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| define(["require", "exports", "./pdf-primitives", "./utils", "./base-stream", "./predictor-stream", "./flate-stream", "./compression/jpeg-stream", "./compression/lempel-ziv-welch-stream", "./compression/jpx-stream", "./compression/ascii-85-stream", "./compression/ascii-hex-stream", "./compression/pdf-fax-stream", "./compression/run-length-stream", "./compression/jbig2-stream", "./security/encryptors/cipher-tranform"], function (require, exports, pdf_primitives_1, utils_1, base_stream_1, predictor_stream_1, flate_stream_1, jpeg_stream_1, lempel_ziv_welch_stream_1, jpx_stream_1, ascii_85_stream_1, ascii_hex_stream_1, pdf_fax_stream_1, run_length_stream_1, jbig2_stream_1, cipher_tranform_1) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var maxCacheLength = 1000;
var maxNumberLength = 5552;
var endOfFile = 'EOF';
var specialChars = [
1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 2, 0, 0, 2, 2, 0, 0, 0, 0, 0, 2,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
];
var _PdfLexicalOperator = (function () {
function _PdfLexicalOperator(stream, isFormDataFormat) {
Eif (isFormDataFormat === void 0) { isFormDataFormat = false; }
this.stream = stream;
this.nextChar();
this.stringBuffer = [];
this._hexStringNumber = 0;
this.beginInlineImagePosition = -1;
this._isFormsDataFormat = isFormDataFormat;
}
_PdfLexicalOperator.prototype.nextChar = function () {
return (this.currentChar = this.stream.getByte());
};
_PdfLexicalOperator.prototype.peekChar = function () {
return this.stream.peekByte();
};
_PdfLexicalOperator.prototype.getNumber = function () {
var ch = this.currentChar;
var eNotation = false;
var divideBy = 0;
var sign = 0;
if (ch === 0x2d) {
sign = -1;
ch = this.nextChar();
Iif (ch === 0x2d) {
ch = this.nextChar();
}
}
else Iif (ch === 0x2b) {
sign = 1;
ch = this.nextChar();
}
Iif (ch === 0x0a || ch === 0x0d) {
do {
ch = this.nextChar();
} while (ch === 0x0a || ch === 0x0d);
}
if (ch === 0x2e) {
divideBy = 10;
ch = this.nextChar();
}
Iif (ch < 0x30 || ch > 0x39) {
if (utils_1._isWhiteSpace(ch) || ch === -1) {
if (divideBy === 10 && sign === 0) {
return 0;
}
if (divideBy === 0 && sign === -1) {
return 0;
}
}
throw new utils_1.FormatError("Invalid number: " + String.fromCharCode(ch) + " (charCode " + ch + ")");
}
sign = sign || 1;
var baseValue = ch - 0x30;
var powerValue = 0;
var powerValueSign = 1;
ch = this.nextChar();
while (ch >= 0) {
if (ch >= 0x30 && ch <= 0x39) {
var currentDigit = ch - 0x30;
Iif (eNotation) {
powerValue = powerValue * 10 + currentDigit;
}
else {
if (divideBy !== 0) {
divideBy *= 10;
}
baseValue = baseValue * 10 + currentDigit;
}
}
else if (ch === 0x2e) {
Eif (divideBy === 0) {
divideBy = 1;
}
else {
break;
}
}
else Iif (ch === 0x2d) {
ch = this.nextChar();
continue;
}
else Iif (ch === 0x45 || ch === 0x65) {
ch = this.peekChar();
if (ch === 0x2b || ch === 0x2d) {
powerValueSign = ch === 0x2d ? -1 : 1;
this.nextChar();
}
else if (ch < 0x30 || ch > 0x39) {
break;
}
eNotation = true;
}
else {
break;
}
ch = this.nextChar();
}
if (divideBy !== 0) {
baseValue /= divideBy;
}
Iif (eNotation) {
baseValue *= Math.pow(10, (powerValueSign * powerValue));
}
return sign * baseValue;
};
_PdfLexicalOperator.prototype.getString = function () {
var numParen = 1;
var done = false;
var stringBuffer = this.stringBuffer;
stringBuffer.length = 0;
var ch = this.nextChar();
while (true) {
var charBuffered = false;
switch (ch | 0) {
case -1:
done = true;
break;
case 0x28:
++numParen;
stringBuffer.push('(');
break;
case 0x29:
Eif (--numParen === 0) {
this.nextChar();
done = true;
}
else {
stringBuffer.push(')');
}
break;
case 0x5c:
ch = this.nextChar();
switch (ch) {
case -1:
done = true;
break;
case 0x6e:
stringBuffer.push('\n');
break;
case 0x72:
stringBuffer.push('\r');
break;
case 0x74:
stringBuffer.push('\t');
break;
case 0x62:
stringBuffer.push('\b');
break;
case 0x66:
stringBuffer.push('\f');
break;
case 0x5c:
case 0x28:
case 0x29:
stringBuffer.push(String.fromCharCode(ch));
break;
case 0x30:
case 0x31:
case 0x32:
case 0x33:
case 0x34:
case 0x35:
case 0x36:
case 0x37:
var x = ch & 0x0f;
ch = this.nextChar();
charBuffered = true;
if (ch >= 0x30 && ch <= 0x37) {
x = (x << 3) + (ch & 0x0f);
ch = this.nextChar();
if (ch >= 0x30 && ch <= 0x37) {
charBuffered = false;
x = (x << 3) + (ch & 0x0f);
}
}
stringBuffer.push(String.fromCharCode(x));
break;
case 0x0d:
if (this.peekChar() === 0x0a) {
this.nextChar();
}
break;
case 0x0a:
break;
default:
stringBuffer.push(String.fromCharCode(ch));
break;
}
break;
default:
stringBuffer.push(String.fromCharCode(ch));
break;
}
if (done) {
break;
}
Eif (!charBuffered) {
ch = this.nextChar();
}
}
return stringBuffer.join('');
};
_PdfLexicalOperator.prototype.getName = function () {
var ch;
var previousCh;
var stringBuffer = this.stringBuffer;
stringBuffer.length = 0;
ch = this.nextChar();
while (ch >= 0 && !specialChars[ch]) {
Iif (ch === 0x23) {
ch = this.nextChar();
if (specialChars[ch]) {
stringBuffer.push('#');
break;
}
var x = this._toHexDigit(ch);
if (x !== -1) {
previousCh = ch;
ch = this.nextChar();
var x2 = this._toHexDigit(ch);
if (x2 === -1) {
stringBuffer.push('#', String.fromCharCode(previousCh));
if (specialChars[ch]) {
break;
}
stringBuffer.push(String.fromCharCode(ch));
ch = this.nextChar();
continue;
}
stringBuffer.push(String.fromCharCode((x << 4) | x2));
}
else {
stringBuffer.push('#', String.fromCharCode(ch));
}
}
else {
stringBuffer.push(String.fromCharCode(ch));
}
ch = this.nextChar();
}
return pdf_primitives_1._PdfName.get(stringBuffer.join(''));
};
_PdfLexicalOperator.prototype.getHexString = function () {
var stringBuffer = this.stringBuffer;
stringBuffer.length = 0;
var ch = this.currentChar;
var isFirstHex = true;
var firstDigit;
var secondDigit;
this._hexStringNumber = 0;
while (true) {
Iif (ch < 0) {
break;
}
else if (ch === 0x3e) {
this.nextChar();
break;
}
else Iif (specialChars[ch] === 1) {
ch = this.nextChar();
continue;
}
else {
if (isFirstHex) {
firstDigit = this._toHexDigit(ch);
Iif (firstDigit === -1) {
ch = this.nextChar();
continue;
}
}
else {
secondDigit = this._toHexDigit(ch);
Iif (secondDigit === -1) {
ch = this.nextChar();
continue;
}
stringBuffer.push(String.fromCharCode((firstDigit << 4) | secondDigit));
}
isFirstHex = !isFirstHex;
ch = this.nextChar();
}
}
return stringBuffer.join('');
};
_PdfLexicalOperator.prototype.getObject = function () {
var comment = false;
var ch = this.currentChar;
while (true) {
if (ch < 0) {
return endOfFile;
}
if (comment) {
if (ch === 0x0a || ch === 0x0d) {
comment = false;
}
}
else if (ch === 0x25) {
comment = true;
}
else if (specialChars[ch] !== 1) {
break;
}
ch = this.nextChar();
}
switch (ch | 0) {
case 0x30:
case 0x31:
case 0x32:
case 0x33:
case 0x34:
case 0x35:
case 0x36:
case 0x37:
case 0x38:
case 0x39:
case 0x2b:
case 0x2d:
case 0x2e:
return this.getNumber();
case 0x28:
return this.getString();
case 0x2f:
return this.getName();
case 0x5b:
this.nextChar();
return pdf_primitives_1._PdfCommand.get('[');
case 0x5d:
this.nextChar();
return pdf_primitives_1._PdfCommand.get(']');
case 0x3c:
ch = this.nextChar();
if (ch === 0x3c) {
this.nextChar();
return pdf_primitives_1._PdfCommand.get('<<');
}
return this.getHexString();
case 0x3e:
ch = this.nextChar();
Eif (ch === 0x3e) {
this.nextChar();
return pdf_primitives_1._PdfCommand.get('>>');
}
return pdf_primitives_1._PdfCommand.get('>');
case 0x7b:
this.nextChar();
return pdf_primitives_1._PdfCommand.get('{');
case 0x7d:
this.nextChar();
return pdf_primitives_1._PdfCommand.get('}');
case 0x29:
this.nextChar();
throw new utils_1.FormatError("Illegal character: " + ch);
}
var str = String.fromCharCode(ch);
Iif (ch < 0x20 || ch > 0x7f) {
var nextCh = this.peekChar();
if (nextCh >= 0x20 && nextCh <= 0x7f) {
this.nextChar();
return pdf_primitives_1._PdfCommand.get(str);
}
}
ch = this.nextChar();
while (ch >= 0 && !specialChars[ch]) {
var possibleCommand = str + String.fromCharCode(ch);
Iif (!this._isFormsDataFormat && str.length === 128) {
throw new utils_1.FormatError("Command token too long: " + str.length);
}
str = possibleCommand;
ch = this.nextChar();
}
if (str === 'true') {
return true;
}
if (str === 'false') {
return false;
}
Iif (str === 'null') {
return null;
}
Iif (str === 'BI') {
this.beginInlineImagePosition = this.stream.position;
}
return pdf_primitives_1._PdfCommand.get(str);
};
_PdfLexicalOperator.prototype.peekObj = function () {
var streamPos = this.stream.position;
var currentChar = this.currentChar;
var beginInlineImagePosition = this.beginInlineImagePosition;
var nextObj;
try {
nextObj = this.getObject();
}
catch (ex) { }
this.stream.position = streamPos;
this.currentChar = currentChar;
this.beginInlineImagePosition = beginInlineImagePosition;
return nextObj;
};
_PdfLexicalOperator.prototype.skipToNextLine = function () {
var ch = this.currentChar;
while (ch >= 0) {
Eif (ch === 0x0d) {
ch = this.nextChar();
Eif (ch === 0x0a) {
this.nextChar();
}
break;
}
else if (ch === 0x0a) {
this.nextChar();
break;
}
ch = this.nextChar();
}
};
_PdfLexicalOperator.prototype._toHexDigit = function (ch) {
if (ch >= 0x30 && ch <= 0x39) {
return ch & 0x0f;
}
Eif ((ch >= 0x41 && ch <= 0x46) || (ch >= 0x61 && ch <= 0x66)) {
return (ch & 0x0f) + 9;
}
return -1;
};
return _PdfLexicalOperator;
}());
exports._PdfLexicalOperator = _PdfLexicalOperator;
var _PdfParser = (function () {
function _PdfParser(lexicalOperator, xref, allowStreams, recoveryMode, encryptor) {
if (allowStreams === void 0) { allowStreams = false; }
if (recoveryMode === void 0) { recoveryMode = false; }
this._isColorSpace = false;
this._isPassword = false;
this._isImageExtraction = false;
this.lexicalOperator = lexicalOperator;
this.xref = xref;
this.allowStreams = allowStreams;
this.recoveryMode = recoveryMode;
this.imageCache = new Map();
this._encryptor = encryptor;
this.refill();
}
_PdfParser.prototype.refill = function () {
this.first = this.lexicalOperator.getObject();
this.second = this.lexicalOperator.getObject();
};
_PdfParser.prototype.shift = function () {
Iif (this.second instanceof pdf_primitives_1._PdfCommand && this.second.command === 'ID') {
this.first = this.second;
this.second = null;
}
else {
this.first = this.second;
this.second = this.lexicalOperator.getObject();
}
};
_PdfParser.prototype.tryShift = function () {
try {
this.shift();
return true;
}
catch (e) {
return false;
}
};
_PdfParser.prototype.getObject = function (arguement1, arguement2, arguement3) {
var cipherTransform;
var first = this.first;
this.shift();
if (first instanceof pdf_primitives_1._PdfCommand) {
switch (first.command) {
case 'BI':
if (typeof arguement1 === 'number' && typeof arguement2 === 'number') {
return this.makeInlineImage(arguement1, arguement2, arguement3);
}
else if (arguement1 instanceof cipher_tranform_1._CipherTransform) {
return this.makeInlineImage(arguement1);
}
else {
return this.makeInlineImage();
}
case '[':
var array = [];
while (!pdf_primitives_1._isCommand(this.first, ']') && this.first !== endOfFile) {
var entry = void 0;
Iif (typeof arguement1 === 'number' && typeof arguement2 === 'number') {
cipherTransform = this._encryptor._createCipherTransform(arguement1, arguement2);
entry = this.getObject(arguement1, arguement2, arguement3);
}
else Iif (arguement1 instanceof cipher_tranform_1._CipherTransform) {
cipherTransform = arguement1;
entry = this.getObject(arguement1);
}
else {
entry = this.getObject(arguement1);
}
Iif (array.length === 0 && pdf_primitives_1._isName(entry, 'Indexed')) {
this._isColorSpace = true;
}
entry = utils_1._decodeText(entry, this._isColorSpace, this._isPassword);
array.push(entry);
}
Iif (this.first === endOfFile) {
if (this.recoveryMode) {
return array;
}
throw new utils_1.ParserEndOfFileException('End of file inside array.');
}
this._isColorSpace = false;
this.shift();
return array;
case '<<':
var dictionary = new pdf_primitives_1._PdfDictionary(this.xref);
while (!pdf_primitives_1._isCommand(this.first, '>>') && this.first !== endOfFile) {
Iif (!(this.first instanceof pdf_primitives_1._PdfName)) {
this.shift();
continue;
}
var key = this.first.name;
if (key === 'U' || key === 'O' || key === 'ID') {
this._isPassword = true;
}
this.shift();
var isEnd = this._checkEnd();
Iif (isEnd || (pdf_primitives_1._isCommand(this.first, '>>') && pdf_primitives_1._isCommand(this.second, 'stream'))) {
break;
}
Iif (typeof arguement1 === 'number' && typeof arguement2 === 'number') {
cipherTransform = this._encryptor._createCipherTransform(arguement1, arguement2);
}
var value = void 0;
Iif (typeof arguement1 === 'number' && typeof arguement2 === 'number') {
value = this.getObject(arguement1, arguement2, arguement3);
}
else Iif (arguement1 instanceof cipher_tranform_1._CipherTransform) {
value = this.getObject(arguement1);
}
else {
value = this.getObject();
}
value = utils_1._decodeText(value, this._isColorSpace, this._isPassword);
if (value && value instanceof pdf_primitives_1._PdfName) {
var name_1 = value.name;
Iif (name_1.includes('#20')) {
value.name = name_1.replace(/#20/g, ' ');
}
}
this._isPassword = false;
dictionary.set(key, value);
}
Iif (this.first === endOfFile) {
if (this.recoveryMode) {
return dictionary;
}
throw new utils_1.ParserEndOfFileException('End of file inside dictionary.');
}
if (pdf_primitives_1._isCommand(this.second, 'stream')) {
Eif (this.allowStreams === true) {
Iif (arguement1 instanceof cipher_tranform_1._CipherTransform) {
cipherTransform = arguement1;
}
else Iif (arguement3 && typeof arguement2 === 'number') {
cipherTransform = this._encryptor._createCipherTransform(arguement1, arguement2);
}
Iif (typeof arguement2 === 'boolean' && arguement2) {
return this.makeStream(dictionary, cipherTransform, arguement2);
}
else {
return this.makeStream(dictionary, cipherTransform);
}
}
else {
return dictionary;
}
}
this.shift();
return dictionary;
default:
return first;
}
}
if (Number.isInteger(first)) {
if (Number.isInteger(this.first) && pdf_primitives_1._isCommand(this.second, 'R')) {
var ref = pdf_primitives_1._PdfReference.get(first, this.first);
this.shift();
this.shift();
return ref;
}
return first;
}
if (typeof first === 'string') {
Iif (arguement1 instanceof cipher_tranform_1._CipherTransform) {
cipherTransform = arguement1;
}
else Iif (typeof arguement1 === 'number' && typeof arguement2 === 'number') {
cipherTransform = this._encryptor._createCipherTransform(arguement1, arguement2);
}
Iif (cipherTransform) {
return cipherTransform.decryptString(first);
}
return first;
}
return first;
};
_PdfParser.prototype.findDiscreteDecodeInlineStreamEnd = function (stream) {
var startPos = stream.position;
var foundEnd = false;
var b;
var markerLength;
b = stream.getByte();
while (b !== -1) {
if (b !== 0xff) {
b = stream.getByte();
continue;
}
switch (stream.getByte()) {
case 0x00:
break;
case 0xff:
stream.skip(-1);
break;
case 0xd9:
foundEnd = true;
break;
case 0xc0:
case 0xc1:
case 0xc2:
case 0xc3:
case 0xc5:
case 0xc6:
case 0xc7:
case 0xc9:
case 0xca:
case 0xcb:
case 0xcd:
case 0xce:
case 0xcf:
case 0xc4:
case 0xcc:
case 0xda:
case 0xdb:
case 0xdc:
case 0xdd:
case 0xde:
case 0xdf:
case 0xe0:
case 0xe1:
case 0xe2:
case 0xe3:
case 0xe4:
case 0xe5:
case 0xe6:
case 0xe7:
case 0xe8:
case 0xe9:
case 0xea:
case 0xeb:
case 0xec:
case 0xed:
case 0xee:
case 0xef:
case 0xfe:
markerLength = stream.getUnsignedInteger16();
if (markerLength > 2) {
stream.skip(markerLength - 2);
}
else {
stream.skip(-2);
}
break;
}
if (foundEnd) {
break;
}
b = stream.getByte();
}
var length = stream.position - startPos;
if (b === -1) {
stream.skip(-length);
return this.findDefaultInlineStreamEnd(stream);
}
this.inlineStreamSkipEI(stream);
return length;
};
_PdfParser.prototype.findDecodeInlineStreamEnd = function (stream) {
var startPos = stream.position;
var ch;
while ((ch = stream.getByte()) !== -1) {
if (ch === 0x7e) {
var tildePos = stream.position;
ch = stream.peekByte();
while (utils_1._isWhiteSpace(ch)) {
stream.skip();
ch = stream.peekByte();
}
if (ch === 0x3e) {
stream.skip();
break;
}
if (stream.position > tildePos) {
var maybeEI = stream.peekBytes(2);
if (maybeEI[0] === 0x45 && maybeEI[1] === 0x49) {
break;
}
}
}
}
var length = stream.position - startPos;
if (ch === -1) {
stream.skip(-length);
return this.findDefaultInlineStreamEnd(stream);
}
this.inlineStreamSkipEI(stream);
return length;
};
_PdfParser.prototype.findHexDecodeInlineStreamEnd = function (stream) {
var startPos = stream.position;
var ch;
ch = stream.getByte();
while (ch !== -1) {
if (ch === 0x3e) {
break;
}
ch = stream.getByte();
}
var length = stream.position - startPos;
if (ch === -1) {
stream.skip(-length);
return this.findDefaultInlineStreamEnd(stream);
}
this.inlineStreamSkipEI(stream);
return length;
};
_PdfParser.prototype.inlineStreamSkipEI = function (stream) {
var state = 0;
var ch;
ch = stream.getByte();
while (ch !== -1) {
if (state === 0) {
state = ch === 0x45 ? 1 : 0;
}
else if (state === 1) {
state = ch === 0x49 ? 2 : 0;
}
else if (state === 2) {
break;
}
ch = stream.getByte();
}
};
_PdfParser.prototype.makeInlineImage = function (arguement1, arguement2, arguement3) {
var lexicalOperator = this.lexicalOperator;
var stream = lexicalOperator.stream;
var dictionary = new pdf_primitives_1._PdfDictionary(this.xref);
var dictLength;
var cipherTransform;
if (arguement3) {
if (arguement1 instanceof cipher_tranform_1._CipherTransform) {
cipherTransform = arguement1;
}
else {
cipherTransform = this._encryptor._createCipherTransform(arguement1, arguement2);
}
}
while (!pdf_primitives_1._isCommand(this.first, 'ID') && this.first !== endOfFile) {
if (!(this.first instanceof pdf_primitives_1._PdfName)) {
throw new utils_1.FormatError('Dictionary key must be a name object');
}
var key = this.first.name;
this.shift();
if (this.first.name === endOfFile) {
break;
}
if (arguement1 instanceof cipher_tranform_1._CipherTransform) {
dictionary.set(key, this.getObject(arguement1));
}
else {
dictionary.set(key, this.getObject(arguement1, arguement2, arguement3));
}
}
if (lexicalOperator.beginInlineImagePosition !== -1) {
dictLength = stream.position - lexicalOperator.beginInlineImagePosition;
}
var filter = dictionary.get('F', 'Filter');
var filterName;
if (filter instanceof pdf_primitives_1._PdfName) {
filterName = filter.name;
}
else if (Array.isArray(filter)) {
var reference = filter[0];
var filterZero = (reference !== null && typeof reference !== 'undefined' && reference instanceof pdf_primitives_1._PdfReference) ?
this.xref._fetch(reference) :
reference;
if (filterZero) {
filterName = filterZero.name;
}
}
var startPos = stream.position;
var length;
switch (filterName) {
case 'DCT':
case 'DCTDecode':
length = this.findDiscreteDecodeInlineStreamEnd(stream);
break;
case 'A85':
case 'ASCII85Decode':
length = this.findDecodeInlineStreamEnd(stream);
break;
case 'AHx':
case 'ASCIIHexDecode':
length = this.findHexDecodeInlineStreamEnd(stream);
break;
default:
length = this.findDefaultInlineStreamEnd(stream);
}
var imageStream = stream.makeSubStream(startPos, length, dictionary);
var cacheKey;
if (length < maxCacheLength && dictLength < maxNumberLength) {
var imageBytes = imageStream.getBytes();
imageStream.reset();
var initialStreamPos = stream.position;
stream.position = lexicalOperator.beginInlineImagePosition;
var dictBytes = stream.getBytes(dictLength);
stream.position = initialStreamPos;
cacheKey = this._computeMaxNumber(imageBytes) + '_' + this._computeMaxNumber(dictBytes);
var cacheEntry = this.imageCache.get(cacheKey);
if (cacheEntry !== undefined) {
this.second = pdf_primitives_1._PdfCommand.get('EI');
this.shift();
cacheEntry.reset();
return cacheEntry;
}
}
if (cipherTransform) {
imageStream = cipherTransform.createStream(imageStream, length);
}
imageStream = this.filter(imageStream, dictionary, length);
imageStream.dictionary = dictionary;
if (cacheKey !== undefined) {
this.imageCache.set(cacheKey, imageStream);
}
this.second = pdf_primitives_1._PdfCommand.get('EI');
this.shift();
return imageStream;
};
_PdfParser.prototype._computeMaxNumber = function (bytes) {
var bytesLength = bytes.length;
var a = 1;
var b = 0;
for (var i = 0; i < bytesLength; ++i) {
a += bytes[i] & 0xff;
b += a;
}
return (b % 65521 << 16) | a % 65521;
};
_PdfParser.prototype.makeStream = function (dictionary, cipherTransform, makeFilter) {
Eif (makeFilter === void 0) { makeFilter = false; }
var lexicalOperator = this.lexicalOperator;
var stream = lexicalOperator.stream;
lexicalOperator.skipToNextLine();
var startPosition = stream.position - 1;
var length = dictionary.get('Length');
Iif (!Number.isInteger(length)) {
length = 0;
}
stream.position = startPosition + length;
lexicalOperator.nextChar();
Eif (this.tryShift() && pdf_primitives_1._isCommand(this.second, 'endstream')) {
this.shift();
}
else {
var endStreamSignature = new Uint8Array([0x65, 0x6e, 0x64, 0x73, 0x74, 0x72, 0x65, 0x61, 0x6d]);
var actualLength = this._findStreamLength(startPosition, endStreamSignature);
if (actualLength < 0) {
var end = endStreamSignature.length - 1;
var truncatedSignature = endStreamSignature.slice(0, end);
var maybeLength = this._findStreamLength(startPosition, truncatedSignature);
if (maybeLength >= 0) {
var lastByte = stream.peekBytes(end + 1)[end];
if (utils_1._isWhiteSpace(lastByte)) {
actualLength = maybeLength;
}
}
if (actualLength < 0) {
throw new utils_1.FormatError('Missing endstream command.');
}
}
length = actualLength;
lexicalOperator.nextChar();
this.shift();
this.shift();
}
this.shift();
stream = stream.makeSubStream(startPosition, length, dictionary);
Eif (!makeFilter) {
Iif (cipherTransform) {
stream = cipherTransform.createStream(stream, length);
}
stream = this.filter(stream, dictionary, length);
}
stream.dictionary = dictionary;
return stream;
};
_PdfParser.prototype.filter = function (stream, dictionary, length) {
var _this = this;
var filter = dictionary.get('F', 'Filter');
var params = dictionary.get('DP', 'DecodeParms');
Eif (filter instanceof pdf_primitives_1._PdfName) {
return this.makeFilter(stream, filter.name, length, params);
}
else if (Array.isArray(filter)) {
var item = filter[0];
if (item instanceof pdf_primitives_1._PdfName) {
return this.makeFilter(stream, item.name, length, params);
}
else if (item instanceof pdf_primitives_1._PdfCommand) {
return this.makeFilter(stream, item.command, length, params);
}
}
var maybeLength = length;
if (Array.isArray(filter)) {
var filterArray = filter;
var paramsArray_1 = params;
filterArray.forEach(function (reference, i) {
filter = reference instanceof pdf_primitives_1._PdfReference ? _this.xref._fetch(reference) : reference;
if (!(filter instanceof pdf_primitives_1._PdfName) && !(filter instanceof pdf_primitives_1._PdfCommand)) {
throw new utils_1.FormatError("Bad filter name '" + filter + "'");
}
params = null;
if (Array.isArray(paramsArray_1) && i !== null && typeof i !== 'undefined' && i in paramsArray_1) {
var ref = paramsArray_1[i];
params = ref instanceof pdf_primitives_1._PdfReference ? _this.xref._fetch(ref) : ref;
}
if (filter instanceof pdf_primitives_1._PdfName) {
stream = _this.makeFilter(stream, filter.name, maybeLength, params);
}
else if (filter instanceof pdf_primitives_1._PdfCommand) {
stream = _this.makeFilter(stream, filter.command, maybeLength, params);
}
maybeLength = null;
});
}
return stream;
};
_PdfParser.prototype.makeFilter = function (stream, name, maybeLength, params) {
Iif (maybeLength === 0) {
return new base_stream_1._PdfNullStream();
}
var earlyChange = 1;
try {
Eif (name === 'Fl' || name === 'FlateDecode') {
Iif (params) {
return new predictor_stream_1.PdfPredictorStream(new flate_stream_1._PdfFlateStream(stream, maybeLength), maybeLength, params);
}
return new flate_stream_1._PdfFlateStream(stream, maybeLength);
}
else if (this._isImageExtraction) {
switch (name) {
case 'LZW':
case 'LZWDecode':
if (params) {
if (params.has('EarlyChange')) {
earlyChange = params.get('EarlyChange');
}
return new predictor_stream_1.PdfPredictorStream(new lempel_ziv_welch_stream_1._PdfLempelZivWelchStream(stream, maybeLength, earlyChange), maybeLength, params);
}
return new lempel_ziv_welch_stream_1._PdfLempelZivWelchStream(stream, maybeLength, earlyChange);
case 'DCT':
case 'DCTDecode':
return new jpeg_stream_1._PdfJpegStream(stream, maybeLength, params);
case 'JPX':
case 'JPXDecode':
return new jpx_stream_1._PdfJpxStream(stream, maybeLength, params);
case 'A85':
case 'ASCII85Decode':
return new ascii_85_stream_1._PdfAscii85Stream(stream, maybeLength);
case 'AHx':
case 'ASCIIHexDecode':
return new ascii_hex_stream_1._PdfAsciiHexStream(stream, maybeLength);
case 'CCF':
case 'CCITTFaxDecode':
return new pdf_fax_stream_1._PdfFaxStream(stream, maybeLength, params);
case 'RL':
case 'RunLengthDecode':
return new run_length_stream_1._PdfRunLengthStream(stream, maybeLength);
case 'JBIG2Decode':
return new jbig2_stream_1._PdfJbig2Stream(stream, maybeLength, params);
default:
return stream;
}
}
else {
return stream;
}
}
catch (ex) {
return new base_stream_1._PdfNullStream();
}
};
_PdfParser.prototype._findStreamLength = function (startPosition, signature) {
var stream = this.lexicalOperator.stream;
stream.position = startPosition;
var length = 2048;
var signatureLength = signature.length;
while (stream.position < stream.end) {
var scanBytes = stream.peekBytes(length);
var scanLength = scanBytes.length - signatureLength;
if (scanLength <= 0) {
break;
}
var position = 0;
while (position < scanLength) {
var j = 0;
while (j < signatureLength && scanBytes[position + j] === signature[j]) {
j++;
}
if (j >= signatureLength) {
stream.position += position;
return stream.position - startPosition;
}
position++;
}
stream.position += scanLength;
}
return -1;
};
_PdfParser.prototype.findDefaultInlineStreamEnd = function (stream) {
var startPosition = stream.position;
var n = 10;
var state = 0;
var ch;
var endImagePosition;
ch = stream.getByte();
while (ch !== -1) {
if (state === 0) {
state = ch === 0x45 ? 1 : 0;
}
else if (state === 1) {
state = ch === 0x49 ? 2 : 0;
}
else {
if (state !== 2) {
throw new Error('findDefaultInlineStreamEnd - invalid state.');
}
if (ch === 0x20 || ch === 0xa || ch === 0xd) {
endImagePosition = stream.position;
var followingBytes = stream.peekBytes(n);
for (var i = 0, ii = followingBytes.length; i < ii; i++) {
ch = followingBytes[i];
if (ch === 0x0 && followingBytes[i + 1] !== 0x0) {
continue;
}
if (ch !== 0xa && ch !== 0xd && (ch < 0x20 || ch > 0x7f)) {
state = 0;
break;
}
}
if (state !== 2) {
ch = stream.getByte();
continue;
}
if (state === 2) {
break;
}
}
else {
state = 0;
}
}
ch = stream.getByte();
}
if (ch === -1) {
if (typeof endImagePosition !== 'undefined') {
stream.skip(-(stream.position - endImagePosition));
}
}
var endOffset = 4;
stream.skip(-endOffset);
ch = stream.peekByte();
stream.skip(endOffset);
if (!utils_1._isWhiteSpace(ch)) {
endOffset--;
}
return stream.position - endOffset - startPosition;
};
_PdfParser.prototype._checkEnd = function () {
Iif (this.first === endOfFile) {
return true;
}
else {
return false;
}
};
return _PdfParser;
}());
exports._PdfParser = _PdfParser;
var _Linearization = (function () {
function _Linearization(stream) {
this.isValid = false;
var parser = new _PdfParser(new _PdfLexicalOperator(stream), null);
var obj1 = parser.getObject();
var obj2 = parser.getObject();
var obj3 = parser.getObject();
var dictionary = parser.getObject();
this.isValid = Number.isInteger(obj1) && Number.isInteger(obj2) && pdf_primitives_1._isCommand(obj3, 'obj') && typeof dictionary !== 'undefined';
Eif (this.isValid) {
var obj = dictionary.get('Linearized');
this.isValid = typeof obj !== 'undefined' && obj > 0;
}
Iif (this.isValid) {
var length_1 = this.getInt(dictionary, 'L');
if (length_1 !== stream.length) {
throw new Error('The L parameter in the linearization dictionary ' + 'does not equal the stream length.');
}
this.length = length_1;
this.hints = this.getHints(dictionary);
this.objectNumberFirst = this.getInt(dictionary, 'O');
this.endFirst = this.getInt(dictionary, 'E');
this.pageCount = this.getInt(dictionary, 'N');
this.mainXRefEntriesOffset = this.getInt(dictionary, 'T');
this.pageFirst = dictionary.has('P') ? this.getInt(dictionary, 'P', true) : 0;
}
}
_Linearization.prototype.getInt = function (dictionary, name, allowZeroValue) {
if (allowZeroValue === void 0) { allowZeroValue = false; }
var obj = dictionary.get(name);
if (typeof obj !== 'undefined' && Number.isInteger(obj) && (allowZeroValue ? obj >= 0 : obj > 0)) {
return obj;
}
throw new Error("The '" + name + "' parameter in the linearization " + 'dictionary is invalid.');
};
_Linearization.prototype.getHints = function (dictionary) {
var hints = dictionary.getArray('H');
var hintsLength = hints.length;
if (hints && (hintsLength === 2 || hintsLength === 4)) {
for (var index = 0; index < hintsLength; index++) {
var hint = hints[index];
if (!(Number.isInteger(hint) && hint > 0)) {
throw new Error("Hint (" + index + ") in the linearization dictionary is invalid.");
}
}
return hints;
}
throw new Error('Hint array in the linearization dictionary is invalid.');
};
return _Linearization;
}());
exports._Linearization = _Linearization;
});
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