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GtkLabelAccessible: avoid extra selection-changed emissions

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This copies the same code that the entry accessible uses
to check for selection changes.

https://bugzilla.gnome.org/show_bug.cgi?id=654428
This commit is contained in:
Matthias Clasen 2011-07-16 09:44:02 -04:00
parent 7741f5a09a
commit 102faa3037
2 changed files with 35 additions and 6 deletions
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39
gtk/a11y/gtklabelaccessible.c
View File

@ -69,6 +69,31 @@ gtk_label_accessible_initialize (AtkObject *obj,
obj->role = ATK_ROLE_LABEL;
}
static gboolean
check_for_selection_change (GtkLabelAccessible *accessible,
GtkLabel *label)
{
gboolean ret_val = FALSE;
gint start, end;
if (gtk_label_get_selection_bounds (label, &start, &end))
{
if (end != accessible->cursor_position ||
start != accessible->selection_bound)
ret_val = TRUE;
}
else
{
ret_val = (accessible->cursor_position != accessible->selection_bound);
}
accessible->cursor_position = end;
accessible->selection_bound = start;
return ret_val;
}
static void
gtk_label_accessible_notify_gtk (GObject *obj,
GParamSpec *pspec)
@ -91,30 +116,32 @@ gtk_label_accessible_notify_gtk (GObject *obj,
/* Create a delete text and an insert text signal */
length = g_utf8_strlen (accessible->text, -1);
if (length > 0)
g_signal_emit_by_name (atk_obj, "text_changed::delete", 0, length);
g_signal_emit_by_name (atk_obj, "text-changed::delete", 0, length);
g_free (accessible->text);
accessible->text = g_strdup (text);
length = g_utf8_strlen (accessible->text, -1);
if (length > 0)
g_signal_emit_by_name (atk_obj, "text_changed::insert", 0, length);
g_signal_emit_by_name (atk_obj, "text-changed::insert", 0, length);
if (atk_obj->name == NULL)
/* The label has changed so notify a change in accessible-name */
g_object_notify (G_OBJECT (atk_obj), "accessible-name");
g_signal_emit_by_name (atk_obj, "visible_data_changed");
g_signal_emit_by_name (atk_obj, "visible-data-changed");
}
else if (g_strcmp0 (pspec->name, "cursor-position") == 0)
{
g_signal_emit_by_name (atk_obj, "text_caret_moved",
g_signal_emit_by_name (atk_obj, "text-caret-moved",
_gtk_label_get_cursor_position (GTK_LABEL (widget)));
g_signal_emit_by_name (atk_obj, "text_selection_changed");
if (check_for_selection_change (atk_obj, GTK_LABEL (widget)))
g_signal_emit_by_name (atk_obj, "text-selection-changed");
}
else if (g_strcmp0 (pspec->name, "selection-bound") == 0)
{
g_signal_emit_by_name (atk_obj, "text_selection_changed");
if (check_for_selection_change (atk_obj, GTK_LABEL (widget)))
g_signal_emit_by_name (atk_obj, "text-selection-changed");
}
else
GTK_WIDGET_ACCESSIBLE_CLASS (_gtk_label_accessible_parent_class)->notify_gtk (obj, pspec);

2
gtk/a11y/gtklabelaccessible.h
View File

@ -39,6 +39,8 @@ struct _GtkLabelAccessible
GtkWidgetAccessible parent;
gchar *text;
gint cursor_position;
gint selection_bound;
};
struct _GtkLabelAccessibleClass