100 lines
4.0 KiB
Markdown
100 lines
4.0 KiB
Markdown
# WYSIWYG Editor Refactoring Progress Summary
|
|
|
|
## Completed Phases
|
|
|
|
### Phase 1: Infrastructure ✅
|
|
- Created modular block handler architecture
|
|
- Implemented `IBlockHandler` interface and `BaseBlockHandler` class
|
|
- Created `BlockRegistry` for dynamic block type registration
|
|
- Set up proper file structure under `blocks/` directory
|
|
|
|
### Phase 2: Proof of Concept ✅
|
|
- Successfully migrated divider block as the simplest example
|
|
- Validated the architecture works correctly
|
|
- Established patterns for block migration
|
|
|
|
### Phase 3: Text Blocks ✅
|
|
- **Paragraph Block**: Full editing support with text splitting, selection handling, and cursor tracking
|
|
- **Heading Blocks**: All three heading levels (h1, h2, h3) with unified handler
|
|
- **Quote Block**: Italic styling with border, full editing capabilities
|
|
- **Code Block**: Monospace font, tab handling, plain text paste support
|
|
- **List Block**: Bullet/numbered lists with proper list item management
|
|
|
|
## Key Achievements
|
|
|
|
### 1. Preserved Critical Knowledge
|
|
- **Static Rendering**: Blocks use `innerHTML` in `firstUpdated` to prevent focus loss during typing
|
|
- **Shadow DOM Selection**: Implemented `containsAcrossShadowDOM` utility for proper selection detection
|
|
- **Cursor Position Tracking**: All editable blocks track cursor position across multiple events
|
|
- **Content Splitting**: HTML-aware splitting using Range API preserves formatting
|
|
- **Focus Management**: Microtask-based focus restoration ensures reliable cursor placement
|
|
|
|
### 2. Enhanced Architecture
|
|
- Each block type is now self-contained in its own file
|
|
- Block handlers are dynamically registered and loaded
|
|
- Common functionality is shared through base classes
|
|
- Styles are co-located with their block handlers
|
|
|
|
### 3. Maintained Functionality
|
|
- All keyboard navigation works (arrows, backspace, delete, enter)
|
|
- Text selection across Shadow DOM boundaries functions correctly
|
|
- Block merging and splitting behave as before
|
|
- IME (Input Method Editor) support is preserved
|
|
- Formatting shortcuts (Cmd/Ctrl+B/I/U/K) continue to work
|
|
|
|
## Code Organization
|
|
|
|
```
|
|
ts_web/elements/wysiwyg/
|
|
├── dees-wysiwyg-block.ts (simplified main component)
|
|
├── wysiwyg.selection.ts (Shadow DOM selection utilities)
|
|
├── wysiwyg.blockregistration.ts (handler registration)
|
|
└── blocks/
|
|
├── index.ts (exports and registry)
|
|
├── block.base.ts (base handler interface)
|
|
├── decorative/
|
|
│ └── divider.block.ts
|
|
└── text/
|
|
├── paragraph.block.ts
|
|
├── heading.block.ts
|
|
├── quote.block.ts
|
|
├── code.block.ts
|
|
└── list.block.ts
|
|
```
|
|
|
|
## Next Steps
|
|
|
|
### Phase 4: Media Blocks (In Progress)
|
|
- Image block with upload/drag-drop support
|
|
- YouTube block with video embedding
|
|
- Attachment block for file uploads
|
|
|
|
### Phase 5: Content Blocks
|
|
- Markdown block with preview toggle
|
|
- HTML block with raw HTML editing
|
|
|
|
### Phase 6: Cleanup
|
|
- Remove old code from main component
|
|
- Optimize bundle size
|
|
- Update documentation
|
|
|
|
## Technical Improvements
|
|
|
|
1. **Modularity**: Each block type is now completely self-contained
|
|
2. **Extensibility**: New blocks can be added by creating a handler and registering it
|
|
3. **Maintainability**: Files are smaller and focused on single responsibilities
|
|
4. **Type Safety**: Strong TypeScript interfaces ensure consistent implementation
|
|
5. **Performance**: No degradation in performance; potential for lazy loading in future
|
|
|
|
## Migration Pattern
|
|
|
|
For future block migrations, follow this pattern:
|
|
|
|
1. Create block handler extending `BaseBlockHandler`
|
|
2. Implement required methods: `render()`, `setup()`, `getStyles()`
|
|
3. Add helper methods for cursor/content management
|
|
4. Handle Shadow DOM selection properly using utilities
|
|
5. Register handler in `wysiwyg.blockregistration.ts`
|
|
6. Test all interactions (typing, selection, navigation)
|
|
|
|
The refactoring has been successful in making the codebase more maintainable while preserving all the hard-won functionality and edge case handling from the original implementation. |