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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_CONTENT_SVGPRESERVEASPECTRATIO_H_
#define MOZILLA_CONTENT_SVGPRESERVEASPECTRATIO_H_
#include "mozilla/HashFunctions.h" // for HashGeneric
#include "nsWrapperCache.h"
#include "nsCycleCollectionParticipant.h"
#include "mozilla/ErrorResult.h"
#include "nsSVGElement.h"
namespace mozilla {
// Alignment Types
enum SVGAlign : uint8_t {
SVG_PRESERVEASPECTRATIO_UNKNOWN = 0,
SVG_PRESERVEASPECTRATIO_NONE = 1,
SVG_PRESERVEASPECTRATIO_XMINYMIN = 2,
SVG_PRESERVEASPECTRATIO_XMIDYMIN = 3,
SVG_PRESERVEASPECTRATIO_XMAXYMIN = 4,
SVG_PRESERVEASPECTRATIO_XMINYMID = 5,
SVG_PRESERVEASPECTRATIO_XMIDYMID = 6,
SVG_PRESERVEASPECTRATIO_XMAXYMID = 7,
SVG_PRESERVEASPECTRATIO_XMINYMAX = 8,
SVG_PRESERVEASPECTRATIO_XMIDYMAX = 9,
SVG_PRESERVEASPECTRATIO_XMAXYMAX = 10
};
// These constants represent the range of valid enum values for the <align>
// parameter. They exclude the sentinel _UNKNOWN value.
const uint16_t SVG_ALIGN_MIN_VALID = SVG_PRESERVEASPECTRATIO_NONE;
const uint16_t SVG_ALIGN_MAX_VALID = SVG_PRESERVEASPECTRATIO_XMAXYMAX;
// Meet-or-slice Types
enum SVGMeetOrSlice : uint8_t {
SVG_MEETORSLICE_UNKNOWN = 0,
SVG_MEETORSLICE_MEET = 1,
SVG_MEETORSLICE_SLICE = 2
};
// These constants represent the range of valid enum values for the
// <meetOrSlice> parameter. They exclude the sentinel _UNKNOWN value.
const uint16_t SVG_MEETORSLICE_MIN_VALID = SVG_MEETORSLICE_MEET;
const uint16_t SVG_MEETORSLICE_MAX_VALID = SVG_MEETORSLICE_SLICE;
class SVGAnimatedPreserveAspectRatio;
class SVGPreserveAspectRatio final
{
friend class SVGAnimatedPreserveAspectRatio;
public:
SVGPreserveAspectRatio(SVGAlign aAlign, SVGMeetOrSlice aMeetOrSlice)
: mAlign(aAlign)
, mMeetOrSlice(aMeetOrSlice)
{}
bool operator==(const SVGPreserveAspectRatio& aOther) const;
explicit SVGPreserveAspectRatio()
: mAlign(SVG_PRESERVEASPECTRATIO_UNKNOWN)
, mMeetOrSlice(SVG_MEETORSLICE_UNKNOWN)
{}
nsresult SetAlign(uint16_t aAlign) {
if (aAlign < SVG_ALIGN_MIN_VALID || aAlign > SVG_ALIGN_MAX_VALID)
return NS_ERROR_FAILURE;
mAlign = static_cast<uint8_t>(aAlign);
return NS_OK;
}
SVGAlign GetAlign() const {
return static_cast<SVGAlign>(mAlign);
}
nsresult SetMeetOrSlice(uint16_t aMeetOrSlice) {
if (aMeetOrSlice < SVG_MEETORSLICE_MIN_VALID ||
aMeetOrSlice > SVG_MEETORSLICE_MAX_VALID)
return NS_ERROR_FAILURE;
mMeetOrSlice = static_cast<uint8_t>(aMeetOrSlice);
return NS_OK;
}
SVGMeetOrSlice GetMeetOrSlice() const {
return static_cast<SVGMeetOrSlice>(mMeetOrSlice);
}
uint32_t Hash() const {
return HashGeneric(mAlign, mMeetOrSlice);
}
private:
// We can't use enum types here because some compilers fail to pack them.
uint8_t mAlign;
uint8_t mMeetOrSlice;
};
namespace dom {
class DOMSVGPreserveAspectRatio final : public nsISupports,
public nsWrapperCache
{
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMSVGPreserveAspectRatio)
DOMSVGPreserveAspectRatio(SVGAnimatedPreserveAspectRatio* aVal,
nsSVGElement *aSVGElement,
bool aIsBaseValue)
: mVal(aVal), mSVGElement(aSVGElement), mIsBaseValue(aIsBaseValue)
{
}
// WebIDL
nsSVGElement* GetParentObject() const { return mSVGElement; }
virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
uint16_t Align();
void SetAlign(uint16_t aAlign, ErrorResult& rv);
uint16_t MeetOrSlice();
void SetMeetOrSlice(uint16_t aMeetOrSlice, ErrorResult& rv);
protected:
~DOMSVGPreserveAspectRatio();
SVGAnimatedPreserveAspectRatio* mVal; // kept alive because it belongs to mSVGElement
RefPtr<nsSVGElement> mSVGElement;
const bool mIsBaseValue;
};
} //namespace dom
} //namespace mozilla
#endif // MOZILLA_CONTENT_SVGPRESERVEASPECTRATIO_H_
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