canvas-lms/spec/coffeescripts/helpers/util.js

/*
 * Copyright (C) 2013 - present Instructure, Inc.
 *
 * This file is part of Canvas.
 *
 * Canvas is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by the Free
 * Software Foundation, version 3 of the License.
 *
 * Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

import $ from 'jquery'
import _ from 'underscore'

const debounce = _.debounce

export function closeDialog() {
  return $('.ui-dialog-content').dialog('close')
}

export function useOldDebounce() {
  // this version of debounce works with sinon's useFakeTimers
  return (_.debounce = (func, wait, immediate) =>
    function() {
      let result
      const context = this
      const args = arguments
      const timestamp = new Date()
      const later = function() {
        let timeout
        const last = new Date() - timestamp
        if (last < wait) {
          return (timeout = setTimeout(later, wait - last))
        } else {
          timeout = null
          if (!immediate) {
            let result
            return (result = func.apply(context, args))
          }
        }
      }
      const callNow = immediate && !timeout
      if (!timeout) {
        var timeout = setTimeout(later, wait)
      }
      if (callNow) {
        result = func.apply(context, args)
      }
      return result
    })
}

export function useNormalDebounce() {
  return (_.debounce = debounce)
}