diff core/modules/user/user.permissions.es6.js @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/modules/user/user.permissions.es6.js	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,84 @@
+/**
+ * @file
+ * User permission page behaviors.
+ */
+
+(function ($, Drupal) {
+  /**
+   * Shows checked and disabled checkboxes for inherited permissions.
+   *
+   * @type {Drupal~behavior}
+   *
+   * @prop {Drupal~behaviorAttach} attach
+   *   Attaches functionality to the permissions table.
+   */
+  Drupal.behaviors.permissions = {
+    attach(context) {
+      const self = this;
+      $('table#permissions').once('permissions').each(function () {
+        // On a site with many roles and permissions, this behavior initially
+        // has to perform thousands of DOM manipulations to inject checkboxes
+        // and hide them. By detaching the table from the DOM, all operations
+        // can be performed without triggering internal layout and re-rendering
+        // processes in the browser.
+        const $table = $(this);
+        let $ancestor;
+        let method;
+        if ($table.prev().length) {
+          $ancestor = $table.prev();
+          method = 'after';
+        }
+        else {
+          $ancestor = $table.parent();
+          method = 'append';
+        }
+        $table.detach();
+
+        // Create dummy checkboxes. We use dummy checkboxes instead of reusing
+        // the existing checkboxes here because new checkboxes don't alter the
+        // submitted form. If we'd automatically check existing checkboxes, the
+        // permission table would be polluted with redundant entries. This
+        // is deliberate, but desirable when we automatically check them.
+        const $dummy = $('<input type="checkbox" class="dummy-checkbox js-dummy-checkbox" disabled="disabled" checked="checked" />')
+          .attr('title', Drupal.t('This permission is inherited from the authenticated user role.'))
+          .hide();
+
+        $table
+          .find('input[type="checkbox"]')
+          .not('.js-rid-anonymous, .js-rid-authenticated')
+          .addClass('real-checkbox js-real-checkbox')
+          .after($dummy);
+
+        // Initialize the authenticated user checkbox.
+        $table.find('input[type=checkbox].js-rid-authenticated')
+          .on('click.permissions', self.toggle)
+          // .triggerHandler() cannot be used here, as it only affects the first
+          // element.
+          .each(self.toggle);
+
+        // Re-insert the table into the DOM.
+        $ancestor[method]($table);
+      });
+    },
+
+    /**
+     * Toggles all dummy checkboxes based on the checkboxes' state.
+     *
+     * If the "authenticated user" checkbox is checked, the checked and disabled
+     * checkboxes are shown, the real checkboxes otherwise.
+     */
+    toggle() {
+      const authCheckbox = this;
+      const $row = $(this).closest('tr');
+      // jQuery performs too many layout calculations for .hide() and .show(),
+      // leading to a major page rendering lag on sites with many roles and
+      // permissions. Therefore, we toggle visibility directly.
+      $row.find('.js-real-checkbox').each(function () {
+        this.style.display = (authCheckbox.checked ? 'none' : '');
+      });
+      $row.find('.js-dummy-checkbox').each(function () {
+        this.style.display = (authCheckbox.checked ? '' : 'none');
+      });
+    },
+  };
+}(jQuery, Drupal));