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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 'use strict'; | 5 'use strict'; |
| 6 | 6 |
| 7 /** | 7 /** |
| 8 * Global PDFViewer object, accessible for testing. | 8 * Global PDFViewer object, accessible for testing. |
| 9 * @type Object | 9 * @type Object |
| 10 */ | 10 */ |
| 11 var viewer; | 11 var viewer; |
| 12 | 12 |
| 13 | 13 |
| 14 (function() { | 14 (function() { |
| 15 /** | 15 /** |
| 16 * Stores any pending messages received which should be passed to the | 16 * Stores any pending messages received which should be passed to the |
| 17 * PDFViewer when it is created. | 17 * PDFViewer when it is created. |
| 18 * @type Array | 18 * @type Array |
| 19 */ | 19 */ |
| 20 var pendingMessages = []; | 20 var pendingMessages = []; |
| 21 | 21 |
| 22 /** | 22 /** |
| 23 * Handles events that are received prior to the PDFViewer being created. | 23 * Handles events that are received prior to the PDFViewer being created. |
| 24 * @param {Object} message A message event received. | 24 * @param {Object} message A message event received. |
| 25 */ | 25 */ |
| 26 function handleScriptingMessage(message) { | 26 function handleScriptingMessage(message) { |
| 27 pendingMessages.push(message); | 27 pendingMessages.push(message); |
| 28 } | 28 } |
| 29 | 29 |
| 30 /** | 30 /** |
| 31 * Initialize the global PDFViewer and pass any outstanding messages to it. | 31 * Initialize the global PDFViewer and pass any outstanding messages to it. |
| 32 * @param {Object} browserApi An object providing an API to the browser. | 32 * @param {Object} browserApi An object providing an API to the browser. |
| 33 */ | 33 */ |
| 34 function initViewer(browserApi) { | 34 function initViewer(browserApi) { |
| 35 // PDFViewer will handle any messages after it is created. | 35 // PDFViewer will handle any messages after it is created. |
| 36 window.removeEventListener('message', handleScriptingMessage, false); | 36 window.removeEventListener('message', handleScriptingMessage, false); |
| 37 viewer = new PDFViewer(browserApi); | 37 viewer = new PDFViewer(browserApi); |
| 38 while (pendingMessages.length > 0) | 38 while (pendingMessages.length > 0) |
| 39 viewer.handleScriptingMessage(pendingMessages.shift()); | 39 viewer.handleScriptingMessage(pendingMessages.shift()); |
| 40 } | 40 } |
| 41 | 41 |
| 42 /** | 42 /** |
| 43 * Entrypoint for starting the PDF viewer. This function obtains the browser | 43 * Entrypoint for starting the PDF viewer. This function obtains the browser |
| 44 * API for the PDF and constructs a PDFViewer object with it. | 44 * API for the PDF and constructs a PDFViewer object with it. |
| 45 */ | 45 */ |
| 46 function main() { | 46 function main() { |
| 47 // Set up an event listener to catch scripting messages which are sent prior | 47 // Set up an event listener to catch scripting messages which are sent prior |
| 48 // to the PDFViewer being created. | 48 // to the PDFViewer being created. |
| 49 window.addEventListener('message', handleScriptingMessage, false); | 49 window.addEventListener('message', handleScriptingMessage, false); |
| 50 | 50 |
| 51 createBrowserApi().then(initViewer); | 51 createBrowserApi().then(initViewer); |
| 52 } | 52 } |
| 53 | 53 |
| 54 main(); | 54 main(); |
| 55 })(); | 55 })(); |
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