/* ***** 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 mozilla.org code.
 *
 * The Initial Developer of the Original Code Christopher Blizzard
 * <blizzard@mozilla.org>.  Portions created by the Initial Developer
 * are Copyright (C) 2001 the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either 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 "mozdrawingarea.h"

/* init methods */
static void moz_drawingarea_class_init          (MozDrawingareaClass *klass);
static void moz_drawingarea_init                (MozDrawingarea *drawingarea);

/* static methods */
static void moz_drawingarea_create_windows      (MozDrawingarea *drawingarea,
						 GdkWindow *parent,
						 GtkWidget *widget);

static void moz_drawingarea_finalize            (GObject *object);

static GObjectClass *parent_class = NULL;

GtkType
moz_drawingarea_get_type(void)
{
  static GtkType moz_drawingarea_type = 0;

  if (!moz_drawingarea_type)
    {
      static GTypeInfo moz_drawingarea_info = {
	sizeof(MozDrawingareaClass), /* class size */
	NULL, /* base_init */
	NULL, /* base_finalize */
	(GClassInitFunc) moz_drawingarea_class_init, /* class_init */
	NULL, /* class_destroy */
	NULL, /* class_data */
	sizeof(MozDrawingarea), /* instance_size */
	0, /* n_preallocs */
	(GInstanceInitFunc) moz_drawingarea_init, /* instance_init */
	NULL, /* value_table */
      };

      moz_drawingarea_type = g_type_register_static (G_TYPE_OBJECT,
						     "MozDrawingarea",
						     &moz_drawingarea_info, 0);
    }

  return moz_drawingarea_type;
}

MozDrawingarea *
moz_drawingarea_new (MozDrawingarea *parent, MozContainer *widget_parent)
{
  MozDrawingarea *drawingarea;

  drawingarea = g_object_new(MOZ_DRAWINGAREA_TYPE, NULL);

  drawingarea->parent = parent;

  if (!parent)
    moz_drawingarea_create_windows(drawingarea,
				   GTK_WIDGET(widget_parent)->window,
				   GTK_WIDGET(widget_parent));
  else
    moz_drawingarea_create_windows(drawingarea,
				   parent->inner_window, 
				   GTK_WIDGET(widget_parent));

  return drawingarea;
}

void
moz_drawingarea_class_init (MozDrawingareaClass *klass)
{
  GObjectClass *object_class = G_OBJECT_CLASS (klass);

  object_class->finalize = moz_drawingarea_finalize;

  parent_class = g_type_class_peek_parent(klass);
}

void
moz_drawingarea_init (MozDrawingarea *drawingarea)
{
  
}

void
moz_drawingarea_create_windows (MozDrawingarea *drawingarea, GdkWindow *parent,
				GtkWidget *widget)
{
  GdkWindowAttr attributes;
  gint          attributes_mask = 0;
  
  /* create the clipping window */
  attributes.event_mask = 0;
  attributes.x = 0;
  attributes.y = 0;
  attributes.width = 1;
  attributes.height = 1;
  attributes.wclass = GDK_INPUT_OUTPUT;
  attributes.visual = gtk_widget_get_visual (widget);
  attributes.colormap = gtk_widget_get_colormap (widget);
  attributes.window_type = GDK_WINDOW_CHILD;

  attributes_mask |= GDK_WA_VISUAL | GDK_WA_COLORMAP |
    GDK_WA_X | GDK_WA_Y;

  drawingarea->clip_window = gdk_window_new (parent, &attributes,
					     attributes_mask);
  gdk_window_set_user_data(drawingarea->clip_window, widget);

  /* set the default pixmap to None so that you don't end up with the
     gtk default which is BlackPixel. */
  gdk_window_set_back_pixmap(drawingarea->clip_window, NULL, FALSE);

  attributes.event_mask = (GDK_EXPOSURE_MASK | GDK_STRUCTURE_MASK |
			   GDK_VISIBILITY_NOTIFY_MASK |
			   GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK |
			   GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
			   GDK_POINTER_MOTION_MASK);
  /* create the inner window */
  drawingarea->inner_window = gdk_window_new (drawingarea->clip_window,
					      &attributes, attributes_mask);
  gdk_window_set_user_data(drawingarea->inner_window, widget);

  /* set the default pixmap to None so that you don't end up with the
     gtk default which is BlackPixel. */
  gdk_window_set_back_pixmap(drawingarea->inner_window, NULL, FALSE);
}

void
moz_drawingarea_finalize (GObject *object)
{
  MozDrawingarea *drawingarea;
  
  g_return_if_fail(IS_MOZ_DRAWINGAREA(object));

  drawingarea = MOZ_DRAWINGAREA(object);

  gdk_window_destroy(drawingarea->inner_window);
  gdk_window_destroy(drawingarea->clip_window);

  (* parent_class->finalize) (object);
}

void
moz_drawingarea_move (MozDrawingarea *drawingarea,
		      gint x, gint y)
{
  gdk_window_move(drawingarea->clip_window, x, y);
}

void
moz_drawingarea_resize (MozDrawingarea *drawingarea,
			gint width, gint height)
{
  gdk_window_resize(drawingarea->clip_window, width, height);
  gdk_window_resize(drawingarea->inner_window, width, height);
}

void
moz_drawingarea_move_resize (MozDrawingarea *drawingarea,
			     gint x, gint y, gint width, gint height)
{
  gdk_window_resize(drawingarea->inner_window, width, height);
  gdk_window_move_resize(drawingarea->clip_window, x, y, width, height);
}

void
moz_drawingarea_set_visibility (MozDrawingarea *drawingarea,
				gboolean visibility)
{
  if (visibility)
    {
      gdk_window_show(drawingarea->inner_window);
      gdk_window_show(drawingarea->clip_window);
    }
  else
    {
      gdk_window_hide(drawingarea->clip_window);
      gdk_window_hide(drawingarea->inner_window);
    }
}

void
moz_drawingarea_scroll (MozDrawingarea *drawingarea,
			gint x, gint y)
{
  gdk_window_scroll(drawingarea->inner_window, x, y);
}