Implement getClientRects for text fragment measurement #55280
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Summary: When `getBoundingClientRect()` is called on a nested `<Text>` component (TextShadowNode), return the parent paragraph's bounding rect instead of empty/invalid metrics. TextShadowNode is a virtual node that doesn't have its own layout metrics. This matches web behavior where inline elements return their container's rect. Use `getClientRects()` (added in a follow-up diff) to get the individual fragment rects for text that spans multiple lines. Differential Revision: D91087220
Summary: Adds Android-specific implementation for measuring bounding rectangles of text fragments that belong to a specific React tag. This enables getting the visual boundaries of nested `<Text>` components within a paragraph. The implementation provides two methods: 1. `getFragmentRectsForReactTag` - Uses PreparedLayout for efficient measurement when the enablePreparedTextLayout feature flag is enabled 2. `getFragmentRectsFromAttributedString` - Fallback that creates a layout on-demand when PreparedLayout is not available Key features: - Handles multi-line text fragments by returning a rect for each line - Correctly handles RTL text direction - Converts coordinates between pixels and DIPs These methods are used by the DOM getClientRects() API to provide accurate text fragment boundaries for accessibility and layout inspection. Differential Revision: D91087221
Summary: Adds the core DOM implementation for `getClientRects()` which returns the bounding rectangles of all text fragments belonging to a TextShadowNode within its parent ParagraphShadowNode. This is useful for: - Getting the visual boundaries of nested `<Text>` components within a paragraph - Accessibility tools that need per-line text boundaries - Layout inspection for text that spans multiple lines On Android, the implementation uses the platform's TextLayoutManager to get accurate fragment rects. On other platforms, a simplified fallback returns the paragraph's frame for each fragment. Differential Revision: D91087222
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Summary:
Adds the core DOM implementation for
getClientRects()which returns thebounding rectangles of all text fragments belonging to a TextShadowNode
within its parent ParagraphShadowNode.
This is useful for:
<Text>components within a paragraphOn Android, the implementation uses the platform's TextLayoutManager to get
accurate fragment rects. On other platforms, a simplified fallback returns
the paragraph's frame for each fragment.
Differential Revision: D91087222