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DESKTOP-I3JPKHK\wy
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@ -1115,191 +1115,201 @@ mixin _UpgradeDialogLogic<T extends StatefulWidget> on State<T> {
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/// 递归解析富文本，支持嵌套格式
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///
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/// 支持的格式：
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/// - `**粗体**` - 加粗文本
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/// - `__斜体__` - 斜体文本
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/// - `` `代码` `` - 等宽字体代码
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/// - `[高亮]` - 主题色高亮
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/// - `**粗体**`
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/// - `__斜体__`
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/// - `` `代码` ``
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/// - `[高亮]`
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///
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/// 支持嵌套，例如：
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/// - `__在[学生管理]中添加详情页__` - 斜体中嵌套高亮
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/// - `[高亮**粗体**文本]` - 高亮中嵌套粗体
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/// - `` `代码**粗体**` `` - 代码中嵌套粗体
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///
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/// 处理逻辑：
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/// 1. 找到所有格式标记
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/// 2. 识别嵌套关系（被其他格式完全包围的为内层）
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/// 3. 优先处理最外层格式，递归处理内层内容
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/// 4. 继续处理剩余文本
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/// 采用自定义解析器，逐字符扫描并使用递归解析子内容，从而支持任意嵌套。
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List<TextSpan> _parseRichText(String content, ColorScheme colorScheme) {
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final result = _parseRichTextInternal(content, colorScheme, 0, null);
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return result.spans;
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}
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_RichTextParseResult _parseRichTextInternal(
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String text,
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ColorScheme colorScheme,
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int startIndex,
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String? endToken,
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) {
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final spans = <TextSpan>[];
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final buffer = StringBuffer();
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var index = startIndex;
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// 定义格式标记：使用严格的正则表达式，避免匹配不完整的标记
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// 优先级：[] > ` > ** > __ （内层格式优先）
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final patterns = [
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(regex: RegExp(r'\[([^\]]+)\]'), type: 'highlight'), // [高亮] - 不包含 ] 的内容
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(regex: RegExp(r'`([^`]+)`'), type: 'code'), // `代码` - 不包含 ` 的内容
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(regex: RegExp(r'\*\*([^*]+(?:\*(?!\*)[^*]*)*)\*\*'), type: 'bold'), // **粗体** - 不包含 ** 的内容
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(regex: RegExp(r'__([^_]+(?:_(?!_)[^_]*)*)__'), type: 'italic'), // __斜体__ - 不包含 __ 的内容
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];
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void flushBuffer() {
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if (buffer.isEmpty) return;
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spans.add(TextSpan(
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text: buffer.toString(),
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style: _defaultRichTextStyle(colorScheme),
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));
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buffer.clear();
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}
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// 找到所有匹配的格式标记
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final allMatches = <({Match match, String type, int priority})>[];
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for (int i = 0; i < patterns.length; i++) {
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final pattern = patterns[i];
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for (final match in pattern.regex.allMatches(content)) {
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// 确保匹配的内容不为空
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if (match.group(1) != null && match.group(1)!.isNotEmpty) {
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allMatches.add((match: match, type: pattern.type, priority: i));
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while (index < text.length) {
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// 如果遇到结束标记，返回到上层
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if (endToken != null && text.startsWith(endToken, index)) {
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flushBuffer();
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return _RichTextParseResult(spans, index + endToken.length, true);
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}
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final currentChar = text[index];
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var handled = false;
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// [高亮]
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if (currentChar == '[') {
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final innerResult = _parseRichTextInternal(text, colorScheme, index + 1, ']');
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if (innerResult.closed) {
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flushBuffer();
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final innerText = text.substring(index + 1, innerResult.nextIndex - 1);
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spans.addAll(_applyStyleToSpans(
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innerResult.spans,
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_highlightTextStyle(colorScheme),
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innerText,
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));
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index = innerResult.nextIndex;
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handled = true;
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} else {
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// 无法找到匹配的 ]，按普通文本处理
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buffer.write(currentChar);
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index++;
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handled = true;
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}
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}
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// `代码`
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else if (currentChar == '`') {
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final closingIndex = text.indexOf('`', index + 1);
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if (closingIndex != -1) {
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flushBuffer();
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final codeText = text.substring(index + 1, closingIndex);
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spans.add(TextSpan(
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text: codeText,
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style: _codeTextStyle(colorScheme),
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));
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index = closingIndex + 1;
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handled = true;
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} else {
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// 没有找到闭合的 `，按普通文本处理
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buffer.write(currentChar);
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index++;
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handled = true;
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}
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}
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// **粗体**
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else if (text.startsWith('**', index)) {
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final innerResult = _parseRichTextInternal(text, colorScheme, index + 2, '**');
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if (innerResult.closed) {
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flushBuffer();
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final innerText = text.substring(index + 2, innerResult.nextIndex - 2);
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spans.addAll(_applyStyleToSpans(
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innerResult.spans,
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_boldTextStyle(colorScheme),
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innerText,
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));
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index = innerResult.nextIndex;
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handled = true;
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} else {
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// 没有匹配的 **
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buffer.write('**');
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index += 2;
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handled = true;
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}
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}
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// __斜体__
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else if (text.startsWith('__', index)) {
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final innerResult = _parseRichTextInternal(text, colorScheme, index + 2, '__');
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if (innerResult.closed) {
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flushBuffer();
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final innerText = text.substring(index + 2, innerResult.nextIndex - 2);
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spans.addAll(_applyStyleToSpans(
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innerResult.spans,
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_italicTextStyle(colorScheme),
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innerText,
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));
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index = innerResult.nextIndex;
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handled = true;
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} else {
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buffer.write('__');
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index += 2;
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handled = true;
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}
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}
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if (!handled) {
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buffer.write(currentChar);
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index++;
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}
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}
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// 如果没有匹配，返回普通文本
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if (allMatches.isEmpty) {
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flushBuffer();
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return _RichTextParseResult(spans, index, false);
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}
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TextStyle _defaultRichTextStyle(ColorScheme colorScheme) {
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return TextStyle(
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fontSize: 13,
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color: colorScheme.onSurface.withOpacity(0.8),
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height: 1.4,
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);
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}
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TextStyle _boldTextStyle(ColorScheme colorScheme) {
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return TextStyle(
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fontSize: 13,
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color: colorScheme.onSurface.withOpacity(0.9),
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height: 1.4,
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fontWeight: FontWeight.bold,
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);
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}
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TextStyle _italicTextStyle(ColorScheme colorScheme) {
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return TextStyle(
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fontSize: 13,
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color: colorScheme.onSurface.withOpacity(0.9),
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height: 1.4,
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fontStyle: FontStyle.italic,
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);
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}
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TextStyle _codeTextStyle(ColorScheme colorScheme) {
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return TextStyle(
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fontSize: 12,
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color: colorScheme.primary,
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height: 1.4,
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fontFamily: 'monospace',
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backgroundColor: colorScheme.primaryContainer.withOpacity(0.2),
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);
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}
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TextStyle _highlightTextStyle(ColorScheme colorScheme) {
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return TextStyle(
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fontSize: 13,
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color: colorScheme.primary,
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height: 1.4,
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fontWeight: FontWeight.w600,
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);
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}
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List<TextSpan> _applyStyleToSpans(List<TextSpan> spans, TextStyle style, String fallbackText) {
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if (spans.isEmpty) {
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return [
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TextSpan(
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text: content,
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style: TextStyle(
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fontSize: 13,
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color: colorScheme.onSurface.withOpacity(0.8),
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height: 1.4,
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),
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text: fallbackText,
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style: style,
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),
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];
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}
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// 按位置排序，找到最左边的匹配
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allMatches.sort((a, b) {
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// 先按开始位置排序
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if (a.match.start != b.match.start) {
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return a.match.start.compareTo(b.match.start);
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}
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// 如果开始位置相同，按优先级排序（高优先级在前，即 [] 和 ` 优先）
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if (a.priority != b.priority) {
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return a.priority.compareTo(b.priority);
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}
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// 如果优先级也相同，按结束位置排序（短的在前）
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return a.match.end.compareTo(b.match.end);
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});
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return spans.map((span) => _mergeTextSpanStyle(span, style)).toList();
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}
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// 找到第一个不被其他格式完全包围的匹配（最外层的）
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Match? selectedMatch;
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String? selectedType;
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for (final item in allMatches) {
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bool isNested = false;
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// 检查是否被其他格式完全包围（开始位置更早且结束位置更晚）
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for (final other in allMatches) {
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if (other.match != item.match &&
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other.match.start <= item.match.start &&
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other.match.end >= item.match.end &&
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(other.match.start < item.match.start || other.match.end > item.match.end)) {
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isNested = true;
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break;
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}
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}
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// 选择第一个不被嵌套的匹配
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if (!isNested) {
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selectedMatch = item.match;
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selectedType = item.type;
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break;
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}
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}
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// 如果没找到（理论上不应该发生），使用第一个匹配
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selectedMatch ??= allMatches.first.match;
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selectedType ??= allMatches.first.type;
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int lastIndex = 0;
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// 添加匹配前的普通文本
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if (selectedMatch.start > lastIndex) {
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spans.add(TextSpan(
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text: content.substring(lastIndex, selectedMatch.start),
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style: TextStyle(
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fontSize: 13,
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color: colorScheme.onSurface.withOpacity(0.8),
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height: 1.4,
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),
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));
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}
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// 处理匹配到的格式内容（递归解析，支持嵌套）
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final matchedContent = selectedMatch.group(1)!;
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final nestedSpans = _parseRichText(matchedContent, colorScheme);
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// 应用当前格式的样式
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TextStyle baseStyle;
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switch (selectedType) {
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case 'bold':
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baseStyle = TextStyle(
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fontSize: 13,
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color: colorScheme.onSurface.withOpacity(0.9),
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height: 1.4,
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fontWeight: FontWeight.bold,
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);
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break;
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case 'italic':
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baseStyle = TextStyle(
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fontSize: 13,
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color: colorScheme.onSurface.withOpacity(0.9),
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height: 1.4,
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fontStyle: FontStyle.italic,
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);
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break;
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case 'code':
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baseStyle = TextStyle(
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fontSize: 12,
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color: colorScheme.primary,
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height: 1.4,
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fontFamily: 'monospace',
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backgroundColor: colorScheme.primaryContainer.withOpacity(0.2),
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);
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break;
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case 'highlight':
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baseStyle = TextStyle(
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fontSize: 13,
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color: colorScheme.primary,
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height: 1.4,
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fontWeight: FontWeight.w600,
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);
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break;
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default:
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baseStyle = TextStyle(
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fontSize: 13,
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color: colorScheme.onSurface.withOpacity(0.8),
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height: 1.4,
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);
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}
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// 如果嵌套解析有结果，应用样式；否则直接使用匹配的内容
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if (nestedSpans.isNotEmpty &&
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(nestedSpans.length > 1 || (nestedSpans.isNotEmpty && nestedSpans[0].text != matchedContent))) {
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// 有嵌套格式，应用样式到所有嵌套的spans
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final styledSpans = nestedSpans.map((span) {
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return TextSpan(
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text: span.text,
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style: span.style?.merge(baseStyle) ?? baseStyle,
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children: span.children,
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);
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}).toList();
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spans.addAll(styledSpans);
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} else {
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// 无嵌套格式，直接应用样式
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spans.add(TextSpan(
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text: matchedContent,
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style: baseStyle,
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));
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}
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// 继续解析剩余部分
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lastIndex = selectedMatch.end;
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if (lastIndex < content.length) {
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final remainingSpans = _parseRichText(content.substring(lastIndex), colorScheme);
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spans.addAll(remainingSpans);
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}
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return spans;
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TextSpan _mergeTextSpanStyle(TextSpan span, TextStyle style) {
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final mergedChildren =
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span.children?.map((child) => child is TextSpan ? _mergeTextSpanStyle(child, style) : child).toList();
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return TextSpan(
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text: span.text,
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style: span.style?.merge(style) ?? style,
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children: mergedChildren,
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);
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}
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Widget _buildEnhancedDownloadProgress(BuildContext context, ColorScheme colorScheme) {
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@ -2207,3 +2217,11 @@ class _ToastWidget extends StatelessWidget {
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}
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typedef BoolCallback = void Function(bool success);
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class _RichTextParseResult {
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final List<TextSpan> spans;
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final int nextIndex;
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final bool closed;
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const _RichTextParseResult(this.spans, this.nextIndex, this.closed);
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}
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