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gtk2/gtk/a11y/gtkatspicontext.c
Sebastian Keller 6e3dbc42a8 a11y: Realize GtkStackPage parent context before trying to get a ref 
If a context is not realized, calling gtk_at_spi_context_to_ref() will
return a null ref, because its path has not been initialized yet. This
was already done for all other cases in get_parent_context_ref(), but
was missing for the GtkStackPage case.

Fixes: https://gitlab.gnome.org/GNOME/gtk/-/issues/4944
2022-05-25 14:56:05 +02:00

1878 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 "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 "gtkstack.h"
#include "gtktextview.h"
#include "gtktypebuiltins.h"
#include "gtkwindow.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 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;
};
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_WINDOW)
{
set_atspi_state (&states, ATSPI_STATE_SHOWING);
if (gtk_accessible_get_platform_state (accessible, GTK_ACCESSIBLE_PLATFORM_STATE_ACTIVE))
set_atspi_state (&states, ATSPI_STATE_ACTIVE);
}
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;
int i;
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));
/* Realize the ATContext of the target, so we can ask for its ref */
gtk_at_context_realize (target_ctx);
g_variant_builder_add (&b, "@(so)",
gtk_at_spi_context_to_ref (GTK_AT_SPI_CONTEXT (target_ctx)));
}
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;
if (parent == NULL)
return -1;
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 GVariant *
get_parent_context_ref (GtkAccessible *accessible)
{
GVariant *res = NULL;
if (GTK_IS_WIDGET (accessible))
{
GtkWidget *widget = GTK_WIDGET (accessible);
GtkWidget *parent = gtk_widget_get_parent (widget);
if (parent == NULL)
{
GtkATContext *context = gtk_accessible_get_at_context (accessible);
GtkAtSpiContext *self = GTK_AT_SPI_CONTEXT (context);
res = gtk_at_spi_root_to_ref (self->root);
}
else if (GTK_IS_STACK (parent))
{
GtkStackPage *page =
gtk_stack_get_page (GTK_STACK (parent), widget);
GtkATContext *parent_context =
gtk_accessible_get_at_context (GTK_ACCESSIBLE (page));
if (parent_context != NULL)
{
gtk_at_context_realize (parent_context);
res = gtk_at_spi_context_to_ref (GTK_AT_SPI_CONTEXT (parent_context));
}
}
else
{
GtkATContext *parent_context =
gtk_accessible_get_at_context (GTK_ACCESSIBLE (parent));
if (parent_context != NULL)
{
/* XXX: This realize() is needed otherwise opening a GtkPopover will
* emit a warning when getting the context's reference
*/
gtk_at_context_realize (parent_context);
res = gtk_at_spi_context_to_ref (GTK_AT_SPI_CONTEXT (parent_context));
}
}
}
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)
{
gtk_at_context_realize (parent_context);
res = gtk_at_spi_context_to_ref (GTK_AT_SPI_CONTEXT (parent_context));
}
}
if (res == NULL)
res = gtk_at_spi_null_ref ();
return res;
}
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;
GTK_NOTE (A11Y, g_message ("handling %s on %s", method_name, object_path));
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;
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;
}
/* Realize the child ATContext in order to get its ref */
gtk_at_context_realize (context);
GVariant *ref = gtk_at_spi_context_to_ref (GTK_AT_SPI_CONTEXT (context));
g_dbus_method_invocation_return_value (invocation, g_variant_new ("(@(so))", ref));
}
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));
/* Realize the child ATContext in order to get its ref */
gtk_at_context_realize (context);
GVariant *ref = gtk_at_spi_context_to_ref (GTK_AT_SPI_CONTEXT (context));
if (ref != NULL)
g_variant_builder_add (&builder, "@(so)", ref);
}
}
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));
/* Realize the child ATContext in order to get its ref */
gtk_at_context_realize (context);
GVariant *ref = gtk_at_spi_context_to_ref (GTK_AT_SPI_CONTEXT (context));
if (ref != NULL)
g_variant_builder_add (&builder, "@(so)", ref);
}
}
g_dbus_method_invocation_return_value (invocation, g_variant_new ("(a(so))", &builder));
}
else if (g_strcmp0 (method_name, "GetIndexInParent") == 0)
{
int idx = gtk_at_spi_context_get_index_in_parent (self);
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));
GTK_NOTE (A11Y, g_message ("handling GetProperty %s on %s", property_name, object_path));
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)
res = get_parent_context_ref (accessible);
else if (g_strcmp0 (property_name, "ChildCount") == 0)
res = g_variant_new_int32 (gtk_at_spi_context_get_child_count (self));
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)
{
if (self->connection == NULL)
return;
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 (self->connection == NULL)
return;
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)
{
if (self->connection == NULL)
return;
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)
{
if (self->connection == NULL)
return;
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_defunct (GtkAtSpiContext *self)
{
if (self->connection == NULL)
return;
g_dbus_connection_emit_signal (self->connection,
NULL,
self->context_path,
"org.a11y.atspi.Event.Object",
"StateChanged",
g_variant_new ("(siiva{sv})", "defunct", TRUE, 0, g_variant_new_string ("0"), NULL),
NULL);
}
static void
emit_property_changed (GtkAtSpiContext *self,
const char *name,
GVariant *value)
{
if (self->connection == NULL)
return;
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)
{
if (self->connection == NULL)
return;
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)
{
/* If we don't have a connection on either contexts, we cannot emit a signal */
if (self->connection == NULL || child_context->connection == NULL)
return;
GVariant *context_ref = gtk_at_spi_context_to_ref (self);
GVariant *child_ref = gtk_at_spi_context_to_ref (child_context);
gtk_at_spi_emit_children_changed (self->connection,
self->context_path,
state,
idx,
child_ref,
context_ref);
}
static void
emit_focus (GtkAtSpiContext *self,
gboolean focus_in)
{
if (self->connection == NULL)
return;
if (focus_in)
g_dbus_connection_emit_signal (self->connection,
NULL,
self->context_path,
"org.a11y.atspi.Event.Focus",
"Focus",
g_variant_new ("(siiva{sv})",
"", 0, 0, g_variant_new_string ("0"), NULL),
NULL);
}
static void
emit_window_event (GtkAtSpiContext *self,
const char *event_type)
{
if (self->connection == NULL)
return;
g_dbus_connection_emit_signal (self->connection,
NULL,
self->context_path,
"org.a11y.atspi.Event.Window",
event_type,
g_variant_new ("(siiva{sv})",
"", 0, 0,
g_variant_new_string("0"),
NULL),
NULL);
}
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);
GtkAccessibleValue *value;
if (GTK_IS_WIDGET (accessible) && !gtk_widget_get_realized (GTK_WIDGET (accessible)))
return;
if (changed_states & GTK_ACCESSIBLE_STATE_CHANGE_HIDDEN)
{
GtkWidget *parent;
GtkATContext *context;
GtkAccessibleChildChange change;
value = gtk_accessible_attribute_set_get_value (states, GTK_ACCESSIBLE_STATE_HIDDEN);
if (gtk_boolean_accessible_value_get (value))
change = GTK_ACCESSIBLE_CHILD_CHANGE_REMOVED;
else
change = GTK_ACCESSIBLE_CHILD_CHANGE_ADDED;
if (GTK_IS_ROOT (accessible))
{
gtk_at_spi_root_child_changed (self->root, change, accessible);
emit_state_changed (self, "showing", gtk_boolean_accessible_value_get (value));
}
else
{
if (GTK_IS_WIDGET (accessible))
parent = gtk_widget_get_parent (GTK_WIDGET (accessible));
else if (GTK_IS_STACK_PAGE (accessible))
parent = gtk_widget_get_parent (gtk_stack_page_get_child (GTK_STACK_PAGE (accessible)));
else
g_assert_not_reached ();
context = gtk_accessible_get_at_context (GTK_ACCESSIBLE (parent));
gtk_at_context_child_changed (context, change, accessible);
}
}
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);
break;
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);
break;
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);
break;
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);
emit_focus (self, state);
}
if (changed_platform & GTK_ACCESSIBLE_PLATFORM_CHANGE_ACTIVE)
{
gboolean state = gtk_accessible_get_platform_state (GTK_ACCESSIBLE (widget),
GTK_ACCESSIBLE_PLATFORM_STATE_ACTIVE);
emit_state_changed (self, "active", state);
/* Orca tracks the window:activate and window:deactivate events on top
* levels to decide whether to track other AT-SPI events
*/
if (gtk_accessible_get_accessible_role (accessible) == GTK_ACCESSIBLE_ROLE_WINDOW)
{
if (state)
emit_window_event (self, "activate");
else
emit_window_event (self, "deactivate");
}
}
}
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))
return;
if (child_context == NULL)
return;
/* 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;
}
parent_widget = GTK_WIDGET (accessible);
if (GTK_IS_STACK_PAGE (child))
child_widget = gtk_stack_page_get_child (GTK_STACK_PAGE (child));
else
child_widget = GTK_WIDGET (child);
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));
GTK_NOTE (A11Y, g_message ("Registered %d interfaces on object path '%s'",
self->n_registered_objects,
self->context_path));
}
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;
}
g_clear_pointer (&self->interfaces, g_variant_unref);
}
/* }}} */
/* {{{ GObject boilerplate */
static void
gtk_at_spi_context_finalize (GObject *gobject)
{
GtkAtSpiContext *self = GTK_AT_SPI_CONTEXT (gobject);
gtk_at_spi_context_unregister_object (self);
g_clear_object (&self->root);
g_free (self->context_path);
G_OBJECT_CLASS (gtk_at_spi_context_parent_class)->finalize (gobject);
}
static void
gtk_at_spi_context_constructed (GObject *gobject)
{
GtkAtSpiContext *self G_GNUC_UNUSED = GTK_AT_SPI_CONTEXT (gobject);
G_OBJECT_CLASS (gtk_at_spi_context_parent_class)->constructed (gobject);
}
static const char *get_bus_address (GdkDisplay *display);
static void
register_object (GtkAtSpiRoot *root,
GtkAtSpiContext *context)
{
GtkAccessible *accessible = gtk_at_context_get_accessible (GTK_AT_CONTEXT (context));
gtk_atspi_connect_text_signals (accessible,
(GtkAtspiTextChangedCallback *)emit_text_changed,
(GtkAtspiTextSelectionCallback *)emit_text_selection_changed,
context);
gtk_atspi_connect_selection_signals (accessible,
(GtkAtspiSelectionCallback *)emit_selection_changed,
context);
gtk_at_spi_context_register_object (context);
}
static void
gtk_at_spi_context_realize (GtkATContext *context)
{
GtkAtSpiContext *self = GTK_AT_SPI_CONTEXT (context);
GdkDisplay *display = gtk_at_context_get_display (context);
/* 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 a unique per-display connection
*/
self->root =
g_object_get_data (G_OBJECT (display), "-gtk-atspi-root");
if (self->root == NULL)
{
self->root = gtk_at_spi_root_new (get_bus_address (display));
g_object_set_data_full (G_OBJECT (display), "-gtk-atspi-root",
g_object_ref (self->root),
g_object_unref);
}
else
{
g_object_ref (self->root);
}
/* UUIDs use '-' as the separator, but that's not a valid character
* for a DBus object path
*/
char *uuid = g_uuid_string_random ();
size_t len = strlen (uuid);
for (size_t i = 0; i < len; i++)
{
if (uuid[i] == '-')
uuid[i] = '_';
}
self->context_path =
g_strconcat (gtk_at_spi_root_get_base_path (self->root), "/", uuid, NULL);
g_free (uuid);
self->connection = gtk_at_spi_root_get_connection (self->root);
if (self->connection == NULL)
return;
#ifdef G_ENABLE_DEBUG
if (GTK_DEBUG_CHECK (A11Y))
{
GtkAccessible *accessible = gtk_at_context_get_accessible (context);
GtkAccessibleRole role = gtk_at_context_get_accessible_role (context);
char *role_name = g_enum_to_string (GTK_TYPE_ACCESSIBLE_ROLE, role);
g_message ("Realizing ATSPI context “%s” for accessible “%s”, with role: “%s”",
self->context_path,
G_OBJECT_TYPE_NAME (accessible),
role_name);
g_free (role_name);
}
#endif
gtk_at_spi_root_queue_register (self->root, self, register_object);
}
static void
gtk_at_spi_context_unrealize (GtkATContext *context)
{
GtkAtSpiContext *self = GTK_AT_SPI_CONTEXT (context);
GtkAccessible *accessible = gtk_at_context_get_accessible (context);
GTK_NOTE (A11Y, g_message ("Unrealizing ATSPI context at '%s' for accessible '%s'",
self->context_path,
G_OBJECT_TYPE_NAME (accessible)));
/* Notify ATs that the accessible object is going away */
emit_defunct (self);
gtk_at_spi_root_unregister (self->root, self);
gtk_atspi_disconnect_text_signals (accessible);
gtk_atspi_disconnect_selection_signals (accessible);
gtk_at_spi_context_unregister_object (self);
g_clear_pointer (&self->context_path, g_free);
g_clear_object (&self->root);
}
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->finalize = gtk_at_spi_context_finalize;
context_class->realize = gtk_at_spi_context_realize;
context_class->unrealize = gtk_at_spi_context_unrealize;
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;
}
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)
{
GTK_NOTE (A11Y, g_message ("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)
{
GTK_NOTE (A11Y, g_message ("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)
{
const char *bus_address;
g_return_val_if_fail (GTK_IS_ACCESSIBLE (accessible), NULL);
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
bus_address = get_bus_address (display);
if (bus_address == NULL)
bus_address = "";
if (*bus_address == '\0')
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,
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,
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)
{
g_return_val_if_fail (GTK_IS_AT_SPI_CONTEXT (self), NULL);
if (self->context_path == NULL)
return gtk_at_spi_null_ref ();
const char *name = g_dbus_connection_get_unique_name (self->connection);
return g_variant_new ("(so)", name, self->context_path);
}
GVariant *
gtk_at_spi_context_get_interfaces (GtkAtSpiContext *self)
{
g_return_val_if_fail (GTK_IS_AT_SPI_CONTEXT (self), NULL);
return self->interfaces;
}
GVariant *
gtk_at_spi_context_get_states (GtkAtSpiContext *self)
{
GVariantBuilder builder = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("au"));
collect_states (self, &builder);
return g_variant_builder_end (&builder);
}
GVariant *
gtk_at_spi_context_get_parent_ref (GtkAtSpiContext *self)
{
g_return_val_if_fail (GTK_IS_AT_SPI_CONTEXT (self), NULL);
GtkAccessible *accessible = gtk_at_context_get_accessible (GTK_AT_CONTEXT (self));
return get_parent_context_ref (accessible);
}
GtkAtSpiRoot *
gtk_at_spi_context_get_root (GtkAtSpiContext *self)
{
g_return_val_if_fail (GTK_IS_AT_SPI_CONTEXT (self), NULL);
return self->root;
}
int
gtk_at_spi_context_get_index_in_parent (GtkAtSpiContext *self)
{
g_return_val_if_fail (GTK_IS_AT_SPI_CONTEXT (self), -1);
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));
return idx;
}
int
gtk_at_spi_context_get_child_count (GtkAtSpiContext *self)
{
g_return_val_if_fail (GTK_IS_AT_SPI_CONTEXT (self), -1);
GtkAccessible *accessible = gtk_at_context_get_accessible (GTK_AT_CONTEXT (self));
int n_children = -1;
if (GTK_IS_WIDGET (accessible))
{
GtkWidget *child;
n_children = 0;
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;
}
return n_children;
}
/* }}} */
/* vim:set foldmethod=marker expandtab: */
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