Sakurai/pdf.js
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move find out of the Stream class

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This commit is contained in:
Andreas Gal 2011-05-09 23:32:22 -07:00
parent 056a81ee89
commit 0b5cdf651d
1 changed files with 19 additions and 18 deletions
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37
pdf.js
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@ -49,21 +49,6 @@ var Stream = (function() {
moveStart: function() { moveStart: function() {
this.start = this.pos; this.start = this.pos;
}, },
find: function(needle, limit, backwards) {
var length = this.bytes.length;
var pos = this.pos;
var str = "";
if (pos + limit > length)
limit = length - pos;
for (var n = 0; n < limit; ++n)
str += this.getChar();
this.pos = pos;
var index = backwards ? str.lastIndexOf(needle) : str.indexOf(needle);
if (index == -1)
return false; /* not found */
this.pos += index;
return true; /* found */
},
asString: function() { asString: function() {
var str = ""; var str = "";
var ch; var ch;
@ -1480,6 +1465,22 @@ var PDFDoc = (function() {
this.setup(); this.setup();
} }
function find(stream, needle, limit, backwards) {
var length = stream.length;
var pos = stream.pos;
var str = "";
if (pos + limit > length)
limit = length - pos;
for (var n = 0; n < limit; ++n)
str += stream.getChar();
stream.pos = pos;
var index = backwards ? str.lastIndexOf(needle) : str.indexOf(needle);
if (index == -1)
return false; /* not found */
stream.pos += index;
return true; /* found */
}
constructor.prototype = { constructor.prototype = {
get linearization() { get linearization() {
var length = this.stream.length; var length = this.stream.length;
@ -1499,7 +1500,7 @@ var PDFDoc = (function() {
if (linearization) { if (linearization) {
// Find end of first obj. // Find end of first obj.
stream.reset(); stream.reset();
if (stream.find("endobj", 1024)) if (find(stream, "endobj", 1024))
startXRef = stream.pos + 6; startXRef = stream.pos + 6;
} else { } else {
// Find startxref at the end of the file. // Find startxref at the end of the file.
@ -1507,7 +1508,7 @@ var PDFDoc = (function() {
if (start < 0) if (start < 0)
start = 0; start = 0;
stream.pos = start; stream.pos = start;
if (stream.find("startxref", 1024, true)) { if (find(stream, "startxref", 1024, true)) {
stream.skip(9); stream.skip(9);
var ch; var ch;
while (Lexer.isSpace(ch = stream.getChar())) while (Lexer.isSpace(ch = stream.getChar()))
@ -1538,7 +1539,7 @@ var PDFDoc = (function() {
checkHeader: function() { checkHeader: function() {
var stream = this.stream; var stream = this.stream;
stream.reset(); stream.reset();
if (stream.find("%PDF-", 1024)) { if (find(stream, "%PDF-", 1024)) {
// Found the header, trim off any garbage before it. // Found the header, trim off any garbage before it.
stream.moveStart(); stream.moveStart();
return; return;