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reorder xkb state handling in wlr_keyboard

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wlr_keyboard manages the xkb-common state of the compositor.
It used to update the state, update the modifiers, then notify the
compositor.
When [Shift_L] was pressed and released, this resulted in an event chain:
  Modifiers: Shift
  Key: Shift_L (Pressed)

  Modifiers:
  Key: Shift_L (Release)

The xkb-docs state that the state should be updated *after* the key was
handled [1], to prevent the new state from influencing the actual key
generated.

To achieve this, the event to the compositor is emitted, *before*
wlroots handles the xkb and internal keyboard state.

With this patch applied, the emitted events ill be:
  Modifiers:
  Key: Shift_L (Pressed)

  Modifiers: Shift
  Key: Shift_L (Release)

[1] https://xkbcommon.org/doc/current/group__state.html#gac554aa20743a621692c1a744a05e06ce
This commit is contained in:
Markus Ongyerth 2018-04-18 11:54:59 +02:00
parent dbdc63ddde
commit c8ccb1bef3
1 changed files with 4 additions and 3 deletions
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7
types/wlr_keyboard.c
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@ -120,6 +120,10 @@ void wlr_keyboard_notify_key(struct wlr_keyboard *keyboard,
if (keyboard->xkb_state == NULL) {
return;
}
keyboard_key_update(keyboard, event);
wlr_signal_emit_safe(&keyboard->events.key, event);
if (event->update_state) {
uint32_t keycode = event->keycode + 8;
xkb_state_update_key(keyboard->xkb_state, keycode,
@ -131,9 +135,6 @@ void wlr_keyboard_notify_key(struct wlr_keyboard *keyboard,
if (updated) {
wlr_signal_emit_safe(&keyboard->events.modifiers, keyboard);
}
keyboard_key_update(keyboard, event);
wlr_signal_emit_safe(&keyboard->events.key, event);
}
void wlr_keyboard_init(struct wlr_keyboard *kb,