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/* -*- Mode: C++; tab-width: 8; 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/. */
#ifndef MOZILLA_SVGANIMATEDNUMBERLIST_H__
#define MOZILLA_SVGANIMATEDNUMBERLIST_H__
#include "mozilla/Attributes.h"
#include "nsAutoPtr.h"
#include "nsISMILAttr.h"
#include "SVGNumberList.h"
class nsSMILValue;
class nsSVGElement;
namespace mozilla {
namespace dom {
class SVGAnimationElement;
} // namespace dom
/**
* Class SVGAnimatedNumberList
*
* This class is very different to the SVG DOM interface of the same name found
* in the SVG specification. This is a lightweight internal class - see
* DOMSVGAnimatedNumberList for the heavier DOM class that wraps instances of
* this class and implements the SVG specification's SVGAnimatedNumberList DOM
* interface.
*
* Except where noted otherwise, this class' methods take care of keeping the
* appropriate DOM wrappers in sync (see the comment in
* DOMSVGAnimatedNumberList::InternalBaseValListWillChangeTo) so that their
* consumers don't need to concern themselves with that.
*/
class SVGAnimatedNumberList
{
// friends so that they can get write access to mBaseVal
friend class DOMSVGNumber;
friend class DOMSVGNumberList;
public:
SVGAnimatedNumberList() {}
/**
* Because it's so important that mBaseVal and its DOMSVGNumberList wrapper
* (if any) be kept in sync (see the comment in
* DOMSVGAnimatedNumberList::InternalBaseValListWillChangeTo), this method
* returns a const reference. Only our friend classes may get mutable
* references to mBaseVal.
*/
const SVGNumberList& GetBaseValue() const {
return mBaseVal;
}
nsresult SetBaseValueString(const nsAString& aValue);
void ClearBaseValue(uint32_t aAttrEnum);
const SVGNumberList& GetAnimValue() const {
return mAnimVal ? *mAnimVal : mBaseVal;
}
nsresult SetAnimValue(const SVGNumberList& aValue,
nsSVGElement *aElement,
uint32_t aAttrEnum);
void ClearAnimValue(nsSVGElement *aElement,
uint32_t aAttrEnum);
// Returns true if the animated value of this list has been explicitly
// set (either by animation, or by taking on the base value which has been
// explicitly set by markup or a DOM call), false otherwise.
// If this returns false, the animated value is still valid, that is,
// useable, and represents the default base value of the attribute.
bool IsExplicitlySet() const
{ return !!mAnimVal || mIsBaseSet; }
bool IsAnimating() const {
return !!mAnimVal;
}
/// Callers own the returned nsISMILAttr
nsISMILAttr* ToSMILAttr(nsSVGElement* aSVGElement, uint8_t aAttrEnum);
private:
// mAnimVal is a pointer to allow us to determine if we're being animated or
// not. Making it a non-pointer member and using mAnimVal.IsEmpty() to check
// if we're animating is not an option, since that would break animation *to*
// the empty string (<set to="">).
SVGNumberList mBaseVal;
nsAutoPtr<SVGNumberList> mAnimVal;
bool mIsBaseSet;
struct SMILAnimatedNumberList : public nsISMILAttr
{
public:
SMILAnimatedNumberList(SVGAnimatedNumberList* aVal,
nsSVGElement* aSVGElement,
uint8_t aAttrEnum)
: mVal(aVal)
, mElement(aSVGElement)
, mAttrEnum(aAttrEnum)
{}
// These will stay alive because a nsISMILAttr only lives as long
// as the Compositing step, and DOM elements don't get a chance to
// die during that.
SVGAnimatedNumberList* mVal;
nsSVGElement* mElement;
uint8_t mAttrEnum;
// nsISMILAttr methods
virtual nsresult ValueFromString(const nsAString& aStr,
const dom::SVGAnimationElement* aSrcElement,
nsSMILValue& aValue,
bool& aPreventCachingOfSandwich) const override;
virtual nsSMILValue GetBaseValue() const override;
virtual void ClearAnimValue() override;
virtual nsresult SetAnimValue(const nsSMILValue& aValue) override;
};
};
} // namespace mozilla
#endif // MOZILLA_SVGANIMATEDNUMBERLIST_H__
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