l7hammerjs
Version:
A javascript library for multi-touch gestures
1,762 lines (1,504 loc) • 88.3 kB
JavaScript
/*! L7 Hammer.JS - v0.0.4 - 2021-10-29
*
*
* Copyright (c) Jorik Tangelder;
* Licensed under the MIT license */
(function(window, document, exportName, undefined) {
'use strict';
/**
* @private
* use the val2 when val1 is undefined
* @param {*} val1
* @param {*} val2
* @returns {*}
*/
function ifUndefined(val1, val2) {
return val1 === undefined ? val2 : val1;
}
// 判断支付宝小程序环境
var isMiniAli = typeof my !== 'undefined' && !!my && typeof my.showToast === 'function';
// 判断微信小程序环境
var isWeChatMiniProgram = typeof wx !== 'undefined' && wx !== null && (typeof wx.request !== 'undefined' || typeof wx.miniProgram !== 'undefined');
var isMini = isMiniAli || isWeChatMiniProgram;
var VENDOR_PREFIXES = ['', 'webkit', 'Moz', 'MS', 'ms', 'o'];
// const TEST_ELEMENT = document.createElement('div');
var TEST_ELEMENT = isMini ? '' : document.createElement('div');
var TYPE_FUNCTION = 'function';
var round = Math.round,
abs = Math.abs;
var now = Date.now;
/**
* @private
* get the prefixed property
* @param {Object} obj
* @param {String} property
* @returns {String|Undefined} prefixed
*/
function prefixed(obj, property) {
var prefix = void 0;
var prop = void 0;
var camelProp = property[0].toUpperCase() + property.slice(1);
var i = 0;
while (i < VENDOR_PREFIXES.length) {
prefix = VENDOR_PREFIXES[i];
prop = prefix ? prefix + camelProp : property;
if (prop in obj) {
return prop;
}
i++;
}
return undefined;
}
function getTouchActionProps() {
if (!NATIVE_TOUCH_ACTION) {
return false;
}
var touchMap = {};
if (isMini) {
return touchMap;
}
var cssSupports = window.CSS && window.CSS.supports;
['auto', 'manipulation', 'pan-y', 'pan-x', 'pan-x pan-y', 'none'].forEach(function (val) {
// If css.supports is not supported but there is native touch-action assume it supports
// all values. This is the case for IE 10 and 11.
return touchMap[val] = cssSupports ? window.CSS.supports('touch-action', val) : true;
});
return touchMap;
}
var PREFIXED_TOUCH_ACTION = isMini ? undefined : prefixed(TEST_ELEMENT.style, 'touchAction');
var NATIVE_TOUCH_ACTION = PREFIXED_TOUCH_ACTION !== undefined;
// magical touchAction value
var TOUCH_ACTION_COMPUTE = 'compute';
var TOUCH_ACTION_AUTO = 'auto';
var TOUCH_ACTION_MANIPULATION = 'manipulation'; // not implemented
var TOUCH_ACTION_NONE = 'none';
var TOUCH_ACTION_PAN_X = 'pan-x';
var TOUCH_ACTION_PAN_Y = 'pan-y';
var TOUCH_ACTION_MAP = getTouchActionProps();
var MOBILE_REGEX = /mobile|tablet|ip(ad|hone|od)|android/i;
var SUPPORT_TOUCH = 'ontouchstart' in window;
var SUPPORT_POINTER_EVENTS = prefixed(window, 'PointerEvent') !== undefined;
var SUPPORT_ONLY_TOUCH = SUPPORT_TOUCH && MOBILE_REGEX.test(navigator.userAgent);
var INPUT_TYPE_TOUCH = 'touch';
var INPUT_TYPE_PEN = 'pen';
var INPUT_TYPE_MOUSE = 'mouse';
var INPUT_TYPE_KINECT = 'kinect';
var COMPUTE_INTERVAL = 25;
var INPUT_START = 1;
var INPUT_MOVE = 2;
var INPUT_END = 4;
var INPUT_CANCEL = 8;
var DIRECTION_NONE = 1;
var DIRECTION_LEFT = 2;
var DIRECTION_RIGHT = 4;
var DIRECTION_UP = 8;
var DIRECTION_DOWN = 16;
var DIRECTION_HORIZONTAL = DIRECTION_LEFT | DIRECTION_RIGHT;
var DIRECTION_VERTICAL = DIRECTION_UP | DIRECTION_DOWN;
var DIRECTION_ALL = DIRECTION_HORIZONTAL | DIRECTION_VERTICAL;
var PROPS_XY = ['x', 'y'];
var PROPS_CLIENT_XY = ['clientX', 'clientY'];
var STATE_POSSIBLE = 1;
var STATE_BEGAN = 2;
var STATE_CHANGED = 4;
var STATE_ENDED = 8;
var STATE_RECOGNIZED = STATE_ENDED;
var STATE_CANCELLED = 16;
var STATE_FAILED = 32;
/**
* @private
* extend object.
* means that properties in dest will be overwritten by the ones in src.
* @param {Object} target
* @param {...Object} objects_to_assign
* @returns {Object} target
*/
var assign = void 0;
if (typeof Object.assign !== 'function') {
assign = function assign(target) {
if (target === undefined || target === null) {
throw new TypeError('Cannot convert undefined or null to object');
}
var output = Object(target);
for (var index = 1; index < arguments.length; index++) {
var source = arguments[index];
if (source !== undefined && source !== null) {
for (var nextKey in source) {
if (source.hasOwnProperty(nextKey)) {
output[nextKey] = source[nextKey];
}
}
}
}
return output;
};
} else {
assign = Object.assign;
}
var assign$1 = assign;
/**
* @private
* get a unique id
* @returns {number} uniqueId
*/
var _uniqueId = 1;
function uniqueId() {
return _uniqueId++;
}
/**
* @private
* walk objects and arrays
* @param {Object} obj
* @param {Function} iterator
* @param {Object} context
*/
function each(obj, iterator, context) {
var i = void 0;
if (!obj) {
return;
}
if (obj.forEach) {
obj.forEach(iterator, context);
} else if (obj.length !== undefined) {
i = 0;
while (i < obj.length) {
iterator.call(context, obj[i], i, obj);
i++;
}
} else {
for (i in obj) {
obj.hasOwnProperty(i) && iterator.call(context, obj[i], i, obj);
}
}
}
/**
* @private
* if the argument is an array, we want to execute the fn on each entry
* if it aint an array we don't want to do a thing.
* this is used by all the methods that accept a single and array argument.
* @param {*|Array} arg
* @param {String} fn
* @param {Object} [context]
* @returns {Boolean}
*/
function invokeArrayArg(arg, fn, context) {
if (Array.isArray(arg)) {
each(arg, context[fn], context);
return true;
}
return false;
}
/**
* @private
* find if a array contains the object using indexOf or a simple polyFill
* @param {Array} src
* @param {String} find
* @param {String} [findByKey]
* @return {Boolean|Number} false when not found, or the index
*/
function inArray(src, find, findByKey) {
if (src.indexOf && !findByKey) {
return src.indexOf(find);
} else {
var i = 0;
while (i < src.length) {
if (findByKey && src[i][findByKey] == find || !findByKey && src[i] === find) {
// do not use === here, test fails
return i;
}
i++;
}
return -1;
}
}
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
return typeof obj;
} : function (obj) {
return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
};
var classCallCheck = function (instance, Constructor) {
if (!(instance instanceof Constructor)) {
throw new TypeError("Cannot call a class as a function");
}
};
var createClass = function () {
function defineProperties(target, props) {
for (var i = 0; i < props.length; i++) {
var descriptor = props[i];
descriptor.enumerable = descriptor.enumerable || false;
descriptor.configurable = true;
if ("value" in descriptor) descriptor.writable = true;
Object.defineProperty(target, descriptor.key, descriptor);
}
}
return function (Constructor, protoProps, staticProps) {
if (protoProps) defineProperties(Constructor.prototype, protoProps);
if (staticProps) defineProperties(Constructor, staticProps);
return Constructor;
};
}();
var get = function get(object, property, receiver) {
if (object === null) object = Function.prototype;
var desc = Object.getOwnPropertyDescriptor(object, property);
if (desc === undefined) {
var parent = Object.getPrototypeOf(object);
if (parent === null) {
return undefined;
} else {
return get(parent, property, receiver);
}
} else if ("value" in desc) {
return desc.value;
} else {
var getter = desc.get;
if (getter === undefined) {
return undefined;
}
return getter.call(receiver);
}
};
var inherits = function (subClass, superClass) {
if (typeof superClass !== "function" && superClass !== null) {
throw new TypeError("Super expression must either be null or a function, not " + typeof superClass);
}
subClass.prototype = Object.create(superClass && superClass.prototype, {
constructor: {
value: subClass,
enumerable: false,
writable: true,
configurable: true
}
});
if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
};
var possibleConstructorReturn = function (self, call) {
if (!self) {
throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
}
return call && (typeof call === "object" || typeof call === "function") ? call : self;
};
var slicedToArray = function () {
function sliceIterator(arr, i) {
var _arr = [];
var _n = true;
var _d = false;
var _e = undefined;
try {
for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
_arr.push(_s.value);
if (i && _arr.length === i) break;
}
} catch (err) {
_d = true;
_e = err;
} finally {
try {
if (!_n && _i["return"]) _i["return"]();
} finally {
if (_d) throw _e;
}
}
return _arr;
}
return function (arr, i) {
if (Array.isArray(arr)) {
return arr;
} else if (Symbol.iterator in Object(arr)) {
return sliceIterator(arr, i);
} else {
throw new TypeError("Invalid attempt to destructure non-iterable instance");
}
};
}();
/**
* @private
* let a boolean value also be a function that must return a boolean
* this first item in args will be used as the context
* @param {Boolean|Function} val
* @param {Array} [args]
* @returns {Boolean}
*/
function boolOrFn(val, args) {
if ((typeof val === 'undefined' ? 'undefined' : _typeof(val)) === TYPE_FUNCTION) {
return val.apply(args ? args[0] || undefined : undefined, args);
}
return val;
}
/**
* @private
* get a recognizer by name if it is bound to a manager
* @param {Recognizer|String} otherRecognizer
* @param {Recognizer} recognizer
* @returns {Recognizer}
*/
function getRecognizerByNameIfManager(otherRecognizer, recognizer) {
var manager = recognizer.manager;
if (manager) {
return manager.get(otherRecognizer);
}
return otherRecognizer;
}
/**
* @private
* get a usable string, used as event postfix
* @param {constant} state
* @returns {String} state
*/
function stateStr(state) {
if (state & STATE_CANCELLED) {
return 'cancel';
} else if (state & STATE_ENDED) {
return 'end';
} else if (state & STATE_CHANGED) {
return 'move';
} else if (state & STATE_BEGAN) {
return 'start';
}
return '';
}
/**
* @private
* Recognizer flow explained; *
* All recognizers have the initial state of POSSIBLE when a input session starts.
* The definition of a input session is from the first input until the last input, with all it's movement in it. *
* Example session for mouse-input: mousedown -> mousemove -> mouseup
*
* On each recognizing cycle (see Manager.recognize) the .recognize() method is executed
* which determines with state it should be.
*
* If the recognizer has the state FAILED, CANCELLED or RECOGNIZED (equals ENDED), it is reset to
* POSSIBLE to give it another change on the next cycle.
*
* Possible
* |
* +-----+---------------+
* | |
* +-----+-----+ |
* | | |
* Failed Cancelled |
* +-------+------+
* | |
* Recognized Began
* |
* Changed
* |
* Ended/Recognized
*/
/**
* @private
* Recognizer
* Every recognizer needs to extend from this class.
* @constructor
* @param {Object} options
*/
var Recognizer = function () {
function Recognizer(options) {
classCallCheck(this, Recognizer);
this.options = assign$1({}, this.defaults, options || {});
this.id = uniqueId();
this.manager = null;
// default is enable true
this.options.enable = ifUndefined(this.options.enable, true);
this.state = STATE_POSSIBLE;
this.simultaneous = {};
this.requireFail = [];
}
/**
* @private
* set options
* @param {Object} options
* @return {Recognizer}
*/
createClass(Recognizer, [{
key: 'set',
value: function set$$1(options) {
assign$1(this.options, options);
// also update the touchAction, in case something changed about the directions/enabled state
this.manager && this.manager.touchAction.update();
return this;
}
/**
* @private
* recognize simultaneous with an other recognizer.
* @param {Recognizer} otherRecognizer
* @returns {Recognizer} this
*/
}, {
key: 'recognizeWith',
value: function recognizeWith(otherRecognizer) {
if (invokeArrayArg(otherRecognizer, 'recognizeWith', this)) {
return this;
}
var simultaneous = this.simultaneous;
otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);
if (!simultaneous[otherRecognizer.id]) {
simultaneous[otherRecognizer.id] = otherRecognizer;
otherRecognizer.recognizeWith(this);
}
return this;
}
/**
* @private
* drop the simultaneous link. it doesnt remove the link on the other recognizer.
* @param {Recognizer} otherRecognizer
* @returns {Recognizer} this
*/
}, {
key: 'dropRecognizeWith',
value: function dropRecognizeWith(otherRecognizer) {
if (invokeArrayArg(otherRecognizer, 'dropRecognizeWith', this)) {
return this;
}
otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);
delete this.simultaneous[otherRecognizer.id];
return this;
}
/**
* @private
* recognizer can only run when an other is failing
* @param {Recognizer} otherRecognizer
* @returns {Recognizer} this
*/
}, {
key: 'requireFailure',
value: function requireFailure(otherRecognizer) {
if (invokeArrayArg(otherRecognizer, 'requireFailure', this)) {
return this;
}
var requireFail = this.requireFail;
otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);
if (inArray(requireFail, otherRecognizer) === -1) {
requireFail.push(otherRecognizer);
otherRecognizer.requireFailure(this);
}
return this;
}
/**
* @private
* drop the requireFailure link. it does not remove the link on the other recognizer.
* @param {Recognizer} otherRecognizer
* @returns {Recognizer} this
*/
}, {
key: 'dropRequireFailure',
value: function dropRequireFailure(otherRecognizer) {
if (invokeArrayArg(otherRecognizer, 'dropRequireFailure', this)) {
return this;
}
otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);
var index = inArray(this.requireFail, otherRecognizer);
if (index > -1) {
this.requireFail.splice(index, 1);
}
return this;
}
/**
* @private
* has require failures boolean
* @returns {boolean}
*/
}, {
key: 'hasRequireFailures',
value: function hasRequireFailures() {
return this.requireFail.length > 0;
}
/**
* @private
* if the recognizer can recognize simultaneous with an other recognizer
* @param {Recognizer} otherRecognizer
* @returns {Boolean}
*/
}, {
key: 'canRecognizeWith',
value: function canRecognizeWith(otherRecognizer) {
return !!this.simultaneous[otherRecognizer.id];
}
/**
* @private
* You should use `tryEmit` instead of `emit` directly to check
* that all the needed recognizers has failed before emitting.
* @param {Object} input
*/
}, {
key: 'emit',
value: function emit(input) {
var self = this;
var state = this.state;
function emit(event) {
self.manager.emit(event, input);
}
// 'panstart' and 'panmove'
if (state < STATE_ENDED) {
emit(self.options.event + stateStr(state));
}
emit(self.options.event); // simple 'eventName' events
if (input.additionalEvent) {
// additional event(panleft, panright, pinchin, pinchout...)
emit(input.additionalEvent);
}
// panend and pancancel
if (state >= STATE_ENDED) {
emit(self.options.event + stateStr(state));
}
}
/**
* @private
* Check that all the require failure recognizers has failed,
* if true, it emits a gesture event,
* otherwise, setup the state to FAILED.
* @param {Object} input
*/
}, {
key: 'tryEmit',
value: function tryEmit(input) {
if (this.canEmit()) {
return this.emit(input);
}
// it's failing anyway
this.state = STATE_FAILED;
}
/**
* @private
* can we emit?
* @returns {boolean}
*/
}, {
key: 'canEmit',
value: function canEmit() {
var i = 0;
while (i < this.requireFail.length) {
if (!(this.requireFail[i].state & (STATE_FAILED | STATE_POSSIBLE))) {
return false;
}
i++;
}
return true;
}
/**
* @private
* update the recognizer
* @param {Object} inputData
*/
}, {
key: 'recognize',
value: function recognize(inputData) {
// make a new copy of the inputData
// so we can change the inputData without messing up the other recognizers
var inputDataClone = assign$1({}, inputData);
// is is enabled and allow recognizing?
if (!boolOrFn(this.options.enable, [this, inputDataClone])) {
this.reset();
this.state = STATE_FAILED;
return;
}
// reset when we've reached the end
if (this.state & (STATE_RECOGNIZED | STATE_CANCELLED | STATE_FAILED)) {
this.state = STATE_POSSIBLE;
}
this.state = this.process(inputDataClone);
// the recognizer has recognized a gesture
// so trigger an event
if (this.state & (STATE_BEGAN | STATE_CHANGED | STATE_ENDED | STATE_CANCELLED)) {
this.tryEmit(inputDataClone);
}
}
/**
* @private
* return the state of the recognizer
* the actual recognizing happens in this method
* @virtual
* @param {Object} inputData
* @returns {constant} STATE
*/
/* jshint ignore:start */
}, {
key: 'process',
value: function process(inputData) {}
/* jshint ignore:end */
/**
* @private
* return the preferred touch-action
* @virtual
* @returns {Array}
*/
}, {
key: 'getTouchAction',
value: function getTouchAction() {}
/**
* @private
* called when the gesture isn't allowed to recognize
* like when another is being recognized or it is disabled
* @virtual
*/
}, {
key: 'reset',
value: function reset() {}
}]);
return Recognizer;
}();
Recognizer.prototype.defaults = {};
/**
* @private
* This recognizer is just used as a base for the simple attribute recognizers.
* @constructor
* @extends Recognizer
*/
var AttrRecognizer = function (_Recognizer) {
inherits(AttrRecognizer, _Recognizer);
function AttrRecognizer() {
classCallCheck(this, AttrRecognizer);
return possibleConstructorReturn(this, (AttrRecognizer.__proto__ || Object.getPrototypeOf(AttrRecognizer)).apply(this, arguments));
}
/**
* @private
* Used to check if it the recognizer receives valid input, like input.distance > 10.
* @memberof AttrRecognizer
* @param {Object} input
* @returns {Boolean} recognized
*/
createClass(AttrRecognizer, [{
key: 'attrTest',
value: function attrTest(input) {
var optionPointers = this.options.pointers;
return optionPointers === 0 || input.pointers.length === optionPointers;
}
/**
* @private
* Process the input and return the state for the recognizer
* @memberof AttrRecognizer
* @param {Object} input
* @returns {*} State
*/
}, {
key: 'process',
value: function process(input) {
var state = this.state;
var eventType = input.eventType;
var isRecognized = state & (STATE_BEGAN | STATE_CHANGED);
var isValid = this.attrTest(input);
// on cancel input and we've recognized before, return STATE_CANCELLED
if (isRecognized && (eventType & INPUT_CANCEL || !isValid)) {
return state | STATE_CANCELLED;
} else if (isRecognized || isValid) {
if (eventType & INPUT_END) {
return state | STATE_ENDED;
} else if (!(state & STATE_BEGAN)) {
return STATE_BEGAN;
}
return state | STATE_CHANGED;
}
return STATE_FAILED;
}
}]);
return AttrRecognizer;
}(Recognizer);
AttrRecognizer.prototype.defaults = {
/**
* @private
* @type {Number}
* @default 1
*/
pointers: 1
};
/**
* @private
* Rotate
* Recognized when two or more pointer are moving in a circular motion.
* @constructor
* @extends AttrRecognizer
*/
var RotateRecognizer = function (_AttrRecognizer) {
inherits(RotateRecognizer, _AttrRecognizer);
function RotateRecognizer() {
classCallCheck(this, RotateRecognizer);
return possibleConstructorReturn(this, (RotateRecognizer.__proto__ || Object.getPrototypeOf(RotateRecognizer)).apply(this, arguments));
}
createClass(RotateRecognizer, [{
key: 'getTouchAction',
value: function getTouchAction() {
return [TOUCH_ACTION_NONE];
}
}, {
key: 'attrTest',
value: function attrTest(input) {
return get(RotateRecognizer.prototype.__proto__ || Object.getPrototypeOf(RotateRecognizer.prototype), 'attrTest', this).call(this, input) && (Math.abs(input.rotation) > this.options.threshold || this.state & STATE_BEGAN);
}
}]);
return RotateRecognizer;
}(AttrRecognizer);
RotateRecognizer.prototype.defaults = {
event: 'rotate',
threshold: 0,
pointers: 2
};
/**
* @private
* Pinch
* Recognized when two or more pointers are moving toward (zoom-in) or away from each other (zoom-out).
* @constructor
* @extends AttrRecognizer
*/
var PinchRecognizer = function (_AttrRecognizer) {
inherits(PinchRecognizer, _AttrRecognizer);
function PinchRecognizer() {
classCallCheck(this, PinchRecognizer);
return possibleConstructorReturn(this, (PinchRecognizer.__proto__ || Object.getPrototypeOf(PinchRecognizer)).apply(this, arguments));
}
createClass(PinchRecognizer, [{
key: 'getTouchAction',
value: function getTouchAction() {
return [TOUCH_ACTION_NONE];
}
}, {
key: 'attrTest',
value: function attrTest(input) {
return get(PinchRecognizer.prototype.__proto__ || Object.getPrototypeOf(PinchRecognizer.prototype), 'attrTest', this).call(this, input) && (Math.abs(input.scale - 1) > this.options.threshold || this.state & STATE_BEGAN);
}
}, {
key: 'emit',
value: function emit(input) {
if (input.scale !== 1) {
var inOut = input.scale < 1 ? 'in' : 'out';
input.additionalEvent = this.options.event + inOut;
}
get(PinchRecognizer.prototype.__proto__ || Object.getPrototypeOf(PinchRecognizer.prototype), 'emit', this).call(this, input);
}
}]);
return PinchRecognizer;
}(AttrRecognizer);
PinchRecognizer.prototype.defaults = {
event: 'pinch',
threshold: 0,
pointers: 2
};
/**
* @private
* direction cons to string
* @param {constant} direction
* @returns {String}
*/
function directionStr(direction) {
if (direction === DIRECTION_DOWN) {
return 'down';
} else if (direction === DIRECTION_UP) {
return 'up';
} else if (direction === DIRECTION_LEFT) {
return 'left';
} else if (direction === DIRECTION_RIGHT) {
return 'right';
}
return '';
}
/**
* @private
* Pan
* Recognized when the pointer is down and moved in the allowed direction.
* @constructor
* @extends AttrRecognizer
*/
var PanRecognizer = function (_AttrRecognizer) {
inherits(PanRecognizer, _AttrRecognizer);
function PanRecognizer() {
classCallCheck(this, PanRecognizer);
var _this = possibleConstructorReturn(this, (PanRecognizer.__proto__ || Object.getPrototypeOf(PanRecognizer)).apply(this, arguments));
_this.pX = null;
_this.pY = null;
return _this;
}
createClass(PanRecognizer, [{
key: 'getTouchAction',
value: function getTouchAction() {
var direction = this.options.direction;
var actions = [];
if (direction & DIRECTION_HORIZONTAL) {
actions.push(TOUCH_ACTION_PAN_Y);
}
if (direction & DIRECTION_VERTICAL) {
actions.push(TOUCH_ACTION_PAN_X);
}
return actions;
}
}, {
key: 'directionTest',
value: function directionTest(input) {
var options = this.options;
var hasMoved = true;
var distance = input.distance;
var direction = input.direction;
var x = input.deltaX;
var y = input.deltaY;
// lock to axis?
if (!(direction & options.direction)) {
if (options.direction & DIRECTION_HORIZONTAL) {
direction = x === 0 ? DIRECTION_NONE : x < 0 ? DIRECTION_LEFT : DIRECTION_RIGHT;
hasMoved = x !== this.pX;
distance = Math.abs(input.deltaX);
} else {
direction = y === 0 ? DIRECTION_NONE : y < 0 ? DIRECTION_UP : DIRECTION_DOWN;
hasMoved = y !== this.pY;
distance = Math.abs(input.deltaY);
}
}
input.direction = direction;
return hasMoved && distance > options.threshold && direction & options.direction;
}
}, {
key: 'attrTest',
value: function attrTest(input) {
return AttrRecognizer.prototype.attrTest.call(this, input) && ( // replace with a super call
this.state & STATE_BEGAN || !(this.state & STATE_BEGAN) && this.directionTest(input));
}
}, {
key: 'emit',
value: function emit(input) {
this.pX = input.deltaX;
this.pY = input.deltaY;
var direction = directionStr(input.direction);
if (direction) {
input.additionalEvent = this.options.event + direction;
}
get(PanRecognizer.prototype.__proto__ || Object.getPrototypeOf(PanRecognizer.prototype), 'emit', this).call(this, input);
}
}]);
return PanRecognizer;
}(AttrRecognizer);
PanRecognizer.prototype.defaults = {
event: 'pan',
threshold: 10,
pointers: 1,
direction: DIRECTION_ALL
};
/**
* @private
* Swipe
* Recognized when the pointer is moving fast (velocity), with enough distance in the allowed direction.
* @constructor
* @extends AttrRecognizer
*/
var SwipeRecognizer = function (_AttrRecognizer) {
inherits(SwipeRecognizer, _AttrRecognizer);
function SwipeRecognizer() {
classCallCheck(this, SwipeRecognizer);
return possibleConstructorReturn(this, (SwipeRecognizer.__proto__ || Object.getPrototypeOf(SwipeRecognizer)).apply(this, arguments));
}
createClass(SwipeRecognizer, [{
key: 'getTouchAction',
value: function getTouchAction() {
return PanRecognizer.prototype.getTouchAction.call(this);
}
}, {
key: 'attrTest',
value: function attrTest(input) {
var direction = this.options.direction;
var velocity = void 0;
if (direction & (DIRECTION_HORIZONTAL | DIRECTION_VERTICAL)) {
velocity = input.overallVelocity;
} else if (direction & DIRECTION_HORIZONTAL) {
velocity = input.overallVelocityX;
} else if (direction & DIRECTION_VERTICAL) {
velocity = input.overallVelocityY;
}
return get(SwipeRecognizer.prototype.__proto__ || Object.getPrototypeOf(SwipeRecognizer.prototype), 'attrTest', this).call(this, input) && direction & input.offsetDirection && input.distance > this.options.threshold && input.maxPointers === this.options.pointers && abs(velocity) > this.options.velocity && input.eventType & INPUT_END;
}
}, {
key: 'emit',
value: function emit(input) {
var direction = directionStr(input.offsetDirection);
if (direction) {
this.manager.emit(this.options.event + direction, input);
}
this.manager.emit(this.options.event, input);
}
}]);
return SwipeRecognizer;
}(AttrRecognizer);
SwipeRecognizer.prototype.defaults = {
event: 'swipe',
threshold: 10,
velocity: 0.3,
direction: DIRECTION_HORIZONTAL | DIRECTION_VERTICAL,
pointers: 1
};
/**
* @private
* simple function bind
* @param {Function} fn
* @param {Object} context
* @returns {Function}
*/
function bindFn(fn, context) {
return function boundFn() {
return fn.apply(context, arguments);
};
}
/**
* @private
* set a timeout with a given scope
* @param {Function} fn
* @param {Number} timeout
* @param {Object} context
* @returns {number}
*/
function setTimeoutContext(fn, timeout, context) {
return setTimeout(bindFn(fn, context), timeout);
}
/**
* @private
* calculate the absolute distance between two points
* @param {Object} p1 {x, y}
* @param {Object} p2 {x, y}
* @param {Array} [props] containing x and y keys
* @return {Number} distance
*/
function getDistance(p1, p2, props) {
if (!props) {
props = PROPS_XY;
}
var x = p2[props[0]] - p1[props[0]];
var y = p2[props[1]] - p1[props[1]];
return Math.sqrt(x * x + y * y);
}
/**
* @private
* A tap is recognized when the pointer is doing a small tap/click. Multiple taps are recognized if they occur
* between the given interval and position. The delay option can be used to recognize multi-taps without firing
* a single tap.
*
* The eventData from the emitted event contains the property `tapCount`, which contains the amount of
* multi-taps being recognized.
* @constructor
* @extends Recognizer
*/
var TapRecognizer = function (_Recognizer) {
inherits(TapRecognizer, _Recognizer);
function TapRecognizer() {
classCallCheck(this, TapRecognizer);
// previous time and center,
// used for tap counting
var _this = possibleConstructorReturn(this, (TapRecognizer.__proto__ || Object.getPrototypeOf(TapRecognizer)).apply(this, arguments));
_this.pTime = false;
_this.pCenter = false;
_this._timer = null;
_this._input = null;
_this.count = 0;
return _this;
}
createClass(TapRecognizer, [{
key: 'getTouchAction',
value: function getTouchAction() {
return [TOUCH_ACTION_MANIPULATION];
}
}, {
key: 'process',
value: function process(input) {
var _this2 = this;
var options = this.options;
var validPointers = input.pointers.length === options.pointers;
var validMovement = input.distance < options.threshold;
var validTouchTime = input.deltaTime < options.time;
this.reset();
if (input.eventType & INPUT_START && this.count === 0) {
return this.failTimeout();
}
// we only allow little movement
// and we've reached an end event, so a tap is possible
if (validMovement && validTouchTime && validPointers) {
if (input.eventType !== INPUT_END) {
return this.failTimeout();
}
var validInterval = this.pTime ? input.timeStamp - this.pTime < options.interval : true;
var validMultiTap = !this.pCenter || getDistance(this.pCenter, input.center) < options.posThreshold;
this.pTime = input.timeStamp;
this.pCenter = input.center;
if (!validMultiTap || !validInterval) {
this.count = 1;
} else {
this.count += 1;
}
this._input = input;
// if tap count matches we have recognized it,
// else it has began recognizing...
var tapCount = this.count % options.taps;
if (tapCount === 0) {
// no failing requirements, immediately trigger the tap event
// or wait as long as the multitap interval to trigger
if (!this.hasRequireFailures()) {
return STATE_RECOGNIZED;
} else {
this._timer = setTimeoutContext(function () {
_this2.state = STATE_RECOGNIZED;
_this2.tryEmit();
}, options.interval, this);
return STATE_BEGAN;
}
}
}
return STATE_FAILED;
}
}, {
key: 'failTimeout',
value: function failTimeout() {
var _this3 = this;
this._timer = setTimeoutContext(function () {
_this3.state = STATE_FAILED;
}, this.options.interval, this);
return STATE_FAILED;
}
}, {
key: 'reset',
value: function reset() {
clearTimeout(this._timer);
}
}, {
key: 'emit',
value: function emit() {
if (this.state === STATE_RECOGNIZED) {
this._input.tapCount = this.count;
this.manager.emit(this.options.event, this._input);
}
}
}]);
return TapRecognizer;
}(Recognizer);
TapRecognizer.prototype.defaults = {
event: 'tap',
pointers: 1,
taps: 1,
interval: 300, // max time between the multi-tap taps
time: 250, // max time of the pointer to be down (like finger on the screen)
threshold: 9, // a minimal movement is ok, but keep it low
posThreshold: 10 // a multi-tap can be a bit off the initial position
};
/**
* @private
* Press
* Recognized when the pointer is down for x ms without any movement.
* @constructor
* @extends Recognizer
*/
var PressRecognizer = function (_Recognizer) {
inherits(PressRecognizer, _Recognizer);
function PressRecognizer() {
classCallCheck(this, PressRecognizer);
var _this = possibleConstructorReturn(this, (PressRecognizer.__proto__ || Object.getPrototypeOf(PressRecognizer)).apply(this, arguments));
_this._timer = null;
_this._input = null;
return _this;
}
createClass(PressRecognizer, [{
key: 'getTouchAction',
value: function getTouchAction() {
return [TOUCH_ACTION_AUTO];
}
}, {
key: 'process',
value: function process(input) {
var _this2 = this;
var options = this.options;
var validPointers = input.pointers.length === options.pointers;
var validMovement = input.distance < options.threshold;
var validTime = input.deltaTime > options.time;
this._input = input;
// we only allow little movement
// and we've reached an end event, so a tap is possible
if (!validMovement || !validPointers || input.eventType & (INPUT_END | INPUT_CANCEL) && !validTime) {
this.reset();
} else if (input.eventType & INPUT_START) {
this.reset();
this._timer = setTimeoutContext(function () {
_this2.state = STATE_RECOGNIZED;
_this2.tryEmit();
}, options.time, this);
} else if (input.eventType & INPUT_END) {
return STATE_RECOGNIZED;
}
return STATE_FAILED;
}
}, {
key: 'reset',
value: function reset() {
clearTimeout(this._timer);
}
}, {
key: 'emit',
value: function emit(input) {
if (this.state !== STATE_RECOGNIZED) {
return;
}
if (input && input.eventType & INPUT_END) {
this.manager.emit(this.options.event + 'up', input);
} else {
this._input.timeStamp = now();
this.manager.emit(this.options.event, this._input);
}
}
}]);
return PressRecognizer;
}(Recognizer);
PressRecognizer.prototype.defaults = {
event: 'press',
pointers: 1,
time: 251, // minimal time of the pointer to be pressed
threshold: 9 // a minimal movement is ok, but keep it low
};
/**
* @private
* small indexOf wrapper
* @param {String} str
* @param {String} find
* @returns {Boolean} found
*/
function inStr(str, find) {
return str.indexOf(find) > -1;
}
/**
* @private
* when the touchActions are collected they are not a valid value, so we need to clean things up. *
* @param {String} actions
* @returns {*}
*/
function cleanTouchActions(actions) {
// none
if (inStr(actions, TOUCH_ACTION_NONE)) {
return TOUCH_ACTION_NONE;
}
var hasPanX = inStr(actions, TOUCH_ACTION_PAN_X);
var hasPanY = inStr(actions, TOUCH_ACTION_PAN_Y);
// if both pan-x and pan-y are set (different recognizers
// for different directions, e.g. horizontal pan but vertical swipe?)
// we need none (as otherwise with pan-x pan-y combined none of these
// recognizers will work, since the browser would handle all panning
if (hasPanX && hasPanY) {
return TOUCH_ACTION_NONE;
}
// pan-x OR pan-y
if (hasPanX || hasPanY) {
return hasPanX ? TOUCH_ACTION_PAN_X : TOUCH_ACTION_PAN_Y;
}
// manipulation
if (inStr(actions, TOUCH_ACTION_MANIPULATION)) {
return TOUCH_ACTION_MANIPULATION;
}
return TOUCH_ACTION_AUTO;
}
/**
* @private
* Touch Action
* sets the touchAction property or uses the js alternative
* @param {Manager} manager
* @param {String} value
* @constructor
*/
var TouchAction = function () {
function TouchAction(manager, value) {
classCallCheck(this, TouchAction);
this.manager = manager;
this.set(value);
}
/**
* @private
* set the touchAction value on the element or enable the polyfill
* @param {String} value
*/
createClass(TouchAction, [{
key: 'set',
value: function set$$1(value) {
// find out the touch-action by the event handlers
if (value === TOUCH_ACTION_COMPUTE) {
value = this.compute();
}
if (NATIVE_TOUCH_ACTION && this.manager.element.style && TOUCH_ACTION_MAP[value]) {
this.manager.element.style[PREFIXED_TOUCH_ACTION] = value;
}
this.actions = value.toLowerCase().trim();
}
/**
* @private
* just re-set the touchAction value
*/
}, {
key: 'update',
value: function update() {
this.set(this.manager.options.touchAction);
}
/**
* @private
* compute the value for the touchAction property based on the recognizer's settings
* @returns {String} value
*/
}, {
key: 'compute',
value: function compute() {
var actions = [];
each(this.manager.recognizers, function (recognizer) {
if (boolOrFn(recognizer.options.enable, [recognizer])) {
actions = actions.concat(recognizer.getTouchAction());
}
});
return cleanTouchActions(actions.join(' '));
}
/**
* @private
* this method is called on each input cycle and provides the preventing of the browser behavior
* @param {Object} input
*/
}, {
key: 'preventDefaults',
value: function preventDefaults(input) {
var srcEvent = input.srcEvent;
var direction = input.offsetDirection;
// if the touch action did prevented once this session
if (this.manager.session.prevented) {
srcEvent.preventDefault();
return;
}
var actions = this.actions;
var hasNone = inStr(actions, TOUCH_ACTION_NONE) && !TOUCH_ACTION_MAP[TOUCH_ACTION_NONE];
var hasPanY = inStr(actions, TOUCH_ACTION_PAN_Y) && !TOUCH_ACTION_MAP[TOUCH_ACTION_PAN_Y];
var hasPanX = inStr(actions, TOUCH_ACTION_PAN_X) && !TOUCH_ACTION_MAP[TOUCH_ACTION_PAN_X];
if (hasNone) {
// do not prevent defaults if this is a tap gesture
var isTapPointer = input.pointers.length === 1;
var isTapMovement = input.distance < 2;
var isTapTouchTime = input.deltaTime < 250;
if (isTapPointer && isTapMovement && isTapTouchTime) {
return;
}
}
if (hasPanX && hasPanY) {
// `pan-x pan-y` means browser handles all scrolling/panning, do not prevent
return;
}
if (hasNone || hasPanY && direction & DIRECTION_HORIZONTAL || hasPanX && direction & DIRECTION_VERTICAL) {
return this.preventSrc(srcEvent);
}
}
/**
* @private
* call preventDefault to prevent the browser's default behavior (scrolling in most cases)
* @param {Object} srcEvent
*/
}, {
key: 'preventSrc',
value: function preventSrc(srcEvent) {
this.manager.session.prevented = true;
srcEvent.preventDefault();
}
}]);
return TouchAction;
}();
/**
* @private
* find if a node is in the given parent
* @method hasParent
* @param {HTMLElement} node
* @param {HTMLElement} parent
* @return {Boolean} found
*/
function hasParent(node, parent) {
while (node) {
if (node === parent) {
return true;
}
node = node.parentNode;
}
return false;
}
/**
* @private
* get the center of all the pointers
* @param {Array} pointers
* @return {Object} center contains `x` and `y` properties
*/
function getCenter(pointers) {
var pointersLength = pointers.length;
// no need to loop when only one touch
if (pointersLength === 1) {
return {
x: round(pointers[0].clientX),
y: round(pointers[0].clientY)
};
}
var x = 0;
var y = 0;
var i = 0;
while (i < pointersLength) {
x += pointers[i].clientX;
y += pointers[i].clientY;
i++;
}
return {
x: round(x / pointersLength),
y: round(y / pointersLength)
};
}
/**
* @private
* create a simple clone from the input used for storage of firstInput and firstMultiple
* @param {Object} input
* @returns {Object} clonedInputData
*/
function simpleCloneInputData(input) {
// make a simple copy of the pointers because we will get a reference if we don't
// we only need clientXY for the calculations
var pointers = [];
var i = 0;
while (i < input.pointers.length) {
pointers[i] = {
clientX: round(input.pointers[i].clientX),
clientY: round(input.pointers[i].clientY)
};
i++;
}
return {
timeStamp: now(),
pointers: pointers,
center: getCenter(pointers),
deltaX: input.deltaX,
deltaY: input.deltaY
};
}
/**
* @private
* calculate the angle between two coordinates
* @param {Object} p1
* @param {Object} p2
* @param {Array} [props] containing x and y keys
* @return {Number} angle
*/
function getAngle(p1, p2, props) {
if (!props) {
props = PROPS_XY;
}
var x = p2[props[0]] - p1[props[0]];
var y = p2[props[1]] - p1[props[1]];
return Math.atan2(y, x) * 180 / Math.PI;
}
/**
* @private
* get the direction between two points
* @param {Number} x
* @param {Number} y
* @return {Number} direction
*/
function getDirection(x, y) {
if (x === y) {
return DIRECTION_NONE;
}
if (abs(x) >= abs(y)) {
return x < 0 ? DIRECTION_LEFT : DIRECTION_RIGHT;
}
return y < 0 ? DIRECTION_UP : DIRECTION_DOWN;
}
function computeDeltaXY(session, input) {
var center = input.center;
// let { offsetDelta:offset = {}, prevDelta = {}, prevInput = {} } = session;
// jscs throwing error on defalut destructured values and without defaults tests fail
var offset = session.offsetDelta || {};
var prevDelta = session.prevDelta || {};
var prevInput = session.prevInput || {};
if (input.eventType === INPUT_START || prevInput.eventType === INPUT_END) {
prevDelta = session.prevDelta = {
x: prevInput.deltaX || 0,
y: prevInput.deltaY || 0
};
offset = session.offsetDelta = {
x: center.x,
y: center.y
};
}
input.deltaX = prevDelta.x + (center.x - offset.x);
input.deltaY = prevDelta.y + (center.y - offset.y);
}
/**
* @private
* calculate the velocity between two points. unit is in px per ms.
* @param {Number} deltaTime
* @param {Number} x
* @param {Number} y
* @return {Object} velocity `x` and `y`
*/
function getVelocity(deltaTime, x, y) {
return {
x: x / deltaTime || 0,
y: y / deltaTime || 0
};
}
/**
* @private
* calculate the scale factor between two pointersets
* no scale is 1, and goes down to 0 when pinched together, and bigger when pinched out
* @param {Array} start array of pointers
* @param {Array} end array of pointers
* @return {Number} scale
*/
function getScale(start, end) {
return getDistance(end[0], end[1], PROPS_CLIENT_XY) / getDistance(start[0], start[1], PROPS_CLIENT_XY);
}
/**
* @private
* calculate the rotation degrees between two pointersets
* @param {Array} start array of pointers
* @param {Array} end array of pointers
* @return {Number} rotation
*/
function getRotation(start, end) {
return getAngle(end[1], end[0], PROPS_CLIENT_XY) + getAngle(start[1], start[0], PROPS_CLIENT_XY);
}
/**
* @private
* velocity is calculated every x ms
* @param {Object} session
* @param {Object} input
*/
function computeIntervalInputData(session, input) {
var last = session.lastInterval || input;
var deltaTime = input.timeStamp - last.timeStamp;
var velocity = void 0;
var velocityX = void 0;
var velocityY = void 0;
var direction = void 0;
if (input.eventType !== INPUT_CANCEL && (deltaTime > COMPUTE_INTERVAL || last.velocity === undefined)) {
var deltaX = input.deltaX - last.deltaX;
var deltaY = input.deltaY - last.deltaY;
var v = getVelocity(deltaTime, deltaX, deltaY);
velocityX = v.x;
velocityY = v.y;
velocity = abs(v.x) > abs(v.y) ? v.x : v.y;
direction = getDirection(deltaX, deltaY);
session.lastInterval = input;
} else {
// use latest velocity info if it doesn't overtake a minimum period
velocity = last.velocity;
velocityX = last.velocityX;
velocityY = last.velocityY;
direction = last.direction;
}
input.velocity = velocity;
input.velocityX = velocityX;
input.velocityY = velocityY;
input.direction = direction;
}
/**
* @private
* extend the data with some usable properties like scale, rotate, velocity etc
* @param {Object} manager
* @param {Object} input
*/
function computeInputData(manager, input) {
var session = manager.session;
var pointers = input.pointers;
var pointersLength = pointers.length;
// store the first input to calculate the distance and direction
if (!session.firstInput) {
session.firstInput = simpleCloneInputData(input);
}
// to compute scale and rotation we need to store the multiple touches
if (pointersLength > 1 && !session.firstMultiple) {
session.firstMultiple = simpleCloneInputData(input);
} else if (pointersLength === 1) {
session.firstMultiple = false;
}
var firstInput = session.firstInput,
firstMultiple = session.firstMultiple;
var offsetCenter = firstMultiple ? firstMultiple.center : firstInput