Merge pull request #10635 from timvandermeij/lexer-parser
Convert `src/core/parser.js` to ES6 syntax and write more unit tests for the lexer and the parser
This commit is contained in:
Tim van der Meij
GitHub
commit
33bfbef6ba
@ -12,6 +12,7 @@
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
/* eslint no-var: error */
|
||||
|
||||
import {
|
||||
Ascii85Stream, AsciiHexStream, FlateStream, LZWStream, NullStream,
|
||||
@ -34,7 +35,7 @@ const MAX_LENGTH_TO_CACHE = 1000;
|
||||
const MAX_ADLER32_LENGTH = 5552;
|
||||
|
||||
function computeAdler32(bytes) {
|
||||
let bytesLength = bytes.length;
|
||||
const bytesLength = bytes.length;
|
||||
if (typeof PDFJSDev === 'undefined' ||
|
||||
PDFJSDev.test('!PRODUCTION || TESTING')) {
|
||||
assert(bytesLength < MAX_ADLER32_LENGTH,
|
||||
@ -49,22 +50,23 @@ function computeAdler32(bytes) {
|
||||
return ((b % 65521) << 16) | (a % 65521);
|
||||
}
|
||||
|
||||
var Parser = (function ParserClosure() {
|
||||
function Parser(lexer, allowStreams, xref, recoveryMode) {
|
||||
class Parser {
|
||||
constructor(lexer, allowStreams, xref, recoveryMode = false) {
|
||||
this.lexer = lexer;
|
||||
this.allowStreams = allowStreams;
|
||||
this.xref = xref;
|
||||
this.recoveryMode = recoveryMode || false;
|
||||
this.recoveryMode = recoveryMode;
|
||||
|
||||
this.imageCache = Object.create(null);
|
||||
this.refill();
|
||||
}
|
||||
|
||||
Parser.prototype = {
|
||||
refill: function Parser_refill() {
|
||||
refill() {
|
||||
this.buf1 = this.lexer.getObj();
|
||||
this.buf2 = this.lexer.getObj();
|
||||
},
|
||||
shift: function Parser_shift() {
|
||||
}
|
||||
|
||||
shift() {
|
||||
if (isCmd(this.buf2, 'ID')) {
|
||||
this.buf1 = this.buf2;
|
||||
this.buf2 = null;
|
||||
@ -72,8 +74,9 @@ var Parser = (function ParserClosure() {
|
||||
this.buf1 = this.buf2;
|
||||
this.buf2 = this.lexer.getObj();
|
||||
}
|
||||
},
|
||||
tryShift: function Parser_tryShift() {
|
||||
}
|
||||
|
||||
tryShift() {
|
||||
try {
|
||||
this.shift();
|
||||
return true;
|
||||
@ -85,9 +88,10 @@ var Parser = (function ParserClosure() {
|
||||
// state and call this.shift() twice to reset the buffers.
|
||||
return false;
|
||||
}
|
||||
},
|
||||
getObj: function Parser_getObj(cipherTransform) {
|
||||
var buf1 = this.buf1;
|
||||
}
|
||||
|
||||
getObj(cipherTransform) {
|
||||
const buf1 = this.buf1;
|
||||
this.shift();
|
||||
|
||||
if (buf1 instanceof Cmd) {
|
||||
@ -95,7 +99,7 @@ var Parser = (function ParserClosure() {
|
||||
case 'BI': // inline image
|
||||
return this.makeInlineImage(cipherTransform);
|
||||
case '[': // array
|
||||
var array = [];
|
||||
const array = [];
|
||||
while (!isCmd(this.buf1, ']') && !isEOF(this.buf1)) {
|
||||
array.push(this.getObj(cipherTransform));
|
||||
}
|
||||
@ -108,7 +112,7 @@ var Parser = (function ParserClosure() {
|
||||
this.shift();
|
||||
return array;
|
||||
case '<<': // dictionary or stream
|
||||
var dict = new Dict(this.xref);
|
||||
const dict = new Dict(this.xref);
|
||||
while (!isCmd(this.buf1, '>>') && !isEOF(this.buf1)) {
|
||||
if (!isName(this.buf1)) {
|
||||
info('Malformed dictionary: key must be a name object');
|
||||
@ -116,7 +120,7 @@ var Parser = (function ParserClosure() {
|
||||
continue;
|
||||
}
|
||||
|
||||
var key = this.buf1.name;
|
||||
const key = this.buf1.name;
|
||||
this.shift();
|
||||
if (isEOF(this.buf1)) {
|
||||
break;
|
||||
@ -144,9 +148,9 @@ var Parser = (function ParserClosure() {
|
||||
}
|
||||
|
||||
if (Number.isInteger(buf1)) { // indirect reference or integer
|
||||
var num = buf1;
|
||||
const num = buf1;
|
||||
if (Number.isInteger(this.buf1) && isCmd(this.buf2, 'R')) {
|
||||
var ref = new Ref(num, this.buf1);
|
||||
const ref = new Ref(num, this.buf1);
|
||||
this.shift();
|
||||
this.shift();
|
||||
return ref;
|
||||
@ -155,7 +159,7 @@ var Parser = (function ParserClosure() {
|
||||
}
|
||||
|
||||
if (isString(buf1)) { // string
|
||||
var str = buf1;
|
||||
let str = buf1;
|
||||
if (cipherTransform) {
|
||||
str = cipherTransform.decryptString(str);
|
||||
}
|
||||
@ -164,7 +168,8 @@ var Parser = (function ParserClosure() {
|
||||
|
||||
// simple object
|
||||
return buf1;
|
||||
},
|
||||
}
|
||||
|
||||
/**
|
||||
* Find the end of the stream by searching for the /EI\s/.
|
||||
* @returns {number} The inline stream length.
|
||||
@ -183,7 +188,7 @@ var Parser = (function ParserClosure() {
|
||||
if (ch === SPACE || ch === LF || ch === CR) {
|
||||
maybeEIPos = stream.pos;
|
||||
// Let's check that the next `n` bytes are ASCII... just to be sure.
|
||||
let followingBytes = stream.peekBytes(n);
|
||||
const followingBytes = stream.peekBytes(n);
|
||||
for (let i = 0, ii = followingBytes.length; i < ii; i++) {
|
||||
ch = followingBytes[i];
|
||||
if (ch === NUL && followingBytes[i + 1] !== NUL) {
|
||||
@ -235,14 +240,14 @@ var Parser = (function ParserClosure() {
|
||||
endOffset--;
|
||||
}
|
||||
return ((stream.pos - endOffset) - startPos);
|
||||
},
|
||||
}
|
||||
|
||||
/**
|
||||
* Find the EOI (end-of-image) marker 0xFFD9 of the stream.
|
||||
* @returns {number} The inline stream length.
|
||||
*/
|
||||
findDCTDecodeInlineStreamEnd:
|
||||
function Parser_findDCTDecodeInlineStreamEnd(stream) {
|
||||
var startPos = stream.pos, foundEOI = false, b, markerLength, length;
|
||||
findDCTDecodeInlineStreamEnd(stream) {
|
||||
let startPos = stream.pos, foundEOI = false, b, markerLength, length;
|
||||
while ((b = stream.getByte()) !== -1) {
|
||||
if (b !== 0xFF) { // Not a valid marker.
|
||||
continue;
|
||||
@ -331,14 +336,15 @@ var Parser = (function ParserClosure() {
|
||||
}
|
||||
this.inlineStreamSkipEI(stream);
|
||||
return length;
|
||||
},
|
||||
}
|
||||
|
||||
/**
|
||||
* Find the EOD (end-of-data) marker '~>' (i.e. TILDE + GT) of the stream.
|
||||
* @returns {number} The inline stream length.
|
||||
*/
|
||||
findASCII85DecodeInlineStreamEnd(stream) {
|
||||
var TILDE = 0x7E, GT = 0x3E;
|
||||
var startPos = stream.pos, ch, length;
|
||||
const TILDE = 0x7E, GT = 0x3E;
|
||||
let startPos = stream.pos, ch, length;
|
||||
while ((ch = stream.getByte()) !== -1) {
|
||||
if (ch === TILDE) {
|
||||
ch = stream.peekByte();
|
||||
@ -363,15 +369,15 @@ var Parser = (function ParserClosure() {
|
||||
}
|
||||
this.inlineStreamSkipEI(stream);
|
||||
return length;
|
||||
},
|
||||
}
|
||||
|
||||
/**
|
||||
* Find the EOD (end-of-data) marker '>' (i.e. GT) of the stream.
|
||||
* @returns {number} The inline stream length.
|
||||
*/
|
||||
findASCIIHexDecodeInlineStreamEnd:
|
||||
function Parser_findASCIIHexDecodeInlineStreamEnd(stream) {
|
||||
var GT = 0x3E;
|
||||
var startPos = stream.pos, ch, length;
|
||||
findASCIIHexDecodeInlineStreamEnd(stream) {
|
||||
const GT = 0x3E;
|
||||
let startPos = stream.pos, ch, length;
|
||||
while ((ch = stream.getByte()) !== -1) {
|
||||
if (ch === GT) {
|
||||
break;
|
||||
@ -386,13 +392,14 @@ var Parser = (function ParserClosure() {
|
||||
}
|
||||
this.inlineStreamSkipEI(stream);
|
||||
return length;
|
||||
},
|
||||
}
|
||||
|
||||
/**
|
||||
* Skip over the /EI/ for streams where we search for an EOD marker.
|
||||
*/
|
||||
inlineStreamSkipEI: function Parser_inlineStreamSkipEI(stream) {
|
||||
var E = 0x45, I = 0x49;
|
||||
var state = 0, ch;
|
||||
inlineStreamSkipEI(stream) {
|
||||
const E = 0x45, I = 0x49;
|
||||
let state = 0, ch;
|
||||
while ((ch = stream.getByte()) !== -1) {
|
||||
if (state === 0) {
|
||||
state = (ch === E) ? 1 : 0;
|
||||
@ -402,18 +409,20 @@ var Parser = (function ParserClosure() {
|
||||
break;
|
||||
}
|
||||
}
|
||||
},
|
||||
makeInlineImage: function Parser_makeInlineImage(cipherTransform) {
|
||||
var lexer = this.lexer;
|
||||
var stream = lexer.stream;
|
||||
}
|
||||
|
||||
makeInlineImage(cipherTransform) {
|
||||
const lexer = this.lexer;
|
||||
const stream = lexer.stream;
|
||||
|
||||
// Parse dictionary.
|
||||
let dict = new Dict(this.xref), dictLength;
|
||||
const dict = new Dict(this.xref);
|
||||
let dictLength;
|
||||
while (!isCmd(this.buf1, 'ID') && !isEOF(this.buf1)) {
|
||||
if (!isName(this.buf1)) {
|
||||
throw new FormatError('Dictionary key must be a name object');
|
||||
}
|
||||
var key = this.buf1.name;
|
||||
const key = this.buf1.name;
|
||||
this.shift();
|
||||
if (isEOF(this.buf1)) {
|
||||
break;
|
||||
@ -425,18 +434,20 @@ var Parser = (function ParserClosure() {
|
||||
}
|
||||
|
||||
// Extract the name of the first (i.e. the current) image filter.
|
||||
var filter = dict.get('Filter', 'F'), filterName;
|
||||
const filter = dict.get('Filter', 'F');
|
||||
let filterName;
|
||||
if (isName(filter)) {
|
||||
filterName = filter.name;
|
||||
} else if (Array.isArray(filter)) {
|
||||
var filterZero = this.xref.fetchIfRef(filter[0]);
|
||||
const filterZero = this.xref.fetchIfRef(filter[0]);
|
||||
if (isName(filterZero)) {
|
||||
filterName = filterZero.name;
|
||||
}
|
||||
}
|
||||
|
||||
// Parse image stream.
|
||||
let startPos = stream.pos, length;
|
||||
const startPos = stream.pos;
|
||||
let length;
|
||||
if (filterName === 'DCTDecode' || filterName === 'DCT') {
|
||||
length = this.findDCTDecodeInlineStreamEnd(stream);
|
||||
} else if (filterName === 'ASCII85Decode' || filterName === 'A85') {
|
||||
@ -446,26 +457,26 @@ var Parser = (function ParserClosure() {
|
||||
} else {
|
||||
length = this.findDefaultInlineStreamEnd(stream);
|
||||
}
|
||||
var imageStream = stream.makeSubStream(startPos, length, dict);
|
||||
let imageStream = stream.makeSubStream(startPos, length, dict);
|
||||
|
||||
// Cache all images below the MAX_LENGTH_TO_CACHE threshold by their
|
||||
// adler32 checksum.
|
||||
let cacheKey;
|
||||
if (length < MAX_LENGTH_TO_CACHE && dictLength < MAX_ADLER32_LENGTH) {
|
||||
var imageBytes = imageStream.getBytes();
|
||||
const imageBytes = imageStream.getBytes();
|
||||
imageStream.reset();
|
||||
|
||||
const initialStreamPos = stream.pos;
|
||||
// Set the stream position to the beginning of the dictionary data...
|
||||
stream.pos = lexer.beginInlineImagePos;
|
||||
// ... and fetch the bytes of the *entire* dictionary.
|
||||
let dictBytes = stream.getBytes(dictLength);
|
||||
const dictBytes = stream.getBytes(dictLength);
|
||||
// Finally, don't forget to reset the stream position.
|
||||
stream.pos = initialStreamPos;
|
||||
|
||||
cacheKey = computeAdler32(imageBytes) + '_' + computeAdler32(dictBytes);
|
||||
|
||||
let cacheEntry = this.imageCache[cacheKey];
|
||||
const cacheEntry = this.imageCache[cacheKey];
|
||||
if (cacheEntry !== undefined) {
|
||||
this.buf2 = Cmd.get('EI');
|
||||
this.shift();
|
||||
@ -482,7 +493,7 @@ var Parser = (function ParserClosure() {
|
||||
imageStream = this.filter(imageStream, dict, length);
|
||||
imageStream.dict = dict;
|
||||
if (cacheKey !== undefined) {
|
||||
imageStream.cacheKey = 'inline_' + length + '_' + cacheKey;
|
||||
imageStream.cacheKey = `inline_${length}_${cacheKey}`;
|
||||
this.imageCache[cacheKey] = imageStream;
|
||||
}
|
||||
|
||||
@ -490,7 +501,7 @@ var Parser = (function ParserClosure() {
|
||||
this.shift();
|
||||
|
||||
return imageStream;
|
||||
},
|
||||
}
|
||||
|
||||
_findStreamLength(startPos, signature) {
|
||||
const { stream, } = this.lexer;
|
||||
@ -521,28 +532,28 @@ var Parser = (function ParserClosure() {
|
||||
stream.pos += scanLength;
|
||||
}
|
||||
return -1;
|
||||
},
|
||||
}
|
||||
|
||||
makeStream: function Parser_makeStream(dict, cipherTransform) {
|
||||
var lexer = this.lexer;
|
||||
var stream = lexer.stream;
|
||||
makeStream(dict, cipherTransform) {
|
||||
const lexer = this.lexer;
|
||||
let stream = lexer.stream;
|
||||
|
||||
// get stream start position
|
||||
// Get the stream's start position.
|
||||
lexer.skipToNextLine();
|
||||
const startPos = stream.pos - 1;
|
||||
|
||||
// get length
|
||||
var length = dict.get('Length');
|
||||
// Get the length.
|
||||
let length = dict.get('Length');
|
||||
if (!Number.isInteger(length)) {
|
||||
info('Bad ' + length + ' attribute in stream');
|
||||
info(`Bad length "${length}" in stream`);
|
||||
length = 0;
|
||||
}
|
||||
|
||||
// skip over the stream data
|
||||
// Skip over the stream data.
|
||||
stream.pos = startPos + length;
|
||||
lexer.nextChar();
|
||||
|
||||
// Shift '>>' and check whether the new object marks the end of the stream
|
||||
// Shift '>>' and check whether the new object marks the end of the stream.
|
||||
if (this.tryShift() && isCmd(this.buf2, 'endstream')) {
|
||||
this.shift(); // 'stream'
|
||||
} else {
|
||||
@ -561,7 +572,7 @@ var Parser = (function ParserClosure() {
|
||||
const end = ENDSTREAM_SIGNATURE.length - i;
|
||||
const TRUNCATED_SIGNATURE = ENDSTREAM_SIGNATURE.slice(0, end);
|
||||
|
||||
let maybeLength = this._findStreamLength(startPos,
|
||||
const maybeLength = this._findStreamLength(startPos,
|
||||
TRUNCATED_SIGNATURE);
|
||||
if (maybeLength >= 0) {
|
||||
// Ensure that the byte immediately following the truncated
|
||||
@ -596,10 +607,12 @@ var Parser = (function ParserClosure() {
|
||||
stream = this.filter(stream, dict, length);
|
||||
stream.dict = dict;
|
||||
return stream;
|
||||
},
|
||||
filter: function Parser_filter(stream, dict, length) {
|
||||
var filter = dict.get('Filter', 'F');
|
||||
var params = dict.get('DecodeParms', 'DP');
|
||||
}
|
||||
|
||||
filter(stream, dict, length) {
|
||||
let filter = dict.get('Filter', 'F');
|
||||
let params = dict.get('DecodeParms', 'DP');
|
||||
|
||||
if (isName(filter)) {
|
||||
if (Array.isArray(params)) {
|
||||
warn('/DecodeParms should not contain an Array, ' +
|
||||
@ -608,14 +621,14 @@ var Parser = (function ParserClosure() {
|
||||
return this.makeFilter(stream, filter.name, length, params);
|
||||
}
|
||||
|
||||
var maybeLength = length;
|
||||
let maybeLength = length;
|
||||
if (Array.isArray(filter)) {
|
||||
var filterArray = filter;
|
||||
var paramsArray = params;
|
||||
for (var i = 0, ii = filterArray.length; i < ii; ++i) {
|
||||
let filterArray = filter;
|
||||
let paramsArray = params;
|
||||
for (let i = 0, ii = filterArray.length; i < ii; ++i) {
|
||||
filter = this.xref.fetchIfRef(filterArray[i]);
|
||||
if (!isName(filter)) {
|
||||
throw new FormatError('Bad filter name: ' + filter);
|
||||
throw new FormatError(`Bad filter name "${filter}"`);
|
||||
}
|
||||
|
||||
params = null;
|
||||
@ -623,22 +636,24 @@ var Parser = (function ParserClosure() {
|
||||
params = this.xref.fetchIfRef(paramsArray[i]);
|
||||
}
|
||||
stream = this.makeFilter(stream, filter.name, maybeLength, params);
|
||||
// after the first stream the length variable is invalid
|
||||
// After the first stream the `length` variable is invalid.
|
||||
maybeLength = null;
|
||||
}
|
||||
}
|
||||
return stream;
|
||||
},
|
||||
makeFilter: function Parser_makeFilter(stream, name, maybeLength, params) {
|
||||
}
|
||||
|
||||
makeFilter(stream, name, maybeLength, params) {
|
||||
// Since the 'Length' entry in the stream dictionary can be completely
|
||||
// wrong, e.g. zero for non-empty streams, only skip parsing the stream
|
||||
// when we can be absolutely certain that it actually is empty.
|
||||
if (maybeLength === 0) {
|
||||
warn('Empty "' + name + '" stream.');
|
||||
warn(`Empty "${name}" stream.`);
|
||||
return new NullStream();
|
||||
}
|
||||
|
||||
try {
|
||||
var xrefStreamStats = this.xref.stats.streamTypes;
|
||||
const xrefStreamStats = this.xref.stats.streamTypes;
|
||||
if (name === 'FlateDecode' || name === 'Fl') {
|
||||
xrefStreamStats[StreamType.FLATE] = true;
|
||||
if (params) {
|
||||
@ -649,7 +664,7 @@ var Parser = (function ParserClosure() {
|
||||
}
|
||||
if (name === 'LZWDecode' || name === 'LZW') {
|
||||
xrefStreamStats[StreamType.LZW] = true;
|
||||
var earlyChange = 1;
|
||||
let earlyChange = 1;
|
||||
if (params) {
|
||||
if (params.has('EarlyChange')) {
|
||||
earlyChange = params.get('EarlyChange');
|
||||
@ -688,23 +703,52 @@ var Parser = (function ParserClosure() {
|
||||
xrefStreamStats[StreamType.JBIG] = true;
|
||||
return new Jbig2Stream(stream, maybeLength, stream.dict, params);
|
||||
}
|
||||
warn('filter "' + name + '" not supported yet');
|
||||
warn(`Filter "${name}" is not supported.`);
|
||||
return stream;
|
||||
} catch (ex) {
|
||||
if (ex instanceof MissingDataException) {
|
||||
throw ex;
|
||||
}
|
||||
warn('Invalid stream: \"' + ex + '\"');
|
||||
warn(`Invalid stream: "${ex}"`);
|
||||
return new NullStream();
|
||||
}
|
||||
},
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
return Parser;
|
||||
})();
|
||||
// A '1' in this array means the character is white space. A '1' or
|
||||
// '2' means the character ends a name or command.
|
||||
const specialChars = [
|
||||
1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, // 0x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 1x
|
||||
1, 0, 0, 0, 0, 2, 0, 0, 2, 2, 0, 0, 0, 0, 0, 2, // 2x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, // 3x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 4x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, // 5x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 6x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, // 7x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 8x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 9x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ax
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // bx
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // cx
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // dx
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ex
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 // fx
|
||||
];
|
||||
|
||||
var Lexer = (function LexerClosure() {
|
||||
function Lexer(stream, knownCommands) {
|
||||
function toHexDigit(ch) {
|
||||
if (ch >= 0x30 && ch <= 0x39) { // '0'-'9'
|
||||
return ch & 0x0F;
|
||||
}
|
||||
if ((ch >= 0x41 && ch <= 0x46) || (ch >= 0x61 && ch <= 0x66)) {
|
||||
// 'A'-'F', 'a'-'f'
|
||||
return (ch & 0x0F) + 9;
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
class Lexer {
|
||||
constructor(stream, knownCommands) {
|
||||
this.stream = stream;
|
||||
this.nextChar();
|
||||
|
||||
@ -727,50 +771,19 @@ var Lexer = (function LexerClosure() {
|
||||
this.beginInlineImagePos = -1;
|
||||
}
|
||||
|
||||
// A '1' in this array means the character is white space. A '1' or
|
||||
// '2' means the character ends a name or command.
|
||||
var specialChars = [
|
||||
1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, // 0x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 1x
|
||||
1, 0, 0, 0, 0, 2, 0, 0, 2, 2, 0, 0, 0, 0, 0, 2, // 2x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, // 3x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 4x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, // 5x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 6x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, // 7x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 8x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 9x
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ax
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // bx
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // cx
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // dx
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ex
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 // fx
|
||||
];
|
||||
|
||||
function toHexDigit(ch) {
|
||||
if (ch >= 0x30 && ch <= 0x39) { // '0'-'9'
|
||||
return ch & 0x0F;
|
||||
}
|
||||
if ((ch >= 0x41 && ch <= 0x46) || (ch >= 0x61 && ch <= 0x66)) {
|
||||
// 'A'-'F', 'a'-'f'
|
||||
return (ch & 0x0F) + 9;
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
Lexer.prototype = {
|
||||
nextChar: function Lexer_nextChar() {
|
||||
nextChar() {
|
||||
return (this.currentChar = this.stream.getByte());
|
||||
},
|
||||
peekChar: function Lexer_peekChar() {
|
||||
}
|
||||
|
||||
peekChar() {
|
||||
return this.stream.peekByte();
|
||||
},
|
||||
getNumber: function Lexer_getNumber() {
|
||||
var ch = this.currentChar;
|
||||
var eNotation = false;
|
||||
var divideBy = 0; // different from 0 if it's a floating point value
|
||||
var sign = 0;
|
||||
}
|
||||
|
||||
getNumber() {
|
||||
let ch = this.currentChar;
|
||||
let eNotation = false;
|
||||
let divideBy = 0; // Different from 0 if it's a floating point value.
|
||||
let sign = 0;
|
||||
|
||||
if (ch === 0x2D) { // '-'
|
||||
sign = -1;
|
||||
@ -806,17 +819,17 @@ var Lexer = (function LexerClosure() {
|
||||
}
|
||||
|
||||
sign = sign || 1;
|
||||
var baseValue = ch - 0x30; // '0'
|
||||
var powerValue = 0;
|
||||
var powerValueSign = 1;
|
||||
let baseValue = ch - 0x30; // '0'
|
||||
let powerValue = 0;
|
||||
let powerValueSign = 1;
|
||||
|
||||
while ((ch = this.nextChar()) >= 0) {
|
||||
if (0x30 <= ch && ch <= 0x39) { // '0' - '9'
|
||||
var currentDigit = ch - 0x30; // '0'
|
||||
if (eNotation) { // We are after an 'e' or 'E'
|
||||
const currentDigit = ch - 0x30; // '0'
|
||||
if (eNotation) { // We are after an 'e' or 'E'.
|
||||
powerValue = powerValue * 10 + currentDigit;
|
||||
} else {
|
||||
if (divideBy !== 0) { // We are after a point
|
||||
if (divideBy !== 0) { // We are after a point.
|
||||
divideBy *= 10;
|
||||
}
|
||||
baseValue = baseValue * 10 + currentDigit;
|
||||
@ -825,27 +838,27 @@ var Lexer = (function LexerClosure() {
|
||||
if (divideBy === 0) {
|
||||
divideBy = 1;
|
||||
} else {
|
||||
// A number can have only one '.'
|
||||
// A number can have only one dot.
|
||||
break;
|
||||
}
|
||||
} else if (ch === 0x2D) { // '-'
|
||||
// ignore minus signs in the middle of numbers to match
|
||||
// Adobe's behavior
|
||||
warn('Badly formatted number');
|
||||
// Ignore minus signs in the middle of numbers to match
|
||||
// Adobe's behavior.
|
||||
warn('Badly formatted number: minus sign in the middle');
|
||||
} else if (ch === 0x45 || ch === 0x65) { // 'E', 'e'
|
||||
// 'E' can be either a scientific notation or the beginning of a new
|
||||
// operator
|
||||
// operator.
|
||||
ch = this.peekChar();
|
||||
if (ch === 0x2B || ch === 0x2D) { // '+', '-'
|
||||
powerValueSign = (ch === 0x2D) ? -1 : 1;
|
||||
this.nextChar(); // Consume the sign character
|
||||
this.nextChar(); // Consume the sign character.
|
||||
} else if (ch < 0x30 || ch > 0x39) { // '0' - '9'
|
||||
// The 'E' must be the beginning of a new operator
|
||||
// The 'E' must be the beginning of a new operator.
|
||||
break;
|
||||
}
|
||||
eNotation = true;
|
||||
} else {
|
||||
// the last character doesn't belong to us
|
||||
// The last character doesn't belong to us.
|
||||
break;
|
||||
}
|
||||
}
|
||||
@ -857,16 +870,17 @@ var Lexer = (function LexerClosure() {
|
||||
baseValue *= Math.pow(10, powerValueSign * powerValue);
|
||||
}
|
||||
return sign * baseValue;
|
||||
},
|
||||
getString: function Lexer_getString() {
|
||||
var numParen = 1;
|
||||
var done = false;
|
||||
var strBuf = this.strBuf;
|
||||
}
|
||||
|
||||
getString() {
|
||||
let numParen = 1;
|
||||
let done = false;
|
||||
const strBuf = this.strBuf;
|
||||
strBuf.length = 0;
|
||||
|
||||
var ch = this.nextChar();
|
||||
let ch = this.nextChar();
|
||||
while (true) {
|
||||
var charBuffered = false;
|
||||
let charBuffered = false;
|
||||
switch (ch | 0) {
|
||||
case -1:
|
||||
warn('Unterminated string');
|
||||
@ -913,7 +927,7 @@ var Lexer = (function LexerClosure() {
|
||||
break;
|
||||
case 0x30: case 0x31: case 0x32: case 0x33: // '0'-'3'
|
||||
case 0x34: case 0x35: case 0x36: case 0x37: // '4'-'7'
|
||||
var x = ch & 0x0F;
|
||||
let x = ch & 0x0F;
|
||||
ch = this.nextChar();
|
||||
charBuffered = true;
|
||||
if (ch >= 0x30 && ch <= 0x37) { // '0'-'7'
|
||||
@ -950,11 +964,13 @@ var Lexer = (function LexerClosure() {
|
||||
}
|
||||
}
|
||||
return strBuf.join('');
|
||||
},
|
||||
getName: function Lexer_getName() {
|
||||
var ch, previousCh;
|
||||
var strBuf = this.strBuf;
|
||||
}
|
||||
|
||||
getName() {
|
||||
let ch, previousCh;
|
||||
const strBuf = this.strBuf;
|
||||
strBuf.length = 0;
|
||||
|
||||
while ((ch = this.nextChar()) >= 0 && !specialChars[ch]) {
|
||||
if (ch === 0x23) { // '#'
|
||||
ch = this.nextChar();
|
||||
@ -964,14 +980,14 @@ var Lexer = (function LexerClosure() {
|
||||
strBuf.push('#');
|
||||
break;
|
||||
}
|
||||
var x = toHexDigit(ch);
|
||||
const x = toHexDigit(ch);
|
||||
if (x !== -1) {
|
||||
previousCh = ch;
|
||||
ch = this.nextChar();
|
||||
var x2 = toHexDigit(ch);
|
||||
const x2 = toHexDigit(ch);
|
||||
if (x2 === -1) {
|
||||
warn('Lexer_getName: Illegal digit (' +
|
||||
String.fromCharCode(ch) + ') in hexadecimal number.');
|
||||
warn(`Lexer_getName: Illegal digit (${String.fromCharCode(ch)}) ` +
|
||||
'in hexadecimal number.');
|
||||
strBuf.push('#', String.fromCharCode(previousCh));
|
||||
if (specialChars[ch]) {
|
||||
break;
|
||||
@ -988,17 +1004,18 @@ var Lexer = (function LexerClosure() {
|
||||
}
|
||||
}
|
||||
if (strBuf.length > 127) {
|
||||
warn('name token is longer than allowed by the spec: ' + strBuf.length);
|
||||
warn(`Name token is longer than allowed by the spec: ${strBuf.length}`);
|
||||
}
|
||||
return Name.get(strBuf.join(''));
|
||||
},
|
||||
getHexString: function Lexer_getHexString() {
|
||||
var strBuf = this.strBuf;
|
||||
}
|
||||
|
||||
getHexString() {
|
||||
const strBuf = this.strBuf;
|
||||
strBuf.length = 0;
|
||||
var ch = this.currentChar;
|
||||
var isFirstHex = true;
|
||||
var firstDigit;
|
||||
var secondDigit;
|
||||
let ch = this.currentChar;
|
||||
let isFirstHex = true;
|
||||
let firstDigit, secondDigit;
|
||||
|
||||
while (true) {
|
||||
if (ch < 0) {
|
||||
warn('Unterminated hex string');
|
||||
@ -1013,14 +1030,14 @@ var Lexer = (function LexerClosure() {
|
||||
if (isFirstHex) {
|
||||
firstDigit = toHexDigit(ch);
|
||||
if (firstDigit === -1) {
|
||||
warn('Ignoring invalid character "' + ch + '" in hex string');
|
||||
warn(`Ignoring invalid character "${ch}" in hex string`);
|
||||
ch = this.nextChar();
|
||||
continue;
|
||||
}
|
||||
} else {
|
||||
secondDigit = toHexDigit(ch);
|
||||
if (secondDigit === -1) {
|
||||
warn('Ignoring invalid character "' + ch + '" in hex string');
|
||||
warn(`Ignoring invalid character "${ch}" in hex string`);
|
||||
ch = this.nextChar();
|
||||
continue;
|
||||
}
|
||||
@ -1031,11 +1048,12 @@ var Lexer = (function LexerClosure() {
|
||||
}
|
||||
}
|
||||
return strBuf.join('');
|
||||
},
|
||||
getObj: function Lexer_getObj() {
|
||||
// skip whitespace and comments
|
||||
var comment = false;
|
||||
var ch = this.currentChar;
|
||||
}
|
||||
|
||||
getObj() {
|
||||
// Skip whitespace and comments.
|
||||
let comment = false;
|
||||
let ch = this.currentChar;
|
||||
while (true) {
|
||||
if (ch < 0) {
|
||||
return EOF;
|
||||
@ -1052,7 +1070,7 @@ var Lexer = (function LexerClosure() {
|
||||
ch = this.nextChar();
|
||||
}
|
||||
|
||||
// start reading token
|
||||
// Start reading a token.
|
||||
switch (ch | 0) {
|
||||
case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: // '0'-'4'
|
||||
case 0x35: case 0x36: case 0x37: case 0x38: case 0x39: // '5'-'9'
|
||||
@ -1101,14 +1119,14 @@ var Lexer = (function LexerClosure() {
|
||||
throw new FormatError(`Illegal character: ${ch}`);
|
||||
}
|
||||
|
||||
// command
|
||||
var str = String.fromCharCode(ch);
|
||||
var knownCommands = this.knownCommands;
|
||||
var knownCommandFound = knownCommands && knownCommands[str] !== undefined;
|
||||
// Start reading a command.
|
||||
let str = String.fromCharCode(ch);
|
||||
const knownCommands = this.knownCommands;
|
||||
let knownCommandFound = knownCommands && knownCommands[str] !== undefined;
|
||||
while ((ch = this.nextChar()) >= 0 && !specialChars[ch]) {
|
||||
// stop if known command is found and next character does not make
|
||||
// the str a command
|
||||
var possibleCommand = str + String.fromCharCode(ch);
|
||||
// Stop if a known command is found and next character does not make
|
||||
// the string a command.
|
||||
const possibleCommand = str + String.fromCharCode(ch);
|
||||
if (knownCommandFound && knownCommands[possibleCommand] === undefined) {
|
||||
break;
|
||||
}
|
||||
@ -1135,9 +1153,10 @@ var Lexer = (function LexerClosure() {
|
||||
}
|
||||
|
||||
return Cmd.get(str);
|
||||
},
|
||||
skipToNextLine: function Lexer_skipToNextLine() {
|
||||
var ch = this.currentChar;
|
||||
}
|
||||
|
||||
skipToNextLine() {
|
||||
let ch = this.currentChar;
|
||||
while (ch >= 0) {
|
||||
if (ch === 0x0D) { // CR
|
||||
ch = this.nextChar();
|
||||
@ -1151,61 +1170,64 @@ var Lexer = (function LexerClosure() {
|
||||
}
|
||||
ch = this.nextChar();
|
||||
}
|
||||
},
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
return Lexer;
|
||||
})();
|
||||
|
||||
var Linearization = {
|
||||
create: function LinearizationCreate(stream) {
|
||||
function getInt(name, allowZeroValue) {
|
||||
var obj = linDict.get(name);
|
||||
class Linearization {
|
||||
static create(stream) {
|
||||
function getInt(linDict, name, allowZeroValue = false) {
|
||||
const obj = linDict.get(name);
|
||||
if (Number.isInteger(obj) && (allowZeroValue ? obj >= 0 : obj > 0)) {
|
||||
return obj;
|
||||
}
|
||||
throw new Error('The "' + name + '" parameter in the linearization ' +
|
||||
throw new Error(`The "${name}" parameter in the linearization ` +
|
||||
'dictionary is invalid.');
|
||||
}
|
||||
function getHints() {
|
||||
var hints = linDict.get('H'), hintsLength, item;
|
||||
|
||||
function getHints(linDict) {
|
||||
const hints = linDict.get('H');
|
||||
let hintsLength;
|
||||
|
||||
if (Array.isArray(hints) &&
|
||||
((hintsLength = hints.length) === 2 || hintsLength === 4)) {
|
||||
for (var index = 0; index < hintsLength; index++) {
|
||||
if (!(Number.isInteger(item = hints[index]) && item > 0)) {
|
||||
throw new Error('Hint (' + index +
|
||||
') in the linearization dictionary is invalid.');
|
||||
for (let index = 0; index < hintsLength; index++) {
|
||||
const 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.');
|
||||
}
|
||||
var parser = new Parser(new Lexer(stream), false, null);
|
||||
var obj1 = parser.getObj();
|
||||
var obj2 = parser.getObj();
|
||||
var obj3 = parser.getObj();
|
||||
var linDict = parser.getObj();
|
||||
var obj, length;
|
||||
|
||||
const parser = new Parser(new Lexer(stream), false, null);
|
||||
const obj1 = parser.getObj();
|
||||
const obj2 = parser.getObj();
|
||||
const obj3 = parser.getObj();
|
||||
const linDict = parser.getObj();
|
||||
let obj, length;
|
||||
if (!(Number.isInteger(obj1) && Number.isInteger(obj2) &&
|
||||
isCmd(obj3, 'obj') && isDict(linDict) &&
|
||||
isNum(obj = linDict.get('Linearized')) && obj > 0)) {
|
||||
return null; // No valid linearization dictionary found.
|
||||
} else if ((length = getInt('L')) !== stream.length) {
|
||||
} else if ((length = getInt(linDict, 'L')) !== stream.length) {
|
||||
throw new Error('The "L" parameter in the linearization dictionary ' +
|
||||
'does not equal the stream length.');
|
||||
}
|
||||
return {
|
||||
length,
|
||||
hints: getHints(),
|
||||
objectNumberFirst: getInt('O'),
|
||||
endFirst: getInt('E'),
|
||||
numPages: getInt('N'),
|
||||
mainXRefEntriesOffset: getInt('T'),
|
||||
pageFirst: (linDict.has('P') ? getInt('P', true) : 0),
|
||||
hints: getHints(linDict),
|
||||
objectNumberFirst: getInt(linDict, 'O'),
|
||||
endFirst: getInt(linDict, 'E'),
|
||||
numPages: getInt(linDict, 'N'),
|
||||
mainXRefEntriesOffset: getInt(linDict, 'T'),
|
||||
pageFirst: (linDict.has('P') ?
|
||||
getInt(linDict, 'P', /* allowZeroValue = */ true) : 0),
|
||||
};
|
||||
},
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
export {
|
||||
Lexer,
|
||||
|
||||
@ -12,74 +12,129 @@
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
/* eslint no-var: error */
|
||||
|
||||
import { Lexer, Linearization } from '../../src/core/parser';
|
||||
import { Lexer, Linearization, Parser } from '../../src/core/parser';
|
||||
import { FormatError } from '../../src/shared/util';
|
||||
import { Name } from '../../src/core/primitives';
|
||||
import { StringStream } from '../../src/core/stream';
|
||||
|
||||
describe('parser', function() {
|
||||
describe('Lexer', function() {
|
||||
it('should stop parsing numbers at the end of stream', function() {
|
||||
var input = new StringStream('11.234');
|
||||
var lexer = new Lexer(input);
|
||||
var result = lexer.getNumber();
|
||||
describe('Parser', function() {
|
||||
describe('inlineStreamSkipEI', function() {
|
||||
it('should skip over the EI marker if it is found', function() {
|
||||
const string = 'q 1 0 0 1 0 0 cm BI /W 10 /H 10 /BPC 1 ' +
|
||||
'/F /A85 ID abc123~> EI Q';
|
||||
const input = new StringStream(string);
|
||||
const lexer = new Lexer(input);
|
||||
const parser = new Parser(lexer, /* allowStreams = */ true,
|
||||
/* xref = */ null);
|
||||
parser.inlineStreamSkipEI(input);
|
||||
expect(input.pos).toEqual(string.indexOf('Q'));
|
||||
expect(input.peekByte()).toEqual(0x51); // 'Q'
|
||||
});
|
||||
|
||||
expect(result).toEqual(11.234);
|
||||
it('should skip to the end of stream if the EI marker is not found',
|
||||
function() {
|
||||
const string = 'q 1 0 0 1 0 0 cm BI /W 10 /H 10 /BPC 1 ' +
|
||||
'/F /A85 ID abc123~> Q';
|
||||
const input = new StringStream(string);
|
||||
const lexer = new Lexer(input);
|
||||
const parser = new Parser(lexer, /* allowStreams = */ true,
|
||||
/* xref = */ null);
|
||||
parser.inlineStreamSkipEI(input);
|
||||
expect(input.pos).toEqual(string.length);
|
||||
expect(input.peekByte()).toEqual(-1);
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('Lexer', function() {
|
||||
describe('nextChar', function() {
|
||||
it('should return and set -1 when the end of the stream is reached',
|
||||
function() {
|
||||
const input = new StringStream('');
|
||||
const lexer = new Lexer(input);
|
||||
expect(lexer.nextChar()).toEqual(-1);
|
||||
expect(lexer.currentChar).toEqual(-1);
|
||||
});
|
||||
|
||||
it('should return and set the character after the current position',
|
||||
function() {
|
||||
const input = new StringStream('123');
|
||||
const lexer = new Lexer(input);
|
||||
expect(lexer.nextChar()).toEqual(0x32); // '2'
|
||||
expect(lexer.currentChar).toEqual(0x32); // '2'
|
||||
});
|
||||
});
|
||||
|
||||
describe('peekChar', function() {
|
||||
it('should only return -1 when the end of the stream is reached',
|
||||
function() {
|
||||
const input = new StringStream('');
|
||||
const lexer = new Lexer(input);
|
||||
expect(lexer.peekChar()).toEqual(-1);
|
||||
expect(lexer.currentChar).toEqual(-1);
|
||||
});
|
||||
|
||||
it('should only return the character after the current position',
|
||||
function() {
|
||||
const input = new StringStream('123');
|
||||
const lexer = new Lexer(input);
|
||||
expect(lexer.peekChar()).toEqual(0x32); // '2'
|
||||
expect(lexer.currentChar).toEqual(0x31); // '1'
|
||||
});
|
||||
});
|
||||
|
||||
describe('getNumber', function() {
|
||||
it('should stop parsing numbers at the end of stream', function() {
|
||||
const input = new StringStream('11.234');
|
||||
const lexer = new Lexer(input);
|
||||
expect(lexer.getNumber()).toEqual(11.234);
|
||||
});
|
||||
|
||||
it('should parse PostScript numbers', function() {
|
||||
var numbers = ['-.002', '34.5', '-3.62', '123.6e10', '1E-5', '-1.', '0.0',
|
||||
'123', '-98', '43445', '0', '+17'];
|
||||
for (var i = 0, ii = numbers.length; i < ii; i++) {
|
||||
var num = numbers[i];
|
||||
var input = new StringStream(num);
|
||||
var lexer = new Lexer(input);
|
||||
var result = lexer.getNumber();
|
||||
|
||||
expect(result).toEqual(parseFloat(num));
|
||||
const numbers = ['-.002', '34.5', '-3.62', '123.6e10', '1E-5', '-1.',
|
||||
'0.0', '123', '-98', '43445', '0', '+17'];
|
||||
for (const number of numbers) {
|
||||
const input = new StringStream(number);
|
||||
const lexer = new Lexer(input);
|
||||
expect(lexer.getNumber()).toEqual(parseFloat(number));
|
||||
}
|
||||
});
|
||||
|
||||
it('should ignore double negative before number', function() {
|
||||
var input = new StringStream('--205.88');
|
||||
var lexer = new Lexer(input);
|
||||
var result = lexer.getNumber();
|
||||
|
||||
expect(result).toEqual(-205.88);
|
||||
const input = new StringStream('--205.88');
|
||||
const lexer = new Lexer(input);
|
||||
expect(lexer.getNumber()).toEqual(-205.88);
|
||||
});
|
||||
|
||||
it('should ignore minus signs in the middle of number', function() {
|
||||
var input = new StringStream('205--.88');
|
||||
var lexer = new Lexer(input);
|
||||
var result = lexer.getNumber();
|
||||
|
||||
expect(result).toEqual(205.88);
|
||||
const input = new StringStream('205--.88');
|
||||
const lexer = new Lexer(input);
|
||||
expect(lexer.getNumber()).toEqual(205.88);
|
||||
});
|
||||
|
||||
it('should ignore line-breaks between operator and digit in number',
|
||||
function() {
|
||||
let minusInput = new StringStream('-\r\n205.88');
|
||||
let minusLexer = new Lexer(minusInput);
|
||||
|
||||
const minusInput = new StringStream('-\r\n205.88');
|
||||
const minusLexer = new Lexer(minusInput);
|
||||
expect(minusLexer.getNumber()).toEqual(-205.88);
|
||||
|
||||
let plusInput = new StringStream('+\r\n205.88');
|
||||
let plusLexer = new Lexer(plusInput);
|
||||
|
||||
const plusInput = new StringStream('+\r\n205.88');
|
||||
const plusLexer = new Lexer(plusInput);
|
||||
expect(plusLexer.getNumber()).toEqual(205.88);
|
||||
});
|
||||
|
||||
it('should treat a single decimal point as zero', function() {
|
||||
let input = new StringStream('.');
|
||||
let lexer = new Lexer(input);
|
||||
|
||||
const input = new StringStream('.');
|
||||
const lexer = new Lexer(input);
|
||||
expect(lexer.getNumber()).toEqual(0);
|
||||
|
||||
let numbers = ['..', '-.', '+.', '-\r\n.', '+\r\n.'];
|
||||
for (let number of numbers) {
|
||||
let input = new StringStream(number);
|
||||
let lexer = new Lexer(input);
|
||||
const numbers = ['..', '-.', '+.', '-\r\n.', '+\r\n.'];
|
||||
for (const number of numbers) {
|
||||
const input = new StringStream(number);
|
||||
const lexer = new Lexer(input);
|
||||
|
||||
expect(function() {
|
||||
return lexer.getNumber();
|
||||
@ -88,68 +143,62 @@ describe('parser', function() {
|
||||
});
|
||||
|
||||
it('should handle glued numbers and operators', function() {
|
||||
var input = new StringStream('123ET');
|
||||
var lexer = new Lexer(input);
|
||||
var value = lexer.getNumber();
|
||||
|
||||
expect(value).toEqual(123);
|
||||
const input = new StringStream('123ET');
|
||||
const lexer = new Lexer(input);
|
||||
expect(lexer.getNumber()).toEqual(123);
|
||||
// The lexer must not have consumed the 'E'
|
||||
expect(lexer.currentChar).toEqual(0x45); // 'E'
|
||||
});
|
||||
|
||||
it('should stop parsing strings at the end of stream', function() {
|
||||
var input = new StringStream('(1$4)');
|
||||
input.getByte = function(super_getByte) {
|
||||
// simulating end of file using null (see issue 2766)
|
||||
var ch = super_getByte.call(input);
|
||||
return (ch === 0x24 /* '$' */ ? -1 : ch);
|
||||
}.bind(input, input.getByte);
|
||||
var lexer = new Lexer(input);
|
||||
var result = lexer.getString();
|
||||
|
||||
expect(result).toEqual('1');
|
||||
});
|
||||
|
||||
it('should not throw exception on bad input', function() {
|
||||
// '8 0 2 15 5 2 2 2 4 3 2 4'
|
||||
// should be parsed as
|
||||
// '80 21 55 22 24 32'
|
||||
var input = new StringStream('<7 0 2 15 5 2 2 2 4 3 2 4>');
|
||||
var lexer = new Lexer(input);
|
||||
var result = lexer.getHexString();
|
||||
|
||||
expect(result).toEqual('p!U"$2');
|
||||
describe('getString', function() {
|
||||
it('should stop parsing strings at the end of stream', function() {
|
||||
const input = new StringStream('(1$4)');
|
||||
input.getByte = function(super_getByte) {
|
||||
// Simulating end of file using null (see issue 2766).
|
||||
const ch = super_getByte.call(input);
|
||||
return (ch === 0x24 /* '$' */ ? -1 : ch);
|
||||
}.bind(input, input.getByte);
|
||||
const lexer = new Lexer(input);
|
||||
expect(lexer.getString()).toEqual('1');
|
||||
});
|
||||
|
||||
it('should ignore escaped CR and LF', function() {
|
||||
// '(\101\<CR><LF>\102)'
|
||||
// should be parsed as
|
||||
// "AB"
|
||||
var input = new StringStream('(\\101\\\r\n\\102\\\r\\103\\\n\\104)');
|
||||
var lexer = new Lexer(input);
|
||||
var result = lexer.getString();
|
||||
|
||||
expect(result).toEqual('ABCD');
|
||||
// '(\101\<CR><LF>\102)' should be parsed as 'AB'.
|
||||
const input = new StringStream('(\\101\\\r\n\\102\\\r\\103\\\n\\104)');
|
||||
const lexer = new Lexer(input);
|
||||
expect(lexer.getString()).toEqual('ABCD');
|
||||
});
|
||||
});
|
||||
|
||||
it('should handle Names with invalid usage of NUMBER SIGN (#)', function() {
|
||||
var inputNames = ['/# 680 0 R', '/#AQwerty', '/#A<</B'];
|
||||
var expectedNames = ['#', '#AQwerty', '#A'];
|
||||
describe('getHexString', function() {
|
||||
it('should not throw exception on bad input', function() {
|
||||
// '7 0 2 15 5 2 2 2 4 3 2 4' should be parsed as '70 21 55 22 24 32'.
|
||||
const input = new StringStream('<7 0 2 15 5 2 2 2 4 3 2 4>');
|
||||
const lexer = new Lexer(input);
|
||||
expect(lexer.getHexString()).toEqual('p!U"$2');
|
||||
});
|
||||
});
|
||||
|
||||
for (var i = 0, ii = inputNames.length; i < ii; i++) {
|
||||
var input = new StringStream(inputNames[i]);
|
||||
var lexer = new Lexer(input);
|
||||
var result = lexer.getName();
|
||||
describe('getName', function() {
|
||||
it('should handle Names with invalid usage of NUMBER SIGN (#)',
|
||||
function() {
|
||||
const inputNames = ['/# 680 0 R', '/#AQwerty', '/#A<</B'];
|
||||
const expectedNames = ['#', '#AQwerty', '#A'];
|
||||
|
||||
expect(result).toEqual(Name.get(expectedNames[i]));
|
||||
for (let i = 0, ii = inputNames.length; i < ii; i++) {
|
||||
const input = new StringStream(inputNames[i]);
|
||||
const lexer = new Lexer(input);
|
||||
expect(lexer.getName()).toEqual(Name.get(expectedNames[i]));
|
||||
}
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('Linearization', function() {
|
||||
it('should not find a linearization dictionary', function () {
|
||||
it('should not find a linearization dictionary', function() {
|
||||
// Not an actual linearization dictionary.
|
||||
var stream1 = new StringStream(
|
||||
const stream1 = new StringStream(
|
||||
'3 0 obj\n' +
|
||||
'<<\n' +
|
||||
'/Length 4622\n' +
|
||||
@ -160,7 +209,7 @@ describe('parser', function() {
|
||||
expect(Linearization.create(stream1)).toEqual(null);
|
||||
|
||||
// Linearization dictionary with invalid version number.
|
||||
var stream2 = new StringStream(
|
||||
const stream2 = new StringStream(
|
||||
'1 0 obj\n' +
|
||||
'<<\n' +
|
||||
'/Linearized 0\n' +
|
||||
@ -170,8 +219,8 @@ describe('parser', function() {
|
||||
expect(Linearization.create(stream2)).toEqual(null);
|
||||
});
|
||||
|
||||
it('should accept a valid linearization dictionary', function () {
|
||||
var stream = new StringStream(
|
||||
it('should accept a valid linearization dictionary', function() {
|
||||
const stream = new StringStream(
|
||||
'131 0 obj\n' +
|
||||
'<<\n' +
|
||||
'/Linearized 1\n' +
|
||||
@ -184,7 +233,7 @@ describe('parser', function() {
|
||||
'>>\n' +
|
||||
'endobj'
|
||||
);
|
||||
var expectedLinearizationDict = {
|
||||
const expectedLinearizationDict = {
|
||||
length: 90,
|
||||
hints: [1388, 863],
|
||||
objectNumberFirst: 133,
|
||||
@ -197,9 +246,9 @@ describe('parser', function() {
|
||||
});
|
||||
|
||||
it('should reject a linearization dictionary with invalid ' +
|
||||
'integer parameters', function () {
|
||||
'integer parameters', function() {
|
||||
// The /L parameter should be equal to the stream length.
|
||||
var stream1 = new StringStream(
|
||||
const stream1 = new StringStream(
|
||||
'1 0 obj\n' +
|
||||
'<<\n' +
|
||||
'/Linearized 1\n' +
|
||||
@ -212,13 +261,13 @@ describe('parser', function() {
|
||||
'>>\n' +
|
||||
'endobj'
|
||||
);
|
||||
expect(function () {
|
||||
expect(function() {
|
||||
return Linearization.create(stream1);
|
||||
}).toThrow(new Error('The "L" parameter in the linearization ' +
|
||||
'dictionary does not equal the stream length.'));
|
||||
|
||||
// The /E parameter should not be zero.
|
||||
var stream2 = new StringStream(
|
||||
const stream2 = new StringStream(
|
||||
'1 0 obj\n' +
|
||||
'<<\n' +
|
||||
'/Linearized 1\n' +
|
||||
@ -231,13 +280,13 @@ describe('parser', function() {
|
||||
'>>\n' +
|
||||
'endobj'
|
||||
);
|
||||
expect(function () {
|
||||
expect(function() {
|
||||
return Linearization.create(stream2);
|
||||
}).toThrow(new Error('The "E" parameter in the linearization ' +
|
||||
'dictionary is invalid.'));
|
||||
|
||||
// The /O parameter should be an integer.
|
||||
var stream3 = new StringStream(
|
||||
const stream3 = new StringStream(
|
||||
'1 0 obj\n' +
|
||||
'<<\n' +
|
||||
'/Linearized 1\n' +
|
||||
@ -250,16 +299,16 @@ describe('parser', function() {
|
||||
'>>\n' +
|
||||
'endobj'
|
||||
);
|
||||
expect(function () {
|
||||
expect(function() {
|
||||
return Linearization.create(stream3);
|
||||
}).toThrow(new Error('The "O" parameter in the linearization ' +
|
||||
'dictionary is invalid.'));
|
||||
});
|
||||
|
||||
it('should reject a linearization dictionary with invalid hint parameters',
|
||||
function () {
|
||||
function() {
|
||||
// The /H parameter should be an array.
|
||||
var stream1 = new StringStream(
|
||||
const stream1 = new StringStream(
|
||||
'1 0 obj\n' +
|
||||
'<<\n' +
|
||||
'/Linearized 1\n' +
|
||||
@ -272,13 +321,13 @@ describe('parser', function() {
|
||||
'>>\n' +
|
||||
'endobj'
|
||||
);
|
||||
expect(function () {
|
||||
expect(function() {
|
||||
return Linearization.create(stream1);
|
||||
}).toThrow(new Error('Hint array in the linearization dictionary ' +
|
||||
'is invalid.'));
|
||||
|
||||
// The hint array should contain two, or four, elements.
|
||||
var stream2 = new StringStream(
|
||||
const stream2 = new StringStream(
|
||||
'1 0 obj\n' +
|
||||
'<<\n' +
|
||||
'/Linearized 1\n' +
|
||||
@ -291,13 +340,13 @@ describe('parser', function() {
|
||||
'>>\n' +
|
||||
'endobj'
|
||||
);
|
||||
expect(function () {
|
||||
expect(function() {
|
||||
return Linearization.create(stream2);
|
||||
}).toThrow(new Error('Hint array in the linearization dictionary ' +
|
||||
'is invalid.'));
|
||||
|
||||
// The hint array should not contain zero.
|
||||
var stream3 = new StringStream(
|
||||
const stream3 = new StringStream(
|
||||
'1 0 obj\n' +
|
||||
'<<\n' +
|
||||
'/Linearized 1\n' +
|
||||
@ -310,7 +359,7 @@ describe('parser', function() {
|
||||
'>>\n' +
|
||||
'endobj'
|
||||
);
|
||||
expect(function () {
|
||||
expect(function() {
|
||||
return Linearization.create(stream3);
|
||||
}).toThrow(new Error('Hint (2) in the linearization dictionary ' +
|
||||
'is invalid.'));
|
||||
|
||||
Loading…
Reference in New Issue
Block a user