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gimp/app/edit_selection.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include <stdarg.h>
#include "gdk/gdkkeysyms.h"
#include "appenv.h"
#include "draw_core.h"
#include "drawable.h"
#include "tools.h"
#include "edit_selection.h"
#include "floating_sel.h"
#include "gimage_mask.h"
#include "gdisplay.h"
#include "undo.h"
#include "gimprc.h"
#include "libgimp/gimpintl.h"
#define EDIT_SELECT_SCROLL_LOCK FALSE
#define ARROW_VELOCITY 25
#define STATUSBAR_SIZE 128
typedef struct _EditSelection EditSelection;
struct _EditSelection
{
int origx, origy; /* last x and y coords */
int cumlx, cumly; /* cumulative changes to x and yed */
int x, y; /* current x and y coords */
int x1, y1; /* bounding box of selection mask */
int x2, y2;
EditType edit_type; /* translate the mask or layer? */
DrawCore * core; /* selection core for drawing bounds*/
ButtonReleaseFunc old_button_release;/* old button press member func */
MotionFunc old_motion; /* old motion member function */
ToolCtlFunc old_control; /* old control member function */
CursorUpdateFunc old_cursor_update; /* old cursor update function */
gboolean old_scroll_lock; /* old value of scroll lock */
gboolean old_auto_snap_to; /* old value of auto snap to */
guint context_id; /* for the statusbar */
};
/* static EditSelection structure--there is ever only one present */
static EditSelection edit_select;
static void
edit_selection_snap (GDisplay *gdisp,
int x,
int y)
{
int x1, y1;
int x2, y2;
int dx, dy;
gdisplay_untransform_coords (gdisp, x, y, &x, &y, FALSE, TRUE);
dx = x - edit_select.origx;
dy = y - edit_select.origy;
x1 = edit_select.x1 + dx;
y1 = edit_select.y1 + dy;
x2 = edit_select.x2 + dx;
y2 = edit_select.y2 + dy;
gdisplay_transform_coords (gdisp, x1, y1, &x1, &y1, TRUE);
gdisplay_transform_coords (gdisp, x2, y2, &x2, &y2, TRUE);
gdisplay_snap_rectangle (gdisp, x1, y1, x2, y2, &x1, &y1);
gdisplay_untransform_coords (gdisp, x1, y1, &x1, &y1, FALSE, TRUE);
edit_select.x = x1 - (edit_select.x1 - edit_select.origx);
edit_select.y = y1 - (edit_select.y1 - edit_select.origy);
}
void
init_edit_selection (Tool *tool,
gpointer gdisp_ptr,
GdkEventButton *bevent,
EditType edit_type)
{
GDisplay *gdisp;
Layer *layer;
int x, y;
gdisp = (GDisplay *) gdisp_ptr;
undo_push_group_start (gdisp->gimage, MISC_UNDO);
/* Move the (x, y) point from screen to image space */
gdisplay_untransform_coords (gdisp, bevent->x, bevent->y, &x, &y, FALSE, TRUE);
edit_select.x = edit_select.origx = x;
edit_select.y = edit_select.origy = y;
edit_select.cumlx = 0;
edit_select.cumly = 0;
/* Make a check to see if it should be a floating selection translation */
if (edit_type == MaskToLayerTranslate && gimage_floating_sel (gdisp->gimage))
edit_type = FloatingSelTranslate;
if (edit_type == LayerTranslate)
{
layer = gimage_get_active_layer (gdisp->gimage);
if (layer_is_floating_sel (layer))
edit_type = FloatingSelTranslate;
}
edit_select.edit_type = edit_type;
edit_select.old_button_release = tool->button_release_func;
edit_select.old_motion = tool->motion_func;
edit_select.old_control = tool->control_func;
edit_select.old_cursor_update = tool->cursor_update_func;
edit_select.old_scroll_lock = tool->scroll_lock;
edit_select.old_auto_snap_to = tool->auto_snap_to;
/* find the bounding box of the selection mask -
* this is used for the case of a MaskToLayerTranslate,
* where the translation will result in floating the selection
* mask and translating the resulting layer
*/
drawable_mask_bounds (gimage_active_drawable (gdisp->gimage),
&edit_select.x1, &edit_select.y1,
&edit_select.x2, &edit_select.y2);
edit_selection_snap (gdisp, bevent->x, bevent->y);
/* reset the function pointers on the selection tool */
tool->button_release_func = edit_selection_button_release;
tool->motion_func = edit_selection_motion;
tool->control_func = edit_selection_control;
tool->cursor_update_func = edit_selection_cursor_update;
tool->scroll_lock = EDIT_SELECT_SCROLL_LOCK;
tool->auto_snap_to = FALSE;
/* pause the current selection */
selection_pause (gdisp->select);
/* initialize the statusbar display */
edit_select.context_id = gtk_statusbar_get_context_id (GTK_STATUSBAR (gdisp->statusbar), "edit_select");
gtk_statusbar_push (GTK_STATUSBAR (gdisp->statusbar), edit_select.context_id, _("Move: 0, 0"));
/* Create and start the selection core */
edit_select.core = draw_core_new (edit_selection_draw);
draw_core_start (edit_select.core,
gdisp->canvas->window,
tool);
}
void
edit_selection_button_release (Tool *tool,
GdkEventButton *bevent,
gpointer gdisp_ptr)
{
/* don't remove these unused vars yet --adam */
int x, y;
GDisplay * gdisp;
Layer *layer;
Layer *floating_layer;
GSList *layer_list;
gdisp = (GDisplay *) gdisp_ptr;
/* resume the current selection and ungrab the pointer */
selection_resume (gdisp->select);
gdk_pointer_ungrab (bevent->time);
gdk_flush ();
gtk_statusbar_pop (GTK_STATUSBAR(gdisp->statusbar), edit_select.context_id);
/* Stop and free the selection core */
draw_core_stop (edit_select.core, tool);
draw_core_free (edit_select.core);
edit_select.core = NULL;
tool->state = INACTIVE;
tool->button_release_func = edit_select.old_button_release;
tool->motion_func = edit_select.old_motion;
tool->control_func = edit_select.old_control;
tool->cursor_update_func = edit_select.old_cursor_update;
tool->scroll_lock = edit_select.old_scroll_lock;
tool->auto_snap_to = edit_select.old_auto_snap_to;
#if 0
/****************************************************************************/
/****************************************************************************/
/* This work is all done in the motion handler now - will be removed soon */
/****************************************************************************/
/****************************************************************************/
/* If the cancel button is down...Do nothing */
if (! (bevent->state & GDK_BUTTON3_MASK))
{
edit_selection_snap (gdisp, bevent->x, bevent->y);
x = edit_select.x;
y = edit_select.y;
/* if there has been movement, move the selection */
if (edit_select.origx != x || edit_select.origy != y)
{
switch (edit_select.edit_type)
{
case MaskTranslate:
/* translate the selection */
gimage_mask_translate (gdisp->gimage, (x - edit_select.origx),
(y - edit_select.origy));
break;
case MaskToLayerTranslate:
gimage_mask_float (gdisp->gimage, gimage_active_drawable (gdisp->gimage),
(x - edit_select.origx),
(y - edit_select.origy));
break;
case LayerTranslate:
if ((floating_layer = gimage_floating_sel (gdisp->gimage)))
floating_sel_relax (floating_layer, TRUE);
/* translate the layer--and any "linked" layers as well */
layer_list = gdisp->gimage->layers;
while (layer_list)
{
layer = (Layer *) layer_list->data;
if (layer == gdisp->gimage->active_layer ||
layer_linked (layer))
{
layer_translate (layer, (x - edit_select.origx), (y - edit_select.origy));
}
layer_list = g_slist_next (layer_list);
}
if (floating_layer)
floating_sel_rigor (floating_layer, TRUE);
break;
case FloatingSelTranslate:
layer = gimage_get_active_layer (gdisp->gimage);
floating_sel_relax (layer, TRUE);
layer_translate (layer, (x - edit_select.origx), (y - edit_select.origy));
floating_sel_rigor (layer, TRUE);
break;
}
}
/* if no movement has occured, clear the current selection */
else if ((edit_select.edit_type == MaskTranslate) ||
(edit_select.edit_type == MaskToLayerTranslate))
gimage_mask_clear (gdisp->gimage);
/* if no movement occured and the type is LayerTranslate,
* check if the layer is a floating selection. If so, anchor.
*/
else if (edit_select.edit_type == FloatingSelTranslate)
{
layer = gimage_get_active_layer (gdisp->gimage);
if (layer_is_floating_sel (layer))
floating_sel_anchor (layer);
}
}
undo_push_group_end (gdisp->gimage);
#else
if (edit_select.cumlx == 0 && edit_select.cumly == 0)
{
/* The user either didn't actually move the selection,
or moved it around and eventually just put it back in
exactly the same spot. */
if ((edit_select.edit_type == MaskTranslate) ||
(edit_select.edit_type == MaskToLayerTranslate))
gimage_mask_clear (gdisp->gimage);
/* if no movement occured and the type is LayerTranslate,
check if the layer is a floating selection. If so, anchor. */
else if (edit_select.edit_type == FloatingSelTranslate)
{
layer = gimage_get_active_layer (gdisp->gimage);
if (layer_is_floating_sel (layer))
floating_sel_anchor (layer);
}
}
undo_push_group_end (gdisp->gimage);
if (bevent->state & GDK_BUTTON2_MASK) /* OPERATION CANCELLED */
{
/* Operation cancelled - undo the undo-group! */
undo_pop(gdisp->gimage);
}
#endif
gdisplays_flush ();
}
void
edit_selection_motion (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
GDisplay * gdisp;
gchar offset[STATUSBAR_SIZE];
if (tool->state != ACTIVE)
{
g_warning ("Tracking motion while !ACTIVE");
return;
}
gdisp = (GDisplay *) gdisp_ptr;
gdk_flush();
draw_core_pause (edit_select.core, tool);
edit_selection_snap (gdisp, mevent->x, mevent->y);
/**********************************************adam hack*************/
/********************************************************************/
{
gint x,y;
Layer *layer;
Layer *floating_layer;
GSList *layer_list;
edit_selection_snap (gdisp, mevent->x, mevent->y);
x = edit_select.x;
y = edit_select.y;
/* if there has been movement, move the selection */
if (edit_select.origx != x || edit_select.origy != y)
{
gint xoffset, yoffset;
xoffset = x - edit_select.origx;
yoffset = y - edit_select.origy;
edit_select.cumlx += xoffset;
edit_select.cumly += yoffset;
switch (edit_select.edit_type)
{
case MaskTranslate:
/* translate the selection */
gimage_mask_translate (gdisp->gimage, xoffset, yoffset);
/*g_warning("%d,%d %d,%d %d,%d %d,%d %d,%d %d,%d",
edit_select.origx,edit_select.origy,
edit_select.cumlx,edit_select.cumly,
xoffset,yoffset,
x,y,
edit_select.x1,edit_select.y1,
edit_select.x2,edit_select.y2);*/
edit_select.origx = x;
edit_select.origy = y;
break;
case LayerTranslate:
if ((floating_layer = gimage_floating_sel (gdisp->gimage)))
floating_sel_relax (floating_layer, TRUE);
/* translate the layer--and any "linked" layers as well */
layer_list = gdisp->gimage->layers;
while (layer_list)
{
layer = (Layer *) layer_list->data;
if (layer == gdisp->gimage->active_layer ||
layer_linked (layer))
{
layer_translate (layer, xoffset, yoffset);
}
layer_list = g_slist_next (layer_list);
}
if (floating_layer)
floating_sel_rigor (floating_layer, TRUE);
break;
case MaskToLayerTranslate:
gimage_mask_float (gdisp->gimage, gimage_active_drawable (gdisp->gimage),
0, 0);
edit_select.edit_type = FloatingSelTranslate;
edit_select.origx -= edit_select.x1;
edit_select.origy -= edit_select.y1;
break;
case FloatingSelTranslate:
layer = gimage_get_active_layer (gdisp->gimage);
floating_sel_relax (layer, TRUE);
layer_translate (layer, xoffset, yoffset);
floating_sel_rigor (layer, TRUE);
break;
default:
g_warning ("esm / BAD FALLTHROUGH");
}
}
gdisplay_flush(gdisp);
}
/********************************************************************/
/********************************************************************/
gtk_statusbar_pop (GTK_STATUSBAR(gdisp->statusbar), edit_select.context_id);
if (gdisp->dot_for_dot)
{
g_snprintf (offset, STATUSBAR_SIZE, gdisp->cursor_format_str,
_("Move: "),
edit_select.cumlx,
", ",
edit_select.cumly);
}
else /* show real world units */
{
gdouble unit_factor = gimp_unit_get_factor (gdisp->gimage->unit);
g_snprintf (offset, STATUSBAR_SIZE, gdisp->cursor_format_str,
_("Move: "),
(edit_select.cumlx) * unit_factor /
gdisp->gimage->xresolution,
", ",
(edit_select.cumly) * unit_factor /
gdisp->gimage->yresolution);
}
gtk_statusbar_push (GTK_STATUSBAR(gdisp->statusbar), edit_select.context_id,
offset);
draw_core_resume (edit_select.core, tool);
}
void
edit_selection_draw (Tool *tool)
{
int i;
int diff_x, diff_y;
GDisplay * gdisp;
GdkSegment * seg;
Selection * select;
Layer *layer;
GSList *layer_list;
int floating_sel;
int x1, y1, x2, y2;
int x3, y3, x4, y4;
int off_x, off_y;
gdisp = (GDisplay *) tool->gdisp_ptr;
select = gdisp->select;
if (edit_select.edit_type == FloatingSelTranslate ||
edit_select.edit_type == MaskTranslate)
{
diff_x = SCALEX (gdisp, edit_select.cumlx);
diff_y = SCALEY (gdisp, edit_select.cumly);
}
else
{
diff_x = 0;
diff_y = 0;
}
switch (edit_select.edit_type)
{
case MaskTranslate:
layer = gimage_get_active_layer (gdisp->gimage);
floating_sel = layer_is_floating_sel (layer);
/* offset the current selection */
seg = select->segs_in;
for (i = 0; i < select->num_segs_in; i++)
{
seg->x1 += diff_x;
seg->x2 += diff_x;
seg->y1 += diff_y;
seg->y2 += diff_y;
seg++;
}
seg = select->segs_out;
for (i = 0; i < select->num_segs_out; i++)
{
seg->x1 += diff_x;
seg->x2 += diff_x;
seg->y1 += diff_y;
seg->y2 += diff_y;
seg++;
}
if (! floating_sel)
gdk_draw_segments (edit_select.core->win, edit_select.core->gc,
select->segs_in, select->num_segs_in);
gdk_draw_segments (edit_select.core->win, edit_select.core->gc,
select->segs_out, select->num_segs_out);
/* reset the the current selection */
seg = select->segs_in;
for (i = 0; i < select->num_segs_in; i++)
{
seg->x1 -= diff_x;
seg->x2 -= diff_x;
seg->y1 -= diff_y;
seg->y2 -= diff_y;
seg++;
}
seg = select->segs_out;
for (i = 0; i < select->num_segs_out; i++)
{
seg->x1 -= diff_x;
seg->x2 -= diff_x;
seg->y1 -= diff_y;
seg->y2 -= diff_y;
seg++;
}
break;
case MaskToLayerTranslate:
gdisplay_transform_coords (gdisp, edit_select.x1, edit_select.y1, &x1, &y1, TRUE);
gdisplay_transform_coords (gdisp, edit_select.x2, edit_select.y2, &x2, &y2, TRUE);
gdk_draw_rectangle (edit_select.core->win,
edit_select.core->gc, 0,
x1 + diff_x, y1 + diff_y,
(x2 - x1) - 1, (y2 - y1) - 1);
break;
case LayerTranslate:
gdisplay_transform_coords (gdisp, 0, 0, &x1, &y1, TRUE);
gdisplay_transform_coords (gdisp,
drawable_width ( GIMP_DRAWABLE (gdisp->gimage->active_layer)),
drawable_height ( GIMP_DRAWABLE (gdisp->gimage->active_layer)),
&x2, &y2, TRUE);
/* Now, expand the rectangle to include all linked layers as well */
layer_list = gdisp->gimage->layers;
while (layer_list)
{
layer = (Layer *) layer_list->data;
if (((layer) != gdisp->gimage->active_layer) && layer_linked (layer))
{
drawable_offsets (GIMP_DRAWABLE (layer), &off_x, &off_y);
gdisplay_transform_coords (gdisp, off_x, off_y, &x3, &y3, FALSE);
gdisplay_transform_coords (gdisp,
off_x + drawable_width (GIMP_DRAWABLE (layer)),
off_y + drawable_height (GIMP_DRAWABLE (layer)),
&x4, &y4, FALSE);
if (x3 < x1)
x1 = x3;
if (y3 < y1)
y1 = y3;
if (x4 > x2)
x2 = x4;
if (y4 > y2)
y2 = y4;
}
layer_list = g_slist_next (layer_list);
}
gdk_draw_rectangle (edit_select.core->win,
edit_select.core->gc, 0,
x1 + diff_x, y1 + diff_y,
(x2 - x1) - 1, (y2 - y1) - 1);
break;
case FloatingSelTranslate:
seg = select->segs_in;
for (i = 0; i < select->num_segs_in; i++)
{
seg->x1 += diff_x;
seg->x2 += diff_x;
seg->y1 += diff_y;
seg->y2 += diff_y;
seg++;
}
/* Draw the items */
gdk_draw_segments (edit_select.core->win, edit_select.core->gc,
select->segs_in, select->num_segs_in);
/* reset the the current selection */
seg = select->segs_in;
for (i = 0; i < select->num_segs_in; i++)
{
seg->x1 -= diff_x;
seg->x2 -= diff_x;
seg->y1 -= diff_y;
seg->y2 -= diff_y;
seg++;
}
break;
}
}
void
edit_selection_control (Tool *tool,
ToolAction action,
gpointer gdisp_ptr)
{
switch (action)
{
case PAUSE :
draw_core_pause (edit_select.core, tool);
break;
case RESUME :
draw_core_resume (edit_select.core, tool);
break;
case HALT :
draw_core_stop (edit_select.core, tool);
draw_core_free (edit_select.core);
break;
default:
break;
}
}
void
edit_selection_cursor_update (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
GDisplay *gdisp;
gdisp = (GDisplay *) gdisp_ptr;
gdisplay_install_tool_cursor (gdisp, GDK_FLEUR);
}
static int
process_event_queue_keys (GdkEventKey *kevent, ...)
/* GdkKeyType, GdkModifierType, value ... 0
* could move this function to a more central location so it can be used
* by other tools? */
{
#define FILTER_MAX_KEYS 50
va_list argp;
GdkEvent *event;
GList *list = NULL;
guint keys[FILTER_MAX_KEYS];
GdkModifierType modifiers[FILTER_MAX_KEYS];
int values[FILTER_MAX_KEYS];
int i = 0, nkeys = 0, value = 0, done = 0, discard_event;
GtkWidget *orig_widget;
va_start(argp, kevent);
while (nkeys <FILTER_MAX_KEYS && (keys[nkeys] = va_arg (argp, guint)) != 0)
{
modifiers[nkeys] = va_arg (argp, GdkModifierType);
values[nkeys] = va_arg (argp, int);
nkeys++;
}
va_end(argp);
for (i = 0; i < nkeys; i++)
if (kevent->keyval == keys[i] && kevent->state == modifiers[i])
value += values[i];
orig_widget = gtk_get_event_widget((GdkEvent*)kevent);
while (gdk_events_pending() > 0 && !done)
{
discard_event = 0;
event = gdk_event_get();
if (orig_widget != gtk_get_event_widget(event))
{
done = 1;
}
else
{
if (event->any.type == GDK_KEY_PRESS)
{
for (i = 0; i < nkeys; i++)
if (event->key.keyval == keys[i] &&
event->key.state == modifiers[i])
{
discard_event = 1;
value += values[i];
}
if (!discard_event)
done = 1;
}
/* should there be more types here? */
else if (event->any.type != GDK_KEY_RELEASE &&
event->any.type != GDK_MOTION_NOTIFY &&
event->any.type != GDK_EXPOSE)
done = 1;
}
if (!discard_event)
list = g_list_prepend(list, event);
else
gdk_event_free(event);
}
while (list) /* unget the unused events and free the list */
{
gdk_event_put((GdkEvent*)list->data);
gdk_event_free((GdkEvent*)list->data);
list = g_list_remove_link (list, list);
}
return value;
#undef FILTER_MAX_KEYS
}
void
edit_sel_arrow_keys_func (Tool *tool,
GdkEventKey *kevent,
gpointer gdisp_ptr)
{
int inc_x, inc_y, mask_inc_x, mask_inc_y;
GDisplay *gdisp;
Layer *layer;
Layer *floating_layer;
GSList *layer_list;
EditType edit_type;
layer = NULL;
gdisp = (GDisplay *) gdisp_ptr;
inc_x = process_event_queue_keys(kevent,
GDK_Left, 0, -1,
GDK_Left, GDK_SHIFT_MASK, -1*ARROW_VELOCITY,
GDK_Right, 0, 1,
GDK_Right, GDK_SHIFT_MASK, ARROW_VELOCITY,
0);
inc_y = process_event_queue_keys(kevent,
GDK_Up, 0, -1,
GDK_Up, GDK_SHIFT_MASK, -1*ARROW_VELOCITY,
GDK_Down, 0, 1,
GDK_Down, GDK_SHIFT_MASK, ARROW_VELOCITY,
0);
mask_inc_x = process_event_queue_keys(kevent,
GDK_Left, GDK_MOD1_MASK, -1,
GDK_Left, (GDK_MOD1_MASK | GDK_SHIFT_MASK),
-1*ARROW_VELOCITY,
GDK_Right, GDK_MOD1_MASK, 1,
GDK_Right, (GDK_MOD1_MASK | GDK_SHIFT_MASK),
ARROW_VELOCITY,
0);
mask_inc_y = process_event_queue_keys(kevent,
GDK_Up, GDK_MOD1_MASK, -1,
GDK_Up, (GDK_MOD1_MASK | GDK_SHIFT_MASK),
-1*ARROW_VELOCITY,
GDK_Down, GDK_MOD1_MASK, 1,
GDK_Down, (GDK_MOD1_MASK | GDK_SHIFT_MASK),
ARROW_VELOCITY,
0);
if (inc_x == 0 && inc_y == 0 && mask_inc_x == 0 && mask_inc_y == 0)
return;
undo_push_group_start (gdisp->gimage, MISC_UNDO);
if (mask_inc_x != 0 || mask_inc_y != 0)
gimage_mask_translate (gdisp->gimage, mask_inc_x, mask_inc_y);
if (inc_x != 0 || inc_y != 0)
{
layer = gimage_get_active_layer (gdisp->gimage);
if (layer_is_floating_sel (layer))
edit_type = FloatingSelTranslate;
else
edit_type = LayerTranslate;
switch (edit_type)
{
case MaskToLayerTranslate:
gimage_mask_float (gdisp->gimage,
gimage_active_drawable (gdisp->gimage),
inc_x, inc_y);
break;
case LayerTranslate:
if ((floating_layer = gimage_floating_sel (gdisp->gimage)))
floating_sel_relax (floating_layer, TRUE);
/* translate the layer--and any "linked" layers as well */
layer_list = gdisp->gimage->layers;
while (layer_list)
{
layer = (Layer *) layer_list->data;
if (((layer) == gdisp->gimage->active_layer) || layer_linked (layer))
layer_translate (layer, inc_x, inc_y);
layer_list = g_slist_next (layer_list);
}
if (floating_layer)
floating_sel_rigor (floating_layer, TRUE);
break;
case FloatingSelTranslate:
floating_sel_relax (layer, TRUE);
layer_translate (layer, inc_x, inc_y);
floating_sel_rigor (layer, TRUE);
break;
default:
/* this won't occur */
break;
}
}
undo_push_group_end (gdisp->gimage);
gdisplays_flush ();
}
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