de36b2aaba
Note that Prettier, purposely, has only limited [configuration options](https://prettier.io/docs/en/options.html). The configuration file is based on [the one in `mozilla central`](https://searchfox.org/mozilla-central/source/.prettierrc) with just a few additions (to avoid future breakage if the defaults ever changes). Prettier is being used for a couple of reasons: - To be consistent with `mozilla-central`, where Prettier is already in use across the tree. - To ensure a *consistent* coding style everywhere, which is automatically enforced during linting (since Prettier is used as an ESLint plugin). This thus ends "all" formatting disussions once and for all, removing the need for review comments on most stylistic matters. Many ESLint options are now redundant, and I've tried my best to remove all the now unnecessary options (but I may have missed some). Note also that since Prettier considers the `printWidth` option as a guide, rather than a hard rule, this patch resorts to a small hack in the ESLint config to ensure that *comments* won't become too long. *Please note:* This patch is generated automatically, by appending the `--fix` argument to the ESLint call used in the `gulp lint` task. It will thus require some additional clean-up, which will be done in a *separate* commit. (On a more personal note, I'll readily admit that some of the changes Prettier makes are *extremely* ugly. However, in the name of consistency we'll probably have to live with that.)
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";
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import { CSS_UNITS } from "./ui_utils";
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import { PDFPrintServiceFactory } from "./app";
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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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let 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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let 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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let 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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let 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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let canvas = document.createElement("canvas");
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let 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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