/*
 * Copyright (C) 2010  J. Ali Harlow <ali@juiblex.co.uk>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"
#include <stdlib.h>
#ifdef WIN32
#include <windows.h>
#endif	/* WIN32 */
#include <glib.h>
#include <gtk/gtk.h>
#include <plover-gtk/stockicons.h>

/* Checks whether a loader for SVG files has been registered
 * with GdkPixbuf.
 */
static gboolean plover_pixbuf_supports_svg(void)
{
    GSList *formats;
    GSList *tmp_list;
    static gint found_svg=-1;
    gchar **mime_types,**mime_type;
    if (found_svg!=-1)
	return found_svg;
    formats=gdk_pixbuf_get_formats();
    found_svg=FALSE;
    for (tmp_list=formats;tmp_list && !found_svg;tmp_list=tmp_list->next)
    {
	mime_types=gdk_pixbuf_format_get_mime_types(tmp_list->data);
	for (mime_type=mime_types;*mime_type && !found_svg;mime_type++)
	    if (!strcmp(*mime_type,"image/svg"))
		found_svg=TRUE;
	g_strfreev(mime_types);
    }
    g_slist_free(formats);
    return found_svg;
}

static void plover_install_icon_at_size(const char *icon_name,
  GtkIconSet *icon_set,GtkIconSize size,const char *filename)
{
    int w,h;
    GdkPixbuf *pixbuf;
    GtkIconSource *source;
    if (gtk_icon_size_lookup(size,&w,&h))
    {
	pixbuf=gdk_pixbuf_new_from_file_at_size(filename,w,h,NULL);
	if (pixbuf)
	{
	    source=gtk_icon_source_new();
	    gtk_icon_source_set_size_wildcarded(source,FALSE);
	    gtk_icon_source_set_size(source,size);
	    gtk_icon_source_set_pixbuf(source,pixbuf);
	    gtk_icon_set_add_source(icon_set,source);
	    gtk_icon_source_free(source);
	    g_object_unref(pixbuf);
	}
    }
}

/**
 * plover_icons_add_to_stock:
 * @type: The icon type, typically "apps" or "mimetype"
 * @name: The icon name (the basename of files containing the icons)
 *
 * Find icons in <datadir>/icons/hicolor and add them to the stock images
 * so that, for example, gtk_image_new_from_stock() will be able find them.
 *
 * If there is an SVG loader registered with GdkPixbuf, then:
 * <datadir>/icons/hicolor/scalable/@type/@name.svg will be used. Otherwise,
 * <datadir>/icons/hicolor/24x24/@type/@name.png and
 * <datadir>/icons/hicolor/48x48/@type/@name.png will be used.
 */
void plover_icons_add_to_stock(const char *type,const char *name)
{
    gchar *prefix,*s,*filename;
    GtkIconSource *source;
    GtkIconSet *icon_set;
    GtkIconFactory *factory;
    factory=gtk_icon_factory_new();
    icon_set=gtk_icon_set_new();
#ifdef WIN32
    prefix=g_win32_get_package_installation_directory_of_module(NULL);
#else
    prefix=NULL;
#endif
    if (plover_pixbuf_supports_svg())
    {
	source=gtk_icon_source_new();
	s=g_strconcat(name,".svg",NULL);
	filename=g_build_filename(prefix?prefix:"/usr",
	  "share/icons/hicolor/scalable",type,s,NULL);
	g_free(s);
	gtk_icon_source_set_filename(source,filename);
	g_free(filename);
	gtk_icon_set_add_source(icon_set,source);
	gtk_icon_source_free(source);
    }
    else
    {
	s=g_strconcat(name,".png",NULL);
	filename=g_build_filename(prefix?prefix:"/usr",
	  "share/icons/hicolor/24x24",type,s,NULL);
	plover_install_icon_at_size(name,icon_set,GTK_ICON_SIZE_MENU,
	  filename);
	plover_install_icon_at_size(name,icon_set,GTK_ICON_SIZE_BUTTON,
	  filename);
	plover_install_icon_at_size(name,icon_set,GTK_ICON_SIZE_SMALL_TOOLBAR,
	  filename);
	plover_install_icon_at_size(name,icon_set,GTK_ICON_SIZE_LARGE_TOOLBAR,
	  filename);
	g_free(filename);
	filename=g_build_filename(prefix?prefix:"/usr",
	  "share/icons/hicolor/48x48",type,s,NULL);
	plover_install_icon_at_size(name,icon_set,GTK_ICON_SIZE_DND,
	  filename);
	plover_install_icon_at_size(name,icon_set,GTK_ICON_SIZE_DIALOG,
	  filename);
	g_free(filename);
	g_free(s);
    }
    gtk_icon_factory_add(factory,name,icon_set);
    gtk_icon_set_unref(icon_set);
    //icon_set=gtk_icon_factory_lookup(factory,name);
    gtk_icon_factory_add_default(factory);
    g_object_unref(factory);
}