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Merge pull request #711 from jviereck/worker_feature

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Feature detection
This commit is contained in:
Brendan Dahl 2011-11-02 15:16:31 -07:00
commit 43dbc3a84d
8 changed files with 123 additions and 63 deletions
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6
examples/helloworld/index.html
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@ -3,6 +3,7 @@
<head> <head>
<!-- In production, only one script (pdf.js) is necessary --> <!-- In production, only one script (pdf.js) is necessary -->
<!-- In production, change the content of PDFJS.workerSrc below -->
<script type="text/javascript" src="../../src/core.js"></script> <script type="text/javascript" src="../../src/core.js"></script>
<script type="text/javascript" src="../../src/util.js"></script> <script type="text/javascript" src="../../src/util.js"></script>
<script type="text/javascript" src="../../src/canvas.js"></script> <script type="text/javascript" src="../../src/canvas.js"></script>
@ -22,6 +23,11 @@
<script type="text/javascript" src="../../src/stream.js"></script> <script type="text/javascript" src="../../src/stream.js"></script>
<script type="text/javascript" src="../../src/worker.js"></script> <script type="text/javascript" src="../../src/worker.js"></script>
<script type="text/javascript">
// Specify the main script used to create a new PDF.JS web worker.
// In production, change this to point to the combined `pdf.js` file.
PDFJS.workerSrc = '../../src/worker_loader.js';
</script>
<script type="text/javascript" src="hello.js"></script> <script type="text/javascript" src="hello.js"></script>
</head> </head>

13
src/core.js
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@ -472,7 +472,18 @@ var PDFDoc = (function pdfDoc() {
this.pageCache = []; this.pageCache = [];
if (useWorker) { if (useWorker) {
var worker = new Worker('../src/worker_loader.js'); var workerSrc = PDFJS.workerSrc;
if (typeof workerSrc === 'undefined') {
throw 'No PDFJS.workerSrc specified';
}
var worker = new Worker(workerSrc);
// Tell the worker the file it was created from.
worker.postMessage({
action: 'workerSrc',
data: workerSrc
});
} else { } else {
// If we don't use a worker, just post/sendMessage to the main thread. // If we don't use a worker, just post/sendMessage to the main thread.
var worker = { var worker = {

3
src/pdf.js
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@ -4,12 +4,11 @@
var PDFJS = {}; var PDFJS = {};
(function pdfjsWrapper() { (function pdfjsWrapper() {
// Use strict in our context only - users might not want it // Use strict in our context only - users might not want it
'use strict'; 'use strict';
// Files are inserted below - see Makefile // Files are inserted below - see Makefile
/* PDFJSSCRIPT_INCLUDE_ALL */ /* PDFJSSCRIPT_INCLUDE_ALL */
})(); }).call((typeof window === 'undefined') ? this : window);

10
src/worker.js
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@ -47,6 +47,13 @@ var WorkerProcessorHandler = {
setup: function wphSetup(handler) { setup: function wphSetup(handler) {
var pdfDoc = null; var pdfDoc = null;
handler.on('workerSrc', function wphSetupWorkerSrc(data) {
// In development, the `workerSrc` message is handled in the
// `worker_loader.js` file. In production the workerProcessHandler is
// called for this. This servers as a dummy to prevent calling an
// undefined action `workerSrc`.
});
handler.on('doc', function wphSetupDoc(data) { handler.on('doc', function wphSetupDoc(data) {
// Create only the model of the PDFDoc, which is enough for // Create only the model of the PDFDoc, which is enough for
// processing the content of the pdf. // processing the content of the pdf.
@ -176,8 +183,7 @@ var workerConsole = {
if (typeof window === 'undefined') { if (typeof window === 'undefined') {
globalScope.console = workerConsole; globalScope.console = workerConsole;
// Listen for messages from the main thread. var handler = new MessageHandler('worker_processor', this);
var handler = new MessageHandler('worker_processor', globalScope);
WorkerProcessorHandler.setup(handler); WorkerProcessorHandler.setup(handler);
} }

64
src/worker_loader.js
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@ -3,22 +3,50 @@
'use strict'; 'use strict';
importScripts('../src/core.js'); function onMessageLoader(evt) {
importScripts('../src/util.js'); // Reset the `onmessage` function as it was only set to call
importScripts('../src/canvas.js'); // this function the first time a message is passed to the worker
importScripts('../src/obj.js'); // but shouldn't get called anytime afterwards.
importScripts('../src/function.js'); this.onmessage = null;
importScripts('../src/charsets.js');
importScripts('../src/cidmaps.js');
importScripts('../src/colorspace.js');
importScripts('../src/crypto.js');
importScripts('../src/evaluator.js');
importScripts('../src/fonts.js');
importScripts('../src/glyphlist.js');
importScripts('../src/image.js');
importScripts('../src/metrics.js');
importScripts('../src/parser.js');
importScripts('../src/pattern.js');
importScripts('../src/stream.js');
importScripts('../src/worker.js');
if (evt.data.action !== 'workerSrc') {
throw 'Worker expects first message to be `workerSrc`';
}
// Content of `PDFJS.workerSrc` as defined on the main thread.
var workerSrc = evt.data.data;
// Extract the directory that contains the source files to load.
// Assuming the source files have the same relative possition as the
// `workerSrc` file.
var dir = workerSrc.substring(0, workerSrc.lastIndexOf('/') + 1);
// List of files to include;
var files = [
'core.js',
'util.js',
'canvas.js',
'obj.js',
'function.js',
'charsets.js',
'cidmaps.js',
'colorspace.js',
'crypto.js',
'evaluator.js',
'fonts.js',
'glyphlist.js',
'image.js',
'metrics.js',
'parser.js',
'pattern.js',
'stream.js',
'worker.js'
];
// Load all the files.
for (var i = 0; i < files.length; i++) {
importScripts(dir + files[i]);
}
}
this.onmessage = onMessageLoader.bind(this);

4
test/test_slave.html
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@ -22,6 +22,10 @@
<script type="text/javascript" src="/src/stream.js"></script> <script type="text/javascript" src="/src/stream.js"></script>
<script type="text/javascript" src="/src/worker.js"></script> <script type="text/javascript" src="/src/worker.js"></script>
<script type="text/javascript" src="driver.js"></script> <script type="text/javascript" src="driver.js"></script>
<script type="text/javascript">
PDFJS.workerSrc = '/src/worker_loader.js';
</script>
</head> </head>
<body> <body>

4
web/viewer-snippet.html
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@ -1,2 +1,6 @@
<!-- This snippet is used in production, see Makefile --> <!-- This snippet is used in production, see Makefile -->
<script type="text/javascript" src="../build/pdf.js"></script> <script type="text/javascript" src="../build/pdf.js"></script>
<script type="text/javascript">
// This specifies the location of the pdf.js file.
PDFJS.workerSrc = "../build/pdf.js";
</script>

4
web/viewer.html
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@ -3,10 +3,10 @@
<head> <head>
<title>Simple pdf.js page viewer</title> <title>Simple pdf.js page viewer</title>
<link rel="stylesheet" href="viewer.css"/> <link rel="stylesheet" href="viewer.css"/>
<script type="text/javascript" src="compatibility.js"></script> <script type="text/javascript" src="compatibility.js"></script>
<!-- PDFJSSCRIPT_INCLUDE_BUILD --> <!-- PDFJSSCRIPT_INCLUDE_BUILD -->
<script type="text/javascript" src="../src/core.js"></script> <!-- PDFJSSCRIPT_REMOVE --> <script type="text/javascript" src="../src/core.js"></script> <!-- PDFJSSCRIPT_REMOVE -->
<script type="text/javascript" src="../src/util.js"></script> <!-- PDFJSSCRIPT_REMOVE --> <script type="text/javascript" src="../src/util.js"></script> <!-- PDFJSSCRIPT_REMOVE -->
<script type="text/javascript" src="../src/canvas.js"></script> <!-- PDFJSSCRIPT_REMOVE --> <script type="text/javascript" src="../src/canvas.js"></script> <!-- PDFJSSCRIPT_REMOVE -->
@ -26,6 +26,8 @@
<script type="text/javascript" src="../src/stream.js"></script> <!-- PDFJSSCRIPT_REMOVE --> <script type="text/javascript" src="../src/stream.js"></script> <!-- PDFJSSCRIPT_REMOVE -->
<script type="text/javascript" src="../src/worker.js"></script> <!-- PDFJSSCRIPT_REMOVE --> <script type="text/javascript" src="../src/worker.js"></script> <!-- PDFJSSCRIPT_REMOVE -->
<script type="text/javascript">PDFJS.workerSrc = '../src/worker_loader.js';</script> <!-- PDFJSSCRIPT_REMOVE -->
<script type="text/javascript" src="viewer.js"></script> <script type="text/javascript" src="viewer.js"></script>
</head> </head>