Chris@0: /**
Chris@0: * DO NOT EDIT THIS FILE.
Chris@0: * See the following change record for more information,
Chris@0: * https://www.drupal.org/node/2815083
Chris@0: * @preserve
Chris@0: **/
Chris@0: 
Chris@0: (function ($, Drupal) {
Chris@0:   function TabbingManager() {
Chris@0:     this.stack = [];
Chris@0:   }
Chris@0: 
Chris@17:   function TabbingContext(options) {
Chris@17:     $.extend(this, {
Chris@17:       level: null,
Chris@17: 
Chris@17:       $tabbableElements: $(),
Chris@17: 
Chris@17:       $disabledElements: $(),
Chris@17: 
Chris@17:       released: false,
Chris@17: 
Chris@17:       active: false
Chris@17:     }, options);
Chris@17:   }
Chris@17: 
Chris@0:   $.extend(TabbingManager.prototype, {
Chris@0:     constrain: function constrain(elements) {
Chris@0:       var il = this.stack.length;
Chris@0:       for (var i = 0; i < il; i++) {
Chris@0:         this.stack[i].deactivate();
Chris@0:       }
Chris@0: 
Chris@0:       var $elements = $(elements).find(':tabbable').addBack(':tabbable');
Chris@0: 
Chris@0:       var tabbingContext = new TabbingContext({
Chris@0:         level: this.stack.length,
Chris@0:         $tabbableElements: $elements
Chris@0:       });
Chris@0: 
Chris@0:       this.stack.push(tabbingContext);
Chris@0: 
Chris@0:       tabbingContext.activate();
Chris@0: 
Chris@0:       $(document).trigger('drupalTabbingConstrained', tabbingContext);
Chris@0: 
Chris@0:       return tabbingContext;
Chris@0:     },
Chris@0:     release: function release() {
Chris@0:       var toActivate = this.stack.length - 1;
Chris@0:       while (toActivate >= 0 && this.stack[toActivate].released) {
Chris@0:         toActivate--;
Chris@0:       }
Chris@0: 
Chris@0:       this.stack.splice(toActivate + 1);
Chris@0: 
Chris@0:       if (toActivate >= 0) {
Chris@0:         this.stack[toActivate].activate();
Chris@0:       }
Chris@0:     },
Chris@0:     activate: function activate(tabbingContext) {
Chris@0:       var $set = tabbingContext.$tabbableElements;
Chris@0:       var level = tabbingContext.level;
Chris@0: 
Chris@0:       var $disabledSet = $(':tabbable').not($set);
Chris@0: 
Chris@0:       tabbingContext.$disabledElements = $disabledSet;
Chris@0: 
Chris@0:       var il = $disabledSet.length;
Chris@0:       for (var i = 0; i < il; i++) {
Chris@0:         this.recordTabindex($disabledSet.eq(i), level);
Chris@0:       }
Chris@0: 
Chris@0:       $disabledSet.prop('tabindex', -1).prop('autofocus', false);
Chris@0: 
Chris@0:       var $hasFocus = $set.filter('[autofocus]').eq(-1);
Chris@0: 
Chris@0:       if ($hasFocus.length === 0) {
Chris@0:         $hasFocus = $set.eq(0);
Chris@0:       }
Chris@0:       $hasFocus.trigger('focus');
Chris@0:     },
Chris@0:     deactivate: function deactivate(tabbingContext) {
Chris@0:       var $set = tabbingContext.$disabledElements;
Chris@0:       var level = tabbingContext.level;
Chris@0:       var il = $set.length;
Chris@0:       for (var i = 0; i < il; i++) {
Chris@0:         this.restoreTabindex($set.eq(i), level);
Chris@0:       }
Chris@0:     },
Chris@0:     recordTabindex: function recordTabindex($el, level) {
Chris@0:       var tabInfo = $el.data('drupalOriginalTabIndices') || {};
Chris@0:       tabInfo[level] = {
Chris@0:         tabindex: $el[0].getAttribute('tabindex'),
Chris@0:         autofocus: $el[0].hasAttribute('autofocus')
Chris@0:       };
Chris@0:       $el.data('drupalOriginalTabIndices', tabInfo);
Chris@0:     },
Chris@0:     restoreTabindex: function restoreTabindex($el, level) {
Chris@0:       var tabInfo = $el.data('drupalOriginalTabIndices');
Chris@0:       if (tabInfo && tabInfo[level]) {
Chris@0:         var data = tabInfo[level];
Chris@0:         if (data.tabindex) {
Chris@0:           $el[0].setAttribute('tabindex', data.tabindex);
Chris@0:         } else {
Chris@0:             $el[0].removeAttribute('tabindex');
Chris@0:           }
Chris@0:         if (data.autofocus) {
Chris@0:           $el[0].setAttribute('autofocus', 'autofocus');
Chris@0:         }
Chris@0: 
Chris@0:         if (level === 0) {
Chris@0:           $el.removeData('drupalOriginalTabIndices');
Chris@0:         } else {
Chris@0:           var levelToDelete = level;
Chris@0:           while (tabInfo.hasOwnProperty(levelToDelete)) {
Chris@0:             delete tabInfo[levelToDelete];
Chris@0:             levelToDelete++;
Chris@0:           }
Chris@0:           $el.data('drupalOriginalTabIndices', tabInfo);
Chris@0:         }
Chris@0:       }
Chris@0:     }
Chris@0:   });
Chris@0: 
Chris@0:   $.extend(TabbingContext.prototype, {
Chris@0:     release: function release() {
Chris@0:       if (!this.released) {
Chris@0:         this.deactivate();
Chris@0:         this.released = true;
Chris@0:         Drupal.tabbingManager.release(this);
Chris@0: 
Chris@0:         $(document).trigger('drupalTabbingContextReleased', this);
Chris@0:       }
Chris@0:     },
Chris@0:     activate: function activate() {
Chris@0:       if (!this.active && !this.released) {
Chris@0:         this.active = true;
Chris@0:         Drupal.tabbingManager.activate(this);
Chris@0: 
Chris@0:         $(document).trigger('drupalTabbingContextActivated', this);
Chris@0:       }
Chris@0:     },
Chris@0:     deactivate: function deactivate() {
Chris@0:       if (this.active) {
Chris@0:         this.active = false;
Chris@0:         Drupal.tabbingManager.deactivate(this);
Chris@0: 
Chris@0:         $(document).trigger('drupalTabbingContextDeactivated', this);
Chris@0:       }
Chris@0:     }
Chris@0:   });
Chris@0: 
Chris@0:   if (Drupal.tabbingManager) {
Chris@0:     return;
Chris@0:   }
Chris@0: 
Chris@0:   Drupal.tabbingManager = new TabbingManager();
Chris@0: })(jQuery, Drupal);