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a11y: Implement ChildrenChanged atspi.Event

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This commit is contained in:
Emmanuele Bassi 2020-10-21 14:33:20 +01:00
parent 8d46bd1d7c
commit f1e14c4858
1 changed files with 85 additions and 0 deletions
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85
gtk/a11y/gtkatspicontext.c
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@ -810,6 +810,41 @@ emit_bounds_changed (GtkAtSpiContext *self,
NULL);
}
static void
emit_children_changed (GtkAtSpiContext *self,
GtkAtSpiContext *child_context,
int idx,
GtkAccessibleChildState state)
{
const char *change;
switch (state)
{
case GTK_ACCESSIBLE_CHILD_STATE_ADDED:
change = "add";
break;
case GTK_ACCESSIBLE_CHILD_STATE_REMOVED:
change = "remove";
break;
default:
g_assert_not_reached ();
return;
}
GVariant *ref = gtk_at_spi_context_to_ref (child_context);
GVariant *context_ref = gtk_at_spi_context_to_ref (self);
g_dbus_connection_emit_signal (self->connection,
NULL,
self->context_path,
"org.a11y.atspi.Event.Object",
"ChildrenChanged",
g_variant_new ("(siiv@(so))", change, idx, 0, ref, context_ref),
NULL);
}
static void
gtk_at_spi_context_state_change (GtkATContext *ctx,
GtkAccessibleStateChange changed_states,
@ -1040,6 +1075,55 @@ gtk_at_spi_context_bounds_change (GtkATContext *ctx)
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;
if (!GTK_IS_WIDGET (accessible))
return;
child_context = gtk_accessible_get_at_context (child);
if (child_context == NULL)
return;
GtkWidget *parent_widget = GTK_WIDGET (accessible);
GtkWidget *child_widget = GTK_WIDGET (child);
int idx = 0;
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 (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
@ -1326,6 +1410,7 @@ gtk_at_spi_context_class_init (GtkAtSpiContextClass *klass)
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,