136 lines
4.3 KiB
JavaScript
136 lines
4.3 KiB
JavaScript
/**
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* Copyright 2004-present Facebook. All Rights Reserved.
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*
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* @providesModule JSTimers
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*/
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'use strict';
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// Note that the module JSTimers is split into two in order to solve a cycle
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// in dependencies. NativeModules > BatchedBridge > MessageQueue > JSTimersExecution
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var RKTiming = require('NativeModules').RKTiming;
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var JSTimersExecution = require('JSTimersExecution');
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/**
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* JS implementation of timer functions. Must be completely driven by an
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* external clock signal, all that's stored here is timerID, timer type, and
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* callback.
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*/
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var JSTimers = {
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Types: JSTimersExecution.Types,
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/**
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* Returns a free index if one is available, and the next consecutive index
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* otherwise.
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*/
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_getFreeIndex: function() {
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var freeIndex = JSTimersExecution.timerIDs.indexOf(null);
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if (freeIndex === -1) {
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freeIndex = JSTimersExecution.timerIDs.length;
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}
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return freeIndex;
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},
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/**
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* @param {function} func Callback to be invoked after `duration` ms.
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* @param {number} duration Number of milliseconds.
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*/
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setTimeout: function(func, duration, ...args) {
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var newID = JSTimersExecution.GUID++;
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var freeIndex = JSTimers._getFreeIndex();
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JSTimersExecution.timerIDs[freeIndex] = newID;
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JSTimersExecution.callbacks[freeIndex] = func;
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JSTimersExecution.callbacks[freeIndex] = function() {
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return func.apply(undefined, args);
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};
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JSTimersExecution.types[freeIndex] = JSTimersExecution.Type.setTimeout;
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RKTiming.createTimer(newID, duration, Date.now(), /** recurring */ false);
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return newID;
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},
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/**
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* @param {function} func Callback to be invoked every `duration` ms.
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* @param {number} duration Number of milliseconds.
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*/
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setInterval: function(func, duration, ...args) {
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var newID = JSTimersExecution.GUID++;
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var freeIndex = JSTimers._getFreeIndex();
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JSTimersExecution.timerIDs[freeIndex] = newID;
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JSTimersExecution.callbacks[freeIndex] = func;
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JSTimersExecution.callbacks[freeIndex] = function() {
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return func.apply(undefined, args);
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};
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JSTimersExecution.types[freeIndex] = JSTimersExecution.Type.setInterval;
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RKTiming.createTimer(newID, duration, Date.now(), /** recurring */ true);
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return newID;
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},
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/**
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* @param {function} func Callback to be invoked before the end of the
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* current JavaScript execution loop.
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*/
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setImmediate: function(func, ...args) {
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var newID = JSTimersExecution.GUID++;
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var freeIndex = JSTimers._getFreeIndex();
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JSTimersExecution.timerIDs[freeIndex] = newID;
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JSTimersExecution.callbacks[freeIndex] = func;
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JSTimersExecution.callbacks[freeIndex] = function() {
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return func.apply(undefined, args);
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};
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JSTimersExecution.types[freeIndex] = JSTimersExecution.Type.setImmediate;
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JSTimersExecution.immediates.push(newID);
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return newID;
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},
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/**
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* @param {function} func Callback to be invoked every frame.
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*/
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requestAnimationFrame: function(func) {
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var newID = JSTimersExecution.GUID++;
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var freeIndex = JSTimers._getFreeIndex();
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JSTimersExecution.timerIDs[freeIndex] = newID;
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JSTimersExecution.callbacks[freeIndex] = func;
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JSTimersExecution.types[freeIndex] = JSTimersExecution.Type.requestAnimationFrame;
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RKTiming.createTimer(newID, 0, Date.now(), /** recurring */ false);
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return newID;
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},
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clearTimeout: function(timerID) {
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JSTimers._clearTimerID(timerID);
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},
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clearInterval: function(timerID) {
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JSTimers._clearTimerID(timerID);
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},
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clearImmediate: function(timerID) {
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JSTimers._clearTimerID(timerID);
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JSTimersExecution.immediates.splice(
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JSTimersExecution.immediates.indexOf(timerID),
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1
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);
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},
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cancelAnimationFrame: function(timerID) {
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JSTimers._clearTimerID(timerID);
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},
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_clearTimerID: function(timerID) {
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// JSTimersExecution.timerIDs contains nulls after timers have been removed;
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// ignore nulls upfront so indexOf doesn't find them
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if (timerID == null) {
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return;
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}
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var index = JSTimersExecution.timerIDs.indexOf(timerID);
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// See corresponding comment in `callTimers` for reasoning behind this
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if (index !== -1) {
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JSTimersExecution._clearIndex(index);
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if (JSTimersExecution.types[index] !== JSTimersExecution.Type.setImmediate) {
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RKTiming.deleteTimer(timerID);
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}
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}
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},
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};
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module.exports = JSTimers;
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