improv: support keypad and uncommon keys (#1274)

Author: Kneemund

crates/rnote-ui/src/canvas/input.rs

@@ -470,23 +470,36 @@ pub(crate) fn retrieve_keyboard_key(gdk_key: gdk::Key) -> KeyboardKey {
     if let Some(keychar) = gdk_key.to_unicode() {
         KeyboardKey::Unicode(keychar).filter_convert_unicode_control_chars()
     } else {
+        // Mapping based on https://developer.mozilla.org/en-US/docs/Web/API/UI_Events/Keyboard_event_key_values
         match gdk_key {
             gdk::Key::BackSpace => KeyboardKey::BackSpace,
             gdk::Key::Tab => KeyboardKey::HorizontalTab,
+            gdk::Key::KP_Tab => KeyboardKey::HorizontalTab,
+            gdk::Key::ISO_Left_Tab => KeyboardKey::HorizontalTab,
             gdk::Key::Linefeed => KeyboardKey::Linefeed,
             gdk::Key::Return => KeyboardKey::CarriageReturn,
+            gdk::Key::KP_Enter => KeyboardKey::CarriageReturn,
+            gdk::Key::ISO_Enter => KeyboardKey::CarriageReturn,
+            gdk::Key::_3270_Enter => KeyboardKey::CarriageReturn,
             gdk::Key::Escape => KeyboardKey::Escape,
             gdk::Key::Delete => KeyboardKey::Delete,
+            gdk::Key::KP_Delete => KeyboardKey::Delete,
             gdk::Key::Down => KeyboardKey::NavDown,
+            gdk::Key::KP_Down => KeyboardKey::NavDown,
             gdk::Key::Up => KeyboardKey::NavUp,
+            gdk::Key::KP_Up => KeyboardKey::NavUp,
             gdk::Key::Left => KeyboardKey::NavLeft,
+            gdk::Key::KP_Left => KeyboardKey::NavLeft,
             gdk::Key::Right => KeyboardKey::NavRight,
+            gdk::Key::KP_Right => KeyboardKey::NavRight,
             gdk::Key::Shift_L => KeyboardKey::ShiftLeft,
             gdk::Key::Shift_R => KeyboardKey::ShiftRight,
             gdk::Key::Control_L => KeyboardKey::CtrlLeft,
             gdk::Key::Control_R => KeyboardKey::CtrlRight,
             gdk::Key::Home => KeyboardKey::Home,
+            gdk::Key::KP_Home => KeyboardKey::Home,
             gdk::Key::End => KeyboardKey::End,
+            gdk::Key::KP_End => KeyboardKey::End,
             _ => KeyboardKey::Unsupported,
         }
     }