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Diffstat (limited to '')
| -rw-r--r-- | dom/svg/SVGSVGElement.cpp | 585 |
1 files changed, 585 insertions, 0 deletions
diff --git a/dom/svg/SVGSVGElement.cpp b/dom/svg/SVGSVGElement.cpp new file mode 100644 index 0000000000..070bfa2bf0 --- /dev/null +++ b/dom/svg/SVGSVGElement.cpp @@ -0,0 +1,585 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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/. */ + +#include "mozilla/dom/SVGSVGElement.h" + +#include "mozilla/ContentEvents.h" +#include "mozilla/dom/BindContext.h" +#include "mozilla/dom/DOMMatrix.h" +#include "mozilla/dom/SVGSVGElementBinding.h" +#include "mozilla/dom/SVGMatrix.h" +#include "mozilla/dom/SVGRect.h" +#include "mozilla/dom/SVGViewElement.h" +#include "mozilla/EventDispatcher.h" +#include "mozilla/ISVGDisplayableFrame.h" +#include "mozilla/PresShell.h" +#include "mozilla/SMILAnimationController.h" +#include "mozilla/SMILTimeContainer.h" +#include "mozilla/SVGUtils.h" + +#include "DOMSVGAngle.h" +#include "DOMSVGLength.h" +#include "DOMSVGNumber.h" +#include "DOMSVGPoint.h" +#include "nsFrameSelection.h" +#include "nsIFrame.h" +#include "ISVGSVGFrame.h" + +NS_IMPL_NS_NEW_SVG_ELEMENT_CHECK_PARSER(SVG) + +using namespace mozilla::gfx; + +namespace mozilla::dom { + +using namespace SVGPreserveAspectRatio_Binding; +using namespace SVGSVGElement_Binding; + +SVGEnumMapping SVGSVGElement::sZoomAndPanMap[] = { + {nsGkAtoms::disable, SVG_ZOOMANDPAN_DISABLE}, + {nsGkAtoms::magnify, SVG_ZOOMANDPAN_MAGNIFY}, + {nullptr, 0}}; + +SVGElement::EnumInfo SVGSVGElement::sEnumInfo[1] = { + {nsGkAtoms::zoomAndPan, sZoomAndPanMap, SVG_ZOOMANDPAN_MAGNIFY}}; + +JSObject* SVGSVGElement::WrapNode(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) { + return SVGSVGElement_Binding::Wrap(aCx, this, aGivenProto); +} + +//---------------------------------------------------------------------- +// nsISupports methods + +NS_IMPL_CYCLE_COLLECTION_CLASS(SVGSVGElement) + +NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(SVGSVGElement, + SVGSVGElementBase) + if (tmp->mTimedDocumentRoot) { + tmp->mTimedDocumentRoot->Unlink(); + } +NS_IMPL_CYCLE_COLLECTION_UNLINK_END +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(SVGSVGElement, + SVGSVGElementBase) + if (tmp->mTimedDocumentRoot) { + tmp->mTimedDocumentRoot->Traverse(&cb); + } +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END + +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(SVGSVGElement) + NS_INTERFACE_MAP_ENTRY_CONCRETE(SVGSVGElement) +NS_INTERFACE_MAP_END_INHERITING(SVGSVGElementBase); + +NS_IMPL_ADDREF_INHERITED(SVGSVGElement, SVGSVGElementBase) +NS_IMPL_RELEASE_INHERITED(SVGSVGElement, SVGSVGElementBase) + +SVGView::SVGView() { + mZoomAndPan.Init(SVGSVGElement::ZOOMANDPAN, SVG_ZOOMANDPAN_MAGNIFY); + mViewBox.Init(); + mPreserveAspectRatio.Init(); +} + +//---------------------------------------------------------------------- +// Implementation + +SVGSVGElement::SVGSVGElement( + already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo, + FromParser aFromParser) + : SVGSVGElementBase(std::move(aNodeInfo)), + mCurrentTranslate(0.0f, 0.0f), + mCurrentScale(1.0f), + mStartAnimationOnBindToTree(aFromParser == NOT_FROM_PARSER || + aFromParser == FROM_PARSER_FRAGMENT || + aFromParser == FROM_PARSER_XSLT), + mImageNeedsTransformInvalidation(false) {} + +//---------------------------------------------------------------------- +// nsINode methods + +NS_IMPL_ELEMENT_CLONE_WITH_INIT_AND_PARSER(SVGSVGElement) + +//---------------------------------------------------------------------- +// nsIDOMSVGSVGElement methods: + +already_AddRefed<DOMSVGAnimatedLength> SVGSVGElement::X() { + return mLengthAttributes[ATTR_X].ToDOMAnimatedLength(this); +} + +already_AddRefed<DOMSVGAnimatedLength> SVGSVGElement::Y() { + return mLengthAttributes[ATTR_Y].ToDOMAnimatedLength(this); +} + +already_AddRefed<DOMSVGAnimatedLength> SVGSVGElement::Width() { + return mLengthAttributes[ATTR_WIDTH].ToDOMAnimatedLength(this); +} + +already_AddRefed<DOMSVGAnimatedLength> SVGSVGElement::Height() { + return mLengthAttributes[ATTR_HEIGHT].ToDOMAnimatedLength(this); +} + +bool SVGSVGElement::UseCurrentView() const { + return mSVGView || mCurrentViewID; +} + +float SVGSVGElement::CurrentScale() const { return mCurrentScale; } + +#define CURRENT_SCALE_MAX 16.0f +#define CURRENT_SCALE_MIN 0.0625f + +void SVGSVGElement::SetCurrentScale(float aCurrentScale) { + // Prevent bizarre behaviour and maxing out of CPU and memory by clamping + aCurrentScale = clamped(aCurrentScale, CURRENT_SCALE_MIN, CURRENT_SCALE_MAX); + + if (aCurrentScale == mCurrentScale) { + return; + } + mCurrentScale = aCurrentScale; + + if (IsRootSVGSVGElement()) { + InvalidateTransformNotifyFrame(); + } +} + +already_AddRefed<DOMSVGPoint> SVGSVGElement::CurrentTranslate() { + return DOMSVGPoint::GetTranslateTearOff(&mCurrentTranslate, this); +} + +uint32_t SVGSVGElement::SuspendRedraw(uint32_t max_wait_milliseconds) { + // suspendRedraw is a no-op in Mozilla, so it doesn't matter what + // we return + return 1; +} + +void SVGSVGElement::UnsuspendRedraw(uint32_t suspend_handle_id) { + // no-op +} + +void SVGSVGElement::UnsuspendRedrawAll() { + // no-op +} + +void SVGSVGElement::ForceRedraw() { + // no-op +} + +void SVGSVGElement::PauseAnimations() { + if (mTimedDocumentRoot) { + mTimedDocumentRoot->Pause(SMILTimeContainer::PAUSE_SCRIPT); + } + // else we're not the outermost <svg> or not bound to a tree, so silently fail +} + +void SVGSVGElement::UnpauseAnimations() { + if (mTimedDocumentRoot) { + mTimedDocumentRoot->Resume(SMILTimeContainer::PAUSE_SCRIPT); + } + // else we're not the outermost <svg> or not bound to a tree, so silently fail +} + +bool SVGSVGElement::AnimationsPaused() { + SMILTimeContainer* root = GetTimedDocumentRoot(); + return root && root->IsPausedByType(SMILTimeContainer::PAUSE_SCRIPT); +} + +float SVGSVGElement::GetCurrentTimeAsFloat() { + SMILTimeContainer* root = GetTimedDocumentRoot(); + if (root) { + double fCurrentTimeMs = double(root->GetCurrentTimeAsSMILTime()); + return (float)(fCurrentTimeMs / PR_MSEC_PER_SEC); + } + return 0.f; +} + +void SVGSVGElement::SetCurrentTime(float seconds) { + if (mTimedDocumentRoot) { + // Make sure the timegraph is up-to-date + FlushAnimations(); + double fMilliseconds = double(seconds) * PR_MSEC_PER_SEC; + // Round to nearest whole number before converting, to avoid precision + // errors + SMILTime lMilliseconds = SVGUtils::ClampToInt64(NS_round(fMilliseconds)); + mTimedDocumentRoot->SetCurrentTime(lMilliseconds); + AnimationNeedsResample(); + // Trigger synchronous sample now, to: + // - Make sure we get an up-to-date paint after this method + // - re-enable event firing (it got disabled during seeking, and it + // doesn't get re-enabled until the first sample after the seek -- so + // let's make that happen now.) + FlushAnimations(); + } + // else we're not the outermost <svg> or not bound to a tree, so silently fail +} + +void SVGSVGElement::DeselectAll() { + nsIFrame* frame = GetPrimaryFrame(); + if (frame) { + RefPtr<nsFrameSelection> frameSelection = frame->GetFrameSelection(); + frameSelection->ClearNormalSelection(); + } +} + +already_AddRefed<DOMSVGNumber> SVGSVGElement::CreateSVGNumber() { + return do_AddRef(new DOMSVGNumber(this)); +} + +already_AddRefed<DOMSVGLength> SVGSVGElement::CreateSVGLength() { + return do_AddRef(new DOMSVGLength()); +} + +already_AddRefed<DOMSVGAngle> SVGSVGElement::CreateSVGAngle() { + return do_AddRef(new DOMSVGAngle(this)); +} + +already_AddRefed<DOMSVGPoint> SVGSVGElement::CreateSVGPoint() { + return do_AddRef(new DOMSVGPoint(Point(0, 0))); +} + +already_AddRefed<SVGMatrix> SVGSVGElement::CreateSVGMatrix() { + return do_AddRef(new SVGMatrix()); +} + +already_AddRefed<SVGRect> SVGSVGElement::CreateSVGRect() { + return do_AddRef(new SVGRect(this)); +} + +already_AddRefed<DOMSVGTransform> SVGSVGElement::CreateSVGTransform() { + return do_AddRef(new DOMSVGTransform()); +} + +already_AddRefed<DOMSVGTransform> SVGSVGElement::CreateSVGTransformFromMatrix( + const DOMMatrix2DInit& matrix, ErrorResult& rv) { + return do_AddRef(new DOMSVGTransform(matrix, rv)); +} + +void SVGSVGElement::DidChangeTranslate() { + if (Document* doc = GetUncomposedDoc()) { + RefPtr<PresShell> presShell = doc->GetPresShell(); + // now dispatch the appropriate event if we are the root element + if (presShell && IsRootSVGSVGElement()) { + nsEventStatus status = nsEventStatus_eIgnore; + WidgetEvent svgScrollEvent(true, eSVGScroll); + presShell->HandleDOMEventWithTarget(this, &svgScrollEvent, &status); + InvalidateTransformNotifyFrame(); + } + } +} + +//---------------------------------------------------------------------- +// SVGZoomAndPanValues +uint16_t SVGSVGElement::ZoomAndPan() const { + return mEnumAttributes[ZOOMANDPAN].GetAnimValue(); +} + +void SVGSVGElement::SetZoomAndPan(uint16_t aZoomAndPan, ErrorResult& rv) { + if (aZoomAndPan == SVG_ZOOMANDPAN_DISABLE || + aZoomAndPan == SVG_ZOOMANDPAN_MAGNIFY) { + ErrorResult nestedRv; + mEnumAttributes[ZOOMANDPAN].SetBaseValue(aZoomAndPan, this, nestedRv); + MOZ_ASSERT(!nestedRv.Failed(), + "We already validated our aZoomAndPan value!"); + return; + } + + rv.ThrowRangeError<MSG_INVALID_ZOOMANDPAN_VALUE_ERROR>(); +} + +//---------------------------------------------------------------------- +SMILTimeContainer* SVGSVGElement::GetTimedDocumentRoot() { + if (mTimedDocumentRoot) { + return mTimedDocumentRoot.get(); + } + + // We must not be the outermost <svg> element, try to find it + SVGSVGElement* outerSVGElement = SVGContentUtils::GetOuterSVGElement(this); + + if (outerSVGElement) { + return outerSVGElement->GetTimedDocumentRoot(); + } + // invalid structure + return nullptr; +} +//---------------------------------------------------------------------- +// SVGElement +nsresult SVGSVGElement::BindToTree(BindContext& aContext, nsINode& aParent) { + SMILAnimationController* smilController = nullptr; + + if (Document* doc = aContext.GetComposedDoc()) { + if ((smilController = doc->GetAnimationController())) { + // SMIL is enabled in this document + if (WillBeOutermostSVG(aParent)) { + // We'll be the outermost <svg> element. We'll need a time container. + if (!mTimedDocumentRoot) { + mTimedDocumentRoot = MakeUnique<SMILTimeContainer>(); + } + } else { + // We're a child of some other <svg> element, so we don't need our own + // time container. However, we need to make sure that we'll get a + // kick-start if we get promoted to be outermost later on. + mTimedDocumentRoot = nullptr; + mStartAnimationOnBindToTree = true; + } + } + } + + nsresult rv = SVGGraphicsElement::BindToTree(aContext, aParent); + NS_ENSURE_SUCCESS(rv, rv); + + if (mTimedDocumentRoot && smilController) { + rv = mTimedDocumentRoot->SetParent(smilController); + if (mStartAnimationOnBindToTree) { + mTimedDocumentRoot->Begin(); + mStartAnimationOnBindToTree = false; + } + } + + return rv; +} + +void SVGSVGElement::UnbindFromTree(bool aNullParent) { + if (mTimedDocumentRoot) { + mTimedDocumentRoot->SetParent(nullptr); + } + + SVGGraphicsElement::UnbindFromTree(aNullParent); +} + +SVGAnimatedTransformList* SVGSVGElement::GetAnimatedTransformList( + uint32_t aFlags) { + if (!(aFlags & DO_ALLOCATE) && mSVGView && mSVGView->mTransforms) { + return mSVGView->mTransforms.get(); + } + return SVGGraphicsElement::GetAnimatedTransformList(aFlags); +} + +void SVGSVGElement::GetEventTargetParent(EventChainPreVisitor& aVisitor) { + if (aVisitor.mEvent->mMessage == eSVGLoad) { + if (mTimedDocumentRoot) { + mTimedDocumentRoot->Begin(); + // Set 'resample needed' flag, so that if any script calls a DOM method + // that requires up-to-date animations before our first sample callback, + // we'll force a synchronous sample. + AnimationNeedsResample(); + } + } + SVGSVGElementBase::GetEventTargetParent(aVisitor); +} + +bool SVGSVGElement::IsEventAttributeNameInternal(nsAtom* aName) { + /* The events in EventNameType_SVGSVG are for events that are only + applicable to outermost 'svg' elements. We don't check if we're an outer + 'svg' element in case we're not inserted into the document yet, but since + the target of the events in question will always be the outermost 'svg' + element, this shouldn't cause any real problems. + */ + return nsContentUtils::IsEventAttributeName( + aName, (EventNameType_SVGGraphic | EventNameType_SVGSVG)); +} + +LengthPercentage SVGSVGElement::GetIntrinsicWidthOrHeight(int aAttr) { + MOZ_ASSERT(aAttr == ATTR_WIDTH || aAttr == ATTR_HEIGHT); + + if (mLengthAttributes[aAttr].IsPercentage()) { + float rawSize = mLengthAttributes[aAttr].GetAnimValInSpecifiedUnits(); + return LengthPercentage::FromPercentage(rawSize); + } + + // Passing |this| as a SVGViewportElement* invokes the variant of GetAnimValue + // that uses the passed argument as the context, but that's fine since we + // know the length isn't a percentage so the context won't be used (and we + // need to pass the element to be able to resolve em/ex units). + float rawSize = mLengthAttributes[aAttr].GetAnimValue(this); + return LengthPercentage::FromPixels(rawSize); +} + +//---------------------------------------------------------------------- +// public helpers: + +LengthPercentage SVGSVGElement::GetIntrinsicWidth() { + return GetIntrinsicWidthOrHeight(ATTR_WIDTH); +} + +LengthPercentage SVGSVGElement::GetIntrinsicHeight() { + return GetIntrinsicWidthOrHeight(ATTR_HEIGHT); +} + +void SVGSVGElement::FlushImageTransformInvalidation() { + MOZ_ASSERT(!GetParent(), "Should only be called on root node"); + MOZ_ASSERT(OwnerDoc()->IsBeingUsedAsImage(), + "Should only be called on image documents"); + + if (mImageNeedsTransformInvalidation) { + InvalidateTransformNotifyFrame(); + mImageNeedsTransformInvalidation = false; + } +} + +//---------------------------------------------------------------------- +// implementation helpers + +bool SVGSVGElement::WillBeOutermostSVG(nsINode& aParent) const { + nsINode* parent = &aParent; + while (parent && parent->IsSVGElement()) { + if (parent->IsSVGElement(nsGkAtoms::foreignObject)) { + // SVG in a foreignObject must have its own <svg> (SVGOuterSVGFrame). + return false; + } + if (parent->IsSVGElement(nsGkAtoms::svg)) { + return false; + } + parent = parent->GetParentOrShadowHostNode(); + } + + return true; +} + +void SVGSVGElement::InvalidateTransformNotifyFrame() { + ISVGSVGFrame* svgframe = do_QueryFrame(GetPrimaryFrame()); + // might fail this check if we've failed conditional processing + if (svgframe) { + svgframe->NotifyViewportOrTransformChanged( + ISVGDisplayableFrame::TRANSFORM_CHANGED); + } +} + +SVGElement::EnumAttributesInfo SVGSVGElement::GetEnumInfo() { + return EnumAttributesInfo(mEnumAttributes, sEnumInfo, ArrayLength(sEnumInfo)); +} + +void SVGSVGElement::SetImageOverridePreserveAspectRatio( + const SVGPreserveAspectRatio& aPAR) { + MOZ_ASSERT(OwnerDoc()->IsBeingUsedAsImage(), + "should only override preserveAspectRatio in images"); + + bool hasViewBox = HasViewBox(); + if (!hasViewBox && ShouldSynthesizeViewBox()) { + // My non-<svg:image> clients will have been painting me with a synthesized + // viewBox, but my <svg:image> client that's about to paint me now does NOT + // want that. Need to tell ourselves to flush our transform. + mImageNeedsTransformInvalidation = true; + } + + if (!hasViewBox) { + return; // preserveAspectRatio irrelevant (only matters if we have viewBox) + } + + if (SetPreserveAspectRatioProperty(aPAR)) { + mImageNeedsTransformInvalidation = true; + } +} + +void SVGSVGElement::ClearImageOverridePreserveAspectRatio() { + MOZ_ASSERT(OwnerDoc()->IsBeingUsedAsImage(), + "should only override image preserveAspectRatio in images"); + + if (!HasViewBox() && ShouldSynthesizeViewBox()) { + // My non-<svg:image> clients will want to paint me with a synthesized + // viewBox, but my <svg:image> client that just painted me did NOT + // use that. Need to tell ourselves to flush our transform. + mImageNeedsTransformInvalidation = true; + } + + if (ClearPreserveAspectRatioProperty()) { + mImageNeedsTransformInvalidation = true; + } +} + +bool SVGSVGElement::SetPreserveAspectRatioProperty( + const SVGPreserveAspectRatio& aPAR) { + SVGPreserveAspectRatio* pAROverridePtr = new SVGPreserveAspectRatio(aPAR); + nsresult rv = + SetProperty(nsGkAtoms::overridePreserveAspectRatio, pAROverridePtr, + nsINode::DeleteProperty<SVGPreserveAspectRatio>, true); + MOZ_ASSERT(rv != NS_PROPTABLE_PROP_OVERWRITTEN, + "Setting override value when it's already set...?"); + + if (MOZ_UNLIKELY(NS_FAILED(rv))) { + // property-insertion failed (e.g. OOM in property-table code) + delete pAROverridePtr; + return false; + } + return true; +} + +const SVGPreserveAspectRatio* SVGSVGElement::GetPreserveAspectRatioProperty() + const { + void* valPtr = GetProperty(nsGkAtoms::overridePreserveAspectRatio); + if (valPtr) { + return static_cast<SVGPreserveAspectRatio*>(valPtr); + } + return nullptr; +} + +bool SVGSVGElement::ClearPreserveAspectRatioProperty() { + void* valPtr = TakeProperty(nsGkAtoms::overridePreserveAspectRatio); + bool didHaveProperty = !!valPtr; + delete static_cast<SVGPreserveAspectRatio*>(valPtr); + return didHaveProperty; +} + +SVGPreserveAspectRatio SVGSVGElement::GetPreserveAspectRatioWithOverride() + const { + Document* doc = GetUncomposedDoc(); + if (doc && doc->IsBeingUsedAsImage()) { + const SVGPreserveAspectRatio* pAROverridePtr = + GetPreserveAspectRatioProperty(); + if (pAROverridePtr) { + return *pAROverridePtr; + } + } + + SVGViewElement* viewElement = GetCurrentViewElement(); + + // This check is equivalent to "!HasViewBox() && + // ShouldSynthesizeViewBox()". We're just holding onto the viewElement that + // HasViewBox() would look up, so that we don't have to look it up again + // later. + if (!((viewElement && viewElement->mViewBox.HasRect()) || + (mSVGView && mSVGView->mViewBox.HasRect()) || mViewBox.HasRect()) && + ShouldSynthesizeViewBox()) { + // If we're synthesizing a viewBox, use preserveAspectRatio="none"; + return SVGPreserveAspectRatio(SVG_PRESERVEASPECTRATIO_NONE, + SVG_MEETORSLICE_SLICE); + } + + if (viewElement && viewElement->mPreserveAspectRatio.IsExplicitlySet()) { + return viewElement->mPreserveAspectRatio.GetAnimValue(); + } + if (mSVGView && mSVGView->mPreserveAspectRatio.IsExplicitlySet()) { + return mSVGView->mPreserveAspectRatio.GetAnimValue(); + } + return mPreserveAspectRatio.GetAnimValue(); +} + +SVGViewElement* SVGSVGElement::GetCurrentViewElement() const { + if (mCurrentViewID) { + // XXXsmaug It is unclear how this should work in case we're in Shadow DOM. + Document* doc = GetUncomposedDoc(); + if (doc) { + Element* element = doc->GetElementById(*mCurrentViewID); + return SVGViewElement::FromNodeOrNull(element); + } + } + return nullptr; +} + +const SVGAnimatedViewBox& SVGSVGElement::GetViewBoxInternal() const { + SVGViewElement* viewElement = GetCurrentViewElement(); + + if (viewElement && viewElement->mViewBox.HasRect()) { + return viewElement->mViewBox; + } + if (mSVGView && mSVGView->mViewBox.HasRect()) { + return mSVGView->mViewBox; + } + + return mViewBox; +} + +SVGAnimatedTransformList* SVGSVGElement::GetTransformInternal() const { + return (mSVGView && mSVGView->mTransforms) ? mSVGView->mTransforms.get() + : mTransforms.get(); +} + +} // namespace mozilla::dom |