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use ES5 Object operations for lazy properties

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This commit is contained in:
Andreas Gal 2011-05-02 17:20:08 -07:00
parent 07571b0bbf
commit 21c54da9d1
1 changed files with 28 additions and 7 deletions
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35
pdf.js
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@ -558,16 +558,37 @@ var PDFDoc = (function () {
this.setup(arrayBuffer);
}
function ShadowGetter(obj, name, value) {
Object.defineProperty(obj, name, {
value: value,
configurable: false,
writable: false,
enumerable: true
});
}
constructor.prototype = {
getLinearization: function() {
var linearization = this.linearization;
if (!linearization)
return this.linearization = new Linearization(this.stream);
get linearization() {
var length = this.stream.length;
var linearization = false;
if (length) {
linearization = new Linearization(this.stream);
if (linearization.length != length)
linearization = false;
}
ShadowGetter(this, "linearization", linearization);
return linearization;
},
isLinearized: function() {
var length = this.stream.length;
return length && this.getLinearization().length == length;
get startXRef() {
var startXRef;
var linearization = this.linearization;
if (linearization) {
// TODO
} else {
// TODO
}
ShadowGetter(this, "startXRef", startXRef);
return startXRef;
},
// Find the header, remove leading garbage and setup the stream
// starting from the header.