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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2008 Blender Foundation.
 * All rights reserved.
 *
 * 
 * Contributor(s): Blender Foundation
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file blender/editors/space_time/time_ops.c
 *  \ingroup sptime
 */


#include <stdlib.h>
#include <math.h>

#include "DNA_scene_types.h"

#include "BLI_blenlib.h"
#include "BLI_utildefines.h"

#include "BKE_context.h"

#include "ED_anim_api.h"
#include "ED_screen.h"

#include "WM_api.h"
#include "WM_types.h"

#include "time_intern.h"


/* ************************ View All Operator *******************************/

static int time_view_all_exec(bContext *C, wmOperator *UNUSED(op))
{
	Scene *scene = CTX_data_scene(C);
	ARegion *ar = CTX_wm_region(C);

	if (ELEM(NULL, scene, ar))
		return OPERATOR_CANCELLED;

	View2D *v2d = &ar->v2d;

	/* set extents of view to start/end frames (Preview Range too) */
	v2d->cur.xmin = (float)PSFRA;
	v2d->cur.xmax = (float)PEFRA;
	
	/* we need an extra "buffer" factor on either side so that the endpoints are visible */
	const float extra = 0.01f * BLI_rctf_size_x(&v2d->cur);
	v2d->cur.xmin -= extra;
	v2d->cur.xmax += extra;
	
	/* this only affects this TimeLine instance, so just force redraw of this region */
	ED_region_tag_redraw(ar);
	
	return OPERATOR_FINISHED;
}

static void TIME_OT_view_all(wmOperatorType *ot)
{
	/* identifiers */
	ot->name = "View All";
	ot->idname = "TIME_OT_view_all";
	ot->description = "Show the entire playable frame range";
	
	/* api callbacks */
	ot->exec = time_view_all_exec;
	ot->poll = ED_operator_timeline_active;
	
	/* flags */
	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
}

/* ************************ View Frame Operator *******************************/

static int time_view_frame_exec(bContext *C, wmOperator *op)
{
	const int smooth_viewtx = WM_operator_smooth_viewtx_get(op);
	ANIM_center_frame(C, smooth_viewtx);
	
	return OPERATOR_FINISHED;
}

static void TIME_OT_view_frame(wmOperatorType *ot)
{
	/* identifiers */
	ot->name = "View Frame";
	ot->idname = "TIME_OT_view_frame";
	ot->description = "Reset viewable area to show range around current frame";
	
	/* api callbacks */
	ot->exec = time_view_frame_exec;
	ot->poll = ED_operator_timeline_active;
	
	/* flags */
	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
}

/* ************************** registration **********************************/

void time_operatortypes(void)
{
	WM_operatortype_append(TIME_OT_view_all);
	WM_operatortype_append(TIME_OT_view_frame);
}

void time_keymap(wmKeyConfig *keyconf)
{
	wmKeyMap *keymap = WM_keymap_find(keyconf, "Timeline", SPACE_TIME, 0);
	
	WM_keymap_add_item(keymap, "ANIM_OT_start_frame_set", SKEY, KM_PRESS, 0, 0);
	WM_keymap_add_item(keymap, "ANIM_OT_end_frame_set", EKEY, KM_PRESS, 0, 0);
	WM_keymap_add_item(keymap, "TIME_OT_view_all", HOMEKEY, KM_PRESS, 0, 0);
#ifdef WITH_INPUT_NDOF
	WM_keymap_add_item(keymap, "TIME_OT_view_all", NDOF_BUTTON_FIT, KM_PRESS, 0, 0);
#endif
	WM_keymap_add_item(keymap, "TIME_OT_view_frame", PAD0, KM_PRESS, 0, 0);
}