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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
'use strict';
/**
* Global PDFViewer object, accessible for testing.
* @type Object
*/
var viewer;
(function() {
/**
* Stores any pending messages received which should be passed to the
* PDFViewer when it is created.
* @type Array
*/
var pendingMessages = [];
/**
* Handles events that are received prior to the PDFViewer being created.
* @param {Object} message A message event received.
*/
function handleScriptingMessage(message) {
pendingMessages.push(message);
}
/**
* Initialize the global PDFViewer and pass any outstanding messages to it.
* @param {Object} browserApi An object providing an API to the browser.
*/
function initViewer(browserApi) {
// PDFViewer will handle any messages after it is created.
window.removeEventListener('message', handleScriptingMessage, false);
viewer = new PDFViewer(browserApi);
while (pendingMessages.length > 0)
viewer.handleScriptingMessage(pendingMessages.shift());
}
/**
* Entrypoint for starting the PDF viewer. This function obtains the browser
* API for the PDF and constructs a PDFViewer object with it.
*/
function main() {
// Set up an event listener to catch scripting messages which are sent prior
// to the PDFViewer being created.
window.addEventListener('message', handleScriptingMessage, false);
createBrowserApi().then(initViewer);
};
main();
})();
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