bool CachedNode::Clip(const WebCore::IntRect& outer, WebCore::IntRect* inner,
WTF::Vector<WebCore::IntRect>* rings)
{
if (outer.contains(*inner))
return true;
// DBG_NAV_LOGD("outer:{%d,%d,%d,%d} does not contain inner:{%d,%d,%d,%d}",
// outer.x(), outer.y(), outer.width(), outer.height(),
// inner->x(), inner->y(), inner->width(), inner->height());
bool intersects = outer.intersects(*inner);
size_t size = intersects ? rings->size() : 0;
*inner = WebCore::IntRect(0, 0, 0, 0);
if (intersects) {
WebCore::IntRect * const start = rings->begin();
WebCore::IntRect* ring = start + size - 1;
do {
ring->intersect(outer);
if (ring->isEmpty()) {
if ((size_t) (ring - start) != --size)
*ring = start[size];
} else
inner->unite(*ring);
} while (ring-- != start);
}
rings->shrink(size);
// DBG_NAV_LOGD("size:%d", size);
return size != 0;
}
void WebPageCompositorPrivate::findFixedElementRect(LayerCompositingThread* layer, WebCore::IntRect& fixedElementRect)
{
if ((layer->hasFixedContainer() || layer->isFixedPosition() || layer->hasFixedAncestorInDOMTree()) && layer->layerRenderer()) {
IntRect fixedRect = layer->layerRenderer()->toPixelViewportCoordinates(layer->boundingBox());
// FIXME: It's possible that the rects don't intersect now, but will be connected by a fixed rect found later.
// We need to handle it as well.
if (fixedElementRect.isEmpty() || fixedElementRect.intersects(fixedRect)) // Unite rects if they intersect each other.
fixedElementRect.unite(fixedRect);
else if (fixedRect.y() < fixedElementRect.y()) // Replace the fixedElementRect with fixedRect if fixedRect is above it (closer to top).
fixedElementRect = fixedRect;
}
const Vector<RefPtr<LayerCompositingThread> >& sublayers = layer->sublayers();
for (size_t i = 0; i < sublayers.size(); i++)
findFixedElementRect(sublayers[i].get(), fixedElementRect);
}
void CachedNode::fixUpFocusRects()
{
if (mFixedUpFocusRects)
return;
mFixedUpFocusRects = true;
if (mNavableRects <= 1)
return;
#if DEBUG_NAV_UI
{
WebCore::IntRect* boundsPtr = mFocusRing.begin() - 1;
const WebCore::IntRect* const boundsEnd = mFocusRing.begin() + mFocusRing.size();
while (++boundsPtr < boundsEnd)
LOGD("%s %d:(%d, %d, %d, %d)\n", __FUNCTION__, boundsPtr - mFocusRing.begin(),
boundsPtr->x(), boundsPtr->y(), boundsPtr->width(), boundsPtr->height());
}
#endif
// q: need to know when rects are for drawing and hit-testing, but not mouse down calcs?
bool again;
do {
again = false;
size_t size = mFocusRing.size();
WebCore::IntRect* unitBoundsPtr = mFocusRing.begin() - 1;
const WebCore::IntRect* const unitBoundsEnd = mFocusRing.begin() + size;
while (++unitBoundsPtr < unitBoundsEnd) {
// any other unitBounds to the left or right of this one?
int unitTop = unitBoundsPtr->y();
int unitBottom = unitBoundsPtr->bottom();
int unitLeft = unitBoundsPtr->x();
int unitRight = unitBoundsPtr->right();
WebCore::IntRect* testBoundsPtr = mFocusRing.begin() - 1;
while (++testBoundsPtr < unitBoundsEnd) {
if (unitBoundsPtr == testBoundsPtr)
continue;
int testTop = testBoundsPtr->y();
int testBottom = testBoundsPtr->bottom();
int testLeft = testBoundsPtr->x();
int testRight = testBoundsPtr->right();
int candidateTop = unitTop > testTop ? unitTop : testTop;
int candidateBottom = unitBottom < testBottom ? unitBottom : testBottom;
int candidateLeft = unitRight < testLeft ? unitRight : testRight;
int candidateRight = unitRight > testLeft ? unitLeft : testLeft;
bool leftRight = true;
if (candidateTop + OVERLAP >= candidateBottom ||
candidateLeft + OVERLAP >= candidateRight) {
candidateTop = unitBottom < testTop ? unitBottom : testBottom;
candidateBottom = unitBottom > testTop ? unitTop : testTop;
candidateLeft = unitLeft > testLeft ? unitLeft : testLeft;
candidateRight = unitRight < testRight ? unitRight : testRight;
if (candidateTop + OVERLAP >= candidateBottom ||
candidateLeft + OVERLAP >= candidateRight)
continue;
leftRight = false;
}
// construct candidate to add
WebCore::IntRect candidate = WebCore::IntRect(candidateLeft, candidateTop,
candidateRight - candidateLeft, candidateBottom - candidateTop);
// does a different unit bounds intersect the candidate? if so, don't add
WebCore::IntRect* checkBoundsPtr = mFocusRing.begin() - 1;
while (++checkBoundsPtr < unitBoundsEnd) {
if (checkBoundsPtr->intersects(candidate) == false)
continue;
if (leftRight) {
if (candidateTop >= checkBoundsPtr->y() &&
candidateBottom > checkBoundsPtr->bottom())
candidateTop = checkBoundsPtr->bottom();
else if (candidateTop < checkBoundsPtr->y() &&
candidateBottom <= checkBoundsPtr->bottom())
candidateBottom = checkBoundsPtr->y();
else
goto nextCheck;
} else {
if (candidateLeft >= checkBoundsPtr->x() &&
candidateRight > checkBoundsPtr->right())
candidateLeft = checkBoundsPtr->right();
else if (candidateLeft < checkBoundsPtr->x() &&
candidateRight <= checkBoundsPtr->right())
candidateRight = checkBoundsPtr->x();
else
goto nextCheck;
}
}
candidate = WebCore::IntRect(candidateLeft, candidateTop,
candidateRight - candidateLeft, candidateBottom - candidateTop);
ASSERT(candidate.isEmpty() == false);
#if DEBUG_NAV_UI
LOGD("%s %d:(%d, %d, %d, %d)\n", __FUNCTION__, mFocusRing.size(),
candidate.x(), candidate.y(), candidate.width(), candidate.height());
#endif
mFocusRing.append(candidate);
again = true;
goto tryAgain;
nextCheck:
continue;
}
}
tryAgain:
;
} while (again);
}