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 .border_b()
107 .border_color(cx.theme().colors().border_variant)
108 .bg(cx.theme().colors().toolbar_background)
109 .child(
110 h_stack()
111 .when(self.left_items().count() > 0, |this| {
112 this.child(
113 h_stack()
114 .flex_1()
115 .justify_start()
116 .children(self.left_items().map(|item| item.to_any())),
117 )
118 })
119 // Render an empty div that takes up the space between
120 // the left and right sides. This won't cause items to
121 // be centered like justify_center() will if left or
122 // right is missing.
123 .child(div().flex_1())
124 .when(self.right_items().count() > 0, |this| {
125 this.child(
126 h_stack()
127 .flex_1()
128 .justify_end()
129 .children(self.right_items().map(|item| item.to_any())),
130 )
131 }),
132 )
133 .children(secondary_item)
134 }
135}
136
137// todo!()
138// impl View for Toolbar {
139// fn ui_name() -> &'static str {
140// "Toolbar"
141// }
142
143// fn render(&mut self, cx: &mut ViewContext<Self>) -> AnyElement<Self> {
144// let theme = &theme::current(cx).workspace.toolbar;
145
146// let mut primary_left_items = Vec::new();
147// let mut primary_right_items = Vec::new();
148// let mut secondary_item = None;
149// let spacing = theme.item_spacing;
150// let mut primary_items_row_count = 1;
151
152// for (item, position) in &self.items {
153// match *position {
154// ToolbarItemLocation::Hidden => {}
155
156// ToolbarItemLocation::PrimaryLeft { flex } => {
157// primary_items_row_count = primary_items_row_count.max(item.row_count(cx));
158// let left_item = ChildView::new(item.as_any(), cx).aligned();
159// if let Some((flex, expanded)) = flex {
160// primary_left_items.push(left_item.flex(flex, expanded).into_any());
161// } else {
162// primary_left_items.push(left_item.into_any());
163// }
164// }
165
166// ToolbarItemLocation::PrimaryRight { flex } => {
167// primary_items_row_count = primary_items_row_count.max(item.row_count(cx));
168// let right_item = ChildView::new(item.as_any(), cx).aligned().flex_float();
169// if let Some((flex, expanded)) = flex {
170// primary_right_items.push(right_item.flex(flex, expanded).into_any());
171// } else {
172// primary_right_items.push(right_item.into_any());
173// }
174// }
175
176// ToolbarItemLocation::Secondary => {
177// secondary_item = Some(
178// ChildView::new(item.as_any(), cx)
179// .constrained()
180// .with_height(theme.height * item.row_count(cx) as f32)
181// .into_any(),
182// );
183// }
184// }
185// }
186
187// let container_style = theme.container;
188// let height = theme.height * primary_items_row_count as f32;
189
190// let mut primary_items = Flex::row().with_spacing(spacing);
191// primary_items.extend(primary_left_items);
192// primary_items.extend(primary_right_items);
193
194// let mut toolbar = Flex::column();
195// if !primary_items.is_empty() {
196// toolbar.add_child(primary_items.constrained().with_height(height));
197// }
198// if let Some(secondary_item) = secondary_item {
199// toolbar.add_child(secondary_item);
200// }
201
202// if toolbar.is_empty() {
203// toolbar.into_any_named("toolbar")
204// } else {
205// toolbar
206// .contained()
207// .with_style(container_style)
208// .into_any_named("toolbar")
209// }
210// }
211// }
212
213impl Toolbar {
214 pub fn new() -> Self {
215 Self {
216 active_item: None,
217 items: Default::default(),
218 hidden: false,
219 can_navigate: true,
220 }
221 }
222
223 pub fn set_can_navigate(&mut self, can_navigate: bool, cx: &mut ViewContext<Self>) {
224 self.can_navigate = can_navigate;
225 cx.notify();
226 }
227
228 pub fn add_item<T>(&mut self, item: View<T>, cx: &mut ViewContext<Self>)
229 where
230 T: 'static + ToolbarItemView,
231 {
232 let location = item.set_active_pane_item(self.active_item.as_deref(), cx);
233 cx.subscribe(&item, |this, item, event, cx| {
234 if let Some((_, current_location)) =
235 this.items.iter_mut().find(|(i, _)| i.id() == item.id())
236 {
237 match event {
238 ToolbarItemEvent::ChangeLocation(new_location) => {
239 if new_location != current_location {
240 *current_location = *new_location;
241 cx.notify();
242 }
243 }
244 }
245 }
246 })
247 .detach();
248 self.items.push((Box::new(item), location));
249 cx.notify();
250 }
251
252 pub fn set_active_item(&mut self, item: Option<&dyn ItemHandle>, cx: &mut ViewContext<Self>) {
253 self.active_item = item.map(|item| item.boxed_clone());
254 self.hidden = self
255 .active_item
256 .as_ref()
257 .map(|item| !item.show_toolbar(cx))
258 .unwrap_or(false);
259
260 for (toolbar_item, current_location) in self.items.iter_mut() {
261 let new_location = toolbar_item.set_active_pane_item(item, cx);
262 if new_location != *current_location {
263 *current_location = new_location;
264 cx.notify();
265 }
266 }
267 }
268
269 pub fn focus_changed(&mut self, focused: bool, cx: &mut ViewContext<Self>) {
270 for (toolbar_item, _) in self.items.iter_mut() {
271 toolbar_item.focus_changed(focused, cx);
272 }
273 }
274
275 pub fn item_of_type<T: ToolbarItemView>(&self) -> Option<View<T>> {
276 self.items
277 .iter()
278 .find_map(|(item, _)| item.to_any().downcast().ok())
279 }
280
281 pub fn hidden(&self) -> bool {
282 self.hidden
283 }
284}
285
286impl<T: ToolbarItemView> ToolbarItemViewHandle for View<T> {
287 fn id(&self) -> EntityId {
288 self.entity_id()
289 }
290
291 fn to_any(&self) -> AnyView {
292 self.clone().into()
293 }
294
295 fn set_active_pane_item(
296 &self,
297 active_pane_item: Option<&dyn ItemHandle>,
298 cx: &mut WindowContext,
299 ) -> ToolbarItemLocation {
300 self.update(cx, |this, cx| {
301 this.set_active_pane_item(active_pane_item, cx)
302 })
303 }
304
305 fn focus_changed(&mut self, pane_focused: bool, cx: &mut WindowContext) {
306 self.update(cx, |this, cx| {
307 this.pane_focus_update(pane_focused, cx);
308 cx.notify();
309 });
310 }
311
312 fn row_count(&self, cx: &WindowContext) -> usize {
313 self.read(cx).row_count(cx)
314 }
315}
316
317// todo!()
318// impl From<&dyn ToolbarItemViewHandle> for AnyViewHandle {
319// fn from(val: &dyn ToolbarItemViewHandle) -> Self {
320// val.as_any().clone()
321// }
322// }