3.0 KiB
3.0 KiB
Phase 4 Implementation Summary - Heading Blocks Migration
Overview
Successfully migrated all heading blocks (h1, h2, h3) to the new block handler architecture using a unified HeadingBlockHandler class.
Changes Made
1. Created Unified Heading Handler
- File:
blocks/text/heading.block.ts
- Implemented
HeadingBlockHandler
class extendingBaseBlockHandler
- Single handler class that accepts heading level (1, 2, or 3) in constructor
- Extracted all heading rendering logic from
dees-wysiwyg-block.ts
- Extracted heading setup logic with full text editing support:
- Input handling with cursor tracking
- Selection handling with Shadow DOM support
- Focus/blur management
- Composition events for IME support
- Split content functionality
- Extracted all heading-specific styles for all three levels
2. Registration Updates
- File:
wysiwyg.blockregistration.ts
- Registered three heading handlers using the same class:
heading-1
→new HeadingBlockHandler('heading-1')
heading-2
→new HeadingBlockHandler('heading-2')
heading-3
→new HeadingBlockHandler('heading-3')
- Updated imports to include HeadingBlockHandler
3. Updated Exports
- File:
blocks/index.ts
- Exported
HeadingBlockHandler
class - Removed TODO comment for heading handler
4. Handler Implementation Details
- Dynamic Level Handling: The handler determines the heading level from the block type
- Shared Styles: All heading levels share the same style method but render different CSS
- Placeholder Support: Each level has its own placeholder text
- Full Text Editing: Inherits all paragraph-like functionality:
- Cursor position tracking
- Text selection with Shadow DOM awareness
- Content splitting for Enter key handling
- Focus management with cursor positioning
Key Features Preserved
✅ All three heading levels render with correct styles ✅ Font sizes: h1 (32px), h2 (24px), h3 (20px) ✅ Proper font weights and line heights ✅ Theme-aware colors using cssManager.bdTheme ✅ Contenteditable functionality ✅ Selection and cursor tracking ✅ Keyboard navigation ✅ Focus/blur handling ✅ Placeholder text for empty headings
Architecture Benefits
- Code Reuse: Single handler class for all heading levels
- Consistency: All headings share the same behavior
- Maintainability: Changes to heading behavior only need to be made once
- Type Safety: Heading level is type-checked at construction
- Scalability: Easy to add more heading levels if needed
Testing Results
- ✅ TypeScript compilation successful
- ✅ All three heading handlers registered correctly
- ✅ Render method produces correct HTML with proper classes
- ✅ Placeholders set correctly for each level
- ✅ All handlers are instances of HeadingBlockHandler
Next Steps
Continue with Phase 5 to migrate remaining text blocks:
- Quote block
- Code block
- List block
Each will follow the same pattern but with their specific requirements.