generated from dellevin/template
309 lines
9.6 KiB
Dart
309 lines
9.6 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:provider/provider.dart';
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import '../../models/note_plus_models.dart';
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import '../../providers/note_plus_provider.dart';
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import 'note_plus_block_widget.dart';
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import 'slash_command_menu.dart';
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/// Note Plus 块编辑器
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///
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/// 管理 block 列表、焦点切换、键盘事件处理。
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/// 使用 ReorderableListView 支持拖拽排序。
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class NotePlusEditor extends StatefulWidget {
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const NotePlusEditor({super.key});
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@override
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State<NotePlusEditor> createState() => _NotePlusEditorState();
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}
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class _NotePlusEditorState extends State<NotePlusEditor> {
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final ScrollController _scrollController = ScrollController();
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final Map<String, TextEditingController> _controllers = {};
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final Map<String, FocusNode> _focusNodes = {};
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OverlayEntry? _slashMenuOverlay;
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@override
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void dispose() {
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_scrollController.dispose();
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for (final c in _controllers.values) {
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c.dispose();
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}
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for (final fn in _focusNodes.values) {
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fn.dispose();
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}
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_removeSlashMenu();
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super.dispose();
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}
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TextEditingController _getController(NoteBlock block) {
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return _controllers.putIfAbsent(block.id, () {
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final c = TextEditingController(text: block.text);
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c.addListener(() => _onControllerChanged(block));
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return c;
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});
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}
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FocusNode _getFocusNode(NoteBlock block, int index) {
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return _focusNodes.putIfAbsent(block.id, () {
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final fn = FocusNode(onKeyEvent: (node, event) => _handleKeyEvent(index, event));
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fn.addListener(() {
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if (fn.hasFocus) {
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context.read<NotePlusProvider>().setFocusedBlock(index);
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}
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});
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return fn;
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});
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}
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/// 清理已删除 block 对应的控制器和焦点节点
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void _cleanupStaleEntries(List<NoteBlock> currentBlocks) {
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final currentIds = currentBlocks.map((b) => b.id).toSet();
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final staleIds = _controllers.keys.where((id) => !currentIds.contains(id)).toList();
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for (final id in staleIds) {
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_controllers.remove(id)?.dispose();
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}
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final staleFocusIds = _focusNodes.keys.where((id) => !currentIds.contains(id)).toList();
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for (final id in staleFocusIds) {
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_focusNodes.remove(id)?.dispose();
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}
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}
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void _onControllerChanged(NoteBlock block) {
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final provider = context.read<NotePlusProvider>();
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final idx = provider.blocks.indexWhere((b) => b.id == block.id);
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if (idx < 0) return;
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final text = _controllers[block.id]!.text;
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// 更新 block 文本（静默，不 rebuild）
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provider.updateBlockSilent(
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idx,
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provider.blocks[idx].copyWith(text: text),
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);
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// 检测斜杠命令
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if (text == '/' || (text.startsWith('/') && text.length > 1)) {
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_showSlashMenu(idx, text);
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} else {
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_removeSlashMenu();
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}
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}
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void _onBlockTap(int index) {
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final provider = context.read<NotePlusProvider>();
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provider.setFocusedBlock(index);
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final block = provider.blocks[index];
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if (block.type == NoteBlockType.divider) return;
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final node = _getFocusNode(block, index);
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if (!node.hasFocus) {
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node.requestFocus();
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}
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}
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void _onToggleChecklist(int index) {
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context.read<NotePlusProvider>().toggleChecklist(index);
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}
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/// 处理键盘事件
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KeyEventResult _handleKeyEvent(int index, KeyEvent event) {
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if (event is! KeyDownEvent) return KeyEventResult.ignored;
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final provider = context.read<NotePlusProvider>();
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final block = provider.blocks[index];
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final controller = _controllers[block.id];
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if (controller == null) return KeyEventResult.ignored;
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final sel = controller.selection;
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// Enter → 分割 block
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if (event.logicalKey == LogicalKeyboardKey.enter &&
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!HardwareKeyboard.instance.isShiftPressed) {
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final pos = sel.isValid ? sel.baseOffset : controller.text.length;
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provider.splitBlock(index, pos);
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// 聚焦新 block
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WidgetsBinding.instance.addPostFrameCallback((_) {
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_focusBlockAtIndex(index + 1, atStart: true);
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});
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return KeyEventResult.handled;
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}
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// Backspace 在位置0 → 合并到前一个
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if (event.logicalKey == LogicalKeyboardKey.backspace &&
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sel.isValid &&
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sel.isCollapsed &&
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sel.baseOffset == 0 &&
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index > 0) {
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final cursorPos = provider.mergeWithPrevious(index);
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WidgetsBinding.instance.addPostFrameCallback((_) {
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_focusBlockAtIndex(index - 1, atCursor: cursorPos);
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});
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return KeyEventResult.handled;
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}
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// ↑ 在位置0 → 聚焦上一个
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if (event.logicalKey == LogicalKeyboardKey.arrowUp &&
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sel.isValid &&
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sel.isCollapsed &&
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sel.baseOffset == 0 &&
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index > 0) {
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_focusBlockAtIndex(index - 1, atEnd: true);
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return KeyEventResult.handled;
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}
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// ↓ 在末位 → 聚焦下一个
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if (event.logicalKey == LogicalKeyboardKey.arrowDown &&
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sel.isValid &&
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sel.isCollapsed &&
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sel.baseOffset == controller.text.length &&
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index < provider.blocks.length - 1) {
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_focusBlockAtIndex(index + 1, atStart: true);
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return KeyEventResult.handled;
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}
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return KeyEventResult.ignored;
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}
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void _focusBlockAtIndex(int index, {bool atStart = false, bool atEnd = false, int? atCursor}) {
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final provider = context.read<NotePlusProvider>();
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if (index < 0 || index >= provider.blocks.length) return;
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final block = provider.blocks[index];
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if (block.type == NoteBlockType.divider) return;
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provider.setFocusedBlock(index);
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final node = _getFocusNode(block, index);
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final controller = _getController(block);
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// 等 controller 同步后设置光标
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WidgetsBinding.instance.addPostFrameCallback((_) {
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if (!node.hasFocus) node.requestFocus();
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int cursorPos;
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if (atCursor != null) {
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cursorPos = atCursor;
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} else if (atEnd) {
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cursorPos = controller.text.length;
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} else {
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cursorPos = 0;
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}
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controller.selection = TextSelection.collapsed(offset: cursorPos);
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});
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}
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// ========== Slash Menu ==========
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void _showSlashMenu(int blockIndex, String text) {
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_removeSlashMenu();
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final query = text.length > 1 ? text.substring(1) : '';
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_slashMenuOverlay = OverlayEntry(
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builder: (context) => Positioned(
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bottom: MediaQuery.of(context).viewInsets.bottom + 60,
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left: 16,
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right: 16,
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child: Material(
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elevation: 8,
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borderRadius: BorderRadius.circular(12),
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child: SlashCommandMenu(
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query: query,
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onSelect: (type) {
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_removeSlashMenu();
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final provider = context.read<NotePlusProvider>();
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// 清除 / 文本
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provider.updateBlockSilent(
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blockIndex,
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provider.blocks[blockIndex].copyWith(text: ''),
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);
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_controllers[provider.blocks[blockIndex].id]?.text = '';
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// 转换类型
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provider.convertBlockType(blockIndex, type);
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},
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onDismiss: _removeSlashMenu,
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),
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),
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),
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);
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Overlay.of(context).insert(_slashMenuOverlay!);
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}
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void _removeSlashMenu() {
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_slashMenuOverlay?.remove();
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_slashMenuOverlay = null;
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}
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// ========== Build ==========
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@override
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Widget build(BuildContext context) {
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return Consumer<NotePlusProvider>(
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builder: (context, provider, _) {
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final blocks = provider.blocks;
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// 清理已删除 block 对应的控制器和焦点节点，防止内存泄漏
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_cleanupStaleEntries(blocks);
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return ListView.builder(
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controller: _scrollController,
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itemCount: blocks.length,
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itemBuilder: (context, index) {
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final block = blocks[index];
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final isFocused = provider.focusedBlockIndex == index;
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// 计算有序列表序号
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int numberedIndex = 1;
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if (block.type == NoteBlockType.numberedList) {
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for (int i = index - 1; i >= 0; i--) {
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if (blocks[i].type == NoteBlockType.numberedList) {
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numberedIndex++;
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} else {
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break;
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}
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}
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}
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// 同步 controller 文本
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final controller = isFocused ? _getController(block) : null;
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if (controller != null && controller.text != block.text) {
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// 用 addPostFrameCallback 避免 build 期间修改
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WidgetsBinding.instance.addPostFrameCallback((_) {
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if (controller.text != block.text) {
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controller.text = block.text;
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}
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});
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}
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return Padding(
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key: ValueKey(block.id),
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padding: const EdgeInsets.symmetric(horizontal: 16),
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child: Row(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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// Block 内容
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Expanded(
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child: NotePlusBlockWidget(
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block: block,
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index: index,
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numberedIndex: numberedIndex,
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isFocused: isFocused,
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controller: controller,
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focusNode: isFocused ? _getFocusNode(block, index) : null,
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onTap: () => _onBlockTap(index),
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onToggleChecklist: block.type == NoteBlockType.checklist
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? () => _onToggleChecklist(index)
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: null,
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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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}
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