1use crate::ItemHandle;
2use gpui::{
3 AnyView, Div, Entity, EntityId, EventEmitter, ParentElement as _, Render, Styled, View,
4 ViewContext, 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 type Element = Div;
97
98 fn render(&mut self, cx: &mut ViewContext<Self>) -> Self::Element {
99 if !self.has_any_visible_items() {
100 return div();
101 }
102
103 let secondary_item = self.secondary_items().next().map(|item| item.to_any());
104
105 v_stack()
106 .p_1()
107 .gap_2()
108 .border_b()
109 .border_color(cx.theme().colors().border_variant)
110 .bg(cx.theme().colors().toolbar_background)
111 .child(
112 h_stack()
113 .justify_between()
114 .when(self.left_items().count() > 0, |this| {
115 this.child(
116 h_stack()
117 .flex_1()
118 .justify_start()
119 .children(self.left_items().map(|item| item.to_any())),
120 )
121 })
122 .when(self.right_items().count() > 0, |this| {
123 this.child(
124 h_stack()
125 .flex_1()
126 .justify_end()
127 .children(self.right_items().map(|item| item.to_any())),
128 )
129 }),
130 )
131 .children(secondary_item)
132 }
133}
134
135// todo!()
136// impl View for Toolbar {
137// fn ui_name() -> &'static str {
138// "Toolbar"
139// }
140
141// fn render(&mut self, cx: &mut ViewContext<Self>) -> AnyElement<Self> {
142// let theme = &theme::current(cx).workspace.toolbar;
143
144// let mut primary_left_items = Vec::new();
145// let mut primary_right_items = Vec::new();
146// let mut secondary_item = None;
147// let spacing = theme.item_spacing;
148// let mut primary_items_row_count = 1;
149
150// for (item, position) in &self.items {
151// match *position {
152// ToolbarItemLocation::Hidden => {}
153
154// ToolbarItemLocation::PrimaryLeft { flex } => {
155// primary_items_row_count = primary_items_row_count.max(item.row_count(cx));
156// let left_item = ChildView::new(item.as_any(), cx).aligned();
157// if let Some((flex, expanded)) = flex {
158// primary_left_items.push(left_item.flex(flex, expanded).into_any());
159// } else {
160// primary_left_items.push(left_item.into_any());
161// }
162// }
163
164// ToolbarItemLocation::PrimaryRight { flex } => {
165// primary_items_row_count = primary_items_row_count.max(item.row_count(cx));
166// let right_item = ChildView::new(item.as_any(), cx).aligned().flex_float();
167// if let Some((flex, expanded)) = flex {
168// primary_right_items.push(right_item.flex(flex, expanded).into_any());
169// } else {
170// primary_right_items.push(right_item.into_any());
171// }
172// }
173
174// ToolbarItemLocation::Secondary => {
175// secondary_item = Some(
176// ChildView::new(item.as_any(), cx)
177// .constrained()
178// .with_height(theme.height * item.row_count(cx) as f32)
179// .into_any(),
180// );
181// }
182// }
183// }
184
185// let container_style = theme.container;
186// let height = theme.height * primary_items_row_count as f32;
187
188// let mut primary_items = Flex::row().with_spacing(spacing);
189// primary_items.extend(primary_left_items);
190// primary_items.extend(primary_right_items);
191
192// let mut toolbar = Flex::column();
193// if !primary_items.is_empty() {
194// toolbar.add_child(primary_items.constrained().with_height(height));
195// }
196// if let Some(secondary_item) = secondary_item {
197// toolbar.add_child(secondary_item);
198// }
199
200// if toolbar.is_empty() {
201// toolbar.into_any_named("toolbar")
202// } else {
203// toolbar
204// .contained()
205// .with_style(container_style)
206// .into_any_named("toolbar")
207// }
208// }
209// }
210
211impl Toolbar {
212 pub fn new() -> Self {
213 Self {
214 active_item: None,
215 items: Default::default(),
216 hidden: false,
217 can_navigate: true,
218 }
219 }
220
221 pub fn set_can_navigate(&mut self, can_navigate: bool, cx: &mut ViewContext<Self>) {
222 self.can_navigate = can_navigate;
223 cx.notify();
224 }
225
226 pub fn add_item<T>(&mut self, item: View<T>, cx: &mut ViewContext<Self>)
227 where
228 T: 'static + ToolbarItemView,
229 {
230 let location = item.set_active_pane_item(self.active_item.as_deref(), cx);
231 cx.subscribe(&item, |this, item, event, cx| {
232 if let Some((_, current_location)) =
233 this.items.iter_mut().find(|(i, _)| i.id() == item.id())
234 {
235 match event {
236 ToolbarItemEvent::ChangeLocation(new_location) => {
237 if new_location != current_location {
238 *current_location = *new_location;
239 cx.notify();
240 }
241 }
242 }
243 }
244 })
245 .detach();
246 self.items.push((Box::new(item), location));
247 cx.notify();
248 }
249
250 pub fn set_active_item(&mut self, item: Option<&dyn ItemHandle>, cx: &mut ViewContext<Self>) {
251 self.active_item = item.map(|item| item.boxed_clone());
252 self.hidden = self
253 .active_item
254 .as_ref()
255 .map(|item| !item.show_toolbar(cx))
256 .unwrap_or(false);
257
258 for (toolbar_item, current_location) in self.items.iter_mut() {
259 let new_location = toolbar_item.set_active_pane_item(item, cx);
260 if new_location != *current_location {
261 *current_location = new_location;
262 cx.notify();
263 }
264 }
265 }
266
267 pub fn focus_changed(&mut self, focused: bool, cx: &mut ViewContext<Self>) {
268 for (toolbar_item, _) in self.items.iter_mut() {
269 toolbar_item.focus_changed(focused, cx);
270 }
271 }
272
273 pub fn item_of_type<T: ToolbarItemView>(&self) -> Option<View<T>> {
274 self.items
275 .iter()
276 .find_map(|(item, _)| item.to_any().downcast().ok())
277 }
278
279 pub fn hidden(&self) -> bool {
280 self.hidden
281 }
282}
283
284impl<T: ToolbarItemView> ToolbarItemViewHandle for View<T> {
285 fn id(&self) -> EntityId {
286 self.entity_id()
287 }
288
289 fn to_any(&self) -> AnyView {
290 self.clone().into()
291 }
292
293 fn set_active_pane_item(
294 &self,
295 active_pane_item: Option<&dyn ItemHandle>,
296 cx: &mut WindowContext,
297 ) -> ToolbarItemLocation {
298 self.update(cx, |this, cx| {
299 this.set_active_pane_item(active_pane_item, cx)
300 })
301 }
302
303 fn focus_changed(&mut self, pane_focused: bool, cx: &mut WindowContext) {
304 self.update(cx, |this, cx| {
305 this.pane_focus_update(pane_focused, cx);
306 cx.notify();
307 });
308 }
309
310 fn row_count(&self, cx: &WindowContext) -> usize {
311 self.read(cx).row_count(cx)
312 }
313}
314
315// todo!()
316// impl From<&dyn ToolbarItemViewHandle> for AnyViewHandle {
317// fn from(val: &dyn ToolbarItemViewHandle) -> Self {
318// val.as_any().clone()
319// }
320// }