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|
use clap::ArgMatches as Args;
use helix_view::{document::Mode, Document, Editor, Theme, View};
use crate::{compositor::Compositor, ui};
use log::{error, 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::layout::Rect;
// use futures_util::future::BoxFuture;
use futures_util::stream::FuturesUnordered;
use std::pin::Pin;
type BoxFuture<T> = Pin<Box<dyn Future<Output = T> + Send>>;
pub type LspCallback =
BoxFuture<Result<Box<dyn FnOnce(&mut Editor, &mut Compositor) + Send>, anyhow::Error>>;
pub type LspCallbacks = FuturesUnordered<LspCallback>;
pub type LspCallbackWrapper = Box<dyn FnOnce(&mut Editor, &mut Compositor) + Send>;
pub struct Application {
compositor: Compositor,
editor: Editor,
executor: &'static smol::Executor<'static>,
callbacks: LspCallbacks,
}
impl Application {
pub fn new(mut args: Args, executor: &'static smol::Executor<'static>) -> Result<Self, Error> {
use helix_view::editor::Action;
let mut compositor = Compositor::new()?;
let size = compositor.size();
let mut editor = Editor::new(executor, size);
if let Ok(files) = args.values_of_t::<PathBuf>("files") {
for file in files {
editor.open(file, Action::VerticalSplit)?;
}
} else {
editor.new_file(Action::VerticalSplit)?;
}
compositor.push(Box::new(ui::EditorView::new()));
let mut app = Self {
compositor,
editor,
executor,
callbacks: FuturesUnordered::new(),
};
Ok(app)
}
fn render(&mut self) {
let executor = &self.executor;
let editor = &mut self.editor;
let compositor = &mut self.compositor;
let callbacks = &mut self.callbacks;
let mut cx = crate::compositor::Context {
editor,
executor,
callbacks,
scroll: None,
};
compositor.render(&mut cx);
}
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 = futures_util::StreamExt::select_next_some(&mut self.editor.language_servers.incoming) => {
self.handle_language_server_message(call).await
}
callback = futures_util::StreamExt::select_next_some(&mut self.callbacks) => {
self.handle_language_server_callback(callback)
}
}
}
}
pub fn handle_language_server_callback(
&mut self,
callback: Result<LspCallbackWrapper, anyhow::Error>,
) {
if let Ok(callback) = callback {
// TODO: handle Err()
callback(&mut self.editor, &mut self.compositor);
self.render();
}
}
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,
callbacks: &mut self.callbacks,
scroll: None,
};
// Handle key events
let should_redraw = match event {
Some(Ok(Event::Resize(width, height))) => {
self.compositor.resize(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.editor.should_close() {
self.render();
}
}
pub async fn handle_language_server_message(&mut self, call: helix_lsp::Call) {
use helix_lsp::{Call, Notification};
match call {
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 doc = self
.editor
.documents
.iter_mut()
.find(|(_, doc)| doc.path() == path.as_ref());
if let Some((_, doc)) = doc {
let text = doc.text();
let diagnostics = params
.diagnostics
.into_iter()
.map(|diagnostic| {
use helix_core::{
diagnostic::{Range, Severity, Severity::*},
Diagnostic,
};
use helix_lsp::{lsp, util::lsp_pos_to_pos};
use lsp::DiagnosticSeverity;
let language_server = doc.language_server().unwrap();
// TODO: convert inside server
let start = lsp_pos_to_pos(
text,
diagnostic.range.start,
language_server.offset_encoding(),
);
let end = lsp_pos_to_pos(
text,
diagnostic.range.end,
language_server.offset_encoding(),
);
Diagnostic {
range: Range { start, end },
line: diagnostic.range.start.line as usize,
message: diagnostic.message,
severity: diagnostic.severity.map(
|severity| match severity {
DiagnosticSeverity::Error => Error,
DiagnosticSeverity::Warning => Warning,
DiagnosticSeverity::Information => Info,
DiagnosticSeverity::Hint => Hint,
},
),
// code
// source
}
})
.collect();
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!(),
}
}
Call::MethodCall(call) => {
error!("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,
// }),
// );
}
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(())
}
}
|
