1use crate::StatusItemView;
2use gpui::{
3 elements::*, impl_actions, platform::CursorStyle, AnyViewHandle, AppContext, Entity,
4 MouseButton, MouseMovedEvent, RenderContext, Subscription, View, ViewContext, ViewHandle,
5};
6use serde::Deserialize;
7use settings::Settings;
8use std::{cell::RefCell, rc::Rc};
9use theme::Theme;
10
11pub trait SidebarItem: View {
12 fn should_activate_item_on_event(&self, _: &Self::Event, _: &AppContext) -> bool {
13 false
14 }
15 fn should_show_badge(&self, cx: &AppContext) -> bool;
16 fn contains_focused_view(&self, _: &AppContext) -> bool {
17 false
18 }
19}
20
21pub trait SidebarItemHandle {
22 fn id(&self) -> usize;
23 fn should_show_badge(&self, cx: &AppContext) -> bool;
24 fn is_focused(&self, cx: &AppContext) -> bool;
25 fn to_any(&self) -> AnyViewHandle;
26}
27
28impl<T> SidebarItemHandle for ViewHandle<T>
29where
30 T: SidebarItem,
31{
32 fn id(&self) -> usize {
33 self.id()
34 }
35
36 fn should_show_badge(&self, cx: &AppContext) -> bool {
37 self.read(cx).should_show_badge(cx)
38 }
39
40 fn is_focused(&self, cx: &AppContext) -> bool {
41 ViewHandle::is_focused(&self, cx) || self.read(cx).contains_focused_view(cx)
42 }
43
44 fn to_any(&self) -> AnyViewHandle {
45 self.into()
46 }
47}
48
49impl Into<AnyViewHandle> for &dyn SidebarItemHandle {
50 fn into(self) -> AnyViewHandle {
51 self.to_any()
52 }
53}
54
55pub struct Sidebar {
56 side: Side,
57 items: Vec<Item>,
58 is_open: bool,
59 active_item_ix: usize,
60 actual_width: Rc<RefCell<f32>>,
61 custom_width: Rc<RefCell<f32>>,
62}
63
64#[derive(Clone, Copy, Debug, Deserialize, PartialEq)]
65pub enum Side {
66 Left,
67 Right,
68}
69
70struct Item {
71 icon_path: &'static str,
72 tooltip: String,
73 view: Rc<dyn SidebarItemHandle>,
74 _subscriptions: [Subscription; 2],
75}
76
77pub struct SidebarButtons {
78 sidebar: ViewHandle<Sidebar>,
79}
80
81#[derive(Clone, Debug, Deserialize, PartialEq)]
82pub struct ToggleSidebarItem {
83 pub side: Side,
84 pub item_index: usize,
85}
86
87impl_actions!(workspace, [ToggleSidebarItem]);
88
89impl Sidebar {
90 pub fn new(side: Side) -> Self {
91 Self {
92 side,
93 items: Default::default(),
94 active_item_ix: 0,
95 is_open: false,
96 actual_width: Rc::new(RefCell::new(260.)),
97 custom_width: Rc::new(RefCell::new(260.)),
98 }
99 }
100
101 pub fn is_open(&self) -> bool {
102 self.is_open
103 }
104
105 pub fn active_item_ix(&self) -> usize {
106 self.active_item_ix
107 }
108
109 pub fn set_open(&mut self, open: bool, cx: &mut ViewContext<Self>) {
110 if open != self.is_open {
111 self.is_open = open;
112 cx.notify();
113 }
114 }
115
116 pub fn toggle_open(&mut self, cx: &mut ViewContext<Self>) {
117 if self.is_open {}
118 self.is_open = !self.is_open;
119 cx.notify();
120 }
121
122 pub fn add_item<T: SidebarItem>(
123 &mut self,
124 icon_path: &'static str,
125 tooltip: String,
126 view: ViewHandle<T>,
127 cx: &mut ViewContext<Self>,
128 ) {
129 let subscriptions = [
130 cx.observe(&view, |_, _, cx| cx.notify()),
131 cx.subscribe(&view, |this, view, event, cx| {
132 if view.read(cx).should_activate_item_on_event(event, cx) {
133 if let Some(ix) = this
134 .items
135 .iter()
136 .position(|item| item.view.id() == view.id())
137 {
138 this.activate_item(ix, cx);
139 }
140 }
141 }),
142 ];
143 self.items.push(Item {
144 icon_path,
145 tooltip,
146 view: Rc::new(view),
147 _subscriptions: subscriptions,
148 });
149 cx.notify()
150 }
151
152 pub fn activate_item(&mut self, item_ix: usize, cx: &mut ViewContext<Self>) {
153 self.active_item_ix = item_ix;
154 cx.notify();
155 }
156
157 pub fn toggle_item(&mut self, item_ix: usize, cx: &mut ViewContext<Self>) {
158 if self.active_item_ix == item_ix {
159 self.is_open = false;
160 } else {
161 self.active_item_ix = item_ix;
162 }
163 cx.notify();
164 }
165
166 pub fn active_item(&self) -> Option<&Rc<dyn SidebarItemHandle>> {
167 if self.is_open {
168 self.items.get(self.active_item_ix).map(|item| &item.view)
169 } else {
170 None
171 }
172 }
173
174 fn render_resize_handle(&self, theme: &Theme, cx: &mut RenderContext<Self>) -> ElementBox {
175 let actual_width = self.actual_width.clone();
176 let custom_width = self.custom_width.clone();
177 let side = self.side;
178 MouseEventHandler::new::<Self, _, _>(side as usize, cx, |_, _| {
179 Empty::new()
180 .contained()
181 .with_style(theme.workspace.sidebar_resize_handle)
182 .boxed()
183 })
184 .with_padding(Padding {
185 left: 4.,
186 right: 4.,
187 ..Default::default()
188 })
189 .with_cursor_style(CursorStyle::ResizeLeftRight)
190 .on_mouse_down(MouseButton::Left, |_, _| {}) // This prevents the mouse down event from being propagated elsewhere
191 .on_drag(
192 MouseButton::Left,
193 move |old_position,
194 MouseMovedEvent {
195 position: new_position,
196 ..
197 },
198 cx| {
199 let delta = new_position.x() - old_position.x();
200 let prev_width = *actual_width.borrow();
201 *custom_width.borrow_mut() = 0f32
202 .max(match side {
203 Side::Left => prev_width + delta,
204 Side::Right => prev_width - delta,
205 })
206 .round();
207
208 cx.notify();
209 },
210 )
211 .boxed()
212 }
213}
214
215impl Entity for Sidebar {
216 type Event = ();
217}
218
219impl View for Sidebar {
220 fn ui_name() -> &'static str {
221 "Sidebar"
222 }
223
224 fn render(&mut self, cx: &mut RenderContext<Self>) -> ElementBox {
225 let theme = cx.global::<Settings>().theme.clone();
226 if let Some(active_item) = self.active_item() {
227 let mut container = Flex::row();
228 if matches!(self.side, Side::Right) {
229 container.add_child(self.render_resize_handle(&theme, cx));
230 }
231
232 container.add_child(
233 Hook::new(
234 ChildView::new(active_item.to_any())
235 .constrained()
236 .with_max_width(*self.custom_width.borrow())
237 .boxed(),
238 )
239 .on_after_layout({
240 let actual_width = self.actual_width.clone();
241 move |size, _| *actual_width.borrow_mut() = size.x()
242 })
243 .flex(1., false)
244 .boxed(),
245 );
246 if matches!(self.side, Side::Left) {
247 container.add_child(self.render_resize_handle(&theme, cx));
248 }
249 container.boxed()
250 } else {
251 Empty::new().boxed()
252 }
253 }
254}
255
256impl SidebarButtons {
257 pub fn new(sidebar: ViewHandle<Sidebar>, cx: &mut ViewContext<Self>) -> Self {
258 cx.observe(&sidebar, |_, _, cx| cx.notify()).detach();
259 Self { sidebar }
260 }
261}
262
263impl Entity for SidebarButtons {
264 type Event = ();
265}
266
267impl View for SidebarButtons {
268 fn ui_name() -> &'static str {
269 "SidebarToggleButton"
270 }
271
272 fn render(&mut self, cx: &mut RenderContext<Self>) -> ElementBox {
273 let theme = &cx.global::<Settings>().theme;
274 let tooltip_style = theme.tooltip.clone();
275 let theme = &theme.workspace.status_bar.sidebar_buttons;
276 let sidebar = self.sidebar.read(cx);
277 let item_style = theme.item;
278 let badge_style = theme.badge;
279 let active_ix = sidebar.active_item_ix;
280 let is_open = sidebar.is_open;
281 let side = sidebar.side;
282 let group_style = match side {
283 Side::Left => theme.group_left,
284 Side::Right => theme.group_right,
285 };
286 let items = sidebar
287 .items
288 .iter()
289 .map(|item| (item.icon_path, item.tooltip.clone(), item.view.clone()))
290 .collect::<Vec<_>>();
291 Flex::row()
292 .with_children(items.into_iter().enumerate().map(
293 |(ix, (icon_path, tooltip, item_view))| {
294 let action = ToggleSidebarItem {
295 side,
296 item_index: ix,
297 };
298 MouseEventHandler::new::<Self, _, _>(ix, cx, move |state, cx| {
299 let is_active = is_open && ix == active_ix;
300 let style = item_style.style_for(state, is_active);
301 Stack::new()
302 .with_child(Svg::new(icon_path).with_color(style.icon_color).boxed())
303 .with_children(if !is_active && item_view.should_show_badge(cx) {
304 Some(
305 Empty::new()
306 .collapsed()
307 .contained()
308 .with_style(badge_style)
309 .aligned()
310 .bottom()
311 .right()
312 .boxed(),
313 )
314 } else {
315 None
316 })
317 .constrained()
318 .with_width(style.icon_size)
319 .with_height(style.icon_size)
320 .contained()
321 .with_style(style.container)
322 .boxed()
323 })
324 .with_cursor_style(CursorStyle::PointingHand)
325 .on_click(MouseButton::Left, {
326 let action = action.clone();
327 move |_, cx| cx.dispatch_action(action.clone())
328 })
329 .with_tooltip::<Self, _>(
330 ix,
331 tooltip,
332 Some(Box::new(action)),
333 tooltip_style.clone(),
334 cx,
335 )
336 .boxed()
337 },
338 ))
339 .contained()
340 .with_style(group_style)
341 .boxed()
342 }
343}
344
345impl StatusItemView for SidebarButtons {
346 fn set_active_pane_item(
347 &mut self,
348 _: Option<&dyn crate::ItemHandle>,
349 _: &mut ViewContext<Self>,
350 ) {
351 }
352}