LibVT/LibLine: Delete words when pressing Ctrl+Backspace in Terminal

2 files changed, 17 insertions, 0 deletions

diff --git a/Userland/Libraries/LibLine/Editor.cpp b/Userland/Libraries/LibLine/Editor.cpp
index 5a5b61bfd6..f81945517f 100644
--- a/Userland/Libraries/LibLine/Editor.cpp
+++ b/Userland/Libraries/LibLine/Editor.cpp
@@ -986,6 +986,12 @@ void Editor::handle_read_event()
             case 'F': // ^[[F: end
                 go_end();
                 continue;
+            case 127:
+                if (modifiers == CSIMod::Ctrl)
+                    erase_alnum_word_backwards();
+                else
+                    erase_character_backwards();
+                continue;
             case '~':
                 if (param1 == 3) { // ^[[3~: delete
                     if (modifiers == CSIMod::Ctrl)
diff --git a/Userland/Libraries/LibVT/Terminal.cpp b/Userland/Libraries/LibVT/Terminal.cpp
index 829bd5ce48..865c532593 100644
--- a/Userland/Libraries/LibVT/Terminal.cpp
+++ b/Userland/Libraries/LibVT/Terminal.cpp
@@ -1378,6 +1378,17 @@ void Terminal::handle_key_press(KeyCode key, u32 code_point, u8 flags)
     case KeyCode::Key_PageDown:
         emit_tilde_with_modifier(6);
         return;
+    case KeyCode::Key_Backspace:
+        if (ctrl) {
+            // This is an extension that allows Editor.cpp to delete whole words when
+            // Ctrl+Backspace is pressed. Ctrl cannot be transmitted without a CSI, and
+            // ANSI delete (127) is within the valid range for CSI codes in Editor.cpp.
+            // The code also has the same behavior as backspace when emitted with no CSI,
+            // though the backspace code (8) is preserved when Ctrl is not pressed.
+            emit_final_with_modifier(127);
+            return;
+        }
+        break;
     case KeyCode::Key_Return:
         // The standard says that CR should be generated by the return key.
         // The TTY will take care of translating it to CR LF for the terminal.