3734 lines
92 KiB
JavaScript
3734 lines
92 KiB
JavaScript
/*! PhotoSwipe - v4.1.2 - 2017-04-05
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* http://photoswipe.com
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* Copyright (c) 2017 Dmitry Semenov; */
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(function (root, factory) {
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if (typeof define === 'function' && define.amd) {
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define(factory);
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} else if (typeof exports === 'object') {
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module.exports = factory();
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} else {
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root.PhotoSwipe = factory();
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}
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})(this, function () {
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'use strict';
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var PhotoSwipe = function(template, UiClass, items, options){
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/*>>framework-bridge*/
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/**
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*
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* Set of generic functions used by gallery.
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*
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* You're free to modify anything here as long as functionality is kept.
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*
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*/
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var framework = {
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features: null,
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bind: function(target, type, listener, unbind) {
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var methodName = (unbind ? 'remove' : 'add') + 'EventListener';
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type = type.split(' ');
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for(var i = 0; i < type.length; i++) {
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if(type[i]) {
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target[methodName]( type[i], listener, false);
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}
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}
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},
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isArray: function(obj) {
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return (obj instanceof Array);
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},
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createEl: function(classes, tag) {
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var el = document.createElement(tag || 'div');
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if(classes) {
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el.className = classes;
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}
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return el;
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},
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getScrollY: function() {
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var yOffset = window.pageYOffset;
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return yOffset !== undefined ? yOffset : document.documentElement.scrollTop;
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},
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unbind: function(target, type, listener) {
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framework.bind(target,type,listener,true);
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},
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removeClass: function(el, className) {
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var reg = new RegExp('(\\s|^)' + className + '(\\s|$)');
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el.className = el.className.replace(reg, ' ').replace(/^\s\s*/, '').replace(/\s\s*$/, '');
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},
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addClass: function(el, className) {
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if( !framework.hasClass(el,className) ) {
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el.className += (el.className ? ' ' : '') + className;
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}
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},
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hasClass: function(el, className) {
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return el.className && new RegExp('(^|\\s)' + className + '(\\s|$)').test(el.className);
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},
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getChildByClass: function(parentEl, childClassName) {
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var node = parentEl.firstChild;
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while(node) {
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if( framework.hasClass(node, childClassName) ) {
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return node;
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}
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node = node.nextSibling;
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}
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},
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arraySearch: function(array, value, key) {
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var i = array.length;
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while(i--) {
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if(array[i][key] === value) {
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return i;
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}
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}
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return -1;
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},
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extend: function(o1, o2, preventOverwrite) {
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for (var prop in o2) {
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if (o2.hasOwnProperty(prop)) {
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if(preventOverwrite && o1.hasOwnProperty(prop)) {
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continue;
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}
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o1[prop] = o2[prop];
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}
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}
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},
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easing: {
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sine: {
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out: function(k) {
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return Math.sin(k * (Math.PI / 2));
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},
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inOut: function(k) {
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return - (Math.cos(Math.PI * k) - 1) / 2;
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}
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},
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cubic: {
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out: function(k) {
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return --k * k * k + 1;
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}
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}
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/*
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elastic: {
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out: function ( k ) {
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var s, a = 0.1, p = 0.4;
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||
if ( k === 0 ) return 0;
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||
if ( k === 1 ) return 1;
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||
if ( !a || a < 1 ) { a = 1; s = p / 4; }
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else s = p * Math.asin( 1 / a ) / ( 2 * Math.PI );
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return ( a * Math.pow( 2, - 10 * k) * Math.sin( ( k - s ) * ( 2 * Math.PI ) / p ) + 1 );
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},
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},
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back: {
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out: function ( k ) {
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var s = 1.70158;
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return --k * k * ( ( s + 1 ) * k + s ) + 1;
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||
}
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}
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*/
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},
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/**
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||
*
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||
* @return {object}
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||
*
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||
* {
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||
* raf : request animation frame function
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||
* caf : cancel animation frame function
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||
* transfrom : transform property key (with vendor), or null if not supported
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||
* oldIE : IE8 or below
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||
* }
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||
*
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||
*/
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||
detectFeatures: function() {
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||
if(framework.features) {
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||
return framework.features;
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||
}
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||
var helperEl = framework.createEl(),
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helperStyle = helperEl.style,
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||
vendor = '',
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||
features = {};
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||
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// IE8 and below
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features.oldIE = document.all && !document.addEventListener;
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||
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features.touch = 'ontouchstart' in window;
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||
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||
if(window.requestAnimationFrame) {
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||
features.raf = window.requestAnimationFrame;
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||
features.caf = window.cancelAnimationFrame;
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||
}
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||
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||
features.pointerEvent = navigator.pointerEnabled || navigator.msPointerEnabled;
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||
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||
// fix false-positive detection of old Android in new IE
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||
// (IE11 ua string contains "Android 4.0")
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||
if(!features.pointerEvent) {
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||
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||
var ua = navigator.userAgent;
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||
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||
// Detect if device is iPhone or iPod and if it's older than iOS 8
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||
// http://stackoverflow.com/a/14223920
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||
//
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||
// This detection is made because of buggy top/bottom toolbars
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||
// that don't trigger window.resize event.
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||
// For more info refer to _isFixedPosition variable in core.js
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||
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||
if (/iP(hone|od)/.test(navigator.platform)) {
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||
var v = (navigator.appVersion).match(/OS (\d+)_(\d+)_?(\d+)?/);
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if(v && v.length > 0) {
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||
v = parseInt(v[1], 10);
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||
if(v >= 1 && v < 8 ) {
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||
features.isOldIOSPhone = true;
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||
}
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||
}
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||
}
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||
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||
// Detect old Android (before KitKat)
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||
// due to bugs related to position:fixed
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||
// http://stackoverflow.com/questions/7184573/pick-up-the-android-version-in-the-browser-by-javascript
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||
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var match = ua.match(/Android\s([0-9\.]*)/);
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||
var androidversion = match ? match[1] : 0;
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androidversion = parseFloat(androidversion);
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||
if(androidversion >= 1 ) {
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||
if(androidversion < 4.4) {
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||
features.isOldAndroid = true; // for fixed position bug & performance
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||
}
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||
features.androidVersion = androidversion; // for touchend bug
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||
}
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||
features.isMobileOpera = /opera mini|opera mobi/i.test(ua);
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||
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||
// p.s. yes, yes, UA sniffing is bad, propose your solution for above bugs.
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||
}
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||
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||
var styleChecks = ['transform', 'perspective', 'animationName'],
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||
vendors = ['', 'webkit','Moz','ms','O'],
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styleCheckItem,
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styleName;
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||
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for(var i = 0; i < 4; i++) {
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vendor = vendors[i];
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||
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||
for(var a = 0; a < 3; a++) {
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||
styleCheckItem = styleChecks[a];
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||
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||
// uppercase first letter of property name, if vendor is present
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||
styleName = vendor + (vendor ?
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styleCheckItem.charAt(0).toUpperCase() + styleCheckItem.slice(1) :
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||
styleCheckItem);
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||
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||
if(!features[styleCheckItem] && styleName in helperStyle ) {
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features[styleCheckItem] = styleName;
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||
}
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||
}
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if(vendor && !features.raf) {
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vendor = vendor.toLowerCase();
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features.raf = window[vendor+'RequestAnimationFrame'];
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if(features.raf) {
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||
features.caf = window[vendor+'CancelAnimationFrame'] ||
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window[vendor+'CancelRequestAnimationFrame'];
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}
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||
}
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||
}
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||
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||
if(!features.raf) {
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||
var lastTime = 0;
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features.raf = function(fn) {
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||
var currTime = new Date().getTime();
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||
var timeToCall = Math.max(0, 16 - (currTime - lastTime));
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||
var id = window.setTimeout(function() { fn(currTime + timeToCall); }, timeToCall);
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lastTime = currTime + timeToCall;
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return id;
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||
};
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features.caf = function(id) { clearTimeout(id); };
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||
}
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||
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// Detect SVG support
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||
features.svg = !!document.createElementNS &&
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!!document.createElementNS('http://www.w3.org/2000/svg', 'svg').createSVGRect;
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||
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||
framework.features = features;
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||
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||
return features;
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||
}
|
||
};
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framework.detectFeatures();
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||
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||
// Override addEventListener for old versions of IE
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||
if(framework.features.oldIE) {
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||
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||
framework.bind = function(target, type, listener, unbind) {
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||
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||
type = type.split(' ');
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||
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||
var methodName = (unbind ? 'detach' : 'attach') + 'Event',
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||
evName,
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||
_handleEv = function() {
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||
listener.handleEvent.call(listener);
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||
};
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||
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||
for(var i = 0; i < type.length; i++) {
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||
evName = type[i];
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||
if(evName) {
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||
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||
if(typeof listener === 'object' && listener.handleEvent) {
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||
if(!unbind) {
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||
listener['oldIE' + evName] = _handleEv;
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||
} else {
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||
if(!listener['oldIE' + evName]) {
|
||
return false;
|
||
}
|
||
}
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||
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||
target[methodName]( 'on' + evName, listener['oldIE' + evName]);
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||
} else {
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||
target[methodName]( 'on' + evName, listener);
|
||
}
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||
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||
}
|
||
}
|
||
};
|
||
|
||
}
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||
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||
/*>>framework-bridge*/
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||
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||
/*>>core*/
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||
//function(template, UiClass, items, options)
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||
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||
var self = this;
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||
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/**
|
||
* Static vars, don't change unless you know what you're doing.
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||
*/
|
||
var DOUBLE_TAP_RADIUS = 25,
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NUM_HOLDERS = 3;
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/**
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||
* Options
|
||
*/
|
||
var _options = {
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||
allowPanToNext:true,
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spacing: 0.12,
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bgOpacity: 1,
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mouseUsed: false,
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loop: true,
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||
pinchToClose: true,
|
||
closeOnScroll: true,
|
||
closeOnVerticalDrag: true,
|
||
verticalDragRange: 0.75,
|
||
hideAnimationDuration: 333,
|
||
showAnimationDuration: 333,
|
||
showHideOpacity: false,
|
||
focus: true,
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||
escKey: true,
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||
arrowKeys: true,
|
||
mainScrollEndFriction: 0.35,
|
||
panEndFriction: 0.35,
|
||
isClickableElement: function(el) {
|
||
return el.tagName === 'A';
|
||
},
|
||
getDoubleTapZoom: function(isMouseClick, item) {
|
||
if(isMouseClick) {
|
||
return 1;
|
||
} else {
|
||
return item.initialZoomLevel < 0.7 ? 1 : 1.33;
|
||
}
|
||
},
|
||
maxSpreadZoom: 1.33,
|
||
modal: true,
|
||
|
||
// not fully implemented yet
|
||
scaleMode: 'fit' // TODO
|
||
};
|
||
framework.extend(_options, options);
|
||
|
||
|
||
/**
|
||
* Private helper variables & functions
|
||
*/
|
||
|
||
var _getEmptyPoint = function() {
|
||
return {x:0,y:0};
|
||
};
|
||
|
||
var _isOpen,
|
||
_isDestroying,
|
||
_closedByScroll,
|
||
_currentItemIndex,
|
||
_containerStyle,
|
||
_containerShiftIndex,
|
||
_currPanDist = _getEmptyPoint(),
|
||
_startPanOffset = _getEmptyPoint(),
|
||
_panOffset = _getEmptyPoint(),
|
||
_upMoveEvents, // drag move, drag end & drag cancel events array
|
||
_downEvents, // drag start events array
|
||
_globalEventHandlers,
|
||
_viewportSize = {},
|
||
_currZoomLevel,
|
||
_startZoomLevel,
|
||
_translatePrefix,
|
||
_translateSufix,
|
||
_updateSizeInterval,
|
||
_itemsNeedUpdate,
|
||
_currPositionIndex = 0,
|
||
_offset = {},
|
||
_slideSize = _getEmptyPoint(), // size of slide area, including spacing
|
||
_itemHolders,
|
||
_prevItemIndex,
|
||
_indexDiff = 0, // difference of indexes since last content update
|
||
_dragStartEvent,
|
||
_dragMoveEvent,
|
||
_dragEndEvent,
|
||
_dragCancelEvent,
|
||
_transformKey,
|
||
_pointerEventEnabled,
|
||
_isFixedPosition = true,
|
||
_likelyTouchDevice,
|
||
_modules = [],
|
||
_requestAF,
|
||
_cancelAF,
|
||
_initalClassName,
|
||
_initalWindowScrollY,
|
||
_oldIE,
|
||
_currentWindowScrollY,
|
||
_features,
|
||
_windowVisibleSize = {},
|
||
_renderMaxResolution = false,
|
||
_orientationChangeTimeout,
|
||
|
||
|
||
// Registers PhotoSWipe module (History, Controller ...)
|
||
_registerModule = function(name, module) {
|
||
framework.extend(self, module.publicMethods);
|
||
_modules.push(name);
|
||
},
|
||
|
||
_getLoopedId = function(index) {
|
||
var numSlides = _getNumItems();
|
||
if(index > numSlides - 1) {
|
||
return index - numSlides;
|
||
} else if(index < 0) {
|
||
return numSlides + index;
|
||
}
|
||
return index;
|
||
},
|
||
|
||
// Micro bind/trigger
|
||
_listeners = {},
|
||
_listen = function(name, fn) {
|
||
if(!_listeners[name]) {
|
||
_listeners[name] = [];
|
||
}
|
||
return _listeners[name].push(fn);
|
||
},
|
||
_shout = function(name) {
|
||
var listeners = _listeners[name];
|
||
|
||
if(listeners) {
|
||
var args = Array.prototype.slice.call(arguments);
|
||
args.shift();
|
||
|
||
for(var i = 0; i < listeners.length; i++) {
|
||
listeners[i].apply(self, args);
|
||
}
|
||
}
|
||
},
|
||
|
||
_getCurrentTime = function() {
|
||
return new Date().getTime();
|
||
},
|
||
_applyBgOpacity = function(opacity) {
|
||
_bgOpacity = opacity;
|
||
self.bg.style.opacity = opacity * _options.bgOpacity;
|
||
},
|
||
|
||
_applyZoomTransform = function(styleObj,x,y,zoom,item) {
|
||
if(!_renderMaxResolution || (item && item !== self.currItem) ) {
|
||
zoom = zoom / (item ? item.fitRatio : self.currItem.fitRatio);
|
||
}
|
||
|
||
styleObj[_transformKey] = _translatePrefix + x + 'px, ' + y + 'px' + _translateSufix + ' scale(' + zoom + ')';
|
||
},
|
||
_applyCurrentZoomPan = function( allowRenderResolution ) {
|
||
if(_currZoomElementStyle) {
|
||
|
||
if(allowRenderResolution) {
|
||
if(_currZoomLevel > self.currItem.fitRatio) {
|
||
if(!_renderMaxResolution) {
|
||
_setImageSize(self.currItem, false, true);
|
||
_renderMaxResolution = true;
|
||
}
|
||
} else {
|
||
if(_renderMaxResolution) {
|
||
_setImageSize(self.currItem);
|
||
_renderMaxResolution = false;
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
_applyZoomTransform(_currZoomElementStyle, _panOffset.x, _panOffset.y, _currZoomLevel);
|
||
}
|
||
},
|
||
_applyZoomPanToItem = function(item) {
|
||
if(item.container) {
|
||
|
||
_applyZoomTransform(item.container.style,
|
||
item.initialPosition.x,
|
||
item.initialPosition.y,
|
||
item.initialZoomLevel,
|
||
item);
|
||
}
|
||
},
|
||
_setTranslateX = function(x, elStyle) {
|
||
elStyle[_transformKey] = _translatePrefix + x + 'px, 0px' + _translateSufix;
|
||
},
|
||
_moveMainScroll = function(x, dragging) {
|
||
|
||
if(!_options.loop && dragging) {
|
||
var newSlideIndexOffset = _currentItemIndex + (_slideSize.x * _currPositionIndex - x) / _slideSize.x,
|
||
delta = Math.round(x - _mainScrollPos.x);
|
||
|
||
if( (newSlideIndexOffset < 0 && delta > 0) ||
|
||
(newSlideIndexOffset >= _getNumItems() - 1 && delta < 0) ) {
|
||
x = _mainScrollPos.x + delta * _options.mainScrollEndFriction;
|
||
}
|
||
}
|
||
|
||
_mainScrollPos.x = x;
|
||
_setTranslateX(x, _containerStyle);
|
||
},
|
||
_calculatePanOffset = function(axis, zoomLevel) {
|
||
var m = _midZoomPoint[axis] - _offset[axis];
|
||
return _startPanOffset[axis] + _currPanDist[axis] + m - m * ( zoomLevel / _startZoomLevel );
|
||
},
|
||
|
||
_equalizePoints = function(p1, p2) {
|
||
p1.x = p2.x;
|
||
p1.y = p2.y;
|
||
if(p2.id) {
|
||
p1.id = p2.id;
|
||
}
|
||
},
|
||
_roundPoint = function(p) {
|
||
p.x = Math.round(p.x);
|
||
p.y = Math.round(p.y);
|
||
},
|
||
|
||
_mouseMoveTimeout = null,
|
||
_onFirstMouseMove = function() {
|
||
// Wait until mouse move event is fired at least twice during 100ms
|
||
// We do this, because some mobile browsers trigger it on touchstart
|
||
if(_mouseMoveTimeout ) {
|
||
framework.unbind(document, 'mousemove', _onFirstMouseMove);
|
||
framework.addClass(template, 'pswp--has_mouse');
|
||
_options.mouseUsed = true;
|
||
_shout('mouseUsed');
|
||
}
|
||
_mouseMoveTimeout = setTimeout(function() {
|
||
_mouseMoveTimeout = null;
|
||
}, 100);
|
||
},
|
||
|
||
_bindEvents = function() {
|
||
framework.bind(document, 'keydown', self);
|
||
|
||
if(_features.transform) {
|
||
// don't bind click event in browsers that don't support transform (mostly IE8)
|
||
framework.bind(self.scrollWrap, 'click', self);
|
||
}
|
||
|
||
|
||
if(!_options.mouseUsed) {
|
||
framework.bind(document, 'mousemove', _onFirstMouseMove);
|
||
}
|
||
|
||
framework.bind(window, 'resize scroll orientationchange', self);
|
||
|
||
_shout('bindEvents');
|
||
},
|
||
|
||
_unbindEvents = function() {
|
||
framework.unbind(window, 'resize scroll orientationchange', self);
|
||
framework.unbind(window, 'scroll', _globalEventHandlers.scroll);
|
||
framework.unbind(document, 'keydown', self);
|
||
framework.unbind(document, 'mousemove', _onFirstMouseMove);
|
||
|
||
if(_features.transform) {
|
||
framework.unbind(self.scrollWrap, 'click', self);
|
||
}
|
||
|
||
if(_isDragging) {
|
||
framework.unbind(window, _upMoveEvents, self);
|
||
}
|
||
|
||
clearTimeout(_orientationChangeTimeout);
|
||
|
||
_shout('unbindEvents');
|
||
},
|
||
|
||
_calculatePanBounds = function(zoomLevel, update) {
|
||
var bounds = _calculateItemSize( self.currItem, _viewportSize, zoomLevel );
|
||
if(update) {
|
||
_currPanBounds = bounds;
|
||
}
|
||
return bounds;
|
||
},
|
||
|
||
_getMinZoomLevel = function(item) {
|
||
if(!item) {
|
||
item = self.currItem;
|
||
}
|
||
return item.initialZoomLevel;
|
||
},
|
||
_getMaxZoomLevel = function(item) {
|
||
if(!item) {
|
||
item = self.currItem;
|
||
}
|
||
return item.w > 0 ? _options.maxSpreadZoom : 1;
|
||
},
|
||
|
||
// Return true if offset is out of the bounds
|
||
_modifyDestPanOffset = function(axis, destPanBounds, destPanOffset, destZoomLevel) {
|
||
if(destZoomLevel === self.currItem.initialZoomLevel) {
|
||
destPanOffset[axis] = self.currItem.initialPosition[axis];
|
||
return true;
|
||
} else {
|
||
destPanOffset[axis] = _calculatePanOffset(axis, destZoomLevel);
|
||
|
||
if(destPanOffset[axis] > destPanBounds.min[axis]) {
|
||
destPanOffset[axis] = destPanBounds.min[axis];
|
||
return true;
|
||
} else if(destPanOffset[axis] < destPanBounds.max[axis] ) {
|
||
destPanOffset[axis] = destPanBounds.max[axis];
|
||
return true;
|
||
}
|
||
}
|
||
return false;
|
||
},
|
||
|
||
_setupTransforms = function() {
|
||
|
||
if(_transformKey) {
|
||
// setup 3d transforms
|
||
var allow3dTransform = _features.perspective && !_likelyTouchDevice;
|
||
_translatePrefix = 'translate' + (allow3dTransform ? '3d(' : '(');
|
||
_translateSufix = _features.perspective ? ', 0px)' : ')';
|
||
return;
|
||
}
|
||
|
||
// Override zoom/pan/move functions in case old browser is used (most likely IE)
|
||
// (so they use left/top/width/height, instead of CSS transform)
|
||
|
||
_transformKey = 'left';
|
||
framework.addClass(template, 'pswp--ie');
|
||
|
||
_setTranslateX = function(x, elStyle) {
|
||
elStyle.left = x + 'px';
|
||
};
|
||
_applyZoomPanToItem = function(item) {
|
||
|
||
var zoomRatio = item.fitRatio > 1 ? 1 : item.fitRatio,
|
||
s = item.container.style,
|
||
w = zoomRatio * item.w,
|
||
h = zoomRatio * item.h;
|
||
|
||
s.width = w + 'px';
|
||
s.height = h + 'px';
|
||
s.left = item.initialPosition.x + 'px';
|
||
s.top = item.initialPosition.y + 'px';
|
||
|
||
};
|
||
_applyCurrentZoomPan = function() {
|
||
if(_currZoomElementStyle) {
|
||
|
||
var s = _currZoomElementStyle,
|
||
item = self.currItem,
|
||
zoomRatio = item.fitRatio > 1 ? 1 : item.fitRatio,
|
||
w = zoomRatio * item.w,
|
||
h = zoomRatio * item.h;
|
||
|
||
s.width = w + 'px';
|
||
s.height = h + 'px';
|
||
|
||
|
||
s.left = _panOffset.x + 'px';
|
||
s.top = _panOffset.y + 'px';
|
||
}
|
||
|
||
};
|
||
},
|
||
|
||
_onKeyDown = function(e) {
|
||
var keydownAction = '';
|
||
if(_options.escKey && e.keyCode === 27) {
|
||
keydownAction = 'close';
|
||
} else if(_options.arrowKeys) {
|
||
if(e.keyCode === 37) {
|
||
keydownAction = 'prev';
|
||
} else if(e.keyCode === 39) {
|
||
keydownAction = 'next';
|
||
}
|
||
}
|
||
|
||
if(keydownAction) {
|
||
// don't do anything if special key pressed to prevent from overriding default browser actions
|
||
// e.g. in Chrome on Mac cmd+arrow-left returns to previous page
|
||
if( !e.ctrlKey && !e.altKey && !e.shiftKey && !e.metaKey ) {
|
||
if(e.preventDefault) {
|
||
e.preventDefault();
|
||
} else {
|
||
e.returnValue = false;
|
||
}
|
||
self[keydownAction]();
|
||
}
|
||
}
|
||
},
|
||
|
||
_onGlobalClick = function(e) {
|
||
if(!e) {
|
||
return;
|
||
}
|
||
|
||
// don't allow click event to pass through when triggering after drag or some other gesture
|
||
if(_moved || _zoomStarted || _mainScrollAnimating || _verticalDragInitiated) {
|
||
e.preventDefault();
|
||
e.stopPropagation();
|
||
}
|
||
},
|
||
|
||
_updatePageScrollOffset = function() {
|
||
self.setScrollOffset(0, framework.getScrollY());
|
||
};
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
// Micro animation engine
|
||
var _animations = {},
|
||
_numAnimations = 0,
|
||
_stopAnimation = function(name) {
|
||
if(_animations[name]) {
|
||
if(_animations[name].raf) {
|
||
_cancelAF( _animations[name].raf );
|
||
}
|
||
_numAnimations--;
|
||
delete _animations[name];
|
||
}
|
||
},
|
||
_registerStartAnimation = function(name) {
|
||
if(_animations[name]) {
|
||
_stopAnimation(name);
|
||
}
|
||
if(!_animations[name]) {
|
||
_numAnimations++;
|
||
_animations[name] = {};
|
||
}
|
||
},
|
||
_stopAllAnimations = function() {
|
||
for (var prop in _animations) {
|
||
|
||
if( _animations.hasOwnProperty( prop ) ) {
|
||
_stopAnimation(prop);
|
||
}
|
||
|
||
}
|
||
},
|
||
_animateProp = function(name, b, endProp, d, easingFn, onUpdate, onComplete) {
|
||
var startAnimTime = _getCurrentTime(), t;
|
||
_registerStartAnimation(name);
|
||
|
||
var animloop = function(){
|
||
if ( _animations[name] ) {
|
||
|
||
t = _getCurrentTime() - startAnimTime; // time diff
|
||
//b - beginning (start prop)
|
||
//d - anim duration
|
||
|
||
if ( t >= d ) {
|
||
_stopAnimation(name);
|
||
onUpdate(endProp);
|
||
if(onComplete) {
|
||
onComplete();
|
||
}
|
||
return;
|
||
}
|
||
onUpdate( (endProp - b) * easingFn(t/d) + b );
|
||
|
||
_animations[name].raf = _requestAF(animloop);
|
||
}
|
||
};
|
||
animloop();
|
||
};
|
||
|
||
|
||
|
||
var publicMethods = {
|
||
|
||
// make a few local variables and functions public
|
||
shout: _shout,
|
||
listen: _listen,
|
||
viewportSize: _viewportSize,
|
||
options: _options,
|
||
|
||
isMainScrollAnimating: function() {
|
||
return _mainScrollAnimating;
|
||
},
|
||
getZoomLevel: function() {
|
||
return _currZoomLevel;
|
||
},
|
||
getCurrentIndex: function() {
|
||
return _currentItemIndex;
|
||
},
|
||
isDragging: function() {
|
||
return _isDragging;
|
||
},
|
||
isZooming: function() {
|
||
return _isZooming;
|
||
},
|
||
setScrollOffset: function(x,y) {
|
||
_offset.x = x;
|
||
_currentWindowScrollY = _offset.y = y;
|
||
_shout('updateScrollOffset', _offset);
|
||
},
|
||
applyZoomPan: function(zoomLevel,panX,panY,allowRenderResolution) {
|
||
_panOffset.x = panX;
|
||
_panOffset.y = panY;
|
||
_currZoomLevel = zoomLevel;
|
||
_applyCurrentZoomPan( allowRenderResolution );
|
||
},
|
||
|
||
init: function() {
|
||
|
||
if(_isOpen || _isDestroying) {
|
||
return;
|
||
}
|
||
|
||
var i;
|
||
|
||
self.framework = framework; // basic functionality
|
||
self.template = template; // root DOM element of PhotoSwipe
|
||
self.bg = framework.getChildByClass(template, 'pswp__bg');
|
||
|
||
_initalClassName = template.className;
|
||
_isOpen = true;
|
||
|
||
_features = framework.detectFeatures();
|
||
_requestAF = _features.raf;
|
||
_cancelAF = _features.caf;
|
||
_transformKey = _features.transform;
|
||
_oldIE = _features.oldIE;
|
||
|
||
self.scrollWrap = framework.getChildByClass(template, 'pswp__scroll-wrap');
|
||
self.container = framework.getChildByClass(self.scrollWrap, 'pswp__container');
|
||
|
||
_containerStyle = self.container.style; // for fast access
|
||
|
||
// Objects that hold slides (there are only 3 in DOM)
|
||
self.itemHolders = _itemHolders = [
|
||
{el:self.container.children[0] , wrap:0, index: -1},
|
||
{el:self.container.children[1] , wrap:0, index: -1},
|
||
{el:self.container.children[2] , wrap:0, index: -1}
|
||
];
|
||
|
||
// hide nearby item holders until initial zoom animation finishes (to avoid extra Paints)
|
||
_itemHolders[0].el.style.display = _itemHolders[2].el.style.display = 'none';
|
||
|
||
_setupTransforms();
|
||
|
||
// Setup global events
|
||
_globalEventHandlers = {
|
||
resize: self.updateSize,
|
||
|
||
// Fixes: iOS 10.3 resize event
|
||
// does not update scrollWrap.clientWidth instantly after resize
|
||
// https://github.com/dimsemenov/PhotoSwipe/issues/1315
|
||
orientationchange: function() {
|
||
clearTimeout(_orientationChangeTimeout);
|
||
_orientationChangeTimeout = setTimeout(function() {
|
||
if(_viewportSize.x !== self.scrollWrap.clientWidth) {
|
||
self.updateSize();
|
||
}
|
||
}, 500);
|
||
},
|
||
scroll: _updatePageScrollOffset,
|
||
keydown: _onKeyDown,
|
||
click: _onGlobalClick
|
||
};
|
||
|
||
// disable show/hide effects on old browsers that don't support CSS animations or transforms,
|
||
// old IOS, Android and Opera mobile. Blackberry seems to work fine, even older models.
|
||
var oldPhone = _features.isOldIOSPhone || _features.isOldAndroid || _features.isMobileOpera;
|
||
if(!_features.animationName || !_features.transform || oldPhone) {
|
||
_options.showAnimationDuration = _options.hideAnimationDuration = 0;
|
||
}
|
||
|
||
// init modules
|
||
for(i = 0; i < _modules.length; i++) {
|
||
self['init' + _modules[i]]();
|
||
}
|
||
|
||
// init
|
||
if(UiClass) {
|
||
var ui = self.ui = new UiClass(self, framework);
|
||
ui.init();
|
||
}
|
||
|
||
_shout('firstUpdate');
|
||
_currentItemIndex = _currentItemIndex || _options.index || 0;
|
||
// validate index
|
||
if( isNaN(_currentItemIndex) || _currentItemIndex < 0 || _currentItemIndex >= _getNumItems() ) {
|
||
_currentItemIndex = 0;
|
||
}
|
||
self.currItem = _getItemAt( _currentItemIndex );
|
||
|
||
|
||
if(_features.isOldIOSPhone || _features.isOldAndroid) {
|
||
_isFixedPosition = false;
|
||
}
|
||
|
||
template.setAttribute('aria-hidden', 'false');
|
||
if(_options.modal) {
|
||
if(!_isFixedPosition) {
|
||
template.style.position = 'absolute';
|
||
template.style.top = framework.getScrollY() + 'px';
|
||
} else {
|
||
template.style.position = 'fixed';
|
||
}
|
||
}
|
||
|
||
if(_currentWindowScrollY === undefined) {
|
||
_shout('initialLayout');
|
||
_currentWindowScrollY = _initalWindowScrollY = framework.getScrollY();
|
||
}
|
||
|
||
// add classes to root element of PhotoSwipe
|
||
var rootClasses = 'pswp--open ';
|
||
if(_options.mainClass) {
|
||
rootClasses += _options.mainClass + ' ';
|
||
}
|
||
if(_options.showHideOpacity) {
|
||
rootClasses += 'pswp--animate_opacity ';
|
||
}
|
||
rootClasses += _likelyTouchDevice ? 'pswp--touch' : 'pswp--notouch';
|
||
rootClasses += _features.animationName ? ' pswp--css_animation' : '';
|
||
rootClasses += _features.svg ? ' pswp--svg' : '';
|
||
framework.addClass(template, rootClasses);
|
||
|
||
self.updateSize();
|
||
|
||
// initial update
|
||
_containerShiftIndex = -1;
|
||
_indexDiff = null;
|
||
for(i = 0; i < NUM_HOLDERS; i++) {
|
||
_setTranslateX( (i+_containerShiftIndex) * _slideSize.x, _itemHolders[i].el.style);
|
||
}
|
||
|
||
if(!_oldIE) {
|
||
framework.bind(self.scrollWrap, _downEvents, self); // no dragging for old IE
|
||
}
|
||
|
||
_listen('initialZoomInEnd', function() {
|
||
self.setContent(_itemHolders[0], _currentItemIndex-1);
|
||
self.setContent(_itemHolders[2], _currentItemIndex+1);
|
||
|
||
_itemHolders[0].el.style.display = _itemHolders[2].el.style.display = 'block';
|
||
|
||
if(_options.focus) {
|
||
// focus causes layout,
|
||
// which causes lag during the animation,
|
||
// that's why we delay it untill the initial zoom transition ends
|
||
template.focus();
|
||
}
|
||
|
||
|
||
_bindEvents();
|
||
});
|
||
|
||
// set content for center slide (first time)
|
||
self.setContent(_itemHolders[1], _currentItemIndex);
|
||
|
||
self.updateCurrItem();
|
||
|
||
_shout('afterInit');
|
||
|
||
if(!_isFixedPosition) {
|
||
|
||
// On all versions of iOS lower than 8.0, we check size of viewport every second.
|
||
//
|
||
// This is done to detect when Safari top & bottom bars appear,
|
||
// as this action doesn't trigger any events (like resize).
|
||
//
|
||
// On iOS8 they fixed this.
|
||
//
|
||
// 10 Nov 2014: iOS 7 usage ~40%. iOS 8 usage 56%.
|
||
|
||
_updateSizeInterval = setInterval(function() {
|
||
if(!_numAnimations && !_isDragging && !_isZooming && (_currZoomLevel === self.currItem.initialZoomLevel) ) {
|
||
self.updateSize();
|
||
}
|
||
}, 1000);
|
||
}
|
||
|
||
framework.addClass(template, 'pswp--visible');
|
||
},
|
||
|
||
// Close the gallery, then destroy it
|
||
close: function() {
|
||
if(!_isOpen) {
|
||
return;
|
||
}
|
||
|
||
_isOpen = false;
|
||
_isDestroying = true;
|
||
_shout('close');
|
||
_unbindEvents();
|
||
|
||
_showOrHide(self.currItem, null, true, self.destroy);
|
||
},
|
||
|
||
// destroys the gallery (unbinds events, cleans up intervals and timeouts to avoid memory leaks)
|
||
destroy: function() {
|
||
_shout('destroy');
|
||
|
||
if(_showOrHideTimeout) {
|
||
clearTimeout(_showOrHideTimeout);
|
||
}
|
||
|
||
template.setAttribute('aria-hidden', 'true');
|
||
template.className = _initalClassName;
|
||
|
||
if(_updateSizeInterval) {
|
||
clearInterval(_updateSizeInterval);
|
||
}
|
||
|
||
framework.unbind(self.scrollWrap, _downEvents, self);
|
||
|
||
// we unbind scroll event at the end, as closing animation may depend on it
|
||
framework.unbind(window, 'scroll', self);
|
||
|
||
_stopDragUpdateLoop();
|
||
|
||
_stopAllAnimations();
|
||
|
||
_listeners = null;
|
||
},
|
||
|
||
/**
|
||
* Pan image to position
|
||
* @param {Number} x
|
||
* @param {Number} y
|
||
* @param {Boolean} force Will ignore bounds if set to true.
|
||
*/
|
||
panTo: function(x,y,force) {
|
||
if(!force) {
|
||
if(x > _currPanBounds.min.x) {
|
||
x = _currPanBounds.min.x;
|
||
} else if(x < _currPanBounds.max.x) {
|
||
x = _currPanBounds.max.x;
|
||
}
|
||
|
||
if(y > _currPanBounds.min.y) {
|
||
y = _currPanBounds.min.y;
|
||
} else if(y < _currPanBounds.max.y) {
|
||
y = _currPanBounds.max.y;
|
||
}
|
||
}
|
||
|
||
_panOffset.x = x;
|
||
_panOffset.y = y;
|
||
_applyCurrentZoomPan();
|
||
},
|
||
|
||
handleEvent: function (e) {
|
||
e = e || window.event;
|
||
if(_globalEventHandlers[e.type]) {
|
||
_globalEventHandlers[e.type](e);
|
||
}
|
||
},
|
||
|
||
|
||
goTo: function(index) {
|
||
|
||
index = _getLoopedId(index);
|
||
|
||
var diff = index - _currentItemIndex;
|
||
_indexDiff = diff;
|
||
|
||
_currentItemIndex = index;
|
||
self.currItem = _getItemAt( _currentItemIndex );
|
||
_currPositionIndex -= diff;
|
||
|
||
_moveMainScroll(_slideSize.x * _currPositionIndex);
|
||
|
||
|
||
_stopAllAnimations();
|
||
_mainScrollAnimating = false;
|
||
|
||
self.updateCurrItem();
|
||
},
|
||
next: function() {
|
||
self.goTo( _currentItemIndex + 1);
|
||
},
|
||
prev: function() {
|
||
self.goTo( _currentItemIndex - 1);
|
||
},
|
||
|
||
// update current zoom/pan objects
|
||
updateCurrZoomItem: function(emulateSetContent) {
|
||
if(emulateSetContent) {
|
||
_shout('beforeChange', 0);
|
||
}
|
||
|
||
// itemHolder[1] is middle (current) item
|
||
if(_itemHolders[1].el.children.length) {
|
||
var zoomElement = _itemHolders[1].el.children[0];
|
||
if( framework.hasClass(zoomElement, 'pswp__zoom-wrap') ) {
|
||
_currZoomElementStyle = zoomElement.style;
|
||
} else {
|
||
_currZoomElementStyle = null;
|
||
}
|
||
} else {
|
||
_currZoomElementStyle = null;
|
||
}
|
||
|
||
_currPanBounds = self.currItem.bounds;
|
||
_startZoomLevel = _currZoomLevel = self.currItem.initialZoomLevel;
|
||
|
||
_panOffset.x = _currPanBounds.center.x;
|
||
_panOffset.y = _currPanBounds.center.y;
|
||
|
||
if(emulateSetContent) {
|
||
_shout('afterChange');
|
||
}
|
||
},
|
||
|
||
|
||
invalidateCurrItems: function() {
|
||
_itemsNeedUpdate = true;
|
||
for(var i = 0; i < NUM_HOLDERS; i++) {
|
||
if( _itemHolders[i].item ) {
|
||
_itemHolders[i].item.needsUpdate = true;
|
||
}
|
||
}
|
||
},
|
||
|
||
updateCurrItem: function(beforeAnimation) {
|
||
|
||
if(_indexDiff === 0) {
|
||
return;
|
||
}
|
||
|
||
var diffAbs = Math.abs(_indexDiff),
|
||
tempHolder;
|
||
|
||
if(beforeAnimation && diffAbs < 2) {
|
||
return;
|
||
}
|
||
|
||
|
||
self.currItem = _getItemAt( _currentItemIndex );
|
||
_renderMaxResolution = false;
|
||
|
||
_shout('beforeChange', _indexDiff);
|
||
|
||
if(diffAbs >= NUM_HOLDERS) {
|
||
_containerShiftIndex += _indexDiff + (_indexDiff > 0 ? -NUM_HOLDERS : NUM_HOLDERS);
|
||
diffAbs = NUM_HOLDERS;
|
||
}
|
||
for(var i = 0; i < diffAbs; i++) {
|
||
if(_indexDiff > 0) {
|
||
tempHolder = _itemHolders.shift();
|
||
_itemHolders[NUM_HOLDERS-1] = tempHolder; // move first to last
|
||
|
||
_containerShiftIndex++;
|
||
_setTranslateX( (_containerShiftIndex+2) * _slideSize.x, tempHolder.el.style);
|
||
self.setContent(tempHolder, _currentItemIndex - diffAbs + i + 1 + 1);
|
||
} else {
|
||
tempHolder = _itemHolders.pop();
|
||
_itemHolders.unshift( tempHolder ); // move last to first
|
||
|
||
_containerShiftIndex--;
|
||
_setTranslateX( _containerShiftIndex * _slideSize.x, tempHolder.el.style);
|
||
self.setContent(tempHolder, _currentItemIndex + diffAbs - i - 1 - 1);
|
||
}
|
||
|
||
}
|
||
|
||
// reset zoom/pan on previous item
|
||
if(_currZoomElementStyle && Math.abs(_indexDiff) === 1) {
|
||
|
||
var prevItem = _getItemAt(_prevItemIndex);
|
||
if(prevItem.initialZoomLevel !== _currZoomLevel) {
|
||
_calculateItemSize(prevItem , _viewportSize );
|
||
_setImageSize(prevItem);
|
||
_applyZoomPanToItem( prevItem );
|
||
}
|
||
|
||
}
|
||
|
||
// reset diff after update
|
||
_indexDiff = 0;
|
||
|
||
self.updateCurrZoomItem();
|
||
|
||
_prevItemIndex = _currentItemIndex;
|
||
|
||
_shout('afterChange');
|
||
|
||
},
|
||
|
||
|
||
|
||
updateSize: function(force) {
|
||
|
||
if(!_isFixedPosition && _options.modal) {
|
||
var windowScrollY = framework.getScrollY();
|
||
if(_currentWindowScrollY !== windowScrollY) {
|
||
template.style.top = windowScrollY + 'px';
|
||
_currentWindowScrollY = windowScrollY;
|
||
}
|
||
if(!force && _windowVisibleSize.x === window.innerWidth && _windowVisibleSize.y === window.innerHeight) {
|
||
return;
|
||
}
|
||
_windowVisibleSize.x = window.innerWidth;
|
||
_windowVisibleSize.y = window.innerHeight;
|
||
|
||
//template.style.width = _windowVisibleSize.x + 'px';
|
||
template.style.height = _windowVisibleSize.y + 'px';
|
||
}
|
||
|
||
|
||
|
||
_viewportSize.x = self.scrollWrap.clientWidth;
|
||
_viewportSize.y = self.scrollWrap.clientHeight;
|
||
|
||
_updatePageScrollOffset();
|
||
|
||
_slideSize.x = _viewportSize.x + Math.round(_viewportSize.x * _options.spacing);
|
||
_slideSize.y = _viewportSize.y;
|
||
|
||
_moveMainScroll(_slideSize.x * _currPositionIndex);
|
||
|
||
_shout('beforeResize'); // even may be used for example to switch image sources
|
||
|
||
|
||
// don't re-calculate size on inital size update
|
||
if(_containerShiftIndex !== undefined) {
|
||
|
||
var holder,
|
||
item,
|
||
hIndex;
|
||
|
||
for(var i = 0; i < NUM_HOLDERS; i++) {
|
||
holder = _itemHolders[i];
|
||
_setTranslateX( (i+_containerShiftIndex) * _slideSize.x, holder.el.style);
|
||
|
||
hIndex = _currentItemIndex+i-1;
|
||
|
||
if(_options.loop && _getNumItems() > 2) {
|
||
hIndex = _getLoopedId(hIndex);
|
||
}
|
||
|
||
// update zoom level on items and refresh source (if needsUpdate)
|
||
item = _getItemAt( hIndex );
|
||
|
||
// re-render gallery item if `needsUpdate`,
|
||
// or doesn't have `bounds` (entirely new slide object)
|
||
if( item && (_itemsNeedUpdate || item.needsUpdate || !item.bounds) ) {
|
||
|
||
self.cleanSlide( item );
|
||
|
||
self.setContent( holder, hIndex );
|
||
|
||
// if "center" slide
|
||
if(i === 1) {
|
||
self.currItem = item;
|
||
self.updateCurrZoomItem(true);
|
||
}
|
||
|
||
item.needsUpdate = false;
|
||
|
||
} else if(holder.index === -1 && hIndex >= 0) {
|
||
// add content first time
|
||
self.setContent( holder, hIndex );
|
||
}
|
||
if(item && item.container) {
|
||
_calculateItemSize(item, _viewportSize);
|
||
_setImageSize(item);
|
||
_applyZoomPanToItem( item );
|
||
}
|
||
|
||
}
|
||
_itemsNeedUpdate = false;
|
||
}
|
||
|
||
_startZoomLevel = _currZoomLevel = self.currItem.initialZoomLevel;
|
||
_currPanBounds = self.currItem.bounds;
|
||
|
||
if(_currPanBounds) {
|
||
_panOffset.x = _currPanBounds.center.x;
|
||
_panOffset.y = _currPanBounds.center.y;
|
||
_applyCurrentZoomPan( true );
|
||
}
|
||
|
||
_shout('resize');
|
||
},
|
||
|
||
// Zoom current item to
|
||
zoomTo: function(destZoomLevel, centerPoint, speed, easingFn, updateFn) {
|
||
/*
|
||
if(destZoomLevel === 'fit') {
|
||
destZoomLevel = self.currItem.fitRatio;
|
||
} else if(destZoomLevel === 'fill') {
|
||
destZoomLevel = self.currItem.fillRatio;
|
||
}
|
||
*/
|
||
|
||
if(centerPoint) {
|
||
_startZoomLevel = _currZoomLevel;
|
||
_midZoomPoint.x = Math.abs(centerPoint.x) - _panOffset.x ;
|
||
_midZoomPoint.y = Math.abs(centerPoint.y) - _panOffset.y ;
|
||
_equalizePoints(_startPanOffset, _panOffset);
|
||
}
|
||
|
||
var destPanBounds = _calculatePanBounds(destZoomLevel, false),
|
||
destPanOffset = {};
|
||
|
||
_modifyDestPanOffset('x', destPanBounds, destPanOffset, destZoomLevel);
|
||
_modifyDestPanOffset('y', destPanBounds, destPanOffset, destZoomLevel);
|
||
|
||
var initialZoomLevel = _currZoomLevel;
|
||
var initialPanOffset = {
|
||
x: _panOffset.x,
|
||
y: _panOffset.y
|
||
};
|
||
|
||
_roundPoint(destPanOffset);
|
||
|
||
var onUpdate = function(now) {
|
||
if(now === 1) {
|
||
_currZoomLevel = destZoomLevel;
|
||
_panOffset.x = destPanOffset.x;
|
||
_panOffset.y = destPanOffset.y;
|
||
} else {
|
||
_currZoomLevel = (destZoomLevel - initialZoomLevel) * now + initialZoomLevel;
|
||
_panOffset.x = (destPanOffset.x - initialPanOffset.x) * now + initialPanOffset.x;
|
||
_panOffset.y = (destPanOffset.y - initialPanOffset.y) * now + initialPanOffset.y;
|
||
}
|
||
|
||
if(updateFn) {
|
||
updateFn(now);
|
||
}
|
||
|
||
_applyCurrentZoomPan( now === 1 );
|
||
};
|
||
|
||
if(speed) {
|
||
_animateProp('customZoomTo', 0, 1, speed, easingFn || framework.easing.sine.inOut, onUpdate);
|
||
} else {
|
||
onUpdate(1);
|
||
}
|
||
}
|
||
|
||
|
||
};
|
||
|
||
|
||
/*>>core*/
|
||
|
||
/*>>gestures*/
|
||
/**
|
||
* Mouse/touch/pointer event handlers.
|
||
*
|
||
* separated from @core.js for readability
|
||
*/
|
||
|
||
var MIN_SWIPE_DISTANCE = 30,
|
||
DIRECTION_CHECK_OFFSET = 10; // amount of pixels to drag to determine direction of swipe
|
||
|
||
var _gestureStartTime,
|
||
_gestureCheckSpeedTime,
|
||
|
||
// pool of objects that are used during dragging of zooming
|
||
p = {}, // first point
|
||
p2 = {}, // second point (for zoom gesture)
|
||
delta = {},
|
||
_currPoint = {},
|
||
_startPoint = {},
|
||
_currPointers = [],
|
||
_startMainScrollPos = {},
|
||
_releaseAnimData,
|
||
_posPoints = [], // array of points during dragging, used to determine type of gesture
|
||
_tempPoint = {},
|
||
|
||
_isZoomingIn,
|
||
_verticalDragInitiated,
|
||
_oldAndroidTouchEndTimeout,
|
||
_currZoomedItemIndex = 0,
|
||
_centerPoint = _getEmptyPoint(),
|
||
_lastReleaseTime = 0,
|
||
_isDragging, // at least one pointer is down
|
||
_isMultitouch, // at least two _pointers are down
|
||
_zoomStarted, // zoom level changed during zoom gesture
|
||
_moved,
|
||
_dragAnimFrame,
|
||
_mainScrollShifted,
|
||
_currentPoints, // array of current touch points
|
||
_isZooming,
|
||
_currPointsDistance,
|
||
_startPointsDistance,
|
||
_currPanBounds,
|
||
_mainScrollPos = _getEmptyPoint(),
|
||
_currZoomElementStyle,
|
||
_mainScrollAnimating, // true, if animation after swipe gesture is running
|
||
_midZoomPoint = _getEmptyPoint(),
|
||
_currCenterPoint = _getEmptyPoint(),
|
||
_direction,
|
||
_isFirstMove,
|
||
_opacityChanged,
|
||
_bgOpacity,
|
||
_wasOverInitialZoom,
|
||
|
||
_isEqualPoints = function(p1, p2) {
|
||
return p1.x === p2.x && p1.y === p2.y;
|
||
},
|
||
_isNearbyPoints = function(touch0, touch1) {
|
||
return Math.abs(touch0.x - touch1.x) < DOUBLE_TAP_RADIUS && Math.abs(touch0.y - touch1.y) < DOUBLE_TAP_RADIUS;
|
||
},
|
||
_calculatePointsDistance = function(p1, p2) {
|
||
_tempPoint.x = Math.abs( p1.x - p2.x );
|
||
_tempPoint.y = Math.abs( p1.y - p2.y );
|
||
return Math.sqrt(_tempPoint.x * _tempPoint.x + _tempPoint.y * _tempPoint.y);
|
||
},
|
||
_stopDragUpdateLoop = function() {
|
||
if(_dragAnimFrame) {
|
||
_cancelAF(_dragAnimFrame);
|
||
_dragAnimFrame = null;
|
||
}
|
||
},
|
||
_dragUpdateLoop = function() {
|
||
if(_isDragging) {
|
||
_dragAnimFrame = _requestAF(_dragUpdateLoop);
|
||
_renderMovement();
|
||
}
|
||
},
|
||
_canPan = function() {
|
||
return !(_options.scaleMode === 'fit' && _currZoomLevel === self.currItem.initialZoomLevel);
|
||
},
|
||
|
||
// find the closest parent DOM element
|
||
_closestElement = function(el, fn) {
|
||
if(!el || el === document) {
|
||
return false;
|
||
}
|
||
|
||
// don't search elements above pswp__scroll-wrap
|
||
if(el.getAttribute('class') && el.getAttribute('class').indexOf('pswp__scroll-wrap') > -1 ) {
|
||
return false;
|
||
}
|
||
|
||
if( fn(el) ) {
|
||
return el;
|
||
}
|
||
|
||
return _closestElement(el.parentNode, fn);
|
||
},
|
||
|
||
_preventObj = {},
|
||
_preventDefaultEventBehaviour = function(e, isDown) {
|
||
_preventObj.prevent = !_closestElement(e.target, _options.isClickableElement);
|
||
|
||
_shout('preventDragEvent', e, isDown, _preventObj);
|
||
return _preventObj.prevent;
|
||
|
||
},
|
||
_convertTouchToPoint = function(touch, p) {
|
||
p.x = touch.pageX;
|
||
p.y = touch.pageY;
|
||
p.id = touch.identifier;
|
||
return p;
|
||
},
|
||
_findCenterOfPoints = function(p1, p2, pCenter) {
|
||
pCenter.x = (p1.x + p2.x) * 0.5;
|
||
pCenter.y = (p1.y + p2.y) * 0.5;
|
||
},
|
||
_pushPosPoint = function(time, x, y) {
|
||
if(time - _gestureCheckSpeedTime > 50) {
|
||
var o = _posPoints.length > 2 ? _posPoints.shift() : {};
|
||
o.x = x;
|
||
o.y = y;
|
||
_posPoints.push(o);
|
||
_gestureCheckSpeedTime = time;
|
||
}
|
||
},
|
||
|
||
_calculateVerticalDragOpacityRatio = function() {
|
||
var yOffset = _panOffset.y - self.currItem.initialPosition.y; // difference between initial and current position
|
||
return 1 - Math.abs( yOffset / (_viewportSize.y / 2) );
|
||
},
|
||
|
||
|
||
// points pool, reused during touch events
|
||
_ePoint1 = {},
|
||
_ePoint2 = {},
|
||
_tempPointsArr = [],
|
||
_tempCounter,
|
||
_getTouchPoints = function(e) {
|
||
// clean up previous points, without recreating array
|
||
while(_tempPointsArr.length > 0) {
|
||
_tempPointsArr.pop();
|
||
}
|
||
|
||
if(!_pointerEventEnabled) {
|
||
if(e.type.indexOf('touch') > -1) {
|
||
|
||
if(e.touches && e.touches.length > 0) {
|
||
_tempPointsArr[0] = _convertTouchToPoint(e.touches[0], _ePoint1);
|
||
if(e.touches.length > 1) {
|
||
_tempPointsArr[1] = _convertTouchToPoint(e.touches[1], _ePoint2);
|
||
}
|
||
}
|
||
|
||
} else {
|
||
_ePoint1.x = e.pageX;
|
||
_ePoint1.y = e.pageY;
|
||
_ePoint1.id = '';
|
||
_tempPointsArr[0] = _ePoint1;//_ePoint1;
|
||
}
|
||
} else {
|
||
_tempCounter = 0;
|
||
// we can use forEach, as pointer events are supported only in modern browsers
|
||
_currPointers.forEach(function(p) {
|
||
if(_tempCounter === 0) {
|
||
_tempPointsArr[0] = p;
|
||
} else if(_tempCounter === 1) {
|
||
_tempPointsArr[1] = p;
|
||
}
|
||
_tempCounter++;
|
||
|
||
});
|
||
}
|
||
return _tempPointsArr;
|
||
},
|
||
|
||
_panOrMoveMainScroll = function(axis, delta) {
|
||
|
||
var panFriction,
|
||
overDiff = 0,
|
||
newOffset = _panOffset[axis] + delta[axis],
|
||
startOverDiff,
|
||
dir = delta[axis] > 0,
|
||
newMainScrollPosition = _mainScrollPos.x + delta.x,
|
||
mainScrollDiff = _mainScrollPos.x - _startMainScrollPos.x,
|
||
newPanPos,
|
||
newMainScrollPos;
|
||
|
||
// calculate fdistance over the bounds and friction
|
||
if(newOffset > _currPanBounds.min[axis] || newOffset < _currPanBounds.max[axis]) {
|
||
panFriction = _options.panEndFriction;
|
||
// Linear increasing of friction, so at 1/4 of viewport it's at max value.
|
||
// Looks not as nice as was expected. Left for history.
|
||
// panFriction = (1 - (_panOffset[axis] + delta[axis] + panBounds.min[axis]) / (_viewportSize[axis] / 4) );
|
||
} else {
|
||
panFriction = 1;
|
||
}
|
||
|
||
newOffset = _panOffset[axis] + delta[axis] * panFriction;
|
||
|
||
// move main scroll or start panning
|
||
if(_options.allowPanToNext || _currZoomLevel === self.currItem.initialZoomLevel) {
|
||
|
||
|
||
if(!_currZoomElementStyle) {
|
||
|
||
newMainScrollPos = newMainScrollPosition;
|
||
|
||
} else if(_direction === 'h' && axis === 'x' && !_zoomStarted ) {
|
||
|
||
if(dir) {
|
||
if(newOffset > _currPanBounds.min[axis]) {
|
||
panFriction = _options.panEndFriction;
|
||
overDiff = _currPanBounds.min[axis] - newOffset;
|
||
startOverDiff = _currPanBounds.min[axis] - _startPanOffset[axis];
|
||
}
|
||
|
||
// drag right
|
||
if( (startOverDiff <= 0 || mainScrollDiff < 0) && _getNumItems() > 1 ) {
|
||
newMainScrollPos = newMainScrollPosition;
|
||
if(mainScrollDiff < 0 && newMainScrollPosition > _startMainScrollPos.x) {
|
||
newMainScrollPos = _startMainScrollPos.x;
|
||
}
|
||
} else {
|
||
if(_currPanBounds.min.x !== _currPanBounds.max.x) {
|
||
newPanPos = newOffset;
|
||
}
|
||
|
||
}
|
||
|
||
} else {
|
||
|
||
if(newOffset < _currPanBounds.max[axis] ) {
|
||
panFriction =_options.panEndFriction;
|
||
overDiff = newOffset - _currPanBounds.max[axis];
|
||
startOverDiff = _startPanOffset[axis] - _currPanBounds.max[axis];
|
||
}
|
||
|
||
if( (startOverDiff <= 0 || mainScrollDiff > 0) && _getNumItems() > 1 ) {
|
||
newMainScrollPos = newMainScrollPosition;
|
||
|
||
if(mainScrollDiff > 0 && newMainScrollPosition < _startMainScrollPos.x) {
|
||
newMainScrollPos = _startMainScrollPos.x;
|
||
}
|
||
|
||
} else {
|
||
if(_currPanBounds.min.x !== _currPanBounds.max.x) {
|
||
newPanPos = newOffset;
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
|
||
//
|
||
}
|
||
|
||
if(axis === 'x') {
|
||
|
||
if(newMainScrollPos !== undefined) {
|
||
_moveMainScroll(newMainScrollPos, true);
|
||
if(newMainScrollPos === _startMainScrollPos.x) {
|
||
_mainScrollShifted = false;
|
||
} else {
|
||
_mainScrollShifted = true;
|
||
}
|
||
}
|
||
|
||
if(_currPanBounds.min.x !== _currPanBounds.max.x) {
|
||
if(newPanPos !== undefined) {
|
||
_panOffset.x = newPanPos;
|
||
} else if(!_mainScrollShifted) {
|
||
_panOffset.x += delta.x * panFriction;
|
||
}
|
||
}
|
||
|
||
return newMainScrollPos !== undefined;
|
||
}
|
||
|
||
}
|
||
|
||
if(!_mainScrollAnimating) {
|
||
|
||
if(!_mainScrollShifted) {
|
||
if(_currZoomLevel > self.currItem.fitRatio) {
|
||
_panOffset[axis] += delta[axis] * panFriction;
|
||
|
||
}
|
||
}
|
||
|
||
|
||
}
|
||
|
||
},
|
||
|
||
// Pointerdown/touchstart/mousedown handler
|
||
_onDragStart = function(e) {
|
||
|
||
// Allow dragging only via left mouse button.
|
||
// As this handler is not added in IE8 - we ignore e.which
|
||
//
|
||
// http://www.quirksmode.org/js/events_properties.html
|
||
// https://developer.mozilla.org/en-US/docs/Web/API/event.button
|
||
if(e.type === 'mousedown' && e.button > 0 ) {
|
||
return;
|
||
}
|
||
|
||
if(_initialZoomRunning) {
|
||
e.preventDefault();
|
||
return;
|
||
}
|
||
|
||
if(_oldAndroidTouchEndTimeout && e.type === 'mousedown') {
|
||
return;
|
||
}
|
||
|
||
if(_preventDefaultEventBehaviour(e, true)) {
|
||
e.preventDefault();
|
||
}
|
||
|
||
|
||
|
||
_shout('pointerDown');
|
||
|
||
if(_pointerEventEnabled) {
|
||
var pointerIndex = framework.arraySearch(_currPointers, e.pointerId, 'id');
|
||
if(pointerIndex < 0) {
|
||
pointerIndex = _currPointers.length;
|
||
}
|
||
_currPointers[pointerIndex] = {x:e.pageX, y:e.pageY, id: e.pointerId};
|
||
}
|
||
|
||
|
||
|
||
var startPointsList = _getTouchPoints(e),
|
||
numPoints = startPointsList.length;
|
||
|
||
_currentPoints = null;
|
||
|
||
_stopAllAnimations();
|
||
|
||
// init drag
|
||
if(!_isDragging || numPoints === 1) {
|
||
|
||
|
||
|
||
_isDragging = _isFirstMove = true;
|
||
framework.bind(window, _upMoveEvents, self);
|
||
|
||
_isZoomingIn =
|
||
_wasOverInitialZoom =
|
||
_opacityChanged =
|
||
_verticalDragInitiated =
|
||
_mainScrollShifted =
|
||
_moved =
|
||
_isMultitouch =
|
||
_zoomStarted = false;
|
||
|
||
_direction = null;
|
||
|
||
_shout('firstTouchStart', startPointsList);
|
||
|
||
_equalizePoints(_startPanOffset, _panOffset);
|
||
|
||
_currPanDist.x = _currPanDist.y = 0;
|
||
_equalizePoints(_currPoint, startPointsList[0]);
|
||
_equalizePoints(_startPoint, _currPoint);
|
||
|
||
//_equalizePoints(_startMainScrollPos, _mainScrollPos);
|
||
_startMainScrollPos.x = _slideSize.x * _currPositionIndex;
|
||
|
||
_posPoints = [{
|
||
x: _currPoint.x,
|
||
y: _currPoint.y
|
||
}];
|
||
|
||
_gestureCheckSpeedTime = _gestureStartTime = _getCurrentTime();
|
||
|
||
//_mainScrollAnimationEnd(true);
|
||
_calculatePanBounds( _currZoomLevel, true );
|
||
|
||
// Start rendering
|
||
_stopDragUpdateLoop();
|
||
_dragUpdateLoop();
|
||
|
||
}
|
||
|
||
// init zoom
|
||
if(!_isZooming && numPoints > 1 && !_mainScrollAnimating && !_mainScrollShifted) {
|
||
_startZoomLevel = _currZoomLevel;
|
||
_zoomStarted = false; // true if zoom changed at least once
|
||
|
||
_isZooming = _isMultitouch = true;
|
||
_currPanDist.y = _currPanDist.x = 0;
|
||
|
||
_equalizePoints(_startPanOffset, _panOffset);
|
||
|
||
_equalizePoints(p, startPointsList[0]);
|
||
_equalizePoints(p2, startPointsList[1]);
|
||
|
||
_findCenterOfPoints(p, p2, _currCenterPoint);
|
||
|
||
_midZoomPoint.x = Math.abs(_currCenterPoint.x) - _panOffset.x;
|
||
_midZoomPoint.y = Math.abs(_currCenterPoint.y) - _panOffset.y;
|
||
_currPointsDistance = _startPointsDistance = _calculatePointsDistance(p, p2);
|
||
}
|
||
|
||
|
||
},
|
||
|
||
// Pointermove/touchmove/mousemove handler
|
||
_onDragMove = function(e) {
|
||
|
||
e.preventDefault();
|
||
|
||
if(_pointerEventEnabled) {
|
||
var pointerIndex = framework.arraySearch(_currPointers, e.pointerId, 'id');
|
||
if(pointerIndex > -1) {
|
||
var p = _currPointers[pointerIndex];
|
||
p.x = e.pageX;
|
||
p.y = e.pageY;
|
||
}
|
||
}
|
||
|
||
if(_isDragging) {
|
||
var touchesList = _getTouchPoints(e);
|
||
if(!_direction && !_moved && !_isZooming) {
|
||
|
||
if(_mainScrollPos.x !== _slideSize.x * _currPositionIndex) {
|
||
// if main scroll position is shifted – direction is always horizontal
|
||
_direction = 'h';
|
||
} else {
|
||
var diff = Math.abs(touchesList[0].x - _currPoint.x) - Math.abs(touchesList[0].y - _currPoint.y);
|
||
// check the direction of movement
|
||
if(Math.abs(diff) >= DIRECTION_CHECK_OFFSET) {
|
||
_direction = diff > 0 ? 'h' : 'v';
|
||
_currentPoints = touchesList;
|
||
}
|
||
}
|
||
|
||
} else {
|
||
_currentPoints = touchesList;
|
||
}
|
||
}
|
||
},
|
||
//
|
||
_renderMovement = function() {
|
||
|
||
if(!_currentPoints) {
|
||
return;
|
||
}
|
||
|
||
var numPoints = _currentPoints.length;
|
||
|
||
if(numPoints === 0) {
|
||
return;
|
||
}
|
||
|
||
_equalizePoints(p, _currentPoints[0]);
|
||
|
||
delta.x = p.x - _currPoint.x;
|
||
delta.y = p.y - _currPoint.y;
|
||
|
||
if(_isZooming && numPoints > 1) {
|
||
// Handle behaviour for more than 1 point
|
||
|
||
_currPoint.x = p.x;
|
||
_currPoint.y = p.y;
|
||
|
||
// check if one of two points changed
|
||
if( !delta.x && !delta.y && _isEqualPoints(_currentPoints[1], p2) ) {
|
||
return;
|
||
}
|
||
|
||
_equalizePoints(p2, _currentPoints[1]);
|
||
|
||
|
||
if(!_zoomStarted) {
|
||
_zoomStarted = true;
|
||
_shout('zoomGestureStarted');
|
||
}
|
||
|
||
// Distance between two points
|
||
var pointsDistance = _calculatePointsDistance(p,p2);
|
||
|
||
var zoomLevel = _calculateZoomLevel(pointsDistance);
|
||
|
||
// slightly over the of initial zoom level
|
||
if(zoomLevel > self.currItem.initialZoomLevel + self.currItem.initialZoomLevel / 15) {
|
||
_wasOverInitialZoom = true;
|
||
}
|
||
|
||
// Apply the friction if zoom level is out of the bounds
|
||
var zoomFriction = 1,
|
||
minZoomLevel = _getMinZoomLevel(),
|
||
maxZoomLevel = _getMaxZoomLevel();
|
||
|
||
if ( zoomLevel < minZoomLevel ) {
|
||
|
||
if(_options.pinchToClose && !_wasOverInitialZoom && _startZoomLevel <= self.currItem.initialZoomLevel) {
|
||
// fade out background if zooming out
|
||
var minusDiff = minZoomLevel - zoomLevel;
|
||
var percent = 1 - minusDiff / (minZoomLevel / 1.2);
|
||
|
||
_applyBgOpacity(percent);
|
||
_shout('onPinchClose', percent);
|
||
_opacityChanged = true;
|
||
} else {
|
||
zoomFriction = (minZoomLevel - zoomLevel) / minZoomLevel;
|
||
if(zoomFriction > 1) {
|
||
zoomFriction = 1;
|
||
}
|
||
zoomLevel = minZoomLevel - zoomFriction * (minZoomLevel / 3);
|
||
}
|
||
|
||
} else if ( zoomLevel > maxZoomLevel ) {
|
||
// 1.5 - extra zoom level above the max. E.g. if max is x6, real max 6 + 1.5 = 7.5
|
||
zoomFriction = (zoomLevel - maxZoomLevel) / ( minZoomLevel * 6 );
|
||
if(zoomFriction > 1) {
|
||
zoomFriction = 1;
|
||
}
|
||
zoomLevel = maxZoomLevel + zoomFriction * minZoomLevel;
|
||
}
|
||
|
||
if(zoomFriction < 0) {
|
||
zoomFriction = 0;
|
||
}
|
||
|
||
// distance between touch points after friction is applied
|
||
_currPointsDistance = pointsDistance;
|
||
|
||
// _centerPoint - The point in the middle of two pointers
|
||
_findCenterOfPoints(p, p2, _centerPoint);
|
||
|
||
// paning with two pointers pressed
|
||
_currPanDist.x += _centerPoint.x - _currCenterPoint.x;
|
||
_currPanDist.y += _centerPoint.y - _currCenterPoint.y;
|
||
_equalizePoints(_currCenterPoint, _centerPoint);
|
||
|
||
_panOffset.x = _calculatePanOffset('x', zoomLevel);
|
||
_panOffset.y = _calculatePanOffset('y', zoomLevel);
|
||
|
||
_isZoomingIn = zoomLevel > _currZoomLevel;
|
||
_currZoomLevel = zoomLevel;
|
||
_applyCurrentZoomPan();
|
||
|
||
} else {
|
||
|
||
// handle behaviour for one point (dragging or panning)
|
||
|
||
if(!_direction) {
|
||
return;
|
||
}
|
||
|
||
if(_isFirstMove) {
|
||
_isFirstMove = false;
|
||
|
||
// subtract drag distance that was used during the detection direction
|
||
|
||
if( Math.abs(delta.x) >= DIRECTION_CHECK_OFFSET) {
|
||
delta.x -= _currentPoints[0].x - _startPoint.x;
|
||
}
|
||
|
||
if( Math.abs(delta.y) >= DIRECTION_CHECK_OFFSET) {
|
||
delta.y -= _currentPoints[0].y - _startPoint.y;
|
||
}
|
||
}
|
||
|
||
_currPoint.x = p.x;
|
||
_currPoint.y = p.y;
|
||
|
||
// do nothing if pointers position hasn't changed
|
||
if(delta.x === 0 && delta.y === 0) {
|
||
return;
|
||
}
|
||
|
||
if(_direction === 'v' && _options.closeOnVerticalDrag) {
|
||
if(!_canPan()) {
|
||
_currPanDist.y += delta.y;
|
||
_panOffset.y += delta.y;
|
||
|
||
var opacityRatio = _calculateVerticalDragOpacityRatio();
|
||
|
||
_verticalDragInitiated = true;
|
||
_shout('onVerticalDrag', opacityRatio);
|
||
|
||
_applyBgOpacity(opacityRatio);
|
||
_applyCurrentZoomPan();
|
||
return ;
|
||
}
|
||
}
|
||
|
||
_pushPosPoint(_getCurrentTime(), p.x, p.y);
|
||
|
||
_moved = true;
|
||
_currPanBounds = self.currItem.bounds;
|
||
|
||
var mainScrollChanged = _panOrMoveMainScroll('x', delta);
|
||
if(!mainScrollChanged) {
|
||
_panOrMoveMainScroll('y', delta);
|
||
|
||
_roundPoint(_panOffset);
|
||
_applyCurrentZoomPan();
|
||
}
|
||
|
||
}
|
||
|
||
},
|
||
|
||
// Pointerup/pointercancel/touchend/touchcancel/mouseup event handler
|
||
_onDragRelease = function(e) {
|
||
|
||
if(_features.isOldAndroid ) {
|
||
|
||
if(_oldAndroidTouchEndTimeout && e.type === 'mouseup') {
|
||
return;
|
||
}
|
||
|
||
// on Android (v4.1, 4.2, 4.3 & possibly older)
|
||
// ghost mousedown/up event isn't preventable via e.preventDefault,
|
||
// which causes fake mousedown event
|
||
// so we block mousedown/up for 600ms
|
||
if( e.type.indexOf('touch') > -1 ) {
|
||
clearTimeout(_oldAndroidTouchEndTimeout);
|
||
_oldAndroidTouchEndTimeout = setTimeout(function() {
|
||
_oldAndroidTouchEndTimeout = 0;
|
||
}, 600);
|
||
}
|
||
|
||
}
|
||
|
||
_shout('pointerUp');
|
||
|
||
if(_preventDefaultEventBehaviour(e, false)) {
|
||
e.preventDefault();
|
||
}
|
||
|
||
var releasePoint;
|
||
|
||
if(_pointerEventEnabled) {
|
||
var pointerIndex = framework.arraySearch(_currPointers, e.pointerId, 'id');
|
||
|
||
if(pointerIndex > -1) {
|
||
releasePoint = _currPointers.splice(pointerIndex, 1)[0];
|
||
|
||
if(navigator.pointerEnabled) {
|
||
releasePoint.type = e.pointerType || 'mouse';
|
||
} else {
|
||
var MSPOINTER_TYPES = {
|
||
4: 'mouse', // event.MSPOINTER_TYPE_MOUSE
|
||
2: 'touch', // event.MSPOINTER_TYPE_TOUCH
|
||
3: 'pen' // event.MSPOINTER_TYPE_PEN
|
||
};
|
||
releasePoint.type = MSPOINTER_TYPES[e.pointerType];
|
||
|
||
if(!releasePoint.type) {
|
||
releasePoint.type = e.pointerType || 'mouse';
|
||
}
|
||
}
|
||
|
||
}
|
||
}
|
||
|
||
var touchList = _getTouchPoints(e),
|
||
gestureType,
|
||
numPoints = touchList.length;
|
||
|
||
if(e.type === 'mouseup') {
|
||
numPoints = 0;
|
||
}
|
||
|
||
// Do nothing if there were 3 touch points or more
|
||
if(numPoints === 2) {
|
||
_currentPoints = null;
|
||
return true;
|
||
}
|
||
|
||
// if second pointer released
|
||
if(numPoints === 1) {
|
||
_equalizePoints(_startPoint, touchList[0]);
|
||
}
|
||
|
||
|
||
// pointer hasn't moved, send "tap release" point
|
||
if(numPoints === 0 && !_direction && !_mainScrollAnimating) {
|
||
if(!releasePoint) {
|
||
if(e.type === 'mouseup') {
|
||
releasePoint = {x: e.pageX, y: e.pageY, type:'mouse'};
|
||
} else if(e.changedTouches && e.changedTouches[0]) {
|
||
releasePoint = {x: e.changedTouches[0].pageX, y: e.changedTouches[0].pageY, type:'touch'};
|
||
}
|
||
}
|
||
|
||
_shout('touchRelease', e, releasePoint);
|
||
}
|
||
|
||
// Difference in time between releasing of two last touch points (zoom gesture)
|
||
var releaseTimeDiff = -1;
|
||
|
||
// Gesture completed, no pointers left
|
||
if(numPoints === 0) {
|
||
_isDragging = false;
|
||
framework.unbind(window, _upMoveEvents, self);
|
||
|
||
_stopDragUpdateLoop();
|
||
|
||
if(_isZooming) {
|
||
// Two points released at the same time
|
||
releaseTimeDiff = 0;
|
||
} else if(_lastReleaseTime !== -1) {
|
||
releaseTimeDiff = _getCurrentTime() - _lastReleaseTime;
|
||
}
|
||
}
|
||
_lastReleaseTime = numPoints === 1 ? _getCurrentTime() : -1;
|
||
|
||
if(releaseTimeDiff !== -1 && releaseTimeDiff < 150) {
|
||
gestureType = 'zoom';
|
||
} else {
|
||
gestureType = 'swipe';
|
||
}
|
||
|
||
if(_isZooming && numPoints < 2) {
|
||
_isZooming = false;
|
||
|
||
// Only second point released
|
||
if(numPoints === 1) {
|
||
gestureType = 'zoomPointerUp';
|
||
}
|
||
_shout('zoomGestureEnded');
|
||
}
|
||
|
||
_currentPoints = null;
|
||
if(!_moved && !_zoomStarted && !_mainScrollAnimating && !_verticalDragInitiated) {
|
||
// nothing to animate
|
||
return;
|
||
}
|
||
|
||
_stopAllAnimations();
|
||
|
||
|
||
if(!_releaseAnimData) {
|
||
_releaseAnimData = _initDragReleaseAnimationData();
|
||
}
|
||
|
||
_releaseAnimData.calculateSwipeSpeed('x');
|
||
|
||
|
||
if(_verticalDragInitiated) {
|
||
|
||
var opacityRatio = _calculateVerticalDragOpacityRatio();
|
||
|
||
if(opacityRatio < _options.verticalDragRange) {
|
||
self.close();
|
||
} else {
|
||
var initalPanY = _panOffset.y,
|
||
initialBgOpacity = _bgOpacity;
|
||
|
||
_animateProp('verticalDrag', 0, 1, 300, framework.easing.cubic.out, function(now) {
|
||
|
||
_panOffset.y = (self.currItem.initialPosition.y - initalPanY) * now + initalPanY;
|
||
|
||
_applyBgOpacity( (1 - initialBgOpacity) * now + initialBgOpacity );
|
||
_applyCurrentZoomPan();
|
||
});
|
||
|
||
_shout('onVerticalDrag', 1);
|
||
}
|
||
|
||
return;
|
||
}
|
||
|
||
|
||
// main scroll
|
||
if( (_mainScrollShifted || _mainScrollAnimating) && numPoints === 0) {
|
||
var itemChanged = _finishSwipeMainScrollGesture(gestureType, _releaseAnimData);
|
||
if(itemChanged) {
|
||
return;
|
||
}
|
||
gestureType = 'zoomPointerUp';
|
||
}
|
||
|
||
// prevent zoom/pan animation when main scroll animation runs
|
||
if(_mainScrollAnimating) {
|
||
return;
|
||
}
|
||
|
||
// Complete simple zoom gesture (reset zoom level if it's out of the bounds)
|
||
if(gestureType !== 'swipe') {
|
||
_completeZoomGesture();
|
||
return;
|
||
}
|
||
|
||
// Complete pan gesture if main scroll is not shifted, and it's possible to pan current image
|
||
if(!_mainScrollShifted && _currZoomLevel > self.currItem.fitRatio) {
|
||
_completePanGesture(_releaseAnimData);
|
||
}
|
||
},
|
||
|
||
|
||
// Returns object with data about gesture
|
||
// It's created only once and then reused
|
||
_initDragReleaseAnimationData = function() {
|
||
// temp local vars
|
||
var lastFlickDuration,
|
||
tempReleasePos;
|
||
|
||
// s = this
|
||
var s = {
|
||
lastFlickOffset: {},
|
||
lastFlickDist: {},
|
||
lastFlickSpeed: {},
|
||
slowDownRatio: {},
|
||
slowDownRatioReverse: {},
|
||
speedDecelerationRatio: {},
|
||
speedDecelerationRatioAbs: {},
|
||
distanceOffset: {},
|
||
backAnimDestination: {},
|
||
backAnimStarted: {},
|
||
calculateSwipeSpeed: function(axis) {
|
||
|
||
|
||
if( _posPoints.length > 1) {
|
||
lastFlickDuration = _getCurrentTime() - _gestureCheckSpeedTime + 50;
|
||
tempReleasePos = _posPoints[_posPoints.length-2][axis];
|
||
} else {
|
||
lastFlickDuration = _getCurrentTime() - _gestureStartTime; // total gesture duration
|
||
tempReleasePos = _startPoint[axis];
|
||
}
|
||
s.lastFlickOffset[axis] = _currPoint[axis] - tempReleasePos;
|
||
s.lastFlickDist[axis] = Math.abs(s.lastFlickOffset[axis]);
|
||
if(s.lastFlickDist[axis] > 20) {
|
||
s.lastFlickSpeed[axis] = s.lastFlickOffset[axis] / lastFlickDuration;
|
||
} else {
|
||
s.lastFlickSpeed[axis] = 0;
|
||
}
|
||
if( Math.abs(s.lastFlickSpeed[axis]) < 0.1 ) {
|
||
s.lastFlickSpeed[axis] = 0;
|
||
}
|
||
|
||
s.slowDownRatio[axis] = 0.95;
|
||
s.slowDownRatioReverse[axis] = 1 - s.slowDownRatio[axis];
|
||
s.speedDecelerationRatio[axis] = 1;
|
||
},
|
||
|
||
calculateOverBoundsAnimOffset: function(axis, speed) {
|
||
if(!s.backAnimStarted[axis]) {
|
||
|
||
if(_panOffset[axis] > _currPanBounds.min[axis]) {
|
||
s.backAnimDestination[axis] = _currPanBounds.min[axis];
|
||
|
||
} else if(_panOffset[axis] < _currPanBounds.max[axis]) {
|
||
s.backAnimDestination[axis] = _currPanBounds.max[axis];
|
||
}
|
||
|
||
if(s.backAnimDestination[axis] !== undefined) {
|
||
s.slowDownRatio[axis] = 0.7;
|
||
s.slowDownRatioReverse[axis] = 1 - s.slowDownRatio[axis];
|
||
if(s.speedDecelerationRatioAbs[axis] < 0.05) {
|
||
|
||
s.lastFlickSpeed[axis] = 0;
|
||
s.backAnimStarted[axis] = true;
|
||
|
||
_animateProp('bounceZoomPan'+axis,_panOffset[axis],
|
||
s.backAnimDestination[axis],
|
||
speed || 300,
|
||
framework.easing.sine.out,
|
||
function(pos) {
|
||
_panOffset[axis] = pos;
|
||
_applyCurrentZoomPan();
|
||
}
|
||
);
|
||
|
||
}
|
||
}
|
||
}
|
||
},
|
||
|
||
// Reduces the speed by slowDownRatio (per 10ms)
|
||
calculateAnimOffset: function(axis) {
|
||
if(!s.backAnimStarted[axis]) {
|
||
s.speedDecelerationRatio[axis] = s.speedDecelerationRatio[axis] * (s.slowDownRatio[axis] +
|
||
s.slowDownRatioReverse[axis] -
|
||
s.slowDownRatioReverse[axis] * s.timeDiff / 10);
|
||
|
||
s.speedDecelerationRatioAbs[axis] = Math.abs(s.lastFlickSpeed[axis] * s.speedDecelerationRatio[axis]);
|
||
s.distanceOffset[axis] = s.lastFlickSpeed[axis] * s.speedDecelerationRatio[axis] * s.timeDiff;
|
||
_panOffset[axis] += s.distanceOffset[axis];
|
||
|
||
}
|
||
},
|
||
|
||
panAnimLoop: function() {
|
||
if ( _animations.zoomPan ) {
|
||
_animations.zoomPan.raf = _requestAF(s.panAnimLoop);
|
||
|
||
s.now = _getCurrentTime();
|
||
s.timeDiff = s.now - s.lastNow;
|
||
s.lastNow = s.now;
|
||
|
||
s.calculateAnimOffset('x');
|
||
s.calculateAnimOffset('y');
|
||
|
||
_applyCurrentZoomPan();
|
||
|
||
s.calculateOverBoundsAnimOffset('x');
|
||
s.calculateOverBoundsAnimOffset('y');
|
||
|
||
|
||
if (s.speedDecelerationRatioAbs.x < 0.05 && s.speedDecelerationRatioAbs.y < 0.05) {
|
||
|
||
// round pan position
|
||
_panOffset.x = Math.round(_panOffset.x);
|
||
_panOffset.y = Math.round(_panOffset.y);
|
||
_applyCurrentZoomPan();
|
||
|
||
_stopAnimation('zoomPan');
|
||
return;
|
||
}
|
||
}
|
||
|
||
}
|
||
};
|
||
return s;
|
||
},
|
||
|
||
_completePanGesture = function(animData) {
|
||
// calculate swipe speed for Y axis (paanning)
|
||
animData.calculateSwipeSpeed('y');
|
||
|
||
_currPanBounds = self.currItem.bounds;
|
||
|
||
animData.backAnimDestination = {};
|
||
animData.backAnimStarted = {};
|
||
|
||
// Avoid acceleration animation if speed is too low
|
||
if(Math.abs(animData.lastFlickSpeed.x) <= 0.05 && Math.abs(animData.lastFlickSpeed.y) <= 0.05 ) {
|
||
animData.speedDecelerationRatioAbs.x = animData.speedDecelerationRatioAbs.y = 0;
|
||
|
||
// Run pan drag release animation. E.g. if you drag image and release finger without momentum.
|
||
animData.calculateOverBoundsAnimOffset('x');
|
||
animData.calculateOverBoundsAnimOffset('y');
|
||
return true;
|
||
}
|
||
|
||
// Animation loop that controls the acceleration after pan gesture ends
|
||
_registerStartAnimation('zoomPan');
|
||
animData.lastNow = _getCurrentTime();
|
||
animData.panAnimLoop();
|
||
},
|
||
|
||
|
||
_finishSwipeMainScrollGesture = function(gestureType, _releaseAnimData) {
|
||
var itemChanged;
|
||
if(!_mainScrollAnimating) {
|
||
_currZoomedItemIndex = _currentItemIndex;
|
||
}
|
||
|
||
|
||
|
||
var itemsDiff;
|
||
|
||
if(gestureType === 'swipe') {
|
||
var totalShiftDist = _currPoint.x - _startPoint.x,
|
||
isFastLastFlick = _releaseAnimData.lastFlickDist.x < 10;
|
||
|
||
// if container is shifted for more than MIN_SWIPE_DISTANCE,
|
||
// and last flick gesture was in right direction
|
||
if(totalShiftDist > MIN_SWIPE_DISTANCE &&
|
||
(isFastLastFlick || _releaseAnimData.lastFlickOffset.x > 20) ) {
|
||
// go to prev item
|
||
itemsDiff = -1;
|
||
} else if(totalShiftDist < -MIN_SWIPE_DISTANCE &&
|
||
(isFastLastFlick || _releaseAnimData.lastFlickOffset.x < -20) ) {
|
||
// go to next item
|
||
itemsDiff = 1;
|
||
}
|
||
}
|
||
|
||
var nextCircle;
|
||
|
||
if(itemsDiff) {
|
||
|
||
_currentItemIndex += itemsDiff;
|
||
|
||
if(_currentItemIndex < 0) {
|
||
_currentItemIndex = _options.loop ? _getNumItems()-1 : 0;
|
||
nextCircle = true;
|
||
} else if(_currentItemIndex >= _getNumItems()) {
|
||
_currentItemIndex = _options.loop ? 0 : _getNumItems()-1;
|
||
nextCircle = true;
|
||
}
|
||
|
||
if(!nextCircle || _options.loop) {
|
||
_indexDiff += itemsDiff;
|
||
_currPositionIndex -= itemsDiff;
|
||
itemChanged = true;
|
||
}
|
||
|
||
|
||
|
||
}
|
||
|
||
var animateToX = _slideSize.x * _currPositionIndex;
|
||
var animateToDist = Math.abs( animateToX - _mainScrollPos.x );
|
||
var finishAnimDuration;
|
||
|
||
|
||
if(!itemChanged && animateToX > _mainScrollPos.x !== _releaseAnimData.lastFlickSpeed.x > 0) {
|
||
// "return to current" duration, e.g. when dragging from slide 0 to -1
|
||
finishAnimDuration = 333;
|
||
} else {
|
||
finishAnimDuration = Math.abs(_releaseAnimData.lastFlickSpeed.x) > 0 ?
|
||
animateToDist / Math.abs(_releaseAnimData.lastFlickSpeed.x) :
|
||
333;
|
||
|
||
finishAnimDuration = Math.min(finishAnimDuration, 400);
|
||
finishAnimDuration = Math.max(finishAnimDuration, 250);
|
||
}
|
||
|
||
if(_currZoomedItemIndex === _currentItemIndex) {
|
||
itemChanged = false;
|
||
}
|
||
|
||
_mainScrollAnimating = true;
|
||
|
||
_shout('mainScrollAnimStart');
|
||
|
||
_animateProp('mainScroll', _mainScrollPos.x, animateToX, finishAnimDuration, framework.easing.cubic.out,
|
||
_moveMainScroll,
|
||
function() {
|
||
_stopAllAnimations();
|
||
_mainScrollAnimating = false;
|
||
_currZoomedItemIndex = -1;
|
||
|
||
if(itemChanged || _currZoomedItemIndex !== _currentItemIndex) {
|
||
self.updateCurrItem();
|
||
}
|
||
|
||
_shout('mainScrollAnimComplete');
|
||
}
|
||
);
|
||
|
||
if(itemChanged) {
|
||
self.updateCurrItem(true);
|
||
}
|
||
|
||
return itemChanged;
|
||
},
|
||
|
||
_calculateZoomLevel = function(touchesDistance) {
|
||
return 1 / _startPointsDistance * touchesDistance * _startZoomLevel;
|
||
},
|
||
|
||
// Resets zoom if it's out of bounds
|
||
_completeZoomGesture = function() {
|
||
var destZoomLevel = _currZoomLevel,
|
||
minZoomLevel = _getMinZoomLevel(),
|
||
maxZoomLevel = _getMaxZoomLevel();
|
||
|
||
if ( _currZoomLevel < minZoomLevel ) {
|
||
destZoomLevel = minZoomLevel;
|
||
} else if ( _currZoomLevel > maxZoomLevel ) {
|
||
destZoomLevel = maxZoomLevel;
|
||
}
|
||
|
||
var destOpacity = 1,
|
||
onUpdate,
|
||
initialOpacity = _bgOpacity;
|
||
|
||
if(_opacityChanged && !_isZoomingIn && !_wasOverInitialZoom && _currZoomLevel < minZoomLevel) {
|
||
//_closedByScroll = true;
|
||
self.close();
|
||
return true;
|
||
}
|
||
|
||
if(_opacityChanged) {
|
||
onUpdate = function(now) {
|
||
_applyBgOpacity( (destOpacity - initialOpacity) * now + initialOpacity );
|
||
};
|
||
}
|
||
|
||
self.zoomTo(destZoomLevel, 0, 200, framework.easing.cubic.out, onUpdate);
|
||
return true;
|
||
};
|
||
|
||
|
||
_registerModule('Gestures', {
|
||
publicMethods: {
|
||
|
||
initGestures: function() {
|
||
|
||
// helper function that builds touch/pointer/mouse events
|
||
var addEventNames = function(pref, down, move, up, cancel) {
|
||
_dragStartEvent = pref + down;
|
||
_dragMoveEvent = pref + move;
|
||
_dragEndEvent = pref + up;
|
||
if(cancel) {
|
||
_dragCancelEvent = pref + cancel;
|
||
} else {
|
||
_dragCancelEvent = '';
|
||
}
|
||
};
|
||
|
||
_pointerEventEnabled = _features.pointerEvent;
|
||
if(_pointerEventEnabled && _features.touch) {
|
||
// we don't need touch events, if browser supports pointer events
|
||
_features.touch = false;
|
||
}
|
||
|
||
if(_pointerEventEnabled) {
|
||
if(navigator.pointerEnabled) {
|
||
addEventNames('pointer', 'down', 'move', 'up', 'cancel');
|
||
} else {
|
||
// IE10 pointer events are case-sensitive
|
||
addEventNames('MSPointer', 'Down', 'Move', 'Up', 'Cancel');
|
||
}
|
||
} else if(_features.touch) {
|
||
addEventNames('touch', 'start', 'move', 'end', 'cancel');
|
||
_likelyTouchDevice = true;
|
||
} else {
|
||
addEventNames('mouse', 'down', 'move', 'up');
|
||
}
|
||
|
||
_upMoveEvents = _dragMoveEvent + ' ' + _dragEndEvent + ' ' + _dragCancelEvent;
|
||
_downEvents = _dragStartEvent;
|
||
|
||
if(_pointerEventEnabled && !_likelyTouchDevice) {
|
||
_likelyTouchDevice = (navigator.maxTouchPoints > 1) || (navigator.msMaxTouchPoints > 1);
|
||
}
|
||
// make variable public
|
||
self.likelyTouchDevice = _likelyTouchDevice;
|
||
|
||
_globalEventHandlers[_dragStartEvent] = _onDragStart;
|
||
_globalEventHandlers[_dragMoveEvent] = _onDragMove;
|
||
_globalEventHandlers[_dragEndEvent] = _onDragRelease; // the Kraken
|
||
|
||
if(_dragCancelEvent) {
|
||
_globalEventHandlers[_dragCancelEvent] = _globalEventHandlers[_dragEndEvent];
|
||
}
|
||
|
||
// Bind mouse events on device with detected hardware touch support, in case it supports multiple types of input.
|
||
if(_features.touch) {
|
||
_downEvents += ' mousedown';
|
||
_upMoveEvents += ' mousemove mouseup';
|
||
_globalEventHandlers.mousedown = _globalEventHandlers[_dragStartEvent];
|
||
_globalEventHandlers.mousemove = _globalEventHandlers[_dragMoveEvent];
|
||
_globalEventHandlers.mouseup = _globalEventHandlers[_dragEndEvent];
|
||
}
|
||
|
||
if(!_likelyTouchDevice) {
|
||
// don't allow pan to next slide from zoomed state on Desktop
|
||
_options.allowPanToNext = false;
|
||
}
|
||
}
|
||
|
||
}
|
||
});
|
||
|
||
|
||
/*>>gestures*/
|
||
|
||
/*>>show-hide-transition*/
|
||
/**
|
||
* show-hide-transition.js:
|
||
*
|
||
* Manages initial opening or closing transition.
|
||
*
|
||
* If you're not planning to use transition for gallery at all,
|
||
* you may set options hideAnimationDuration and showAnimationDuration to 0,
|
||
* and just delete startAnimation function.
|
||
*
|
||
*/
|
||
|
||
|
||
var _showOrHideTimeout,
|
||
_showOrHide = function(item, img, out, completeFn) {
|
||
|
||
if(_showOrHideTimeout) {
|
||
clearTimeout(_showOrHideTimeout);
|
||
}
|
||
|
||
_initialZoomRunning = true;
|
||
_initialContentSet = true;
|
||
|
||
// dimensions of small thumbnail {x:,y:,w:}.
|
||
// Height is optional, as calculated based on large image.
|
||
var thumbBounds;
|
||
if(item.initialLayout) {
|
||
thumbBounds = item.initialLayout;
|
||
item.initialLayout = null;
|
||
} else {
|
||
thumbBounds = _options.getThumbBoundsFn && _options.getThumbBoundsFn(_currentItemIndex);
|
||
}
|
||
|
||
var duration = out ? _options.hideAnimationDuration : _options.showAnimationDuration;
|
||
|
||
var onComplete = function() {
|
||
_stopAnimation('initialZoom');
|
||
if(!out) {
|
||
_applyBgOpacity(1);
|
||
if(img) {
|
||
img.style.display = 'block';
|
||
}
|
||
framework.addClass(template, 'pswp--animated-in');
|
||
_shout('initialZoom' + (out ? 'OutEnd' : 'InEnd'));
|
||
} else {
|
||
self.template.removeAttribute('style');
|
||
self.bg.removeAttribute('style');
|
||
}
|
||
|
||
if(completeFn) {
|
||
completeFn();
|
||
}
|
||
_initialZoomRunning = false;
|
||
};
|
||
|
||
// if bounds aren't provided, just open gallery without animation
|
||
if(!duration || !thumbBounds || thumbBounds.x === undefined) {
|
||
|
||
_shout('initialZoom' + (out ? 'Out' : 'In') );
|
||
|
||
_currZoomLevel = item.initialZoomLevel;
|
||
_equalizePoints(_panOffset, item.initialPosition );
|
||
_applyCurrentZoomPan();
|
||
|
||
template.style.opacity = out ? 0 : 1;
|
||
_applyBgOpacity(1);
|
||
|
||
if(duration) {
|
||
setTimeout(function() {
|
||
onComplete();
|
||
}, duration);
|
||
} else {
|
||
onComplete();
|
||
}
|
||
|
||
return;
|
||
}
|
||
|
||
var startAnimation = function() {
|
||
var closeWithRaf = _closedByScroll,
|
||
fadeEverything = !self.currItem.src || self.currItem.loadError || _options.showHideOpacity;
|
||
|
||
// apply hw-acceleration to image
|
||
if(item.miniImg) {
|
||
item.miniImg.style.webkitBackfaceVisibility = 'hidden';
|
||
}
|
||
|
||
if(!out) {
|
||
_currZoomLevel = thumbBounds.w / item.w;
|
||
_panOffset.x = thumbBounds.x;
|
||
_panOffset.y = thumbBounds.y - _initalWindowScrollY;
|
||
|
||
self[fadeEverything ? 'template' : 'bg'].style.opacity = 0.001;
|
||
_applyCurrentZoomPan();
|
||
}
|
||
|
||
_registerStartAnimation('initialZoom');
|
||
|
||
if(out && !closeWithRaf) {
|
||
framework.removeClass(template, 'pswp--animated-in');
|
||
}
|
||
|
||
if(fadeEverything) {
|
||
if(out) {
|
||
framework[ (closeWithRaf ? 'remove' : 'add') + 'Class' ](template, 'pswp--animate_opacity');
|
||
} else {
|
||
setTimeout(function() {
|
||
framework.addClass(template, 'pswp--animate_opacity');
|
||
}, 30);
|
||
}
|
||
}
|
||
|
||
_showOrHideTimeout = setTimeout(function() {
|
||
|
||
_shout('initialZoom' + (out ? 'Out' : 'In') );
|
||
|
||
|
||
if(!out) {
|
||
|
||
// "in" animation always uses CSS transitions (instead of rAF).
|
||
// CSS transition work faster here,
|
||
// as developer may also want to animate other things,
|
||
// like ui on top of sliding area, which can be animated just via CSS
|
||
|
||
_currZoomLevel = item.initialZoomLevel;
|
||
_equalizePoints(_panOffset, item.initialPosition );
|
||
_applyCurrentZoomPan();
|
||
_applyBgOpacity(1);
|
||
|
||
if(fadeEverything) {
|
||
template.style.opacity = 1;
|
||
} else {
|
||
_applyBgOpacity(1);
|
||
}
|
||
|
||
_showOrHideTimeout = setTimeout(onComplete, duration + 20);
|
||
} else {
|
||
|
||
// "out" animation uses rAF only when PhotoSwipe is closed by browser scroll, to recalculate position
|
||
var destZoomLevel = thumbBounds.w / item.w,
|
||
initialPanOffset = {
|
||
x: _panOffset.x,
|
||
y: _panOffset.y
|
||
},
|
||
initialZoomLevel = _currZoomLevel,
|
||
initalBgOpacity = _bgOpacity,
|
||
onUpdate = function(now) {
|
||
|
||
if(now === 1) {
|
||
_currZoomLevel = destZoomLevel;
|
||
_panOffset.x = thumbBounds.x;
|
||
_panOffset.y = thumbBounds.y - _currentWindowScrollY;
|
||
} else {
|
||
_currZoomLevel = (destZoomLevel - initialZoomLevel) * now + initialZoomLevel;
|
||
_panOffset.x = (thumbBounds.x - initialPanOffset.x) * now + initialPanOffset.x;
|
||
_panOffset.y = (thumbBounds.y - _currentWindowScrollY - initialPanOffset.y) * now + initialPanOffset.y;
|
||
}
|
||
|
||
_applyCurrentZoomPan();
|
||
if(fadeEverything) {
|
||
template.style.opacity = 1 - now;
|
||
} else {
|
||
_applyBgOpacity( initalBgOpacity - now * initalBgOpacity );
|
||
}
|
||
};
|
||
|
||
if(closeWithRaf) {
|
||
_animateProp('initialZoom', 0, 1, duration, framework.easing.cubic.out, onUpdate, onComplete);
|
||
} else {
|
||
onUpdate(1);
|
||
_showOrHideTimeout = setTimeout(onComplete, duration + 20);
|
||
}
|
||
}
|
||
|
||
}, out ? 25 : 90); // Main purpose of this delay is to give browser time to paint and
|
||
// create composite layers of PhotoSwipe UI parts (background, controls, caption, arrows).
|
||
// Which avoids lag at the beginning of scale transition.
|
||
};
|
||
startAnimation();
|
||
|
||
|
||
};
|
||
|
||
/*>>show-hide-transition*/
|
||
|
||
/*>>items-controller*/
|
||
/**
|
||
*
|
||
* Controller manages gallery items, their dimensions, and their content.
|
||
*
|
||
*/
|
||
|
||
var _items,
|
||
_tempPanAreaSize = {},
|
||
_imagesToAppendPool = [],
|
||
_initialContentSet,
|
||
_initialZoomRunning,
|
||
_controllerDefaultOptions = {
|
||
index: 0,
|
||
errorMsg: '<div class="pswp__error-msg"><a href="%url%" target="_blank">The image</a> could not be loaded.</div>',
|
||
forceProgressiveLoading: false, // TODO
|
||
preload: [1,1],
|
||
getNumItemsFn: function() {
|
||
return _items.length;
|
||
}
|
||
};
|
||
|
||
|
||
var _getItemAt,
|
||
_getNumItems,
|
||
_initialIsLoop,
|
||
_getZeroBounds = function() {
|
||
return {
|
||
center:{x:0,y:0},
|
||
max:{x:0,y:0},
|
||
min:{x:0,y:0}
|
||
};
|
||
},
|
||
_calculateSingleItemPanBounds = function(item, realPanElementW, realPanElementH ) {
|
||
var bounds = item.bounds;
|
||
|
||
// position of element when it's centered
|
||
bounds.center.x = Math.round((_tempPanAreaSize.x - realPanElementW) / 2);
|
||
bounds.center.y = Math.round((_tempPanAreaSize.y - realPanElementH) / 2) + item.vGap.top;
|
||
|
||
// maximum pan position
|
||
bounds.max.x = (realPanElementW > _tempPanAreaSize.x) ?
|
||
Math.round(_tempPanAreaSize.x - realPanElementW) :
|
||
bounds.center.x;
|
||
|
||
bounds.max.y = (realPanElementH > _tempPanAreaSize.y) ?
|
||
Math.round(_tempPanAreaSize.y - realPanElementH) + item.vGap.top :
|
||
bounds.center.y;
|
||
|
||
// minimum pan position
|
||
bounds.min.x = (realPanElementW > _tempPanAreaSize.x) ? 0 : bounds.center.x;
|
||
bounds.min.y = (realPanElementH > _tempPanAreaSize.y) ? item.vGap.top : bounds.center.y;
|
||
},
|
||
_calculateItemSize = function(item, viewportSize, zoomLevel) {
|
||
|
||
if (item.src && !item.loadError) {
|
||
var isInitial = !zoomLevel;
|
||
|
||
if(isInitial) {
|
||
if(!item.vGap) {
|
||
item.vGap = {top:0,bottom:0};
|
||
}
|
||
// allows overriding vertical margin for individual items
|
||
_shout('parseVerticalMargin', item);
|
||
}
|
||
|
||
|
||
_tempPanAreaSize.x = viewportSize.x;
|
||
_tempPanAreaSize.y = viewportSize.y - item.vGap.top - item.vGap.bottom;
|
||
|
||
if (isInitial) {
|
||
var hRatio = _tempPanAreaSize.x / item.w;
|
||
var vRatio = _tempPanAreaSize.y / item.h;
|
||
|
||
item.fitRatio = hRatio < vRatio ? hRatio : vRatio;
|
||
//item.fillRatio = hRatio > vRatio ? hRatio : vRatio;
|
||
|
||
var scaleMode = _options.scaleMode;
|
||
|
||
if (scaleMode === 'orig') {
|
||
zoomLevel = 1;
|
||
} else if (scaleMode === 'fit') {
|
||
zoomLevel = item.fitRatio;
|
||
}
|
||
|
||
if (zoomLevel > 1) {
|
||
zoomLevel = 1;
|
||
}
|
||
|
||
item.initialZoomLevel = zoomLevel;
|
||
|
||
if(!item.bounds) {
|
||
// reuse bounds object
|
||
item.bounds = _getZeroBounds();
|
||
}
|
||
}
|
||
|
||
if(!zoomLevel) {
|
||
return;
|
||
}
|
||
|
||
_calculateSingleItemPanBounds(item, item.w * zoomLevel, item.h * zoomLevel);
|
||
|
||
if (isInitial && zoomLevel === item.initialZoomLevel) {
|
||
item.initialPosition = item.bounds.center;
|
||
}
|
||
|
||
return item.bounds;
|
||
} else {
|
||
item.w = item.h = 0;
|
||
item.initialZoomLevel = item.fitRatio = 1;
|
||
item.bounds = _getZeroBounds();
|
||
item.initialPosition = item.bounds.center;
|
||
|
||
// if it's not image, we return zero bounds (content is not zoomable)
|
||
return item.bounds;
|
||
}
|
||
|
||
},
|
||
|
||
|
||
|
||
|
||
_appendImage = function(index, item, baseDiv, img, preventAnimation, keepPlaceholder) {
|
||
|
||
|
||
if(item.loadError) {
|
||
return;
|
||
}
|
||
|
||
if(img) {
|
||
|
||
item.imageAppended = true;
|
||
_setImageSize(item, img, (item === self.currItem && _renderMaxResolution) );
|
||
|
||
baseDiv.appendChild(img);
|
||
|
||
if(keepPlaceholder) {
|
||
setTimeout(function() {
|
||
if(item && item.loaded && item.placeholder) {
|
||
item.placeholder.style.display = 'none';
|
||
item.placeholder = null;
|
||
}
|
||
}, 500);
|
||
}
|
||
}
|
||
},
|
||
|
||
|
||
|
||
_preloadImage = function(item) {
|
||
item.loading = true;
|
||
item.loaded = false;
|
||
var img = item.img = framework.createEl('pswp__img', 'img');
|
||
var onComplete = function() {
|
||
item.loading = false;
|
||
item.loaded = true;
|
||
|
||
if(item.loadComplete) {
|
||
item.loadComplete(item);
|
||
} else {
|
||
item.img = null; // no need to store image object
|
||
}
|
||
img.onload = img.onerror = null;
|
||
img = null;
|
||
};
|
||
img.onload = onComplete;
|
||
img.onerror = function() {
|
||
item.loadError = true;
|
||
onComplete();
|
||
};
|
||
|
||
img.src = item.src;// + '?a=' + Math.random();
|
||
|
||
return img;
|
||
},
|
||
_checkForError = function(item, cleanUp) {
|
||
if(item.src && item.loadError && item.container) {
|
||
|
||
if(cleanUp) {
|
||
item.container.innerHTML = '';
|
||
}
|
||
|
||
item.container.innerHTML = _options.errorMsg.replace('%url%', item.src );
|
||
return true;
|
||
|
||
}
|
||
},
|
||
_setImageSize = function(item, img, maxRes) {
|
||
if(!item.src) {
|
||
return;
|
||
}
|
||
|
||
if(!img) {
|
||
img = item.container.lastChild;
|
||
}
|
||
|
||
var w = maxRes ? item.w : Math.round(item.w * item.fitRatio),
|
||
h = maxRes ? item.h : Math.round(item.h * item.fitRatio);
|
||
|
||
if(item.placeholder && !item.loaded) {
|
||
item.placeholder.style.width = w + 'px';
|
||
item.placeholder.style.height = h + 'px';
|
||
}
|
||
|
||
img.style.width = w + 'px';
|
||
img.style.height = h + 'px';
|
||
},
|
||
_appendImagesPool = function() {
|
||
|
||
if(_imagesToAppendPool.length) {
|
||
var poolItem;
|
||
|
||
for(var i = 0; i < _imagesToAppendPool.length; i++) {
|
||
poolItem = _imagesToAppendPool[i];
|
||
if( poolItem.holder.index === poolItem.index ) {
|
||
_appendImage(poolItem.index, poolItem.item, poolItem.baseDiv, poolItem.img, false, poolItem.clearPlaceholder);
|
||
}
|
||
}
|
||
_imagesToAppendPool = [];
|
||
}
|
||
};
|
||
|
||
|
||
|
||
_registerModule('Controller', {
|
||
|
||
publicMethods: {
|
||
|
||
lazyLoadItem: function(index) {
|
||
index = _getLoopedId(index);
|
||
var item = _getItemAt(index);
|
||
|
||
if(!item || ((item.loaded || item.loading) && !_itemsNeedUpdate)) {
|
||
return;
|
||
}
|
||
|
||
_shout('gettingData', index, item);
|
||
|
||
if (!item.src) {
|
||
return;
|
||
}
|
||
|
||
_preloadImage(item);
|
||
},
|
||
initController: function() {
|
||
framework.extend(_options, _controllerDefaultOptions, true);
|
||
self.items = _items = items;
|
||
_getItemAt = self.getItemAt;
|
||
_getNumItems = _options.getNumItemsFn; //self.getNumItems;
|
||
|
||
|
||
|
||
_initialIsLoop = _options.loop;
|
||
if(_getNumItems() < 3) {
|
||
_options.loop = false; // disable loop if less then 3 items
|
||
}
|
||
|
||
_listen('beforeChange', function(diff) {
|
||
|
||
var p = _options.preload,
|
||
isNext = diff === null ? true : (diff >= 0),
|
||
preloadBefore = Math.min(p[0], _getNumItems() ),
|
||
preloadAfter = Math.min(p[1], _getNumItems() ),
|
||
i;
|
||
|
||
|
||
for(i = 1; i <= (isNext ? preloadAfter : preloadBefore); i++) {
|
||
self.lazyLoadItem(_currentItemIndex+i);
|
||
}
|
||
for(i = 1; i <= (isNext ? preloadBefore : preloadAfter); i++) {
|
||
self.lazyLoadItem(_currentItemIndex-i);
|
||
}
|
||
});
|
||
|
||
_listen('initialLayout', function() {
|
||
self.currItem.initialLayout = _options.getThumbBoundsFn && _options.getThumbBoundsFn(_currentItemIndex);
|
||
});
|
||
|
||
_listen('mainScrollAnimComplete', _appendImagesPool);
|
||
_listen('initialZoomInEnd', _appendImagesPool);
|
||
|
||
|
||
|
||
_listen('destroy', function() {
|
||
var item;
|
||
for(var i = 0; i < _items.length; i++) {
|
||
item = _items[i];
|
||
// remove reference to DOM elements, for GC
|
||
if(item.container) {
|
||
item.container = null;
|
||
}
|
||
if(item.placeholder) {
|
||
item.placeholder = null;
|
||
}
|
||
if(item.img) {
|
||
item.img = null;
|
||
}
|
||
if(item.preloader) {
|
||
item.preloader = null;
|
||
}
|
||
if(item.loadError) {
|
||
item.loaded = item.loadError = false;
|
||
}
|
||
}
|
||
_imagesToAppendPool = null;
|
||
});
|
||
},
|
||
|
||
|
||
getItemAt: function(index) {
|
||
if (index >= 0) {
|
||
return _items[index] !== undefined ? _items[index] : false;
|
||
}
|
||
return false;
|
||
},
|
||
|
||
allowProgressiveImg: function() {
|
||
// 1. Progressive image loading isn't working on webkit/blink
|
||
// when hw-acceleration (e.g. translateZ) is applied to IMG element.
|
||
// That's why in PhotoSwipe parent element gets zoom transform, not image itself.
|
||
//
|
||
// 2. Progressive image loading sometimes blinks in webkit/blink when applying animation to parent element.
|
||
// That's why it's disabled on touch devices (mainly because of swipe transition)
|
||
//
|
||
// 3. Progressive image loading sometimes doesn't work in IE (up to 11).
|
||
|
||
// Don't allow progressive loading on non-large touch devices
|
||
return _options.forceProgressiveLoading || !_likelyTouchDevice || _options.mouseUsed || screen.width > 1200;
|
||
// 1200 - to eliminate touch devices with large screen (like Chromebook Pixel)
|
||
},
|
||
|
||
setContent: function(holder, index) {
|
||
|
||
if(_options.loop) {
|
||
index = _getLoopedId(index);
|
||
}
|
||
|
||
var prevItem = self.getItemAt(holder.index);
|
||
if(prevItem) {
|
||
prevItem.container = null;
|
||
}
|
||
|
||
var item = self.getItemAt(index),
|
||
img;
|
||
|
||
if(!item) {
|
||
holder.el.innerHTML = '';
|
||
return;
|
||
}
|
||
|
||
// allow to override data
|
||
_shout('gettingData', index, item);
|
||
|
||
holder.index = index;
|
||
holder.item = item;
|
||
|
||
// base container DIV is created only once for each of 3 holders
|
||
var baseDiv = item.container = framework.createEl('pswp__zoom-wrap');
|
||
|
||
|
||
|
||
if(!item.src && item.html) {
|
||
if(item.html.tagName) {
|
||
baseDiv.appendChild(item.html);
|
||
} else {
|
||
baseDiv.innerHTML = item.html;
|
||
}
|
||
}
|
||
|
||
_checkForError(item);
|
||
|
||
_calculateItemSize(item, _viewportSize);
|
||
|
||
if(item.src && !item.loadError && !item.loaded) {
|
||
|
||
item.loadComplete = function(item) {
|
||
|
||
// gallery closed before image finished loading
|
||
if(!_isOpen) {
|
||
return;
|
||
}
|
||
|
||
// check if holder hasn't changed while image was loading
|
||
if(holder && holder.index === index ) {
|
||
if( _checkForError(item, true) ) {
|
||
item.loadComplete = item.img = null;
|
||
_calculateItemSize(item, _viewportSize);
|
||
_applyZoomPanToItem(item);
|
||
|
||
if(holder.index === _currentItemIndex) {
|
||
// recalculate dimensions
|
||
self.updateCurrZoomItem();
|
||
}
|
||
return;
|
||
}
|
||
if( !item.imageAppended ) {
|
||
if(_features.transform && (_mainScrollAnimating || _initialZoomRunning) ) {
|
||
_imagesToAppendPool.push({
|
||
item:item,
|
||
baseDiv:baseDiv,
|
||
img:item.img,
|
||
index:index,
|
||
holder:holder,
|
||
clearPlaceholder:true
|
||
});
|
||
} else {
|
||
_appendImage(index, item, baseDiv, item.img, _mainScrollAnimating || _initialZoomRunning, true);
|
||
}
|
||
} else {
|
||
// remove preloader & mini-img
|
||
if(!_initialZoomRunning && item.placeholder) {
|
||
item.placeholder.style.display = 'none';
|
||
item.placeholder = null;
|
||
}
|
||
}
|
||
}
|
||
|
||
item.loadComplete = null;
|
||
item.img = null; // no need to store image element after it's added
|
||
|
||
_shout('imageLoadComplete', index, item);
|
||
};
|
||
|
||
if(framework.features.transform) {
|
||
|
||
var placeholderClassName = 'pswp__img pswp__img--placeholder';
|
||
placeholderClassName += (item.msrc ? '' : ' pswp__img--placeholder--blank');
|
||
|
||
var placeholder = framework.createEl(placeholderClassName, item.msrc ? 'img' : '');
|
||
if(item.msrc) {
|
||
placeholder.src = item.msrc;
|
||
}
|
||
|
||
_setImageSize(item, placeholder);
|
||
|
||
baseDiv.appendChild(placeholder);
|
||
item.placeholder = placeholder;
|
||
|
||
}
|
||
|
||
|
||
|
||
|
||
if(!item.loading) {
|
||
_preloadImage(item);
|
||
}
|
||
|
||
|
||
if( self.allowProgressiveImg() ) {
|
||
// just append image
|
||
if(!_initialContentSet && _features.transform) {
|
||
_imagesToAppendPool.push({
|
||
item:item,
|
||
baseDiv:baseDiv,
|
||
img:item.img,
|
||
index:index,
|
||
holder:holder
|
||
});
|
||
} else {
|
||
_appendImage(index, item, baseDiv, item.img, true, true);
|
||
}
|
||
}
|
||
|
||
} else if(item.src && !item.loadError) {
|
||
// image object is created every time, due to bugs of image loading & delay when switching images
|
||
img = framework.createEl('pswp__img', 'img');
|
||
img.style.opacity = 1;
|
||
img.src = item.src;
|
||
_setImageSize(item, img);
|
||
_appendImage(index, item, baseDiv, img, true);
|
||
}
|
||
|
||
|
||
if(!_initialContentSet && index === _currentItemIndex) {
|
||
_currZoomElementStyle = baseDiv.style;
|
||
_showOrHide(item, (img ||item.img) );
|
||
} else {
|
||
_applyZoomPanToItem(item);
|
||
}
|
||
|
||
holder.el.innerHTML = '';
|
||
holder.el.appendChild(baseDiv);
|
||
},
|
||
|
||
cleanSlide: function( item ) {
|
||
if(item.img ) {
|
||
item.img.onload = item.img.onerror = null;
|
||
}
|
||
item.loaded = item.loading = item.img = item.imageAppended = false;
|
||
}
|
||
|
||
}
|
||
});
|
||
|
||
/*>>items-controller*/
|
||
|
||
/*>>tap*/
|
||
/**
|
||
* tap.js:
|
||
*
|
||
* Displatches tap and double-tap events.
|
||
*
|
||
*/
|
||
|
||
var tapTimer,
|
||
tapReleasePoint = {},
|
||
_dispatchTapEvent = function(origEvent, releasePoint, pointerType) {
|
||
var e = document.createEvent( 'CustomEvent' ),
|
||
eDetail = {
|
||
origEvent:origEvent,
|
||
target:origEvent.target,
|
||
releasePoint: releasePoint,
|
||
pointerType:pointerType || 'touch'
|
||
};
|
||
|
||
e.initCustomEvent( 'pswpTap', true, true, eDetail );
|
||
origEvent.target.dispatchEvent(e);
|
||
};
|
||
|
||
_registerModule('Tap', {
|
||
publicMethods: {
|
||
initTap: function() {
|
||
_listen('firstTouchStart', self.onTapStart);
|
||
_listen('touchRelease', self.onTapRelease);
|
||
_listen('destroy', function() {
|
||
tapReleasePoint = {};
|
||
tapTimer = null;
|
||
});
|
||
},
|
||
onTapStart: function(touchList) {
|
||
if(touchList.length > 1) {
|
||
clearTimeout(tapTimer);
|
||
tapTimer = null;
|
||
}
|
||
},
|
||
onTapRelease: function(e, releasePoint) {
|
||
if(!releasePoint) {
|
||
return;
|
||
}
|
||
|
||
if(!_moved && !_isMultitouch && !_numAnimations) {
|
||
var p0 = releasePoint;
|
||
if(tapTimer) {
|
||
clearTimeout(tapTimer);
|
||
tapTimer = null;
|
||
|
||
// Check if taped on the same place
|
||
if ( _isNearbyPoints(p0, tapReleasePoint) ) {
|
||
_shout('doubleTap', p0);
|
||
return;
|
||
}
|
||
}
|
||
|
||
if(releasePoint.type === 'mouse') {
|
||
_dispatchTapEvent(e, releasePoint, 'mouse');
|
||
return;
|
||
}
|
||
|
||
var clickedTagName = e.target.tagName.toUpperCase();
|
||
// avoid double tap delay on buttons and elements that have class pswp__single-tap
|
||
if(clickedTagName === 'BUTTON' || framework.hasClass(e.target, 'pswp__single-tap') ) {
|
||
_dispatchTapEvent(e, releasePoint);
|
||
return;
|
||
}
|
||
|
||
_equalizePoints(tapReleasePoint, p0);
|
||
|
||
tapTimer = setTimeout(function() {
|
||
_dispatchTapEvent(e, releasePoint);
|
||
tapTimer = null;
|
||
}, 300);
|
||
}
|
||
}
|
||
}
|
||
});
|
||
|
||
/*>>tap*/
|
||
|
||
/*>>desktop-zoom*/
|
||
/**
|
||
*
|
||
* desktop-zoom.js:
|
||
*
|
||
* - Binds mousewheel event for paning zoomed image.
|
||
* - Manages "dragging", "zoomed-in", "zoom-out" classes.
|
||
* (which are used for cursors and zoom icon)
|
||
* - Adds toggleDesktopZoom function.
|
||
*
|
||
*/
|
||
|
||
var _wheelDelta;
|
||
|
||
_registerModule('DesktopZoom', {
|
||
|
||
publicMethods: {
|
||
|
||
initDesktopZoom: function() {
|
||
|
||
if(_oldIE) {
|
||
// no zoom for old IE (<=8)
|
||
return;
|
||
}
|
||
|
||
if(_likelyTouchDevice) {
|
||
// if detected hardware touch support, we wait until mouse is used,
|
||
// and only then apply desktop-zoom features
|
||
_listen('mouseUsed', function() {
|
||
self.setupDesktopZoom();
|
||
});
|
||
} else {
|
||
self.setupDesktopZoom(true);
|
||
}
|
||
|
||
},
|
||
|
||
setupDesktopZoom: function(onInit) {
|
||
|
||
_wheelDelta = {};
|
||
|
||
var events = 'wheel mousewheel DOMMouseScroll';
|
||
|
||
_listen('bindEvents', function() {
|
||
framework.bind(template, events, self.handleMouseWheel);
|
||
});
|
||
|
||
_listen('unbindEvents', function() {
|
||
if(_wheelDelta) {
|
||
framework.unbind(template, events, self.handleMouseWheel);
|
||
}
|
||
});
|
||
|
||
self.mouseZoomedIn = false;
|
||
|
||
var hasDraggingClass,
|
||
updateZoomable = function() {
|
||
if(self.mouseZoomedIn) {
|
||
framework.removeClass(template, 'pswp--zoomed-in');
|
||
self.mouseZoomedIn = false;
|
||
}
|
||
if(_currZoomLevel < 1) {
|
||
framework.addClass(template, 'pswp--zoom-allowed');
|
||
} else {
|
||
framework.removeClass(template, 'pswp--zoom-allowed');
|
||
}
|
||
removeDraggingClass();
|
||
},
|
||
removeDraggingClass = function() {
|
||
if(hasDraggingClass) {
|
||
framework.removeClass(template, 'pswp--dragging');
|
||
hasDraggingClass = false;
|
||
}
|
||
};
|
||
|
||
_listen('resize' , updateZoomable);
|
||
_listen('afterChange' , updateZoomable);
|
||
_listen('pointerDown', function() {
|
||
if(self.mouseZoomedIn) {
|
||
hasDraggingClass = true;
|
||
framework.addClass(template, 'pswp--dragging');
|
||
}
|
||
});
|
||
_listen('pointerUp', removeDraggingClass);
|
||
|
||
if(!onInit) {
|
||
updateZoomable();
|
||
}
|
||
|
||
},
|
||
|
||
handleMouseWheel: function(e) {
|
||
|
||
if(_currZoomLevel <= self.currItem.fitRatio) {
|
||
if( _options.modal ) {
|
||
|
||
if (!_options.closeOnScroll || _numAnimations || _isDragging) {
|
||
e.preventDefault();
|
||
} else if(_transformKey && Math.abs(e.deltaY) > 2) {
|
||
// close PhotoSwipe
|
||
// if browser supports transforms & scroll changed enough
|
||
_closedByScroll = true;
|
||
self.close();
|
||
}
|
||
|
||
}
|
||
return true;
|
||
}
|
||
|
||
// allow just one event to fire
|
||
e.stopPropagation();
|
||
|
||
// https://developer.mozilla.org/en-US/docs/Web/Events/wheel
|
||
_wheelDelta.x = 0;
|
||
|
||
if('deltaX' in e) {
|
||
if(e.deltaMode === 1 /* DOM_DELTA_LINE */) {
|
||
// 18 - average line height
|
||
_wheelDelta.x = e.deltaX * 18;
|
||
_wheelDelta.y = e.deltaY * 18;
|
||
} else {
|
||
_wheelDelta.x = e.deltaX;
|
||
_wheelDelta.y = e.deltaY;
|
||
}
|
||
} else if('wheelDelta' in e) {
|
||
if(e.wheelDeltaX) {
|
||
_wheelDelta.x = -0.16 * e.wheelDeltaX;
|
||
}
|
||
if(e.wheelDeltaY) {
|
||
_wheelDelta.y = -0.16 * e.wheelDeltaY;
|
||
} else {
|
||
_wheelDelta.y = -0.16 * e.wheelDelta;
|
||
}
|
||
} else if('detail' in e) {
|
||
_wheelDelta.y = e.detail;
|
||
} else {
|
||
return;
|
||
}
|
||
|
||
_calculatePanBounds(_currZoomLevel, true);
|
||
|
||
var newPanX = _panOffset.x - _wheelDelta.x,
|
||
newPanY = _panOffset.y - _wheelDelta.y;
|
||
|
||
// only prevent scrolling in nonmodal mode when not at edges
|
||
if (_options.modal ||
|
||
(
|
||
newPanX <= _currPanBounds.min.x && newPanX >= _currPanBounds.max.x &&
|
||
newPanY <= _currPanBounds.min.y && newPanY >= _currPanBounds.max.y
|
||
) ) {
|
||
e.preventDefault();
|
||
}
|
||
|
||
// TODO: use rAF instead of mousewheel?
|
||
self.panTo(newPanX, newPanY);
|
||
},
|
||
|
||
toggleDesktopZoom: function(centerPoint) {
|
||
centerPoint = centerPoint || {x:_viewportSize.x/2 + _offset.x, y:_viewportSize.y/2 + _offset.y };
|
||
|
||
var doubleTapZoomLevel = _options.getDoubleTapZoom(true, self.currItem);
|
||
var zoomOut = _currZoomLevel === doubleTapZoomLevel;
|
||
|
||
self.mouseZoomedIn = !zoomOut;
|
||
|
||
self.zoomTo(zoomOut ? self.currItem.initialZoomLevel : doubleTapZoomLevel, centerPoint, 333);
|
||
framework[ (!zoomOut ? 'add' : 'remove') + 'Class'](template, 'pswp--zoomed-in');
|
||
}
|
||
|
||
}
|
||
});
|
||
|
||
|
||
/*>>desktop-zoom*/
|
||
|
||
/*>>history*/
|
||
/**
|
||
*
|
||
* history.js:
|
||
*
|
||
* - Back button to close gallery.
|
||
*
|
||
* - Unique URL for each slide: example.com/&pid=1&gid=3
|
||
* (where PID is picture index, and GID and gallery index)
|
||
*
|
||
* - Switch URL when slides change.
|
||
*
|
||
*/
|
||
|
||
|
||
var _historyDefaultOptions = {
|
||
history: true,
|
||
galleryUID: 1
|
||
};
|
||
|
||
var _historyUpdateTimeout,
|
||
_hashChangeTimeout,
|
||
_hashAnimCheckTimeout,
|
||
_hashChangedByScript,
|
||
_hashChangedByHistory,
|
||
_hashReseted,
|
||
_initialHash,
|
||
_historyChanged,
|
||
_closedFromURL,
|
||
_urlChangedOnce,
|
||
_windowLoc,
|
||
|
||
_supportsPushState,
|
||
|
||
_getHash = function() {
|
||
return _windowLoc.hash.substring(1);
|
||
},
|
||
_cleanHistoryTimeouts = function() {
|
||
|
||
if(_historyUpdateTimeout) {
|
||
clearTimeout(_historyUpdateTimeout);
|
||
}
|
||
|
||
if(_hashAnimCheckTimeout) {
|
||
clearTimeout(_hashAnimCheckTimeout);
|
||
}
|
||
},
|
||
|
||
// pid - Picture index
|
||
// gid - Gallery index
|
||
_parseItemIndexFromURL = function() {
|
||
var hash = _getHash(),
|
||
params = {};
|
||
|
||
if(hash.length < 5) { // pid=1
|
||
return params;
|
||
}
|
||
|
||
var i, vars = hash.split('&');
|
||
for (i = 0; i < vars.length; i++) {
|
||
if(!vars[i]) {
|
||
continue;
|
||
}
|
||
var pair = vars[i].split('=');
|
||
if(pair.length < 2) {
|
||
continue;
|
||
}
|
||
params[pair[0]] = pair[1];
|
||
}
|
||
if(_options.galleryPIDs) {
|
||
// detect custom pid in hash and search for it among the items collection
|
||
var searchfor = params.pid;
|
||
params.pid = 0; // if custom pid cannot be found, fallback to the first item
|
||
for(i = 0; i < _items.length; i++) {
|
||
if(_items[i].pid === searchfor) {
|
||
params.pid = i;
|
||
break;
|
||
}
|
||
}
|
||
} else {
|
||
params.pid = parseInt(params.pid,10)-1;
|
||
}
|
||
if( params.pid < 0 ) {
|
||
params.pid = 0;
|
||
}
|
||
return params;
|
||
},
|
||
_updateHash = function() {
|
||
|
||
if(_hashAnimCheckTimeout) {
|
||
clearTimeout(_hashAnimCheckTimeout);
|
||
}
|
||
|
||
|
||
if(_numAnimations || _isDragging) {
|
||
// changing browser URL forces layout/paint in some browsers, which causes noticable lag during animation
|
||
// that's why we update hash only when no animations running
|
||
_hashAnimCheckTimeout = setTimeout(_updateHash, 500);
|
||
return;
|
||
}
|
||
|
||
if(_hashChangedByScript) {
|
||
clearTimeout(_hashChangeTimeout);
|
||
} else {
|
||
_hashChangedByScript = true;
|
||
}
|
||
|
||
|
||
var pid = (_currentItemIndex + 1);
|
||
var item = _getItemAt( _currentItemIndex );
|
||
if(item.hasOwnProperty('pid')) {
|
||
// carry forward any custom pid assigned to the item
|
||
pid = item.pid;
|
||
}
|
||
var newHash = _initialHash + '&' + 'gid=' + _options.galleryUID + '&' + 'pid=' + pid;
|
||
|
||
if(!_historyChanged) {
|
||
if(_windowLoc.hash.indexOf(newHash) === -1) {
|
||
_urlChangedOnce = true;
|
||
}
|
||
// first time - add new hisory record, then just replace
|
||
}
|
||
|
||
var newURL = _windowLoc.href.split('#')[0] + '#' + newHash;
|
||
|
||
if( _supportsPushState ) {
|
||
|
||
if('#' + newHash !== window.location.hash) {
|
||
history[_historyChanged ? 'replaceState' : 'pushState']('', document.title, newURL);
|
||
}
|
||
|
||
} else {
|
||
if(_historyChanged) {
|
||
_windowLoc.replace( newURL );
|
||
} else {
|
||
_windowLoc.hash = newHash;
|
||
}
|
||
}
|
||
|
||
|
||
|
||
_historyChanged = true;
|
||
_hashChangeTimeout = setTimeout(function() {
|
||
_hashChangedByScript = false;
|
||
}, 60);
|
||
};
|
||
|
||
|
||
|
||
|
||
|
||
_registerModule('History', {
|
||
|
||
|
||
|
||
publicMethods: {
|
||
initHistory: function() {
|
||
|
||
framework.extend(_options, _historyDefaultOptions, true);
|
||
|
||
if( !_options.history ) {
|
||
return;
|
||
}
|
||
|
||
|
||
_windowLoc = window.location;
|
||
_urlChangedOnce = false;
|
||
_closedFromURL = false;
|
||
_historyChanged = false;
|
||
_initialHash = _getHash();
|
||
_supportsPushState = ('pushState' in history);
|
||
|
||
|
||
if(_initialHash.indexOf('gid=') > -1) {
|
||
_initialHash = _initialHash.split('&gid=')[0];
|
||
_initialHash = _initialHash.split('?gid=')[0];
|
||
}
|
||
|
||
|
||
_listen('afterChange', self.updateURL);
|
||
_listen('unbindEvents', function() {
|
||
framework.unbind(window, 'hashchange', self.onHashChange);
|
||
});
|
||
|
||
|
||
var returnToOriginal = function() {
|
||
_hashReseted = true;
|
||
if(!_closedFromURL) {
|
||
|
||
if(_urlChangedOnce) {
|
||
history.back();
|
||
} else {
|
||
|
||
if(_initialHash) {
|
||
_windowLoc.hash = _initialHash;
|
||
} else {
|
||
if (_supportsPushState) {
|
||
|
||
// remove hash from url without refreshing it or scrolling to top
|
||
history.pushState('', document.title, _windowLoc.pathname + _windowLoc.search );
|
||
} else {
|
||
_windowLoc.hash = '';
|
||
}
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
_cleanHistoryTimeouts();
|
||
};
|
||
|
||
|
||
_listen('unbindEvents', function() {
|
||
if(_closedByScroll) {
|
||
// if PhotoSwipe is closed by scroll, we go "back" before the closing animation starts
|
||
// this is done to keep the scroll position
|
||
returnToOriginal();
|
||
}
|
||
});
|
||
_listen('destroy', function() {
|
||
if(!_hashReseted) {
|
||
returnToOriginal();
|
||
}
|
||
});
|
||
_listen('firstUpdate', function() {
|
||
_currentItemIndex = _parseItemIndexFromURL().pid;
|
||
});
|
||
|
||
|
||
|
||
|
||
var index = _initialHash.indexOf('pid=');
|
||
if(index > -1) {
|
||
_initialHash = _initialHash.substring(0, index);
|
||
if(_initialHash.slice(-1) === '&') {
|
||
_initialHash = _initialHash.slice(0, -1);
|
||
}
|
||
}
|
||
|
||
|
||
setTimeout(function() {
|
||
if(_isOpen) { // hasn't destroyed yet
|
||
framework.bind(window, 'hashchange', self.onHashChange);
|
||
}
|
||
}, 40);
|
||
|
||
},
|
||
onHashChange: function() {
|
||
|
||
if(_getHash() === _initialHash) {
|
||
|
||
_closedFromURL = true;
|
||
self.close();
|
||
return;
|
||
}
|
||
if(!_hashChangedByScript) {
|
||
|
||
_hashChangedByHistory = true;
|
||
self.goTo( _parseItemIndexFromURL().pid );
|
||
_hashChangedByHistory = false;
|
||
}
|
||
|
||
},
|
||
updateURL: function() {
|
||
|
||
// Delay the update of URL, to avoid lag during transition,
|
||
// and to not to trigger actions like "refresh page sound" or "blinking favicon" to often
|
||
|
||
_cleanHistoryTimeouts();
|
||
|
||
|
||
if(_hashChangedByHistory) {
|
||
return;
|
||
}
|
||
|
||
if(!_historyChanged) {
|
||
_updateHash(); // first time
|
||
} else {
|
||
_historyUpdateTimeout = setTimeout(_updateHash, 800);
|
||
}
|
||
}
|
||
|
||
}
|
||
});
|
||
|
||
|
||
/*>>history*/
|
||
framework.extend(self, publicMethods); };
|
||
return PhotoSwipe;
|
||
}); |