edit predictions: Add enabled_in_assistant setting (#25767)

Release Notes:

- edit predictions: Add `enabled_in_assistant` setting

assets/settings/default.json

@@ -846,7 +846,10 @@
     //     "mode": "eager"
     // 2. Display predictions inline only when holding a modifier key (alt by default).
     //     "mode": "subtle"
-    "mode": "eager"
+    "mode": "eager",
+    // Whether edit predictions are enabled in the assistant prompt editor.
+    // This setting has no effect if globally disabled.
+    "enabled_in_assistant": true
   },
   // Settings specific to journaling
   "journal": {

crates/assistant_context_editor/src/context_editor.rs

@@ -29,7 +29,10 @@ use gpui::{
     WeakEntity,
 };
 use indexed_docs::IndexedDocsStore;
-use language::{language_settings::SoftWrap, BufferSnapshot, LspAdapterDelegate, ToOffset};
+use language::{
+    language_settings::{all_language_settings, SoftWrap},
+    BufferSnapshot, LspAdapterDelegate, ToOffset,
+};
 use language_model::{
     LanguageModelImage, LanguageModelProvider, LanguageModelProviderTosView, LanguageModelRegistry,
     Role,
@@ -41,7 +44,7 @@ use project::lsp_store::LocalLspAdapterDelegate;
 use project::{Project, Worktree};
 use rope::Point;
 use serde::{Deserialize, Serialize};
-use settings::{update_settings_file, Settings};
+use settings::{update_settings_file, Settings, SettingsStore};
 use std::{any::TypeId, borrow::Cow, cmp, ops::Range, path::PathBuf, sync::Arc, time::Duration};
 use text::SelectionGoal;
 use ui::{
@@ -228,6 +231,13 @@ impl ContextEditor {
             editor.set_completion_provider(Some(Box::new(completion_provider)));
             editor.set_menu_inline_completions_policy(MenuInlineCompletionsPolicy::Never);
             editor.set_collaboration_hub(Box::new(project.clone()));
+
+            let show_edit_predictions = all_language_settings(None, cx)
+                .edit_predictions
+                .enabled_in_assistant;
+
+            editor.set_show_edit_predictions(Some(show_edit_predictions), window, cx);
+
             editor
         });
 
@@ -236,6 +246,7 @@ impl ContextEditor {
             cx.subscribe_in(&context, window, Self::handle_context_event),
             cx.subscribe_in(&editor, window, Self::handle_editor_event),
             cx.subscribe_in(&editor, window, Self::handle_editor_search_event),
+            cx.observe_global_in::<SettingsStore>(window, Self::settings_changed),
         ];
 
         let fs_clone = fs.clone();
@@ -286,6 +297,16 @@ impl ContextEditor {
         this
     }
 
+    fn settings_changed(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        self.editor.update(cx, |editor, cx| {
+            let show_edit_predictions = all_language_settings(None, cx)
+                .edit_predictions
+                .enabled_in_assistant;
+
+            editor.set_show_edit_predictions(Some(show_edit_predictions), window, cx);
+        });
+    }
+
     pub fn context(&self) -> &Entity<AssistantContext> {
         &self.context
     }

crates/language/src/language_settings.rs

@@ -236,6 +236,9 @@ pub struct EditPredictionSettings {
     pub mode: EditPredictionsMode,
     /// Settings specific to GitHub Copilot.
     pub copilot: CopilotSettings,
+    /// Whether edit predictions are enabled in the assistant prompt editor.
+    /// This setting has no effect if globally disabled.
+    pub enabled_in_assistant: bool,
 }
 
 impl EditPredictionSettings {
@@ -500,6 +503,10 @@ pub struct EditPredictionSettingsContent {
     /// Settings specific to GitHub Copilot.
     #[serde(default)]
     pub copilot: CopilotSettingsContent,
+    /// Whether edit predictions are enabled in the assistant prompt editor.
+    /// This has no effect if globally disabled.
+    #[serde(default = "default_true")]
+    pub enabled_in_assistant: bool,
 }
 
 #[derive(Clone, Debug, Default, Serialize, Deserialize, JsonSchema, PartialEq)]
@@ -1119,6 +1126,12 @@ impl settings::Settings for AllLanguageSettings {
             })
             .unwrap_or_default();
 
+        let mut edit_predictions_enabled_in_assistant = default_value
+            .edit_predictions
+            .as_ref()
+            .map(|settings| settings.enabled_in_assistant)
+            .unwrap_or(true);
+
         let mut file_types: HashMap<Arc<str>, GlobSet> = HashMap::default();
 
         for (language, suffixes) in &default_value.file_types {
@@ -1145,6 +1158,7 @@ impl settings::Settings for AllLanguageSettings {
 
             if let Some(edit_predictions) = user_settings.edit_predictions.as_ref() {
                 edit_predictions_mode = edit_predictions.mode;
+                edit_predictions_enabled_in_assistant = edit_predictions.enabled_in_assistant;
 
                 if let Some(disabled_globs) = edit_predictions.disabled_globs.as_ref() {
                     completion_globs.extend(disabled_globs.iter());
@@ -1224,6 +1238,7 @@ impl settings::Settings for AllLanguageSettings {
                     .collect(),
                 mode: edit_predictions_mode,
                 copilot: copilot_settings,
+                enabled_in_assistant: edit_predictions_enabled_in_assistant,
             },
             defaults,
             languages,

docs/src/configuring-zed.md

@@ -406,6 +406,12 @@ There are two options to choose from:
 
 List of `string` values.
 
+### Enabled in Assistant
+
+- Description: Whether to show edit predictions in the assistant's prompt editor.
+- Setting: `enabled_in_assistant`
+- Default: `true`
+
 ## Edit Predictions Disabled in
 
 - Description: A list of language scopes in which edit predictions should be disabled.