/*! jQuery Splitter - v2.0.1 - 2014-03-22
 * http://jquery.com
 * Includes: splitter.js
 * Copyright 2014 Dave Methvin and other contributors
 * Licensed MIT, GPL
 */


/**
 * jQuery.splitter.js - two-pane splitter window plugin
 *
 * forked version at https://github.com/GerHobbelt/splitter
 *
 * 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 $('#MySplitter').splitter({type: 'h', accessKey: 'M'});
 * @desc Create a horizontal splitter resizable via Alt+Shift+M
 *
 * @name splitter
 * @type jQuery
 * @param Object options Options for the splitter (not required)
 * @cat Plugins/Splitter
 * @return jQuery
 * @author Dave Methvin (dave.methvin@gmail.com)
 */
(function ($) {

    var browserDetect = (function () {
      var N = navigator.appName,
        ua = navigator.userAgent,
        tem,
        M = ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);
      if (M && (tem = ua.match(/version\/([\.\d]+)/i)) != null) {
        M[2] = tem[1];
      }
      M = M ? [M[1], M[2]] : [N, navigator.appVersion, '-?'];
      return M;
    })();

    // var resizeAutoFired = (document.documentMode && document.documentMode < 9);
    // var isOpera = (window.opera && typeof window.opera.version === 'function');

    function resize_auto_fired() {
      // Returns true when the browser natively fires the resize
      // event attached to the panes elements
      return browserDetect[0] === 'msie' && parseInt(browserDetect[1]) < 9;
    }


    var splitterCounter = 0;

    $.fn.splitter = function(args) {
        args = args || {};
        return this.each(function() {
            //if ( $(this).is('.splitter') ) return;    // already a splitter
            if ($(this).attr('data-splitter-initialized')) {
                return;
            }
            var zombie; // left-behind splitbar for outline resizes

            function setBarState(state) {
                bar
                .removeClass(opts.barStateClasses)
                .addClass(state);
            }

            function startSplitMouse(evt) {
                if (evt.which !== 1) {
                    return; // left button only
                }
                bar.removeClass(opts.barHoverClass);
                if (opts.outline) {
                    zombie = zombie || bar.clone(false).insertAfter(A);
                    bar.removeClass(opts.barDockedClass);
                }
                setBarState(opts.barActiveClass);
                // Safari selects A/B text on a move; iframes capture mouse events so hide them
                panes
                .css({
                    'user-select': 'none',
                    '-webkit-user-select': 'none',
                    '-khtml-user-select': 'none',
                    '-moz-user-select': 'none',
                    'pointer-events': 'none'
                })
                .find('iframe')
                .addClass(opts.iframeClass);

                A._posSplit = A[0][opts.pxSplit] - evt[opts.eventPos];
                $(document)
                .bind('mousemove' + opts.eventNamespace, doSplitMouse)
                .bind('mouseup' + opts.eventNamespace, endSplitMouse);
            }

            function doSplitMouse(evt) {
                var pos = A._posSplit + evt[opts.eventPos],
                    range = Math.max(0, Math.min(pos, splitter._DA - bar._DA)),
                    limit = Math.max(A._min, splitter._DA - B._max,
                              Math.min(pos, A._max, splitter._DA - bar._DA - B._min));
                if (opts.outline) {
                    // Let docking splitbar be dragged to the dock position, even if min width applies
                    if ((opts.dockPane === A && pos < Math.max(A._min, bar._DA)) ||
                        (opts.dockPane === B && pos > Math.min(pos, A._max, splitter._DA - bar._DA - B._min))) {
                        bar
                        .addClass(opts.barDockedClass)
                        .css(opts.origin, range);
                    } else {
                        bar
                        .removeClass(opts.barDockedClass)
                        .css(opts.origin, limit);
                    }
                    bar._DA = bar[0][opts.pxSplit];
                } else {
                    resplit(pos);
                }
                setBarState(pos === limit ? opts.barActiveClass : opts.barLimitClass);
            }

            function endSplitMouse(evt) {
                setBarState(opts.barNormalClass);
                bar.addClass(opts.barHoverClass);
                var pos = A._posSplit + evt[opts.eventPos];
                if (opts.outline) {
                    if (zombie) {
                      zombie.remove();
                    }
                    zombie = null;
                    resplit(pos);
                }
                panes
                .css({
                    'user-select': 'text',
                    '-webkit-user-select': 'text',
                    '-khtml-user-select': 'text',
                    '-moz-user-select': 'text',
                    'pointer-events': 'auto'
                })
                .find('iframe')
                .removeClass(opts.iframeClass);
                $(document)
                .unbind('mousemove' + opts.eventNamespace + ' mouseup' + opts.eventNamespace);
            }

            function resplit(pos) {
                bar._DA = bar[0][opts.pxSplit]; // bar size may change during dock
                // Constrain new splitbar position to fit pane size and docking limits
                if ((opts.dockPane === A && pos < Math.max(A._min, bar._DA)) ||
                    (opts.dockPane === B && pos > Math.min(pos, A._max, splitter._DA - bar._DA - B._min))) {
                    bar.addClass(opts.barDockedClass);
                    bar._DA = bar[0][opts.pxSplit];
                    pos = opts.dockPane === A ? 0 : splitter._DA - bar._DA;
                    if (bar._pos === null) {
                        bar._pos = A[0][opts.pxSplit];
                    }
                } else {
                    bar.removeClass(opts.barDockedClass);
                    bar._DA = bar[0][opts.pxSplit];
                    bar._pos = null;
                    pos = Math.max(A._min, splitter._DA - B._max,
                            Math.min(pos, A._max, splitter._DA - bar._DA - B._min));
                }
                // Resize/position the two panes
                bar
                .css(opts.origin, pos)
                .css(opts.fixed, splitter._DF);
                A
                .css(opts.origin, 0)
                .css(opts.split, pos)
                .css(opts.fixed, splitter._DF);
                B
                .css(opts.origin, pos + bar._DA)
                .css(opts.split, splitter._DA - bar._DA - pos)
                .css(opts.fixed, splitter._DF);
                // IE fires resize for us; all others pay cash
                if (!resize_auto_fired()) {
                    panes.triggerHandler('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]), 10) || 0, 0);
                }
                return sum;
            }

            function resize(size) {
                // 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;
                }

                // if nothing changed, no need to resize
                if (splitter._oldW === splitter.width() && splitter._oldH === splitter.height()) {
                    return; // nothing changed
                }
                splitter._oldW = splitter.width();
                splitter._oldH = splitter.height();

                // 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));
                setBarState(opts.barNormalClass);
            }

            // Determine settings based on incoming opts, element classes, and defaults
            var vh = (args.splitHorizontal ? 'h' : args.splitVertical ? 'v' : args.type) || 'v';
            var opts = $.extend({
                // Defaults here allow easy use with ThemeRoller
                splitterClass: 'splitter ui-widget ui-widget-content',
                paneClass: 'splitter-pane',
                barClass: 'splitter-bar',
                barNormalClass: 'ui-state-default', // splitbar normal
                barHoverClass: 'ui-state-hover', // splitbar mouse hover
                barActiveClass: 'ui-state-highlight', // splitbar being moved
                barLimitClass: 'ui-state-error', // splitbar at limit
                iframeClass: 'splitter-iframe-hide', // hide iframes during split
                eventNamespace: '.splitter' + (++splitterCounter),
                pxPerKey: 8, // splitter px moved per keypress
                tabIndex: 0, // tab order indicator
                accessKey: '', // accessKey for splitbar
                dockSpeed: 1,
                undockSpeed: 1,
                dockEase: null,
                undockEase: null
            }, {
                // user can override
                v: { // Vertical splitters:
                    keyLeft: 39,
                    keyRight: 37,
                    cursor: 'e-resize',
                    barStateClass: 'splitter-bar-vertical',
                    barDockedClass: 'splitter-bar-vertical-docked'
                },
                h: { // Horizontal splitters:
                    keyTop: 40,
                    keyBottom: 38,
                    cursor: 'n-resize',
                    barStateClass: 'splitter-bar-horizontal',
                    barDockedClass: 'splitter-bar-horizontal-docked'
                }
            }[vh], args, {
                // user cannot override
                v: { // Vertical splitters:
                    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:
                    type: 'h',
                    eventPos: 'pageY',
                    origin: 'top',
                    split: 'height',
                    pxSplit: 'offsetHeight',
                    side1: 'Top',
                    side2: 'Bottom',
                    fixed: 'width',
                    pxFixed: 'offsetWidth',
                    side3: 'Left',
                    side4: 'Right'
                }
            }[vh]);
            opts.barStateClasses = [opts.barNormalClass, opts.barHoverClass, opts.barActiveClass, opts.barLimitClass].join(' ');

            // Create jQuery object closures for splitter and both panes
            var splitter = $(this).css({
                position: 'relative'
            }).addClass(opts.splitterClass).attr('data-splitter-initialized', true);
            var panes = $('>*', splitter[0]).addClass(opts.paneClass).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]),
                B = $(panes[1]); // A = left/top, B = right/bottom
            opts.dockPane = opts.dock && (/right|bottom/.test(opts.dock) ? B : A);

            // Focuser element, provides keyboard support; title is shown by Opera accessKeys
            var focuser = $('<a />')
                .attr({
                    accessKey: opts.accessKey,
                    tabIndex: opts.tabIndex,
                    title: opts.splitbarClass
                })
                .bind((browserDetect === 'opera' ? 'click' : 'focus') + opts.eventNamespace, function() {
                    this.focus();
                    bar.addClass(opts.barActiveClass);
                })
                .bind('blur' + opts.eventNamespace, function() {
                    bar.removeClass(opts.barActiveClass);
                });
            
            if (opts.accessKey !== '') {
                focuser.bind('keydown' + opts.eventNamespace, 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);
                    }
                });
            }

            // Splitbar element
            var bar = $('<div />')
                .insertAfter(A)
                .addClass(opts.barClass)
                .addClass(opts.barStateClass)
                .append(focuser).attr({
                    unselectable: 'on'
                })
                .css({
                    position: 'absolute',
                    'user-select': 'none',
                    '-webkit-user-select': 'none',
                    '-khtml-user-select': 'none',
                    '-moz-user-select': 'none',
                    'z-index': '100'
                })
                .bind('mousedown' + opts.eventNamespace, startSplitMouse)
                .bind('mouseover' + opts.eventNamespace, function() {
                    $(this).addClass(opts.barHoverClass);
                })
                .bind('mouseout' + opts.eventNamespace, function() {
                    $(this).removeClass(opts.barHoverClass);
                });
            // Use our cursor unless the style specifies a non-default cursor
            if (/^(auto|default|)$/.test(bar.css('cursor'))) {
                bar.css('cursor', opts.cursor);
            }

            // Cache several dimensions for speed, rather than re-querying constantly
            // These are saved on the A/B/bar/splitter jQuery vars, which are themselves cached
            // DA=dimension adjustable direction, PBF=padding/border fixed, PBA=padding/border adjustable
            bar._DA = bar[0][opts.pxSplit];
            splitter._PBF = dimSum(splitter, 'border' + opts.side3 + 'Width', 'border' + opts.side4 + 'Width');
            splitter._PBA = dimSum(splitter, 'border' + opts.side1 + 'Width', 'border' + opts.side2 + 'Width');
            A._pane = opts.side1;
            B._pane = opts.side2;
            $.each([A, B], function() {
                //noinspection JSPotentiallyInvalidUsageOfThis
                this._splitter_style = this.style;
                //noinspection JSPotentiallyInvalidUsageOfThis
                this._min = opts['min' + this._pane] || dimSum(this, 'min-' + opts.split);
                //noinspection JSPotentiallyInvalidUsageOfThis
                this._max = opts['max' + this._pane] || dimSum(this, 'max-' + opts.split) || 9999;
                //noinspection JSPotentiallyInvalidUsageOfThis
                this._init = opts['size' + this._pane] === true ?
                             parseInt($.css(this[0], opts.split), 10) :
                             opts['size' + this._pane];
            });

            // Determine initial position
            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 (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) {
                opts.resizeTo = window;
            }
            if (opts.resizeTo) {
                splitter._hadjust = dimSum(splitter, 'borderTopWidth', 'borderBottomWidth', 'marginBottom');
                splitter._hmin = Math.max(dimSum(splitter, 'minHeight'), 20);
                $(window).bind('resize' + opts.eventNamespace, function() {
                    var top = splitter.offset().top;
                    var eh = $(opts.resizeTo).height();

                    splitter.css('height', Math.max(eh - top - splitter._hadjust, splitter._hmin) + 'px');

                    if (!resize_auto_fired()) {
                        splitter.triggerHandler('resize');
                    }
                }).triggerHandler('resize');
            } else if (opts.resizeToWidth && !resize_auto_fired()) {
                $(window).bind('resize' + opts.eventNamespace, function() {
                    // splitter.triggerHandler('resize');
                    resize();
                });
            }

            // Docking support
            if (opts.dock) {
                splitter
                .bind('toggleDock' + opts.eventNamespace, function() {
                    var pw = opts.dockPane[0][opts.pxSplit];
                    splitter.triggerHandler(pw ? 'dock' : 'undock');
                })
                .bind('dock' + opts.eventNamespace, function() {
                    var pw = A[0][opts.pxSplit];
                    if (!pw) { return; }
                    bar._pos = pw;
                    var x = {};
                    x[opts.origin] = opts.dockPane === A ? 0 :
                        splitter[0][opts.pxSplit] - splitter._PBA - bar[0][opts.pxSplit];
                    bar.animate(x, opts.dockSpeed || 1, opts.dockEasing, function() {
                        bar.addClass(opts.barDockedClass);
                        resplit(x[opts.origin]);
                    });
                })
                .bind('undock' + opts.eventNamespace, function() {
                    var pw = opts.dockPane[0][opts.pxSplit];
                    if (pw) { return; }
                    var x = {};

                    x[opts.origin] = bar._pos + 'px';
                    bar
                    .removeClass(opts.barDockedClass)
                    .animate(x, opts.undockSpeed || opts.dockSpeed || 1, opts.undockEasing || opts.dockEasing, function() {
                        resplit(bar._pos);
                        bar._pos = null;
                    });
                });

                if (opts.dockKey) {
                    $('<a title="' + opts.splitbarClass + ' toggle dock"></a>')
                    .attr({
                        accessKey: opts.dockKey,
                        tabIndex: -1
                    })
                    .appendTo(bar)
                    .bind((browserDetect === 'opera' ? 'click' : 'focus'), function () {
                        splitter.triggerHandler('toggleDock');
                        this.blur();
                    });
                }

                bar.bind('dblclick', function() {
                    splitter.triggerHandler('toggleDock');
                });
            }

            // Resize event handler; triggered immediately to set initial position
            splitter
            .bind('destroy' + opts.eventNamespace, function() {
                $([window, document]).unbind(opts.eventNamespace);
                bar.unbind().remove();
                panes.removeClass(opts.paneClass);
                splitter
                .removeClass(opts.splitterClass)
                .add(panes)
                .unbind(opts.eventNamespace)
                .attr('style', function() {
                    //noinspection JSPotentiallyInvalidUsageOfThis
                    return this._splitter_style || '';
                });
                splitter = bar = focuser = panes = A = B = opts = args = null;
            })
            .bind('resize' + opts.eventNamespace, function(e, size) {
                resize(size);
            })
            .triggerHandler('resize', [initPos]);
        });
    };

})(jQuery);
