/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * 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://www.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 "nsDragService.h"
#include "nsITransferable.h"
#include "nsIServiceManager.h"

#include "nsWidgetsCID.h"

static NS_DEFINE_IID(kIDragServiceIID,   NS_IDRAGSERVICE_IID);
static NS_DEFINE_CID(kCDragServiceCID,   NS_DRAGSERVICE_CID);

// The class statics:
//GtkWidget* nsDragService::sWidget = 0;

NS_IMPL_ADDREF_INHERITED(nsDragService, nsBaseDragService)
NS_IMPL_RELEASE_INHERITED(nsDragService, nsBaseDragService)

//-------------------------------------------------------------------------
// static variables
//-------------------------------------------------------------------------
  //static PRBool gHaveDrag = PR_FALSE;

//-------------------------------------------------------------------------
//
// DragService constructor
//
//-------------------------------------------------------------------------
nsDragService::nsDragService()
{
    NS_INIT_REFCNT();
}

//-------------------------------------------------------------------------
//
// DragService destructor
//
//-------------------------------------------------------------------------
nsDragService::~nsDragService()
{
}

/**
 * @param aIID The name of the class implementing the method
 * @param _classiiddef The name of the #define symbol that defines the IID
 * for the class (e.g. NS_ISUPPORTS_IID)
 * 
*/ 
nsresult nsDragService::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{

    if (NULL == aInstancePtr) 
    {
        return NS_ERROR_NULL_POINTER;
    }

    nsresult rv = NS_NOINTERFACE;

    if (aIID.Equals(nsIDragService::GetIID())) 
    {
        *aInstancePtr = (void*) ((nsIDragService*)this);
        NS_ADDREF_THIS();
        return NS_OK;
    }

return rv;
}

//---------------------------------------------------------
NS_IMETHODIMP nsDragService::StartDragSession(nsITransferable * aTransferable,
                                              PRUint32 aActionType)

{
    return NS_OK;
}

#if 0
//-------------------------------------------------------------------------
NS_IMETHODIMP nsDragService::GetData(nsITransferable * aTransferable,
                                     PRUint32 aItemIndex)
{
    return NS_ERROR_FAILURE;
}

//-------------------------------------------------------------------------
void nsDragService::SetTopLevelWidget(GtkWidget* w)
{
    printf("  nsDragService::SetTopLevelWidget\n");
  
    // Don't set up any more event handlers if we're being called twice
    // for the same toplevel widget
    if (sWidget == w)
        return;

    sWidget = w;

    // Get the DragService from the service manager.
    nsresult rv;
    NS_WITH_SERVICE(nsIDragService, dragService, kCDragServiceCID, &rv);

    if (NS_FAILED(rv)) 
    {
        return;
    }

#if 0
    gtk_signal_connect (GTK_OBJECT (pixmap), "drag_leave",
                        GTK_SIGNAL_FUNC (nsDragService::DragLeave), dragService);

    gtk_signal_connect (GTK_OBJECT (pixmap), "drag_motion",
                        GTK_SIGNAL_FUNC (nsDragService::DragMotion), dragService);

    gtk_signal_connect (GTK_OBJECT (pixmap), "drag_drop",
                        GTK_SIGNAL_FUNC (nsDragService::DragDrop), dragService);

    gtk_signal_connect (GTK_OBJECT (pixmap), "drag_data_received",
                        GTK_SIGNAL_FUNC (nsDragService::DragDataReceived), dragService);
#endif

    // We're done with our reference to the dragService.
    //NS_IF_RELEASE(dragService);
}

//-------------------------------------------------------------------------
void  
nsDragService::DragLeave(GtkWidget	       *widget,
			                   GdkDragContext   *context,
                         guint             time)
{
    g_print("leave\n");
    //gHaveDrag = PR_FALSE;
}

//-------------------------------------------------------------------------
PRBool
nsDragService::DragMotion(GtkWidget	       *widget,
			                    GdkDragContext   *context,
			                    gint              x,
			                    gint              y,
			                    guint             time)
{
    g_print("drag motion\n");
    GtkWidget *source_widget;

#if 0
    if (!gHaveDrag) 
    {
        gHaveDrag = PR_TRUE;
    }
#endif

    source_widget = gtk_drag_get_source_widget (context);
    g_print("motion, source %s\n", source_widget ?
	          gtk_type_name (GTK_OBJECT (source_widget)->klass->type) :
	          "unknown");

    gdk_drag_status (context, context->suggested_action, time);
  
    return PR_TRUE;
}

//-------------------------------------------------------------------------
PRBool
nsDragService::DragDrop(GtkWidget	       *widget,
			                  GdkDragContext   *context,
			                  gint              x,
			                  gint              y,
			                  guint             time)
{
    g_print("drop\n");
    //gHaveDrag = PR_FALSE;

    if (context->targets)
    {
        gtk_drag_get_data (widget, context, 
                           GPOINTER_TO_INT (context->targets->data), 
                           time);
        return PR_TRUE;
    }
  
    return PR_FALSE;
}

//-------------------------------------------------------------------------
void  
nsDragService::DragDataReceived(GtkWidget          *widget,
                                GdkDragContext     *context,
                                gint                x,
                                gint                y,
                                GtkSelectionData   *data,
                                guint               info,
                                guint               time)
{
    if ((data->length >= 0) && (data->format == 8)) {
        g_print ("Received \"%s\"\n", (gchar *)data->data);
        gtk_drag_finish (context, PR_TRUE, PR_FALSE, time);
        return;
    }
  
    gtk_drag_finish (context, PR_FALSE, PR_FALSE, time);
}
  
//-------------------------------------------------------------------------
void  
nsDragService::DragDataGet(GtkWidget          *widget,
		                       GdkDragContext     *context,
		                       GtkSelectionData   *selection_data,
		                       guint               info,
		                       guint               time,
		                       gpointer            data)
{
    gtk_selection_data_set (selection_data,
                            selection_data->target,
                            8, (guchar *)"I'm Data!", 9);
}

//-------------------------------------------------------------------------
void  
nsDragService::DragDataDelete(GtkWidget          *widget,
			                        GdkDragContext     *context,
			                        gpointer            data)
{
    g_print ("Delete the data!\n");
}
#endif