### `EdTUI`
<div align="center">
[](https://github.com/preiter93/edtui/actions/workflows/ci.yml)
</div>
#### Overview
`EdTUI` is a text editor widget for the [Ratatui](https://github.com/ratatui-org/ratatui) ecosystem.
It is designed to provide a user experience inspired by Vim. Edtui is developed to be used as an
editor in ratatui apps. It is not supposed to be a stand-alone code editor.
Instantiate the state and render the view:
```rust
use edtui::{EditorState, EditorTheme, EditorView};
use ratatui::widgets::Widget;
let mut state = EditorState::default();
EditorView::new(&mut state)
.theme(EditorTheme::default())
.wrap(true) // line wrapping
.render(area, buf);
```
Handle events:
```rust
use edtui::EditorEventHandler;
let mut event_handler = EditorEventHandler::default();
event_handler.on_key_event(key_event, &mut state);
```
### Features
- Vim-like keybindings and editing modes for efficient text manipulation.
- Copy paste using the systems clipboard.
- Line wrapping.
- Syntax highlighting (experimental).
- Mouse support (experimental).
### Demo
### Keybindings
`EdTUI` offers a set of keybindings similar to Vim. Here are some of the most common keybindings:
##### Normal Mode:
| `i` | Enter Insert mode |
| `v` | Enter Visual mode |
| `h`, `j`, `k`, `l` | Navigate left, down, up, and right |
| `w` | Move forward to the start of a word |
| `e` | Move forward to the end of a word |
| `b` | Move backward to the start of a word |
| `x` | Delete the character under the cursor |
| `u`, `<ctrl>+r` | Undo/Redo last action |
| `Esc` | Escape Visual mode |
| `0` | Move cursor to start of line |
| `^` | Move cursor to first non-blank character |
| `$` | Move cursor to end of line |
| `gg` | Move cursor to the first row |
| `G ` | Move cursor to the last row |
| `%` | Move cursor to closing/opening bracket |
| `a` | Append after the cursor |
| `A` | Append at the end of the line |
| `o` | Add a new line below and enter Insert mode |
| `O` | Add a new line above and enter Insert mode |
| `J` | Join current line with the line below |
| `d` | Delete the selection (Visual mode) |
| `dd` | Delete the current line |
| `D` | Delete to the end of the line |
| `viw` | Select between delimiters. Supported: [`"`] |
| `vi` + `", ', (, [ or {` | Select between delimiter `", ', (, [ or {` |
| `ci` + `", ', (, [ or {` | Change between delimiter `", ', (, [ or {` |
| `u` | Undo the last change |
| `r` | Redo the last undone action |
| `y` | Copy the selected text |
| `p` | Paste the copied text |
##### Insert Mode:
| `Esc` | Return to Normal mode |
| `Backspace` | Delete the previous character |
| `Enter` | Insert line break |
| `Arrows` | Navigation |
For more keybindings and customization options, refer to the code.
### Experimental Mouse Support
`Edtui` includes experimental mouse support:
```rust
let event_handler = EditorEvent::default();
event_handler.on_mouse_event(mouse_event, &mut state);
// or handle both key and mouse event
event_handler.on_event(event, &mut state);
```
**Note**: This feature is experimental, so expect potential bugs and breaking changes. It does
currently not work correctly on wrapped lines.
### Syntax highlighting
Syntax highlighting was added in version `0.8.4`. It is experimental, so expect breaking changes.
`Edtui` offers a number of custom themes, see [`SyntaxHighlighter::theme`] for a complete list.
If you want to use a custom theme, see [`SyntaxHighlighter::custom_theme`]. Check [syntect](https://github.com/trishume/syntect)
for more details about themes and extensions.
```rust
use edtui::EditorState;
use edtui::EditorView;
use edtui::SyntaxHighlighter;
let theme_name = "dracula";
let extension = "rs";
let syntax_highlighter = SyntaxHighlighter::new(theme_name, extension);
EditorView::new(&mut EditorState::default())
.syntax_highlighter(Some(syntax_highlighter))
.render(area, buf);
```
#### Roadmap
- [ ] Support termwiz and termion
- [ ] Display line numbers
- [ ] Remap keybindings
License: MIT