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Directory : /proc/self/cwd/opt/libreoffice6.4/help/

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Current File : //proc/self/cwd/opt/libreoffice6.4/help/a11y-toggle.js

/*
MIT License

Copyright (c) 2016 Edenspiekermann

*/

(function () {
  'use strict';

  var internalId = 0;
  var togglesMap = {};
  var targetsMap = {};

  function $ (selector, context) {
    return Array.prototype.slice.call(
      (context || document).querySelectorAll(selector)
    );
  }

  function getClosestToggle (element) {
    if (element.closest) {
      return element.closest('[data-a11y-toggle]');
    }

    while (element) {
      if (element.nodeType === 1 && element.hasAttribute('data-a11y-toggle')) {
        return element;
      }

      element = element.parentNode;
    }

    return null;
  }

  function handleToggle (toggle) {
    var target = toggle && targetsMap[toggle.getAttribute('aria-controls')];

    if (!target) {
      return false;
    }

    var toggles = togglesMap['#' + target.id];
    var isExpanded = target.getAttribute('aria-hidden') === 'false';

    target.setAttribute('aria-hidden', isExpanded);
    toggles.forEach(function (toggle) {
      toggle.setAttribute('aria-expanded', !isExpanded);
    });
  }

  var initA11yToggle = function (context) {
    togglesMap = $('[data-a11y-toggle]', context).reduce(function (acc, toggle) {
      var selector = '#' + toggle.getAttribute('data-a11y-toggle');
      acc[selector] = acc[selector] || [];
      acc[selector].push(toggle);
      return acc;
    }, togglesMap);

    var targets = Object.keys(togglesMap);
    targets.length && $(targets).forEach(function (target) {
      var toggles = togglesMap['#' + target.id];
      var isExpanded = target.hasAttribute('data-a11y-toggle-open');
      var labelledby = [];

      toggles.forEach(function (toggle) {
        toggle.id || toggle.setAttribute('id', 'a11y-toggle-' + internalId++);
        toggle.setAttribute('aria-controls', target.id);
        toggle.setAttribute('aria-expanded', isExpanded);
        labelledby.push(toggle.id);
      });

      target.setAttribute('aria-hidden', !isExpanded);
      target.hasAttribute('aria-labelledby') || target.setAttribute('aria-labelledby', labelledby.join(' '));

      targetsMap[target.id] = target;
    });
  };

  document.addEventListener('DOMContentLoaded', function () {
    initA11yToggle();
  });

  document.addEventListener('click', function (event) {
    var toggle = getClosestToggle(event.target);
    handleToggle(toggle);
  });

  document.addEventListener('keyup', function (event) {
    if (event.which === 13 || event.which === 32) {
      var toggle = getClosestToggle(event.target);
      if (toggle && toggle.getAttribute('role') === 'button') {
        handleToggle(toggle);
      }
    }
  });

  window && (window.a11yToggle = initA11yToggle);
})();

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