зеркало из https://github.com/mozilla/gecko-dev.git
115 строки
3.9 KiB
C++
115 строки
3.9 KiB
C++
/* -*- 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/. */
|
|
|
|
#ifndef MOZILLA_SVGANIMATEDPOINTLIST_H__
|
|
#define MOZILLA_SVGANIMATEDPOINTLIST_H__
|
|
|
|
#include "mozilla/Attributes.h"
|
|
#include "mozilla/SMILAttr.h"
|
|
#include "mozilla/UniquePtr.h"
|
|
#include "nsAutoPtr.h"
|
|
#include "SVGPointList.h"
|
|
|
|
namespace mozilla {
|
|
|
|
class SMILValue;
|
|
|
|
namespace dom {
|
|
class SVGAnimationElement;
|
|
class SVGElement;
|
|
} // namespace dom
|
|
|
|
/**
|
|
* Class SVGAnimatedPointList
|
|
*
|
|
* Despite the fact that no SVGAnimatedPointList interface or objects exist
|
|
* in the SVG specification (unlike e.g. SVGAnimated*Length*List), we
|
|
* nevertheless have this internal class. (Note that there is an
|
|
* SVGAnimatedPoints interface, but that's quite different to
|
|
* SVGAnimatedLengthList since it is inherited by elements, as opposed to
|
|
* elements having members of that type.) The reason that we have this class is
|
|
* to provide a single locked down point of entry to the SVGPointList objects,
|
|
* which helps ensure that the DOM wrappers for SVGPointList objects' are
|
|
* always kept in sync. This is vitally important (see the comment in
|
|
* DOMSVGPointList::InternalListWillChangeTo) and frees consumers from having
|
|
* to know or worry about wrappers (or forget about them!) for the most part.
|
|
*/
|
|
class SVGAnimatedPointList {
|
|
// friends so that they can get write access to mBaseVal and mAnimVal
|
|
friend class DOMSVGPoint;
|
|
friend class DOMSVGPointList;
|
|
|
|
public:
|
|
SVGAnimatedPointList() {}
|
|
|
|
/**
|
|
* Because it's so important that mBaseVal and its DOMSVGPointList wrapper
|
|
* (if any) be kept in sync (see the comment in
|
|
* DOMSVGPointList::InternalListWillChangeTo), this method returns a const
|
|
* reference. Only our friend classes may get mutable references to mBaseVal.
|
|
*/
|
|
const SVGPointList& GetBaseValue() const { return mBaseVal; }
|
|
|
|
nsresult SetBaseValueString(const nsAString& aValue);
|
|
|
|
void ClearBaseValue();
|
|
|
|
/**
|
|
* const! See comment for GetBaseValue!
|
|
*/
|
|
const SVGPointList& GetAnimValue() const {
|
|
return mAnimVal ? *mAnimVal : mBaseVal;
|
|
}
|
|
|
|
nsresult SetAnimValue(const SVGPointList& aValue, dom::SVGElement* aElement);
|
|
|
|
void ClearAnimValue(dom::SVGElement* aElement);
|
|
|
|
/**
|
|
* Needed for correct DOM wrapper construction since GetAnimValue may
|
|
* actually return the baseVal!
|
|
*/
|
|
void* GetBaseValKey() const { return (void*)&mBaseVal; }
|
|
void* GetAnimValKey() const { return (void*)&mAnimVal; }
|
|
|
|
bool IsAnimating() const { return !!mAnimVal; }
|
|
|
|
UniquePtr<SMILAttr> ToSMILAttr(dom::SVGElement* aElement);
|
|
|
|
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="">).
|
|
|
|
SVGPointList mBaseVal;
|
|
nsAutoPtr<SVGPointList> mAnimVal;
|
|
|
|
struct SMILAnimatedPointList : public SMILAttr {
|
|
public:
|
|
SMILAnimatedPointList(SVGAnimatedPointList* aVal, dom::SVGElement* aElement)
|
|
: mVal(aVal), mElement(aElement) {}
|
|
|
|
// These will stay alive because a SMILAttr only lives as long
|
|
// as the Compositing step, and DOM elements don't get a chance to
|
|
// die during that.
|
|
SVGAnimatedPointList* mVal;
|
|
dom::SVGElement* mElement;
|
|
|
|
// SMILAttr methods
|
|
virtual nsresult ValueFromString(
|
|
const nsAString& aStr, const dom::SVGAnimationElement* aSrcElement,
|
|
SMILValue& aValue, bool& aPreventCachingOfSandwich) const override;
|
|
virtual SMILValue GetBaseValue() const override;
|
|
virtual void ClearAnimValue() override;
|
|
virtual nsresult SetAnimValue(const SMILValue& aValue) override;
|
|
};
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // MOZILLA_SVGANIMATEDPOINTLIST_H__
|