content/html/content/src/HTMLImageElement.h
author Boris Zbarsky <bzbarsky@mit.edu>
Mon, 10 Mar 2014 17:38:02 -0400
changeset 191078 bb77e0285652bcb3471f426b828279deac8c34ca
parent 171986 8c91fdae3362fac2bbe186cfd56403a1b61deebd
child 191991 a07dde918187f3c244d412917144872e1a349cf3
permissions -rw-r--r--
Bug 980243. Make sure that image src sets do something even if the src is being set to the value it already has. r=sicking

/* -*- Mode: C++; tab-width: 2; 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_dom_HTMLImageElement_h
#define mozilla_dom_HTMLImageElement_h

#include "mozilla/Attributes.h"
#include "nsGenericHTMLElement.h"
#include "nsImageLoadingContent.h"
#include "nsIDOMHTMLImageElement.h"
#include "imgRequestProxy.h"
#include "Units.h"

namespace mozilla {
namespace dom {

class HTMLImageElement MOZ_FINAL : public nsGenericHTMLElement,
                                   public nsImageLoadingContent,
                                   public nsIDOMHTMLImageElement
{
public:
  explicit HTMLImageElement(already_AddRefed<nsINodeInfo> aNodeInfo);
  virtual ~HTMLImageElement();

  static already_AddRefed<HTMLImageElement>
    Image(const GlobalObject& aGlobal,
          const Optional<uint32_t>& aWidth,
          const Optional<uint32_t>& aHeight,
          ErrorResult& aError);

  // nsISupports
  NS_DECL_ISUPPORTS_INHERITED

  virtual bool Draggable() const MOZ_OVERRIDE;

  // nsIDOMHTMLImageElement
  NS_DECL_NSIDOMHTMLIMAGEELEMENT

  // override from nsImageLoadingContent
  CORSMode GetCORSMode();

  // nsIContent
  virtual bool ParseAttribute(int32_t aNamespaceID,
                                nsIAtom* aAttribute,
                                const nsAString& aValue,
                                nsAttrValue& aResult) MOZ_OVERRIDE;
  virtual nsChangeHint GetAttributeChangeHint(const nsIAtom* aAttribute,
                                              int32_t aModType) const MOZ_OVERRIDE;
  NS_IMETHOD_(bool) IsAttributeMapped(const nsIAtom* aAttribute) const MOZ_OVERRIDE;
  virtual nsMapRuleToAttributesFunc GetAttributeMappingFunction() const MOZ_OVERRIDE;

  virtual nsresult PreHandleEvent(nsEventChainPreVisitor& aVisitor) MOZ_OVERRIDE;

  bool IsHTMLFocusable(bool aWithMouse, bool *aIsFocusable, int32_t *aTabIndex) MOZ_OVERRIDE;

  // SetAttr override.  C++ is stupid, so have to override both
  // overloaded methods.
  nsresult SetAttr(int32_t aNameSpaceID, nsIAtom* aName,
                   const nsAString& aValue, bool aNotify)
  {
    return SetAttr(aNameSpaceID, aName, nullptr, aValue, aNotify);
  }
  virtual nsresult SetAttr(int32_t aNameSpaceID, nsIAtom* aName,
                           nsIAtom* aPrefix, const nsAString& aValue,
                           bool aNotify) MOZ_OVERRIDE;

  virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
                              nsIContent* aBindingParent,
                              bool aCompileEventHandlers) MOZ_OVERRIDE;
  virtual void UnbindFromTree(bool aDeep, bool aNullParent) MOZ_OVERRIDE;

  virtual nsEventStates IntrinsicState() const MOZ_OVERRIDE;
  virtual nsresult Clone(nsINodeInfo *aNodeInfo, nsINode **aResult) const MOZ_OVERRIDE;

  nsresult CopyInnerTo(Element* aDest);

  void MaybeLoadImage();

  bool IsMap()
  {
    return GetBoolAttr(nsGkAtoms::ismap);
  }
  void SetIsMap(bool aIsMap, ErrorResult& aError)
  {
    SetHTMLBoolAttr(nsGkAtoms::ismap, aIsMap, aError);
  }
  uint32_t Width()
  {
    return GetWidthHeightForImage(mCurrentRequest).width;
  }
  void SetWidth(uint32_t aWidth, ErrorResult& aError)
  {
    SetUnsignedIntAttr(nsGkAtoms::width, aWidth, aError);
  }
  uint32_t Height()
  {
    return GetWidthHeightForImage(mCurrentRequest).height;
  }
  void SetHeight(uint32_t aHeight, ErrorResult& aError)
  {
    SetUnsignedIntAttr(nsGkAtoms::height, aHeight, aError);
  }
  uint32_t NaturalWidth();
  uint32_t NaturalHeight();
  bool Complete();
  uint32_t Hspace()
  {
    return GetUnsignedIntAttr(nsGkAtoms::hspace, 0);
  }
  void SetHspace(uint32_t aHspace, ErrorResult& aError)
  {
    SetUnsignedIntAttr(nsGkAtoms::hspace, aHspace, aError);
  }
  uint32_t Vspace()
  {
    return GetUnsignedIntAttr(nsGkAtoms::vspace, 0);
  }
  void SetVspace(uint32_t aVspace, ErrorResult& aError)
  {
    SetUnsignedIntAttr(nsGkAtoms::vspace, aVspace, aError);
  }

  // The XPCOM versions of the following getters work for Web IDL bindings as well
  void SetAlt(const nsAString& aAlt, ErrorResult& aError)
  {
    SetHTMLAttr(nsGkAtoms::alt, aAlt, aError);
  }
  void SetSrc(const nsAString& aSrc, ErrorResult& aError)
  {
    SetHTMLAttr(nsGkAtoms::src, aSrc, aError);
  }
  void SetCrossOrigin(const nsAString& aCrossOrigin, ErrorResult& aError)
  {
    SetHTMLAttr(nsGkAtoms::crossorigin, aCrossOrigin, aError);
  }
  void SetUseMap(const nsAString& aUseMap, ErrorResult& aError)
  {
    SetHTMLAttr(nsGkAtoms::usemap, aUseMap, aError);
  }
  void SetName(const nsAString& aName, ErrorResult& aError)
  {
    SetHTMLAttr(nsGkAtoms::name, aName, aError);
  }
  void SetAlign(const nsAString& aAlign, ErrorResult& aError)
  {
    SetHTMLAttr(nsGkAtoms::align, aAlign, aError);
  }
  void SetLongDesc(const nsAString& aLongDesc, ErrorResult& aError)
  {
    SetHTMLAttr(nsGkAtoms::longdesc, aLongDesc, aError);
  }
  void SetBorder(const nsAString& aBorder, ErrorResult& aError)
  {
    SetHTMLAttr(nsGkAtoms::border, aBorder, aError);
  }

  int32_t X();
  int32_t Y();
  // Uses XPCOM GetLowsrc.
  void SetLowsrc(const nsAString& aLowsrc, ErrorResult& aError)
  {
    SetHTMLAttr(nsGkAtoms::lowsrc, aLowsrc, aError);
  }

#ifdef DEBUG
  nsIDOMHTMLFormElement* GetForm() const;
#endif
  void SetForm(nsIDOMHTMLFormElement* aForm);
  void ClearForm(bool aRemoveFromForm);

protected:
  CSSIntPoint GetXY();
  virtual void GetItemValueText(nsAString& text) MOZ_OVERRIDE;
  virtual void SetItemValueText(const nsAString& text) MOZ_OVERRIDE;
  virtual JSObject* WrapNode(JSContext *aCx,
                             JS::Handle<JSObject*> aScope) MOZ_OVERRIDE;
  void UpdateFormOwner();

  virtual nsresult BeforeSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
                                 const nsAttrValueOrString* aValue,
                                 bool aNotify) MOZ_OVERRIDE;

  virtual nsresult AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
                                const nsAttrValue* aValue, bool aNotify) MOZ_OVERRIDE;

  // This is a weak reference that this element and the HTMLFormElement
  // cooperate in maintaining.
  HTMLFormElement* mForm;

private:
  static void MapAttributesIntoRule(const nsMappedAttributes* aAttributes,
                                    nsRuleData* aData);
};

} // namespace dom
} // namespace mozilla

#endif /* mozilla_dom_HTMLImageElement_h */