36881e3770
In order to eventually get rid of SystemJS and start using native `import`s instead, we'll need to provide "complete" file identifiers since otherwise there'll be MIME type errors when attempting to use `import`.
118 lines
3.7 KiB
JavaScript
118 lines
3.7 KiB
JavaScript
/* Copyright 2016 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { AppOptions } from "./app_options.js";
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import { CSS_UNITS } from "./ui_utils.js";
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import { PDFPrintServiceFactory } from "./app.js";
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import { shadow } from "pdfjs-lib";
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// Creates a placeholder with div and canvas with right size for the page.
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function composePage(pdfDocument, pageNumber, size, printContainer) {
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const canvas = document.createElement("canvas");
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// The size of the canvas in pixels for printing.
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const PRINT_RESOLUTION = AppOptions.get("printResolution") || 150;
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const PRINT_UNITS = PRINT_RESOLUTION / 72.0;
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canvas.width = Math.floor(size.width * PRINT_UNITS);
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canvas.height = Math.floor(size.height * PRINT_UNITS);
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// The physical size of the canvas as specified by the PDF document.
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canvas.style.width = Math.floor(size.width * CSS_UNITS) + "px";
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canvas.style.height = Math.floor(size.height * CSS_UNITS) + "px";
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const canvasWrapper = document.createElement("div");
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canvasWrapper.appendChild(canvas);
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printContainer.appendChild(canvasWrapper);
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canvas.mozPrintCallback = function(obj) {
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// Printing/rendering the page.
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const ctx = obj.context;
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ctx.save();
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ctx.fillStyle = "rgb(255, 255, 255)";
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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ctx.restore();
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pdfDocument
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.getPage(pageNumber)
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.then(function(pdfPage) {
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const renderContext = {
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canvasContext: ctx,
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transform: [PRINT_UNITS, 0, 0, PRINT_UNITS, 0, 0],
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viewport: pdfPage.getViewport({ scale: 1, rotation: size.rotation }),
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intent: "print",
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};
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return pdfPage.render(renderContext).promise;
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})
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.then(
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function() {
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// Tell the printEngine that rendering this canvas/page has finished.
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obj.done();
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},
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function(error) {
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console.error(error);
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// Tell the printEngine that rendering this canvas/page has failed.
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// This will make the print process stop.
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if ("abort" in obj) {
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obj.abort();
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} else {
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obj.done();
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}
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}
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);
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};
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}
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function FirefoxPrintService(pdfDocument, pagesOverview, printContainer) {
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this.pdfDocument = pdfDocument;
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this.pagesOverview = pagesOverview;
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this.printContainer = printContainer;
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}
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FirefoxPrintService.prototype = {
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layout() {
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const { pdfDocument, pagesOverview, printContainer } = this;
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const body = document.querySelector("body");
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body.setAttribute("data-pdfjsprinting", true);
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for (let i = 0, ii = pagesOverview.length; i < ii; ++i) {
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composePage(pdfDocument, i + 1, pagesOverview[i], printContainer);
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}
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},
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destroy() {
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this.printContainer.textContent = "";
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const body = document.querySelector("body");
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body.removeAttribute("data-pdfjsprinting");
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},
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};
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PDFPrintServiceFactory.instance = {
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get supportsPrinting() {
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const canvas = document.createElement("canvas");
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const value = "mozPrintCallback" in canvas;
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return shadow(this, "supportsPrinting", value);
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},
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createPrintService(pdfDocument, pagesOverview, printContainer) {
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return new FirefoxPrintService(pdfDocument, pagesOverview, printContainer);
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},
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};
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export { FirefoxPrintService };
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