text: /* Copyright 2021 Mozilla Foundation
   *
   * 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 { XfaLayer } from "pdfjs-lib";
  
  /**
   * @typedef {Object} XfaLayerBuilderOptions
   * @property {HTMLDivElement} pageDiv
   * @property {PDFPage} pdfPage
   * @property {AnnotationStorage} [annotationStorage]
   */
  
  class XfaLayerBuilder {
    /**
     * @param {XfaLayerBuilderOptions} options
     */
    constructor({ pageDiv, pdfPage, annotationStorage }) {
      this.pageDiv = pageDiv;
      this.pdfPage = pdfPage;
      this.annotationStorage = annotationStorage;
  
      this.div = null;
      this._cancelled = false;
    }
  
    /**
     * @param {PageViewport} viewport
     * @param {string} intent (default value is 'display')
     * @returns {Promise<void>} A promise that is resolved when rendering of the
     *   annotations is complete.
     */
    render(viewport, intent = "display") {
      return this.pdfPage
        .getXfa()
        .then(xfa => {
          if (this._cancelled) {
            return;
          }
          const parameters = {
            viewport: viewport.clone({ dontFlip: true }),
            div: this.div,
            xfa,
            page: this.pdfPage,
            annotationStorage: this.annotationStorage,
          };
  
          if (this.div) {
            XfaLayer.update(parameters);
          } else {
            // Create an xfa layer div and render the form
            this.div = document.createElement("div");
            this.pageDiv.appendChild(this.div);
            parameters.div = this.div;
  
            XfaLayer.render(parameters);
          }
        })
        .catch(error => {
          console.error(error);
        });
    }
  
    cancel() {
      this._cancelled = true;
    }
  
    hide() {
      if (!this.div) {
        return;
      }
      this.div.hidden = true;
    }
  }
  
  /**
   * @implements IPDFXfaLayerFactory
   */
  class DefaultXfaLayerFactory {
    /**
     * @param {HTMLDivElement} pageDiv
     * @param {PDFPage} pdfPage
     * @param {AnnotationStorage} [annotationStorage]
     */
    createXfaLayerBuilder(pageDiv, pdfPage, annotationStorage = null) {
      return new XfaLayerBuilder({
        pageDiv,
        pdfPage,
        annotationStorage,
      });
    }
  }
  
  export { DefaultXfaLayerFactory, XfaLayerBuilder };
  