Vibration.js
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/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @providesModule Vibration
* @flow
* @jsdoc
*/
'use strict';
var RCTVibration = require('NativeModules').Vibration;
var Platform = require('Platform');
/**
* Vibration API
*
* See https://facebook.github.io/react-native/docs/vibration.html
*/
var _vibrating: boolean = false;
var _id: number = 0; // _id is necessary to prevent race condition.
function vibrateByPattern(pattern: Array<number>, repeat: boolean = false) {
if (_vibrating) {
return;
}
_vibrating = true;
if (pattern[0] === 0) {
RCTVibration.vibrate();
pattern = pattern.slice(1);
}
if (pattern.length === 0) {
_vibrating = false;
return;
}
setTimeout(() => vibrateScheduler(++_id, pattern, repeat, 1), pattern[0]);
}
function vibrateScheduler(id, pattern: Array<number>, repeat: boolean, nextIndex: number) {
if (!_vibrating || id !== _id) {
return;
}
RCTVibration.vibrate();
if (nextIndex >= pattern.length) {
if (repeat) {
nextIndex = 0;
} else {
_vibrating = false;
return;
}
}
setTimeout(() => vibrateScheduler(id, pattern, repeat, nextIndex + 1), pattern[nextIndex]);
}
var Vibration = {
/**
* Trigger a vibration with specified `pattern`.
*
* See https://facebook.github.io/react-native/docs/vibration.html#vibrate
*/
vibrate: function(pattern: number | Array<number> = 400, repeat: boolean = false) {
if (Platform.OS === 'android') {
if (typeof pattern === 'number') {
RCTVibration.vibrate(pattern);
} else if (Array.isArray(pattern)) {
RCTVibration.vibrateByPattern(pattern, repeat ? 0 : -1);
} else {
throw new Error('Vibration pattern should be a number or array');
}
} else {
if (_vibrating) {
return;
}
if (typeof pattern === 'number') {
RCTVibration.vibrate();
} else if (Array.isArray(pattern)) {
vibrateByPattern(pattern, repeat);
} else {
throw new Error('Vibration pattern should be a number or array');
}
}
},
/**
* Stop vibration
*
* See https://facebook.github.io/react-native/docs/vibration.html#cancel
*/
cancel: function() {
if (Platform.OS === 'ios') {
_vibrating = false;
} else {
RCTVibration.cancel();
}
}
};
module.exports = Vibration;