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412f98cac5
We need to call it on some hot paths in stylo, and this allows us to do quick inline check before delegating to the slow path.
474 lines
16 KiB
C++
474 lines
16 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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#ifndef mozilla_dom_SVGSVGElement_h
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#define mozilla_dom_SVGSVGElement_h
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#include "mozilla/dom/FromParser.h"
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#include "nsAutoPtr.h"
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#include "nsIContentInlines.h"
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#include "nsISVGPoint.h"
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#include "nsSVGEnum.h"
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#include "nsSVGLength2.h"
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#include "SVGGraphicsElement.h"
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#include "SVGImageContext.h"
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#include "nsSVGViewBox.h"
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#include "SVGPreserveAspectRatio.h"
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#include "SVGAnimatedPreserveAspectRatio.h"
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#include "mozilla/Attributes.h"
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nsresult NS_NewSVGSVGElement(nsIContent **aResult,
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
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mozilla::dom::FromParser aFromParser);
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class nsSMILTimeContainer;
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class nsSVGOuterSVGFrame;
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class nsSVGInnerSVGFrame;
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namespace mozilla {
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class AutoSVGRenderingState;
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class DOMSVGAnimatedPreserveAspectRatio;
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class DOMSVGLength;
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class DOMSVGNumber;
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class EventChainPreVisitor;
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class SVGFragmentIdentifier;
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class AutoSVGViewHandler;
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namespace dom {
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class SVGAngle;
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class SVGAnimatedRect;
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class SVGMatrix;
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class SVGTransform;
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class SVGViewElement;
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class SVGIRect;
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class SVGSVGElement;
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class DOMSVGTranslatePoint final : public nsISVGPoint {
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public:
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DOMSVGTranslatePoint(SVGPoint* aPt, SVGSVGElement *aElement)
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: nsISVGPoint(aPt, true), mElement(aElement) {}
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explicit DOMSVGTranslatePoint(DOMSVGTranslatePoint* aPt)
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: nsISVGPoint(&aPt->mPt, true), mElement(aPt->mElement) {}
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(DOMSVGTranslatePoint, nsISVGPoint)
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virtual DOMSVGPoint* Copy() override;
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// WebIDL
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virtual float X() override { return mPt.GetX(); }
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virtual float Y() override { return mPt.GetY(); }
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virtual void SetX(float aValue, ErrorResult& rv) override;
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virtual void SetY(float aValue, ErrorResult& rv) override;
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virtual already_AddRefed<nsISVGPoint> MatrixTransform(SVGMatrix& matrix) override;
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virtual nsISupports* GetParentObject() override;
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RefPtr<SVGSVGElement> mElement;
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private:
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~DOMSVGTranslatePoint() {}
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};
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class svgFloatSize {
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public:
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svgFloatSize(float aWidth, float aHeight)
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: width(aWidth)
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, height(aHeight)
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{}
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bool operator!=(const svgFloatSize& rhs) {
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return width != rhs.width || height != rhs.height;
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}
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float width;
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float height;
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};
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// Stores svgView arguments of SVG fragment identifiers.
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class SVGView {
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friend class mozilla::AutoSVGViewHandler;
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friend class mozilla::dom::SVGSVGElement;
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public:
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SVGView();
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private:
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nsSVGEnum mZoomAndPan;
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nsSVGViewBox mViewBox;
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SVGAnimatedPreserveAspectRatio mPreserveAspectRatio;
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nsAutoPtr<nsSVGAnimatedTransformList> mTransforms;
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};
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typedef SVGGraphicsElement SVGSVGElementBase;
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class SVGSVGElement final : public SVGSVGElementBase
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{
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friend class ::nsSVGOuterSVGFrame;
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friend class ::nsSVGInnerSVGFrame;
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friend class mozilla::dom::SVGView;
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friend class mozilla::SVGFragmentIdentifier;
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friend class mozilla::AutoSVGViewHandler;
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friend class mozilla::AutoSVGRenderingState;
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SVGSVGElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo,
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FromParser aFromParser);
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virtual JSObject* WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto) override;
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friend nsresult (::NS_NewSVGSVGElement(nsIContent **aResult,
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
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mozilla::dom::FromParser aFromParser));
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~SVGSVGElement();
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public:
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// interfaces:
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SVGSVGElement, SVGSVGElementBase)
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/**
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* For use by zoom controls to allow currentScale, currentTranslate.x and
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* currentTranslate.y to be set by a single operation that dispatches a
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* single SVGZoom event (instead of one SVGZoom and two SVGScroll events).
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*/
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void SetCurrentScaleTranslate(float s, float x, float y);
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/**
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* Retrieve the value of currentScale and currentTranslate.
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*/
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const SVGPoint& GetCurrentTranslate() { return mCurrentTranslate; }
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float GetCurrentScale() { return mCurrentScale; }
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/**
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* Retrieve the value of currentScale, currentTranslate.x or
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* currentTranslate.y prior to the last change made to any one of them.
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*/
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const SVGPoint& GetPreviousTranslate() { return mPreviousTranslate; }
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float GetPreviousScale() { return mPreviousScale; }
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nsSMILTimeContainer* GetTimedDocumentRoot();
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// nsIContent interface
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NS_IMETHOD_(bool) IsAttributeMapped(const nsIAtom* aAttribute) const override;
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virtual nsresult PreHandleEvent(EventChainPreVisitor& aVisitor) override;
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virtual bool IsEventAttributeName(nsIAtom* aName) override;
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// nsSVGElement specializations:
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virtual gfxMatrix PrependLocalTransformsTo(
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const gfxMatrix &aMatrix,
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SVGTransformTypes aWhich = eAllTransforms) const override;
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virtual nsSVGAnimatedTransformList*
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GetAnimatedTransformList(uint32_t aFlags = 0) override;
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virtual bool HasValidDimensions() const override;
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// SVGSVGElement methods:
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float GetLength(uint8_t mCtxType);
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// public helpers:
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/**
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* Returns -1 if the width/height is a percentage, else returns the user unit
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* length clamped to fit in a int32_t.
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* XXX see bug 1112533 comment 3 - we should fix drawImage so that we can
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* change these methods to make zero the error flag for percentages.
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*/
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int32_t GetIntrinsicWidth();
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int32_t GetIntrinsicHeight();
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/**
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* Returns true if this element has a base/anim value for its "viewBox"
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* attribute that defines a viewBox rectangle with finite values, or
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* if there is a view element overriding this element's viewBox and it
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* has a valid viewBox.
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*
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* Note that this does not check whether we need to synthesize a viewBox,
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* so you must call ShouldSynthesizeViewBox() if you need to check that too.
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*
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* Note also that this method does not pay attention to whether the width or
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* height values of the viewBox rect are positive!
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*/
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bool HasViewBoxRect() const;
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/**
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* Returns true if we should synthesize a viewBox for ourselves (that is, if
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* we're the root element in an image document, and we're not currently being
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* painted for an <svg:image> element).
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*
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* Only call this method if HasViewBoxRect() returns false.
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*/
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bool ShouldSynthesizeViewBox() const;
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bool HasViewBoxOrSyntheticViewBox() const {
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return HasViewBoxRect() || ShouldSynthesizeViewBox();
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}
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gfx::Matrix GetViewBoxTransform() const;
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bool HasChildrenOnlyTransform() const {
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return mHasChildrenOnlyTransform;
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}
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void UpdateHasChildrenOnlyTransform();
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enum ChildrenOnlyTransformChangedFlags {
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eDuringReflow = 1
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};
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/**
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* This method notifies the style system that the overflow rects of our
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* immediate childrens' frames need to be updated. It is called by our own
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* frame when changes (e.g. to currentScale) cause our children-only
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* transform to change.
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*
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* The reason we have this method instead of overriding
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* GetAttributeChangeHint is because we need to act on non-attribute (e.g.
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* currentScale) changes in addition to attribute (e.g. viewBox) changes.
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*/
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void ChildrenOnlyTransformChanged(uint32_t aFlags = 0);
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// This services any pending notifications for the transform on on this root
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// <svg> node needing to be recalculated. (Only applicable in
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// SVG-as-an-image documents.)
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virtual void FlushImageTransformInvalidation();
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virtual nsresult Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult) const override;
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// Returns true IFF our attributes are currently overridden by a <view>
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// element and that element's ID matches the passed-in string.
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bool IsOverriddenBy(const nsAString &aViewID) const {
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return mCurrentViewID && mCurrentViewID->Equals(aViewID);
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}
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svgFloatSize GetViewportSize() const {
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return svgFloatSize(mViewportWidth, mViewportHeight);
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}
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void SetViewportSize(const svgFloatSize& aSize) {
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mViewportWidth = aSize.width;
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mViewportHeight = aSize.height;
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}
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// WebIDL
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already_AddRefed<SVGAnimatedLength> X();
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already_AddRefed<SVGAnimatedLength> Y();
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already_AddRefed<SVGAnimatedLength> Width();
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already_AddRefed<SVGAnimatedLength> Height();
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float PixelUnitToMillimeterX();
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float PixelUnitToMillimeterY();
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float ScreenPixelToMillimeterX();
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float ScreenPixelToMillimeterY();
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bool UseCurrentView();
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float CurrentScale();
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void SetCurrentScale(float aCurrentScale);
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already_AddRefed<nsISVGPoint> CurrentTranslate();
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void SetCurrentTranslate(float x, float y);
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uint32_t SuspendRedraw(uint32_t max_wait_milliseconds);
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void UnsuspendRedraw(uint32_t suspend_handle_id);
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void UnsuspendRedrawAll();
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void ForceRedraw();
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void PauseAnimations();
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void UnpauseAnimations();
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bool AnimationsPaused();
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float GetCurrentTime();
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void SetCurrentTime(float seconds);
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void DeselectAll();
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already_AddRefed<DOMSVGNumber> CreateSVGNumber();
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already_AddRefed<DOMSVGLength> CreateSVGLength();
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already_AddRefed<SVGAngle> CreateSVGAngle();
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already_AddRefed<nsISVGPoint> CreateSVGPoint();
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already_AddRefed<SVGMatrix> CreateSVGMatrix();
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already_AddRefed<SVGIRect> CreateSVGRect();
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already_AddRefed<SVGTransform> CreateSVGTransform();
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already_AddRefed<SVGTransform> CreateSVGTransformFromMatrix(SVGMatrix& matrix);
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using nsINode::GetElementById; // This does what we want
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already_AddRefed<SVGAnimatedRect> ViewBox();
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already_AddRefed<DOMSVGAnimatedPreserveAspectRatio> PreserveAspectRatio();
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uint16_t ZoomAndPan();
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void SetZoomAndPan(uint16_t aZoomAndPan, ErrorResult& rv);
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private:
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// nsSVGElement overrides
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virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
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nsIContent* aBindingParent,
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bool aCompileEventHandlers) override;
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virtual void UnbindFromTree(bool aDeep, bool aNullParent) override;
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// implementation helpers:
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SVGViewElement* GetCurrentViewElement() const;
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// Methods for <image> elements to override my "PreserveAspectRatio" value.
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// These are private so that only our friends (AutoSVGRenderingState in
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// particular) have access.
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void SetImageOverridePreserveAspectRatio(const SVGPreserveAspectRatio& aPAR);
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void ClearImageOverridePreserveAspectRatio();
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// Set/Clear properties to hold old version of preserveAspectRatio
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// when it's being overridden by an <image> element that we are inside of.
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bool SetPreserveAspectRatioProperty(const SVGPreserveAspectRatio& aPAR);
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const SVGPreserveAspectRatio* GetPreserveAspectRatioProperty() const;
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bool ClearPreserveAspectRatioProperty();
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void SetIsPaintingForSVGImageElement(bool aIsPaintingSVGImageElement);
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bool IsRoot() const {
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NS_ASSERTION((IsInUncomposedDoc() && !GetParent()) ==
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(OwnerDoc() && (OwnerDoc()->GetRootElement() == this)),
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"Can't determine if we're root");
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return IsInUncomposedDoc() && !GetParent();
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}
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/**
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* Returns true if this is an SVG <svg> element that is the child of
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* another non-foreignObject SVG element.
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*/
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bool IsInner() const {
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const nsIContent *parent = GetFlattenedTreeParent();
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return parent && parent->IsSVGElement() &&
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!parent->IsSVGElement(nsGkAtoms::foreignObject);
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}
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/*
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* While binding to the tree we need to determine if we will be the outermost
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* <svg> element _before_ the children are bound (as they want to know what
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* timed document root to register with) and therefore _before_ our parent is
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* set (both actions are performed by Element::BindToTree) so we
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* can't use GetOwnerSVGElement() as it relies on GetParent(). This code is
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* basically a simplified version of GetOwnerSVGElement that uses the parent
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* parameters passed in instead.
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*/
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bool WillBeOutermostSVG(nsIContent* aParent,
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nsIContent* aBindingParent) const;
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// invalidate viewbox -> viewport xform & inform frames
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void InvalidateTransformNotifyFrame();
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// Returns true if we have at least one of the following:
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// - a (valid or invalid) value for the preserveAspectRatio attribute
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// - a SMIL-animated value for the preserveAspectRatio attribute
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bool HasPreserveAspectRatio();
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/**
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* Returns the explicit viewBox rect, if specified, or else a synthesized
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* viewBox, if appropriate, or else a viewBox matching the dimensions of the
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* SVG viewport.
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*/
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nsSVGViewBoxRect GetViewBoxWithSynthesis(
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float aViewportWidth, float aViewportHeight) const;
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/**
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* Returns the explicit or default preserveAspectRatio, unless we're
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* synthesizing a viewBox, in which case it returns the "none" value.
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*/
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SVGPreserveAspectRatio GetPreserveAspectRatioWithOverride() const;
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virtual LengthAttributesInfo GetLengthInfo() override;
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enum { ATTR_X, ATTR_Y, ATTR_WIDTH, ATTR_HEIGHT };
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nsSVGLength2 mLengthAttributes[4];
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static LengthInfo sLengthInfo[4];
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virtual EnumAttributesInfo GetEnumInfo() override;
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enum { ZOOMANDPAN };
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nsSVGEnum mEnumAttributes[1];
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static nsSVGEnumMapping sZoomAndPanMap[];
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static EnumInfo sEnumInfo[1];
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virtual nsSVGViewBox *GetViewBox() override;
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virtual SVGAnimatedPreserveAspectRatio *GetPreserveAspectRatio() override;
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nsSVGViewBox mViewBox;
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SVGAnimatedPreserveAspectRatio mPreserveAspectRatio;
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// mCurrentViewID and mSVGView are mutually exclusive; we can have
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// at most one non-null.
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nsAutoPtr<nsString> mCurrentViewID;
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nsAutoPtr<SVGView> mSVGView;
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// The size of the rectangular SVG viewport into which we render. This is
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// not (necessarily) the same as the content area. See:
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//
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// http://www.w3.org/TR/SVG11/coords.html#ViewportSpace
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//
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// XXXjwatt Currently only used for outer <svg>, but maybe we could use -1 to
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// flag this as an inner <svg> to save the overhead of GetCtx calls?
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// XXXjwatt our frame should probably reset these when it's destroyed.
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float mViewportWidth, mViewportHeight;
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// The time container for animations within this SVG document fragment. Set
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// for all outermost <svg> elements (not nested <svg> elements).
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nsAutoPtr<nsSMILTimeContainer> mTimedDocumentRoot;
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// zoom and pan
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// IMPORTANT: see the comment in RecordCurrentScaleTranslate before writing
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// code to change any of these!
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SVGPoint mCurrentTranslate;
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float mCurrentScale;
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SVGPoint mPreviousTranslate;
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float mPreviousScale;
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// For outermost <svg> elements created from parsing, animation is started by
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// the onload event in accordance with the SVG spec, but for <svg> elements
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// created by script or promoted from inner <svg> to outermost <svg> we need
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// to manually kick off animation when they are bound to the tree.
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bool mStartAnimationOnBindToTree;
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bool mImageNeedsTransformInvalidation;
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bool mIsPaintingSVGImageElement;
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bool mHasChildrenOnlyTransform;
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};
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} // namespace dom
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// Helper class to automatically manage temporary changes to an SVG document's
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// state for rendering purposes.
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class MOZ_RAII AutoSVGRenderingState
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{
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public:
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AutoSVGRenderingState(const Maybe<SVGImageContext>& aSVGContext,
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float aFrameTime,
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dom::SVGSVGElement* aRootElem
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MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
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: mHaveOverrides(aSVGContext.isSome() &&
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aSVGContext->GetPreserveAspectRatio().isSome())
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, mRootElem(aRootElem)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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MOZ_ASSERT(mRootElem, "No SVG node to manage?");
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if (mHaveOverrides) {
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// Override preserveAspectRatio in our helper document.
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// XXXdholbert We should technically be overriding the helper doc's clip
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// and overflow properties here, too. See bug 272288 comment 36.
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mRootElem->SetImageOverridePreserveAspectRatio(
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*aSVGContext->GetPreserveAspectRatio());
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mRootElem->SetIsPaintingForSVGImageElement(
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aSVGContext->IsPaintingForSVGImageElement());
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}
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mOriginalTime = mRootElem->GetCurrentTime();
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mRootElem->SetCurrentTime(aFrameTime); // Does nothing if there's no change.
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}
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~AutoSVGRenderingState()
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{
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mRootElem->SetCurrentTime(mOriginalTime);
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if (mHaveOverrides) {
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mRootElem->ClearImageOverridePreserveAspectRatio();
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mRootElem->SetIsPaintingForSVGImageElement(false);
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}
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}
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private:
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const bool mHaveOverrides;
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float mOriginalTime;
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const RefPtr<dom::SVGSVGElement> mRootElem;
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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};
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} // namespace mozilla
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#endif // SVGSVGElement_h
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