1use crate::{ItemHandle, Pane};
2use gpui::{
3 elements::*, platform::CursorStyle, Action, AnyViewHandle, AppContext, ElementBox, Entity,
4 MouseButton, MutableAppContext, RenderContext, View, ViewContext, ViewHandle, WeakViewHandle,
5};
6use settings::Settings;
7
8pub trait ToolbarItemView: View {
9 fn set_active_pane_item(
10 &mut self,
11 active_pane_item: Option<&dyn crate::ItemHandle>,
12 cx: &mut ViewContext<Self>,
13 ) -> ToolbarItemLocation;
14
15 fn location_for_event(
16 &self,
17 _event: &Self::Event,
18 current_location: ToolbarItemLocation,
19 _cx: &AppContext,
20 ) -> ToolbarItemLocation {
21 current_location
22 }
23}
24
25trait ToolbarItemViewHandle {
26 fn id(&self) -> usize;
27 fn to_any(&self) -> AnyViewHandle;
28 fn set_active_pane_item(
29 &self,
30 active_pane_item: Option<&dyn ItemHandle>,
31 cx: &mut MutableAppContext,
32 ) -> ToolbarItemLocation;
33}
34
35#[derive(Copy, Clone, Debug, PartialEq)]
36pub enum ToolbarItemLocation {
37 Hidden,
38 PrimaryLeft { flex: Option<(f32, bool)> },
39 PrimaryRight { flex: Option<(f32, bool)> },
40 Secondary,
41}
42
43pub struct Toolbar {
44 active_pane_item: Option<Box<dyn ItemHandle>>,
45 pane: WeakViewHandle<Pane>,
46 items: Vec<(Box<dyn ToolbarItemViewHandle>, ToolbarItemLocation)>,
47}
48
49impl Entity for Toolbar {
50 type Event = ();
51}
52
53impl View for Toolbar {
54 fn ui_name() -> &'static str {
55 "Toolbar"
56 }
57
58 fn render(&mut self, cx: &mut RenderContext<Self>) -> ElementBox {
59 let theme = &cx.global::<Settings>().theme.workspace.toolbar;
60
61 let mut primary_left_items = Vec::new();
62 let mut primary_right_items = Vec::new();
63 let mut secondary_item = None;
64 let spacing = theme.item_spacing;
65
66 for (item, position) in &self.items {
67 match *position {
68 ToolbarItemLocation::Hidden => {}
69 ToolbarItemLocation::PrimaryLeft { flex } => {
70 let left_item = ChildView::new(item.as_ref())
71 .aligned()
72 .contained()
73 .with_margin_right(spacing);
74 if let Some((flex, expanded)) = flex {
75 primary_left_items.push(left_item.flex(flex, expanded).boxed());
76 } else {
77 primary_left_items.push(left_item.boxed());
78 }
79 }
80 ToolbarItemLocation::PrimaryRight { flex } => {
81 let right_item = ChildView::new(item.as_ref())
82 .aligned()
83 .contained()
84 .with_margin_left(spacing)
85 .flex_float();
86 if let Some((flex, expanded)) = flex {
87 primary_right_items.push(right_item.flex(flex, expanded).boxed());
88 } else {
89 primary_right_items.push(right_item.boxed());
90 }
91 }
92 ToolbarItemLocation::Secondary => {
93 secondary_item = Some(
94 ChildView::new(item.as_ref())
95 .constrained()
96 .with_height(theme.height)
97 .boxed(),
98 );
99 }
100 }
101 }
102
103 let pane = self.pane.clone();
104 let mut enable_go_backward = false;
105 let mut enable_go_forward = false;
106 if let Some(pane) = pane.upgrade(cx) {
107 let pane = pane.read(cx);
108 enable_go_backward = pane.can_navigate_backward();
109 enable_go_forward = pane.can_navigate_forward();
110 }
111
112 let container_style = theme.container;
113 let height = theme.height;
114 let button_style = theme.nav_button;
115 let tooltip_style = cx.global::<Settings>().theme.tooltip.clone();
116
117 Flex::column()
118 .with_child(
119 Flex::row()
120 .with_child(nav_button(
121 "icons/arrow_left_16.svg",
122 button_style,
123 tooltip_style.clone(),
124 enable_go_backward,
125 spacing,
126 super::GoBack {
127 pane: Some(pane.clone()),
128 },
129 super::GoBack { pane: None },
130 "Go Back",
131 cx,
132 ))
133 .with_child(nav_button(
134 "icons/arrow_right_16.svg",
135 button_style,
136 tooltip_style.clone(),
137 enable_go_forward,
138 spacing,
139 super::GoForward {
140 pane: Some(pane.clone()),
141 },
142 super::GoForward { pane: None },
143 "Go Forward",
144 cx,
145 ))
146 .with_children(primary_left_items)
147 .with_children(primary_right_items)
148 .constrained()
149 .with_height(height)
150 .boxed(),
151 )
152 .with_children(secondary_item)
153 .contained()
154 .with_style(container_style)
155 .boxed()
156 }
157}
158
159fn nav_button<A: Action + Clone>(
160 svg_path: &'static str,
161 style: theme::Interactive<theme::IconButton>,
162 tooltip_style: TooltipStyle,
163 enabled: bool,
164 spacing: f32,
165 action: A,
166 tooltip_action: A,
167 action_name: &str,
168 cx: &mut RenderContext<Toolbar>,
169) -> ElementBox {
170 MouseEventHandler::new::<A, _, _>(0, cx, |state, _| {
171 let style = if enabled {
172 style.style_for(state, false)
173 } else {
174 style.disabled_style()
175 };
176 Svg::new(svg_path)
177 .with_color(style.color)
178 .constrained()
179 .with_width(style.icon_width)
180 .aligned()
181 .contained()
182 .with_style(style.container)
183 .constrained()
184 .with_width(style.button_width)
185 .with_height(style.button_width)
186 .aligned()
187 .boxed()
188 })
189 .with_cursor_style(if enabled {
190 CursorStyle::PointingHand
191 } else {
192 CursorStyle::default()
193 })
194 .on_click(MouseButton::Left, move |_, cx| {
195 cx.dispatch_action(action.clone())
196 })
197 .with_tooltip::<A, _>(
198 0,
199 action_name.to_string(),
200 Some(Box::new(tooltip_action)),
201 tooltip_style,
202 cx,
203 )
204 .contained()
205 .with_margin_right(spacing)
206 .boxed()
207}
208
209impl Toolbar {
210 pub fn new(pane: WeakViewHandle<Pane>) -> Self {
211 Self {
212 active_pane_item: None,
213 pane,
214 items: Default::default(),
215 }
216 }
217
218 pub fn add_item<T>(&mut self, item: ViewHandle<T>, cx: &mut ViewContext<Self>)
219 where
220 T: 'static + ToolbarItemView,
221 {
222 let location = item.set_active_pane_item(self.active_pane_item.as_deref(), cx);
223 cx.subscribe(&item, |this, item, event, cx| {
224 if let Some((_, current_location)) =
225 this.items.iter_mut().find(|(i, _)| i.id() == item.id())
226 {
227 let new_location = item
228 .read(cx)
229 .location_for_event(event, *current_location, cx);
230 if new_location != *current_location {
231 *current_location = new_location;
232 cx.notify();
233 }
234 }
235 })
236 .detach();
237 self.items.push((Box::new(item), location));
238 cx.notify();
239 }
240
241 pub fn set_active_pane_item(
242 &mut self,
243 pane_item: Option<&dyn ItemHandle>,
244 cx: &mut ViewContext<Self>,
245 ) {
246 self.active_pane_item = pane_item.map(|item| item.boxed_clone());
247 for (toolbar_item, current_location) in self.items.iter_mut() {
248 let new_location = toolbar_item.set_active_pane_item(pane_item, cx);
249 if new_location != *current_location {
250 *current_location = new_location;
251 cx.notify();
252 }
253 }
254 }
255
256 pub fn item_of_type<T: ToolbarItemView>(&self) -> Option<ViewHandle<T>> {
257 self.items
258 .iter()
259 .find_map(|(item, _)| item.to_any().downcast())
260 }
261}
262
263impl<T: ToolbarItemView> ToolbarItemViewHandle for ViewHandle<T> {
264 fn id(&self) -> usize {
265 self.id()
266 }
267
268 fn to_any(&self) -> AnyViewHandle {
269 self.into()
270 }
271
272 fn set_active_pane_item(
273 &self,
274 active_pane_item: Option<&dyn ItemHandle>,
275 cx: &mut MutableAppContext,
276 ) -> ToolbarItemLocation {
277 self.update(cx, |this, cx| {
278 this.set_active_pane_item(active_pane_item, cx)
279 })
280 }
281}
282
283impl Into<AnyViewHandle> for &dyn ToolbarItemViewHandle {
284 fn into(self) -> AnyViewHandle {
285 self.to_any()
286 }
287}