/* -*- 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 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):
 *   Pierre Phaneuf <pp@ludusdesign.com>
 *   Mats Palmgren <mats.palmgren@bredband.net>
 *
 * 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 "nsCOMPtr.h"
#include "nsReadableUtils.h"
#include "nsComboboxControlFrame.h"
#include "nsIDOMEventReceiver.h"
#include "nsFrameManager.h"
#include "nsFormControlFrame.h"
#include "nsGfxButtonControlFrame.h"
#include "nsHTMLAtoms.h"
#include "nsCSSAnonBoxes.h"
#include "nsHTMLParts.h"
#include "nsIFormControl.h"
#include "nsINameSpaceManager.h"
#include "nsLayoutAtoms.h"
#include "nsIDOMElement.h"
#include "nsIListControlFrame.h"
#include "nsIDOMHTMLCollection.h" 
#include "nsIDOMHTMLSelectElement.h" 
#include "nsIDOMHTMLOptionElement.h" 
#include "nsIDOMNSHTMLOptionCollectn.h" 
#include "nsIPresShell.h"
#include "nsIDeviceContext.h"
#include "nsIView.h"
#include "nsIScrollableView.h"
#include "nsEventDispatcher.h"
#include "nsIEventStateManager.h"
#include "nsIEventListenerManager.h"
#include "nsIDOMNode.h"
#include "nsIPrivateDOMEvent.h"
#include "nsISupportsArray.h"
#include "nsISelectControlFrame.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"
#include "nsIComponentManager.h"
#include "nsContentUtils.h"
#include "nsTextFragment.h"
#include "nsCSSFrameConstructor.h"
#include "nsIDocument.h"
#include "nsINodeInfo.h"
#include "nsIScrollableFrame.h"
#include "nsListControlFrame.h"
#include "nsContentCID.h"
#ifdef ACCESSIBILITY
#include "nsIAccessibilityService.h"
#endif
#include "nsIServiceManager.h"
#include "nsIDOMNode.h"
#include "nsGUIEvent.h"
#include "nsAutoPtr.h"
#include "nsStyleSet.h"
#include "nsNodeInfoManager.h"
#include "nsContentCreatorFunctions.h"
#include "nsLayoutUtils.h"
#include "nsDisplayList.h"

#ifdef MOZ_XUL
#include "nsIXULDocument.h" // Temporary fix for Bug 36558
#endif

#ifdef DO_NEW_REFLOW
#include "nsIFontMetrics.h"
#endif

NS_IMETHODIMP
nsComboboxControlFrame::RedisplayTextEvent::Run()
{
  if (mControlFrame)
    mControlFrame->HandleRedisplayTextEvent();
  return NS_OK;
}

class nsPresState;

#define FIX_FOR_BUG_53259

// Drop down list event management.
// The combo box uses the following strategy for managing the drop-down list.
// If the combo box or it's arrow button is clicked on the drop-down list is displayed
// If mouse exit's the combo box with the drop-down list displayed the drop-down list
// is asked to capture events
// The drop-down list will capture all events including mouse down and up and will always
// return with ListWasSelected method call regardless of whether an item in the list was
// actually selected.
// The ListWasSelected code will turn off mouse-capture for the drop-down list.
// The drop-down list does not explicitly set capture when it is in the drop-down mode.


//XXX: This is temporary. It simulates pseudo states by using a attribute selector on 

const PRInt32 kSizeNotSet = -1;

/**
 * Helper class that listens to the combo boxes button. If the button is pressed the 
 * combo box is toggled to open or close. this is used by Accessibility which presses
 * that button Programmatically.
 */
class nsComboButtonListener: public nsIDOMMouseListener
{
  public:

  NS_DECL_ISUPPORTS
  NS_IMETHOD HandleEvent(nsIDOMEvent* anEvent) { return PR_FALSE; }
  NS_IMETHOD MouseDown(nsIDOMEvent* aMouseEvent) { return PR_FALSE; }
  NS_IMETHOD MouseUp(nsIDOMEvent* aMouseEvent) { return PR_FALSE; }
  NS_IMETHOD MouseDblClick(nsIDOMEvent* aMouseEvent) { return PR_FALSE; }
  NS_IMETHOD MouseOver(nsIDOMEvent* aMouseEvent) { return PR_FALSE; }
  NS_IMETHOD MouseOut(nsIDOMEvent* aMouseEvent) { return PR_FALSE; }

  NS_IMETHOD MouseClick(nsIDOMEvent* aMouseEvent) 
  {
    mComboBox->ShowDropDown(!mComboBox->IsDroppedDown());
    return PR_FALSE; 
  }

  nsComboButtonListener(nsComboboxControlFrame* aCombobox) 
  { 
    mComboBox = aCombobox; 
  }

  virtual ~nsComboButtonListener() {}

  nsComboboxControlFrame* mComboBox;
};

NS_IMPL_ISUPPORTS1(nsComboButtonListener, nsIDOMMouseListener)

// static class data member for Bug 32920
nsComboboxControlFrame * nsComboboxControlFrame::mFocused = nsnull;

nsIFrame*
NS_NewComboboxControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, PRUint32 aStateFlags)
{
  nsComboboxControlFrame* it = new (aPresShell) nsComboboxControlFrame(aContext);

  if (it) {
    // set the state flags (if any are provided)
    it->AddStateBits(aStateFlags);
  }

  return it;
}

//-----------------------------------------------------------
// Reflow Debugging Macros
// These let us "see" how many reflow counts are happening
//-----------------------------------------------------------
#ifdef DO_REFLOW_COUNTER

#define MAX_REFLOW_CNT 1024
static PRInt32 gTotalReqs    = 0;;
static PRInt32 gTotalReflows = 0;;
static PRInt32 gReflowControlCntRQ[MAX_REFLOW_CNT];
static PRInt32 gReflowControlCnt[MAX_REFLOW_CNT];
static PRInt32 gReflowInx = -1;

#define REFLOW_COUNTER() \
  if (mReflowId > -1) \
    gReflowControlCnt[mReflowId]++;

#define REFLOW_COUNTER_REQUEST() \
  if (mReflowId > -1) \
    gReflowControlCntRQ[mReflowId]++;

#define REFLOW_COUNTER_DUMP(__desc) \
  if (mReflowId > -1) {\
    gTotalReqs    += gReflowControlCntRQ[mReflowId];\
    gTotalReflows += gReflowControlCnt[mReflowId];\
    printf("** Id:%5d %s RF: %d RQ: %d   %d/%d  %5.2f\n", \
           mReflowId, (__desc), \
           gReflowControlCnt[mReflowId], \
           gReflowControlCntRQ[mReflowId],\
           gTotalReflows, gTotalReqs, float(gTotalReflows)/float(gTotalReqs)*100.0f);\
  }

#define REFLOW_COUNTER_INIT() \
  if (gReflowInx < MAX_REFLOW_CNT) { \
    gReflowInx++; \
    mReflowId = gReflowInx; \
    gReflowControlCnt[mReflowId] = 0; \
    gReflowControlCntRQ[mReflowId] = 0; \
  } else { \
    mReflowId = -1; \
  }

// reflow messages
#define REFLOW_DEBUG_MSG(_msg1) printf((_msg1))
#define REFLOW_DEBUG_MSG2(_msg1, _msg2) printf((_msg1), (_msg2