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gtk2/gtk/a11y/gtktextaccessible.c
Matthias Clasen b02db72e17 Rename GDK_MOD1_MASK to GDK_ALT_MASK 
We've hardcoded Mod1 = Alt for a long time, there is
no need to keep the confusing naming around anymore.
2020-04-06 01:40:49 -04:00

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/* GTK+ - accessibility implementations
* Copyright 2001, 2002, 2003 Sun Microsystems Inc.
*
* 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 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 "gdk/gdkeventsprivate.h"
#include <glib/gi18n-lib.h>
#include <string.h>
#include <gtk/gtk.h>
#include "gtkpango.h"
#include "gtktextaccessible.h"
#include "gtktextprivate.h"
#include "gtkcomboboxaccessible.h"
#include "gtkstylecontextprivate.h"
#include "gtkwidgetprivate.h"
struct _GtkTextAccessiblePrivate
{
gint cursor_position;
gint selection_bound;
};
/* Callbacks */
static void insert_text_cb (GtkEditable *editable,
gchar *new_text,
gint new_text_length,
gint *position);
static void delete_text_cb (GtkEditable *editable,
gint start,
gint end);
static gboolean check_for_selection_change (GtkTextAccessible *entry,
GtkText *gtk_text);
static void atk_editable_text_interface_init (AtkEditableTextIface *iface);
static void atk_text_interface_init (AtkTextIface *iface);
static void atk_action_interface_init (AtkActionIface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkTextAccessible, gtk_text_accessible, GTK_TYPE_WIDGET_ACCESSIBLE,
G_ADD_PRIVATE (GtkTextAccessible)
G_IMPLEMENT_INTERFACE (ATK_TYPE_EDITABLE_TEXT, atk_editable_text_interface_init)
G_IMPLEMENT_INTERFACE (ATK_TYPE_TEXT, atk_text_interface_init)
G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, atk_action_interface_init))
static AtkStateSet *
gtk_text_accessible_ref_state_set (AtkObject *accessible)
{
AtkStateSet *state_set;
gboolean value;
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (accessible));
if (widget == NULL)
return NULL;
state_set = ATK_OBJECT_CLASS (gtk_text_accessible_parent_class)->ref_state_set (accessible);
g_object_get (G_OBJECT (widget), "editable", &value, NULL);
if (value)
atk_state_set_add_state (state_set, ATK_STATE_EDITABLE);
atk_state_set_add_state (state_set, ATK_STATE_SINGLE_LINE);
return state_set;
}
static AtkAttributeSet *
gtk_text_accessible_get_attributes (AtkObject *accessible)
{
GtkWidget *widget;
AtkAttributeSet *attributes;
AtkAttribute *placeholder_text;
const gchar *text;
attributes = ATK_OBJECT_CLASS (gtk_text_accessible_parent_class)->get_attributes (accessible);
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (accessible));
if (widget == NULL)
return attributes;
text = gtk_text_get_placeholder_text (GTK_TEXT (widget));
if (text == NULL)
return attributes;
placeholder_text = g_malloc (sizeof (AtkAttribute));
placeholder_text->name = g_strdup ("placeholder-text");
placeholder_text->value = g_strdup (text);
attributes = g_slist_append (attributes, placeholder_text);
return attributes;
}
static void
gtk_text_accessible_initialize (AtkObject *obj,
gpointer data)
{
GtkText *entry;
GtkTextAccessible *gtk_text_accessible;
gint start_pos, end_pos;
ATK_OBJECT_CLASS (gtk_text_accessible_parent_class)->initialize (obj, data);
gtk_text_accessible = GTK_TEXT_ACCESSIBLE (obj);
entry = GTK_TEXT (data);
gtk_editable_get_selection_bounds (GTK_EDITABLE (entry), &start_pos, &end_pos);
gtk_text_accessible->priv->cursor_position = end_pos;
gtk_text_accessible->priv->selection_bound = start_pos;
/* Set up signal callbacks */
g_signal_connect_after (entry, "insert-text", G_CALLBACK (insert_text_cb), NULL);
g_signal_connect (entry, "delete-text", G_CALLBACK (delete_text_cb), NULL);
if (gtk_text_get_visibility (entry))
obj->role = ATK_ROLE_TEXT;
else
obj->role = ATK_ROLE_PASSWORD_TEXT;
}
static void
gtk_text_accessible_notify_gtk (GObject *obj,
GParamSpec *pspec)
{
GtkWidget *widget;
AtkObject* atk_obj;
GtkText* gtk_text;
GtkTextAccessible* entry;
widget = GTK_WIDGET (obj);
atk_obj = gtk_widget_get_accessible (widget);
gtk_text = GTK_TEXT (widget);
entry = GTK_TEXT_ACCESSIBLE (atk_obj);
if (g_strcmp0 (pspec->name, "cursor-position") == 0)
{
if (check_for_selection_change (entry, gtk_text))
g_signal_emit_by_name (atk_obj, "text-selection-changed");
/*
* The entry cursor position has moved so generate the signal.
*/
g_signal_emit_by_name (atk_obj, "text-caret-moved",
entry->priv->cursor_position);
}
else if (g_strcmp0 (pspec->name, "selection-bound") == 0)
{
if (check_for_selection_change (entry, gtk_text))
g_signal_emit_by_name (atk_obj, "text-selection-changed");
}
else if (g_strcmp0 (pspec->name, "editable") == 0)
{
gboolean value;
g_object_get (obj, "editable", &value, NULL);
atk_object_notify_state_change (atk_obj, ATK_STATE_EDITABLE, value);
}
else if (g_strcmp0 (pspec->name, "visibility") == 0)
{
gboolean visibility;
AtkRole new_role;
visibility = gtk_text_get_visibility (gtk_text);
new_role = visibility ? ATK_ROLE_TEXT : ATK_ROLE_PASSWORD_TEXT;
atk_object_set_role (atk_obj, new_role);
}
else
GTK_WIDGET_ACCESSIBLE_CLASS (gtk_text_accessible_parent_class)->notify_gtk (obj, pspec);
}
static gint
gtk_text_accessible_get_index_in_parent (AtkObject *accessible)
{
/*
* If the parent widget is a combo box then the index is 1
* otherwise do the normal thing.
*/
if (accessible->accessible_parent)
if (GTK_IS_COMBO_BOX_ACCESSIBLE (accessible->accessible_parent))
return 1;
return ATK_OBJECT_CLASS (gtk_text_accessible_parent_class)->get_index_in_parent (accessible);
}
static void
gtk_text_accessible_class_init (GtkTextAccessibleClass *klass)
{
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
GtkWidgetAccessibleClass *widget_class = (GtkWidgetAccessibleClass*)klass;
class->ref_state_set = gtk_text_accessible_ref_state_set;
class->get_index_in_parent = gtk_text_accessible_get_index_in_parent;
class->initialize = gtk_text_accessible_initialize;
class->get_attributes = gtk_text_accessible_get_attributes;
widget_class->notify_gtk = gtk_text_accessible_notify_gtk;
}
static void
gtk_text_accessible_init (GtkTextAccessible *entry)
{
entry->priv = gtk_text_accessible_get_instance_private (entry);
entry->priv->cursor_position = 0;
entry->priv->selection_bound = 0;
}
static gchar *
gtk_text_accessible_get_text (AtkText *atk_text,
gint start_pos,
gint end_pos)
{
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (atk_text));
if (widget == NULL)
return NULL;
return gtk_text_get_display_text (GTK_TEXT (widget), start_pos, end_pos);
}
static gchar *
gtk_text_accessible_get_text_before_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return NULL;
return _gtk_pango_get_text_before (gtk_text_get_layout (GTK_TEXT (widget)),
boundary_type, offset,
start_offset, end_offset);
}
static gchar *
gtk_text_accessible_get_text_at_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return NULL;
return _gtk_pango_get_text_at (gtk_text_get_layout (GTK_TEXT (widget)),
boundary_type, offset,
start_offset, end_offset);
}
static gchar *
gtk_text_accessible_get_text_after_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return NULL;
return _gtk_pango_get_text_after (gtk_text_get_layout (GTK_TEXT (widget)),
boundary_type, offset,
start_offset, end_offset);
}
static gint
gtk_text_accessible_get_character_count (AtkText *atk_text)
{
GtkWidget *widget;
gchar *text;
glong char_count;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (atk_text));
if (widget == NULL)
return 0;
text = gtk_text_get_display_text (GTK_TEXT (widget), 0, -1);
char_count = 0;
if (text)
{
char_count = g_utf8_strlen (text, -1);
g_free (text);
}
return char_count;
}
static gint
gtk_text_accessible_get_caret_offset (AtkText *text)
{
GtkWidget *widget;
gboolean result;
int cursor_position;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return -1;
result = gtk_editable_get_selection_bounds (GTK_EDITABLE (widget), NULL, &cursor_position);
if (!result)
return -1;
return cursor_position;
}
static gboolean
gtk_text_accessible_set_caret_offset (AtkText *text,
gint offset)
{
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return FALSE;
gtk_editable_set_position (GTK_EDITABLE (widget), offset);
return TRUE;
}
static AtkAttributeSet *
add_text_attribute (AtkAttributeSet *attributes,
AtkTextAttribute attr,
gint i)
{
AtkAttribute *at;
at = g_new (AtkAttribute, 1);
at->name = g_strdup (atk_text_attribute_get_name (attr));
at->value = g_strdup (atk_text_attribute_get_value (attr, i));
return g_slist_prepend (attributes, at);
}
static AtkAttributeSet *
gtk_text_accessible_get_run_attributes (AtkText *text,
gint offset,
gint *start_offset,
gint *end_offset)
{
GtkWidget *widget;
AtkAttributeSet *attributes;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return NULL;
attributes = NULL;
attributes = add_text_attribute (attributes, ATK_TEXT_ATTR_DIRECTION,
gtk_widget_get_direction (widget));
attributes = _gtk_pango_get_run_attributes (attributes,
gtk_text_get_layout (GTK_TEXT (widget)),
offset,
start_offset,
end_offset);
return attributes;
}
static AtkAttributeSet *
gtk_text_accessible_get_default_attributes (AtkText *text)
{
GtkWidget *widget;
AtkAttributeSet *attributes;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return NULL;
attributes = NULL;
attributes = add_text_attribute (attributes, ATK_TEXT_ATTR_DIRECTION,
gtk_widget_get_direction (widget));
attributes = _gtk_pango_get_default_attributes (attributes,
gtk_text_get_layout (GTK_TEXT (widget)));
attributes = _gtk_style_context_get_attributes (attributes,
gtk_widget_get_style_context (widget));
return attributes;
}
static void
gtk_text_accessible_get_character_extents (AtkText *text,
gint offset,
gint *x,
gint *y,
gint *width,
gint *height,
AtkCoordType coords)
{
GtkWidget *widget;
GtkText *entry;
PangoRectangle char_rect;
gchar *entry_text;
gint index, x_layout, y_layout;
GtkAllocation allocation;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return;
entry = GTK_TEXT (widget);
gtk_text_get_layout_offsets (entry, &x_layout, &y_layout);
entry_text = gtk_text_get_display_text (entry, 0, -1);
index = g_utf8_offset_to_pointer (entry_text, offset) - entry_text;
g_free (entry_text);
pango_layout_index_to_pos (gtk_text_get_layout (entry), index, &char_rect);
pango_extents_to_pixels (&char_rect, NULL);
gtk_widget_get_allocation (widget, &allocation);
*x = allocation.x + x_layout + char_rect.x;
*y = allocation.y + y_layout + char_rect.y;
*width = char_rect.width;
*height = char_rect.height;
}
static gint
gtk_text_accessible_get_offset_at_point (AtkText *atk_text,
gint x,
gint y,
AtkCoordType coords)
{
GtkWidget *widget;
GtkText *entry;
gchar *text;
gint index, x_layout, y_layout;
gint x_local, y_local;
glong offset;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (atk_text));
if (widget == NULL)
return -1;
entry = GTK_TEXT (widget);
gtk_text_get_layout_offsets (entry, &x_layout, &y_layout);
x_local = x - x_layout;
y_local = y - y_layout;
if (!pango_layout_xy_to_index (gtk_text_get_layout (entry),
x_local * PANGO_SCALE,
y_local * PANGO_SCALE,
&index, NULL))
{
if (x_local < 0 || y_local < 0)
index = 0;
else
index = -1;
}
offset = -1;
if (index != -1)
{
text = gtk_text_get_display_text (entry, 0, -1);
offset = g_utf8_pointer_to_offset (text, text + index);
g_free (text);
}
return offset;
}
static gint
gtk_text_accessible_get_n_selections (AtkText *text)
{
GtkWidget *widget;
gint start, end;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return 0;
if (gtk_editable_get_selection_bounds (GTK_EDITABLE (widget), &start, &end))
return 1;
return 0;
}
static gchar *
gtk_text_accessible_get_selection (AtkText *text,
gint selection_num,
gint *start_pos,
gint *end_pos)
{
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return NULL;
if (selection_num != 0)
return NULL;
if (gtk_editable_get_selection_bounds (GTK_EDITABLE (widget), start_pos, end_pos))
return gtk_editable_get_chars (GTK_EDITABLE (widget), *start_pos, *end_pos);
return NULL;
}
static gboolean
gtk_text_accessible_add_selection (AtkText *text,
gint start_pos,
gint end_pos)
{
GtkText *entry;
GtkWidget *widget;
gint start, end;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return FALSE;
entry = GTK_TEXT (widget);
if (!gtk_editable_get_selection_bounds (GTK_EDITABLE (entry), &start, &end))
{
gtk_editable_select_region (GTK_EDITABLE (entry), start_pos, end_pos);
return TRUE;
}
else
return FALSE;
}
static gboolean
gtk_text_accessible_remove_selection (AtkText *text,
gint selection_num)
{
GtkWidget *widget;
gint start, end;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return FALSE;
if (selection_num != 0)
return FALSE;
if (gtk_editable_get_selection_bounds (GTK_EDITABLE (widget), &start, &end))
{
gtk_editable_select_region (GTK_EDITABLE (widget), end, end);
return TRUE;
}
else
return FALSE;
}
static gboolean
gtk_text_accessible_set_selection (AtkText *text,
gint selection_num,
gint start_pos,
gint end_pos)
{
GtkWidget *widget;
gint start, end;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return FALSE;
if (selection_num != 0)
return FALSE;
if (gtk_editable_get_selection_bounds (GTK_EDITABLE (widget), &start, &end))
{
gtk_editable_select_region (GTK_EDITABLE (widget), start_pos, end_pos);
return TRUE;
}
else
return FALSE;
}
static gunichar
gtk_text_accessible_get_character_at_offset (AtkText *atk_text,
gint offset)
{
GtkWidget *widget;
gchar *text;
gchar *index;
gunichar result;
result = '\0';
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (atk_text));
if (widget == NULL)
return result;
if (!gtk_text_get_visibility (GTK_TEXT (widget)))
return result;
text = gtk_text_get_display_text (GTK_TEXT (widget), 0, -1);
if (offset < g_utf8_strlen (text, -1))
{
index = g_utf8_offset_to_pointer (text, offset);
result = g_utf8_get_char (index);
g_free (text);
}
return result;
}
static void
atk_text_interface_init (AtkTextIface *iface)
{
iface->get_text = gtk_text_accessible_get_text;
iface->get_character_at_offset = gtk_text_accessible_get_character_at_offset;
iface->get_text_before_offset = gtk_text_accessible_get_text_before_offset;
iface->get_text_at_offset = gtk_text_accessible_get_text_at_offset;
iface->get_text_after_offset = gtk_text_accessible_get_text_after_offset;
iface->get_caret_offset = gtk_text_accessible_get_caret_offset;
iface->set_caret_offset = gtk_text_accessible_set_caret_offset;
iface->get_character_count = gtk_text_accessible_get_character_count;
iface->get_n_selections = gtk_text_accessible_get_n_selections;
iface->get_selection = gtk_text_accessible_get_selection;
iface->add_selection = gtk_text_accessible_add_selection;
iface->remove_selection = gtk_text_accessible_remove_selection;
iface->set_selection = gtk_text_accessible_set_selection;
iface->get_run_attributes = gtk_text_accessible_get_run_attributes;
iface->get_default_attributes = gtk_text_accessible_get_default_attributes;
iface->get_character_extents = gtk_text_accessible_get_character_extents;
iface->get_offset_at_point = gtk_text_accessible_get_offset_at_point;
}
static void
gtk_text_accessible_set_text_contents (AtkEditableText *text,
const gchar *string)
{
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return;
if (!gtk_editable_get_editable (GTK_EDITABLE (widget)))
return;
gtk_editable_set_text (GTK_EDITABLE (widget), string);
}
static void
gtk_text_accessible_insert_text (AtkEditableText *text,
const gchar *string,
gint length,
gint *position)
{
GtkWidget *widget;
GtkEditable *editable;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return;
editable = GTK_EDITABLE (widget);
if (!gtk_editable_get_editable (editable))
return;
gtk_editable_insert_text (editable, string, length, position);
gtk_editable_set_position (editable, *position);
}
static void
gtk_text_accessible_copy_text (AtkEditableText *text,
gint start_pos,
gint end_pos)
{
GtkWidget *widget;
GtkEditable *editable;
gchar *str;
GdkClipboard *clipboard;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return;
editable = GTK_EDITABLE (widget);
str = gtk_editable_get_chars (editable, start_pos, end_pos);
clipboard = gtk_widget_get_clipboard (widget);
gdk_clipboard_set_text (clipboard, str);
g_free (str);
}
static void
gtk_text_accessible_cut_text (AtkEditableText *text,
gint start_pos,
gint end_pos)
{
GtkWidget *widget;
GtkEditable *editable;
gchar *str;
GdkClipboard *clipboard;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return;
editable = GTK_EDITABLE (widget);
if (!gtk_editable_get_editable (editable))
return;
str = gtk_editable_get_chars (editable, start_pos, end_pos);
clipboard = gtk_widget_get_clipboard (widget);
gdk_clipboard_set_text (clipboard, str);
gtk_editable_delete_text (editable, start_pos, end_pos);
}
static void
gtk_text_accessible_delete_text (AtkEditableText *text,
gint start_pos,
gint end_pos)
{
GtkWidget *widget;
GtkEditable *editable;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return;
editable = GTK_EDITABLE (widget);
if (!gtk_editable_get_editable (editable))
return;
gtk_editable_delete_text (editable, start_pos, end_pos);
}
typedef struct
{
GtkText* entry;
gint position;
} PasteData;
static void
paste_received_cb (GObject *clipboard,
GAsyncResult *result,
gpointer data)
{
PasteData *paste = data;
char *text;
text = gdk_clipboard_read_text_finish (GDK_CLIPBOARD (clipboard), result, NULL);
if (text)
gtk_editable_insert_text (GTK_EDITABLE (paste->entry), text, -1,
&paste->position);
g_object_unref (paste->entry);
g_free (paste);
g_free (text);
}
static void
gtk_text_accessible_paste_text (AtkEditableText *text,
gint position)
{
GtkWidget *widget;
GtkEditable *editable;
PasteData *paste;
GdkClipboard *clipboard;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return;
editable = GTK_EDITABLE (widget);
if (!gtk_editable_get_editable (editable))
return;
paste = g_new0 (PasteData, 1);
paste->entry = GTK_TEXT (widget);
paste->position = position;
g_object_ref (paste->entry);
clipboard = gtk_widget_get_clipboard (widget);
gdk_clipboard_read_text_async (clipboard, NULL, paste_received_cb, paste);
}
static void
atk_editable_text_interface_init (AtkEditableTextIface *iface)
{
iface->set_text_contents = gtk_text_accessible_set_text_contents;
iface->insert_text = gtk_text_accessible_insert_text;
iface->copy_text = gtk_text_accessible_copy_text;
iface->cut_text = gtk_text_accessible_cut_text;
iface->delete_text = gtk_text_accessible_delete_text;
iface->paste_text = gtk_text_accessible_paste_text;
iface->set_run_attributes = NULL;
}
static void
insert_text_cb (GtkEditable *editable,
gchar *new_text,
gint new_text_length,
gint *position)
{
GtkTextAccessible *accessible;
gint length;
if (new_text_length == 0)
return;
accessible = GTK_TEXT_ACCESSIBLE (gtk_widget_get_accessible (GTK_WIDGET (editable)));
length = g_utf8_strlen (new_text, new_text_length);
g_signal_emit_by_name (accessible,
"text-changed::insert",
*position - length,
length);
}
/* We connect to GtkEditable::delete-text, since it carries
* the information we need. But we delay emitting our own
* text_changed::delete signal until the entry has update
* all its internal state and emits GtkText::changed.
*/
static void
delete_text_cb (GtkEditable *editable,
gint start,
gint end)
{
GtkTextAccessible *accessible;
accessible = GTK_TEXT_ACCESSIBLE (gtk_widget_get_accessible (GTK_WIDGET (editable)));
if (end < 0)
{
gchar *text;
text = gtk_text_get_display_text (GTK_TEXT (editable), 0, -1);
end = g_utf8_strlen (text, -1);
g_free (text);
}
if (end == start)
return;
g_signal_emit_by_name (accessible,
"text-changed::delete",
start,
end - start);
}
static gboolean
check_for_selection_change (GtkTextAccessible *accessible,
GtkText *entry)
{
gboolean ret_val = FALSE;
gint start, end;
if (gtk_editable_get_selection_bounds (GTK_EDITABLE (entry), &start, &end))
{
if (end != accessible->priv->cursor_position ||
start != accessible->priv->selection_bound)
/*
* This check is here as this function can be called
* for notification of selection_bound and current_pos.
* The values of current_pos and selection_bound may be the same
* for both notifications and we only want to generate one
* text_selection_changed signal.
*/
ret_val = TRUE;
}
else
{
/* We had a selection */
ret_val = (accessible->priv->cursor_position != accessible->priv->selection_bound);
}
accessible->priv->cursor_position = end;
accessible->priv->selection_bound = start;
return ret_val;
}
static gboolean
gtk_text_accessible_do_action (AtkAction *action,
gint i)
{
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (action));
if (widget == NULL)
return FALSE;
if (!gtk_widget_get_sensitive (widget) || !gtk_widget_get_visible (widget))
return FALSE;
if (i != 0)
return FALSE;
gtk_widget_activate (widget);
return TRUE;
}
static gint
gtk_text_accessible_get_n_actions (AtkAction *action)
{
return 1;
}
static const gchar *
gtk_text_accessible_get_keybinding (AtkAction *action,
gint i)
{
GtkWidget *widget;
GtkWidget *label;
AtkRelationSet *set;
AtkRelation *relation;
GPtrArray *target;
gpointer target_object;
guint key_val;
if (i != 0)
return NULL;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (action));
if (widget == NULL)
return NULL;
set = atk_object_ref_relation_set (ATK_OBJECT (action));
if (!set)
return NULL;
label = NULL;
relation = atk_relation_set_get_relation_by_type (set, ATK_RELATION_LABELLED_BY);
if (relation)
{
target = atk_relation_get_target (relation);
target_object = g_ptr_array_index (target, 0);
label = gtk_accessible_get_widget (GTK_ACCESSIBLE (target_object));
}
g_object_unref (set);
if (GTK_IS_LABEL (label))
{
key_val = gtk_label_get_mnemonic_keyval (GTK_LABEL (label));
if (key_val != GDK_KEY_VoidSymbol)
return gtk_accelerator_name (key_val, GDK_ALT_MASK);
}
return NULL;
}
static const gchar*
gtk_text_accessible_action_get_name (AtkAction *action,
gint i)
{
if (i == 0)
return "activate";
return NULL;
}
static const gchar*
gtk_text_accessible_action_get_localized_name (AtkAction *action,
gint i)
{
if (i == 0)
return C_("Action name", "Activate");
return NULL;
}
static const gchar*
gtk_text_accessible_action_get_description (AtkAction *action,
gint i)
{
if (i == 0)
return C_("Action description", "Activates the entry");
return NULL;
}
static void
atk_action_interface_init (AtkActionIface *iface)
{
iface->do_action = gtk_text_accessible_do_action;
iface->get_n_actions = gtk_text_accessible_get_n_actions;
iface->get_keybinding = gtk_text_accessible_get_keybinding;
iface->get_name = gtk_text_accessible_action_get_name;
iface->get_localized_name = gtk_text_accessible_action_get_localized_name;
iface->get_description = gtk_text_accessible_action_get_description;
}
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