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2546b88661
gtk2/gtk/a11y/gtkatspicontext.c
Matthias Clasen 2546b88661 a11y: Redo child-added/-removed for toplevels 
Instead of monitoring the list of toplevels, rely
on GtkWindow updating the HIDDEN state before windows
get removed. This is better, since we still have the
object available when it happens, so we can pass it
to the ATs.
2020-10-24 15:26:12 -04:00

1708 lines
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/* gtkatspicontext.c: AT-SPI GtkATContext implementation
*
* Copyright 2020 GNOME Foundation
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* 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 2.1 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkatspicontextprivate.h"
#include "gtkaccessibleprivate.h"
#include "gtkatspiactionprivate.h"
#include "gtkatspicacheprivate.h"
#include "gtkatspieditabletextprivate.h"
#include "gtkatspiprivate.h"
#include "gtkatspirootprivate.h"
#include "gtkatspiselectionprivate.h"
#include "gtkatspitextprivate.h"
#include "gtkatspiutilsprivate.h"
#include "gtkatspivalueprivate.h"
#include "gtkatspicomponentprivate.h"
#include "a11y/atspi/atspi-accessible.h"
#include "a11y/atspi/atspi-action.h"
#include "a11y/atspi/atspi-editabletext.h"
#include "a11y/atspi/atspi-text.h"
#include "a11y/atspi/atspi-value.h"
#include "a11y/atspi/atspi-selection.h"
#include "a11y/atspi/atspi-component.h"
#include "gtkdebug.h"
#include "gtkeditable.h"
#include "gtkentryprivate.h"
#include "gtkroot.h"
#include "gtktextview.h"
#include "gtkwindow.h"
#include "gtkstack.h"
#include <gio/gio.h>
#include <locale.h>
#if defined(GDK_WINDOWING_WAYLAND)
# include <gdk/wayland/gdkwaylanddisplay.h>
#endif
#if defined(GDK_WINDOWING_X11)
# include <gdk/x11/gdkx11display.h>
# include <gdk/x11/gdkx11property.h>
#endif
/* We create a GtkAtSpiContext object for (almost) every widget.
*
* Each context implements a number of Atspi interfaces on a D-Bus
* object. The context objects are connected into a tree by the
* Parent property and GetChildAtIndex method of the Accessible
* interface.
*
* The tree is an almost perfect mirror image of the widget tree,
* with a few notable exceptions:
*
* - We don't create contexts for the GtkText widgets inside
* entry wrappers, since the Text functionality is represented
* on the entry contexts.
*
* - We insert non-widget backed context objects for each page
* of a stack. The main purpose of these extra context is to
* hold the TAB_PANEL role and be the target of the CONTROLS
* relation with their corresponding tabs (in the stack
* switcher or notebook).
*/
struct _GtkAtSpiContext
{
GtkATContext parent_instance;
/* The root object, used as a entry point */
GtkAtSpiRoot *root;
/* The cache object, used to retrieve ATContexts */
GtkAtSpiCache *cache;
/* The address for the ATSPI accessibility bus */
char *bus_address;
/* The object path of the ATContext on the bus */
char *context_path;
/* Just a pointer; the connection is owned by the GtkAtSpiRoot
* associated to the GtkATContext
*/
GDBusConnection *connection;
/* Accerciser refuses to work unless we implement a GetInterface
* call that returns a list of all implemented interfaces. We
* collect the answer here.
*/
GVariant *interfaces;
guint registration_ids[20];
guint n_registered_objects;
};
enum
{
PROP_BUS_ADDRESS = 1,
N_PROPS
};
static GParamSpec *obj_props[N_PROPS];
G_DEFINE_TYPE (GtkAtSpiContext, gtk_at_spi_context, GTK_TYPE_AT_CONTEXT)
/* {{{ State handling */
static void
set_atspi_state (guint64 *states,
AtspiStateType state)
{
*states |= (G_GUINT64_CONSTANT (1) << state);
}
static void
unset_atspi_state (guint64 *states,
AtspiStateType state)
{
*states &= ~(G_GUINT64_CONSTANT (1) << state);
}
static void
collect_states (GtkAtSpiContext *self,
GVariantBuilder *builder)
{
GtkATContext *ctx = GTK_AT_CONTEXT (self);
GtkAccessibleValue *value;
GtkAccessible *accessible;
guint64 states = 0;
accessible = gtk_at_context_get_accessible (ctx);
set_atspi_state (&states, ATSPI_STATE_VISIBLE);
if (ctx->accessible_role == GTK_ACCESSIBLE_ROLE_TEXT_BOX ||
ctx->accessible_role == GTK_ACCESSIBLE_ROLE_SEARCH_BOX ||
ctx->accessible_role == GTK_ACCESSIBLE_ROLE_SPIN_BUTTON)
set_atspi_state (&states, ATSPI_STATE_EDITABLE);
if (gtk_at_context_has_accessible_property (ctx, GTK_ACCESSIBLE_PROPERTY_READ_ONLY))
{
value = gtk_at_context_get_accessible_property (ctx, GTK_ACCESSIBLE_PROPERTY_READ_ONLY);
if (gtk_boolean_accessible_value_get (value))
{
set_atspi_state (&states, ATSPI_STATE_READ_ONLY);
unset_atspi_state (&states, ATSPI_STATE_EDITABLE);
}
}
if (gtk_accessible_get_platform_state (accessible, GTK_ACCESSIBLE_PLATFORM_STATE_FOCUSABLE))
set_atspi_state (&states, ATSPI_STATE_FOCUSABLE);
if (gtk_accessible_get_platform_state (accessible, GTK_ACCESSIBLE_PLATFORM_STATE_FOCUSED))
set_atspi_state (&states, ATSPI_STATE_FOCUSED);
if (gtk_at_context_has_accessible_property (ctx, GTK_ACCESSIBLE_PROPERTY_ORIENTATION))
{
value = gtk_at_context_get_accessible_property (ctx, GTK_ACCESSIBLE_PROPERTY_ORIENTATION);
if (gtk_orientation_accessible_value_get (value) == GTK_ORIENTATION_HORIZONTAL)
set_atspi_state (&states, ATSPI_STATE_HORIZONTAL);
else
set_atspi_state (&states, ATSPI_STATE_VERTICAL);
}
if (gtk_at_context_has_accessible_property (ctx, GTK_ACCESSIBLE_PROPERTY_MODAL))
{
value = gtk_at_context_get_accessible_property (ctx, GTK_ACCESSIBLE_PROPERTY_MODAL);
if (gtk_boolean_accessible_value_get (value))
set_atspi_state (&states, ATSPI_STATE_MODAL);
}
if (gtk_at_context_has_accessible_property (ctx, GTK_ACCESSIBLE_PROPERTY_MULTI_LINE))
{
value = gtk_at_context_get_accessible_property (ctx, GTK_ACCESSIBLE_PROPERTY_MULTI_LINE);
if (gtk_boolean_accessible_value_get (value))
set_atspi_state (&states, ATSPI_STATE_MULTI_LINE);
}
if (gtk_at_context_has_accessible_state (ctx, GTK_ACCESSIBLE_STATE_BUSY))
{
value = gtk_at_context_get_accessible_state (ctx, GTK_ACCESSIBLE_STATE_BUSY);
if (gtk_boolean_accessible_value_get (value))
set_atspi_state (&states, ATSPI_STATE_BUSY);
}
if (gtk_at_context_has_accessible_state (ctx, GTK_ACCESSIBLE_STATE_CHECKED))
{
value = gtk_at_context_get_accessible_state (ctx, GTK_ACCESSIBLE_STATE_CHECKED);
switch (gtk_tristate_accessible_value_get (value))
{
case GTK_ACCESSIBLE_TRISTATE_TRUE:
set_atspi_state (&states, ATSPI_STATE_CHECKED);
break;
case GTK_ACCESSIBLE_TRISTATE_MIXED:
set_atspi_state (&states, ATSPI_STATE_INDETERMINATE);
break;
case GTK_ACCESSIBLE_TRISTATE_FALSE:
default:
break;
}
}
if (gtk_at_context_has_accessible_state (ctx, GTK_ACCESSIBLE_STATE_DISABLED))
{
value = gtk_at_context_get_accessible_state (ctx, GTK_ACCESSIBLE_STATE_DISABLED);
if (!gtk_boolean_accessible_value_get (value))
set_atspi_state (&states, ATSPI_STATE_SENSITIVE);
}
else
set_atspi_state (&states, ATSPI_STATE_SENSITIVE);
if (gtk_at_context_has_accessible_state (ctx, GTK_ACCESSIBLE_STATE_EXPANDED))
{
value = gtk_at_context_get_accessible_state (ctx, GTK_ACCESSIBLE_STATE_EXPANDED);
if (value->value_class->type == GTK_ACCESSIBLE_VALUE_TYPE_BOOLEAN)
{
set_atspi_state (&states, ATSPI_STATE_EXPANDABLE);
if (gtk_boolean_accessible_value_get (value))
set_atspi_state (&states, ATSPI_STATE_EXPANDED);
}
}
if (gtk_at_context_has_accessible_state (ctx, GTK_ACCESSIBLE_STATE_INVALID))
{
value = gtk_at_context_get_accessible_state (ctx, GTK_ACCESSIBLE_STATE_INVALID);
switch (gtk_invalid_accessible_value_get (value))
{
case GTK_ACCESSIBLE_INVALID_TRUE:
case GTK_ACCESSIBLE_INVALID_GRAMMAR:
case GTK_ACCESSIBLE_INVALID_SPELLING:
set_atspi_state (&states, ATSPI_STATE_INVALID);
break;
case GTK_ACCESSIBLE_INVALID_FALSE:
default:
break;
}
}
if (gtk_at_context_has_accessible_state (ctx, GTK_ACCESSIBLE_STATE_PRESSED))
{
value = gtk_at_context_get_accessible_state (ctx, GTK_ACCESSIBLE_STATE_PRESSED);
switch (gtk_tristate_accessible_value_get (value))
{
case GTK_ACCESSIBLE_TRISTATE_TRUE:
set_atspi_state (&states, ATSPI_STATE_PRESSED);
break;
case GTK_ACCESSIBLE_TRISTATE_MIXED:
set_atspi_state (&states, ATSPI_STATE_INDETERMINATE);
break;
case GTK_ACCESSIBLE_TRISTATE_FALSE:
default:
break;
}
}
if (gtk_at_context_has_accessible_state (ctx, GTK_ACCESSIBLE_STATE_SELECTED))
{
value = gtk_at_context_get_accessible_state (ctx, GTK_ACCESSIBLE_STATE_SELECTED);
if (value->value_class->type == GTK_ACCESSIBLE_VALUE_TYPE_BOOLEAN)
{
set_atspi_state (&states, ATSPI_STATE_SELECTABLE);
if (gtk_boolean_accessible_value_get (value))
set_atspi_state (&states, ATSPI_STATE_SELECTED);
}
}
g_variant_builder_add (builder, "u", (guint32) (states & 0xffffffff));
g_variant_builder_add (builder, "u", (guint32) (states >> 32));
}
/* }}} */
/* {{{ Relation handling */
static void
collect_relations (GtkAtSpiContext *self,
GVariantBuilder *builder)
{
GtkATContext *ctx = GTK_AT_CONTEXT (self);
struct {
GtkAccessibleRelation r;
AtspiRelationType s;
} map[] = {
{ GTK_ACCESSIBLE_RELATION_LABELLED_BY, ATSPI_RELATION_LABELLED_BY },
{ GTK_ACCESSIBLE_RELATION_CONTROLS, ATSPI_RELATION_CONTROLLER_FOR },
{ GTK_ACCESSIBLE_RELATION_DESCRIBED_BY, ATSPI_RELATION_DESCRIBED_BY },
{ GTK_ACCESSIBLE_RELATION_FLOW_TO, ATSPI_RELATION_FLOWS_TO},
};
GtkAccessibleValue *value;
GList *list, *l;
GtkATContext *target_ctx;
const char *unique_name;
int i;
unique_name = g_dbus_connection_get_unique_name (self->connection);
for (i = 0; i < G_N_ELEMENTS (map); i++)
{
if (!gtk_at_context_has_accessible_relation (ctx, map[i].r))
continue;
GVariantBuilder b = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("a(so)"));
value = gtk_at_context_get_accessible_relation (ctx, map[i].r);
list = gtk_reference_list_accessible_value_get (value);
for (l = list; l; l = l->next)
{
target_ctx = gtk_accessible_get_at_context (GTK_ACCESSIBLE (l->data));
g_variant_builder_add (&b, "(so)",
unique_name,
GTK_AT_SPI_CONTEXT (target_ctx)->context_path);
}
g_variant_builder_add (builder, "(ua(so))", map[i].s, &b);
}
}
/* }}} */
/* {{{ Accessible implementation */
static int
get_index_in_parent (GtkWidget *widget)
{
GtkWidget *parent = gtk_widget_get_parent (widget);
GtkWidget *child;
int idx;
idx = 0;
for (child = gtk_widget_get_first_child (parent);
child;
child = gtk_widget_get_next_sibling (child))
{
if (child == widget)
return idx;
if (!gtk_accessible_should_present (GTK_ACCESSIBLE (child)))
continue;
idx++;
}
return -1;
}
static int
get_index_in_toplevels (GtkWidget *widget)
{
GListModel *toplevels = gtk_window_get_toplevels ();
guint n_toplevels = g_list_model_get_n_items (toplevels);
GtkWidget *window;
int idx;
idx = 0;
for (guint i = 0; i < n_toplevels; i++)
{
window = g_list_model_get_item (toplevels, i);
g_object_unref (window);
if (window == widget)
return idx;
if (!gtk_accessible_should_present (GTK_ACCESSIBLE (window)))
continue;
idx += 1;
}
return -1;
}
static void
handle_accessible_method (GDBusConnection *connection,
const gchar *sender,
const gchar *object_path,
const gchar *interface_name,
const gchar *method_name,
GVariant *parameters,
GDBusMethodInvocation *invocation,
gpointer user_data)
{
GtkAtSpiContext *self = user_data;
if (g_strcmp0 (method_name, "GetRole") == 0)
{
guint atspi_role = gtk_atspi_role_for_context (GTK_AT_CONTEXT (self));
g_dbus_method_invocation_return_value (invocation, g_variant_new ("(u)", atspi_role));
}
else if (g_strcmp0 (method_name, "GetRoleName") == 0)
{
GtkAccessibleRole role = gtk_at_context_get_accessible_role (GTK_AT_CONTEXT (self));
const char *name = gtk_accessible_role_to_name (role, NULL);
g_dbus_method_invocation_return_value (invocation, g_variant_new ("(s)", name));
}
else if (g_strcmp0 (method_name, "GetLocalizedRoleName") == 0)
{
GtkAccessibleRole role = gtk_at_context_get_accessible_role (GTK_AT_CONTEXT (self));
const char *name = gtk_accessible_role_to_name (role, GETTEXT_PACKAGE);
g_dbus_method_invocation_return_value (invocation, g_variant_new ("(s)", name));
}
else if (g_strcmp0 (method_name, "GetState") == 0)
{
GVariantBuilder builder = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("(au)"));
g_variant_builder_open (&builder, G_VARIANT_TYPE ("au"));
collect_states (self, &builder);
g_variant_builder_close (&builder);
g_dbus_method_invocation_return_value (invocation, g_variant_builder_end (&builder));
}
else if (g_strcmp0 (method_name, "GetAttributes") == 0)
{
GVariantBuilder builder = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("(a{ss})"));
g_variant_builder_open (&builder, G_VARIANT_TYPE ("a{ss}"));
g_variant_builder_add (&builder, "{ss}", "toolkit", "GTK");
if (gtk_at_context_has_accessible_property (GTK_AT_CONTEXT (self), GTK_ACCESSIBLE_PROPERTY_PLACEHOLDER))
{
GtkAccessibleValue *value;
value = gtk_at_context_get_accessible_property (GTK_AT_CONTEXT (self), GTK_ACCESSIBLE_PROPERTY_PLACEHOLDER);
g_variant_builder_add (&builder, "{ss}",
"placeholder-text", gtk_string_accessible_value_get (value));
}
g_variant_builder_close (&builder);
g_dbus_method_invocation_return_value (invocation, g_variant_builder_end (&builder));
}
else if (g_strcmp0 (method_name, "GetApplication") == 0)
{
g_dbus_method_invocation_return_value (invocation,
g_variant_new ("(@(so))", gtk_at_spi_root_to_ref (self->root)));
}
else if (g_strcmp0 (method_name, "GetChildAtIndex") == 0)
{
GtkATContext *context = NULL;
GtkAccessible *accessible;
int idx, real_idx = 0;
const char *name;
const char *path;
g_variant_get (parameters, "(i)", &idx);
accessible = gtk_at_context_get_accessible (GTK_AT_CONTEXT (self));
if (GTK_IS_STACK_PAGE (accessible))
{
if (idx == 0)
{
GtkWidget *child;
child = gtk_stack_page_get_child (GTK_STACK_PAGE (accessible));
if (gtk_accessible_should_present (GTK_ACCESSIBLE (child)))
context = gtk_accessible_get_at_context (GTK_ACCESSIBLE (child));
}
}
else if (GTK_IS_WIDGET (accessible))
{
GtkWidget *widget = GTK_WIDGET (accessible);
GtkWidget *child;
real_idx = 0;
for (child = gtk_widget_get_first_child (widget);
child;
child = gtk_widget_get_next_sibling (child))
{
if (!gtk_accessible_should_present (GTK_ACCESSIBLE (child)))
continue;
if (real_idx == idx)
break;
real_idx += 1;
}
if (child)
{
if (GTK_IS_STACK (accessible))
context = gtk_accessible_get_at_context (GTK_ACCESSIBLE (gtk_stack_get_page (GTK_STACK (accessible), child)));
else
context = gtk_accessible_get_at_context (GTK_ACCESSIBLE (child));
}
}
if (context == NULL)
{
g_dbus_method_invocation_return_error (invocation,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
"No child with index %d", idx);
return;
}
name = g_dbus_connection_get_unique_name (self->connection);
path = gtk_at_spi_context_get_context_path (GTK_AT_SPI_CONTEXT (context));
g_dbus_method_invocation_return_value (invocation, g_variant_new ("((so))", name, path));
}
else if (g_strcmp0 (method_name, "GetChildren") == 0)
{
GVariantBuilder builder = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("a(so)"));
GtkAccessible *accessible = gtk_at_context_get_accessible (GTK_AT_CONTEXT (self));
if (GTK_IS_WIDGET (accessible))
{
GtkWidget *widget = GTK_WIDGET (accessible);
GtkWidget *child;
for (child = gtk_widget_get_first_child (widget);
child;
child = gtk_widget_get_next_sibling (child))
{
if (!gtk_accessible_should_present (GTK_ACCESSIBLE (child)))
continue;
GtkATContext *context = gtk_accessible_get_at_context (GTK_ACCESSIBLE (child));
const char *name = g_dbus_connection_get_unique_name (self->connection);
const char *path = gtk_at_spi_context_get_context_path (GTK_AT_SPI_CONTEXT (context));
g_variant_builder_add (&builder, "(so)", name, path);
}
}
else if (GTK_IS_STACK_PAGE (accessible))
{
GtkWidget *child = gtk_stack_page_get_child (GTK_STACK_PAGE (accessible));
if (gtk_accessible_should_present (GTK_ACCESSIBLE (child)))
{
GtkATContext *context = gtk_accessible_get_at_context (GTK_ACCESSIBLE (child));
const char *name = g_dbus_connection_get_unique_name (self->connection);
const char *path = gtk_at_spi_context_get_context_path (GTK_AT_SPI_CONTEXT (context));
g_variant_builder_add (&builder, "(so)", name, path);
}
}
g_dbus_method_invocation_return_value (invocation, g_variant_new ("(a(so))", &builder));
}
else if (g_strcmp0 (method_name, "GetIndexInParent") == 0)
{
GtkAccessible *accessible = gtk_at_context_get_accessible (GTK_AT_CONTEXT (self));
int idx;
if (GTK_IS_ROOT (accessible))
idx = get_index_in_toplevels (GTK_WIDGET (accessible));
else if (GTK_IS_STACK_PAGE (accessible))
idx = get_index_in_parent (gtk_stack_page_get_child (GTK_STACK_PAGE (accessible)));
else if (GTK_IS_STACK (gtk_widget_get_parent (GTK_WIDGET (accessible))))
idx = 1;
else
idx = get_index_in_parent (GTK_WIDGET (accessible));
if (idx == -1)
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED, "Not found");
else
g_dbus_method_invocation_return_value (invocation, g_variant_new ("(i)", idx));
}
else if (g_strcmp0 (method_name, "GetRelationSet") == 0)
{
GVariantBuilder builder = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("a(ua(so))"));
collect_relations (self, &builder);
g_dbus_method_invocation_return_value (invocation, g_variant_new ("(a(ua(so)))", &builder));
}
else if (g_strcmp0 (method_name, "GetInterfaces") == 0)
{
g_dbus_method_invocation_return_value (invocation, g_variant_new ("(@as)", self->interfaces));
}
}
static GVariant *
handle_accessible_get_property (GDBusConnection *connection,
const gchar *sender,
const gchar *object_path,
const gchar *interface_name,
const gchar *property_name,
GError **error,
gpointer user_data)
{
GtkAtSpiContext *self = user_data;
GVariant *res = NULL;
GtkAccessible *accessible = gtk_at_context_get_accessible (GTK_AT_CONTEXT (self));
if (g_strcmp0 (property_name, "Name") == 0)
{
char *label = gtk_at_context_get_name (GTK_AT_CONTEXT (self));
res = g_variant_new_string (label ? label : "");
g_free (label);
}
else if (g_strcmp0 (property_name, "Description") == 0)
{
char *label = gtk_at_context_get_description (GTK_AT_CONTEXT (self));
res = g_variant_new_string (label ? label : "");
g_free (label);
}
else if (g_strcmp0 (property_name, "Locale") == 0)
res = g_variant_new_string (setlocale (LC_MESSAGES, NULL));
else if (g_strcmp0 (property_name, "AccessibleId") == 0)
res = g_variant_new_string ("");
else if (g_strcmp0 (property_name, "Parent") == 0)
{
if (GTK_IS_WIDGET (accessible))
{
GtkWidget *parent = gtk_widget_get_parent (GTK_WIDGET (accessible));
if (parent == NULL)
{
res = gtk_at_spi_root_to_ref (self->root);
}
else if (GTK_IS_STACK (parent))
{
GtkStackPage *page =
gtk_stack_get_page (GTK_STACK (parent), GTK_WIDGET (accessible));
GtkATContext *parent_context =
gtk_accessible_get_at_context (GTK_ACCESSIBLE (page));
if (parent_context != NULL)
res = g_variant_new ("(so)",
g_dbus_connection_get_unique_name (self->connection),
GTK_AT_SPI_CONTEXT (parent_context)->context_path);
}
else
{
GtkATContext *parent_context =
gtk_accessible_get_at_context (GTK_ACCESSIBLE (parent));
if (parent_context != NULL)
res = g_variant_new ("(so)",
g_dbus_connection_get_unique_name (self->connection),
GTK_AT_SPI_CONTEXT (parent_context)->context_path);
}
}
else if (GTK_IS_STACK_PAGE (accessible))
{
GtkWidget *parent = gtk_widget_get_parent (gtk_stack_page_get_child (GTK_STACK_PAGE (accessible)));
GtkATContext *parent_context =
gtk_accessible_get_at_context (GTK_ACCESSIBLE (parent));
if (parent_context != NULL)
res = g_variant_new ("(so)",
g_dbus_connection_get_unique_name (self->connection),
GTK_AT_SPI_CONTEXT (parent_context)->context_path);
}
if (res == NULL)
res = gtk_at_spi_null_ref ();
}
else if (g_strcmp0 (property_name, "ChildCount") == 0)
{
int n_children = 0;
if (GTK_IS_WIDGET (accessible))
{
GtkWidget *child;
for (child = gtk_widget_get_first_child (GTK_WIDGET (accessible));
child;
child = gtk_widget_get_next_sibling (child))
{
if (!gtk_accessible_should_present (GTK_ACCESSIBLE (child)))
continue;
n_children++;
}
}
else if (GTK_IS_STACK_PAGE (accessible))
{
n_children = 1;
}
res = g_variant_new_int32 (n_children);
}
else
g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
"Unknown property '%s'", property_name);
return res;
}
static const GDBusInterfaceVTable accessible_vtable = {
handle_accessible_method,
handle_accessible_get_property,
NULL,
};
/* }}} */
/* {{{ Change notification */
static void
emit_text_changed (GtkAtSpiContext *self,
const char *kind,
int start,
int end,
const char *text)
{
g_dbus_connection_emit_signal (self->connection,
NULL,
self->context_path,
"org.a11y.atspi.Event.Object",
"TextChanged",
g_variant_new ("(siiva{sv})",
kind, start, end, g_variant_new_string (text), NULL),
NULL);
}
static void
emit_text_selection_changed (GtkAtSpiContext *self,
const char *kind,
int cursor_position)
{
if (strcmp (kind, "text-caret-moved") == 0)
g_dbus_connection_emit_signal (self->connection,
NULL,
self->context_path,
"org.a11y.atspi.Event.Object",
"TextCaretMoved",
g_variant_new ("(siiva{sv})",
"", cursor_position, 0, g_variant_new_string (""), NULL),
NULL);
else
g_dbus_connection_emit_signal (self->connection,
NULL,
self->context_path,
"org.a11y.atspi.Event.Object",
"TextSelectionChanged",
g_variant_new ("(siiva{sv})",
"", 0, 0, g_variant_new_string (""), NULL),
NULL);
}
static void
emit_selection_changed (GtkAtSpiContext *self,
const char *kind)
{
g_dbus_connection_emit_signal (self->connection,
NULL,
self->context_path,
"org.a11y.atspi.Event.Object",
"SelectionChanged",
g_variant_new ("(siiva{sv})",
"", 0, 0, g_variant_new_string (""), NULL),
NULL);
}
static void
emit_state_changed (GtkAtSpiContext *self,
const char *name,
gboolean enabled)
{
g_dbus_connection_emit_signal (self->connection,
NULL,
self->context_path,
"org.a11y.atspi.Event.Object",
"StateChanged",
g_variant_new ("(siiva{sv})",
name, enabled, 0, g_variant_new_string ("0"), NULL),
NULL);
}
static void
emit_property_changed (GtkAtSpiContext *self,
const char *name,
GVariant *value)
{
g_dbus_connection_emit_signal (self->connection,
NULL,
self->context_path,
"org.a11y.atspi.Event.Object",
"PropertyChange",
g_variant_new ("(siiva{sv})",
name, 0, 0, value, NULL),
NULL);
}
static void
emit_bounds_changed (GtkAtSpiContext *self,
int x,
int y,
int width,
int height)
{
g_dbus_connection_emit_signal (self->connection,
NULL,
self->context_path,
"org.a11y.atspi.Event.Object",
"BoundsChanged",
g_variant_new ("(siiva{sv})",
"", 0, 0, g_variant_new ("(iiii)", x, y, width, height), NULL),
NULL);
}
static void
emit_children_changed (GtkAtSpiContext *self,
GtkAtSpiContext *child_context,
int idx,
GtkAccessibleChildState state)
{
GVariant *child_ref = gtk_at_spi_context_to_ref (child_context);
GVariant *context_ref = gtk_at_spi_context_to_ref (self);
gtk_at_spi_emit_children_changed (self->connection,
self->context_path,
state,
idx,
child_ref,
context_ref);
}
static void
gtk_at_spi_context_state_change (GtkATContext *ctx,
GtkAccessibleStateChange changed_states,
GtkAccessiblePropertyChange changed_properties,
GtkAccessibleRelationChange changed_relations,
GtkAccessibleAttributeSet *states,
GtkAccessibleAttributeSet *properties,
GtkAccessibleAttributeSet *relations)
{
GtkAtSpiContext *self = GTK_AT_SPI_CONTEXT (ctx);
GtkAccessible *accessible = gtk_at_context_get_accessible (ctx);
GtkWidget *widget;
GtkAccessibleValue *value;
if (!GTK_IS_WIDGET (accessible))
return;
widget = GTK_WIDGET (accessible);
if (!gtk_widget_get_realized (widget))
return;
if (changed_states & GTK_ACCESSIBLE_STATE_CHANGE_HIDDEN)
{
GtkWidget *parent;
gboolean hidden;
value = gtk_accessible_attribute_set_get_value (states, GTK_ACCESSIBLE_STATE_HIDDEN);
hidden = gtk_boolean_accessible_value_get (value);
parent = gtk_widget_get_parent (widget);
if (parent)
{
if (GTK_IS_STACK (parent))
g_warning ("Setting GTK_ACCESSIBLE_STATE_HIDDEN on stack children is not supported");
else
gtk_at_context_child_changed (gtk_accessible_get_at_context (GTK_ACCESSIBLE (parent)),
hidden ? GTK_ACCESSIBLE_CHILD_CHANGE_REMOVED
: GTK_ACCESSIBLE_CHILD_CHANGE_ADDED,
GTK_ACCESSIBLE (widget));
}
else
{
gtk_at_spi_root_child_changed (self->root,
hidden ? GTK_ACCESSIBLE_CHILD_STATE_REMOVED
: GTK_ACCESSIBLE_CHILD_STATE_ADDED,
widget);
}
}
if (changed_states & GTK_ACCESSIBLE_STATE_CHANGE_BUSY)
{
value = gtk_accessible_attribute_set_get_value (states, GTK_ACCESSIBLE_STATE_BUSY);
emit_state_changed (self, "busy", gtk_boolean_accessible_value_get (value));
}
if (changed_states & GTK_ACCESSIBLE_STATE_CHANGE_CHECKED)
{
value = gtk_accessible_attribute_set_get_value (states, GTK_ACCESSIBLE_STATE_CHECKED);
switch (gtk_tristate_accessible_value_get (value))
{
case GTK_ACCESSIBLE_TRISTATE_TRUE:
emit_state_changed (self, "checked", TRUE);
emit_state_changed (self, "indeterminate", FALSE);
break;
case GTK_ACCESSIBLE_TRISTATE_MIXED:
emit_state_changed (self, "checked", FALSE);
emit_state_changed (self, "indeterminate", TRUE);
break;
case GTK_ACCESSIBLE_TRISTATE_FALSE:
emit_state_changed (self, "checked", FALSE);
emit_state_changed (self, "indeterminate", FALSE);
default:
break;
}
}
if (changed_states & GTK_ACCESSIBLE_STATE_CHANGE_DISABLED)
{
value = gtk_accessible_attribute_set_get_value (states, GTK_ACCESSIBLE_STATE_DISABLED);
emit_state_changed (self, "sensitive", !gtk_boolean_accessible_value_get (value));
}
if (changed_states & GTK_ACCESSIBLE_STATE_CHANGE_EXPANDED)
{
value = gtk_accessible_attribute_set_get_value (states, GTK_ACCESSIBLE_STATE_EXPANDED);
if (value->value_class->type == GTK_ACCESSIBLE_VALUE_TYPE_BOOLEAN)
{
emit_state_changed (self, "expandable", TRUE);
emit_state_changed (self, "expanded",gtk_boolean_accessible_value_get (value));
}
else
emit_state_changed (self, "expandable", FALSE);
}
if (changed_states & GTK_ACCESSIBLE_STATE_CHANGE_INVALID)
{
value = gtk_accessible_attribute_set_get_value (states, GTK_ACCESSIBLE_STATE_INVALID);
switch (gtk_invalid_accessible_value_get (value))
{
case GTK_ACCESSIBLE_INVALID_TRUE:
case GTK_ACCESSIBLE_INVALID_GRAMMAR:
case GTK_ACCESSIBLE_INVALID_SPELLING:
emit_state_changed (self, "invalid", TRUE);
break;
case GTK_ACCESSIBLE_INVALID_FALSE:
emit_state_changed (self, "invalid", FALSE);
default:
break;
}
}
if (changed_states & GTK_ACCESSIBLE_STATE_CHANGE_PRESSED)
{
value = gtk_accessible_attribute_set_get_value (states, GTK_ACCESSIBLE_STATE_PRESSED);
switch (gtk_tristate_accessible_value_get (value))
{
case GTK_ACCESSIBLE_TRISTATE_TRUE:
emit_state_changed (self, "pressed", TRUE);
emit_state_changed (self, "indeterminate", FALSE);
break;
case GTK_ACCESSIBLE_TRISTATE_MIXED:
emit_state_changed (self, "pressed", FALSE);
emit_state_changed (self, "indeterminate", TRUE);
break;
case GTK_ACCESSIBLE_TRISTATE_FALSE:
emit_state_changed (self, "pressed", FALSE);
emit_state_changed (self, "indeterminate", FALSE);
default:
break;
}
}
if (changed_states & GTK_ACCESSIBLE_STATE_CHANGE_SELECTED)
{
value = gtk_accessible_attribute_set_get_value (states, GTK_ACCESSIBLE_STATE_SELECTED);
if (value->value_class->type == GTK_ACCESSIBLE_VALUE_TYPE_BOOLEAN)
{
emit_state_changed (self, "selectable", TRUE);
emit_state_changed (self, "selected",gtk_boolean_accessible_value_get (value));
}
else
emit_state_changed (self, "selectable", FALSE);
}
if (changed_properties & GTK_ACCESSIBLE_PROPERTY_CHANGE_READ_ONLY)
{
gboolean readonly;
value = gtk_accessible_attribute_set_get_value (properties, GTK_ACCESSIBLE_PROPERTY_READ_ONLY);
readonly = gtk_boolean_accessible_value_get (value);
emit_state_changed (self, "read-only", readonly);
if (ctx->accessible_role == GTK_ACCESSIBLE_ROLE_TEXT_BOX)
emit_state_changed (self, "editable", !readonly);
}
if (changed_properties & GTK_ACCESSIBLE_PROPERTY_CHANGE_ORIENTATION)
{
value = gtk_accessible_attribute_set_get_value (properties, GTK_ACCESSIBLE_PROPERTY_ORIENTATION);
if (gtk_orientation_accessible_value_get (value) == GTK_ORIENTATION_HORIZONTAL)
{
emit_state_changed (self, "horizontal", TRUE);
emit_state_changed (self, "vertical", FALSE);
}
else
{
emit_state_changed (self, "horizontal", FALSE);
emit_state_changed (self, "vertical", TRUE);
}
}
if (changed_properties & GTK_ACCESSIBLE_PROPERTY_CHANGE_MODAL)
{
value = gtk_accessible_attribute_set_get_value (properties, GTK_ACCESSIBLE_PROPERTY_MODAL);
emit_state_changed (self, "modal", gtk_boolean_accessible_value_get (value));
}
if (changed_properties & GTK_ACCESSIBLE_PROPERTY_CHANGE_MULTI_LINE)
{
value = gtk_accessible_attribute_set_get_value (properties, GTK_ACCESSIBLE_PROPERTY_MULTI_LINE);
emit_state_changed (self, "multi-line", gtk_boolean_accessible_value_get (value));
}
if (changed_properties & GTK_ACCESSIBLE_PROPERTY_CHANGE_LABEL)
{
char *label = gtk_at_context_get_name (GTK_AT_CONTEXT (self));
GVariant *v = g_variant_new_take_string (label);
emit_property_changed (self, "accessible-name", v);
}
if (changed_properties & GTK_ACCESSIBLE_PROPERTY_CHANGE_DESCRIPTION)
{
char *label = gtk_at_context_get_description (GTK_AT_CONTEXT (self));
GVariant *v = g_variant_new_take_string (label);
emit_property_changed (self, "accessible-description", v);
}
}
static void
gtk_at_spi_context_platform_change (GtkATContext *ctx,
GtkAccessiblePlatformChange changed_platform)
{
GtkAtSpiContext *self = GTK_AT_SPI_CONTEXT (ctx);
GtkAccessible *accessible = gtk_at_context_get_accessible (ctx);
GtkWidget *widget;
if (!GTK_IS_WIDGET (accessible))
return;
widget = GTK_WIDGET (accessible);
if (!gtk_widget_get_realized (widget))
return;
if (changed_platform & GTK_ACCESSIBLE_PLATFORM_CHANGE_FOCUSABLE)
{
gboolean state = gtk_accessible_get_platform_state (GTK_ACCESSIBLE (widget),
GTK_ACCESSIBLE_PLATFORM_STATE_FOCUSABLE);
emit_state_changed (self, "focusable", state);
}
if (changed_platform & GTK_ACCESSIBLE_PLATFORM_CHANGE_FOCUSED)
{
gboolean state = gtk_accessible_get_platform_state (GTK_ACCESSIBLE (widget),
GTK_ACCESSIBLE_PLATFORM_STATE_FOCUSED);
emit_state_changed (self, "focused", state);
}
}
static void
gtk_at_spi_context_bounds_change (GtkATContext *ctx)
{
GtkAtSpiContext *self = GTK_AT_SPI_CONTEXT (ctx);
GtkAccessible *accessible = gtk_at_context_get_accessible (ctx);
GtkWidget *widget;
GtkWidget *parent;
double x, y;
int width, height;
if (!GTK_IS_WIDGET (accessible))
return;
widget = GTK_WIDGET (accessible);
if (!gtk_widget_get_realized (widget))
return;
parent = gtk_widget_get_parent (widget);
if (parent)
gtk_widget_translate_coordinates (widget, parent, 0., 0., &x, &y);
else
x = y = 0.;
width = gtk_widget_get_width (widget);
height = gtk_widget_get_height (widget);
emit_bounds_changed (self, (int)x, (int)y, width, height);
}
static void
gtk_at_spi_context_child_change (GtkATContext *ctx,
GtkAccessibleChildChange change,
GtkAccessible *child)
{
GtkAtSpiContext *self = GTK_AT_SPI_CONTEXT (ctx);
GtkAccessible *accessible = gtk_at_context_get_accessible (ctx);
GtkATContext *child_context = gtk_accessible_get_at_context (child);
GtkWidget *parent_widget;
GtkWidget *child_widget;
int idx = 0;
if (!GTK_IS_WIDGET (accessible) || !GTK_IS_WIDGET (child))
return;
if (child_context == NULL)
return;
parent_widget = GTK_WIDGET (accessible);
child_widget = GTK_WIDGET (child);
/* handle the stack page special case */
if (GTK_IS_WIDGET (child) &&
GTK_IS_STACK (gtk_widget_get_parent (GTK_WIDGET (child))))
{
GtkWidget *stack;
GtkStackPage *page;
GListModel *pages;
stack = gtk_widget_get_parent (GTK_WIDGET (child));
page = gtk_stack_get_page (GTK_STACK (stack), GTK_WIDGET (child));
pages = G_LIST_MODEL (gtk_stack_get_pages (GTK_STACK (stack)));
idx = 0;
for (guint i = 0; i < g_list_model_get_n_items (pages); i++)
{
GtkStackPage *item = g_list_model_get_item (pages, i);
g_object_unref (item);
if (!gtk_accessible_should_present (GTK_ACCESSIBLE (item)))
continue;
if (item == page)
break;
idx++;
}
g_object_unref (pages);
if (change & GTK_ACCESSIBLE_CHILD_CHANGE_ADDED)
{
emit_children_changed (GTK_AT_SPI_CONTEXT (gtk_accessible_get_at_context (GTK_ACCESSIBLE (stack))),
GTK_AT_SPI_CONTEXT (gtk_accessible_get_at_context (GTK_ACCESSIBLE (page))),
idx,
GTK_ACCESSIBLE_CHILD_STATE_ADDED);
emit_children_changed (GTK_AT_SPI_CONTEXT (gtk_accessible_get_at_context (GTK_ACCESSIBLE (page))),
GTK_AT_SPI_CONTEXT (gtk_accessible_get_at_context (child)),
0,
GTK_ACCESSIBLE_CHILD_STATE_ADDED);
}
if (change & GTK_ACCESSIBLE_CHILD_CHANGE_REMOVED)
{
emit_children_changed (GTK_AT_SPI_CONTEXT (gtk_accessible_get_at_context (GTK_ACCESSIBLE (page))),
GTK_AT_SPI_CONTEXT (gtk_accessible_get_at_context (child)),
0,
GTK_ACCESSIBLE_CHILD_STATE_REMOVED);
emit_children_changed (GTK_AT_SPI_CONTEXT (gtk_accessible_get_at_context (GTK_ACCESSIBLE (stack))),
GTK_AT_SPI_CONTEXT (gtk_accessible_get_at_context (GTK_ACCESSIBLE (page))),
idx,
GTK_ACCESSIBLE_CHILD_STATE_REMOVED);
}
return;
}
if (gtk_widget_get_parent (child_widget) != parent_widget)
{
idx = 0;
}
else
{
for (GtkWidget *iter = gtk_widget_get_first_child (parent_widget);
iter != NULL;
iter = gtk_widget_get_next_sibling (iter))
{
if (!gtk_accessible_should_present (GTK_ACCESSIBLE (iter)))
continue;
if (iter == child_widget)
break;
idx += 1;
}
}
if (change & GTK_ACCESSIBLE_CHILD_CHANGE_ADDED)
emit_children_changed (self,
GTK_AT_SPI_CONTEXT (child_context),
idx,
GTK_ACCESSIBLE_CHILD_STATE_ADDED);
else if (change & GTK_ACCESSIBLE_CHILD_CHANGE_REMOVED)
emit_children_changed (self,
GTK_AT_SPI_CONTEXT (child_context),
idx,
GTK_ACCESSIBLE_CHILD_STATE_REMOVED);
}
/* }}} */
/* {{{ D-Bus Registration */
static void
gtk_at_spi_context_register_object (GtkAtSpiContext *self)
{
GtkAccessible *accessible = gtk_at_context_get_accessible (GTK_AT_CONTEXT (self));
GVariantBuilder interfaces = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE_STRING_ARRAY);
const GDBusInterfaceVTable *vtable;
g_variant_builder_add (&interfaces, "s", atspi_accessible_interface.name);
self->registration_ids[self->n_registered_objects] =
g_dbus_connection_register_object (self->connection,
self->context_path,
(GDBusInterfaceInfo *) &atspi_accessible_interface,
&accessible_vtable,
self,
NULL,
NULL);
self->n_registered_objects++;
vtable = gtk_atspi_get_component_vtable (accessible);
if (vtable)
{
g_variant_builder_add (&interfaces, "s", atspi_component_interface.name);
self->registration_ids[self->n_registered_objects] =
g_dbus_connection_register_object (self->connection,
self->context_path,
(GDBusInterfaceInfo *) &atspi_component_interface,
vtable,
self,
NULL,
NULL);
self->n_registered_objects++;
}
vtable = gtk_atspi_get_text_vtable (accessible);
if (vtable)
{
g_variant_builder_add (&interfaces, "s", atspi_text_interface.name);
self->registration_ids[self->n_registered_objects] =
g_dbus_connection_register_object (self->connection,
self->context_path,
(GDBusInterfaceInfo *) &atspi_text_interface,
vtable,
self,
NULL,
NULL);
self->n_registered_objects++;
}
vtable = gtk_atspi_get_editable_text_vtable (accessible);
if (vtable)
{
g_variant_builder_add (&interfaces, "s", atspi_editable_text_interface.name);
self->registration_ids[self->n_registered_objects] =
g_dbus_connection_register_object (self->connection,
self->context_path,
(GDBusInterfaceInfo *) &atspi_editable_text_interface,
vtable,
self,
NULL,
NULL);
self->n_registered_objects++;
}
vtable = gtk_atspi_get_value_vtable (accessible);
if (vtable)
{
g_variant_builder_add (&interfaces, "s", atspi_value_interface.name);
self->registration_ids[self->n_registered_objects] =
g_dbus_connection_register_object (self->connection,
self->context_path,
(GDBusInterfaceInfo *) &atspi_value_interface,
vtable,
self,
NULL,
NULL);
self->n_registered_objects++;
}
/* Calling gtk_accessible_get_accessible_role() in here will recurse,
* so pass the role in explicitly.
*/
vtable = gtk_atspi_get_selection_vtable (accessible,
GTK_AT_CONTEXT (self)->accessible_role);
if (vtable)
{
g_variant_builder_add (&interfaces, "s", atspi_selection_interface.name);
self->registration_ids[self->n_registered_objects] =
g_dbus_connection_register_object (self->connection,
self->context_path,
(GDBusInterfaceInfo *) &atspi_selection_interface,
vtable,
self,
NULL,
NULL);
self->n_registered_objects++;
}
vtable = gtk_atspi_get_action_vtable (accessible);
if (vtable)
{
g_variant_builder_add (&interfaces, "s", atspi_action_interface.name);
self->registration_ids[self->n_registered_objects] =
g_dbus_connection_register_object (self->connection,
self->context_path,
(GDBusInterfaceInfo *) &atspi_action_interface,
vtable,
self,
NULL,
NULL);
self->n_registered_objects++;
}
self->interfaces = g_variant_ref_sink (g_variant_builder_end (&interfaces));
}
static void
gtk_at_spi_context_unregister_object (GtkAtSpiContext *self)
{
while (self->n_registered_objects > 0)
{
self->n_registered_objects--;
g_dbus_connection_unregister_object (self->connection,
self->registration_ids[self->n_registered_objects]);
self->registration_ids[self->n_registered_objects] = 0;
}
}
/* }}} */
/* {{{ GObject boilerplate */
static void
gtk_at_spi_context_dispose (GObject *gobject)
{
GtkAtSpiContext *self = GTK_AT_SPI_CONTEXT (gobject);
GtkAccessible *accessible = gtk_at_context_get_accessible (GTK_AT_CONTEXT (self));
gtk_at_spi_context_unregister_object (self);
gtk_atspi_disconnect_text_signals (accessible);
gtk_atspi_disconnect_selection_signals (accessible);
G_OBJECT_CLASS (gtk_at_spi_context_parent_class)->dispose (gobject);
}
static void
gtk_at_spi_context_finalize (GObject *gobject)
{
GtkAtSpiContext *self = GTK_AT_SPI_CONTEXT (gobject);
g_free (self->bus_address);
g_free (self->context_path);
g_clear_pointer (&self->interfaces, g_variant_unref);
G_OBJECT_CLASS (gtk_at_spi_context_parent_class)->finalize (gobject);
}
static void
gtk_at_spi_context_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkAtSpiContext *self = GTK_AT_SPI_CONTEXT (gobject);
switch (prop_id)
{
case PROP_BUS_ADDRESS:
self->bus_address = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
}
}
static void
gtk_at_spi_context_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkAtSpiContext *self = GTK_AT_SPI_CONTEXT (gobject);
switch (prop_id)
{
case PROP_BUS_ADDRESS:
g_value_set_string (value, self->bus_address);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
}
}
static void
gtk_at_spi_context_constructed (GObject *gobject)
{
GtkAtSpiContext *self = GTK_AT_SPI_CONTEXT (gobject);
GdkDisplay *display;
g_assert (self->bus_address);
/* Every GTK application has a single root AT-SPI object, which
* handles all the global state, including the cache of accessible
* objects. We use the GdkDisplay to store it, so it's guaranteed
* to be unique per-display connection
*/
display = gtk_at_context_get_display (GTK_AT_CONTEXT (self));
self->root =
g_object_get_data (G_OBJECT (display), "-gtk-atspi-root");
if (self->root == NULL)
{
self->root = gtk_at_spi_root_new (self->bus_address);
g_object_set_data_full (G_OBJECT (display), "-gtk-atspi-root",
self->root,
g_object_unref);
}
self->connection = gtk_at_spi_root_get_connection (self->root);
/* We use the application's object path to build the path of each
* accessible object exposed on the accessibility bus; the path is
* also used to access the object cache
*/
GApplication *application = g_application_get_default ();
char *base_path = NULL;
if (application != NULL)
{
const char *app_path = g_application_get_dbus_object_path (application);
base_path = g_strconcat (app_path, "/a11y", NULL);
}
else
{
char *uuid = g_uuid_string_random ();
base_path = g_strconcat ("/org/gtk/application/", uuid, "/a11y", NULL);
g_free (uuid);
}
/* We use a unique id to ensure that we don't have conflicting
* objects on the bus
*/
char *uuid = g_uuid_string_random ();
self->context_path = g_strconcat (base_path, "/", uuid, NULL);
/* UUIDs use '-' as the separator, but that's not a valid character
* for a DBus object path
*/
size_t path_len = strlen (self->context_path);
for (size_t i = 0; i < path_len; i++)
{
if (self->context_path[i] == '-')
self->context_path[i] = '_';
}
g_free (base_path);
g_free (uuid);
GtkAccessible *accessible = gtk_at_context_get_accessible (GTK_AT_CONTEXT (self));
gtk_atspi_connect_text_signals (accessible,
(GtkAtspiTextChangedCallback *)emit_text_changed,
(GtkAtspiTextSelectionCallback *)emit_text_selection_changed,
self);
gtk_atspi_connect_selection_signals (accessible,
(GtkAtspiSelectionCallback *)emit_selection_changed,
self);
gtk_at_spi_context_register_object (self);
G_OBJECT_CLASS (gtk_at_spi_context_parent_class)->constructed (gobject);
}
static void
gtk_at_spi_context_class_init (GtkAtSpiContextClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GtkATContextClass *context_class = GTK_AT_CONTEXT_CLASS (klass);
gobject_class->constructed = gtk_at_spi_context_constructed;
gobject_class->set_property = gtk_at_spi_context_set_property;
gobject_class->get_property = gtk_at_spi_context_get_property;
gobject_class->finalize = gtk_at_spi_context_finalize;
gobject_class->dispose = gtk_at_spi_context_dispose;
context_class->state_change = gtk_at_spi_context_state_change;
context_class->platform_change = gtk_at_spi_context_platform_change;
context_class->bounds_change = gtk_at_spi_context_bounds_change;
context_class->child_change = gtk_at_spi_context_child_change;
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_context_init (GtkAtSpiContext *self)
{
}
/* }}} */
/* {{{ Bus address discovery */
#ifdef GDK_WINDOWING_X11
static char *
get_bus_address_x11 (GdkDisplay *display)
{
GTK_NOTE (A11Y, g_message ("Acquiring a11y bus via X11..."));
Display *xdisplay = gdk_x11_display_get_xdisplay (display);
Atom type_return;
int format_return;
gulong nitems_return;
gulong bytes_after_return;
guchar *data = NULL;
char *address = NULL;
gdk_x11_display_error_trap_push (display);
XGetWindowProperty (xdisplay, DefaultRootWindow (xdisplay),
gdk_x11_get_xatom_by_name_for_display (display, "AT_SPI_BUS"),
0L, BUFSIZ, False,
(Atom) 31,
&type_return, &format_return, &nitems_return,
&bytes_after_return, &data);
gdk_x11_display_error_trap_pop_ignored (display);
address = g_strdup ((char *) data);
XFree (data);
return address;
}
#endif
#if defined(GDK_WINDOWING_WAYLAND) || defined(GDK_WINDOWING_X11)
static char *
get_bus_address_dbus (GdkDisplay *display)
{
GTK_NOTE (A11Y, g_message ("Acquiring a11y bus via DBus..."));
GError *error = NULL;
GDBusConnection *connection = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, &error);
if (error != NULL)
{
g_critical ("Unable to acquire session bus: %s", error->message);
g_error_free (error);
return NULL;
}
GVariant *res =
g_dbus_connection_call_sync (connection, "org.a11y.Bus",
"/org/a11y/bus",
"org.a11y.Bus",
"GetAddress",
NULL, NULL,
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL,
&error);
if (error != NULL)
{
g_critical ("Unable to acquire the address of the accessibility bus: %s",
error->message);
g_error_free (error);
}
char *address = NULL;
if (res != NULL)
{
g_variant_get (res, "(s)", &address);
g_variant_unref (res);
}
g_object_unref (connection);
return address;
}
#endif
static const char *
get_bus_address (GdkDisplay *display)
{
const char *bus_address;
bus_address = g_object_get_data (G_OBJECT (display), "-gtk-atspi-bus-address");
if (bus_address != NULL)
return bus_address;
/* The bus address environment variable takes precedence; this is the
* mechanism used by Flatpak to handle the accessibility bus portal
* between the sandbox and the outside world
*/
bus_address = g_getenv ("AT_SPI_BUS_ADDRESS");
if (bus_address != NULL && *bus_address != '\0')
{
GTK_NOTE (A11Y, g_message ("Using ATSPI bus address from environment: %s", bus_address));
g_object_set_data_full (G_OBJECT (display), "-gtk-atspi-bus-address",
g_strdup (bus_address),
g_free);
goto out;
}
#if defined(GDK_WINDOWING_WAYLAND)
if (bus_address == NULL)
{
if (GDK_IS_WAYLAND_DISPLAY (display))
{
char *addr = get_bus_address_dbus (display);
GTK_NOTE (A11Y, g_message ("Using ATSPI bus address from D-Bus: %s", addr));
g_object_set_data_full (G_OBJECT (display), "-gtk-atspi-bus-address",
addr,
g_free);
bus_address = addr;
}
}
#endif
#if defined(GDK_WINDOWING_X11)
if (bus_address == NULL)
{
if (GDK_IS_X11_DISPLAY (display))
{
char *addr = get_bus_address_dbus (display);
if (addr == NULL)
{
addr = get_bus_address_x11 (display);
GTK_NOTE (A11Y, g_message ("Using ATSPI bus address from X11: %s", addr));
}
else
{
GTK_NOTE (A11Y, g_message ("Using ATSPI bus address from D-Bus: %s", addr));
}
g_object_set_data_full (G_OBJECT (display), "-gtk-atspi-bus-address",
addr,
g_free);
bus_address = addr;
}
}
#endif
out:
return bus_address;
}
/* }}} */
/* {{{ API */
GtkATContext *
gtk_at_spi_create_context (GtkAccessibleRole accessible_role,
GtkAccessible *accessible,
GdkDisplay *display)
{
g_return_val_if_fail (GTK_IS_ACCESSIBLE (accessible), NULL);
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
const char *bus_address = get_bus_address (display);
if (bus_address == NULL)
return NULL;
#if defined(GDK_WINDOWING_WAYLAND)
if (GDK_IS_WAYLAND_DISPLAY (display))
return g_object_new (GTK_TYPE_AT_SPI_CONTEXT,
"accessible-role", accessible_role,
"accessible", accessible,
"display", display,
"bus-address", bus_address,
NULL);
#endif
#if defined(GDK_WINDOWING_X11)
if (GDK_IS_X11_DISPLAY (display))
return g_object_new (GTK_TYPE_AT_SPI_CONTEXT,
"accessible-role", accessible_role,
"accessible", accessible,
"display", display,
"bus-address", bus_address,
NULL);
#endif
return NULL;
}
const char *
gtk_at_spi_context_get_context_path (GtkAtSpiContext *self)
{
g_return_val_if_fail (GTK_IS_AT_SPI_CONTEXT (self), NULL);
return self->context_path;
}
/*< private >
* gtk_at_spi_context_to_ref:
* @self: a #GtkAtSpiContext
*
* Returns an ATSPI object reference for the #GtkAtSpiContext.
*
* Returns: (transfer floating): a #GVariant with the reference
*/
GVariant *
gtk_at_spi_context_to_ref (GtkAtSpiContext *self)
{
const char *name = g_dbus_connection_get_unique_name (self->connection);
return g_variant_new ("(so)", name, self->context_path);
}
/* }}} */
/* vim:set foldmethod=marker expandtab: */
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