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/* CALLY - The Clutter Accessibility Implementation Library
*
* Copyright (C) 2009 Igalia, S.L.
*
* Author: Alejandro Piñeiro Iglesias <apinheiro@igalia.com>
*
* 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.
*/
#include <gmodule.h>
#include <stdlib.h>
#include <clutter/clutter.h>
#include "cally-examples-util.h"
/* Checking the at-spi sources, the module directory is
* $(libdir)/gtk-2.0/modules
*
* It is supposed cally would be installed on the same libdir.
*
* You could use the option atk-bridge-dir to use other directory.
*/
#define ATK_BRIDGE_DEFAULT_MODULE_DIRECTORY PREFIXDIR"/gtk-2.0/modules"
static gchar *
_search_for_bridge_module (const gchar *module_name)
{
/* We simplify the search for the atk bridge, see see the definition
* of the macro for more information*/
return g_strdup (ATK_BRIDGE_DEFAULT_MODULE_DIRECTORY);
}
static gchar*
_a11y_check_custom_bridge (int *argc,
char ***argv)
{
GError *error = NULL;
GOptionContext *context;
static gchar *bridge_dir = NULL;
static GOptionEntry entries [] =
{
{"atk-bridge-dir", 'd', 0, G_OPTION_ARG_STRING, &bridge_dir, "atk-bridge module directory", NULL}
};
context = g_option_context_new ("- cally examples");
g_option_context_add_main_entries (context, entries, NULL);
if (!g_option_context_parse (context, argc, argv, &error))
{
g_print ("%s\n", error->message);
g_print ("Use --help for more information.\n");
exit (0);
}
return bridge_dir;
}
static gboolean
_a11y_invoke_module (const gchar *module_path,
gboolean init)
{
GModule *handle;
void (*invoke_fn) (void);
const char *method;
if (init)
method = "gnome_accessibility_module_init";
else
method = "gnome_accessibility_module_shutdown";
if (!module_path)
return FALSE;
if (!(handle = g_module_open (module_path, G_MODULE_BIND_LAZY)))
{
g_warning ("Accessibility: failed to load module '%s': '%s'",
module_path, g_module_error ());
return FALSE;
}
if (!g_module_symbol (handle, method, (gpointer *)&invoke_fn))
{
g_warning ("Accessibility: error library '%s' does not include "
"method '%s' required for accessibility support",
module_path, method);
g_module_close (handle);
return FALSE;
}
g_debug ("Module %s loaded successfully", module_path);
invoke_fn ();
return TRUE;
}
/**
* This method will initialize the accessibility support provided by cally.
*
* Basically it will load the cally module using gmodule functions.
*
* Returns if it was able to init the a11y support or not.
*/
gboolean
cally_util_a11y_init (int *argc, char ***argv)
{
gchar *bridge_dir = NULL;
gchar *bridge_path = NULL;
gboolean result = FALSE;
if (clutter_get_accessibility_enabled () == FALSE)
{
g_warning ("Accessibility: clutter has no accessibility enabled"
" skipping the atk-bridge load");
return FALSE;
}
bridge_dir = _a11y_check_custom_bridge (argc, argv);
if (bridge_dir == NULL)
bridge_dir = _search_for_bridge_module ("atk-bridge");
bridge_path = g_module_build_path (bridge_dir, "libatk-bridge");
result = _a11y_invoke_module (bridge_path, TRUE);
g_free (bridge_dir);
g_free (bridge_path);
return result;
}
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