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-rw-r--r--public/vendor/jquery-scrollspy.js267
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diff --git a/public/vendor/jquery-scrollspy.js b/public/vendor/jquery-scrollspy.js
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-/*
- * jQuery ScrollSpy Plugin
- * Author: @sxalexander, softwarespot
- * Licensed under the MIT license
- */
-(function jQueryScrollspy(window, $) {
- // Plugin Logic
-
- $.fn.extend({
- scrollspy: function scrollspy(options, action) {
- // If the options parameter is a string, then assume it's an 'action', therefore swap the parameters around
- if (_isString(options)) {
- var tempOptions = action;
-
- // Set the action as the option parameter
- action = options;
-
- // Set to be the reference action pointed to
- options = tempOptions;
- }
-
- // override the default options with those passed to the plugin
- options = $.extend({}, _defaults, options);
-
- // sanitize the following option with the default value if the predicate fails
- _sanitizeOption(options, _defaults, 'container', _isObject);
-
- // cache the jQuery object
- var $container = $(options.container);
-
- // check if it's a valid jQuery selector
- if ($container.length === 0) {
- return this;
- }
-
- // sanitize the following option with the default value if the predicate fails
- _sanitizeOption(options, _defaults, 'namespace', _isString);
-
- // check if the action is set to DESTROY/destroy
- if (_isString(action) && action.toUpperCase() === 'DESTROY') {
- $container.off('scroll.' + options.namespace);
- return this;
- }
-
- // sanitize the following options with the default values if the predicates fails
- _sanitizeOption(options, _defaults, 'buffer', $.isNumeric);
- _sanitizeOption(options, _defaults, 'max', $.isNumeric);
- _sanitizeOption(options, _defaults, 'min', $.isNumeric);
-
- // callbacks
- _sanitizeOption(options, _defaults, 'onEnter', $.isFunction);
- _sanitizeOption(options, _defaults, 'onLeave', $.isFunction);
- _sanitizeOption(options, _defaults, 'onLeaveTop', $.isFunction);
- _sanitizeOption(options, _defaults, 'onLeaveBottom', $.isFunction);
- _sanitizeOption(options, _defaults, 'onTick', $.isFunction);
-
- if ($.isFunction(options.max)) {
- options.max = options.max();
- }
-
- if ($.isFunction(options.min)) {
- options.min = options.min();
- }
-
- // check if the mode is set to VERTICAL/vertical
- var isVertical = window.String(options.mode).toUpperCase() === 'VERTICAL';
-
- return this.each(function each() {
- // cache this
- var _this = this;
-
- // cache the jQuery object
- var $element = $(_this);
-
- // count the number of times a container is entered
- var enters = 0;
-
- // determine if the scroll is with inside the container
- var inside = false;
-
- // count the number of times a container is left
- var leaves = 0;
-
- // create a scroll listener for the container
- $container.on('scroll.' + options.namespace, function onScroll() {
- // cache the jQuery object
- var $this = $(this);
-
- // create a position object literal
- var position = {
- top: $this.scrollTop(),
- left: $this.scrollLeft(),
- };
-
- var containerHeight = $container.height();
-
- var max = options.max;
-
- var min = options.min;
-
- var xAndY = isVertical ? position.top + options.buffer : position.left + options.buffer;
-
- if (max === 0) {
- // get the maximum value based on either the height or the outer width
- max = isVertical ? containerHeight : $container.outerWidth() + $element.outerWidth();
- }
-
- // if we have reached the minimum bound, though are below the max
- if (xAndY >= min && xAndY <= max) {
- // trigger the 'scrollEnter' event
- if (!inside) {
- inside = true;
- enters++;
-
- // trigger the 'scrollEnter' event
- $element.trigger('scrollEnter', {
- position: position,
- });
-
- // call the 'onEnter' function
- if (options.onEnter !== null) {
- options.onEnter(_this, position);
- }
- }
-
- // trigger the 'scrollTick' event
- $element.trigger('scrollTick', {
- position: position,
- inside: inside,
- enters: enters,
- leaves: leaves,
- });
-
- // call the 'onTick' function
- if (options.onTick !== null) {
- options.onTick(_this, position, inside, enters, leaves);
- }
- } else {
- if (inside) {
- inside = false;
- leaves++;
-
- // trigger the 'scrollLeave' event
- $element.trigger('scrollLeave', {
- position: position,
- leaves: leaves,
- });
-
- // call the 'onLeave' function
- if (options.onLeave !== null) {
- options.onLeave(_this, position);
- }
-
- if (xAndY <= min) {
- // trigger the 'scrollLeaveTop' event
- $element.trigger('scrollLeaveTop', {
- position: position,
- leaves: leaves,
- });
-
- // call the 'onLeaveTop' function
- if (options.onLeaveTop !== null) {
- options.onLeaveTop(_this, position);
- }
- } else if (xAndY >= max) {
- // trigger the 'scrollLeaveBottom' event
- $element.trigger('scrollLeaveBottom', {
- position: position,
- leaves: leaves,
- });
-
- // call the 'onLeaveBottom' function
- if (options.onLeaveBottom !== null) {
- options.onLeaveBottom(_this, position);
- }
- }
- } else {
- // Idea taken from: http://stackoverflow.com/questions/5353934/check-if-element-is-visible-on-screen
- var containerScrollTop = $container.scrollTop();
-
- // Get the element height
- var elementHeight = $element.height();
-
- // Get the element offset
- var elementOffsetTop = $element.offset().top;
-
- if ((elementOffsetTop < (containerHeight + containerScrollTop)) && (elementOffsetTop > (containerScrollTop - elementHeight))) {
- // trigger the 'scrollView' event
- $element.trigger('scrollView', {
- position: position,
- });
-
- // call the 'onView' function
- if (options.onView !== null) {
- options.onView(_this, position);
- }
- }
- }
- }
- });
- });
- },
- });
-
- // Fields (Private)
-
- // Defaults
-
- // default options
- var _defaults = {
- // the offset to be applied to the left and top positions of the container
- buffer: 0,
-
- // the element to apply the 'scrolling' event to (default window)
- container: window,
-
- // the maximum value of the X or Y coordinate, depending on mode the selected
- max: 0,
-
- // the maximum value of the X or Y coordinate, depending on mode the selected
- min: 0,
-
- // whether to listen to the X (horizontal) or Y (vertical) scrolling
- mode: 'vertical',
-
- // namespace to append to the 'scroll' event
- namespace: 'scrollspy',
-
- // call the following callback function every time the user enters the min / max zone
- onEnter: null,
-
- // call the following callback function every time the user leaves the min / max zone
- onLeave: null,
-
- // call the following callback function every time the user leaves the top zone
- onLeaveTop: null,
-
- // call the following callback function every time the user leaves the bottom zone
- onLeaveBottom: null,
-
- // call the following callback function on each scroll event within the min and max parameters
- onTick: null,
-
- // call the following callback function on each scroll event when the element is inside the viewable view port
- onView: null,
- };
-
- // Methods (Private)
-
- // check if a value is an object datatype
- function _isObject(value) {
- return $.type(value) === 'object';
- }
-
- // check if a value is a string datatype with a length greater than zero when whitespace is stripped
- function _isString(value) {
- return $.type(value) === 'string' && $.trim(value).length > 0;
- }
-
- // check if an option is correctly formatted using a predicate; otherwise, return the default value
- function _sanitizeOption(options, defaults, property, predicate) {
- // set the property to the default value if the predicate returned false
- if (!predicate(options[property])) {
- options[property] = defaults[property];
- }
- }
-}(window, window.jQuery));
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