feat: Allow handling of Modifier(s)+Backspace/Delete key combinations on Windows

prompt_toolkit/input/win32.py

@@ -145,7 +145,7 @@ class ConsoleInputReader:
         b"\x1d": Keys.ControlSquareClose,  # Control-]
         b"\x1e": Keys.ControlCircumflex,  # Control-^
         b"\x1f": Keys.ControlUnderscore,  # Control-underscore (Also for Ctrl-hyphen.)
-        b"\x7f": Keys.Backspace,  # (127) Backspace   (ASCII Delete.)
+        b"\x7f": Keys.ControlBackspace,  # (127) Backspace   (ASCII Delete.)
     }
 
     # Keys that don't carry character data.
@@ -347,7 +347,7 @@ def _event_to_key_presses(self, ev: KEY_EVENT_RECORD) -> List[KeyPress]:
             else:
                 result = KeyPress(u_char, u_char)
 
-        # First we handle Shift-Control-Arrow/Home/End (need to do this first)
+        # First we handle Shift-Control-Arrow/Home/End/Ins/Del/PgUp/PgDown/BS (need to do this first)
         if (
             (
                 ev.ControlKeyState & self.LEFT_CTRL_PRESSED
@@ -364,8 +364,10 @@ def _event_to_key_presses(self, ev: KEY_EVENT_RECORD) -> List[KeyPress]:
                 Keys.Home: Keys.ControlShiftHome,
                 Keys.End: Keys.ControlShiftEnd,
                 Keys.Insert: Keys.ControlShiftInsert,
+                Keys.Delete: Keys.ControlShiftDelete,
                 Keys.PageUp: Keys.ControlShiftPageUp,
                 Keys.PageDown: Keys.ControlShiftPageDown,
+                Keys.Backspace: Keys.ControlShiftBackspace,
             }
             result.key = mapping.get(result.key, result.key)
 
@@ -403,6 +405,7 @@ def _event_to_key_presses(self, ev: KEY_EVENT_RECORD) -> List[KeyPress]:
                 Keys.Delete: Keys.ShiftDelete,
                 Keys.PageUp: Keys.ShiftPageUp,
                 Keys.PageDown: Keys.ShiftPageDown,
+                Keys.Backspace: Keys.ShiftBackspace,
             }
             result.key = mapping.get(result.key, result.key)
 

prompt_toolkit/key_binding/bindings/basic.py

@@ -88,6 +88,9 @@ def load_basic_bindings() -> KeyBindings:
     @handle("c-^")
     @handle("c-_")
     @handle("backspace")
+    @handle("s-backspace")
+    @handle("c-backspace")
+    @handle("c-s-backspace")
     @handle("up")
     @handle("down")
     @handle("right")
@@ -103,6 +106,7 @@ def load_basic_bindings() -> KeyBindings:
     @handle("delete")
     @handle("s-delete")
     @handle("c-delete")
+    @handle("c-s-delete")
     @handle("pageup")
     @handle("pagedown")
     @handle("s-tab")
@@ -146,6 +150,9 @@ def _ignore(event: E) -> None:
     handle("backspace", filter=insert_mode, save_before=if_no_repeat)(
         get_by_name("backward-delete-char")
     )
+    handle("c-backspace", filter=insert_mode, save_before=if_no_repeat)(
+        get_by_name("backward-delete-char")
+    )
     handle("delete", filter=insert_mode, save_before=if_no_repeat)(
         get_by_name("delete-char")
     )

prompt_toolkit/key_binding/bindings/emacs.py

@@ -58,6 +58,7 @@ def _esc(event: E) -> None:
     handle("c-a")(get_by_name("beginning-of-line"))
     handle("c-b")(get_by_name("backward-char"))
     handle("c-delete", filter=insert_mode)(get_by_name("kill-word"))
+    handle("c-backspace", filter=insert_mode)(get_by_name("backward-kill-word"))
     handle("c-e")(get_by_name("end-of-line"))
     handle("c-f")(get_by_name("forward-char"))
     handle("c-left")(get_by_name("backward-word"))

prompt_toolkit/keys.py

@@ -75,6 +75,9 @@ class Keys(str, Enum):
     ControlSquareClose = "c-]"
     ControlCircumflex = "c-^"
     ControlUnderscore = "c-_"
+    ControlBackspace = "c-backspace"
+    ShiftBackspace = "s-backspace"
+    ControlShiftBackspace = "c-s-backspace"
 
     Left = "left"
     Right = "right"