class PDFSimpleFont(PDFFont):
def __init__(self, descriptor, widths, spec):
# Font encoding is specified either by a name of
# built-in encoding or a dictionary that describes
# the differences.
if "Encoding" in spec:
encoding = resolve1(spec["Encoding"])
else:
encoding = LITERAL_STANDARD_ENCODING
if isinstance(encoding, dict):
name = literal_name(encoding.get("BaseEncoding", LITERAL_STANDARD_ENCODING))
diff = list_value(encoding.get("Differences", None))
self.cid2unicode = EncodingDB.get_encoding(name, diff)
else:
self.cid2unicode = EncodingDB.get_encoding(literal_name(encoding))
self.unicode_map = None
if "ToUnicode" in spec:
strm = stream_value(spec["ToUnicode"])
self.unicode_map = FileUnicodeMap()
CMapParser(self.unicode_map, StringIO(strm.get_data())).run()
PDFFont.__init__(self, descriptor, widths)
return
def to_unichr(self, cid):
if self.unicode_map:
try:
return self.unicode_map.get_unichr(cid)
except KeyError:
pass
try:
return self.cid2unicode[cid]
except KeyError:
raise PDFUnicodeNotDefined(None, cid)
class PDFCIDFont(PDFFont):
def __init__(self, rsrcmgr, spec):
try:
self.basefont = literal_name(spec["BaseFont"])
except KeyError:
if STRICT:
raise PDFFontError("BaseFont is missing")
self.basefont = "unknown"
self.cidsysteminfo = dict_value(spec.get("CIDSystemInfo", {}))
self.cidcoding = "%s-%s" % (
self.cidsysteminfo.get("Registry", "unknown"),
self.cidsysteminfo.get("Ordering", "unknown"),
)
try:
name = literal_name(spec["Encoding"])
except KeyError:
if STRICT:
raise PDFFontError("Encoding is unspecified")
name = "unknown"
try:
self.cmap = CMapDB.get_cmap(name)
except CMapDB.CMapNotFound as e:
if STRICT:
raise PDFFontError(e)
self.cmap = CMap()
try:
descriptor = dict_value(spec["FontDescriptor"])
except KeyError:
if STRICT:
raise PDFFontError("FontDescriptor is missing")
descriptor = {}
ttf = None
if "FontFile2" in descriptor:
self.fontfile = stream_value(descriptor.get("FontFile2"))
ttf = TrueTypeFont(self.basefont, StringIO(self.fontfile.get_data()))
self.unicode_map = None
if "ToUnicode" in spec:
strm = stream_value(spec["ToUnicode"])
self.unicode_map = FileUnicodeMap()
CMapParser(self.unicode_map, StringIO(strm.get_data())).run()
elif self.cidcoding == "Adobe-Identity":
if ttf:
try:
self.unicode_map = ttf.create_unicode_map()
except TrueTypeFont.CMapNotFound:
pass
else:
try:
self.unicode_map = CMapDB.get_unicode_map(self.cidcoding, self.cmap.is_vertical())
except CMapDB.CMapNotFound as e:
pass
self.vertical = self.cmap.is_vertical()
if self.vertical:
# writing mode: vertical
widths = get_widths2(list_value(spec.get("W2", [])))
self.disps = dict((cid, (vx, vy)) for (cid, (_, (vx, vy))) in list(widths.items()))
(vy, w) = spec.get("DW2", [880, -1000])
self.default_disp = (None, vy)
widths = dict((cid, w) for (cid, (w, _)) in list(widths.items()))
default_width = w
else:
# writing mode: horizontal
self.disps = {}
self.default_disp = 0
widths = get_widths(list_value(spec.get("W", [])))
default_width = spec.get("DW", 1000)
PDFFont.__init__(self, descriptor, widths, default_width=default_width)
return
def __repr__(self):
return "<PDFCIDFont: basefont=%r, cidcoding=%r>" % (self.basefont, self.cidcoding)
def is_vertical(self):
return self.vertical
def is_multibyte(self):
return True
def decode(self, bytes):
return self.cmap.decode(bytes)
def char_disp(self, cid):
"Returns an integer for horizontal fonts, a tuple for vertical fonts."
return self.disps.get(cid, self.default_disp)
def to_unichr(self, cid):
try:
if not self.unicode_map:
raise KeyError(cid)
return self.unicode_map.get_unichr(cid)
except KeyError:
raise PDFUnicodeNotDefined(self.cidcoding, cid)
