acp: Fix slash command hint showing up after sending message (#40109)

Release Notes:

- N/A

crates/agent_ui/src/acp/completion_provider.rs

@@ -27,7 +27,7 @@ use util::rel_path::RelPath;
 use workspace::Workspace;
 
 use crate::AgentPanel;
-use crate::acp::message_editor::{MessageEditor, MessageEditorEvent};
+use crate::acp::message_editor::MessageEditor;
 use crate::context_picker::file_context_picker::{FileMatch, search_files};
 use crate::context_picker::rules_context_picker::{RulesContextEntry, search_rules};
 use crate::context_picker::symbol_context_picker::SymbolMatch;
@@ -759,13 +759,13 @@ impl CompletionProvider for ContextPickerCompletionProvider {
                                                 let editor = editor.clone();
                                                 move |cx| {
                                                     editor
-                                                        .update(cx, |_editor, cx| {
+                                                        .update(cx, |editor, cx| {
                                                             match intent {
                                                                 CompletionIntent::Complete
                                                                 | CompletionIntent::CompleteWithInsert
                                                                 | CompletionIntent::CompleteWithReplace => {
                                                                     if !is_missing_argument {
-                                                                        cx.emit(MessageEditorEvent::Send);
+                                                                        editor.send(cx);
                                                                     }
                                                                 }
                                                                 CompletionIntent::Compose => {}

crates/agent_ui/src/acp/message_editor.rs

@@ -141,7 +141,9 @@ impl MessageEditor {
 
         subscriptions.push(cx.subscribe_in(&editor, window, {
             move |this, editor, event, window, cx| {
-                if let EditorEvent::Edited { .. } = event {
+                if let EditorEvent::Edited { .. } = event
+                    && !editor.read(cx).read_only(cx)
+                {
                     let snapshot = editor.update(cx, |editor, cx| {
                         let new_hints = this
                             .command_hint(editor.buffer(), cx)
@@ -823,13 +825,20 @@ impl MessageEditor {
         });
     }
 
-    fn send(&mut self, _: &Chat, _: &mut Window, cx: &mut Context<Self>) {
+    pub fn send(&mut self, cx: &mut Context<Self>) {
         if self.is_empty(cx) {
             return;
         }
+        self.editor.update(cx, |editor, cx| {
+            editor.clear_inlay_hints(cx);
+        });
         cx.emit(MessageEditorEvent::Send)
     }
 
+    fn chat(&mut self, _: &Chat, _: &mut Window, cx: &mut Context<Self>) {
+        self.send(cx);
+    }
+
     fn cancel(&mut self, _: &editor::actions::Cancel, _: &mut Window, cx: &mut Context<Self>) {
         cx.emit(MessageEditorEvent::Cancel)
     }
@@ -1288,7 +1297,7 @@ impl Render for MessageEditor {
     fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
         div()
             .key_context("MessageEditor")
-            .on_action(cx.listener(Self::send))
+            .on_action(cx.listener(Self::chat))
             .on_action(cx.listener(Self::cancel))
             .capture_action(cx.listener(Self::paste))
             .flex_1()

crates/editor/src/editor.rs

@@ -5243,15 +5243,7 @@ impl Editor {
                         if enabled {
                             (InvalidationStrategy::RefreshRequested, None)
                         } else {
-                            self.splice_inlays(
-                                &self
-                                    .visible_inlay_hints(cx)
-                                    .iter()
-                                    .map(|inlay| inlay.id)
-                                    .collect::<Vec<InlayId>>(),
-                                Vec::new(),
-                                cx,
-                            );
+                            self.clear_inlay_hints(cx);
                             return;
                         }
                     }
@@ -5263,15 +5255,7 @@ impl Editor {
                     if enabled {
                         (InvalidationStrategy::RefreshRequested, None)
                     } else {
-                        self.splice_inlays(
-                            &self
-                                .visible_inlay_hints(cx)
-                                .iter()
-                                .map(|inlay| inlay.id)
-                                .collect::<Vec<InlayId>>(),
-                            Vec::new(),
-                            cx,
-                        );
+                        self.clear_inlay_hints(cx);
                         return;
                     }
                 } else {
@@ -5282,7 +5266,7 @@ impl Editor {
                 match self.inlay_hint_cache.update_settings(
                     &self.buffer,
                     new_settings,
-                    self.visible_inlay_hints(cx),
+                    self.visible_inlay_hints(cx).cloned().collect::<Vec<_>>(),
                     cx,
                 ) {
                     ControlFlow::Break(Some(InlaySplice {
@@ -5332,13 +5316,25 @@ impl Editor {
         }
     }
 
-    fn visible_inlay_hints(&self, cx: &Context<Editor>) -> Vec<Inlay> {
+    pub fn clear_inlay_hints(&self, cx: &mut Context<Editor>) {
+        self.splice_inlays(
+            &self
+                .visible_inlay_hints(cx)
+                .map(|inlay| inlay.id)
+                .collect::<Vec<_>>(),
+            Vec::new(),
+            cx,
+        );
+    }
+
+    fn visible_inlay_hints<'a>(
+        &'a self,
+        cx: &'a Context<Editor>,
+    ) -> impl Iterator<Item = &'a Inlay> {
         self.display_map
             .read(cx)
             .current_inlays()
             .filter(move |inlay| matches!(inlay.id, InlayId::Hint(_)))
-            .cloned()
-            .collect()
     }
 
     pub fn visible_excerpts(

crates/editor/src/hover_links.rs

@@ -307,7 +307,6 @@ pub fn update_inlay_link_and_hover_points(
             buffer_snapshot.anchor_after(point_for_position.next_valid.to_point(snapshot));
         if let Some(hovered_hint) = editor
             .visible_inlay_hints(cx)
-            .into_iter()
             .skip_while(|hint| {
                 hint.position
                     .cmp(&previous_valid_anchor, &buffer_snapshot)

crates/editor/src/inlay_hint_cache.rs

@@ -1013,7 +1013,7 @@ fn fetch_and_update_hints(
                 .cloned()
         })?;
 
-        let visible_hints = editor.update(cx, |editor, cx| editor.visible_inlay_hints(cx))?;
+        let visible_hints = editor.update(cx, |editor, cx| editor.visible_inlay_hints(cx).cloned().collect::<Vec<_>>())?;
         let new_hints = match inlay_hints_fetch_task {
             Some(fetch_task) => {
                 log::debug!(
@@ -3570,7 +3570,6 @@ pub mod tests {
     pub fn visible_hint_labels(editor: &Editor, cx: &Context<Editor>) -> Vec<String> {
         editor
             .visible_inlay_hints(cx)
-            .into_iter()
             .map(|hint| hint.text().to_string())
             .collect()
     }