PIKApp/libpikawidgets/pikaicons.c

315 lines
9.1 KiB
C

/* LIBPIKA - The PIKA Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* pikaicons.c
* Copyright (C) 2001-2015 Michael Natterer <mitch@gimp.org>
*
* 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 3 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
* Library 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, see
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "libpikabase/pikabase.h"
#include "pikaicons.h"
#include "libpika/libpika-intl.h"
/**
* SECTION: pikaicons
* @title: PikaIcons
* @short_description: Prebuilt common menu/toolbar items and
* corresponding icons
*
* PIKA registers a set of menu/toolbar items and corresponding icons
* in addition to the standard GTK+ stock items. These can be used
* just like GTK+ stock items. PIKA also overrides a few of the GTK+
* icons (namely the ones in dialog size).
*
* Stock icons may have a RTL variant which gets used for
* right-to-left locales.
**/
#define LIBPIKA_DOMAIN GETTEXT_PACKAGE "-libpika"
#define PIKA_TOILET_PAPER "pika-toilet-paper"
#define PIKA_DEFAULT_ICON_THEME "Symbolic"
static GFile *icon_theme_path = NULL;
static GFile *default_search_path = NULL;
static void
pika_icons_change_icon_theme (GFile *new_search_path)
{
GFile *old_search_path = g_file_get_parent (icon_theme_path);
if (! default_search_path)
default_search_path = pika_data_directory_file ("icons", NULL);
if (! g_file_equal (new_search_path, old_search_path))
{
GtkIconTheme *icon_theme = gtk_icon_theme_get_default ();
if (g_file_equal (old_search_path, default_search_path))
{
/* if the old icon theme is in the default search path,
* simply prepend the new theme's path
*/
gchar *path_str = g_file_get_path (new_search_path);
gtk_icon_theme_prepend_search_path (icon_theme, path_str);
g_free (path_str);
}
else
{
/* if the old theme is not in the default search path,
* we need to deal with the search path's first element
*/
gchar **paths;
gint n_paths;
gtk_icon_theme_get_search_path (icon_theme, &paths, &n_paths);
if (g_file_equal (new_search_path, default_search_path))
{
/* when switching to a theme in the default path, remove
* the first search path element, the default search path
* is still in the search path
*/
gtk_icon_theme_set_search_path (icon_theme,
(const gchar **) paths + 1,
n_paths - 1);
}
else
{
/* when switching between two non-default search paths, replace
* the first element of the search path with the new
* theme's path
*/
g_free (paths[0]);
paths[0] = g_file_get_path (new_search_path);
gtk_icon_theme_set_search_path (icon_theme,
(const gchar **) paths, n_paths);
}
g_strfreev (paths);
}
}
g_object_unref (old_search_path);
}
static void
pika_icons_notify_system_icon_theme (GObject *settings,
GParamSpec *param,
gpointer unused)
{
GdkScreen *screen = gdk_screen_get_default ();
GValue value = G_VALUE_INIT;
g_value_init (&value, G_TYPE_STRING);
if (gdk_screen_get_setting (screen, "gtk-icon-theme-name", &value))
{
const gchar *new_system_icon_theme = g_value_get_string (&value);
gchar *cur_system_icon_theme = NULL;
g_object_get (settings,
"gtk-fallback-icon-theme", &cur_system_icon_theme,
NULL);
if (g_strcmp0 (cur_system_icon_theme, new_system_icon_theme))
{
g_object_set (settings,
"gtk-fallback-icon-theme", new_system_icon_theme,
NULL);
g_object_notify (settings, "gtk-icon-theme-name");
}
g_free (cur_system_icon_theme);
}
g_value_unset (&value);
}
static gboolean
pika_icons_sanity_check (GFile *path,
const gchar *theme_name)
{
gboolean exists = FALSE;
GFile *child = g_file_get_child (path, theme_name);
if (g_file_query_exists (child, NULL))
{
GFile *index = g_file_get_child (child, "index.theme");
if (g_file_query_exists (index, NULL))
exists = TRUE;
else
g_printerr ("%s: Icon theme path has no '%s/index.theme': %s\n",
G_STRFUNC, theme_name, pika_file_get_utf8_name (path));
g_object_unref (index);
}
else
g_printerr ("%s: Icon theme path has no '%s' subdirectory: %s\n",
G_STRFUNC, theme_name, pika_file_get_utf8_name (path));
g_object_unref (child);
return exists;
}
void
pika_icons_set_icon_theme (GFile *path)
{
gchar *icon_theme_name;
GFile *search_path;
g_return_if_fail (path == NULL || G_IS_FILE (path));
if (path)
path = g_object_ref (path);
else
path = pika_data_directory_file ("icons", PIKA_DEFAULT_ICON_THEME, NULL);
search_path = g_file_get_parent (path);
icon_theme_name = g_file_get_basename (path);
if (pika_icons_sanity_check (search_path, "hicolor") &&
pika_icons_sanity_check (search_path, icon_theme_name))
{
if (icon_theme_path)
{
/* this is an icon theme change */
pika_icons_change_icon_theme (search_path);
if (! g_file_equal (icon_theme_path, path))
{
g_object_unref (icon_theme_path);
icon_theme_path = g_object_ref (path);
}
g_object_set (gtk_settings_get_for_screen (gdk_screen_get_default ()),
"gtk-icon-theme-name", icon_theme_name,
NULL);
}
else
{
/* this is the first call upon initialization */
icon_theme_path = g_object_ref (path);
}
}
g_free (icon_theme_name);
g_object_unref (search_path);
g_object_unref (path);
}
/**
* pika_icons_init:
*
* Initializes the PIKA stock icon factory.
*
* You don't need to call this function as pika_ui_init() already does
* this for you.
*/
void
pika_icons_init (void)
{
static gboolean initialized = FALSE;
GtkSettings *settings;
GdkPixbuf *pixbuf;
GError *error = NULL;
gchar *icons_dir;
gchar *system_icon_theme;
gchar *pika_icon_theme;
if (initialized)
return;
/* always prepend the default icon theme, it's never removed from
* the path again and acts as fallback for missing icons in other
* themes.
*/
if (! default_search_path)
default_search_path = pika_data_directory_file ("icons",
NULL);
icons_dir = g_file_get_path (default_search_path);
gtk_icon_theme_prepend_search_path (gtk_icon_theme_get_default (),
icons_dir);
g_free (icons_dir);
/* if an icon theme was chosen before init(), change to it */
if (icon_theme_path)
{
GFile *search_path = g_file_get_parent (icon_theme_path);
if (!g_file_equal (search_path, default_search_path))
{
gchar *icon_dir = g_file_get_path (search_path);
gtk_icon_theme_prepend_search_path (gtk_icon_theme_get_default (),
icon_dir);
g_free (icon_dir);
}
g_object_unref (search_path);
pika_icon_theme = g_file_get_basename (icon_theme_path);
}
else
{
pika_icon_theme = g_strdup (PIKA_DEFAULT_ICON_THEME);
}
settings = gtk_settings_get_for_screen (gdk_screen_get_default ());
g_object_get (settings, "gtk-icon-theme-name", &system_icon_theme, NULL);
g_object_set (settings,
"gtk-fallback-icon-theme", system_icon_theme,
"gtk-icon-theme-name", pika_icon_theme,
NULL);
g_free (pika_icon_theme);
g_free (system_icon_theme);
g_signal_connect (settings, "notify::gtk-icon-theme-name",
G_CALLBACK (pika_icons_notify_system_icon_theme), NULL);
pixbuf = gdk_pixbuf_new_from_resource ("/technology.heckin/icons/64/pika-mascot-eek.png",
&error);
if (pixbuf)
{
gtk_icon_theme_add_builtin_icon (PIKA_ICON_MASCOT_EEK, 64, pixbuf);
g_object_unref (pixbuf);
}
else
{
g_critical ("Failed to create icon image: %s", error->message);
g_clear_error (&error);
}
initialized = TRUE;
}