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gtk/gtk/gtkbbox.c
Matthias Clasen f53ad33994 Remove GtkObject completely
2010-09-26 22:18:19 -04:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
/**
* SECTION:gtkbbox
* @Short_description: Base class for GtkHButtonBox and GtkVButtonBox
* @Title: GtkButtonBox
* @See_also: #GtkVButtonBox, #GtkHButtonBox
*
* The primary purpose of this class is to keep track of the various
* properties of #GtkHButtonBox and #GtkVButtonBox widgets.
*
* gtk_button_box_get_layout() and gtk_button_box_set_layout() retrieve and
* alter the method used to spread the buttons in a button box across the
* container, respectively.
*
* The main purpose of GtkButtonBox is to make sure the children have all the
* same size. GtkButtonBox gives all children the same size, but it does allow
* 'outliers' to keep their own larger size. To force all children to be
* strictly the same size without exceptions, you can set the
* #GtkButtonBox::homogeneous property to %TRUE.
*/
#include "config.h"
#include "gtkbbox.h"
#include "gtkorientable.h"
#include "gtkprivate.h"
#include "gtksizerequest.h"
#include "gtktypeutils.h"
#include "gtkintl.h"
struct _GtkButtonBoxPrivate
{
GtkButtonBoxStyle layout_style;
};
enum {
PROP_0,
PROP_LAYOUT_STYLE
};
enum {
CHILD_PROP_0,
CHILD_PROP_SECONDARY
};
#define GTK_BOX_SECONDARY_CHILD "gtk-box-secondary-child"
static void gtk_button_box_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_button_box_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_button_box_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_button_box_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_button_box_remove (GtkContainer *container,
GtkWidget *widget);
static void gtk_button_box_set_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_button_box_get_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
GValue *value,
GParamSpec *pspec);
#define DEFAULT_CHILD_MIN_WIDTH 85
#define DEFAULT_CHILD_MIN_HEIGHT 27
#define DEFAULT_CHILD_IPAD_X 4
#define DEFAULT_CHILD_IPAD_Y 0
#define DEFAULT_LAYOUT_STYLE GTK_BUTTONBOX_EDGE
G_DEFINE_TYPE (GtkButtonBox, gtk_button_box, GTK_TYPE_BOX)
static void
gtk_button_box_class_init (GtkButtonBoxClass *class)
{
GtkWidgetClass *widget_class;
GObjectClass *gobject_class;
GtkContainerClass *container_class;
gobject_class = G_OBJECT_CLASS (class);
widget_class = (GtkWidgetClass*) class;
container_class = (GtkContainerClass*) class;
gobject_class->set_property = gtk_button_box_set_property;
gobject_class->get_property = gtk_button_box_get_property;
widget_class->size_request = gtk_button_box_size_request;
widget_class->size_allocate = gtk_button_box_size_allocate;
container_class->remove = gtk_button_box_remove;
container_class->set_child_property = gtk_button_box_set_child_property;
container_class->get_child_property = gtk_button_box_get_child_property;
/* FIXME we need to override the "spacing" property on GtkBox once
* libgobject allows that.
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("child-min-width",
P_("Minimum child width"),
P_("Minimum width of buttons inside the box"),
0,
G_MAXINT,
DEFAULT_CHILD_MIN_WIDTH,
GTK_PARAM_READABLE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("child-min-height",
P_("Minimum child height"),
P_("Minimum height of buttons inside the box"),
0,
G_MAXINT,
DEFAULT_CHILD_MIN_HEIGHT,
GTK_PARAM_READABLE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("child-internal-pad-x",
P_("Child internal width padding"),
P_("Amount to increase child's size on either side"),
0,
G_MAXINT,
DEFAULT_CHILD_IPAD_X,
GTK_PARAM_READABLE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("child-internal-pad-y",
P_("Child internal height padding"),
P_("Amount to increase child's size on the top and bottom"),
0,
G_MAXINT,
DEFAULT_CHILD_IPAD_Y,
GTK_PARAM_READABLE));
g_object_class_install_property (gobject_class,
PROP_LAYOUT_STYLE,
g_param_spec_enum ("layout-style",
P_("Layout style"),
P_("How to lay out the buttons in the box. Possible values are: spread, edge, start and end"),
GTK_TYPE_BUTTON_BOX_STYLE,
DEFAULT_LAYOUT_STYLE,
GTK_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_SECONDARY,
g_param_spec_boolean ("secondary",
P_("Secondary"),
P_("If TRUE, the child appears in a secondary group of children, suitable for, e.g., help buttons"),
FALSE,
GTK_PARAM_READWRITE));
g_type_class_add_private (class, sizeof (GtkButtonBoxPrivate));
}
static void
gtk_button_box_init (GtkButtonBox *button_box)
{
GtkButtonBoxPrivate *priv;
button_box->priv = G_TYPE_INSTANCE_GET_PRIVATE (button_box,
GTK_TYPE_BUTTON_BOX,
GtkButtonBoxPrivate);
priv = button_box->priv;
gtk_box_set_spacing (GTK_BOX (button_box), 0);
priv->layout_style = DEFAULT_LAYOUT_STYLE;
}
static void
gtk_button_box_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
switch (prop_id)
{
case PROP_LAYOUT_STYLE:
gtk_button_box_set_layout (GTK_BUTTON_BOX (object),
g_value_get_enum (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_button_box_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkButtonBoxPrivate *priv = GTK_BUTTON_BOX (object)->priv;
switch (prop_id)
{
case PROP_LAYOUT_STYLE:
g_value_set_enum (value, priv->layout_style);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_button_box_set_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
switch (property_id)
{
case CHILD_PROP_SECONDARY:
gtk_button_box_set_child_secondary (GTK_BUTTON_BOX (container), child,
g_value_get_boolean (value));
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
}
static void
gtk_button_box_get_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
switch (property_id)
{
case CHILD_PROP_SECONDARY:
g_value_set_boolean (value,
gtk_button_box_get_child_secondary (GTK_BUTTON_BOX (container),
child));
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
}
static void
gtk_button_box_remove (GtkContainer *container,
GtkWidget *widget)
{
/* clear is_secondary flag in case the widget
* is added to another container
*/
gtk_button_box_set_child_secondary (GTK_BUTTON_BOX (container),
widget,
FALSE);
GTK_CONTAINER_CLASS (gtk_button_box_parent_class)->remove (container, widget);
}
/**
* gtk_button_box_set_layout:
* @widget: a #GtkButtonBox
* @layout_style: the new layout style
*
* Changes the way buttons are arranged in their container.
*/
void
gtk_button_box_set_layout (GtkButtonBox *widget,
GtkButtonBoxStyle layout_style)
{
GtkButtonBoxPrivate *priv;
g_return_if_fail (GTK_IS_BUTTON_BOX (widget));
priv = widget->priv;
if (priv->layout_style != layout_style)
{
priv->layout_style = layout_style;
g_object_notify (G_OBJECT (widget), "layout-style");
gtk_widget_queue_resize (GTK_WIDGET (widget));
}
}
/**
* gtk_button_box_get_layout:
* @widget: a #GtkButtonBox
*
* Retrieves the method being used to arrange the buttons in a button box.
*
* Returns: the method used to lay out buttons in @widget.
*/
GtkButtonBoxStyle
gtk_button_box_get_layout (GtkButtonBox *widget)
{
g_return_val_if_fail (GTK_IS_BUTTON_BOX (widget), DEFAULT_LAYOUT_STYLE);
return widget->priv->layout_style;
}
/**
* gtk_button_box_get_child_secondary:
* @widget: a #GtkButtonBox
* @child: a child of @widget
*
* Returns whether @child should appear in a secondary group of children.
*
* Return value: whether @child should appear in a secondary group of children.
*
* Since: 2.4
**/
gboolean
gtk_button_box_get_child_secondary (GtkButtonBox *widget,
GtkWidget *child)
{
g_return_val_if_fail (GTK_IS_BUTTON_BOX (widget), FALSE);
g_return_val_if_fail (GTK_IS_WIDGET (child), FALSE);
return (g_object_get_data (G_OBJECT (child), GTK_BOX_SECONDARY_CHILD) != NULL);
}
/**
* gtk_button_box_set_child_secondary
* @widget: a #GtkButtonBox
* @child: a child of @widget
* @is_secondary: if %TRUE, the @child appears in a secondary group of the
* button box.
*
* Sets whether @child should appear in a secondary group of children.
* A typical use of a secondary child is the help button in a dialog.
*
* This group appears after the other children if the style
* is %GTK_BUTTONBOX_START, %GTK_BUTTONBOX_SPREAD or
* %GTK_BUTTONBOX_EDGE, and before the other children if the style
* is %GTK_BUTTONBOX_END. For horizontal button boxes, the definition
* of before/after depends on direction of the widget (see
* gtk_widget_set_direction()). If the style is %GTK_BUTTONBOX_START
* or %GTK_BUTTONBOX_END, then the secondary children are aligned at
* the other end of the button box from the main children. For the
* other styles, they appear immediately next to the main children.
**/
void
gtk_button_box_set_child_secondary (GtkButtonBox *widget,
GtkWidget *child,
gboolean is_secondary)
{
g_return_if_fail (GTK_IS_BUTTON_BOX (widget));
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (widget));
g_object_set_data (G_OBJECT (child),
GTK_BOX_SECONDARY_CHILD,
is_secondary ? GINT_TO_POINTER (1) : NULL);
gtk_widget_child_notify (child, "secondary");
if (gtk_widget_get_visible (GTK_WIDGET (widget)) &&
gtk_widget_get_visible (child))
gtk_widget_queue_resize (child);
}
/* Ask children how much space they require and round up
* to match minimum size and internal padding.
* Returns the size each single child should have.
*/
static void
gtk_button_box_child_requisition (GtkWidget *widget,
gint *nvis_children,
gint *nvis_secondaries,
gint **widths,
gint **heights)
{
GtkButtonBoxPrivate *priv;
GtkButtonBox *bbox;
GList *children, *list;
gint nchildren;
gint nsecondaries;
gint needed_width;
gint needed_height;
gint avg_w, avg_h;
GtkRequisition child_requisition;
gint ipad_w;
gint ipad_h;
gint child_min_width;
gint child_min_height;
gint ipad_x;
gint ipad_y;
gboolean homogeneous;
gint i;
g_return_if_fail (GTK_IS_BUTTON_BOX (widget));
bbox = GTK_BUTTON_BOX (widget);
priv = bbox->priv;
homogeneous = gtk_box_get_homogeneous (GTK_BOX (widget));
gtk_widget_style_get (widget,
"child-min-width", &child_min_width,
"child-min-height", &child_min_height,
"child-internal-pad-x", &ipad_x,
"child-internal-pad-y", &ipad_y,
NULL);
nchildren = 0;
nsecondaries = 0;
list = children = _gtk_box_get_children (GTK_BOX (bbox));
needed_width = child_min_width;
needed_height = child_min_height;
ipad_w = ipad_x * 2;
ipad_h = ipad_y * 2;
avg_w = avg_h = 0;
while (children)
{
GtkWidget *child;
child = children->data;
children = children->next;
if (gtk_widget_get_visible (child))
{
nchildren += 1;
gtk_widget_get_preferred_size (child,
&child_requisition, NULL);
avg_w += child_requisition.width + ipad_w;
avg_h += child_requisition.height + ipad_h;
}
}
avg_w /= MAX (nchildren, 1);
avg_h /= MAX (nchildren, 1);
*widths = g_new (gint, nchildren);
*heights = g_new (gint, nchildren);
i = 0;
children = list;
while (children)
{
GtkWidget *child;
gboolean is_secondary;
child = children->data;
children = children->next;
if (gtk_widget_get_visible (child))
{
is_secondary = gtk_button_box_get_child_secondary (bbox, child);
if (is_secondary)
nsecondaries++;
gtk_widget_get_preferred_size (child, &child_requisition, NULL);
if (homogeneous || (child_requisition.width + ipad_w < avg_w * 1.5))
{
(*widths)[i] = -1;
if (child_requisition.width + ipad_w > needed_width)
needed_width = child_requisition.width + ipad_w;
}
else
{
(*widths)[i] = child_requisition.width + ipad_w;
}
if (homogeneous || (child_requisition.height + ipad_h < avg_h * 1.5))
{
(*heights)[i] = -1;
if (child_requisition.height + ipad_h > needed_height)
needed_height = child_requisition.height + ipad_h;
}
else
{
(*heights)[i] = child_requisition.height + ipad_h;
}
i++;
}
}
g_list_free (list);
for (i = 0; i < nchildren; i++)
{
if ((*widths)[i] == -1)
(*widths)[i] = needed_width;
if ((*heights)[i] == -1)
(*heights)[i] = needed_height;
}
if (nvis_children)
*nvis_children = nchildren;
if (nvis_secondaries)
*nvis_secondaries = nsecondaries;
}
static void
gtk_button_box_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkButtonBoxPrivate *priv;
GtkButtonBox *bbox;
gint nvis_children;
gint max_size;
gint total_size;
gint spacing;
guint border_width;
GtkOrientation orientation;
gint *widths;
gint *heights;
gint i;
bbox = GTK_BUTTON_BOX (widget);
priv = bbox->priv;
orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (widget));
spacing = gtk_box_get_spacing (GTK_BOX (widget));
gtk_button_box_child_requisition (widget,
&nvis_children,
NULL,
&widths, &heights);
max_size = 0;
total_size = 0;
for (i = 0; i < nvis_children; i++)
{
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
total_size += widths[i];
max_size = MAX (max_size, heights[i]);
}
else
{
total_size += heights[i];
max_size = MAX (max_size, widths[i]);
}
}
g_free (widths);
g_free (heights);
if (nvis_children == 0)
{
requisition->width = 0;
requisition->height = 0;
}
else
{
switch (priv->layout_style)
{
case GTK_BUTTONBOX_SPREAD:
if (orientation == GTK_ORIENTATION_HORIZONTAL)
requisition->width = total_size + ((nvis_children + 1)*spacing);
else
requisition->height = total_size + ((nvis_children + 1)*spacing);
break;
case GTK_BUTTONBOX_EDGE:
case GTK_BUTTONBOX_START:
case GTK_BUTTONBOX_END:
case GTK_BUTTONBOX_CENTER:
if (orientation == GTK_ORIENTATION_HORIZONTAL)
requisition->width = total_size + ((nvis_children - 1)*spacing);
else
requisition->height = total_size + ((nvis_children - 1)*spacing);
break;
default:
g_assert_not_reached ();
break;
}
if (orientation == GTK_ORIENTATION_HORIZONTAL)
requisition->height = max_size;
else
requisition->width = max_size;
}
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
requisition->width += border_width * 2;
requisition->height += border_width * 2;
}
static void
gtk_button_box_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkButtonBoxPrivate *priv;
GtkButtonBox *bbox;
GList *children, *list;
GtkAllocation child_allocation;
gint nvis_children;
gint n_primaries;
gint n_secondaries;
gint x = 0;
gint y = 0;
gint secondary_x = 0;
gint secondary_y = 0;
gint width = 0;
gint height = 0;
gint childspacing = 0;
gint spacing;
guint border_width;
GtkOrientation orientation;
gint ipad_x, ipad_y;
gint *widths;
gint *heights;
gint *sizes;
gint primary_size;
gint secondary_size;
gint total_size;
gint i;
bbox = GTK_BUTTON_BOX (widget);
priv = bbox->priv;
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (widget));
spacing = gtk_box_get_spacing (GTK_BOX (widget));
gtk_widget_style_get (widget,
"child-internal-pad-x", &ipad_x,
"child-internal-pad-y", &ipad_y,
NULL);
gtk_button_box_child_requisition (widget,
&nvis_children,
&n_secondaries,
&widths, &heights);
n_primaries = nvis_children - n_secondaries;
primary_size = 0;
secondary_size = 0;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
sizes = widths;
else
sizes = heights;
i = 0;
list = children = _gtk_box_get_children (GTK_BOX (widget));
while (children)
{
GtkWidget *child;
child = children->data;
children = children->next;
if (gtk_widget_get_visible (child))
{
if (gtk_button_box_get_child_secondary (bbox, child))
secondary_size += sizes[i];
else
primary_size += sizes[i];
i++;
}
}
total_size = primary_size + secondary_size;
gtk_widget_set_allocation (widget, allocation);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
width = allocation->width - border_width*2;
else
height = allocation->height - border_width*2;
switch (priv->layout_style)
{
case GTK_BUTTONBOX_SPREAD:
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
childspacing = (width - total_size) / (nvis_children + 1);
x = allocation->x + border_width + childspacing;
secondary_x = x + primary_size + n_primaries * childspacing;
}
else
{
childspacing = (height - total_size) / (nvis_children + 1);
y = allocation->y + border_width + childspacing;
secondary_y = y + primary_size + n_primaries * childspacing;
}
break;
case GTK_BUTTONBOX_EDGE:
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
if (nvis_children >= 2)
{
childspacing = (width - total_size) / (nvis_children - 1);
x = allocation->x + border_width;
secondary_x = x + primary_size + n_primaries * childspacing;
}
else
{
/* one or zero children, just center */
childspacing = width;
x = secondary_x = allocation->x
+ (allocation->width - widths[0]) / 2;
}
}
else
{
if (nvis_children >= 2)
{
childspacing = (height - total_size) / (nvis_children - 1);
y = allocation->y + border_width;
secondary_y = y + primary_size + n_primaries * childspacing;
}
else
{
/* one or zero children, just center */
childspacing = height;
y = secondary_y = allocation->y
+ (allocation->height - heights[0]) / 2;
}
}
break;
case GTK_BUTTONBOX_START:
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
childspacing = spacing;
x = allocation->x + border_width;
secondary_x = allocation->x + allocation->width
- secondary_size - spacing * (n_secondaries - 1) - border_width;
}
else
{
childspacing = spacing;
y = allocation->y + border_width;
secondary_y = allocation->y + allocation->height
- secondary_size - spacing * (n_secondaries - 1) - border_width;
}
break;
case GTK_BUTTONBOX_END:
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
childspacing = spacing;
x = allocation->x + allocation->width
- primary_size - spacing * (n_primaries - 1) - border_width;
secondary_x = allocation->x + border_width;
}
else
{
childspacing = spacing;
y = allocation->y + allocation->height
- primary_size - spacing * (n_primaries - 1) - border_width;
secondary_y = allocation->y + border_width;
}
break;
case GTK_BUTTONBOX_CENTER:
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
childspacing = spacing;
x = allocation->x +
(allocation->width
- (primary_size + spacing * (n_primaries - 1))) / 2
+ (secondary_size + n_secondaries * spacing) / 2;
secondary_x = allocation->x + border_width;
}
else
{
childspacing = spacing;
y = allocation->y +
(allocation->height
- (primary_size + spacing * (n_primaries - 1))) / 2
+ (secondary_size + n_secondaries * spacing) / 2;
secondary_y = allocation->y + border_width;
}
break;
default:
g_assert_not_reached ();
break;
}
children = list;
i = 0;
while (children)
{
GtkWidget *child;
child = children->data;
children = children->next;
if (gtk_widget_get_visible (child))
{
child_allocation.width = widths[i];
child_allocation.height = heights[i];
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
child_allocation.y = allocation->y + (allocation->height - child_allocation.height) / 2;
if (gtk_button_box_get_child_secondary (bbox, child))
{
child_allocation.x = secondary_x;
secondary_x += child_allocation.width + childspacing;
}
else
{
child_allocation.x = x;
x += child_allocation.width + childspacing;
}
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
child_allocation.x = (allocation->x + allocation->width)
- (child_allocation.x + child_allocation.width - allocation->x);
}
else
{
child_allocation.x = allocation->x + (allocation->width - child_allocation.width) / 2;
if (gtk_button_box_get_child_secondary (bbox, child))
{
child_allocation.y = secondary_y;
secondary_y += child_allocation.height + childspacing;
}
else
{
child_allocation.y = y;
y += child_allocation.height + childspacing;
}
}
gtk_widget_size_allocate (child, &child_allocation);
i++;
}
}
g_list_free (list);
g_free (widths);
g_free (heights);
}
/**
* gtk_button_box_new:
* @orientation: the box' orientation.
*
* Creates a new #GtkButtonBox.
*
* Return value: a new #GtkButtonBox.
*
* Since: 3.0
*/
GtkWidget *
gtk_button_box_new (GtkOrientation orientation)
{
return g_object_new (GTK_TYPE_BUTTON_BOX,
"orientation", orientation,
NULL);
}
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