaceVariant,
|
||
),
|
||
);
|
||
}
|
||
|
||
void _setupJavaScriptHandlers(InAppWebViewController controller) {
|
||
controller.addJavaScriptHandler(
|
||
handlerName: 'onPageCountReady',
|
||
callback: (args) async {
|
||
if (args.isNotEmpty && args[0] is int) {
|
||
widget.callbacks.onPageCountReady(args[0] as int);
|
||
}
|
||
},
|
||
);
|
||
|
||
controller.addJavaScriptHandler(
|
||
handlerName: 'onPageChanged',
|
||
callback: (args) {
|
||
if (args.isNotEmpty && args[0] is int) {
|
||
widget.callbacks.onPageChanged(args[0] as int);
|
||
}
|
||
},
|
||
);
|
||
|
||
controller.addJavaScriptHandler(
|
||
handlerName: 'onScrollAnchors',
|
||
callback: (args) {
|
||
if (args.isEmpty) return;
|
||
final List<String> anchors = List<String>.from(args[0] as List);
|
||
widget.callbacks.onScrollAnchors(anchors);
|
||
},
|
||
);
|
||
|
||
controller.addJavaScriptHandler(
|
||
handlerName: 'onTap',
|
||
callback: (args) {
|
||
if (args.isEmpty) return;
|
||
final x = (args[0] as num).toDouble();
|
||
final y = (args[1] as num).toDouble();
|
||
widget.callbacks.onTap(x, y);
|
||
},
|
||
);
|
||
|
||
controller.addJavaScriptHandler(
|
||
handlerName: 'onFootnoteTap',
|
||
callback: (args) {
|
||
if (args.isEmpty) return;
|
||
final innerHtml = args[0] as String;
|
||
final rect = Rect.fromLTWH(
|
||
(args[1] as num).toDouble(),
|
||
(args[2] as num).toDouble(),
|
||
(args[3] as num).toDouble(),
|
||
(args[4] as num).toDouble(),
|
||
);
|
||
final baseUrl = args.length > 5 && args[5] is String
|
||
? args[5] as String
|
||
: '';
|
||
widget.callbacks.onFootnoteTap(innerHtml, rect, baseUrl);
|
||
},
|
||
);
|
||
|
||
controller.addJavaScriptHandler(
|
||
handlerName: 'onLinkTap',
|
||
callback: (args) {
|
||
if (args.isEmpty) return;
|
||
final url = args[0] as String;
|
||
final x = (args[1] as num).toDouble();
|
||
final y = (args[2] as num).toDouble();
|
||
if (widget.callbacks.shouldHandleLinkTap(url)) {
|
||
widget.callbacks.onLinkTap(url);
|
||
} else {
|
||
widget.callbacks.onTap(x, y);
|
||
}
|
||
},
|
||
);
|
||
|
||
controller.addJavaScriptHandler(
|
||
handlerName: 'onImageLongPress',
|
||
callback: (args) {
|
||
if (args.length >= 5 && args[0] is String) {
|
||
final imageUrl = args[0] as String;
|
||
final rect = Rect.fromLTWH(
|
||
(args[1] as num).toDouble(),
|
||
(args[2] as num).toDouble(),
|
||
(args[3] as num).toDouble(),
|
||
(args[4] as num).toDouble(),
|
||
);
|
||
widget.callbacks.onImageLongPress(imageUrl, rect);
|
||
}
|
||
},
|
||
);
|
||
|
||
controller.addJavaScriptHandler(
|
||
handlerName: 'onViewportResize',
|
||
callback: (args) {
|
||
_updateTheme(_currentTheme);
|
||
},
|
||
);
|
||
|
||
controller.addJavaScriptHandler(
|
||
handlerName: 'onEventFinished',
|
||
callback: (args) {
|
||
if (args.isNotEmpty) {
|
||
_bridge.resolveToken(args[0] as int);
|
||
}
|
||
},
|
||
);
|
||
|
||
// ─── 文本选择（划线功能） ────────────────
|
||
controller.addJavaScriptHandler(
|
||
handlerName: 'onTextSelection',
|
||
callback: (args) async {
|
||
debugPrint('[MN] onTextSelection handler called, args: ${args.length}');
|
||
if (args.isEmpty) return;
|
||
final selectedText = args[0] as String? ?? '';
|
||
final rectList = args[1] as List?;
|
||
final spineIndex = (args[2] as num?)?.toInt() ?? 0;
|
||
final scrollRatio = (args[3] as num?)?.toDouble() ?? 0.0;
|
||
Offset? startHandle;
|
||
Offset? endHandle;
|
||
Map<String, dynamic>? selectionInfo;
|
||
if (args.length >= 6) {
|
||
final startList = args[4] as List?;
|
||
final endList = args[5] as List?;
|
||
if (startList != null && startList.length >= 2) {
|
||
startHandle = Offset(
|
||
(startList[0] as num).toDouble(),
|
||
(startList[1] as num).toDouble(),
|
||
);
|
||
}
|
||
if (endList != null && endList.length >= 2) {
|
||
endHandle = Offset(
|
||
(endList[0] as num).toDouble(),
|
||
(endList[1] as num).toDouble(),
|
||
);
|
||
}
|
||
}
|
||
if (args.length >= 7) {
|
||
final rawInfo = args[6];
|
||
if (rawInfo is Map) {
|
||
selectionInfo = Map<String, dynamic>.from(rawInfo);
|
||
}
|
||
}
|
||
debugPrint('[MN] selectedText="$selectedText" info=$selectionInfo');
|
||
Rect? rect;
|
||
if (rectList != null && rectList.length >= 4) {
|
||
rect = Rect.fromLTWH(
|
||
(rectList[0] as num).toDouble(),
|
||
(rectList[1] as num).toDouble(),
|
||
(rectList[2] as num).toDouble(),
|
||
(rectList[3] as num).toDouble(),
|
||
);
|
||
}
|
||
if (selectedText.isNotEmpty && rect != null) {
|
||
widget.callbacks.onTextSelection?.call(
|
||
selectedText,
|
||
rect,
|
||
spineIndex,
|
||
scrollRatio,
|
||
startHandle,
|
||
endHandle,
|
||
selectionInfo,
|
||
);
|
||
}
|
||
},
|
||
);
|
||
}
|
||
|
||
Future<ui.Image?> _takeScreenshot() async {
|
||
if (Platform.isAndroid) {
|
||
// for Android
|
||
final BuildContext? context = _repaintKey.currentContext;
|
||
if (context == null) return null;
|
||
|
||
final RenderRepaintBoundary? boundary =
|
||
context.findRenderObject() as RenderRepaintBoundary?;
|
||
|
||
if (boundary == null) return null;
|
||
ui.Image image = await boundary.toImage(pixelRatio: 3.0);
|
||
return image;
|
||
} else {
|
||
throw UnimplementedError(
|
||
'Do not use screenshot on iOS, it may cause performance issues.',
|
||
);
|
||
}
|
||
}
|
||
|
||
Future<void> _updateTheme(EpubTheme theme) async {
|
||
if (_controller == null) return;
|
||
final width = MediaQuery.of(context).size.width - theme.padding.horizontal;
|
||
final height = MediaQuery.of(context).size.height - theme.padding.vertical;
|
||
_currentTheme = theme;
|
||
await _api.updateTheme(width, height, theme.toThemeMap());
|
||
}
|
||
}
|