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, 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 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 last_error(&self) -> Option<ThreadError> {
80 self.last_error.clone()
81 }
82
83 pub fn clear_last_error(&mut self) {
84 self.last_error.take();
85 }
86
87 fn push_message(&mut self, id: &MessageId, text: String, cx: &mut ViewContext<Self>) {
88 let old_len = self.messages.len();
89 self.messages.push(*id);
90 self.list_state.splice(old_len..old_len, 1);
91
92 let theme_settings = ThemeSettings::get_global(cx);
93 let colors = cx.theme().colors();
94 let ui_font_size = TextSize::Default.rems(cx);
95 let buffer_font_size = TextSize::Small.rems(cx);
96 let mut text_style = cx.text_style();
97
98 text_style.refine(&TextStyleRefinement {
99 font_family: Some(theme_settings.ui_font.family.clone()),
100 font_size: Some(ui_font_size.into()),
101 color: Some(cx.theme().colors().text),
102 ..Default::default()
103 });
104
105 let markdown_style = MarkdownStyle {
106 base_text_style: text_style,
107 syntax: cx.theme().syntax().clone(),
108 selection_background_color: cx.theme().players().local().selection,
109 code_block: StyleRefinement {
110 margin: EdgesRefinement {
111 top: Some(Length::Definite(rems(1.0).into())),
112 left: Some(Length::Definite(rems(0.).into())),
113 right: Some(Length::Definite(rems(0.).into())),
114 bottom: Some(Length::Definite(rems(1.).into())),
115 },
116 padding: EdgesRefinement {
117 top: Some(DefiniteLength::Absolute(AbsoluteLength::Pixels(Pixels(8.)))),
118 left: Some(DefiniteLength::Absolute(AbsoluteLength::Pixels(Pixels(8.)))),
119 right: Some(DefiniteLength::Absolute(AbsoluteLength::Pixels(Pixels(8.)))),
120 bottom: Some(DefiniteLength::Absolute(AbsoluteLength::Pixels(Pixels(8.)))),
121 },
122 background: Some(colors.editor_foreground.opacity(0.01).into()),
123 border_color: Some(colors.border_variant.opacity(0.3)),
124 border_widths: EdgesRefinement {
125 top: Some(AbsoluteLength::Pixels(Pixels(1.0))),
126 left: Some(AbsoluteLength::Pixels(Pixels(1.))),
127 right: Some(AbsoluteLength::Pixels(Pixels(1.))),
128 bottom: Some(AbsoluteLength::Pixels(Pixels(1.))),
129 },
130 text: Some(TextStyleRefinement {
131 font_family: Some(theme_settings.buffer_font.family.clone()),
132 font_size: Some(buffer_font_size.into()),
133 ..Default::default()
134 }),
135 ..Default::default()
136 },
137 inline_code: TextStyleRefinement {
138 font_family: Some(theme_settings.buffer_font.family.clone()),
139 font_size: Some(buffer_font_size.into()),
140 background_color: Some(colors.editor_foreground.opacity(0.01)),
141 ..Default::default()
142 },
143 ..Default::default()
144 };
145
146 let markdown = cx.new_view(|cx| {
147 Markdown::new(
148 text,
149 markdown_style,
150 Some(self.language_registry.clone()),
151 None,
152 cx,
153 )
154 });
155 self.rendered_messages_by_id.insert(*id, markdown);
156 self.list_state.scroll_to(ListOffset {
157 item_ix: old_len,
158 offset_in_item: Pixels(0.0),
159 });
160 }
161
162 fn handle_thread_event(
163 &mut self,
164 _: Model<Thread>,
165 event: &ThreadEvent,
166 cx: &mut ViewContext<Self>,
167 ) {
168 match event {
169 ThreadEvent::ShowError(error) => {
170 self.last_error = Some(error.clone());
171 }
172 ThreadEvent::StreamedCompletion => {}
173 ThreadEvent::SummaryChanged => {}
174 ThreadEvent::StreamedAssistantText(message_id, text) => {
175 if let Some(markdown) = self.rendered_messages_by_id.get_mut(&message_id) {
176 markdown.update(cx, |markdown, cx| {
177 markdown.append(text, cx);
178 });
179 }
180 }
181 ThreadEvent::MessageAdded(message_id) => {
182 if let Some(message_text) = self
183 .thread
184 .read(cx)
185 .message(*message_id)
186 .map(|message| message.text.clone())
187 {
188 self.push_message(message_id, message_text, cx);
189 }
190
191 cx.notify();
192 }
193 ThreadEvent::UsePendingTools => {
194 let pending_tool_uses = self
195 .thread
196 .read(cx)
197 .pending_tool_uses()
198 .into_iter()
199 .filter(|tool_use| tool_use.status.is_idle())
200 .cloned()
201 .collect::<Vec<_>>();
202
203 for tool_use in pending_tool_uses {
204 if let Some(tool) = self.tools.tool(&tool_use.name, cx) {
205 let task = tool.run(tool_use.input, self.workspace.clone(), cx);
206
207 self.thread.update(cx, |thread, cx| {
208 thread.insert_tool_output(
209 tool_use.assistant_message_id,
210 tool_use.id.clone(),
211 task,
212 cx,
213 );
214 });
215 }
216 }
217 }
218 ThreadEvent::ToolFinished { .. } => {}
219 }
220 }
221
222 fn render_message(&self, ix: usize, cx: &mut ViewContext<Self>) -> AnyElement {
223 let message_id = self.messages[ix];
224 let Some(message) = self.thread.read(cx).message(message_id) else {
225 return Empty.into_any();
226 };
227
228 let Some(markdown) = self.rendered_messages_by_id.get(&message_id) else {
229 return Empty.into_any();
230 };
231
232 let context = self.thread.read(cx).context_for_message(message_id);
233 let colors = cx.theme().colors();
234
235 let (role_icon, role_name, role_color) = match message.role {
236 Role::User => (IconName::Person, "You", Color::Muted),
237 Role::Assistant => (IconName::ZedAssistant, "Assistant", Color::Accent),
238 Role::System => (IconName::Settings, "System", Color::Default),
239 };
240
241 div()
242 .id(("message-container", ix))
243 .py_1()
244 .px_2()
245 .child(
246 v_flex()
247 .border_1()
248 .border_color(colors.border_variant)
249 .bg(colors.editor_background)
250 .rounded_md()
251 .child(
252 h_flex()
253 .py_1p5()
254 .px_2p5()
255 .border_b_1()
256 .border_color(colors.border_variant)
257 .justify_between()
258 .child(
259 h_flex()
260 .gap_1p5()
261 .child(
262 Icon::new(role_icon)
263 .size(IconSize::XSmall)
264 .color(role_color),
265 )
266 .child(
267 Label::new(role_name)
268 .size(LabelSize::XSmall)
269 .color(role_color),
270 ),
271 ),
272 )
273 .child(div().p_2p5().text_ui(cx).child(markdown.clone()))
274 .when_some(context, |parent, context| {
275 if !context.is_empty() {
276 parent.child(
277 h_flex()
278 .flex_wrap()
279 .gap_1()
280 .px_1p5()
281 .pb_1p5()
282 .children(context.iter().map(|c| ContextPill::new(c.clone()))),
283 )
284 } else {
285 parent
286 }
287 }),
288 )
289 .into_any()
290 }
291}
292
293impl Render for ActiveThread {
294 fn render(&mut self, _cx: &mut ViewContext<Self>) -> impl IntoElement {
295 list(self.list_state.clone()).flex_1().py_1()
296 }
297}