/*

 * 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 (g_getenv("PLOVER_IGNORE_SVG_SUPPORT"))

	return FALSE;

    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;

    GtkSettings *settings;

    GtkIconSource *source;

    GError *err=NULL;

    settings=gtk_settings_get_default();

    if (!settings)

	g_warning("plover: Can't add icons without a default screen");

    else if (gtk_icon_size_lookup_for_settings(settings,size,&w,&h))

    {

	pixbuf=gdk_pixbuf_new_from_file_at_size(filename,w,h,&err);

	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);

	}

	else

	{

	    g_warning("%s: %s",filename,err->message);

	    g_error_free(err);

	}

    }

}

/**

 * 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 *datadir,*prefix,*s,*filename;

    GtkIconSource *source;

    GtkIconSet *icon_set;

    GtkIconFactory *factory;

    factory=gtk_icon_factory_new();

    icon_set=gtk_icon_set_new();

    datadir=g_strdup(g_getenv("PLOVER_ICONS_DATADIR"));

    if (!datadir)

    {

#ifdef WIN32

	prefix=g_win32_get_package_installation_directory_of_module(NULL);

#else

	prefix=NULL;

#endif

	if (!prefix)

	    prefix=g_strdup("/usr");

	datadir=g_strconcat(prefix,"share",NULL);

	g_free(prefix);

    }

    if (plover_pixbuf_supports_svg())

    {

	source=gtk_icon_source_new();

	s=g_strconcat(name,".svg",NULL);

	filename=g_build_filename(datadir,"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(datadir,"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(datadir,"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);

    }

    g_free(datadir);

    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);

}