1use crate::{Anchor, Autoscroll, Editor, Event, MultiBuffer, ToOffset, ToPoint as _};
2use anyhow::Result;
3use gpui::{
4 elements::*, AppContext, Entity, ModelContext, ModelHandle, MutableAppContext, RenderContext,
5 Subscription, Task, View, ViewContext, ViewHandle, WeakModelHandle,
6};
7use language::{Buffer, Diagnostic, File as _};
8use postage::watch;
9use project::{File, ProjectPath, Worktree};
10use std::fmt::Write;
11use std::path::Path;
12use std::rc::Rc;
13use text::{Point, Selection};
14use util::TryFutureExt;
15use workspace::{
16 ItemHandle, ItemView, ItemViewHandle, Navigation, PathOpener, Settings, StatusItemView,
17 WeakItemHandle, Workspace,
18};
19
20pub struct BufferOpener;
21
22#[derive(Clone)]
23pub struct BufferItemHandle(pub ModelHandle<Buffer>);
24
25#[derive(Clone)]
26struct WeakBufferItemHandle(WeakModelHandle<Buffer>);
27
28impl PathOpener for BufferOpener {
29 fn open(
30 &self,
31 worktree: &mut Worktree,
32 project_path: ProjectPath,
33 cx: &mut ModelContext<Worktree>,
34 ) -> Option<Task<Result<Box<dyn ItemHandle>>>> {
35 let buffer = worktree.open_buffer(project_path.path, cx);
36 let task = cx.spawn(|_, _| async move {
37 let buffer = buffer.await?;
38 Ok(Box::new(BufferItemHandle(buffer)) as Box<dyn ItemHandle>)
39 });
40 Some(task)
41 }
42}
43
44impl ItemHandle for BufferItemHandle {
45 fn add_view(
46 &self,
47 window_id: usize,
48 workspace: &Workspace,
49 navigation: Rc<Navigation>,
50 cx: &mut MutableAppContext,
51 ) -> Box<dyn ItemViewHandle> {
52 let buffer = cx.add_model(|cx| MultiBuffer::singleton(self.0.clone(), cx));
53 let weak_buffer = buffer.downgrade();
54 Box::new(cx.add_view(window_id, |cx| {
55 let mut editor = Editor::for_buffer(
56 buffer,
57 crate::settings_builder(weak_buffer, workspace.settings()),
58 cx,
59 );
60 editor.navigation = Some(navigation);
61 editor
62 }))
63 }
64
65 fn boxed_clone(&self) -> Box<dyn ItemHandle> {
66 Box::new(self.clone())
67 }
68
69 fn to_any(&self) -> gpui::AnyModelHandle {
70 self.0.clone().into()
71 }
72
73 fn downgrade(&self) -> Box<dyn workspace::WeakItemHandle> {
74 Box::new(WeakBufferItemHandle(self.0.downgrade()))
75 }
76
77 fn project_path(&self, cx: &AppContext) -> Option<ProjectPath> {
78 File::from_dyn(self.0.read(cx).file()).map(|f| ProjectPath {
79 worktree_id: f.worktree_id(cx),
80 path: f.path().clone(),
81 })
82 }
83
84 fn id(&self) -> usize {
85 self.0.id()
86 }
87}
88
89impl WeakItemHandle for WeakBufferItemHandle {
90 fn upgrade(&self, cx: &AppContext) -> Option<Box<dyn ItemHandle>> {
91 self.0
92 .upgrade(cx)
93 .map(|buffer| Box::new(BufferItemHandle(buffer)) as Box<dyn ItemHandle>)
94 }
95
96 fn id(&self) -> usize {
97 self.0.id()
98 }
99}
100
101impl ItemView for Editor {
102 type ItemHandle = BufferItemHandle;
103
104 fn item_handle(&self, cx: &AppContext) -> Self::ItemHandle {
105 BufferItemHandle(self.buffer.read(cx).as_singleton().unwrap())
106 }
107
108 fn navigate(&mut self, data: Box<dyn std::any::Any>, cx: &mut ViewContext<Self>) {
109 if let Some(anchor) = data.downcast_ref::<Anchor>() {
110 let offset = anchor.to_offset(&self.buffer.read(cx).read(cx));
111 self.select_ranges([offset..offset], Some(Autoscroll::Fit), cx);
112 }
113 }
114
115 fn title(&self, cx: &AppContext) -> String {
116 let filename = self
117 .buffer()
118 .read(cx)
119 .file(cx)
120 .and_then(|file| file.file_name());
121 if let Some(name) = filename {
122 name.to_string_lossy().into()
123 } else {
124 "untitled".into()
125 }
126 }
127
128 fn project_path(&self, cx: &AppContext) -> Option<ProjectPath> {
129 File::from_dyn(self.buffer().read(cx).file(cx)).map(|file| ProjectPath {
130 worktree_id: file.worktree_id(cx),
131 path: file.path().clone(),
132 })
133 }
134
135 fn clone_on_split(&self, cx: &mut ViewContext<Self>) -> Option<Self>
136 where
137 Self: Sized,
138 {
139 Some(self.clone(cx))
140 }
141
142 fn deactivated(&mut self, cx: &mut ViewContext<Self>) {
143 self.push_to_navigation_history(cx);
144 }
145
146 fn is_dirty(&self, cx: &AppContext) -> bool {
147 self.buffer().read(cx).read(cx).is_dirty()
148 }
149
150 fn has_conflict(&self, cx: &AppContext) -> bool {
151 self.buffer().read(cx).read(cx).has_conflict()
152 }
153
154 fn can_save(&self, cx: &AppContext) -> bool {
155 self.project_path(cx).is_some()
156 }
157
158 fn save(&mut self, cx: &mut ViewContext<Self>) -> Result<Task<Result<()>>> {
159 let buffer = self.buffer().clone();
160 Ok(cx.spawn(|editor, mut cx| async move {
161 buffer
162 .update(&mut cx, |buffer, cx| buffer.format(cx).log_err())
163 .await;
164 editor.update(&mut cx, |editor, cx| {
165 editor.request_autoscroll(Autoscroll::Fit, cx)
166 });
167 buffer
168 .update(&mut cx, |buffer, cx| buffer.save(cx))?
169 .await?;
170 Ok(())
171 }))
172 }
173
174 fn can_save_as(&self, _: &AppContext) -> bool {
175 true
176 }
177
178 fn save_as(
179 &mut self,
180 worktree: ModelHandle<Worktree>,
181 path: &Path,
182 cx: &mut ViewContext<Self>,
183 ) -> Task<Result<()>> {
184 let buffer = self
185 .buffer()
186 .read(cx)
187 .as_singleton()
188 .expect("cannot call save_as on an excerpt list")
189 .clone();
190
191 buffer.update(cx, |buffer, cx| {
192 let handle = cx.handle();
193 let text = buffer.as_rope().clone();
194 let version = buffer.version();
195
196 let save_as = worktree.update(cx, |worktree, cx| {
197 worktree
198 .as_local_mut()
199 .unwrap()
200 .save_buffer_as(handle, path, text, cx)
201 });
202
203 cx.spawn(|buffer, mut cx| async move {
204 save_as.await.map(|new_file| {
205 let (language, language_server) = worktree.update(&mut cx, |worktree, cx| {
206 let worktree = worktree.as_local_mut().unwrap();
207 let language = worktree
208 .language_registry()
209 .select_language(new_file.full_path())
210 .cloned();
211 let language_server = language
212 .as_ref()
213 .and_then(|language| worktree.register_language(language, cx));
214 (language, language_server.clone())
215 });
216
217 buffer.update(&mut cx, |buffer, cx| {
218 buffer.did_save(version, new_file.mtime, Some(Box::new(new_file)), cx);
219 buffer.set_language(language, language_server, cx);
220 });
221 })
222 })
223 })
224 }
225
226 fn should_activate_item_on_event(event: &Event) -> bool {
227 matches!(event, Event::Activate)
228 }
229
230 fn should_close_item_on_event(event: &Event) -> bool {
231 matches!(event, Event::Closed)
232 }
233
234 fn should_update_tab_on_event(event: &Event) -> bool {
235 matches!(
236 event,
237 Event::Saved | Event::Dirtied | Event::FileHandleChanged
238 )
239 }
240}
241
242pub struct CursorPosition {
243 position: Option<Point>,
244 selected_count: usize,
245 settings: watch::Receiver<Settings>,
246 _observe_active_editor: Option<Subscription>,
247}
248
249impl CursorPosition {
250 pub fn new(settings: watch::Receiver<Settings>) -> Self {
251 Self {
252 position: None,
253 selected_count: 0,
254 settings,
255 _observe_active_editor: None,
256 }
257 }
258
259 fn update_position(&mut self, editor: ViewHandle<Editor>, cx: &mut ViewContext<Self>) {
260 let editor = editor.read(cx);
261 let buffer = editor.buffer().read(cx).snapshot(cx);
262
263 self.selected_count = 0;
264 let mut last_selection: Option<Selection<usize>> = None;
265 for selection in editor.local_selections::<usize>(cx) {
266 self.selected_count += selection.end - selection.start;
267 if last_selection
268 .as_ref()
269 .map_or(true, |last_selection| selection.id > last_selection.id)
270 {
271 last_selection = Some(selection);
272 }
273 }
274 self.position = last_selection.map(|s| s.head().to_point(&buffer));
275
276 cx.notify();
277 }
278}
279
280impl Entity for CursorPosition {
281 type Event = ();
282}
283
284impl View for CursorPosition {
285 fn ui_name() -> &'static str {
286 "CursorPosition"
287 }
288
289 fn render(&mut self, _: &mut RenderContext<Self>) -> ElementBox {
290 if let Some(position) = self.position {
291 let theme = &self.settings.borrow().theme.workspace.status_bar;
292 let mut text = format!("{},{}", position.row + 1, position.column + 1);
293 if self.selected_count > 0 {
294 write!(text, " ({} selected)", self.selected_count).unwrap();
295 }
296 Label::new(text, theme.cursor_position.clone()).boxed()
297 } else {
298 Empty::new().boxed()
299 }
300 }
301}
302
303impl StatusItemView for CursorPosition {
304 fn set_active_pane_item(
305 &mut self,
306 active_pane_item: Option<&dyn ItemViewHandle>,
307 cx: &mut ViewContext<Self>,
308 ) {
309 if let Some(editor) = active_pane_item.and_then(|item| item.to_any().downcast::<Editor>()) {
310 self._observe_active_editor = Some(cx.observe(&editor, Self::update_position));
311 self.update_position(editor, cx);
312 } else {
313 self.position = None;
314 self._observe_active_editor = None;
315 }
316
317 cx.notify();
318 }
319}
320
321pub struct DiagnosticMessage {
322 settings: watch::Receiver<Settings>,
323 diagnostic: Option<Diagnostic>,
324 _observe_active_editor: Option<Subscription>,
325}
326
327impl DiagnosticMessage {
328 pub fn new(settings: watch::Receiver<Settings>) -> Self {
329 Self {
330 diagnostic: None,
331 settings,
332 _observe_active_editor: None,
333 }
334 }
335
336 fn update(&mut self, editor: ViewHandle<Editor>, cx: &mut ViewContext<Self>) {
337 let editor = editor.read(cx);
338 let buffer = editor.buffer().read(cx);
339 let cursor_position = editor.newest_selection::<usize>(&buffer.read(cx)).head();
340 let new_diagnostic = buffer
341 .read(cx)
342 .diagnostics_in_range::<_, usize>(cursor_position..cursor_position)
343 .filter(|entry| !entry.range.is_empty())
344 .min_by_key(|entry| (entry.diagnostic.severity, entry.range.len()))
345 .map(|entry| entry.diagnostic);
346 if new_diagnostic != self.diagnostic {
347 self.diagnostic = new_diagnostic;
348 cx.notify();
349 }
350 }
351}
352
353impl Entity for DiagnosticMessage {
354 type Event = ();
355}
356
357impl View for DiagnosticMessage {
358 fn ui_name() -> &'static str {
359 "DiagnosticMessage"
360 }
361
362 fn render(&mut self, _: &mut RenderContext<Self>) -> ElementBox {
363 if let Some(diagnostic) = &self.diagnostic {
364 let theme = &self.settings.borrow().theme.workspace.status_bar;
365 Flex::row()
366 .with_child(
367 Svg::new("icons/warning.svg")
368 .with_color(theme.diagnostic_icon_color)
369 .constrained()
370 .with_height(theme.diagnostic_icon_size)
371 .contained()
372 .with_margin_right(theme.diagnostic_icon_spacing)
373 .boxed(),
374 )
375 .with_child(
376 Label::new(
377 diagnostic.message.lines().next().unwrap().to_string(),
378 theme.diagnostic_message.clone(),
379 )
380 .boxed(),
381 )
382 .boxed()
383 } else {
384 Empty::new().boxed()
385 }
386 }
387}
388
389impl StatusItemView for DiagnosticMessage {
390 fn set_active_pane_item(
391 &mut self,
392 active_pane_item: Option<&dyn ItemViewHandle>,
393 cx: &mut ViewContext<Self>,
394 ) {
395 if let Some(editor) = active_pane_item.and_then(|item| item.to_any().downcast::<Editor>()) {
396 self._observe_active_editor = Some(cx.observe(&editor, Self::update));
397 self.update(editor, cx);
398 } else {
399 self.diagnostic = Default::default();
400 self._observe_active_editor = None;
401 }
402 cx.notify();
403 }
404}