generated from dellevin/template
356 lines
12 KiB
Dart
356 lines
12 KiB
Dart
import 'dart:async';
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import 'dart:convert';
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import 'dart:io';
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import 'package:flutter/material.dart';
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import 'package:flutter_inappwebview/flutter_inappwebview.dart';
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import 'package:image_picker/image_picker.dart';
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import 'package:path/path.dart' as p;
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import '../main.dart';
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import '../utils/image_path_helper.dart';
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class VditorEditor extends StatefulWidget {
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final String? initialContent;
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final String noteId;
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final bool isDark;
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final Color surfaceColor;
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final ValueChanged<String>? onContentChanged;
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final ValueChanged<double>? onHeightChanged;
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final String placeholder;
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const VditorEditor({
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super.key,
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this.initialContent,
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required this.noteId,
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this.isDark = false,
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this.surfaceColor = Colors.white,
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this.onContentChanged,
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this.onHeightChanged,
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this.placeholder = '使用 Markdown 格式书写...',
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});
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@override
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State<VditorEditor> createState() => VditorEditorState();
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}
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class VditorEditorState extends State<VditorEditor> {
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InAppWebViewController? _controller;
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bool _isReady = false;
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bool _loadFailed = false;
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String? _distDir; // Windows: 文件系统路径
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double _contentHeight = 200; // WebView 内容高度，随内容撑开
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double _lastKeyboardH = 0; // 上次键盘高度，用于检测键盘弹出
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final Completer<void> _readyCompleter = Completer<void>();
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Timer? _fallbackTimer;
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Future<void> get ready => _readyCompleter.future;
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bool get isReady => _isReady;
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@override
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void initState() {
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super.initState();
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_startFallbackTimer();
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if (Platform.isWindows) {
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_locateDistDir();
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} else {
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// Android/iOS: 直接从 asset 加载，无需定位文件系统路径
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if (mounted) setState(() {});
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}
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}
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void _startFallbackTimer() {
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_fallbackTimer = Timer(const Duration(seconds: 15), () {
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if (!_isReady && mounted) {
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setState(() => _loadFailed = true);
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}
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});
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}
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/// 定位 vditor_dist 目录（Windows 构建时由 CMakeLists 复制到 data/ 下）
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Future<void> _locateDistDir() async {
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try {
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final exePath = Platform.resolvedExecutable;
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final exeDir = p.dirname(exePath);
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final candidate = p.join(exeDir, 'data', 'vditor_dist');
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if (await File(p.join(candidate, 'vditor_editor.html')).exists()) {
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_distDir = candidate;
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if (mounted) setState(() {});
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return;
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}
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debugPrint('[VditorEditor] vditor_dist not found at $candidate');
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if (mounted) setState(() => _loadFailed = true);
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} catch (e) {
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debugPrint('[VditorEditor] locateDistDir error: $e');
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if (mounted) setState(() => _loadFailed = true);
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}
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}
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@override
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void dispose() {
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_fallbackTimer?.cancel();
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_destroyVditor();
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super.dispose();
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}
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Future<void> _destroyVditor() async {
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if (_controller != null) {
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try {
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await _controller!.evaluateJavascript(source: 'destroy()');
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} catch (_) {}
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}
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}
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Future<String> getValue() async {
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if (_controller == null || !_isReady) return widget.initialContent ?? '';
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try {
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final result = await _controller!.evaluateJavascript(source: 'getValue()');
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return result?.toString() ?? '';
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} catch (_) {
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return widget.initialContent ?? '';
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}
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}
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Future<void> setValue(String text) async {
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if (_controller == null || !_isReady) return;
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try {
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final escaped = jsonEncode(text);
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await _controller!.evaluateJavascript(source: 'setValue($escaped)');
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} catch (_) {}
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}
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Future<void> setTheme(bool isDark) async {
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if (_controller == null || !_isReady) return;
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final theme = isDark ? 'dark' : 'light';
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try {
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await _controller!.evaluateJavascript(source: 'setTheme("$theme")');
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} catch (_) {}
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}
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Future<void> setBgColor(String hexColor) async {
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if (_controller == null || !_isReady) return;
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try {
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final escaped = jsonEncode(hexColor);
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await _controller!.evaluateJavascript(source: 'setBgColor($escaped)');
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} catch (_) {}
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}
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Future<void> insertValue(String text) async {
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if (_controller == null || !_isReady) return;
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try {
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final escaped = jsonEncode(text);
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await _controller!.evaluateJavascript(source: 'insertValue($escaped)');
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} catch (_) {}
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}
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Future<void> _scrollToCursor() async {
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if (_controller == null || !_isReady) return;
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try {
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// 延迟一帧让键盘动画完成
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await Future.delayed(const Duration(milliseconds: 300));
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await _controller!.evaluateJavascript(source: 'scrollToCursor()');
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} catch (_) {}
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}
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void _onVditorReady() {
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if (_isReady) return;
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_fallbackTimer?.cancel();
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_isReady = true;
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if (!_readyCompleter.isCompleted) _readyCompleter.complete();
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if (widget.initialContent != null && widget.initialContent!.isNotEmpty) {
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setValue(widget.initialContent!);
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}
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setBgColor(_colorToHex(widget.surfaceColor));
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}
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@override
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void didUpdateWidget(covariant VditorEditor oldWidget) {
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super.didUpdateWidget(oldWidget);
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if (widget.surfaceColor != oldWidget.surfaceColor) {
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setBgColor(_colorToHex(widget.surfaceColor));
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}
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}
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static String _colorToHex(Color color) {
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return '#${(color.value & 0xFFFFFF).toRadixString(16).padLeft(6, '0')}';
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}
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Future<void> _pickImage() async {
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try {
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final picker = ImagePicker();
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final XFile? image = await picker.pickImage(
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source: ImageSource.gallery,
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maxWidth: 1920,
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maxHeight: 1920,
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imageQuality: 85,
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);
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if (image == null) return;
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final fileName = '${DateTime.now().millisecondsSinceEpoch}.jpg';
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final targetDir = await ImagePathHelper.instance.getNoteImagesDir(widget.noteId);
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await ImagePathHelper.instance.ensureDirExists(targetDir);
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final targetPath = p.join(targetDir, fileName);
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await File(image.path).copy(targetPath);
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final mdPath = targetPath.replaceAll('\\', '/');
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if (mounted) await insertValue('');
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} catch (e) {
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debugPrint('[VditorEditor] pickImage error: $e');
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}
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}
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Future<void> _handleImageUpload(String base64Data, String fileName, String mimeType) async {
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try {
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final targetDir = await ImagePathHelper.instance.getNoteImagesDir(widget.noteId);
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await ImagePathHelper.instance.ensureDirExists(targetDir);
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final base64Str = base64Data.contains(',') ? base64Data.split(',')[1] : base64Data;
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final bytes = base64Decode(base64Str);
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final ext = mimeType.contains('png') ? 'png' : 'jpg';
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final savedName = '${DateTime.now().millisecondsSinceEpoch}.$ext';
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final targetPath = p.join(targetDir, savedName);
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await File(targetPath).writeAsBytes(bytes);
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final mdPath = targetPath.replaceAll('\\', '/');
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if (mounted) await insertValue('');
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} catch (e) {
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debugPrint('[VditorEditor] handleImageUpload error: $e');
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}
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}
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@override
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Widget build(BuildContext context) {
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final colors = Theme.of(context).colorScheme;
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if (_loadFailed) {
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return TextField(
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controller: TextEditingController(text: widget.initialContent ?? ''),
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maxLines: null,
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expands: true,
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textAlignVertical: TextAlignVertical.top,
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strutStyle: const StrutStyle(forceStrutHeight: true, height: 1.6, fontSize: 14),
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style: TextStyle(fontSize: 14, color: colors.onSurface, height: 1.6),
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decoration: InputDecoration(
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hintText: widget.placeholder,
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hintStyle: TextStyle(fontSize: 14, color: colors.onSurface.withValues(alpha: 0.25), height: 1.6),
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border: InputBorder.none,
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enabledBorder: InputBorder.none,
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focusedBorder: InputBorder.none,
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contentPadding: const EdgeInsets.all(16),
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),
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onChanged: widget.onContentChanged,
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);
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}
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// Windows: 等待 dist 目录定位完成
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if (Platform.isWindows && _distDir == null) {
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return Center(child: CircularProgressIndicator(strokeWidth: 2, color: colors.primary));
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}
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final String initialUrl;
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if (Platform.isWindows) {
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final htmlPath = p.join(_distDir!, 'vditor_editor.html');
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initialUrl = 'file:///${htmlPath.replaceAll('\\', '/')}';
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} else {
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// Android: 直接访问 APK 内 asset，相对路径自动解析
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initialUrl = 'file:///android_asset/flutter_assets/assets/vditor/dist/vditor_editor.html';
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}
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debugPrint('[VditorEditor] loading: $initialUrl');
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// 键盘弹出时，滚动到光标位置
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final keyboardH = MediaQuery.of(context).viewInsets.bottom;
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if (keyboardH > 0 && _lastKeyboardH == 0 && _isReady) {
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Future.microtask(() => _scrollToCursor());
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}
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_lastKeyboardH = keyboardH;
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return SizedBox(
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height: _contentHeight,
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child: Stack(
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children: [
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Container(
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color: colors.surface,
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child: InAppWebView(
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webViewEnvironment: Platform.isWindows ? windowsWebViewEnvironment : null,
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initialUrlRequest: URLRequest(url: WebUri(initialUrl)),
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initialSettings: InAppWebViewSettings(
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javaScriptEnabled: true,
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transparentBackground: true,
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disableContextMenu: false,
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useHybridComposition: true,
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allowFileAccessFromFileURLs: true,
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allowUniversalAccessFromFileURLs: true,
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),
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onWebViewCreated: (controller) {
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_controller = controller;
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controller.addJavaScriptHandler(
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handlerName: 'onVditorReady',
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callback: (_) => _onVditorReady(),
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);
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controller.addJavaScriptHandler(
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handlerName: 'onContentChanged',
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callback: (args) {
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if (args.isNotEmpty) {
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widget.onContentChanged?.call(args[0].toString());
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}
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},
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);
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controller.addJavaScriptHandler(
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handlerName: 'onPickImage',
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callback: (_) => _pickImage(),
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);
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controller.addJavaScriptHandler(
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handlerName: 'onImageUpload',
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callback: (args) {
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if (args.length >= 3) {
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_handleImageUpload(args[0].toString(), args[1].toString(), args[2].toString());
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}
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},
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);
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controller.addJavaScriptHandler(
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handlerName: 'onHeightChanged',
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callback: (args) {
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if (args.isNotEmpty) {
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final h = double.tryParse(args[0].toString()) ?? _contentHeight;
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if ((h - _contentHeight).abs() > 2 && h > 0) {
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setState(() => _contentHeight = h);
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widget.onHeightChanged?.call(h);
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}
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}
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},
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);
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},
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onLoadStop: (controller, url) async {
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final theme = widget.isDark ? 'dark' : 'light';
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final escapedPlaceholder = jsonEncode(widget.placeholder);
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await controller.evaluateJavascript(
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source: 'initVditor("$theme", $escapedPlaceholder)',
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);
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},
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onReceivedError: (controller, request, error) {
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debugPrint('[VditorEditor] load error: ${error.description}');
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},
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),
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),
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// 加载动画：Vditor 就绪前显示
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if (!_isReady)
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Container(
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color: colors.surface,
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child: Center(
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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SizedBox(
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width: 24,
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height: 24,
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child: CircularProgressIndicator(strokeWidth: 2, color: colors.primary),
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),
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const SizedBox(height: 10),
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Text(
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'编辑器加载中...',
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style: TextStyle(fontSize: 13, color: colors.onSurface.withValues(alpha: 0.4)),
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),
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],
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),
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),
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),
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],
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),
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);
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}
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}
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