mirror of
https://github.com/classilla/tenfourfox.git
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247 lines
7.0 KiB
C
247 lines
7.0 KiB
C
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/* -*- 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 __NS_SVGVIEWBOX_H__
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#define __NS_SVGVIEWBOX_H__
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#include "nsAutoPtr.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsError.h"
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#include "mozilla/dom/SVGAnimatedRect.h"
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#include "mozilla/dom/SVGIRect.h"
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#include "nsISMILAttr.h"
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#include "nsSVGElement.h"
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#include "mozilla/Attributes.h"
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#include "nsSVGAttrTearoffTable.h"
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class nsSMILValue;
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namespace mozilla {
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namespace dom {
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class SVGAnimationElement;
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} // namespace dom
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} // namespace mozilla
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struct nsSVGViewBoxRect
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{
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float x, y;
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float width, height;
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bool none;
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nsSVGViewBoxRect() : none(true) {}
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nsSVGViewBoxRect(float aX, float aY, float aWidth, float aHeight) :
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x(aX), y(aY), width(aWidth), height(aHeight), none(false) {}
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nsSVGViewBoxRect(const nsSVGViewBoxRect& rhs) :
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x(rhs.x), y(rhs.y), width(rhs.width), height(rhs.height), none(rhs.none) {}
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bool operator==(const nsSVGViewBoxRect& aOther) const;
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};
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class nsSVGViewBox
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{
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public:
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void Init();
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/**
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* Returns true if the corresponding "viewBox" attribute defined a rectangle
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* with finite values. Returns false if the viewBox was set to an invalid
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* string, or if any of the four rect values were too big to store in a
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* float.
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*
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* This method does not check whether the width or height values are
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* positive, so callers must check whether the viewBox rect is valid where
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* necessary!
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*/
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bool HasRect() const
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{ return (mAnimVal && !mAnimVal->none) ||
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(!mAnimVal && mHasBaseVal && !mBaseVal.none); }
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/**
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* Returns true if the corresponding "viewBox" attribute either defined a
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* rectangle with finite values or the special "none" value.
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*/
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bool IsExplicitlySet() const
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{ return mAnimVal || mHasBaseVal; }
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const nsSVGViewBoxRect& GetBaseValue() const
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{ return mBaseVal; }
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void SetBaseValue(const nsSVGViewBoxRect& aRect,
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nsSVGElement *aSVGElement);
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const nsSVGViewBoxRect& GetAnimValue() const
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{ return mAnimVal ? *mAnimVal : mBaseVal; }
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void SetAnimValue(const nsSVGViewBoxRect& aRect,
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nsSVGElement *aSVGElement);
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nsresult SetBaseValueString(const nsAString& aValue,
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nsSVGElement *aSVGElement,
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bool aDoSetAttr);
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void GetBaseValueString(nsAString& aValue) const;
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already_AddRefed<mozilla::dom::SVGAnimatedRect>
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ToSVGAnimatedRect(nsSVGElement *aSVGElement);
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already_AddRefed<mozilla::dom::SVGIRect>
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ToDOMBaseVal(nsSVGElement* aSVGElement);
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already_AddRefed<mozilla::dom::SVGIRect>
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ToDOMAnimVal(nsSVGElement* aSVGElement);
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// Returns a new nsISMILAttr object that the caller must delete
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nsISMILAttr* ToSMILAttr(nsSVGElement* aSVGElement);
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private:
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nsSVGViewBoxRect mBaseVal;
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nsAutoPtr<nsSVGViewBoxRect> mAnimVal;
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bool mHasBaseVal;
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public:
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struct DOMBaseVal final : public mozilla::dom::SVGIRect
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{
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMBaseVal)
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DOMBaseVal(nsSVGViewBox *aVal, nsSVGElement *aSVGElement)
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: mozilla::dom::SVGIRect()
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, mVal(aVal)
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, mSVGElement(aSVGElement)
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{}
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nsSVGViewBox* mVal; // kept alive because it belongs to content
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RefPtr<nsSVGElement> mSVGElement;
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float X() const override final
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{
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return mVal->GetBaseValue().x;
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}
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float Y() const override final
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{
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return mVal->GetBaseValue().y;
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}
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float Width() const override final
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{
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return mVal->GetBaseValue().width;
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}
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float Height() const override final
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{
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return mVal->GetBaseValue().height;
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}
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void SetX(float aX, mozilla::ErrorResult& aRv) final override;
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void SetY(float aY, mozilla::ErrorResult& aRv) final override;
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void SetWidth(float aWidth, mozilla::ErrorResult& aRv) final override;
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void SetHeight(float aHeight, mozilla::ErrorResult& aRv) final override;
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virtual nsIContent* GetParentObject() const override
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{
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return mSVGElement;
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}
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private:
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virtual ~DOMBaseVal();
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};
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struct DOMAnimVal final : public mozilla::dom::SVGIRect
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{
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMAnimVal)
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DOMAnimVal(nsSVGViewBox *aVal, nsSVGElement *aSVGElement)
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: mozilla::dom::SVGIRect()
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, mVal(aVal)
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, mSVGElement(aSVGElement)
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{}
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nsSVGViewBox* mVal; // kept alive because it belongs to content
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RefPtr<nsSVGElement> mSVGElement;
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// Script may have modified animation parameters or timeline -- DOM getters
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// need to flush any resample requests to reflect these modifications.
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float X() const override final
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{
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mSVGElement->FlushAnimations();
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return mVal->GetAnimValue().x;
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}
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float Y() const override final
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{
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mSVGElement->FlushAnimations();
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return mVal->GetAnimValue().y;
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}
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float Width() const override final
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{
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mSVGElement->FlushAnimations();
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return mVal->GetAnimValue().width;
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}
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float Height() const override final
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{
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mSVGElement->FlushAnimations();
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return mVal->GetAnimValue().height;
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}
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void SetX(float aX, mozilla::ErrorResult& aRv) final override
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{
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aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
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}
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void SetY(float aY, mozilla::ErrorResult& aRv) final override
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{
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aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
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}
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void SetWidth(float aWidth, mozilla::ErrorResult& aRv) final override
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{
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aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
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}
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void SetHeight(float aHeight, mozilla::ErrorResult& aRv) final override
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{
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aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
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}
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virtual nsIContent* GetParentObject() const override
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{
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return mSVGElement;
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}
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private:
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virtual ~DOMAnimVal();
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};
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struct SMILViewBox : public nsISMILAttr
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{
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public:
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SMILViewBox(nsSVGViewBox* aVal, nsSVGElement* aSVGElement)
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: mVal(aVal), mSVGElement(aSVGElement) {}
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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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nsSVGViewBox* mVal;
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nsSVGElement* mSVGElement;
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// nsISMILAttr methods
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virtual nsresult ValueFromString(const nsAString& aStr,
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const mozilla::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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static nsSVGAttrTearoffTable<nsSVGViewBox, mozilla::dom::SVGAnimatedRect>
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sSVGAnimatedRectTearoffTable;
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};
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#endif // __NS_SVGVIEWBOX_H__
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