Sakurai/pdf.js
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

rewrote prototype inhertence

Browse Source
This commit is contained in:
sbarman 2011-06-21 21:48:50 -07:00
parent 99ffc9991e
commit 438c565f45
1 changed files with 318 additions and 332 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
pdf.js
View File

@ -345,8 +345,9 @@ var FlateStream = (function() {
DecodeStream.call(this); DecodeStream.call(this);
} }
constructor.prototype = { constructor.prototype = Object.create(DecodeStream.prototype);
getBits: function(bits) {
constructor.prototype.getBits = function(bits) {
var codeSize = this.codeSize; var codeSize = this.codeSize;
var codeBuf = this.codeBuf; var codeBuf = this.codeBuf;
var bytes = this.bytes; var bytes = this.bytes;
@ -364,8 +365,8 @@ var FlateStream = (function() {
this.codeSize = codeSize -= bits; this.codeSize = codeSize -= bits;
this.bytesPos = bytesPos; this.bytesPos = bytesPos;
return b; return b;
}, };
getCode: function(table) { constructor.prototype.getCode = function(table) {
var codes = table[0]; var codes = table[0];
var maxLen = table[1]; var maxLen = table[1];
var codeSize = this.codeSize; var codeSize = this.codeSize;
@ -389,8 +390,8 @@ var FlateStream = (function() {
this.codeSize = (codeSize - codeLen); this.codeSize = (codeSize - codeLen);
this.bytesPos = bytesPos; this.bytesPos = bytesPos;
return codeVal; return codeVal;
}, };
generateHuffmanTable: function(lengths) { constructor.prototype.generateHuffmanTable = function(lengths) {
var n = lengths.length; var n = lengths.length;
// find max code length // find max code length
@ -426,8 +427,8 @@ var FlateStream = (function() {
} }
return [codes, maxLen]; return [codes, maxLen];
}, };
readBlock: function() { constructor.prototype.readBlock = function() {
function repeat(stream, array, len, offset, what) { function repeat(stream, array, len, offset, what) {
var repeat = stream.getBits(len) + offset; var repeat = stream.getBits(len) + offset;
while (repeat-- > 0) while (repeat-- > 0)
@ -507,10 +508,10 @@ var FlateStream = (function() {
} }
} }
litCodeTable = this.generateHuffmanTable( litCodeTable =
codeLengths.slice(0, numLitCodes)); this.generateHuffmanTable(codeLengths.slice(0, numLitCodes));
distCodeTable = this.generateHuffmanTable( distCodeTable =
codeLengths.slice(numLitCodes, codes)); this.generateHuffmanTable(codeLengths.slice(numLitCodes, codes));
} else { } else {
error("Unknown block type in flate stream"); error("Unknown block type in flate stream");
} }
@ -543,16 +544,8 @@ var FlateStream = (function() {
buffer[pos] = buffer[pos - dist]; buffer[pos] = buffer[pos - dist];
} }
} }
}
}; };
var thisPrototype = constructor.prototype;
var superPrototype = DecodeStream.prototype;
for (var i in superPrototype) {
if (!thisPrototype[i])
thisPrototype[i] = superPrototype[i];
}
return constructor; return constructor;
})(); })();
@ -586,8 +579,9 @@ var PredictorStream = (function() {
DecodeStream.call(this); DecodeStream.call(this);
} }
constructor.prototype = { constructor.prototype = Object.create(DecodeStream.prototype);
readBlockTiff : function() {
constructor.prototype.readBlockTiff = function() {
var buffer = this.buffer; var buffer = this.buffer;
var pos = this.pos; var pos = this.pos;
@ -651,8 +645,8 @@ var PredictorStream = (function() {
} }
} }
this.bufferLength += rowBytes; this.bufferLength += rowBytes;
}, };
readBlockPng : function() { constructor.prototype.readBlockPng = function() {
var buffer = this.buffer; var buffer = this.buffer;
var pos = this.pos; var pos = this.pos;
@ -726,16 +720,8 @@ var PredictorStream = (function() {
break; break;
} }
this.bufferLength += rowBytes; this.bufferLength += rowBytes;
},
}; };
var thisPrototype = constructor.prototype;
var superPrototype = DecodeStream.prototype;
for (var i in superPrototype) {
if (!thisPrototype[i])
thisPrototype[i] = superPrototype[i];
}
return constructor; return constructor;
})(); })();