bool SVGLayoutSupport::layoutSizeOfNearestViewportChanged(
const LayoutObject* start) {
for (; start; start = start->parent()) {
if (start->isSVGRoot())
return toLayoutSVGRoot(start)->isLayoutSizeChanged();
if (start->isSVGViewportContainer())
return toLayoutSVGViewportContainer(start)->isLayoutSizeChanged();
}
ASSERT_NOT_REACHED();
return false;
}
bool SVGLayoutSupport::transformToRootChanged(LayoutObject* ancestor)
{
while (ancestor && !ancestor->isSVGRoot()) {
if (ancestor->isSVGTransformableContainer())
return toLayoutSVGContainer(ancestor)->didTransformToRootUpdate();
if (ancestor->isSVGViewportContainer())
return toLayoutSVGViewportContainer(ancestor)->didTransformToRootUpdate();
ancestor = ancestor->parent();
}
return false;
}
inline bool SVGLayoutSupport::layoutSizeOfNearestViewportChanged(const LayoutObject* start)
{
while (start && !start->isSVGRoot() && !start->isSVGViewportContainer())
start = start->parent();
ASSERT(start);
ASSERT(start->isSVGRoot() || start->isSVGViewportContainer());
if (start->isSVGViewportContainer())
return toLayoutSVGViewportContainer(start)->isLayoutSizeChanged();
return toLayoutSVGRoot(start)->isLayoutSizeChanged();
}
FloatSize SVGSVGElement::currentViewportSize() const
{
if (!layoutObject())
return FloatSize();
if (layoutObject()->isSVGRoot()) {
LayoutRect contentBoxRect = toLayoutSVGRoot(layoutObject())->contentBoxRect();
return FloatSize(contentBoxRect.width() / layoutObject()->style()->effectiveZoom(), contentBoxRect.height() / layoutObject()->style()->effectiveZoom());
}
FloatRect viewportRect = toLayoutSVGViewportContainer(layoutObject())->viewport();
return FloatSize(viewportRect.width(), viewportRect.height());
}
bool SVGLayoutSupport::screenScaleFactorChanged(const LayoutObject* ancestor)
{
for (; ancestor; ancestor = ancestor->parent()) {
if (ancestor->isSVGRoot())
return toLayoutSVGRoot(ancestor)->didScreenScaleFactorChange();
if (ancestor->isSVGTransformableContainer())
return toLayoutSVGTransformableContainer(ancestor)->didScreenScaleFactorChange();
if (ancestor->isSVGViewportContainer())
return toLayoutSVGViewportContainer(ancestor)->didScreenScaleFactorChange();
}
ASSERT_NOT_REACHED();
return false;
}
