This file is indexed.

/usr/share/pyshared/pyPdf/generic.py is in python-pypdf 1.13-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
# vim: sw=4:expandtab:foldmethod=marker
#
# Copyright (c) 2006, Mathieu Fenniak
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# * The name of the author may not be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.


"""
Implementation of generic PDF objects (dictionary, number, string, and so on)
"""
__author__ = "Mathieu Fenniak"
__author_email__ = "biziqe@mathieu.fenniak.net"

import re
from utils import readNonWhitespace, readUntilWhitespace, RC4_encrypt
import filters
import utils
import decimal
import codecs

def readObject(stream, pdf):
    tok = stream.read(1)
    stream.seek(-1, 1) # reset to start
    if tok == 't' or tok == 'f':
        # boolean object
        return BooleanObject.readFromStream(stream)
    elif tok == '(':
        # string object
        return readStringFromStream(stream)
    elif tok == '/':
        # name object
        return NameObject.readFromStream(stream)
    elif tok == '[':
        # array object
        return ArrayObject.readFromStream(stream, pdf)
    elif tok == 'n':
        # null object
        return NullObject.readFromStream(stream)
    elif tok == '<':
        # hexadecimal string OR dictionary
        peek = stream.read(2)
        stream.seek(-2, 1) # reset to start
        if peek == '<<':
            return DictionaryObject.readFromStream(stream, pdf)
        else:
            return readHexStringFromStream(stream)
    elif tok == '%':
        # comment
        while tok not in ('\r', '\n'):
            tok = stream.read(1)
        tok = readNonWhitespace(stream)
        stream.seek(-1, 1)
        return readObject(stream, pdf)
    else:
        # number object OR indirect reference
        if tok == '+' or tok == '-':
            # number
            return NumberObject.readFromStream(stream)
        peek = stream.read(20)
        stream.seek(-len(peek), 1) # reset to start
        if re.match(r"(\d+)\s+(\d+)\sR[^a-zA-Z]", peek) != None:
            return IndirectObject.readFromStream(stream, pdf)
        else:
            return NumberObject.readFromStream(stream)

class PdfObject(object):
    def getObject(self):
        """Resolves indirect references."""
        return self


class NullObject(PdfObject):
    def writeToStream(self, stream, encryption_key):
        stream.write("null")

    def readFromStream(stream):
        nulltxt = stream.read(4)
        if nulltxt != "null":
            raise utils.PdfReadError, "error reading null object"
        return NullObject()
    readFromStream = staticmethod(readFromStream)


class BooleanObject(PdfObject):
    def __init__(self, value):
        self.value = value

    def writeToStream(self, stream, encryption_key):
        if self.value:
            stream.write("true")
        else:
            stream.write("false")

    def readFromStream(stream):
        word = stream.read(4)
        if word == "true":
            return BooleanObject(True)
        elif word == "fals":
            stream.read(1)
            return BooleanObject(False)
        assert False
    readFromStream = staticmethod(readFromStream)


class ArrayObject(list, PdfObject):
    def writeToStream(self, stream, encryption_key):
        stream.write("[")
        for data in self:
            stream.write(" ")
            data.writeToStream(stream, encryption_key)
        stream.write(" ]")

    def readFromStream(stream, pdf):
        arr = ArrayObject()
        tmp = stream.read(1)
        if tmp != "[":
            raise utils.PdfReadError, "error reading array"
        while True:
            # skip leading whitespace
            tok = stream.read(1)
            while tok.isspace():
                tok = stream.read(1)
            stream.seek(-1, 1)
            # check for array ending
            peekahead = stream.read(1)
            if peekahead == "]":
                break
            stream.seek(-1, 1)
            # read and append obj
            arr.append(readObject(stream, pdf))
        return arr
    readFromStream = staticmethod(readFromStream)


class IndirectObject(PdfObject):
    def __init__(self, idnum, generation, pdf):
        self.idnum = idnum
        self.generation = generation
        self.pdf = pdf

    def getObject(self):
        return self.pdf.getObject(self).getObject()

    def __repr__(self):
        return "IndirectObject(%r, %r)" % (self.idnum, self.generation)

    def __eq__(self, other):
        return (
            other != None and
            isinstance(other, IndirectObject) and
            self.idnum == other.idnum and
            self.generation == other.generation and
            self.pdf is other.pdf
            )

    def __ne__(self, other):
        return not self.__eq__(other)

    def writeToStream(self, stream, encryption_key):
        stream.write("%s %s R" % (self.idnum, self.generation))

    def readFromStream(stream, pdf):
        idnum = readUntilWhitespace(stream)
        readNonWhitespace(stream); stream.seek(-1, 1)
        generation = readUntilWhitespace(stream)
        r = readNonWhitespace(stream)
        if r != "R":
            raise utils.PdfReadError("error reading indirect object reference")
        return IndirectObject(int(idnum), int(generation), pdf)
    readFromStream = staticmethod(readFromStream)


class FloatObject(decimal.Decimal, PdfObject):
    def __new__(cls, value="0", context=None):
        return decimal.Decimal.__new__(cls, str(value), context)
    def __repr__(self):
        if self == self.to_integral():
            return str(self.quantize(decimal.Decimal(1)))
        else:
            # XXX: this adds useless extraneous zeros.
            return "%.5f" % self
    def writeToStream(self, stream, encryption_key):
        stream.write(repr(self))


class NumberObject(int, PdfObject):
    def __init__(self, value):
        int.__init__(value)

    def writeToStream(self, stream, encryption_key):
        stream.write(repr(self))

    def readFromStream(stream):
        name = ""
        while True:
            tok = stream.read(1)
            if tok != '+' and tok != '-' and tok != '.' and not tok.isdigit():
                stream.seek(-1, 1)
                break
            name += tok
        if name.find(".") != -1:
            return FloatObject(name)
        else:
            return NumberObject(name)
    readFromStream = staticmethod(readFromStream)


##
# Given a string (either a "str" or "unicode"), create a ByteStringObject or a
# TextStringObject to represent the string.
def createStringObject(string):
    if isinstance(string, unicode):
        return TextStringObject(string)
    elif isinstance(string, str):
        if string.startswith(codecs.BOM_UTF16_BE):
            retval = TextStringObject(string.decode("utf-16"))
            retval.autodetect_utf16 = True
            return retval
        else:
            # This is probably a big performance hit here, but we need to
            # convert string objects into the text/unicode-aware version if
            # possible... and the only way to check if that's possible is
            # to try.  Some strings are strings, some are just byte arrays.
            try:
                retval = TextStringObject(decode_pdfdocencoding(string))
                retval.autodetect_pdfdocencoding = True
                return retval
            except UnicodeDecodeError:
                return ByteStringObject(string)
    else:
        raise TypeError("createStringObject should have str or unicode arg")


def readHexStringFromStream(stream):
    stream.read(1)
    txt = ""
    x = ""
    while True:
        tok = readNonWhitespace(stream)
        if tok == ">":
            break
        x += tok
        if len(x) == 2:
            txt += chr(int(x, base=16))
            x = ""
    if len(x) == 1:
        x += "0"
    if len(x) == 2:
        txt += chr(int(x, base=16))
    return createStringObject(txt)


def readStringFromStream(stream):
    tok = stream.read(1)
    parens = 1
    txt = ""
    while True:
        tok = stream.read(1)
        if tok == "(":
            parens += 1
        elif tok == ")":
            parens -= 1
            if parens == 0:
                break
        elif tok == "\\":
            tok = stream.read(1)
            if tok == "n":
                tok = "\n"
            elif tok == "r":
                tok = "\r"
            elif tok == "t":
                tok = "\t"
            elif tok == "b":
                tok = "\b"
            elif tok == "f":
                tok = "\f"
            elif tok == "(":
                tok = "("
            elif tok == ")":
                tok = ")"
            elif tok == "\\":
                tok = "\\"
            elif tok.isdigit():
                # "The number ddd may consist of one, two, or three
                # octal digits; high-order overflow shall be ignored.
                # Three octal digits shall be used, with leading zeros
                # as needed, if the next character of the string is also
                # a digit." (PDF reference 7.3.4.2, p 16)
                for i in range(2):
                    ntok = stream.read(1)
                    if ntok.isdigit():
                        tok += ntok
                    else:
                        break
                tok = chr(int(tok, base=8))
            elif tok in "\n\r":
                # This case is  hit when a backslash followed by a line
                # break occurs.  If it's a multi-char EOL, consume the
                # second character:
                tok = stream.read(1)
                if not tok in "\n\r":
                    stream.seek(-1, 1)
                # Then don't add anything to the actual string, since this
                # line break was escaped:
                tok = ''
            else:
                raise utils.PdfReadError("Unexpected escaped string")
        txt += tok
    return createStringObject(txt)


##
# Represents a string object where the text encoding could not be determined.
# This occurs quite often, as the PDF spec doesn't provide an alternate way to
# represent strings -- for example, the encryption data stored in files (like
# /O) is clearly not text, but is still stored in a "String" object.
class ByteStringObject(str, PdfObject):

    ##
    # For compatibility with TextStringObject.original_bytes.  This method
    # returns self.
    original_bytes = property(lambda self: self)

    def writeToStream(self, stream, encryption_key):
        bytearr = self
        if encryption_key:
            bytearr = RC4_encrypt(encryption_key, bytearr)
        stream.write("<")
        stream.write(bytearr.encode("hex"))
        stream.write(">")


##
# Represents a string object that has been decoded into a real unicode string.
# If read from a PDF document, this string appeared to match the
# PDFDocEncoding, or contained a UTF-16BE BOM mark to cause UTF-16 decoding to
# occur.
class TextStringObject(unicode, PdfObject):
    autodetect_pdfdocencoding = False
    autodetect_utf16 = False

    ##
    # It is occasionally possible that a text string object gets created where
    # a byte string object was expected due to the autodetection mechanism --
    # if that occurs, this "original_bytes" property can be used to
    # back-calculate what the original encoded bytes were.
    original_bytes = property(lambda self: self.get_original_bytes())

    def get_original_bytes(self):
        # We're a text string object, but the library is trying to get our raw
        # bytes.  This can happen if we auto-detected this string as text, but
        # we were wrong.  It's pretty common.  Return the original bytes that
        # would have been used to create this object, based upon the autodetect
        # method.
        if self.autodetect_utf16:
            return codecs.BOM_UTF16_BE + self.encode("utf-16be")
        elif self.autodetect_pdfdocencoding:
            return encode_pdfdocencoding(self)
        else:
            raise Exception("no information about original bytes")

    def writeToStream(self, stream, encryption_key):
        # Try to write the string out as a PDFDocEncoding encoded string.  It's
        # nicer to look at in the PDF file.  Sadly, we take a performance hit
        # here for trying...
        try:
            bytearr = encode_pdfdocencoding(self)
        except UnicodeEncodeError:
            bytearr = codecs.BOM_UTF16_BE + self.encode("utf-16be")
        if encryption_key:
            bytearr = RC4_encrypt(encryption_key, bytearr)
            obj = ByteStringObject(bytearr)
            obj.writeToStream(stream, None)
        else:
            stream.write("(")
            for c in bytearr:
                if not c.isalnum() and c != ' ':
                    stream.write("\\%03o" % ord(c))
                else:
                    stream.write(c)
            stream.write(")")


class NameObject(str, PdfObject):
    delimiterCharacters = "(", ")", "<", ">", "[", "]", "{", "}", "/", "%"

    def __init__(self, data):
        str.__init__(data)

    def writeToStream(self, stream, encryption_key):
        stream.write(self)

    def readFromStream(stream):
        name = stream.read(1)
        if name != "/":
            raise utils.PdfReadError, "name read error"
        while True:
            tok = stream.read(1)
            if tok.isspace() or tok in NameObject.delimiterCharacters:
                stream.seek(-1, 1)
                break
            name += tok
        return NameObject(name)
    readFromStream = staticmethod(readFromStream)


class DictionaryObject(dict, PdfObject):

    def __init__(self, *args, **kwargs):
        if len(args) == 0:
            self.update(kwargs)
        elif len(args) == 1:
            arr = args[0]
            # If we're passed a list/tuple, make a dict out of it
            if not hasattr(arr, "iteritems"):
                newarr = {}
                for k, v in arr:
                    newarr[k] = v
                arr = newarr
            self.update(arr)
        else:
            raise TypeError("dict expected at most 1 argument, got 3")

    def update(self, arr):
        # note, a ValueError halfway through copying values
        # will leave half the values in this dict.
        for k, v in arr.iteritems():
            self.__setitem__(k, v)

    def raw_get(self, key):
        return dict.__getitem__(self, key)

    def __setitem__(self, key, value):
        if not isinstance(key, PdfObject):
            raise ValueError("key must be PdfObject")
        if not isinstance(value, PdfObject):
            raise ValueError("value must be PdfObject")
        return dict.__setitem__(self, key, value)

    def setdefault(self, key, value=None):
        if not isinstance(key, PdfObject):
            raise ValueError("key must be PdfObject")
        if not isinstance(value, PdfObject):
            raise ValueError("value must be PdfObject")
        return dict.setdefault(self, key, value)

    def __getitem__(self, key):
        return dict.__getitem__(self, key).getObject()

    ##
    # Retrieves XMP (Extensible Metadata Platform) data relevant to the
    # this object, if available.
    # <p>
    # Stability: Added in v1.12, will exist for all future v1.x releases.
    # @return Returns a {@link #xmp.XmpInformation XmlInformation} instance
    # that can be used to access XMP metadata from the document.  Can also
    # return None if no metadata was found on the document root.
    def getXmpMetadata(self):
        metadata = self.get("/Metadata", None)
        if metadata == None:
            return None
        metadata = metadata.getObject()
        import xmp
        if not isinstance(metadata, xmp.XmpInformation):
            metadata = xmp.XmpInformation(metadata)
            self[NameObject("/Metadata")] = metadata
        return metadata

    ##
    # Read-only property that accesses the {@link
    # #DictionaryObject.getXmpData getXmpData} function.
    # <p>
    # Stability: Added in v1.12, will exist for all future v1.x releases.
    xmpMetadata = property(lambda self: self.getXmpMetadata(), None, None)

    def writeToStream(self, stream, encryption_key):
        stream.write("<<\n")
        for key, value in self.items():
            key.writeToStream(stream, encryption_key)
            stream.write(" ")
            value.writeToStream(stream, encryption_key)
            stream.write("\n")
        stream.write(">>")

    def readFromStream(stream, pdf):
        tmp = stream.read(2)
        if tmp != "<<":
            raise utils.PdfReadError, "dictionary read error"
        data = {}
        while True:
            tok = readNonWhitespace(stream)
            if tok == ">":
                stream.read(1)
                break
            stream.seek(-1, 1)
            key = readObject(stream, pdf)
            tok = readNonWhitespace(stream)
            stream.seek(-1, 1)
            value = readObject(stream, pdf)
            if data.has_key(key):
                # multiple definitions of key not permitted
                raise utils.PdfReadError, "multiple definitions in dictionary"
            data[key] = value
        pos = stream.tell()
        s = readNonWhitespace(stream)
        if s == 's' and stream.read(5) == 'tream':
            eol = stream.read(1)
            # odd PDF file output has spaces after 'stream' keyword but before EOL.
            # patch provided by Danial Sandler
            while eol == ' ':
                eol = stream.read(1)
            assert eol in ("\n", "\r")
            if eol == "\r":
                # read \n after
                stream.read(1)
            # this is a stream object, not a dictionary
            assert data.has_key("/Length")
            length = data["/Length"]
            if isinstance(length, IndirectObject):
                t = stream.tell()
                length = pdf.getObject(length)
                stream.seek(t, 0)
            data["__streamdata__"] = stream.read(length)
            e = readNonWhitespace(stream)
            ndstream = stream.read(8)
            if (e + ndstream) != "endstream":
                # (sigh) - the odd PDF file has a length that is too long, so
                # we need to read backwards to find the "endstream" ending.
                # ReportLab (unknown version) generates files with this bug,
                # and Python users into PDF files tend to be our audience.
                # we need to do this to correct the streamdata and chop off
                # an extra character.
                pos = stream.tell()
                stream.seek(-10, 1)
                end = stream.read(9)
                if end == "endstream":
                    # we found it by looking back one character further.
                    data["__streamdata__"] = data["__streamdata__"][:-1]
                else:
                    stream.seek(pos, 0)
                    raise utils.PdfReadError, "Unable to find 'endstream' marker after stream."
        else:
            stream.seek(pos, 0)
        if data.has_key("__streamdata__"):
            return StreamObject.initializeFromDictionary(data)
        else:
            retval = DictionaryObject()
            retval.update(data)
            return retval
    readFromStream = staticmethod(readFromStream)


class StreamObject(DictionaryObject):
    def __init__(self):
        self._data = None
        self.decodedSelf = None

    def writeToStream(self, stream, encryption_key):
        self[NameObject("/Length")] = NumberObject(len(self._data))
        DictionaryObject.writeToStream(self, stream, encryption_key)
        del self["/Length"]
        stream.write("\nstream\n")
        data = self._data
        if encryption_key:
            data = RC4_encrypt(encryption_key, data)
        stream.write(data)
        stream.write("\nendstream")

    def initializeFromDictionary(data):
        if data.has_key("/Filter"):
            retval = EncodedStreamObject()
        else:
            retval = DecodedStreamObject()
        retval._data = data["__streamdata__"]
        del data["__streamdata__"]
        del data["/Length"]
        retval.update(data)
        return retval
    initializeFromDictionary = staticmethod(initializeFromDictionary)

    def flateEncode(self):
        if self.has_key("/Filter"):
            f = self["/Filter"]
            if isinstance(f, ArrayObject):
                f.insert(0, NameObject("/FlateDecode"))
            else:
                newf = ArrayObject()
                newf.append(NameObject("/FlateDecode"))
                newf.append(f)
                f = newf
        else:
            f = NameObject("/FlateDecode")
        retval = EncodedStreamObject()
        retval[NameObject("/Filter")] = f
        retval._data = filters.FlateDecode.encode(self._data)
        return retval


class DecodedStreamObject(StreamObject):
    def getData(self):
        return self._data

    def setData(self, data):
        self._data = data


class EncodedStreamObject(StreamObject):
    def __init__(self):
        self.decodedSelf = None

    def getData(self):
        if self.decodedSelf:
            # cached version of decoded object
            return self.decodedSelf.getData()
        else:
            # create decoded object
            decoded = DecodedStreamObject()
            decoded._data = filters.decodeStreamData(self)
            for key, value in self.items():
                if not key in ("/Length", "/Filter", "/DecodeParms"):
                    decoded[key] = value
            self.decodedSelf = decoded
            return decoded._data

    def setData(self, data):
        raise utils.PdfReadError, "Creating EncodedStreamObject is not currently supported"


class RectangleObject(ArrayObject):
    def __init__(self, arr):
        # must have four points
        assert len(arr) == 4
        # automatically convert arr[x] into NumberObject(arr[x]) if necessary
        ArrayObject.__init__(self, [self.ensureIsNumber(x) for x in arr])

    def ensureIsNumber(self, value):
        if not isinstance(value, (NumberObject, FloatObject)):
            value = FloatObject(value)
        return value

    def __repr__(self):
        return "RectangleObject(%s)" % repr(list(self))

    def getLowerLeft_x(self):
        return self[0]

    def getLowerLeft_y(self):
        return self[1]

    def getUpperRight_x(self):
        return self[2]

    def getUpperRight_y(self):
        return self[3]

    def getUpperLeft_x(self):
        return self.getLowerLeft_x()
    
    def getUpperLeft_y(self):
        return self.getUpperRight_y()

    def getLowerRight_x(self):
        return self.getUpperRight_x()

    def getLowerRight_y(self):
        return self.getLowerLeft_y()

    def getLowerLeft(self):
        return self.getLowerLeft_x(), self.getLowerLeft_y()

    def getLowerRight(self):
        return self.getLowerRight_x(), self.getLowerRight_y()

    def getUpperLeft(self):
        return self.getUpperLeft_x(), self.getUpperLeft_y()

    def getUpperRight(self):
        return self.getUpperRight_x(), self.getUpperRight_y()

    def setLowerLeft(self, value):
        self[0], self[1] = [self.ensureIsNumber(x) for x in value]

    def setLowerRight(self, value):
        self[2], self[1] = [self.ensureIsNumber(x) for x in value]

    def setUpperLeft(self, value):
        self[0], self[3] = [self.ensureIsNumber(x) for x in value]

    def setUpperRight(self, value):
        self[2], self[3] = [self.ensureIsNumber(x) for x in value]

    def getWidth(self):
        return self.getUpperRight_x() - self.getLowerLeft_x()

    def getHeight(self):
        return self.getUpperRight_y() - self.getLowerLeft_x()

    lowerLeft = property(getLowerLeft, setLowerLeft, None, None)
    lowerRight = property(getLowerRight, setLowerRight, None, None)
    upperLeft = property(getUpperLeft, setUpperLeft, None, None)
    upperRight = property(getUpperRight, setUpperRight, None, None)


def encode_pdfdocencoding(unicode_string):
    retval = ''
    for c in unicode_string:
        try:
            retval += chr(_pdfDocEncoding_rev[c])
        except KeyError:
            raise UnicodeEncodeError("pdfdocencoding", c, -1, -1,
                    "does not exist in translation table")
    return retval

def decode_pdfdocencoding(byte_array):
    retval = u''
    for b in byte_array:
        c = _pdfDocEncoding[ord(b)]
        if c == u'\u0000':
            raise UnicodeDecodeError("pdfdocencoding", b, -1, -1,
                    "does not exist in translation table")
        retval += c
    return retval

_pdfDocEncoding = (
  u'\u0000', u'\u0000', u'\u0000', u'\u0000', u'\u0000', u'\u0000', u'\u0000', u'\u0000',
  u'\u0000', u'\u0000', u'\u0000', u'\u0000', u'\u0000', u'\u0000', u'\u0000', u'\u0000',
  u'\u0000', u'\u0000', u'\u0000', u'\u0000', u'\u0000', u'\u0000', u'\u0000', u'\u0000',
  u'\u02d8', u'\u02c7', u'\u02c6', u'\u02d9', u'\u02dd', u'\u02db', u'\u02da', u'\u02dc',
  u'\u0020', u'\u0021', u'\u0022', u'\u0023', u'\u0024', u'\u0025', u'\u0026', u'\u0027',
  u'\u0028', u'\u0029', u'\u002a', u'\u002b', u'\u002c', u'\u002d', u'\u002e', u'\u002f',
  u'\u0030', u'\u0031', u'\u0032', u'\u0033', u'\u0034', u'\u0035', u'\u0036', u'\u0037',
  u'\u0038', u'\u0039', u'\u003a', u'\u003b', u'\u003c', u'\u003d', u'\u003e', u'\u003f',
  u'\u0040', u'\u0041', u'\u0042', u'\u0043', u'\u0044', u'\u0045', u'\u0046', u'\u0047',
  u'\u0048', u'\u0049', u'\u004a', u'\u004b', u'\u004c', u'\u004d', u'\u004e', u'\u004f',
  u'\u0050', u'\u0051', u'\u0052', u'\u0053', u'\u0054', u'\u0055', u'\u0056', u'\u0057',
  u'\u0058', u'\u0059', u'\u005a', u'\u005b', u'\u005c', u'\u005d', u'\u005e', u'\u005f',
  u'\u0060', u'\u0061', u'\u0062', u'\u0063', u'\u0064', u'\u0065', u'\u0066', u'\u0067',
  u'\u0068', u'\u0069', u'\u006a', u'\u006b', u'\u006c', u'\u006d', u'\u006e', u'\u006f',
  u'\u0070', u'\u0071', u'\u0072', u'\u0073', u'\u0074', u'\u0075', u'\u0076', u'\u0077',
  u'\u0078', u'\u0079', u'\u007a', u'\u007b', u'\u007c', u'\u007d', u'\u007e', u'\u0000',
  u'\u2022', u'\u2020', u'\u2021', u'\u2026', u'\u2014', u'\u2013', u'\u0192', u'\u2044',
  u'\u2039', u'\u203a', u'\u2212', u'\u2030', u'\u201e', u'\u201c', u'\u201d', u'\u2018',
  u'\u2019', u'\u201a', u'\u2122', u'\ufb01', u'\ufb02', u'\u0141', u'\u0152', u'\u0160',
  u'\u0178', u'\u017d', u'\u0131', u'\u0142', u'\u0153', u'\u0161', u'\u017e', u'\u0000',
  u'\u20ac', u'\u00a1', u'\u00a2', u'\u00a3', u'\u00a4', u'\u00a5', u'\u00a6', u'\u00a7',
  u'\u00a8', u'\u00a9', u'\u00aa', u'\u00ab', u'\u00ac', u'\u0000', u'\u00ae', u'\u00af',
  u'\u00b0', u'\u00b1', u'\u00b2', u'\u00b3', u'\u00b4', u'\u00b5', u'\u00b6', u'\u00b7',
  u'\u00b8', u'\u00b9', u'\u00ba', u'\u00bb', u'\u00bc', u'\u00bd', u'\u00be', u'\u00bf',
  u'\u00c0', u'\u00c1', u'\u00c2', u'\u00c3', u'\u00c4', u'\u00c5', u'\u00c6', u'\u00c7',
  u'\u00c8', u'\u00c9', u'\u00ca', u'\u00cb', u'\u00cc', u'\u00cd', u'\u00ce', u'\u00cf',
  u'\u00d0', u'\u00d1', u'\u00d2', u'\u00d3', u'\u00d4', u'\u00d5', u'\u00d6', u'\u00d7',
  u'\u00d8', u'\u00d9', u'\u00da', u'\u00db', u'\u00dc', u'\u00dd', u'\u00de', u'\u00df',
  u'\u00e0', u'\u00e1', u'\u00e2', u'\u00e3', u'\u00e4', u'\u00e5', u'\u00e6', u'\u00e7',
  u'\u00e8', u'\u00e9', u'\u00ea', u'\u00eb', u'\u00ec', u'\u00ed', u'\u00ee', u'\u00ef',
  u'\u00f0', u'\u00f1', u'\u00f2', u'\u00f3', u'\u00f4', u'\u00f5', u'\u00f6', u'\u00f7',
  u'\u00f8', u'\u00f9', u'\u00fa', u'\u00fb', u'\u00fc', u'\u00fd', u'\u00fe', u'\u00ff'
)

assert len(_pdfDocEncoding) == 256

_pdfDocEncoding_rev = {}
for i in xrange(256):
    char = _pdfDocEncoding[i]
    if char == u"\u0000":
        continue
    assert char not in _pdfDocEncoding_rev
    _pdfDocEncoding_rev[char] = i