void RotationViewportAnchor::computeOrigins(
const FloatSize& innerSize,
IntPoint& mainFrameOffset,
FloatPoint& visualViewportOffset) const {
IntSize outerSize = layoutViewport().visibleContentRect().size();
// Compute the viewport origins in CSS pixels relative to the document.
FloatSize absVisualViewportOffset = m_normalizedVisualViewportOffset;
absVisualViewportOffset.scale(outerSize.width(), outerSize.height());
FloatPoint innerOrigin = getInnerOrigin(innerSize);
FloatPoint outerOrigin = innerOrigin - absVisualViewportOffset;
IntRect outerRect = IntRect(flooredIntPoint(outerOrigin), outerSize);
FloatRect innerRect = FloatRect(innerOrigin, innerSize);
moveToEncloseRect(outerRect, innerRect);
outerRect.setLocation(IntPoint(
layoutViewport().clampScrollOffset(toIntSize(outerRect.location()))));
moveIntoRect(innerRect, outerRect);
mainFrameOffset = outerRect.location();
visualViewportOffset =
FloatPoint(innerRect.location() - outerRect.location());
}
void ViewportAnchor::computeOrigins(const FrameView& frameView, const FloatSize& innerSize,
IntPoint& mainFrameOffset, FloatPoint& pinchViewportOffset) const
{
IntSize outerSize = frameView.visibleContentRect().size();
// Compute the viewport origins in CSS pixels relative to the document.
FloatSize absPinchViewportOffset = m_normalizedPinchViewportOffset;
absPinchViewportOffset.scale(outerSize.width(), outerSize.height());
FloatPoint innerOrigin = getInnerOrigin(innerSize);
FloatPoint outerOrigin = innerOrigin - absPinchViewportOffset;
IntRect outerRect = IntRect(flooredIntPoint(outerOrigin), outerSize);
FloatRect innerRect = FloatRect(innerOrigin, innerSize);
moveToEncloseRect(outerRect, innerRect);
outerRect.setLocation(frameView.adjustScrollPositionWithinRange(outerRect.location()));
moveIntoRect(innerRect, outerRect);
mainFrameOffset = outerRect.location();
pinchViewportOffset = FloatPoint(innerRect.location() - outerRect.location());
}