зеркало из https://github.com/mozilla/gecko-dev.git
1720 строки
54 KiB
C++
1720 строки
54 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// Main header first:
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#include "SVGObserverUtils.h"
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// Keep others in (case-insensitive) order:
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#include "mozilla/dom/CanvasRenderingContext2D.h"
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#include "mozilla/RestyleManager.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsISupportsImpl.h"
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#include "nsSVGClipPathFrame.h"
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#include "nsSVGPaintServerFrame.h"
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#include "nsSVGFilterFrame.h"
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#include "nsSVGMaskFrame.h"
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#include "nsIReflowCallback.h"
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#include "nsCycleCollectionParticipant.h"
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#include "SVGGeometryElement.h"
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#include "SVGTextPathElement.h"
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#include "SVGUseElement.h"
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#include "ImageLoader.h"
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#include "mozilla/net/ReferrerPolicy.h"
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using namespace mozilla::dom;
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static already_AddRefed<URLAndReferrerInfo>
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ResolveURLUsingLocalRef(nsIFrame* aFrame, const css::URLValueData* aURL)
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{
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MOZ_ASSERT(aFrame);
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if (!aURL) {
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return nullptr;
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}
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nsCOMPtr<nsIURI> uri = aURL->GetURI();
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if (aURL->IsLocalRef()) {
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uri = SVGObserverUtils::GetBaseURLForLocalRef(aFrame->GetContent(), uri);
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uri = aURL->ResolveLocalRef(uri);
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}
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if (!uri) {
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return nullptr;
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}
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return do_AddRef(new URLAndReferrerInfo(uri,
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aURL->mExtraData->GetReferrer(),
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aURL->mExtraData->GetReferrerPolicy()));
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}
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namespace mozilla {
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class SVGFilterObserverList;
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/**
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* A class used as a member of the "observer" classes below to help them
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* avoid dereferencing their frame during presshell teardown when their frame
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* may have been destroyed (leaving their pointer to their frame dangling).
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*
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* When a presshell is torn down, the properties for each frame may not be
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* deleted until after the frames are destroyed. "Observer" objects (attached
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* as frame properties) must therefore check whether the presshell is being
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* torn down before using their pointer to their frame.
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*
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* mFramePresShell may be null, but when mFrame is non-null, mFramePresShell
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* is guaranteed to be non-null, too.
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*/
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struct nsSVGFrameReferenceFromProperty
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{
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explicit nsSVGFrameReferenceFromProperty(nsIFrame* aFrame)
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: mFrame(aFrame)
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, mFramePresShell(aFrame->PresShell())
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{}
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// Clear our reference to the frame.
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void Detach() {
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mFrame = nullptr;
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mFramePresShell = nullptr;
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}
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// null if the frame has become invalid
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nsIFrame* Get() {
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if (mFramePresShell && mFramePresShell->IsDestroying()) {
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Detach(); // mFrame is no longer valid.
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}
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return mFrame;
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}
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private:
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// The frame that our property is attached to (may be null).
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nsIFrame* mFrame;
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nsIPresShell* mFramePresShell;
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};
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void
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SVGRenderingObserver::StartObserving()
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{
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Element* target = GetReferencedElementWithoutObserving();
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if (target) {
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target->AddMutationObserver(this);
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}
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}
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void
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SVGRenderingObserver::StopObserving()
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{
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Element* target = GetReferencedElementWithoutObserving();
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if (target) {
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target->RemoveMutationObserver(this);
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if (mInObserverList) {
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SVGObserverUtils::RemoveRenderingObserver(target, this);
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mInObserverList = false;
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}
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}
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NS_ASSERTION(!mInObserverList, "still in an observer list?");
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}
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Element*
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SVGRenderingObserver::GetAndObserveReferencedElement()
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{
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#ifdef DEBUG
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DebugObserverSet();
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#endif
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Element* referencedElement = GetReferencedElementWithoutObserving();
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if (referencedElement && !mInObserverList) {
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SVGObserverUtils::AddRenderingObserver(referencedElement, this);
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mInObserverList = true;
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}
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return referencedElement;
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}
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nsIFrame*
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SVGRenderingObserver::GetAndObserveReferencedFrame()
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{
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Element* referencedElement = GetAndObserveReferencedElement();
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return referencedElement ? referencedElement->GetPrimaryFrame() : nullptr;
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}
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nsIFrame*
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SVGRenderingObserver::GetAndObserveReferencedFrame(LayoutFrameType aFrameType,
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bool* aOK)
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{
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nsIFrame* frame = GetAndObserveReferencedFrame();
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if (frame) {
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if (frame->Type() == aFrameType)
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return frame;
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if (aOK) {
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*aOK = false;
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}
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}
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return nullptr;
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}
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void
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SVGRenderingObserver::OnNonDOMMutationRenderingChange()
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{
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mInObserverList = false;
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OnRenderingChange();
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}
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void
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SVGRenderingObserver::NotifyEvictedFromRenderingObserverSet()
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{
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mInObserverList = false; // We've been removed from rendering-obs. list.
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StopObserving(); // Remove ourselves from mutation-obs. list.
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}
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void
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SVGRenderingObserver::AttributeChanged(dom::Element* aElement,
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int32_t aNameSpaceID,
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nsAtom* aAttribute,
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int32_t aModType,
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const nsAttrValue* aOldValue)
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{
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// An attribute belonging to the element that we are observing *or one of its
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// descendants* has changed.
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//
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// In the case of observing a gradient element, say, we want to know if any
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// of its 'stop' element children change, but we don't actually want to do
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// anything for changes to SMIL element children, for example. Maybe it's not
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// worth having logic to optimize for that, but in most cases it could be a
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// small check?
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//
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// XXXjwatt: do we really want to blindly break the link between our
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// observers and ourselves for all attribute changes? For non-ID changes
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// surely that is unnecessary.
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OnRenderingChange();
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}
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void
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SVGRenderingObserver::ContentAppended(nsIContent* aFirstNewContent)
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{
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OnRenderingChange();
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}
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void
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SVGRenderingObserver::ContentInserted(nsIContent* aChild)
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{
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OnRenderingChange();
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}
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void
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SVGRenderingObserver::ContentRemoved(nsIContent* aChild,
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nsIContent* aPreviousSibling)
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{
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OnRenderingChange();
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}
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/**
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* SVG elements reference supporting resources by element ID. We need to
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* track when those resources change and when the document changes in ways
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* that affect which element is referenced by a given ID (e.g., when
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* element IDs change). The code here is responsible for that.
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*
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* When a frame references a supporting resource, we create a property
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* object derived from SVGIDRenderingObserver to manage the relationship. The
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* property object is attached to the referencing frame.
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*/
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class SVGIDRenderingObserver : public SVGRenderingObserver
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{
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public:
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SVGIDRenderingObserver(URLAndReferrerInfo* aURI, nsIContent* aObservingContent,
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bool aReferenceImage);
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protected:
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virtual ~SVGIDRenderingObserver() {
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// This needs to call our GetReferencedElementWithoutObserving override,
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// so must be called here rather than in our base class's dtor.
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StopObserving();
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}
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Element* GetReferencedElementWithoutObserving() final {
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return mObservedElementTracker.get();
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}
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void OnRenderingChange() override;
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/**
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* Helper that provides a reference to the element with the ID that our
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* observer wants to observe, and that will invalidate our observer if the
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* element that that ID identifies changes to a different element (or none).
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*/
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class ElementTracker final : public IDTracker
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{
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public:
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explicit ElementTracker(SVGIDRenderingObserver* aOwningObserver)
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: mOwningObserver(aOwningObserver)
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{}
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protected:
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void ElementChanged(Element* aFrom, Element* aTo) override {
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mOwningObserver->StopObserving(); // stop observing the old element
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IDTracker::ElementChanged(aFrom, aTo);
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mOwningObserver->StartObserving(); // start observing the new element
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mOwningObserver->OnRenderingChange();
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}
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/**
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* Override IsPersistent because we want to keep tracking the element
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* for the ID even when it changes.
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*/
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bool IsPersistent() override { return true; }
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private:
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SVGIDRenderingObserver* mOwningObserver;
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};
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ElementTracker mObservedElementTracker;
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};
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/**
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* Note that in the current setup there are two separate observer lists.
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*
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* In SVGIDRenderingObserver's ctor, the new object adds itself to the
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* mutation observer list maintained by the referenced element. In this way the
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* SVGIDRenderingObserver is notified if there are any attribute or content
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* tree changes to the element or any of its *descendants*.
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*
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* In SVGIDRenderingObserver::GetAndObserveReferencedElement() the
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* SVGIDRenderingObserver object also adds itself to an
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* SVGRenderingObserverSet object belonging to the referenced
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* element.
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*
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* XXX: it would be nice to have a clear and concise executive summary of the
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* benefits/necessity of maintaining a second observer list.
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*/
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SVGIDRenderingObserver::SVGIDRenderingObserver(URLAndReferrerInfo* aURI,
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nsIContent* aObservingContent,
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bool aReferenceImage)
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: mObservedElementTracker(this)
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{
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// Start watching the target element
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nsCOMPtr<nsIURI> uri;
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nsCOMPtr<nsIURI> referrer;
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uint32_t referrerPolicy = mozilla::net::RP_Unset;
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if (aURI) {
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uri = aURI->GetURI();
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referrer = aURI->GetReferrer();
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referrerPolicy = aURI->GetReferrerPolicy();
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}
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mObservedElementTracker.Reset(aObservingContent, uri, referrer,
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referrerPolicy, true, aReferenceImage);
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StartObserving();
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}
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void
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SVGIDRenderingObserver::OnRenderingChange()
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{
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if (mObservedElementTracker.get() && mInObserverList) {
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SVGObserverUtils::RemoveRenderingObserver(mObservedElementTracker.get(), this);
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mInObserverList = false;
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}
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}
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class nsSVGRenderingObserverProperty : public SVGIDRenderingObserver
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{
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public:
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NS_DECL_ISUPPORTS
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nsSVGRenderingObserverProperty(URLAndReferrerInfo* aURI, nsIFrame *aFrame,
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bool aReferenceImage)
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: SVGIDRenderingObserver(aURI, aFrame->GetContent(), aReferenceImage)
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, mFrameReference(aFrame)
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{}
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protected:
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virtual ~nsSVGRenderingObserverProperty() = default; // non-public
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void OnRenderingChange() override;
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nsSVGFrameReferenceFromProperty mFrameReference;
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};
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NS_IMPL_ISUPPORTS(nsSVGRenderingObserverProperty, nsIMutationObserver)
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void
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nsSVGRenderingObserverProperty::OnRenderingChange()
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{
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SVGIDRenderingObserver::OnRenderingChange();
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nsIFrame* frame = mFrameReference.Get();
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if (frame && frame->HasAllStateBits(NS_FRAME_SVG_LAYOUT)) {
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// We need to notify anything that is observing the referencing frame or
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// any of its ancestors that the referencing frame has been invalidated.
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// Since walking the parent chain checking for observers is expensive we
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// do that using a change hint (multiple change hints of the same type are
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// coalesced).
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nsLayoutUtils::PostRestyleEvent(
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frame->GetContent()->AsElement(), nsRestyleHint(0),
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nsChangeHint_InvalidateRenderingObservers);
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}
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}
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class SVGTextPathObserver final : public nsSVGRenderingObserverProperty
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{
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public:
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SVGTextPathObserver(URLAndReferrerInfo* aURI, nsIFrame* aFrame, bool aReferenceImage)
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: nsSVGRenderingObserverProperty(aURI, aFrame, aReferenceImage)
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, mValid(true)
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{}
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bool ObservesReflow() override {
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return false;
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}
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protected:
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void OnRenderingChange() override;
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private:
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/**
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* Returns true if the target of the textPath is the frame of a 'path' element.
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*/
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bool TargetIsValid() {
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Element* target = GetReferencedElementWithoutObserving();
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return target && target->IsSVGElement(nsGkAtoms::path);
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}
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bool mValid;
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};
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void
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SVGTextPathObserver::OnRenderingChange()
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{
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nsSVGRenderingObserverProperty::OnRenderingChange();
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nsIFrame* frame = mFrameReference.Get();
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if (!frame) {
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return;
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}
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MOZ_ASSERT(frame->IsFrameOfType(nsIFrame::eSVG) ||
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nsSVGUtils::IsInSVGTextSubtree(frame),
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"SVG frame expected");
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// Avoid getting into an infinite loop of reflows if the <textPath> is
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// pointing to one of its ancestors. TargetIsValid returns true iff
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// the target element is a <path> element, and we would not have this
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// SVGTextPathObserver if this <textPath> were a descendant of the
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// target <path>.
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//
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// Note that we still have to post the restyle event when we
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// change from being valid to invalid, so that mPositions on the
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// SVGTextFrame gets updated, skipping the <textPath>, ensuring
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// that nothing gets painted for that element.
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bool nowValid = TargetIsValid();
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if (!mValid && !nowValid) {
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// Just return if we were previously invalid, and are still invalid.
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return;
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}
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mValid = nowValid;
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// Repaint asynchronously in case the path frame is being torn down
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nsChangeHint changeHint =
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nsChangeHint(nsChangeHint_RepaintFrame | nsChangeHint_UpdateTextPath);
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frame->PresContext()->RestyleManager()->PostRestyleEvent(
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frame->GetContent()->AsElement(), nsRestyleHint(0), changeHint);
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}
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class SVGMarkerObserver final: public nsSVGRenderingObserverProperty
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{
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public:
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SVGMarkerObserver(URLAndReferrerInfo* aURI, nsIFrame* aFrame, bool aReferenceImage)
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: nsSVGRenderingObserverProperty(aURI, aFrame, aReferenceImage)
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{}
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protected:
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void OnRenderingChange() override;
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};
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void
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SVGMarkerObserver::OnRenderingChange()
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{
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nsSVGRenderingObserverProperty::OnRenderingChange();
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nsIFrame* frame = mFrameReference.Get();
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if (!frame) {
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return;
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}
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MOZ_ASSERT(frame->IsFrameOfType(nsIFrame::eSVG), "SVG frame expected");
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// Don't need to request ReflowFrame if we're being reflowed.
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if (!(frame->GetStateBits() & NS_FRAME_IN_REFLOW)) {
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// XXXjwatt: We need to unify SVG into standard reflow so we can just use
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// nsChangeHint_NeedReflow | nsChangeHint_NeedDirtyReflow here.
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// XXXSDL KILL THIS!!!
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nsSVGUtils::ScheduleReflowSVG(frame);
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}
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frame->PresContext()->RestyleManager()->PostRestyleEvent(
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frame->GetContent()->AsElement(), nsRestyleHint(0),
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nsChangeHint_RepaintFrame);
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}
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class nsSVGPaintingProperty final : public nsSVGRenderingObserverProperty
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{
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public:
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nsSVGPaintingProperty(URLAndReferrerInfo* aURI, nsIFrame* aFrame, bool aReferenceImage)
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: nsSVGRenderingObserverProperty(aURI, aFrame, aReferenceImage)
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{}
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protected:
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void OnRenderingChange() override;
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};
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void
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nsSVGPaintingProperty::OnRenderingChange()
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{
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nsSVGRenderingObserverProperty::OnRenderingChange();
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nsIFrame* frame = mFrameReference.Get();
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if (!frame) {
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return;
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}
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if (frame->GetStateBits() & NS_FRAME_SVG_LAYOUT) {
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frame->InvalidateFrameSubtree();
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} else {
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for (nsIFrame* f = frame; f;
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f = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(f)) {
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f->InvalidateFrame();
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}
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}
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}
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/**
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* In a filter chain, there can be multiple SVG reference filters.
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* e.g. filter: url(#svg-filter-1) blur(10px) url(#svg-filter-2);
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*
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* This class keeps track of one SVG reference filter in a filter chain.
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* e.g. url(#svg-filter-1)
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*
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* It fires invalidations when the SVG filter element's id changes or when
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* the SVG filter element's content changes.
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*
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* The SVGFilterObserverList class manages a list of SVGFilterObservers.
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*/
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class SVGFilterObserver final : public SVGIDRenderingObserver
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{
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public:
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SVGFilterObserver(URLAndReferrerInfo* aURI,
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nsIContent* aObservingContent,
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SVGFilterObserverList* aFilterChainObserver)
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: SVGIDRenderingObserver(aURI, aObservingContent, false)
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, mFilterObserverList(aFilterChainObserver)
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{}
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// XXXjwatt: This will return false if the reference is to a filter in an
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// external resource document that hasn't loaded yet!
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bool ReferencesValidResource() { return GetAndObserveFilterFrame(); }
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void DetachFromChainObserver() { mFilterObserverList = nullptr; }
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/**
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* @return the filter frame, or null if there is no filter frame
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*/
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nsSVGFilterFrame* GetAndObserveFilterFrame();
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// nsISupports
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_CLASS(SVGFilterObserver)
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void Invalidate() { OnRenderingChange(); };
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protected:
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virtual ~SVGFilterObserver() = default; // non-public
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// SVGIDRenderingObserver
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void OnRenderingChange() override;
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|
|
private:
|
|
SVGFilterObserverList* mFilterObserverList;
|
|
};
|
|
|
|
NS_IMPL_CYCLE_COLLECTING_ADDREF(SVGFilterObserver)
|
|
NS_IMPL_CYCLE_COLLECTING_RELEASE(SVGFilterObserver)
|
|
|
|
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(SVGFilterObserver)
|
|
NS_INTERFACE_MAP_ENTRY(nsISupports)
|
|
NS_INTERFACE_MAP_ENTRY(nsIMutationObserver)
|
|
NS_INTERFACE_MAP_END
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_CLASS(SVGFilterObserver)
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(SVGFilterObserver)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mObservedElementTracker)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(SVGFilterObserver)
|
|
tmp->StopObserving();
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK(mObservedElementTracker);
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
|
|
|
|
nsSVGFilterFrame*
|
|
SVGFilterObserver::GetAndObserveFilterFrame()
|
|
{
|
|
return static_cast<nsSVGFilterFrame*>(
|
|
GetAndObserveReferencedFrame(LayoutFrameType::SVGFilter, nullptr));
|
|
}
|
|
|
|
|
|
/**
|
|
* This class manages a list of SVGFilterObservers, which correspond to
|
|
* reference to SVG filters in a list of filters in a given 'filter' property.
|
|
* e.g. filter: url(#svg-filter-1) blur(10px) url(#svg-filter-2);
|
|
*
|
|
* In the above example, the SVGFilterObserverList will manage two
|
|
* SVGFilterObservers, one for each of the references to SVG filters. CSS
|
|
* filters like "blur(10px)" don't reference filter elements, so they don't
|
|
* need an SVGFilterObserver. The style system invalidates changes to CSS
|
|
* filters.
|
|
*/
|
|
class SVGFilterObserverList : public nsISupports
|
|
{
|
|
public:
|
|
SVGFilterObserverList(const nsTArray<nsStyleFilter>& aFilters,
|
|
nsIContent* aFilteredElement,
|
|
nsIFrame* aFiltedFrame = nullptr);
|
|
|
|
bool ReferencesValidResources();
|
|
void Invalidate() { OnRenderingChange(); }
|
|
|
|
const nsTArray<RefPtr<SVGFilterObserver>>& GetObservers() const {
|
|
return mObservers;
|
|
}
|
|
|
|
// nsISupports
|
|
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
|
|
NS_DECL_CYCLE_COLLECTION_CLASS(SVGFilterObserverList)
|
|
|
|
protected:
|
|
virtual ~SVGFilterObserverList();
|
|
|
|
virtual void OnRenderingChange() = 0;
|
|
|
|
private:
|
|
|
|
void DetachObservers()
|
|
{
|
|
for (uint32_t i = 0; i < mObservers.Length(); i++) {
|
|
mObservers[i]->DetachFromChainObserver();
|
|
}
|
|
}
|
|
|
|
nsTArray<RefPtr<SVGFilterObserver>> mObservers;
|
|
};
|
|
|
|
void
|
|
SVGFilterObserver::OnRenderingChange()
|
|
{
|
|
SVGIDRenderingObserver::OnRenderingChange();
|
|
|
|
if (mFilterObserverList) {
|
|
mFilterObserverList->Invalidate();
|
|
}
|
|
}
|
|
|
|
NS_IMPL_CYCLE_COLLECTING_ADDREF(SVGFilterObserverList)
|
|
NS_IMPL_CYCLE_COLLECTING_RELEASE(SVGFilterObserverList)
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_CLASS(SVGFilterObserverList)
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(SVGFilterObserverList)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mObservers)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(SVGFilterObserverList)
|
|
tmp->DetachObservers();
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK(mObservers);
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
|
|
|
|
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(SVGFilterObserverList)
|
|
NS_INTERFACE_MAP_ENTRY(nsISupports)
|
|
NS_INTERFACE_MAP_END
|
|
|
|
SVGFilterObserverList::SVGFilterObserverList(const nsTArray<nsStyleFilter>& aFilters,
|
|
nsIContent* aFilteredElement,
|
|
nsIFrame* aFilteredFrame)
|
|
{
|
|
for (uint32_t i = 0; i < aFilters.Length(); i++) {
|
|
if (aFilters[i].GetType() != NS_STYLE_FILTER_URL) {
|
|
continue;
|
|
}
|
|
|
|
// aFilteredFrame can be null if this filter belongs to a
|
|
// CanvasRenderingContext2D.
|
|
RefPtr<URLAndReferrerInfo> filterURL;
|
|
if (aFilteredFrame) {
|
|
filterURL = ResolveURLUsingLocalRef(aFilteredFrame, aFilters[i].GetURL());
|
|
} else {
|
|
nsCOMPtr<nsIURI> resolvedURI =
|
|
aFilters[i].GetURL()->ResolveLocalRef(aFilteredElement);
|
|
if (resolvedURI) {
|
|
filterURL = new URLAndReferrerInfo(
|
|
resolvedURI,
|
|
aFilters[i].GetURL()->mExtraData->GetReferrer(),
|
|
aFilters[i].GetURL()->mExtraData->GetReferrerPolicy());
|
|
}
|
|
}
|
|
|
|
RefPtr<SVGFilterObserver> observer =
|
|
new SVGFilterObserver(filterURL, aFilteredElement, this);
|
|
mObservers.AppendElement(observer);
|
|
}
|
|
}
|
|
|
|
SVGFilterObserverList::~SVGFilterObserverList()
|
|
{
|
|
DetachObservers();
|
|
}
|
|
|
|
bool
|
|
SVGFilterObserverList::ReferencesValidResources()
|
|
{
|
|
for (uint32_t i = 0; i < mObservers.Length(); i++) {
|
|
if (!mObservers[i]->ReferencesValidResource()) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
class SVGFilterObserverListForCSSProp final : public SVGFilterObserverList
|
|
{
|
|
public:
|
|
SVGFilterObserverListForCSSProp(const nsTArray<nsStyleFilter>& aFilters,
|
|
nsIFrame* aFilteredFrame)
|
|
: SVGFilterObserverList(aFilters, aFilteredFrame->GetContent(),
|
|
aFilteredFrame)
|
|
, mFrameReference(aFilteredFrame)
|
|
{}
|
|
|
|
void DetachFromFrame() { mFrameReference.Detach(); }
|
|
|
|
protected:
|
|
void OnRenderingChange() override;
|
|
|
|
nsSVGFrameReferenceFromProperty mFrameReference;
|
|
};
|
|
|
|
void
|
|
SVGFilterObserverListForCSSProp::OnRenderingChange()
|
|
{
|
|
nsIFrame* frame = mFrameReference.Get();
|
|
if (!frame)
|
|
return;
|
|
|
|
// Repaint asynchronously in case the filter frame is being torn down
|
|
nsChangeHint changeHint =
|
|
nsChangeHint(nsChangeHint_RepaintFrame);
|
|
|
|
// Since we don't call nsSVGRenderingObserverProperty::
|
|
// OnRenderingChange, we have to add this bit ourselves.
|
|
if (frame->HasAllStateBits(NS_FRAME_SVG_LAYOUT)) {
|
|
// Changes should propagate out to things that might be observing
|
|
// the referencing frame or its ancestors.
|
|
changeHint |= nsChangeHint_InvalidateRenderingObservers;
|
|
}
|
|
|
|
// Don't need to request UpdateOverflow if we're being reflowed.
|
|
if (!(frame->GetStateBits() & NS_FRAME_IN_REFLOW)) {
|
|
changeHint |= nsChangeHint_UpdateOverflow;
|
|
}
|
|
frame->PresContext()->RestyleManager()->PostRestyleEvent(
|
|
frame->GetContent()->AsElement(), nsRestyleHint(0), changeHint);
|
|
}
|
|
|
|
|
|
class SVGFilterObserverListForCanvasContext final : public SVGFilterObserverList
|
|
{
|
|
public:
|
|
SVGFilterObserverListForCanvasContext(CanvasRenderingContext2D* aContext,
|
|
Element* aCanvasElement,
|
|
nsTArray<nsStyleFilter>& aFilters)
|
|
: SVGFilterObserverList(aFilters, aCanvasElement)
|
|
, mContext(aContext)
|
|
{}
|
|
|
|
void OnRenderingChange() override;
|
|
void DetachFromContext() { mContext = nullptr; }
|
|
|
|
private:
|
|
CanvasRenderingContext2D* mContext;
|
|
};
|
|
|
|
void
|
|
SVGFilterObserverListForCanvasContext::OnRenderingChange()
|
|
{
|
|
if (!mContext) {
|
|
MOZ_CRASH("GFX: This should never be called without a context");
|
|
}
|
|
// Refresh the cached FilterDescription in mContext->CurrentState().filter.
|
|
// If this filter is not at the top of the state stack, we'll refresh the
|
|
// wrong filter, but that's ok, because we'll refresh the right filter
|
|
// when we pop the state stack in CanvasRenderingContext2D::Restore().
|
|
RefPtr<CanvasRenderingContext2D> kungFuDeathGrip(mContext);
|
|
kungFuDeathGrip->UpdateFilter();
|
|
}
|
|
|
|
|
|
class SVGMaskObserverList final : public nsISupports
|
|
{
|
|
public:
|
|
explicit SVGMaskObserverList(nsIFrame* aFrame);
|
|
|
|
// nsISupports
|
|
NS_DECL_ISUPPORTS
|
|
|
|
const nsTArray<RefPtr<nsSVGPaintingProperty>>& GetObservers() const
|
|
{
|
|
return mProperties;
|
|
}
|
|
|
|
void ResolveImage(uint32_t aIndex);
|
|
|
|
private:
|
|
virtual ~SVGMaskObserverList() = default; // non-public
|
|
nsTArray<RefPtr<nsSVGPaintingProperty>> mProperties;
|
|
nsIFrame* mFrame;
|
|
};
|
|
|
|
NS_IMPL_ISUPPORTS(SVGMaskObserverList, nsISupports)
|
|
|
|
SVGMaskObserverList::SVGMaskObserverList(nsIFrame* aFrame)
|
|
: mFrame(aFrame)
|
|
{
|
|
const nsStyleSVGReset *svgReset = aFrame->StyleSVGReset();
|
|
|
|
for (uint32_t i = 0; i < svgReset->mMask.mImageCount; i++) {
|
|
css::URLValueData* data = svgReset->mMask.mLayers[i].mImage.GetURLValue();
|
|
RefPtr<URLAndReferrerInfo> maskUri = ResolveURLUsingLocalRef(aFrame, data);
|
|
|
|
bool hasRef = false;
|
|
if (maskUri) {
|
|
maskUri->GetURI()->GetHasRef(&hasRef);
|
|
}
|
|
|
|
// Accrording to maskUri, nsSVGPaintingProperty's ctor may trigger an
|
|
// external SVG resource download, so we should pass maskUri in only if
|
|
// maskUri has a chance pointing to an SVG mask resource.
|
|
//
|
|
// And, an URL may refer to an SVG mask resource if it consists of
|
|
// a fragment.
|
|
nsSVGPaintingProperty* prop =
|
|
new nsSVGPaintingProperty(hasRef ? maskUri.get() : nullptr,
|
|
aFrame, false);
|
|
mProperties.AppendElement(prop);
|
|
}
|
|
}
|
|
|
|
void
|
|
SVGMaskObserverList::ResolveImage(uint32_t aIndex)
|
|
{
|
|
const nsStyleSVGReset* svgReset = mFrame->StyleSVGReset();
|
|
MOZ_ASSERT(aIndex < svgReset->mMask.mImageCount);
|
|
|
|
nsStyleImage& image =
|
|
const_cast<nsStyleImage&>(svgReset->mMask.mLayers[aIndex].mImage);
|
|
|
|
if (!image.IsResolved()) {
|
|
MOZ_ASSERT(image.GetType() == nsStyleImageType::eStyleImageType_Image);
|
|
image.ResolveImage(mFrame->PresContext(), nullptr);
|
|
|
|
mozilla::css::ImageLoader* imageLoader =
|
|
mFrame->PresContext()->Document()->StyleImageLoader();
|
|
if (imgRequestProxy* req = image.GetImageData()) {
|
|
imageLoader->AssociateRequestToFrame(req, mFrame, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Used for gradient-to-gradient, pattern-to-pattern and filter-to-filter
|
|
* references to "template" elements (specified via the 'href' attributes).
|
|
*
|
|
* This is a special class for the case where we know we only want to call
|
|
* InvalidateDirectRenderingObservers (as opposed to
|
|
* InvalidateRenderingObservers).
|
|
*
|
|
* TODO(jwatt): If we added a new NS_FRAME_RENDERING_OBSERVER_CONTAINER state
|
|
* bit to clipPath, filter, gradients, marker, mask, pattern and symbol, and
|
|
* could have InvalidateRenderingObservers stop on reaching such an element,
|
|
* then we would no longer need this class (not to mention improving perf by
|
|
* significantly cutting down on ancestor traversal).
|
|
*/
|
|
class SVGTemplateElementObserver : public SVGIDRenderingObserver
|
|
{
|
|
public:
|
|
NS_DECL_ISUPPORTS
|
|
|
|
SVGTemplateElementObserver(URLAndReferrerInfo* aURI, nsIFrame* aFrame,
|
|
bool aReferenceImage)
|
|
: SVGIDRenderingObserver(aURI, aFrame->GetContent(), aReferenceImage)
|
|
, mFrameReference(aFrame)
|
|
{}
|
|
|
|
protected:
|
|
virtual ~SVGTemplateElementObserver() = default; // non-public
|
|
|
|
void OnRenderingChange() override;
|
|
|
|
nsSVGFrameReferenceFromProperty mFrameReference;
|
|
};
|
|
|
|
NS_IMPL_ISUPPORTS(SVGTemplateElementObserver, nsIMutationObserver)
|
|
|
|
void
|
|
SVGTemplateElementObserver::OnRenderingChange()
|
|
{
|
|
SVGIDRenderingObserver::OnRenderingChange();
|
|
|
|
if (nsIFrame* frame = mFrameReference.Get()) {
|
|
// We know that we don't need to walk the parent chain notifying rendering
|
|
// observers since changes to a gradient etc. do not affect ancestor
|
|
// elements. So we only invalidate *direct* rendering observers here.
|
|
// Since we don't need to walk the parent chain, we don't need to worry
|
|
// about coalescing multiple invalidations by using a change hint as we do
|
|
// in nsSVGRenderingObserverProperty::OnRenderingChange.
|
|
SVGObserverUtils::InvalidateDirectRenderingObservers(frame);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* An instance of this class is stored on an observed frame (as a frame
|
|
* property) whenever the frame has active rendering observers. It is used to
|
|
* store pointers to the SVGRenderingObserver instances belonging to any
|
|
* observing frames, allowing invalidations from the observed frame to be sent
|
|
* to all observing frames.
|
|
*
|
|
* SVGRenderingObserver instances that are added are not strongly referenced,
|
|
* so they must remove themselves before they die.
|
|
*
|
|
* This class is "single-shot", which is to say that when something about the
|
|
* observed element changes, InvalidateAll() clears our hashtable of
|
|
* SVGRenderingObservers. SVGRenderingObserver objects will be added back
|
|
* again if/when the observing frame looks up our observed frame to use it.
|
|
*
|
|
* XXXjwatt: is this the best thing to do nowadays? Back when that mechanism
|
|
* landed in bug 330498 we had two pass, recursive invalidation up the frame
|
|
* tree, and I think reference loops were a problem. Nowadays maybe a flag
|
|
* on the SVGRenderingObserver objects to coalesce invalidations may work
|
|
* better?
|
|
*
|
|
* InvalidateAll must be called before this object is destroyed, i.e.
|
|
* before the referenced frame is destroyed. This should normally happen
|
|
* via nsSVGContainerFrame::RemoveFrame, since only frames in the frame
|
|
* tree should be referenced.
|
|
*/
|
|
class SVGRenderingObserverSet
|
|
{
|
|
public:
|
|
SVGRenderingObserverSet()
|
|
: mObservers(4)
|
|
{
|
|
MOZ_COUNT_CTOR(SVGRenderingObserverSet);
|
|
}
|
|
|
|
~SVGRenderingObserverSet() {
|
|
InvalidateAll();
|
|
MOZ_COUNT_DTOR(SVGRenderingObserverSet);
|
|
}
|
|
|
|
void Add(SVGRenderingObserver* aObserver) {
|
|
mObservers.PutEntry(aObserver);
|
|
}
|
|
void Remove(SVGRenderingObserver* aObserver) {
|
|
mObservers.RemoveEntry(aObserver);
|
|
}
|
|
#ifdef DEBUG
|
|
bool Contains(SVGRenderingObserver* aObserver) {
|
|
return (mObservers.GetEntry(aObserver) != nullptr);
|
|
}
|
|
#endif
|
|
bool IsEmpty() {
|
|
return mObservers.IsEmpty();
|
|
}
|
|
|
|
/**
|
|
* Drop all our observers, and notify them that we have changed and dropped
|
|
* our reference to them.
|
|
*/
|
|
void InvalidateAll();
|
|
|
|
/**
|
|
* Drop all observers that observe reflow, and notify them that we have changed and dropped
|
|
* our reference to them.
|
|
*/
|
|
void InvalidateAllForReflow();
|
|
|
|
/**
|
|
* Drop all our observers, and notify them that we have dropped our reference
|
|
* to them.
|
|
*/
|
|
void RemoveAll();
|
|
|
|
private:
|
|
nsTHashtable<nsPtrHashKey<SVGRenderingObserver>> mObservers;
|
|
};
|
|
|
|
void
|
|
SVGRenderingObserverSet::InvalidateAll()
|
|
{
|
|
if (mObservers.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
AutoTArray<SVGRenderingObserver*,10> observers;
|
|
|
|
for (auto it = mObservers.Iter(); !it.Done(); it.Next()) {
|
|
observers.AppendElement(it.Get()->GetKey());
|
|
}
|
|
mObservers.Clear();
|
|
|
|
for (uint32_t i = 0; i < observers.Length(); ++i) {
|
|
observers[i]->OnNonDOMMutationRenderingChange();
|
|
}
|
|
}
|
|
|
|
void
|
|
SVGRenderingObserverSet::InvalidateAllForReflow()
|
|
{
|
|
if (mObservers.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
AutoTArray<SVGRenderingObserver*,10> observers;
|
|
|
|
for (auto it = mObservers.Iter(); !it.Done(); it.Next()) {
|
|
SVGRenderingObserver* obs = it.Get()->GetKey();
|
|
if (obs->ObservesReflow()) {
|
|
observers.AppendElement(obs);
|
|
it.Remove();
|
|
}
|
|
}
|
|
|
|
for (uint32_t i = 0; i < observers.Length(); ++i) {
|
|
observers[i]->OnNonDOMMutationRenderingChange();
|
|
}
|
|
}
|
|
|
|
void
|
|
SVGRenderingObserverSet::RemoveAll()
|
|
{
|
|
AutoTArray<SVGRenderingObserver*,10> observers;
|
|
|
|
for (auto it = mObservers.Iter(); !it.Done(); it.Next()) {
|
|
observers.AppendElement(it.Get()->GetKey());
|
|
}
|
|
mObservers.Clear();
|
|
|
|
// Our list is now cleared. We need to notify the observers we've removed,
|
|
// so they can update their state & remove themselves as mutation-observers.
|
|
for (uint32_t i = 0; i < observers.Length(); ++i) {
|
|
observers[i]->NotifyEvictedFromRenderingObserverSet();
|
|
}
|
|
}
|
|
|
|
|
|
static SVGRenderingObserverSet*
|
|
GetObserverSet(Element* aElement)
|
|
{
|
|
return static_cast<SVGRenderingObserverSet*>
|
|
(aElement->GetProperty(nsGkAtoms::renderingobserverset));
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
// Defined down here because we need SVGRenderingObserverSet's definition.
|
|
void
|
|
SVGRenderingObserver::DebugObserverSet()
|
|
{
|
|
Element* referencedElement = GetReferencedElementWithoutObserving();
|
|
if (referencedElement) {
|
|
SVGRenderingObserverSet* observers = GetObserverSet(referencedElement);
|
|
bool inObserverSet = observers && observers->Contains(this);
|
|
MOZ_ASSERT(inObserverSet == mInObserverList,
|
|
"failed to track whether we're in our referenced element's observer set!");
|
|
} else {
|
|
MOZ_ASSERT(!mInObserverList, "In whose observer set are we, then?");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
typedef nsInterfaceHashtable<nsRefPtrHashKey<URLAndReferrerInfo>,
|
|
nsIMutationObserver> URIObserverHashtable;
|
|
|
|
using PaintingPropertyDescriptor =
|
|
const mozilla::FramePropertyDescriptor<nsSVGPaintingProperty>*;
|
|
|
|
void DestroyFilterProperty(SVGFilterObserverListForCSSProp* aProp)
|
|
{
|
|
// SVGFilterObserverListForCSSProp is cycle-collected, so dropping the last
|
|
// reference doesn't necessarily destroy it. We need to tell it that the
|
|
// frame has now become invalid.
|
|
aProp->DetachFromFrame();
|
|
|
|
aProp->Release();
|
|
}
|
|
|
|
NS_DECLARE_FRAME_PROPERTY_RELEASABLE(HrefToTemplateProperty,
|
|
SVGTemplateElementObserver)
|
|
NS_DECLARE_FRAME_PROPERTY_WITH_DTOR(FilterProperty,
|
|
SVGFilterObserverListForCSSProp,
|
|
DestroyFilterProperty)
|
|
NS_DECLARE_FRAME_PROPERTY_RELEASABLE(MaskProperty, SVGMaskObserverList)
|
|
NS_DECLARE_FRAME_PROPERTY_RELEASABLE(ClipPathProperty, nsSVGPaintingProperty)
|
|
NS_DECLARE_FRAME_PROPERTY_RELEASABLE(MarkerStartProperty, SVGMarkerObserver)
|
|
NS_DECLARE_FRAME_PROPERTY_RELEASABLE(MarkerMidProperty, SVGMarkerObserver)
|
|
NS_DECLARE_FRAME_PROPERTY_RELEASABLE(MarkerEndProperty, SVGMarkerObserver)
|
|
NS_DECLARE_FRAME_PROPERTY_RELEASABLE(FillProperty, nsSVGPaintingProperty)
|
|
NS_DECLARE_FRAME_PROPERTY_RELEASABLE(StrokeProperty, nsSVGPaintingProperty)
|
|
NS_DECLARE_FRAME_PROPERTY_RELEASABLE(HrefAsTextPathProperty,
|
|
SVGTextPathObserver)
|
|
NS_DECLARE_FRAME_PROPERTY_DELETABLE(BackgroundImageProperty,
|
|
URIObserverHashtable)
|
|
|
|
template<class T>
|
|
static T*
|
|
GetEffectProperty(URLAndReferrerInfo* aURI, nsIFrame* aFrame,
|
|
const mozilla::FramePropertyDescriptor<T>* aProperty)
|
|
{
|
|
if (!aURI)
|
|
return nullptr;
|
|
|
|
T* prop = aFrame->GetProperty(aProperty);
|
|
if (prop)
|
|
return prop;
|
|
prop = new T(aURI, aFrame, false);
|
|
NS_ADDREF(prop);
|
|
aFrame->SetProperty(aProperty, prop);
|
|
return prop;
|
|
}
|
|
|
|
static nsSVGPaintingProperty*
|
|
GetPaintingProperty(URLAndReferrerInfo* aURI, nsIFrame* aFrame,
|
|
const mozilla::FramePropertyDescriptor<nsSVGPaintingProperty>* aProperty)
|
|
{
|
|
return GetEffectProperty(aURI, aFrame, aProperty);
|
|
}
|
|
|
|
|
|
static already_AddRefed<URLAndReferrerInfo>
|
|
GetMarkerURI(nsIFrame* aFrame, RefPtr<css::URLValue> nsStyleSVG::* aMarker)
|
|
{
|
|
return ResolveURLUsingLocalRef(aFrame, aFrame->StyleSVG()->*aMarker);
|
|
}
|
|
|
|
bool
|
|
SVGObserverUtils::GetAndObserveMarkers(nsIFrame* aMarkedFrame,
|
|
nsSVGMarkerFrame*(*aFrames)[3])
|
|
{
|
|
MOZ_ASSERT(!aMarkedFrame->GetPrevContinuation() &&
|
|
aMarkedFrame->IsSVGGeometryFrame() &&
|
|
static_cast<SVGGeometryElement*>(aMarkedFrame->GetContent())->IsMarkable(),
|
|
"Bad frame");
|
|
|
|
bool foundMarker = false;
|
|
RefPtr<URLAndReferrerInfo> markerURL;
|
|
SVGMarkerObserver* observer;
|
|
nsIFrame* marker;
|
|
|
|
#define GET_MARKER(type) \
|
|
markerURL = GetMarkerURI(aMarkedFrame, &nsStyleSVG::mMarker##type); \
|
|
observer = GetEffectProperty(markerURL, aMarkedFrame, \
|
|
Marker##type##Property()); \
|
|
marker = observer ? \
|
|
observer->GetAndObserveReferencedFrame(LayoutFrameType::SVGMarker, \
|
|
nullptr) : \
|
|
nullptr; \
|
|
foundMarker = foundMarker || bool(marker); \
|
|
(*aFrames)[nsSVGMark::e##type] = static_cast<nsSVGMarkerFrame*>(marker);
|
|
|
|
GET_MARKER(Start)
|
|
GET_MARKER(Mid)
|
|
GET_MARKER(End)
|
|
|
|
#undef GET_MARKER
|
|
|
|
return foundMarker;
|
|
}
|
|
|
|
// Note that the returned list will be empty in the case of a 'filter' property
|
|
// that only specifies CSS filter functions (no url()'s to SVG filters).
|
|
static SVGFilterObserverListForCSSProp*
|
|
GetOrCreateFilterObserverListForCSS(nsIFrame* aFrame)
|
|
{
|
|
MOZ_ASSERT(!aFrame->GetPrevContinuation(), "Require first continuation");
|
|
|
|
const nsStyleEffects* effects = aFrame->StyleEffects();
|
|
if (!effects->HasFilters()) {
|
|
return nullptr;
|
|
}
|
|
SVGFilterObserverListForCSSProp* observers =
|
|
aFrame->GetProperty(FilterProperty());
|
|
if (observers) {
|
|
return observers;
|
|
}
|
|
observers = new SVGFilterObserverListForCSSProp(effects->mFilters, aFrame);
|
|
NS_ADDREF(observers);
|
|
aFrame->SetProperty(FilterProperty(), observers);
|
|
return observers;
|
|
}
|
|
|
|
static SVGObserverUtils::ReferenceState
|
|
GetAndObserveFilters(SVGFilterObserverListForCSSProp* aObserverList,
|
|
nsTArray<nsSVGFilterFrame*>* aFilterFrames)
|
|
{
|
|
if (!aObserverList) {
|
|
return SVGObserverUtils::eHasNoRefs;
|
|
}
|
|
|
|
const nsTArray<RefPtr<SVGFilterObserver>>& observers =
|
|
aObserverList->GetObservers();
|
|
if (observers.IsEmpty()) {
|
|
return SVGObserverUtils::eHasNoRefs;
|
|
}
|
|
|
|
for (uint32_t i = 0; i < observers.Length(); i++) {
|
|
nsSVGFilterFrame* filter = observers[i]->GetAndObserveFilterFrame();
|
|
if (!filter) {
|
|
if (aFilterFrames) {
|
|
aFilterFrames->Clear();
|
|
}
|
|
return SVGObserverUtils::eHasRefsSomeInvalid;
|
|
}
|
|
if (aFilterFrames) {
|
|
aFilterFrames->AppendElement(filter);
|
|
}
|
|
}
|
|
|
|
return SVGObserverUtils::eHasRefsAllValid;
|
|
}
|
|
|
|
SVGObserverUtils::ReferenceState
|
|
SVGObserverUtils::GetAndObserveFilters(nsIFrame* aFilteredFrame,
|
|
nsTArray<nsSVGFilterFrame*>* aFilterFrames)
|
|
{
|
|
SVGFilterObserverListForCSSProp* observerList =
|
|
GetOrCreateFilterObserverListForCSS(aFilteredFrame);
|
|
return ::GetAndObserveFilters(observerList, aFilterFrames);
|
|
}
|
|
|
|
SVGObserverUtils::ReferenceState
|
|
SVGObserverUtils::GetFiltersIfObserving(nsIFrame* aFilteredFrame,
|
|
nsTArray<nsSVGFilterFrame*>* aFilterFrames)
|
|
{
|
|
SVGFilterObserverListForCSSProp* observerList =
|
|
aFilteredFrame->GetProperty(FilterProperty());
|
|
return ::GetAndObserveFilters(observerList, aFilterFrames);
|
|
}
|
|
|
|
already_AddRefed<nsISupports>
|
|
SVGObserverUtils::ObserveFiltersForCanvasContext(CanvasRenderingContext2D* aContext,
|
|
Element* aCanvasElement,
|
|
nsTArray<nsStyleFilter>& aFilters)
|
|
{
|
|
return do_AddRef(new SVGFilterObserverListForCanvasContext(aContext,
|
|
aCanvasElement,
|
|
aFilters));
|
|
}
|
|
|
|
void
|
|
SVGObserverUtils::DetachFromCanvasContext(nsISupports* aAutoObserver)
|
|
{
|
|
static_cast<SVGFilterObserverListForCanvasContext*>(aAutoObserver)->
|
|
DetachFromContext();
|
|
}
|
|
|
|
|
|
static nsSVGPaintingProperty*
|
|
GetOrCreateClipPathObserver(nsIFrame* aClippedFrame)
|
|
{
|
|
MOZ_ASSERT(!aClippedFrame->GetPrevContinuation(), "Require first continuation");
|
|
|
|
const nsStyleSVGReset* svgStyleReset = aClippedFrame->StyleSVGReset();
|
|
if (svgStyleReset->mClipPath.GetType() != StyleShapeSourceType::URL) {
|
|
return nullptr;
|
|
}
|
|
css::URLValue* url = svgStyleReset->mClipPath.GetURL();
|
|
RefPtr<URLAndReferrerInfo> pathURI = ResolveURLUsingLocalRef(aClippedFrame, url);
|
|
return GetPaintingProperty(pathURI, aClippedFrame, ClipPathProperty());
|
|
}
|
|
|
|
SVGObserverUtils::ReferenceState
|
|
SVGObserverUtils::GetAndObserveClipPath(nsIFrame* aClippedFrame,
|
|
nsSVGClipPathFrame** aClipPathFrame)
|
|
{
|
|
if (aClipPathFrame) {
|
|
*aClipPathFrame = nullptr;
|
|
}
|
|
nsSVGPaintingProperty* observers = GetOrCreateClipPathObserver(aClippedFrame);
|
|
if (!observers) {
|
|
return eHasNoRefs;
|
|
}
|
|
bool frameTypeOK = true;
|
|
nsSVGClipPathFrame* frame = static_cast<nsSVGClipPathFrame*>(
|
|
observers->GetAndObserveReferencedFrame(LayoutFrameType::SVGClipPath,
|
|
&frameTypeOK));
|
|
// Note that, unlike for filters, a reference to an ID that doesn't exist
|
|
// is not invalid for clip-path or mask.
|
|
if (!frameTypeOK || (frame && !frame->IsValid())) {
|
|
return eHasRefsSomeInvalid;
|
|
}
|
|
if (aClipPathFrame) {
|
|
*aClipPathFrame = frame;
|
|
}
|
|
return frame ? eHasRefsAllValid : eHasNoRefs;
|
|
}
|
|
|
|
static SVGMaskObserverList*
|
|
GetOrCreateMaskObserverList(nsIFrame* aMaskedFrame)
|
|
{
|
|
MOZ_ASSERT(!aMaskedFrame->GetPrevContinuation(), "Require first continuation");
|
|
|
|
const nsStyleSVGReset* style = aMaskedFrame->StyleSVGReset();
|
|
if (!style->HasMask()) {
|
|
return nullptr;
|
|
}
|
|
|
|
MOZ_ASSERT(style->mMask.mImageCount > 0);
|
|
|
|
SVGMaskObserverList* prop =
|
|
aMaskedFrame->GetProperty(MaskProperty());
|
|
if (prop) {
|
|
return prop;
|
|
}
|
|
prop = new SVGMaskObserverList(aMaskedFrame);
|
|
NS_ADDREF(prop);
|
|
aMaskedFrame->SetProperty(MaskProperty(), prop);
|
|
return prop;
|
|
}
|
|
|
|
SVGObserverUtils::ReferenceState
|
|
SVGObserverUtils::GetAndObserveMasks(nsIFrame* aMaskedFrame,
|
|
nsTArray<nsSVGMaskFrame*>* aMaskFrames)
|
|
{
|
|
SVGMaskObserverList* observerList = GetOrCreateMaskObserverList(aMaskedFrame);
|
|
if (!observerList) {
|
|
return eHasNoRefs;
|
|
}
|
|
|
|
const nsTArray<RefPtr<nsSVGPaintingProperty>>& observers =
|
|
observerList->GetObservers();
|
|
if (observers.IsEmpty()) {
|
|
return eHasNoRefs;
|
|
}
|
|
|
|
ReferenceState state = eHasRefsAllValid;
|
|
|
|
for (size_t i = 0; i < observers.Length(); i++) {
|
|
bool frameTypeOK = true;
|
|
nsSVGMaskFrame* maskFrame = static_cast<nsSVGMaskFrame*>(
|
|
observers[i]->GetAndObserveReferencedFrame(LayoutFrameType::SVGMask,
|
|
&frameTypeOK));
|
|
MOZ_ASSERT(!maskFrame || frameTypeOK);
|
|
// XXXjwatt: this looks fishy
|
|
if (!frameTypeOK) {
|
|
// We can not find the specific SVG mask resource in the downloaded SVG
|
|
// document. There are two possibilities:
|
|
// 1. The given resource id is invalid.
|
|
// 2. The given resource id refers to a viewbox.
|
|
//
|
|
// Hand it over to the style image.
|
|
observerList->ResolveImage(i);
|
|
state = eHasRefsSomeInvalid;
|
|
}
|
|
if (aMaskFrames) {
|
|
aMaskFrames->AppendElement(maskFrame);
|
|
}
|
|
}
|
|
|
|
return state;
|
|
}
|
|
|
|
SVGGeometryElement*
|
|
SVGObserverUtils::GetAndObserveTextPathsPath(nsIFrame* aTextPathFrame)
|
|
{
|
|
SVGTextPathObserver* property =
|
|
aTextPathFrame->GetProperty(HrefAsTextPathProperty());
|
|
|
|
if (!property) {
|
|
nsIContent* content = aTextPathFrame->GetContent();
|
|
nsAutoString href;
|
|
static_cast<SVGTextPathElement*>(content)->HrefAsString(href);
|
|
if (href.IsEmpty()) {
|
|
return nullptr; // no URL
|
|
}
|
|
|
|
nsCOMPtr<nsIURI> targetURI;
|
|
nsCOMPtr<nsIURI> base = content->GetBaseURI();
|
|
nsContentUtils::NewURIWithDocumentCharset(getter_AddRefs(targetURI), href,
|
|
content->GetUncomposedDoc(), base);
|
|
|
|
// There's no clear refererer policy spec about non-CSS SVG resource references
|
|
// Bug 1415044 to investigate which referrer we should use
|
|
RefPtr<URLAndReferrerInfo> target =
|
|
new URLAndReferrerInfo(targetURI,
|
|
content->OwnerDoc()->GetDocumentURI(),
|
|
content->OwnerDoc()->GetReferrerPolicy());
|
|
|
|
property = GetEffectProperty(target, aTextPathFrame,
|
|
HrefAsTextPathProperty());
|
|
if (!property) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
Element* element = property->GetAndObserveReferencedElement();
|
|
return (element && element->IsNodeOfType(nsINode::eSHAPE)) ?
|
|
static_cast<SVGGeometryElement*>(element) : nullptr;
|
|
}
|
|
|
|
void
|
|
SVGObserverUtils::InitiateResourceDocLoads(nsIFrame* aFrame)
|
|
{
|
|
// We create observer objects and attach them to aFrame, but we do not
|
|
// make aFrame start observing the referenced frames.
|
|
Unused << GetOrCreateFilterObserverListForCSS(aFrame);
|
|
Unused << GetOrCreateClipPathObserver(aFrame);
|
|
Unused << GetOrCreateMaskObserverList(aFrame);
|
|
}
|
|
|
|
void
|
|
SVGObserverUtils::RemoveTextPathObserver(nsIFrame* aTextPathFrame)
|
|
{
|
|
aTextPathFrame->DeleteProperty(HrefAsTextPathProperty());
|
|
}
|
|
|
|
nsIFrame*
|
|
SVGObserverUtils::GetAndObserveTemplate(nsIFrame* aFrame,
|
|
HrefToTemplateCallback aGetHref)
|
|
{
|
|
SVGTemplateElementObserver* observer =
|
|
aFrame->GetProperty(HrefToTemplateProperty());
|
|
|
|
if (!observer) {
|
|
nsAutoString href;
|
|
aGetHref(href);
|
|
if (href.IsEmpty()) {
|
|
return nullptr; // no URL
|
|
}
|
|
|
|
// Convert href to an nsIURI
|
|
nsIContent* content = aFrame->GetContent();
|
|
nsCOMPtr<nsIURI> targetURI;
|
|
nsCOMPtr<nsIURI> base = content->GetBaseURI();
|
|
nsContentUtils::NewURIWithDocumentCharset(getter_AddRefs(targetURI), href,
|
|
content->GetUncomposedDoc(), base);
|
|
|
|
// There's no clear refererer policy spec about non-CSS SVG resource
|
|
// references. Bug 1415044 to investigate which referrer we should use.
|
|
RefPtr<URLAndReferrerInfo> target =
|
|
new URLAndReferrerInfo(targetURI,
|
|
content->OwnerDoc()->GetDocumentURI(),
|
|
content->OwnerDoc()->GetReferrerPolicy());
|
|
|
|
observer = GetEffectProperty(target, aFrame, HrefToTemplateProperty());
|
|
}
|
|
|
|
return observer ? observer->GetAndObserveReferencedFrame() : nullptr;
|
|
}
|
|
|
|
void
|
|
SVGObserverUtils::RemoveTemplateObserver(nsIFrame* aFrame)
|
|
{
|
|
aFrame->DeleteProperty(HrefToTemplateProperty());
|
|
}
|
|
|
|
Element*
|
|
SVGObserverUtils::GetAndObserveBackgroundImage(nsIFrame* aFrame,
|
|
const nsAtom* aHref)
|
|
{
|
|
URIObserverHashtable *hashtable =
|
|
aFrame->GetProperty(BackgroundImageProperty());
|
|
if (!hashtable) {
|
|
hashtable = new URIObserverHashtable();
|
|
aFrame->SetProperty(BackgroundImageProperty(), hashtable);
|
|
}
|
|
|
|
nsAutoString elementId =
|
|
NS_LITERAL_STRING("#") + nsDependentAtomString(aHref);
|
|
nsCOMPtr<nsIURI> targetURI;
|
|
nsCOMPtr<nsIURI> base = aFrame->GetContent()->GetBaseURI();
|
|
nsContentUtils::NewURIWithDocumentCharset(
|
|
getter_AddRefs(targetURI),
|
|
elementId,
|
|
aFrame->GetContent()->GetUncomposedDoc(),
|
|
base);
|
|
RefPtr<URLAndReferrerInfo> url = new URLAndReferrerInfo(
|
|
targetURI,
|
|
aFrame->GetContent()->OwnerDoc()->GetDocumentURI(),
|
|
aFrame->GetContent()->OwnerDoc()->GetReferrerPolicy());
|
|
|
|
// XXXjwatt: this is broken - we're using the address of a new
|
|
// URLAndReferrerInfo as the hash key every time!
|
|
nsSVGPaintingProperty* observer =
|
|
static_cast<nsSVGPaintingProperty*>(hashtable->GetWeak(url));
|
|
if (!observer) {
|
|
observer = new nsSVGPaintingProperty(url, aFrame, /* aWatchImage */ true);
|
|
hashtable->Put(url, observer);
|
|
}
|
|
return observer->GetAndObserveReferencedElement();
|
|
}
|
|
|
|
nsSVGPaintServerFrame *
|
|
SVGObserverUtils::GetAndObservePaintServer(nsIFrame* aTargetFrame,
|
|
nsStyleSVGPaint nsStyleSVG::* aPaint)
|
|
{
|
|
// If we're looking at a frame within SVG text, then we need to look up
|
|
// to find the right frame to get the painting property off. We should at
|
|
// least look up past a text frame, and if the text frame's parent is the
|
|
// anonymous block frame, then we look up to its parent (the SVGTextFrame).
|
|
nsIFrame* frame = aTargetFrame;
|
|
if (frame->GetContent()->IsText()) {
|
|
frame = frame->GetParent();
|
|
nsIFrame* grandparent = frame->GetParent();
|
|
if (grandparent && grandparent->IsSVGTextFrame()) {
|
|
frame = grandparent;
|
|
}
|
|
}
|
|
|
|
const nsStyleSVG* svgStyle = frame->StyleSVG();
|
|
if ((svgStyle->*aPaint).Type() != eStyleSVGPaintType_Server)
|
|
return nullptr;
|
|
|
|
RefPtr<URLAndReferrerInfo> paintServerURL =
|
|
ResolveURLUsingLocalRef(frame,
|
|
(svgStyle->*aPaint).GetPaintServer());
|
|
|
|
MOZ_ASSERT(aPaint == &nsStyleSVG::mFill || aPaint == &nsStyleSVG::mStroke);
|
|
PaintingPropertyDescriptor propDesc = (aPaint == &nsStyleSVG::mFill) ?
|
|
FillProperty() : StrokeProperty();
|
|
nsSVGPaintingProperty *property =
|
|
GetPaintingProperty(paintServerURL, frame, propDesc);
|
|
if (!property)
|
|
return nullptr;
|
|
nsIFrame* result = property->GetAndObserveReferencedFrame();
|
|
if (!result)
|
|
return nullptr;
|
|
|
|
LayoutFrameType type = result->Type();
|
|
if (type != LayoutFrameType::SVGLinearGradient &&
|
|
type != LayoutFrameType::SVGRadialGradient &&
|
|
type != LayoutFrameType::SVGPattern)
|
|
return nullptr;
|
|
|
|
return static_cast<nsSVGPaintServerFrame*>(result);
|
|
}
|
|
|
|
void
|
|
SVGObserverUtils::UpdateEffects(nsIFrame* aFrame)
|
|
{
|
|
NS_ASSERTION(aFrame->GetContent()->IsElement(),
|
|
"aFrame's content should be an element");
|
|
|
|
aFrame->DeleteProperty(FilterProperty());
|
|
aFrame->DeleteProperty(MaskProperty());
|
|
aFrame->DeleteProperty(ClipPathProperty());
|
|
aFrame->DeleteProperty(MarkerStartProperty());
|
|
aFrame->DeleteProperty(MarkerMidProperty());
|
|
aFrame->DeleteProperty(MarkerEndProperty());
|
|
aFrame->DeleteProperty(FillProperty());
|
|
aFrame->DeleteProperty(StrokeProperty());
|
|
aFrame->DeleteProperty(BackgroundImageProperty());
|
|
|
|
// Ensure that the filter is repainted correctly
|
|
// We can't do that in OnRenderingChange as the referenced frame may
|
|
// not be valid
|
|
GetOrCreateFilterObserverListForCSS(aFrame);
|
|
|
|
if (aFrame->IsSVGGeometryFrame() &&
|
|
static_cast<SVGGeometryElement*>(aFrame->GetContent())->IsMarkable()) {
|
|
// Set marker properties here to avoid reference loops
|
|
RefPtr<URLAndReferrerInfo> markerURL =
|
|
GetMarkerURI(aFrame, &nsStyleSVG::mMarkerStart);
|
|
GetEffectProperty(markerURL, aFrame, MarkerStartProperty());
|
|
markerURL = GetMarkerURI(aFrame, &nsStyleSVG::mMarkerMid);
|
|
GetEffectProperty(markerURL, aFrame, MarkerMidProperty());
|
|
markerURL = GetMarkerURI(aFrame, &nsStyleSVG::mMarkerEnd);
|
|
GetEffectProperty(markerURL, aFrame, MarkerEndProperty());
|
|
}
|
|
}
|
|
|
|
void
|
|
SVGObserverUtils::AddRenderingObserver(Element* aElement,
|
|
SVGRenderingObserver* aObserver)
|
|
{
|
|
SVGRenderingObserverSet* observers = GetObserverSet(aElement);
|
|
if (!observers) {
|
|
observers = new SVGRenderingObserverSet();
|
|
if (!observers) {
|
|
return;
|
|
}
|
|
aElement->SetProperty(nsGkAtoms::renderingobserverset, observers,
|
|
nsINode::DeleteProperty<SVGRenderingObserverSet>);
|
|
}
|
|
aElement->SetHasRenderingObservers(true);
|
|
observers->Add(aObserver);
|
|
}
|
|
|
|
void
|
|
SVGObserverUtils::RemoveRenderingObserver(Element* aElement,
|
|
SVGRenderingObserver* aObserver)
|
|
{
|
|
SVGRenderingObserverSet* observers = GetObserverSet(aElement);
|
|
if (observers) {
|
|
NS_ASSERTION(observers->Contains(aObserver),
|
|
"removing observer from an element we're not observing?");
|
|
observers->Remove(aObserver);
|
|
if (observers->IsEmpty()) {
|
|
aElement->SetHasRenderingObservers(false);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
SVGObserverUtils::RemoveAllRenderingObservers(Element* aElement)
|
|
{
|
|
SVGRenderingObserverSet* observers = GetObserverSet(aElement);
|
|
if (observers) {
|
|
observers->RemoveAll();
|
|
aElement->SetHasRenderingObservers(false);
|
|
}
|
|
}
|
|
|
|
void
|
|
SVGObserverUtils::InvalidateRenderingObservers(nsIFrame* aFrame)
|
|
{
|
|
NS_ASSERTION(!aFrame->GetPrevContinuation(), "aFrame must be first continuation");
|
|
|
|
nsIContent* content = aFrame->GetContent();
|
|
if (!content || !content->IsElement())
|
|
return;
|
|
|
|
// If the rendering has changed, the bounds may well have changed too:
|
|
aFrame->DeleteProperty(nsSVGUtils::ObjectBoundingBoxProperty());
|
|
|
|
SVGRenderingObserverSet* observers = GetObserverSet(content->AsElement());
|
|
if (observers) {
|
|
observers->InvalidateAll();
|
|
return;
|
|
}
|
|
|
|
// Check ancestor SVG containers. The root frame cannot be of type
|
|
// eSVGContainer so we don't have to check f for null here.
|
|
for (nsIFrame *f = aFrame->GetParent();
|
|
f->IsFrameOfType(nsIFrame::eSVGContainer); f = f->GetParent()) {
|
|
if (f->GetContent()->IsElement()) {
|
|
observers = GetObserverSet(f->GetContent()->AsElement());
|
|
if (observers) {
|
|
observers->InvalidateAll();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
SVGObserverUtils::InvalidateDirectRenderingObservers(Element* aElement,
|
|
uint32_t aFlags /* = 0 */)
|
|
{
|
|
nsIFrame* frame = aElement->GetPrimaryFrame();
|
|
if (frame) {
|
|
// If the rendering has changed, the bounds may well have changed too:
|
|
frame->DeleteProperty(nsSVGUtils::ObjectBoundingBoxProperty());
|
|
}
|
|
|
|
if (aElement->HasRenderingObservers()) {
|
|
SVGRenderingObserverSet* observers = GetObserverSet(aElement);
|
|
if (observers) {
|
|
if (aFlags & INVALIDATE_REFLOW) {
|
|
observers->InvalidateAllForReflow();
|
|
} else {
|
|
observers->InvalidateAll();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
SVGObserverUtils::InvalidateDirectRenderingObservers(nsIFrame* aFrame,
|
|
uint32_t aFlags /* = 0 */)
|
|
{
|
|
nsIContent* content = aFrame->GetContent();
|
|
if (content && content->IsElement()) {
|
|
InvalidateDirectRenderingObservers(content->AsElement(), aFlags);
|
|
}
|
|
}
|
|
|
|
already_AddRefed<nsIURI>
|
|
SVGObserverUtils::GetBaseURLForLocalRef(nsIContent* content, nsIURI* aDocURI)
|
|
{
|
|
MOZ_ASSERT(content);
|
|
|
|
// For a local-reference URL, resolve that fragment against the current
|
|
// document that relative URLs are resolved against.
|
|
nsCOMPtr<nsIURI> baseURI = content->OwnerDoc()->GetDocumentURI();
|
|
|
|
nsCOMPtr<nsIURI> originalURI;
|
|
// Content is in a shadow tree. If this URL was specified in the subtree
|
|
// referenced by the <use>(or -moz-binding) element, and that subtree came
|
|
// from a separate resource document, then we want the fragment-only URL
|
|
// to resolve to an element from the resource document. Otherwise, the
|
|
// URL was specified somewhere in the document with the <use> element, and
|
|
// we want the fragment-only URL to resolve to an element in that document.
|
|
if (SVGUseElement* use = content->GetContainingSVGUseShadowHost()) {
|
|
originalURI = use->GetSourceDocURI();
|
|
} else if (content->IsInAnonymousSubtree()) {
|
|
nsIContent* bindingParent = content->GetBindingParent();
|
|
|
|
if (bindingParent) {
|
|
nsXBLBinding* binding = bindingParent->GetXBLBinding();
|
|
if (binding) {
|
|
originalURI = binding->GetSourceDocURI();
|
|
} else {
|
|
MOZ_ASSERT(content->IsInNativeAnonymousSubtree(),
|
|
"a non-native anonymous tree which is not from "
|
|
"an XBL binding?");
|
|
}
|
|
}
|
|
}
|
|
|
|
if (originalURI) {
|
|
bool isEqualsExceptRef = false;
|
|
aDocURI->EqualsExceptRef(originalURI, &isEqualsExceptRef);
|
|
if (isEqualsExceptRef) {
|
|
return originalURI.forget();
|
|
}
|
|
}
|
|
|
|
return baseURI.forget();
|
|
}
|
|
|
|
already_AddRefed<URLAndReferrerInfo>
|
|
SVGObserverUtils::GetFilterURI(nsIFrame* aFrame, const nsStyleFilter& aFilter)
|
|
{
|
|
MOZ_ASSERT(aFrame->StyleEffects()->mFilters.Length());
|
|
MOZ_ASSERT(aFilter.GetType() == NS_STYLE_FILTER_URL);
|
|
|
|
return ResolveURLUsingLocalRef(aFrame, aFilter.GetURL());
|
|
}
|
|
|
|
} // namespace mozilla
|
|
|