add <C-h>, <C-u>, <C-d>, Delete in prompt mode (#1034)

book/src/keymap.md

@@ -274,8 +274,10 @@ Keys to use within prompt, Remapping currently not supported.
 | `Ctrl-e`, `End`         | move prompt end                                                         |
 | `Ctrl-a`, `Home`        | move prompt start                                                       |
 | `Ctrl-w`                | delete previous word                                                    |
+| `Ctrl-u`                | delete to start of line                                                 |
 | `Ctrl-k`                | delete to end of line                                                   |
-| `backspace`             | delete previous char                                                    |
+| `backspace`, `Ctrl-h`   | delete previous char                                                    |
+| `delete`, `Ctrl-d`      | delete previous char                                                    |
 | `Ctrl-s`                | insert a word under doc cursor, may be changed to Ctrl-r Ctrl-w later   |
 | `Ctrl-p`, `Up`          | select previous history                                                 |
 | `Ctrl-n`, `Down`        | select next history                                                     |

helix-term/src/ui/prompt.rs

@@ -212,6 +212,14 @@ impl Prompt {
         self.completion = (self.completion_fn)(&self.line);
     }
 
+    pub fn delete_char_forwards(&mut self) {
+        let pos = self.eval_movement(Movement::ForwardChar(1));
+        self.line.replace_range(self.cursor..pos, "");
+
+        self.exit_selection();
+        self.completion = (self.completion_fn)(&self.line);
+    }
+
     pub fn delete_word_backwards(&mut self) {
         let pos = self.eval_movement(Movement::BackwardWord(1));
         self.line.replace_range(pos..self.cursor, "");
@@ -221,6 +229,15 @@ impl Prompt {
         self.completion = (self.completion_fn)(&self.line);
     }
 
+    pub fn kill_to_start_of_line(&mut self) {
+        let pos = self.eval_movement(Movement::StartOfLine);
+        self.line.replace_range(pos..self.cursor, "");
+        self.cursor = pos;
+
+        self.exit_selection();
+        self.completion = (self.completion_fn)(&self.line);
+    }
+
     pub fn kill_to_end_of_line(&mut self) {
         let pos = self.eval_movement(Movement::EndOfLine);
         self.line.replace_range(self.cursor..pos, "");
@@ -472,12 +489,31 @@ impl Component for Prompt {
                 modifiers: KeyModifiers::CONTROL,
             } => self.kill_to_end_of_line(),
             KeyEvent {
+                code: KeyCode::Char('u'),
+                modifiers: KeyModifiers::CONTROL,
+            } => self.kill_to_start_of_line(),
+            KeyEvent {
+                code: KeyCode::Char('h'),
+                modifiers: KeyModifiers::CONTROL,
+            }
+            | KeyEvent {
                 code: KeyCode::Backspace,
                 modifiers: KeyModifiers::NONE,
             } => {
                 self.delete_char_backwards();
                 (self.callback_fn)(cx, &self.line, PromptEvent::Update);
             }
+            KeyEvent {
+                code: KeyCode::Char('d'),
+                modifiers: KeyModifiers::CONTROL,
+            }
+            | KeyEvent {
+                code: KeyCode::Delete,
+                modifiers: KeyModifiers::NONE,
+            } => {
+                self.delete_char_forwards();
+                (self.callback_fn)(cx, &self.line, PromptEvent::Update);
+            }
             KeyEvent {
                 code: KeyCode::Char('s'),
                 modifiers: KeyModifiers::CONTROL,