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- import { AnnotationMode, PixelsPerInch } from "pdfjs-lib";
- import { PDFPrintServiceFactory, PDFViewerApplication } from "./app.js";
- import { getXfaHtmlForPrinting } from "./print_utils.js";
- let activeService = null;
- let dialog = null;
- let overlayManager = null;
- function renderPage(
- activeServiceOnEntry,
- pdfDocument,
- pageNumber,
- size,
- printResolution,
- optionalContentConfigPromise,
- printAnnotationStoragePromise
- ) {
- const scratchCanvas = activeService.scratchCanvas;
-
- const PRINT_UNITS = printResolution / PixelsPerInch.PDF;
- scratchCanvas.width = Math.floor(size.width * PRINT_UNITS);
- scratchCanvas.height = Math.floor(size.height * PRINT_UNITS);
- const ctx = scratchCanvas.getContext("2d");
- ctx.save();
- ctx.fillStyle = "rgb(255, 255, 255)";
- ctx.fillRect(0, 0, scratchCanvas.width, scratchCanvas.height);
- ctx.restore();
- return Promise.all([
- pdfDocument.getPage(pageNumber),
- printAnnotationStoragePromise,
- ]).then(function ([pdfPage, printAnnotationStorage]) {
- const renderContext = {
- canvasContext: ctx,
- transform: [PRINT_UNITS, 0, 0, PRINT_UNITS, 0, 0],
- viewport: pdfPage.getViewport({ scale: 1, rotation: size.rotation }),
- intent: "print",
- annotationMode: AnnotationMode.ENABLE_STORAGE,
- optionalContentConfigPromise,
- printAnnotationStorage,
- };
- return pdfPage.render(renderContext).promise;
- });
- }
- function PDFPrintService(
- pdfDocument,
- pagesOverview,
- printContainer,
- printResolution,
- optionalContentConfigPromise = null,
- printAnnotationStoragePromise = null,
- l10n
- ) {
- this.pdfDocument = pdfDocument;
- this.pagesOverview = pagesOverview;
- this.printContainer = printContainer;
- this._printResolution = printResolution || 150;
- this._optionalContentConfigPromise =
- optionalContentConfigPromise || pdfDocument.getOptionalContentConfig();
- this._printAnnotationStoragePromise =
- printAnnotationStoragePromise || Promise.resolve();
- this.l10n = l10n;
- this.currentPage = -1;
-
- this.scratchCanvas = document.createElement("canvas");
- }
- PDFPrintService.prototype = {
- layout() {
- this.throwIfInactive();
- const body = document.querySelector("body");
- body.setAttribute("data-pdfjsprinting", true);
- const hasEqualPageSizes = this.pagesOverview.every(function (size) {
- return (
- size.width === this.pagesOverview[0].width &&
- size.height === this.pagesOverview[0].height
- );
- }, this);
- if (!hasEqualPageSizes) {
- console.warn(
- "Not all pages have the same size. The printed " +
- "result may be incorrect!"
- );
- }
-
-
-
-
-
-
-
-
-
- this.pageStyleSheet = document.createElement("style");
- const pageSize = this.pagesOverview[0];
- this.pageStyleSheet.textContent =
- "@page { size: " + pageSize.width + "pt " + pageSize.height + "pt;}";
- body.append(this.pageStyleSheet);
- },
- destroy() {
- if (activeService !== this) {
-
-
- return;
- }
- this.printContainer.textContent = "";
- const body = document.querySelector("body");
- body.removeAttribute("data-pdfjsprinting");
- if (this.pageStyleSheet) {
- this.pageStyleSheet.remove();
- this.pageStyleSheet = null;
- }
- this.scratchCanvas.width = this.scratchCanvas.height = 0;
- this.scratchCanvas = null;
- activeService = null;
- ensureOverlay().then(function () {
- if (overlayManager.active === dialog) {
- overlayManager.close(dialog);
- }
- });
- },
- renderPages() {
- if (this.pdfDocument.isPureXfa) {
- getXfaHtmlForPrinting(this.printContainer, this.pdfDocument);
- return Promise.resolve();
- }
- const pageCount = this.pagesOverview.length;
- const renderNextPage = (resolve, reject) => {
- this.throwIfInactive();
- if (++this.currentPage >= pageCount) {
- renderProgress(pageCount, pageCount, this.l10n);
- resolve();
- return;
- }
- const index = this.currentPage;
- renderProgress(index, pageCount, this.l10n);
- renderPage(
- this,
- this.pdfDocument,
- index + 1,
- this.pagesOverview[index],
- this._printResolution,
- this._optionalContentConfigPromise,
- this._printAnnotationStoragePromise
- )
- .then(this.useRenderedPage.bind(this))
- .then(function () {
- renderNextPage(resolve, reject);
- }, reject);
- };
- return new Promise(renderNextPage);
- },
- useRenderedPage() {
- this.throwIfInactive();
- const img = document.createElement("img");
- const scratchCanvas = this.scratchCanvas;
- if ("toBlob" in scratchCanvas) {
- scratchCanvas.toBlob(function (blob) {
- img.src = URL.createObjectURL(blob);
- });
- } else {
- img.src = scratchCanvas.toDataURL();
- }
- const wrapper = document.createElement("div");
- wrapper.className = "printedPage";
- wrapper.append(img);
- this.printContainer.append(wrapper);
- return new Promise(function (resolve, reject) {
- img.onload = resolve;
- img.onerror = reject;
- });
- },
- performPrint() {
- this.throwIfInactive();
- return new Promise(resolve => {
-
-
-
- setTimeout(() => {
- if (!this.active) {
- resolve();
- return;
- }
- print.call(window);
-
- setTimeout(resolve, 20);
- }, 0);
- });
- },
- get active() {
- return this === activeService;
- },
- throwIfInactive() {
- if (!this.active) {
- throw new Error("This print request was cancelled or completed.");
- }
- },
- };
- const print = window.print;
- window.print = function () {
- if (activeService) {
- console.warn("Ignored window.print() because of a pending print job.");
- return;
- }
- ensureOverlay().then(function () {
- if (activeService) {
- overlayManager.open(dialog);
- }
- });
- try {
- dispatchEvent("beforeprint");
- } finally {
- if (!activeService) {
- console.error("Expected print service to be initialized.");
- ensureOverlay().then(function () {
- if (overlayManager.active === dialog) {
- overlayManager.close(dialog);
- }
- });
- return;
- }
- const activeServiceOnEntry = activeService;
- activeService
- .renderPages()
- .then(function () {
- return activeServiceOnEntry.performPrint();
- })
- .catch(function () {
-
- })
- .then(function () {
-
-
-
-
-
- if (activeServiceOnEntry.active) {
- abort();
- }
- });
- }
- };
- function dispatchEvent(eventType) {
- const event = document.createEvent("CustomEvent");
- event.initCustomEvent(eventType, false, false, "custom");
- window.dispatchEvent(event);
- }
- function abort() {
- if (activeService) {
- activeService.destroy();
- dispatchEvent("afterprint");
- }
- }
- function renderProgress(index, total, l10n) {
- dialog ||= document.getElementById("printServiceDialog");
- const progress = Math.round((100 * index) / total);
- const progressBar = dialog.querySelector("progress");
- const progressPerc = dialog.querySelector(".relative-progress");
- progressBar.value = progress;
- l10n.get("print_progress_percent", { progress }).then(msg => {
- progressPerc.textContent = msg;
- });
- }
- window.addEventListener(
- "keydown",
- function (event) {
-
-
- if (
- event.keyCode === 80 &&
- (event.ctrlKey || event.metaKey) &&
- !event.altKey &&
- (!event.shiftKey || window.chrome || window.opera)
- ) {
- window.print();
- event.preventDefault();
- event.stopImmediatePropagation();
- }
- },
- true
- );
- if ("onbeforeprint" in window) {
-
-
- const stopPropagationIfNeeded = function (event) {
- if (event.detail !== "custom") {
- event.stopImmediatePropagation();
- }
- };
- window.addEventListener("beforeprint", stopPropagationIfNeeded);
- window.addEventListener("afterprint", stopPropagationIfNeeded);
- }
- let overlayPromise;
- function ensureOverlay() {
- if (!overlayPromise) {
- overlayManager = PDFViewerApplication.overlayManager;
- if (!overlayManager) {
- throw new Error("The overlay manager has not yet been initialized.");
- }
- dialog ||= document.getElementById("printServiceDialog");
- overlayPromise = overlayManager.register(
- dialog,
- true
- );
- document.getElementById("printCancel").onclick = abort;
- dialog.addEventListener("close", abort);
- }
- return overlayPromise;
- }
- PDFPrintServiceFactory.instance = {
- supportsPrinting: true,
- createPrintService(
- pdfDocument,
- pagesOverview,
- printContainer,
- printResolution,
- optionalContentConfigPromise,
- printAnnotationStoragePromise,
- l10n
- ) {
- if (activeService) {
- throw new Error("The print service is created and active.");
- }
- activeService = new PDFPrintService(
- pdfDocument,
- pagesOverview,
- printContainer,
- printResolution,
- optionalContentConfigPromise,
- printAnnotationStoragePromise,
- l10n
- );
- return activeService;
- },
- };
- export { PDFPrintService };
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