Mozilla/mozilla/layout/html/content/src/nsHTMLTitleElement.cpp

/* -*- 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 "nsIDOMHTMLTitleElement.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 "nsXIFConverter.h"
#include "nsIDOMText.h"
#include "nsIDocument.h"
#include "nsIHTMLDocument.h"

static NS_DEFINE_IID(kIDOMHTMLTitleElementIID, NS_IDOMHTMLTITLEELEMENT_IID);
static NS_DEFINE_IID(kIDOMTextIID, NS_IDOMTEXT_IID);
static NS_DEFINE_IID(kIHTMLDocumentIID, NS_IHTMLDOCUMENT_IID);

class nsHTMLTitleElement : public nsIDOMHTMLTitleElement,
                           public nsIScriptObjectOwner,
                           public nsIDOMEventReceiver,
                           public nsIHTMLContent
{
public:
  nsHTMLTitleElement(nsIAtom* aTag);
  virtual ~nsHTMLTitleElement();

  // 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)

  // nsIDOMHTMLTitleElement
  NS_IMETHOD GetText(nsString& aType);
  NS_IMETHOD SetText(const nsString& aType);

  // 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;
};

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

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

nsHTMLTitleElement::~nsHTMLTitleElement()
{
}

NS_IMPL_ADDREF(nsHTMLTitleElement)

NS_IMPL_RELEASE(nsHTMLTitleElement)

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

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

NS_IMETHODIMP
nsHTMLTitleElement::StringToAttribute(nsIAtom* aAttribute,
                                      const nsString& aValue,
                                      nsHTMLValue& aResult)
{
  return NS_CONTENT_ATTR_NOT_THERE;
}

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

static void
MapAttributesInto(nsIHTMLAttributes* aAttributes,
                  nsIStyleContext* aContext,
                  nsIPresContext* aPresContext)
{
  nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aContext, aPresContext);
}

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


NS_IMETHODIMP 
nsHTMLTitleElement::GetText(nsString& aTitle)
{
  nsresult result = NS_OK;
  nsIDOMNode* child;

  result = GetFirstChild(&child);
  if ((NS_OK == result) && (nsnull != child)) {
    nsIDOMText* text;
    
    result = child->QueryInterface(kIDOMTextIID, (void**)&text);
    if (NS_OK == result) {
      text->GetData(aTitle);
      NS_RELEASE(text);
    }
    NS_RELEASE(child);
  }

  return result;
}

NS_IMETHODIMP 
nsHTMLTitleElement::SetText(const nsString& aTitle)
{
  nsresult result = NS_OK;
  nsIDOMNode* child;
  nsIDocument* document;

  result = GetDocument(document);
  if (NS_OK == result) {
    nsIHTMLDocument* htmlDoc;
    result = document->QueryInterface(kIHTMLDocumentIID, (void**)&htmlDoc);
    if (NS_OK == result) {
      htmlDoc->SetTitle(aTitle);
      NS_RELEASE(htmlDoc);
    }   
    NS_RELEASE(document);
  }

  result = GetFirstChild(&child);
  if ((NS_OK == result) && (nsnull != child)) {
    nsIDOMText* text;
    
    result = child->QueryInterface(kIDOMTextIID, (void**)&text);
    if (NS_OK == result) {
      text->SetData(aTitle);
      NS_RELEASE(text);
    }
    NS_RELEASE(child);
  }

  return result;
}

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

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