/*

 * Enano JWS - Javascript Windowing System

 * Sorry if I stole the name ;)

 * Copyright (C) 2006-2007 Dan Fuhry

 * Yes, it's part of Enano, so it's GPL

 */

  var position;

  function getScrollOffset()

  {

    var position;

    if (self.pageYOffset)

    {

      position = self.pageYOffset;

    }

    else if (document.documentElement && document.documentElement.scrollTop)

    {

      position = document.documentElement.scrollTop;

    }

    else if (document.body)

    {

      position = document.body.scrollTop;

    }

    return position;

  }

  position = getScrollOffset();

  var jws = {

    position : position,

    obj : null,

    startup : function() {

      jws.debug('jws.startup()');

      var divs = document.getElementsByTagName('div');

      if(IE) { position = document.body.scrollTop; }

      else   { position = window.pageYOffset; }

      for(i=0;i<divs.length;i++) {

        if(divs[i].id && divs[i].id.substr(0, 4) == 'root') {

          divs[i].onClick = 'jws.focus(\''+divs[i].id+'\')';

          var tb = i + 1

          tb = divs[tb];

          tb.innerHTML = '<table border="0" width="100%"><tr><td>' + tb.innerHTML + '</td><td align="right"><div align="center" class="closebtn" onclick="jws.closeWin(\''+divs[i].id+'\');">X</div></td></tr></table>';

          divs[i].style.width = '640px';

          divs[i].style.height = '480px';

          Drag.init(tb, divs[i]);

        }

      }

    },

    initWindow : function(o) {

      jws.debug('jws.initWindow('+o+' ['+o.id+'])');

      var divs = document.getElementsByTagName('div');

      for(i=0;i<divs.length;i++) {

        if(divs[i].id && divs[i].id == o.id) {

          var tb = i + 1

          tb = divs[tb];

          tb.innerHTML = '<table border="0" width="100%"><tr><td>' + tb.innerHTML + '</td><td align="right"><div class="closebtn" onclick="jws.closeWin(\''+divs[i].id+'\');"></div></td></tr></table>';

          divs[i].style.width = '640px';

          divs[i].style.height = '480px';

          Drag.init(tb, divs[i]);

        }

      }

    },

    closeWin : function(id) {

      jws.debug('jws.closeWin(\''+id+'\')');

      document.getElementById(id).style.display = 'none';

      enlighten();

    },

    openWin : function(id, x, y) {

      darken();

      var e = document.getElementById(id);

      if(!x) x = 640;

      if(!y) y = 480;

      jws.debug('jws.openWin(\''+id+'\', '+x+', '+y+')');

      e.style.display = 'block';

      e.style.width   = x+'px';

      e.style.height  = y+'px';

      var divs = document.getElementsByTagName('div');

      for(i=0;i<divs.length;i++) {

        if(divs[i].id && divs[i].id == e.id) {

          var cn = i + 3;

          cn = divs[cn];

          var h = getElementHeight(e.id) - 53;

          var w = getElementWidth(cn.id) - 20;

          cn.style.width   =  w + 'px';

          cn.style.height  =  h + 'px';

          cn.style.clip.top = 0 + 'px';

          cn.style.clip.left = 0 + 'px';

          cn.style.clip.right =  w + 'px';

          cn.style.clip.bottom = h + 'px';

          cn.style.overflow = 'auto';

        }

      }

      jws.setpos(id);

      jws.focus(id);

    },

    setpos : function(el) {

      jws.debug('jws.setpos(\''+el+'\')');

      el = document.getElementById(el);

      var w = getWidth();

      var h = getHeight();

      var ew = getElementWidth(el.id);

      var eh = getElementHeight(el.id);

      px = (w/2) - (ew/2);

      py = (h/2) - (eh/2);

      if (IE) { position = document.body.scrollTop; }

      else    { position = window.pageYOffset; }

      py=py+0;

      if ( IE )

        el.style.position = "absolute";

      else

        el.style.position = "fixed";

      el.style.left=px+'px';

      el.style.top =py+'px';

    },

    scrollHandler : function() {

      var divs = document.getElementsByTagName('div');

      for(i=0;i<divs.length;i++) {

        if(divs[i].id && divs[i].id.substr(0, 4) == 'root' && divs[i].style.display == 'block') {

          c = divs[i];

          jws.debug('jws.scrollHandler(): moving element: '+c.id);

          var t = c.style.top;

          var py = t.substr(0, t.length - 2);

          py = parseInt(py);

          if(jws.position) { py = py - jws.position; }

          position = getScrollOffset();

          py=py+position;                                                           

          c.style.position = "absolute";

          if(!isNaN(py)) c.style.top =py+'px';

          jws.debug('jws.scrollHandler(): value of py: '+py);

        }

      }

      jws.position = position;

    },

    focus : function(e) {

      e = document.getElementById(e);

      if(e.style.zindex) z = e.style.zindex;

      else z = 1;

      z=z+5;

      e.style.zIndex = z;

    },

    debug : function(t) {

      if(document.getElementById('jsw-debug-console')) {

        dbg = document.getElementById('jsw-debug-console');

        debugdata = dbg.innerHTML;

        dbg.innerHTML = debugdata+"<br />"+t;

      }

    }

  } // class jws

//window.onscroll=jws['scrollHandler'];

/*

 * Utility functions

 */

// getElementWidth() and getElementHeight()

// Source: http://www.aspandjavascript.co.uk/javascript/javascript_api/get_element_width_height.asp

function getElementHeight(Elem) {

  if (ns4) 

  {

    var elem = getObjNN4(document, Elem);

    return elem.clip.height;

  } 

  else

  {

    if(document.getElementById) 

    {

      var elem = document.getElementById(Elem);

    }

    else if (document.all)

    {

      var elem = document.all[Elem];

    }

    if (op5) 

    { 

      xPos = elem.style.pixelHeight;

    }

    else

    {

      xPos = elem.offsetHeight;

    }

    return xPos;

  } 

}

function getElementWidth(Elem) {

  if (ns4) {

    var elem = getObjNN4(document, Elem);

    return elem.clip.width;

  } else {

    if(document.getElementById) {

      var elem = document.getElementById(Elem);

    } else if (document.all){

      var elem = document.all[Elem];

    }

    if (op5) {

      xPos = elem.style.pixelWidth;

    } else {

      xPos = elem.offsetWidth;

    }

    return xPos;

  }

}

function getHeight() {

  var myHeight = 0;

  if( typeof( window.innerWidth ) == 'number' ) {

    myHeight = window.innerHeight;

  } else if( document.documentElement &&

      ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {

    myHeight = document.documentElement.clientHeight;

  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {

    myHeight = document.body.clientHeight;

  }

  return myHeight;

}

function getWidth() {

  var myWidth = 0;

  if( typeof( window.innerWidth ) == 'number' ) {

    myWidth = window.innerWidth;

  } else if( document.documentElement &&

      ( document.documentElement.clientWidth || document.documentElement.clientWidth ) ) {

    myWidth = document.documentElement.clientWidth;

  } else if( document.body && ( document.body.clientWidth || document.body.clientWidth ) ) {

    myWidth = document.body.clientWidth;

  }

  return myWidth;

}

/**************************************************

 * dom-drag.js

 * 09.25.2001

 * www.youngpup.net

 * The original version of this code is in the

 * public domain. We have relicensed this modified

 * version under the GPL version 2 or later for

 * Enano.

 **************************************************/

var Drag = {

  obj : null,

  init : function(o, oRoot, minX, maxX, minY, maxY, bSwapHorzRef, bSwapVertRef, fXMapper, fYMapper)

  {

    o.onmousedown	= Drag.start;

    o.hmode			= bSwapHorzRef ? false : true ;

    o.vmode			= bSwapVertRef ? false : true ;

    o.root = oRoot && oRoot != null ? oRoot : o ;

    if (o.hmode  && isNaN(parseInt(o.root.style.left  ))) o.root.style.left   = "0px";

    if (o.vmode  && isNaN(parseInt(o.root.style.top   ))) o.root.style.top    = "0px";

    if (!o.hmode && isNaN(parseInt(o.root.style.right ))) o.root.style.right  = "0px";

    if (!o.vmode && isNaN(parseInt(o.root.style.bottom))) o.root.style.bottom = "0px";

    o.minX	= typeof minX != 'undefined' ? minX : null;

    o.minY	= typeof minY != 'undefined' ? minY : null;

    o.maxX	= typeof maxX != 'undefined' ? maxX : null;

    o.maxY	= typeof maxY != 'undefined' ? maxY : null;

    o.xMapper = fXMapper ? fXMapper : null;

    o.yMapper = fYMapper ? fYMapper : null;

    o.root.onDragStart	= new Function();

    o.root.onDragEnd	= new Function();

    o.root.onDrag		= new Function();

  },

  start : function(e)

  {

    var o = Drag.obj = this;

    e = Drag.fixE(e);

    var y = parseInt(o.vmode ? o.root.style.top  : o.root.style.bottom);

    var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );

    o.root.onDragStart(x, y);

    o.lastMouseX	= e.clientX;

    o.lastMouseY	= e.clientY;

    if (o.hmode) {

      if (o.minX != null)	o.minMouseX	= e.clientX - x + o.minX;

      if (o.maxX != null)	o.maxMouseX	= o.minMouseX + o.maxX - o.minX;

    } else {

      if (o.minX != null) o.maxMouseX = -o.minX + e.clientX + x;

      if (o.maxX != null) o.minMouseX = -o.maxX + e.clientX + x;

    }

    if (o.vmode) {

      if (o.minY != null)	o.minMouseY	= e.clientY - y + o.minY;

      if (o.maxY != null)	o.maxMouseY	= o.minMouseY + o.maxY - o.minY;

    } else {

      if (o.minY != null) o.maxMouseY = -o.minY + e.clientY + y;

      if (o.maxY != null) o.minMouseY = -o.maxY + e.clientY + y;

    }

    document.onmousemove	= Drag.drag;

    document.onmouseup		= Drag.end;

    return false;

  },

  drag : function(e)

  {

    e = Drag.fixE(e);

    var o = Drag.obj;

    var ey	= e.clientY;

    var ex	= e.clientX;

    var y = parseInt(o.vmode ? o.root.style.top  : o.root.style.bottom);

    var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );

    var nx, ny;

    if (o.minX != null) ex = o.hmode ? Math.max(ex, o.minMouseX) : Math.min(ex, o.maxMouseX);

    if (o.maxX != null) ex = o.hmode ? Math.min(ex, o.maxMouseX) : Math.max(ex, o.minMouseX);

    if (o.minY != null) ey = o.vmode ? Math.max(ey, o.minMouseY) : Math.min(ey, o.maxMouseY);

    if (o.maxY != null) ey = o.vmode ? Math.min(ey, o.maxMouseY) : Math.max(ey, o.minMouseY);

    nx = x + ((ex - o.lastMouseX) * (o.hmode ? 1 : -1));

    ny = y + ((ey - o.lastMouseY) * (o.vmode ? 1 : -1));

    if (o.xMapper)		nx = o.xMapper(y)

    else if (o.yMapper)	ny = o.yMapper(x)

    Drag.obj.root.style[o.hmode ? "left" : "right"] = nx + "px";

    Drag.obj.root.style[o.vmode ? "top" : "bottom"] = ny + "px";

    Drag.obj.lastMouseX	= ex;

    Drag.obj.lastMouseY	= ey;

    Drag.obj.root.onDrag(nx, ny);

    return false;

  },

  end : function()

  {

    document.onmousemove = getMouseXY;

    document.onmouseup   = null;

    Drag.obj.root.onDragEnd(	parseInt(Drag.obj.root.style[Drag.obj.hmode ? "left" : "right"]), 

                  parseInt(Drag.obj.root.style[Drag.obj.vmode ? "top" : "bottom"]));

    Drag.obj = null;

  },

  fixE : function(e)

  {

    if (typeof e == 'undefined') e = window.event;

    if (typeof e.layerX == 'undefined') e.layerX = e.offsetX;

    if (typeof e.layerY == 'undefined') e.layerY = e.offsetY;

    return e;

  }

};