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Prevent media-keys bindings from swallowing modifier keys 
This changes how the media-keys manager determines successful
key-bindings from KeyRelease to KeyPress so that it does not conflict
with third-party applications that want to use modifier keys as global
key-bindings. We've already done this change for general keybindings and
marco.

It also cleans up a bunch of deprectation warnings.
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@vkareh @raveit65
vkareh authored and raveit65 committed Mar 12, 2018
1 parent 982a89b commit b5cb3e0
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Showing 2 changed files with 49 additions and 23 deletions.
20 changes: 12 additions & 8 deletions plugins/keybindings/msd-keybindings-manager.c
View file
Expand Up @@ -297,10 +297,12 @@ key_already_used (MsdKeybindingsManager *manager,
static void
binding_unregister_keys (MsdKeybindingsManager *manager)
{
GdkDisplay *dpy;
GSList *li;
gboolean need_flush = FALSE;

gdk_error_trap_push ();
dpy = gdk_display_get_default ();
gdk_x11_display_error_trap_push (dpy);

for (li = manager->priv->binding_list; li != NULL; li = li->next) {
Binding *binding = (Binding *) li->data;
Expand All @@ -312,18 +314,20 @@ binding_unregister_keys (MsdKeybindingsManager *manager)
}

if (need_flush)
gdk_flush ();
gdk_display_flush (dpy);

gdk_error_trap_pop_ignored ();
gdk_x11_display_error_trap_pop_ignored (dpy);
}

static void
binding_register_keys (MsdKeybindingsManager *manager)
{
GSList *li;
GdkDisplay *dpy;
gboolean need_flush = FALSE;

gdk_error_trap_push ();
dpy = gdk_display_get_default ();
gdk_x11_display_error_trap_push (dpy);

/* Now check for changes and grab new key if not already used */
for (li = manager->priv->binding_list; li != NULL; li = li->next) {
Expand Down Expand Up @@ -353,8 +357,8 @@ binding_register_keys (MsdKeybindingsManager *manager)
}

if (need_flush)
gdk_flush ();
if (gdk_error_trap_pop ())
gdk_display_flush (dpy);
if (gdk_x11_display_error_trap_pop (dpy))
g_warning ("Grab failed for some keys, another application may already have access the them.");

}
Expand Down Expand Up @@ -540,11 +544,11 @@ msd_keybindings_manager_start (MsdKeybindingsManager *manager,
(GdkFilterFunc) keybindings_filter,
manager);

gdk_error_trap_push ();
gdk_x11_display_error_trap_push (dpy);
/* Add KeyPressMask to the currently reportable event masks */
XGetWindowAttributes (xdpy, xwindow, &atts);
XSelectInput (xdpy, xwindow, atts.your_event_mask | KeyPressMask);
gdk_error_trap_pop_ignored ();
gdk_x11_display_error_trap_pop_ignored (dpy);

manager->priv->screens = get_screens_list ();

Expand Down
52 changes: 37 additions & 15 deletions plugins/media-keys/msd-media-keys-manager.c
View file
Expand Up @@ -264,11 +264,13 @@ update_kbd_cb (GSettings *settings,
MsdMediaKeysManager *manager)
{
int i;
GdkDisplay *dpy;
gboolean need_flush = TRUE;

g_return_if_fail (settings_key != NULL);

gdk_error_trap_push ();
dpy = gdk_display_get_default ();
gdk_x11_display_error_trap_push (dpy);

/* Find the key that was modified */
for (i = 0; i < HANDLED_KEYS; i++) {
Expand Down Expand Up @@ -313,19 +315,21 @@ update_kbd_cb (GSettings *settings,
}

if (need_flush)
gdk_flush ();
if (gdk_error_trap_pop ())
gdk_display_flush (dpy);
if (gdk_x11_display_error_trap_pop (dpy))
g_warning ("Grab failed for some keys, another application may already have access the them.");
}

static void init_kbd(MsdMediaKeysManager* manager)
{
int i;
GdkDisplay *dpy;
gboolean need_flush = FALSE;

mate_settings_profile_start(NULL);

gdk_error_trap_push();
dpy = gdk_display_get_default ();
gdk_x11_display_error_trap_push (dpy);

for (i = 0; i < HANDLED_KEYS; i++)
{
Expand Down Expand Up @@ -373,10 +377,10 @@ static void init_kbd(MsdMediaKeysManager* manager)

if (need_flush)
{
gdk_flush();
gdk_display_flush (dpy);
}

if (gdk_error_trap_pop ())
if (gdk_x11_display_error_trap_pop (dpy))
{
g_warning("Grab failed for some keys, another application may already have access the them.");
}
Expand Down Expand Up @@ -1057,7 +1061,7 @@ acme_filter_events (GdkXEvent *xevent,
int i;

/* verify we have a key event */
if (xev->type != KeyPress && xev->type != KeyRelease) {
if (xev->type != KeyPress) {
return GDK_FILTER_CONTINUE;
}

Expand All @@ -1071,10 +1075,6 @@ acme_filter_events (GdkXEvent *xevent,
return GDK_FILTER_CONTINUE;
}
break;
default:
if (xev->type != KeyRelease) {
return GDK_FILTER_CONTINUE;
}
}

manager->priv->current_screen = acme_get_screen_from_event (manager, xany);
Expand All @@ -1094,9 +1094,15 @@ static gboolean
start_media_keys_idle_cb (MsdMediaKeysManager *manager)
{
GSList *l;
GdkDisplay *dpy;
Display *xdpy;

g_debug ("Starting media_keys manager");
mate_settings_profile_start (NULL);

dpy = gdk_display_get_default ();
xdpy = GDK_DISPLAY_XDISPLAY (dpy);

manager->priv->volume_monitor = g_volume_monitor_get ();
manager->priv->settings = g_settings_new (BINDING_SCHEMA);

Expand All @@ -1105,14 +1111,28 @@ start_media_keys_idle_cb (MsdMediaKeysManager *manager)

/* Start filtering the events */
for (l = manager->priv->screens; l != NULL; l = l->next) {
GdkWindow *window;
Window xwindow;
XWindowAttributes atts;

mate_settings_profile_start ("gdk_window_add_filter");

window = gdk_screen_get_root_window (l->data);
xwindow = GDK_WINDOW_XID (window);

g_debug ("adding key filter for screen: %d",
gdk_x11_screen_get_screen_number (l->data));

gdk_window_add_filter (gdk_screen_get_root_window (l->data),
gdk_window_add_filter (window,
(GdkFilterFunc)acme_filter_events,
manager);

gdk_x11_display_error_trap_push (dpy);
/* Add KeyPressMask to the currently reportable event masks */
XGetWindowAttributes (xdpy, xwindow, &atts);
XSelectInput (xdpy, xwindow, atts.your_event_mask | KeyPressMask);
gdk_x11_display_error_trap_pop_ignored (dpy);

mate_settings_profile_end ("gdk_window_add_filter");
}

Expand Down Expand Up @@ -1161,6 +1181,7 @@ void
msd_media_keys_manager_stop (MsdMediaKeysManager *manager)
{
MsdMediaKeysManagerPrivate *priv = manager->priv;
GdkDisplay *dpy;
GSList *ls;
GList *l;
int i;
Expand Down Expand Up @@ -1190,7 +1211,8 @@ msd_media_keys_manager_stop (MsdMediaKeysManager *manager)
}

need_flush = FALSE;
gdk_error_trap_push ();
dpy = gdk_display_get_default ();
gdk_x11_display_error_trap_push (dpy);

for (i = 0; i < HANDLED_KEYS; ++i) {
if (keys[i].key) {
Expand All @@ -1204,9 +1226,9 @@ msd_media_keys_manager_stop (MsdMediaKeysManager *manager)
}

if (need_flush)
gdk_flush ();
gdk_display_flush (dpy);

gdk_error_trap_pop_ignored ();
gdk_x11_display_error_trap_pop_ignored (dpy);

g_slist_free (priv->screens);
priv->screens = NULL;
Expand Down

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