1use crate::StatusItemView;
2use gpui::{
3 elements::*, impl_actions, platform::CursorStyle, AnyViewHandle, AppContext, Entity,
4 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(|_, _| {}) // This prevents the mouse down event from being propagated elsewhere
191 .on_drag(move |delta, cx| {
192 let prev_width = *actual_width.borrow();
193 *custom_width.borrow_mut() = 0f32
194 .max(match side {
195 Side::Left => prev_width + delta.x(),
196 Side::Right => prev_width - delta.x(),
197 })
198 .round();
199
200 cx.notify();
201 })
202 .boxed()
203 }
204}
205
206impl Entity for Sidebar {
207 type Event = ();
208}
209
210impl View for Sidebar {
211 fn ui_name() -> &'static str {
212 "Sidebar"
213 }
214
215 fn render(&mut self, cx: &mut RenderContext<Self>) -> ElementBox {
216 let theme = cx.global::<Settings>().theme.clone();
217 if let Some(active_item) = self.active_item() {
218 let mut container = Flex::row();
219 if matches!(self.side, Side::Right) {
220 container.add_child(self.render_resize_handle(&theme, cx));
221 }
222
223 container.add_child(
224 Hook::new(
225 ChildView::new(active_item.to_any())
226 .constrained()
227 .with_max_width(*self.custom_width.borrow())
228 .boxed(),
229 )
230 .on_after_layout({
231 let actual_width = self.actual_width.clone();
232 move |size, _| *actual_width.borrow_mut() = size.x()
233 })
234 .flex(1., false)
235 .boxed(),
236 );
237 if matches!(self.side, Side::Left) {
238 container.add_child(self.render_resize_handle(&theme, cx));
239 }
240 container.boxed()
241 } else {
242 Empty::new().boxed()
243 }
244 }
245}
246
247impl SidebarButtons {
248 pub fn new(sidebar: ViewHandle<Sidebar>, cx: &mut ViewContext<Self>) -> Self {
249 cx.observe(&sidebar, |_, _, cx| cx.notify()).detach();
250 Self { sidebar }
251 }
252}
253
254impl Entity for SidebarButtons {
255 type Event = ();
256}
257
258impl View for SidebarButtons {
259 fn ui_name() -> &'static str {
260 "SidebarToggleButton"
261 }
262
263 fn render(&mut self, cx: &mut RenderContext<Self>) -> ElementBox {
264 let theme = &cx.global::<Settings>().theme;
265 let tooltip_style = theme.tooltip.clone();
266 let theme = &theme.workspace.status_bar.sidebar_buttons;
267 let sidebar = self.sidebar.read(cx);
268 let item_style = theme.item;
269 let badge_style = theme.badge;
270 let active_ix = sidebar.active_item_ix;
271 let is_open = sidebar.is_open;
272 let side = sidebar.side;
273 let group_style = match side {
274 Side::Left => theme.group_left,
275 Side::Right => theme.group_right,
276 };
277 let items = sidebar
278 .items
279 .iter()
280 .map(|item| (item.icon_path, item.tooltip.clone(), item.view.clone()))
281 .collect::<Vec<_>>();
282 Flex::row()
283 .with_children(items.into_iter().enumerate().map(
284 |(ix, (icon_path, tooltip, item_view))| {
285 let action = ToggleSidebarItem {
286 side,
287 item_index: ix,
288 };
289 MouseEventHandler::new::<Self, _, _>(ix, cx, move |state, cx| {
290 let is_active = is_open && ix == active_ix;
291 let style = item_style.style_for(state, is_active);
292 Stack::new()
293 .with_child(Svg::new(icon_path).with_color(style.icon_color).boxed())
294 .with_children(if !is_active && item_view.should_show_badge(cx) {
295 Some(
296 Empty::new()
297 .collapsed()
298 .contained()
299 .with_style(badge_style)
300 .aligned()
301 .bottom()
302 .right()
303 .boxed(),
304 )
305 } else {
306 None
307 })
308 .constrained()
309 .with_width(style.icon_size)
310 .with_height(style.icon_size)
311 .contained()
312 .with_style(style.container)
313 .boxed()
314 })
315 .with_cursor_style(CursorStyle::PointingHand)
316 .on_click({
317 let action = action.clone();
318 move |_, _, cx| cx.dispatch_action(action.clone())
319 })
320 .with_tooltip::<Self, _>(
321 ix,
322 tooltip,
323 Some(Box::new(action)),
324 tooltip_style.clone(),
325 cx,
326 )
327 .boxed()
328 },
329 ))
330 .contained()
331 .with_style(group_style)
332 .boxed()
333 }
334}
335
336impl StatusItemView for SidebarButtons {
337 fn set_active_pane_item(
338 &mut self,
339 _: Option<&dyn crate::ItemHandle>,
340 _: &mut ViewContext<Self>,
341 ) {
342 }
343}