This change aim to fix the before version `shape_text` (in Element
paint) and `wrap_line` (in TextWrapper cached soft wrap map) may have
difference wrap width.
Now move to based on TextWrapper's wrap map to paint text by use
`shape_line` method.
Close#1193
Ref issue #1220
This PR aim to shape text in visible ranges to reduce `shape_text` time
for large document case.
- Fix rendering might be delayed and cause blanks when scrolling to
follow the selection.
- Fix `RopeExt::lines` method to avoid call `line` method on skipped
iter.
Now with 10K lines plain text, in release mode on macOS. The
`large-text` example can work with:
- 120 FPS for display.
- 90 FPS for update text.
```
MTL_HUD_ENABLED=1 cargo run --example large-text --release
```
- Fixed the cursor position at end of line, also support at start of
line.
https://github.com/user-attachments/assets/1de52f6c-e138-4ed3-a600-06372a807ed8
### Check list
- [x] Modifying Text with Rope
- [x] LineColumn, GoToLine
- [x] Code Highlight
- [x] Delete word, select word
- [x] Delete line
- [x] Move left, right, up, down
## TODO
- [x] Cache highlight result.
- [x] Add a `code-editor` example with more languages test.
- [x] Support setup font to Input (Base on window scope text style).
- [x] Line number
- [x] Change font size and font family.
- [x] Enter newline to keep indent.
- [x] Height with flex_1
- [x] Add to support press `up`, `down` to move cursor to start or end
of the selection, if there is selected.
- [x] Add `Tab`, `Shift-Tab` to indent or outdent for cursor and
selection.
- [x] Double click to select at least 1 char.
https://github.com/user-attachments/assets/af74862d-15a9-4802-b4b4-2aeb606227ec
