html5/render/browser/extend/components/slider/timer.js

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
/* eslint-disable */


'use strict'

var _fallback = false

var raf = window.requestAnimationFrame
  || window.webkitRequestAnimationFrame
if (!raf) {
  _fallback = true
  raf = function (callback) {
    return setTimeout(callback, 16)
  }
}
var caf = window.cancelAnimationFrame
  || window.webkitCancelAnimationFrame
if (!caf && _fallback) {
  caf = function (id) {
    return clearTimeout(id)
  }
} else if (!caf) {
  caf = function() {}
}

var MAX = (Number.MAX_SAFE_INTEGER || Math.pow(2, 53) - 1) - 1

var _idMap = {}
var _globalId = 0

function _getGlobalId() {
  _globalId = (_globalId + 1) % MAX
  if (_idMap[_globalId]) {
    return _getGlobalId()
  }
  return _globalId
}

export function setTimeout (cb, ms) {
  var id = _getGlobalId()
  var start = Date.now()
  _idMap[id] = raf(function loop() {
    if (!_idMap[id] && _idMap[id] !== 0) {
      return
    }
    var ind = Date.now() - start
    if (ind < ms) {
      _idMap[id] = raf(loop)
    } else {
      delete _idMap[id]
      cb()
    }
  })
  return id
}

export function clearTimeout (id) {
  var tid = _idMap[id]
  tid && caf(tid)
  delete _idMap[id]
}