forked from joomla/Component-Builder
299 lines
10 KiB
JavaScript
299 lines
10 KiB
JavaScript
/*! UIkit 2.21.0 | http://www.getuikit.com | (c) 2014 YOOtheme | MIT License */
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(function(addon) {
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var component;
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if (window.UIkit) {
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component = addon(UIkit);
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}
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if (typeof define == "function" && define.amd) {
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define("uikit-sticky", ["uikit"], function(){
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return component || addon(UIkit);
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});
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}
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})(function(UI){
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"use strict";
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var $win = UI.$win,
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$doc = UI.$doc,
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sticked = [];
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UI.component('sticky', {
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defaults: {
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top : 0,
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bottom : 0,
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animation : '',
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clsinit : 'uk-sticky-init',
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clsactive : 'uk-active',
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getWidthFrom : '',
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boundary : false,
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media : false,
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target : false,
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disabled : false
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},
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boot: function() {
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// should be more efficient than using $win.scroll(checkscrollposition):
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UI.$doc.on('scrolling.uk.document', function() { checkscrollposition(); });
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UI.$win.on('resize orientationchange', UI.Utils.debounce(function() {
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if (!sticked.length) return;
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for (var i = 0; i < sticked.length; i++) {
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sticked[i].reset(true);
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sticked[i].self.computeWrapper();
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}
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checkscrollposition();
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}, 100));
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// init code
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UI.ready(function(context) {
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setTimeout(function(){
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UI.$("[data-uk-sticky]", context).each(function(){
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var $ele = UI.$(this);
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if(!$ele.data("sticky")) {
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UI.sticky($ele, UI.Utils.options($ele.attr('data-uk-sticky')));
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}
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});
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checkscrollposition();
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}, 0);
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});
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},
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init: function() {
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var wrapper = UI.$('<div class="uk-sticky-placeholder"></div>'), boundary = this.options.boundary, boundtoparent;
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this.wrapper = this.element.css('margin', 0).wrap(wrapper).parent();
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this.computeWrapper();
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if (boundary) {
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if (boundary === true) {
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boundary = this.wrapper.parent();
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boundtoparent = true;
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} else if (typeof boundary === "string") {
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boundary = UI.$(boundary);
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}
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}
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this.sticky = {
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self : this,
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options : this.options,
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element : this.element,
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currentTop : null,
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wrapper : this.wrapper,
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init : false,
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getWidthFrom : this.options.getWidthFrom || this.wrapper,
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boundary : boundary,
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boundtoparent : boundtoparent,
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reset : function(force) {
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var finalize = function() {
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this.element.css({"position":"", "top":"", "width":"", "left":"", "margin":"0"});
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this.element.removeClass([this.options.animation, 'uk-animation-reverse', this.options.clsactive].join(' '));
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this.currentTop = null;
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this.animate = false;
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}.bind(this);
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if (!force && this.options.animation && UI.support.animation) {
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this.animate = true;
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this.element.removeClass(this.options.animation).one(UI.support.animation.end, function(){
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finalize();
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}).width(); // force redraw
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this.element.addClass(this.options.animation+' '+'uk-animation-reverse');
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} else {
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finalize();
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}
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},
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check: function() {
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if (this.options.disabled) {
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return false;
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}
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if (this.options.media) {
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switch(typeof(this.options.media)) {
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case 'number':
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if (window.innerWidth < this.options.media) {
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return false;
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}
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break;
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case 'string':
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if (window.matchMedia && !window.matchMedia(this.options.media).matches) {
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return false;
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}
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break;
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}
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}
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var scrollTop = $win.scrollTop(),
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documentHeight = $doc.height(),
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dwh = documentHeight - window.innerHeight,
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extra = (scrollTop > dwh) ? dwh - scrollTop : 0,
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elementTop = this.wrapper.offset().top,
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etse = elementTop - this.options.top - extra;
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return (scrollTop >= etse);
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}
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};
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sticked.push(this.sticky);
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},
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update: function() {
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checkscrollposition(this.sticky);
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},
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enable: function() {
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this.options.disabled = false;
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this.update();
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},
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disable: function(force) {
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this.options.disabled = true;
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this.sticky.reset(force);
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},
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computeWrapper: function() {
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this.wrapper.css({
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'height' : this.element.css('position') != 'absolute' ? this.element.outerHeight() : '',
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'float' : this.element.css("float") != "none" ? this.element.css("float") : '',
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'margin' : this.element.css("margin")
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});
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}
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});
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function checkscrollposition() {
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var stickies = arguments.length ? arguments : sticked;
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if (!stickies.length || $win.scrollTop() < 0) return;
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var scrollTop = $win.scrollTop(),
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documentHeight = $doc.height(),
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windowHeight = $win.height(),
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dwh = documentHeight - windowHeight,
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extra = (scrollTop > dwh) ? dwh - scrollTop : 0,
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newTop, containerBottom, stickyHeight, sticky;
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for (var i = 0; i < stickies.length; i++) {
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sticky = stickies[i];
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if (!sticky.element.is(":visible") || sticky.animate) {
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continue;
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}
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if (!sticky.check()) {
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if (sticky.currentTop !== null) {
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sticky.reset();
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}
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} else {
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if (sticky.options.top < 0) {
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newTop = 0;
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} else {
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stickyHeight = sticky.element.outerHeight();
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newTop = documentHeight - stickyHeight - sticky.options.top - sticky.options.bottom - scrollTop - extra;
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newTop = newTop < 0 ? newTop + sticky.options.top : sticky.options.top;
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}
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if (sticky.boundary && sticky.boundary.length) {
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var bTop = sticky.boundary.position().top;
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if (sticky.boundtoparent) {
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containerBottom = documentHeight - (bTop + sticky.boundary.outerHeight()) + parseInt(sticky.boundary.css('padding-bottom'));
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} else {
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containerBottom = documentHeight - bTop - parseInt(sticky.boundary.css('margin-top'));
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}
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newTop = (scrollTop + stickyHeight) > (documentHeight - containerBottom - (sticky.options.top < 0 ? 0 : sticky.options.top)) ? (documentHeight - containerBottom) - (scrollTop + stickyHeight) : newTop;
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}
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if (sticky.currentTop != newTop) {
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sticky.element.css({
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"position" : "fixed",
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"top" : newTop,
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"width" : (typeof sticky.getWidthFrom !== 'undefined') ? UI.$(sticky.getWidthFrom).width() : sticky.element.width(),
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"left" : sticky.wrapper.offset().left
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});
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if (!sticky.init) {
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sticky.element.addClass(sticky.options.clsinit);
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if (location.hash && scrollTop > 0 && sticky.options.target) {
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var $target = UI.$(location.hash);
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if ($target.length) {
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setTimeout((function($target, sticky){
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return function() {
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sticky.element.width(); // force redraw
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var offset = $target.offset(),
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maxoffset = offset.top + $target.outerHeight(),
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stickyOffset = sticky.element.offset(),
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stickyHeight = sticky.element.outerHeight(),
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stickyMaxOffset = stickyOffset.top + stickyHeight;
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if (stickyOffset.top < maxoffset && offset.top < stickyMaxOffset) {
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scrollTop = offset.top - stickyHeight - sticky.options.target;
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window.scrollTo(0, scrollTop);
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}
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};
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})($target, sticky), 0);
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}
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}
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}
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sticky.element.addClass(sticky.options.clsactive);
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sticky.element.css('margin', '');
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if (sticky.options.animation && sticky.init) {
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sticky.element.addClass(sticky.options.animation);
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}
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sticky.currentTop = newTop;
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}
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}
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sticky.init = true;
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}
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}
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return UI.sticky;
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});
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