562 lines
17 KiB
TypeScript
562 lines
17 KiB
TypeScript
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import { BaseBlockHandler, type IBlockEventHandlers } from '../block.base.js';
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import type { IBlock } from '../../wysiwyg.types.js';
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import { cssManager } from '@design.estate/dees-element';
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/**
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* MarkdownBlockHandler - Handles markdown content with preview/edit toggle
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*
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* Features:
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* - Live markdown preview
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* - Edit/preview mode toggle
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* - Syntax highlighting in edit mode
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* - Common markdown shortcuts
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* - Auto-save on mode switch
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*/
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export class MarkdownBlockHandler extends BaseBlockHandler {
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type = 'markdown';
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render(block: IBlock, isSelected: boolean): string {
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const isEditMode = block.metadata?.isEditMode ?? true;
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const content = block.content || '';
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return `
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<div class="markdown-block-container${isSelected ? ' selected' : ''}"
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data-block-id="${block.id}"
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data-edit-mode="${isEditMode}">
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<div class="markdown-header">
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<div class="markdown-icon">M↓</div>
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<div class="markdown-title">Markdown</div>
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<button class="markdown-toggle-mode" title="${isEditMode ? 'Preview' : 'Edit'}">
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${isEditMode ? '👁️' : '✏️'}
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</button>
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</div>
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<div class="markdown-content">
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${isEditMode ? this.renderEditor(content) : this.renderPreview(content)}
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</div>
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</div>
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`;
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}
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private renderEditor(content: string): string {
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return `
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<textarea class="markdown-editor"
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placeholder="Enter markdown content..."
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spellcheck="false">${this.escapeHtml(content)}</textarea>
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`;
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}
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private renderPreview(content: string): string {
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const html = this.parseMarkdown(content);
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return `
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<div class="markdown-preview">
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${html || '<div class="preview-empty">No content to preview</div>'}
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</div>
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`;
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}
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setup(element: HTMLElement, block: IBlock, handlers: IBlockEventHandlers): void {
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const container = element.querySelector('.markdown-block-container') as HTMLElement;
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const toggleBtn = element.querySelector('.markdown-toggle-mode') as HTMLButtonElement;
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if (!container || !toggleBtn) {
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console.error('MarkdownBlockHandler: Could not find required elements');
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return;
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}
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// Initialize metadata
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if (!block.metadata) block.metadata = {};
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if (block.metadata.isEditMode === undefined) block.metadata.isEditMode = true;
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// Toggle mode button
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toggleBtn.addEventListener('click', (e) => {
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e.preventDefault();
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e.stopPropagation();
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// Save current content if in edit mode
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if (block.metadata.isEditMode) {
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const editor = container.querySelector('.markdown-editor') as HTMLTextAreaElement;
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if (editor) {
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block.content = editor.value;
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}
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}
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// Toggle mode
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block.metadata.isEditMode = !block.metadata.isEditMode;
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// Request UI update
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handlers.onRequestUpdate?.();
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});
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// Setup based on mode
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if (block.metadata.isEditMode) {
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this.setupEditor(element, block, handlers);
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} else {
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this.setupPreview(element, block, handlers);
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}
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}
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private setupEditor(element: HTMLElement, block: IBlock, handlers: IBlockEventHandlers): void {
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const editor = element.querySelector('.markdown-editor') as HTMLTextAreaElement;
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if (!editor) return;
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// Focus handling
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editor.addEventListener('focus', () => handlers.onFocus());
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editor.addEventListener('blur', () => handlers.onBlur());
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// Content changes
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editor.addEventListener('input', () => {
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block.content = editor.value;
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});
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// Keyboard shortcuts
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editor.addEventListener('keydown', (e) => {
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// Tab handling for indentation
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if (e.key === 'Tab') {
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e.preventDefault();
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const start = editor.selectionStart;
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const end = editor.selectionEnd;
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const value = editor.value;
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if (e.shiftKey) {
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// Unindent
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const beforeCursor = value.substring(0, start);
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const lastNewline = beforeCursor.lastIndexOf('\n');
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const lineStart = lastNewline + 1;
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const lineContent = value.substring(lineStart, start);
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if (lineContent.startsWith(' ')) {
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editor.value = value.substring(0, lineStart) + lineContent.substring(2) + value.substring(start);
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editor.selectionStart = editor.selectionEnd = start - 2;
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}
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} else {
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// Indent
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editor.value = value.substring(0, start) + ' ' + value.substring(end);
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editor.selectionStart = editor.selectionEnd = start + 2;
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}
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block.content = editor.value;
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return;
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}
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// Bold shortcut (Ctrl/Cmd + B)
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if ((e.ctrlKey || e.metaKey) && e.key === 'b') {
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e.preventDefault();
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this.wrapSelection(editor, '**', '**');
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block.content = editor.value;
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return;
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}
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// Italic shortcut (Ctrl/Cmd + I)
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if ((e.ctrlKey || e.metaKey) && e.key === 'i') {
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e.preventDefault();
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this.wrapSelection(editor, '_', '_');
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block.content = editor.value;
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return;
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}
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// Link shortcut (Ctrl/Cmd + K)
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if ((e.ctrlKey || e.metaKey) && e.key === 'k') {
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e.preventDefault();
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this.insertLink(editor);
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block.content = editor.value;
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return;
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}
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// Pass other key events to handlers
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handlers.onKeyDown(e);
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});
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// Auto-resize
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this.autoResize(editor);
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editor.addEventListener('input', () => this.autoResize(editor));
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}
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private setupPreview(element: HTMLElement, block: IBlock, handlers: IBlockEventHandlers): void {
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const container = element.querySelector('.markdown-block-container') as HTMLElement;
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const preview = element.querySelector('.markdown-preview') as HTMLElement;
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if (!container || !preview) return;
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// Make preview focusable
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preview.setAttribute('tabindex', '0');
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// Focus handling
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preview.addEventListener('focus', () => handlers.onFocus());
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preview.addEventListener('blur', () => handlers.onBlur());
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// Keyboard navigation
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preview.addEventListener('keydown', (e) => {
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// Switch to edit mode on Enter
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if (e.key === 'Enter' && !e.shiftKey) {
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e.preventDefault();
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block.metadata.isEditMode = true;
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handlers.onRequestUpdate?.();
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return;
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}
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handlers.onKeyDown(e);
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});
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}
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private wrapSelection(editor: HTMLTextAreaElement, before: string, after: string): void {
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const start = editor.selectionStart;
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const end = editor.selectionEnd;
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const selectedText = editor.value.substring(start, end);
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const replacement = before + (selectedText || 'text') + after;
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editor.value = editor.value.substring(0, start) + replacement + editor.value.substring(end);
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if (selectedText) {
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editor.selectionStart = start;
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editor.selectionEnd = start + replacement.length;
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} else {
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editor.selectionStart = start + before.length;
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editor.selectionEnd = start + before.length + 4; // 'text'.length
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}
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editor.focus();
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}
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private insertLink(editor: HTMLTextAreaElement): void {
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const start = editor.selectionStart;
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const end = editor.selectionEnd;
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const selectedText = editor.value.substring(start, end);
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const linkText = selectedText || 'link text';
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const replacement = `[${linkText}](url)`;
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editor.value = editor.value.substring(0, start) + replacement + editor.value.substring(end);
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// Select the URL part
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editor.selectionStart = start + linkText.length + 3; // '[linktext]('.length
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editor.selectionEnd = start + linkText.length + 6; // '[linktext](url'.length
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editor.focus();
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}
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private autoResize(editor: HTMLTextAreaElement): void {
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editor.style.height = 'auto';
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editor.style.height = editor.scrollHeight + 'px';
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}
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private parseMarkdown(markdown: string): string {
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// Basic markdown parsing - in production, use a proper markdown parser
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let html = this.escapeHtml(markdown);
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// Headers
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html = html.replace(/^### (.+)$/gm, '<h3>$1</h3>');
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html = html.replace(/^## (.+)$/gm, '<h2>$1</h2>');
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html = html.replace(/^# (.+)$/gm, '<h1>$1</h1>');
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// Bold
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html = html.replace(/\*\*(.+?)\*\*/g, '<strong>$1</strong>');
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html = html.replace(/__(.+?)__/g, '<strong>$1</strong>');
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// Italic
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html = html.replace(/\*(.+?)\*/g, '<em>$1</em>');
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html = html.replace(/_(.+?)_/g, '<em>$1</em>');
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// Code blocks
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html = html.replace(/```([\s\S]*?)```/g, '<pre><code>$1</code></pre>');
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// Inline code
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html = html.replace(/`(.+?)`/g, '<code>$1</code>');
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// Links
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html = html.replace(/\[([^\]]+)\]\(([^)]+)\)/g, '<a href="$2">$1</a>');
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// Lists
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html = html.replace(/^\* (.+)$/gm, '<li>$1</li>');
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html = html.replace(/^- (.+)$/gm, '<li>$1</li>');
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html = html.replace(/^\d+\. (.+)$/gm, '<li>$1</li>');
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// Wrap consecutive list items
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html = html.replace(/(<li>.*<\/li>\n?)+/g, (match) => {
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return '<ul>' + match + '</ul>';
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});
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// Paragraphs
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html = html.replace(/\n\n/g, '</p><p>');
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html = '<p>' + html + '</p>';
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// Clean up empty paragraphs
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html = html.replace(/<p><\/p>/g, '');
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html = html.replace(/<p>(<h[1-3]>)/g, '$1');
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html = html.replace(/(<\/h[1-3]>)<\/p>/g, '$1');
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html = html.replace(/<p>(<ul>)/g, '$1');
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html = html.replace(/(<\/ul>)<\/p>/g, '$1');
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html = html.replace(/<p>(<pre>)/g, '$1');
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html = html.replace(/(<\/pre>)<\/p>/g, '$1');
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return html;
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}
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private escapeHtml(text: string): string {
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const div = document.createElement('div');
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div.textContent = text;
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return div.innerHTML;
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}
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getContent(element: HTMLElement): string {
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const editor = element.querySelector('.markdown-editor') as HTMLTextAreaElement;
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if (editor) {
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return editor.value;
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}
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// If in preview mode, return the stored content
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const container = element.querySelector('.markdown-block-container');
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const blockId = container?.getAttribute('data-block-id');
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// In real implementation, would need access to block data
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return '';
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}
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setContent(element: HTMLElement, content: string): void {
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const editor = element.querySelector('.markdown-editor') as HTMLTextAreaElement;
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if (editor) {
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editor.value = content;
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this.autoResize(editor);
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}
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}
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getCursorPosition(element: HTMLElement): number | null {
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const editor = element.querySelector('.markdown-editor') as HTMLTextAreaElement;
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return editor ? editor.selectionStart : null;
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}
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setCursorToStart(element: HTMLElement): void {
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const editor = element.querySelector('.markdown-editor') as HTMLTextAreaElement;
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if (editor) {
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editor.selectionStart = editor.selectionEnd = 0;
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editor.focus();
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} else {
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this.focus(element);
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}
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}
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setCursorToEnd(element: HTMLElement): void {
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const editor = element.querySelector('.markdown-editor') as HTMLTextAreaElement;
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if (editor) {
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const length = editor.value.length;
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editor.selectionStart = editor.selectionEnd = length;
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editor.focus();
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} else {
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this.focus(element);
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}
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}
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focus(element: HTMLElement): void {
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const editor = element.querySelector('.markdown-editor') as HTMLTextAreaElement;
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if (editor) {
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editor.focus();
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} else {
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const preview = element.querySelector('.markdown-preview') as HTMLElement;
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preview?.focus();
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}
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}
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focusWithCursor(element: HTMLElement, position: 'start' | 'end' | number = 'end'): void {
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const editor = element.querySelector('.markdown-editor') as HTMLTextAreaElement;
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if (editor) {
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if (position === 'start') {
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this.setCursorToStart(element);
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} else if (position === 'end') {
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this.setCursorToEnd(element);
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} else if (typeof position === 'number') {
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editor.selectionStart = editor.selectionEnd = position;
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editor.focus();
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}
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} else {
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this.focus(element);
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}
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}
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getSplitContent(element: HTMLElement): { before: string; after: string } | null {
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const editor = element.querySelector('.markdown-editor') as HTMLTextAreaElement;
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if (!editor) return null;
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const cursorPos = editor.selectionStart;
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return {
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||
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|
before: editor.value.substring(0, cursorPos),
|
||
|
|
after: editor.value.substring(cursorPos)
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
getStyles(): string {
|
||
|
|
return `
|
||
|
|
/* Markdown Block Container */
|
||
|
|
.markdown-block-container {
|
||
|
|
position: relative;
|
||
|
|
margin: 12px 0;
|
||
|
|
border: 1px solid ${cssManager.bdTheme('#e5e7eb', '#374151')};
|
||
|
|
border-radius: 6px;
|
||
|
|
overflow: hidden;
|
||
|
|
transition: all 0.15s ease;
|
||
|
|
background: ${cssManager.bdTheme('#ffffff', '#111827')};
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-block-container.selected {
|
||
|
|
border-color: ${cssManager.bdTheme('#9ca3af', '#6b7280')};
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Header */
|
||
|
|
.markdown-header {
|
||
|
|
display: flex;
|
||
|
|
align-items: center;
|
||
|
|
gap: 8px;
|
||
|
|
padding: 8px 12px;
|
||
|
|
border-bottom: 1px solid ${cssManager.bdTheme('#e5e7eb', '#374151')};
|
||
|
|
background: ${cssManager.bdTheme('#f9fafb', '#0a0a0a')};
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-icon {
|
||
|
|
font-size: 14px;
|
||
|
|
font-weight: 600;
|
||
|
|
opacity: 0.8;
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-title {
|
||
|
|
flex: 1;
|
||
|
|
font-size: 13px;
|
||
|
|
font-weight: 500;
|
||
|
|
color: ${cssManager.bdTheme('#374151', '#e5e7eb')};
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-toggle-mode {
|
||
|
|
padding: 4px 8px;
|
||
|
|
background: transparent;
|
||
|
|
border: 1px solid ${cssManager.bdTheme('#e5e7eb', '#374151')};
|
||
|
|
border-radius: 4px;
|
||
|
|
font-size: 14px;
|
||
|
|
cursor: pointer;
|
||
|
|
transition: all 0.15s ease;
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-toggle-mode:hover {
|
||
|
|
background: ${cssManager.bdTheme('#f3f4f6', '#1f2937')};
|
||
|
|
border-color: ${cssManager.bdTheme('#d1d5db', '#4b5563')};
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Content */
|
||
|
|
.markdown-content {
|
||
|
|
position: relative;
|
||
|
|
min-height: 120px;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Editor */
|
||
|
|
.markdown-editor {
|
||
|
|
width: 100%;
|
||
|
|
min-height: 120px;
|
||
|
|
padding: 12px;
|
||
|
|
background: transparent;
|
||
|
|
border: none;
|
||
|
|
outline: none;
|
||
|
|
resize: none;
|
||
|
|
font-family: 'Monaco', 'Consolas', 'Courier New', monospace;
|
||
|
|
font-size: 13px;
|
||
|
|
line-height: 1.6;
|
||
|
|
color: ${cssManager.bdTheme('#1f2937', '#f3f4f6')};
|
||
|
|
overflow: hidden;
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-editor::placeholder {
|
||
|
|
color: ${cssManager.bdTheme('#9ca3af', '#6b7280')};
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Preview */
|
||
|
|
.markdown-preview {
|
||
|
|
padding: 12px;
|
||
|
|
min-height: 96px;
|
||
|
|
outline: none;
|
||
|
|
font-size: 14px;
|
||
|
|
line-height: 1.6;
|
||
|
|
color: ${cssManager.bdTheme('#1f2937', '#f3f4f6')};
|
||
|
|
}
|
||
|
|
|
||
|
|
.preview-empty {
|
||
|
|
color: ${cssManager.bdTheme('#9ca3af', '#6b7280')};
|
||
|
|
font-style: italic;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Markdown preview styles */
|
||
|
|
.markdown-preview h1 {
|
||
|
|
font-size: 24px;
|
||
|
|
font-weight: 600;
|
||
|
|
margin: 16px 0 8px 0;
|
||
|
|
color: ${cssManager.bdTheme('#111827', '#f9fafb')};
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-preview h2 {
|
||
|
|
font-size: 20px;
|
||
|
|
font-weight: 600;
|
||
|
|
margin: 14px 0 6px 0;
|
||
|
|
color: ${cssManager.bdTheme('#111827', '#f9fafb')};
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-preview h3 {
|
||
|
|
font-size: 18px;
|
||
|
|
font-weight: 600;
|
||
|
|
margin: 12px 0 4px 0;
|
||
|
|
color: ${cssManager.bdTheme('#111827', '#f9fafb')};
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-preview p {
|
||
|
|
margin: 8px 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-preview ul,
|
||
|
|
.markdown-preview ol {
|
||
|
|
margin: 8px 0;
|
||
|
|
padding-left: 24px;
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-preview li {
|
||
|
|
margin: 4px 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-preview code {
|
||
|
|
background: ${cssManager.bdTheme('#f3f4f6', '#1f2937')};
|
||
|
|
padding: 2px 4px;
|
||
|
|
border-radius: 3px;
|
||
|
|
font-family: 'Monaco', 'Consolas', 'Courier New', monospace;
|
||
|
|
font-size: 0.9em;
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-preview pre {
|
||
|
|
background: ${cssManager.bdTheme('#f3f4f6', '#1f2937')};
|
||
|
|
padding: 12px;
|
||
|
|
border-radius: 4px;
|
||
|
|
overflow-x: auto;
|
||
|
|
margin: 8px 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-preview pre code {
|
||
|
|
background: transparent;
|
||
|
|
padding: 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-preview strong {
|
||
|
|
font-weight: 600;
|
||
|
|
color: ${cssManager.bdTheme('#111827', '#f9fafb')};
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-preview em {
|
||
|
|
font-style: italic;
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-preview a {
|
||
|
|
color: ${cssManager.bdTheme('#3b82f6', '#60a5fa')};
|
||
|
|
text-decoration: none;
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-preview a:hover {
|
||
|
|
text-decoration: underline;
|
||
|
|
}
|
||
|
|
|
||
|
|
.markdown-preview blockquote {
|
||
|
|
border-left: 3px solid ${cssManager.bdTheme('#e5e7eb', '#374151')};
|
||
|
|
padding-left: 12px;
|
||
|
|
margin: 8px 0;
|
||
|
|
color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
|
||
|
|
}
|
||
|
|
`;
|
||
|
|
}
|
||
|
|
}
|