gecko-dev/editor/base/nsEditorFactory.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 "NPL"); you may not use this file except in
 * compliance with the NPL.  You may obtain a copy of the NPL at
 * http://wwwt.mozilla.org/NPL/
 *
 * Software distributed under the NPL is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
 * for the specific language governing rights and limitations under the
 * NPL.
 *
 * The Initial Developer of this code under the NPL is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
 * Reserved.
 */

#include "nsCOMPtr.h"

#include "nsEditorFactory.h"
#include "nsIEditor.h"
#include "nsIHTMLEditor.h"

#include "nsEditorShell.h"
#include "nsEditorShell.h"
#include "nsEditorShellFactory.h"

#ifdef ENABLE_EDITOR_API_LOG
#include "nsHTMLEditorLog.h"
#endif // ENABLE_EDITOR_API_LOG
#include "nsHTMLEditor.h"
#include "nsEditor.h"

#include "nsEditorCID.h"

#include "nsIComponentManager.h"
#include "nsIServiceManager.h"

static NS_DEFINE_IID(kHTMLEditorCID,        NS_HTMLEDITOR_CID);


nsresult
GetEditorFactory(nsIFactory **aFactory, const nsCID & aClass)
{
  
  // XXX Note static which never gets released, even on library unload.
  // XXX Was an nsCOMPtr but that caused a crash on exit,
  // XXX http://bugzilla.mozilla.org/show_bug.cgi?id=7938
  PR_EnterMonitor(GetEditorMonitor());

  nsEditorFactory *factory = new nsEditorFactory(aClass);
  if (!factory)
    return NS_ERROR_OUT_OF_MEMORY;
  nsCOMPtr<nsIFactory> pNSIFactory = do_QueryInterface(factory);
  if (!pNSIFactory)
    return NS_ERROR_NO_INTERFACE;

  nsresult result = pNSIFactory->QueryInterface(nsIFactory::GetIID(),
                                                (void **)aFactory);
  PR_ExitMonitor(GetEditorMonitor());
  return result;
}

nsEditorFactory::nsEditorFactory(const nsCID &aClass)
: mCID(aClass)
{
  NS_INIT_REFCNT();
}

nsEditorFactory::~nsEditorFactory()
{
  //nsComponentManager::UnregisterFactory(mCID, (nsIFactory *)this); //we are out of ref counts anyway
}

////////////////////////////////////////////////////////////////////////////
// from nsISupports 

NS_METHOD
nsEditorFactory::QueryInterface(const nsIID& aIID, void** aInstancePtr) 
{
  if (nsnull == aInstancePtr) {
    NS_NOTREACHED("!nsEditor");
    return NS_ERROR_NULL_POINTER; 
  } 
  if (aIID.Equals(nsIFactory::GetIID()) ||
    aIID.Equals(nsCOMTypeInfo<nsISupports>::GetIID())) {
    *aInstancePtr = (void*) this; 
    AddRef();  
    return NS_OK; 
  }
  return NS_NOINTERFACE; 
}

NS_IMPL_ADDREF(nsEditorFactory)
NS_IMPL_RELEASE(nsEditorFactory)


////////////////////////////////////////////////////////////////////////////
// from nsIFactory:

NS_METHOD
nsEditorFactory::CreateInstance(nsISupports *aOuter, REFNSIID aIID, void **aResult)
{
  *aResult  = nsnull;
  nsISupports *obj = nsnull;
  if (!aResult)
    return NS_ERROR_NULL_POINTER;
  if (aOuter && !aIID.Equals(nsCOMTypeInfo<nsISupports>::GetIID()))
    return NS_NOINTERFACE;   // XXX right error?


/* nsEditor is pure virtual
  if (mCID.Equals(kEditorCID))
    obj = (nsISupports *)(nsIEditor*)new nsEditor();
*/

  if (mCID.Equals(kHTMLEditorCID))
  {
    //Need to cast to interface first to avoid "ambiguous conversion..." error
    //  because of multiple nsISupports in the class hierarchy

#ifdef ENABLE_EDITOR_API_LOG
    obj = (nsISupports *)(nsIHTMLEditor*)new nsHTMLEditorLog();
#else
    obj = (nsISupports *)(nsIHTMLEditor*)new nsHTMLEditor();
#endif // ENABLE_EDITOR_API_LOG
  }

  if (obj && NS_FAILED(obj->QueryInterface(aIID, (void**)aResult)) ) 
  {
    delete obj;
    return NS_NOINTERFACE;
  }
  return NS_OK;
}



NS_METHOD
nsEditorFactory::LockFactory(PRBool aLock)
{
  return NS_OK;
}


//if more than one person asks for the monitor at the same time for the FIRST time, we are screwed
PRMonitor *GetEditorMonitor()
{
  static PRMonitor *ns_editlock = nsnull;
  if (nsnull == ns_editlock)
  {
    ns_editlock = (PRMonitor *)1; //how long will the next line take?  lets cut down on the chance of reentrancy
    ns_editlock = PR_NewMonitor();
  }
  else if ((PRMonitor *)1 == ns_editlock)
    return GetEditorMonitor();
  return ns_editlock;
}