content/svg/content/src/nsSVGUseElement.h
author Michael Wu <mwu@mozilla.com>
Wed, 28 Sep 2011 23:19:26 -0700
changeset 79445 e7854b4d29ba905ae3994f821b160c989bac4260
parent 72186 30c1b4519b2ab055f22ed4aaef1c0973296db808
child 80038 d85e3d033bf1d32cc99512674f2c6a81bd1454c3
child 112094 cad26d2fb5af799dfe030fd2a8948d617eac2f52
permissions -rw-r--r--
Bug 675553 - Switch from PRBool to bool on a CLOSED TREE , r=bsmedberg,khuey,bz,cjones

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 *
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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Mozilla SVG project.
 *
 * The Initial Developer of the Original Code is IBM Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2004
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
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 * either of the GNU General Public License Version 2 or later (the "GPL"),
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#ifndef __NS_SVGUSEELEMENT_H__
#define __NS_SVGUSEELEMENT_H__

#include "nsIDOMSVGAnimatedString.h"
#include "nsIDOMSVGURIReference.h"
#include "nsIDOMSVGUseElement.h"
#include "nsStubMutationObserver.h"
#include "nsSVGGraphicElement.h"
#include "nsSVGLength2.h"
#include "nsSVGString.h"
#include "nsTArray.h"
#include "nsReferencedElement.h"
#include "mozilla/dom/FromParser.h"

class nsIContent;
class nsINodeInfo;

#define NS_SVG_USE_ELEMENT_IMPL_CID \
{ 0x55fb86fe, 0xd81f, 0x4ae4, \
  { 0x80, 0x3f, 0xeb, 0x90, 0xfe, 0xe0, 0x7a, 0xe9 } }

nsresult
NS_NewSVGSVGElement(nsIContent **aResult,
                    already_AddRefed<nsINodeInfo> aNodeInfo,
                    mozilla::dom::FromParser aFromParser);

typedef nsSVGGraphicElement nsSVGUseElementBase;

class nsSVGUseElement : public nsSVGUseElementBase,
                        public nsIDOMSVGURIReference,
                        public nsIDOMSVGUseElement,
                        public nsStubMutationObserver
{
  friend class nsSVGUseFrame;
protected:
  friend nsresult NS_NewSVGUseElement(nsIContent **aResult,
                                      already_AddRefed<nsINodeInfo> aNodeInfo);
  nsSVGUseElement(already_AddRefed<nsINodeInfo> aNodeInfo);
  virtual ~nsSVGUseElement();
  
public:
  NS_DECLARE_STATIC_IID_ACCESSOR(NS_SVG_USE_ELEMENT_IMPL_CID)

  // interfaces:
  
  NS_DECL_ISUPPORTS_INHERITED
  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsSVGUseElement, nsSVGUseElementBase)
  NS_DECL_NSIDOMSVGUSEELEMENT
  NS_DECL_NSIDOMSVGURIREFERENCE

  NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
  NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
  NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
  NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
  NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
  NS_DECL_NSIMUTATIONOBSERVER_NODEWILLBEDESTROYED

  // xxx I wish we could use virtual inheritance
  NS_FORWARD_NSIDOMNODE(nsSVGUseElementBase::)
  NS_FORWARD_NSIDOMELEMENT(nsSVGUseElementBase::)
  NS_FORWARD_NSIDOMSVGELEMENT(nsSVGUseElementBase::)

  // for nsSVGUseFrame's nsIAnonymousContentCreator implementation.
  nsIContent* CreateAnonymousContent();
  nsIContent* GetAnonymousContent() const { return mClone; }
  void DestroyAnonymousContent();

  // nsSVGElement specializations:
  virtual gfxMatrix PrependLocalTransformTo(const gfxMatrix &aMatrix) const;
  virtual void DidChangeLength(PRUint8 aAttrEnum, bool aDoSetAttr);
  virtual void DidAnimateLength(PRUint8 aAttrEnum);
  virtual void DidChangeString(PRUint8 aAttrEnum);
  virtual void DidAnimateString(PRUint8 aAttrEnum);

  // nsIContent interface
  virtual nsresult Clone(nsINodeInfo *aNodeInfo, nsINode **aResult) const;
  NS_IMETHOD_(bool) IsAttributeMapped(const nsIAtom* aAttribute) const;

  virtual nsXPCClassInfo* GetClassInfo();
protected:
  class SourceReference : public nsReferencedElement {
  public:
    SourceReference(nsSVGUseElement* aContainer) : mContainer(aContainer) {}
  protected:
    virtual void ElementChanged(Element* aFrom, Element* aTo) {
      nsReferencedElement::ElementChanged(aFrom, aTo);
      if (aFrom) {
        aFrom->RemoveMutationObserver(mContainer);
      }
      mContainer->TriggerReclone();
    }
  private:
    nsSVGUseElement* mContainer;
  };

  virtual LengthAttributesInfo GetLengthInfo();
  virtual StringAttributesInfo GetStringInfo();

  bool HasValidDimensions();
  void SyncWidthHeight(PRUint8 aAttrEnum);
  void LookupHref();
  void TriggerReclone();
  void UnlinkSource();

  enum { X, Y, WIDTH, HEIGHT };
  nsSVGLength2 mLengthAttributes[4];
  static LengthInfo sLengthInfo[4];

  enum { HREF };
  nsSVGString mStringAttributes[1];
  static StringInfo sStringInfo[1];

  nsCOMPtr<nsIContent> mOriginal; // if we've been cloned, our "real" copy
  nsCOMPtr<nsIContent> mClone;    // cloned tree
  SourceReference      mSource;   // observed element
};

NS_DEFINE_STATIC_IID_ACCESSOR(nsSVGUseElement, NS_SVG_USE_ELEMENT_IMPL_CID)

#endif