fix: Recalculate completion when going through prompt history

helix-term/src/commands/dap.rs

@@ -580,7 +580,7 @@ pub fn dap_edit_condition(cx: &mut Context) {
             None => return,
         };
         let callback = Box::pin(async move {
-            let call: Callback = Box::new(move |_editor, compositor| {
+            let call: Callback = Box::new(move |editor, compositor| {
                 let mut prompt = Prompt::new(
                     "condition:".into(),
                     None,
@@ -605,7 +605,7 @@ pub fn dap_edit_condition(cx: &mut Context) {
                     },
                 );
                 if let Some(condition) = breakpoint.condition {
-                    prompt.insert_str(&condition)
+                    prompt.insert_str(&condition, editor)
                 }
                 compositor.push(Box::new(prompt));
             });
@@ -622,7 +622,7 @@ pub fn dap_edit_log(cx: &mut Context) {
             None => return,
         };
         let callback = Box::pin(async move {
-            let call: Callback = Box::new(move |_editor, compositor| {
+            let call: Callback = Box::new(move |editor, compositor| {
                 let mut prompt = Prompt::new(
                     "log-message:".into(),
                     None,
@@ -646,7 +646,7 @@ pub fn dap_edit_log(cx: &mut Context) {
                     },
                 );
                 if let Some(log_message) = breakpoint.log_message {
-                    prompt.insert_str(&log_message);
+                    prompt.insert_str(&log_message, editor);
                 }
                 compositor.push(Box::new(prompt));
             });

helix-term/src/ui/mod.rs

@@ -35,10 +35,10 @@ pub fn prompt(
     completion_fn: impl FnMut(&Editor, &str) -> Vec<prompt::Completion> + 'static,
     callback_fn: impl FnMut(&mut crate::compositor::Context, &str, PromptEvent) + 'static,
 ) {
-    show_prompt(
-        cx,
-        Prompt::new(prompt, history_register, completion_fn, callback_fn),
-    );
+    let mut prompt = Prompt::new(prompt, history_register, completion_fn, callback_fn);
+    // Calculate the initial completion
+    prompt.recalculate_completion(cx.editor);
+    cx.push_layer(Box::new(prompt));
 }
 
 pub fn prompt_with_input(
@@ -49,15 +49,8 @@ pub fn prompt_with_input(
     completion_fn: impl FnMut(&Editor, &str) -> Vec<prompt::Completion> + 'static,
     callback_fn: impl FnMut(&mut crate::compositor::Context, &str, PromptEvent) + 'static,
 ) {
-    show_prompt(
-        cx,
-        Prompt::new(prompt, history_register, completion_fn, callback_fn).with_line(input),
-    );
-}
-
-fn show_prompt(cx: &mut crate::commands::Context, mut prompt: Prompt) {
-    // Calculate initial completion
-    prompt.recalculate_completion(cx.editor);
+    let prompt = Prompt::new(prompt, history_register, completion_fn, callback_fn)
+        .with_line(input, cx.editor);
     cx.push_layer(Box::new(prompt));
 }
 

helix-term/src/ui/picker.rs

@@ -471,7 +471,7 @@ impl<T: Item> Picker<T> {
         self.filters
             .extend(self.matches.iter().map(|(index, _)| *index));
         self.filters.sort_unstable(); // used for binary search later
-        self.prompt.clear(cx);
+        self.prompt.clear(cx.editor);
     }
 
     pub fn toggle_preview(&mut self) {

helix-term/src/ui/prompt.rs

@@ -84,10 +84,11 @@ impl Prompt {
         }
     }
 
-    pub fn with_line(mut self, line: String) -> Self {
+    pub fn with_line(mut self, line: String, editor: &Editor) -> Self {
         let cursor = line.len();
         self.line = line;
         self.cursor = cursor;
+        self.recalculate_completion(editor);
         self
     }
 
@@ -96,6 +97,7 @@ impl Prompt {
     }
 
     pub fn recalculate_completion(&mut self, editor: &Editor) {
+        self.exit_selection();
         self.completion = (self.completion_fn)(editor, &self.line);
     }
 
@@ -214,12 +216,12 @@ impl Prompt {
             self.cursor = pos;
         }
         self.recalculate_completion(cx.editor);
-        self.exit_selection();
     }
 
-    pub fn insert_str(&mut self, s: &str) {
+    pub fn insert_str(&mut self, s: &str, editor: &Editor) {
         self.line.insert_str(self.cursor, s);
         self.cursor += s.len();
+        self.recalculate_completion(editor);
     }
 
     pub fn move_cursor(&mut self, movement: Movement) {
@@ -235,65 +237,65 @@ impl Prompt {
         self.cursor = self.line.len();
     }
 
-    pub fn delete_char_backwards(&mut self, cx: &Context) {
+    pub fn delete_char_backwards(&mut self, editor: &Editor) {
         let pos = self.eval_movement(Movement::BackwardChar(1));
         self.line.replace_range(pos..self.cursor, "");
         self.cursor = pos;
 
-        self.exit_selection();
-        self.recalculate_completion(cx.editor);
+        self.recalculate_completion(editor);
     }
 
-    pub fn delete_char_forwards(&mut self, cx: &Context) {
+    pub fn delete_char_forwards(&mut self, editor: &Editor) {
         let pos = self.eval_movement(Movement::ForwardChar(1));
         self.line.replace_range(self.cursor..pos, "");
 
-        self.exit_selection();
-        self.recalculate_completion(cx.editor);
+        self.recalculate_completion(editor);
     }
 
-    pub fn delete_word_backwards(&mut self, cx: &Context) {
+    pub fn delete_word_backwards(&mut self, editor: &Editor) {
         let pos = self.eval_movement(Movement::BackwardWord(1));
         self.line.replace_range(pos..self.cursor, "");
         self.cursor = pos;
 
-        self.exit_selection();
-        self.recalculate_completion(cx.editor);
+        self.recalculate_completion(editor);
     }
 
-    pub fn delete_word_forwards(&mut self, cx: &Context) {
+    pub fn delete_word_forwards(&mut self, editor: &Editor) {
         let pos = self.eval_movement(Movement::ForwardWord(1));
         self.line.replace_range(self.cursor..pos, "");
 
-        self.exit_selection();
-        self.recalculate_completion(cx.editor);
+        self.recalculate_completion(editor);
     }
 
-    pub fn kill_to_start_of_line(&mut self, cx: &Context) {
+    pub fn kill_to_start_of_line(&mut self, editor: &Editor) {
         let pos = self.eval_movement(Movement::StartOfLine);
         self.line.replace_range(pos..self.cursor, "");
         self.cursor = pos;
 
-        self.exit_selection();
-        self.recalculate_completion(cx.editor);
+        self.recalculate_completion(editor);
     }
 
-    pub fn kill_to_end_of_line(&mut self, cx: &Context) {
+    pub fn kill_to_end_of_line(&mut self, editor: &Editor) {
         let pos = self.eval_movement(Movement::EndOfLine);
         self.line.replace_range(self.cursor..pos, "");
 
-        self.exit_selection();
-        self.recalculate_completion(cx.editor);
+        self.recalculate_completion(editor);
     }
 
-    pub fn clear(&mut self, cx: &Context) {
+    pub fn clear(&mut self, editor: &Editor) {
         self.line.clear();
         self.cursor = 0;
-        self.recalculate_completion(cx.editor);
-        self.exit_selection();
+        self.recalculate_completion(editor);
     }
 
-    pub fn change_history(&mut self, register: &[String], direction: CompletionDirection) {
+    pub fn change_history(
+        &mut self,
+        cx: &mut Context,
+        register: char,
+        direction: CompletionDirection,
+    ) {
+        let register = cx.editor.registers.get_mut(register).read();
+
         if register.is_empty() {
             return;
         }
@@ -313,6 +315,7 @@ impl Prompt {
         self.history_pos = Some(index);
 
         self.move_end();
+        self.recalculate_completion(cx.editor);
     }
 
     pub fn change_completion_selection(&mut self, direction: CompletionDirection) {
@@ -490,16 +493,18 @@ impl Component for Prompt {
             ctrl!('f') | key!(Right) => self.move_cursor(Movement::ForwardChar(1)),
             ctrl!('e') | key!(End) => self.move_end(),
             ctrl!('a') | key!(Home) => self.move_start(),
-            ctrl!('w') | alt!(Backspace) | ctrl!(Backspace) => self.delete_word_backwards(cx),
-            alt!('d') | alt!(Delete) | ctrl!(Delete) => self.delete_word_forwards(cx),
-            ctrl!('k') => self.kill_to_end_of_line(cx),
-            ctrl!('u') => self.kill_to_start_of_line(cx),
+            ctrl!('w') | alt!(Backspace) | ctrl!(Backspace) => {
+                self.delete_word_backwards(cx.editor)
+            }
+            alt!('d') | alt!(Delete) | ctrl!(Delete) => self.delete_word_forwards(cx.editor),
+            ctrl!('k') => self.kill_to_end_of_line(cx.editor),
+            ctrl!('u') => self.kill_to_start_of_line(cx.editor),
             ctrl!('h') | key!(Backspace) => {
-                self.delete_char_backwards(cx);
+                self.delete_char_backwards(cx.editor);
                 (self.callback_fn)(cx, &self.line, PromptEvent::Update);
             }
             ctrl!('d') | key!(Delete) => {
-                self.delete_char_forwards(cx);
+                self.delete_char_forwards(cx.editor);
                 (self.callback_fn)(cx, &self.line, PromptEvent::Update);
             }
             ctrl!('s') => {
@@ -516,14 +521,13 @@ impl Component for Prompt {
                 );
                 let line = text.slice(range.from()..range.to()).to_string();
                 if !line.is_empty() {
-                    self.insert_str(line.as_str());
+                    self.insert_str(line.as_str(), cx.editor);
                     (self.callback_fn)(cx, &self.line, PromptEvent::Update);
                 }
             }
             key!(Enter) => {
                 if self.selection.is_some() && self.line.ends_with(std::path::MAIN_SEPARATOR) {
                     self.recalculate_completion(cx.editor);
-                    self.exit_selection();
                 } else {
                     // handle executing with last command in history if nothing entered
                     let input: Cow<str> = if self.line.is_empty() {
@@ -548,15 +552,13 @@ impl Component for Prompt {
             }
             ctrl!('p') | key!(Up) => {
                 if let Some(register) = self.history_register {
-                    let register = cx.editor.registers.get_mut(register);
-                    self.change_history(register.read(), CompletionDirection::Backward);
+                    self.change_history(cx, register, CompletionDirection::Backward);
                     (self.callback_fn)(cx, &self.line, PromptEvent::Update);
                 }
             }
             ctrl!('n') | key!(Down) => {
                 if let Some(register) = self.history_register {
-                    let register = cx.editor.registers.get_mut(register);
-                    self.change_history(register.read(), CompletionDirection::Forward);
+                    self.change_history(cx, register, CompletionDirection::Forward);
                     (self.callback_fn)(cx, &self.line, PromptEvent::Update);
                 }
             }
@@ -565,7 +567,6 @@ impl Component for Prompt {
                 // if single completion candidate is a directory list content in completion
                 if self.completion.len() == 1 && self.line.ends_with(std::path::MAIN_SEPARATOR) {
                     self.recalculate_completion(cx.editor);
-                    self.exit_selection();
                 }
                 (self.callback_fn)(cx, &self.line, PromptEvent::Update)
             }
@@ -597,8 +598,8 @@ impl Component for Prompt {
                             .read(c)
                             .and_then(|r| r.first())
                             .map_or("", |r| r.as_str()),
+                        context.editor,
                     );
-                    prompt.recalculate_completion(context.editor);
                 }));
                 (self.callback_fn)(cx, &self.line, PromptEvent::Update);
                 return EventResult::Consumed(None);

helix-term/tests/integration.rs

@@ -21,5 +21,6 @@ mod test {
     mod auto_pairs;
     mod commands;
     mod movement;
+    mod prompt;
     mod write;
 }

helix-term/tests/test/prompt.rs

@@ -0,0 +1,18 @@
+use super::*;
+
+use helix_term::application::Application;
+
+#[tokio::test]
+async fn test_history_completion() -> anyhow::Result<()> {
+    test_key_sequence(
+        &mut Application::new(Args::default(), Config::default())?,
+        Some(":asdf<ret>:theme d<C-n><tab>"),
+        Some(&|app| {
+            assert!(!app.editor.is_err());
+        }),
+        false,
+    )
+    .await?;
+
+    Ok(())
+}