/* -*- 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 1.0 (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.
 */
#include "nsIDOMHTMLParagraphElement.h"
#include "nsIScriptObjectOwner.h"
#include "nsIDOMEventReceiver.h"
#include "nsIHTMLContent.h"
#include "nsGenericHTMLElement.h"
#include "nsHTMLAtoms.h"
#include "nsHTMLIIDs.h"
#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsIPresContext.h"
#include "nsIHTMLAttributes.h"

// XXX missing nav attributes

static NS_DEFINE_IID(kIDOMHTMLParagraphElementIID, NS_IDOMHTMLPARAGRAPHELEMENT_IID);

class nsHTMLParagraphElement : public nsIDOMHTMLParagraphElement,
                               public nsIScriptObjectOwner,
                               public nsIDOMEventReceiver,
                               public nsIHTMLContent
{
public:
  nsHTMLParagraphElement();
  virtual ~nsHTMLParagraphElement();

  // 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)

  // nsIDOMHTMLParagraphElement
  NS_IMETHOD GetAlign(nsString& aAlign);
  NS_IMETHOD SetAlign(const nsString& aAlign);

  // 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)

protected:
  nsGenericHTMLContainerElement mInner;

  friend nsresult NS_NewHTMLParagraphElement(nsIHTMLContent**, nsIAtom*);
};

nsresult
NS_NewHTMLParagraphElement(nsIHTMLContent** aInstancePtrResult, nsIAtom* aTag)
{
  NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
  if (nsnull == aInstancePtrResult) {
    return NS_ERROR_NULL_POINTER;
  }
  nsHTMLParagraphElement* it;
  NS_NEWXPCOM(it, nsHTMLParagraphElement);
  if (nsnull == it) {
    return NS_ERROR_OUT_OF_MEMORY;
  }
  it->mInner.Init(it, aTag);
  return it->QueryInterface(kIHTMLContentIID, (void**) aInstancePtrResult);
}

nsHTMLParagraphElement::nsHTMLParagraphElement()
{
  NS_INIT_REFCNT();
}

nsHTMLParagraphElement::~nsHTMLParagraphElement()
{
}

NS_IMPL_ADDREF(nsHTMLParagraphElement)

NS_IMPL_RELEASE(nsHTMLParagraphElement)

nsresult
nsHTMLParagraphElement::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
  NS_IMPL_HTML_CONTENT_QUERY_INTERFACE(aIID, aInstancePtr, this)
  if (aIID.Equals(kIDOMHTMLParagraphElementIID)) {
    nsIDOMHTMLParagraphElement* tmp = this;
    *aInstancePtr = (void*) tmp;
    mRefCnt++;
    return NS_OK;
  }
  return NS_NOINTERFACE;
}

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

NS_IMPL_STRING_ATTR(nsHTMLParagraphElement, Align, align)

NS_IMETHODIMP
nsHTMLParagraphElement::StringToAttribute(nsIAtom* aAttribute,
                                          const nsString& aValue,
                                          nsHTMLValue& aResult)
{
  if (aAttribute == nsHTMLAtoms::align) {
    if (nsGenericHTMLElement::ParseDivAlignValue(aValue, aResult)) {
      return NS_CONTENT_ATTR_HAS_VALUE;
    }
  }
  return NS_CONTENT_ATTR_NOT_THERE;
}

NS_IMETHODIMP
nsHTMLParagraphElement::AttributeToString(nsIAtom* aAttribute,
                                          const nsHTMLValue& aValue,
                                          nsString& aResult) const
{
  if (aAttribute == nsHTMLAtoms::align) {
    if (eHTMLUnit_Enumerated == aValue.GetUnit()) {
      nsGenericHTMLElement::DivAlignValueToString(aValue, aResult);
      return NS_CONTENT_ATTR_HAS_VALUE;
    }
  }
  return mInner.AttributeToString(aAttribute, aValue, aResult);
}

static void
MapAttributesInto(nsIHTMLAttributes* aAttributes,
                  nsIStyleContext* aContext,
                  nsIPresContext* aPresContext)
{
  if (nsnull != aAttributes) {
    nsHTMLValue value;
    aAttributes->GetAttribute(nsHTMLAtoms::align, value);
    if (value.GetUnit() == eHTMLUnit_Enumerated) {
      nsStyleText* text = (nsStyleText*)
        aContext->GetMutableStyleData(eStyleStruct_Text);
      text->mTextAlign = value.GetIntValue();
    }
  }
  nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aContext, aPresContext);
}

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



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

NS_IMETHODIMP
nsHTMLParagraphElement::GetStyleHintForAttributeChange(
    const nsIAtom* aAttribute,
    PRInt32 *aHint) const
{
  nsGenericHTMLElement::GetStyleHintForCommonAttributes(this, aAttribute, aHint);
  return NS_OK;
}
