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Edit File: theia-sticky-sidebar.js

if (window.jQuery && window.jQuery.fn) {
  /*!
 * Theia Sticky Sidebar v1.7.0
 * https://github.com/WeCodePixels/theia-sticky-sidebar
 *
 * Glues your website's sidebars, making them permanently visible while scrolling.
 *
 * Copyright 2013-2016 WeCodePixels and other contributors
 * Released under the MIT license
 */
;
(function ($) {
    $.fn.theiaStickySidebar = function (options) {
        var defaults = {
            'containerSelector': '',
            'additionalMarginTop': 0,
            'additionalMarginBottom': 0,
            'updateSidebarHeight': true,
            'minWidth': 0,
            'disableOnResponsiveLayouts': true,
            'sidebarBehavior': 'modern',
            'defaultPosition': 'relative',
            'namespace': 'TSS'
        };
        options = $.extend(defaults, options);

// Validate options
        options.additionalMarginTop = parseInt(options.additionalMarginTop) || 0;
        options.additionalMarginBottom = parseInt(options.additionalMarginBottom) || 0;

tryInitOrHookIntoEvents(options, this);

// Try doing init, otherwise hook into window.resize and document.scroll and try again then.
        function tryInitOrHookIntoEvents(options, $that) {
            var success = tryInit(options, $that);

if (!success) {
                console.log('TSS: Body width smaller than options.minWidth. Init is delayed.');

$(document).on('scroll.' + options.namespace, function (options, $that) {
                    return function (evt) {
                        var success = tryInit(options, $that);

if (success) {
                            $(this).unbind(evt);
                        }
                    };
                }(options, $that));
                $(window).on('resize.' + options.namespace, function (options, $that) {
                    return function (evt) {
                        var success = tryInit(options, $that);

if (success) {
                            $(this).unbind(evt);
                        }
                    };
                }(options, $that))
            }
        }

// Try doing init if proper conditions are met.
        function tryInit(options, $that) {
            if (options.initialized === true) {
                return true;
            }

if ($('body').width() < options.minWidth) {
                return false;
            }

init(options, $that);

return true;
        }

// Init the sticky sidebar(s).
        function init(options, $that) {
            options.initialized = true;

// Add CSS
            var existingStylesheet = $('#theia-sticky-sidebar-stylesheet-' + options.namespace);
            if (existingStylesheet.length === 0) {
                $('head').append($('<style id="theia-sticky-sidebar-stylesheet-' + options.namespace + '">.theiaStickySidebar:after {content: ""; display: table; clear: both;}</style>'));
            }

$that.each(function () {
                var o = {};

o.sidebar = $(this);

// Save options
                o.options = options || {};

// Get container
                o.container = $(o.options.containerSelector);
                if (o.container.length == 0) {
                    o.container = o.sidebar.parent();
                }

// Create sticky sidebar
                o.sidebar.parents().css('-webkit-transform', 'none'); // Fix for WebKit bug - https://code.google.com/p/chromium/issues/detail?id=20574
                o.sidebar.css({
                    'position': o.options.defaultPosition,
                    'overflow': 'visible',
                    // The "box-sizing" must be set to "content-box" because we set a fixed height to this element when the sticky sidebar has a fixed position.
                    '-webkit-box-sizing': 'border-box',
                    '-moz-box-sizing': 'border-box',
                    'box-sizing': 'border-box'
                });

// Get the sticky sidebar element. If none has been found, then create one.
                o.stickySidebar = o.sidebar.find('.theiaStickySidebar');
                if (o.stickySidebar.length == 0) {
                    // Remove <script> tags, otherwise they will be run again when added to the stickySidebar.
                    var javaScriptMIMETypes = /(?:text|application)\/(?:x-)?(?:javascript|ecmascript)/i;
                    o.sidebar.find('script').filter(function (index, script) {
                        return script.type.length === 0 || script.type.match(javaScriptMIMETypes);
                    }).remove();

o.stickySidebar = $('<div>').addClass('theiaStickySidebar').append(o.sidebar.children());
                    o.sidebar.append(o.stickySidebar);
                }

// Get existing top and bottom margins and paddings
                o.marginBottom = parseInt(o.sidebar.css('margin-bottom'));
                o.paddingTop = parseInt(o.sidebar.css('padding-top'));
                o.paddingBottom = parseInt(o.sidebar.css('padding-bottom'));

// Add a temporary padding rule to check for collapsable margins.
                var collapsedTopHeight = o.stickySidebar.offset().top;
                var collapsedBottomHeight = o.stickySidebar.outerHeight();
                o.stickySidebar.css('padding-top', 1);
                o.stickySidebar.css('padding-bottom', 1);
                collapsedTopHeight -= o.stickySidebar.offset().top;
                collapsedBottomHeight = o.stickySidebar.outerHeight() - collapsedBottomHeight - collapsedTopHeight;
                if (collapsedTopHeight == 0) {
                    o.stickySidebar.css('padding-top', 0);
                    o.stickySidebarPaddingTop = 0;
                }
                else {
                    o.stickySidebarPaddingTop = 1;
                }

if (collapsedBottomHeight == 0) {
                    o.stickySidebar.css('padding-bottom', 0);
                    o.stickySidebarPaddingBottom = 0;
                }
                else {
                    o.stickySidebarPaddingBottom = 1;
                }

// We use this to know whether the user is scrolling up or down.
                o.previousScrollTop = null;

// Scroll top (value) when the sidebar has fixed position.
                o.fixedScrollTop = 0;

// Set sidebar to default values.
                resetSidebar();

o.onScroll = function (o) {
                    // Stop if the sidebar isn't visible.
                    if (!o.stickySidebar.is(":visible")) {
                        return;
                    }

// Stop if the window is too small.
                    if ($('body').width() < o.options.minWidth) {
                        resetSidebar();
                        return;
                    }

// Stop if the sidebar width is larger than the container width (e.g. the theme is responsive and the sidebar is now below the content)
                    if (o.options.disableOnResponsiveLayouts) {
                        var sidebarWidth = o.sidebar.outerWidth(o.sidebar.css('float') == 'none');

if (sidebarWidth + 50 > o.container.width()) {
                            resetSidebar();
                            return;
                        }
                    }

var scrollTop = $(document).scrollTop();
                    var position = 'static';

// If the user has scrolled down enough for the sidebar to be clipped at the top, then we can consider changing its position.
                    if (scrollTop >= o.sidebar.offset().top + (o.paddingTop - o.options.additionalMarginTop)) {
                        // The top and bottom offsets, used in various calculations.
                        var offsetTop = o.paddingTop + options.additionalMarginTop;
                        var offsetBottom = o.paddingBottom + o.marginBottom + options.additionalMarginBottom;

// All top and bottom positions are relative to the window, not to the parent elemnts.
                        var containerTop = o.sidebar.offset().top;
                        var containerBottom = o.sidebar.offset().top + getClearedHeight(o.container);

// The top and bottom offsets relative to the window screen top (zero) and bottom (window height).
                        var windowOffsetTop = 0 + options.additionalMarginTop;
                        var windowOffsetBottom;

var sidebarSmallerThanWindow = (o.stickySidebar.outerHeight() + offsetTop + offsetBottom) < $(window).height();
                        if (sidebarSmallerThanWindow) {
                            windowOffsetBottom = windowOffsetTop + o.stickySidebar.outerHeight();
                        }
                        else {
                            windowOffsetBottom = $(window).height() - o.marginBottom - o.paddingBottom - options.additionalMarginBottom;
                        }

var staticLimitTop = containerTop - scrollTop + o.paddingTop;
                        var staticLimitBottom = containerBottom - scrollTop - o.paddingBottom - o.marginBottom;

var top = o.stickySidebar.offset().top - scrollTop;
                        var scrollTopDiff = o.previousScrollTop - scrollTop;

// If the sidebar position is fixed, then it won't move up or down by itself. So, we manually adjust the top coordinate.
                        if (o.stickySidebar.css('position') == 'fixed') {
                            if (o.options.sidebarBehavior == 'modern') {
                                top += scrollTopDiff;
                            }
                        }

if (o.options.sidebarBehavior == 'stick-to-top') {
                            top = options.additionalMarginTop;
                        }

if (o.options.sidebarBehavior == 'stick-to-bottom') {
                            top = windowOffsetBottom - o.stickySidebar.outerHeight();
                        }

if (scrollTopDiff > 0) { // If the user is scrolling up.
                            top = Math.min(top, windowOffsetTop);
                        }
                        else { // If the user is scrolling down.
                            top = Math.max(top, windowOffsetBottom - o.stickySidebar.outerHeight());
                        }

top = Math.max(top, staticLimitTop);

top = Math.min(top, staticLimitBottom - o.stickySidebar.outerHeight());

// If the sidebar is the same height as the container, we won't use fixed positioning.
                        var sidebarSameHeightAsContainer = o.container.height() == o.stickySidebar.outerHeight();

if (!sidebarSameHeightAsContainer && top == windowOffsetTop) {
                            position = 'fixed';
                        }
                        else if (!sidebarSameHeightAsContainer && top == windowOffsetBottom - o.stickySidebar.outerHeight()) {
                            position = 'fixed';
                        }
                        else if (scrollTop + top - o.sidebar.offset().top - o.paddingTop <= options.additionalMarginTop) {
                            // Stuck to the top of the page. No special behavior.
                            position = 'static';
                        }
                        else {
                            // Stuck to the bottom of the page.
                            position = 'absolute';
                        }
                    }

/*
                     * Performance notice: It's OK to set these CSS values at each resize/scroll, even if they don't change.
                     * It's way slower to first check if the values have changed.
                     */
                    if (position == 'fixed') {
                        var scrollLeft = $(document).scrollLeft();

o.stickySidebar.css({
                            'position': 'fixed',
                            'width': getWidthForObject(o.stickySidebar) + 'px',
                            'transform': 'translateY(' + top + 'px)',
                            'left': (o.sidebar.offset().left + parseInt(o.sidebar.css('padding-left')) - scrollLeft) + 'px',
                            'top': '0px'
                        });
                    }
                    else if (position == 'absolute') {
                        var css = {};

if (o.stickySidebar.css('position') != 'absolute') {
                            css.position = 'absolute';
                            css.transform = 'translateY(' + (scrollTop + top - o.sidebar.offset().top - o.stickySidebarPaddingTop - o.stickySidebarPaddingBottom) + 'px)';
                            css.top = '0px';
                        }

css.width = getWidthForObject(o.stickySidebar) + 'px';
                        css.left = '';

o.stickySidebar.css(css);
                    }
                    else if (position == 'static') {
                        resetSidebar();
                    }

if (position != 'static') {
                        if (o.options.updateSidebarHeight == true) {
                            o.sidebar.css({
                                'min-height': o.stickySidebar.outerHeight() + o.stickySidebar.offset().top - o.sidebar.offset().top + o.paddingBottom
                            });
                        }
                    }

o.previousScrollTop = scrollTop;
                };

// Initialize the sidebar's position.
                o.onScroll(o);

// Recalculate the sidebar's position on every scroll and resize.
                $(document).on('scroll.' + o.options.namespace, function (o) {
                    return function () {
                        o.onScroll(o);
                    };
                }(o));
                $(window).on('resize.' + o.options.namespace, function (o) {
                    return function () {
                        o.stickySidebar.css({'position': 'static'});
                        o.onScroll(o);
                    };
                }(o));

// Recalculate the sidebar's position every time the sidebar changes its size.
                if (typeof ResizeSensor !== 'undefined') {
                    new ResizeSensor(o.stickySidebar[0], function (o) {
                        return function () {
                            o.onScroll(o);
                        };
                    }(o));
                }

// Reset the sidebar to its default state
                function resetSidebar() {
                    o.fixedScrollTop = 0;
                    o.sidebar.css({
                        'min-height': '1px'
                    });
                    o.stickySidebar.css({
                        'position': 'static',
                        'width': '',
                        'transform': 'none'
                    });
                }

// Get the height of a div as if its floated children were cleared. Note that this function fails if the floats are more than one level deep.
                function getClearedHeight(e) {
                    var height = e.height();

e.children().each(function () {
                        height = Math.max(height, $(this).height());
                    });

return height;
                }
            });
        }

function getWidthForObject(object) {
            var width;

try {
                width = object[0].getBoundingClientRect().width;
            }
            catch (err) {
            }

if (typeof width === "undefined") {
                width = object.width();
            }

return width;
        }

return this;
    }
})(jQuery);
}