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device-manager-xi2: Clamp coordinates of events to the stage coordinates

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The X server can sometimes send us coordinates in the negatives or above
our window in extreme cases. Ensure that the user never sees this.
This commit is contained in:
Jasper St. Pierre 2013-10-07 12:13:41 -04:00 committed by Emmanuele Bassi
parent 1de024b5fa
commit 98e03fc03f
1 changed files with 19 additions and 22 deletions
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41
clutter/x11/clutter-device-manager-xi2.c
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@ -642,6 +642,17 @@ translate_axes (ClutterInputDevice *device,
return retval;
}
static void
translate_coords (ClutterStageX11 *stage_x11,
gdouble event_x,
gdouble event_y,
gfloat *x_out,
gfloat *y_out)
{
*x_out = CLAMP (event_x, 0, stage_x11->xwin_width) / stage_x11->scale_factor;
*y_out = CLAMP (event_y, 0, stage_x11->xwin_height) / stage_x11->scale_factor;
}
static gdouble
scroll_valuators_changed (ClutterInputDevice *device,
XIValuatorState *valuators,
@ -744,7 +755,6 @@ clutter_device_manager_xi2_translate_event (ClutterEventTranslator *translator,
XGenericEventCookie *cookie;
XIEvent *xi_event;
XEvent *xevent;
int window_scale;
backend_x11 = CLUTTER_BACKEND_X11 (clutter_get_default_backend ());
@ -773,11 +783,6 @@ clutter_device_manager_xi2_translate_event (ClutterEventTranslator *translator,
event->any.stage = stage;
if (stage_x11 != NULL)
window_scale = stage_x11->scale_factor;
else
window_scale = 1;
switch (xi_event->evtype)
{
case XI_HierarchyChanged:
@ -932,8 +937,7 @@ clutter_device_manager_xi2_translate_event (ClutterEventTranslator *translator,
event->scroll.stage = stage;
event->scroll.time = xev->time;
event->scroll.x = xev->event_x / window_scale;
event->scroll.y = xev->event_y / window_scale;
translate_coords (stage_x11, xev->event_x, xev->event_y, &event->scroll.x, &event->scroll.y);
_clutter_input_device_xi2_translate_state (event,
&xev->mods,
&xev->buttons,
@ -979,8 +983,7 @@ clutter_device_manager_xi2_translate_event (ClutterEventTranslator *translator,
event->button.stage = stage;
event->button.time = xev->time;
event->button.x = xev->event_x / window_scale;
event->button.y = xev->event_y / window_scale;
translate_coords (stage_x11, xev->event_x, xev->event_y, &event->button.x, &event->button.y);
event->button.button = xev->detail;
_clutter_input_device_xi2_translate_state (event,
&xev->mods,
@ -1061,8 +1064,7 @@ clutter_device_manager_xi2_translate_event (ClutterEventTranslator *translator,
event->scroll.stage = stage;
event->scroll.time = xev->time;
event->scroll.x = xev->event_x / window_scale;
event->scroll.y = xev->event_y / window_scale;
translate_coords (stage_x11, xev->event_x, xev->event_y, &event->scroll.x, &event->scroll.y);
_clutter_input_device_xi2_translate_state (event,
&xev->mods,
&xev->buttons,
@ -1090,8 +1092,7 @@ clutter_device_manager_xi2_translate_event (ClutterEventTranslator *translator,
event->motion.stage = stage;
event->motion.time = xev->time;
event->motion.x = xev->event_x / window_scale;
event->motion.y = xev->event_y / window_scale;
translate_coords (stage_x11, xev->event_x, xev->event_y, &event->motion.x, &event->motion.y);
_clutter_input_device_xi2_translate_state (event,
&xev->mods,
&xev->buttons,
@ -1141,8 +1142,7 @@ clutter_device_manager_xi2_translate_event (ClutterEventTranslator *translator,
event->touch.stage = stage;
event->touch.time = xev->time;
event->touch.x = xev->event_x / window_scale;
event->touch.y = xev->event_y / window_scale;
translate_coords (stage_x11, xev->event_x, xev->event_y, &event->touch.x, &event->touch.y);
_clutter_input_device_xi2_translate_state (event,
&xev->mods,
&xev->buttons,
@ -1196,8 +1196,7 @@ clutter_device_manager_xi2_translate_event (ClutterEventTranslator *translator,
event->touch.stage = stage;
event->touch.time = xev->time;
event->touch.sequence = GUINT_TO_POINTER (xev->detail);
event->touch.x = xev->event_x / window_scale;
event->touch.y = xev->event_y / window_scale;
translate_coords (stage_x11, xev->event_x, xev->event_y, &event->touch.x, &event->touch.y);
clutter_event_set_source_device (event, source_device);
@ -1253,8 +1252,7 @@ clutter_device_manager_xi2_translate_event (ClutterEventTranslator *translator,
event->crossing.related = NULL;
event->crossing.time = xev->time;
event->crossing.x = xev->event_x / window_scale;
event->crossing.y = xev->event_y / window_scale;
translate_coords (stage_x11, xev->event_x, xev->event_y, &event->crossing.x, &event->crossing.y);
_clutter_input_device_set_stage (device, stage);
}
@ -1277,8 +1275,7 @@ clutter_device_manager_xi2_translate_event (ClutterEventTranslator *translator,
event->crossing.related = NULL;
event->crossing.time = xev->time;
event->crossing.x = xev->event_x / window_scale;
event->crossing.y = xev->event_y / window_scale;
translate_coords (stage_x11, xev->event_x, xev->event_y, &event->crossing.x, &event->crossing.y);
_clutter_input_device_set_stage (device, NULL);
}