112 lines
2.9 KiB
JavaScript
112 lines
2.9 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule Vibration
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* @flow
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*/
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'use strict';
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var RCTVibration = require('NativeModules').Vibration;
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var Platform = require('Platform');
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/**
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* The Vibration API is exposed at `Vibration.vibrate()`.
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* The vibration is asynchronous so this method will return immediately.
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*
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* There will be no effect on devices that do not support Vibration, eg. the simulator.
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*
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* **Note for android**
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* add `<uses-permission android:name="android.permission.VIBRATE"/>` to `AndroidManifest.xml`
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*
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* **Android Usage:**
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*
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* [0, 500, 200, 500]
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* V(0.5s) --wait(0.2s)--> V(0.5s)
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*
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* [300, 500, 200, 500]
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* --wait(0.3s)--> V(0.5s) --wait(0.2s)--> V(0.5s)
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*
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* **iOS Usage:**
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* if first argument is 0, it will not be included in pattern array.
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*
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* [0, 1000, 2000, 3000]
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* V(fixed) --wait(1s)--> V(fixed) --wait(2s)--> V(fixed) --wait(3s)--> V(fixed)
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*/
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var _vibrating: boolean = false;
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var _id: number = 0; // _id is necessary to prevent race condition.
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function vibrateByPattern(pattern: Array<number>, repeat: boolean = false) {
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if (_vibrating) {
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return;
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}
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_vibrating = true;
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if (pattern[0] === 0) {
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RCTVibration.vibrate();
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pattern = pattern.slice(1);
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}
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if (pattern.length === 0) {
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_vibrating = false;
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return;
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}
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setTimeout(() => vibrateScheduler(++_id, pattern, repeat, 1), pattern[0]);
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}
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function vibrateScheduler(id, pattern: Array<number>, repeat: boolean, nextIndex: number) {
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if (!_vibrating || id !== _id) {
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return;
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}
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RCTVibration.vibrate();
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if (nextIndex >= pattern.length) {
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if (repeat) {
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nextIndex = 0;
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} else {
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_vibrating = false;
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return;
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}
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}
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setTimeout(() => vibrateScheduler(id, pattern, repeat, nextIndex+1), pattern[nextIndex]);
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}
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var Vibration = {
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vibrate: function(pattern: number | Array<number> = 400, repeat: boolean = false) {
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if (Platform.OS === 'android') {
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if (typeof pattern === 'number') {
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RCTVibration.vibrate(pattern);
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} else if (Array.isArray(pattern)) {
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RCTVibration.vibrateByPattern(pattern, repeat ? 0 : -1);
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} else {
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throw new Error('Vibration pattern should be a number or array');
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}
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} else {
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if (_vibrating) {
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return;
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}
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if (typeof pattern === 'number') {
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RCTVibration.vibrate();
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} else if (Array.isArray(pattern)) {
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vibrateByPattern(pattern, repeat);
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} else {
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throw new Error('Vibration pattern should be a number or array');
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}
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}
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},
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/**
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* Stop vibration
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*/
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cancel: function() {
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if (Platform.OS === 'ios') {
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_vibrating = false;
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} else {
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RCTVibration.cancel();
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}
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}
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};
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module.exports = Vibration;
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