1use crate::ItemHandle;
2use gpui::{
3 AnyView, Entity, EntityId, EventEmitter, ParentElement as _, Render, Styled, View, ViewContext,
4 WindowContext,
5};
6use ui::prelude::*;
7use ui::{h_stack, v_stack};
8
9pub enum ToolbarItemEvent {
10 ChangeLocation(ToolbarItemLocation),
11}
12
13pub trait ToolbarItemView: Render + EventEmitter<ToolbarItemEvent> {
14 fn set_active_pane_item(
15 &mut self,
16 active_pane_item: Option<&dyn crate::ItemHandle>,
17 cx: &mut ViewContext<Self>,
18 ) -> ToolbarItemLocation;
19
20 fn pane_focus_update(&mut self, _pane_focused: bool, _cx: &mut ViewContext<Self>) {}
21
22 /// Number of times toolbar's height will be repeated to get the effective height.
23 /// Useful when multiple rows one under each other are needed.
24 /// The rows have the same width and act as a whole when reacting to resizes and similar events.
25 fn row_count(&self, _cx: &WindowContext) -> usize {
26 1
27 }
28}
29
30trait ToolbarItemViewHandle: Send {
31 fn id(&self) -> EntityId;
32 fn to_any(&self) -> AnyView;
33 fn set_active_pane_item(
34 &self,
35 active_pane_item: Option<&dyn ItemHandle>,
36 cx: &mut WindowContext,
37 ) -> ToolbarItemLocation;
38 fn focus_changed(&mut self, pane_focused: bool, cx: &mut WindowContext);
39 fn row_count(&self, cx: &WindowContext) -> usize;
40}
41
42#[derive(Copy, Clone, Debug, PartialEq)]
43pub enum ToolbarItemLocation {
44 Hidden,
45 PrimaryLeft,
46 PrimaryRight,
47 Secondary,
48}
49
50pub struct Toolbar {
51 active_item: Option<Box<dyn ItemHandle>>,
52 hidden: bool,
53 can_navigate: bool,
54 items: Vec<(Box<dyn ToolbarItemViewHandle>, ToolbarItemLocation)>,
55}
56
57impl Toolbar {
58 fn has_any_visible_items(&self) -> bool {
59 self.items
60 .iter()
61 .any(|(_item, location)| *location != ToolbarItemLocation::Hidden)
62 }
63
64 fn left_items(&self) -> impl Iterator<Item = &dyn ToolbarItemViewHandle> {
65 self.items.iter().filter_map(|(item, location)| {
66 if *location == ToolbarItemLocation::PrimaryLeft {
67 Some(item.as_ref())
68 } else {
69 None
70 }
71 })
72 }
73
74 fn right_items(&self) -> impl Iterator<Item = &dyn ToolbarItemViewHandle> {
75 self.items.iter().filter_map(|(item, location)| {
76 if *location == ToolbarItemLocation::PrimaryRight {
77 Some(item.as_ref())
78 } else {
79 None
80 }
81 })
82 }
83
84 fn secondary_items(&self) -> impl Iterator<Item = &dyn ToolbarItemViewHandle> {
85 self.items.iter().filter_map(|(item, location)| {
86 if *location == ToolbarItemLocation::Secondary {
87 Some(item.as_ref())
88 } else {
89 None
90 }
91 })
92 }
93}
94
95impl Render for Toolbar {
96 fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
97 if !self.has_any_visible_items() {
98 return div();
99 }
100
101 let secondary_item = self.secondary_items().next().map(|item| item.to_any());
102
103 let has_left_items = self.left_items().count() > 0;
104 let has_right_items = self.right_items().count() > 0;
105
106 v_stack()
107 .p_2()
108 .when(has_left_items || has_right_items, |this| this.gap_2())
109 .border_b()
110 .border_color(cx.theme().colors().border_variant)
111 .bg(cx.theme().colors().toolbar_background)
112 .child(
113 h_stack()
114 .justify_between()
115 .when(has_left_items, |this| {
116 this.child(
117 h_stack()
118 .flex_1()
119 .justify_start()
120 .children(self.left_items().map(|item| item.to_any())),
121 )
122 })
123 .when(has_right_items, |this| {
124 this.child(
125 h_stack()
126 .flex_1()
127 .justify_end()
128 .children(self.right_items().map(|item| item.to_any())),
129 )
130 }),
131 )
132 .children(secondary_item)
133 }
134}
135
136// todo!()
137// impl View for Toolbar {
138// fn ui_name() -> &'static str {
139// "Toolbar"
140// }
141
142// fn render(&mut self, cx: &mut ViewContext<Self>) -> AnyElement<Self> {
143// let theme = &theme::current(cx).workspace.toolbar;
144
145// let mut primary_left_items = Vec::new();
146// let mut primary_right_items = Vec::new();
147// let mut secondary_item = None;
148// let spacing = theme.item_spacing;
149// let mut primary_items_row_count = 1;
150
151// for (item, position) in &self.items {
152// match *position {
153// ToolbarItemLocation::Hidden => {}
154
155// ToolbarItemLocation::PrimaryLeft { flex } => {
156// primary_items_row_count = primary_items_row_count.max(item.row_count(cx));
157// let left_item = ChildView::new(item.as_any(), cx).aligned();
158// if let Some((flex, expanded)) = flex {
159// primary_left_items.push(left_item.flex(flex, expanded).into_any());
160// } else {
161// primary_left_items.push(left_item.into_any());
162// }
163// }
164
165// ToolbarItemLocation::PrimaryRight { flex } => {
166// primary_items_row_count = primary_items_row_count.max(item.row_count(cx));
167// let right_item = ChildView::new(item.as_any(), cx).aligned().flex_float();
168// if let Some((flex, expanded)) = flex {
169// primary_right_items.push(right_item.flex(flex, expanded).into_any());
170// } else {
171// primary_right_items.push(right_item.into_any());
172// }
173// }
174
175// ToolbarItemLocation::Secondary => {
176// secondary_item = Some(
177// ChildView::new(item.as_any(), cx)
178// .constrained()
179// .with_height(theme.height * item.row_count(cx) as f32)
180// .into_any(),
181// );
182// }
183// }
184// }
185
186// let container_style = theme.container;
187// let height = theme.height * primary_items_row_count as f32;
188
189// let mut primary_items = Flex::row().with_spacing(spacing);
190// primary_items.extend(primary_left_items);
191// primary_items.extend(primary_right_items);
192
193// let mut toolbar = Flex::column();
194// if !primary_items.is_empty() {
195// toolbar.add_child(primary_items.constrained().with_height(height));
196// }
197// if let Some(secondary_item) = secondary_item {
198// toolbar.add_child(secondary_item);
199// }
200
201// if toolbar.is_empty() {
202// toolbar.into_any_named("toolbar")
203// } else {
204// toolbar
205// .contained()
206// .with_style(container_style)
207// .into_any_named("toolbar")
208// }
209// }
210// }
211
212impl Toolbar {
213 pub fn new() -> Self {
214 Self {
215 active_item: None,
216 items: Default::default(),
217 hidden: false,
218 can_navigate: true,
219 }
220 }
221
222 pub fn set_can_navigate(&mut self, can_navigate: bool, cx: &mut ViewContext<Self>) {
223 self.can_navigate = can_navigate;
224 cx.notify();
225 }
226
227 pub fn add_item<T>(&mut self, item: View<T>, cx: &mut ViewContext<Self>)
228 where
229 T: 'static + ToolbarItemView,
230 {
231 let location = item.set_active_pane_item(self.active_item.as_deref(), cx);
232 cx.subscribe(&item, |this, item, event, cx| {
233 if let Some((_, current_location)) =
234 this.items.iter_mut().find(|(i, _)| i.id() == item.id())
235 {
236 match event {
237 ToolbarItemEvent::ChangeLocation(new_location) => {
238 if new_location != current_location {
239 *current_location = *new_location;
240 cx.notify();
241 }
242 }
243 }
244 }
245 })
246 .detach();
247 self.items.push((Box::new(item), location));
248 cx.notify();
249 }
250
251 pub fn set_active_item(&mut self, item: Option<&dyn ItemHandle>, cx: &mut ViewContext<Self>) {
252 self.active_item = item.map(|item| item.boxed_clone());
253 self.hidden = self
254 .active_item
255 .as_ref()
256 .map(|item| !item.show_toolbar(cx))
257 .unwrap_or(false);
258
259 for (toolbar_item, current_location) in self.items.iter_mut() {
260 let new_location = toolbar_item.set_active_pane_item(item, cx);
261 if new_location != *current_location {
262 *current_location = new_location;
263 cx.notify();
264 }
265 }
266 }
267
268 pub fn focus_changed(&mut self, focused: bool, cx: &mut ViewContext<Self>) {
269 for (toolbar_item, _) in self.items.iter_mut() {
270 toolbar_item.focus_changed(focused, cx);
271 }
272 }
273
274 pub fn item_of_type<T: ToolbarItemView>(&self) -> Option<View<T>> {
275 self.items
276 .iter()
277 .find_map(|(item, _)| item.to_any().downcast().ok())
278 }
279
280 pub fn hidden(&self) -> bool {
281 self.hidden
282 }
283}
284
285impl<T: ToolbarItemView> ToolbarItemViewHandle for View<T> {
286 fn id(&self) -> EntityId {
287 self.entity_id()
288 }
289
290 fn to_any(&self) -> AnyView {
291 self.clone().into()
292 }
293
294 fn set_active_pane_item(
295 &self,
296 active_pane_item: Option<&dyn ItemHandle>,
297 cx: &mut WindowContext,
298 ) -> ToolbarItemLocation {
299 self.update(cx, |this, cx| {
300 this.set_active_pane_item(active_pane_item, cx)
301 })
302 }
303
304 fn focus_changed(&mut self, pane_focused: bool, cx: &mut WindowContext) {
305 self.update(cx, |this, cx| {
306 this.pane_focus_update(pane_focused, cx);
307 cx.notify();
308 });
309 }
310
311 fn row_count(&self, cx: &WindowContext) -> usize {
312 self.read(cx).row_count(cx)
313 }
314}
315
316// todo!()
317// impl From<&dyn ToolbarItemViewHandle> for AnyViewHandle {
318// fn from(val: &dyn ToolbarItemViewHandle) -> Self {
319// val.as_any().clone()
320// }
321// }