/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * The contents of this file are subject to the Netscape 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/NPL/
 *
 * 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 Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */
#include "nsIDOMHTMLAreaElement.h"
#include "nsIScriptObjectOwner.h"
#include "nsIDOMEventReceiver.h"
#include "nsIHTMLContent.h"
#include "nsGenericHTMLElement.h"
#include "nsHTMLAtoms.h"
#include "nsHTMLIIDs.h"
#include "nsIStyleContext.h"
#include "nsIMutableStyleContext.h"
#include "nsStyleConsts.h"
#include "nsIPresContext.h"
#include "nsIFocusableContent.h"
#include "nsIEventStateManager.h"

static NS_DEFINE_IID(kIDOMHTMLAreaElementIID, NS_IDOMHTMLAREAELEMENT_IID);
static NS_DEFINE_IID(kIFocusableContentIID, NS_IFOCUSABLECONTENT_IID);

class nsHTMLAreaElement : public nsIDOMHTMLAreaElement,
                          public nsIScriptObjectOwner,
                          public nsIDOMEventReceiver,
                          public nsIHTMLContent,
                          public nsIFocusableContent
{
public:
  nsHTMLAreaElement(nsIAtom* aTag);
  virtual ~nsHTMLAreaElement();

  // nsISupports
  NS_DECL_ISUPPORTS

  // nsIDOMNode
  NS_IMPL_IDOMNODE_USING_GENERIC(mInner)

  // nsIDOMElement
  NS_IMPL_IDOMELEMENT_USING_GENERIC(mInner)

  // nsIDOMHTMLElement
  NS_IMPL_IDOMHTMLELEMENT_USING_GENERIC(mInner)

  // nsIDOMHTMLAreaElement
  NS_IMETHOD GetAccessKey(nsString& aAccessKey);
  NS_IMETHOD SetAccessKey(const nsString& aAccessKey);
  NS_IMETHOD GetAlt(nsString& aAlt);
  NS_IMETHOD SetAlt(const nsString& aAlt);
  NS_IMETHOD GetCoords(nsString& aCoords);
  NS_IMETHOD SetCoords(const nsString& aCoords);
  NS_IMETHOD GetHref(nsString& aHref);
  NS_IMETHOD SetHref(const nsString& aHref);
  NS_IMETHOD GetNoHref(PRBool* aNoHref);
  NS_IMETHOD SetNoHref(PRBool aNoHref);
  NS_IMETHOD GetShape(nsString& aShape);
  NS_IMETHOD SetShape(const nsString& aShape);
  NS_IMETHOD GetTabIndex(PRInt32* aTabIndex);
  NS_IMETHOD SetTabIndex(PRInt32 aTabIndex);
  NS_IMETHOD GetTarget(nsString& aTarget);
  NS_IMETHOD SetTarget(const nsString& aTarget);

  // nsIScriptObjectOwner
  NS_IMPL_ISCRIPTOBJECTOWNER_USING_GENERIC(mInner)

  // nsIDOMEventReceiver
  NS_IMPL_IDOMEVENTRECEIVER_USING_GENERIC(mInner)

  // nsIContent
  NS_IMPL_ICONTENT_USING_GENERIC(mInner)

  // nsIHTMLContent
  NS_IMPL_IHTMLCONTENT_USING_GENERIC(mInner)

  // nsIFocusableContent
  NS_IMETHOD SetFocus(nsIPresContext* aPresContext);
  NS_IMETHOD RemoveFocus(nsIPresContext* aPresContext);

protected:
  nsGenericHTMLLeafElement mInner;
};

nsresult
NS_NewHTMLAreaElement(nsIHTMLContent** aInstancePtrResult, nsIAtom* aTag)
{
  NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
  if (nsnull == aInstancePtrResult) {
    return NS_ERROR_NULL_POINTER;
  }
  nsIHTMLContent* it = new nsHTMLAreaElement(aTag);
  if (nsnull == it) {
    return NS_ERROR_OUT_OF_MEMORY;
  }
  return it->QueryInterface(kIHTMLContentIID, (void**) aInstancePtrResult);
}


nsHTMLAreaElement::nsHTMLAreaElement(nsIAtom* aTag)
{
  NS_INIT_REFCNT();
  mInner.Init(this, aTag);
}

nsHTMLAreaElement::~nsHTMLAreaElement()
{
}

NS_IMPL_ADDREF(nsHTMLAreaElement)

NS_IMPL_RELEASE(nsHTMLAreaElement)

nsresult
nsHTMLAreaElement::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
  NS_IMPL_HTML_CONTENT_QUERY_INTERFACE(aIID, aInstancePtr, this)
  if (aIID.Equals(kIDOMHTMLAreaElementIID)) {
    nsIDOMHTMLAreaElement* tmp = this;
    *aInstancePtr = (void*) tmp;
    NS_ADDREF_THIS();
    return NS_OK;
  }
  else if (aIID.Equals(kIFocusableContentIID)) {
    *aInstancePtr = (void*)(nsIFocusableContent*) this;
    NS_ADDREF_THIS();
    return NS_OK;
  }
  return NS_NOINTERFACE;
}

nsresult
nsHTMLAreaElement::CloneNode(PRBool aDeep, nsIDOMNode** aReturn)
{
  nsHTMLAreaElement* it = new nsHTMLAreaElement(mInner.mTag);
  if (nsnull == it) {
    return NS_ERROR_OUT_OF_MEMORY;
  }
  mInner.CopyInnerTo(this, &it->mInner, aDeep);
  return it->QueryInterface(kIDOMNodeIID, (void**) aReturn);
}

NS_IMPL_STRING_ATTR(nsHTMLAreaElement, AccessKey, accesskey)
NS_IMPL_STRING_ATTR(nsHTMLAreaElement, Alt, alt)
NS_IMPL_STRING_ATTR(nsHTMLAreaElement, Coords, coords)
NS_IMPL_STRING_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_IMPL_STRING_ATTR(nsHTMLAreaElement, Target, target)

NS_IMETHODIMP
nsHTMLAreaElement::StringToAttribute(nsIAtom* aAttribute,
                                     const nsString& aValue,
                                     nsHTMLValue& aResult)
{
  if (aAttribute == nsHTMLAtoms::nohref) {
    aResult.SetEmptyValue();
    return NS_CONTENT_ATTR_HAS_VALUE;
  }
  else if (aAttribute == nsHTMLAtoms::tabindex) {
    if (nsGenericHTMLElement::ParseValue(aValue, 0, aResult, eHTMLUnit_Integer)) {
      return NS_CONTENT_ATTR_HAS_VALUE;
    }
  }

  return NS_CONTENT_ATTR_NOT_THERE;
}

NS_IMETHODIMP
nsHTMLAreaElement::AttributeToString(nsIAtom* aAttribute,
                                     const nsHTMLValue& aValue,
                                     nsString& aResult) const
{
  return mInner.AttributeToString(aAttribute, aValue, aResult);
}

static void
MapAttributesInto(const nsIHTMLMappedAttributes* aAttributes,
                  nsIMutableStyleContext* aContext,
                  nsIPresContext* aPresContext)
{
  nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aContext, aPresContext);
}

NS_IMETHODIMP
nsHTMLAreaElement::GetMappedAttributeImpact(const nsIAtom* aAttribute,
                                            PRInt32& aHint) const

{
  if (! nsGenericHTMLElement::GetCommonMappedAttributesImpact(aAttribute, aHint)) {
    aHint = NS_STYLE_HINT_CONTENT;
  }
  return NS_OK;
}


NS_IMETHODIMP
nsHTMLAreaElement::GetAttributeMappingFunctions(nsMapAttributesFunc& aFontMapFunc,
                                                nsMapAttributesFunc& aMapFunc) const
{
  aFontMapFunc = nsnull;
  aMapFunc = &MapAttributesInto;
  return NS_OK;
}


NS_IMETHODIMP
nsHTMLAreaElement::HandleDOMEvent(nsIPresContext* aPresContext,
                                  nsEvent* aEvent,
                                  nsIDOMEvent** aDOMEvent,
                                  PRUint32 aFlags,
                                  nsEventStatus* aEventStatus)
{
  return mInner.HandleDOMEvent(aPresContext, aEvent, aDOMEvent,
                               aFlags, aEventStatus);
}

NS_IMETHODIMP
nsHTMLAreaElement::SetFocus(nsIPresContext* aPresContext)
{
  nsIEventStateManager* esm;
  if (NS_OK == aPresContext->GetEventStateManager(&esm)) {
    esm->SetContentState(this, NS_EVENT_STATE_FOCUS);
    NS_RELEASE(esm);
  }

  // XXX write me
  return NS_OK;
}

NS_IMETHODIMP
nsHTMLAreaElement::RemoveFocus(nsIPresContext* aPresContext)
{
  // XXX write me
  return NS_OK;
}


NS_IMETHODIMP
nsHTMLAreaElement::SizeOf(nsISizeOfHandler* aSizer, PRUint32* aResult) const
{
  return mInner.SizeOf(aSizer, aResult, sizeof(*this));
}