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gtk2/gtk/a11y/gtklabelaccessible.c
Florian Müllner 593b75fb69 GtkLabelAccessible: Initialize link before setting parent 
Since at-spi-atk commit 96621a5e95 fixed PropertyChange notifications
for AccessibleParent, setting the parent will result in a call to
ref_state_set() which assumes that the object is fully initialized.

https://bugzilla.gnome.org/show_bug.cgi?id=774939
2016-11-23 18:55:42 -05:00

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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/>.
*/
/* Preamble {{{1 */
#include "config.h"
#include <gtk/gtk.h>
#include <gtk/gtkpango.h>
#include "gtkwidgetprivate.h"
#include "gtklabelprivate.h"
#include "gtklabelaccessible.h"
#include "gtklabelaccessibleprivate.h"
#include "gtkstylecontextprivate.h"
struct _GtkLabelAccessiblePrivate
{
gint cursor_position;
gint selection_bound;
GList *links;
};
typedef struct _GtkLabelAccessibleLink GtkLabelAccessibleLink;
typedef struct _GtkLabelAccessibleLinkClass GtkLabelAccessibleLinkClass;
struct _GtkLabelAccessibleLink
{
AtkHyperlink parent;
GtkLabelAccessible *label;
gint index;
gboolean focused;
};
struct _GtkLabelAccessibleLinkClass
{
AtkHyperlinkClass parent_class;
};
static GtkLabelAccessibleLink *gtk_label_accessible_link_new (GtkLabelAccessible *label,
gint idx);
typedef struct _GtkLabelAccessibleLinkImpl GtkLabelAccessibleLinkImpl;
typedef struct _GtkLabelAccessibleLinkImplClass GtkLabelAccessibleLinkImplClass;
struct _GtkLabelAccessibleLinkImpl
{
AtkObject parent;
GtkLabelAccessibleLink *link;
};
struct _GtkLabelAccessibleLinkImplClass
{
AtkObjectClass parent_class;
};
/* GtkLabelAccessibleLinkImpl {{{1 */
GType _gtk_label_accessible_link_impl_get_type (void);
static void atk_hyperlink_impl_interface_init (AtkHyperlinkImplIface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkLabelAccessibleLinkImpl, _gtk_label_accessible_link_impl, ATK_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (ATK_TYPE_HYPERLINK_IMPL, atk_hyperlink_impl_interface_init))
static AtkHyperlink *
gtk_label_accessible_link_impl_get_hyperlink (AtkHyperlinkImpl *atk_impl)
{
GtkLabelAccessibleLinkImpl *impl = (GtkLabelAccessibleLinkImpl *)atk_impl;
return g_object_ref (impl->link);
}
static void
atk_hyperlink_impl_interface_init (AtkHyperlinkImplIface *iface)
{
iface->get_hyperlink = gtk_label_accessible_link_impl_get_hyperlink;
}
static AtkStateSet *
gtk_label_accessible_link_impl_ref_state_set (AtkObject *obj)
{
AtkStateSet *state_set;
GtkLabelAccessibleLink *link;
GtkWidget *widget;
link = ((GtkLabelAccessibleLinkImpl *)obj)->link;
state_set = atk_object_ref_state_set (atk_object_get_parent (obj));
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (atk_object_get_parent (obj)));
if (widget)
{
if (gtk_widget_get_can_focus (widget))
{
atk_state_set_add_state (state_set, ATK_STATE_FOCUSABLE);
if (_gtk_label_get_link_focused (GTK_LABEL (widget), link->index))
atk_state_set_add_state (state_set, ATK_STATE_FOCUSED);
else
atk_state_set_remove_state (state_set, ATK_STATE_FOCUSED);
}
if (_gtk_label_get_link_visited (GTK_LABEL (widget), link->index))
atk_state_set_add_state (state_set, ATK_STATE_VISITED);
}
return state_set;
}
static void
_gtk_label_accessible_link_impl_init (GtkLabelAccessibleLinkImpl *impl)
{
atk_object_set_role (ATK_OBJECT (impl), ATK_ROLE_LINK);
}
static void
_gtk_label_accessible_link_impl_finalize (GObject *obj)
{
GtkLabelAccessibleLinkImpl *impl = (GtkLabelAccessibleLinkImpl *)obj;
g_object_unref (impl->link);
G_OBJECT_CLASS (_gtk_label_accessible_link_impl_parent_class)->finalize (obj);
}
static void
_gtk_label_accessible_link_impl_class_init (GtkLabelAccessibleLinkImplClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
AtkObjectClass *atk_obj_class = ATK_OBJECT_CLASS (class);
object_class->finalize = _gtk_label_accessible_link_impl_finalize;
atk_obj_class->ref_state_set = gtk_label_accessible_link_impl_ref_state_set;
}
/* 'Public' API {{{2 */
static GtkLabelAccessibleLinkImpl *
gtk_label_accessible_link_impl_new (GtkLabelAccessible *label,
gint idx)
{
GtkLabelAccessibleLinkImpl *impl;
impl = g_object_new (_gtk_label_accessible_link_impl_get_type (), NULL);
impl->link = gtk_label_accessible_link_new (label, idx);
atk_object_set_parent (ATK_OBJECT (impl), ATK_OBJECT (label));
return impl;
}
/* GtkLabelAccessibleLink {{{1 */
GType _gtk_label_accessible_link_get_type (void);
static void atk_action_interface_init (AtkActionIface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkLabelAccessibleLink, _gtk_label_accessible_link, ATK_TYPE_HYPERLINK,
G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, atk_action_interface_init))
static gchar *
gtk_label_accessible_link_get_uri (AtkHyperlink *atk_link,
gint i)
{
GtkLabelAccessibleLink *link = (GtkLabelAccessibleLink *)atk_link;
GtkWidget *widget;
const gchar *uri;
g_return_val_if_fail (i == 0, NULL);
if (link->label == NULL)
return NULL;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (link->label));
uri = _gtk_label_get_link_uri (GTK_LABEL (widget), link->index);
return g_strdup (uri);
}
static gint
gtk_label_accessible_link_get_n_anchors (AtkHyperlink *atk_link)
{
return 1;
}
static gboolean
gtk_label_accessible_link_is_valid (AtkHyperlink *atk_link)
{
return TRUE;
}
static AtkObject *
gtk_label_accessible_link_get_object (AtkHyperlink *atk_link,
gint i)
{
GtkLabelAccessibleLink *link = (GtkLabelAccessibleLink *)atk_link;
g_return_val_if_fail (i == 0, NULL);
return ATK_OBJECT (link->label);
}
static gint
gtk_label_accessible_link_get_start_index (AtkHyperlink *atk_link)
{
GtkLabelAccessibleLink *link = (GtkLabelAccessibleLink *)atk_link;
GtkWidget *widget;
gint start, end;
if (link->label == NULL)
return 0;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (link->label));
_gtk_label_get_link_extent (GTK_LABEL (widget), link->index, &start, &end);
return start;
}
static gint
gtk_label_accessible_link_get_end_index (AtkHyperlink *atk_link)
{
GtkLabelAccessibleLink *link = (GtkLabelAccessibleLink *)atk_link;
GtkWidget *widget;
gint start, end;
if (link->label == NULL)
return 0;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (link->label));
_gtk_label_get_link_extent (GTK_LABEL (widget), link->index, &start, &end);
return end;
}
static void
_gtk_label_accessible_link_init (GtkLabelAccessibleLink *link)
{
}
static void
_gtk_label_accessible_link_class_init (GtkLabelAccessibleLinkClass *class)
{
AtkHyperlinkClass *atk_link_class = ATK_HYPERLINK_CLASS (class);
atk_link_class->get_uri = gtk_label_accessible_link_get_uri;
atk_link_class->get_n_anchors = gtk_label_accessible_link_get_n_anchors;
atk_link_class->is_valid = gtk_label_accessible_link_is_valid;
atk_link_class->get_object = gtk_label_accessible_link_get_object;
atk_link_class->get_start_index = gtk_label_accessible_link_get_start_index;
atk_link_class->get_end_index = gtk_label_accessible_link_get_end_index;
}
/* 'Public' API {{{2 */
static GtkLabelAccessibleLink *
gtk_label_accessible_link_new (GtkLabelAccessible *label,
gint idx)
{
GtkLabelAccessibleLink *link;
link = g_object_new (_gtk_label_accessible_link_get_type (), NULL);
link->label = label;
link->index = idx;
return link;
}
/* AtkAction implementation {{{2 */
static gboolean
gtk_label_accessible_link_do_action (AtkAction *action,
gint i)
{
GtkLabelAccessibleLink *link = (GtkLabelAccessibleLink *)action;
GtkWidget *widget;
if (i != 0)
return FALSE;
if (link->label == NULL)
return FALSE;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (link->label));
if (widget == NULL)
return FALSE;
if (!gtk_widget_is_sensitive (widget) || !gtk_widget_get_visible (widget))
return FALSE;
_gtk_label_activate_link (GTK_LABEL (widget), link->index);
return TRUE;
}
static gint
gtk_label_accessible_link_get_n_actions (AtkAction *action)
{
return 1;
}
static const gchar *
gtk_label_accessible_link_get_name (AtkAction *action,
gint i)
{
if (i != 0)
return NULL;
return "activate";
}
static void
atk_action_interface_init (AtkActionIface *iface)
{
iface->do_action = gtk_label_accessible_link_do_action;
iface->get_n_actions = gtk_label_accessible_link_get_n_actions;
iface->get_name = gtk_label_accessible_link_get_name;
}
/* GtkLabelAccessible {{{1 */
static void atk_text_interface_init (AtkTextIface *iface);
static void atk_hypertext_interface_init (AtkHypertextIface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkLabelAccessible, gtk_label_accessible, GTK_TYPE_WIDGET_ACCESSIBLE,
G_ADD_PRIVATE (GtkLabelAccessible)
G_IMPLEMENT_INTERFACE (ATK_TYPE_TEXT, atk_text_interface_init)
G_IMPLEMENT_INTERFACE (ATK_TYPE_HYPERTEXT, atk_hypertext_interface_init))
static void
gtk_label_accessible_init (GtkLabelAccessible *label)
{
label->priv = gtk_label_accessible_get_instance_private (label);
}
static void
gtk_label_accessible_initialize (AtkObject *obj,
gpointer data)
{
GtkWidget *widget;
ATK_OBJECT_CLASS (gtk_label_accessible_parent_class)->initialize (obj, data);
widget = GTK_WIDGET (data);
_gtk_label_accessible_update_links (GTK_LABEL (widget));
/* Check whether ancestor of GtkLabel is a GtkButton
* and if so set accessible parent for GtkLabelAccessible
*/
while (widget != NULL)
{
widget = gtk_widget_get_parent (widget);
if (GTK_IS_BUTTON (widget))
{
atk_object_set_parent (obj, gtk_widget_get_accessible (widget));
break;
}
}
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->priv->cursor_position ||
start != accessible->priv->selection_bound)
ret_val = TRUE;
}
else
{
ret_val = (accessible->priv->cursor_position != accessible->priv->selection_bound);
}
accessible->priv->cursor_position = end;
accessible->priv->selection_bound = start;
return ret_val;
}
static void
gtk_label_accessible_notify_gtk (GObject *obj,
GParamSpec *pspec)
{
GtkWidget *widget = GTK_WIDGET (obj);
AtkObject* atk_obj = gtk_widget_get_accessible (widget);
GtkLabelAccessible *accessible;
accessible = GTK_LABEL_ACCESSIBLE (atk_obj);
if (g_strcmp0 (pspec->name, "cursor-position") == 0)
{
g_signal_emit_by_name (atk_obj, "text-caret-moved",
_gtk_label_get_cursor_position (GTK_LABEL (widget)));
if (check_for_selection_change (accessible, GTK_LABEL (widget)))
g_signal_emit_by_name (atk_obj, "text-selection-changed");
}
else if (g_strcmp0 (pspec->name, "selection-bound") == 0)
{
if (check_for_selection_change (accessible, 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);
}
/* atkobject.h */
static AtkStateSet *
gtk_label_accessible_ref_state_set (AtkObject *accessible)
{
AtkStateSet *state_set;
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (accessible));
if (widget == NULL)
return NULL;
state_set = ATK_OBJECT_CLASS (gtk_label_accessible_parent_class)->ref_state_set (accessible);
atk_state_set_add_state (state_set, ATK_STATE_MULTI_LINE);
return state_set;
}
static AtkRelationSet *
gtk_label_accessible_ref_relation_set (AtkObject *obj)
{
GtkWidget *widget;
AtkRelationSet *relation_set;
g_return_val_if_fail (GTK_IS_LABEL_ACCESSIBLE (obj), NULL);
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
if (widget == NULL)
return NULL;
relation_set = ATK_OBJECT_CLASS (gtk_label_accessible_parent_class)->ref_relation_set (obj);
if (!atk_relation_set_contains (relation_set, ATK_RELATION_LABEL_FOR))
{
/* Get the mnemonic widget.
* The relation set is not updated if the mnemonic widget is changed
*/
GtkWidget *mnemonic_widget;
mnemonic_widget = gtk_label_get_mnemonic_widget (GTK_LABEL (widget));
if (mnemonic_widget)
{
AtkObject *accessible_array[1];
AtkRelation* relation;
if (!gtk_widget_get_can_focus (mnemonic_widget))
{
/*
* Handle the case where a GtkFileChooserButton is specified
* as the mnemonic widget. use the combobox which is a child of the
* GtkFileChooserButton as the mnemonic widget. See bug #359843.
*/
if (GTK_IS_BOX (mnemonic_widget))
{
GList *list, *tmpl;
list = gtk_container_get_children (GTK_CONTAINER (mnemonic_widget));
if (g_list_length (list) == 2)
{
tmpl = g_list_last (list);
if (GTK_IS_COMBO_BOX(tmpl->data))
{
mnemonic_widget = GTK_WIDGET(tmpl->data);
}
}
g_list_free (list);
}
}
accessible_array[0] = gtk_widget_get_accessible (mnemonic_widget);
relation = atk_relation_new (accessible_array, 1,
ATK_RELATION_LABEL_FOR);
atk_relation_set_add (relation_set, relation);
/*
* Unref the relation so that it is not leaked.
*/
g_object_unref (relation);
}
}
return relation_set;
}
static const gchar*
gtk_label_accessible_get_name (AtkObject *accessible)
{
const gchar *name;
g_return_val_if_fail (GTK_IS_LABEL_ACCESSIBLE (accessible), NULL);
name = ATK_OBJECT_CLASS (gtk_label_accessible_parent_class)->get_name (accessible);
if (name != NULL)
return name;
else
{
/*
* Get the text on the label
*/
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (accessible));
if (widget == NULL)
return NULL;
g_return_val_if_fail (GTK_IS_LABEL (widget), NULL);
return gtk_label_get_text (GTK_LABEL (widget));
}
}
static gint
gtk_label_accessible_get_n_children (AtkObject *obj)
{
GtkLabelAccessible *accessible = GTK_LABEL_ACCESSIBLE (obj);
return g_list_length (accessible->priv->links);
}
static AtkObject *
gtk_label_accessible_ref_child (AtkObject *obj,
gint idx)
{
GtkLabelAccessible *accessible = GTK_LABEL_ACCESSIBLE (obj);
AtkObject *child;
child = g_list_nth_data (accessible->priv->links, idx);
if (child)
g_object_ref (child);
return child;
}
static void clear_links (GtkLabelAccessible *accessible);
static void
gtk_label_accessible_finalize (GObject *obj)
{
GtkLabelAccessible *accessible = GTK_LABEL_ACCESSIBLE (obj);
clear_links (accessible);
G_OBJECT_CLASS (gtk_label_accessible_parent_class)->finalize (obj);
}
static void
gtk_label_accessible_class_init (GtkLabelAccessibleClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
GtkWidgetAccessibleClass *widget_class = GTK_WIDGET_ACCESSIBLE_CLASS (klass);
object_class->finalize = gtk_label_accessible_finalize;
class->get_name = gtk_label_accessible_get_name;
class->ref_state_set = gtk_label_accessible_ref_state_set;
class->ref_relation_set = gtk_label_accessible_ref_relation_set;
class->initialize = gtk_label_accessible_initialize;
class->get_n_children = gtk_label_accessible_get_n_children;
class->ref_child = gtk_label_accessible_ref_child;
widget_class->notify_gtk = gtk_label_accessible_notify_gtk;
}
/* 'Public' API {{{2 */
void
_gtk_label_accessible_text_deleted (GtkLabel *label)
{
AtkObject *obj;
const char *text;
guint length;
obj = _gtk_widget_peek_accessible (GTK_WIDGET (label));
if (obj == NULL)
return;
text = gtk_label_get_text (label);
length = g_utf8_strlen (text, -1);
if (length > 0)
g_signal_emit_by_name (obj, "text-changed::delete", 0, length);
}
void
_gtk_label_accessible_text_inserted (GtkLabel *label)
{
AtkObject *obj;
const char *text;
guint length;
obj = _gtk_widget_peek_accessible (GTK_WIDGET (label));
if (obj == NULL)
return;
text = gtk_label_get_text (label);
length = g_utf8_strlen (text, -1);
if (length > 0)
g_signal_emit_by_name (obj, "text-changed::insert", 0, length);
if (obj->name == NULL)
/* The label has changed so notify a change in accessible-name */
g_object_notify (G_OBJECT (obj), "accessible-name");
g_signal_emit_by_name (obj, "visible-data-changed");
}
static void
clear_links (GtkLabelAccessible *accessible)
{
GList *l;
gint i;
GtkLabelAccessibleLinkImpl *impl;
for (l = accessible->priv->links, i = 0; l; l = l->next, i++)
{
impl = l->data;
g_signal_emit_by_name (accessible, "children-changed::remove", i, impl, NULL);
atk_object_set_parent (ATK_OBJECT (impl), NULL);
impl->link->label = NULL;
}
g_list_free_full (accessible->priv->links, g_object_unref);
accessible->priv->links = NULL;
}
static void
create_links (GtkLabelAccessible *accessible)
{
GtkWidget *widget;
gint n, i;
GtkLabelAccessibleLinkImpl *impl;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (accessible));
n = _gtk_label_get_n_links (GTK_LABEL (widget));
for (i = 0; i < n; i++)
{
impl = gtk_label_accessible_link_impl_new (accessible, i);
accessible->priv->links = g_list_append (accessible->priv->links, impl);
g_signal_emit_by_name (accessible, "children-changed::add", i, impl, NULL);
}
}
void
_gtk_label_accessible_update_links (GtkLabel *label)
{
AtkObject *obj;
obj = _gtk_widget_peek_accessible (GTK_WIDGET (label));
if (obj == NULL)
return;
clear_links (GTK_LABEL_ACCESSIBLE (obj));
create_links (GTK_LABEL_ACCESSIBLE (obj));
}
void
_gtk_label_accessible_focus_link_changed (GtkLabel *label)
{
AtkObject *obj;
GtkLabelAccessible *accessible;
GList *l;
GtkLabelAccessibleLinkImpl *impl;
gboolean focused;
obj = _gtk_widget_peek_accessible (GTK_WIDGET (label));
if (obj == NULL)
return;
accessible = GTK_LABEL_ACCESSIBLE (obj);
for (l = accessible->priv->links; l; l = l->next)
{
impl = l->data;
focused = _gtk_label_get_link_focused (label, impl->link->index);
if (impl->link->focused != focused)
{
impl->link->focused = focused;
atk_object_notify_state_change (ATK_OBJECT (impl), ATK_STATE_FOCUSED, focused);
}
}
}
/* AtkText implementation {{{2 */
static gchar*
gtk_label_accessible_get_text (AtkText *atk_text,
gint start_pos,
gint end_pos)
{
GtkWidget *widget;
const gchar *text;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (atk_text));
if (widget == NULL)
return NULL;
text = gtk_label_get_text (GTK_LABEL (widget));
if (text)
{
guint length;
const gchar *start, *end;
length = g_utf8_strlen (text, -1);
if (end_pos < 0 || end_pos > length)
end_pos = length;
if (start_pos > length)
start_pos = length;
if (end_pos <= start_pos)
return g_strdup ("");
start = g_utf8_offset_to_pointer (text, start_pos);
end = g_utf8_offset_to_pointer (start, end_pos - start_pos);
return g_strndup (start, end - start);
}
return NULL;
}
static gchar *
gtk_label_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_label_get_layout (GTK_LABEL (widget)),
boundary_type, offset,
start_offset, end_offset);
}
static gchar*
gtk_label_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_label_get_layout (GTK_LABEL (widget)),
boundary_type, offset,
start_offset, end_offset);
}
static gchar*
gtk_label_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_label_get_layout (GTK_LABEL (widget)),
boundary_type, offset,
start_offset, end_offset);
}
static gint
gtk_label_accessible_get_character_count (AtkText *atk_text)
{
GtkWidget *widget;
const gchar *text;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (atk_text));
if (widget == NULL)
return 0;
text = gtk_label_get_text (GTK_LABEL (widget));
if (text)
return g_utf8_strlen (text, -1);
return 0;
}
static gint
gtk_label_accessible_get_caret_offset (AtkText *text)
{
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return 0;
return _gtk_label_get_cursor_position (GTK_LABEL (widget));
}
static gboolean
gtk_label_accessible_set_caret_offset (AtkText *text,
gint offset)
{
GtkWidget *widget;
GtkLabel *label;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return FALSE;
label = GTK_LABEL (widget);
if (!gtk_label_get_selectable (label))
return FALSE;
gtk_label_select_region (label, offset, offset);
return TRUE;
}
static gint
gtk_label_accessible_get_n_selections (AtkText *text)
{
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return 0;
if (gtk_label_get_selection_bounds (GTK_LABEL (widget), NULL, NULL))
return 1;
return 0;
}
static gchar *
gtk_label_accessible_get_selection (AtkText *atk_text,
gint selection_num,
gint *start_pos,
gint *end_pos)
{
GtkWidget *widget;
GtkLabel *label;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (atk_text));
if (widget == NULL)
return NULL;
if (selection_num != 0)
return NULL;
label = GTK_LABEL (widget);
if (gtk_label_get_selection_bounds (label, start_pos, end_pos))
{
const gchar *text;
text = gtk_label_get_text (label);
if (text)
return g_utf8_substring (text, *start_pos, *end_pos);
}
return NULL;
}
static gboolean
gtk_label_accessible_add_selection (AtkText *text,
gint start_pos,
gint end_pos)
{
GtkWidget *widget;
GtkLabel *label;
gint start, end;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return FALSE;
label = GTK_LABEL (widget);
if (!gtk_label_get_selectable (label))
return FALSE;
if (!gtk_label_get_selection_bounds (label, &start, &end))
{
gtk_label_select_region (label, start_pos, end_pos);
return TRUE;
}
else
return FALSE;
}
static gboolean
gtk_label_accessible_remove_selection (AtkText *text,
gint selection_num)
{
GtkWidget *widget;
GtkLabel *label;
gint start, end;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return FALSE;
if (selection_num != 0)
return FALSE;
label = GTK_LABEL (widget);
if (!gtk_label_get_selectable (label))
return FALSE;
if (gtk_label_get_selection_bounds (label, &start, &end))
{
gtk_label_select_region (label, end, end);
return TRUE;
}
else
return FALSE;
}
static gboolean
gtk_label_accessible_set_selection (AtkText *text,
gint selection_num,
gint start_pos,
gint end_pos)
{
GtkWidget *widget;
GtkLabel *label;
gint start, end;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return FALSE;
if (selection_num != 0)
return FALSE;
label = GTK_LABEL (widget);
if (!gtk_label_get_selectable (label))
return FALSE;
if (gtk_label_get_selection_bounds (label, &start, &end))
{
gtk_label_select_region (label, start_pos, end_pos);
return TRUE;
}
else
return FALSE;
}
static void
gtk_label_accessible_get_character_extents (AtkText *text,
gint offset,
gint *x,
gint *y,
gint *width,
gint *height,
AtkCoordType coords)
{
GtkWidget *widget;
GtkLabel *label;
PangoRectangle char_rect;
const gchar *label_text;
gint index, x_layout, y_layout;
GdkWindow *window;
gint x_window, y_window;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
if (widget == NULL)
return;
label = GTK_LABEL (widget);
gtk_label_get_layout_offsets (label, &x_layout, &y_layout);
label_text = gtk_label_get_text (label);
index = g_utf8_offset_to_pointer (label_text, offset) - label_text;
pango_layout_index_to_pos (gtk_label_get_layout (label), index, &char_rect);
pango_extents_to_pixels (&char_rect, NULL);
window = gtk_widget_get_window (widget);
gdk_window_get_origin (window, &x_window, &y_window);
*x = x_window + x_layout + char_rect.x;
*y = y_window + y_layout + char_rect.y;
*width = char_rect.width;
*height = char_rect.height;
if (coords == ATK_XY_WINDOW)
{
window = gdk_window_get_toplevel (window);
gdk_window_get_origin (window, &x_window, &y_window);
*x -= x_window;
*y -= y_window;
}
}
static gint
gtk_label_accessible_get_offset_at_point (AtkText *atk_text,
gint x,
gint y,
AtkCoordType coords)
{
GtkWidget *widget;
GtkLabel *label;
const gchar *text;
gint index, x_layout, y_layout;
gint x_window, y_window;
gint x_local, y_local;
GdkWindow *window;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (atk_text));
if (widget == NULL)
return -1;
label = GTK_LABEL (widget);
gtk_label_get_layout_offsets (label, &x_layout, &y_layout);
window = gtk_widget_get_window (widget);
gdk_window_get_origin (window, &x_window, &y_window);
x_local = x - x_layout - x_window;
y_local = y - y_layout - y_window;
if (coords == ATK_XY_WINDOW)
{
window = gdk_window_get_toplevel (window);
gdk_window_get_origin (window, &x_window, &y_window);
x_local += x_window;
y_local += y_window;
}
if (!pango_layout_xy_to_index (gtk_label_get_layout (label),
x_local * PANGO_SCALE,
y_local * PANGO_SCALE,
&index, NULL))
{
if (x_local < 0 || y_local < 0)
index = 0;
else
index = -1;
}
if (index != -1)
{
text = gtk_label_get_text (label);
return g_utf8_pointer_to_offset (text, text + index);
}
return -1;
}
static AtkAttributeSet *
add_attribute (AtkAttributeSet *attributes,
AtkTextAttribute attr,
const gchar *value)
{
AtkAttribute *at;
at = g_new (AtkAttribute, 1);
at->name = g_strdup (atk_text_attribute_get_name (attr));
at->value = g_strdup (value);
return g_slist_prepend (attributes, at);
}
static AtkAttributeSet*
gtk_label_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_attribute (attributes, ATK_TEXT_ATTR_DIRECTION,
atk_text_attribute_get_value (ATK_TEXT_ATTR_DIRECTION,
gtk_widget_get_direction (widget)));
attributes = _gtk_pango_get_run_attributes (attributes,
gtk_label_get_layout (GTK_LABEL (widget)),
offset,
start_offset,
end_offset);
return attributes;
}
static AtkAttributeSet *
gtk_label_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_attribute (attributes, ATK_TEXT_ATTR_DIRECTION,
atk_text_attribute_get_value (ATK_TEXT_ATTR_DIRECTION,
gtk_widget_get_direction (widget)));
attributes = _gtk_pango_get_default_attributes (attributes,
gtk_label_get_layout (GTK_LABEL (widget)));
attributes = _gtk_style_context_get_attributes (attributes,
gtk_widget_get_style_context (widget));
return attributes;
}
static gunichar
gtk_label_accessible_get_character_at_offset (AtkText *atk_text,
gint offset)
{
GtkWidget *widget;
const gchar *text;
gchar *index;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (atk_text));
if (widget == NULL)
return '\0';
text = gtk_label_get_text (GTK_LABEL (widget));
if (offset >= g_utf8_strlen (text, -1))
return '\0';
index = g_utf8_offset_to_pointer (text, offset);
return g_utf8_get_char (index);
}
static void
atk_text_interface_init (AtkTextIface *iface)
{
iface->get_text = gtk_label_accessible_get_text;
iface->get_character_at_offset = gtk_label_accessible_get_character_at_offset;
iface->get_text_before_offset = gtk_label_accessible_get_text_before_offset;
iface->get_text_at_offset = gtk_label_accessible_get_text_at_offset;
iface->get_text_after_offset = gtk_label_accessible_get_text_after_offset;
iface->get_character_count = gtk_label_accessible_get_character_count;
iface->get_caret_offset = gtk_label_accessible_get_caret_offset;
iface->set_caret_offset = gtk_label_accessible_set_caret_offset;
iface->get_n_selections = gtk_label_accessible_get_n_selections;
iface->get_selection = gtk_label_accessible_get_selection;
iface->add_selection = gtk_label_accessible_add_selection;
iface->remove_selection = gtk_label_accessible_remove_selection;
iface->set_selection = gtk_label_accessible_set_selection;
iface->get_character_extents = gtk_label_accessible_get_character_extents;
iface->get_offset_at_point = gtk_label_accessible_get_offset_at_point;
iface->get_run_attributes = gtk_label_accessible_get_run_attributes;
iface->get_default_attributes = gtk_label_accessible_get_default_attributes;
}
/* AtkHypertext implementation {{{2 */
static AtkHyperlink *
gtk_label_accessible_get_link (AtkHypertext *hypertext,
gint idx)
{
GtkLabelAccessible *label = GTK_LABEL_ACCESSIBLE (hypertext);
GtkLabelAccessibleLinkImpl *impl;
impl = (GtkLabelAccessibleLinkImpl *)g_list_nth_data (label->priv->links, idx);
if (impl)
return ATK_HYPERLINK (impl->link);
return NULL;
}
static gint
gtk_label_accessible_get_n_links (AtkHypertext *hypertext)
{
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (hypertext));
return _gtk_label_get_n_links (GTK_LABEL (widget));
}
static gint
gtk_label_accessible_get_link_index (AtkHypertext *hypertext,
gint char_index)
{
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (hypertext));
return _gtk_label_get_link_at (GTK_LABEL (widget), char_index);
}
static void
atk_hypertext_interface_init (AtkHypertextIface *iface)
{
iface->get_link = gtk_label_accessible_get_link;
iface->get_n_links = gtk_label_accessible_get_n_links;
iface->get_link_index = gtk_label_accessible_get_link_index;
}
/* vim:set foldmethod=marker expandtab: */
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