785 lines
22 KiB
JavaScript
785 lines
22 KiB
JavaScript
/*! Snap.js v2.0.0-rc1 */
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(function(win, doc) {
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'use strict';
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// Our export
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var Namespace = 'Snap';
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// Our main toolbelt
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var utils = {
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/**
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* Deeply extends two objects
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* @param {Object} destination The destination object
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* @param {Object} source The custom options to extend destination by
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* @return {Object} The desination object
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*/
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extend: function(destination, source) {
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var property;
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for (property in source) {
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if (source[property] && source[property].constructor && source[property].constructor === Object) {
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destination[property] = destination[property] || {};
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utils.extend(destination[property], source[property]);
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} else {
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destination[property] = source[property];
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}
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}
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return destination;
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}
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};
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/**
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* Our Snap global that initializes our instance
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* @param {Object} opts The custom Snap.js options
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*/
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var Core = function( opts ) {
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var self = this;
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/**
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* Our default settings for a Snap instance
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* @type {Object}
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*/
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var settings = self.settings = {
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element: null,
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dragger: null,
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disable: 'none',
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addBodyClasses: true,
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hyperextensible: true,
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resistance: 0.5,
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flickThreshold: 50,
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transitionSpeed: 0.3,
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easing: 'ease',
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maxPosition: 266,
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minPosition: -266,
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tapToClose: true,
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touchToDrag: true,
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clickToDrag: true,
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slideIntent: 40, // degrees
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minDragDistance: 5
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};
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/**
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* Stores internally global data
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* @type {Object}
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*/
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var cache = self.cache = {
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isDragging: false,
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simpleStates: {
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opening: null,
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towards: null,
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hyperExtending: null,
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halfway: null,
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flick: null,
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translation: {
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absolute: 0,
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relative: 0,
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sinceDirectionChange: 0,
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percentage: 0
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}
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}
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};
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var eventList = self.eventList = {};
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utils.extend(utils, {
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/**
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* Determines if we are interacting with a touch device
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* @type {Boolean}
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*/
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hasTouch: ('ontouchstart' in doc.documentElement || win.navigator.msPointerEnabled),
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/**
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* Returns the appropriate event type based on whether we are a touch device or not
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* @param {String} action The "action" event you're looking for: up, down, move, out
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* @return {String} The browsers supported event name
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*/
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eventType: function(action) {
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var eventTypes = {
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down: (utils.hasTouch ? 'touchstart' : settings.clickToDrag ? 'mousedown' : ''),
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move: (utils.hasTouch ? 'touchmove' : settings.clickToDrag ? 'mousemove' : ''),
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up: (utils.hasTouch ? 'touchend' : settings.clickToDrag ? 'mouseup': ''),
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out: (utils.hasTouch ? 'touchcancel' : settings.clickToDrag ? 'mouseout' : '')
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};
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return eventTypes[action];
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},
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/**
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* Returns the correct "cursor" position on both browser and mobile
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* @param {String} t The coordinate to retrieve, either "X" or "Y"
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* @param {Object} e The event object being triggered
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* @return {Number} The desired coordiante for the events interaction
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*/
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page: function(t, e){
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return (utils.hasTouch && e.touches.length && e.touches[0]) ? e.touches[0]['page'+t] : e['page'+t];
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},
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klass: {
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/**
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* Checks if an element has a class name
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* @param {Object} el The element to check
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* @param {String} name The class name to search for
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* @return {Boolean} Returns true if the class exists
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*/
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has: function(el, name){
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return (el.className).indexOf(name) !== -1;
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},
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/**
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* Adds a class name to an element
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* @param {Object} el The element to add to
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* @param {String} name The class name to add
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*/
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add: function(el, name){
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if(!utils.klass.has(el, name) && settings.addBodyClasses){
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el.className += " "+name;
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}
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},
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/**
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* Removes a class name
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* @param {Object} el The element to remove from
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* @param {String} name The class name to remove
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*/
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remove: function(el, name){
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if(utils.klass.has(el, name) && settings.addBodyClasses){
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el.className = (el.className).replace(name, "").replace(/^\s+|\s+$/g, '');
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}
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}
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},
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/**
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* Dispatch a custom Snap.js event
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* @param {String} type The event name
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*/
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dispatchEvent: function(type) {
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if( typeof eventList[type] === 'function') {
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return eventList[type].apply();
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}
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},
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/**
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* Determines the browsers vendor prefix for CSS3
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* @return {String} The browsers vendor prefix
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*/
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vendor: function(){
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var tmp = doc.createElement("div"),
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prefixes = 'webkit Moz O ms'.split(' '),
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i;
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for (i in prefixes) {
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if (typeof tmp.style[prefixes[i] + 'Transition'] !== 'undefined') {
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return prefixes[i];
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}
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}
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},
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/**
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* Determines the browsers vendor prefix for transition callback events
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* @return {String} The event name
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*/
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transitionCallback: function(){
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return (cache.vendor==='Moz' || cache.vendor==='ms') ? 'transitionend' : cache.vendor+'TransitionEnd';
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},
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/**
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* Determines if the users browser supports CSS3 transformations
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* @return {[type]} [description]
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*/
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canTransform: function(){
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return typeof settings.element.style[cache.vendor+'Transform'] !== 'undefined';
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},
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/**
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* Determines an angle between two points
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* @param {Number} x The X coordinate
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* @param {Number} y The Y coordinate
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* @return {Number} The number of degrees between the two points
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*/
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angleOfDrag: function(x, y) {
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var degrees, theta;
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// Calc Theta
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theta = Math.atan2(-(cache.startDragY - y), (cache.startDragX - x));
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if (theta < 0) {
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theta += 2 * Math.PI;
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}
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// Calc Degrees
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degrees = Math.floor(theta * (180 / Math.PI) - 180);
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if (degrees < 0 && degrees > -180) {
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degrees = 360 - Math.abs(degrees);
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}
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return Math.abs(degrees);
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},
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events: {
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/**
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* Adds an event to an element
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* @param {Object} element Element to add event to
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* @param {String} eventName The event name
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* @param {Function} func Callback function
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*/
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addEvent: function addEvent(element, eventName, func) {
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if (element.addEventListener) {
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return element.addEventListener(eventName, func, false);
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} else if (element.attachEvent) {
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return element.attachEvent("on" + eventName, func);
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}
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},
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/**
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* Removes an event to an element
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* @param {Object} element Element to remove event from
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* @param {String} eventName The event name
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* @param {Function} func Callback function
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*/
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removeEvent: function addEvent(element, eventName, func) {
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if (element.addEventListener) {
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return element.removeEventListener(eventName, func, false);
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} else if (element.attachEvent) {
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return element.detachEvent("on" + eventName, func);
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}
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},
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/**
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* Prevents the default event
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* @param {Object} e The event object
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*/
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prevent: function(e) {
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if (e.preventDefault) {
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e.preventDefault();
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} else {
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e.returnValue = false;
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}
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}
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},
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/**
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* Searches the parent element until a specified attribute has been matched
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* @param {Object} el The element to search from
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* @param {String} attr The attribute to search for
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* @return {Object|null} Returns a matched element if it exists, else, null
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*/
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parentUntil: function(el, attr) {
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var isStr = typeof attr === 'string';
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while (el.parentNode) {
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if (isStr && el.getAttribute && el.getAttribute(attr)){
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return el;
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} else if(!isStr && el === attr){
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return el;
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}
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el = el.parentNode;
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}
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return null;
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}
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});
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var action = self.action = {
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/**
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* Handles translating the elements position
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* @type {Object}
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*/
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translate: {
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get: {
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/**
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* Returns the amount an element is translated
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* @param {Number} index The index desired from the CSS3 values of translate3d
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* @return {Number} The amount of pixels an element is translated
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*/
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matrix: function(index) {
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if( !cache.canTransform ){
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return parseInt(settings.element.style.left, 10);
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} else {
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var matrix = win.getComputedStyle(settings.element)[cache.vendor+'Transform'].match(/\((.*)\)/),
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ieOffset = 8;
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if (matrix) {
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matrix = matrix[1].split(',');
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// Internet Explorer likes to give us 16 fucking values
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if(matrix.length===16){
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index+=ieOffset;
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}
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return parseInt(matrix[index], 10);
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}
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return 0;
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}
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}
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},
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/**
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* Called when the element has finished transitioning
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*/
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easeCallback: function(fn){
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settings.element.style[cache.vendor+'Transition'] = '';
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cache.translation = action.translate.get.matrix(4);
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cache.easing = false;
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if(cache.easingTo===0){
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utils.klass.remove(doc.body, 'snapjs-right');
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utils.klass.remove(doc.body, 'snapjs-left');
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}
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if( cache.once ){
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cache.once.call(self, self.state());
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delete cache.once;
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}
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utils.dispatchEvent('animated');
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utils.events.removeEvent(settings.element, utils.transitionCallback(), action.translate.easeCallback);
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},
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/**
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* Animates the pane by the specified amount of pixels
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* @param {Number} n The amount of pixels to move the pane
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*/
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easeTo: function(n, cb) {
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if( !cache.canTransform ){
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cache.translation = n;
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action.translate.x(n);
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} else {
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cache.easing = true;
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cache.easingTo = n;
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settings.element.style[cache.vendor+'Transition'] = 'all ' + settings.transitionSpeed + 's ' + settings.easing;
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cache.once = cb;
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utils.events.addEvent(settings.element, utils.transitionCallback(), action.translate.easeCallback);
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action.translate.x(n);
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}
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if(n===0){
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settings.element.style[cache.vendor+'Transform'] = '';
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}
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},
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/**
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* Immediately translates the element on its X axis
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* @param {Number} n Amount of pixels to translate
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*/
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x: function(n) {
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if( (settings.disable==='left' && n>0) ||
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(settings.disable==='right' && n<0)
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){ return; }
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if( !settings.hyperextensible ){
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if( n===settings.maxPosition || n>settings.maxPosition ){
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n=settings.maxPosition;
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} else if( n===settings.minPosition || n<settings.minPosition ){
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n=settings.minPosition;
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}
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}
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n = parseInt(n, 10);
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if(isNaN(n)){
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n = 0;
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}
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if( cache.canTransform ){
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var theTranslate = 'translate3d(' + n + 'px, 0,0)';
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settings.element.style[cache.vendor+'Transform'] = theTranslate;
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} else {
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settings.element.style.width = (win.innerWidth || doc.documentElement.clientWidth)+'px';
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settings.element.style.left = n+'px';
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settings.element.style.right = '';
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}
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}
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},
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/**
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* Handles all the events that interface with dragging
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* @type {Object}
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*/
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drag: {
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/**
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* Begins listening for drag events on our element
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*/
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listen: function() {
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cache.translation = 0;
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cache.easing = false;
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utils.events.addEvent(self.settings.element, utils.eventType('down'), action.drag.startDrag);
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utils.events.addEvent(self.settings.element, utils.eventType('move'), action.drag.dragging);
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utils.events.addEvent(self.settings.element, utils.eventType('up'), action.drag.endDrag);
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},
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/**
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* Stops listening for drag events on our element
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*/
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stopListening: function() {
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utils.events.removeEvent(settings.element, utils.eventType('down'), action.drag.startDrag);
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utils.events.removeEvent(settings.element, utils.eventType('move'), action.drag.dragging);
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utils.events.removeEvent(settings.element, utils.eventType('up'), action.drag.endDrag);
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},
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/**
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* Fired immediately when the user begins to drag the content pane
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* @param {Object} e Event object
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*/
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startDrag: function(e) {
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// No drag on ignored elements
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var target = e.target ? e.target : e.srcElement,
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ignoreParent = utils.parentUntil(target, 'data-snap-ignore');
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if (ignoreParent) {
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utils.dispatchEvent('ignore');
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return;
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}
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if(settings.dragger){
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var dragParent = utils.parentUntil(target, settings.dragger);
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// Only use dragger if we're in a closed state
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if( !dragParent &&
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(cache.translation !== settings.minPosition &&
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cache.translation !== settings.maxPosition
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)){
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return;
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}
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}
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utils.dispatchEvent('start');
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settings.element.style[cache.vendor+'Transition'] = '';
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cache.isDragging = true;
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cache.intentChecked = false;
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cache.startDragX = utils.page('X', e);
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cache.startDragY = utils.page('Y', e);
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cache.dragWatchers = {
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current: 0,
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last: 0,
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hold: 0,
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state: ''
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};
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cache.simpleStates = {
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opening: null,
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towards: null,
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hyperExtending: null,
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halfway: null,
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flick: null,
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translation: {
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absolute: 0,
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relative: 0,
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sinceDirectionChange: 0,
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percentage: 0
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}
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};
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},
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/**
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* Fired while the user is moving the content pane
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* @param {Object} e Event object
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*/
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dragging: function(e) {
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if (cache.isDragging && settings.touchToDrag) {
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var thePageX = utils.page('X', e),
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thePageY = utils.page('Y', e),
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translated = cache.translation,
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absoluteTranslation = action.translate.get.matrix(4),
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whileDragX = thePageX - cache.startDragX,
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openingLeft = absoluteTranslation > 0,
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translateTo = whileDragX,
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diff;
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// Shown no intent already
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if((cache.intentChecked && !cache.hasIntent)){
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return;
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}
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if(settings.addBodyClasses){
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if((absoluteTranslation)>0){
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utils.klass.add(doc.body, 'snapjs-left');
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utils.klass.remove(doc.body, 'snapjs-right');
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} else if((absoluteTranslation)<0){
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utils.klass.add(doc.body, 'snapjs-right');
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utils.klass.remove(doc.body, 'snapjs-left');
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}
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}
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if (cache.hasIntent === false || cache.hasIntent === null) {
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var deg = utils.angleOfDrag(thePageX, thePageY),
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inRightRange = (deg >= 0 && deg <= settings.slideIntent) || (deg <= 360 && deg > (360 - settings.slideIntent)),
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inLeftRange = (deg >= 180 && deg <= (180 + settings.slideIntent)) || (deg <= 180 && deg >= (180 - settings.slideIntent));
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if (!inLeftRange && !inRightRange) {
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cache.hasIntent = false;
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} else {
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cache.hasIntent = true;
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}
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cache.intentChecked = true;
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}
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if (
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(settings.minDragDistance>=Math.abs(thePageX-cache.startDragX)) || // Has user met minimum drag distance?
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(cache.hasIntent === false)
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) {
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return;
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}
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utils.events.prevent(e);
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utils.dispatchEvent('drag');
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cache.dragWatchers.current = thePageX;
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// Determine which direction we are going
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if (cache.dragWatchers.last > thePageX) {
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if (cache.dragWatchers.state !== 'left') {
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cache.dragWatchers.state = 'left';
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cache.dragWatchers.hold = thePageX;
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}
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cache.dragWatchers.last = thePageX;
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} else if (cache.dragWatchers.last < thePageX) {
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if (cache.dragWatchers.state !== 'right') {
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cache.dragWatchers.state = 'right';
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cache.dragWatchers.hold = thePageX;
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}
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cache.dragWatchers.last = thePageX;
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}
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if (openingLeft) {
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// Pulling too far to the right
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if (settings.maxPosition < absoluteTranslation) {
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diff = (absoluteTranslation - settings.maxPosition) * settings.resistance;
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translateTo = whileDragX - diff;
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}
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cache.simpleStates = {
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opening: 'left',
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towards: cache.dragWatchers.state,
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hyperExtending: settings.maxPosition < absoluteTranslation,
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halfway: absoluteTranslation > (settings.maxPosition / 2),
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flick: Math.abs(cache.dragWatchers.current - cache.dragWatchers.hold) > settings.flickThreshold,
|
|
translation: {
|
|
absolute: absoluteTranslation,
|
|
relative: whileDragX,
|
|
sinceDirectionChange: (cache.dragWatchers.current - cache.dragWatchers.hold),
|
|
percentage: (absoluteTranslation/settings.maxPosition)*100
|
|
}
|
|
};
|
|
} else {
|
|
// Pulling too far to the left
|
|
if (settings.minPosition > absoluteTranslation) {
|
|
diff = (absoluteTranslation - settings.minPosition) * settings.resistance;
|
|
translateTo = whileDragX - diff;
|
|
}
|
|
cache.simpleStates = {
|
|
opening: 'right',
|
|
towards: cache.dragWatchers.state,
|
|
hyperExtending: settings.minPosition > absoluteTranslation,
|
|
halfway: absoluteTranslation < (settings.minPosition / 2),
|
|
flick: Math.abs(cache.dragWatchers.current - cache.dragWatchers.hold) > settings.flickThreshold,
|
|
translation: {
|
|
absolute: absoluteTranslation,
|
|
relative: whileDragX,
|
|
sinceDirectionChange: (cache.dragWatchers.current - cache.dragWatchers.hold),
|
|
percentage: (absoluteTranslation/settings.minPosition)*100
|
|
}
|
|
};
|
|
}
|
|
action.translate.x(translateTo + translated);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Fired when the user releases the content pane
|
|
* @param {Object} e Event object
|
|
*/
|
|
endDrag: function(e) {
|
|
if (cache.isDragging) {
|
|
utils.dispatchEvent('end');
|
|
var translated = action.translate.get.matrix(4);
|
|
|
|
// Tap Close
|
|
if (cache.dragWatchers.current === 0 && translated !== 0 && settings.tapToClose) {
|
|
utils.dispatchEvent('close');
|
|
utils.events.prevent(e);
|
|
action.translate.easeTo(0);
|
|
cache.isDragging = false;
|
|
cache.startDragX = 0;
|
|
return;
|
|
}
|
|
|
|
// Revealing Left
|
|
if (cache.simpleStates.opening === 'left') {
|
|
// Halfway, Flicking, or Too Far Out
|
|
if ((cache.simpleStates.halfway || cache.simpleStates.hyperExtending || cache.simpleStates.flick)) {
|
|
if (cache.simpleStates.flick && cache.simpleStates.towards === 'left') { // Flicking Closed
|
|
action.translate.easeTo(0);
|
|
} else if (
|
|
(cache.simpleStates.flick && cache.simpleStates.towards === 'right') || // Flicking Open OR
|
|
(cache.simpleStates.halfway || cache.simpleStates.hyperExtending) // At least halfway open OR hyperextending
|
|
) {
|
|
action.translate.easeTo(settings.maxPosition); // Open Left
|
|
}
|
|
} else {
|
|
action.translate.easeTo(0); // Close Left
|
|
}
|
|
// Revealing Right
|
|
} else if (cache.simpleStates.opening === 'right') {
|
|
// Halfway, Flicking, or Too Far Out
|
|
if ((cache.simpleStates.halfway || cache.simpleStates.hyperExtending || cache.simpleStates.flick)) {
|
|
if (cache.simpleStates.flick && cache.simpleStates.towards === 'right') { // Flicking Closed
|
|
action.translate.easeTo(0);
|
|
} else if (
|
|
(cache.simpleStates.flick && cache.simpleStates.towards === 'left') || // Flicking Open OR
|
|
(cache.simpleStates.halfway || cache.simpleStates.hyperExtending) // At least halfway open OR hyperextending
|
|
) {
|
|
action.translate.easeTo(settings.minPosition); // Open Right
|
|
}
|
|
} else {
|
|
action.translate.easeTo(0); // Close Right
|
|
}
|
|
}
|
|
cache.isDragging = false;
|
|
cache.startDragX = utils.page('X', e);
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
// Initialize
|
|
if (opts.element) {
|
|
utils.extend(settings, opts);
|
|
cache.vendor = utils.vendor();
|
|
cache.canTransform = utils.canTransform();
|
|
action.drag.listen();
|
|
}
|
|
};
|
|
|
|
|
|
utils.extend(Core.prototype, {
|
|
|
|
/**
|
|
* Opens the specified side menu
|
|
* @param {String} side Must be "left" or "right"
|
|
*/
|
|
open: function(side, cb) {
|
|
utils.dispatchEvent('open');
|
|
utils.klass.remove(doc.body, 'snapjs-expand-left');
|
|
utils.klass.remove(doc.body, 'snapjs-expand-right');
|
|
|
|
if (side === 'left') {
|
|
this.cache.simpleStates.opening = 'left';
|
|
this.cache.simpleStates.towards = 'right';
|
|
utils.klass.add(doc.body, 'snapjs-left');
|
|
utils.klass.remove(doc.body, 'snapjs-right');
|
|
this.action.translate.easeTo(this.settings.maxPosition, cb);
|
|
} else if (side === 'right') {
|
|
this.cache.simpleStates.opening = 'right';
|
|
this.cache.simpleStates.towards = 'left';
|
|
utils.klass.remove(doc.body, 'snapjs-left');
|
|
utils.klass.add(doc.body, 'snapjs-right');
|
|
this.action.translate.easeTo(this.settings.minPosition, cb);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Closes the pane
|
|
*/
|
|
close: function(cb) {
|
|
utils.dispatchEvent('close');
|
|
this.action.translate.easeTo(0, cb);
|
|
},
|
|
|
|
/**
|
|
* Hides the content pane completely allowing for full menu visibility
|
|
* @param {String} side Must be "left" or "right"
|
|
*/
|
|
expand: function(side){
|
|
var to = win.innerWidth || doc.documentElement.clientWidth;
|
|
|
|
if(side==='left'){
|
|
utils.dispatchEvent('expandLeft');
|
|
utils.klass.add(doc.body, 'snapjs-expand-left');
|
|
utils.klass.remove(doc.body, 'snapjs-expand-right');
|
|
} else {
|
|
utils.dispatchEvent('expandRight');
|
|
utils.klass.add(doc.body, 'snapjs-expand-right');
|
|
utils.klass.remove(doc.body, 'snapjs-expand-left');
|
|
to *= -1;
|
|
}
|
|
this.action.translate.easeTo(to);
|
|
},
|
|
|
|
/**
|
|
* Listen in to custom Snap events
|
|
* @param {String} evt The snap event name
|
|
* @param {Function} fn Callback function
|
|
* @return {Object} Snap instance
|
|
*/
|
|
on: function(evt, fn) {
|
|
this.eventList[evt] = fn;
|
|
return this;
|
|
},
|
|
|
|
/**
|
|
* Stops listening to custom Snap events
|
|
* @param {String} evt The snap event name
|
|
*/
|
|
off: function(evt) {
|
|
if (this.eventList[evt]) {
|
|
this.eventList[evt] = false;
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Enables Snap.js events
|
|
*/
|
|
enable: function() {
|
|
utils.dispatchEvent('enable');
|
|
this.action.drag.listen();
|
|
},
|
|
|
|
/**
|
|
* Disables Snap.js events
|
|
*/
|
|
disable: function() {
|
|
utils.dispatchEvent('disable');
|
|
this.action.drag.stopListening();
|
|
},
|
|
|
|
/**
|
|
* Updates the instances settings
|
|
* @param {Object} opts The Snap options to set
|
|
*/
|
|
settings: function(opts){
|
|
utils.extend(this.settings, opts);
|
|
},
|
|
|
|
/**
|
|
* Returns information about the state of the content pane
|
|
* @return {Object} Information regarding the state of the pane
|
|
*/
|
|
state: function() {
|
|
var state,
|
|
fromLeft = this.action.translate.get.matrix(4);
|
|
if (fromLeft === this.settings.maxPosition) {
|
|
state = 'left';
|
|
} else if (fromLeft === this.settings.minPosition) {
|
|
state = 'right';
|
|
} else {
|
|
state = 'closed';
|
|
}
|
|
return {
|
|
state: state,
|
|
info: this.cache.simpleStates
|
|
};
|
|
}
|
|
});
|
|
|
|
// Assign to the global namespace
|
|
this[Namespace] = Core;
|
|
|
|
}).call(this, window, document);
|