Continue #1131 to fix some scroll offset details.
- Keep line number at left.
- Show scrollbar next the line_numbers right side.
- Fix scroll_size calculate issue that will always show vertical
scrollbar, even not have enough contents.
<img width="888" height="641" alt="image"
src="https://github.com/user-attachments/assets/5d388377-3f6d-4530-b837-6c719e1eb48f"
/>
Ref UITableView API:
https://developer.apple.com/documentation/uikit/uitableviewdatasource
## Changes
- Added some section related API to `ListDelegeate` and
`DropdownDelegate` with default implement, so if you don't need section
that you can just keep the default.
- Added `sections_count` method to get the number of sections, default
is 1.
- Added `render_section_header` for special the section header by if
needed, default return None.
- Added `render_section_footer` for special the section footer by if
needed, default return None.
## Break Changes
- The `DropdownState` have change new method to use IndexPath type:
```diff
- DropdownState::new(vec![], Some(1), window, cx);
+ DropdownState::new(vec![], Some(IndexPath::new(1)), window, cx);
```
- The `ListDelegeate`, `DropdownDelegate` has changed API:
- The `ix` are change from `usize` to `IndexPath`.
```diff
- fn render_item(&self, ix: usize, window: &mut Window, cx: &mut
Context<List<Self>>) -> Option<Self::Item>
+ fn render_item(&self, ix: IndexPath, window: &mut Window, cx: &mut
Context<List<Self>>) -> Option<Self::Item>
- fn set_selected_index(&mut self, ix: Option<usize>, window: &mut
Window, cx: &mut Context<List<Self>>)
+ fn set_selected_index(&mut self, ix: Option<IndexPath>, window: &mut
Window, cx: &mut Context<List<Self>>)
```
- The `items_count` method have added `section` argument to support list
section.
```diff
- fn items_count(&self, cx: &App) -> usize
+ fn items_count(&self, section: usize, cx: &App) -> usize
```
- The `can_load_more` method has renamed to `is_eof` in `ListDelegate`
and `TableDelegate`.
```diff
- fn can_load_more(&self, cx: &App) -> bool
+ fn is_eof(&self, cx: &App) -> bool
```
- The `can_search` method has renamed to `searchable` in `ListDelegate`.
```diff
- fn can_search(&self) -> bool
+ fn searchable(&self) -> bool
```
## Showcase
<img width="1196" height="925" alt="image"
src="https://github.com/user-attachments/assets/22750abe-cc3f-427e-903b-51758bd4e027"
/>
<img width="1214" height="934" alt="image"
src="https://github.com/user-attachments/assets/52d42546-e6e7-4448-9c0f-43cd659fb630"
/>
---------
Co-authored-by: Floyd Wang <gassnake999@gmail.com>
## 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
