path: root/shell/e-icon-factory.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-icon-factory.c - Icon factory for the Evolution shell.
 *
 * Copyright (C) 2002 Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Author: Ettore Perazzoli <ettore@ximian.com>
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "e-icon-factory.h"

#include "e-shell-constants.h"


/* One icon.  Keep both a small (16x16) and a large (48x48) version around.  */
struct _Icon {
    char *name;
    GdkPixbuf *small_pixbuf;
    GdkPixbuf *large_pixbuf;
};
typedef struct _Icon Icon;

/* Hash of all the icons.  */
static GHashTable *name_to_icon = NULL;


/* Creating and destroying icons.  */

static Icon *
icon_new (const char *name,
      GdkPixbuf *small_pixbuf,
      GdkPixbuf *large_pixbuf)
{
    Icon *icon;

    icon = g_new (Icon, 1);
    icon->name         = g_strdup (name);
    icon->small_pixbuf = small_pixbuf;
    icon->large_pixbuf = large_pixbuf;

    if (small_pixbuf != NULL)
        g_object_ref (small_pixbuf);
    if (large_pixbuf != NULL)
        g_object_ref (large_pixbuf);

    return icon;
}

#if 0

/* (This is not currently used since we never prune icons out of the
   cache.)  */
static void
icon_free (Icon *icon)
{
    g_free (icon->name);

    if (icon->large_pixbuf != NULL)
        g_object_unref (icon->large_pixbuf);
    if (icon->small_pixbuf != NULL)
        g_object_unref (icon->small_pixbuf);

    g_free (icon);
}

#endif


/* Loading icons.  */

static Icon *
load_icon (const char *icon_name)
{
    GdkPixbuf *small_pixbuf;
    GdkPixbuf *large_pixbuf;
    Icon *icon;
    char *path;

    path = g_strconcat (EVOLUTION_IMAGES, "/", icon_name, "-mini.png", NULL);
    small_pixbuf = gdk_pixbuf_new_from_file (path, NULL);
    g_free (path);

    path = g_strconcat (EVOLUTION_IMAGES, "/", icon_name, ".png", NULL);
    large_pixbuf = gdk_pixbuf_new_from_file (path, NULL);
    g_free (path);

    if (large_pixbuf == NULL || small_pixbuf == NULL)
        return NULL;

    icon = icon_new (icon_name, small_pixbuf, large_pixbuf);

    g_object_unref (small_pixbuf);
    g_object_unref (large_pixbuf);

    return icon;
}


/* Public API.  */

void
e_icon_factory_init (void)
{
    if (name_to_icon != NULL) {
        /* Already initialized.  */
        return;
    }

    name_to_icon = g_hash_table_new (g_str_hash, g_str_equal);
}

GdkPixbuf *
e_icon_factory_get_icon (const char *icon_name,
             gboolean mini)
{
    Icon *icon;

    g_return_val_if_fail (icon_name != NULL, NULL);

    icon = g_hash_table_lookup (name_to_icon, icon_name);
    if (icon == NULL) {
        icon = load_icon (icon_name);
        if (icon == NULL) {
            g_warning ("Icon not found -- %s", icon_name);

            /* Create an empty icon so that we don't keep spitting
               out the same warning over and over, every time this
               icon is requested.  */

            icon = icon_new (icon_name, NULL, NULL);
            g_hash_table_insert (name_to_icon, icon->name, icon);
            return NULL;
        }

        g_hash_table_insert (name_to_icon, icon->name, icon);
    }

    if (mini) {
        g_object_ref (icon->small_pixbuf);
        return icon->small_pixbuf;
    } else {
        g_object_ref (icon->large_pixbuf);
        return icon->large_pixbuf;
    }
}