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|
use ratatui::{
crossterm::event::{KeyCode, KeyEvent, KeyModifiers},
style::{Style, Stylize},
text::{ToLine, ToSpan},
widgets::Widget,
};
use tree_sitter_highlight::HighlightConfiguration;
use crate::state::{editor::EditorState, window::Window, GlobalState};
use crate::{cursor::CursorMove, lua};
use super::statusbar::StatusBar;
pub mod theme;
pub mod treesitter;
pub struct LuaEditor {
bar: StatusBar,
scroll: usize,
highlight_config: HighlightConfiguration,
}
impl LuaEditor {
pub fn new() -> Self {
Self {
bar: StatusBar::new()
.left(" [No Name] ")
.left_style(Style::default().on_magenta()),
scroll: 0,
highlight_config: treesitter::new_highlight_configuration(),
}
}
pub fn handle_key_event(&mut self, event: KeyEvent) {
match event.code {
KeyCode::Char('r') if event.modifiers == KeyModifiers::CONTROL => {
EditorState::run(&lua::get())
}
KeyCode::Char(c) => GlobalState::instance_mut().editor.buffer.insert(c),
KeyCode::Backspace => {
GlobalState::instance_mut().editor.buffer.delete();
}
KeyCode::Enter => {
GlobalState::instance_mut().editor.buffer.insert('\n');
}
KeyCode::Left => GlobalState::instance_mut()
.editor
.buffer
.move_cursor(CursorMove::Left(1)),
KeyCode::Right => GlobalState::instance_mut()
.editor
.buffer
.move_cursor(CursorMove::Right(1)),
KeyCode::Up => GlobalState::instance_mut()
.editor
.buffer
.move_cursor(CursorMove::Up(1)),
KeyCode::Down => GlobalState::instance_mut()
.editor
.buffer
.move_cursor(CursorMove::Down(1)),
KeyCode::Home => {}
KeyCode::End => {}
KeyCode::PageUp => {}
KeyCode::PageDown => {}
KeyCode::Tab => GlobalState::instance_mut().editor.buffer.insert('\t'),
KeyCode::BackTab => {}
KeyCode::Delete => {}
KeyCode::Insert => {}
KeyCode::F(_) => {}
KeyCode::Null => {}
KeyCode::Esc => {
let mut state = GlobalState::instance_mut();
state.editor.visible = false;
state.set_focus(Window::View)
}
KeyCode::CapsLock => {}
KeyCode::ScrollLock => {}
KeyCode::NumLock => {}
KeyCode::PrintScreen => {}
KeyCode::Pause => {}
KeyCode::Menu => {}
KeyCode::KeypadBegin => {}
KeyCode::Media(_) => {}
KeyCode::Modifier(_) => {}
}
}
}
impl Widget for &mut LuaEditor {
fn render(self, area: ratatui::prelude::Rect, buf: &mut ratatui::prelude::Buffer)
where
Self: Sized,
{
let state = GlobalState::instance();
let buffer = &state.editor.buffer;
self.bar.render(area, buf);
let inner_area = self.bar.area(area);
let text = buffer.as_string();
let highlights = treesitter::highlighter_split(text.as_bytes(), &self.highlight_config);
let nr_width = (buffer.lines().len().to_string().len() + 1).max(4) as u16;
let mut text_area = inner_area;
text_area.x += nr_width;
let mut span_area = text_area;
let mut current_line = 0;
for (hl, group) in highlights.iter() {
if *group == "\n" {
if current_line >= self.scroll {
span_area.y += 1;
span_area.x = text_area.x;
}
current_line += 1;
} else if current_line >= self.scroll {
let group = group.replace('\t', " ");
let span = group.to_span();
if inner_area.contains(span_area.into()) {
theme::theme_highlight_group(*hl, span).render(span_area, buf);
}
span_area.x += group.len() as u16;
}
}
for i in self.scroll..buffer.lines().len() {
let mut nr_area = span_area;
nr_area.x = inner_area.x;
nr_area.width = nr_width - 1;
nr_area.y = inner_area.y + (i - self.scroll) as u16;
nr_area.height = 1;
if !inner_area.contains(nr_area.into()) {
break;
}
(i + 1).to_line().right_aligned().render(nr_area, buf);
}
let mut cursor_area = text_area;
cursor_area.width = 1;
cursor_area.height = 1;
cursor_area.y += buffer.cursor().y() as u16;
cursor_area.x += buffer.cursor().x() as u16;
let (first, _) = buffer.current_line().split_at(buffer.cursor().x());
for c in first.chars() {
if c == '\t' {
cursor_area.x += 1;
}
}
if self.scroll > buffer.cursor().y() {
self.scroll = buffer.cursor().y();
} else if inner_area.height as usize + self.scroll - 1 < buffer.cursor().y() {
self.scroll = buffer.cursor().y() - inner_area.height as usize + 1;
}
cursor_area.y -= self.scroll as u16;
if inner_area.contains(cursor_area.into()) {
buffer
.current_line()
.chars()
.nth(buffer.cursor().x())
.map(|c| if c == '\t' { ' ' } else { c })
.unwrap_or(' ')
.to_span()
.reversed()
.render(cursor_area, buf);
}
}
}
impl Default for LuaEditor {
fn default() -> Self {
Self {
highlight_config: treesitter::new_highlight_configuration(),
bar: StatusBar::default(),
scroll: 0,
}
}
}
|
