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94 lines
3.1 KiB
94 lines
3.1 KiB
8 years ago
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/* Copyright 2017 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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'use strict';
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var uiUtils = require('./ui_utils.js');
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var app = require('./app.js');
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var pdfjsLib = require('./pdfjs.js');
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var CSS_UNITS = uiUtils.CSS_UNITS;
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var PDFPrintServiceFactory = app.PDFPrintServiceFactory;
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function composePage(pdfDocument, pageNumber, size, printContainer) {
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var canvas = document.createElement('canvas');
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var PRINT_RESOLUTION = 150;
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var 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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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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var 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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var 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.getPage(pageNumber).then(function (pdfPage) {
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var renderContext = {
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canvasContext: ctx,
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transform: [
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PRINT_UNITS,
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0,
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0,
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PRINT_UNITS,
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0,
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0
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],
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viewport: pdfPage.getViewport(1, 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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}).then(function () {
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obj.done();
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}, function (error) {
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console.error(error);
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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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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: function () {
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var pdfDocument = this.pdfDocument;
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var printContainer = this.printContainer;
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var body = document.querySelector('body');
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body.setAttribute('data-pdfjsprinting', true);
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for (var i = 0, ii = this.pagesOverview.length; i < ii; ++i) {
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composePage(pdfDocument, i + 1, this.pagesOverview[i], printContainer);
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}
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},
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destroy: function () {
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this.printContainer.textContent = '';
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}
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};
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PDFPrintServiceFactory.instance = {
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get supportsPrinting() {
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var canvas = document.createElement('canvas');
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var value = 'mozPrintCallback' in canvas;
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return pdfjsLib.shadow(this, 'supportsPrinting', value);
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},
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createPrintService: function (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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exports.FirefoxPrintService = FirefoxPrintService;
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