/* -*- Mode: C++; tab-width: 2; 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 the Mozilla browser.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Lars Knoll <knoll@kde.org>
 *   Zack Rusin <zack@kde.org>
 *   Tim Hill (tim@prismelite.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
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * 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 ***** */

#include <QStyle>
#include <QPalette>

#include "nsITheme.h"
#include "nsCOMPtr.h"
#include "nsIAtom.h"
#include "nsNativeTheme.h"
#include "nsIDeviceContext.h"

class QComboBox;
class QStyleOptionButton;
class QStyleOptionFrameV2;
class QStyleOptionComboBox;
class QRect;
class nsIFrame;

class nsNativeThemeQt : private nsNativeTheme,
                        public nsITheme
{
public:
  NS_DECL_ISUPPORTS

  // The nsITheme interface.
  NS_IMETHOD DrawWidgetBackground(nsIRenderingContext* aContext,
                                  nsIFrame* aFrame,
                                  PRUint8 aWidgetType,
                                  const nsRect& aRect,
                                  const nsRect& aClipRect);

  NS_IMETHOD GetWidgetBorder(nsIDeviceContext* aContext,
                             nsIFrame* aFrame,
                             PRUint8 aWidgetType,
                             nsMargin* aResult);

  NS_IMETHOD GetMinimumWidgetSize(nsIRenderingContext* aContext, nsIFrame* aFrame,
                                  PRUint8 aWidgetType,
                                  nsSize* aResult,
                                  PRBool* aIsOverridable);

  NS_IMETHOD WidgetStateChanged(nsIFrame* aFrame, PRUint8 aWidgetType,
                                nsIAtom* aAttribute, PRBool* aShouldRepaint);

  NS_IMETHOD ThemeChanged();

  PRBool ThemeSupportsWidget(nsPresContext* aPresContext,
                             nsIFrame* aFrame,
                             PRUint8 aWidgetType);

  PRBool WidgetIsContainer(PRUint8 aWidgetType);

  virtual NS_HIDDEN_(PRBool) GetWidgetPadding(nsIDeviceContext* aContext,
                                              nsIFrame* aFrame,
                                              PRUint8 aWidgetType,
                                              nsMargin* aResult);

  NS_IMETHOD_(PRBool) ThemeDrawsFocusForWidget(nsPresContext* aPresContext,
                                               nsIFrame* aFrame, PRUint8 aWidgetType);

  PRBool ThemeNeedsComboboxDropmarker();

  virtual nsTransparencyMode GetWidgetTransparency(PRUint8 aWidgetType);

  nsNativeThemeQt();
  virtual ~nsNativeThemeQt();

private:

  inline PRInt32 GetAppUnitsPerDevPixel(nsIRenderingContext* aContext){
    nsCOMPtr<nsIDeviceContext> dctx = nsnull;
    aContext->GetDeviceContext(*getter_AddRefs(dctx));
    return dctx->AppUnitsPerDevPixel();
  }

  void InitButtonStyle(PRUint8 widgetType,
                       nsIFrame* aFrame,
                       QRect rect,
                       QStyleOptionButton &opt);

  void InitPlainStyle(PRUint8 aWidgetType,
                      nsIFrame* aFrame,
                      QRect rect,
                      QStyleOption &opt,
                      QStyle::State extraFlags = QStyle::State_None);

  void InitComboStyle(PRUint8 aWidgetType,
                      nsIFrame* aFrame,
                      QRect rect,
                      QStyleOptionComboBox &opt);

private:

  PRInt32 mFrameWidth;

  QPalette mNoBackgroundPalette;
};

