/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla 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/MPL/
 *
 * 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.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Masayuki Nakano <masayuki@d-toybox.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
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 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef nsEditorEventListener_h__
#define nsEditorEventListener_h__

#include "nsCOMPtr.h"

#include "nsIDOMEvent.h"
#include "nsIDOMEventListener.h"

#include "nsCaret.h"

// X.h defines KeyPress
#ifdef KeyPress
#undef KeyPress
#endif

#ifdef XP_WIN
// On Windows, we support switching the text direction by pressing Ctrl+Shift
#define HANDLE_NATIVE_TEXT_DIRECTION_SWITCH
#endif

class nsEditor;
class nsIDOMDragEvent;

class nsEditorEventListener : public nsIDOMEventListener
{
public:
  nsEditorEventListener();
  virtual ~nsEditorEventListener();

  virtual nsresult Connect(nsEditor* aEditor);

  void Disconnect();

  NS_DECL_ISUPPORTS
  NS_DECL_NSIDOMEVENTLISTENER

#ifdef HANDLE_NATIVE_TEXT_DIRECTION_SWITCH
  NS_IMETHOD KeyDown(nsIDOMEvent* aKeyEvent);
  NS_IMETHOD KeyUp(nsIDOMEvent* aKeyEvent);
#endif
  NS_IMETHOD KeyPress(nsIDOMEvent* aKeyEvent);
  NS_IMETHOD HandleText(nsIDOMEvent* aTextEvent);
  NS_IMETHOD HandleStartComposition(nsIDOMEvent* aCompositionEvent);
  NS_IMETHOD HandleEndComposition(nsIDOMEvent* aCompositionEvent);
  NS_IMETHOD MouseDown(nsIDOMEvent* aMouseEvent);
  NS_IMETHOD MouseUp(nsIDOMEvent* aMouseEvent) { return NS_OK; }
  NS_IMETHOD MouseClick(nsIDOMEvent* aMouseEvent);
  NS_IMETHOD Focus(nsIDOMEvent* aEvent);
  NS_IMETHOD Blur(nsIDOMEvent* aEvent);

protected:
  nsresult InstallToEditor();
  void UninstallFromEditor();

  bool CanDrop(nsIDOMDragEvent* aEvent);
  nsresult DragEnter(nsIDOMDragEvent* aDragEvent);
  nsresult DragOver(nsIDOMDragEvent* aDragEvent);
  nsresult DragExit(nsIDOMDragEvent* aDragEvent);
  nsresult Drop(nsIDOMDragEvent* aDragEvent);
  nsresult DragGesture(nsIDOMDragEvent* aDragEvent);
  void CleanupDragDropCaret();
  already_AddRefed<nsIPresShell> GetPresShell();

protected:
  nsEditor* mEditor; // weak
  nsRefPtr<nsCaret> mCaret;
  bool mCommitText;
  bool mInTransaction;
#ifdef HANDLE_NATIVE_TEXT_DIRECTION_SWITCH
  bool mHaveBidiKeyboards;
  bool mShouldSwitchTextDirection;
  bool mSwitchToRTL;
#endif
};

#endif // nsEditorEventListener_h__
