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Very basic worker implementation

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This commit is contained in:
Julian Viereck 2011-09-05 16:07:03 -07:00
parent 2c51c6fb9e
commit 0a571899c8
3 changed files with 69 additions and 1 deletions
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1
web/viewer.html
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@ -11,6 +11,7 @@
<script type="text/javascript" src="../crypto.js"></script>
<script type="text/javascript" src="../glyphlist.js"></script>
<script type="text/javascript" src="../metrics.js"></script>
<script type="text/javascript" src="../worker.js"></script>
</head>
<body>

2
web/viewer.js
View File

@ -152,7 +152,7 @@ var PDFView = {
while (container.hasChildNodes())
container.removeChild(container.lastChild);
var pdf = new PDFDoc(new Stream(data));
var pdf = new WorkerPDFDoc(data);
var pagesCount = pdf.numPages;
document.getElementById('numPages').innerHTML = pagesCount;

67
worker.js Normal file
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@ -0,0 +1,67 @@
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
'use strict';
var WorkerPage = (function() {
function constructor(workerPDF, page) {
this.workerPDF = workerPDF;
this.page = page;
this.ref = page.ref;
}
constructor.prototype = {
get width() {
return this.page.width;
},
get height() {
return this.page.height;
},
get stats() {
return this.page.stats;
},
startRendering: function(ctx, callback, errback) {
// TODO: Place the worker magic HERE.
this.page.startRendering(ctx, callback, errback);
},
getLinks: function() {
return this.page.getLinks();
}
};
return constructor;
})();
var WorkerPDFDoc = (function() {
function constructor(data) {
this.data = data;
this.stream = new Stream(data);
this.pdf = new PDFDoc(this.stream);
this.catalog = this.pdf.catalog;
this.pageCache = [];
}
constructor.prototype = {
get numPages() {
return this.pdf.numPages;
},
getPage: function(n) {
if (this.pageCache[n]) {
return this.pageCache[n];
}
var page = this.pdf.getPage(n);
return this.pageCache[n] = new WorkerPage(this, page);
}
};
return constructor;
})();