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|
use ratatui::{
crossterm::event::{KeyCode, KeyEvent},
layout::Rect,
text::{ToLine, ToSpan},
widgets::{Paragraph, Widget},
};
use tree_sitter_highlight::HighlightConfiguration;
use crate::{config::keymap::EditorKeyMap, lua};
use crate::{
config::{theme::editor::bar::EditorBarTheme, GlobalConfig},
state::{editor::bar::EditorBarState, GlobalState},
tuicursor::TuiCursor,
};
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(),
scroll: 0,
highlight_config: treesitter::new_highlight_configuration(),
}
}
pub fn handle_key_event(&mut self, event: KeyEvent) {
let r = EditorKeyMap::handle(event);
if r.unwrap_or(true) {
match event.code {
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');
}
_ => {}
}
}
}
pub fn render_cursor(&self) -> Option<TuiCursor> {
let state = GlobalState::instance();
let buffer = &state.editor.buffer;
let nr_width = (buffer.lines().len().to_string().len() + 1).max(4) as u16;
let x = buffer.cursor().x()
+ buffer.current_line()[..buffer.cursor().x()]
.chars()
.filter(|c| *c == '\t')
.count();
Some(TuiCursor {
position: (buffer.cursor().y() as u16, x as u16 + nr_width),
style: state.editor.cursor_shape.into(),
})
}
}
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;
let config = GlobalConfig::instance();
let theme = &config.theme.editor;
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;
theme
.background
.get((), &lua::get())
.unwrap_or_default()
.apply(Paragraph::default())
.render(area, buf);
theme
.cursor_line
.get((), &lua::get())
.unwrap_or_default()
.apply(Paragraph::default())
.render(
Rect::new(
text_area.x,
text_area.y + buffer.cursor().y() as u16,
text_area.width,
1,
),
buf,
);
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.highlight.highlight(*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;
nr_area.y = inner_area.y + (i - self.scroll) as u16;
nr_area.height = 1;
if !inner_area.contains(nr_area.into()) {
break;
}
if buffer.cursor().y() == i {
theme
.active_line_number
.get((), &lua::get())
.unwrap_or_default()
} else {
theme.line_number.get((), &lua::get()).unwrap_or_default()
}
.apply(((i + 1).to_string() + " ").to_line())
.right_aligned()
.render(nr_area, buf);
}
}
EditorBarState::apply(&mut self.bar, (), &lua::get());
EditorBarTheme::apply(&mut self.bar, (), &lua::get());
self.bar.render(area, buf);
}
}
impl Default for LuaEditor {
fn default() -> Self {
Self {
highlight_config: treesitter::new_highlight_configuration(),
bar: StatusBar::default(),
scroll: 0,
}
}
}
|
