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convert MOZ_OVERRIDE override
convert MOZ_FINAL final
130 lines
4.0 KiB
C++
130 lines
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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_SVGANIMATEDPOINTLIST_H__
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#define MOZILLA_SVGANIMATEDPOINTLIST_H__
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#include "mozilla/Attributes.h"
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#include "nsAutoPtr.h"
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#include "nsISMILAttr.h"
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#include "SVGPointList.h"
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class nsSMILValue;
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class nsSVGElement;
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namespace mozilla {
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namespace dom {
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class SVGAnimationElement;
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}
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/**
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* Class SVGAnimatedPointList
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*
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* Despite the fact that no SVGAnimatedPointList interface or objects exist
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* in the SVG specification (unlike e.g. SVGAnimated*Length*List), we
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* nevertheless have this internal class. (Note that there is an
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* SVGAnimatedPoints interface, but that's quite different to
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* SVGAnimatedLengthList since it is inherited by elements, as opposed to
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* elements having members of that type.) The reason that we have this class is
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* to provide a single locked down point of entry to the SVGPointList objects,
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* which helps ensure that the DOM wrappers for SVGPointList objects' are
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* always kept in sync. This is vitally important (see the comment in
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* DOMSVGPointList::InternalListWillChangeTo) and frees consumers from having
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* to know or worry about wrappers (or forget about them!) for the most part.
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*/
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class SVGAnimatedPointList
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{
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// friends so that they can get write access to mBaseVal and mAnimVal
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friend class DOMSVGPoint;
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friend class DOMSVGPointList;
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public:
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SVGAnimatedPointList() {}
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/**
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* Because it's so important that mBaseVal and its DOMSVGPointList wrapper
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* (if any) be kept in sync (see the comment in
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* DOMSVGPointList::InternalListWillChangeTo), this method returns a const
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* reference. Only our friend classes may get mutable references to mBaseVal.
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*/
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const SVGPointList& GetBaseValue() const {
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return mBaseVal;
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}
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nsresult SetBaseValueString(const nsAString& aValue);
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void ClearBaseValue();
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/**
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* const! See comment for GetBaseValue!
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*/
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const SVGPointList& GetAnimValue() const {
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return mAnimVal ? *mAnimVal : mBaseVal;
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}
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nsresult SetAnimValue(const SVGPointList& aValue,
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nsSVGElement *aElement);
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void ClearAnimValue(nsSVGElement *aElement);
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/**
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* Needed for correct DOM wrapper construction since GetAnimValue may
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* actually return the baseVal!
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*/
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void *GetBaseValKey() const {
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return (void*)&mBaseVal;
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}
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void *GetAnimValKey() const {
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return (void*)&mAnimVal;
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}
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bool IsAnimating() const {
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return !!mAnimVal;
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}
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/// Callers own the returned nsISMILAttr
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nsISMILAttr* ToSMILAttr(nsSVGElement* aElement);
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private:
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// mAnimVal is a pointer to allow us to determine if we're being animated or
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// not. Making it a non-pointer member and using mAnimVal.IsEmpty() to check
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// if we're animating is not an option, since that would break animation *to*
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// the empty string (<set to="">).
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SVGPointList mBaseVal;
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nsAutoPtr<SVGPointList> mAnimVal;
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struct SMILAnimatedPointList : public nsISMILAttr
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{
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public:
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SMILAnimatedPointList(SVGAnimatedPointList* aVal,
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nsSVGElement* aElement)
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: mVal(aVal)
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, mElement(aElement)
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{}
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// These will stay alive because a nsISMILAttr only lives as long
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// as the Compositing step, and DOM elements don't get a chance to
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// die during that.
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SVGAnimatedPointList *mVal;
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nsSVGElement *mElement;
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// nsISMILAttr methods
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virtual nsresult ValueFromString(const nsAString& aStr,
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const dom::SVGAnimationElement* aSrcElement,
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nsSMILValue& aValue,
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bool& aPreventCachingOfSandwich) const override;
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virtual nsSMILValue GetBaseValue() const override;
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virtual void ClearAnimValue() override;
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virtual nsresult SetAnimValue(const nsSMILValue& aValue) override;
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};
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};
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} // namespace mozilla
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#endif // MOZILLA_SVGANIMATEDPOINTLIST_H__
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