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key controller: Don't eat modifier events

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The key controller was consuming key events
for modifier keys, for no entirely convincing
reason, which leads to problems when somebody
actually listens for those, such as the simple
input method does for C-S-u processing.

(cherry-picked from 91d6893f02)

Closes: https://gitlab.gnome.org/GNOME/gtk/issues/1884
This commit is contained in:
Matthias Clasen 2019-05-13 17:01:51 +00:00 committed by Carlos Garnacho
parent da90d37b42
commit ffaf56d1c6
1 changed files with 8 additions and 14 deletions
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22
gtk/gtkeventcontrollerkey.c
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@ -47,6 +47,8 @@ struct _GtkEventControllerKey
GtkIMContext *im_context;
GHashTable *pressed_keys;
GdkModifierType state;
const GdkEvent *current_event;
};
@ -87,10 +89,10 @@ gtk_event_controller_key_handle_event (GtkEventController *controller,
{
GtkEventControllerKey *key = GTK_EVENT_CONTROLLER_KEY (controller);
GdkEventType event_type = gdk_event_get_event_type (event);
gboolean handled;
GdkModifierType state;
guint16 keycode;
guint keyval;
gboolean handled = FALSE;
if (event_type == GDK_FOCUS_CHANGE)
{
@ -112,23 +114,15 @@ gtk_event_controller_key_handle_event (GtkEventController *controller,
return TRUE;
}
if (!gdk_event_get_state (event, &state) || !event->key.is_modifier)
return FALSE;
key->current_event = event;
if (event->key.is_modifier)
gdk_event_get_state (event, &state);
if (key->state != state)
{
if (event_type == GDK_KEY_PRESS)
g_signal_emit (controller, signals[MODIFIERS], 0, state, &handled);
else
handled = TRUE;
gboolean unused;
if (handled == TRUE)
{
key->current_event = NULL;
return TRUE;
}
key->state = state;
g_signal_emit (controller, signals[MODIFIERS], 0, state, &unused);
}
gdk_event_get_keycode (event, &keycode);