NS_IMETHODIMP
nsSVGInnerSVGFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
if (aNameSpaceID == kNameSpaceID_None &&
!(GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD)) {
SVGSVGElement* content = static_cast<SVGSVGElement*>(mContent);
if (aAttribute == nsGkAtoms::width ||
aAttribute == nsGkAtoms::height) {
nsSVGEffects::InvalidateRenderingObservers(this);
nsSVGUtils::ScheduleReflowSVG(this);
if (content->HasViewBoxOrSyntheticViewBox()) {
// make sure our cached transform matrix gets (lazily) updated
mCanvasTM = nullptr;
content->ChildrenOnlyTransformChanged();
nsSVGUtils::NotifyChildrenOfSVGChange(this, TRANSFORM_CHANGED);
} else {
uint32_t flags = COORD_CONTEXT_CHANGED;
if (mCanvasTM && mCanvasTM->IsSingular()) {
mCanvasTM = nullptr;
flags |= TRANSFORM_CHANGED;
}
nsSVGUtils::NotifyChildrenOfSVGChange(this, flags);
}
} else if (aAttribute == nsGkAtoms::transform ||
aAttribute == nsGkAtoms::preserveAspectRatio ||
aAttribute == nsGkAtoms::viewBox ||
aAttribute == nsGkAtoms::x ||
aAttribute == nsGkAtoms::y) {
// make sure our cached transform matrix gets (lazily) updated
mCanvasTM = nullptr;
nsSVGUtils::NotifyChildrenOfSVGChange(
this, aAttribute == nsGkAtoms::viewBox ?
TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED : TRANSFORM_CHANGED);
if (aAttribute == nsGkAtoms::x || aAttribute == nsGkAtoms::y) {
nsSVGEffects::InvalidateRenderingObservers(this);
nsSVGUtils::ScheduleReflowSVG(this);
} else if (aAttribute == nsGkAtoms::transform) {
nsSVGUtils::InvalidateBounds(this, false);
nsSVGUtils::ScheduleReflowSVG(this);
} else if (aAttribute == nsGkAtoms::viewBox ||
(aAttribute == nsGkAtoms::preserveAspectRatio &&
content->HasViewBoxOrSyntheticViewBox())) {
nsSVGUtils::InvalidateBounds(this, false);
nsSVGUtils::ScheduleReflowSVG(this);
content->ChildrenOnlyTransformChanged();
}
}
}
return NS_OK;
}
bool
nsSVGInnerSVGFrame::HasChildrenOnlyTransform(gfxMatrix *aTransform) const
{
SVGSVGElement *content = static_cast<SVGSVGElement*>(mContent);
if (content->HasViewBoxOrSyntheticViewBox()) {
// XXX Maybe return false if the transform is the identity transform?
if (aTransform) {
*aTransform = content->GetViewBoxTransform();
}
return true;
}
return false;
}
void
nsSVGOuterSVGFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsSVGOuterSVGFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("enter nsSVGOuterSVGFrame::Reflow: availSize=%d,%d",
aReflowState.AvailableWidth(), aReflowState.AvailableHeight()));
NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
aStatus = NS_FRAME_COMPLETE;
aDesiredSize.Width() = aReflowState.ComputedWidth() +
aReflowState.ComputedPhysicalBorderPadding().LeftRight();
aDesiredSize.Height() = aReflowState.ComputedHeight() +
aReflowState.ComputedPhysicalBorderPadding().TopBottom();
NS_ASSERTION(!GetPrevInFlow(), "SVG can't currently be broken across pages.");
SVGSVGElement *svgElem = static_cast<SVGSVGElement*>(mContent);
nsSVGOuterSVGAnonChildFrame *anonKid =
static_cast<nsSVGOuterSVGAnonChildFrame*>(GetFirstPrincipalChild());
if (mState & NS_FRAME_FIRST_REFLOW) {
// Initialize
svgElem->UpdateHasChildrenOnlyTransform();
}
// If our SVG viewport has changed, update our content and notify.
// http://www.w3.org/TR/SVG11/coords.html#ViewportSpace
svgFloatSize newViewportSize(
nsPresContext::AppUnitsToFloatCSSPixels(aReflowState.ComputedWidth()),
nsPresContext::AppUnitsToFloatCSSPixels(aReflowState.ComputedHeight()));
svgFloatSize oldViewportSize = svgElem->GetViewportSize();
uint32_t changeBits = 0;
if (newViewportSize != oldViewportSize) {
// When our viewport size changes, we may need to update the overflow rects
// of our child frames. This is the case if:
//
// * We have a real/synthetic viewBox (a children-only transform), since
// the viewBox transform will change as the viewport dimensions change.
//
// * We do not have a real/synthetic viewBox, but the last time we
// reflowed (or the last time UpdateOverflow() was called) we did.
//
// We only handle the former case here, in which case we mark all our child
// frames as dirty so that we reflow them below and update their overflow
// rects.
//
// In the latter case, updating of overflow rects is handled for removal of
// real viewBox (the viewBox attribute) in AttributeChanged. Synthetic
// viewBox "removal" (e.g. a document references the same SVG via both an
// <svg:image> and then as a CSS background image (a synthetic viewBox is
// used when painting the former, but not when painting the latter)) is
// handled in SVGSVGElement::FlushImageTransformInvalidation.
//
if (svgElem->HasViewBoxOrSyntheticViewBox()) {
nsIFrame* anonChild = GetFirstPrincipalChild();
anonChild->AddStateBits(NS_FRAME_IS_DIRTY);
for (nsIFrame* child = anonChild->GetFirstPrincipalChild(); child;
child = child->GetNextSibling()) {
child->AddStateBits(NS_FRAME_IS_DIRTY);
}
}
changeBits |= COORD_CONTEXT_CHANGED;
svgElem->SetViewportSize(newViewportSize);
}
if (mFullZoom != PresContext()->GetFullZoom()) {
changeBits |= FULL_ZOOM_CHANGED;
mFullZoom = PresContext()->GetFullZoom();
}
if (changeBits) {
NotifyViewportOrTransformChanged(changeBits);
}
mViewportInitialized = true;
// Now that we've marked the necessary children as dirty, call
// ReflowSVG() or ReflowSVGNonDisplayText() on them, depending
// on whether we are non-display.
mCallingReflowSVG = true;
if (GetStateBits() & NS_FRAME_IS_NONDISPLAY) {
ReflowSVGNonDisplayText(this);
} else {
// Update the mRects and visual overflow rects of all our descendants,
// including our anonymous wrapper kid:
anonKid->AddStateBits(mState & NS_FRAME_IS_DIRTY);
anonKid->ReflowSVG();
NS_ABORT_IF_FALSE(!anonKid->GetNextSibling(),
"We should have one anonymous child frame wrapping our real children");
}
mCallingReflowSVG = false;
// Set our anonymous kid's offset from our border box:
anonKid->SetPosition(GetContentRectRelativeToSelf().TopLeft());
// Including our size in our overflow rects regardless of the value of
// 'background', 'border', etc. makes sure that we usually (when we clip to
// our content area) don't have to keep changing our overflow rects as our
// descendants move about (see perf comment below). Including our size in our
// scrollable overflow rect also makes sure that we scroll if we're too big
// for our viewport.
//
// <svg> never allows scrolling to anything outside its mRect (only panning),
// so we must always keep our scrollable overflow set to our size.
//
// With regards to visual overflow, we always clip root-<svg> (see our
// BuildDisplayList method) regardless of the value of the 'overflow'
// property since that is per-spec, even for the initial 'visible' value. For
// that reason there's no point in adding descendant visual overflow to our
// own when this frame is for a root-<svg>. That said, there's also a very
// good performance reason for us wanting to avoid doing so. If we did, then
// the frame's overflow would often change as descendants that are partially
// or fully outside its rect moved (think animation on/off screen), and that
// would cause us to do a full NS_FRAME_IS_DIRTY reflow and repaint of the
// entire document tree each such move (see bug 875175).
//
// So it's only non-root outer-<svg> that has the visual overflow of its
// descendants added to its own. (Note that the default user-agent style
// sheet makes 'hidden' the default value for :not(root(svg)), so usually
// FinishAndStoreOverflow will still clip this back to the frame's rect.)
//
// WARNING!! Keep UpdateBounds below in sync with whatever we do for our
// overflow rects here! (Again, see bug 875175.)
//
aDesiredSize.SetOverflowAreasToDesiredBounds();
if (!mIsRootContent) {
aDesiredSize.mOverflowAreas.VisualOverflow().UnionRect(
aDesiredSize.mOverflowAreas.VisualOverflow(),
anonKid->GetVisualOverflowRect() + anonKid->GetPosition());
}
FinishAndStoreOverflow(&aDesiredSize);
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("exit nsSVGOuterSVGFrame::Reflow: size=%d,%d",
aDesiredSize.Width(), aDesiredSize.Height()));
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
}
nsresult
nsSVGInnerSVGFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
if (aNameSpaceID == kNameSpaceID_None &&
!(GetStateBits() & NS_FRAME_IS_NONDISPLAY)) {
SVGSVGElement* content = static_cast<SVGSVGElement*>(mContent);
if (aAttribute == nsGkAtoms::width ||
aAttribute == nsGkAtoms::height) {
nsSVGEffects::InvalidateRenderingObservers(this);
nsSVGUtils::ScheduleReflowSVG(this);
if (content->HasViewBoxOrSyntheticViewBox()) {
// make sure our cached transform matrix gets (lazily) updated
mCanvasTM = nullptr;
content->ChildrenOnlyTransformChanged();
nsSVGUtils::NotifyChildrenOfSVGChange(this, TRANSFORM_CHANGED);
} else {
uint32_t flags = COORD_CONTEXT_CHANGED;
if (mCanvasTM && mCanvasTM->IsSingular()) {
mCanvasTM = nullptr;
flags |= TRANSFORM_CHANGED;
}
nsSVGUtils::NotifyChildrenOfSVGChange(this, flags);
}
} else if (aAttribute == nsGkAtoms::transform ||
aAttribute == nsGkAtoms::preserveAspectRatio ||
aAttribute == nsGkAtoms::viewBox ||
aAttribute == nsGkAtoms::x ||
aAttribute == nsGkAtoms::y) {
// make sure our cached transform matrix gets (lazily) updated
mCanvasTM = nullptr;
nsSVGUtils::NotifyChildrenOfSVGChange(
this, aAttribute == nsGkAtoms::viewBox ?
TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED : TRANSFORM_CHANGED);
// We don't invalidate for transform changes (the layers code does that).
// Also note that SVGTransformableElement::GetAttributeChangeHint will
// return nsChangeHint_UpdateOverflow for "transform" attribute changes
// and cause DoApplyRenderingChangeToTree to make the SchedulePaint call.
if (aAttribute == nsGkAtoms::x || aAttribute == nsGkAtoms::y) {
nsSVGEffects::InvalidateRenderingObservers(this);
nsSVGUtils::ScheduleReflowSVG(this);
} else if (aAttribute == nsGkAtoms::viewBox ||
(aAttribute == nsGkAtoms::preserveAspectRatio &&
content->HasViewBoxOrSyntheticViewBox())) {
content->ChildrenOnlyTransformChanged();
// SchedulePaint sets a global state flag so we only need to call it once
// (on ourself is fine), not once on each child (despite bug 828240).
SchedulePaint();
}
}
}
return NS_OK;
}