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Be more careful with private event data

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When copying allocated events, also copy the source device.
When synthesizing double or triple clicks, copy the original
button press event including device information.

https://bugzilla.gnome.org/show_bug.cgi?id=639822
This commit is contained in:
Matthias Clasen 2011-01-19 22:52:55 -05:00
parent 6869ff26f3
commit 99812be7d7
1 changed files with 37 additions and 34 deletions
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71
gdk/gdkevents.c
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@ -503,9 +503,9 @@ gdk_event_copy (const GdkEvent *event)
{
GdkEventPrivate *new_private;
GdkEvent *new_event;
g_return_val_if_fail (event != NULL, NULL);
new_event = gdk_event_new (GDK_NOTHING);
new_private = (GdkEventPrivate *)new_event;
@ -519,21 +519,22 @@ gdk_event_copy (const GdkEvent *event)
new_private->screen = private->screen;
new_private->device = private->device;
new_private->source_device = private->source_device;
}
switch (event->any.type)
{
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
new_event->key.string = g_strdup (event->key.string);
break;
case GDK_ENTER_NOTIFY:
case GDK_LEAVE_NOTIFY:
if (event->crossing.subwindow != NULL)
g_object_ref (event->crossing.subwindow);
g_object_ref (event->crossing.subwindow);
break;
case GDK_DRAG_ENTER:
case GDK_DRAG_LEAVE:
case GDK_DRAG_MOTION:
@ -542,28 +543,28 @@ gdk_event_copy (const GdkEvent *event)
case GDK_DROP_FINISHED:
g_object_ref (event->dnd.context);
break;
case GDK_EXPOSE:
case GDK_DAMAGE:
if (event->expose.region)
new_event->expose.region = cairo_region_copy (event->expose.region);
new_event->expose.region = cairo_region_copy (event->expose.region);
break;
case GDK_SETTING:
new_event->setting.name = g_strdup (new_event->setting.name);
break;
case GDK_BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
if (event->button.axes)
new_event->button.axes = g_memdup (event->button.axes,
if (event->button.axes)
new_event->button.axes = g_memdup (event->button.axes,
sizeof (gdouble) * gdk_device_get_n_axes (event->button.device));
break;
case GDK_MOTION_NOTIFY:
if (event->motion.axes)
new_event->motion.axes = g_memdup (event->motion.axes,
sizeof (gdouble) * gdk_device_get_n_axes (event->motion.device));
if (event->motion.axes)
new_event->motion.axes = g_memdup (event->motion.axes,
sizeof (gdouble) * gdk_device_get_n_axes (event->motion.device));
break;
default:
@ -1129,9 +1130,10 @@ gdk_event_get_device (const GdkEvent *event)
* @event: a #GdkEvent
* @device: a #GdkDevice
*
* Sets the slave device for @event to @device. The event
* must have been allocated by GTK+, for instance, by
* gdk_event_copy().
* Sets the slave device for @event to @device.
*
* The event must have been allocated by GTK+,
* for instance by gdk_event_copy().
*
* Since: 3.0
**/
@ -1153,15 +1155,17 @@ gdk_event_set_source_device (GdkEvent *event,
* gdk_event_get_source_device:
* @event: a #GdkEvent
*
* This function returns the hardware (slave) #GdkDevice that has triggered the event,
* falling back to the virtual (master) device (as in gdk_event_get_device()) if the
* event wasn't caused by interaction with a hardware device. This may happen for
* example in synthesized crossing events after a #GdkWindow updates its geometry or
* a grab is acquired/released.
* This function returns the hardware (slave) #GdkDevice that has
* triggered the event, falling back to the virtual (master) device
* (as in gdk_event_get_device()) if the event wasn't caused by
* interaction with a hardware device. This may happen for example
* in synthesized crossing events after a #GdkWindow updates its
* geometry or a grab is acquired/released.
*
* If the event does not contain device field, this function will return %NULL.
* If the event does not contain a device field, this function will
* return %NULL.
*
* Returns: a #GdkDevice, or %NULL.
* Returns: a #GdkDevice, or %NULL
*
* Since: 3.0
**/
@ -1189,6 +1193,7 @@ gdk_event_get_source_device (const GdkEvent *event)
* @event: a valid #GdkEvent
*
* Request more motion notifies if @event is a motion notify hint event.
*
* This function should be used instead of gdk_window_get_pointer() to
* request further motion notifies, because it also works for extension
* events where motion notifies are provided for devices other than the
@ -1196,7 +1201,7 @@ gdk_event_get_source_device (const GdkEvent *event)
* motion events from a %GDK_MOTION_NOTIFY event usually works like this:
*
* |[
* {
* {
* /* motion_event handler */
* x = motion_event->x;
* y = motion_event->y;
@ -1450,19 +1455,15 @@ gdk_get_show_events (void)
static void
gdk_synthesize_click (GdkDisplay *display,
GdkEvent *event,
gint nclicks)
GdkEvent *event,
gint nclicks)
{
GdkEvent temp_event;
GdkEvent *event_copy;
GList *link;
g_return_if_fail (event != NULL);
temp_event = *event;
temp_event.type = (nclicks == 2) ? GDK_2BUTTON_PRESS : GDK_3BUTTON_PRESS;
event_copy = gdk_event_copy (&temp_event);
event_copy = gdk_event_copy (event);
event_copy->type = (nclicks == 2) ? GDK_2BUTTON_PRESS : GDK_3BUTTON_PRESS;
link = _gdk_event_queue_append (display, event_copy);
}
@ -1472,6 +1473,8 @@ _gdk_event_button_generate (GdkDisplay *display,
{
GdkMultipleClickInfo *info;
g_return_if_fail (event->type == GDK_BUTTON_PRESS);
info = g_hash_table_lookup (display->multiple_click_info, event->button.device);
if (G_UNLIKELY (!info))