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gtk2/gtk/a11y/gtkiconviewaccessible.c
Emmanuele Bassi fc512f0b9f a11y: Update the accessible state when GtkIconView:model changes 
Do not use a generic "notify" signal handler.

Additionally, clean up the GtkIconViewAccessible implementation to bring
it up with modern idiomatic GObject.
2020-06-05 20:35:10 +01:00

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/* GTK+ - accessibility implementations
* Copyright (C) 2002, 2004 Anders Carlsson <andersca@gnu.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkiconviewaccessibleprivate.h"
#include <string.h>
#include "gtk/gtkadjustment.h"
#include "gtk/gtkiconviewprivate.h"
#include "gtk/gtkcellrendererpixbuf.h"
#include "gtk/gtkcellrenderertext.h"
#include "gtk/gtkpango.h"
#include "gtk/gtkwidgetprivate.h"
#define GTK_TYPE_ICON_VIEW_ITEM_ACCESSIBLE (_gtk_icon_view_item_accessible_get_type ())
#define GTK_ICON_VIEW_ITEM_ACCESSIBLE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_ICON_VIEW_ITEM_ACCESSIBLE, GtkIconViewItemAccessible))
#define GTK_IS_ICON_VIEW_ITEM_ACCESSIBLE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_ICON_VIEW_ITEM_ACCESSIBLE))
typedef struct
{
GList *items;
GtkTreeModel *model;
} GtkIconViewAccessiblePrivate;
typedef struct
{
AtkObject parent;
GtkIconViewItem *item;
GtkWidget *widget;
AtkStateSet *state_set;
gchar *text;
gchar *action_description;
gchar *image_description;
guint action_idle_handler;
} GtkIconViewItemAccessible;
typedef struct
{
AtkObjectClass parent_class;
} GtkIconViewItemAccessibleClass;
GType _gtk_icon_view_item_accessible_get_type (void);
static gboolean gtk_icon_view_item_accessible_is_showing (GtkIconViewItemAccessible *item);
static void atk_component_item_interface_init (AtkComponentIface *iface);
static void atk_action_item_interface_init (AtkActionIface *iface);
static void atk_text_item_interface_init (AtkTextIface *iface);
static void atk_image_item_interface_init (AtkImageIface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkIconViewItemAccessible, _gtk_icon_view_item_accessible, ATK_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (ATK_TYPE_COMPONENT, atk_component_item_interface_init)
G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, atk_action_item_interface_init)
G_IMPLEMENT_INTERFACE (ATK_TYPE_TEXT, atk_text_item_interface_init)
G_IMPLEMENT_INTERFACE (ATK_TYPE_IMAGE, atk_image_item_interface_init))
static gboolean
idle_do_action (gpointer data)
{
GtkIconViewItemAccessible *item;
GtkIconView *icon_view;
GtkTreePath *path;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (data);
item->action_idle_handler = 0;
if (item->widget != NULL)
{
icon_view = GTK_ICON_VIEW (item->widget);
path = gtk_tree_path_new_from_indices (item->item->index, -1);
gtk_icon_view_item_activated (icon_view, path);
gtk_tree_path_free (path);
}
return FALSE;
}
static gboolean
gtk_icon_view_item_accessible_do_action (AtkAction *action,
gint i)
{
GtkIconViewItemAccessible *item;
if (i != 0)
return FALSE;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (action);
if (!GTK_IS_ICON_VIEW (item->widget))
return FALSE;
if (atk_state_set_contains_state (item->state_set, ATK_STATE_DEFUNCT))
return FALSE;
if (!item->action_idle_handler)
{
item->action_idle_handler = g_idle_add (idle_do_action, item);
g_source_set_name_by_id (item->action_idle_handler, "[gtk] idle_do_action");
}
return TRUE;
}
static gint
gtk_icon_view_item_accessible_get_n_actions (AtkAction *action)
{
return 1;
}
static const gchar *
gtk_icon_view_item_accessible_get_description (AtkAction *action,
gint i)
{
GtkIconViewItemAccessible *item;
if (i != 0)
return NULL;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (action);
if (item->action_description)
return item->action_description;
else
return "Activate item";
}
static const gchar *
gtk_icon_view_item_accessible_get_name (AtkAction *action,
gint i)
{
if (i != 0)
return NULL;
return "activate";
}
static gboolean
gtk_icon_view_item_accessible_set_description (AtkAction *action,
gint i,
const gchar *description)
{
GtkIconViewItemAccessible *item;
if (i != 0)
return FALSE;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (action);
g_free (item->action_description);
item->action_description = g_strdup (description);
return TRUE;
}
static void
atk_action_item_interface_init (AtkActionIface *iface)
{
iface->do_action = gtk_icon_view_item_accessible_do_action;
iface->set_description = gtk_icon_view_item_accessible_set_description;
iface->get_name = gtk_icon_view_item_accessible_get_name;
iface->get_n_actions = gtk_icon_view_item_accessible_get_n_actions;
iface->get_description = gtk_icon_view_item_accessible_get_description;
}
static const gchar *
gtk_icon_view_item_accessible_get_image_description (AtkImage *image)
{
GtkIconViewItemAccessible *item;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (image);
return item->image_description;
}
static gboolean
gtk_icon_view_item_accessible_set_image_description (AtkImage *image,
const gchar *description)
{
GtkIconViewItemAccessible *item;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (image);
g_free (item->image_description);
item->image_description = g_strdup (description);
return TRUE;
}
typedef struct {
GdkRectangle box;
gboolean pixbuf_found;
} GetPixbufBoxData;
static gboolean
get_pixbuf_foreach (GtkCellRenderer *renderer,
const GdkRectangle *cell_area,
const GdkRectangle *cell_background,
GetPixbufBoxData *data)
{
if (GTK_IS_CELL_RENDERER_PIXBUF (renderer))
{
data->box = *cell_area;
data->pixbuf_found = TRUE;
}
return (data->pixbuf_found != FALSE);
}
static gboolean
get_pixbuf_box (GtkIconView *icon_view,
GtkIconViewItem *item,
GdkRectangle *box)
{
GetPixbufBoxData data = { { 0, }, FALSE };
GtkCellAreaContext *context;
context = g_ptr_array_index (icon_view->priv->row_contexts, item->row);
_gtk_icon_view_set_cell_data (icon_view, item);
gtk_cell_area_foreach_alloc (icon_view->priv->cell_area, context,
GTK_WIDGET (icon_view),
&item->cell_area, &item->cell_area,
(GtkCellAllocCallback)get_pixbuf_foreach, &data);
*box = data.box;
return data.pixbuf_found;
}
static gboolean
get_text_foreach (GtkCellRenderer *renderer,
gchar **text)
{
if (GTK_IS_CELL_RENDERER_TEXT (renderer))
{
g_object_get (renderer, "text", text, NULL);
return TRUE;
}
return FALSE;
}
static gchar *
get_text (GtkIconView *icon_view,
GtkIconViewItem *item)
{
gchar *text = NULL;
_gtk_icon_view_set_cell_data (icon_view, item);
gtk_cell_area_foreach (icon_view->priv->cell_area,
(GtkCellCallback) get_text_foreach,
&text);
return text;
}
static void
gtk_icon_view_item_accessible_get_image_size (AtkImage *image,
gint *width,
gint *height)
{
GtkIconViewItemAccessible *item;
GdkRectangle box;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (image);
if (!GTK_IS_ICON_VIEW (item->widget))
return;
if (atk_state_set_contains_state (item->state_set, ATK_STATE_DEFUNCT))
return;
*width = 0;
*height = 0;
if (get_pixbuf_box (GTK_ICON_VIEW (item->widget), item->item, &box))
{
*width = box.width;
*height = box.height;
}
}
static void
gtk_icon_view_item_accessible_get_image_position (AtkImage *image,
gint *x,
gint *y,
AtkCoordType coord_type)
{
GtkIconViewItemAccessible *item;
GdkRectangle box;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (image);
if (!GTK_IS_ICON_VIEW (item->widget))
return;
if (atk_state_set_contains_state (item->state_set, ATK_STATE_DEFUNCT))
return;
atk_component_get_extents (ATK_COMPONENT (image), x, y, NULL, NULL,
coord_type);
if (get_pixbuf_box (GTK_ICON_VIEW (item->widget), item->item, &box))
{
*x+= box.x - item->item->cell_area.x;
*y+= box.y - item->item->cell_area.y;
}
}
static void
atk_image_item_interface_init (AtkImageIface *iface)
{
iface->get_image_description = gtk_icon_view_item_accessible_get_image_description;
iface->set_image_description = gtk_icon_view_item_accessible_set_image_description;
iface->get_image_size = gtk_icon_view_item_accessible_get_image_size;
iface->get_image_position = gtk_icon_view_item_accessible_get_image_position;
}
static gchar *
gtk_icon_view_item_accessible_get_text (AtkText *text,
gint start_pos,
gint end_pos)
{
GtkIconViewItemAccessible *item;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (text);
if (atk_state_set_contains_state (item->state_set, ATK_STATE_DEFUNCT))
return NULL;
if (item->text)
return g_utf8_substring (item->text, start_pos, end_pos > -1 ? end_pos : g_utf8_strlen (item->text, -1));
else
return g_strdup ("");
}
static gunichar
gtk_icon_view_item_accessible_get_character_at_offset (AtkText *text,
gint offset)
{
GtkIconViewItemAccessible *item;
gchar *string;
gchar *index;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (text);
if (atk_state_set_contains_state (item->state_set, ATK_STATE_DEFUNCT))
return '\0';
string = item->text;
if (!string)
return '\0';
if (offset >= g_utf8_strlen (string, -1))
return '\0';
index = g_utf8_offset_to_pointer (string, offset);
return g_utf8_get_char (index);
}
static PangoLayout *
create_pango_layout (GtkIconViewItemAccessible *item)
{
PangoLayout *layout;
layout = gtk_widget_create_pango_layout (item->widget, item->text);
return layout;
}
static gchar *
gtk_icon_view_item_accessible_get_text_before_offset (AtkText *atk_text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
GtkIconViewItemAccessible *item;
PangoLayout *layout;
gchar *text;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (atk_text);
if (atk_state_set_contains_state (item->state_set, ATK_STATE_DEFUNCT))
return NULL;
layout = create_pango_layout (item);
text = _gtk_pango_get_text_before (layout, boundary_type, offset, start_offset, end_offset);
g_object_unref (layout);
return text;
}
static gchar *
gtk_icon_view_item_accessible_get_text_at_offset (AtkText *atk_text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
GtkIconViewItemAccessible *item;
PangoLayout *layout;
gchar *text;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (atk_text);
if (atk_state_set_contains_state (item->state_set, ATK_STATE_DEFUNCT))
return NULL;
layout = create_pango_layout (item);
text = _gtk_pango_get_text_at (layout, boundary_type, offset, start_offset, end_offset);
g_object_unref (layout);
return text;
}
static gchar *
gtk_icon_view_item_accessible_get_text_after_offset (AtkText *atk_text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
GtkIconViewItemAccessible *item;
PangoLayout *layout;
gchar *text;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (atk_text);
if (atk_state_set_contains_state (item->state_set, ATK_STATE_DEFUNCT))
return NULL;
layout = create_pango_layout (item);
text = _gtk_pango_get_text_after (layout, boundary_type, offset, start_offset, end_offset);
g_object_unref (layout);
return text;
}
static gint
gtk_icon_view_item_accessible_get_character_count (AtkText *text)
{
GtkIconViewItemAccessible *item;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (text);
if (atk_state_set_contains_state (item->state_set, ATK_STATE_DEFUNCT))
return 0;
if (item->text)
return g_utf8_strlen (item->text, -1);
else
return 0;
}
static void
gtk_icon_view_item_accessible_get_character_extents (AtkText *text,
gint offset,
gint *x,
gint *y,
gint *width,
gint *height,
AtkCoordType coord_type)
{
GtkIconViewItemAccessible *item;
#if 0
GtkIconView *icon_view;
PangoRectangle char_rect;
const gchar *item_text;
gint index;
#endif
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (text);
if (!GTK_IS_ICON_VIEW (item->widget))
return;
if (atk_state_set_contains_state (item->state_set, ATK_STATE_DEFUNCT))
return;
#if 0
icon_view = GTK_ICON_VIEW (item->widget);
/* FIXME we probably have to use GailTextCell to salvage this */
gtk_icon_view_update_item_text (icon_view, item->item);
item_text = pango_layout_get_text (icon_view->priv->layout);
index = g_utf8_offset_to_pointer (item_text, offset) - item_text;
pango_layout_index_to_pos (icon_view->priv->layout, index, &char_rect);
atk_component_get_position (ATK_COMPONENT (text), x, y, coord_type);
*x += item->item->layout_x - item->item->x + char_rect.x / PANGO_SCALE;
/* Look at gtk_icon_view_paint_item() to see where the text is. */
*x -= ((item->item->width - item->item->layout_width) / 2) + (MAX (item->item->pixbuf_width, icon_view->priv->item_width) - item->item->width) / 2,
*y += item->item->layout_y - item->item->y + char_rect.y / PANGO_SCALE;
*width = char_rect.width / PANGO_SCALE;
*height = char_rect.height / PANGO_SCALE;
#endif
}
static gint
gtk_icon_view_item_accessible_get_offset_at_point (AtkText *text,
gint x,
gint y,
AtkCoordType coord_type)
{
GtkIconViewItemAccessible *item;
gint offset = 0;
#if 0
GtkIconView *icon_view;
const gchar *item_text;
gint index;
gint l_x, l_y;
#endif
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (text);
if (!GTK_IS_ICON_VIEW (item->widget))
return -1;
if (atk_state_set_contains_state (item->state_set, ATK_STATE_DEFUNCT))
return -1;
#if 0
icon_view = GTK_ICON_VIEW (item->widget);
/* FIXME we probably have to use GailTextCell to salvage this */
gtk_icon_view_update_item_text (icon_view, item->item);
atk_component_get_position (ATK_COMPONENT (text), &l_x, &l_y, coord_type);
x -= l_x + item->item->layout_x - item->item->x;
x += ((item->item->width - item->item->layout_width) / 2) + (MAX (item->item->pixbuf_width, icon_view->priv->item_width) - item->item->width) / 2,
y -= l_y + item->item->layout_y - item->item->y;
item_text = pango_layout_get_text (icon_view->priv->layout);
if (!pango_layout_xy_to_index (icon_view->priv->layout,
x * PANGO_SCALE,
y * PANGO_SCALE,
&index, NULL))
{
if (x < 0 || y < 0)
index = 0;
else
index = -1;
}
if (index == -1)
offset = g_utf8_strlen (item_text, -1);
else
offset = g_utf8_pointer_to_offset (item_text, item_text + index);
#endif
return offset;
}
static void
atk_text_item_interface_init (AtkTextIface *iface)
{
iface->get_text = gtk_icon_view_item_accessible_get_text;
iface->get_character_at_offset = gtk_icon_view_item_accessible_get_character_at_offset;
iface->get_text_before_offset = gtk_icon_view_item_accessible_get_text_before_offset;
iface->get_text_at_offset = gtk_icon_view_item_accessible_get_text_at_offset;
iface->get_text_after_offset = gtk_icon_view_item_accessible_get_text_after_offset;
iface->get_character_count = gtk_icon_view_item_accessible_get_character_count;
iface->get_character_extents = gtk_icon_view_item_accessible_get_character_extents;
iface->get_offset_at_point = gtk_icon_view_item_accessible_get_offset_at_point;
}
static void
gtk_icon_view_item_accessible_get_extents (AtkComponent *component,
gint *x,
gint *y,
gint *width,
gint *height,
AtkCoordType coord_type)
{
GtkIconViewItemAccessible *item;
AtkObject *parent_obj;
gint l_x, l_y;
g_return_if_fail (GTK_IS_ICON_VIEW_ITEM_ACCESSIBLE (component));
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (component);
if (!GTK_IS_WIDGET (item->widget))
return;
if (atk_state_set_contains_state (item->state_set, ATK_STATE_DEFUNCT))
return;
*width = item->item->cell_area.width;
*height = item->item->cell_area.height;
if (gtk_icon_view_item_accessible_is_showing (item))
{
parent_obj = gtk_widget_get_accessible (item->widget);
atk_component_get_extents (ATK_COMPONENT (parent_obj), &l_x, &l_y,
NULL, NULL, coord_type);
*x = l_x + item->item->cell_area.x;
*y = l_y + item->item->cell_area.y;
}
else
{
*x = G_MININT;
*y = G_MININT;
}
}
static gboolean
gtk_icon_view_item_accessible_grab_focus (AtkComponent *component)
{
GtkIconViewItemAccessible *item;
g_return_val_if_fail (GTK_IS_ICON_VIEW_ITEM_ACCESSIBLE (component), FALSE);
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (component);
if (!GTK_IS_WIDGET (item->widget))
return FALSE;
gtk_widget_grab_focus (item->widget);
_gtk_icon_view_set_cursor_item (GTK_ICON_VIEW (item->widget), item->item, NULL);
return TRUE;
}
static void
atk_component_item_interface_init (AtkComponentIface *iface)
{
iface->get_extents = gtk_icon_view_item_accessible_get_extents;
iface->grab_focus = gtk_icon_view_item_accessible_grab_focus;
}
static gboolean
gtk_icon_view_item_accessible_add_state (GtkIconViewItemAccessible *item,
AtkStateType state_type,
gboolean emit_signal)
{
gboolean rc;
rc = atk_state_set_add_state (item->state_set, state_type);
/* The signal should only be generated if the value changed,
* not when the item is set up. So states that are set
* initially should pass FALSE as the emit_signal argument.
*/
if (emit_signal)
{
atk_object_notify_state_change (ATK_OBJECT (item), state_type, TRUE);
/* If state_type is ATK_STATE_VISIBLE, additional notification */
if (state_type == ATK_STATE_VISIBLE)
g_signal_emit_by_name (item, "visible-data-changed");
}
return rc;
}
static gboolean
gtk_icon_view_item_accessible_remove_state (GtkIconViewItemAccessible *item,
AtkStateType state_type,
gboolean emit_signal)
{
if (atk_state_set_contains_state (item->state_set, state_type))
{
gboolean rc;
rc = atk_state_set_remove_state (item->state_set, state_type);
/* The signal should only be generated if the value changed,
* not when the item is set up. So states that are set
* initially should pass FALSE as the emit_signal argument.
*/
if (emit_signal)
{
atk_object_notify_state_change (ATK_OBJECT (item), state_type, FALSE);
/* If state_type is ATK_STATE_VISIBLE, additional notification */
if (state_type == ATK_STATE_VISIBLE)
g_signal_emit_by_name (item, "visible-data-changed");
}
return rc;
}
else
return FALSE;
}
static gboolean
gtk_icon_view_item_accessible_is_showing (GtkIconViewItemAccessible *item)
{
GtkAllocation allocation;
GtkIconView *icon_view;
GdkRectangle visible_rect;
gboolean is_showing;
/* An item is considered "SHOWING" if any part of the item
* is in the visible rectangle.
*/
if (!GTK_IS_ICON_VIEW (item->widget))
return FALSE;
if (item->item == NULL)
return FALSE;
gtk_widget_get_allocation (item->widget, &allocation);
icon_view = GTK_ICON_VIEW (item->widget);
visible_rect.x = 0;
if (icon_view->priv->hadjustment)
visible_rect.x += gtk_adjustment_get_value (icon_view->priv->hadjustment);
visible_rect.y = 0;
if (icon_view->priv->vadjustment)
visible_rect.y += gtk_adjustment_get_value (icon_view->priv->vadjustment);
visible_rect.width = allocation.width;
visible_rect.height = allocation.height;
if (((item->item->cell_area.x + item->item->cell_area.width) < visible_rect.x) ||
((item->item->cell_area.y + item->item->cell_area.height) < (visible_rect.y)) ||
(item->item->cell_area.x > (visible_rect.x + visible_rect.width)) ||
(item->item->cell_area.y > (visible_rect.y + visible_rect.height)))
is_showing = FALSE;
else
is_showing = TRUE;
return is_showing;
}
static gboolean
gtk_icon_view_item_accessible_set_visibility (GtkIconViewItemAccessible *item,
gboolean emit_signal)
{
if (gtk_icon_view_item_accessible_is_showing (item))
return gtk_icon_view_item_accessible_add_state (item, ATK_STATE_SHOWING,
emit_signal);
else
return gtk_icon_view_item_accessible_remove_state (item, ATK_STATE_SHOWING,
emit_signal);
}
static void
_gtk_icon_view_item_accessible_init (GtkIconViewItemAccessible *item)
{
atk_object_set_role (ATK_OBJECT (item), ATK_ROLE_ICON);
item->state_set = atk_state_set_new ();
atk_state_set_add_state (item->state_set, ATK_STATE_ENABLED);
atk_state_set_add_state (item->state_set, ATK_STATE_FOCUSABLE);
atk_state_set_add_state (item->state_set, ATK_STATE_SENSITIVE);
atk_state_set_add_state (item->state_set, ATK_STATE_SELECTABLE);
atk_state_set_add_state (item->state_set, ATK_STATE_VISIBLE);
item->action_description = NULL;
item->image_description = NULL;
item->action_idle_handler = 0;
}
static void
_gtk_icon_view_item_accessible_finalize (GObject *object)
{
GtkIconViewItemAccessible *item;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (object);
if (item->widget)
g_object_remove_weak_pointer (G_OBJECT (item->widget), (gpointer) &item->widget);
if (item->state_set)
g_object_unref (item->state_set);
g_free (item->text);
g_free (item->action_description);
g_free (item->image_description);
if (item->action_idle_handler)
{
g_source_remove (item->action_idle_handler);
item->action_idle_handler = 0;
}
G_OBJECT_CLASS (_gtk_icon_view_item_accessible_parent_class)->finalize (object);
}
static AtkObject*
_gtk_icon_view_item_accessible_get_parent (AtkObject *obj)
{
GtkIconViewItemAccessible *item;
g_return_val_if_fail (GTK_IS_ICON_VIEW_ITEM_ACCESSIBLE (obj), NULL);
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (obj);
if (item->widget)
return gtk_widget_get_accessible (item->widget);
else
return NULL;
}
static gint
_gtk_icon_view_item_accessible_get_index_in_parent (AtkObject *obj)
{
GtkIconViewItemAccessible *item;
g_return_val_if_fail (GTK_IS_ICON_VIEW_ITEM_ACCESSIBLE (obj), 0);
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (obj);
return item->item->index;
}
static AtkStateSet *
_gtk_icon_view_item_accessible_ref_state_set (AtkObject *obj)
{
GtkIconViewItemAccessible *item;
GtkIconView *icon_view;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (obj);
g_return_val_if_fail (item->state_set, NULL);
if (!item->widget)
return NULL;
icon_view = GTK_ICON_VIEW (item->widget);
if (icon_view->priv->cursor_item == item->item)
atk_state_set_add_state (item->state_set, ATK_STATE_FOCUSED);
else
atk_state_set_remove_state (item->state_set, ATK_STATE_FOCUSED);
if (item->item->selected)
atk_state_set_add_state (item->state_set, ATK_STATE_SELECTED);
else
atk_state_set_remove_state (item->state_set, ATK_STATE_SELECTED);
return g_object_ref (item->state_set);
}
static void
_gtk_icon_view_item_accessible_class_init (GtkIconViewItemAccessibleClass *klass)
{
GObjectClass *gobject_class;
AtkObjectClass *atk_class;
gobject_class = (GObjectClass *)klass;
atk_class = (AtkObjectClass *)klass;
gobject_class->finalize = _gtk_icon_view_item_accessible_finalize;
atk_class->get_index_in_parent = _gtk_icon_view_item_accessible_get_index_in_parent;
atk_class->get_parent = _gtk_icon_view_item_accessible_get_parent;
atk_class->ref_state_set = _gtk_icon_view_item_accessible_ref_state_set;
}
static void atk_component_interface_init (AtkComponentIface *iface);
static void atk_selection_interface_init (AtkSelectionIface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkIconViewAccessible, gtk_icon_view_accessible, GTK_TYPE_WIDGET_ACCESSIBLE,
G_ADD_PRIVATE (GtkIconViewAccessible)
G_IMPLEMENT_INTERFACE (ATK_TYPE_COMPONENT, atk_component_interface_init)
G_IMPLEMENT_INTERFACE (ATK_TYPE_SELECTION, atk_selection_interface_init))
typedef struct
{
AtkObject *item;
int index;
} ItemAccessibleInfo;
static void
gtk_icon_view_item_accessible_info_new (GtkIconViewAccessible *self,
GtkIconViewItemAccessible *item,
int index)
{
GtkIconViewAccessiblePrivate *priv = gtk_icon_view_accessible_get_instance_private (self);
ItemAccessibleInfo *info;
ItemAccessibleInfo *tmp_info;
GList *items;
info = g_new (ItemAccessibleInfo, 1);
info->item = ATK_OBJECT (item);
info->index = index;
items = priv->items;
while (items)
{
tmp_info = items->data;
if (tmp_info->index > index)
break;
items = items->next;
}
priv->items = g_list_insert_before (priv->items, items, info);
}
static gint
gtk_icon_view_accessible_get_n_children (AtkObject *accessible)
{
GtkIconView *icon_view;
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (accessible));
if (!widget)
return 0;
icon_view = GTK_ICON_VIEW (widget);
return g_list_length (icon_view->priv->items);
}
static GtkIconViewItemAccessible *
gtk_icon_view_accessible_find_child (GtkIconViewAccessible *self,
gint index)
{
GtkIconViewAccessiblePrivate *priv = gtk_icon_view_accessible_get_instance_private (self);
GList *items;
items = priv->items;
while (items)
{
ItemAccessibleInfo *info = items->data;
GList *next = items->next;
if (info->index == index)
return GTK_ICON_VIEW_ITEM_ACCESSIBLE (info->item);
items = next;
}
return NULL;
}
static AtkObject *
gtk_icon_view_accessible_ref_child (AtkObject *accessible,
gint index)
{
GtkIconViewAccessible *self = GTK_ICON_VIEW_ACCESSIBLE (accessible);
GtkIconViewItemAccessible *a11y_item;
GtkIconView *icon_view;
GtkWidget *widget;
GList *icons;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (accessible));
if (widget == NULL)
return NULL;
icon_view = GTK_ICON_VIEW (widget);
icons = g_list_nth (icon_view->priv->items, index);
if (icons)
{
GtkIconViewItem *item = icons->data;
g_return_val_if_fail (item->index == index, NULL);
a11y_item = gtk_icon_view_accessible_find_child (self, index);
if (a11y_item == NULL)
{
a11y_item = g_object_new (GTK_TYPE_ICON_VIEW_ITEM_ACCESSIBLE, NULL);
a11y_item->item = item;
a11y_item->widget = widget;
g_free (a11y_item->text);
a11y_item->text = get_text (icon_view, item);
gtk_icon_view_item_accessible_set_visibility (a11y_item, FALSE);
g_object_add_weak_pointer (G_OBJECT (widget), (gpointer) &(a11y_item->widget));
gtk_icon_view_item_accessible_info_new (self, a11y_item, index);
}
g_object_ref (a11y_item);
return ATK_OBJECT (a11y_item);
}
else
{
return NULL;
}
}
static void
gtk_icon_view_accessible_traverse_items (GtkIconViewAccessible *self,
GList *list)
{
GtkIconViewAccessiblePrivate *priv = gtk_icon_view_accessible_get_instance_private (self);
GtkWidget *widget;
gboolean act_on_item;
GList *items;
if (priv->items == NULL)
return;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (self));
if (widget == NULL)
return;
items = priv->items;
act_on_item = (list == NULL);
while (items)
{
ItemAccessibleInfo *info = items->data;
GtkIconViewItemAccessible *item;
GList *next = items->next;
item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (info->item);
if (act_on_item == FALSE && list == items)
act_on_item = TRUE;
if (act_on_item)
gtk_icon_view_item_accessible_set_visibility (item, TRUE);
items = next;
}
}
void
gtk_icon_view_accessible_adjustment_changed (GtkIconViewAccessible *self)
{
gtk_icon_view_accessible_traverse_items (self, NULL);
}
static void
gtk_icon_view_accessible_model_row_changed (GtkTreeModel *tree_model,
GtkTreePath *path,
GtkTreeIter *iter,
gpointer user_data)
{
GtkIconViewAccessible *self = user_data;
GtkIconViewItemAccessible *a11y_item;
int index;
index = gtk_tree_path_get_indices (path)[0];
a11y_item = gtk_icon_view_accessible_find_child (self, index);
if (a11y_item)
{
GtkIconViewItem *item = a11y_item->item;
GtkIconView *icon_view = GTK_ICON_VIEW (gtk_accessible_get_widget (GTK_ACCESSIBLE (self)));
const char *name = atk_object_get_name (ATK_OBJECT (a11y_item));
if (name == NULL || *name == '\0')
{
g_free (a11y_item->text);
a11y_item->text = get_text (icon_view, item);
}
}
g_signal_emit_by_name (self, "visible-data-changed");
}
static void
gtk_icon_view_accessible_model_row_inserted (GtkTreeModel *tree_model,
GtkTreePath *path,
GtkTreeIter *iter,
gpointer user_data)
{
GtkIconViewAccessible *self = user_data;
GtkIconViewAccessiblePrivate *priv = gtk_icon_view_accessible_get_instance_private (self);
GList *items;
GList *tmp_list;
int index;
index = gtk_tree_path_get_indices (path)[0];
items = priv->items;
tmp_list = NULL;
while (items)
{
ItemAccessibleInfo *info = items->data;
GtkIconViewItemAccessible *item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (info->item);
GList *next = items->next;
if (info->index != item->item->index)
{
if (info->index < index)
g_warning ("Unexpected index value on insertion %d %d", index, info->index);
if (tmp_list == NULL)
tmp_list = items;
info->index = item->item->index;
}
items = next;
}
gtk_icon_view_accessible_traverse_items (self, tmp_list);
g_signal_emit_by_name (self,
"children-changed::add",
index, NULL, NULL);
}
static void
gtk_icon_view_accessible_model_row_deleted (GtkTreeModel *tree_model,
GtkTreePath *path,
gpointer user_data)
{
GtkIconViewAccessible *self = user_data;
GtkIconViewAccessiblePrivate *priv = gtk_icon_view_accessible_get_instance_private (self);
GList *items;
GList *tmp_list = NULL;
GList *deleted_item = NULL;
int index;
index = gtk_tree_path_get_indices (path)[0];
items = priv->items;
while (items)
{
ItemAccessibleInfo *info = items->data;
GtkIconViewItemAccessible *item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (info->item);
GList *next = items->next;
if (info->index == index)
{
deleted_item = items;
}
else if (info->index != item->item->index)
{
if (tmp_list == NULL)
tmp_list = items;
info->index = item->item->index;
}
items = next;
}
if (deleted_item)
{
ItemAccessibleInfo *info = deleted_item->data;
gtk_icon_view_item_accessible_add_state (GTK_ICON_VIEW_ITEM_ACCESSIBLE (info->item),
ATK_STATE_DEFUNCT,
TRUE);
g_signal_emit_by_name (self,
"children-changed::remove",
index, NULL, NULL);
priv->items = g_list_delete_link (priv->items, deleted_item);
g_object_unref (info->item);
g_free (info);
}
gtk_icon_view_accessible_traverse_items (self, tmp_list);
}
static gint
gtk_icon_view_accessible_item_compare (ItemAccessibleInfo *i1,
ItemAccessibleInfo *i2)
{
return i1->index - i2->index;
}
static void
gtk_icon_view_accessible_model_rows_reordered (GtkTreeModel *tree_model,
GtkTreePath *path,
GtkTreeIter *iter,
gint *new_order,
gpointer user_data)
{
GtkIconViewAccessible *self = user_data;
GtkIconViewAccessiblePrivate *priv = gtk_icon_view_accessible_get_instance_private (self);
GtkIconView *icon_view;
GList *items;
int *order;
int length, i;
icon_view = GTK_ICON_VIEW (gtk_accessible_get_widget (GTK_ACCESSIBLE (self)));
length = gtk_tree_model_iter_n_children (tree_model, NULL);
order = g_new (int, length);
for (i = 0; i < length; i++)
order [new_order[i]] = i;
items = priv->items;
while (items)
{
ItemAccessibleInfo *info = items->data;
GtkIconViewItemAccessible *item = GTK_ICON_VIEW_ITEM_ACCESSIBLE (info->item);
GList *next = items->next;
info->index = order[info->index];
item->item = g_list_nth_data (icon_view->priv->items, info->index);
items = next;
}
g_free (order);
priv->items = g_list_sort (priv->items, (GCompareFunc) gtk_icon_view_accessible_item_compare);
}
static void
gtk_icon_view_accessible_disconnect_model_signals (GtkIconViewAccessible *self)
{
GtkIconViewAccessiblePrivate *priv = gtk_icon_view_accessible_get_instance_private (self);
g_signal_handlers_disconnect_by_func (priv->model, gtk_icon_view_accessible_model_row_changed, self);
g_signal_handlers_disconnect_by_func (priv->model, gtk_icon_view_accessible_model_row_inserted, self);
g_signal_handlers_disconnect_by_func (priv->model, gtk_icon_view_accessible_model_row_deleted, self);
g_signal_handlers_disconnect_by_func (priv->model, gtk_icon_view_accessible_model_rows_reordered, self);
}
static void
gtk_icon_view_accessible_connect_model_signals (GtkIconViewAccessible *self)
{
GtkIconViewAccessiblePrivate *priv = gtk_icon_view_accessible_get_instance_private (self);
g_signal_connect_object (priv->model, "row-changed",
G_CALLBACK (gtk_icon_view_accessible_model_row_changed),
self, 0);
g_signal_connect_object (priv->model, "row-inserted",
G_CALLBACK (gtk_icon_view_accessible_model_row_inserted),
self, G_CONNECT_AFTER);
g_signal_connect_object (priv->model, "row-deleted",
G_CALLBACK (gtk_icon_view_accessible_model_row_deleted),
self, G_CONNECT_AFTER);
g_signal_connect_object (priv->model, "rows-reordered",
G_CALLBACK (gtk_icon_view_accessible_model_rows_reordered),
self, G_CONNECT_AFTER);
}
static void
gtk_icon_view_accessible_clear_cache (GtkIconViewAccessible *self)
{
GtkIconViewAccessiblePrivate *priv = gtk_icon_view_accessible_get_instance_private (self);
GList *items;
if (priv->items == NULL)
return;
items = priv->items;
while (items != NULL)
{
ItemAccessibleInfo *info = items->data;
GList *next = items->next;
gtk_icon_view_item_accessible_add_state (GTK_ICON_VIEW_ITEM_ACCESSIBLE (info->item),
ATK_STATE_DEFUNCT,
TRUE);
g_object_unref (info->item);
g_free (info);
items = next;
}
g_clear_pointer (&priv->items, g_list_free);
}
void
gtk_icon_view_accessible_update_model (GtkIconViewAccessible *self,
GtkTreeModel *model)
{
GtkIconViewAccessiblePrivate *priv = gtk_icon_view_accessible_get_instance_private (self);
if (priv->model != NULL)
{
g_object_remove_weak_pointer (G_OBJECT (priv->model),
(gpointer *) &priv->model);
gtk_icon_view_accessible_disconnect_model_signals (self);
}
gtk_icon_view_accessible_clear_cache (self);
priv->model = model;
/* If there is no model the GtkIconView is probably being destroyed */
if (priv->model != NULL)
{
g_object_add_weak_pointer (G_OBJECT (priv->model), (gpointer *) &priv->model);
gtk_icon_view_accessible_connect_model_signals (self);
}
}
static void
gtk_icon_view_accessible_initialize (AtkObject *accessible,
gpointer data)
{
GtkIconViewAccessible *self = GTK_ICON_VIEW_ACCESSIBLE (accessible);
GtkIconViewAccessiblePrivate *priv = gtk_icon_view_accessible_get_instance_private (self);
GtkIconView *icon_view = data;
if (ATK_OBJECT_CLASS (gtk_icon_view_accessible_parent_class)->initialize)
ATK_OBJECT_CLASS (gtk_icon_view_accessible_parent_class)->initialize (accessible, data);
priv->model = icon_view->priv->model;
if (priv->model)
{
g_object_add_weak_pointer (G_OBJECT (priv->model), (gpointer *) &priv->model);
gtk_icon_view_accessible_connect_model_signals (self);
}
accessible->role = ATK_ROLE_LAYERED_PANE;
}
static void
gtk_icon_view_accessible_finalize (GObject *object)
{
GtkIconViewAccessible *view = GTK_ICON_VIEW_ACCESSIBLE (object);
gtk_icon_view_accessible_clear_cache (view);
G_OBJECT_CLASS (gtk_icon_view_accessible_parent_class)->finalize (object);
}
static void
gtk_icon_view_accessible_class_init (GtkIconViewAccessibleClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
AtkObjectClass *atk_class = ATK_OBJECT_CLASS (klass);
gobject_class->finalize = gtk_icon_view_accessible_finalize;
atk_class->get_n_children = gtk_icon_view_accessible_get_n_children;
atk_class->ref_child = gtk_icon_view_accessible_ref_child;
atk_class->initialize = gtk_icon_view_accessible_initialize;
}
static void
gtk_icon_view_accessible_init (GtkIconViewAccessible *accessible)
{
}
static AtkObject*
gtk_icon_view_accessible_ref_accessible_at_point (AtkComponent *component,
gint x,
gint y,
AtkCoordType coord_type)
{
GtkWidget *widget;
GtkIconView *icon_view;
GtkIconViewItem *item;
gint x_pos, y_pos;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (component));
if (widget == NULL)
return NULL;
icon_view = GTK_ICON_VIEW (widget);
atk_component_get_extents (component, &x_pos, &y_pos, NULL, NULL, coord_type);
item = _gtk_icon_view_get_item_at_coords (icon_view, x - x_pos, y - y_pos, TRUE, NULL);
if (item)
return gtk_icon_view_accessible_ref_child (ATK_OBJECT (component), item->index);
return NULL;
}
static void
atk_component_interface_init (AtkComponentIface *iface)
{
iface->ref_accessible_at_point = gtk_icon_view_accessible_ref_accessible_at_point;
}
static gboolean
gtk_icon_view_accessible_add_selection (AtkSelection *selection,
gint i)
{
GtkWidget *widget;
GtkIconView *icon_view;
GtkIconViewItem *item;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (selection));
if (widget == NULL)
return FALSE;
icon_view = GTK_ICON_VIEW (widget);
item = g_list_nth_data (icon_view->priv->items, i);
if (!item)
return FALSE;
_gtk_icon_view_select_item (icon_view, item);
return TRUE;
}
static gboolean
gtk_icon_view_accessible_clear_selection (AtkSelection *selection)
{
GtkWidget *widget;
GtkIconView *icon_view;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (selection));
if (widget == NULL)
return FALSE;
icon_view = GTK_ICON_VIEW (widget);
gtk_icon_view_unselect_all (icon_view);
return TRUE;
}
static AtkObject*
gtk_icon_view_accessible_ref_selection (AtkSelection *selection,
gint i)
{
GList *l;
GtkWidget *widget;
GtkIconView *icon_view;
GtkIconViewItem *item;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (selection));
if (widget == NULL)
return NULL;
icon_view = GTK_ICON_VIEW (widget);
l = icon_view->priv->items;
while (l)
{
item = l->data;
if (item->selected)
{
if (i == 0)
return atk_object_ref_accessible_child (gtk_widget_get_accessible (widget), item->index);
else
i--;
}
l = l->next;
}
return NULL;
}
static gint
gtk_icon_view_accessible_get_selection_count (AtkSelection *selection)
{
GtkWidget *widget;
GtkIconView *icon_view;
GtkIconViewItem *item;
GList *l;
gint count;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (selection));
if (widget == NULL)
return 0;
icon_view = GTK_ICON_VIEW (widget);
l = icon_view->priv->items;
count = 0;
while (l)
{
item = l->data;
if (item->selected)
count++;
l = l->next;
}
return count;
}
static gboolean
gtk_icon_view_accessible_is_child_selected (AtkSelection *selection,
gint i)
{
GtkWidget *widget;
GtkIconView *icon_view;
GtkIconViewItem *item;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (selection));
if (widget == NULL)
return FALSE;
icon_view = GTK_ICON_VIEW (widget);
item = g_list_nth_data (icon_view->priv->items, i);
if (!item)
return FALSE;
return item->selected;
}
static gboolean
gtk_icon_view_accessible_remove_selection (AtkSelection *selection,
gint i)
{
GtkWidget *widget;
GtkIconView *icon_view;
GtkIconViewItem *item;
GList *l;
gint count;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (selection));
if (widget == NULL)
return FALSE;
icon_view = GTK_ICON_VIEW (widget);
l = icon_view->priv->items;
count = 0;
while (l)
{
item = l->data;
if (item->selected)
{
if (count == i)
{
_gtk_icon_view_unselect_item (icon_view, item);
return TRUE;
}
count++;
}
l = l->next;
}
return FALSE;
}
static gboolean
gtk_icon_view_accessible_select_all_selection (AtkSelection *selection)
{
GtkWidget *widget;
GtkIconView *icon_view;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (selection));
if (widget == NULL)
return FALSE;
icon_view = GTK_ICON_VIEW (widget);
gtk_icon_view_select_all (icon_view);
return TRUE;
}
static void
atk_selection_interface_init (AtkSelectionIface *iface)
{
iface->add_selection = gtk_icon_view_accessible_add_selection;
iface->clear_selection = gtk_icon_view_accessible_clear_selection;
iface->ref_selection = gtk_icon_view_accessible_ref_selection;
iface->get_selection_count = gtk_icon_view_accessible_get_selection_count;
iface->is_child_selected = gtk_icon_view_accessible_is_child_selected;
iface->remove_selection = gtk_icon_view_accessible_remove_selection;
iface->select_all_selection = gtk_icon_view_accessible_select_all_selection;
}
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