[33835] | 1 |
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| 2 | /*! Hammer.JS - v2.0.4 - 2014-09-28
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| 3 | * http://hammerjs.github.io/
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| 4 | *
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| 5 | * Copyright (c) 2014 Jorik Tangelder;
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| 6 | * Licensed under the MIT license */
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| 7 | (function(window, document, exportName, undefined) {
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| 8 | 'use strict';
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| 9 |
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| 10 | var VENDOR_PREFIXES = ['', 'webkit', 'moz', 'MS', 'ms', 'o'];
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| 11 | var TEST_ELEMENT = document.createElement('div');
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| 12 |
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| 13 | var TYPE_FUNCTION = 'function';
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| 14 |
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| 15 | var round = Math.round;
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| 16 | var abs = Math.abs;
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| 17 | var now = Date.now;
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| 18 |
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| 19 | /**
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| 20 | * set a timeout with a given scope
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| 21 | * @param {Function} fn
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| 22 | * @param {Number} timeout
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| 23 | * @param {Object} context
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| 24 | * @returns {number}
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| 25 | */
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| 26 | function setTimeoutContext(fn, timeout, context) {
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| 27 | return setTimeout(bindFn(fn, context), timeout);
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| 28 | }
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| 29 |
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| 30 | /**
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| 31 | * if the argument is an array, we want to execute the fn on each entry
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| 32 | * if it aint an array we don't want to do a thing.
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| 33 | * this is used by all the methods that accept a single and array argument.
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| 34 | * @param {*|Array} arg
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| 35 | * @param {String} fn
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| 36 | * @param {Object} [context]
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| 37 | * @returns {Boolean}
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| 38 | */
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| 39 | function invokeArrayArg(arg, fn, context) {
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| 40 | if (Array.isArray(arg)) {
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| 41 | each(arg, context[fn], context);
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| 42 | return true;
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| 43 | }
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| 44 | return false;
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| 45 | }
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| 46 |
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| 47 | /**
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| 48 | * walk objects and arrays
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| 49 | * @param {Object} obj
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| 50 | * @param {Function} iterator
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| 51 | * @param {Object} context
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| 52 | */
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| 53 | function each(obj, iterator, context) {
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| 54 | var i;
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| 55 |
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| 56 | if (!obj) {
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| 57 | return;
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| 58 | }
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| 59 |
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| 60 | if (obj.forEach) {
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| 61 | obj.forEach(iterator, context);
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| 62 | } else if (obj.length !== undefined) {
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| 63 | i = 0;
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| 64 | while (i < obj.length) {
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| 65 | iterator.call(context, obj[i], i, obj);
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| 66 | i++;
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| 67 | }
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| 68 | } else {
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| 69 | for (i in obj) {
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| 70 | obj.hasOwnProperty(i) && iterator.call(context, obj[i], i, obj);
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| 71 | }
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| 72 | }
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| 73 | }
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| 74 |
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| 75 | /**
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| 76 | * extend object.
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| 77 | * means that properties in dest will be overwritten by the ones in src.
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| 78 | * @param {Object} dest
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| 79 | * @param {Object} src
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| 80 | * @param {Boolean} [merge]
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| 81 | * @returns {Object} dest
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| 82 | */
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| 83 | function extend(dest, src, merge) {
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| 84 | var keys = Object.keys(src);
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| 85 | var i = 0;
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| 86 | while (i < keys.length) {
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| 87 | if (!merge || (merge && dest[keys[i]] === undefined)) {
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| 88 | dest[keys[i]] = src[keys[i]];
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| 89 | }
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| 90 | i++;
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| 91 | }
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| 92 | return dest;
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| 93 | }
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| 94 |
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| 95 | /**
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| 96 | * merge the values from src in the dest.
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| 97 | * means that properties that exist in dest will not be overwritten by src
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| 98 | * @param {Object} dest
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| 99 | * @param {Object} src
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| 100 | * @returns {Object} dest
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| 101 | */
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| 102 | function merge(dest, src) {
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| 103 | return extend(dest, src, true);
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| 104 | }
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| 105 |
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| 106 | /**
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| 107 | * simple class inheritance
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| 108 | * @param {Function} child
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| 109 | * @param {Function} base
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| 110 | * @param {Object} [properties]
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| 111 | */
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| 112 | function inherit(child, base, properties) {
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| 113 | var baseP = base.prototype,
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| 114 | childP;
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| 115 |
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| 116 | childP = child.prototype = Object.create(baseP);
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| 117 | childP.constructor = child;
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| 118 | childP._super = baseP;
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| 119 |
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| 120 | if (properties) {
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| 121 | extend(childP, properties);
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| 122 | }
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| 123 | }
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| 124 |
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| 125 | /**
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| 126 | * simple function bind
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| 127 | * @param {Function} fn
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| 128 | * @param {Object} context
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| 129 | * @returns {Function}
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| 130 | */
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| 131 | function bindFn(fn, context) {
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| 132 | return function boundFn() {
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| 133 | return fn.apply(context, arguments);
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| 134 | };
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| 135 | }
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| 136 |
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| 137 | /**
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| 138 | * let a boolean value also be a function that must return a boolean
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| 139 | * this first item in args will be used as the context
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| 140 | * @param {Boolean|Function} val
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| 141 | * @param {Array} [args]
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| 142 | * @returns {Boolean}
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| 143 | */
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| 144 | function boolOrFn(val, args) {
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| 145 | if (typeof val == TYPE_FUNCTION) {
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| 146 | return val.apply(args ? args[0] || undefined : undefined, args);
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| 147 | }
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| 148 | return val;
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| 149 | }
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| 150 |
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| 151 | /**
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| 152 | * use the val2 when val1 is undefined
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| 153 | * @param {*} val1
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| 154 | * @param {*} val2
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| 155 | * @returns {*}
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| 156 | */
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| 157 | function ifUndefined(val1, val2) {
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| 158 | return (val1 === undefined) ? val2 : val1;
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| 159 | }
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| 160 |
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| 161 | /**
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| 162 | * addEventListener with multiple events at once
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| 163 | * @param {EventTarget} target
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| 164 | * @param {String} types
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| 165 | * @param {Function} handler
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| 166 | */
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| 167 | function addEventListeners(target, types, handler) {
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| 168 | each(splitStr(types), function(type) {
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| 169 | target.addEventListener(type, handler, false);
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| 170 | });
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| 171 | }
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| 172 |
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| 173 | /**
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| 174 | * removeEventListener with multiple events at once
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| 175 | * @param {EventTarget} target
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| 176 | * @param {String} types
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| 177 | * @param {Function} handler
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| 178 | */
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| 179 | function removeEventListeners(target, types, handler) {
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| 180 | each(splitStr(types), function(type) {
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| 181 | target.removeEventListener(type, handler, false);
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| 182 | });
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| 183 | }
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| 184 |
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| 185 | /**
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| 186 | * find if a node is in the given parent
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| 187 | * @method hasParent
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| 188 | * @param {HTMLElement} node
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| 189 | * @param {HTMLElement} parent
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| 190 | * @return {Boolean} found
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| 191 | */
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| 192 | function hasParent(node, parent) {
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| 193 | while (node) {
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| 194 | if (node == parent) {
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| 195 | return true;
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| 196 | }
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| 197 | node = node.parentNode;
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| 198 | }
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| 199 | return false;
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| 200 | }
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| 201 |
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| 202 | /**
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| 203 | * small indexOf wrapper
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| 204 | * @param {String} str
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| 205 | * @param {String} find
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| 206 | * @returns {Boolean} found
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| 207 | */
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| 208 | function inStr(str, find) {
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| 209 | return str.indexOf(find) > -1;
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| 210 | }
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| 211 |
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| 212 | /**
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| 213 | * split string on whitespace
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| 214 | * @param {String} str
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| 215 | * @returns {Array} words
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| 216 | */
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| 217 | function splitStr(str) {
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| 218 | return str.trim().split(/\s+/g);
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| 219 | }
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| 220 |
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| 221 | /**
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| 222 | * find if a array contains the object using indexOf or a simple polyFill
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| 223 | * @param {Array} src
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| 224 | * @param {String} find
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| 225 | * @param {String} [findByKey]
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| 226 | * @return {Boolean|Number} false when not found, or the index
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| 227 | */
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| 228 | function inArray(src, find, findByKey) {
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| 229 | if (src.indexOf && !findByKey) {
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| 230 | return src.indexOf(find);
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| 231 | } else {
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| 232 | var i = 0;
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| 233 | while (i < src.length) {
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| 234 | if ((findByKey && src[i][findByKey] == find) || (!findByKey && src[i] === find)) {
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| 235 | return i;
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| 236 | }
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| 237 | i++;
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| 238 | }
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| 239 | return -1;
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| 240 | }
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| 241 | }
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| 242 |
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| 243 | /**
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| 244 | * convert array-like objects to real arrays
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| 245 | * @param {Object} obj
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| 246 | * @returns {Array}
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| 247 | */
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| 248 | function toArray(obj) {
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| 249 | return Array.prototype.slice.call(obj, 0);
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| 250 | }
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| 251 |
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| 252 | /**
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| 253 | * unique array with objects based on a key (like 'id') or just by the array's value
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| 254 | * @param {Array} src [{id:1},{id:2},{id:1}]
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| 255 | * @param {String} [key]
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| 256 | * @param {Boolean} [sort=False]
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| 257 | * @returns {Array} [{id:1},{id:2}]
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| 258 | */
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| 259 | function uniqueArray(src, key, sort) {
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| 260 | var results = [];
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| 261 | var values = [];
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| 262 | var i = 0;
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| 263 |
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| 264 | while (i < src.length) {
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| 265 | var val = key ? src[i][key] : src[i];
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| 266 | if (inArray(values, val) < 0) {
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| 267 | results.push(src[i]);
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| 268 | }
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| 269 | values[i] = val;
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| 270 | i++;
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| 271 | }
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| 272 |
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| 273 | if (sort) {
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| 274 | if (!key) {
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| 275 | results = results.sort();
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| 276 | } else {
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| 277 | results = results.sort(function sortUniqueArray(a, b) {
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| 278 | return a[key] > b[key];
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| 279 | });
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| 280 | }
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| 281 | }
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| 282 |
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| 283 | return results;
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| 284 | }
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| 285 |
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| 286 | /**
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| 287 | * get the prefixed property
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| 288 | * @param {Object} obj
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| 289 | * @param {String} property
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| 290 | * @returns {String|Undefined} prefixed
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| 291 | */
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| 292 | function prefixed(obj, property) {
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| 293 | var prefix, prop;
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| 294 | var camelProp = property[0].toUpperCase() + property.slice(1);
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| 295 |
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| 296 | var i = 0;
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| 297 | while (i < VENDOR_PREFIXES.length) {
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| 298 | prefix = VENDOR_PREFIXES[i];
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| 299 | prop = (prefix) ? prefix + camelProp : property;
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| 300 |
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| 301 | if (prop in obj) {
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| 302 | return prop;
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| 303 | }
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| 304 | i++;
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| 305 | }
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| 306 | return undefined;
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| 307 | }
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| 308 |
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| 309 | /**
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| 310 | * get a unique id
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| 311 | * @returns {number} uniqueId
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| 312 | */
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| 313 | var _uniqueId = 1;
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| 314 | function uniqueId() {
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| 315 | return _uniqueId++;
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| 316 | }
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| 317 |
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| 318 | /**
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| 319 | * get the window object of an element
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| 320 | * @param {HTMLElement} element
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| 321 | * @returns {DocumentView|Window}
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| 322 | */
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| 323 | function getWindowForElement(element) {
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| 324 | var doc = element.ownerDocument;
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| 325 | return (doc.defaultView || doc.parentWindow);
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| 326 | }
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| 327 |
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| 328 | var MOBILE_REGEX = /mobile|tablet|ip(ad|hone|od)|android/i;
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| 329 |
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| 330 | var SUPPORT_TOUCH = ('ontouchstart' in window);
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| 331 | var SUPPORT_POINTER_EVENTS = prefixed(window, 'PointerEvent') !== undefined;
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| 332 | var SUPPORT_ONLY_TOUCH = SUPPORT_TOUCH && MOBILE_REGEX.test(navigator.userAgent);
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| 333 |
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| 334 | var INPUT_TYPE_TOUCH = 'touch';
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| 335 | var INPUT_TYPE_PEN = 'pen';
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| 336 | var INPUT_TYPE_MOUSE = 'mouse';
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| 337 | var INPUT_TYPE_KINECT = 'kinect';
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| 338 |
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| 339 | var COMPUTE_INTERVAL = 25;
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| 340 |
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| 341 | var INPUT_START = 1;
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| 342 | var INPUT_MOVE = 2;
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| 343 | var INPUT_END = 4;
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| 344 | var INPUT_CANCEL = 8;
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| 345 |
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| 346 | var DIRECTION_NONE = 1;
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| 347 | var DIRECTION_LEFT = 2;
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| 348 | var DIRECTION_RIGHT = 4;
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| 349 | var DIRECTION_UP = 8;
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| 350 | var DIRECTION_DOWN = 16;
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| 351 |
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| 352 | var DIRECTION_HORIZONTAL = DIRECTION_LEFT | DIRECTION_RIGHT;
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| 353 | var DIRECTION_VERTICAL = DIRECTION_UP | DIRECTION_DOWN;
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| 354 | var DIRECTION_ALL = DIRECTION_HORIZONTAL | DIRECTION_VERTICAL;
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| 355 |
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| 356 | var PROPS_XY = ['x', 'y'];
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| 357 | var PROPS_CLIENT_XY = ['clientX', 'clientY'];
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| 358 |
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| 359 | /**
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| 360 | * create new input type manager
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| 361 | * @param {Manager} manager
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| 362 | * @param {Function} callback
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| 363 | * @returns {Input}
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| 364 | * @constructor
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| 365 | */
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| 366 | function Input(manager, callback) {
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| 367 | var self = this;
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| 368 | this.manager = manager;
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| 369 | this.callback = callback;
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| 370 | this.element = manager.element;
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| 371 | this.target = manager.options.inputTarget;
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| 372 |
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| 373 | // smaller wrapper around the handler, for the scope and the enabled state of the manager,
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| 374 | // so when disabled the input events are completely bypassed.
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| 375 | this.domHandler = function(ev) {
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| 376 | if (boolOrFn(manager.options.enable, [manager])) {
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| 377 | self.handler(ev);
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| 378 | }
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| 379 | };
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| 380 |
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| 381 | this.init();
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| 382 |
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| 383 | }
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| 384 |
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| 385 | Input.prototype = {
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| 386 | /**
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| 387 | * should handle the inputEvent data and trigger the callback
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| 388 | * @virtual
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| 389 | */
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| 390 | handler: function() { },
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| 391 |
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| 392 | /**
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| 393 | * bind the events
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| 394 | */
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| 395 | init: function() {
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| 396 | this.evEl && addEventListeners(this.element, this.evEl, this.domHandler);
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| 397 | this.evTarget && addEventListeners(this.target, this.evTarget, this.domHandler);
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| 398 | this.evWin && addEventListeners(getWindowForElement(this.element), this.evWin, this.domHandler);
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| 399 | },
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| 400 |
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| 401 | /**
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| 402 | * unbind the events
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| 403 | */
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| 404 | destroy: function() {
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| 405 | this.evEl && removeEventListeners(this.element, this.evEl, this.domHandler);
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| 406 | this.evTarget && removeEventListeners(this.target, this.evTarget, this.domHandler);
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| 407 | this.evWin && removeEventListeners(getWindowForElement(this.element), this.evWin, this.domHandler);
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| 408 | }
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| 409 | };
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| 410 |
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| 411 | /**
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| 412 | * create new input type manager
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| 413 | * called by the Manager constructor
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| 414 | * @param {Hammer} manager
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| 415 | * @returns {Input}
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| 416 | */
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| 417 | function createInputInstance(manager) {
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| 418 | var Type;
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| 419 | var inputClass = manager.options.inputClass;
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| 420 |
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| 421 | if (inputClass) {
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| 422 | Type = inputClass;
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| 423 | } else if (SUPPORT_POINTER_EVENTS) {
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| 424 | Type = PointerEventInput;
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| 425 | } else if (SUPPORT_ONLY_TOUCH) {
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| 426 | Type = TouchInput;
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| 427 | } else if (!SUPPORT_TOUCH) {
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| 428 | Type = MouseInput;
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| 429 | } else {
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| 430 | Type = TouchMouseInput;
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| 431 | }
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| 432 | return new (Type)(manager, inputHandler);
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| 433 | }
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| 434 |
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| 435 | /**
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| 436 | * handle input events
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| 437 | * @param {Manager} manager
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| 438 | * @param {String} eventType
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| 439 | * @param {Object} input
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| 440 | */
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| 441 | function inputHandler(manager, eventType, input) {
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| 442 | var pointersLen = input.pointers.length;
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| 443 | var changedPointersLen = input.changedPointers.length;
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| 444 | var isFirst = (eventType & INPUT_START && (pointersLen - changedPointersLen === 0));
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| 445 | var isFinal = (eventType & (INPUT_END | INPUT_CANCEL) && (pointersLen - changedPointersLen === 0));
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| 446 |
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| 447 | input.isFirst = !!isFirst;
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| 448 | input.isFinal = !!isFinal;
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| 449 |
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| 450 | if (isFirst) {
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| 451 | manager.session = {};
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| 452 | }
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| 453 |
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| 454 | // source event is the normalized value of the domEvents
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| 455 | // like 'touchstart, mouseup, pointerdown'
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| 456 | input.eventType = eventType;
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| 457 |
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| 458 | // compute scale, rotation etc
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| 459 | computeInputData(manager, input);
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| 460 |
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| 461 | // emit secret event
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| 462 | manager.emit('hammer.input', input);
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| 463 |
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| 464 | manager.recognize(input);
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| 465 | manager.session.prevInput = input;
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| 466 | }
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| 467 |
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| 468 | /**
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| 469 | * extend the data with some usable properties like scale, rotate, velocity etc
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| 470 | * @param {Object} manager
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| 471 | * @param {Object} input
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| 472 | */
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| 473 | function computeInputData(manager, input) {
|
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| 474 | var session = manager.session;
|
---|
| 475 | var pointers = input.pointers;
|
---|
| 476 | var pointersLength = pointers.length;
|
---|
| 477 |
|
---|
| 478 | // store the first input to calculate the distance and direction
|
---|
| 479 | if (!session.firstInput) {
|
---|
| 480 | session.firstInput = simpleCloneInputData(input);
|
---|
| 481 | }
|
---|
| 482 |
|
---|
| 483 | // to compute scale and rotation we need to store the multiple touches
|
---|
| 484 | if (pointersLength > 1 && !session.firstMultiple) {
|
---|
| 485 | session.firstMultiple = simpleCloneInputData(input);
|
---|
| 486 | } else if (pointersLength === 1) {
|
---|
| 487 | session.firstMultiple = false;
|
---|
| 488 | }
|
---|
| 489 |
|
---|
| 490 | var firstInput = session.firstInput;
|
---|
| 491 | var firstMultiple = session.firstMultiple;
|
---|
| 492 | var offsetCenter = firstMultiple ? firstMultiple.center : firstInput.center;
|
---|
| 493 |
|
---|
| 494 | var center = input.center = getCenter(pointers);
|
---|
| 495 | input.timeStamp = now();
|
---|
| 496 | input.deltaTime = input.timeStamp - firstInput.timeStamp;
|
---|
| 497 |
|
---|
| 498 | input.angle = getAngle(offsetCenter, center);
|
---|
| 499 | input.distance = getDistance(offsetCenter, center);
|
---|
| 500 |
|
---|
| 501 | computeDeltaXY(session, input);
|
---|
| 502 | input.offsetDirection = getDirection(input.deltaX, input.deltaY);
|
---|
| 503 |
|
---|
| 504 | input.scale = firstMultiple ? getScale(firstMultiple.pointers, pointers) : 1;
|
---|
| 505 | input.rotation = firstMultiple ? getRotation(firstMultiple.pointers, pointers) : 0;
|
---|
| 506 |
|
---|
| 507 | computeIntervalInputData(session, input);
|
---|
| 508 |
|
---|
| 509 | // find the correct target
|
---|
| 510 | var target = manager.element;
|
---|
| 511 | if (hasParent(input.srcEvent.target, target)) {
|
---|
| 512 | target = input.srcEvent.target;
|
---|
| 513 | }
|
---|
| 514 | input.target = target;
|
---|
| 515 | }
|
---|
| 516 |
|
---|
| 517 | function computeDeltaXY(session, input) {
|
---|
| 518 | var center = input.center;
|
---|
| 519 | var offset = session.offsetDelta || {};
|
---|
| 520 | var prevDelta = session.prevDelta || {};
|
---|
| 521 | var prevInput = session.prevInput || {};
|
---|
| 522 |
|
---|
| 523 | if (input.eventType === INPUT_START || prevInput.eventType === INPUT_END) {
|
---|
| 524 | prevDelta = session.prevDelta = {
|
---|
| 525 | x: prevInput.deltaX || 0,
|
---|
| 526 | y: prevInput.deltaY || 0
|
---|
| 527 | };
|
---|
| 528 |
|
---|
| 529 | offset = session.offsetDelta = {
|
---|
| 530 | x: center.x,
|
---|
| 531 | y: center.y
|
---|
| 532 | };
|
---|
| 533 | }
|
---|
| 534 |
|
---|
| 535 | input.deltaX = prevDelta.x + (center.x - offset.x);
|
---|
| 536 | input.deltaY = prevDelta.y + (center.y - offset.y);
|
---|
| 537 | }
|
---|
| 538 |
|
---|
| 539 | /**
|
---|
| 540 | * velocity is calculated every x ms
|
---|
| 541 | * @param {Object} session
|
---|
| 542 | * @param {Object} input
|
---|
| 543 | */
|
---|
| 544 | function computeIntervalInputData(session, input) {
|
---|
| 545 | var last = session.lastInterval || input,
|
---|
| 546 | deltaTime = input.timeStamp - last.timeStamp,
|
---|
| 547 | velocity, velocityX, velocityY, direction;
|
---|
| 548 |
|
---|
| 549 | if (input.eventType != INPUT_CANCEL && (deltaTime > COMPUTE_INTERVAL || last.velocity === undefined)) {
|
---|
| 550 | var deltaX = last.deltaX - input.deltaX;
|
---|
| 551 | var deltaY = last.deltaY - input.deltaY;
|
---|
| 552 |
|
---|
| 553 | var v = getVelocity(deltaTime, deltaX, deltaY);
|
---|
| 554 | velocityX = v.x;
|
---|
| 555 | velocityY = v.y;
|
---|
| 556 | velocity = (abs(v.x) > abs(v.y)) ? v.x : v.y;
|
---|
| 557 | direction = getDirection(deltaX, deltaY);
|
---|
| 558 |
|
---|
| 559 | session.lastInterval = input;
|
---|
| 560 | } else {
|
---|
| 561 | // use latest velocity info if it doesn't overtake a minimum period
|
---|
| 562 | velocity = last.velocity;
|
---|
| 563 | velocityX = last.velocityX;
|
---|
| 564 | velocityY = last.velocityY;
|
---|
| 565 | direction = last.direction;
|
---|
| 566 | }
|
---|
| 567 |
|
---|
| 568 | input.velocity = velocity;
|
---|
| 569 | input.velocityX = velocityX;
|
---|
| 570 | input.velocityY = velocityY;
|
---|
| 571 | input.direction = direction;
|
---|
| 572 | }
|
---|
| 573 |
|
---|
| 574 | /**
|
---|
| 575 | * create a simple clone from the input used for storage of firstInput and firstMultiple
|
---|
| 576 | * @param {Object} input
|
---|
| 577 | * @returns {Object} clonedInputData
|
---|
| 578 | */
|
---|
| 579 | function simpleCloneInputData(input) {
|
---|
| 580 | // make a simple copy of the pointers because we will get a reference if we don't
|
---|
| 581 | // we only need clientXY for the calculations
|
---|
| 582 | var pointers = [];
|
---|
| 583 | var i = 0;
|
---|
| 584 | while (i < input.pointers.length) {
|
---|
| 585 | pointers[i] = {
|
---|
| 586 | clientX: round(input.pointers[i].clientX),
|
---|
| 587 | clientY: round(input.pointers[i].clientY)
|
---|
| 588 | };
|
---|
| 589 | i++;
|
---|
| 590 | }
|
---|
| 591 |
|
---|
| 592 | return {
|
---|
| 593 | timeStamp: now(),
|
---|
| 594 | pointers: pointers,
|
---|
| 595 | center: getCenter(pointers),
|
---|
| 596 | deltaX: input.deltaX,
|
---|
| 597 | deltaY: input.deltaY
|
---|
| 598 | };
|
---|
| 599 | }
|
---|
| 600 |
|
---|
| 601 | /**
|
---|
| 602 | * get the center of all the pointers
|
---|
| 603 | * @param {Array} pointers
|
---|
| 604 | * @return {Object} center contains `x` and `y` properties
|
---|
| 605 | */
|
---|
| 606 | function getCenter(pointers) {
|
---|
| 607 | var pointersLength = pointers.length;
|
---|
| 608 |
|
---|
| 609 | // no need to loop when only one touch
|
---|
| 610 | if (pointersLength === 1) {
|
---|
| 611 | return {
|
---|
| 612 | x: round(pointers[0].clientX),
|
---|
| 613 | y: round(pointers[0].clientY)
|
---|
| 614 | };
|
---|
| 615 | }
|
---|
| 616 |
|
---|
| 617 | var x = 0, y = 0, i = 0;
|
---|
| 618 | while (i < pointersLength) {
|
---|
| 619 | x += pointers[i].clientX;
|
---|
| 620 | y += pointers[i].clientY;
|
---|
| 621 | i++;
|
---|
| 622 | }
|
---|
| 623 |
|
---|
| 624 | return {
|
---|
| 625 | x: round(x / pointersLength),
|
---|
| 626 | y: round(y / pointersLength)
|
---|
| 627 | };
|
---|
| 628 | }
|
---|
| 629 |
|
---|
| 630 | /**
|
---|
| 631 | * calculate the velocity between two points. unit is in px per ms.
|
---|
| 632 | * @param {Number} deltaTime
|
---|
| 633 | * @param {Number} x
|
---|
| 634 | * @param {Number} y
|
---|
| 635 | * @return {Object} velocity `x` and `y`
|
---|
| 636 | */
|
---|
| 637 | function getVelocity(deltaTime, x, y) {
|
---|
| 638 | return {
|
---|
| 639 | x: x / deltaTime || 0,
|
---|
| 640 | y: y / deltaTime || 0
|
---|
| 641 | };
|
---|
| 642 | }
|
---|
| 643 |
|
---|
| 644 | /**
|
---|
| 645 | * get the direction between two points
|
---|
| 646 | * @param {Number} x
|
---|
| 647 | * @param {Number} y
|
---|
| 648 | * @return {Number} direction
|
---|
| 649 | */
|
---|
| 650 | function getDirection(x, y) {
|
---|
| 651 | if (x === y) {
|
---|
| 652 | return DIRECTION_NONE;
|
---|
| 653 | }
|
---|
| 654 |
|
---|
| 655 | if (abs(x) >= abs(y)) {
|
---|
| 656 | return x > 0 ? DIRECTION_LEFT : DIRECTION_RIGHT;
|
---|
| 657 | }
|
---|
| 658 | return y > 0 ? DIRECTION_UP : DIRECTION_DOWN;
|
---|
| 659 | }
|
---|
| 660 |
|
---|
| 661 | /**
|
---|
| 662 | * calculate the absolute distance between two points
|
---|
| 663 | * @param {Object} p1 {x, y}
|
---|
| 664 | * @param {Object} p2 {x, y}
|
---|
| 665 | * @param {Array} [props] containing x and y keys
|
---|
| 666 | * @return {Number} distance
|
---|
| 667 | */
|
---|
| 668 | function getDistance(p1, p2, props) {
|
---|
| 669 | if (!props) {
|
---|
| 670 | props = PROPS_XY;
|
---|
| 671 | }
|
---|
| 672 | var x = p2[props[0]] - p1[props[0]],
|
---|
| 673 | y = p2[props[1]] - p1[props[1]];
|
---|
| 674 |
|
---|
| 675 | return Math.sqrt((x * x) + (y * y));
|
---|
| 676 | }
|
---|
| 677 |
|
---|
| 678 | /**
|
---|
| 679 | * calculate the angle between two coordinates
|
---|
| 680 | * @param {Object} p1
|
---|
| 681 | * @param {Object} p2
|
---|
| 682 | * @param {Array} [props] containing x and y keys
|
---|
| 683 | * @return {Number} angle
|
---|
| 684 | */
|
---|
| 685 | function getAngle(p1, p2, props) {
|
---|
| 686 | if (!props) {
|
---|
| 687 | props = PROPS_XY;
|
---|
| 688 | }
|
---|
| 689 | var x = p2[props[0]] - p1[props[0]],
|
---|
| 690 | y = p2[props[1]] - p1[props[1]];
|
---|
| 691 | return Math.atan2(y, x) * 180 / Math.PI;
|
---|
| 692 | }
|
---|
| 693 |
|
---|
| 694 | /**
|
---|
| 695 | * calculate the rotation degrees between two pointersets
|
---|
| 696 | * @param {Array} start array of pointers
|
---|
| 697 | * @param {Array} end array of pointers
|
---|
| 698 | * @return {Number} rotation
|
---|
| 699 | */
|
---|
| 700 | function getRotation(start, end) {
|
---|
| 701 | return getAngle(end[1], end[0], PROPS_CLIENT_XY) - getAngle(start[1], start[0], PROPS_CLIENT_XY);
|
---|
| 702 | }
|
---|
| 703 |
|
---|
| 704 | /**
|
---|
| 705 | * calculate the scale factor between two pointersets
|
---|
| 706 | * no scale is 1, and goes down to 0 when pinched together, and bigger when pinched out
|
---|
| 707 | * @param {Array} start array of pointers
|
---|
| 708 | * @param {Array} end array of pointers
|
---|
| 709 | * @return {Number} scale
|
---|
| 710 | */
|
---|
| 711 | function getScale(start, end) {
|
---|
| 712 | return getDistance(end[0], end[1], PROPS_CLIENT_XY) / getDistance(start[0], start[1], PROPS_CLIENT_XY);
|
---|
| 713 | }
|
---|
| 714 |
|
---|
| 715 | var MOUSE_INPUT_MAP = {
|
---|
| 716 | mousedown: INPUT_START,
|
---|
| 717 | mousemove: INPUT_MOVE,
|
---|
| 718 | mouseup: INPUT_END
|
---|
| 719 | };
|
---|
| 720 |
|
---|
| 721 | var MOUSE_ELEMENT_EVENTS = 'mousedown';
|
---|
| 722 | var MOUSE_WINDOW_EVENTS = 'mousemove mouseup';
|
---|
| 723 |
|
---|
| 724 | /**
|
---|
| 725 | * Mouse events input
|
---|
| 726 | * @constructor
|
---|
| 727 | * @extends Input
|
---|
| 728 | */
|
---|
| 729 | function MouseInput() {
|
---|
| 730 | this.evEl = MOUSE_ELEMENT_EVENTS;
|
---|
| 731 | this.evWin = MOUSE_WINDOW_EVENTS;
|
---|
| 732 |
|
---|
| 733 | this.allow = true; // used by Input.TouchMouse to disable mouse events
|
---|
| 734 | this.pressed = false; // mousedown state
|
---|
| 735 |
|
---|
| 736 | Input.apply(this, arguments);
|
---|
| 737 | }
|
---|
| 738 |
|
---|
| 739 | inherit(MouseInput, Input, {
|
---|
| 740 | /**
|
---|
| 741 | * handle mouse events
|
---|
| 742 | * @param {Object} ev
|
---|
| 743 | */
|
---|
| 744 | handler: function MEhandler(ev) {
|
---|
| 745 | var eventType = MOUSE_INPUT_MAP[ev.type];
|
---|
| 746 |
|
---|
| 747 | // on start we want to have the left mouse button down
|
---|
| 748 | if (eventType & INPUT_START && ev.button === 0) {
|
---|
| 749 | this.pressed = true;
|
---|
| 750 | }
|
---|
| 751 |
|
---|
| 752 | if (eventType & INPUT_MOVE && ev.which !== 1) {
|
---|
| 753 | eventType = INPUT_END;
|
---|
| 754 | }
|
---|
| 755 |
|
---|
| 756 | // mouse must be down, and mouse events are allowed (see the TouchMouse input)
|
---|
| 757 | if (!this.pressed || !this.allow) {
|
---|
| 758 | return;
|
---|
| 759 | }
|
---|
| 760 |
|
---|
| 761 | if (eventType & INPUT_END) {
|
---|
| 762 | this.pressed = false;
|
---|
| 763 | }
|
---|
| 764 |
|
---|
| 765 | this.callback(this.manager, eventType, {
|
---|
| 766 | pointers: [ev],
|
---|
| 767 | changedPointers: [ev],
|
---|
| 768 | pointerType: INPUT_TYPE_MOUSE,
|
---|
| 769 | srcEvent: ev
|
---|
| 770 | });
|
---|
| 771 | }
|
---|
| 772 | });
|
---|
| 773 |
|
---|
| 774 | var POINTER_INPUT_MAP = {
|
---|
| 775 | pointerdown: INPUT_START,
|
---|
| 776 | pointermove: INPUT_MOVE,
|
---|
| 777 | pointerup: INPUT_END,
|
---|
| 778 | pointercancel: INPUT_CANCEL,
|
---|
| 779 | pointerout: INPUT_CANCEL
|
---|
| 780 | };
|
---|
| 781 |
|
---|
| 782 | // in IE10 the pointer types is defined as an enum
|
---|
| 783 | var IE10_POINTER_TYPE_ENUM = {
|
---|
| 784 | 2: INPUT_TYPE_TOUCH,
|
---|
| 785 | 3: INPUT_TYPE_PEN,
|
---|
| 786 | 4: INPUT_TYPE_MOUSE,
|
---|
| 787 | 5: INPUT_TYPE_KINECT // see https://twitter.com/jacobrossi/status/480596438489890816
|
---|
| 788 | };
|
---|
| 789 |
|
---|
| 790 | var POINTER_ELEMENT_EVENTS = 'pointerdown';
|
---|
| 791 | var POINTER_WINDOW_EVENTS = 'pointermove pointerup pointercancel';
|
---|
| 792 |
|
---|
| 793 | // IE10 has prefixed support, and case-sensitive
|
---|
| 794 | if (window.MSPointerEvent) {
|
---|
| 795 | POINTER_ELEMENT_EVENTS = 'MSPointerDown';
|
---|
| 796 | POINTER_WINDOW_EVENTS = 'MSPointerMove MSPointerUp MSPointerCancel';
|
---|
| 797 | }
|
---|
| 798 |
|
---|
| 799 | /**
|
---|
| 800 | * Pointer events input
|
---|
| 801 | * @constructor
|
---|
| 802 | * @extends Input
|
---|
| 803 | */
|
---|
| 804 | function PointerEventInput() {
|
---|
| 805 | this.evEl = POINTER_ELEMENT_EVENTS;
|
---|
| 806 | this.evWin = POINTER_WINDOW_EVENTS;
|
---|
| 807 |
|
---|
| 808 | Input.apply(this, arguments);
|
---|
| 809 |
|
---|
| 810 | this.store = (this.manager.session.pointerEvents = []);
|
---|
| 811 | }
|
---|
| 812 |
|
---|
| 813 | inherit(PointerEventInput, Input, {
|
---|
| 814 | /**
|
---|
| 815 | * handle mouse events
|
---|
| 816 | * @param {Object} ev
|
---|
| 817 | */
|
---|
| 818 | handler: function PEhandler(ev) {
|
---|
| 819 | var store = this.store;
|
---|
| 820 | var removePointer = false;
|
---|
| 821 |
|
---|
| 822 | var eventTypeNormalized = ev.type.toLowerCase().replace('ms', '');
|
---|
| 823 | var eventType = POINTER_INPUT_MAP[eventTypeNormalized];
|
---|
| 824 | var pointerType = IE10_POINTER_TYPE_ENUM[ev.pointerType] || ev.pointerType;
|
---|
| 825 |
|
---|
| 826 | var isTouch = (pointerType == INPUT_TYPE_TOUCH);
|
---|
| 827 |
|
---|
| 828 | // get index of the event in the store
|
---|
| 829 | var storeIndex = inArray(store, ev.pointerId, 'pointerId');
|
---|
| 830 |
|
---|
| 831 | // start and mouse must be down
|
---|
| 832 | if (eventType & INPUT_START && (ev.button === 0 || isTouch)) {
|
---|
| 833 | if (storeIndex < 0) {
|
---|
| 834 | store.push(ev);
|
---|
| 835 | storeIndex = store.length - 1;
|
---|
| 836 | }
|
---|
| 837 | } else if (eventType & (INPUT_END | INPUT_CANCEL)) {
|
---|
| 838 | removePointer = true;
|
---|
| 839 | }
|
---|
| 840 |
|
---|
| 841 | // it not found, so the pointer hasn't been down (so it's probably a hover)
|
---|
| 842 | if (storeIndex < 0) {
|
---|
| 843 | return;
|
---|
| 844 | }
|
---|
| 845 |
|
---|
| 846 | // update the event in the store
|
---|
| 847 | store[storeIndex] = ev;
|
---|
| 848 |
|
---|
| 849 | this.callback(this.manager, eventType, {
|
---|
| 850 | pointers: store,
|
---|
| 851 | changedPointers: [ev],
|
---|
| 852 | pointerType: pointerType,
|
---|
| 853 | srcEvent: ev
|
---|
| 854 | });
|
---|
| 855 |
|
---|
| 856 | if (removePointer) {
|
---|
| 857 | // remove from the store
|
---|
| 858 | store.splice(storeIndex, 1);
|
---|
| 859 | }
|
---|
| 860 | }
|
---|
| 861 | });
|
---|
| 862 |
|
---|
| 863 | var SINGLE_TOUCH_INPUT_MAP = {
|
---|
| 864 | touchstart: INPUT_START,
|
---|
| 865 | touchmove: INPUT_MOVE,
|
---|
| 866 | touchend: INPUT_END,
|
---|
| 867 | touchcancel: INPUT_CANCEL
|
---|
| 868 | };
|
---|
| 869 |
|
---|
| 870 | var SINGLE_TOUCH_TARGET_EVENTS = 'touchstart';
|
---|
| 871 | var SINGLE_TOUCH_WINDOW_EVENTS = 'touchstart touchmove touchend touchcancel';
|
---|
| 872 |
|
---|
| 873 | /**
|
---|
| 874 | * Touch events input
|
---|
| 875 | * @constructor
|
---|
| 876 | * @extends Input
|
---|
| 877 | */
|
---|
| 878 | function SingleTouchInput() {
|
---|
| 879 | this.evTarget = SINGLE_TOUCH_TARGET_EVENTS;
|
---|
| 880 | this.evWin = SINGLE_TOUCH_WINDOW_EVENTS;
|
---|
| 881 | this.started = false;
|
---|
| 882 |
|
---|
| 883 | Input.apply(this, arguments);
|
---|
| 884 | }
|
---|
| 885 |
|
---|
| 886 | inherit(SingleTouchInput, Input, {
|
---|
| 887 | handler: function TEhandler(ev) {
|
---|
| 888 | var type = SINGLE_TOUCH_INPUT_MAP[ev.type];
|
---|
| 889 |
|
---|
| 890 | // should we handle the touch events?
|
---|
| 891 | if (type === INPUT_START) {
|
---|
| 892 | this.started = true;
|
---|
| 893 | }
|
---|
| 894 |
|
---|
| 895 | if (!this.started) {
|
---|
| 896 | return;
|
---|
| 897 | }
|
---|
| 898 |
|
---|
| 899 | var touches = normalizeSingleTouches.call(this, ev, type);
|
---|
| 900 |
|
---|
| 901 | // when done, reset the started state
|
---|
| 902 | if (type & (INPUT_END | INPUT_CANCEL) && touches[0].length - touches[1].length === 0) {
|
---|
| 903 | this.started = false;
|
---|
| 904 | }
|
---|
| 905 |
|
---|
| 906 | this.callback(this.manager, type, {
|
---|
| 907 | pointers: touches[0],
|
---|
| 908 | changedPointers: touches[1],
|
---|
| 909 | pointerType: INPUT_TYPE_TOUCH,
|
---|
| 910 | srcEvent: ev
|
---|
| 911 | });
|
---|
| 912 | }
|
---|
| 913 | });
|
---|
| 914 |
|
---|
| 915 | /**
|
---|
| 916 | * @this {TouchInput}
|
---|
| 917 | * @param {Object} ev
|
---|
| 918 | * @param {Number} type flag
|
---|
| 919 | * @returns {undefined|Array} [all, changed]
|
---|
| 920 | */
|
---|
| 921 | function normalizeSingleTouches(ev, type) {
|
---|
| 922 | var all = toArray(ev.touches);
|
---|
| 923 | var changed = toArray(ev.changedTouches);
|
---|
| 924 |
|
---|
| 925 | if (type & (INPUT_END | INPUT_CANCEL)) {
|
---|
| 926 | all = uniqueArray(all.concat(changed), 'identifier', true);
|
---|
| 927 | }
|
---|
| 928 |
|
---|
| 929 | return [all, changed];
|
---|
| 930 | }
|
---|
| 931 |
|
---|
| 932 | var TOUCH_INPUT_MAP = {
|
---|
| 933 | touchstart: INPUT_START,
|
---|
| 934 | touchmove: INPUT_MOVE,
|
---|
| 935 | touchend: INPUT_END,
|
---|
| 936 | touchcancel: INPUT_CANCEL
|
---|
| 937 | };
|
---|
| 938 |
|
---|
| 939 | var TOUCH_TARGET_EVENTS = 'touchstart touchmove touchend touchcancel';
|
---|
| 940 |
|
---|
| 941 | /**
|
---|
| 942 | * Multi-user touch events input
|
---|
| 943 | * @constructor
|
---|
| 944 | * @extends Input
|
---|
| 945 | */
|
---|
| 946 | function TouchInput() {
|
---|
| 947 | this.evTarget = TOUCH_TARGET_EVENTS;
|
---|
| 948 | this.targetIds = {};
|
---|
| 949 |
|
---|
| 950 | Input.apply(this, arguments);
|
---|
| 951 | }
|
---|
| 952 |
|
---|
| 953 | inherit(TouchInput, Input, {
|
---|
| 954 | handler: function MTEhandler(ev) {
|
---|
| 955 | var type = TOUCH_INPUT_MAP[ev.type];
|
---|
| 956 | var touches = getTouches.call(this, ev, type);
|
---|
| 957 | if (!touches) {
|
---|
| 958 | return;
|
---|
| 959 | }
|
---|
| 960 |
|
---|
| 961 | this.callback(this.manager, type, {
|
---|
| 962 | pointers: touches[0],
|
---|
| 963 | changedPointers: touches[1],
|
---|
| 964 | pointerType: INPUT_TYPE_TOUCH,
|
---|
| 965 | srcEvent: ev
|
---|
| 966 | });
|
---|
| 967 | }
|
---|
| 968 | });
|
---|
| 969 |
|
---|
| 970 | /**
|
---|
| 971 | * @this {TouchInput}
|
---|
| 972 | * @param {Object} ev
|
---|
| 973 | * @param {Number} type flag
|
---|
| 974 | * @returns {undefined|Array} [all, changed]
|
---|
| 975 | */
|
---|
| 976 | function getTouches(ev, type) {
|
---|
| 977 | var allTouches = toArray(ev.touches);
|
---|
| 978 | var targetIds = this.targetIds;
|
---|
| 979 |
|
---|
| 980 | // when there is only one touch, the process can be simplified
|
---|
| 981 | if (type & (INPUT_START | INPUT_MOVE) && allTouches.length === 1) {
|
---|
| 982 | targetIds[allTouches[0].identifier] = true;
|
---|
| 983 | return [allTouches, allTouches];
|
---|
| 984 | }
|
---|
| 985 |
|
---|
| 986 | var i,
|
---|
| 987 | targetTouches,
|
---|
| 988 | changedTouches = toArray(ev.changedTouches),
|
---|
| 989 | changedTargetTouches = [],
|
---|
| 990 | target = this.target;
|
---|
| 991 |
|
---|
| 992 | // get target touches from touches
|
---|
| 993 | targetTouches = allTouches.filter(function(touch) {
|
---|
| 994 | return hasParent(touch.target, target);
|
---|
| 995 | });
|
---|
| 996 |
|
---|
| 997 | // collect touches
|
---|
| 998 | if (type === INPUT_START) {
|
---|
| 999 | i = 0;
|
---|
| 1000 | while (i < targetTouches.length) {
|
---|
| 1001 | targetIds[targetTouches[i].identifier] = true;
|
---|
| 1002 | i++;
|
---|
| 1003 | }
|
---|
| 1004 | }
|
---|
| 1005 |
|
---|
| 1006 | // filter changed touches to only contain touches that exist in the collected target ids
|
---|
| 1007 | i = 0;
|
---|
| 1008 | while (i < changedTouches.length) {
|
---|
| 1009 | if (targetIds[changedTouches[i].identifier]) {
|
---|
| 1010 | changedTargetTouches.push(changedTouches[i]);
|
---|
| 1011 | }
|
---|
| 1012 |
|
---|
| 1013 | // cleanup removed touches
|
---|
| 1014 | if (type & (INPUT_END | INPUT_CANCEL)) {
|
---|
| 1015 | delete targetIds[changedTouches[i].identifier];
|
---|
| 1016 | }
|
---|
| 1017 | i++;
|
---|
| 1018 | }
|
---|
| 1019 |
|
---|
| 1020 | if (!changedTargetTouches.length) {
|
---|
| 1021 | return;
|
---|
| 1022 | }
|
---|
| 1023 |
|
---|
| 1024 | return [
|
---|
| 1025 | // merge targetTouches with changedTargetTouches so it contains ALL touches, including 'end' and 'cancel'
|
---|
| 1026 | uniqueArray(targetTouches.concat(changedTargetTouches), 'identifier', true),
|
---|
| 1027 | changedTargetTouches
|
---|
| 1028 | ];
|
---|
| 1029 | }
|
---|
| 1030 |
|
---|
| 1031 | /**
|
---|
| 1032 | * Combined touch and mouse input
|
---|
| 1033 | *
|
---|
| 1034 | * Touch has a higher priority then mouse, and while touching no mouse events are allowed.
|
---|
| 1035 | * This because touch devices also emit mouse events while doing a touch.
|
---|
| 1036 | *
|
---|
| 1037 | * @constructor
|
---|
| 1038 | * @extends Input
|
---|
| 1039 | */
|
---|
| 1040 | function TouchMouseInput() {
|
---|
| 1041 | Input.apply(this, arguments);
|
---|
| 1042 |
|
---|
| 1043 | var handler = bindFn(this.handler, this);
|
---|
| 1044 | this.touch = new TouchInput(this.manager, handler);
|
---|
| 1045 | this.mouse = new MouseInput(this.manager, handler);
|
---|
| 1046 | }
|
---|
| 1047 |
|
---|
| 1048 | inherit(TouchMouseInput, Input, {
|
---|
| 1049 | /**
|
---|
| 1050 | * handle mouse and touch events
|
---|
| 1051 | * @param {Hammer} manager
|
---|
| 1052 | * @param {String} inputEvent
|
---|
| 1053 | * @param {Object} inputData
|
---|
| 1054 | */
|
---|
| 1055 | handler: function TMEhandler(manager, inputEvent, inputData) {
|
---|
| 1056 | var isTouch = (inputData.pointerType == INPUT_TYPE_TOUCH),
|
---|
| 1057 | isMouse = (inputData.pointerType == INPUT_TYPE_MOUSE);
|
---|
| 1058 |
|
---|
| 1059 | // when we're in a touch event, so block all upcoming mouse events
|
---|
| 1060 | // most mobile browser also emit mouseevents, right after touchstart
|
---|
| 1061 | if (isTouch) {
|
---|
| 1062 | this.mouse.allow = false;
|
---|
| 1063 | } else if (isMouse && !this.mouse.allow) {
|
---|
| 1064 | return;
|
---|
| 1065 | }
|
---|
| 1066 |
|
---|
| 1067 | // reset the allowMouse when we're done
|
---|
| 1068 | if (inputEvent & (INPUT_END | INPUT_CANCEL)) {
|
---|
| 1069 | this.mouse.allow = true;
|
---|
| 1070 | }
|
---|
| 1071 |
|
---|
| 1072 | this.callback(manager, inputEvent, inputData);
|
---|
| 1073 | },
|
---|
| 1074 |
|
---|
| 1075 | /**
|
---|
| 1076 | * remove the event listeners
|
---|
| 1077 | */
|
---|
| 1078 | destroy: function destroy() {
|
---|
| 1079 | this.touch.destroy();
|
---|
| 1080 | this.mouse.destroy();
|
---|
| 1081 | }
|
---|
| 1082 | });
|
---|
| 1083 |
|
---|
| 1084 | var PREFIXED_TOUCH_ACTION = prefixed(TEST_ELEMENT.style, 'touchAction');
|
---|
| 1085 | var NATIVE_TOUCH_ACTION = PREFIXED_TOUCH_ACTION !== undefined;
|
---|
| 1086 |
|
---|
| 1087 | // magical touchAction value
|
---|
| 1088 | var TOUCH_ACTION_COMPUTE = 'compute';
|
---|
| 1089 | var TOUCH_ACTION_AUTO = 'auto';
|
---|
| 1090 | var TOUCH_ACTION_MANIPULATION = 'manipulation'; // not implemented
|
---|
| 1091 | var TOUCH_ACTION_NONE = 'none';
|
---|
| 1092 | var TOUCH_ACTION_PAN_X = 'pan-x';
|
---|
| 1093 | var TOUCH_ACTION_PAN_Y = 'pan-y';
|
---|
| 1094 |
|
---|
| 1095 | /**
|
---|
| 1096 | * Touch Action
|
---|
| 1097 | * sets the touchAction property or uses the js alternative
|
---|
| 1098 | * @param {Manager} manager
|
---|
| 1099 | * @param {String} value
|
---|
| 1100 | * @constructor
|
---|
| 1101 | */
|
---|
| 1102 | function TouchAction(manager, value) {
|
---|
| 1103 | this.manager = manager;
|
---|
| 1104 | this.set(value);
|
---|
| 1105 | }
|
---|
| 1106 |
|
---|
| 1107 | TouchAction.prototype = {
|
---|
| 1108 | /**
|
---|
| 1109 | * set the touchAction value on the element or enable the polyfill
|
---|
| 1110 | * @param {String} value
|
---|
| 1111 | */
|
---|
| 1112 | set: function(value) {
|
---|
| 1113 | // find out the touch-action by the event handlers
|
---|
| 1114 | if (value == TOUCH_ACTION_COMPUTE) {
|
---|
| 1115 | value = this.compute();
|
---|
| 1116 | }
|
---|
| 1117 |
|
---|
| 1118 | if (NATIVE_TOUCH_ACTION) {
|
---|
| 1119 | this.manager.element.style[PREFIXED_TOUCH_ACTION] = value;
|
---|
| 1120 | }
|
---|
| 1121 | this.actions = value.toLowerCase().trim();
|
---|
| 1122 | },
|
---|
| 1123 |
|
---|
| 1124 | /**
|
---|
| 1125 | * just re-set the touchAction value
|
---|
| 1126 | */
|
---|
| 1127 | update: function() {
|
---|
| 1128 | this.set(this.manager.options.touchAction);
|
---|
| 1129 | },
|
---|
| 1130 |
|
---|
| 1131 | /**
|
---|
| 1132 | * compute the value for the touchAction property based on the recognizer's settings
|
---|
| 1133 | * @returns {String} value
|
---|
| 1134 | */
|
---|
| 1135 | compute: function() {
|
---|
| 1136 | var actions = [];
|
---|
| 1137 | each(this.manager.recognizers, function(recognizer) {
|
---|
| 1138 | if (boolOrFn(recognizer.options.enable, [recognizer])) {
|
---|
| 1139 | actions = actions.concat(recognizer.getTouchAction());
|
---|
| 1140 | }
|
---|
| 1141 | });
|
---|
| 1142 | return cleanTouchActions(actions.join(' '));
|
---|
| 1143 | },
|
---|
| 1144 |
|
---|
| 1145 | /**
|
---|
| 1146 | * this method is called on each input cycle and provides the preventing of the browser behavior
|
---|
| 1147 | * @param {Object} input
|
---|
| 1148 | */
|
---|
| 1149 | preventDefaults: function(input) {
|
---|
| 1150 | // not needed with native support for the touchAction property
|
---|
| 1151 | if (NATIVE_TOUCH_ACTION) {
|
---|
| 1152 | return;
|
---|
| 1153 | }
|
---|
| 1154 |
|
---|
| 1155 | var srcEvent = input.srcEvent;
|
---|
| 1156 | var direction = input.offsetDirection;
|
---|
| 1157 |
|
---|
| 1158 | // if the touch action did prevented once this session
|
---|
| 1159 | if (this.manager.session.prevented) {
|
---|
| 1160 | srcEvent.preventDefault();
|
---|
| 1161 | return;
|
---|
| 1162 | }
|
---|
| 1163 |
|
---|
| 1164 | var actions = this.actions;
|
---|
| 1165 | var hasNone = inStr(actions, TOUCH_ACTION_NONE);
|
---|
| 1166 | var hasPanY = inStr(actions, TOUCH_ACTION_PAN_Y);
|
---|
| 1167 | var hasPanX = inStr(actions, TOUCH_ACTION_PAN_X);
|
---|
| 1168 |
|
---|
| 1169 | if (hasNone ||
|
---|
| 1170 | (hasPanY && direction & DIRECTION_HORIZONTAL) ||
|
---|
| 1171 | (hasPanX && direction & DIRECTION_VERTICAL)) {
|
---|
| 1172 | return this.preventSrc(srcEvent);
|
---|
| 1173 | }
|
---|
| 1174 | },
|
---|
| 1175 |
|
---|
| 1176 | /**
|
---|
| 1177 | * call preventDefault to prevent the browser's default behavior (scrolling in most cases)
|
---|
| 1178 | * @param {Object} srcEvent
|
---|
| 1179 | */
|
---|
| 1180 | preventSrc: function(srcEvent) {
|
---|
| 1181 | this.manager.session.prevented = true;
|
---|
| 1182 | srcEvent.preventDefault();
|
---|
| 1183 | }
|
---|
| 1184 | };
|
---|
| 1185 |
|
---|
| 1186 | /**
|
---|
| 1187 | * when the touchActions are collected they are not a valid value, so we need to clean things up. *
|
---|
| 1188 | * @param {String} actions
|
---|
| 1189 | * @returns {*}
|
---|
| 1190 | */
|
---|
| 1191 | function cleanTouchActions(actions) {
|
---|
| 1192 | // none
|
---|
| 1193 | if (inStr(actions, TOUCH_ACTION_NONE)) {
|
---|
| 1194 | return TOUCH_ACTION_NONE;
|
---|
| 1195 | }
|
---|
| 1196 |
|
---|
| 1197 | var hasPanX = inStr(actions, TOUCH_ACTION_PAN_X);
|
---|
| 1198 | var hasPanY = inStr(actions, TOUCH_ACTION_PAN_Y);
|
---|
| 1199 |
|
---|
| 1200 | // pan-x and pan-y can be combined
|
---|
| 1201 | if (hasPanX && hasPanY) {
|
---|
| 1202 | return TOUCH_ACTION_PAN_X + ' ' + TOUCH_ACTION_PAN_Y;
|
---|
| 1203 | }
|
---|
| 1204 |
|
---|
| 1205 | // pan-x OR pan-y
|
---|
| 1206 | if (hasPanX || hasPanY) {
|
---|
| 1207 | return hasPanX ? TOUCH_ACTION_PAN_X : TOUCH_ACTION_PAN_Y;
|
---|
| 1208 | }
|
---|
| 1209 |
|
---|
| 1210 | // manipulation
|
---|
| 1211 | if (inStr(actions, TOUCH_ACTION_MANIPULATION)) {
|
---|
| 1212 | return TOUCH_ACTION_MANIPULATION;
|
---|
| 1213 | }
|
---|
| 1214 |
|
---|
| 1215 | return TOUCH_ACTION_AUTO;
|
---|
| 1216 | }
|
---|
| 1217 |
|
---|
| 1218 | /**
|
---|
| 1219 | * Recognizer flow explained; *
|
---|
| 1220 | * All recognizers have the initial state of POSSIBLE when a input session starts.
|
---|
| 1221 | * The definition of a input session is from the first input until the last input, with all it's movement in it. *
|
---|
| 1222 | * Example session for mouse-input: mousedown -> mousemove -> mouseup
|
---|
| 1223 | *
|
---|
| 1224 | * On each recognizing cycle (see Manager.recognize) the .recognize() method is executed
|
---|
| 1225 | * which determines with state it should be.
|
---|
| 1226 | *
|
---|
| 1227 | * If the recognizer has the state FAILED, CANCELLED or RECOGNIZED (equals ENDED), it is reset to
|
---|
| 1228 | * POSSIBLE to give it another change on the next cycle.
|
---|
| 1229 | *
|
---|
| 1230 | * Possible
|
---|
| 1231 | * |
|
---|
| 1232 | * +-----+---------------+
|
---|
| 1233 | * | |
|
---|
| 1234 | * +-----+-----+ |
|
---|
| 1235 | * | | |
|
---|
| 1236 | * Failed Cancelled |
|
---|
| 1237 | * +-------+------+
|
---|
| 1238 | * | |
|
---|
| 1239 | * Recognized Began
|
---|
| 1240 | * |
|
---|
| 1241 | * Changed
|
---|
| 1242 | * |
|
---|
| 1243 | * Ended/Recognized
|
---|
| 1244 | */
|
---|
| 1245 | var STATE_POSSIBLE = 1;
|
---|
| 1246 | var STATE_BEGAN = 2;
|
---|
| 1247 | var STATE_CHANGED = 4;
|
---|
| 1248 | var STATE_ENDED = 8;
|
---|
| 1249 | var STATE_RECOGNIZED = STATE_ENDED;
|
---|
| 1250 | var STATE_CANCELLED = 16;
|
---|
| 1251 | var STATE_FAILED = 32;
|
---|
| 1252 |
|
---|
| 1253 | /**
|
---|
| 1254 | * Recognizer
|
---|
| 1255 | * Every recognizer needs to extend from this class.
|
---|
| 1256 | * @constructor
|
---|
| 1257 | * @param {Object} options
|
---|
| 1258 | */
|
---|
| 1259 | function Recognizer(options) {
|
---|
| 1260 | this.id = uniqueId();
|
---|
| 1261 |
|
---|
| 1262 | this.manager = null;
|
---|
| 1263 | this.options = merge(options || {}, this.defaults);
|
---|
| 1264 |
|
---|
| 1265 | // default is enable true
|
---|
| 1266 | this.options.enable = ifUndefined(this.options.enable, true);
|
---|
| 1267 |
|
---|
| 1268 | this.state = STATE_POSSIBLE;
|
---|
| 1269 |
|
---|
| 1270 | this.simultaneous = {};
|
---|
| 1271 | this.requireFail = [];
|
---|
| 1272 | }
|
---|
| 1273 |
|
---|
| 1274 | Recognizer.prototype = {
|
---|
| 1275 | /**
|
---|
| 1276 | * @virtual
|
---|
| 1277 | * @type {Object}
|
---|
| 1278 | */
|
---|
| 1279 | defaults: {},
|
---|
| 1280 |
|
---|
| 1281 | /**
|
---|
| 1282 | * set options
|
---|
| 1283 | * @param {Object} options
|
---|
| 1284 | * @return {Recognizer}
|
---|
| 1285 | */
|
---|
| 1286 | set: function(options) {
|
---|
| 1287 | extend(this.options, options);
|
---|
| 1288 |
|
---|
| 1289 | // also update the touchAction, in case something changed about the directions/enabled state
|
---|
| 1290 | this.manager && this.manager.touchAction.update();
|
---|
| 1291 | return this;
|
---|
| 1292 | },
|
---|
| 1293 |
|
---|
| 1294 | /**
|
---|
| 1295 | * recognize simultaneous with an other recognizer.
|
---|
| 1296 | * @param {Recognizer} otherRecognizer
|
---|
| 1297 | * @returns {Recognizer} this
|
---|
| 1298 | */
|
---|
| 1299 | recognizeWith: function(otherRecognizer) {
|
---|
| 1300 | if (invokeArrayArg(otherRecognizer, 'recognizeWith', this)) {
|
---|
| 1301 | return this;
|
---|
| 1302 | }
|
---|
| 1303 |
|
---|
| 1304 | var simultaneous = this.simultaneous;
|
---|
| 1305 | otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);
|
---|
| 1306 | if (!simultaneous[otherRecognizer.id]) {
|
---|
| 1307 | simultaneous[otherRecognizer.id] = otherRecognizer;
|
---|
| 1308 | otherRecognizer.recognizeWith(this);
|
---|
| 1309 | }
|
---|
| 1310 | return this;
|
---|
| 1311 | },
|
---|
| 1312 |
|
---|
| 1313 | /**
|
---|
| 1314 | * drop the simultaneous link. it doesnt remove the link on the other recognizer.
|
---|
| 1315 | * @param {Recognizer} otherRecognizer
|
---|
| 1316 | * @returns {Recognizer} this
|
---|
| 1317 | */
|
---|
| 1318 | dropRecognizeWith: function(otherRecognizer) {
|
---|
| 1319 | if (invokeArrayArg(otherRecognizer, 'dropRecognizeWith', this)) {
|
---|
| 1320 | return this;
|
---|
| 1321 | }
|
---|
| 1322 |
|
---|
| 1323 | otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);
|
---|
| 1324 | delete this.simultaneous[otherRecognizer.id];
|
---|
| 1325 | return this;
|
---|
| 1326 | },
|
---|
| 1327 |
|
---|
| 1328 | /**
|
---|
| 1329 | * recognizer can only run when an other is failing
|
---|
| 1330 | * @param {Recognizer} otherRecognizer
|
---|
| 1331 | * @returns {Recognizer} this
|
---|
| 1332 | */
|
---|
| 1333 | requireFailure: function(otherRecognizer) {
|
---|
| 1334 | if (invokeArrayArg(otherRecognizer, 'requireFailure', this)) {
|
---|
| 1335 | return this;
|
---|
| 1336 | }
|
---|
| 1337 |
|
---|
| 1338 | var requireFail = this.requireFail;
|
---|
| 1339 | otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);
|
---|
| 1340 | if (inArray(requireFail, otherRecognizer) === -1) {
|
---|
| 1341 | requireFail.push(otherRecognizer);
|
---|
| 1342 | otherRecognizer.requireFailure(this);
|
---|
| 1343 | }
|
---|
| 1344 | return this;
|
---|
| 1345 | },
|
---|
| 1346 |
|
---|
| 1347 | /**
|
---|
| 1348 | * drop the requireFailure link. it does not remove the link on the other recognizer.
|
---|
| 1349 | * @param {Recognizer} otherRecognizer
|
---|
| 1350 | * @returns {Recognizer} this
|
---|
| 1351 | */
|
---|
| 1352 | dropRequireFailure: function(otherRecognizer) {
|
---|
| 1353 | if (invokeArrayArg(otherRecognizer, 'dropRequireFailure', this)) {
|
---|
| 1354 | return this;
|
---|
| 1355 | }
|
---|
| 1356 |
|
---|
| 1357 | otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);
|
---|
| 1358 | var index = inArray(this.requireFail, otherRecognizer);
|
---|
| 1359 | if (index > -1) {
|
---|
| 1360 | this.requireFail.splice(index, 1);
|
---|
| 1361 | }
|
---|
| 1362 | return this;
|
---|
| 1363 | },
|
---|
| 1364 |
|
---|
| 1365 | /**
|
---|
| 1366 | * has require failures boolean
|
---|
| 1367 | * @returns {boolean}
|
---|
| 1368 | */
|
---|
| 1369 | hasRequireFailures: function() {
|
---|
| 1370 | return this.requireFail.length > 0;
|
---|
| 1371 | },
|
---|
| 1372 |
|
---|
| 1373 | /**
|
---|
| 1374 | * if the recognizer can recognize simultaneous with an other recognizer
|
---|
| 1375 | * @param {Recognizer} otherRecognizer
|
---|
| 1376 | * @returns {Boolean}
|
---|
| 1377 | */
|
---|
| 1378 | canRecognizeWith: function(otherRecognizer) {
|
---|
| 1379 | return !!this.simultaneous[otherRecognizer.id];
|
---|
| 1380 | },
|
---|
| 1381 |
|
---|
| 1382 | /**
|
---|
| 1383 | * You should use `tryEmit` instead of `emit` directly to check
|
---|
| 1384 | * that all the needed recognizers has failed before emitting.
|
---|
| 1385 | * @param {Object} input
|
---|
| 1386 | */
|
---|
| 1387 | emit: function(input) {
|
---|
| 1388 | var self = this;
|
---|
| 1389 | var state = this.state;
|
---|
| 1390 |
|
---|
| 1391 | function emit(withState) {
|
---|
| 1392 | self.manager.emit(self.options.event + (withState ? stateStr(state) : ''), input);
|
---|
| 1393 | }
|
---|
| 1394 |
|
---|
| 1395 | // 'panstart' and 'panmove'
|
---|
| 1396 | if (state < STATE_ENDED) {
|
---|
| 1397 | emit(true);
|
---|
| 1398 | }
|
---|
| 1399 |
|
---|
| 1400 | emit(); // simple 'eventName' events
|
---|
| 1401 |
|
---|
| 1402 | // panend and pancancel
|
---|
| 1403 | if (state >= STATE_ENDED) {
|
---|
| 1404 | emit(true);
|
---|
| 1405 | }
|
---|
| 1406 | },
|
---|
| 1407 |
|
---|
| 1408 | /**
|
---|
| 1409 | * Check that all the require failure recognizers has failed,
|
---|
| 1410 | * if true, it emits a gesture event,
|
---|
| 1411 | * otherwise, setup the state to FAILED.
|
---|
| 1412 | * @param {Object} input
|
---|
| 1413 | */
|
---|
| 1414 | tryEmit: function(input) {
|
---|
| 1415 | if (this.canEmit()) {
|
---|
| 1416 | return this.emit(input);
|
---|
| 1417 | }
|
---|
| 1418 | // it's failing anyway
|
---|
| 1419 | this.state = STATE_FAILED;
|
---|
| 1420 | },
|
---|
| 1421 |
|
---|
| 1422 | /**
|
---|
| 1423 | * can we emit?
|
---|
| 1424 | * @returns {boolean}
|
---|
| 1425 | */
|
---|
| 1426 | canEmit: function() {
|
---|
| 1427 | var i = 0;
|
---|
| 1428 | while (i < this.requireFail.length) {
|
---|
| 1429 | if (!(this.requireFail[i].state & (STATE_FAILED | STATE_POSSIBLE))) {
|
---|
| 1430 | return false;
|
---|
| 1431 | }
|
---|
| 1432 | i++;
|
---|
| 1433 | }
|
---|
| 1434 | return true;
|
---|
| 1435 | },
|
---|
| 1436 |
|
---|
| 1437 | /**
|
---|
| 1438 | * update the recognizer
|
---|
| 1439 | * @param {Object} inputData
|
---|
| 1440 | */
|
---|
| 1441 | recognize: function(inputData) {
|
---|
| 1442 | // make a new copy of the inputData
|
---|
| 1443 | // so we can change the inputData without messing up the other recognizers
|
---|
| 1444 | var inputDataClone = extend({}, inputData);
|
---|
| 1445 |
|
---|
| 1446 | // is is enabled and allow recognizing?
|
---|
| 1447 | if (!boolOrFn(this.options.enable, [this, inputDataClone])) {
|
---|
| 1448 | this.reset();
|
---|
| 1449 | this.state = STATE_FAILED;
|
---|
| 1450 | return;
|
---|
| 1451 | }
|
---|
| 1452 |
|
---|
| 1453 | // reset when we've reached the end
|
---|
| 1454 | if (this.state & (STATE_RECOGNIZED | STATE_CANCELLED | STATE_FAILED)) {
|
---|
| 1455 | this.state = STATE_POSSIBLE;
|
---|
| 1456 | }
|
---|
| 1457 |
|
---|
| 1458 | this.state = this.process(inputDataClone);
|
---|
| 1459 |
|
---|
| 1460 | // the recognizer has recognized a gesture
|
---|
| 1461 | // so trigger an event
|
---|
| 1462 | if (this.state & (STATE_BEGAN | STATE_CHANGED | STATE_ENDED | STATE_CANCELLED)) {
|
---|
| 1463 | this.tryEmit(inputDataClone);
|
---|
| 1464 | }
|
---|
| 1465 | },
|
---|
| 1466 |
|
---|
| 1467 | /**
|
---|
| 1468 | * return the state of the recognizer
|
---|
| 1469 | * the actual recognizing happens in this method
|
---|
| 1470 | * @virtual
|
---|
| 1471 | * @param {Object} inputData
|
---|
| 1472 | * @returns {Const} STATE
|
---|
| 1473 | */
|
---|
| 1474 | process: function(inputData) { }, // jshint ignore:line
|
---|
| 1475 |
|
---|
| 1476 | /**
|
---|
| 1477 | * return the preferred touch-action
|
---|
| 1478 | * @virtual
|
---|
| 1479 | * @returns {Array}
|
---|
| 1480 | */
|
---|
| 1481 | getTouchAction: function() { },
|
---|
| 1482 |
|
---|
| 1483 | /**
|
---|
| 1484 | * called when the gesture isn't allowed to recognize
|
---|
| 1485 | * like when another is being recognized or it is disabled
|
---|
| 1486 | * @virtual
|
---|
| 1487 | */
|
---|
| 1488 | reset: function() { }
|
---|
| 1489 | };
|
---|
| 1490 |
|
---|
| 1491 | /**
|
---|
| 1492 | * get a usable string, used as event postfix
|
---|
| 1493 | * @param {Const} state
|
---|
| 1494 | * @returns {String} state
|
---|
| 1495 | */
|
---|
| 1496 | function stateStr(state) {
|
---|
| 1497 | if (state & STATE_CANCELLED) {
|
---|
| 1498 | return 'cancel';
|
---|
| 1499 | } else if (state & STATE_ENDED) {
|
---|
| 1500 | return 'end';
|
---|
| 1501 | } else if (state & STATE_CHANGED) {
|
---|
| 1502 | return 'move';
|
---|
| 1503 | } else if (state & STATE_BEGAN) {
|
---|
| 1504 | return 'start';
|
---|
| 1505 | }
|
---|
| 1506 | return '';
|
---|
| 1507 | }
|
---|
| 1508 |
|
---|
| 1509 | /**
|
---|
| 1510 | * direction cons to string
|
---|
| 1511 | * @param {Const} direction
|
---|
| 1512 | * @returns {String}
|
---|
| 1513 | */
|
---|
| 1514 | function directionStr(direction) {
|
---|
| 1515 | if (direction == DIRECTION_DOWN) {
|
---|
| 1516 | return 'down';
|
---|
| 1517 | } else if (direction == DIRECTION_UP) {
|
---|
| 1518 | return 'up';
|
---|
| 1519 | } else if (direction == DIRECTION_LEFT) {
|
---|
| 1520 | return 'left';
|
---|
| 1521 | } else if (direction == DIRECTION_RIGHT) {
|
---|
| 1522 | return 'right';
|
---|
| 1523 | }
|
---|
| 1524 | return '';
|
---|
| 1525 | }
|
---|
| 1526 |
|
---|
| 1527 | /**
|
---|
| 1528 | * get a recognizer by name if it is bound to a manager
|
---|
| 1529 | * @param {Recognizer|String} otherRecognizer
|
---|
| 1530 | * @param {Recognizer} recognizer
|
---|
| 1531 | * @returns {Recognizer}
|
---|
| 1532 | */
|
---|
| 1533 | function getRecognizerByNameIfManager(otherRecognizer, recognizer) {
|
---|
| 1534 | var manager = recognizer.manager;
|
---|
| 1535 | if (manager) {
|
---|
| 1536 | return manager.get(otherRecognizer);
|
---|
| 1537 | }
|
---|
| 1538 | return otherRecognizer;
|
---|
| 1539 | }
|
---|
| 1540 |
|
---|
| 1541 | /**
|
---|
| 1542 | * This recognizer is just used as a base for the simple attribute recognizers.
|
---|
| 1543 | * @constructor
|
---|
| 1544 | * @extends Recognizer
|
---|
| 1545 | */
|
---|
| 1546 | function AttrRecognizer() {
|
---|
| 1547 | Recognizer.apply(this, arguments);
|
---|
| 1548 | }
|
---|
| 1549 |
|
---|
| 1550 | inherit(AttrRecognizer, Recognizer, {
|
---|
| 1551 | /**
|
---|
| 1552 | * @namespace
|
---|
| 1553 | * @memberof AttrRecognizer
|
---|
| 1554 | */
|
---|
| 1555 | defaults: {
|
---|
| 1556 | /**
|
---|
| 1557 | * @type {Number}
|
---|
| 1558 | * @default 1
|
---|
| 1559 | */
|
---|
| 1560 | pointers: 1
|
---|
| 1561 | },
|
---|
| 1562 |
|
---|
| 1563 | /**
|
---|
| 1564 | * Used to check if it the recognizer receives valid input, like input.distance > 10.
|
---|
| 1565 | * @memberof AttrRecognizer
|
---|
| 1566 | * @param {Object} input
|
---|
| 1567 | * @returns {Boolean} recognized
|
---|
| 1568 | */
|
---|
| 1569 | attrTest: function(input) {
|
---|
| 1570 | var optionPointers = this.options.pointers;
|
---|
| 1571 | return optionPointers === 0 || input.pointers.length === optionPointers;
|
---|
| 1572 | },
|
---|
| 1573 |
|
---|
| 1574 | /**
|
---|
| 1575 | * Process the input and return the state for the recognizer
|
---|
| 1576 | * @memberof AttrRecognizer
|
---|
| 1577 | * @param {Object} input
|
---|
| 1578 | * @returns {*} State
|
---|
| 1579 | */
|
---|
| 1580 | process: function(input) {
|
---|
| 1581 | var state = this.state;
|
---|
| 1582 | var eventType = input.eventType;
|
---|
| 1583 |
|
---|
| 1584 | var isRecognized = state & (STATE_BEGAN | STATE_CHANGED);
|
---|
| 1585 | var isValid = this.attrTest(input);
|
---|
| 1586 |
|
---|
| 1587 | // on cancel input and we've recognized before, return STATE_CANCELLED
|
---|
| 1588 | if (isRecognized && (eventType & INPUT_CANCEL || !isValid)) {
|
---|
| 1589 | return state | STATE_CANCELLED;
|
---|
| 1590 | } else if (isRecognized || isValid) {
|
---|
| 1591 | if (eventType & INPUT_END) {
|
---|
| 1592 | return state | STATE_ENDED;
|
---|
| 1593 | } else if (!(state & STATE_BEGAN)) {
|
---|
| 1594 | return STATE_BEGAN;
|
---|
| 1595 | }
|
---|
| 1596 | return state | STATE_CHANGED;
|
---|
| 1597 | }
|
---|
| 1598 | return STATE_FAILED;
|
---|
| 1599 | }
|
---|
| 1600 | });
|
---|
| 1601 |
|
---|
| 1602 | /**
|
---|
| 1603 | * Pan
|
---|
| 1604 | * Recognized when the pointer is down and moved in the allowed direction.
|
---|
| 1605 | * @constructor
|
---|
| 1606 | * @extends AttrRecognizer
|
---|
| 1607 | */
|
---|
| 1608 | function PanRecognizer() {
|
---|
| 1609 | AttrRecognizer.apply(this, arguments);
|
---|
| 1610 |
|
---|
| 1611 | this.pX = null;
|
---|
| 1612 | this.pY = null;
|
---|
| 1613 | }
|
---|
| 1614 |
|
---|
| 1615 | inherit(PanRecognizer, AttrRecognizer, {
|
---|
| 1616 | /**
|
---|
| 1617 | * @namespace
|
---|
| 1618 | * @memberof PanRecognizer
|
---|
| 1619 | */
|
---|
| 1620 | defaults: {
|
---|
| 1621 | event: 'pan',
|
---|
| 1622 | threshold: 10,
|
---|
| 1623 | pointers: 1,
|
---|
| 1624 | direction: DIRECTION_ALL
|
---|
| 1625 | },
|
---|
| 1626 |
|
---|
| 1627 | getTouchAction: function() {
|
---|
| 1628 | var direction = this.options.direction;
|
---|
| 1629 | var actions = [];
|
---|
| 1630 | if (direction & DIRECTION_HORIZONTAL) {
|
---|
| 1631 | actions.push(TOUCH_ACTION_PAN_Y);
|
---|
| 1632 | }
|
---|
| 1633 | if (direction & DIRECTION_VERTICAL) {
|
---|
| 1634 | actions.push(TOUCH_ACTION_PAN_X);
|
---|
| 1635 | }
|
---|
| 1636 | return actions;
|
---|
| 1637 | },
|
---|
| 1638 |
|
---|
| 1639 | directionTest: function(input) {
|
---|
| 1640 | var options = this.options;
|
---|
| 1641 | var hasMoved = true;
|
---|
| 1642 | var distance = input.distance;
|
---|
| 1643 | var direction = input.direction;
|
---|
| 1644 | var x = input.deltaX;
|
---|
| 1645 | var y = input.deltaY;
|
---|
| 1646 |
|
---|
| 1647 | // lock to axis?
|
---|
| 1648 | if (!(direction & options.direction)) {
|
---|
| 1649 | if (options.direction & DIRECTION_HORIZONTAL) {
|
---|
| 1650 | direction = (x === 0) ? DIRECTION_NONE : (x < 0) ? DIRECTION_LEFT : DIRECTION_RIGHT;
|
---|
| 1651 | hasMoved = x != this.pX;
|
---|
| 1652 | distance = Math.abs(input.deltaX);
|
---|
| 1653 | } else {
|
---|
| 1654 | direction = (y === 0) ? DIRECTION_NONE : (y < 0) ? DIRECTION_UP : DIRECTION_DOWN;
|
---|
| 1655 | hasMoved = y != this.pY;
|
---|
| 1656 | distance = Math.abs(input.deltaY);
|
---|
| 1657 | }
|
---|
| 1658 | }
|
---|
| 1659 | input.direction = direction;
|
---|
| 1660 | return hasMoved && distance > options.threshold && direction & options.direction;
|
---|
| 1661 | },
|
---|
| 1662 |
|
---|
| 1663 | attrTest: function(input) {
|
---|
| 1664 | return AttrRecognizer.prototype.attrTest.call(this, input) &&
|
---|
| 1665 | (this.state & STATE_BEGAN || (!(this.state & STATE_BEGAN) && this.directionTest(input)));
|
---|
| 1666 | },
|
---|
| 1667 |
|
---|
| 1668 | emit: function(input) {
|
---|
| 1669 | this.pX = input.deltaX;
|
---|
| 1670 | this.pY = input.deltaY;
|
---|
| 1671 |
|
---|
| 1672 | var direction = directionStr(input.direction);
|
---|
| 1673 | if (direction) {
|
---|
| 1674 | this.manager.emit(this.options.event + direction, input);
|
---|
| 1675 | }
|
---|
| 1676 |
|
---|
| 1677 | this._super.emit.call(this, input);
|
---|
| 1678 | }
|
---|
| 1679 | });
|
---|
| 1680 |
|
---|
| 1681 | /**
|
---|
| 1682 | * Pinch
|
---|
| 1683 | * Recognized when two or more pointers are moving toward (zoom-in) or away from each other (zoom-out).
|
---|
| 1684 | * @constructor
|
---|
| 1685 | * @extends AttrRecognizer
|
---|
| 1686 | */
|
---|
| 1687 | function PinchRecognizer() {
|
---|
| 1688 | AttrRecognizer.apply(this, arguments);
|
---|
| 1689 | }
|
---|
| 1690 |
|
---|
| 1691 | inherit(PinchRecognizer, AttrRecognizer, {
|
---|
| 1692 | /**
|
---|
| 1693 | * @namespace
|
---|
| 1694 | * @memberof PinchRecognizer
|
---|
| 1695 | */
|
---|
| 1696 | defaults: {
|
---|
| 1697 | event: 'pinch',
|
---|
| 1698 | threshold: 0,
|
---|
| 1699 | pointers: 2
|
---|
| 1700 | },
|
---|
| 1701 |
|
---|
| 1702 | getTouchAction: function() {
|
---|
| 1703 | return [TOUCH_ACTION_NONE];
|
---|
| 1704 | },
|
---|
| 1705 |
|
---|
| 1706 | attrTest: function(input) {
|
---|
| 1707 | return this._super.attrTest.call(this, input) &&
|
---|
| 1708 | (Math.abs(input.scale - 1) > this.options.threshold || this.state & STATE_BEGAN);
|
---|
| 1709 | },
|
---|
| 1710 |
|
---|
| 1711 | emit: function(input) {
|
---|
| 1712 | this._super.emit.call(this, input);
|
---|
| 1713 | if (input.scale !== 1) {
|
---|
| 1714 | var inOut = input.scale < 1 ? 'in' : 'out';
|
---|
| 1715 | this.manager.emit(this.options.event + inOut, input);
|
---|
| 1716 | }
|
---|
| 1717 | }
|
---|
| 1718 | });
|
---|
| 1719 |
|
---|
| 1720 | /**
|
---|
| 1721 | * Press
|
---|
| 1722 | * Recognized when the pointer is down for x ms without any movement.
|
---|
| 1723 | * @constructor
|
---|
| 1724 | * @extends Recognizer
|
---|
| 1725 | */
|
---|
| 1726 | function PressRecognizer() {
|
---|
| 1727 | Recognizer.apply(this, arguments);
|
---|
| 1728 |
|
---|
| 1729 | this._timer = null;
|
---|
| 1730 | this._input = null;
|
---|
| 1731 | }
|
---|
| 1732 |
|
---|
| 1733 | inherit(PressRecognizer, Recognizer, {
|
---|
| 1734 | /**
|
---|
| 1735 | * @namespace
|
---|
| 1736 | * @memberof PressRecognizer
|
---|
| 1737 | */
|
---|
| 1738 | defaults: {
|
---|
| 1739 | event: 'press',
|
---|
| 1740 | pointers: 1,
|
---|
| 1741 | time: 500, // minimal time of the pointer to be pressed
|
---|
| 1742 | threshold: 5 // a minimal movement is ok, but keep it low
|
---|
| 1743 | },
|
---|
| 1744 |
|
---|
| 1745 | getTouchAction: function() {
|
---|
| 1746 | return [TOUCH_ACTION_AUTO];
|
---|
| 1747 | },
|
---|
| 1748 |
|
---|
| 1749 | process: function(input) {
|
---|
| 1750 | var options = this.options;
|
---|
| 1751 | var validPointers = input.pointers.length === options.pointers;
|
---|
| 1752 | var validMovement = input.distance < options.threshold;
|
---|
| 1753 | var validTime = input.deltaTime > options.time;
|
---|
| 1754 |
|
---|
| 1755 | this._input = input;
|
---|
| 1756 |
|
---|
| 1757 | // we only allow little movement
|
---|
| 1758 | // and we've reached an end event, so a tap is possible
|
---|
| 1759 | if (!validMovement || !validPointers || (input.eventType & (INPUT_END | INPUT_CANCEL) && !validTime)) {
|
---|
| 1760 | this.reset();
|
---|
| 1761 | } else if (input.eventType & INPUT_START) {
|
---|
| 1762 | this.reset();
|
---|
| 1763 | this._timer = setTimeoutContext(function() {
|
---|
| 1764 | this.state = STATE_RECOGNIZED;
|
---|
| 1765 | this.tryEmit();
|
---|
| 1766 | }, options.time, this);
|
---|
| 1767 | } else if (input.eventType & INPUT_END) {
|
---|
| 1768 | return STATE_RECOGNIZED;
|
---|
| 1769 | }
|
---|
| 1770 | return STATE_FAILED;
|
---|
| 1771 | },
|
---|
| 1772 |
|
---|
| 1773 | reset: function() {
|
---|
| 1774 | clearTimeout(this._timer);
|
---|
| 1775 | },
|
---|
| 1776 |
|
---|
| 1777 | emit: function(input) {
|
---|
| 1778 | if (this.state !== STATE_RECOGNIZED) {
|
---|
| 1779 | return;
|
---|
| 1780 | }
|
---|
| 1781 |
|
---|
| 1782 | if (input && (input.eventType & INPUT_END)) {
|
---|
| 1783 | this.manager.emit(this.options.event + 'up', input);
|
---|
| 1784 | } else {
|
---|
| 1785 | this._input.timeStamp = now();
|
---|
| 1786 | this.manager.emit(this.options.event, this._input);
|
---|
| 1787 | }
|
---|
| 1788 | }
|
---|
| 1789 | });
|
---|
| 1790 |
|
---|
| 1791 | /**
|
---|
| 1792 | * Rotate
|
---|
| 1793 | * Recognized when two or more pointer are moving in a circular motion.
|
---|
| 1794 | * @constructor
|
---|
| 1795 | * @extends AttrRecognizer
|
---|
| 1796 | */
|
---|
| 1797 | function RotateRecognizer() {
|
---|
| 1798 | AttrRecognizer.apply(this, arguments);
|
---|
| 1799 | }
|
---|
| 1800 |
|
---|
| 1801 | inherit(RotateRecognizer, AttrRecognizer, {
|
---|
| 1802 | /**
|
---|
| 1803 | * @namespace
|
---|
| 1804 | * @memberof RotateRecognizer
|
---|
| 1805 | */
|
---|
| 1806 | defaults: {
|
---|
| 1807 | event: 'rotate',
|
---|
| 1808 | threshold: 0,
|
---|
| 1809 | pointers: 2
|
---|
| 1810 | },
|
---|
| 1811 |
|
---|
| 1812 | getTouchAction: function() {
|
---|
| 1813 | return [TOUCH_ACTION_NONE];
|
---|
| 1814 | },
|
---|
| 1815 |
|
---|
| 1816 | attrTest: function(input) {
|
---|
| 1817 | return this._super.attrTest.call(this, input) &&
|
---|
| 1818 | (Math.abs(input.rotation) > this.options.threshold || this.state & STATE_BEGAN);
|
---|
| 1819 | }
|
---|
| 1820 | });
|
---|
| 1821 |
|
---|
| 1822 | /**
|
---|
| 1823 | * Swipe
|
---|
| 1824 | * Recognized when the pointer is moving fast (velocity), with enough distance in the allowed direction.
|
---|
| 1825 | * @constructor
|
---|
| 1826 | * @extends AttrRecognizer
|
---|
| 1827 | */
|
---|
| 1828 | function SwipeRecognizer() {
|
---|
| 1829 | AttrRecognizer.apply(this, arguments);
|
---|
| 1830 | }
|
---|
| 1831 |
|
---|
| 1832 | inherit(SwipeRecognizer, AttrRecognizer, {
|
---|
| 1833 | /**
|
---|
| 1834 | * @namespace
|
---|
| 1835 | * @memberof SwipeRecognizer
|
---|
| 1836 | */
|
---|
| 1837 | defaults: {
|
---|
| 1838 | event: 'swipe',
|
---|
| 1839 | threshold: 10,
|
---|
| 1840 | velocity: 0.65,
|
---|
| 1841 | direction: DIRECTION_HORIZONTAL | DIRECTION_VERTICAL,
|
---|
| 1842 | pointers: 1
|
---|
| 1843 | },
|
---|
| 1844 |
|
---|
| 1845 | getTouchAction: function() {
|
---|
| 1846 | return PanRecognizer.prototype.getTouchAction.call(this);
|
---|
| 1847 | },
|
---|
| 1848 |
|
---|
| 1849 | attrTest: function(input) {
|
---|
| 1850 | var direction = this.options.direction;
|
---|
| 1851 | var velocity;
|
---|
| 1852 |
|
---|
| 1853 | if (direction & (DIRECTION_HORIZONTAL | DIRECTION_VERTICAL)) {
|
---|
| 1854 | velocity = input.velocity;
|
---|
| 1855 | } else if (direction & DIRECTION_HORIZONTAL) {
|
---|
| 1856 | velocity = input.velocityX;
|
---|
| 1857 | } else if (direction & DIRECTION_VERTICAL) {
|
---|
| 1858 | velocity = input.velocityY;
|
---|
| 1859 | }
|
---|
| 1860 |
|
---|
| 1861 | return this._super.attrTest.call(this, input) &&
|
---|
| 1862 | direction & input.direction &&
|
---|
| 1863 | input.distance > this.options.threshold &&
|
---|
| 1864 | abs(velocity) > this.options.velocity && input.eventType & INPUT_END;
|
---|
| 1865 | },
|
---|
| 1866 |
|
---|
| 1867 | emit: function(input) {
|
---|
| 1868 | var direction = directionStr(input.direction);
|
---|
| 1869 | if (direction) {
|
---|
| 1870 | this.manager.emit(this.options.event + direction, input);
|
---|
| 1871 | }
|
---|
| 1872 |
|
---|
| 1873 | this.manager.emit(this.options.event, input);
|
---|
| 1874 | }
|
---|
| 1875 | });
|
---|
| 1876 |
|
---|
| 1877 | /**
|
---|
| 1878 | * A tap is ecognized when the pointer is doing a small tap/click. Multiple taps are recognized if they occur
|
---|
| 1879 | * between the given interval and position. The delay option can be used to recognize multi-taps without firing
|
---|
| 1880 | * a single tap.
|
---|
| 1881 | *
|
---|
| 1882 | * The eventData from the emitted event contains the property `tapCount`, which contains the amount of
|
---|
| 1883 | * multi-taps being recognized.
|
---|
| 1884 | * @constructor
|
---|
| 1885 | * @extends Recognizer
|
---|
| 1886 | */
|
---|
| 1887 | function TapRecognizer() {
|
---|
| 1888 | Recognizer.apply(this, arguments);
|
---|
| 1889 |
|
---|
| 1890 | // previous time and center,
|
---|
| 1891 | // used for tap counting
|
---|
| 1892 | this.pTime = false;
|
---|
| 1893 | this.pCenter = false;
|
---|
| 1894 |
|
---|
| 1895 | this._timer = null;
|
---|
| 1896 | this._input = null;
|
---|
| 1897 | this.count = 0;
|
---|
| 1898 | }
|
---|
| 1899 |
|
---|
| 1900 | inherit(TapRecognizer, Recognizer, {
|
---|
| 1901 | /**
|
---|
| 1902 | * @namespace
|
---|
| 1903 | * @memberof PinchRecognizer
|
---|
| 1904 | */
|
---|
| 1905 | defaults: {
|
---|
| 1906 | event: 'tap',
|
---|
| 1907 | pointers: 1,
|
---|
| 1908 | taps: 1,
|
---|
| 1909 | interval: 300, // max time between the multi-tap taps
|
---|
| 1910 | time: 250, // max time of the pointer to be down (like finger on the screen)
|
---|
| 1911 | threshold: 2, // a minimal movement is ok, but keep it low
|
---|
| 1912 | posThreshold: 10 // a multi-tap can be a bit off the initial position
|
---|
| 1913 | },
|
---|
| 1914 |
|
---|
| 1915 | getTouchAction: function() {
|
---|
| 1916 | return [TOUCH_ACTION_MANIPULATION];
|
---|
| 1917 | },
|
---|
| 1918 |
|
---|
| 1919 | process: function(input) {
|
---|
| 1920 | var options = this.options;
|
---|
| 1921 |
|
---|
| 1922 | var validPointers = input.pointers.length === options.pointers;
|
---|
| 1923 | var validMovement = input.distance < options.threshold;
|
---|
| 1924 | var validTouchTime = input.deltaTime < options.time;
|
---|
| 1925 |
|
---|
| 1926 | this.reset();
|
---|
| 1927 |
|
---|
| 1928 | if ((input.eventType & INPUT_START) && (this.count === 0)) {
|
---|
| 1929 | return this.failTimeout();
|
---|
| 1930 | }
|
---|
| 1931 |
|
---|
| 1932 | // we only allow little movement
|
---|
| 1933 | // and we've reached an end event, so a tap is possible
|
---|
| 1934 | if (validMovement && validTouchTime && validPointers) {
|
---|
| 1935 | if (input.eventType != INPUT_END) {
|
---|
| 1936 | return this.failTimeout();
|
---|
| 1937 | }
|
---|
| 1938 |
|
---|
| 1939 | var validInterval = this.pTime ? (input.timeStamp - this.pTime < options.interval) : true;
|
---|
| 1940 | var validMultiTap = !this.pCenter || getDistance(this.pCenter, input.center) < options.posThreshold;
|
---|
| 1941 |
|
---|
| 1942 | this.pTime = input.timeStamp;
|
---|
| 1943 | this.pCenter = input.center;
|
---|
| 1944 |
|
---|
| 1945 | if (!validMultiTap || !validInterval) {
|
---|
| 1946 | this.count = 1;
|
---|
| 1947 | } else {
|
---|
| 1948 | this.count += 1;
|
---|
| 1949 | }
|
---|
| 1950 |
|
---|
| 1951 | this._input = input;
|
---|
| 1952 |
|
---|
| 1953 | // if tap count matches we have recognized it,
|
---|
| 1954 | // else it has began recognizing...
|
---|
| 1955 | var tapCount = this.count % options.taps;
|
---|
| 1956 | if (tapCount === 0) {
|
---|
| 1957 | // no failing requirements, immediately trigger the tap event
|
---|
| 1958 | // or wait as long as the multitap interval to trigger
|
---|
| 1959 | if (!this.hasRequireFailures()) {
|
---|
| 1960 | return STATE_RECOGNIZED;
|
---|
| 1961 | } else {
|
---|
| 1962 | this._timer = setTimeoutContext(function() {
|
---|
| 1963 | this.state = STATE_RECOGNIZED;
|
---|
| 1964 | this.tryEmit();
|
---|
| 1965 | }, options.interval, this);
|
---|
| 1966 | return STATE_BEGAN;
|
---|
| 1967 | }
|
---|
| 1968 | }
|
---|
| 1969 | }
|
---|
| 1970 | return STATE_FAILED;
|
---|
| 1971 | },
|
---|
| 1972 |
|
---|
| 1973 | failTimeout: function() {
|
---|
| 1974 | this._timer = setTimeoutContext(function() {
|
---|
| 1975 | this.state = STATE_FAILED;
|
---|
| 1976 | }, this.options.interval, this);
|
---|
| 1977 | return STATE_FAILED;
|
---|
| 1978 | },
|
---|
| 1979 |
|
---|
| 1980 | reset: function() {
|
---|
| 1981 | clearTimeout(this._timer);
|
---|
| 1982 | },
|
---|
| 1983 |
|
---|
| 1984 | emit: function() {
|
---|
| 1985 | if (this.state == STATE_RECOGNIZED ) {
|
---|
| 1986 | this._input.tapCount = this.count;
|
---|
| 1987 | this.manager.emit(this.options.event, this._input);
|
---|
| 1988 | }
|
---|
| 1989 | }
|
---|
| 1990 | });
|
---|
| 1991 |
|
---|
| 1992 | /**
|
---|
| 1993 | * Simple way to create an manager with a default set of recognizers.
|
---|
| 1994 | * @param {HTMLElement} element
|
---|
| 1995 | * @param {Object} [options]
|
---|
| 1996 | * @constructor
|
---|
| 1997 | */
|
---|
| 1998 | function Hammer(element, options) {
|
---|
| 1999 | options = options || {};
|
---|
| 2000 | options.recognizers = ifUndefined(options.recognizers, Hammer.defaults.preset);
|
---|
| 2001 | return new Manager(element, options);
|
---|
| 2002 | }
|
---|
| 2003 |
|
---|
| 2004 | /**
|
---|
| 2005 | * @const {string}
|
---|
| 2006 | */
|
---|
| 2007 | Hammer.VERSION = '2.0.4';
|
---|
| 2008 |
|
---|
| 2009 | /**
|
---|
| 2010 | * default settings
|
---|
| 2011 | * @namespace
|
---|
| 2012 | */
|
---|
| 2013 | Hammer.defaults = {
|
---|
| 2014 | /**
|
---|
| 2015 | * set if DOM events are being triggered.
|
---|
| 2016 | * But this is slower and unused by simple implementations, so disabled by default.
|
---|
| 2017 | * @type {Boolean}
|
---|
| 2018 | * @default false
|
---|
| 2019 | */
|
---|
| 2020 | domEvents: false,
|
---|
| 2021 |
|
---|
| 2022 | /**
|
---|
| 2023 | * The value for the touchAction property/fallback.
|
---|
| 2024 | * When set to `compute` it will magically set the correct value based on the added recognizers.
|
---|
| 2025 | * @type {String}
|
---|
| 2026 | * @default compute
|
---|
| 2027 | */
|
---|
| 2028 | touchAction: TOUCH_ACTION_COMPUTE,
|
---|
| 2029 |
|
---|
| 2030 | /**
|
---|
| 2031 | * @type {Boolean}
|
---|
| 2032 | * @default true
|
---|
| 2033 | */
|
---|
| 2034 | enable: true,
|
---|
| 2035 |
|
---|
| 2036 | /**
|
---|
| 2037 | * EXPERIMENTAL FEATURE -- can be removed/changed
|
---|
| 2038 | * Change the parent input target element.
|
---|
| 2039 | * If Null, then it is being set the to main element.
|
---|
| 2040 | * @type {Null|EventTarget}
|
---|
| 2041 | * @default null
|
---|
| 2042 | */
|
---|
| 2043 | inputTarget: null,
|
---|
| 2044 |
|
---|
| 2045 | /**
|
---|
| 2046 | * force an input class
|
---|
| 2047 | * @type {Null|Function}
|
---|
| 2048 | * @default null
|
---|
| 2049 | */
|
---|
| 2050 | inputClass: null,
|
---|
| 2051 |
|
---|
| 2052 | /**
|
---|
| 2053 | * Default recognizer setup when calling `Hammer()`
|
---|
| 2054 | * When creating a new Manager these will be skipped.
|
---|
| 2055 | * @type {Array}
|
---|
| 2056 | */
|
---|
| 2057 | preset: [
|
---|
| 2058 | // RecognizerClass, options, [recognizeWith, ...], [requireFailure, ...]
|
---|
| 2059 | [RotateRecognizer, { enable: false }],
|
---|
| 2060 | [PinchRecognizer, { enable: false }, ['rotate']],
|
---|
| 2061 | [SwipeRecognizer,{ direction: DIRECTION_HORIZONTAL }],
|
---|
| 2062 | [PanRecognizer, { direction: DIRECTION_HORIZONTAL }, ['swipe']],
|
---|
| 2063 | [TapRecognizer],
|
---|
| 2064 | [TapRecognizer, { event: 'doubletap', taps: 2 }, ['tap']],
|
---|
| 2065 | [PressRecognizer]
|
---|
| 2066 | ],
|
---|
| 2067 |
|
---|
| 2068 | /**
|
---|
| 2069 | * Some CSS properties can be used to improve the working of Hammer.
|
---|
| 2070 | * Add them to this method and they will be set when creating a new Manager.
|
---|
| 2071 | * @namespace
|
---|
| 2072 | */
|
---|
| 2073 | cssProps: {
|
---|
| 2074 | /**
|
---|
| 2075 | * Disables text selection to improve the dragging gesture. Mainly for desktop browsers.
|
---|
| 2076 | * @type {String}
|
---|
| 2077 | * @default 'none'
|
---|
| 2078 | */
|
---|
| 2079 | userSelect: 'none',
|
---|
| 2080 |
|
---|
| 2081 | /**
|
---|
| 2082 | * Disable the Windows Phone grippers when pressing an element.
|
---|
| 2083 | * @type {String}
|
---|
| 2084 | * @default 'none'
|
---|
| 2085 | */
|
---|
| 2086 | touchSelect: 'none',
|
---|
| 2087 |
|
---|
| 2088 | /**
|
---|
| 2089 | * Disables the default callout shown when you touch and hold a touch target.
|
---|
| 2090 | * On iOS, when you touch and hold a touch target such as a link, Safari displays
|
---|
| 2091 | * a callout containing information about the link. This property allows you to disable that callout.
|
---|
| 2092 | * @type {String}
|
---|
| 2093 | * @default 'none'
|
---|
| 2094 | */
|
---|
| 2095 | touchCallout: 'none',
|
---|
| 2096 |
|
---|
| 2097 | /**
|
---|
| 2098 | * Specifies whether zooming is enabled. Used by IE10>
|
---|
| 2099 | * @type {String}
|
---|
| 2100 | * @default 'none'
|
---|
| 2101 | */
|
---|
| 2102 | contentZooming: 'none',
|
---|
| 2103 |
|
---|
| 2104 | /**
|
---|
| 2105 | * Specifies that an entire element should be draggable instead of its contents. Mainly for desktop browsers.
|
---|
| 2106 | * @type {String}
|
---|
| 2107 | * @default 'none'
|
---|
| 2108 | */
|
---|
| 2109 | userDrag: 'none',
|
---|
| 2110 |
|
---|
| 2111 | /**
|
---|
| 2112 | * Overrides the highlight color shown when the user taps a link or a JavaScript
|
---|
| 2113 | * clickable element in iOS. This property obeys the alpha value, if specified.
|
---|
| 2114 | * @type {String}
|
---|
| 2115 | * @default 'rgba(0,0,0,0)'
|
---|
| 2116 | */
|
---|
| 2117 | tapHighlightColor: 'rgba(0,0,0,0)'
|
---|
| 2118 | }
|
---|
| 2119 | };
|
---|
| 2120 |
|
---|
| 2121 | var STOP = 1;
|
---|
| 2122 | var FORCED_STOP = 2;
|
---|
| 2123 |
|
---|
| 2124 | /**
|
---|
| 2125 | * Manager
|
---|
| 2126 | * @param {HTMLElement} element
|
---|
| 2127 | * @param {Object} [options]
|
---|
| 2128 | * @constructor
|
---|
| 2129 | */
|
---|
| 2130 | function Manager(element, options) {
|
---|
| 2131 | options = options || {};
|
---|
| 2132 |
|
---|
| 2133 | this.options = merge(options, Hammer.defaults);
|
---|
| 2134 | this.options.inputTarget = this.options.inputTarget || element;
|
---|
| 2135 |
|
---|
| 2136 | this.handlers = {};
|
---|
| 2137 | this.session = {};
|
---|
| 2138 | this.recognizers = [];
|
---|
| 2139 |
|
---|
| 2140 | this.element = element;
|
---|
| 2141 | this.input = createInputInstance(this);
|
---|
| 2142 | this.touchAction = new TouchAction(this, this.options.touchAction);
|
---|
| 2143 |
|
---|
| 2144 | toggleCssProps(this, true);
|
---|
| 2145 |
|
---|
| 2146 | each(options.recognizers, function(item) {
|
---|
| 2147 | var recognizer = this.add(new (item[0])(item[1]));
|
---|
| 2148 | item[2] && recognizer.recognizeWith(item[2]);
|
---|
| 2149 | item[3] && recognizer.requireFailure(item[3]);
|
---|
| 2150 | }, this);
|
---|
| 2151 | }
|
---|
| 2152 |
|
---|
| 2153 | Manager.prototype = {
|
---|
| 2154 | /**
|
---|
| 2155 | * set options
|
---|
| 2156 | * @param {Object} options
|
---|
| 2157 | * @returns {Manager}
|
---|
| 2158 | */
|
---|
| 2159 | set: function(options) {
|
---|
| 2160 | extend(this.options, options);
|
---|
| 2161 |
|
---|
| 2162 | // Options that need a little more setup
|
---|
| 2163 | if (options.touchAction) {
|
---|
| 2164 | this.touchAction.update();
|
---|
| 2165 | }
|
---|
| 2166 | if (options.inputTarget) {
|
---|
| 2167 | // Clean up existing event listeners and reinitialize
|
---|
| 2168 | this.input.destroy();
|
---|
| 2169 | this.input.target = options.inputTarget;
|
---|
| 2170 | this.input.init();
|
---|
| 2171 | }
|
---|
| 2172 | return this;
|
---|
| 2173 | },
|
---|
| 2174 |
|
---|
| 2175 | /**
|
---|
| 2176 | * stop recognizing for this session.
|
---|
| 2177 | * This session will be discarded, when a new [input]start event is fired.
|
---|
| 2178 | * When forced, the recognizer cycle is stopped immediately.
|
---|
| 2179 | * @param {Boolean} [force]
|
---|
| 2180 | */
|
---|
| 2181 | stop: function(force) {
|
---|
| 2182 | this.session.stopped = force ? FORCED_STOP : STOP;
|
---|
| 2183 | },
|
---|
| 2184 |
|
---|
| 2185 | /**
|
---|
| 2186 | * run the recognizers!
|
---|
| 2187 | * called by the inputHandler function on every movement of the pointers (touches)
|
---|
| 2188 | * it walks through all the recognizers and tries to detect the gesture that is being made
|
---|
| 2189 | * @param {Object} inputData
|
---|
| 2190 | */
|
---|
| 2191 | recognize: function(inputData) {
|
---|
| 2192 | var session = this.session;
|
---|
| 2193 | if (session.stopped) {
|
---|
| 2194 | return;
|
---|
| 2195 | }
|
---|
| 2196 |
|
---|
| 2197 | // run the touch-action polyfill
|
---|
| 2198 | this.touchAction.preventDefaults(inputData);
|
---|
| 2199 |
|
---|
| 2200 | var recognizer;
|
---|
| 2201 | var recognizers = this.recognizers;
|
---|
| 2202 |
|
---|
| 2203 | // this holds the recognizer that is being recognized.
|
---|
| 2204 | // so the recognizer's state needs to be BEGAN, CHANGED, ENDED or RECOGNIZED
|
---|
| 2205 | // if no recognizer is detecting a thing, it is set to `null`
|
---|
| 2206 | var curRecognizer = session.curRecognizer;
|
---|
| 2207 |
|
---|
| 2208 | // reset when the last recognizer is recognized
|
---|
| 2209 | // or when we're in a new session
|
---|
| 2210 | if (!curRecognizer || (curRecognizer && curRecognizer.state & STATE_RECOGNIZED)) {
|
---|
| 2211 | curRecognizer = session.curRecognizer = null;
|
---|
| 2212 | }
|
---|
| 2213 |
|
---|
| 2214 | var i = 0;
|
---|
| 2215 | while (i < recognizers.length) {
|
---|
| 2216 | recognizer = recognizers[i];
|
---|
| 2217 |
|
---|
| 2218 | // find out if we are allowed try to recognize the input for this one.
|
---|
| 2219 | // 1. allow if the session is NOT forced stopped (see the .stop() method)
|
---|
| 2220 | // 2. allow if we still haven't recognized a gesture in this session, or the this recognizer is the one
|
---|
| 2221 | // that is being recognized.
|
---|
| 2222 | // 3. allow if the recognizer is allowed to run simultaneous with the current recognized recognizer.
|
---|
| 2223 | // this can be setup with the `recognizeWith()` method on the recognizer.
|
---|
| 2224 | if (session.stopped !== FORCED_STOP && ( // 1
|
---|
| 2225 | !curRecognizer || recognizer == curRecognizer || // 2
|
---|
| 2226 | recognizer.canRecognizeWith(curRecognizer))) { // 3
|
---|
| 2227 | recognizer.recognize(inputData);
|
---|
| 2228 | } else {
|
---|
| 2229 | recognizer.reset();
|
---|
| 2230 | }
|
---|
| 2231 |
|
---|
| 2232 | // if the recognizer has been recognizing the input as a valid gesture, we want to store this one as the
|
---|
| 2233 | // current active recognizer. but only if we don't already have an active recognizer
|
---|
| 2234 | if (!curRecognizer && recognizer.state & (STATE_BEGAN | STATE_CHANGED | STATE_ENDED)) {
|
---|
| 2235 | curRecognizer = session.curRecognizer = recognizer;
|
---|
| 2236 | }
|
---|
| 2237 | i++;
|
---|
| 2238 | }
|
---|
| 2239 | },
|
---|
| 2240 |
|
---|
| 2241 | /**
|
---|
| 2242 | * get a recognizer by its event name.
|
---|
| 2243 | * @param {Recognizer|String} recognizer
|
---|
| 2244 | * @returns {Recognizer|Null}
|
---|
| 2245 | */
|
---|
| 2246 | get: function(recognizer) {
|
---|
| 2247 | if (recognizer instanceof Recognizer) {
|
---|
| 2248 | return recognizer;
|
---|
| 2249 | }
|
---|
| 2250 |
|
---|
| 2251 | var recognizers = this.recognizers;
|
---|
| 2252 | for (var i = 0; i < recognizers.length; i++) {
|
---|
| 2253 | if (recognizers[i].options.event == recognizer) {
|
---|
| 2254 | return recognizers[i];
|
---|
| 2255 | }
|
---|
| 2256 | }
|
---|
| 2257 | return null;
|
---|
| 2258 | },
|
---|
| 2259 |
|
---|
| 2260 | /**
|
---|
| 2261 | * add a recognizer to the manager
|
---|
| 2262 | * existing recognizers with the same event name will be removed
|
---|
| 2263 | * @param {Recognizer} recognizer
|
---|
| 2264 | * @returns {Recognizer|Manager}
|
---|
| 2265 | */
|
---|
| 2266 | add: function(recognizer) {
|
---|
| 2267 | if (invokeArrayArg(recognizer, 'add', this)) {
|
---|
| 2268 | return this;
|
---|
| 2269 | }
|
---|
| 2270 |
|
---|
| 2271 | // remove existing
|
---|
| 2272 | var existing = this.get(recognizer.options.event);
|
---|
| 2273 | if (existing) {
|
---|
| 2274 | this.remove(existing);
|
---|
| 2275 | }
|
---|
| 2276 |
|
---|
| 2277 | this.recognizers.push(recognizer);
|
---|
| 2278 | recognizer.manager = this;
|
---|
| 2279 |
|
---|
| 2280 | this.touchAction.update();
|
---|
| 2281 | return recognizer;
|
---|
| 2282 | },
|
---|
| 2283 |
|
---|
| 2284 | /**
|
---|
| 2285 | * remove a recognizer by name or instance
|
---|
| 2286 | * @param {Recognizer|String} recognizer
|
---|
| 2287 | * @returns {Manager}
|
---|
| 2288 | */
|
---|
| 2289 | remove: function(recognizer) {
|
---|
| 2290 | if (invokeArrayArg(recognizer, 'remove', this)) {
|
---|
| 2291 | return this;
|
---|
| 2292 | }
|
---|
| 2293 |
|
---|
| 2294 | var recognizers = this.recognizers;
|
---|
| 2295 | recognizer = this.get(recognizer);
|
---|
| 2296 | recognizers.splice(inArray(recognizers, recognizer), 1);
|
---|
| 2297 |
|
---|
| 2298 | this.touchAction.update();
|
---|
| 2299 | return this;
|
---|
| 2300 | },
|
---|
| 2301 |
|
---|
| 2302 | /**
|
---|
| 2303 | * bind event
|
---|
| 2304 | * @param {String} events
|
---|
| 2305 | * @param {Function} handler
|
---|
| 2306 | * @returns {EventEmitter} this
|
---|
| 2307 | */
|
---|
| 2308 | on: function(events, handler) {
|
---|
| 2309 | var handlers = this.handlers;
|
---|
| 2310 | each(splitStr(events), function(event) {
|
---|
| 2311 | handlers[event] = handlers[event] || [];
|
---|
| 2312 | handlers[event].push(handler);
|
---|
| 2313 | });
|
---|
| 2314 | return this;
|
---|
| 2315 | },
|
---|
| 2316 |
|
---|
| 2317 | /**
|
---|
| 2318 | * unbind event, leave emit blank to remove all handlers
|
---|
| 2319 | * @param {String} events
|
---|
| 2320 | * @param {Function} [handler]
|
---|
| 2321 | * @returns {EventEmitter} this
|
---|
| 2322 | */
|
---|
| 2323 | off: function(events, handler) {
|
---|
| 2324 | var handlers = this.handlers;
|
---|
| 2325 | each(splitStr(events), function(event) {
|
---|
| 2326 | if (!handler) {
|
---|
| 2327 | delete handlers[event];
|
---|
| 2328 | } else {
|
---|
| 2329 | handlers[event].splice(inArray(handlers[event], handler), 1);
|
---|
| 2330 | }
|
---|
| 2331 | });
|
---|
| 2332 | return this;
|
---|
| 2333 | },
|
---|
| 2334 |
|
---|
| 2335 | /**
|
---|
| 2336 | * emit event to the listeners
|
---|
| 2337 | * @param {String} event
|
---|
| 2338 | * @param {Object} data
|
---|
| 2339 | */
|
---|
| 2340 | emit: function(event, data) {
|
---|
| 2341 | // we also want to trigger dom events
|
---|
| 2342 | if (this.options.domEvents) {
|
---|
| 2343 | triggerDomEvent(event, data);
|
---|
| 2344 | }
|
---|
| 2345 |
|
---|
| 2346 | // no handlers, so skip it all
|
---|
| 2347 | var handlers = this.handlers[event] && this.handlers[event].slice();
|
---|
| 2348 | if (!handlers || !handlers.length) {
|
---|
| 2349 | return;
|
---|
| 2350 | }
|
---|
| 2351 |
|
---|
| 2352 | data.type = event;
|
---|
| 2353 | data.preventDefault = function() {
|
---|
| 2354 | data.srcEvent.preventDefault();
|
---|
| 2355 | };
|
---|
| 2356 |
|
---|
| 2357 | var i = 0;
|
---|
| 2358 | while (i < handlers.length) {
|
---|
| 2359 | handlers[i](data);
|
---|
| 2360 | i++;
|
---|
| 2361 | }
|
---|
| 2362 | },
|
---|
| 2363 |
|
---|
| 2364 | /**
|
---|
| 2365 | * destroy the manager and unbinds all events
|
---|
| 2366 | * it doesn't unbind dom events, that is the user own responsibility
|
---|
| 2367 | */
|
---|
| 2368 | destroy: function() {
|
---|
| 2369 | this.element && toggleCssProps(this, false);
|
---|
| 2370 |
|
---|
| 2371 | this.handlers = {};
|
---|
| 2372 | this.session = {};
|
---|
| 2373 | this.input.destroy();
|
---|
| 2374 | this.element = null;
|
---|
| 2375 | }
|
---|
| 2376 | };
|
---|
| 2377 |
|
---|
| 2378 | /**
|
---|
| 2379 | * add/remove the css properties as defined in manager.options.cssProps
|
---|
| 2380 | * @param {Manager} manager
|
---|
| 2381 | * @param {Boolean} add
|
---|
| 2382 | */
|
---|
| 2383 | function toggleCssProps(manager, add) {
|
---|
| 2384 | var element = manager.element;
|
---|
| 2385 | each(manager.options.cssProps, function(value, name) {
|
---|
| 2386 | element.style[prefixed(element.style, name)] = add ? value : '';
|
---|
| 2387 | });
|
---|
| 2388 | }
|
---|
| 2389 |
|
---|
| 2390 | /**
|
---|
| 2391 | * trigger dom event
|
---|
| 2392 | * @param {String} event
|
---|
| 2393 | * @param {Object} data
|
---|
| 2394 | */
|
---|
| 2395 | function triggerDomEvent(event, data) {
|
---|
| 2396 | var gestureEvent = document.createEvent('Event');
|
---|
| 2397 | gestureEvent.initEvent(event, true, true);
|
---|
| 2398 | gestureEvent.gesture = data;
|
---|
| 2399 | data.target.dispatchEvent(gestureEvent);
|
---|
| 2400 | }
|
---|
| 2401 |
|
---|
| 2402 | extend(Hammer, {
|
---|
| 2403 | INPUT_START: INPUT_START,
|
---|
| 2404 | INPUT_MOVE: INPUT_MOVE,
|
---|
| 2405 | INPUT_END: INPUT_END,
|
---|
| 2406 | INPUT_CANCEL: INPUT_CANCEL,
|
---|
| 2407 |
|
---|
| 2408 | STATE_POSSIBLE: STATE_POSSIBLE,
|
---|
| 2409 | STATE_BEGAN: STATE_BEGAN,
|
---|
| 2410 | STATE_CHANGED: STATE_CHANGED,
|
---|
| 2411 | STATE_ENDED: STATE_ENDED,
|
---|
| 2412 | STATE_RECOGNIZED: STATE_RECOGNIZED,
|
---|
| 2413 | STATE_CANCELLED: STATE_CANCELLED,
|
---|
| 2414 | STATE_FAILED: STATE_FAILED,
|
---|
| 2415 |
|
---|
| 2416 | DIRECTION_NONE: DIRECTION_NONE,
|
---|
| 2417 | DIRECTION_LEFT: DIRECTION_LEFT,
|
---|
| 2418 | DIRECTION_RIGHT: DIRECTION_RIGHT,
|
---|
| 2419 | DIRECTION_UP: DIRECTION_UP,
|
---|
| 2420 | DIRECTION_DOWN: DIRECTION_DOWN,
|
---|
| 2421 | DIRECTION_HORIZONTAL: DIRECTION_HORIZONTAL,
|
---|
| 2422 | DIRECTION_VERTICAL: DIRECTION_VERTICAL,
|
---|
| 2423 | DIRECTION_ALL: DIRECTION_ALL,
|
---|
| 2424 |
|
---|
| 2425 | Manager: Manager,
|
---|
| 2426 | Input: Input,
|
---|
| 2427 | TouchAction: TouchAction,
|
---|
| 2428 |
|
---|
| 2429 | TouchInput: TouchInput,
|
---|
| 2430 | MouseInput: MouseInput,
|
---|
| 2431 | PointerEventInput: PointerEventInput,
|
---|
| 2432 | TouchMouseInput: TouchMouseInput,
|
---|
| 2433 | SingleTouchInput: SingleTouchInput,
|
---|
| 2434 |
|
---|
| 2435 | Recognizer: Recognizer,
|
---|
| 2436 | AttrRecognizer: AttrRecognizer,
|
---|
| 2437 | Tap: TapRecognizer,
|
---|
| 2438 | Pan: PanRecognizer,
|
---|
| 2439 | Swipe: SwipeRecognizer,
|
---|
| 2440 | Pinch: PinchRecognizer,
|
---|
| 2441 | Rotate: RotateRecognizer,
|
---|
| 2442 | Press: PressRecognizer,
|
---|
| 2443 |
|
---|
| 2444 | on: addEventListeners,
|
---|
| 2445 | off: removeEventListeners,
|
---|
| 2446 | each: each,
|
---|
| 2447 | merge: merge,
|
---|
| 2448 | extend: extend,
|
---|
| 2449 | inherit: inherit,
|
---|
| 2450 | bindFn: bindFn,
|
---|
| 2451 | prefixed: prefixed
|
---|
| 2452 | });
|
---|
| 2453 |
|
---|
| 2454 | if (typeof module != 'undefined' && module.exports) {
|
---|
| 2455 | module.exports = Hammer;
|
---|
| 2456 | } else {
|
---|
| 2457 | window[exportName] = Hammer;
|
---|
| 2458 | }
|
---|
| 2459 |
|
---|
| 2460 | })(window, document, 'Hammer');
|
---|