forked from AuroraMiddleware/gtk
adb7676fc1
We should really avoid this needless duplication - the 'state' is never stored anywhere.
662 lines
21 KiB
C
662 lines
21 KiB
C
/* gtkatspiroot.c: AT-SPI root object
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*
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* Copyright 2020 GNOME Foundation
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtkatspirootprivate.h"
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#include "gtkatspicontextprivate.h"
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#include "gtkaccessibleprivate.h"
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#include "gtkatspiprivate.h"
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#include "gtkatspiutilsprivate.h"
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#include "gtkdebug.h"
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#include "gtkwindow.h"
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#include "a11y/atspi/atspi-accessible.h"
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#include "a11y/atspi/atspi-application.h"
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#include <locale.h>
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#include <glib/gi18n-lib.h>
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#include <gio/gio.h>
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#define ATSPI_VERSION "2.1"
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#define ATSPI_PATH_PREFIX "/org/a11y/atspi"
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#define ATSPI_ROOT_PATH ATSPI_PATH_PREFIX "/accessible/root"
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#define ATSPI_CACHE_PATH ATSPI_PATH_PREFIX "/cache"
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struct _GtkAtSpiRoot
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{
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GObject parent_instance;
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char *bus_address;
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GDBusConnection *connection;
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const char *root_path;
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const char *toolkit_name;
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const char *version;
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const char *atspi_version;
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char *desktop_name;
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char *desktop_path;
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gint32 application_id;
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GtkAtSpiCache *cache;
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GListModel *toplevels;
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};
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enum
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{
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PROP_BUS_ADDRESS = 1,
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N_PROPS
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};
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static GParamSpec *obj_props[N_PROPS];
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G_DEFINE_TYPE (GtkAtSpiRoot, gtk_at_spi_root, G_TYPE_OBJECT)
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static void
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gtk_at_spi_root_finalize (GObject *gobject)
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{
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GtkAtSpiRoot *self = GTK_AT_SPI_ROOT (gobject);
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g_free (self->bus_address);
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g_free (self->desktop_name);
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g_free (self->desktop_path);
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G_OBJECT_CLASS (gtk_at_spi_root_parent_class)->dispose (gobject);
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}
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static void
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gtk_at_spi_root_dispose (GObject *gobject)
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{
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GtkAtSpiRoot *self = GTK_AT_SPI_ROOT (gobject);
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g_clear_object (&self->cache);
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g_clear_object (&self->connection);
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G_OBJECT_CLASS (gtk_at_spi_root_parent_class)->dispose (gobject);
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}
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static void
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gtk_at_spi_root_set_property (GObject *gobject,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GtkAtSpiRoot *self = GTK_AT_SPI_ROOT (gobject);
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switch (prop_id)
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{
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case PROP_BUS_ADDRESS:
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self->bus_address = g_value_dup_string (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
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}
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}
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static void
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gtk_at_spi_root_get_property (GObject *gobject,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkAtSpiRoot *self = GTK_AT_SPI_ROOT (gobject);
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switch (prop_id)
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{
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case PROP_BUS_ADDRESS:
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g_value_set_string (value, self->bus_address);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
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}
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}
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static void
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handle_application_method (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *method_name,
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GVariant *parameters,
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GDBusMethodInvocation *invocation,
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gpointer user_data)
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{
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if (g_strcmp0 (method_name, "GetLocale") == 0)
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{
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guint lctype;
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const char *locale;
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int types[] = {
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LC_MESSAGES, LC_COLLATE, LC_CTYPE, LC_MONETARY, LC_NUMERIC, LC_TIME
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};
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g_variant_get (parameters, "(u)", &lctype);
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if (lctype >= G_N_ELEMENTS (types))
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{
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g_dbus_method_invocation_return_error (invocation,
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G_IO_ERROR,
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G_IO_ERROR_INVALID_ARGUMENT,
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"Not a known locale facet: %u", lctype);
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return;
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}
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locale = setlocale (types[lctype], NULL);
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g_dbus_method_invocation_return_value (invocation, g_variant_new ("(s)", locale));
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}
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}
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static GVariant *
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handle_application_get_property (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *property_name,
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GError **error,
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gpointer user_data)
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{
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GtkAtSpiRoot *self = user_data;
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GVariant *res = NULL;
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if (g_strcmp0 (property_name, "Id") == 0)
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res = g_variant_new_int32 (self->application_id);
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else if (g_strcmp0 (property_name, "ToolkitName") == 0)
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res = g_variant_new_string (self->toolkit_name);
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else if (g_strcmp0 (property_name, "Version") == 0)
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res = g_variant_new_string (self->version);
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else if (g_strcmp0 (property_name, "AtspiVersion") == 0)
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res = g_variant_new_string (self->atspi_version);
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else
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
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"Unknown property '%s'", property_name);
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return res;
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}
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static gboolean
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handle_application_set_property (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *property_name,
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GVariant *value,
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GError **error,
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gpointer user_data)
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{
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GtkAtSpiRoot *self = user_data;
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if (g_strcmp0 (property_name, "Id") == 0)
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{
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g_variant_get (value, "i", &(self->application_id));
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}
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else
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{
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
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"Invalid property '%s'", property_name);
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return FALSE;
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}
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return TRUE;
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}
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static void
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handle_accessible_method (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *method_name,
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GVariant *parameters,
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GDBusMethodInvocation *invocation,
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gpointer user_data)
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{
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GtkAtSpiRoot *self = user_data;
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if (g_strcmp0 (method_name, "GetRole") == 0)
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g_dbus_method_invocation_return_value (invocation, g_variant_new ("(u)", ATSPI_ROLE_APPLICATION));
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else if (g_strcmp0 (method_name, "GetRoleName") == 0)
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g_dbus_method_invocation_return_value (invocation, g_variant_new ("(s)", "application"));
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else if (g_strcmp0 (method_name, "GetLocalizedRoleName") == 0)
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g_dbus_method_invocation_return_value (invocation, g_variant_new ("(s)", C_("accessibility", "application")));
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else if (g_strcmp0 (method_name, "GetState") == 0)
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{
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GVariantBuilder builder = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("(au)"));
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g_variant_builder_open (&builder, G_VARIANT_TYPE ("au"));
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g_variant_builder_add (&builder, "u", 0);
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g_variant_builder_add (&builder, "u", 0);
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g_variant_builder_close (&builder);
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g_dbus_method_invocation_return_value (invocation, g_variant_builder_end (&builder));
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}
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else if (g_strcmp0 (method_name, "GetAttributes") == 0)
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{
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GVariantBuilder builder = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("(a{ss})"));
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g_variant_builder_open (&builder, G_VARIANT_TYPE ("a{ss}"));
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g_variant_builder_add (&builder, "{ss}", "toolkit", "GTK");
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g_variant_builder_close (&builder);
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g_dbus_method_invocation_return_value (invocation, g_variant_builder_end (&builder));
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}
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else if (g_strcmp0 (method_name, "GetApplication") == 0)
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{
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g_dbus_method_invocation_return_value (invocation,
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g_variant_new ("((so))",
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self->desktop_name,
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self->desktop_path));
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}
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else if (g_strcmp0 (method_name, "GetChildAtIndex") == 0)
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{
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int idx, real_idx = 0;
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g_variant_get (parameters, "(i)", &idx);
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GtkWidget *window = NULL;
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guint n_toplevels = g_list_model_get_n_items (self->toplevels);
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for (guint i = 0; i < n_toplevels; i++)
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{
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window = g_list_model_get_item (self->toplevels, i);
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g_object_unref (window);
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if (!gtk_widget_get_visible (window))
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continue;
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if (real_idx == idx)
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break;
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real_idx += 1;
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}
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if (window == NULL)
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return;
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GtkATContext *context = gtk_accessible_get_at_context (GTK_ACCESSIBLE (window));
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const char *name = g_dbus_connection_get_unique_name (self->connection);
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const char *path = gtk_at_spi_context_get_context_path (GTK_AT_SPI_CONTEXT (context));
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g_dbus_method_invocation_return_value (invocation, g_variant_new ("((so))", name, path));
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}
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else if (g_strcmp0 (method_name, "GetChildren") == 0)
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{
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GVariantBuilder builder = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("a(so)"));
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guint n_toplevels = g_list_model_get_n_items (self->toplevels);
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for (guint i = 0; i < n_toplevels; i++)
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{
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GtkWidget *window = g_list_model_get_item (self->toplevels, i);
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g_object_unref (window);
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if (!gtk_widget_get_visible (window))
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continue;
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GtkATContext *context = gtk_accessible_get_at_context (GTK_ACCESSIBLE (window));
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const char *name = g_dbus_connection_get_unique_name (self->connection);
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const char *path = gtk_at_spi_context_get_context_path (GTK_AT_SPI_CONTEXT (context));
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g_variant_builder_add (&builder, "(so)", name, path);
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}
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g_dbus_method_invocation_return_value (invocation, g_variant_new ("(a(so))", &builder));
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}
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else if (g_strcmp0 (method_name, "GetIndexInParent") == 0)
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{
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g_dbus_method_invocation_return_value (invocation, g_variant_new ("(i)", -1));
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}
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else if (g_strcmp0 (method_name, "GetRelationSet") == 0)
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{
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GVariantBuilder builder = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("a(ua(so))"));
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g_dbus_method_invocation_return_value (invocation, g_variant_new ("(a(ua(so)))", &builder));
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}
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else if (g_strcmp0 (method_name, "GetInterfaces") == 0)
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{
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GVariantBuilder builder = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("as"));
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g_variant_builder_add (&builder, "s", "org.a11y.atspi.Accessible");
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g_variant_builder_add (&builder, "s", "org.a11y.atspi.Application");
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g_dbus_method_invocation_return_value (invocation, g_variant_new ("(as)", &builder));
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}
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}
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static GVariant *
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handle_accessible_get_property (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *property_name,
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GError **error,
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gpointer user_data)
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{
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GtkAtSpiRoot *self = user_data;
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GVariant *res = NULL;
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if (g_strcmp0 (property_name, "Name") == 0)
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res = g_variant_new_string (g_get_prgname () ? g_get_prgname () : "Unnamed");
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else if (g_strcmp0 (property_name, "Description") == 0)
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res = g_variant_new_string (g_get_application_name () ? g_get_application_name () : "No description");
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else if (g_strcmp0 (property_name, "Locale") == 0)
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res = g_variant_new_string (setlocale (LC_MESSAGES, NULL));
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else if (g_strcmp0 (property_name, "AccessibleId") == 0)
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res = g_variant_new_string ("");
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else if (g_strcmp0 (property_name, "Parent") == 0)
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res = g_variant_new ("(so)", self->desktop_name, self->desktop_path);
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else if (g_strcmp0 (property_name, "ChildCount") == 0)
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{
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guint n_toplevels = g_list_model_get_n_items (self->toplevels);
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int n_children = 0;
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for (guint i = 0; i < n_toplevels; i++)
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{
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GtkWidget *window = g_list_model_get_item (self->toplevels, i);
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if (gtk_widget_get_visible (window))
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n_children += 1;
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g_object_unref (window);
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}
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res = g_variant_new_int32 (n_children);
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}
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else
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
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"Unknown property '%s'", property_name);
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return res;
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}
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static const GDBusInterfaceVTable root_application_vtable = {
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handle_application_method,
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handle_application_get_property,
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handle_application_set_property,
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};
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static const GDBusInterfaceVTable root_accessible_vtable = {
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handle_accessible_method,
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handle_accessible_get_property,
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NULL,
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};
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void
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gtk_at_spi_root_child_changed (GtkAtSpiRoot *self,
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GtkAccessibleChildChange change,
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GtkAccessible *child)
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{
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guint n, i;
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int idx = 0;
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GVariant *window_ref;
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GtkAccessibleChildState state;
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if (!self->toplevels)
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return;
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for (i = 0, n = g_list_model_get_n_items (self->toplevels); i < n; i++)
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{
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GtkAccessible *item = g_list_model_get_item (self->toplevels, i);
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g_object_unref (item);
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if (item == child)
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break;
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if (!gtk_accessible_should_present (item))
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continue;
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idx++;
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}
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if (child == NULL)
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{
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window_ref = gtk_at_spi_null_ref ();
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}
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else
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{
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GtkATContext *context = gtk_accessible_get_at_context (child);
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window_ref = gtk_at_spi_context_to_ref (GTK_AT_SPI_CONTEXT (context));
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}
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switch (change)
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{
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case GTK_ACCESSIBLE_CHILD_CHANGE_ADDED:
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state = GTK_ACCESSIBLE_CHILD_STATE_ADDED;
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break;
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case GTK_ACCESSIBLE_CHILD_CHANGE_REMOVED:
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state = GTK_ACCESSIBLE_CHILD_STATE_REMOVED;
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break;
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default:
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g_assert_not_reached ();
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}
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gtk_at_spi_emit_children_changed (self->connection,
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self->root_path,
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state,
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idx,
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gtk_at_spi_root_to_ref (self),
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window_ref);
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}
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static void
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on_registration_reply (GObject *gobject,
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GAsyncResult *result,
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gpointer user_data)
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{
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GtkAtSpiRoot *self = user_data;
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GError *error = NULL;
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GVariant *reply = g_dbus_connection_call_finish (G_DBUS_CONNECTION (gobject), result, &error);
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if (error != NULL)
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{
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g_critical ("Unable to register the application: %s", error->message);
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g_error_free (error);
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return;
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}
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if (reply != NULL)
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{
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g_variant_get (reply, "((so))",
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&self->desktop_name,
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&self->desktop_path);
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g_variant_unref (reply);
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GTK_NOTE (A11Y, g_message ("Connected to the a11y registry at (%s, %s)",
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self->desktop_name,
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self->desktop_path));
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}
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/* Register the cache object */
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self->cache = gtk_at_spi_cache_new (self->connection, ATSPI_CACHE_PATH);
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self->toplevels = gtk_window_get_toplevels ();
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}
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static void
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gtk_at_spi_root_register (GtkAtSpiRoot *self)
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{
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/* Register the root element; every application has a single root, so we only
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* need to do this once.
|
|
*
|
|
* The root element is used to advertise our existence on the accessibility
|
|
* bus, and it's the entry point to the accessible objects tree.
|
|
*
|
|
* The announcement is split into two phases:
|
|
*
|
|
* 1. we register the org.a11y.atspi.Application and org.a11y.atspi.Accessible
|
|
* interfaces at the well-known object path
|
|
* 2. we invoke the org.a11y.atspi.Socket.Embed method with the connection's
|
|
* unique name and the object path
|
|
* 3. the ATSPI registry daemon will set the org.a11y.atspi.Application.Id
|
|
* property on the given object path
|
|
* 4. the registration concludes when the Embed method returns us the desktop
|
|
* name and object path
|
|
*/
|
|
self->toolkit_name = "GTK";
|
|
self->version = PACKAGE_VERSION;
|
|
self->atspi_version = ATSPI_VERSION;
|
|
self->root_path = ATSPI_ROOT_PATH;
|
|
|
|
g_dbus_connection_register_object (self->connection,
|
|
self->root_path,
|
|
(GDBusInterfaceInfo *) &atspi_application_interface,
|
|
&root_application_vtable,
|
|
self,
|
|
NULL,
|
|
NULL);
|
|
g_dbus_connection_register_object (self->connection,
|
|
self->root_path,
|
|
(GDBusInterfaceInfo *) &atspi_accessible_interface,
|
|
&root_accessible_vtable,
|
|
self,
|
|
NULL,
|
|
NULL);
|
|
|
|
GTK_NOTE (A11Y, g_message ("Registering (%s, %s) on the a11y bus",
|
|
g_dbus_connection_get_unique_name (self->connection),
|
|
self->root_path));
|
|
|
|
g_dbus_connection_call (self->connection,
|
|
"org.a11y.atspi.Registry",
|
|
ATSPI_ROOT_PATH,
|
|
"org.a11y.atspi.Socket",
|
|
"Embed",
|
|
g_variant_new ("((so))",
|
|
g_dbus_connection_get_unique_name (self->connection),
|
|
self->root_path
|
|
),
|
|
G_VARIANT_TYPE ("((so))"),
|
|
G_DBUS_CALL_FLAGS_NONE, -1,
|
|
NULL,
|
|
on_registration_reply,
|
|
self);
|
|
}
|
|
|
|
static void
|
|
gtk_at_spi_root_constructed (GObject *gobject)
|
|
{
|
|
GtkAtSpiRoot *self = GTK_AT_SPI_ROOT (gobject);
|
|
|
|
GError *error = NULL;
|
|
|
|
/* The accessibility bus is a fully managed bus */
|
|
self->connection =
|
|
g_dbus_connection_new_for_address_sync (self->bus_address,
|
|
G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT |
|
|
G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION,
|
|
NULL, NULL,
|
|
&error);
|
|
|
|
if (error != NULL)
|
|
{
|
|
g_critical ("Unable to connect to the accessibility bus at '%s': %s",
|
|
self->bus_address,
|
|
error->message);
|
|
g_error_free (error);
|
|
goto out;
|
|
}
|
|
|
|
gtk_at_spi_root_register (self);
|
|
|
|
out:
|
|
G_OBJECT_CLASS (gtk_at_spi_root_parent_class)->constructed (gobject);
|
|
}
|
|
|
|
static void
|
|
gtk_at_spi_root_class_init (GtkAtSpiRootClass *klass)
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
|
|
gobject_class->constructed = gtk_at_spi_root_constructed;
|
|
gobject_class->set_property = gtk_at_spi_root_set_property;
|
|
gobject_class->get_property = gtk_at_spi_root_get_property;
|
|
gobject_class->dispose = gtk_at_spi_root_dispose;
|
|
gobject_class->finalize = gtk_at_spi_root_finalize;
|
|
|
|
obj_props[PROP_BUS_ADDRESS] =
|
|
g_param_spec_string ("bus-address", NULL, NULL,
|
|
NULL,
|
|
G_PARAM_CONSTRUCT_ONLY |
|
|
G_PARAM_READWRITE |
|
|
G_PARAM_STATIC_STRINGS);
|
|
|
|
g_object_class_install_properties (gobject_class, N_PROPS, obj_props);
|
|
}
|
|
|
|
static void
|
|
gtk_at_spi_root_init (GtkAtSpiRoot *self)
|
|
{
|
|
}
|
|
|
|
GtkAtSpiRoot *
|
|
gtk_at_spi_root_new (const char *bus_address)
|
|
{
|
|
g_return_val_if_fail (bus_address != NULL, NULL);
|
|
|
|
return g_object_new (GTK_TYPE_AT_SPI_ROOT,
|
|
"bus-address", bus_address,
|
|
NULL);
|
|
}
|
|
|
|
GDBusConnection *
|
|
gtk_at_spi_root_get_connection (GtkAtSpiRoot *self)
|
|
{
|
|
g_return_val_if_fail (GTK_IS_AT_SPI_ROOT (self), NULL);
|
|
|
|
return self->connection;
|
|
}
|
|
|
|
GtkAtSpiCache *
|
|
gtk_at_spi_root_get_cache (GtkAtSpiRoot *self)
|
|
{
|
|
g_return_val_if_fail (GTK_IS_AT_SPI_ROOT (self), NULL);
|
|
|
|
return self->cache;
|
|
}
|
|
|
|
/*< private >
|
|
* gtk_at_spi_root_to_ref:
|
|
* @self: a #GtkAtSpiRoot
|
|
*
|
|
* Returns an ATSPI object reference for the #GtkAtSpiRoot node.
|
|
*
|
|
* Returns: (transfer floating): a #GVariant with the root reference
|
|
*/
|
|
GVariant *
|
|
gtk_at_spi_root_to_ref (GtkAtSpiRoot *self)
|
|
{
|
|
g_return_val_if_fail (GTK_IS_AT_SPI_ROOT (self), NULL);
|
|
|
|
if (self->desktop_path == NULL)
|
|
return gtk_at_spi_null_ref ();
|
|
|
|
return g_variant_new ("(so)", self->desktop_name, self->desktop_path);
|
|
}
|