/* GTK - The GIMP Toolkit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/*
 * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
 * file for a list of people on the GTK+ Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 
 */

#include "config.h"

#include <math.h>
#include <string.h>

#include "gtkcontainer.h"
#include "gtkimageprivate.h"
#include "gtkiconfactory.h"
#include "gtkstock.h"
#include "gtkicontheme.h"
#include "gtksizerequest.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "gtktypebuiltins.h"

#include "a11y/gtkimageaccessible.h"

/**
 * SECTION:gtkimage
 * @Short_description: A widget displaying an image
 * @Title: GtkImage
 * @See_also:#GdkPixbuf
 *
 * The #GtkImage widget displays an image. Various kinds of object
 * can be displayed as an image; most typically, you would load a
 * #GdkPixbuf ("pixel buffer") from a file, and then display that.
 * There's a convenience function to do this, gtk_image_new_from_file(),
 * used as follows:
 * <informalexample><programlisting>
 *   GtkWidget *image;
 *   image = gtk_image_new_from_file ("myfile.png");
 * </programlisting></informalexample>
 * If the file isn't loaded successfully, the image will contain a
 * "broken image" icon similar to that used in many web browsers.
 * If you want to handle errors in loading the file yourself,
 * for example by displaying an error message, then load the image with
 * gdk_pixbuf_new_from_file(), then create the #GtkImage with
 * gtk_image_new_from_pixbuf().
 *
 * The image file may contain an animation, if so the #GtkImage will
 * display an animation (#GdkPixbufAnimation) instead of a static image.
 *
 * #GtkImage is a subclass of #GtkMisc, which implies that you can
 * align it (center, left, right) and add padding to it, using
 * #GtkMisc methods.
 *
 * #GtkImage is a "no window" widget (has no #GdkWindow of its own),
 * so by default does not receive events. If you want to receive events
 * on the image, such as button clicks, place the image inside a
 * #GtkEventBox, then connect to the event signals on the event box.
 * <example>
 * <title>Handling button press events on a
 * <structname>GtkImage</structname>.</title>
 * <programlisting>
 *   static gboolean
 *   button_press_callback (GtkWidget      *event_box,
 *                          GdkEventButton *event,
 *                          gpointer        data)
 *   {
 *     g_print ("Event box clicked at coordinates &percnt;f,&percnt;f\n",
 *              event->x, event->y);
 *
 *     /<!---->* Returning TRUE means we handled the event, so the signal
 *      * emission should be stopped (don't call any further
 *      * callbacks that may be connected). Return FALSE
 *      * to continue invoking callbacks.
 *      *<!---->/
 *     return TRUE;
 *   }
 *
 *   static GtkWidget*
 *   create_image (void)
 *   {
 *     GtkWidget *image;
 *     GtkWidget *event_box;
 *
 *     image = gtk_image_new_from_file ("myfile.png");
 *
 *     event_box = gtk_event_box_new (<!-- -->);
 *
 *     gtk_container_add (GTK_CONTAINER (event_box), image);
 *
 *     g_signal_connect (G_OBJECT (event_box),
 *                       "button_press_event",
 *                       G_CALLBACK (button_press_callback),
 *                       image);
 *
 *     return image;
 *   }
 * </programlisting>
 * </example>
 *
 * When handling events on the event box, keep in mind that coordinates
 * in the image may be different from event box coordinates due to
 * the alignment and padding settings on the image (see #GtkMisc).
 * The simplest way to solve this is to set the alignment to 0.0
 * (left/top), and set the padding to zero. Then the origin of
 * the image will be the same as the origin of the event box.
 *
 * Sometimes an application will want to avoid depending on external data
 * files, such as image files. GTK+ comes with a program to avoid this,
 * called <application>gdk-pixbuf-csource</application>. This program
 * allows you to convert an image into a C variable declaration, which
 * can then be loaded into a #GdkPixbuf using
 * gdk_pixbuf_new_from_inline().
 */


struct _GtkImagePrivate
{
  GtkIconSize           icon_size;      /* Only used with GTK_IMAGE_STOCK, GTK_IMAGE_ICON_SET, GTK_IMAGE_ICON_NAME */
  GtkImageType          storage_type;

  union
  {
    GtkImagePixbufData     pixbuf;
    GtkImageStockData      stock;
    GtkImageIconSetData    icon_set;
    GtkImageAnimationData  anim;
    GtkImageIconNameData   name;
    GtkImageGIconData      gicon;
  } data;

  gchar                *filename;       /* Only used with GTK_IMAGE_ANIMATION, GTK_IMAGE_PIXBUF */
  gint                  last_rendered_state;  /* a GtkStateFlags, with -1 meaning an invalid state,
                                               * only used with GTK_IMAGE_GICON, GTK_IMAGE_ICON_NAME */
  gint                  pixel_size;
  gint                  required_width;
  gint                  required_height;
  guint                 need_calc_size : 1;
  guint                 use_fallback   : 1;
};


#define DEFAULT_ICON_SIZE GTK_ICON_SIZE_BUTTON
static gint gtk_image_draw                 (GtkWidget    *widget,
                                            cairo_t      *cr);
static void gtk_image_unmap                (GtkWidget    *widget);
static void gtk_image_unrealize            (GtkWidget    *widget);
static void gtk_image_get_preferred_width  (GtkWidget    *widget,
                                            gint         *minimum,
                                            gint         *natural);
static void gtk_image_get_preferred_height (GtkWidget    *widget,
                                            gint         *minimum,
                                            gint         *natural);

static void gtk_image_style_updated        (GtkWidget    *widget);
static void gtk_image_screen_changed       (GtkWidget    *widget,
                                            GdkScreen    *prev_screen);
static void gtk_image_destroy              (GtkWidget    *widget);
static void gtk_image_reset                (GtkImage     *image);
static void gtk_image_calc_size            (GtkImage     *image);

static void gtk_image_update_size          (GtkImage     *image,
                                            gint          image_width,
                                            gint          image_height);

static void gtk_image_set_property         (GObject      *object,
                                            guint         prop_id,
                                            const GValue *value,
                                            GParamSpec   *pspec);
static void gtk_image_get_property         (GObject      *object,
                                            guint         prop_id,
                                            GValue       *value,
                                            GParamSpec   *pspec);

static void icon_theme_changed             (GtkImage     *image);

enum
{
  PROP_0,
  PROP_PIXBUF,
  PROP_FILE,
  PROP_STOCK,
  PROP_ICON_SET,
  PROP_ICON_SIZE,
  PROP_PIXEL_SIZE,
  PROP_PIXBUF_ANIMATION,
  PROP_ICON_NAME,
  PROP_STORAGE_TYPE,
  PROP_GICON,
  PROP_USE_FALLBACK
};

G_DEFINE_TYPE (GtkImage, gtk_image, GTK_TYPE_MISC)

static void
gtk_image_class_init (GtkImageClass *class)
{
  GObjectClass *gobject_class;
  GtkWidgetClass *widget_class;

  gobject_class = G_OBJECT_CLASS (class);
  
  gobject_class->set_property = gtk_image_set_property;
  gobject_class->get_property = gtk_image_get_property;

  widget_class = GTK_WIDGET_CLASS (class);
  widget_class->draw = gtk_image_draw;
  widget_class->destroy = gtk_image_destroy;
  widget_class->get_preferred_width = gtk_image_get_preferred_width;
  widget_class->get_preferred_height = gtk_image_get_preferred_height;
  widget_class->unmap = gtk_image_unmap;
  widget_class->unrealize = gtk_image_unrealize;
  widget_class->style_updated = gtk_image_style_updated;
  widget_class->screen_changed = gtk_image_screen_changed;
  
  g_object_class_install_property (gobject_class,
                                   PROP_PIXBUF,
                                   g_param_spec_object ("pixbuf",
                                                        P_("Pixbuf"),
                                                        P_("A GdkPixbuf to display"),
                                                        GDK_TYPE_PIXBUF,
                                                        GTK_PARAM_READWRITE));

  g_object_class_install_property (gobject_class,
                                   PROP_FILE,
                                   g_param_spec_string ("file",
                                                        P_("Filename"),
                                                        P_("Filename to load and display"),
                                                        NULL,
                                                        GTK_PARAM_READWRITE));
  

  g_object_class_install_property (gobject_class,
                                   PROP_STOCK,
                                   g_param_spec_string ("stock",
                                                        P_("Stock ID"),
                                                        P_("Stock ID for a stock image to display"),
                                                        NULL,
                                                        GTK_PARAM_READWRITE));
  
  g_object_class_install_property (gobject_class,
                                   PROP_ICON_SET,
                                   g_param_spec_boxed ("icon-set",
                                                       P_("Icon set"),
                                                       P_("Icon set to display"),
                                                       GTK_TYPE_ICON_SET,
                                                       GTK_PARAM_READWRITE));
  
  g_object_class_install_property (gobject_class,
                                   PROP_ICON_SIZE,
                                   g_param_spec_int ("icon-size",
                                                     P_("Icon size"),
                                                     P_("Symbolic size to use for stock icon, icon set or named icon"),
                                                     0, G_MAXINT,
                                                     DEFAULT_ICON_SIZE,
                                                     GTK_PARAM_READWRITE));
  /**
   * GtkImage:pixel-size:
   *
   * The "pixel-size" property can be used to specify a fixed size
   * overriding the #GtkImage:icon-size property for images of type 
   * %GTK_IMAGE_ICON_NAME. 
   *
   * Since: 2.6
   */
  g_object_class_install_property (gobject_class,
				   PROP_PIXEL_SIZE,
				   g_param_spec_int ("pixel-size",
						     P_("Pixel size"),
						     P_("Pixel size to use for named icon"),
						     -1, G_MAXINT,
						     -1,
						     GTK_PARAM_READWRITE));
  
  g_object_class_install_property (gobject_class,
                                   PROP_PIXBUF_ANIMATION,
                                   g_param_spec_object ("pixbuf-animation",
                                                        P_("Animation"),
                                                        P_("GdkPixbufAnimation to display"),
                                                        GDK_TYPE_PIXBUF_ANIMATION,
                                                        GTK_PARAM_READWRITE));

  /**
   * GtkImage:icon-name:
   *
   * The name of the icon in the icon theme. If the icon theme is
   * changed, the image will be updated automatically.
   *
   * Since: 2.6
   */
  g_object_class_install_property (gobject_class,
                                   PROP_ICON_NAME,
                                   g_param_spec_string ("icon-name",
                                                        P_("Icon Name"),
                                                        P_("The name of the icon from the icon theme"),
                                                        NULL,
                                                        GTK_PARAM_READWRITE));
  
  /**
   * GtkImage:gicon:
   *
   * The GIcon displayed in the GtkImage. For themed icons,
   * If the icon theme is changed, the image will be updated
   * automatically.
   *
   * Since: 2.14
   */
  g_object_class_install_property (gobject_class,
                                   PROP_GICON,
                                   g_param_spec_object ("gicon",
                                                        P_("Icon"),
                                                        P_("The GIcon being displayed"),
                                                        G_TYPE_ICON,
                                                        GTK_PARAM_READWRITE));
  
  g_object_class_install_property (gobject_class,
                                   PROP_STORAGE_TYPE,
                                   g_param_spec_enum ("storage-type",
                                                      P_("Storage type"),
                                                      P_("The representation being used for image data"),
                                                      GTK_TYPE_IMAGE_TYPE,
                                                      GTK_IMAGE_EMPTY,
                                                      GTK_PARAM_READABLE));

  /**
   * GtkImage:use-fallback:
   *
   * Whether the icon displayed in the GtkImage will use
   * standard icon names fallback. The value of this property
   * is only relevant for images of type %GTK_IMAGE_ICON_NAME
   * and %GTK_IMAGE_GICON.
   *
   * Since: 3.0
   */
  g_object_class_install_property (gobject_class,
                                   PROP_USE_FALLBACK,
                                   g_param_spec_boolean ("use-fallback",
                                                         P_("Use Fallback"),
                                                         P_("Whether to use icon names fallback"),
                                                         FALSE,
                                                         GTK_PARAM_READWRITE));

  g_type_class_add_private (class, sizeof (GtkImagePrivate));

  gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_IMAGE_ACCESSIBLE);
}

static void
gtk_image_init (GtkImage *image)
{
  GtkImagePrivate *priv;

  image->priv = G_TYPE_INSTANCE_GET_PRIVATE (image,
                                             GTK_TYPE_IMAGE,
                                             GtkImagePrivate);
  priv = image->priv;

  gtk_widget_set_has_window (GTK_WIDGET (image), FALSE);

  priv->storage_type = GTK_IMAGE_EMPTY;
  priv->icon_size = DEFAULT_ICON_SIZE;

  priv->pixel_size = -1;

  priv->filename = NULL;
}

static void
gtk_image_destroy (GtkWidget *widget)
{
  GtkImage *image = GTK_IMAGE (widget);

  gtk_image_reset (image);

  GTK_WIDGET_CLASS (gtk_image_parent_class)->destroy (widget);
}

static void 
gtk_image_set_property (GObject      *object,
			guint         prop_id,
			const GValue *value,
			GParamSpec   *pspec)
{
  GtkImage *image = GTK_IMAGE (object);
  GtkImagePrivate *priv = image->priv;

  switch (prop_id)
    {
    case PROP_PIXBUF:
      gtk_image_set_from_pixbuf (image,
                                 g_value_get_object (value));
      break;
    case PROP_FILE:
      gtk_image_set_from_file (image, g_value_get_string (value));
      break;
    case PROP_STOCK:
      gtk_image_set_from_stock (image, g_value_get_string (value),
                                priv->icon_size);
      break;
    case PROP_ICON_SET:
      gtk_image_set_from_icon_set (image, g_value_get_boxed (value),
                                   priv->icon_size);
      break;
    case PROP_ICON_SIZE:
      if (priv->storage_type == GTK_IMAGE_STOCK)
        gtk_image_set_from_stock (image,
                                  priv->data.stock.stock_id,
                                  g_value_get_int (value));
      else if (priv->storage_type == GTK_IMAGE_ICON_SET)
        gtk_image_set_from_icon_set (image,
                                     priv->data.icon_set.icon_set,
                                     g_value_get_int (value));
      else if (priv->storage_type == GTK_IMAGE_ICON_NAME)
        gtk_image_set_from_icon_name (image,
				      priv->data.name.icon_name,
				      g_value_get_int (value));
      else if (priv->storage_type == GTK_IMAGE_GICON)
        gtk_image_set_from_gicon (image,
                                  priv->data.gicon.icon,
                                  g_value_get_int (value));
      else
        /* Save to be used when STOCK, ICON_SET, ICON_NAME or GICON property comes in */
        priv->icon_size = g_value_get_int (value);
      break;
    case PROP_PIXEL_SIZE:
      gtk_image_set_pixel_size (image, g_value_get_int (value));
      break;
    case PROP_PIXBUF_ANIMATION:
      gtk_image_set_from_animation (image,
                                    g_value_get_object (value));
      break;
    case PROP_ICON_NAME:
      gtk_image_set_from_icon_name (image, g_value_get_string (value),
				    priv->icon_size);
      break;
    case PROP_GICON:
      gtk_image_set_from_gicon (image, g_value_get_object (value),
				priv->icon_size);
      break;

    case PROP_USE_FALLBACK:
      priv->use_fallback = g_value_get_boolean (value);
      if (priv->storage_type == GTK_IMAGE_ICON_NAME)
        gtk_image_set_from_icon_name (image,
				      priv->data.name.icon_name,
				      priv->icon_size);
      else if (priv->storage_type == GTK_IMAGE_GICON)
        gtk_image_set_from_gicon (image,
                                  priv->data.gicon.icon,
                                  priv->icon_size);
      break;

    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}

static void 
gtk_image_get_property (GObject     *object,
			guint        prop_id,
			GValue      *value,
			GParamSpec  *pspec)
{
  GtkImage *image = GTK_IMAGE (object);
  GtkImagePrivate *priv = image->priv;

  /* The "getter" functions whine if you try to get the wrong
   * storage type. This function is instead robust against that,
   * so that GUI builders don't have to jump through hoops
   * to avoid g_warning
   */
  
  switch (prop_id)
    {
    case PROP_PIXBUF:
      if (priv->storage_type != GTK_IMAGE_PIXBUF)
        g_value_set_object (value, NULL);
      else
        g_value_set_object (value,
                            gtk_image_get_pixbuf (image));
      break;
    case PROP_FILE:
      g_value_set_string (value, priv->filename);
      break;
    case PROP_STOCK:
      if (priv->storage_type != GTK_IMAGE_STOCK)
        g_value_set_string (value, NULL);
      else
        g_value_set_string (value,
                            priv->data.stock.stock_id);
      break;
    case PROP_ICON_SET:
      if (priv->storage_type != GTK_IMAGE_ICON_SET)
        g_value_set_boxed (value, NULL);
      else
        g_value_set_boxed (value,
                           priv->data.icon_set.icon_set);
      break;      
    case PROP_ICON_SIZE:
      g_value_set_int (value, priv->icon_size);
      break;
    case PROP_PIXEL_SIZE:
      g_value_set_int (value, priv->pixel_size);
      break;
    case PROP_PIXBUF_ANIMATION:
      if (priv->storage_type != GTK_IMAGE_ANIMATION)
        g_value_set_object (value, NULL);
      else
        g_value_set_object (value,
                            priv->data.anim.anim);
      break;
    case PROP_ICON_NAME:
      if (priv->storage_type != GTK_IMAGE_ICON_NAME)
	g_value_set_string (value, NULL);
      else
	g_value_set_string (value,
			    priv->data.name.icon_name);
      break;
    case PROP_GICON:
      if (priv->storage_type != GTK_IMAGE_GICON)
	g_value_set_object (value, NULL);
      else
	g_value_set_object (value,
			    priv->data.gicon.icon);
      break;
    case PROP_STORAGE_TYPE:
      g_value_set_enum (value, priv->storage_type);
      break;

    case PROP_USE_FALLBACK:
      g_value_set_boolean (value, priv->use_fallback);
      break;
      
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}


/**
 * gtk_image_new_from_file:
 * @filename: (type filename): a filename
 * 
 * Creates a new #GtkImage displaying the file @filename. If the file
 * isn't found or can't be loaded, the resulting #GtkImage will
 * display a "broken image" icon. This function never returns %NULL,
 * it always returns a valid #GtkImage widget.
 *
 * If the file contains an animation, the image will contain an
 * animation.
 *
 * If you need to detect failures to load the file, use
 * gdk_pixbuf_new_from_file() to load the file yourself, then create
 * the #GtkImage from the pixbuf. (Or for animations, use
 * gdk_pixbuf_animation_new_from_file()).
 *
 * The storage type (gtk_image_get_storage_type()) of the returned
 * image is not defined, it will be whatever is appropriate for
 * displaying the file.
 * 
 * Return value: a new #GtkImage
 **/
GtkWidget*
gtk_image_new_from_file   (const gchar *filename)
{
  GtkImage *image;

  image = g_object_new (GTK_TYPE_IMAGE, NULL);

  gtk_image_set_from_file (image, filename);

  return GTK_WIDGET (image);
}

/**
 * gtk_image_new_from_pixbuf:
 * @pixbuf: (allow-none): a #GdkPixbuf, or %NULL
 *
 * Creates a new #GtkImage displaying @pixbuf.
 * The #GtkImage does not assume a reference to the
 * pixbuf; you still need to unref it if you own references.
 * #GtkImage will add its own reference rather than adopting yours.
 * 
 * Note that this function just creates an #GtkImage from the pixbuf. The
 * #GtkImage created will not react to state changes. Should you want that, 
 * you should use gtk_image_new_from_icon_set().
 * 
 * Return value: a new #GtkImage
 **/
GtkWidget*
gtk_image_new_from_pixbuf (GdkPixbuf *pixbuf)
{
  GtkImage *image;

  image = g_object_new (GTK_TYPE_IMAGE, NULL);

  gtk_image_set_from_pixbuf (image, pixbuf);

  return GTK_WIDGET (image);  
}

/**
 * gtk_image_new_from_stock:
 * @stock_id: a stock icon name
 * @size: (type int): a stock icon size
 * 
 * Creates a #GtkImage displaying a stock icon. Sample stock icon
 * names are #GTK_STOCK_OPEN, #GTK_STOCK_QUIT. Sample stock sizes
 * are #GTK_ICON_SIZE_MENU, #GTK_ICON_SIZE_SMALL_TOOLBAR. If the stock
 * icon name isn't known, the image will be empty.
 * You can register your own stock icon names, see
 * gtk_icon_factory_add_default() and gtk_icon_factory_add().
 * 
 * Return value: a new #GtkImage displaying the stock icon
 **/
GtkWidget*
gtk_image_new_from_stock (const gchar    *stock_id,
                          GtkIconSize     size)
{
  GtkImage *image;

  image = g_object_new (GTK_TYPE_IMAGE, NULL);

  gtk_image_set_from_stock (image, stock_id, size);

  return GTK_WIDGET (image);
}

/**
 * gtk_image_new_from_icon_set:
 * @icon_set: a #GtkIconSet
 * @size: (type int): a stock icon size
 *
 * Creates a #GtkImage displaying an icon set. Sample stock sizes are
 * #GTK_ICON_SIZE_MENU, #GTK_ICON_SIZE_SMALL_TOOLBAR. Instead of using
 * this function, usually it's better to create a #GtkIconFactory, put
 * your icon sets in the icon factory, add the icon factory to the
 * list of default factories with gtk_icon_factory_add_default(), and
 * then use gtk_image_new_from_stock(). This will allow themes to
 * override the icon you ship with your application.
 *
 * The #GtkImage does not assume a reference to the
 * icon set; you still need to unref it if you own references.
 * #GtkImage will add its own reference rather than adopting yours.
 * 
 * Return value: a new #GtkImage
 **/
GtkWidget*
gtk_image_new_from_icon_set (GtkIconSet     *icon_set,
                             GtkIconSize     size)
{
  GtkImage *image;

  image = g_object_new (GTK_TYPE_IMAGE, NULL);

  gtk_image_set_from_icon_set (image, icon_set, size);

  return GTK_WIDGET (image);
}

/**
 * gtk_image_new_from_animation:
 * @animation: an animation
 * 
 * Creates a #GtkImage displaying the given animation.
 * The #GtkImage does not assume a reference to the
 * animation; you still need to unref it if you own references.
 * #GtkImage will add its own reference rather than adopting yours.
 *
 * Note that the animation frames are shown using a timeout with
 * #G_PRIORITY_DEFAULT. When using animations to indicate busyness,
 * keep in mind that the animation will only be shown if the main loop
 * is not busy with something that has a higher priority.
 *
 * Return value: a new #GtkImage widget
 **/
GtkWidget*
gtk_image_new_from_animation (GdkPixbufAnimation *animation)
{
  GtkImage *image;

  g_return_val_if_fail (GDK_IS_PIXBUF_ANIMATION (animation), NULL);
  
  image = g_object_new (GTK_TYPE_IMAGE, NULL);

  gtk_image_set_from_animation (image, animation);

  return GTK_WIDGET (image);
}

/**
 * gtk_image_new_from_icon_name:
 * @icon_name: an icon name
 * @size: (type int): a stock icon size
 * 
 * Creates a #GtkImage displaying an icon from the current icon theme.
 * If the icon name isn't known, a "broken image" icon will be
 * displayed instead.  If the current icon theme is changed, the icon
 * will be updated appropriately.
 * 
 * Return value: a new #GtkImage displaying the themed icon
 *
 * Since: 2.6
 **/
GtkWidget*
gtk_image_new_from_icon_name (const gchar    *icon_name,
			      GtkIconSize     size)
{
  GtkImage *image;

  image = g_object_new (GTK_TYPE_IMAGE, NULL);

  gtk_image_set_from_icon_name (image, icon_name, size);

  return GTK_WIDGET (image);
}

/**
 * gtk_image_new_from_gicon:
 * @icon: an icon
 * @size: (type int): a stock icon size
 * 
 * Creates a #GtkImage displaying an icon from the current icon theme.
 * If the icon name isn't known, a "broken image" icon will be
 * displayed instead.  If the current icon theme is changed, the icon
 * will be updated appropriately.
 * 
 * Return value: a new #GtkImage displaying the themed icon
 *
 * Since: 2.14
 **/
GtkWidget*
gtk_image_new_from_gicon (GIcon *icon,
			  GtkIconSize     size)
{
  GtkImage *image;

  image = g_object_new (GTK_TYPE_IMAGE, NULL);

  gtk_image_set_from_gicon (image, icon, size);

  return GTK_WIDGET (image);
}

/**
 * gtk_image_set_from_file:
 * @image: a #GtkImage
 * @filename: (type filename) (allow-none): a filename or %NULL
 *
 * See gtk_image_new_from_file() for details.
 **/
void
gtk_image_set_from_file   (GtkImage    *image,
                           const gchar *filename)
{
  GtkImagePrivate *priv;
  GdkPixbufAnimation *anim;
  
  g_return_if_fail (GTK_IS_IMAGE (image));

  priv = image->priv;

  g_object_freeze_notify (G_OBJECT (image));
  
  gtk_image_clear (image);

  if (filename == NULL)
    {
      priv->filename = NULL;
      g_object_thaw_notify (G_OBJECT (image));
      return;
    }

  anim = gdk_pixbuf_animation_new_from_file (filename, NULL);

  if (anim == NULL)
    {
      gtk_image_set_from_stock (image,
                                GTK_STOCK_MISSING_IMAGE,
                                GTK_ICON_SIZE_BUTTON);
      g_object_thaw_notify (G_OBJECT (image));
      return;
    }

  /* We could just unconditionally set_from_animation,
   * but it's nicer for memory if we toss the animation
   * if it's just a single pixbuf
   */

  if (gdk_pixbuf_animation_is_static_image (anim))
    gtk_image_set_from_pixbuf (image,
			       gdk_pixbuf_animation_get_static_image (anim));
  else
    gtk_image_set_from_animation (image, anim);

  g_object_unref (anim);

  priv->filename = g_strdup (filename);
  
  g_object_thaw_notify (G_OBJECT (image));
}

/**
 * gtk_image_set_from_pixbuf:
 * @image: a #GtkImage
 * @pixbuf: (allow-none): a #GdkPixbuf or %NULL
 *
 * See gtk_image_new_from_pixbuf() for details.
 **/
void
gtk_image_set_from_pixbuf (GtkImage  *image,
                           GdkPixbuf *pixbuf)
{
  GtkImagePrivate *priv;

  g_return_if_fail (GTK_IS_IMAGE (image));
  g_return_if_fail (pixbuf == NULL ||
                    GDK_IS_PIXBUF (pixbuf));

  priv = image->priv;

  g_object_freeze_notify (G_OBJECT (image));
  
  if (pixbuf)
    g_object_ref (pixbuf);

  gtk_image_clear (image);

  if (pixbuf != NULL)
    {
      priv->storage_type = GTK_IMAGE_PIXBUF;

      priv->data.pixbuf.pixbuf = pixbuf;

      gtk_image_update_size (image,
                             gdk_pixbuf_get_width (pixbuf),
                             gdk_pixbuf_get_height (pixbuf));
    }

  g_object_notify (G_OBJECT (image), "pixbuf");
  
  g_object_thaw_notify (G_OBJECT (image));
}

/**
 * gtk_image_set_from_stock:
 * @image: a #GtkImage
 * @stock_id: a stock icon name
 * @size: (type int): a stock icon size
 *
 * See gtk_image_new_from_stock() for details.
 **/
void
gtk_image_set_from_stock  (GtkImage       *image,
                           const gchar    *stock_id,
                           GtkIconSize     size)
{
  GtkImagePrivate *priv;
  gchar *new_id;

  g_return_if_fail (GTK_IS_IMAGE (image));

  priv = image->priv;

  g_object_freeze_notify (G_OBJECT (image));

  /* in case stock_id == priv->data.stock.stock_id */
  new_id = g_strdup (stock_id);
  
  gtk_image_clear (image);

  if (new_id)
    {
      priv->storage_type = GTK_IMAGE_STOCK;
      
      priv->data.stock.stock_id = new_id;
      priv->icon_size = size;

      /* Size is demand-computed in size request method
       * if we're a stock image, since changing the
       * style impacts the size request
       */
    }

  g_object_notify (G_OBJECT (image), "stock");
  g_object_notify (G_OBJECT (image), "icon-size");
  
  g_object_thaw_notify (G_OBJECT (image));
}

/**
 * gtk_image_set_from_icon_set:
 * @image: a #GtkImage
 * @icon_set: a #GtkIconSet
 * @size: (type int): a stock icon size
 *
 * See gtk_image_new_from_icon_set() for details.
 **/
void
gtk_image_set_from_icon_set  (GtkImage       *image,
                              GtkIconSet     *icon_set,
                              GtkIconSize     size)
{
  GtkImagePrivate *priv;

  g_return_if_fail (GTK_IS_IMAGE (image));

  priv = image->priv;

  g_object_freeze_notify (G_OBJECT (image));
  
  if (icon_set)
    gtk_icon_set_ref (icon_set);
  
  gtk_image_clear (image);

  if (icon_set)
    {      
      priv->storage_type = GTK_IMAGE_ICON_SET;
      
      priv->data.icon_set.icon_set = icon_set;
      priv->icon_size = size;

      /* Size is demand-computed in size request method
       * if we're an icon set
       */
    }
  
  g_object_notify (G_OBJECT (image), "icon-set");
  g_object_notify (G_OBJECT (image), "icon-size");
  
  g_object_thaw_notify (G_OBJECT (image));
}

/**
 * gtk_image_set_from_animation:
 * @image: a #GtkImage
 * @animation: the #GdkPixbufAnimation
 * 
 * Causes the #GtkImage to display the given animation (or display
 * nothing, if you set the animation to %NULL).
 **/
void
gtk_image_set_from_animation (GtkImage           *image,
                              GdkPixbufAnimation *animation)
{
  GtkImagePrivate *priv;

  g_return_if_fail (GTK_IS_IMAGE (image));
  g_return_if_fail (animation == NULL ||
                    GDK_IS_PIXBUF_ANIMATION (animation));

  priv = image->priv;

  g_object_freeze_notify (G_OBJECT (image));
  
  if (animation)
    g_object_ref (animation);

  gtk_image_clear (image);

  if (animation != NULL)
    {
      priv->storage_type = GTK_IMAGE_ANIMATION;

      priv->data.anim.anim = animation;
      priv->data.anim.frame_timeout = 0;
      priv->data.anim.iter = NULL;
      
      gtk_image_update_size (image,
                             gdk_pixbuf_animation_get_width (animation),
                             gdk_pixbuf_animation_get_height (animation));
    }

  g_object_notify (G_OBJECT (image), "pixbuf-animation");
  
  g_object_thaw_notify (G_OBJECT (image));
}

/**
 * gtk_image_set_from_icon_name:
 * @image: a #GtkImage
 * @icon_name: an icon name
 * @size: (type int): an icon size
 *
 * See gtk_image_new_from_icon_name() for details.
 * 
 * Since: 2.6
 **/
void
gtk_image_set_from_icon_name  (GtkImage       *image,
			       const gchar    *icon_name,
			       GtkIconSize     size)
{
  gchar *new_name;
  GtkImagePrivate *priv;

  g_return_if_fail (GTK_IS_IMAGE (image));

  priv = image->priv;

  g_object_freeze_notify (G_OBJECT (image));

  /* in case icon_name == priv->data.name.icon_name */
  new_name = g_strdup (icon_name);
  
  gtk_image_clear (image);

  if (new_name)
    {
      priv->storage_type = GTK_IMAGE_ICON_NAME;
      
      priv->data.name.icon_name = new_name;
      priv->icon_size = size;

      /* Size is demand-computed in size request method
       * if we're a icon theme image, since changing the
       * style impacts the size request
       */
    }

  g_object_notify (G_OBJECT (image), "icon-name");
  g_object_notify (G_OBJECT (image), "icon-size");
  
  g_object_thaw_notify (G_OBJECT (image));
}

/**
 * gtk_image_set_from_gicon:
 * @image: a #GtkImage
 * @icon: an icon
 * @size: (type int): an icon size
 *
 * See gtk_image_new_from_gicon() for details.
 * 
 * Since: 2.14
 **/
void
gtk_image_set_from_gicon  (GtkImage       *image,
			   GIcon          *icon,
			   GtkIconSize     size)
{
  GtkImagePrivate *priv;

  g_return_if_fail (GTK_IS_IMAGE (image));

  priv = image->priv;

  g_object_freeze_notify (G_OBJECT (image));

  /* in case icon == priv->data.gicon.icon */
  if (icon)
    g_object_ref (icon);
  
  gtk_image_clear (image);

  if (icon)
    {
      priv->storage_type = GTK_IMAGE_GICON;

      priv->data.gicon.icon = icon;
      priv->icon_size = size;

      /* Size is demand-computed in size request method
       * if we're a icon theme image, since changing the
       * style impacts the size request
       */
    }

  g_object_notify (G_OBJECT (image), "gicon");
  g_object_notify (G_OBJECT (image), "icon-size");
  
  g_object_thaw_notify (G_OBJECT (image));
}

/**
 * gtk_image_get_storage_type:
 * @image: a #GtkImage
 * 
 * Gets the type of representation being used by the #GtkImage
 * to store image data. If the #GtkImage has no image data,
 * the return value will be %GTK_IMAGE_EMPTY.
 * 
 * Return value: image representation being used
 **/
GtkImageType
gtk_image_get_storage_type (GtkImage *image)
{
  g_return_val_if_fail (GTK_IS_IMAGE (image), GTK_IMAGE_EMPTY);

  return image->priv->storage_type;
}

/**
 * gtk_image_get_pixbuf:
 * @image: a #GtkImage
 *
 * Gets the #GdkPixbuf being displayed by the #GtkImage.
 * The storage type of the image must be %GTK_IMAGE_EMPTY or
 * %GTK_IMAGE_PIXBUF (see gtk_image_get_storage_type()).
 * The caller of this function does not own a reference to the
 * returned pixbuf.
 * 
 * Return value: (transfer none): the displayed pixbuf, or %NULL if
 * the image is empty
 **/
GdkPixbuf*
gtk_image_get_pixbuf (GtkImage *image)
{
  GtkImagePrivate *priv;

  g_return_val_if_fail (GTK_IS_IMAGE (image), NULL);

  priv = image->priv;

  g_return_val_if_fail (priv->storage_type == GTK_IMAGE_PIXBUF ||
                        priv->storage_type == GTK_IMAGE_EMPTY, NULL);

  if (priv->storage_type == GTK_IMAGE_EMPTY)
    priv->data.pixbuf.pixbuf = NULL;

  return priv->data.pixbuf.pixbuf;
}

/**
 * gtk_image_get_stock:
 * @image: a #GtkImage
 * @stock_id: (out) (transfer none) (allow-none): place to store a
 *     stock icon name, or %NULL
 * @size: (out) (allow-none) (type int): place to store a stock icon
 *     size, or %NULL
 *
 * Gets the stock icon name and size being displayed by the #GtkImage.
 * The storage type of the image must be %GTK_IMAGE_EMPTY or
 * %GTK_IMAGE_STOCK (see gtk_image_get_storage_type()).
 * The returned string is owned by the #GtkImage and should not
 * be freed.
 **/
void
gtk_image_get_stock  (GtkImage        *image,
                      gchar          **stock_id,
                      GtkIconSize     *size)
{
  GtkImagePrivate *priv;

  g_return_if_fail (GTK_IS_IMAGE (image));

  priv = image->priv;

  g_return_if_fail (priv->storage_type == GTK_IMAGE_STOCK ||
                    priv->storage_type == GTK_IMAGE_EMPTY);

  if (priv->storage_type == GTK_IMAGE_EMPTY)
    priv->data.stock.stock_id = NULL;

  if (stock_id)
    *stock_id = priv->data.stock.stock_id;

  if (size)
    *size = priv->icon_size;
}

/**
 * gtk_image_get_icon_set:
 * @image: a #GtkImage
 * @icon_set: (out) (transfer none) (allow-none): location to store a
 *     #GtkIconSet, or %NULL
 * @size: (out) (allow-none) (type int): location to store a stock
 *     icon size, or %NULL
 *
 * Gets the icon set and size being displayed by the #GtkImage.
 * The storage type of the image must be %GTK_IMAGE_EMPTY or
 * %GTK_IMAGE_ICON_SET (see gtk_image_get_storage_type()).
 **/
void
gtk_image_get_icon_set  (GtkImage        *image,
                         GtkIconSet     **icon_set,
                         GtkIconSize     *size)
{
  GtkImagePrivate *priv;

  g_return_if_fail (GTK_IS_IMAGE (image));

  priv = image->priv;

  g_return_if_fail (priv->storage_type == GTK_IMAGE_ICON_SET ||
                    priv->storage_type == GTK_IMAGE_EMPTY);

  if (icon_set)
    *icon_set = priv->data.icon_set.icon_set;

  if (size)
    *size = priv->icon_size;
}

/**
 * gtk_image_get_animation:
 * @image: a #GtkImage
 *
 * Gets the #GdkPixbufAnimation being displayed by the #GtkImage.
 * The storage type of the image must be %GTK_IMAGE_EMPTY or
 * %GTK_IMAGE_ANIMATION (see gtk_image_get_storage_type()).
 * The caller of this function does not own a reference to the
 * returned animation.
 * 
 * Return value: (transfer none): the displayed animation, or %NULL if
 * the image is empty
 **/
GdkPixbufAnimation*
gtk_image_get_animation (GtkImage *image)
{
  GtkImagePrivate *priv;

  g_return_val_if_fail (GTK_IS_IMAGE (image), NULL);

  priv = image->priv;

  g_return_val_if_fail (priv->storage_type == GTK_IMAGE_ANIMATION ||
                        priv->storage_type == GTK_IMAGE_EMPTY,
                        NULL);

  if (priv->storage_type == GTK_IMAGE_EMPTY)
    priv->data.anim.anim = NULL;

  return priv->data.anim.anim;
}

/**
 * gtk_image_get_icon_name:
 * @image: a #GtkImage
 * @icon_name: (out) (transfer none) (allow-none): place to store an
 *     icon name, or %NULL
 * @size: (out) (allow-none) (type int): place to store an icon size,
 *     or %NULL
 *
 * Gets the icon name and size being displayed by the #GtkImage.
 * The storage type of the image must be %GTK_IMAGE_EMPTY or
 * %GTK_IMAGE_ICON_NAME (see gtk_image_get_storage_type()).
 * The returned string is owned by the #GtkImage and should not
 * be freed.
 * 
 * Since: 2.6
 **/
void
gtk_image_get_icon_name  (GtkImage     *image,
			  const gchar **icon_name,
			  GtkIconSize  *size)
{
  GtkImagePrivate *priv;

  g_return_if_fail (GTK_IS_IMAGE (image));

  priv = image->priv;

  g_return_if_fail (priv->storage_type == GTK_IMAGE_ICON_NAME ||
                    priv->storage_type == GTK_IMAGE_EMPTY);

  if (priv->storage_type == GTK_IMAGE_EMPTY)
    priv->data.name.icon_name = NULL;

  if (icon_name)
    *icon_name = priv->data.name.icon_name;

  if (size)
    *size = priv->icon_size;
}

/**
 * gtk_image_get_gicon:
 * @image: a #GtkImage
 * @gicon: (out) (transfer none) (allow-none): place to store a
 *     #GIcon, or %NULL
 * @size: (out) (allow-none) (type int): place to store an icon size,
 *     or %NULL
 *
 * Gets the #GIcon and size being displayed by the #GtkImage.
 * The storage type of the image must be %GTK_IMAGE_EMPTY or
 * %GTK_IMAGE_GICON (see gtk_image_get_storage_type()).
 * The caller of this function does not own a reference to the
 * returned #GIcon.
 * 
 * Since: 2.14
 **/
void
gtk_image_get_gicon (GtkImage     *image,
		     GIcon       **gicon,
		     GtkIconSize  *size)
{
  GtkImagePrivate *priv;

  g_return_if_fail (GTK_IS_IMAGE (image));

  priv = image->priv;

  g_return_if_fail (priv->storage_type == GTK_IMAGE_GICON ||
                    priv->storage_type == GTK_IMAGE_EMPTY);

  if (priv->storage_type == GTK_IMAGE_EMPTY)
    priv->data.gicon.icon = NULL;

  if (gicon)
    *gicon = priv->data.gicon.icon;

  if (size)
    *size = priv->icon_size;
}

/**
 * gtk_image_new:
 * 
 * Creates a new empty #GtkImage widget.
 * 
 * Return value: a newly created #GtkImage widget. 
 **/
GtkWidget*
gtk_image_new (void)
{
  return g_object_new (GTK_TYPE_IMAGE, NULL);
}

static void
gtk_image_reset_anim_iter (GtkImage *image)
{
  GtkImagePrivate *priv = image->priv;

  if (priv->storage_type == GTK_IMAGE_ANIMATION)
    {
      /* Reset the animation */
      
      if (priv->data.anim.frame_timeout)
        {
          g_source_remove (priv->data.anim.frame_timeout);
          priv->data.anim.frame_timeout = 0;
        }

      if (priv->data.anim.iter)
        {
          g_object_unref (priv->data.anim.iter);
          priv->data.anim.iter = NULL;
        }
    }
}

static void
gtk_image_unmap (GtkWidget *widget)
{
  gtk_image_reset_anim_iter (GTK_IMAGE (widget));

  GTK_WIDGET_CLASS (gtk_image_parent_class)->unmap (widget);
}

static void
gtk_image_unrealize (GtkWidget *widget)
{
  gtk_image_reset_anim_iter (GTK_IMAGE (widget));

  GTK_WIDGET_CLASS (gtk_image_parent_class)->unrealize (widget);
}

static gint
animation_timeout (gpointer data)
{
  GtkImage *image = GTK_IMAGE (data);
  GtkImagePrivate *priv = image->priv;
  int delay;

  priv->data.anim.frame_timeout = 0;

  gdk_pixbuf_animation_iter_advance (priv->data.anim.iter, NULL);

  delay = gdk_pixbuf_animation_iter_get_delay_time (priv->data.anim.iter);
  if (delay >= 0)
    {
      GtkWidget *widget = GTK_WIDGET (image);

      priv->data.anim.frame_timeout =
        gdk_threads_add_timeout (delay, animation_timeout, image);

      gtk_widget_queue_draw (widget);

      if (gtk_widget_is_drawable (widget))
        gdk_window_process_updates (gtk_widget_get_window (widget), TRUE);
    }

  return FALSE;
}

static void
icon_theme_changed (GtkImage *image)
{
  GtkImagePrivate *priv = image->priv;

  if (priv->storage_type == GTK_IMAGE_ICON_NAME)
    {
      if (priv->data.name.pixbuf)
	g_object_unref (priv->data.name.pixbuf);
      priv->data.name.pixbuf = NULL;

      gtk_widget_queue_draw (GTK_WIDGET (image));
    }
  if (priv->storage_type == GTK_IMAGE_GICON)
    {
      if (priv->data.gicon.pixbuf)
	g_object_unref (priv->data.gicon.pixbuf);
      priv->data.gicon.pixbuf = NULL;

      gtk_widget_queue_draw (GTK_WIDGET (image));
    }
}

static void
ensure_icon_size (GtkImage *image,
		  GtkIconLookupFlags *flags,
		  gint *width_out,
		  gint *height_out)
{
  GtkImagePrivate *priv = image->priv;
  gint width, height;
  GtkSettings *settings;
  GdkScreen *screen;
  GtkIconTheme *icon_theme;
  gint *s, *sizes, dist;

  screen = gtk_widget_get_screen (GTK_WIDGET (image));
  settings = gtk_settings_get_for_screen (screen);
  icon_theme = gtk_icon_theme_get_for_screen (screen);

  if (priv->pixel_size != -1)
    {
      width = height = priv->pixel_size;
      *flags |= GTK_ICON_LOOKUP_FORCE_SIZE;
    }
  else if (!gtk_icon_size_lookup_for_settings (settings,
					       priv->icon_size,
					       &width, &height))
    {
      if (priv->icon_size == -1)
	{
	  /* Find an available size close to 48 */
	  sizes = gtk_icon_theme_get_icon_sizes (icon_theme, priv->data.name.icon_name);
	  dist = 100;
	  width = height = 48;
	  for (s = sizes; *s; s++)
	    {
	      if (*s == -1)
		{
		  width = height = 48;
		  break;
		}
	      if (*s < 48)
		{
		  if (48 - *s < dist)
		    {
		      width = height = *s;
		      dist = 48 - *s;
		    }
		}
	      else
		{
		  if (*s - 48 < dist)
		    {
		      width = height = *s;
		      dist = *s - 48;
		    }
		}
	    }
	  g_free (sizes);
	}
      else
	{
	  g_warning ("Invalid icon size %d\n", priv->icon_size);
	  width = height = 24;
	}
    }

  *width_out = width;
  *height_out = height;
}

static GdkPixbuf *
ensure_stated_icon_from_info (GtkImage *image,
			      GtkIconInfo *info)
{
  GtkImagePrivate *priv = image->priv;
  GtkStyleContext *context;
  GdkPixbuf *destination = NULL;
  gboolean symbolic;

  context = gtk_widget_get_style_context (GTK_WIDGET (image));
  symbolic = FALSE;

  if (info)
    destination =
      gtk_icon_info_load_symbolic_for_context (info,
					       context,
					       &symbolic,
					       NULL);

  if (destination == NULL)
    {
      destination =
	gtk_widget_render_icon_pixbuf (GTK_WIDGET (image),
				       GTK_STOCK_MISSING_IMAGE,
				       priv->icon_size);
    }
  else if (!symbolic)
    {
      GtkIconSource *source;
      GdkPixbuf *rendered;

      source = gtk_icon_source_new ();
      gtk_icon_source_set_pixbuf (source, destination);
      /* The size here is arbitrary; since size isn't
       * wildcarded in the source, it isn't supposed to be
       * scaled by the engine function
       */
      gtk_icon_source_set_size (source,
				GTK_ICON_SIZE_SMALL_TOOLBAR);
      gtk_icon_source_set_size_wildcarded (source, FALSE);

      rendered = gtk_render_icon_pixbuf (context, source, (GtkIconSize) -1);
      gtk_icon_source_free (source);

      g_object_unref (destination);
      destination = rendered;
    }

  return destination;
}

static void
ensure_pixbuf_for_icon_name (GtkImage        *image,
                             GtkStateFlags    state)
{
  GtkImagePrivate *priv = image->priv;
  GdkScreen *screen;
  GtkIconTheme *icon_theme;
  gint width, height;
  GtkIconInfo *info;
  GtkIconLookupFlags flags;

  g_return_if_fail (priv->storage_type == GTK_IMAGE_ICON_NAME);

  screen = gtk_widget_get_screen (GTK_WIDGET (image));
  icon_theme = gtk_icon_theme_get_for_screen (screen);

  flags = GTK_ICON_LOOKUP_USE_BUILTIN;

  if (priv->use_fallback)
    flags |= GTK_ICON_LOOKUP_GENERIC_FALLBACK;

  if ((priv->data.name.pixbuf == NULL) ||
      (priv->last_rendered_state != state))
    {
      priv->last_rendered_state = state;

      if (priv->data.name.pixbuf)
        {
          g_object_unref (priv->data.name.pixbuf);
          priv->data.name.pixbuf = NULL;
	}

      ensure_icon_size (image, &flags, &width, &height);
      info = gtk_icon_theme_lookup_icon (icon_theme,
                                         priv->data.name.icon_name,
                                         MIN (width, height), flags);

      priv->data.name.pixbuf = ensure_stated_icon_from_info (image, info);

      if (info)
	gtk_icon_info_free (info);
    }
}

static void
ensure_pixbuf_for_gicon (GtkImage        *image,
                         GtkStateFlags    state)
{
  GtkImagePrivate *priv = image->priv;
  GdkScreen *screen;
  GtkIconTheme *icon_theme;
  gint width, height;
  GtkIconInfo *info;
  GtkIconLookupFlags flags;

  g_return_if_fail (priv->storage_type == GTK_IMAGE_GICON);

  screen = gtk_widget_get_screen (GTK_WIDGET (image));
  icon_theme = gtk_icon_theme_get_for_screen (screen);

  flags = GTK_ICON_LOOKUP_USE_BUILTIN;

  if (priv->use_fallback)
    flags |= GTK_ICON_LOOKUP_GENERIC_FALLBACK;

  if ((priv->data.gicon.pixbuf == NULL) ||
      (priv->last_rendered_state != state))
    {
      priv->last_rendered_state = state;

      if (priv->data.gicon.pixbuf)
        {
          g_object_unref (priv->data.gicon.pixbuf);
          priv->data.gicon.pixbuf = NULL;
	}

      ensure_icon_size (image, &flags, &width, &height);
      info = gtk_icon_theme_lookup_by_gicon (icon_theme,
					     priv->data.gicon.icon,
					     MIN (width, height), flags);

      priv->data.gicon.pixbuf = ensure_stated_icon_from_info (image, info);

      if (info)
	gtk_icon_info_free (info);
    }
}

static gint
gtk_image_draw (GtkWidget *widget,
                cairo_t   *cr)
{
  GtkImage *image;
  GtkImagePrivate *priv;

  g_return_val_if_fail (GTK_IS_IMAGE (widget), FALSE);

  image = GTK_IMAGE (widget);
  priv = image->priv;
  
  if (priv->storage_type != GTK_IMAGE_EMPTY)
    {
      GtkMisc *misc;
      gint x, y;
      gint xpad, ypad;
      gfloat xalign, yalign;
      GdkPixbuf *pixbuf;
      GtkStateFlags state;
      GtkStyleContext *context;

      misc = GTK_MISC (widget);
      context = gtk_widget_get_style_context (widget);

      state = gtk_widget_get_state_flags (widget);

      gtk_style_context_save (context);
      gtk_style_context_set_state (context, state);

      /* For stock items and icon sets, we lazily calculate
       * the size; we might get here between a queue_resize()
       * and size_request() if something explicitely forces
       * a redraw.
       */
      if (priv->need_calc_size)
	gtk_image_calc_size (image);

      gtk_misc_get_alignment (misc, &xalign, &yalign);
      gtk_misc_get_padding (misc, &xpad, &ypad);

      if (gtk_widget_get_direction (widget) != GTK_TEXT_DIR_LTR)
	xalign = 1.0 - xalign;

      x = floor (xpad + ((gtk_widget_get_allocated_width (widget) - priv->required_width) * xalign));
      y = floor (ypad + ((gtk_widget_get_allocated_height (widget) - priv->required_height) * yalign));

      switch (priv->storage_type)
        {

        case GTK_IMAGE_PIXBUF:
          pixbuf = priv->data.pixbuf.pixbuf;
          g_object_ref (pixbuf);
          break;

        case GTK_IMAGE_STOCK:
          pixbuf = gtk_widget_render_icon_pixbuf (widget,
                                                  priv->data.stock.stock_id,
                                                  priv->icon_size);
          break;

        case GTK_IMAGE_ICON_SET:
          pixbuf =
            gtk_icon_set_render_icon_pixbuf (priv->data.icon_set.icon_set,
                                             context, priv->icon_size);
          break;

        case GTK_IMAGE_ANIMATION:
          {
            if (priv->data.anim.iter == NULL)
              {
                priv->data.anim.iter = gdk_pixbuf_animation_get_iter (priv->data.anim.anim, NULL);
                
                if (gdk_pixbuf_animation_iter_get_delay_time (priv->data.anim.iter) >= 0)
                  priv->data.anim.frame_timeout =
                    gdk_threads_add_timeout (gdk_pixbuf_animation_iter_get_delay_time (priv->data.anim.iter),
                                   animation_timeout,
                                   image);
              }

            /* don't advance the anim iter here, or we could get frame changes between two
             * exposes of different areas.
             */
            
            pixbuf = gdk_pixbuf_animation_iter_get_pixbuf (priv->data.anim.iter);
            g_object_ref (pixbuf);
          }
          break;

	case GTK_IMAGE_ICON_NAME:
          ensure_pixbuf_for_icon_name (image, state);
	  pixbuf = priv->data.name.pixbuf;
	  if (pixbuf)
	    {
	      g_object_ref (pixbuf);
	    }
	  break;

	case GTK_IMAGE_GICON:
          ensure_pixbuf_for_gicon (image, state);
	  pixbuf = priv->data.gicon.pixbuf;
	  if (pixbuf)
	    {
	      g_object_ref (pixbuf);
	    }
	  break;

        case GTK_IMAGE_EMPTY:
        default:
          g_assert_not_reached ();
          pixbuf = NULL;
          break;
        }

      if (pixbuf)
        {
          gtk_render_icon (context, cr,
                           pixbuf,
                           x, y);

          g_object_unref (pixbuf);
        }

      gtk_style_context_restore (context);
    }

  return FALSE;
}

static void
gtk_image_reset (GtkImage *image)
{
  GtkImagePrivate *priv = image->priv;

  g_object_freeze_notify (G_OBJECT (image));
  
  if (priv->storage_type != GTK_IMAGE_EMPTY)
    g_object_notify (G_OBJECT (image), "storage-type");

  if (priv->icon_size != DEFAULT_ICON_SIZE)
    {
      priv->icon_size = DEFAULT_ICON_SIZE;
      g_object_notify (G_OBJECT (image), "icon-size");
    }
  
  switch (priv->storage_type)
    {

    case GTK_IMAGE_PIXBUF:

      if (priv->data.pixbuf.pixbuf)
        g_object_unref (priv->data.pixbuf.pixbuf);

      g_object_notify (G_OBJECT (image), "pixbuf");
      
      break;

    case GTK_IMAGE_STOCK:

      g_free (priv->data.stock.stock_id);

      priv->data.stock.stock_id = NULL;
      
      g_object_notify (G_OBJECT (image), "stock");      
      break;

    case GTK_IMAGE_ICON_SET:
      if (priv->data.icon_set.icon_set)
        gtk_icon_set_unref (priv->data.icon_set.icon_set);
      priv->data.icon_set.icon_set = NULL;
      
      g_object_notify (G_OBJECT (image), "icon-set");      
      break;

    case GTK_IMAGE_ANIMATION:
      gtk_image_reset_anim_iter (image);
      
      if (priv->data.anim.anim)
        g_object_unref (priv->data.anim.anim);
      priv->data.anim.anim = NULL;
      
      g_object_notify (G_OBJECT (image), "pixbuf-animation");
      
      break;

    case GTK_IMAGE_ICON_NAME:
      g_free (priv->data.name.icon_name);
      priv->data.name.icon_name = NULL;
      if (priv->data.name.pixbuf)
	g_object_unref (priv->data.name.pixbuf);
      priv->data.name.pixbuf = NULL;

      g_object_notify (G_OBJECT (image), "icon-name");

      break;
      
    case GTK_IMAGE_GICON:
      if (priv->data.gicon.icon)
	g_object_unref (priv->data.gicon.icon);
      priv->data.gicon.icon = NULL;
      if (priv->data.gicon.pixbuf)
	g_object_unref (priv->data.gicon.pixbuf);
      priv->data.gicon.pixbuf = NULL;

      g_object_notify (G_OBJECT (image), "gicon");

      break;
      
    case GTK_IMAGE_EMPTY:
    default:
      break;
      
    }

  if (priv->filename)
    {
      g_free (priv->filename);
      priv->filename = NULL;
      g_object_notify (G_OBJECT (image), "file");
    }

  priv->storage_type = GTK_IMAGE_EMPTY;

  memset (&priv->data, '\0', sizeof (priv->data));

  g_object_thaw_notify (G_OBJECT (image));
}

/**
 * gtk_image_clear:
 * @image: a #GtkImage
 *
 * Resets the image to be empty.
 *
 * Since: 2.8
 */
void
gtk_image_clear (GtkImage *image)
{
  GtkImagePrivate *priv = image->priv;

  priv->need_calc_size = 1;

  gtk_image_reset (image);
  gtk_image_update_size (image, 0, 0);
}

static void
gtk_image_calc_size (GtkImage *image)
{
  GtkWidget *widget = GTK_WIDGET (image);
  GtkImagePrivate *priv = image->priv;
  GdkPixbuf *pixbuf = NULL;
  GtkStyleContext *context;
  GtkStateFlags state;

  priv->need_calc_size = 0;
  context = gtk_widget_get_style_context (widget);

  state = gtk_widget_get_state_flags (widget);
  gtk_style_context_save (context);
  gtk_style_context_set_state (context, state);

  /* We update stock/icon set on every size request, because
   * the theme could have affected the size; for other kinds of
   * image, we just update the required width/height when the image data
   * is set.
   */
  switch (priv->storage_type)
    {
    case GTK_IMAGE_STOCK:
      pixbuf = gtk_widget_render_icon_pixbuf (widget,
                                              priv->data.stock.stock_id,
                                              priv->icon_size);
      break;
      
    case GTK_IMAGE_ICON_SET:
      pixbuf = gtk_icon_set_render_icon_pixbuf (priv->data.icon_set.icon_set,
                                                context, priv->icon_size);
      break;
    case GTK_IMAGE_ICON_NAME:
      ensure_pixbuf_for_icon_name (image, state);
      pixbuf = priv->data.name.pixbuf;
      if (pixbuf) g_object_ref (pixbuf);
      break;
    case GTK_IMAGE_GICON:
      ensure_pixbuf_for_gicon (image, state);
      pixbuf = priv->data.gicon.pixbuf;
      if (pixbuf)
	g_object_ref (pixbuf);
      break;
    default:
      break;
    }

  if (pixbuf)
    {
      gint xpad, ypad;

      gtk_misc_get_padding (GTK_MISC (image), &xpad, &ypad);

      priv->required_width = gdk_pixbuf_get_width (pixbuf) + xpad * 2;
      priv->required_height = gdk_pixbuf_get_height (pixbuf) + ypad * 2;

      g_object_unref (pixbuf);
    }

  gtk_style_context_restore (context);
}

static void
gtk_image_get_preferred_width (GtkWidget *widget,
                               gint      *minimum,
                               gint      *natural)
{
  GtkImage *image;
  GtkImagePrivate *priv;

  image = GTK_IMAGE (widget);
  priv  = image->priv;

  gtk_image_calc_size (image);

  *minimum = *natural = priv->required_width;
}

static void
gtk_image_get_preferred_height (GtkWidget *widget,
                                gint      *minimum,
                                gint      *natural)
{
  GtkImage *image;
  GtkImagePrivate *priv;

  image = GTK_IMAGE (widget);
  priv  = image->priv;

  gtk_image_calc_size (image);

  *minimum = *natural = priv->required_height;
}

static void
gtk_image_style_updated (GtkWidget *widget)
{
  GTK_WIDGET_CLASS (gtk_image_parent_class)->style_updated (widget);

  icon_theme_changed (GTK_IMAGE (widget));
}

static void
gtk_image_screen_changed (GtkWidget *widget,
			  GdkScreen *prev_screen)
{
  GtkImage *image;

  image = GTK_IMAGE (widget);

  if (GTK_WIDGET_CLASS (gtk_image_parent_class)->screen_changed)
    GTK_WIDGET_CLASS (gtk_image_parent_class)->screen_changed (widget, prev_screen);

  icon_theme_changed (image);
}


static void
gtk_image_update_size (GtkImage *image,
                       gint      image_width,
                       gint      image_height)
{
  GtkWidget       *widget = GTK_WIDGET (image);
  GtkImagePrivate *priv = image->priv;
  gint             xpad, ypad;

  gtk_misc_get_padding (GTK_MISC (image), &xpad, &ypad);

  priv->required_width  = image_width + xpad * 2;
  priv->required_height = image_height + ypad * 2;

  if (gtk_widget_get_visible (widget))
    gtk_widget_queue_resize (widget);
}

void
_gtk_image_gicon_data_clear (GtkImageGIconData *data)
{
  if (data->pixbuf)
    {
      g_object_unref (data->pixbuf);
      data->pixbuf = NULL;
    }
  if (data->icon)
    {
      g_object_unref (data->icon);
      data->icon = NULL;
    }
}

/**
 * gtk_image_set_pixel_size:
 * @image: a #GtkImage
 * @pixel_size: the new pixel size
 * 
 * Sets the pixel size to use for named icons. If the pixel size is set
 * to a value != -1, it is used instead of the icon size set by
 * gtk_image_set_from_icon_name().
 *
 * Since: 2.6
 */
void 
gtk_image_set_pixel_size (GtkImage *image,
			  gint      pixel_size)
{
  GtkImagePrivate *priv;

  g_return_if_fail (GTK_IS_IMAGE (image));

  priv = image->priv;

  if (priv->pixel_size != pixel_size)
    {
      priv->pixel_size = pixel_size;
      
      if (priv->storage_type == GTK_IMAGE_ICON_NAME)
	{
	  if (priv->data.name.pixbuf)
	    {
	      g_object_unref (priv->data.name.pixbuf);
	      priv->data.name.pixbuf = NULL;
	    }
	  
	  gtk_image_update_size (image, pixel_size, pixel_size);
	}
      
      if (priv->storage_type == GTK_IMAGE_GICON)
	{
	  if (priv->data.gicon.pixbuf)
	    {
	      g_object_unref (priv->data.gicon.pixbuf);
	      priv->data.gicon.pixbuf = NULL;
	    }
	  
	  gtk_image_update_size (image, pixel_size, pixel_size);
	}
      
      g_object_notify (G_OBJECT (image), "pixel-size");
    }
}

/**
 * gtk_image_get_pixel_size:
 * @image: a #GtkImage
 * 
 * Gets the pixel size used for named icons.
 *
 * Returns: the pixel size used for named icons.
 *
 * Since: 2.6
 */
gint
gtk_image_get_pixel_size (GtkImage *image)
{
  g_return_val_if_fail (GTK_IS_IMAGE (image), -1);

  return image->priv->pixel_size;
}
