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|
use clap::ArgMatches as Args;
use helix_view::{document::Mode, Document, Editor, Theme, View};
use crate::compositor::Compositor;
use crate::ui;
use log::{debug, info};
use std::{
io::{self, stdout, Stdout, Write},
path::PathBuf,
sync::Arc,
time::Duration,
};
use smol::prelude::*;
use anyhow::Error;
use crossterm::{
event::{Event, EventStream},
execute, terminal,
};
use tui::{backend::CrosstermBackend, layout::Rect};
type Terminal = crate::terminal::Terminal<CrosstermBackend<std::io::Stdout>>;
pub struct Application {
compositor: Compositor,
editor: Editor,
terminal: Terminal,
executor: &'static smol::Executor<'static>,
}
impl Application {
pub fn new(mut args: Args, executor: &'static smol::Executor<'static>) -> Result<Self, Error> {
let backend = CrosstermBackend::new(stdout());
let mut terminal = Terminal::new(backend)?;
let size = terminal.size()?;
let mut editor = Editor::new(size);
let files = args.values_of_t::<PathBuf>("files").unwrap();
for file in files {
editor.open(file, executor)?;
}
let mut compositor = Compositor::new();
compositor.push(Box::new(ui::EditorView::new()));
let mut app = Self {
editor,
terminal,
compositor,
executor,
};
Ok(app)
}
fn render(&mut self) {
let executor = &self.executor;
let editor = &mut self.editor;
let compositor = &self.compositor;
let mut cx = crate::compositor::Context { editor, executor };
let area = self.terminal.size().unwrap();
compositor.render(area, self.terminal.current_buffer_mut(), &mut cx);
let pos = compositor.cursor_position(area, &mut cx);
self.terminal.draw();
self.terminal.set_cursor(pos.col as u16, pos.row as u16);
}
pub async fn event_loop(&mut self) {
let mut reader = EventStream::new();
self.render();
loop {
if self.editor.should_close {
break;
}
use futures_util::{select, FutureExt};
select! {
event = reader.next().fuse() => {
self.handle_terminal_events(event)
}
call = self.editor.language_servers.incoming.next().fuse() => {
self.handle_language_server_message(call).await
}
}
}
}
pub fn handle_terminal_events(&mut self, event: Option<Result<Event, crossterm::ErrorKind>>) {
let mut cx = crate::compositor::Context {
editor: &mut self.editor,
executor: &self.executor,
};
// Handle key events
let should_redraw = match event {
Some(Ok(Event::Resize(width, height))) => {
self.terminal.resize(Rect::new(0, 0, width, height));
self.compositor
.handle_event(Event::Resize(width, height), &mut cx)
}
Some(Ok(event)) => self.compositor.handle_event(event, &mut cx),
Some(Err(x)) => panic!(x),
None => panic!(),
};
if should_redraw {
self.render();
// calling render twice here fixes it for some reason
}
}
pub async fn handle_language_server_message(&mut self, call: Option<helix_lsp::Call>) {
use helix_lsp::{Call, Notification};
match call {
Some(Call::Notification(helix_lsp::jsonrpc::Notification {
method, params, ..
})) => {
let notification = Notification::parse(&method, params);
match notification {
Notification::PublishDiagnostics(params) => {
let path = Some(params.uri.to_file_path().unwrap());
let view = self
.editor
.tree
.views()
.map(|(view, _key)| view)
.find(|view| view.doc.path == path);
if let Some(view) = view {
let doc = view.doc.text().slice(..);
let diagnostics = params
.diagnostics
.into_iter()
.map(|diagnostic| {
use helix_lsp::util::lsp_pos_to_pos;
let start = lsp_pos_to_pos(&doc, diagnostic.range.start);
let end = lsp_pos_to_pos(&doc, diagnostic.range.end);
helix_core::Diagnostic {
range: (start, end),
line: diagnostic.range.start.line as usize,
message: diagnostic.message,
// severity
// code
// source
}
})
.collect();
view.doc.diagnostics = diagnostics;
// TODO: we want to process all the events in queue, then render. publishDiagnostic tends to send a whole bunch of events
self.render();
}
}
_ => unreachable!(),
}
}
Some(Call::MethodCall(call)) => {
debug!("Method not found {}", call.method);
// self.language_server.reply(
// call.id,
// // TODO: make a Into trait that can cast to Err(jsonrpc::Error)
// Err(helix_lsp::jsonrpc::Error {
// code: helix_lsp::jsonrpc::ErrorCode::MethodNotFound,
// message: "Method not found".to_string(),
// data: None,
// }),
// );
}
None => (),
e => unreachable!("{:?}", e),
}
}
pub async fn run(&mut self) -> Result<(), Error> {
terminal::enable_raw_mode()?;
let mut stdout = stdout();
execute!(stdout, terminal::EnterAlternateScreen)?;
// Exit the alternate screen and disable raw mode before panicking
let hook = std::panic::take_hook();
std::panic::set_hook(Box::new(move |info| {
execute!(std::io::stdout(), terminal::LeaveAlternateScreen);
terminal::disable_raw_mode();
hook(info);
}));
self.event_loop().await;
// reset cursor shape
write!(stdout, "\x1B[2 q");
execute!(stdout, terminal::LeaveAlternateScreen)?;
terminal::disable_raw_mode()?;
Ok(())
}
}
// TODO: language configs:
// tabSize, fileExtension etc, mapping to tree sitter parser
// themes:
// map tree sitter highlights to color values
//
// TODO: expand highlight thing so we're able to render only viewport range
// TODO: async: maybe pre-cache scopes as empty so we render all graphemes initially as regular
////text until calc finishes
// TODO: scope matching: biggest union match? [string] & [html, string], [string, html] & [ string, html]
// can do this by sorting our theme matches based on array len (longest first) then stopping at the
// first rule that matches (rule.all(|scope| scopes.contains(scope)))
|
