/*
 * 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");

                 splitter.trigger("RightPaneResized");
             }
             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);