1use std::sync::Arc;
2
3use gpui::{AnyElement, DismissEvent, SharedString, Task, WeakView};
4use picker::{Picker, PickerDelegate, PickerEditorPosition};
5use ui::{prelude::*, ListItem, ListItemSpacing, PopoverMenu, PopoverTrigger};
6
7use crate::assistant_panel::ContextEditor;
8use crate::SlashCommandWorkingSet;
9
10#[derive(IntoElement)]
11pub(super) struct SlashCommandSelector<T: PopoverTrigger> {
12 working_set: Arc<SlashCommandWorkingSet>,
13 active_context_editor: WeakView<ContextEditor>,
14 trigger: T,
15}
16
17#[derive(Clone)]
18struct SlashCommandInfo {
19 name: SharedString,
20 description: SharedString,
21 args: Option<SharedString>,
22 icon: IconName,
23}
24
25#[derive(Clone)]
26enum SlashCommandEntry {
27 Info(SlashCommandInfo),
28 Advert {
29 name: SharedString,
30 renderer: fn(&mut WindowContext<'_>) -> AnyElement,
31 on_confirm: fn(&mut WindowContext<'_>),
32 },
33}
34
35impl AsRef<str> for SlashCommandEntry {
36 fn as_ref(&self) -> &str {
37 match self {
38 SlashCommandEntry::Info(SlashCommandInfo { name, .. })
39 | SlashCommandEntry::Advert { name, .. } => name,
40 }
41 }
42}
43
44pub(crate) struct SlashCommandDelegate {
45 all_commands: Vec<SlashCommandEntry>,
46 filtered_commands: Vec<SlashCommandEntry>,
47 active_context_editor: WeakView<ContextEditor>,
48 selected_index: usize,
49}
50
51impl<T: PopoverTrigger> SlashCommandSelector<T> {
52 pub(crate) fn new(
53 working_set: Arc<SlashCommandWorkingSet>,
54 active_context_editor: WeakView<ContextEditor>,
55 trigger: T,
56 ) -> Self {
57 SlashCommandSelector {
58 working_set,
59 active_context_editor,
60 trigger,
61 }
62 }
63}
64
65impl PickerDelegate for SlashCommandDelegate {
66 type ListItem = ListItem;
67
68 fn match_count(&self) -> usize {
69 self.filtered_commands.len()
70 }
71
72 fn selected_index(&self) -> usize {
73 self.selected_index
74 }
75
76 fn set_selected_index(&mut self, ix: usize, cx: &mut ViewContext<Picker<Self>>) {
77 self.selected_index = ix.min(self.filtered_commands.len().saturating_sub(1));
78 cx.notify();
79 }
80
81 fn placeholder_text(&self, _cx: &mut WindowContext) -> Arc<str> {
82 "Select a command...".into()
83 }
84
85 fn update_matches(&mut self, query: String, cx: &mut ViewContext<Picker<Self>>) -> Task<()> {
86 let all_commands = self.all_commands.clone();
87 cx.spawn(|this, mut cx| async move {
88 let filtered_commands = cx
89 .background_executor()
90 .spawn(async move {
91 if query.is_empty() {
92 all_commands
93 } else {
94 all_commands
95 .into_iter()
96 .filter(|model_info| {
97 model_info
98 .as_ref()
99 .to_lowercase()
100 .contains(&query.to_lowercase())
101 })
102 .collect()
103 }
104 })
105 .await;
106
107 this.update(&mut cx, |this, cx| {
108 this.delegate.filtered_commands = filtered_commands;
109 this.delegate.set_selected_index(0, cx);
110 cx.notify();
111 })
112 .ok();
113 })
114 }
115
116 fn separators_after_indices(&self) -> Vec<usize> {
117 let mut ret = vec![];
118 let mut previous_is_advert = false;
119
120 for (index, command) in self.filtered_commands.iter().enumerate() {
121 if previous_is_advert {
122 if let SlashCommandEntry::Info(_) = command {
123 previous_is_advert = false;
124 debug_assert_ne!(
125 index, 0,
126 "index cannot be zero, as we can never have a separator at 0th position"
127 );
128 ret.push(index - 1);
129 }
130 } else {
131 if let SlashCommandEntry::Advert { .. } = command {
132 previous_is_advert = true;
133 if index != 0 {
134 ret.push(index - 1);
135 }
136 }
137 }
138 }
139 ret
140 }
141
142 fn confirm(&mut self, _secondary: bool, cx: &mut ViewContext<Picker<Self>>) {
143 if let Some(command) = self.filtered_commands.get(self.selected_index) {
144 match command {
145 SlashCommandEntry::Info(info) => {
146 self.active_context_editor
147 .update(cx, |context_editor, cx| {
148 context_editor.insert_command(&info.name, cx)
149 })
150 .ok();
151 }
152 SlashCommandEntry::Advert { on_confirm, .. } => {
153 on_confirm(cx);
154 }
155 }
156 cx.emit(DismissEvent);
157 }
158 }
159
160 fn dismissed(&mut self, _cx: &mut ViewContext<Picker<Self>>) {}
161
162 fn editor_position(&self) -> PickerEditorPosition {
163 PickerEditorPosition::End
164 }
165
166 fn render_match(
167 &self,
168 ix: usize,
169 selected: bool,
170 cx: &mut ViewContext<Picker<Self>>,
171 ) -> Option<Self::ListItem> {
172 let command_info = self.filtered_commands.get(ix)?;
173
174 match command_info {
175 SlashCommandEntry::Info(info) => Some(
176 ListItem::new(ix)
177 .inset(true)
178 .spacing(ListItemSpacing::Dense)
179 .selected(selected)
180 .child(
181 v_flex()
182 .group(format!("command-entry-label-{ix}"))
183 .w_full()
184 .min_w(px(250.))
185 .child(
186 h_flex()
187 .gap_1p5()
188 .child(Icon::new(info.icon).size(IconSize::XSmall))
189 .child(div().font_buffer(cx).child({
190 let mut label = format!("{}", info.name);
191 if let Some(args) = info.args.as_ref().filter(|_| selected)
192 {
193 label.push_str(&args);
194 }
195 Label::new(label).size(LabelSize::Small)
196 }))
197 .children(info.args.clone().filter(|_| !selected).map(
198 |args| {
199 div()
200 .font_buffer(cx)
201 .child(
202 Label::new(args)
203 .size(LabelSize::Small)
204 .color(Color::Muted),
205 )
206 .visible_on_hover(format!(
207 "command-entry-label-{ix}"
208 ))
209 },
210 )),
211 )
212 .child(
213 Label::new(info.description.clone())
214 .size(LabelSize::Small)
215 .color(Color::Muted),
216 ),
217 ),
218 ),
219 SlashCommandEntry::Advert { renderer, .. } => Some(
220 ListItem::new(ix)
221 .inset(true)
222 .spacing(ListItemSpacing::Dense)
223 .selected(selected)
224 .child(renderer(cx)),
225 ),
226 }
227 }
228}
229
230impl<T: PopoverTrigger> RenderOnce for SlashCommandSelector<T> {
231 fn render(self, cx: &mut WindowContext) -> impl IntoElement {
232 let all_models = self
233 .working_set
234 .featured_command_names(cx)
235 .into_iter()
236 .filter_map(|command_name| {
237 let command = self.working_set.command(&command_name, cx)?;
238 let menu_text = SharedString::from(Arc::from(command.menu_text()));
239 let label = command.label(cx);
240 let args = label.filter_range.end.ne(&label.text.len()).then(|| {
241 SharedString::from(
242 label.text[label.filter_range.end..label.text.len()].to_owned(),
243 )
244 });
245 Some(SlashCommandEntry::Info(SlashCommandInfo {
246 name: command_name.into(),
247 description: menu_text,
248 args,
249 icon: command.icon(),
250 }))
251 })
252 .chain([SlashCommandEntry::Advert {
253 name: "create-your-command".into(),
254 renderer: |cx| {
255 v_flex()
256 .w_full()
257 .child(
258 h_flex()
259 .w_full()
260 .font_buffer(cx)
261 .items_center()
262 .justify_between()
263 .child(
264 h_flex()
265 .items_center()
266 .gap_1p5()
267 .child(Icon::new(IconName::Plus).size(IconSize::XSmall))
268 .child(
269 div().font_buffer(cx).child(
270 Label::new("create-your-command")
271 .size(LabelSize::Small),
272 ),
273 ),
274 )
275 .child(
276 Icon::new(IconName::ArrowUpRight)
277 .size(IconSize::XSmall)
278 .color(Color::Muted),
279 ),
280 )
281 .child(
282 Label::new("Create your custom command")
283 .size(LabelSize::Small)
284 .color(Color::Muted),
285 )
286 .into_any_element()
287 },
288 on_confirm: |cx| cx.open_url("https://zed.dev/docs/extensions/slash-commands"),
289 }])
290 .collect::<Vec<_>>();
291
292 let delegate = SlashCommandDelegate {
293 all_commands: all_models.clone(),
294 active_context_editor: self.active_context_editor.clone(),
295 filtered_commands: all_models,
296 selected_index: 0,
297 };
298
299 let picker_view = cx.new_view(|cx| {
300 let picker = Picker::uniform_list(delegate, cx).max_height(Some(rems(20.).into()));
301 picker
302 });
303
304 let handle = self
305 .active_context_editor
306 .update(cx, |this, _| this.slash_menu_handle.clone())
307 .ok();
308 PopoverMenu::new("model-switcher")
309 .menu(move |_cx| Some(picker_view.clone()))
310 .trigger(self.trigger)
311 .attach(gpui::AnchorCorner::TopLeft)
312 .anchor(gpui::AnchorCorner::BottomLeft)
313 .offset(gpui::Point {
314 x: px(0.0),
315 y: px(-16.0),
316 })
317 .when_some(handle, |this, handle| this.with_handle(handle))
318 }
319}