Sakurai/pdf.js
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add PDFDoc

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This commit is contained in:
Andreas Gal 2011-05-02 15:34:59 -07:00
parent 9334143941
commit 07571b0bbf
1 changed files with 41 additions and 36 deletions
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77
pdf.js
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@ -553,42 +553,47 @@ var Linearization = (function () {
}; };
})(); })();
var linearization; var PDFDoc = (function () {
function getLinearization() { function constructor(arrayBuffer) {
if (linearization) this.setup(arrayBuffer);
return linearization;
return linearization = new Linearization(stream);
}
function isLinearized() {
return stream.length && getLinearization().length == stream.length;
}
var stream;
// Find the header, remove leading garbage and setup the stream
// starting from the header.
function checkHeader(arrayBuffer) {
const headerSearchSize = 1024;
stream = new Uint8Array(arrayBuffer);
var skip = 0;
var header = "%PDF-";
while (skip < headerSearchSize) {
for (var i = 0; i < header.length; ++i)
if (stream[skip+i] != header.charCodeAt(i))
break;
// Found the header, trim off any garbage before it.
if (i == header.length) {
stream = new Uint8Array(arrayBuffer, skip);
return;
}
} }
// May not be a PDF file, continue anyway. constructor.prototype = {
} getLinearization: function() {
var linearization = this.linearization;
if (!linearization)
return this.linearization = new Linearization(this.stream);
return linearization;
},
isLinearized: function() {
var length = this.stream.length;
return length && this.getLinearization().length == length;
},
// Find the header, remove leading garbage and setup the stream
// starting from the header.
checkHeader: function(arrayBuffer) {
const headerSearchSize = 1024;
function setup(arrayBuffer, ownerPassword, userPassword) { var stream = new Uint8Array(arrayBuffer);
var ub = checkHeader(arrayBuffer); var skip = 0;
} var header = "%PDF-";
while (skip < headerSearchSize) {
for (var i = 0; i < header.length; ++i)
if (this.stream[skip+i] != header.charCodeAt(i))
break;
// Found the header, trim off any garbage before it.
if (i == header.length) {
this.stream = new Uint8Array(arrayBuffer, skip);
return;
}
}
// May not be a PDF file, continue anyway.
this.stream = stream;
},
setup: function(arrayBuffer, ownerPassword, userPassword) {
this.checkHeader(arrayBuffer);
}
};
})();