class PDFPasswordIncorrect(PDFEncryptionError): pass
class PDFTypeError(PDFException): pass
class PDFValueError(PDFException): pass
class PDFNotImplementedError(PSException): pass
# some predefined literals and keywords.
LITERAL_OBJSTM = PSLiteralTable.intern('ObjStm')
LITERAL_XREF = PSLiteralTable.intern('XRef')
LITERAL_PAGE = PSLiteralTable.intern('Page')
LITERAL_PAGES = PSLiteralTable.intern('Pages')
LITERAL_CATALOG = PSLiteralTable.intern('Catalog')
LITERAL_CRYPT = PSLiteralTable.intern('Crypt')
LITERAL_FLATE_DECODE = PSLiteralTable.intern('FlateDecode')
LITERAL_LZW_DECODE = PSLiteralTable.intern('LZWDecode')
KEYWORD_R = PSKeywordTable.intern('R')
KEYWORD_OBJ = PSKeywordTable.intern('obj')
KEYWORD_ENDOBJ = PSKeywordTable.intern('endobj')
KEYWORD_STREAM = PSKeywordTable.intern('stream')
KEYWORD_XREF = PSKeywordTable.intern('xref')
KEYWORD_TRAILER = PSKeywordTable.intern('trailer')
KEYWORD_STARTXREF = PSKeywordTable.intern('startxref')
PASSWORD_PADDING = '(\xbfN^Nu\x8aAd\x00NV\xff\xfa\x01\x08..\x00\xb6\xd0h>\x80/\x0c\xa9\xfedSiz'
## PDFObjRef
##
class PDFObjRef:
def __init__(self, doc, objid, _):
if objid == 0:
def __repr__(self):
return "<ColorSpace: %s, ncomponents=%d>" % (self.name, self.ncomponents)
## Constants
##
LITERAL_PDF = PSLiteralTable.intern("PDF")
LITERAL_TEXT = PSLiteralTable.intern("Text")
LITERAL_FONT = PSLiteralTable.intern("Font")
LITERAL_FORM = PSLiteralTable.intern("Form")
LITERAL_IMAGE = PSLiteralTable.intern("Image")
LITERAL_STANDARD_ENCODING = PSLiteralTable.intern("StandardEncoding")
LITERAL_DEVICE_GRAY = PSLiteralTable.intern("DeviceGray")
LITERAL_DEVICE_RGB = PSLiteralTable.intern("DeviceRGB")
LITERAL_DEVICE_CMYK = PSLiteralTable.intern("DeviceCMYK")
KEYWORD_BI = PSKeywordTable.intern("BI")
KEYWORD_ID = PSKeywordTable.intern("ID")
KEYWORD_EI = PSKeywordTable.intern("EI")
MATRIX_IDENTITY = (1, 0, 0, 1, 0, 0)
PREDEFINED_COLORSPACE = dict(
(name, ColorSpace(name, n))
for (name, n) in {
"CalRGB": 3,
"CalGray": 1,
"Lab": 3,
"DeviceRGB": 3,
"DeviceCMYK": 4,
"DeviceGray": 1,
"Separation": 1,
"Indexed": 1,
class PDFContentParser(PSStackParser):
def __init__(self, streams):
self.streams = streams
self.istream = 0
PSStackParser.__init__(self, None)
return
def fillfp(self):
if not self.fp:
if self.istream < len(self.streams):
strm = stream_value(self.streams[self.istream])
self.istream += 1
else:
raise PSEOF('Unexpected EOF, file truncated?')
self.fp = StringIO(strm.get_data())
return
def seek(self, pos):
self.fillfp()
PSStackParser.seek(self, pos)
return
def fillbuf(self):
if self.charpos < len(self.buf): return
while 1:
self.fillfp()
self.bufpos = self.fp.tell()
self.buf = self.fp.read(self.BUFSIZ)
if self.buf: break
self.fp = None
self.charpos = 0
return
def get_inline_data(self, pos, target='EI'):
self.seek(pos)
i = 0
data = ''
while i <= len(target):
self.fillbuf()
if i:
c = self.buf[self.charpos]
data += c
self.charpos += 1
if i >= len(target) and c.isspace():
i += 1
elif c == target[i]:
i += 1
else:
i = 0
else:
try:
j = self.buf.index(target[0], self.charpos)
#print 'found', (0, self.buf[j:j+10])
data += self.buf[self.charpos:j + 1]
self.charpos = j + 1
i = 1
except ValueError:
data += self.buf[self.charpos:]
self.charpos = len(self.buf)
data = data[:-(len(target) + 1)] # strip the last part
data = re.sub(r'(\x0d\x0a|[\x0d\x0a])', '', data)
return (pos, data)
def flush(self):
self.add_results(*self.popall())
return
KEYWORD_BI = PSKeywordTable.intern('BI')
KEYWORD_ID = PSKeywordTable.intern('ID')
KEYWORD_EI = PSKeywordTable.intern('EI')
def do_keyword(self, pos, token):
if token is self.KEYWORD_BI:
# inline image within a content stream
self.start_type(pos, 'inline')
elif token is self.KEYWORD_ID:
try:
(_, objs) = self.end_type('inline')
if len(objs) % 2 != 0:
raise PSTypeError('Invalid dictionary construct: %r' %
objs)
d = dict((literal_name(k), v) for (k, v) in choplist(2, objs))
(pos, data) = self.get_inline_data(pos + len('ID '))
obj = PDFStream(d, data)
self.push((pos, obj))
self.push((pos, self.KEYWORD_EI))
except PSTypeError:
if STRICT: raise
else:
self.push((pos, token))
return
