/*
  * jQuery.splitter.js - two-pane splitter window plugin
  *
  * version 1.51 (2009/01/09)
  *
  * Dual licensed under the MIT and GPL licenses:
  *   http://www.opensource.org/licenses/mit-license.php
  *   http://www.gnu.org/licenses/gpl.html
  */

/**
  * The splitter() plugin implements a two-pane resizable splitter window.
  * The selected elements in the jQuery object are converted to a splitter;
  * each selected element should have two child elements, used for the panes
  * of the splitter. The plugin adds a third child element for the splitbar.
  *
  * For more details see: http://methvin.com/splitter/
  *
  *
  * @example $('#MySplitter').splitter();
  * @desc Create a vertical splitter with default settings
  *
  * @example $('#MySplitter').splitter({type: 'h', accessKey: 'M'});
  * @desc Create a horizontal splitter resizable via Alt+Shift+M
  *
  * @name splitter
  * @type jQuery
  * @param Object options Options for the splitter (not required)
  * @cat Plugins/Splitter
  * @return jQuery
  * @author Dave Methvin (dave.methvin@gmail.com)
  */
  ;(function($){

  $.fn.splitter = function(args){
    args = args || {};
    return this.each(function() {
      var zombie;		// left-behind splitbar for outline resizes
      function startSplitMouse(evt) {
        if ( opts.outline )
          zombie = zombie || bar.clone(false).insertAfter(A);
        panes.css("-webkit-user-select", "none");	// Safari selects A/B text on a move
        bar.addClass(opts.activeClass);
        A._posSplit = A[0][opts.pxSplit] - evt[opts.eventPos];
        $(document)
          .bind("mousemove", doSplitMouse)
          .bind("mouseup", endSplitMouse);
      }
      function doSplitMouse(evt) {
        var newPos = A._posSplit+evt[opts.eventPos];
        if ( opts.outline ) {
          newPos = Math.max(0, Math.min(newPos, splitter._DA - bar._DA));
          bar.css(opts.origin, newPos);
        } else
          resplit(newPos);
      }
      function endSplitMouse(evt) {
        bar.removeClass(opts.activeClass);
        var newPos = A._posSplit+evt[opts.eventPos];
        if ( opts.outline ) {
          zombie.remove(); zombie = null;
          resplit(newPos);
        }
        panes.css("-webkit-user-select", "text");	// let Safari select text again
        $(document)
          .unbind("mousemove", doSplitMouse)
          .unbind("mouseup", endSplitMouse);
      }
      function resplit(newPos) {
        // Constrain new splitbar position to fit pane size limits
        newPos = Math.max(A._min, splitter._DA - B._max,
          Math.min(newPos, A._max, splitter._DA - bar._DA - B._min));
        // Resize/position the two panes
        bar._DA = bar[0][opts.pxSplit];		// bar size may change during dock
        bar.css(opts.origin, newPos).css(opts.fixed, splitter._DF);
        A.css(opts.origin, 0).css(opts.split, newPos).css(opts.fixed,  splitter._DF);
        B.css(opts.origin, newPos+bar._DA)
          .css(opts.split, splitter._DA-bar._DA-newPos).css(opts.fixed,  splitter._DF);
        // IE fires resize for us; all others pay cash
        if ( !$.browser.msie )
          panes.trigger("resize");
      }
      function dimSum(jq, dims) {
        // Opera returns -1 for missing min/max width, turn into 0
        var sum = 0;
        for ( var i=1; i < arguments.length; i++ )
          sum += Math.max(parseInt(jq.css(arguments[i])) || 0, 0);
        return sum;
      }

  // Determine settings based on incoming opts, element classes, and defaults
  var vh = (args.splitHorizontal? 'h' : args.splitVertical? 'v' : args.type) || 'v';
  var opts = $.extend({
    activeClass: 'active',	// class name for active splitter
    pxPerKey: 8,			// splitter px moved per keypress
    tabIndex: 0,			// tab order indicator
    accessKey: ''			// accessKey for splitbar
  },{
    v: {					// Vertical splitters:
      keyLeft: 39, keyRight: 37, cursor: "e-resize",
      splitbarClass: "vsplitbar", outlineClass: "voutline",
      type: 'v', eventPos: "pageX", origin: "left",
      split: "width",  pxSplit: "offsetWidth",  side1: "Left", side2: "Right",
      fixed: "height", pxFixed: "offsetHeight", side3: "Top",  side4: "Bottom"
    },
    h: {					// Horizontal splitters:
      keyTop: 40, keyBottom: 38,  cursor: "n-resize",
      splitbarClass: "hsplitbar", outlineClass: "houtline",
      type: 'h', eventPos: "pageY", origin: "top",
      split: "height", pxSplit: "offsetHeight", side1: "Top",  side2: "Bottom",
      fixed: "width",  pxFixed: "offsetWidth",  side3: "Left", side4: "Right"
    }
  }[vh], args);

  // Create jQuery object closures for splitter and both panes
  var splitter = $(this).css({position: "relative"});
  var panes = $(">*", splitter[0]).css({
    position: "absolute", 			// positioned inside splitter container
    "z-index": "1",					// splitbar is positioned above
    "-moz-outline-style": "none"	// don't show dotted outline
  });
  var A = $(panes[0]);		// left  or top
  var B = $(panes[1]);		// right or bottom

  // Focuser element, provides keyboard support; title is shown by Opera accessKeys
  var focuser = $('<a href="javascript:void(0)"></a>')
    .attr({accessKey: opts.accessKey, tabIndex: opts.tabIndex, title: opts.splitbarClass})
    .bind($.browser.opera?"click":"focus", function(){ this.focus(); bar.addClass(opts.activeClass) })
    .bind("keydown", function(e){
      var key = e.which || e.keyCode;
      var dir = key==opts["key"+opts.side1]? 1 : key==opts["key"+opts.side2]? -1 : 0;
      if ( dir )
        resplit(A[0][opts.pxSplit]+dir*opts.pxPerKey, false);
    })
    .bind("blur", function(){ bar.removeClass(opts.activeClass) });

  // Splitbar element, can be already in the doc or we create one
  var bar = $(panes[2] || '<div></div>')
    .insertAfter(A).css("z-index", "100").append(focuser)
    .attr({"class": opts.splitbarClass, unselectable: "on"})
    .css({position: "absolute",	"user-select": "none", "-webkit-user-select": "none",
      "-khtml-user-select": "none", "-moz-user-select": "none"})
    .bind("mousedown", startSplitMouse);
  // Use our cursor unless the style specifies a non-default cursor
  if ( /^(auto|default|)$/.test(bar.css("cursor")) )
    bar.css("cursor", opts.cursor);

  // Cache several dimensions for speed, rather than re-querying constantly
  bar._DA = bar[0][opts.pxSplit];
  splitter._PBF = $.boxModel? dimSum(splitter, "border"+opts.side3+"Width", "border"+opts.side4+"Width") : 0;
  splitter._PBA = $.boxModel? dimSum(splitter, "border"+opts.side1+"Width", "border"+opts.side2+"Width") : 0;
  A._pane = opts.side1;
  B._pane = opts.side2;
  $.each([A,B], function(){
    this._min = opts["min"+this._pane] || dimSum(this, "min-"+opts.split);
    this._max = opts["max"+this._pane] || dimSum(this, "max-"+opts.split) || 9999;
    this._init = opts["size"+this._pane]===true ?
      parseInt($.curCSS(this[0],opts.split)) : opts["size"+this._pane];
  });

  // Determine initial position, get from cookie if specified
  var initPos = A._init;
  if ( !isNaN(B._init) )	// recalc initial B size as an offset from the top or left side
    initPos = splitter[0][opts.pxSplit] - splitter._PBA - B._init - bar._DA;
  if ( opts.cookie ) {
    if ( !$.cookie )
      alert('jQuery.splitter(): jQuery cookie plugin required');
    var ckpos = parseInt($.cookie(opts.cookie));
    if ( !isNaN(ckpos) )
      initPos = ckpos;
    $(window).bind("unload", function(){
      var state = String(bar.css(opts.origin));	// current location of splitbar
      $.cookie(opts.cookie, state, {expires: opts.cookieExpires || 365,
        path: opts.cookiePath || document.location.pathname});
    });
  }
  if ( isNaN(initPos) )	// King Solomon's algorithm
    initPos = Math.round((splitter[0][opts.pxSplit] - splitter._PBA - bar._DA)/2);

  // Resize event propagation and splitter sizing
  if ( opts.anchorToWindow ) {
    // Account for margin or border on the splitter container and enforce min height
    splitter._hadjust = dimSum(splitter, "borderTopWidth", "borderBottomWidth", "marginBottom");
    splitter._hmin = Math.max(dimSum(splitter, "minHeight"), 20);
    $(window).bind("resize", function(){
      var top = splitter.offset().top;
      var wh = $(window).height();
      splitter.css("height", Math.max(wh-top-splitter._hadjust, splitter._hmin)+"px");
      if ( !$.browser.msie ) splitter.trigger("resize");
    }).trigger("resize");
  }
  else if ( opts.resizeToWidth && !$.browser.msie )
    $(window).bind("resize", function(){
      splitter.trigger("resize");
    });

  // Resize event handler; triggered immediately to set initial position
  splitter.bind("resize", function(e, size){
    // Custom events bubble in jQuery 1.3; don't Yo Dawg
    if ( e.target != this ) return;
    // Determine new width/height of splitter container
    splitter._DF = splitter[0][opts.pxFixed] - splitter._PBF;
    splitter._DA = splitter[0][opts.pxSplit] - splitter._PBA;
    // Bail if splitter isn't visible or content isn't there yet
    if ( splitter._DF <= 0 || splitter._DA <= 0 ) return;
    // Re-divvy the adjustable dimension; maintain size of the preferred pane
    resplit(!isNaN(size)? size : (!(opts.sizeRight||opts.sizeBottom)? A[0][opts.pxSplit] :
      splitter._DA-B[0][opts.pxSplit]-bar._DA));
  }).trigger("resize" , [initPos]);
});
};

})(jQuery);
