1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
|
use helix_core::{syntax, Range, Selection};
use helix_dap::Payload;
use helix_lsp::{lsp, util::lsp_pos_to_pos, LspProgressMap};
use helix_view::{theme, Editor};
use crate::{
args::Args,
commands::{align_view, Align},
compositor::Compositor,
config::Config,
job::Jobs,
ui,
};
use log::error;
use smallvec::smallvec;
use std::{
io::{stdout, Write},
sync::Arc,
time::{Duration, Instant},
};
use anyhow::Error;
use crossterm::{
event::{DisableMouseCapture, EnableMouseCapture, Event, EventStream},
execute, terminal,
};
#[cfg(not(windows))]
use {
signal_hook::{consts::signal, low_level},
signal_hook_tokio::Signals,
};
#[cfg(windows)]
type Signals = futures_util::stream::Empty<()>;
pub struct Application {
compositor: Compositor,
editor: Editor,
// TODO should be separate to take only part of the config
config: Config,
// Currently never read from. Remove the `allow(dead_code)` when
// that changes.
#[allow(dead_code)]
theme_loader: Arc<theme::Loader>,
// Currently never read from. Remove the `allow(dead_code)` when
// that changes.
#[allow(dead_code)]
syn_loader: Arc<syntax::Loader>,
signals: Signals,
jobs: Jobs,
lsp_progress: LspProgressMap,
}
impl Application {
pub fn new(args: Args, mut config: Config) -> Result<Self, Error> {
use helix_view::editor::Action;
let mut compositor = Compositor::new()?;
let size = compositor.size();
let conf_dir = helix_core::config_dir();
let theme_loader =
std::sync::Arc::new(theme::Loader::new(&conf_dir, &helix_core::runtime_dir()));
// load $HOME/.config/helix/languages.toml, fallback to default config
let lang_conf = std::fs::read(conf_dir.join("languages.toml"));
let lang_conf = lang_conf
.as_deref()
.unwrap_or(include_bytes!("../../languages.toml"));
let theme = if let Some(theme) = &config.theme {
match theme_loader.load(theme) {
Ok(theme) => theme,
Err(e) => {
log::warn!("failed to load theme `{}` - {}", theme, e);
theme_loader.default()
}
}
} else {
theme_loader.default()
};
let syn_loader_conf = toml::from_slice(lang_conf).expect("Could not parse languages.toml");
let syn_loader = std::sync::Arc::new(syntax::Loader::new(syn_loader_conf));
let mut editor = Editor::new(
size,
theme_loader.clone(),
syn_loader.clone(),
config.editor.clone(),
);
let editor_view = Box::new(ui::EditorView::new(std::mem::take(&mut config.keys)));
compositor.push(editor_view);
if !args.files.is_empty() {
let first = &args.files[0]; // we know it's not empty
if first.is_dir() {
editor.new_file(Action::VerticalSplit);
compositor.push(Box::new(ui::file_picker(first.clone())));
} else {
let nr_of_files = args.files.len();
editor.open(first.to_path_buf(), Action::VerticalSplit)?;
for file in args.files {
if file.is_dir() {
return Err(anyhow::anyhow!(
"expected a path to file, found a directory. (to open a directory pass it as first argument)"
));
} else {
editor.open(file.to_path_buf(), Action::Load)?;
}
}
editor.set_status(format!("Loaded {} files.", nr_of_files));
}
} else {
editor.new_file(Action::VerticalSplit);
}
editor.set_theme(theme);
#[cfg(windows)]
let signals = futures_util::stream::empty();
#[cfg(not(windows))]
let signals = Signals::new(&[signal::SIGTSTP, signal::SIGCONT])?;
let app = Self {
compositor,
editor,
config,
theme_loader,
syn_loader,
signals,
jobs: Jobs::new(),
lsp_progress: LspProgressMap::new(),
};
Ok(app)
}
fn render(&mut self) {
let editor = &mut self.editor;
let compositor = &mut self.compositor;
let jobs = &mut self.jobs;
let mut cx = crate::compositor::Context {
editor,
jobs,
scroll: None,
};
compositor.render(&mut cx);
}
pub async fn event_loop(&mut self) {
let mut reader = EventStream::new();
let mut last_render = Instant::now();
let deadline = Duration::from_secs(1) / 60;
self.render();
loop {
if self.editor.should_close() {
self.jobs.finish();
break;
}
use futures_util::StreamExt;
tokio::select! {
biased;
event = reader.next() => {
self.handle_terminal_events(event)
}
Some(signal) = self.signals.next() => {
self.handle_signals(signal).await;
}
Some((id, call)) = self.editor.language_servers.incoming.next() => {
self.handle_language_server_message(call, id).await;
// limit render calls for fast language server messages
let last = self.editor.language_servers.incoming.is_empty();
if last || last_render.elapsed() > deadline {
self.render();
last_render = Instant::now();
}
}
Some(payload) = self.editor.debugger_events.next() => {
self.handle_debugger_message(payload).await;
}
Some(callback) = self.jobs.futures.next() => {
self.jobs.handle_callback(&mut self.editor, &mut self.compositor, callback);
self.render();
}
Some(callback) = self.jobs.wait_futures.next() => {
self.jobs.handle_callback(&mut self.editor, &mut self.compositor, callback);
self.render();
}
}
}
}
#[cfg(windows)]
// no signal handling available on windows
pub async fn handle_signals(&mut self, _signal: ()) {}
#[cfg(not(windows))]
pub async fn handle_signals(&mut self, signal: i32) {
use helix_view::graphics::Rect;
match signal {
signal::SIGTSTP => {
self.compositor.save_cursor();
self.restore_term().unwrap();
low_level::emulate_default_handler(signal::SIGTSTP).unwrap();
}
signal::SIGCONT => {
self.claim_term().await.unwrap();
// redraw the terminal
let Rect { width, height, .. } = self.compositor.size();
self.compositor.resize(width, height);
self.compositor.load_cursor();
self.render();
}
_ => unreachable!(),
}
}
pub fn handle_terminal_events(&mut self, event: Option<Result<Event, crossterm::ErrorKind>>) {
let mut cx = crate::compositor::Context {
editor: &mut self.editor,
jobs: &mut self.jobs,
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_debugger_message(&mut self, payload: helix_dap::Payload) {
use helix_dap::{events, Event};
let mut debugger = match self.editor.debugger.as_mut() {
Some(debugger) => debugger,
None => return,
};
match payload {
Payload::Event(ev) => match ev {
Event::Stopped(events::Stopped {
thread_id,
description,
text,
reason,
all_threads_stopped,
..
}) => {
debugger.is_running = false;
let main = debugger
.threads()
.await
.ok()
.and_then(|threads| threads.get(0).cloned());
if let Some(main) = main {
let (bt, _) = debugger.stack_trace(main.id).await.unwrap();
debugger.stack_pointer = bt.get(0).cloned();
debugger.stopped_thread = Some(main.id);
}
let scope = match thread_id {
Some(id) => format!("Thread {}", id),
None => "Target".to_owned(),
};
let mut status = format!("{} stopped because of {}", scope, reason);
if let Some(desc) = description {
status.push_str(&format!(" {}", desc));
}
if let Some(text) = text {
status.push_str(&format!(" {}", text));
}
if all_threads_stopped.unwrap_or_default() {
status.push_str(" (all threads stopped)");
}
if let Some(helix_dap::StackFrame {
source:
Some(helix_dap::Source {
path: Some(src), ..
}),
line,
column,
end_line,
end_column,
..
}) = &debugger.stack_pointer
{
let path = src.clone();
let line = *line;
let column = *column;
let end_line = *end_line;
let end_column = *end_column;
self.editor
.open(path, helix_view::editor::Action::Replace)
.unwrap();
let (view, doc) = current!(self.editor);
let text_end = doc.text().len_chars() - 1;
let start = doc.text().try_line_to_char(line - 1).unwrap_or(0) + column;
if let Some(end_line) = end_line {
let end = doc.text().try_line_to_char(end_line - 1).unwrap_or(0)
+ end_column.unwrap_or(0);
doc.set_selection(
view.id,
Selection::new(
smallvec![Range::new(start.min(text_end), end.min(text_end))],
0,
),
);
} else {
doc.set_selection(view.id, Selection::point(start.min(text_end)));
}
align_view(doc, view, Align::Center);
}
self.editor.set_status(status);
}
Event::Output(events::Output {
category, output, ..
}) => {
let prefix = match category {
Some(category) => {
if &category == "telemetry" {
return;
}
format!("Debug ({}):", category)
}
None => "Debug:".to_owned(),
};
self.editor.set_status(format!("{} {}", prefix, output));
}
Event::Initialized => {
self.editor
.set_status("Debugged application started".to_owned());
}
Event::Continued(_) => {
if let Some(debugger) = self.editor.debugger.as_mut() {
debugger.stopped_thread = None;
debugger.stack_pointer = None;
debugger.is_running = true;
}
}
ev => {
log::warn!("Unhandled event {:?}", ev);
return; // return early to skip render
}
},
Payload::Response(_) => unreachable!(),
Payload::Request(_) => todo!(),
}
self.render();
}
pub async fn handle_language_server_message(
&mut self,
call: helix_lsp::Call,
server_id: usize,
) {
use helix_lsp::{Call, MethodCall, Notification};
let editor_view = self
.compositor
.find(std::any::type_name::<ui::EditorView>())
.expect("expected at least one EditorView");
let editor_view = editor_view
.as_any_mut()
.downcast_mut::<ui::EditorView>()
.unwrap();
match call {
Call::Notification(helix_lsp::jsonrpc::Notification { method, params, .. }) => {
let notification = match Notification::parse(&method, params) {
Some(notification) => notification,
None => return,
};
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()
.filter_map(|diagnostic| {
use helix_core::{
diagnostic::{Range, Severity::*},
Diagnostic,
};
use lsp::DiagnosticSeverity;
let language_server = doc.language_server().unwrap();
// TODO: convert inside server
let start = if let Some(start) = lsp_pos_to_pos(
text,
diagnostic.range.start,
language_server.offset_encoding(),
) {
start
} else {
log::warn!("lsp position out of bounds - {:?}", diagnostic);
return None;
};
let end = if let Some(end) = lsp_pos_to_pos(
text,
diagnostic.range.end,
language_server.offset_encoding(),
) {
end
} else {
log::warn!("lsp position out of bounds - {:?}", diagnostic);
return None;
};
Some(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.set_diagnostics(diagnostics);
}
}
Notification::ShowMessage(params) => {
log::warn!("unhandled window/showMessage: {:?}", params);
}
Notification::LogMessage(params) => {
log::warn!("unhandled window/logMessage: {:?}", params);
}
Notification::ProgressMessage(params) => {
let lsp::ProgressParams { token, value } = params;
let lsp::ProgressParamsValue::WorkDone(work) = value;
let parts = match &work {
lsp::WorkDoneProgress::Begin(lsp::WorkDoneProgressBegin {
title,
message,
percentage,
..
}) => (Some(title), message, percentage),
lsp::WorkDoneProgress::Report(lsp::WorkDoneProgressReport {
message,
percentage,
..
}) => (None, message, percentage),
lsp::WorkDoneProgress::End(lsp::WorkDoneProgressEnd { message }) => {
if message.is_some() {
(None, message, &None)
} else {
self.lsp_progress.end_progress(server_id, &token);
if !self.lsp_progress.is_progressing(server_id) {
editor_view.spinners_mut().get_or_create(server_id).stop();
}
self.editor.clear_status();
// we want to render to clear any leftover spinners or messages
return;
}
}
};
let token_d: &dyn std::fmt::Display = match &token {
lsp::NumberOrString::Number(n) => n,
lsp::NumberOrString::String(s) => s,
};
let status = match parts {
(Some(title), Some(message), Some(percentage)) => {
format!("[{}] {}% {} - {}", token_d, percentage, title, message)
}
(Some(title), None, Some(percentage)) => {
format!("[{}] {}% {}", token_d, percentage, title)
}
(Some(title), Some(message), None) => {
format!("[{}] {} - {}", token_d, title, message)
}
(None, Some(message), Some(percentage)) => {
format!("[{}] {}% {}", token_d, percentage, message)
}
(Some(title), None, None) => {
format!("[{}] {}", token_d, title)
}
(None, Some(message), None) => {
format!("[{}] {}", token_d, message)
}
(None, None, Some(percentage)) => {
format!("[{}] {}%", token_d, percentage)
}
(None, None, None) => format!("[{}]", token_d),
};
if let lsp::WorkDoneProgress::End(_) = work {
self.lsp_progress.end_progress(server_id, &token);
if !self.lsp_progress.is_progressing(server_id) {
editor_view.spinners_mut().get_or_create(server_id).stop();
}
} else {
self.lsp_progress.update(server_id, token, work);
}
if self.config.lsp.display_messages {
self.editor.set_status(status);
}
}
}
}
Call::MethodCall(helix_lsp::jsonrpc::MethodCall {
method, params, id, ..
}) => {
let call = match MethodCall::parse(&method, params) {
Some(call) => call,
None => {
error!("Method not found {}", method);
return;
}
};
match call {
MethodCall::WorkDoneProgressCreate(params) => {
self.lsp_progress.create(server_id, params.token);
let spinner = editor_view.spinners_mut().get_or_create(server_id);
if spinner.is_stopped() {
spinner.start();
}
let doc = self.editor.documents().find(|doc| {
doc.language_server()
.map(|server| server.id() == server_id)
.unwrap_or_default()
});
match doc {
Some(doc) => {
// it's ok to unwrap, we check for the language server before
let server = doc.language_server().unwrap();
tokio::spawn(server.reply(id, Ok(serde_json::Value::Null)));
}
None => {
if let Some(server) =
self.editor.language_servers.get_by_id(server_id)
{
log::warn!(
"missing document with language server id `{}`",
server_id
);
tokio::spawn(server.reply(
id,
Err(helix_lsp::jsonrpc::Error {
code: helix_lsp::jsonrpc::ErrorCode::InternalError,
message: "document missing".to_string(),
data: None,
}),
));
} else {
log::warn!(
"can't find language server with id `{}`",
server_id
);
}
}
}
}
}
// 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),
}
}
async fn claim_term(&mut self) -> Result<(), Error> {
terminal::enable_raw_mode()?;
let mut stdout = stdout();
execute!(stdout, terminal::EnterAlternateScreen)?;
if self.config.editor.mouse {
execute!(stdout, EnableMouseCapture)?;
}
Ok(())
}
fn restore_term(&mut self) -> Result<(), Error> {
let mut stdout = stdout();
// reset cursor shape
write!(stdout, "\x1B[2 q")?;
execute!(stdout, DisableMouseCapture)?;
execute!(stdout, terminal::LeaveAlternateScreen)?;
terminal::disable_raw_mode()?;
Ok(())
}
pub async fn run(&mut self) -> Result<(), Error> {
self.claim_term().await?;
// Exit the alternate screen and disable raw mode before panicking
let hook = std::panic::take_hook();
std::panic::set_hook(Box::new(move |info| {
// We can't handle errors properly inside this closure. And it's
// probably not a good idea to `unwrap()` inside a panic handler.
// So we just ignore the `Result`s.
let _ = execute!(std::io::stdout(), DisableMouseCapture);
let _ = execute!(std::io::stdout(), terminal::LeaveAlternateScreen);
let _ = terminal::disable_raw_mode();
hook(info);
}));
self.event_loop().await;
if self.editor.close_language_servers(None).await.is_err() {
log::error!("Timed out waiting for language servers to shutdown");
};
self.restore_term()?;
Ok(())
}
}
|