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Refactoring of printing code and mozPrintCallback polyfill #7697
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This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| /* Copyright 2016 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. | ||
| */ | ||
|
|
||
| 'use strict'; | ||
|
|
||
| (function (root, factory) { | ||
| if (typeof define === 'function' && define.amd) { | ||
| define('pdfjs-web/firefox_print_service', ['exports', 'pdfjs-web/ui_utils', | ||
| 'pdfjs-web/app', 'pdfjs-web/pdfjs'], factory); | ||
| } else if (typeof exports !== 'undefined') { | ||
| factory(exports, require('./ui_utils.js'), require('./app.js'), | ||
| require('./pdfjs.js')); | ||
| } else { | ||
| factory((root.pdfjsWebFirefoxPrintService = {}), root.pdfjsWebUIUtils, | ||
| root.pdfjsWebApp, root.pdfjsWebPDFJS); | ||
| } | ||
| }(this, function (exports, uiUtils, app, pdfjsLib) { | ||
| var CSS_UNITS = uiUtils.CSS_UNITS; | ||
| var PDFPrintServiceFactory = app.PDFPrintServiceFactory; | ||
|
|
||
| // Creates a placeholder with div and canvas with right size for the page. | ||
| function composePage(pdfDocument, pageNumber, size, printContainer) { | ||
| var canvas = document.createElement('canvas'); | ||
|
|
||
| // The size of the canvas in pixels for printing. | ||
| var PRINT_RESOLUTION = 150; | ||
| var PRINT_UNITS = PRINT_RESOLUTION / 72.0; | ||
| canvas.width = Math.floor(size.width * PRINT_UNITS); | ||
| canvas.height = Math.floor(size.height * PRINT_UNITS); | ||
|
|
||
| // The physical size of the canvas as specified by the PDF document. | ||
| canvas.style.width = Math.floor(size.width * CSS_UNITS) + 'px'; | ||
| canvas.style.height = Math.floor(size.height * CSS_UNITS) + 'px'; | ||
|
|
||
| var canvasWrapper = document.createElement('div'); | ||
| canvasWrapper.appendChild(canvas); | ||
| printContainer.appendChild(canvasWrapper); | ||
|
|
||
| canvas.mozPrintCallback = function(obj) { | ||
| // Printing/rendering the page. | ||
| var ctx = obj.context; | ||
|
|
||
| ctx.save(); | ||
| ctx.fillStyle = 'rgb(255, 255, 255)'; | ||
| ctx.fillRect(0, 0, canvas.width, canvas.height); | ||
| ctx.restore(); | ||
|
|
||
| pdfDocument.getPage(pageNumber).then(function (pdfPage) { | ||
| var renderContext = { | ||
| canvasContext: ctx, | ||
| transform: [PRINT_UNITS, 0, 0, PRINT_UNITS, 0, 0], | ||
| viewport: pdfPage.getViewport(1), | ||
| intent: 'print' | ||
| }; | ||
| return pdfPage.render(renderContext).promise; | ||
| }).then(function() { | ||
| // Tell the printEngine that rendering this canvas/page has finished. | ||
| obj.done(); | ||
| }, function(error) { | ||
| console.error(error); | ||
| // Tell the printEngine that rendering this canvas/page has failed. | ||
| // This will make the print process stop. | ||
| if ('abort' in obj) { | ||
| obj.abort(); | ||
| } else { | ||
| obj.done(); | ||
| } | ||
| }); | ||
| }; | ||
| } | ||
|
|
||
| function FirefoxPrintService(pdfDocument, pagesOverview, printContainer) { | ||
| this.pdfDocument = pdfDocument; | ||
| this.pagesOverview = pagesOverview; | ||
| this.printContainer = printContainer; | ||
| } | ||
|
|
||
| FirefoxPrintService.prototype = { | ||
| layout: function () { | ||
| var pdfDocument = this.pdfDocument; | ||
| var printContainer = this.printContainer; | ||
| var body = document.querySelector('body'); | ||
| body.setAttribute('data-pdfjsprinting', true); | ||
|
|
||
| for (var i = 0, ii = this.pagesOverview.length; i < ii; ++i) { | ||
| composePage(pdfDocument, i + 1, this.pagesOverview[i], printContainer); | ||
| } | ||
| }, | ||
|
|
||
| destroy: function () { | ||
| this.printContainer.textContent = ''; | ||
| } | ||
| }; | ||
|
|
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| PDFPrintServiceFactory.instance = { | ||
| get supportsPrinting() { | ||
| var canvas = document.createElement('canvas'); | ||
| var value = 'mozPrintCallback' in canvas; | ||
|
|
||
| return pdfjsLib.shadow(this, 'supportsPrinting', value); | ||
| }, | ||
|
|
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| createPrintService: function (pdfDocument, pagesOverview, printContainer) { | ||
| return new FirefoxPrintService(pdfDocument, pagesOverview, | ||
| printContainer); | ||
| } | ||
| }; | ||
|
|
||
| exports.FirefoxPrintService = FirefoxPrintService; | ||
| })); | ||
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This is called
renderPageinpdf_print_service.js. Can we name itrenderPagehere too for consistency?There was a problem hiding this comment.
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Not really, I added a comments to pdf_print_service