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dix: Split ActivatePassiveGrab() from CheckPassiveGrab()

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The changed logic means we don't require the explicit grab = NULL setting
and early exit anymore. Not 100% of it, but if we see that message pop up in
a log we know it's broken.

Signed-off-by: Chase Douglas <chase.douglas@canonical.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Chase Douglas 2011-11-25 13:57:03 -08:00 committed by Peter Hutterer
parent 9ee62cd8ce
commit 80816366aa
2 changed files with 112 additions and 89 deletions
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199
dix/events.c
View File

@ -3634,39 +3634,129 @@ BorderSizeNotEmpty(DeviceIntPtr pDev, WindowPtr pWin)
return FALSE;
}
/**
* Activate the given passive grab. If the grab is activated successfully, the
* event has been delivered to the client.
*
* @param device The device of the event to check.
* @param grab The grab to check.
* @param event The current device event.
*
* @return Whether the grab has been activated.
*/
Bool
ActivatePassiveGrab(DeviceIntPtr device, GrabPtr grab, InternalEvent *event)
{
SpritePtr pSprite = device->spriteInfo->sprite;
GrabInfoPtr grabinfo = &device->deviceGrab;
xEvent *xE = NULL;
int count;
int rc;
if (!GetXIType(event->any.type) && !GetCoreType(event->any.type))
{
ErrorF("Event type %d in CheckPassiveGrabsOnWindow is neither"
" XI 1.x nor core\n", event->any.type);
return FALSE;
}
/* The only consumers of corestate are Xi 1.x and core events, which
* are guaranteed to come from DeviceEvents. */
if (grab->grabtype == GRABTYPE_XI || grab->grabtype == GRABTYPE_CORE)
{
DeviceIntPtr gdev;
event->device_event.corestate &= 0x1f00;
if (grab->grabtype == GRABTYPE_CORE)
gdev = GetMaster(device, KEYBOARD_OR_FLOAT);
else
gdev = grab->modifierDevice;
if (gdev && gdev->key && gdev->key->xkbInfo)
event->device_event.corestate |=
gdev->key->xkbInfo->state.grab_mods & (~0x1f00);
}
if (grab->grabtype == GRABTYPE_CORE)
{
rc = EventToCore(event, &xE, &count);
if (rc != Success)
{
BUG_WARN_MSG(rc != BadMatch,"[dix] %s: core conversion failed"
"(%d, %d).\n", device->name, event->any.type, rc);
return FALSE;
}
} else if (grab->grabtype == GRABTYPE_XI2)
{
rc = EventToXI2(event, &xE);
if (rc != Success)
{
if (rc != BadMatch)
BUG_WARN_MSG(rc != BadMatch,"[dix] %s: XI2 conversion failed"
"(%d, %d).\n", device->name, event->any.type, rc);
return FALSE;
}
count = 1;
} else
{
rc = EventToXI(event, &xE, &count);
if (rc != Success)
{
if (rc != BadMatch)
BUG_WARN_MSG(rc != BadMatch,"[dix] %s: XI conversion failed"
"(%d, %d).\n", device->name, event->any.type, rc);
return FALSE;
}
}
(*grabinfo->ActivateGrab)(device, grab, currentTime, TRUE);
if (xE)
{
FixUpEventFromWindow(pSprite, xE, grab->window, None, TRUE);
/* XXX: XACE? */
TryClientEvents(rClient(grab), device, xE, count,
GetEventFilter(device, xE),
GetEventFilter(device, xE), grab);
}
if (grabinfo->sync.state == FROZEN_NO_EVENT)
{
if (!grabinfo->sync.event)
grabinfo->sync.event = calloc(1, sizeof(DeviceEvent));
*grabinfo->sync.event = event->device_event;
grabinfo->sync.state = FROZEN_WITH_EVENT;
}
free(xE);
return TRUE;
}
/**
* Check an individual grab against an event to determine if a passive grab
* should be activated.
* If activate is true and a passive grab is found, it will be activated, and
* the event will be delivered to the client.
*
* @param device The device of the event to check.
* @param grab The grab to check.
* @param event The current device event.
* @param checkCore Check for core grabs too.
* @param activate Whether to activate a matching grab.
* @param tempGrab A pre-allocated temporary grab record for matching. This
* must have the window and device values filled in.
* @param[out] grab_return The modified value of grab, to be used in the
* caller for grab activation if a this function returns TRUE. May be NULL.
*
* @return Whether the grab matches the event.
*/
static Bool
CheckPassiveGrab(DeviceIntPtr device, GrabPtr grab, InternalEvent *event,
Bool checkCore, Bool activate, GrabPtr tempGrab, GrabPtr *grab_return)
Bool checkCore, GrabPtr tempGrab)
{
static const int CORE_MATCH = 0x1;
static const int XI_MATCH = 0x2;
static const int XI2_MATCH = 0x4;
SpritePtr pSprite = device->spriteInfo->sprite;
GrabInfoPtr grabinfo;
DeviceIntPtr gdev;
XkbSrvInfoPtr xkbi = NULL;
xEvent *xE = NULL;
int match = 0;
int count;
int rc;
gdev = grab->modifierDevice;
if (grab->grabtype == GRABTYPE_CORE)
@ -3715,8 +3805,6 @@ CheckPassiveGrab(DeviceIntPtr device, GrabPtr grab, InternalEvent *event,
!BorderSizeNotEmpty(device, grab->confineTo))))
return FALSE;
*grab_return = grab;
grabinfo = &device->deviceGrab;
/* In some cases a passive core grab may exist, but the client
* already has a core grab on some other device. In this case we
* must not get the grab, otherwise we may never ungrab the
@ -3759,79 +3847,6 @@ CheckPassiveGrab(DeviceIntPtr device, GrabPtr grab, InternalEvent *event,
return FALSE;
}
if (!activate)
return TRUE;
else if (!GetXIType(event->any.type) && !GetCoreType(event->any.type))
{
ErrorF("Event type %d in CheckPassiveGrabsOnWindow is neither"
" XI 1.x nor core\n", event->any.type);
*grab_return = NULL;
return TRUE;
}
/* The only consumers of corestate are Xi 1.x and core events, which
* are guaranteed to come from DeviceEvents. */
if (match & (XI_MATCH | CORE_MATCH))
{
event->device_event.corestate &= 0x1f00;
event->device_event.corestate |= tempGrab->modifiersDetail.exact &
(~0x1f00);
}
if (match & CORE_MATCH)
{
rc = EventToCore(event, &xE, &count);
if (rc != Success)
{
if (rc != BadMatch)
ErrorF("[dix] %s: core conversion failed in CPGFW "
"(%d, %d).\n", device->name, event->any.type, rc);
return TRUE;
}
} else if (match & XI2_MATCH)
{
rc = EventToXI2(event, &xE);
if (rc != Success)
{
if (rc != BadMatch)
ErrorF("[dix] %s: XI2 conversion failed in CPGFW "
"(%d, %d).\n", device->name, event->any.type, rc);
return TRUE;
}
count = 1;
} else
{
rc = EventToXI(event, &xE, &count);
if (rc != Success)
{
if (rc != BadMatch)
ErrorF("[dix] %s: XI conversion failed in CPGFW "
"(%d, %d).\n", device->name, event->any.type, rc);
return TRUE;
}
}
(*grabinfo->ActivateGrab)(device, grab, currentTime, TRUE);
if (xE)
{
FixUpEventFromWindow(pSprite, xE, grab->window, None, TRUE);
/* XXX: XACE? */
TryClientEvents(rClient(grab), device, xE, count,
GetEventFilter(device, xE),
GetEventFilter(device, xE), grab);
}
if (grabinfo->sync.state == FROZEN_NO_EVENT)
{
if (!grabinfo->sync.event)
grabinfo->sync.event = calloc(1, sizeof(DeviceEvent));
*grabinfo->sync.event = event->device_event;
grabinfo->sync.state = FROZEN_WITH_EVENT;
}
free(xE);
return TRUE;
}
@ -3887,9 +3902,15 @@ CheckPassiveGrabsOnWindow(
tempGrab->next = NULL;
for (; grab; grab = grab->next)
if (CheckPassiveGrab(device, grab, event, checkCore, activate,
tempGrab, &grab))
break;
{
if (!CheckPassiveGrab(device, grab, event, checkCore, tempGrab))
continue;
if (activate && !ActivatePassiveGrab(device, grab, event))
continue;
break;
}
FreeGrab(tempGrab);
return grab;

2
include/input.h
View File

@ -548,6 +548,8 @@ void FixUpEventFromWindow(SpritePtr pSprite,
extern WindowPtr XYToWindow(SpritePtr pSprite, int x, int y);
extern int EventIsDeliverable(DeviceIntPtr dev, InternalEvent* event,
WindowPtr win);
extern Bool ActivatePassiveGrab(DeviceIntPtr dev, GrabPtr grab,
InternalEvent *ev);
/**
* Masks specifying the type of event to deliver for an InternalEvent; used
* by EventIsDeliverable.