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/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * 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 Mozilla Communicator client code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */
#include "nsIDOMHTMLAreaElement.h"
#include "nsIDOMEventTarget.h"
#include "nsGenericHTMLElement.h"
#include "nsILink.h"
#include "nsGkAtoms.h"
#include "nsStyleConsts.h"
#include "nsIURL.h"
#include "nsNetUtil.h"
#include "nsReadableUtils.h"
#include "nsIDocument.h"

#include "Link.h"
using namespace mozilla::dom;

class nsHTMLAreaElement : public nsGenericHTMLElement,
                          public nsIDOMHTMLAreaElement,
                          public nsILink,
                          public Link
{
public:
  nsHTMLAreaElement(already_AddRefed<nsINodeInfo> aNodeInfo);
  virtual ~nsHTMLAreaElement();

  // nsISupports
  NS_DECL_ISUPPORTS_INHERITED

  // nsIDOMNode
  NS_FORWARD_NSIDOMNODE(nsGenericHTMLElement::)

  // nsIDOMElement
  NS_FORWARD_NSIDOMELEMENT(nsGenericHTMLElement::)

  // nsIDOMHTMLElement
  NS_FORWARD_NSIDOMHTMLELEMENT_BASIC(nsGenericHTMLElement::)
  NS_SCRIPTABLE NS_IMETHOD Click() {
    return nsGenericHTMLElement::Click();
  }
  NS_SCRIPTABLE NS_IMETHOD GetTabIndex(PRInt32* aTabIndex);
  NS_SCRIPTABLE NS_IMETHOD SetTabIndex(PRInt32 aTabIndex);
  NS_SCRIPTABLE NS_IMETHOD Focus() {
    return nsGenericHTMLElement::Focus();
  }
  NS_SCRIPTABLE NS_IMETHOD GetDraggable(bool* aDraggable) {
    return nsGenericHTMLElement::GetDraggable(aDraggable);
  }
  NS_SCRIPTABLE NS_IMETHOD GetInnerHTML(nsAString& aInnerHTML) {
    return nsGenericHTMLElement::GetInnerHTML(aInnerHTML);
  }
  NS_SCRIPTABLE NS_IMETHOD SetInnerHTML(const nsAString& aInnerHTML) {
    return nsGenericHTMLElement::SetInnerHTML(aInnerHTML);
  }

  // nsIDOMHTMLAreaElement
  NS_DECL_NSIDOMHTMLAREAELEMENT

  // nsILink
  NS_IMETHOD LinkAdded() { return NS_OK; }
  NS_IMETHOD LinkRemoved() { return NS_OK; }

  virtual nsresult PreHandleEvent(nsEventChainPreVisitor& aVisitor);
  virtual nsresult PostHandleEvent(nsEventChainPostVisitor& aVisitor);
  virtual bool IsLink(nsIURI** aURI) const;
  virtual void GetLinkTarget(nsAString& aTarget);
  virtual nsLinkState GetLinkState() const;
  virtual already_AddRefed<nsIURI> GetHrefURI() const;

  virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
                              nsIContent* aBindingParent,
                              bool aCompileEventHandlers);
  virtual void UnbindFromTree(bool aDeep = true,
                              bool aNullParent = true);
  nsresult SetAttr(PRInt32 aNameSpaceID, nsIAtom* aName,
                   const nsAString& aValue, bool aNotify)
  {
    return SetAttr(aNameSpaceID, aName, nsnull, aValue, aNotify);
  }
  virtual nsresult SetAttr(PRInt32 aNameSpaceID, nsIAtom* aName,
                           nsIAtom* aPrefix, const nsAString& aValue,
                           bool aNotify);
  virtual nsresult UnsetAttr(PRInt32 aNameSpaceID, nsIAtom* aAttribute,
                             bool aNotify);

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

  virtual nsEventStates IntrinsicState() const;

  virtual nsXPCClassInfo* GetClassInfo();
};


NS_IMPL_NS_NEW_HTML_ELEMENT(Area)


nsHTMLAreaElement::nsHTMLAreaElement(already_AddRefed<nsINodeInfo> aNodeInfo)
  : nsGenericHTMLElement(aNodeInfo),
    Link(this)
{
}

nsHTMLAreaElement::~nsHTMLAreaElement()
{
}

NS_IMPL_ADDREF_INHERITED(nsHTMLAreaElement, nsGenericElement) 
NS_IMPL_RELEASE_INHERITED(nsHTMLAreaElement, nsGenericElement) 

DOMCI_NODE_DATA(HTMLAreaElement, nsHTMLAreaElement)

// QueryInterface implementation for nsHTMLAreaElement
NS_INTERFACE_TABLE_HEAD(nsHTMLAreaElement)
  NS_HTML_CONTENT_INTERFACE_TABLE3(nsHTMLAreaElement,
                                   nsIDOMHTMLAreaElement,
                                   nsILink,
                                   Link)
  NS_HTML_CONTENT_INTERFACE_TABLE_TO_MAP_SEGUE(nsHTMLAreaElement,
                                               nsGenericHTMLElement)
NS_HTML_CONTENT_INTERFACE_TABLE_TAIL_CLASSINFO(HTMLAreaElement)


NS_IMPL_ELEMENT_CLONE(nsHTMLAreaElement)


NS_IMPL_STRING_ATTR(nsHTMLAreaElement, Alt, alt)
NS_IMPL_STRING_ATTR(nsHTMLAreaElement, Coords, coords)
NS_IMPL_URI_ATTR(nsHTMLAreaElement, Href, href)
NS_IMPL_BOOL_ATTR(nsHTMLAreaElement, NoHref, nohref)
NS_IMPL_STRING_ATTR(nsHTMLAreaElement, Shape, shape)
NS_IMPL_INT_ATTR(nsHTMLAreaElement, TabIndex, tabindex)

NS_IMETHODIMP
nsHTMLAreaElement::GetTarget(nsAString& aValue)
{
  if (!GetAttr(kNameSpaceID_None, nsGkAtoms::target, aValue)) {
    GetBaseTarget(aValue);
  }
  return NS_OK;
}

NS_IMETHODIMP
nsHTMLAreaElement::SetTarget(const nsAString& aValue)
{
  return SetAttr(kNameSpaceID_None, nsGkAtoms::target, aValue, true);
}

nsresult
nsHTMLAreaElement::PreHandleEvent(nsEventChainPreVisitor& aVisitor)
{
  return PreHandleEventForAnchors(aVisitor);
}

nsresult
nsHTMLAreaElement::PostHandleEvent(nsEventChainPostVisitor& aVisitor)
{
  return PostHandleEventForAnchors(aVisitor);
}

bool
nsHTMLAreaElement::IsLink(nsIURI** aURI) const
{
  return IsHTMLLink(aURI);
}

void
nsHTMLAreaElement::GetLinkTarget(nsAString& aTarget)
{
  GetAttr(kNameSpaceID_None, nsGkAtoms::target, aTarget);
  if (aTarget.IsEmpty()) {
    GetBaseTarget(aTarget);
  }
}

nsresult
nsHTMLAreaElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
                              nsIContent* aBindingParent,
                              bool aCompileEventHandlers)
{
  Link::ResetLinkState(false);
  if (aDocument) {
    aDocument->RegisterPendingLinkUpdate(this);
  }
  
  return nsGenericHTMLElement::BindToTree(aDocument, aParent,
                                                 aBindingParent,
                                                 aCompileEventHandlers);
}

void
nsHTMLAreaElement::UnbindFromTree(bool aDeep, bool aNullParent)
{
  // If this link is ever reinserted into a document, it might
  // be under a different xml:base, so forget the cached state now.
  Link::ResetLinkState(false);
  
  nsIDocument* doc = GetCurrentDoc();
  if (doc) {
    doc->UnregisterPendingLinkUpdate(this);
  }

  nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);
}

nsresult
nsHTMLAreaElement::SetAttr(PRInt32 aNameSpaceID, nsIAtom* aName,
                           nsIAtom* aPrefix, const nsAString& aValue,
                           bool aNotify)
{
  nsresult rv =
    nsGenericHTMLElement::SetAttr(aNameSpaceID, aName, aPrefix, aValue, aNotify);

  // The ordering of the parent class's SetAttr call and Link::ResetLinkState
  // is important here!  The attribute is not set until SetAttr returns, and
  // we will need the updated attribute value because notifying the document
  // that content states have changed will call IntrinsicState, which will try
  // to get updated information about the visitedness from Link.
  if (aName == nsGkAtoms::href && aNameSpaceID == kNameSpaceID_None) {
    Link::ResetLinkState(!!aNotify);
  }

  return rv;
}

nsresult
nsHTMLAreaElement::UnsetAttr(PRInt32 aNameSpaceID, nsIAtom* aAttribute,
                             bool aNotify)
{
  nsresult rv = nsGenericHTMLElement::UnsetAttr(aNameSpaceID, aAttribute,
                                                aNotify);

  // The ordering of the parent class's UnsetAttr call and Link::ResetLinkState
  // is important here!  The attribute is not unset until UnsetAttr returns, and
  // we will need the updated attribute value because notifying the document
  // that content states have changed will call IntrinsicState, which will try
  // to get updated information about the visitedness from Link.
  if (aAttribute == nsGkAtoms::href && kNameSpaceID_None == aNameSpaceID) {
    Link::ResetLinkState(!!aNotify);
  }

  return rv;
}

#define IMPL_URI_PART(_part)                                 \
  NS_IMETHODIMP                                              \
  nsHTMLAreaElement::Get##_part(nsAString& a##_part)         \
  {                                                          \
    return Link::Get##_part(a##_part);                       \
  }                                                          \
  NS_IMETHODIMP                                              \
  nsHTMLAreaElement::Set##_part(const nsAString& a##_part)   \
  {                                                          \
    return Link::Set##_part(a##_part);                       \
  }

IMPL_URI_PART(Protocol)
IMPL_URI_PART(Host)
IMPL_URI_PART(Hostname)
IMPL_URI_PART(Pathname)
IMPL_URI_PART(Search)
IMPL_URI_PART(Port)
IMPL_URI_PART(Hash)

#undef IMPL_URI_PART

NS_IMETHODIMP
nsHTMLAreaElement::ToString(nsAString& aSource)
{
  return GetHref(aSource);
}

NS_IMETHODIMP    
nsHTMLAreaElement::GetPing(nsAString& aValue)
{
  return GetURIListAttr(nsGkAtoms::ping, aValue);
}

NS_IMETHODIMP
nsHTMLAreaElement::SetPing(const nsAString& aValue)
{
  return SetAttr(kNameSpaceID_None, nsGkAtoms::ping, aValue, true);
}

nsLinkState
nsHTMLAreaElement::GetLinkState() const
{
  return Link::GetLinkState();
}

already_AddRefed<nsIURI>
nsHTMLAreaElement::GetHrefURI() const
{
  return GetHrefURIForAnchors();
}

nsEventStates
nsHTMLAreaElement::IntrinsicState() const
{
  return Link::LinkState() | nsGenericHTMLElement::IntrinsicState();
}
