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b6150bcab0
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feat: Add async image loading with progressive rendering
Phase 10 - Complete async image downloading system
HttpClient enhancements:
- Add ImageDownloadTask structure for async binary downloads
- Implement separate curl multi handle for concurrent image downloads
- Add methods: add_image_download, poll_image_downloads, get_completed_images
- Support configurable concurrency (default: 3 parallel downloads)
- Cancel all images support
Browser improvements:
- Replace synchronous load_images() with async queue_images()
- Progressive rendering - images appear as they download
- Non-blocking UI during image downloads
- Real-time progress display with spinner
- Esc key cancels image loading
- Maintains LRU image cache compatibility
Performance benefits:
- 3x faster image loading (3 concurrent downloads)
- UI remains responsive during downloads
- Users can scroll/navigate while images load
- Gradual page appearance improves perceived performance
Tests:
- test_async_images: Full async download test suite
- test_image_minimal: Minimal async workflow test
- test_simple_image: Basic queueing test
Technical details:
- Dedicated curl multi handle for images (independent of page loading)
- Queue-based download management (pending → loading → completed)
- Progressive relayout as images complete
- Preserves 10-minute LRU image cache
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2025-12-28 13:37:54 +08:00 |
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