web/print_utils.js - master - githubmirror/pdf.js

web/print_utils.js

61 строка2 KB

Jonas Jenwald

[api-minor] Move the `getXfaPageViewport` helper into the `XfaLayer` class

16 май 2026, 13:31

16 май 2026, 13:31e8f07d7

/* 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 { PixelsPerInch, XfaLayer } from "pdfjs-lib";
import { SimpleLinkService } from "./pdf_link_service.js";
import { XfaLayerBuilder } from "./xfa_layer_builder.js";

class BasePrintServiceFactory {
  constructor() {
    if (typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) {
      throw new Error("Cannot initialize BasePrintServiceFactory.");
    }
  }

  static initGlobals(app) {}

  static get supportsPrinting() {
    throw new Error("Not implemented: supportsPrinting");
  }

  static createPrintService(params) {
    throw new Error("Not implemented: createPrintService");
  }
}

function getXfaHtmlForPrinting(printContainer, pdfDocument) {
  const xfaHtml = pdfDocument.allXfaHtml;
  const linkService = new SimpleLinkService();
  const scale = Math.round(PixelsPerInch.PDF_TO_CSS_UNITS * 100) / 100;

  for (const xfaPage of xfaHtml.children) {
    const page = document.createElement("div");
    page.className = "xfaPrintedPage";
    printContainer.append(page);

    const builder = new XfaLayerBuilder({
      pdfPage: null,
      annotationStorage: pdfDocument.annotationStorage,
      linkService,
      xfaHtml: xfaPage,
    });
    const viewport = XfaLayer.getPageViewport(xfaPage, { scale });

    builder.render({ viewport, intent: "print" });
    page.append(builder.div);
  }
}

export { BasePrintServiceFactory, getXfaHtmlForPrinting };