/*
-----------------------------------------------------------------------------
This source file is part of OpenSpace3D
For the latest info, see http://www.openspace3d.com

Copyright (c) 2012 I-maginer

This program 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 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser 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, or go to
http://www.gnu.org/copyleft/lesser.txt

-----------------------------------------------------------------------------
*/


fun deleteOb(inst)=
  0;;


fun cbInput(inst, from, action, param, rep, p) =
  let p -> [nb loop pos] in
  if pos == nil then nil else
    SendPluginEvent inst (strcat "Out" itoa pos) param rep;
  0;;


fun cbSetPosition(inst, from, action, param, rep, p) =
  let p -> [nb loop pos] in
  if (param == nil) || ((atoi param) > nb) then nil else
    mutate p <- [_ _ (atoi param)];
  0;;


fun cbPrev(inst, from, action, param, rep, p) =
  let p -> [nb loop pos] in
  let if (pos - 1) < 1 then (if (loop) then nb else pos) else (pos - 1) -> prev in
    mutate p <- [_ _ prev];
  0;;


fun cbNext(inst, from, action, param, rep, p) =
  let p -> [nb loop pos] in
  let if ((pos + 1) > nb) then (if (loop) then 1 else pos) else (pos + 1) -> nxt in
    mutate p <- [_ _ nxt];
  0;;


fun newOb(inst)=
  let atoi (getPluginInstanceParam inst "nb") -> nb in
  let atoi (getPluginInstanceParam inst "pos") -> pos in
  let atoi (getPluginInstanceParam inst "loop") -> loop in
  let if loop == nil then 1 else loop -> loop in
  let [nb loop pos] -> p in
  (
    PluginRegisterAction inst "Input" mkfun6 @cbInput p;
    PluginRegisterAction inst "Next" mkfun6 @cbNext p;
    PluginRegisterAction inst "Previous" mkfun6 @cbPrev p;
    PluginRegisterAction inst "Set position" mkfun6 @cbSetPosition p;
  );
  
  setPluginInstanceCbDel inst @deleteOb;
  0;;


fun IniPlug(file)=
  PlugRegister @newOb nil;
  setPluginEditor @dynamicedit;
  0;;