void
nsSVGOuterSVGFrame::NotifyViewportOrTransformChanged(uint32_t aFlags)
{
NS_ABORT_IF_FALSE(aFlags &&
!(aFlags & ~(COORD_CONTEXT_CHANGED | TRANSFORM_CHANGED |
FULL_ZOOM_CHANGED)),
"Unexpected aFlags value");
// No point in doing anything when were not init'ed yet:
if (!mViewportInitialized) {
return;
}
SVGSVGElement *content = static_cast<SVGSVGElement*>(mContent);
if (aFlags & COORD_CONTEXT_CHANGED) {
if (content->HasViewBoxRect()) {
// Percentage lengths on children resolve against the viewBox rect so we
// don't need to notify them of the viewport change, but the viewBox
// transform will have changed, so we need to notify them of that instead.
aFlags = TRANSFORM_CHANGED;
}
else if (content->ShouldSynthesizeViewBox()) {
// In the case of a synthesized viewBox, the synthetic viewBox's rect
// changes as the viewport changes. As a result we need to maintain the
// COORD_CONTEXT_CHANGED flag.
aFlags |= TRANSFORM_CHANGED;
}
else if (mCanvasTM && mCanvasTM->IsSingular()) {
// A width/height of zero will result in us having a singular mCanvasTM
// even when we don't have a viewBox. So we also want to recompute our
// mCanvasTM for this width/height change even though we don't have a
// viewBox.
aFlags |= TRANSFORM_CHANGED;
}
}
bool haveNonFulLZoomTransformChange = (aFlags & TRANSFORM_CHANGED);
if (aFlags & FULL_ZOOM_CHANGED) {
// Convert FULL_ZOOM_CHANGED to TRANSFORM_CHANGED:
aFlags = (aFlags & ~FULL_ZOOM_CHANGED) | TRANSFORM_CHANGED;
}
if (aFlags & TRANSFORM_CHANGED) {
// Make sure our canvas transform matrix gets (lazily) recalculated:
mCanvasTM = nullptr;
if (haveNonFulLZoomTransformChange &&
!(mState & NS_FRAME_IS_NONDISPLAY)) {
uint32_t flags = (mState & NS_FRAME_IN_REFLOW) ?
SVGSVGElement::eDuringReflow : 0;
content->ChildrenOnlyTransformChanged(flags);
}
}
nsSVGUtils::NotifyChildrenOfSVGChange(GetFirstPrincipalChild(), aFlags);
}
