1use std::sync::Arc;
2
3use assistant_tool::ToolWorkingSet;
4use collections::HashMap;
5use gpui::{
6 list, AbsoluteLength, AnyElement, AppContext, DefiniteLength, EdgesRefinement, Empty, Length,
7 ListAlignment, ListOffset, ListState, Model, StyleRefinement, Subscription,
8 TextStyleRefinement, UnderlineStyle, View, WeakView,
9};
10use language::LanguageRegistry;
11use language_model::Role;
12use markdown::{Markdown, MarkdownStyle};
13use settings::Settings as _;
14use theme::ThemeSettings;
15use ui::prelude::*;
16use workspace::Workspace;
17
18use crate::thread::{MessageId, Thread, ThreadError, ThreadEvent};
19use crate::ui::ContextPill;
20
21pub struct ActiveThread {
22 workspace: WeakView<Workspace>,
23 language_registry: Arc<LanguageRegistry>,
24 tools: Arc<ToolWorkingSet>,
25 pub(crate) thread: Model<Thread>,
26 messages: Vec<MessageId>,
27 list_state: ListState,
28 rendered_messages_by_id: HashMap<MessageId, View<Markdown>>,
29 last_error: Option<ThreadError>,
30 _subscriptions: Vec<Subscription>,
31}
32
33impl ActiveThread {
34 pub fn new(
35 thread: Model<Thread>,
36 workspace: WeakView<Workspace>,
37 language_registry: Arc<LanguageRegistry>,
38 tools: Arc<ToolWorkingSet>,
39 cx: &mut ViewContext<Self>,
40 ) -> Self {
41 let subscriptions = vec![
42 cx.observe(&thread, |_, _, cx| cx.notify()),
43 cx.subscribe(&thread, Self::handle_thread_event),
44 ];
45
46 let mut this = Self {
47 workspace,
48 language_registry,
49 tools,
50 thread: thread.clone(),
51 messages: Vec::new(),
52 rendered_messages_by_id: HashMap::default(),
53 list_state: ListState::new(0, ListAlignment::Bottom, px(1024.), {
54 let this = cx.view().downgrade();
55 move |ix, cx: &mut WindowContext| {
56 this.update(cx, |this, cx| this.render_message(ix, cx))
57 .unwrap()
58 }
59 }),
60 last_error: None,
61 _subscriptions: subscriptions,
62 };
63
64 for message in thread.read(cx).messages().cloned().collect::<Vec<_>>() {
65 this.push_message(&message.id, message.text.clone(), cx);
66 }
67
68 this
69 }
70
71 pub fn is_empty(&self) -> bool {
72 self.messages.is_empty()
73 }
74
75 pub fn summary(&self, cx: &AppContext) -> Option<SharedString> {
76 self.thread.read(cx).summary()
77 }
78
79 pub fn summary_or_default(&self, cx: &AppContext) -> SharedString {
80 self.thread.read(cx).summary_or_default()
81 }
82
83 pub fn cancel_last_completion(&mut self, cx: &mut AppContext) -> bool {
84 self.last_error.take();
85 self.thread
86 .update(cx, |thread, _cx| thread.cancel_last_completion())
87 }
88
89 pub fn last_error(&self) -> Option<ThreadError> {
90 self.last_error.clone()
91 }
92
93 pub fn clear_last_error(&mut self) {
94 self.last_error.take();
95 }
96
97 fn push_message(&mut self, id: &MessageId, text: String, cx: &mut ViewContext<Self>) {
98 let old_len = self.messages.len();
99 self.messages.push(*id);
100 self.list_state.splice(old_len..old_len, 1);
101
102 let theme_settings = ThemeSettings::get_global(cx);
103 let colors = cx.theme().colors();
104 let ui_font_size = TextSize::Default.rems(cx);
105 let buffer_font_size = TextSize::Small.rems(cx);
106 let mut text_style = cx.text_style();
107
108 text_style.refine(&TextStyleRefinement {
109 font_family: Some(theme_settings.ui_font.family.clone()),
110 font_size: Some(ui_font_size.into()),
111 color: Some(cx.theme().colors().text),
112 ..Default::default()
113 });
114
115 let markdown_style = MarkdownStyle {
116 base_text_style: text_style,
117 syntax: cx.theme().syntax().clone(),
118 selection_background_color: cx.theme().players().local().selection,
119 code_block: StyleRefinement {
120 margin: EdgesRefinement {
121 top: Some(Length::Definite(rems(0.).into())),
122 left: Some(Length::Definite(rems(0.).into())),
123 right: Some(Length::Definite(rems(0.).into())),
124 bottom: Some(Length::Definite(rems(0.5).into())),
125 },
126 padding: EdgesRefinement {
127 top: Some(DefiniteLength::Absolute(AbsoluteLength::Pixels(Pixels(8.)))),
128 left: Some(DefiniteLength::Absolute(AbsoluteLength::Pixels(Pixels(8.)))),
129 right: Some(DefiniteLength::Absolute(AbsoluteLength::Pixels(Pixels(8.)))),
130 bottom: Some(DefiniteLength::Absolute(AbsoluteLength::Pixels(Pixels(8.)))),
131 },
132 background: Some(colors.editor_background.into()),
133 border_color: Some(colors.border_variant),
134 border_widths: EdgesRefinement {
135 top: Some(AbsoluteLength::Pixels(Pixels(1.))),
136 left: Some(AbsoluteLength::Pixels(Pixels(1.))),
137 right: Some(AbsoluteLength::Pixels(Pixels(1.))),
138 bottom: Some(AbsoluteLength::Pixels(Pixels(1.))),
139 },
140 text: Some(TextStyleRefinement {
141 font_family: Some(theme_settings.buffer_font.family.clone()),
142 font_size: Some(buffer_font_size.into()),
143 ..Default::default()
144 }),
145 ..Default::default()
146 },
147 inline_code: TextStyleRefinement {
148 font_family: Some(theme_settings.buffer_font.family.clone()),
149 font_size: Some(buffer_font_size.into()),
150 background_color: Some(colors.editor_foreground.opacity(0.1)),
151 ..Default::default()
152 },
153 link: TextStyleRefinement {
154 background_color: Some(colors.editor_foreground.opacity(0.025)),
155 underline: Some(UnderlineStyle {
156 color: Some(colors.text_accent.opacity(0.5)),
157 thickness: px(1.),
158 ..Default::default()
159 }),
160 ..Default::default()
161 },
162 ..Default::default()
163 };
164
165 let markdown = cx.new_view(|cx| {
166 Markdown::new(
167 text,
168 markdown_style,
169 Some(self.language_registry.clone()),
170 None,
171 cx,
172 )
173 });
174 self.rendered_messages_by_id.insert(*id, markdown);
175 self.list_state.scroll_to(ListOffset {
176 item_ix: old_len,
177 offset_in_item: Pixels(0.0),
178 });
179 }
180
181 fn handle_thread_event(
182 &mut self,
183 _: Model<Thread>,
184 event: &ThreadEvent,
185 cx: &mut ViewContext<Self>,
186 ) {
187 match event {
188 ThreadEvent::ShowError(error) => {
189 self.last_error = Some(error.clone());
190 }
191 ThreadEvent::StreamedCompletion => {}
192 ThreadEvent::SummaryChanged => {}
193 ThreadEvent::StreamedAssistantText(message_id, text) => {
194 if let Some(markdown) = self.rendered_messages_by_id.get_mut(&message_id) {
195 markdown.update(cx, |markdown, cx| {
196 markdown.append(text, cx);
197 });
198 }
199 }
200 ThreadEvent::MessageAdded(message_id) => {
201 if let Some(message_text) = self
202 .thread
203 .read(cx)
204 .message(*message_id)
205 .map(|message| message.text.clone())
206 {
207 self.push_message(message_id, message_text, cx);
208 }
209
210 cx.notify();
211 }
212 ThreadEvent::UsePendingTools => {
213 let pending_tool_uses = self
214 .thread
215 .read(cx)
216 .pending_tool_uses()
217 .into_iter()
218 .filter(|tool_use| tool_use.status.is_idle())
219 .cloned()
220 .collect::<Vec<_>>();
221
222 for tool_use in pending_tool_uses {
223 if let Some(tool) = self.tools.tool(&tool_use.name, cx) {
224 let task = tool.run(tool_use.input, self.workspace.clone(), cx);
225
226 self.thread.update(cx, |thread, cx| {
227 thread.insert_tool_output(
228 tool_use.assistant_message_id,
229 tool_use.id.clone(),
230 task,
231 cx,
232 );
233 });
234 }
235 }
236 }
237 ThreadEvent::ToolFinished { .. } => {}
238 }
239 }
240
241 fn render_message(&self, ix: usize, cx: &mut ViewContext<Self>) -> AnyElement {
242 let message_id = self.messages[ix];
243 let Some(message) = self.thread.read(cx).message(message_id) else {
244 return Empty.into_any();
245 };
246
247 let Some(markdown) = self.rendered_messages_by_id.get(&message_id) else {
248 return Empty.into_any();
249 };
250
251 let context = self.thread.read(cx).context_for_message(message_id);
252 let colors = cx.theme().colors();
253
254 let message_content = v_flex()
255 .child(div().p_2p5().text_ui(cx).child(markdown.clone()))
256 .when_some(context, |parent, context| {
257 if !context.is_empty() {
258 parent.child(
259 h_flex().flex_wrap().gap_1().px_1p5().pb_1p5().children(
260 context
261 .into_iter()
262 .map(|context| ContextPill::new_added(context, false, false, None)),
263 ),
264 )
265 } else {
266 parent
267 }
268 });
269
270 let styled_message = match message.role {
271 Role::User => v_flex()
272 .id(("message-container", ix))
273 .py_1()
274 .px_2p5()
275 .child(
276 v_flex()
277 .bg(colors.editor_background)
278 .rounded_lg()
279 .border_1()
280 .border_color(colors.border)
281 .shadow_sm()
282 .child(
283 h_flex()
284 .py_1()
285 .px_2()
286 .bg(colors.editor_foreground.opacity(0.05))
287 .border_b_1()
288 .border_color(colors.border)
289 .justify_between()
290 .rounded_t(px(6.))
291 .child(
292 h_flex()
293 .gap_1p5()
294 .child(
295 Icon::new(IconName::PersonCircle)
296 .size(IconSize::XSmall)
297 .color(Color::Muted),
298 )
299 .child(
300 Label::new("You")
301 .size(LabelSize::Small)
302 .color(Color::Muted),
303 ),
304 ),
305 )
306 .child(message_content),
307 ),
308 Role::Assistant => div().id(("message-container", ix)).child(message_content),
309 Role::System => div().id(("message-container", ix)).py_1().px_2().child(
310 v_flex()
311 .bg(colors.editor_background)
312 .rounded_md()
313 .child(message_content),
314 ),
315 };
316
317 styled_message.into_any()
318 }
319}
320
321impl Render for ActiveThread {
322 fn render(&mut self, _cx: &mut ViewContext<Self>) -> impl IntoElement {
323 v_flex()
324 .size_full()
325 .pt_1p5()
326 .child(list(self.list_state.clone()).flex_grow())
327 }
328}