/*
 * 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) 2009 Blender Foundation, Joshua Leung
 * All rights reserved.
 */

/** \file
 * \ingroup spnla
 */

#include <stdio.h>
#include <string.h>

#include "DNA_scene_types.h"

#include "BKE_context.h"
#include "BKE_screen.h"

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

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

#include "nla_intern.h" /* own include */

/* ************************** poll callbacks for operators **********************************/

/* Tweak-mode is NOT enabled. */
bool nlaop_poll_tweakmode_off(bContext *C)
{
  Scene *scene;

  /* for now, we check 2 things:
   * 1) active editor must be NLA
   * 2) tweak-mode is currently set as a 'per-scene' flag
   *    so that it will affect entire NLA data-sets,
   *    but not all AnimData blocks will be in tweak-mode for various reasons.
   */
  if (ED_operator_nla_active(C) == 0) {
    return 0;
  }

  scene = CTX_data_scene(C);
  if ((scene == NULL) || (scene->flag & SCE_NLA_EDIT_ON)) {
    return 0;
  }

  return 1;
}

/* Tweak-mode IS enabled. */
bool nlaop_poll_tweakmode_on(bContext *C)
{
  Scene *scene;

  /* for now, we check 2 things:
   * 1) active editor must be NLA
   * 2) tweak-mode is currently set as a 'per-scene' flag
   *    so that it will affect entire NLA data-sets,
   *    but not all AnimData blocks will be in tweak-mode for various reasons.
   */
  if (ED_operator_nla_active(C) == 0) {
    return 0;
  }

  scene = CTX_data_scene(C);
  if ((scene == NULL) || !(scene->flag & SCE_NLA_EDIT_ON)) {
    return 0;
  }

  return 1;
}

/* is tweak-mode enabled - for use in NLA operator code */
bool nlaedit_is_tweakmode_on(bAnimContext *ac)
{
  if (ac && ac->scene) {
    return (ac->scene->flag & SCE_NLA_EDIT_ON) != 0;
  }
  return 0;
}

/* ************************** registration - operator types **********************************/

void nla_operatortypes(void)
{
  /* channels */
  WM_operatortype_append(NLA_OT_channels_click);

  WM_operatortype_append(NLA_OT_action_pushdown);
  WM_operatortype_append(NLA_OT_action_unlink);

  WM_operatortype_append(NLA_OT_tracks_add);
  WM_operatortype_append(NLA_OT_tracks_delete);

  WM_operatortype_append(NLA_OT_selected_objects_add);

  /* select */
  WM_operatortype_append(NLA_OT_click_select);
  WM_operatortype_append(NLA_OT_select_box);
  WM_operatortype_append(NLA_OT_select_all);
  WM_operatortype_append(NLA_OT_select_leftright);

  /* view */
  WM_operatortype_append(NLA_OT_view_all);
  WM_operatortype_append(NLA_OT_view_selected);
  WM_operatortype_append(NLA_OT_view_frame);

  WM_operatortype_append(NLA_OT_previewrange_set);

  /* edit */
  WM_operatortype_append(NLA_OT_tweakmode_enter);
  WM_operatortype_append(NLA_OT_tweakmode_exit);

  WM_operatortype_append(NLA_OT_actionclip_add);
  WM_operatortype_append(NLA_OT_transition_add);
  WM_operatortype_append(NLA_OT_soundclip_add);

  WM_operatortype_append(NLA_OT_meta_add);
  WM_operatortype_append(NLA_OT_meta_remove);

  WM_operatortype_append(NLA_OT_duplicate);
  WM_operatortype_append(NLA_OT_delete);
  WM_operatortype_append(NLA_OT_split);

  WM_operatortype_append(NLA_OT_mute_toggle);

  WM_operatortype_append(NLA_OT_swap);
  WM_operatortype_append(NLA_OT_move_up);
  WM_operatortype_append(NLA_OT_move_down);

  WM_operatortype_append(NLA_OT_action_sync_length);

  WM_operatortype_append(NLA_OT_make_single_user);

  WM_operatortype_append(NLA_OT_apply_scale);
  WM_operatortype_append(NLA_OT_clear_scale);

  WM_operatortype_append(NLA_OT_snap);

  WM_operatortype_append(NLA_OT_fmodifier_add);
  WM_operatortype_append(NLA_OT_fmodifier_copy);
  WM_operatortype_append(NLA_OT_fmodifier_paste);
}

/* ************************** registration - keymaps **********************************/

void nla_keymap(wmKeyConfig *keyconf)
{
  /* keymap for all regions ------------------------------------------- */
  WM_keymap_ensure(keyconf, "NLA Generic", SPACE_NLA, 0);

  /* channels ---------------------------------------------------------- */
  /* Channels are not directly handled by the NLA Editor module, but are inherited from the
   * animation module. Most of the relevant operations, keymaps, drawing, etc. can therefore all
   * be found in that module instead, as there are many similarities with the other
   * animation editors.
   *
   * However, those operations which involve clicking on channels and/or
   * the placement of them in the view are implemented here instead
   */
  WM_keymap_ensure(keyconf, "NLA Channels", SPACE_NLA, 0);

  /* data ------------------------------------------------------------- */
  WM_keymap_ensure(keyconf, "NLA Editor", SPACE_NLA, 0);
}