Anjing Webshells

Website : rimsha.abasa.com
: / var / canvas / ui / shared / calendar / jquery /
Filename : coupleTimeFields.js
back
//
// Copyright (C) 2015 - 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/>.

export default function coupleTimeFields($start, $end, $date) {
  // construct blur callback that couples them in order so that $start can
  // never be less than $end
  function blur($blurred) {
    if ($date && $blurred === $date) {
      const date = $date.data('unfudged-date')
      if (date) {
        ;[$start, $end].forEach(el => {
          const instance = el.data('instance')
          if (instance) instance.setDate(date)
        })
      }
      return
    }

    // these will be null if invalid or blank, and date values otherwise.
    let start = $start.data('unfudged-date')
    const end = $end.data('unfudged-date')

    const realStart = $start.data('date')
    const realEnd = $end.data('date')

    if (start && end) {
      // we only care about comparing the time of day, not the date portion
      // (since they'll both be interpreted relative to some other date field
      // later)
      start = start.clone()
      start.setFullYear(end.getFullYear())
      start.setMonth(end.getMonth())
      start.setDate(end.getDate())

      if (realEnd < realStart) {
        // both present and valid, but violate expected ordering, set the one
        // not just changed equal to the one just changed
        if ($blurred === $end) {
          $start.data('instance').setTime(end)
        } else {
          $end.data('instance').setTime(start)
        }
      }
    }
  }

  // use that blur function for both fields
  $start.blur(() => blur($start))
  $end.blur(() => blur($end))
  if ($date) {
    $date.on('blur change', () => blur($date))
    blur($date)
  }

  // trigger initial coupling check
  blur($end)
}