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tenfourfox/layout/svg/nsSVGEffects.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// Main header first:
#include "nsSVGEffects.h"
// Keep others in (case-insensitive) order:
#include "nsCSSFrameConstructor.h"
#include "nsISupportsImpl.h"
#include "nsSVGClipPathFrame.h"
#include "nsSVGPaintServerFrame.h"
#include "nsSVGPathGeometryElement.h"
#include "nsSVGFilterFrame.h"
#include "nsSVGMaskFrame.h"
#include "nsIReflowCallback.h"
#include "RestyleManager.h"
#include "nsCycleCollectionParticipant.h"
using namespace mozilla;
using namespace mozilla::dom;
void
nsSVGRenderingObserver::StartListening()
{
Element* target = GetTarget();
if (target) {
target->AddMutationObserver(this);
}
}
void
nsSVGRenderingObserver::StopListening()
{
Element* target = GetTarget();
if (target) {
target->RemoveMutationObserver(this);
if (mInObserverList) {
nsSVGEffects::RemoveRenderingObserver(target, this);
mInObserverList = false;
}
}
NS_ASSERTION(!mInObserverList, "still in an observer list?");
}
static nsSVGRenderingObserverList *
GetObserverList(Element *aElement)
{
return static_cast<nsSVGRenderingObserverList*>
(aElement->GetProperty(nsGkAtoms::renderingobserverlist));
}
Element*
nsSVGRenderingObserver::GetReferencedElement()
{
Element* target = GetTarget();
#ifdef DEBUG
if (target) {
nsSVGRenderingObserverList *observerList = GetObserverList(target);
bool inObserverList = observerList && observerList->Contains(this);
NS_ASSERTION(inObserverList == mInObserverList, "failed to track whether we're in our referenced element's observer list!");
} else {
NS_ASSERTION(!mInObserverList, "In whose observer list are we, then?");
}
#endif
if (target && !mInObserverList) {
nsSVGEffects::AddRenderingObserver(target, this);
mInObserverList = true;
}
return target;
}
nsIFrame*
nsSVGRenderingObserver::GetReferencedFrame()
{
Element* referencedElement = GetReferencedElement();
return referencedElement ? referencedElement->GetPrimaryFrame() : nullptr;
}
nsIFrame*
nsSVGRenderingObserver::GetReferencedFrame(nsIAtom* aFrameType, bool* aOK)
{
nsIFrame* frame = GetReferencedFrame();
if (frame) {
if (frame->GetType() == aFrameType)
return frame;
if (aOK) {
*aOK = false;
}
}
return nullptr;
}
void
nsSVGRenderingObserver::InvalidateViaReferencedElement()
{
mInObserverList = false;
DoUpdate();
}
void
nsSVGRenderingObserver::NotifyEvictedFromRenderingObserverList()
{
mInObserverList = false; // We've been removed from rendering-obs. list.
StopListening(); // Remove ourselves from mutation-obs. list.
}
void
nsSVGRenderingObserver::AttributeChanged(nsIDocument* aDocument,
dom::Element* aElement,
int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType,
const nsAttrValue* aOldValue)
{
// An attribute belonging to the element that we are observing *or one of its
// descendants* has changed.
//
// In the case of observing a gradient element, say, we want to know if any
// of its 'stop' element children change, but we don't actually want to do
// anything for changes to SMIL element children, for example. Maybe it's not
// worth having logic to optimize for that, but in most cases it could be a
// small check?
//
// XXXjwatt: do we really want to blindly break the link between our
// observers and ourselves for all attribute changes? For non-ID changes
// surely that is unnecessary.
DoUpdate();
}
void
nsSVGRenderingObserver::ContentAppended(nsIDocument *aDocument,
nsIContent *aContainer,
nsIContent *aFirstNewContent,
int32_t /* unused */)
{
DoUpdate();
}
void
nsSVGRenderingObserver::ContentInserted(nsIDocument *aDocument,
nsIContent *aContainer,
nsIContent *aChild,
int32_t /* unused */)
{
DoUpdate();
}
void
nsSVGRenderingObserver::ContentRemoved(nsIDocument *aDocument,
nsIContent *aContainer,
nsIContent *aChild,
int32_t aIndexInContainer,
nsIContent *aPreviousSibling)
{
DoUpdate();
}
/**
* Note that in the current setup there are two separate observer lists.
*
* In nsSVGIDRenderingObserver's ctor, the new object adds itself to the
* mutation observer list maintained by the referenced element. In this way the
* nsSVGIDRenderingObserver is notified if there are any attribute or content
* tree changes to the element or any of its *descendants*.
*
* In nsSVGIDRenderingObserver::GetReferencedElement() the
* nsSVGIDRenderingObserver object also adds itself to an
* nsSVGRenderingObserverList object belonging to the referenced
* element.
*
* XXX: it would be nice to have a clear and concise executive summary of the
* benefits/necessity of maintaining a second observer list.
*/
nsSVGIDRenderingObserver::nsSVGIDRenderingObserver(nsIURI* aURI,
nsIContent* aObservingContent,
bool aReferenceImage)
: mElement(this)
{
// Start watching the target element
mElement.Reset(aObservingContent, aURI, true, aReferenceImage);
StartListening();
}
nsSVGIDRenderingObserver::~nsSVGIDRenderingObserver()
{
StopListening();
}
void
nsSVGIDRenderingObserver::DoUpdate()
{
if (mElement.get() && mInObserverList) {
nsSVGEffects::RemoveRenderingObserver(mElement.get(), this);
mInObserverList = false;
}
}
void
nsSVGFrameReferenceFromProperty::Detach()
{
mFrame = nullptr;
mFramePresShell = nullptr;
}
nsIFrame*
nsSVGFrameReferenceFromProperty::Get()
{
if (mFramePresShell && mFramePresShell->IsDestroying()) {
// mFrame is no longer valid.
Detach();
}
return mFrame;
}
NS_IMPL_ISUPPORTS(nsSVGRenderingObserverProperty, nsIMutationObserver)
void
nsSVGRenderingObserverProperty::DoUpdate()
{
nsSVGIDRenderingObserver::DoUpdate();
nsIFrame* frame = mFrameReference.Get();
if (frame && frame->IsFrameOfType(nsIFrame::eSVG)) {
// Changes should propagate out to things that might be observing
// the referencing frame or its ancestors.
nsLayoutUtils::PostRestyleEvent(
frame->GetContent()->AsElement(), nsRestyleHint(0),
nsChangeHint_InvalidateRenderingObservers);
}
}
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsSVGFilterReference)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsSVGFilterReference)
NS_IMPL_CYCLE_COLLECTION_CLASS(nsSVGFilterReference)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsSVGFilterReference)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mElement)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsSVGFilterReference)
tmp->StopListening();
NS_IMPL_CYCLE_COLLECTION_UNLINK(mElement);
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsSVGFilterReference)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsSVGIDRenderingObserver)
NS_INTERFACE_MAP_ENTRY(nsIMutationObserver)
NS_INTERFACE_MAP_ENTRY(nsISVGFilterReference)
NS_INTERFACE_MAP_END
nsSVGFilterFrame *
nsSVGFilterReference::GetFilterFrame()
{
return static_cast<nsSVGFilterFrame *>
(GetReferencedFrame(nsGkAtoms::svgFilterFrame, nullptr));
}
void
nsSVGFilterReference::DoUpdate()
{
nsSVGIDRenderingObserver::DoUpdate();
if (mFilterChainObserver) {
mFilterChainObserver->Invalidate();
}
}
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsSVGFilterChainObserver)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsSVGFilterChainObserver)
NS_IMPL_CYCLE_COLLECTION_CLASS(nsSVGFilterChainObserver)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsSVGFilterChainObserver)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mReferences)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsSVGFilterChainObserver)
tmp->DetachReferences();
NS_IMPL_CYCLE_COLLECTION_UNLINK(mReferences);
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsSVGFilterChainObserver)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
nsSVGFilterChainObserver::nsSVGFilterChainObserver(const nsTArray<nsStyleFilter>& aFilters,
nsIContent* aFilteredElement)
{
for (uint32_t i = 0; i < aFilters.Length(); i++) {
if (aFilters[i].GetType() != NS_STYLE_FILTER_URL)
continue;
RefPtr<nsSVGFilterReference> reference =
new nsSVGFilterReference(aFilters[i].GetURL(), aFilteredElement, this);
mReferences.AppendElement(reference);
}
}
nsSVGFilterChainObserver::~nsSVGFilterChainObserver()
{
DetachReferences();
}
bool
nsSVGFilterChainObserver::ReferencesValidResources()
{
for (uint32_t i = 0; i < mReferences.Length(); i++) {
if (!mReferences[i]->ReferencesValidResource())
return false;
}
return true;
}
bool
nsSVGFilterChainObserver::IsInObserverLists() const
{
for (uint32_t i = 0; i < mReferences.Length(); i++) {
if (!mReferences[i]->IsInObserverList())
return false;
}
return true;
}
void
nsSVGFilterProperty::DoUpdate()
{
nsIFrame* frame = mFrameReference.Get();
if (!frame)
return;
// Repaint asynchronously in case the filter frame is being torn down
nsChangeHint changeHint =
nsChangeHint(nsChangeHint_RepaintFrame);
if (frame && frame->IsFrameOfType(nsIFrame::eSVG)) {
// Changes should propagate out to things that might be observing
// the referencing frame or its ancestors.
NS_UpdateHint(changeHint, nsChangeHint_InvalidateRenderingObservers);
}
// Don't need to request UpdateOverflow if we're being reflowed.
if (!(frame->GetStateBits() & NS_FRAME_IN_REFLOW)) {
NS_UpdateHint(changeHint, nsChangeHint_UpdateOverflow);
}
frame->PresContext()->RestyleManager()->PostRestyleEvent(
frame->GetContent()->AsElement(), nsRestyleHint(0), changeHint);
}
void
nsSVGMarkerProperty::DoUpdate()
{
nsSVGRenderingObserverProperty::DoUpdate();
nsIFrame* frame = mFrameReference.Get();
if (!frame)
return;
NS_ASSERTION(frame->IsFrameOfType(nsIFrame::eSVG), "SVG frame expected");
// Repaint asynchronously in case the marker frame is being torn down
nsChangeHint changeHint =
nsChangeHint(nsChangeHint_RepaintFrame);
// Don't need to request ReflowFrame if we're being reflowed.
if (!(frame->GetStateBits() & NS_FRAME_IN_REFLOW)) {
NS_UpdateHint(changeHint, nsChangeHint_InvalidateRenderingObservers);
// XXXjwatt: We need to unify SVG into standard reflow so we can just use
// nsChangeHint_NeedReflow | nsChangeHint_NeedDirtyReflow here.
// XXXSDL KILL THIS!!!
nsSVGUtils::ScheduleReflowSVG(frame);
}
frame->PresContext()->RestyleManager()->PostRestyleEvent(
frame->GetContent()->AsElement(), nsRestyleHint(0), changeHint);
}
bool
nsSVGTextPathProperty::TargetIsValid()
{
Element* target = GetTarget();
return target && target->IsSVGElement(nsGkAtoms::path);
}
void
nsSVGTextPathProperty::DoUpdate()
{
nsSVGRenderingObserverProperty::DoUpdate();
nsIFrame* frame = mFrameReference.Get();
if (!frame)
return;
NS_ASSERTION(frame->IsFrameOfType(nsIFrame::eSVG) || frame->IsSVGText(),
"SVG frame expected");
// Avoid getting into an infinite loop of reflows if the <textPath> is
// pointing to one of its ancestors. TargetIsValid returns true iff
// the target element is a <path> element, and we would not have this
// nsSVGTextPathProperty if this <textPath> were a descendant of the
// target <path>.
//
// Note that we still have to post the restyle event when we
// change from being valid to invalid, so that mPositions on the
// SVGTextFrame gets updated, skipping the <textPath>, ensuring
// that nothing gets painted for that element.
bool nowValid = TargetIsValid();
if (!mValid && !nowValid) {
// Just return if we were previously invalid, and are still invalid.
return;
}
mValid = nowValid;
// Repaint asynchronously in case the path frame is being torn down
nsChangeHint changeHint =
nsChangeHint(nsChangeHint_RepaintFrame | nsChangeHint_UpdateTextPath);
frame->PresContext()->RestyleManager()->PostRestyleEvent(
frame->GetContent()->AsElement(), nsRestyleHint(0), changeHint);
}
static void
InvalidateAllContinuations(nsIFrame* aFrame)
{
for (nsIFrame* f = aFrame; f;
f = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(f)) {
f->InvalidateFrame();
}
}
void
nsSVGPaintingProperty::DoUpdate()
{
nsSVGRenderingObserverProperty::DoUpdate();
nsIFrame* frame = mFrameReference.Get();
if (!frame)
return;
if (frame->GetStateBits() & NS_FRAME_SVG_LAYOUT) {
nsLayoutUtils::PostRestyleEvent(
frame->GetContent()->AsElement(), nsRestyleHint(0),
nsChangeHint_InvalidateRenderingObservers);
frame->InvalidateFrameSubtree();
} else {
InvalidateAllContinuations(frame);
}
}
static nsSVGRenderingObserver *
CreateMarkerProperty(nsIURI *aURI, nsIFrame *aFrame, bool aReferenceImage)
{ return new nsSVGMarkerProperty(aURI, aFrame, aReferenceImage); }
static nsSVGRenderingObserver *
CreateTextPathProperty(nsIURI *aURI, nsIFrame *aFrame, bool aReferenceImage)
{ return new nsSVGTextPathProperty(aURI, aFrame, aReferenceImage); }
static nsSVGRenderingObserver *
CreatePaintingProperty(nsIURI *aURI, nsIFrame *aFrame, bool aReferenceImage)
{ return new nsSVGPaintingProperty(aURI, aFrame, aReferenceImage); }
static nsSVGRenderingObserver *
GetEffectProperty(nsIURI *aURI, nsIFrame *aFrame,
const FramePropertyDescriptor *aProperty,
nsSVGRenderingObserver * (* aCreate)(nsIURI *, nsIFrame *, bool))
{
if (!aURI)
return nullptr;
FrameProperties props = aFrame->Properties();
nsSVGRenderingObserver *prop =
static_cast<nsSVGRenderingObserver*>(props.Get(aProperty));
if (prop)
return prop;
prop = aCreate(aURI, aFrame, false);
if (!prop)
return nullptr;
NS_ADDREF(prop);
props.Set(aProperty, static_cast<nsISupports*>(prop));
return prop;
}
static nsSVGFilterProperty*
GetOrCreateFilterProperty(nsIFrame *aFrame)
{
const nsStyleSVGReset* style = aFrame->StyleSVGReset();
if (!style->HasFilters())
return nullptr;
FrameProperties props = aFrame->Properties();
nsSVGFilterProperty *prop =
static_cast<nsSVGFilterProperty*>(props.Get(nsSVGEffects::FilterProperty()));
if (prop)
return prop;
prop = new nsSVGFilterProperty(style->mFilters, aFrame);
if (!prop)
return nullptr;
NS_ADDREF(prop);
props.Set(nsSVGEffects::FilterProperty(), static_cast<nsISupports*>(prop));
return prop;
}
nsSVGMarkerProperty *
nsSVGEffects::GetMarkerProperty(nsIURI *aURI, nsIFrame *aFrame,
const FramePropertyDescriptor *aProp)
{
MOZ_ASSERT(aFrame->GetType() == nsGkAtoms::svgPathGeometryFrame &&
static_cast<nsSVGPathGeometryElement*>(aFrame->GetContent())->IsMarkable(),
"Bad frame");
return static_cast<nsSVGMarkerProperty*>(
GetEffectProperty(aURI, aFrame, aProp, CreateMarkerProperty));
}
nsSVGTextPathProperty *
nsSVGEffects::GetTextPathProperty(nsIURI *aURI, nsIFrame *aFrame,
const FramePropertyDescriptor *aProp)
{
return static_cast<nsSVGTextPathProperty*>(
GetEffectProperty(aURI, aFrame, aProp, CreateTextPathProperty));
}
nsSVGPaintingProperty *
nsSVGEffects::GetPaintingProperty(nsIURI *aURI, nsIFrame *aFrame,
const FramePropertyDescriptor *aProp)
{
return static_cast<nsSVGPaintingProperty*>(
GetEffectProperty(aURI, aFrame, aProp, CreatePaintingProperty));
}
static nsSVGRenderingObserver *
GetEffectPropertyForURI(nsIURI *aURI, nsIFrame *aFrame,
const FramePropertyDescriptor *aProperty,
nsSVGRenderingObserver * (* aCreate)(nsIURI *, nsIFrame *, bool))
{
if (!aURI)
return nullptr;
FrameProperties props = aFrame->Properties();
nsSVGEffects::URIObserverHashtable *hashtable =
static_cast<nsSVGEffects::URIObserverHashtable*>(props.Get(aProperty));
if (!hashtable) {
hashtable = new nsSVGEffects::URIObserverHashtable();
props.Set(aProperty, hashtable);
}
nsSVGRenderingObserver* prop =
static_cast<nsSVGRenderingObserver*>(hashtable->GetWeak(aURI));
if (!prop) {
bool watchImage = aProperty == nsSVGEffects::BackgroundImageProperty();
prop = aCreate(aURI, aFrame, watchImage);
hashtable->Put(aURI, prop);
}
return prop;
}
nsSVGPaintingProperty *
nsSVGEffects::GetPaintingPropertyForURI(nsIURI *aURI, nsIFrame *aFrame,
const FramePropertyDescriptor *aProp)
{
return static_cast<nsSVGPaintingProperty*>(
GetEffectPropertyForURI(aURI, aFrame, aProp, CreatePaintingProperty));
}
nsSVGEffects::EffectProperties
nsSVGEffects::GetEffectProperties(nsIFrame *aFrame)
{
NS_ASSERTION(!aFrame->GetPrevContinuation(), "aFrame should be first continuation");
EffectProperties result;
const nsStyleSVGReset *style = aFrame->StyleSVGReset();
result.mFilter = GetOrCreateFilterProperty(aFrame);
if (style->mClipPath.GetType() == NS_STYLE_CLIP_PATH_URL) {
result.mClipPath =
GetPaintingProperty(style->mClipPath.GetURL(), aFrame, ClipPathProperty());
} else {
result.mClipPath = nullptr;
}
result.mMask =
GetPaintingProperty(style->mMask, aFrame, MaskProperty());
return result;
}
nsSVGPaintServerFrame *
nsSVGEffects::GetPaintServer(nsIFrame *aTargetFrame, const nsStyleSVGPaint *aPaint,
const FramePropertyDescriptor *aType)
{
if (aPaint->mType != eStyleSVGPaintType_Server)
return nullptr;
// 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()->IsNodeOfType(nsINode::eTEXT)) {
frame = frame->GetParent();
nsIFrame* grandparent = frame->GetParent();
if (grandparent && grandparent->GetType() == nsGkAtoms::svgTextFrame) {
frame = grandparent;
}
}
nsSVGPaintingProperty *property =
nsSVGEffects::GetPaintingProperty(aPaint->mPaint.mPaintServer, frame, aType);
if (!property)
return nullptr;
nsIFrame *result = property->GetReferencedFrame();
if (!result)
return nullptr;
nsIAtom *type = result->GetType();
if (type != nsGkAtoms::svgLinearGradientFrame &&
type != nsGkAtoms::svgRadialGradientFrame &&
type != nsGkAtoms::svgPatternFrame)
return nullptr;
return static_cast<nsSVGPaintServerFrame*>(result);
}
nsSVGClipPathFrame *
nsSVGEffects::EffectProperties::GetClipPathFrame(bool *aOK)
{
if (!mClipPath)
return nullptr;
nsSVGClipPathFrame *frame = static_cast<nsSVGClipPathFrame *>
(mClipPath->GetReferencedFrame(nsGkAtoms::svgClipPathFrame, aOK));
if (frame && aOK && *aOK) {
*aOK = frame->IsValid();
}
return frame;
}
nsSVGMaskFrame *
nsSVGEffects::EffectProperties::GetMaskFrame(bool *aOK)
{
if (!mMask)
return nullptr;
return static_cast<nsSVGMaskFrame *>
(mMask->GetReferencedFrame(nsGkAtoms::svgMaskFrame, aOK));
}
void
nsSVGEffects::UpdateEffects(nsIFrame *aFrame)
{
NS_ASSERTION(aFrame->GetContent()->IsElement(),
"aFrame's content should be an element");
FrameProperties props = aFrame->Properties();
props.Delete(FilterProperty());
props.Delete(MaskProperty());
props.Delete(ClipPathProperty());
props.Delete(MarkerBeginProperty());
props.Delete(MarkerMiddleProperty());
props.Delete(MarkerEndProperty());
props.Delete(FillProperty());
props.Delete(StrokeProperty());
props.Delete(BackgroundImageProperty());
// Ensure that the filter is repainted correctly
// We can't do that in DoUpdate as the referenced frame may not be valid
GetOrCreateFilterProperty(aFrame);
if (aFrame->GetType() == nsGkAtoms::svgPathGeometryFrame &&
static_cast<nsSVGPathGeometryElement*>(aFrame->GetContent())->IsMarkable()) {
// Set marker properties here to avoid reference loops
const nsStyleSVG *style = aFrame->StyleSVG();
GetEffectProperty(style->mMarkerStart, aFrame, MarkerBeginProperty(),
CreateMarkerProperty);
GetEffectProperty(style->mMarkerMid, aFrame, MarkerMiddleProperty(),
CreateMarkerProperty);
GetEffectProperty(style->mMarkerEnd, aFrame, MarkerEndProperty(),
CreateMarkerProperty);
}
}
nsSVGFilterProperty *
nsSVGEffects::GetFilterProperty(nsIFrame *aFrame)
{
NS_ASSERTION(!aFrame->GetPrevContinuation(), "aFrame should be first continuation");
if (!aFrame->StyleSVGReset()->HasFilters())
return nullptr;
return static_cast<nsSVGFilterProperty *>
(aFrame->Properties().Get(FilterProperty()));
}
void
nsSVGRenderingObserverList::InvalidateAll()
{
if (mObservers.Count() == 0)
return;
nsAutoTArray<nsSVGRenderingObserver*,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]->InvalidateViaReferencedElement();
}
}
void
nsSVGRenderingObserverList::InvalidateAllForReflow()
{
if (mObservers.Count() == 0)
return;
nsAutoTArray<nsSVGRenderingObserver*,10> observers;
for (auto it = mObservers.Iter(); !it.Done(); it.Next()) {
nsSVGRenderingObserver* obs = it.Get()->GetKey();
if (obs->ObservesReflow()) {
observers.AppendElement(obs);
it.Remove();
}
}
for (uint32_t i = 0; i < observers.Length(); ++i) {
observers[i]->InvalidateViaReferencedElement();
}
}
void
nsSVGRenderingObserverList::RemoveAll()
{
nsAutoTArray<nsSVGRenderingObserver*,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]->NotifyEvictedFromRenderingObserverList();
}
}
void
nsSVGEffects::AddRenderingObserver(Element *aElement, nsSVGRenderingObserver *aObserver)
{
nsSVGRenderingObserverList *observerList = GetObserverList(aElement);
if (!observerList) {
observerList = new nsSVGRenderingObserverList();
if (!observerList)
return;
aElement->SetProperty(nsGkAtoms::renderingobserverlist, observerList,
nsINode::DeleteProperty<nsSVGRenderingObserverList>);
}
aElement->SetHasRenderingObservers(true);
observerList->Add(aObserver);
}
void
nsSVGEffects::RemoveRenderingObserver(Element *aElement, nsSVGRenderingObserver *aObserver)
{
nsSVGRenderingObserverList *observerList = GetObserverList(aElement);
if (observerList) {
NS_ASSERTION(observerList->Contains(aObserver),
"removing observer from an element we're not observing?");
observerList->Remove(aObserver);
if (observerList->IsEmpty()) {
aElement->SetHasRenderingObservers(false);
}
}
}
void
nsSVGEffects::RemoveAllRenderingObservers(Element *aElement)
{
nsSVGRenderingObserverList *observerList = GetObserverList(aElement);
if (observerList) {
observerList->RemoveAll();
aElement->SetHasRenderingObservers(false);
}
}
void
nsSVGEffects::InvalidateRenderingObservers(nsIFrame *aFrame)
{
NS_ASSERTION(!aFrame->GetPrevContinuation(), "aFrame must be first continuation");
if (!aFrame->GetContent()->IsElement())
return;
// If the rendering has changed, the bounds may well have changed too:
aFrame->Properties().Delete(nsSVGUtils::ObjectBoundingBoxProperty());
nsSVGRenderingObserverList *observerList =
GetObserverList(aFrame->GetContent()->AsElement());
if (observerList) {
observerList->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()) {
observerList = GetObserverList(f->GetContent()->AsElement());
if (observerList) {
observerList->InvalidateAll();
return;
}
}
}
}
void
nsSVGEffects::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->Properties().Delete(nsSVGUtils::ObjectBoundingBoxProperty());
}
if (aElement->HasRenderingObservers()) {
nsSVGRenderingObserverList *observerList = GetObserverList(aElement);
if (observerList) {
if (aFlags & INVALIDATE_REFLOW) {
observerList->InvalidateAllForReflow();
} else {
observerList->InvalidateAll();
}
}
}
}
void
nsSVGEffects::InvalidateDirectRenderingObservers(nsIFrame *aFrame, uint32_t aFlags /* = 0 */)
{
if (aFrame->GetContent() && aFrame->GetContent()->IsElement()) {
InvalidateDirectRenderingObservers(aFrame->GetContent()->AsElement(), aFlags);
}
}
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