94 lines
3.3 KiB
JavaScript
94 lines
3.3 KiB
JavaScript
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/**
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* @file
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* User permission page behaviors.
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*/
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(function($, Drupal) {
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/**
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* Shows checked and disabled checkboxes for inherited permissions.
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*
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* @type {Drupal~behavior}
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*
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* @prop {Drupal~behaviorAttach} attach
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* Attaches functionality to the permissions table.
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*/
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Drupal.behaviors.permissions = {
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attach(context) {
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const self = this;
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$('table#permissions')
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.once('permissions')
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.each(function() {
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// On a site with many roles and permissions, this behavior initially
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// has to perform thousands of DOM manipulations to inject checkboxes
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// and hide them. By detaching the table from the DOM, all operations
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// can be performed without triggering internal layout and re-rendering
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// processes in the browser.
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const $table = $(this);
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let $ancestor;
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let method;
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if ($table.prev().length) {
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$ancestor = $table.prev();
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method = 'after';
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} else {
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$ancestor = $table.parent();
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method = 'append';
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}
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$table.detach();
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// Create dummy checkboxes. We use dummy checkboxes instead of reusing
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// the existing checkboxes here because new checkboxes don't alter the
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// submitted form. If we'd automatically check existing checkboxes, the
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// permission table would be polluted with redundant entries. This
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// is deliberate, but desirable when we automatically check them.
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const $dummy = $(
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'<input type="checkbox" class="dummy-checkbox js-dummy-checkbox" disabled="disabled" checked="checked" />',
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)
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.attr(
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'title',
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Drupal.t(
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'This permission is inherited from the authenticated user role.',
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),
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)
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.hide();
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$table
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.find('input[type="checkbox"]')
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.not('.js-rid-anonymous, .js-rid-authenticated')
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.addClass('real-checkbox js-real-checkbox')
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.after($dummy);
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// Initialize the authenticated user checkbox.
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$table
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.find('input[type=checkbox].js-rid-authenticated')
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.on('click.permissions', self.toggle)
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// .triggerHandler() cannot be used here, as it only affects the first
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// element.
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.each(self.toggle);
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// Re-insert the table into the DOM.
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$ancestor[method]($table);
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});
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},
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/**
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* Toggles all dummy checkboxes based on the checkboxes' state.
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*
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* If the "authenticated user" checkbox is checked, the checked and disabled
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* checkboxes are shown, the real checkboxes otherwise.
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*/
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toggle() {
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const authCheckbox = this;
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const $row = $(this).closest('tr');
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// jQuery performs too many layout calculations for .hide() and .show(),
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// leading to a major page rendering lag on sites with many roles and
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// permissions. Therefore, we toggle visibility directly.
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$row.find('.js-real-checkbox').each(function() {
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this.style.display = authCheckbox.checked ? 'none' : '';
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});
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$row.find('.js-dummy-checkbox').each(function() {
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this.style.display = authCheckbox.checked ? '' : 'none';
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});
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},
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};
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})(jQuery, Drupal);
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