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#Copyright ReportLab Europe Ltd. 2000-2017
#see license.txt for license details
#history https://hg.reportlab.com/hg-public/reportlab/log/tip/src/reportlab/pdfbase/pdfdoc.py
__version__='3.4.1'
__doc__="""
The module pdfdoc.py handles the 'outer structure' of PDF documents, ensuring that
all objects are properly cross-referenced and indexed to the nearest byte. The
'inner structure' - the page descriptions - are presumed to be generated before
each page is saved.
pdfgen.py calls this and provides a 'canvas' object to handle page marking operators.
piddlePDF calls pdfgen and offers a high-level interface.
The classes within this generally mirror structures in the PDF file
and are not part of any public interface. Instead, canvas and font
classes are made available elsewhere for users to manipulate.
"""
import types, binascii, codecs, time
from collections import OrderedDict
from reportlab.pdfbase import pdfutils
from reportlab import rl_config, ascii
from reportlab.lib.utils import import_zlib, open_for_read, makeFileName, isSeq, isBytes, isUnicode, _digester, isStr, bytestr, isPy3, annotateException, TimeStamp
from reportlab.lib.rl_accel import escapePDF, fp_str, asciiBase85Encode, asciiBase85Decode
from reportlab.pdfbase import pdfmetrics
from hashlib import md5
from sys import platform
from sys import version_info
from sys import stderr
if platform[:4] == 'java' and version_info[:2] == (2, 1):
# workaround for list()-bug in Jython 2.1 (should be fixed in 2.2)
def list(sequence):
def f(x):
return x
return list(map(f, sequence))
class PDFError(Exception):
pass
# __InternalName__ is a special attribute that can only be set by the Document arbitrator
__InternalName__ = "__InternalName__"
# __RefOnly__ marks reference only elements that must be formatted on top level
__RefOnly__ = "__RefOnly__"
# __Comment__ provides a (one line) comment to inline with an object ref, if present
# if it is more than one line then percentize it...
__Comment__ = "__Comment__"
# name for standard font dictionary
BasicFonts = "BasicFonts"
# name for the pages object
Pages = "Pages"
PDF_VERSION_DEFAULT = (1, 3)
PDF_SUPPORT_VERSION = dict( #map keyword to min version that supports it
transparency = (1, 4),
)
if isPy3:
def pdfdocEnc(x):
return x.encode('extpdfdoc') if isinstance(x,str) else x
else:
def pdfdocEnc(x):
return x.encode('extpdfdoc') if isinstance(x,unicode) else x
def format(element, document, toplevel=0):
"""Indirection step for formatting.
Ensures that document parameters alter behaviour
of formatting for all elements.
"""
if isinstance(element,PDFObject):
if not toplevel and hasattr(element, __RefOnly__):
# the object cannot be a component at non top level.
# make a reference to it and return it's format
return document.Reference(element).format(document)
else:
f = element.format(document)
if not rl_config.invariant and rl_config.pdfComments and hasattr(element, __Comment__):
f = pdfdocEnc("%% %s\n" % element.__Comment__)+f
return f
elif type(element) in (float, int):
#use a controlled number formatting routine
#instead of str, so Jython/Python etc do not differ
return pdfdocEnc(fp_str(element))
elif isBytes(element):
return element
elif isUnicode(element):
return pdfdocEnc(element)
else:
return pdfdocEnc(str(element))
def xObjectName(externalname):
return "FormXob.%s" % externalname
# backwards compatibility
formName = xObjectName
# no encryption
class NoEncryption:
def encode(self, t):
"encode a string, stream, text"
return t
def prepare(self, document):
# get ready to do encryption
pass
def register(self, objnum, version):
# enter a new direct object
pass
def info(self):
# the representation of self in file if any (should be None or PDFDict)
return None
class PDFObject(object):
pass
class DummyDoc(PDFObject):
"used to bypass encryption when required"
encrypt = NoEncryption()
### the global document structure manager
class PDFDocument(PDFObject):
# set this to define filters
defaultStreamFilters = None
encrypt = NoEncryption() # default no encryption
def __init__(self,
dummyoutline=0,
compression=rl_config.pageCompression,
invariant=rl_config.invariant,
filename=None,
pdfVersion=PDF_VERSION_DEFAULT,
lang=None,
):
self._ID = None
self.objectcounter = 0
self.shadingCounter = 0
self.inObject = None
self.pageCounter = 1
# allow None value to be passed in to mean 'give system defaults'
if invariant is None:
self.invariant = rl_config.invariant
else:
self.invariant = invariant
self.setCompression(compression)
self._pdfVersion = pdfVersion
# signature for creating PDF ID
sig = self.signature = md5()
sig.update(b"a reportlab document")
self._timeStamp = TimeStamp(self.invariant)
cat = self._timeStamp.t
cat = ascii(cat)
sig.update(bytestr(cat)) # initialize with timestamp digest
# mapping of internal identifier ("Page001") to PDF objectnumber and generation number (34, 0)
self.idToObjectNumberAndVersion = {}
# mapping of internal identifier ("Page001") to PDF object (PDFPage instance)
self.idToObject = {}
# internal id to file location
self.idToOffset = {}
# number to id
self.numberToId = {}
cat = self.Catalog = self._catalog = PDFCatalog()
pages = self.Pages = PDFPages()
cat.Pages = pages
lang = lang if lang else rl_config.documentLang
if lang:
cat.Lang = PDFString(lang)
self.outline = self.Outlines = cat.Outlines = PDFOutlines0() if dummyoutline else PDFOutlines()
self.info = PDFInfo()
#self.Reference(self.Catalog)
#self.Reference(self.Info)
self.fontMapping = {}
#make an empty font dictionary
DD = PDFDictionary({})
DD.__Comment__ = "The standard fonts dictionary"
self.Reference(DD, BasicFonts)
self.delayedFonts = []
def setCompression(self, onoff):
# XXX: maybe this should also set self.defaultStreamFilters?
self.compression = onoff
def ensureMinPdfVersion(self, *keys):
"Ensure that the pdf version is greater than or equal to that specified by the keys"
for k in keys:
self._pdfVersion = max(self._pdfVersion, PDF_SUPPORT_VERSION[k])
def updateSignature(self, thing):
"add information to the signature"
if self._ID: return # but not if its used already!
self.signature.update(bytestr(thing))
def ID(self):
"A unique fingerprint for the file (unless in invariant mode)"
if self._ID:
return self._ID
digest = self.signature.digest()
doc = DummyDoc()
IDs = PDFText(digest,enc='raw').format(doc)
self._ID = (b'\n['+IDs+IDs+b']\n% ReportLab generated PDF document -- digest (http://www.reportlab.com)\n')
return self._ID
def SaveToFile(self, filename, canvas):
if getattr(self,'_savedToFile',False):
raise RuntimeError("class %s instances can only be saved once" % self.__class__.__name__)
self._savedToFile = True
if hasattr(getattr(filename, "write",None),'__call__'):
myfile = 0
f = filename
filename = getattr(f,'name','')
if isinstance(filename,int): filename = '<os fd:%d>'% filename
filename = makeFileName(filename)
else :
myfile = 1
filename = makeFileName(filename)
f = open(filename, "wb")
data = self.GetPDFData(canvas)
if isUnicode(data):
data = data.encode('latin1')
f.write(data)
if myfile:
f.close()
import os
if os.name=='mac':
from reportlab.lib.utils import markfilename
markfilename(filename) # do platform specific file junk
if getattr(canvas,'_verbosity',None): print('saved %s' % (filename,))
def GetPDFData(self, canvas):
# realize delayed fonts
for fnt in self.delayedFonts:
fnt.addObjects(self)
# add info stuff to signature
self.info.invariant = self.invariant
self.info.digest(self.signature)
### later: maybe add more info to sig?
# prepare outline
self.Reference(self.Catalog)
self.Reference(self.info)
self.Outlines.prepare(self, canvas)
if self.Outlines.ready<0:
self.Catalog.Outlines = None
return self.format()
def inPage(self):
"""specify the current object as a page (enables reference binding and other page features)"""
if self.inObject is not None:
if self.inObject=="page": return
raise ValueError("can't go in page already in object %s" % self.inObject)
self.inObject = "page"
def inForm(self):
"""specify that we are in a form xobject (disable page features, etc)"""
# don't need this check anymore since going in a form pushes old context at canvas level.
#if self.inObject not in ["form", None]:
# raise ValueError("can't go in form already in object %s" % self.inObject)
self.inObject = "form"
# don't need to do anything else, I think...
def getInternalFontName(self, psfontname):
fm = self.fontMapping
if psfontname in fm:
return fm[psfontname]
else:
try:
# does pdfmetrics know about it? if so, add
fontObj = pdfmetrics.getFont(psfontname)
if fontObj._dynamicFont:
raise PDFError("getInternalFontName(%s) called for a dynamic font" % repr(psfontname))
fontObj.addObjects(self)
return fm[psfontname]
except KeyError:
raise PDFError("Font %s not known!" % repr(psfontname))
def thisPageName(self):
return "Page"+repr(self.pageCounter)
def thisPageRef(self):
return PDFObjectReference(self.thisPageName())
def addPage(self, page):
name = self.thisPageName()
self.Reference(page, name)
self.Pages.addPage(page)
self.pageCounter += 1
self.inObject = None
def addForm(self, name, form):
"""add a Form XObject."""
# XXX should check that name is a legal PDF name
if self.inObject != "form":
self.inForm()
self.Reference(form, xObjectName(name))
self.inObject = None
def annotationName(self, externalname):
return "Annot.%s"%externalname
def addAnnotation(self, name, annotation):
self.Reference(annotation, self.annotationName(name))
def refAnnotation(self, name):
internalname = self.annotationName(name)
return PDFObjectReference(internalname)
def addShading(self, shading):
name = "Sh%d" % self.shadingCounter
self.Reference(shading, name)
self.shadingCounter += 1
return name
def addColor(self,cmyk):
sname = cmyk.spotName
if not sname:
if cmyk.cyan==0 and cmyk.magenta==0 and cmyk.yellow==0:
sname = 'BLACK'
elif cmyk.black==0 and cmyk.magenta==0 and cmyk.yellow==0:
sname = 'CYAN'
elif cmyk.cyan==0 and cmyk.black==0 and cmyk.yellow==0:
sname = 'MAGENTA'
elif cmyk.cyan==0 and cmyk.magenta==0 and cmyk.black==0:
sname = 'YELLOW'
if not sname:
raise ValueError("CMYK colour %r used without a spotName" % cmyk)
else:
cmyk = cmyk.clone(spotName = sname)
name = PDFName(sname)[1:]
if name not in self.idToObject:
sep = PDFSeparationCMYKColor(cmyk).value() #PDFArray([/Separation /name /DeviceCMYK tint_tf])
self.Reference(sep,name)
return name,sname
def setTitle(self, title):
"embeds in PDF file"
if title is None:
self.info.title = '(anonymous)'
else:
self.info.title = title
def setAuthor(self, author):
"embedded in PDF file"
#allow resetting to clear it
if author is None:
self.info.author = '(anonymous)'
else:
self.info.author = author
def setSubject(self, subject):
"embeds in PDF file"
#allow resetting to clear it
if subject is None:
self.info.subject = '(unspecified)'
else:
self.info.subject = subject
def setCreator(self, creator):
"embeds in PDF file"
if creator is None: #allow resetting to clear it
self.info.creator = '(unspecified)'
else:
self.info.creator = creator
def setProducer(self, producer):
"embeds in PDF file"
if producer is None:
self.info.producer = _default_producer
else:
self.info.producer = producer
def setKeywords(self, keywords):
"embeds a string containing keywords in PDF file"
#allow resetting to clear it but ensure it's a string
if keywords is None:
self.info.keywords = ''
else:
self.info.keywords = keywords
def setDateFormatter(self, dateFormatter):
self.info._dateFormatter = dateFormatter
def getAvailableFonts(self):
fontnames = list(self.fontMapping.keys())
# the standard 14 are also always available! (even if not initialized yet)
from reportlab.pdfbase import _fontdata
for name in _fontdata.standardFonts:
if name not in fontnames:
fontnames.append(name)
fontnames.sort()
return fontnames
def format(self):
# register the Catalog/INfo and then format the objects one by one until exhausted
# (possible infinite loop if there is a bug that continually makes new objects/refs...)
# Prepare encryption
self.encrypt.prepare(self)
cat = self.Catalog
info = self.info
self.Reference(cat)
self.Reference(info)
# register the encryption dictionary if present
encryptref = None
encryptinfo = self.encrypt.info()
if encryptinfo:
encryptref = self.Reference(encryptinfo)
# make std fonts (this could be made optional
counter = 0 # start at first object (object 1 after preincrement)
ids = [] # the collection of object ids in object number order
numbertoid = self.numberToId
idToNV = self.idToObjectNumberAndVersion
idToOb = self.idToObject
idToOf = self.idToOffset
### note that new entries may be "appended" DURING FORMATTING
# __accum__ allows objects to know where they are in the file etc etc
self.__accum__ = File = PDFFile(self._pdfVersion) # output collector
while True:
counter += 1 # do next object...
if counter not in numbertoid: break
oid = numbertoid[counter]
#printidToOb
obj = idToOb[oid]
IO = PDFIndirectObject(oid, obj)
# register object number and version
IOf = IO.format(self)
# add a comment to the PDF output
if not rl_config.invariant and rl_config.pdfComments:
try:
classname = obj.__class__.__name__
except:
classname = ascii(obj)
File.add("%% %s: class %s \n" % (ascii(oid), classname[:50]))
offset = File.add(IOf)
idToOf[oid] = offset
ids.append(oid)
del self.__accum__
# sanity checks (must happen AFTER formatting)
lno = len(numbertoid)
if counter-1!=lno:
raise ValueError("counter %s doesn't match number to id dictionary %s" %(counter, lno))
# now add the xref
xref = PDFCrossReferenceTable()
xref.addsection(0, ids)
xreff = xref.format(self)
xrefoffset = File.add(xreff)
# now add the trailer
trailer = PDFTrailer(
startxref = xrefoffset,
Size = lno+1,
Root = self.Reference(cat),
Info = self.Reference(info),
Encrypt = encryptref,
ID = self.ID(),
)
trailerf = trailer.format(self)
File.add(trailerf)
for ds in getattr(self,'_digiSigs',[]):
ds.sign(File)
# return string format for pdf file
return File.format(self)
def hasForm(self, name):
"""test for existence of named form"""
internalname = xObjectName(name)
return internalname in self.idToObject
def getFormBBox(self, name, boxType="MediaBox"):
"""get the declared bounding box of the form as a list.
If you specify a different PDF box definition (e.g. the
ArtBox) and it has one, that's what you'll get."""
internalname = xObjectName(name)
if internalname in self.idToObject:
theform = self.idToObject[internalname]
if hasattr(theform,'_extra_pageCatcher_info'):
return theform._extra_pageCatcher_info[boxType]
if isinstance(theform, PDFFormXObject):
# internally defined form
return theform.BBoxList()
elif isinstance(theform, PDFStream):
# externally defined form
return list(theform.dictionary.dict[boxType].sequence)
else:
raise ValueError("I don't understand the form instance %s" % repr(name))
def getXObjectName(self, name):
"""Lets canvas find out what form is called internally.
Never mind whether it is defined yet or not."""
return xObjectName(name)
def xobjDict(self, formnames):
"""construct an xobject dict (for inclusion in a resource dict, usually)
from a list of form names (images not yet supported)"""
D = {}
for name in formnames:
internalname = xObjectName(name)
reference = PDFObjectReference(internalname)
D[internalname] = reference
#print "xobjDict D", D
return PDFDictionary(D)
def Reference(self, obj, name=None):
### note references may "grow" during the final formatting pass: don't use d.keys()!
# don't make references to other references, or non instances, unless they are named!
iob = isinstance(obj,PDFObject)
idToObject = self.idToObject
if name is None and (not iob or obj.__class__ is PDFObjectReference):
return obj
if hasattr(obj, __InternalName__):
# already registered
intname = obj.__InternalName__
if name is not None and name!=intname:
raise ValueError("attempt to reregister object %s with new name %s" % (
repr(intname), repr(name)))
if intname not in idToObject:
raise ValueError("object of type %s named as %s, but not registered" % (type(obj),ascii(intname)))
return PDFObjectReference(intname)
# otherwise register the new object
objectcounter = self.objectcounter = self.objectcounter+1
if name is None:
name = "R"+repr(objectcounter)
if name in idToObject:
other = idToObject[name]
if other!=obj:
raise ValueError("redefining named object: "+repr(name))
return PDFObjectReference(name)
if iob:
obj.__InternalName__ = name
#print "name", name, "counter", objectcounter
self.idToObjectNumberAndVersion[name] = (objectcounter, 0)
self.numberToId[objectcounter] = name
idToObject[name] = obj
return PDFObjectReference(name)
### chapter 4 Objects
PDFtrue = "true"
PDFfalse = "false"
PDFnull = "null"
class PDFText(PDFObject):
def __init__(self, t, enc='utf-8'):
self.t = t
self.enc = enc
def format(self, document):
t = self.t
if isUnicode(t):
t = t.encode(self.enc)
result = binascii.hexlify(document.encrypt.encode(t))
return b"<" + result + b">"
def __str__(self):
dummydoc = DummyDoc()
return self.format(dummydoc)
def PDFnumber(n):
return n
import re
_re_cleanparens=re.compile('[^()]')
del re
def _isbalanced(s):
'''test whether a string is balanced in parens'''
s = _re_cleanparens.sub('',s)
n = 0
for c in s:
if c=='(': n+=1
else:
n -= 1
if n<0: return 0
return not n and 1 or 0
def _checkPdfdoc(utext):
'''return true if no Pdfdoc encoding errors'''
try:
utext.encode('pdfdoc')
return 1
except UnicodeEncodeError as e:
return 0
class PDFString(PDFObject):
def __init__(self, s, escape=1, enc='auto'):
'''s can be unicode/utf8 or a PDFString
if escape is true then the output will be passed through escape
if enc is raw then the string will be left alone
if enc is auto we'll try and automatically adapt to utf_16_be/utf_16_le if the
effective string is not entirely in pdfdoc
'''
if isinstance(s,PDFString):
self.s = s.s
self.escape = s.escape
self.enc = s.enc
else:
self.s = s
self.escape = escape
self.enc = enc
def format(self, document):
s = self.s
enc = getattr(self,'enc','auto')
if isBytes(s):
if enc == 'auto':
try:
if s.startswith(codecs.BOM_UTF16_BE):
u = s.decode('utf_16_be')
elif s.startswith(codecs.BOM_UTF16_LE):
u = s.decode('utf_16_le')
else:
u = s.decode('utf8')
if _checkPdfdoc(u):
s = u.encode('pdfdoc')
else:
s = codecs.BOM_UTF16_BE+u.encode('utf_16_be')
except:
try:
s.decode('pdfdoc')
except:
stderr.write('Error in %s' % (repr(s),))
raise
elif isUnicode(s):
if enc == 'auto':
if _checkPdfdoc(s):
s = s.encode('pdfdoc')
else:
s = codecs.BOM_UTF16_BE+s.encode('utf_16_be')
else:
s = codecs.BOM_UTF16_BE+s.encode('utf_16_be')
else:
raise ValueError('PDFString argument must be str/unicode not %s' % type(s))
escape = getattr(self,'escape',1)
if not isinstance(document.encrypt,NoEncryption):
s = document.encrypt.encode(s)
escape = 1
if escape:
try:
es = "(%s)" % escapePDF(s)
except:
raise ValueError("cannot escape %s %s" % (s, repr(s)))
if escape&2:
es = es.replace('\\012','\n')
if escape&4 and _isbalanced(es):
es = es.replace('\\(','(').replace('\\)',')')
return pdfdocEnc(es)
else:
return b'(' + s + b')'
def __str__(self):
return "(%s)" % escapePDF(self.s)
def PDFName(data,lo=chr(0x21),hi=chr(0x7e)):
# might need to change this to class for encryption
# NOTE: RESULT MUST ALWAYS SUPPORT MEANINGFUL COMPARISONS (EQUALITY) AND HASH
# first convert the name
L = list(data)
for i,c in enumerate(L):
if c<lo or c>hi or c in "%()<>{}[]#":
L[i] = "#"+hex(ord(c))[2:] # forget the 0x thing...
return "/"+(''.join(L))
class PDFDictionary(PDFObject):
multiline = True
def __init__(self, dict=None):
"""dict should be namestring to value eg "a": 122 NOT pdfname to value NOT "/a":122"""
if dict is None:
self.dict = {}
else:
self.dict = dict.copy()
def __setitem__(self, name, value):
self.dict[name] = value
def __getitem__(self, a):
return self.dict[a]
def __contains__(self,a):
return a in self.dict
def Reference(self, name, document):
self.dict[name] = document.Reference(self.dict[name])
def format(self, document,IND=b'\n '):
dict = self.dict
try:
keys = list(dict.keys())
except:
print(ascii(dict))
raise
if not isinstance(dict,OrderedDict): keys.sort()
L = [(format(PDFName(k),document)+b" "+format(dict[k],document)) for k in keys]
if (self.multiline and rl_config.pdfMultiLine) or self.multiline=='forced':
L = IND.join(L)
else:
# break up every 6 elements anyway
t=L.insert
for i in reversed(range(6, len(L), 6)):
t(i,b'\n ')
L = b" ".join(L)
return b'<<\n'+L+b'\n>>'
def copy(self):
return PDFDictionary(self.dict)
def normalize(self):
#normalize the names to use RL standard ie Name not /Name
D = self.dict
K = [k for k in D.keys() if k.startswith('/')]
for k in K:
D[k[1:]] = D.pop(k)
class checkPDFNames:
def __init__(self,*names):
self.names = list(map(PDFName,names))
def __call__(self,value):
if not value.startswith('/'):
value=PDFName(value)
if value in self.names:
return value
def checkPDFBoolean(value):
if value in ('true','false'): return value
class CheckedPDFDictionary(PDFDictionary):
validate = {}
def __init__(self,dict=None,validate=None):
PDFDictionary.__init__(self,dict)
if validate: self.validate = validate
def __setitem__(self,name,value):
if name not in self.validate:
raise ValueError('invalid key, %r' % name)
cvalue = self.validate[name](value)
if cvalue is None:
raise ValueError('Bad value %r for key %r' % (value,name))
PDFDictionary.__setitem__(self,name,cvalue)
class ViewerPreferencesPDFDictionary(CheckedPDFDictionary):
validate=dict(
HideToolbar=checkPDFBoolean,
HideMenubar=checkPDFBoolean,
HideWindowUI=checkPDFBoolean,
FitWindow=checkPDFBoolean,
CenterWindow=checkPDFBoolean,
DisplayDocTitle=checkPDFBoolean, #contributed by mark Erbaugh
NonFullScreenPageMode=checkPDFNames(*'UseNone UseOutlines UseThumbs UseOC'.split()),
Direction=checkPDFNames(*'L2R R2L'.split()),
ViewArea=checkPDFNames(*'MediaBox CropBox BleedBox TrimBox ArtBox'.split()),
ViewClip=checkPDFNames(*'MediaBox CropBox BleedBox TrimBox ArtBox'.split()),
PrintArea=checkPDFNames(*'MediaBox CropBox BleedBox TrimBox ArtBox'.split()),
PrintClip=checkPDFNames(*'MediaBox CropBox BleedBox TrimBox ArtBox'.split()),
PrintScaling=checkPDFNames(*'None AppDefault'.split()),
)
# stream filters are objects to support round trip and
# possibly in the future also support parameters
class PDFStreamFilterZCompress:
pdfname = "FlateDecode"
def encode(self, text):
from reportlab.lib.utils import import_zlib
zlib = import_zlib()
if not zlib: raise ImportError("cannot z-compress zlib unavailable")
if isUnicode(text):
text = text.encode('utf8')
return zlib.compress(text)
def decode(self, encoded):
from reportlab.lib.utils import import_zlib
zlib = import_zlib()
if not zlib: raise ImportError("cannot z-decompress zlib unavailable")
return zlib.decompress(encoded)
# need only one of these, unless we implement parameters later
PDFZCompress = PDFStreamFilterZCompress()
class PDFStreamFilterBase85Encode:
pdfname = "ASCII85Decode"
def encode(self, text):
from reportlab.pdfbase.pdfutils import _wrap
text = asciiBase85Encode(text)
if rl_config.wrapA85:
text = _wrap(text)
return text
def decode(self, text):
return asciiBase85Decode(text)
# need only one of these too
PDFBase85Encode = PDFStreamFilterBase85Encode()
class PDFStream(PDFObject):
'''set dictionary elements explicitly stream.dictionary[name]=value'''
### compression stuff not implemented yet
__RefOnly__ = 1 # must be at top level
def __init__(self, dictionary=None, content=None, filters=None):
if dictionary is None:
dictionary = PDFDictionary()
self.dictionary = dictionary
self.content = content
self.filters = filters
def format(self, document):
dictionary = self.dictionary
# copy it for modification
dictionary = PDFDictionary(dictionary.dict.copy())
content = self.content
filters = self.filters
if self.content is None:
raise ValueError("stream content not set")
if filters is None:
filters = document.defaultStreamFilters
# only apply filters if they haven't been applied elsewhere
if filters is not None and "Filter" not in dictionary.dict:
# apply filters in reverse order listed
rf = list(filters)
rf.reverse()
fnames = []
for f in rf:
#print "*****************content:"; print repr(content[:200])
#print "*****************filter", f.pdfname
content = f.encode(content)
fnames.insert(0, PDFName(f.pdfname))
#print "*****************finally:"; print content[:200]
#print "****** FILTERS", fnames
#stop
dictionary["Filter"] = PDFArray(fnames)
# "stream encoding is done after all filters have been applied"
content = document.encrypt.encode(content)
fc = format(content, document)
dictionary["Length"] = len(content)
fd = format(dictionary, document)
return fd+b'\nstream\n'+fc+b'endstream\n'
def teststream(content=None):
#content = "" # test
if content is None:
content = teststreamcontent
content = content.strip() + '\n'
S = PDFStream(content = content,
filters=rl_config.useA85 and [PDFBase85Encode,PDFZCompress] or [PDFZCompress])
# nothing else needed...
S.__Comment__ = "test stream"
return S
teststreamcontent = """
1 0 0 1 0 0 cm BT /F9 12 Tf 14.4 TL ET
1.00 0.00 1.00 rg
n 72.00 72.00 432.00 648.00 re B*
"""
class PDFArray(PDFObject):
multiline = True
def __init__(self, sequence):
self.sequence = list(sequence)
def References(self, document):
"""make all objects in sequence references"""
self.sequence = list(map(document.Reference, self.sequence))
def format(self, document, IND=b'\n '):
L = [format(e, document) for e in self.sequence]
if (self.multiline and rl_config.pdfMultiLine) or self.multiline=='forced':
L = IND.join(L)
else:
n=len(L)
if n>10:
# break up every 10 elements anyway
t=L.insert
for i in reversed(range(10, n, 10)):
t(i,b'\n ')
L = b' '.join(L)
else:
L = b' '.join(L)
return b'[ ' + L + b' ]'
class PDFArrayCompact(PDFArray):
multiline=False
class PDFIndirectObject(PDFObject):
__RefOnly__ = 1
def __init__(self, name, content):
self.name = name
self.content = content
def format(self, document):
name = self.name
n, v = document.idToObjectNumberAndVersion[name]
# set encryption parameters
document.encrypt.register(n, v)
fcontent = format(self.content, document, toplevel=1) # yes this is at top level
return (pdfdocEnc("%s %s obj\n"%(n,v))
+fcontent+ (b'' if fcontent.endswith(b'\n') else b'\n')
+b'endobj\n')
class PDFObjectReference(PDFObject):
def __init__(self, name):
self.name = name
def format(self, document):
try:
return pdfdocEnc("%s %s R" % document.idToObjectNumberAndVersion[self.name])
except:
raise KeyError("forward reference to %s not resolved upon final formatting" % repr(self.name))
class PDFFile(PDFObject):
### just accumulates strings: keeps track of current offset
def __init__(self,pdfVersion=PDF_VERSION_DEFAULT):
self.strings = []
self.write = self.strings.append
self.offset = 0
### chapter 5
# Following Ken Lunde's advice and the PDF spec, this includes
# some high-order bytes. I chose the characters for Tokyo
# in Shift-JIS encoding, as these cannot be mistaken for
# any other encoding, and we'll be able to tell if something
# has run our PDF files through a dodgy Unicode conversion.
self.add((pdfdocEnc("%%PDF-%s.%s" % pdfVersion) +
b'\n%\223\214\213\236 ReportLab Generated PDF document http://www.reportlab.com\n'
))
def closeOrReset(self):
pass
def add(self, s):
"""should be constructed as late as possible, return position where placed"""
s = pdfdocEnc(s)
result = self.offset
self.offset = result+len(s)
self.write(s)
return result
def format(self, document):
return b''.join(self.strings)
class PDFCrossReferenceSubsection(PDFObject):
def __init__(self, firstentrynumber, idsequence):
self.firstentrynumber = firstentrynumber
self.idsequence = idsequence
def format(self, document):
"""id sequence should represent contiguous object nums else error. free numbers not supported (yet)"""
firstentrynumber = self.firstentrynumber
idsequence = self.idsequence
entries = list(idsequence)
nentries = len(idsequence)
# special case: object number 0 is always free
taken = {}
if firstentrynumber==0:
taken[0] = "standard free entry"
nentries = nentries+1
entries.insert(0, "0000000000 65535 f ")
idToNV = document.idToObjectNumberAndVersion
idToOffset = document.idToOffset
lastentrynumber = firstentrynumber+nentries-1
for id in idsequence:
(num, version) = idToNV[id]
if num in taken:
raise ValueError("object number collision %s %s %s" % (num, repr(id), repr(taken[id])))
if num>lastentrynumber or num<firstentrynumber:
raise ValueError("object number %s not in range %s..%s" % (num, firstentrynumber, lastentrynumber))
# compute position in list
rnum = num-firstentrynumber
taken[num] = id
offset = idToOffset[id]
entries[num] = '%0.10d %0.5d n ' % (offset, version)
# now add the initial line
firstline = "%s %s" % (firstentrynumber, nentries)
entries.insert(0, firstline)
# make sure it ends with \n
entries.append("")
return pdfdocEnc('\n'.join(entries))
class PDFCrossReferenceTable(PDFObject):
def __init__(self):
self.sections = []
def addsection(self, firstentry, ids):
section = PDFCrossReferenceSubsection(firstentry, ids)
self.sections.append(section)
def format(self, document):
sections = self.sections
if not sections:
raise ValueError("no crossref sections")
L = [b"xref\n"]
for s in self.sections:
fs = format(s, document)
L.append(fs)
return pdfdocEnc(b''.join(L))
class PDFTrailer(PDFObject):
def __init__(self, startxref, Size=None, Prev=None, Root=None, Info=None, ID=None, Encrypt=None):
self.startxref = startxref
if Size is None or Root is None:
raise ValueError("Size and Root keys required")
dict = self.dict = PDFDictionary()
for (n,v) in [("Size", Size), ("Prev", Prev), ("Root", Root),
("Info", Info), ("ID", ID), ("Encrypt", Encrypt)]:
if v is not None:
dict[n] = v
dict.multiline='forced'
def format(self, document):
fdict = self.dict.format(document,IND=b'\n')
return b''.join([
b'trailer\n',
fdict,
b'\nstartxref\n',
pdfdocEnc(str(self.startxref)),
b'\n%%EOF\n',
]
)
#### XXXX skipping incremental update,
#### encryption
#### chapter 6, doc structure
class PDFCatalog(PDFObject):
__Comment__ = "Document Root"
__RefOnly__ = 1
# to override, set as attributes
__Defaults__ = {"Type": PDFName("Catalog"),
"PageMode": PDFName("UseNone"),
"Lang": None,
}
__NoDefault__ = """
Dests Outlines Pages Threads AcroForm Names OpenAction PageMode URI
ViewerPreferences PageLabels PageLayout JavaScript StructTreeRoot SpiderInfo""".split()
__Refs__ = __NoDefault__
def format(self, document):
self.check_format(document)
defaults = self.__Defaults__
Refs = self.__Refs__
D = {}
for k,v in defaults.items():
v = getattr(self,k,v)
if v is not None:
D[k] = v
for k in self.__NoDefault__:
v = getattr(self,k,None)
if v is not None:
D[k] = v
# force objects to be references where required
for k in Refs:
if k in D:
#print"k is", k, "value", D[k]
D[k] = document.Reference(D[k])
dict = PDFDictionary(D)
return format(dict, document)
def showOutline(self):
self.setPageMode("UseOutlines")
def showFullScreen(self):
self.setPageMode("FullScreen")
def setPageLayout(self,layout):
if layout:
self.PageLayout = PDFName(layout)
def setPageMode(self,mode):
if mode:
self.PageMode = PDFName(mode)
def check_format(self, document):
"""for use in subclasses"""
pass
class PDFPages(PDFCatalog):
"""PAGES TREE WITH ONE INTERNAL NODE, FOR "BALANCING" CHANGE IMPLEMENTATION"""
__Comment__ = "page tree"
__RefOnly__ = 1
# note: could implement page attribute inheritance...
__Defaults__ = {"Type": PDFName("Pages"),
}
__NoDefault__ = "Kids Count Parent".split()
__Refs__ = ["Parent"]
def __init__(self):
self.pages = []
def __getitem__(self, item):
return self.pages[item]
def addPage(self, page):
self.pages.append(page)
def check_format(self, document):
# convert all pages to page references
pages = self.pages
kids = PDFArray(pages)
# make sure all pages are references
kids.References(document)
self.Kids = kids
self.Count = len(pages)
class PDFPage(PDFCatalog):
__Comment__ = "Page dictionary"
# all PDF attributes can be set explicitly
# if this flag is set, the "usual" behavior will be suppressed
Override_default_compilation = 0
__RefOnly__ = 1
__Defaults__ = {"Type": PDFName("Page"),
# "Parent": PDFObjectReference(Pages), # no! use document.Pages
}
__NoDefault__ = """Parent
MediaBox Resources Contents CropBox Rotate Thumb Annots B Dur Hid Trans AA
PieceInfo LastModified SeparationInfo ArtBox TrimBox BleedBox ID PZ
Trans""".split()
__Refs__ = """Contents Parent ID""".split()
pagewidth = 595
pageheight = 842
stream = None
hasImages = 0
compression = 0
XObjects = None
_colorsUsed = {}
_shadingsUsed = {}
Trans = None
# transitionstring?
# xobjects?
# annotations
def __init__(self):
# set all nodefaults to None
for name in self.__NoDefault__:
setattr(self, name, None)
def setCompression(self, onoff):
self.compression = onoff
def setStream(self, code):
if self.Override_default_compilation:
raise ValueError("overridden! must set stream explicitly")
if isSeq(code):
code = '\n'.join(code)+'\n'
self.stream = code
def setPageTransition(self, tranDict):
self.Trans = PDFDictionary(tranDict)
def check_format(self, document):
# set up parameters unless usual behaviour is suppressed
if self.Override_default_compilation:
return
self.MediaBox = self.MediaBox or PDFArray(self.Rotate in (90,270) and [0,0,self.pageheight,self.pagewidth] or [0, 0, self.pagewidth, self.pageheight])
if not self.Annots:
self.Annots = None
else:
#print self.Annots
#raise ValueError("annotations not reimplemented yet")
if not isinstance(self.Annots,PDFObject):
self.Annots = PDFArray(self.Annots)
if not self.Contents:
stream = self.stream
if not stream:
self.Contents = teststream()
else:
S = PDFStream()
if self.compression:
S.filters = rl_config.useA85 and [PDFBase85Encode, PDFZCompress] or [PDFZCompress]
S.content = stream
S.__Comment__ = "page stream"
self.Contents = S
if not self.Resources:
resources = PDFResourceDictionary()
# fonts!
resources.basicFonts()
if self.hasImages:
resources.allProcs()
else:
resources.basicProcs()
if self.XObjects:
#print "XObjects", self.XObjects.dict
resources.XObject = self.XObjects
if self.ExtGState:
resources.ExtGState = self.ExtGState
resources.setShading(self._shadingUsed)
resources.setColorSpace(self._colorsUsed)
self.Resources = resources
if not self.Parent:
pages = document.Pages
self.Parent = document.Reference(pages)
#this code contributed by Christian Jacobs <cljacobsen@gmail.com>
class DuplicatePageLabelPage(Exception):
pass
class PDFPageLabels(PDFCatalog):
__comment__ = None
__RefOnly__ = 0
__Defaults__ = {}
__NoDefault__ = ["Nums"]
__Refs__ = []
def __init__(self):
self.labels = []
def addPageLabel(self, page, label):
""" Adds a new PDFPageLabel to this catalog.
The 'page' argument, an integer, is the page number in the PDF document
with which the 'label' should be associated. Page numbering in the PDF
starts at zero! Thus, to change the label on the first page, '0' should be
provided as an argument, and to change the 6th page, '5' should be provided
as the argument.
The 'label' argument should be a PDFPageLabel instance, which describes the
format of the labels starting on page 'page' in the PDF and continuing
until the next encounter of a PDFPageLabel.
The order in which labels are added is not important.
"""
self.labels.append((page, label))
def format(self, document):
try:
self.labels.sort()
except DuplicatePageLabelPage:
tmp = sorted([x[0] for x in self.labels])
annotateException('\n\n!!!!! Duplicate PageLabel seen for pages %r' % list(set([x for x in tmp if tmp.count(x)>1])))
labels = []
for page, label in self.labels:
labels.append(page)
labels.append(label)
self.Nums = PDFArray(labels) #PDFArray makes a copy with list()
return PDFCatalog.format(self, document)
class PDFPageLabel(PDFCatalog):
__Comment__ = None
__RefOnly__ = 0
__Defaults__ = {}
__NoDefault__ = "Type S P St".split()
__convertible__ = 'ARABIC ROMAN_UPPER ROMAN_LOWER LETTERS_UPPER LETTERS_LOWER'
ARABIC = 'D'
ROMAN_UPPER = 'R'
ROMAN_LOWER = 'r'
LETTERS_UPPER = 'A'
LETTERS_LOWER = 'a'
def __init__(self, style=None, start=None, prefix=None):
"""
A PDFPageLabel changes the style of page numbering as displayed in a PDF
viewer. PDF page labels have nothing to do with 'physical' page numbers
printed on a canvas, but instead influence the 'logical' page numbers
displayed by PDF viewers. However, when using roman numerals (i, ii,
iii...) or page prefixes for appendecies (A.1, A.2...) on the physical
pages PDF page labels are necessary to change the logical page numbers
displayed by the PDF viewer to match up with the physical numbers. A
PDFPageLabel changes the properties of numbering at the page on which it
appears (see the class 'PDFPageLabels' for specifying where a PDFPageLabel
is associated) and all subsequent pages, until a new PDFPageLabel is
encountered.
The arguments to this initialiser determine the properties of all
subsequent page labels. 'style' determines the numberings style, arabic,
roman, letters; 'start' specifies the starting number; and 'prefix' any
prefix to be applied to the page numbers. All these arguments can be left
out or set to None.
* style:
- None: No numbering, can be used to display the prefix only.
- PDFPageLabel.ARABIC: Use arabic numbers: 1, 2, 3, 4...
- PDFPageLabel.ROMAN_UPPER: Use upper case roman numerals: I, II, III...
- PDFPageLabel.ROMAN_LOWER: Use lower case roman numerals: i, ii, iii...
- PDFPageLabel.LETTERS_UPPER: Use upper case letters: A, B, C, D...
- PDFPageLabel.LETTERS_LOWER: Use lower case letters: a, b, c, d...
* start:
- An integer specifying the starting number for this PDFPageLabel. This
can be used when numbering style changes to reset the page number back
to one, ie from roman to arabic, or from arabic to appendecies. Can be
any positive integer or None. I'm not sure what the effect of
specifying None is, probably that page numbering continues with the
current sequence, I'd have to check the spec to clarify though.
* prefix:
- A string which is prefixed to the page numbers. Can be used to display
appendecies in the format: A.1, A.2, ..., B.1, B.2, ... where a
PDFPageLabel is used to set the properties for the first page of each
appendix to restart the page numbering at one and set the prefix to the
appropriate letter for current appendix. The prefix can also be used to
display text only, if the 'style' is set to None. This can be used to
display strings such as 'Front', 'Back', or 'Cover' for the covers on
books.
"""
if style:
if style.upper() in self.__convertible__: style = getattr(self,style.upper())
self.S = PDFName(style)
if start: self.St = PDFnumber(start)
if prefix: self.P = PDFString(prefix)
def __lt__(self,oth):
if rl_config.errorOnDuplicatePageLabelPage:
raise DuplicatePageLabelPage()
return False
#ends code contributed by Christian Jacobs <cljacobsen@gmail.com>
def testpage(document):
P = PDFPage()
P.Contents = teststream()
pages = document.Pages
P.Parent = document.Reference(pages)
P.MediaBox = PDFArray([0, 0, 595, 841])
resources = PDFResourceDictionary()
resources.allProcs() # enable all procsets
resources.basicFonts()
P.Resources = resources
pages.addPage(P)
#### DUMMY OUTLINES IMPLEMENTATION FOR testing
DUMMYOUTLINE = """
<<
/Count
0
/Type
/Outlines
>>"""
class PDFOutlines0(PDFObject):
__Comment__ = "TEST OUTLINE!"
text = DUMMYOUTLINE.replace("\n", '\n')
__RefOnly__ = 1
def format(self, document):
return pdfdocEnc(self.text)
class OutlineEntryObject(PDFObject):
"an entry in an outline"
Title = Dest = Parent = Prev = Next = First = Last = Count = None
def format(self, document):
D = {}
D["Title"] = PDFString(self.Title)
D["Parent"] = self.Parent
D["Dest"] = self.Dest
for n in ("Prev", "Next", "First", "Last", "Count"):
v = getattr(self, n)
if v is not None:
D[n] = v
PD = PDFDictionary(D)
return PD.format(document)
class PDFOutlines(PDFObject):
"""
takes a recursive list of outline destinations like::
out = PDFOutline1()
out.setNames(canvas, # requires canvas for name resolution
"chapter1dest",
("chapter2dest",
["chapter2section1dest",
"chapter2section2dest",
"chapter2conclusiondest"]
), # end of chapter2 description
"chapter3dest",
("chapter4dest", ["c4s1", "c4s2"])
)
Higher layers may build this structure incrementally. KISS at base level.
"""
# first attempt, many possible features missing.
#no init for now
mydestinations = ready = None
counter = 0
currentlevel = -1 # ie, no levels yet
def __init__(self):
self.destinationnamestotitles = {}
self.destinationstotitles = {}
self.levelstack = []
self.buildtree = []
self.closedict = {} # dictionary of "closed" destinations in the outline
def addOutlineEntry(self, destinationname, level=0, title=None, closed=None):
"""destinationname of None means "close the tree" """
if destinationname is None and level!=0:
raise ValueError("close tree must have level of 0")
if not isinstance(level,int): raise ValueError("level must be integer, got %s" % type(level))
if level<0: raise ValueError("negative levels not allowed")
if title is None: title = destinationname
currentlevel = self.currentlevel
stack = self.levelstack
tree = self.buildtree
# adjust currentlevel and stack to match level
if level>currentlevel:
if level>currentlevel+1:
raise ValueError("can't jump from outline level %s to level %s, need intermediates (destinationname=%r, title=%r)" %(currentlevel, level, destinationname, title))
level = currentlevel = currentlevel+1
stack.append([])
while level<currentlevel:
# pop off levels to match
current = stack[-1]
del stack[-1]
previous = stack[-1]
lastinprevious = previous[-1]
if isinstance(lastinprevious,tuple):
(name, sectionlist) = lastinprevious
raise ValueError("cannot reset existing sections: " + repr(lastinprevious))
else:
name = lastinprevious
sectionlist = current
previous[-1] = (name, sectionlist)
#sectionlist.append(current)
currentlevel = currentlevel-1
if destinationname is None: return
stack[-1].append(destinationname)
self.destinationnamestotitles[destinationname] = title
if closed: self.closedict[destinationname] = 1
self.currentlevel = level
def setDestinations(self, destinationtree):
self.mydestinations = destinationtree
def format(self, document):
#this should never be called if None in (self.first,self.last)
D = {}
D["Type"] = PDFName("Outlines")
D["Count"] = self.count
D["First"] = self.first
D["Last"] = self.last
PD = PDFDictionary(D)
return PD.format(document)
def setNames(self, canvas, *nametree):
desttree = self.translateNames(canvas, nametree)
self.setDestinations(desttree)
def setNameList(self, canvas, nametree):
"Explicit list so I don't need to do in the caller"
desttree = self.translateNames(canvas, nametree)
self.setDestinations(desttree)
def translateNames(self, canvas, object):
"recursively translate tree of names into tree of destinations"
destinationnamestotitles = self.destinationnamestotitles
destinationstotitles = self.destinationstotitles
closedict = self.closedict
if isStr(object):
if not isUnicode(object): object = object.decode('utf8')
destination = canvas._bookmarkReference(object)
title = object
if object in destinationnamestotitles:
title = destinationnamestotitles[object]
else:
destinationnamestotitles[title] = title
destinationstotitles[destination] = title
if object in closedict:
closedict[destination] = 1 # mark destination closed
return {object: canvas._bookmarkReference(object)} # name-->ref
if isSeq(object):
L = []
for o in object:
L.append(self.translateNames(canvas, o))
if isinstance(object,tuple):
return tuple(L)
return L
# bug contributed by Benjamin Dumke <reportlab@benjamin-dumke.de>
raise TypeError("in outline, destination name must be string: got a %s"%type(object))
def prepare(self, document, canvas):
"""prepare all data structures required for save operation (create related objects)"""
if self.mydestinations is None:
if self.levelstack:
self.addOutlineEntry(None) # close the tree
destnames = self.levelstack[0]
#from pprint import pprint; pprint(destnames); stop
self.mydestinations = self.translateNames(canvas, destnames)
else:
self.first = self.last = None
self.count = 0
self.ready = -1
return
#self.first = document.objectReference("Outline.First")
#self.last = document.objectReference("Outline.Last")
# XXXX this needs to be generalized for closed entries!
self.count = count(self.mydestinations, self.closedict)
(self.first, self.last) = self.maketree(document, self.mydestinations, toplevel=1)
self.ready = 1
def maketree(self, document, destinationtree, Parent=None, toplevel=0):
if toplevel:
levelname = "Outline"
Parent = document.Reference(document.Outlines)
else:
self.count += 1
levelname = "Outline.%s" % self.count
if Parent is None:
raise ValueError("non-top level outline elt parent must be specified")
if not isSeq(destinationtree):
raise ValueError("destinationtree must be list or tuple, got %s")
nelts = len(destinationtree)
lastindex = nelts-1
lastelt = firstref = lastref = None
destinationnamestotitles = self.destinationnamestotitles
closedict = self.closedict
for index in range(nelts):
eltobj = OutlineEntryObject()
eltobj.Parent = Parent
eltname = "%s.%s" % (levelname, index)
eltref = document.Reference(eltobj, eltname)
#document.add(eltname, eltobj)
if lastelt is not None:
lastelt.Next = eltref
eltobj.Prev = lastref
if firstref is None:
firstref = eltref
lastref = eltref
lastelt = eltobj # advance eltobj
lastref = eltref
elt = destinationtree[index]
if isinstance(elt,dict):
# simple leaf {name: dest}
leafdict = elt
elif isinstance(elt,tuple):
# leaf with subsections: ({name: ref}, subsections) XXXX should clean up (see count(...))
try:
(leafdict, subsections) = elt
except:
raise ValueError("destination tree elt tuple should have two elts, got %s" % len(elt))
eltobj.Count = count(subsections, closedict)
(eltobj.First, eltobj.Last) = self.maketree(document, subsections, eltref)
else:
raise ValueError("destination tree elt should be dict or tuple, got %s" % type(elt))
try:
[(Title, Dest)] = list(leafdict.items())
except:
raise ValueError("bad outline leaf dictionary, should have one entry "+bytestr(elt))
eltobj.Title = destinationnamestotitles[Title]
eltobj.Dest = Dest
if isinstance(elt,tuple) and Dest in closedict:
# closed subsection, count should be negative
eltobj.Count = -eltobj.Count
return (firstref, lastref)
def count(tree, closedict=None):
"""utility for outline: recursively count leaves in a tuple/list tree"""
from operator import add
if isinstance(tree,tuple):
# leaf with subsections XXXX should clean up this structural usage
(leafdict, subsections) = tree
[(Title, Dest)] = list(leafdict.items())
if closedict and Dest in closedict:
return 1 # closed tree element
if isSeq(tree):
#return reduce(add, map(count, tree))
counts = []
for e in tree:
counts.append(count(e, closedict))
return sum(counts) #used to be: return reduce(add, counts)
return 1
_default_producer = "ReportLab PDF Library - www.reportlab.com"
class PDFInfo(PDFObject):
"""PDF documents can have basic information embedded, viewable from
File | Document Info in Acrobat Reader. If this is wrong, you get
Postscript errors while printing, even though it does not print."""
producer = _default_producer
creator = "ReportLab PDF Library - www.reportlab.com"
title = "untitled"
author = "anonymous"
subject = "unspecified"
keywords = ""
_dateFormatter = None
def __init__(self):
self.trapped = 'False' #could be 'True' or 'Unknown'
def digest(self, md5object):
# add self information to signature
for x in (self.title, self.author, self.subject, self.keywords):
md5object.update(bytestr(x))
def format(self, document):
D = {}
D["Title"] = PDFString(self.title)
D["Author"] = PDFString(self.author)
D['ModDate'] = D["CreationDate"] = PDFDate(ts=document._timeStamp,dateFormatter=self._dateFormatter)
D["Producer"] = PDFString(self.producer)
D["Creator"] = PDFString(self.creator)
D["Subject"] = PDFString(self.subject)
D["Keywords"] = PDFString(self.keywords)
D["Trapped"] = PDFName(self.trapped)
PD = PDFDictionary(D)
return PD.format(document)
def copy(self):
"shallow copy - useful in pagecatchering"
thing = self.__klass__()
for k, v in self.__dict__.items():
setattr(thing, k, v)
return thing
# skipping thumbnails, etc
class Annotation(PDFObject):
"""superclass for all annotations."""
defaults = [("Type", PDFName("Annot"),)]
required = ("Type", "Rect", "Contents", "Subtype")
permitted = required+(
"Border", "C", "T", "M", "F", "H", "BS", "AA", "AS", "Popup", "P", "AP")
def cvtdict(self, d, escape=1):
"""transform dict args from python form to pdf string rep as needed"""
Rect = d["Rect"]
if not isStr(Rect):
d["Rect"] = PDFArray(Rect)
d["Contents"] = PDFString(d["Contents"],escape)
return d
def AnnotationDict(self, **kw):
if 'escape' in kw:
escape = kw['escape']
del kw['escape']
else:
escape = 1
d = {}
for (name,val) in self.defaults:
d[name] = val
d.update(kw)
for name in self.required:
if name not in d:
raise ValueError("keyword argument %s missing" % name)
d = self.cvtdict(d,escape=escape)
permitted = self.permitted
for name in d.keys():
if name not in permitted:
raise ValueError("bad annotation dictionary name %s" % name)
return PDFDictionary(d)
def Dict(self):
raise ValueError("DictString undefined for virtual superclass Annotation, must overload")
# but usually
#return self.AnnotationDict(self, Rect=(a,b,c,d)) or whatever
def format(self, document):
D = self.Dict()
return D.format(document)
class TextAnnotation(Annotation):
permitted = Annotation.permitted + (
"Open", "Name")
def __init__(self, Rect, Contents, **kw):
self.Rect = Rect
self.Contents = Contents
self.otherkw = kw
def Dict(self):
d = {}
d.update(self.otherkw)
d["Rect"] = self.Rect
d["Contents"] = self.Contents
d["Subtype"] = "/Text"
return self.AnnotationDict(**d)
class FreeTextAnnotation(Annotation):
permitted = Annotation.permitted + ("DA",)
def __init__(self, Rect, Contents, DA, **kw):
self.Rect = Rect
self.Contents = Contents
self.DA = DA
self.otherkw = kw
def Dict(self):
d = {}
d.update(self.otherkw)
d["Rect"] = self.Rect
d["Contents"] = self.Contents
d["DA"] = self.DA
d["Subtype"] = "/FreeText"
return self.AnnotationDict(**d)
class LinkAnnotation(Annotation):
permitted = Annotation.permitted + (
"Dest", "A", "PA")
def __init__(self, Rect, Contents, Destination, Border="[0 0 1]", **kw):
self.Border = Border
self.Rect = Rect
self.Contents = Contents
self.Destination = Destination
self.otherkw = kw
def dummyDictString(self): # old, testing
return """
<< /Type /Annot /Subtype /Link /Rect [71 717 190 734] /Border [16 16 1]
/Dest [23 0 R /Fit] >>
"""
def Dict(self):
d = {}
d.update(self.otherkw)
d["Border"] = self.Border
d["Rect"] = self.Rect
d["Contents"] = self.Contents
d["Subtype"] = "/Link"
d["Dest"] = self.Destination
return self.AnnotationDict(**d)
class HighlightAnnotation(Annotation):
"""
HighlightAnnotation is an annotation that highlights the selected area.
Rect is the mouseover area that will show the contents.
QuadPoints is a list of points to highlight, you can have many groups of
four QuadPoints to allow highlighting many lines.
"""
permitted = Annotation.permitted + ("QuadPoints", )
def __init__(self, Rect, Contents, QuadPoints, Color=[0.83, 0.89, 0.95], **kw):
self.Rect = Rect
self.Contents = Contents
self.otherkw = kw
self.QuadPoints = QuadPoints
self.Color = Color
def cvtdict(self, d, escape=1):
"""transform dict args from python form to pdf string rep as needed"""
Rect = d["Rect"]
Quad = d["QuadPoints"]
Color = d["C"]
if not isinstance(Rect, str):
d["Rect"] = PDFArray(Rect).format(d, IND=b" ")
if not isinstance(Quad, str):
d["QuadPoints"] = PDFArray(Quad).format(d, IND=b" ")
if not isinstance(Color, str):
d["C"] = PDFArray(Color).format(d, IND=b" ")
d["Contents"] = PDFString(d["Contents"], escape)
return d
def Dict(self):
d = {}
d.update(self.otherkw)
d["Rect"] = self.Rect
d["Contents"] = self.Contents
d["Subtype"] = "/Highlight"
d["QuadPoints"] = self.QuadPoints
d["C"] = self.Color
return self.AnnotationDict(**d)
def rect_to_quad(Rect):
"""
Utility method to convert a Rect to a QuadPoint
"""
return [Rect[0], Rect[1], Rect[2], Rect[1],
Rect[0], Rect[3], Rect[2], Rect[3]]
# skipping names tree
# skipping actions
# skipping names trees
# skipping to chapter 7
class PDFRectangle(PDFObject):
def __init__(self, llx, lly, urx, ury):
self.llx, self.lly, self.ulx, self.ury = llx, lly, urx, ury
def format(self, document):
A = PDFArray([self.llx, self.lly, self.ulx, self.ury])
return format(A, document)
class PDFDate(PDFObject):
# gmt offset now suppported properly
def __init__(self, ts=None, dateFormatter=None):
if ts is None:
ts = TimeStamp()
self._init(ts)
self.dateFormatter = dateFormatter
def _init(self,ts):
self.date = ts.YMDhms
self.dhh = ts.dhh
self.dmm = ts.dmm
def format(self, doc):
dfmt = self.dateFormatter or (
lambda yyyy,mm,dd,hh,m,s:
"D:%04d%02d%02d%02d%02d%02d%+03d'%02d'"
% (yyyy,mm,dd,hh,m,s,self.dhh,self.dmm))
return format(PDFString(dfmt(*self.date)), doc)
class Destination(PDFObject):
"""
not a PDFObject! This is a placeholder that can delegates
to a pdf object only after it has been defined by the methods
below.
EG a Destination can refer to Appendix A before it has been
defined, but only if Appendix A is explicitly noted as a destination
and resolved before the document is generated...
For example the following sequence causes resolution before doc generation.
d = Destination()
d.fit() # or other format defining method call
d.setPage(p)
(at present setPageRef is called on generation of the page).
"""
representation = format = page = None
def __init__(self,name):
self.name = name
self.fmt = self.page = None
def format(self, document):
f = self.fmt
if f is None: raise ValueError("format not resolved, probably missing URL scheme or undefined destination target for '%s'" % self.name)
p = self.page
if p is None: raise ValueError("Page not bound, probably missing URL scheme or undefined destination target for '%s'" % self.name)
f.page = p
return f.format(document)
def xyz(self, left, top, zoom): # see pdfspec mar 11 99 pp184+
self.fmt = PDFDestinationXYZ(None, left, top, zoom)
def fit(self):
self.fmt = PDFDestinationFit(None)
def fitb(self):
self.fmt = PDFDestinationFitB(None)
def fith(self, top):
self.fmt = PDFDestinationFitH(None,top)
def fitv(self, left):
self.fmt = PDFDestinationFitV(None, left)
def fitbh(self, top):
self.fmt = PDFDestinationFitBH(None, top)
def fitbv(self, left):
self.fmt = PDFDestinationFitBV(None, left)
def fitr(self, left, bottom, right, top):
self.fmt = PDFDestinationFitR(None, left, bottom, right, top)
def setPage(self, page):
self.page = page
#self.fmt.page = page # may not yet be defined!
class PDFDestinationXYZ(PDFObject):
typename = "XYZ"
def __init__(self, page, left, top, zoom):
self.page = page
self.top = top
self.zoom = zoom
self.left = left
def format(self, document):
pageref = document.Reference(self.page)
A = PDFArray( [ pageref, PDFName(self.typename), self.left, self.top, self.zoom ] )
return format(A, document)
class PDFDestinationFit(PDFObject):
typename = "Fit"
def __init__(self, page):
self.page = page
def format(self, document):
pageref = document.Reference(self.page)
A = PDFArray( [ pageref, PDFName(self.typename) ] )
return format(A, document)
class PDFDestinationFitB(PDFDestinationFit):
typename = "FitB"
class PDFDestinationFitH(PDFObject):
typename = "FitH"
def __init__(self, page, top):
self.page = page; self.top=top
def format(self, document):
pageref = document.Reference(self.page)
A = PDFArray( [ pageref, PDFName(self.typename), self.top ] )
return format(A, document)
class PDFDestinationFitBH(PDFDestinationFitH):
typename = "FitBH"
class PDFDestinationFitV(PDFObject):
typename = "FitV"
def __init__(self, page, left):
self.page = page; self.left=left
def format(self, document):
pageref = document.Reference(self.page)
A = PDFArray( [ pageref, PDFName(self.typename), self.left ] )
return format(A, document)
class PDFDestinationFitBV(PDFDestinationFitV):
typename = "FitBV"
class PDFDestinationFitR(PDFObject):
typename = "FitR"
def __init__(self, page, left, bottom, right, top):
self.page = page; self.left=left; self.bottom=bottom; self.right=right; self.top=top
def format(self, document):
pageref = document.Reference(self.page)
A = PDFArray( [ pageref, PDFName(self.typename), self.left, self.bottom, self.right, self.top] )
return format(A, document)
# named destinations need nothing
# skipping filespecs
class PDFResourceDictionary(PDFObject):
"""each element *could* be reset to a reference if desired"""
def __init__(self,**kwds):
for _ in self.dict_attributes:
setattr(self,_,kwds.pop(_,{}))
# define the basicprocs
self.basicProcs()
if 'ProcSet' in kwds:
self.ProcSet= kwds.pop('ProcSet')
stdprocs = [PDFName(s) for s in "PDF Text ImageB ImageC ImageI".split()]
dict_attributes = ("ColorSpace", "XObject", "ExtGState", "Font", "Pattern", "Properties", "Shading")
def allProcs(self):
# define all standard procsets
self.ProcSet = self.stdprocs
def basicProcs(self):
self.ProcSet = self.stdprocs[:2] # just PDF and Text
def basicFonts(self):
self.Font = PDFObjectReference(BasicFonts)
def setColorSpace(self,colorsUsed):
for c,s in colorsUsed.items():
self.ColorSpace[s] = PDFObjectReference(c)
def setShading(self,shadingUsed):
for c,s in shadingUsed.items():
self.Shading[s] = PDFObjectReference(c)
def format(self, document):
D = {}
for dname in self.dict_attributes:
v = getattr(self, dname)
if isinstance(v,dict):
if v:
dv = PDFDictionary(v)
D[dname] = dv
else:
D[dname] = v
v = self.ProcSet
dname = "ProcSet"
if isSeq(v):
if v:
dv = PDFArray(v)
D[dname] = dv
else:
D[dname] = v
DD = PDFDictionary(D)
return format(DD, document)
##############################################################################
#
# Font objects - the PDFDocument.addFont() method knows which of these
# to construct when given a user-facing Font object
#
##############################################################################
class PDFType1Font(PDFObject):
"""no init: set attributes explicitly"""
__RefOnly__ = 1
# note! /Name appears to be an undocumented attribute....
name_attributes = "Type Subtype BaseFont Name".split()
Type = "Font"
Subtype = "Type1"
# these attributes are assumed to already be of the right type
local_attributes = "FirstChar LastChar Widths Encoding ToUnicode FontDescriptor".split()
def format(self, document):
D = {}
for name in self.name_attributes:
if hasattr(self, name):
value = getattr(self, name)
D[name] = PDFName(value)
for name in self.local_attributes:
if hasattr(self, name):
value = getattr(self, name)
D[name] = value
#print D
PD = PDFDictionary(D)
return PD.format(document)
## These attribute listings will be useful in future, even if we
## put them elsewhere
class PDFTrueTypeFont(PDFType1Font):
Subtype = "TrueType"
#local_attributes = "FirstChar LastChar Widths Encoding ToUnicode FontDescriptor".split() #same
##class PDFMMType1Font(PDFType1Font):
## Subtype = "MMType1"
##
##class PDFType3Font(PDFType1Font):
## Subtype = "Type3"
## local_attributes = "FirstChar LastChar Widths CharProcs FontBBox FontMatrix Resources Encoding".split()
##
##class PDFType0Font(PDFType1Font):
## Subtype = "Type0"
## local_attributes = "DescendantFonts Encoding".split(
##
##class PDFCIDFontType0(PDFType1Font):
## Subtype = "CIDFontType0"
## local_attributes = "CIDSystemInfo FontDescriptor DW W DW2 W2 Registry Ordering Supplement".split()
##
##class PDFCIDFontType0(PDFType1Font):
## Subtype = "CIDFontType2"
## local_attributes = "BaseFont CIDToGIDMap CIDSystemInfo FontDescriptor DW W DW2 W2".split()
##
##class PDFEncoding(PDFType1Font):
## Type = "Encoding"
## name_attributes = "Type BaseEncoding".split()
## # these attributes are assumed to already be of the right type
## local_attributes = ["Differences"]
##
# UGLY ALERT - this needs turning into something O-O, it was hacked
# across from the pdfmetrics.Encoding class to avoid circularity
# skipping CMaps
class PDFFormXObject(PDFObject):
# like page requires .info set by some higher level (doc)
# XXXX any resource used in a form must be propagated up to the page that (recursively) uses
# the form!! (not implemented yet).
XObjects = Annots = BBox = Matrix = Contents = stream = Resources = None
hasImages = 1 # probably should change
compression = 0
def __init__(self, lowerx, lowery, upperx, uppery):
#not done
self.lowerx = lowerx; self.lowery=lowery; self.upperx=upperx; self.uppery=uppery
def setStreamList(self, data):
if isSeq(data):
data = '\n'.join(data)
self.stream = pdfdocEnc(data)
def BBoxList(self):
"get the declared bounding box for the form as a list"
if self.BBox:
return list(self.BBox.sequence)
else:
return [self.lowerx, self.lowery, self.upperx, self.uppery]
def format(self, document):
self.BBox = self.BBox or PDFArray([self.lowerx, self.lowery, self.upperx, self.uppery])
self.Matrix = self.Matrix or PDFArray([1, 0, 0, 1, 0, 0])
if not self.Annots:
self.Annots = None
else:
#these must be transferred to the page when the form is used
raise ValueError("annotations don't work in PDFFormXObjects yet")
if not self.Contents:
stream = self.stream
if not stream:
self.Contents = teststream()
else:
S = PDFStream()
S.content = stream
# need to add filter stuff (?)
S.__Comment__ = "xobject form stream"
self.Contents = S
if not self.Resources:
resources = PDFResourceDictionary()
# fonts!
resources.basicFonts()
if self.hasImages:
resources.allProcs()
else:
resources.basicProcs()
if self.XObjects:
#print "XObjects", self.XObjects.dict
resources.XObject = self.XObjects
self.Resources=resources
if self.compression:
self.Contents.filters = rl_config.useA85 and [PDFBase85Encode, PDFZCompress] or [PDFZCompress]
sdict = self.Contents.dictionary
sdict["Type"] = PDFName("XObject")
sdict["Subtype"] = PDFName("Form")
sdict["FormType"] = 1
sdict["BBox"] = self.BBox
sdict["Matrix"] = self.Matrix
sdict["Resources"] = self.Resources
return self.Contents.format(document)
class PDFPostScriptXObject(PDFObject):
"For embedding PD (e.g. tray commands) in PDF"
def __init__(self, content=None):
self.content = content
def format(self, document):
S = PDFStream()
S.content = self.content
S.__Comment__ = "xobject postscript stream"
sdict = S.dictionary
sdict["Type"] = PDFName("XObject")
sdict["Subtype"] = PDFName("PS")
return S.format(document)
_mode2CS={'RGB':'DeviceRGB', 'L':'DeviceGray', 'CMYK':'DeviceCMYK'}
class PDFImageXObject(PDFObject):
# first attempts at a hard-coded one
# in the file, Image XObjects are stream objects. We already
# have a PDFStream object with 3 attributes: dictionary, content
# and filters. So the job of this thing is to construct the
# right PDFStream instance and ask it to format itself.
def __init__(self, name, source=None, mask=None):
self.name = name
self.width = 24
self.height = 23
self.bitsPerComponent = 1
self.colorSpace = 'DeviceGray'
self._filters = rl_config.useA85 and ('ASCII85Decode',) or ()
self.streamContent = """
003B00 002700 002480 0E4940 114920 14B220 3CB650
75FE88 17FF8C 175F14 1C07E2 3803C4 703182 F8EDFC
B2BBC2 BB6F84 31BFC2 18EA3C 0E3E00 07FC00 03F800
1E1800 1FF800>
"""
self.mask = mask
if source is None:
pass # use the canned one.
elif hasattr(source,'jpeg_fh'):
self.loadImageFromSRC(source) #it is already a PIL Image
else:
# it is a filename
import os
ext = os.path.splitext(source)[1].lower()
src = open_for_read(source)
try:
if not(ext in ('.jpg', '.jpeg') and self.loadImageFromJPEG(src)):
if rl_config.useA85:
self.loadImageFromA85(src)
else:
self.loadImageFromRaw(src)
finally:
src.close()
def loadImageFromA85(self,source):
IMG=[]
imagedata = pdfutils.makeA85Image(source,IMG=IMG,detectJpeg=True)
if not imagedata:
return self.loadImageFromSRC(IMG[0])
imagedata = [s.strip() for s in imagedata]
words = imagedata[1].split()
self.width, self.height = (int(words[1]),int(words[3]))
self.colorSpace = {'/RGB':'DeviceRGB', '/G':'DeviceGray', '/CMYK':'DeviceCMYK'}[words[7]]
self.bitsPerComponent = 8
self._filters = 'ASCII85Decode','FlateDecode' #'A85','Fl'
if IMG: self._checkTransparency(IMG[0])
elif self.mask=='auto': self.mask = None
self.streamContent = ''.join(imagedata[3:-1])
def loadImageFromJPEG(self,imageFile):
try:
try:
info = pdfutils.readJPEGInfo(imageFile)
finally:
imageFile.seek(0) #reset file pointer
except:
return False
self.width, self.height = info[0], info[1]
self.bitsPerComponent = 8
if info[2] == 1:
self.colorSpace = 'DeviceGray'
elif info[2] == 3:
self.colorSpace = 'DeviceRGB'
else: #maybe should generate an error, is this right for CMYK?
self.colorSpace = 'DeviceCMYK'
self._dotrans = 1
self.streamContent = imageFile.read()
if rl_config.useA85:
self.streamContent = asciiBase85Encode(self.streamContent)
self._filters = 'ASCII85Decode','DCTDecode' #'A85','DCT'
else:
self._filters = 'DCTDecode', #'DCT'
self.mask = None
return True
def loadImageFromRaw(self,source):
IMG=[]
imagedata = pdfutils.makeRawImage(source,IMG=IMG,detectJpeg=True)
if not imagedata:
return self.loadImageFromSRC(IMG[0])
words = imagedata[1].split()
self.width = int(words[1])
self.height = int(words[3])
self.colorSpace = {'/RGB':'DeviceRGB', '/G':'DeviceGray', '/CMYK':'DeviceCMYK'}[words[7]]
self.bitsPerComponent = 8
self._filters = 'FlateDecode', #'Fl'
if IMG: self._checkTransparency(IMG[0])
elif self.mask=='auto': self.mask = None
self.streamContent = b''.join(imagedata[3:-1])
def _checkTransparency(self,im):
if self.mask=='auto':
if im._dataA:
self.mask = None
self._smask = PDFImageXObject(_digester(im._dataA.getRGBData()),im._dataA,mask=None)
self._smask._decode = [0,1]
else:
tc = im.getTransparent()
if tc:
self.mask = (tc[0], tc[0], tc[1], tc[1], tc[2], tc[2])
else:
self.mask = None
elif hasattr(self.mask,'rgb'):
_ = self.mask.rgb()
self.mask = _[0],_[0],_[1],_[1],_[2],_[2]
def loadImageFromSRC(self, im):
"Extracts the stream, width and height"
fp = im.jpeg_fh()
if fp:
self.loadImageFromJPEG(fp)
else:
zlib = import_zlib()
if not zlib: return
self.width, self.height = im.getSize()
raw = im.getRGBData()
#assert len(raw) == self.width*self.height, "Wrong amount of data for image expected %sx%s=%s got %s" % (self.width,self.height,self.width*self.height,len(raw))
self.streamContent = zlib.compress(raw)
if rl_config.useA85:
self.streamContent = asciiBase85Encode(self.streamContent)
self._filters = 'ASCII85Decode','FlateDecode' #'A85','Fl'
else:
self._filters = 'FlateDecode', #'Fl'
self.colorSpace= _mode2CS[im.mode]
self.bitsPerComponent = 8
self._checkTransparency(im)
def format(self, document):
S = PDFStream(content = self.streamContent)
dict = S.dictionary
dict["Type"] = PDFName("XObject")
dict["Subtype"] = PDFName("Image")
dict["Width"] = self.width
dict["Height"] = self.height
dict["BitsPerComponent"] = self.bitsPerComponent
dict["ColorSpace"] = PDFName(self.colorSpace)
if self.colorSpace=='DeviceCMYK' and getattr(self,'_dotrans',0):
dict["Decode"] = PDFArray([1,0,1,0,1,0,1,0])
elif getattr(self,'_decode',None):
dict["Decode"] = PDFArray(self._decode)
dict["Filter"] = PDFArray(map(PDFName,self._filters))
dict["Length"] = len(self.streamContent)
if self.mask: dict["Mask"] = PDFArray(self.mask)
if getattr(self,'smask',None): dict["SMask"] = self.smask
return S.format(document)
class PDFSeparationCMYKColor:
def __init__(self, cmyk):
from reportlab.lib.colors import CMYKColor
if not isinstance(cmyk,CMYKColor):
raise ValueError('%s needs a CMYKColor argument' % self.__class__.__name__)
elif not cmyk.spotName:
raise ValueError('%s needs a CMYKColor argument with a spotName' % self.__class__.__name__)
self.cmyk = cmyk
def _makeFuncPS(self):
'''create the postscript code for the tint transfer function
effectively this is tint*c, tint*y, ... tint*k'''
R = [].append
for i,v in enumerate(self.cmyk.cmyk()):
v=float(v)
if i==3:
if v==0.0:
R('pop')
R('0.0')
else:
R(str(v))
R('mul')
else:
if v==0:
R('0.0')
else:
R('dup')
R(str(v))
R('mul')
R('exch')
return '{%s}' % (' '.join(R.__self__))
def value(self):
return PDFArrayCompact((
PDFName('Separation'),
PDFName(self.cmyk.spotName),
PDFName('DeviceCMYK'),
PDFStream(
dictionary=PDFDictionary(dict(
FunctionType=4,
Domain=PDFArrayCompact((0,1)),
Range=PDFArrayCompact((0,1,0,1,0,1,0,1))
)),
content=self._makeFuncPS(),
filters=None,#[PDFBase85Encode, PDFZCompress],
)
))
class PDFFunction(PDFObject):
"""superclass for all function types."""
defaults = []
required = ("FunctionType", "Domain")
permitted = required+("Range",)
def FunctionDict(self, **kw):
d = {}
for (name,val) in self.defaults:
d[name] = val
d.update(kw)
for name in self.required:
if name not in d:
raise ValueError("keyword argument %s missing" % name)
permitted = self.permitted
for name in d.keys():
if name not in permitted:
raise ValueError("bad annotation dictionary name %s" % name)
return PDFDictionary(d)
def Dict(self, document):
raise ValueError("Dict undefined for virtual superclass PDFShading, must overload")
# but usually
#return self.FunctionDict(self, ...)
def format(self, document):
D = self.Dict(document)
return D.format(document)
class PDFExponentialFunction(PDFFunction):
defaults = PDFFunction.defaults + [("Domain", PDFArrayCompact((0.0, 1.0)))]
required = PDFFunction.required + ("N",)
permitted = PDFFunction.permitted + ("C0", "C1", "N")
def __init__(self, C0, C1, N, **kw):
self.C0 = C0
self.C1 = C1
self.N = N
self.otherkw = kw
def Dict(self, document):
d = {}
d.update(self.otherkw)
d["FunctionType"] = 2
d["C0"] = PDFArrayCompact(self.C0)
d["C1"] = PDFArrayCompact(self.C1)
d["N"] = self.N
return self.FunctionDict(**d)
class PDFStitchingFunction(PDFFunction):
required = PDFFunction.required + ("Functions", "Bounds", "Encode")
permitted = PDFFunction.permitted + ("Functions", "Bounds", "Encode")
def __init__(self, Functions, Bounds, Encode, **kw):
self.Functions = Functions
self.Bounds = Bounds
self.Encode = Encode
self.otherkw = kw
def Dict(self, document):
d = {}
d.update(self.otherkw)
d["FunctionType"] = 3
d["Functions"] = PDFArray([document.Reference(x) for x in self.Functions])
d["Bounds"] = PDFArray(self.Bounds)
d["Encode"] = PDFArray(self.Encode)
return self.FunctionDict(**d)
class PDFShading(PDFObject):
"""superclass for all shading types."""
required = ("ShadingType", "ColorSpace")
permitted = required+("Background", "BBox", "AntiAlias")
def ShadingDict(self, **kw):
d = {}
d.update(kw)
for name in self.required:
if name not in d:
raise ValueError("keyword argument %s missing" % name)
permitted = self.permitted
for name in d.keys():
if name not in permitted:
raise ValueError("bad annotation dictionary name %s" % name)
return PDFDictionary(d)
def Dict(self, document):
raise ValueError("Dict undefined for virtual superclass PDFShading, must overload")
# but usually
#return self.ShadingDict(self, ...)
def format(self, document):
D = self.Dict(document)
return D.format(document)
class PDFFunctionShading(PDFShading):
required = PDFShading.required + ("Function",)
permitted = PDFShading.permitted + ("Domain", "Matrix", "Function")
def __init__(self, Function, ColorSpace, **kw):
self.Function = Function
self.ColorSpace = ColorSpace
self.otherkw = kw
def Dict(self, document):
d = {}
d.update(self.otherkw)
d["ShadingType"] = 1
d["ColorSpace"] = PDFName(self.ColorSpace)
d["Function"] = document.Reference(self.Function)
return self.ShadingDict(**d)
class PDFAxialShading(PDFShading):
required = PDFShading.required + ("Coords", "Function")
permitted = PDFShading.permitted + (
"Coords", "Domain", "Function", "Extend")
def __init__(self, x0, y0, x1, y1, Function, ColorSpace, **kw):
self.Coords = (x0, y0, x1, y1)
self.Function = Function
self.ColorSpace = ColorSpace
self.otherkw = kw
def Dict(self, document):
d = {}
d.update(self.otherkw)
d["ShadingType"] = 2
d["ColorSpace"] = PDFName(self.ColorSpace)
d["Coords"] = PDFArrayCompact(self.Coords)
d["Function"] = document.Reference(self.Function)
return self.ShadingDict(**d)
class PDFRadialShading(PDFShading):
required = PDFShading.required + ("Coords", "Function")
permitted = PDFShading.permitted + (
"Coords", "Domain", "Function", "Extend")
def __init__(self, x0, y0, r0, x1, y1, r1, Function, ColorSpace, **kw):
self.Coords = (x0, y0, r0, x1, y1, r1)
self.Function = Function
self.ColorSpace = ColorSpace
self.otherkw = kw
def Dict(self, document):
d = {}
d.update(self.otherkw)
d["ShadingType"] = 3
d["ColorSpace"] = PDFName(self.ColorSpace)
d["Coords"] = PDFArrayCompact(self.Coords)
d["Function"] = document.Reference(self.Function)
return self.ShadingDict(**d)
if __name__=="__main__":
print("There is no script interpretation for pdfdoc.")