mirror of https://github.com/twbs/bootstrap.git
337 lines
10 KiB
JavaScript
337 lines
10 KiB
JavaScript
(function (global, factory) {
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if (typeof define === 'function' && define.amd) {
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define(['exports', 'module', './util'], factory);
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} else if (typeof exports !== 'undefined' && typeof module !== 'undefined') {
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factory(exports, module, require('./util'));
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} else {
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var mod = {
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exports: {}
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};
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factory(mod.exports, mod, global.Util);
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global.scrollspy = mod.exports;
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}
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})(this, function (exports, module, _util) {
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'use strict';
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var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }
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var _Util = _interopRequireDefault(_util);
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/**
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* --------------------------------------------------------------------------
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* Bootstrap (v4.0.0): scrollspy.js
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* Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
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* --------------------------------------------------------------------------
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*/
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var ScrollSpy = (function ($) {
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/**
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* ------------------------------------------------------------------------
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* Constants
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* ------------------------------------------------------------------------
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*/
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var NAME = 'scrollspy';
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var VERSION = '4.0.0';
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var DATA_KEY = 'bs.scrollspy';
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var EVENT_KEY = '.' + DATA_KEY;
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var DATA_API_KEY = '.data-api';
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var JQUERY_NO_CONFLICT = $.fn[NAME];
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var Default = {
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offset: 10,
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method: 'auto',
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target: ''
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};
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var DefaultType = {
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offset: 'number',
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method: 'string',
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target: '(string|element)'
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};
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var Event = {
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ACTIVATE: 'activate' + EVENT_KEY,
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SCROLL: 'scroll' + EVENT_KEY,
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LOAD_DATA_API: 'load' + EVENT_KEY + DATA_API_KEY
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};
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var ClassName = {
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DROPDOWN_ITEM: 'dropdown-item',
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DROPDOWN_MENU: 'dropdown-menu',
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NAV_LINK: 'nav-link',
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NAV: 'nav',
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ACTIVE: 'active'
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};
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var Selector = {
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DATA_SPY: '[data-spy="scroll"]',
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ACTIVE: '.active',
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LIST_ITEM: '.list-item',
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LI: 'li',
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LI_DROPDOWN: 'li.dropdown',
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NAV_LINKS: '.nav-link',
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DROPDOWN: '.dropdown',
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DROPDOWN_ITEMS: '.dropdown-item',
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DROPDOWN_TOGGLE: '.dropdown-toggle'
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};
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var OffsetMethod = {
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OFFSET: 'offset',
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POSITION: 'position'
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};
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/**
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* ------------------------------------------------------------------------
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* Class Definition
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* ------------------------------------------------------------------------
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*/
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var ScrollSpy = (function () {
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function ScrollSpy(element, config) {
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_classCallCheck(this, ScrollSpy);
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this._element = element;
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this._scrollElement = element.tagName === 'BODY' ? window : element;
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this._config = this._getConfig(config);
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this._selector = this._config.target + ' ' + Selector.NAV_LINKS + ',' + (this._config.target + ' ' + Selector.DROPDOWN_ITEMS);
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this._offsets = [];
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this._targets = [];
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this._activeTarget = null;
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this._scrollHeight = 0;
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$(this._scrollElement).on(Event.SCROLL, $.proxy(this._process, this));
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this.refresh();
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this._process();
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}
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/**
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* ------------------------------------------------------------------------
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* Data Api implementation
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* ------------------------------------------------------------------------
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*/
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// getters
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_createClass(ScrollSpy, [{
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key: 'refresh',
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// public
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value: function refresh() {
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var _this = this;
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var autoMethod = this._scrollElement !== this._scrollElement.window ? OffsetMethod.POSITION : OffsetMethod.OFFSET;
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var offsetMethod = this._config.method === 'auto' ? autoMethod : this._config.method;
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var offsetBase = offsetMethod === OffsetMethod.POSITION ? this._getScrollTop() : 0;
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this._offsets = [];
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this._targets = [];
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this._scrollHeight = this._getScrollHeight();
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var targets = $.makeArray($(this._selector));
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targets.map(function (element) {
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var target = undefined;
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var targetSelector = _Util['default'].getSelectorFromElement(element);
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if (targetSelector) {
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target = $(targetSelector)[0];
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}
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if (target && (target.offsetWidth || target.offsetHeight)) {
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// todo (fat): remove sketch reliance on jQuery position/offset
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return [$(target)[offsetMethod]().top + offsetBase, targetSelector];
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}
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}).filter(function (item) {
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return item;
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}).sort(function (a, b) {
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return a[0] - b[0];
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}).forEach(function (item) {
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_this._offsets.push(item[0]);
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_this._targets.push(item[1]);
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});
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}
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}, {
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key: 'dispose',
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value: function dispose() {
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$.removeData(this._element, DATA_KEY);
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$(this._scrollElement).off(EVENT_KEY);
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this._element = null;
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this._scrollElement = null;
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this._config = null;
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this._selector = null;
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this._offsets = null;
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this._targets = null;
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this._activeTarget = null;
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this._scrollHeight = null;
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}
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// private
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}, {
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key: '_getConfig',
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value: function _getConfig(config) {
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config = $.extend({}, Default, config);
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if (typeof config.target !== 'string') {
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var id = $(config.target).attr('id');
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if (!id) {
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id = _Util['default'].getUID(NAME);
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$(config.target).attr('id', id);
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}
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config.target = '#' + id;
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}
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_Util['default'].typeCheckConfig(NAME, config, DefaultType);
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return config;
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}
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}, {
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key: '_getScrollTop',
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value: function _getScrollTop() {
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return this._scrollElement === window ? this._scrollElement.scrollY : this._scrollElement.scrollTop;
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}
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}, {
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key: '_getScrollHeight',
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value: function _getScrollHeight() {
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return this._scrollElement.scrollHeight || Math.max(document.body.scrollHeight, document.documentElement.scrollHeight);
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}
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}, {
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key: '_process',
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value: function _process() {
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var scrollTop = this._getScrollTop() + this._config.offset;
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var scrollHeight = this._getScrollHeight();
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var maxScroll = this._config.offset + scrollHeight - this._scrollElement.offsetHeight;
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if (this._scrollHeight !== scrollHeight) {
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this.refresh();
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}
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if (scrollTop >= maxScroll) {
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var target = this._targets[this._targets.length - 1];
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if (this._activeTarget !== target) {
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this._activate(target);
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}
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}
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if (this._activeTarget && scrollTop < this._offsets[0]) {
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this._activeTarget = null;
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this._clear();
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return;
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}
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for (var i = this._offsets.length; i--;) {
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var isActiveTarget = this._activeTarget !== this._targets[i] && scrollTop >= this._offsets[i] && (this._offsets[i + 1] === undefined || scrollTop < this._offsets[i + 1]);
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if (isActiveTarget) {
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this._activate(this._targets[i]);
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}
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}
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}
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}, {
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key: '_activate',
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value: function _activate(target) {
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this._activeTarget = target;
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this._clear();
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var queries = this._selector.split(',');
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queries = queries.map(function (selector) {
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return selector + '[data-target="' + target + '"],' + (selector + '[href="' + target + '"]');
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});
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var $link = $(queries.join(','));
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if ($link.hasClass(ClassName.DROPDOWN_ITEM)) {
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$link.closest(Selector.DROPDOWN).find(Selector.DROPDOWN_TOGGLE).addClass(ClassName.ACTIVE);
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$link.addClass(ClassName.ACTIVE);
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} else {
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// todo (fat) this is kinda sus…
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// recursively add actives to tested nav-links
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$link.parents(Selector.LI).find(Selector.NAV_LINKS).addClass(ClassName.ACTIVE);
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}
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$(this._scrollElement).trigger(Event.ACTIVATE, {
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relatedTarget: target
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});
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}
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}, {
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key: '_clear',
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value: function _clear() {
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$(this._selector).filter(Selector.ACTIVE).removeClass(ClassName.ACTIVE);
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}
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// static
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}], [{
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key: '_jQueryInterface',
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value: function _jQueryInterface(config) {
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return this.each(function () {
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var data = $(this).data(DATA_KEY);
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var _config = typeof config === 'object' && config || null;
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if (!data) {
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data = new ScrollSpy(this, _config);
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$(this).data(DATA_KEY, data);
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}
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if (typeof config === 'string') {
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data[config]();
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}
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});
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}
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}, {
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key: 'VERSION',
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get: function get() {
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return VERSION;
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}
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}, {
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key: 'Default',
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get: function get() {
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return Default;
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}
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}]);
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return ScrollSpy;
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})();
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$(window).on(Event.LOAD_DATA_API, function () {
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var scrollSpys = $.makeArray($(Selector.DATA_SPY));
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for (var i = scrollSpys.length; i--;) {
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var $spy = $(scrollSpys[i]);
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ScrollSpy._jQueryInterface.call($spy, $spy.data());
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}
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});
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/**
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* ------------------------------------------------------------------------
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* jQuery
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* ------------------------------------------------------------------------
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*/
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$.fn[NAME] = ScrollSpy._jQueryInterface;
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$.fn[NAME].Constructor = ScrollSpy;
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$.fn[NAME].noConflict = function () {
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$.fn[NAME] = JQUERY_NO_CONFLICT;
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return ScrollSpy._jQueryInterface;
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};
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return ScrollSpy;
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})(jQuery);
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module.exports = ScrollSpy;
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});
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