/* -*- 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 "nsIDOMText.h"
#include "nsGenericDOMDataNode.h"
#include "nsIScriptObjectOwner.h"
#include "nsIDOMEventReceiver.h"
#include "nsIHTMLContent.h"
#include "nsITextContent.h"
#include "nsFrame.h"
#include "nsIDocument.h"
#include "nsCRT.h"

static NS_DEFINE_IID(kIDOMTextIID, NS_IDOMTEXT_IID);
static NS_DEFINE_IID(kITextContentIID, NS_ITEXT_CONTENT_IID);

/* XXX should not be html content; should be nsITextContent */

class nsTextNode : public nsIDOMText,
                   public nsIScriptObjectOwner,
                   public nsIDOMEventReceiver,
                   public nsIHTMLContent,
                   public nsITextContent
{
public:
  nsTextNode();
  ~nsTextNode();

  // nsISupports
  NS_DECL_ISUPPORTS

  // nsIDOMNode
  NS_IMPL_IDOMNODE_USING_GENERIC_DOM_DATA(mInner)

  // nsIDOMData
  NS_IMPL_IDOMDATA_USING_GENERIC_DOM_DATA(mInner)

  // nsIDOMText
  NS_IMETHOD SplitText(PRUint32 aOffset, nsIDOMText** aReturn);
  NS_IMETHOD JoinText(nsIDOMText* aNode1, nsIDOMText* aNode2,
                      nsIDOMText** aReturn);

  // nsIScriptObjectOwner
  NS_IMPL_ISCRIPTOBJECTOWNER_USING_GENERIC_DOM_DATA(mInner)

  // nsIDOMEventReceiver
  NS_IMPL_IDOMEVENTRECEIVER_USING_GENERIC_DOM_DATA(mInner)

  // nsIContent
  NS_IMPL_ICONTENT_USING_GENERIC_DOM_DATA(mInner)

  // nsIHTMLContent
  NS_IMPL_IHTMLCONTENT_USING_GENERIC_DOM_DATA(mInner)

  // nsITextContent
  NS_IMETHOD GetText(const PRUnichar*& aBaseResult, PRInt32& aLengthResult);
  NS_IMETHOD SetText(const PRUnichar* aBuffer, PRInt32 aLength,
                     PRBool aNotify);

protected:
  nsGenericDOMDataNode mInner;
};

nsresult
NS_NewTextNode(nsIHTMLContent** aInstancePtrResult)
{
  NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
  if (nsnull == aInstancePtrResult) {
    return NS_ERROR_NULL_POINTER;
  }
  nsTextNode* it;
  NS_NEWXPCOM(it, nsTextNode);
  if (nsnull == it) {
    return NS_ERROR_OUT_OF_MEMORY;
  }
  return it->QueryInterface(kIHTMLContentIID, (void **) aInstancePtrResult);
}

nsTextNode::nsTextNode()
{
  NS_INIT_REFCNT();
  mInner.Init(this);
}

nsTextNode::~nsTextNode()
{
}

NS_IMPL_ADDREF(nsTextNode)
NS_IMPL_RELEASE(nsTextNode)

NS_IMETHODIMP
nsTextNode::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
  NS_IMPL_DOM_DATA_QUERY_INTERFACE(aIID, aInstancePtr, this)
  if (aIID.Equals(kIDOMTextIID)) {
    nsIDOMText* tmp = this;
    *aInstancePtr = (void*) tmp;
    NS_ADDREF_THIS();
    return NS_OK;
  }
  if (aIID.Equals(kITextContentIID)) {
    nsITextContent* tmp = this;
    *aInstancePtr = (void*) tmp;
    NS_ADDREF_THIS();
    return NS_OK;
  }
  return NS_NOINTERFACE;
}

NS_IMETHODIMP
nsTextNode::GetNodeType(PRInt32* aNodeType)
{
  *aNodeType = (PRInt32)nsIDOMNode::TEXT;
  return NS_OK;
}

NS_IMETHODIMP
nsTextNode::Equals(nsIDOMNode* aNode, PRBool aDeep, PRBool* aReturn)
{
  // XXX not yet implemented
  *aReturn = PR_FALSE;
  return NS_OK;
}

NS_IMETHODIMP
nsTextNode::CloneNode(nsIDOMNode** aReturn)
{
  nsTextNode* it;
  NS_NEWXPCOM(it, nsTextNode);
  if (nsnull == it) {
    return NS_ERROR_OUT_OF_MEMORY;
  }
//XXX  mInner.CopyInnerTo(this, &it->mInner);
  return it->QueryInterface(kIDOMNodeIID, (void**) aReturn);
}

NS_IMETHODIMP
nsTextNode::List(FILE* out, PRInt32 aIndent) const
{
  NS_PRECONDITION(nsnull != mInner.mDocument, "bad content");

  PRInt32 index;
  for (index = aIndent; --index >= 0; ) fputs("  ", out);

  fprintf(out, "Text refcount=%d<", mRefCnt);

  nsAutoString tmp;
  mInner.ToCString(tmp, 0, mInner.mTextLength);
  fputs(tmp, out);

  fputs(">\n", out);
  return NS_OK;
}

NS_IMETHODIMP
nsTextNode::ToHTML(FILE* out) const
{
  nsAutoString tmp;
  tmp.Append(mInner.mText, mInner.mTextLength);
  fputs(tmp, out);
  return NS_OK;
}

NS_IMETHODIMP
nsTextNode::ToHTMLString(nsString& aBuf) const
{
  aBuf.Truncate(0);
  aBuf.Append(mInner.mText, mInner.mTextLength);
  return NS_OK;
}

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

//----------------------------------------------------------------------

// Implementation of the nsIDOMText interface

NS_IMETHODIMP    
nsTextNode::SplitText(PRUint32 aOffset, nsIDOMText** aReturn)
{
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP    
nsTextNode::JoinText(nsIDOMText* aNode1, nsIDOMText* aNode2,
                     nsIDOMText** aReturn)
{
  return NS_ERROR_NOT_IMPLEMENTED;
}

//----------------------------------------------------------------------

// Implementation of the nsITextContent interface

NS_IMETHODIMP
nsTextNode::GetText(const PRUnichar*& aBaseResult, PRInt32& aLengthResult)
{
  aBaseResult = mInner.mText;
  aLengthResult = mInner.mTextLength;
  return NS_OK;
}

// XXX probably should normalize the code to keep a \u0000 at the end
NS_IMETHODIMP
nsTextNode::SetText(const PRUnichar* aBuffer, PRInt32 aLength,
                    PRBool aNotify)
{
  NS_PRECONDITION((aLength >= 0) && (nsnull != aBuffer), "bad args");
  if (aLength < 0) {
    return NS_ERROR_ILLEGAL_VALUE;
  }
  if (nsnull == aBuffer) {
    return NS_ERROR_NULL_POINTER;
  }

  PRUnichar* nt = new PRUnichar[aLength+1];
  if (nsnull == nt) {
    return NS_ERROR_OUT_OF_MEMORY;
  }
  if (nsnull != mInner.mText) {
    delete [] mInner.mText;
  }
  nsCRT::memcpy(nt, aBuffer, sizeof(PRUnichar) * aLength);
  nt[aLength] = 0;
  mInner.mTextLength = aLength;
  mInner.mText = nt;

  // Trigger a reflow
  if (aNotify && (nsnull != mInner.mDocument)) {
    mInner.mDocument->ContentChanged(this, nsnull);
  }
  return NS_OK;
}