text: /**
   * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS-IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  import {Layout, applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
  import {realChildNodes} from '#core/dom/query';
  
  import {registerElement} from '#service/custom-element-registry';
  
  import {BaseElement} from '../../base-element';
  import {getEffectiveLayout} from '../../static-layout';
  
  class AmpLayout extends BaseElement {
    /** @override @nocollapse */
    static prerenderAllowed() {
      return true;
    }
  
    /** @override */
    isLayoutSupported(layout) {
      return layout == Layout.CONTAINER || isLayoutSizeDefined(layout);
    }
  
    /** @override */
    buildCallback() {
      buildDom(this.element);
    }
  }
  
  /**
   * @see amphtml/compiler/types.js for full description
   *
   * @param {!Element} element
   */
  export function buildDom(element) {
    const layout = getEffectiveLayout(element);
    if (layout == Layout.CONTAINER) {
      return;
    }
  
    const doc = element.ownerDocument;
    const container = doc.createElement('div');
    applyFillContent(container);
    realChildNodes(element).forEach((child) => {
      container.appendChild(child);
    });
    element.appendChild(container);
  }
  
  /**
   * @param {!Window} win Destination window for the new element.
   */
  export function installLayout(win) {
    registerElement(win, 'amp-layout', AmpLayout);
  }
  