fonttools/Lib/fontTools/cffLib.py

"""cffLib.py -- read/write tools for Adobe CFF fonts."""

from __future__ import print_function, division, absolute_import
from fontTools.misc.py23 import *
from fontTools.misc import sstruct
from fontTools.misc import psCharStrings
from fontTools.misc.textTools import safeEval
import struct
import logging


# mute cffLib debug messages when running ttx in verbose mode
DEBUG = logging.DEBUG - 1
log = logging.getLogger(__name__)


cffHeaderFormat = """
	major:   B
	minor:   B
	hdrSize: B
	offSize: B
"""

class CFFFontSet(object):

	def __init__(self):
		pass

	def decompile(self, file, otFont):
		sstruct.unpack(cffHeaderFormat, file.read(4), self)
		assert self.major == 1 and self.minor == 0, \
				"unknown CFF format: %d.%d" % (self.major, self.minor)

		file.seek(self.hdrSize)
		self.fontNames = list(Index(file))
		self.topDictIndex = TopDictIndex(file)
		self.strings = IndexedStrings(file)
		self.GlobalSubrs = GlobalSubrsIndex(file)
		self.topDictIndex.strings = self.strings
		self.topDictIndex.GlobalSubrs = self.GlobalSubrs

	def __len__(self):
		return len(self.fontNames)

	def keys(self):
		return list(self.fontNames)

	def values(self):
		return self.topDictIndex

	def __getitem__(self, name):
		try:
			index = self.fontNames.index(name)
		except ValueError:
			raise KeyError(name)
		return self.topDictIndex[index]

	def compile(self, file, otFont):
		strings = IndexedStrings()
		writer = CFFWriter()
		writer.add(sstruct.pack(cffHeaderFormat, self))
		fontNames = Index()
		for name in self.fontNames:
			fontNames.append(name)
		writer.add(fontNames.getCompiler(strings, None))
		topCompiler = self.topDictIndex.getCompiler(strings, None)
		writer.add(topCompiler)
		writer.add(strings.getCompiler())
		writer.add(self.GlobalSubrs.getCompiler(strings, None))

		for topDict in self.topDictIndex:
			if not hasattr(topDict, "charset") or topDict.charset is None:
				charset = otFont.getGlyphOrder()
				topDict.charset = charset

		for child in topCompiler.getChildren(strings):
			writer.add(child)

		writer.toFile(file)

	def toXML(self, xmlWriter, progress=None):
		xmlWriter.simpletag("major", value=self.major)
		xmlWriter.newline()
		xmlWriter.simpletag("minor", value=self.minor)
		xmlWriter.newline()
		for fontName in self.fontNames:
			xmlWriter.begintag("CFFFont", name=tostr(fontName))
			xmlWriter.newline()
			font = self[fontName]
			font.toXML(xmlWriter, progress)
			xmlWriter.endtag("CFFFont")
			xmlWriter.newline()
		xmlWriter.newline()
		xmlWriter.begintag("GlobalSubrs")
		xmlWriter.newline()
		self.GlobalSubrs.toXML(xmlWriter, progress)
		xmlWriter.endtag("GlobalSubrs")
		xmlWriter.newline()

	def fromXML(self, name, attrs, content):
		if not hasattr(self, "GlobalSubrs"):
			self.GlobalSubrs = GlobalSubrsIndex()
			self.major = 1
			self.minor = 0
			self.hdrSize = 4
			self.offSize = 4  # XXX ??
		if name == "CFFFont":
			if not hasattr(self, "fontNames"):
				self.fontNames = []
				self.topDictIndex = TopDictIndex()
			fontName = attrs["name"]
			topDict = TopDict(GlobalSubrs=self.GlobalSubrs)
			topDict.charset = None  # gets filled in later
			self.fontNames.append(fontName)
			self.topDictIndex.append(topDict)
			for element in content:
				if isinstance(element, basestring):
					continue
				name, attrs, content = element
				topDict.fromXML(name, attrs, content)
		elif name == "GlobalSubrs":
			for element in content:
				if isinstance(element, basestring):
					continue
				name, attrs, content = element
				subr = psCharStrings.T2CharString()
				subr.fromXML(name, attrs, content)
				self.GlobalSubrs.append(subr)


class CFFWriter(object):

	def __init__(self):
		self.data = []

	def add(self, table):
		self.data.append(table)

	def toFile(self, file):
		lastPosList = None
		count = 1
		while True:
			log.log(DEBUG, "CFFWriter.toFile() iteration: %d", count)
			count = count + 1
			pos = 0
			posList = [pos]
			for item in self.data:
				if hasattr(item, "getDataLength"):
					endPos = pos + item.getDataLength()
				else:
					endPos = pos + len(item)
				if hasattr(item, "setPos"):
					item.setPos(pos, endPos)
				pos = endPos
				posList.append(pos)
			if posList == lastPosList:
				break
			lastPosList = posList
		log.log(DEBUG, "CFFWriter.toFile() writing to file.")
		begin = file.tell()
		posList = [0]
		cffOffSize = calcOffSize(lastPosList[-1])
		headerBytes = self.data[0]
		headerBytes = headerBytes[:-1] + chr(cffOffSize)
		self.data[0] = headerBytes
		for item in self.data:
			if hasattr(item, "toFile"):
				item.toFile(file)
			else:
				file.write(item)
			posList.append(file.tell() - begin)
		assert posList == lastPosList


def calcOffSize(largestOffset):
	if largestOffset < 0x100:
		offSize = 1
	elif largestOffset < 0x10000:
		offSize = 2
	elif largestOffset < 0x1000000:
		offSize = 3
	else:
		offSize = 4
	return offSize


class IndexCompiler(object):

	def __init__(self, items, strings, parent):
		self.items = self.getItems(items, strings)
		self.parent = parent

	def getItems(self, items, strings):
		return items

	def getOffsets(self):
		# An empty INDEX contains only the count field.
		if self.items:
			pos = 1
			offsets = [pos]
			for item in self.items:
				if hasattr(item, "getDataLength"):
					pos = pos + item.getDataLength()
				else:
					pos = pos + len(item)
				offsets.append(pos)
		else:
			offsets = []
		return offsets

	def getDataLength(self):
		if self.items:
			lastOffset = self.getOffsets()[-1]
			offSize = calcOffSize(lastOffset)
			dataLength = (
				2 +                                # count
				1 +                                # offSize
				(len(self.items) + 1) * offSize +  # the offsets
				lastOffset - 1                     # size of object data
			)
		else:
			dataLength = 2  # count. For empty INDEX tables, this is the only entry.

		return dataLength

	def toFile(self, file):
		offsets = self.getOffsets()
		writeCard16(file, len(self.items))
		# An empty INDEX contains only the count field.
		if self.items:
			offSize = calcOffSize(offsets[-1])
			writeCard8(file, offSize)
			offSize = -offSize
			pack = struct.pack
			for offset in offsets:
				binOffset = pack(">l", offset)[offSize:]
				assert len(binOffset) == -offSize
				file.write(binOffset)
			for item in self.items:
				if hasattr(item, "toFile"):
					item.toFile(file)
				else:
					file.write(tobytes(item, encoding="latin1"))


class IndexedStringsCompiler(IndexCompiler):

	def getItems(self, items, strings):
		return items.strings


class TopDictIndexCompiler(IndexCompiler):

	def getItems(self, items, strings):
		out = []
		for item in items:
			out.append(item.getCompiler(strings, self))
		return out

	def getChildren(self, strings):
		children = []
		for topDict in self.items:
			children.extend(topDict.getChildren(strings))
		return children


class FDArrayIndexCompiler(IndexCompiler):

	def getItems(self, items, strings):
		out = []
		for item in items:
			out.append(item.getCompiler(strings, self))
		return out

	def getChildren(self, strings):
		children = []
		for fontDict in self.items:
			children.extend(fontDict.getChildren(strings))
		return children

	def toFile(self, file):
		offsets = self.getOffsets()
		writeCard16(file, len(self.items))
		offSize = calcOffSize(offsets[-1])
		writeCard8(file, offSize)
		offSize = -offSize
		pack = struct.pack
		for offset in offsets:
			binOffset = pack(">l", offset)[offSize:]
			assert len(binOffset) == -offSize
			file.write(binOffset)
		for item in self.items:
			if hasattr(item, "toFile"):
				item.toFile(file)
			else:
				file.write(item)

	def setPos(self, pos, endPos):
		self.parent.rawDict["FDArray"] = pos


class GlobalSubrsCompiler(IndexCompiler):
	def getItems(self, items, strings):
		out = []
		for cs in items:
			cs.compile()
			out.append(cs.bytecode)
		return out

class SubrsCompiler(GlobalSubrsCompiler):
	def setPos(self, pos, endPos):
		offset = pos - self.parent.pos
		self.parent.rawDict["Subrs"] = offset

class CharStringsCompiler(GlobalSubrsCompiler):
	def setPos(self, pos, endPos):
		self.parent.rawDict["CharStrings"] = pos


class Index(object):

	"""This class represents what the CFF spec calls an INDEX."""

	compilerClass = IndexCompiler

	def __init__(self, file=None):
		self.items = []
		name = self.__class__.__name__
		if file is None:
			return
		log.log(DEBUG, "loading %s at %s", name, file.tell())
		self.file = file
		count = readCard16(file)
		if count == 0:
			return
		self.items = [None] * count
		offSize = readCard8(file)
		log.log(DEBUG, "    index count: %s offSize: %s", count, offSize)
		assert offSize <= 4, "offSize too large: %s" % offSize
		self.offsets = offsets = []
		pad = b'\0' * (4 - offSize)
		for index in range(count+1):
			chunk = file.read(offSize)
			chunk = pad + chunk
			offset, = struct.unpack(">L", chunk)
			offsets.append(int(offset))
		self.offsetBase = file.tell() - 1
		file.seek(self.offsetBase + offsets[-1])  # pretend we've read the whole lot
		log.log(DEBUG, "    end of %s at %s", name, file.tell())

	def __len__(self):
		return len(self.items)

	def __getitem__(self, index):
		item = self.items[index]
		if item is not None:
			return item
		offset = self.offsets[index] + self.offsetBase
		size = self.offsets[index+1] - self.offsets[index]
		file = self.file
		file.seek(offset)
		data = file.read(size)
		assert len(data) == size
		item = self.produceItem(index, data, file, offset, size)
		self.items[index] = item
		return item

	def produceItem(self, index, data, file, offset, size):
		return data

	def append(self, item):
		self.items.append(item)

	def getCompiler(self, strings, parent):
		return self.compilerClass(self, strings, parent)


class GlobalSubrsIndex(Index):

	compilerClass = GlobalSubrsCompiler

	def __init__(self, file=None, globalSubrs=None, private=None, fdSelect=None, fdArray=None):
		Index.__init__(self, file)
		self.globalSubrs = globalSubrs
		self.private = private
		if fdSelect:
			self.fdSelect = fdSelect
		if fdArray:
			self.fdArray = fdArray

	def produceItem(self, index, data, file, offset, size):
		if self.private is not None:
			private = self.private
		elif hasattr(self, 'fdArray') and self.fdArray is not None:
			private = self.fdArray[self.fdSelect[index]].Private
		else:
			private = None
		return psCharStrings.T2CharString(data, private=private, globalSubrs=self.globalSubrs)

	def toXML(self, xmlWriter, progress):
		xmlWriter.comment("The 'index' attribute is only for humans; it is ignored when parsed.")
		xmlWriter.newline()
		for i in range(len(self)):
			subr = self[i]
			if subr.needsDecompilation():
				xmlWriter.begintag("CharString", index=i, raw=1)
			else:
				xmlWriter.begintag("CharString", index=i)
			xmlWriter.newline()
			subr.toXML(xmlWriter)
			xmlWriter.endtag("CharString")
			xmlWriter.newline()

	def fromXML(self, name, attrs, content):
		if name != "CharString":
			return
		subr = psCharStrings.T2CharString()
		subr.fromXML(name, attrs, content)
		self.append(subr)

	def getItemAndSelector(self, index):
		sel = None
		if hasattr(self, 'fdSelect'):
			sel = self.fdSelect[index]
		return self[index], sel


class SubrsIndex(GlobalSubrsIndex):
	compilerClass = SubrsCompiler


class TopDictIndex(Index):

	compilerClass = TopDictIndexCompiler

	def produceItem(self, index, data, file, offset, size):
		top = TopDict(self.strings, file, offset, self.GlobalSubrs)
		top.decompile(data)
		return top

	def toXML(self, xmlWriter, progress):
		for i in range(len(self)):
			xmlWriter.begintag("FontDict", index=i)
			xmlWriter.newline()
			self[i].toXML(xmlWriter, progress)
			xmlWriter.endtag("FontDict")
			xmlWriter.newline()


class FDArrayIndex(TopDictIndex):

	compilerClass = FDArrayIndexCompiler

	def produceItem(self, index, data, file, offset, size):
		fontDict = FontDict(self.strings, file, offset, self.GlobalSubrs)
		fontDict.decompile(data)
		return fontDict

	def fromXML(self, name, attrs, content):
		if name != "FontDict":
			return
		fontDict = FontDict()
		for element in content:
			if isinstance(element, basestring):
				continue
			name, attrs, content = element
			try:
				fontDict.fromXML(name, attrs, content)
			except KeyError:
				"""Since fonttools used to pass a lot of fields that are not relevant in the FDArray FontDict, there are 'ttx' files in the wild that contain all these. These got in the ttx files because fonttools writes explicit values for all the TopDict default values. These are not actually illegal in the context of an FDArray FontDict - you can legally, per spec, put any arbitrary key/value pair in a FontDict - but are useless since current major company CFF interpreters ignore anything but the set listed in this file. So, we just silently skip them. An exception is Weight: this is not used by any interepreter, but some foundries have asked that this be supported in FDArray FontDicts just to preserve information about the design when the font is being inspected."""
				pass
		self.append(fontDict)


class	FDSelect:
	def __init__(self, file=None, numGlyphs=None, format=None):
		if file:
			# read data in from file
			self.format = readCard8(file)
			if self.format == 0:
				from array import array
				self.gidArray = array("B", file.read(numGlyphs)).tolist()
			elif self.format == 3:
				gidArray = [None] * numGlyphs
				nRanges = readCard16(file)
				fd = None
				prev = None
				for i in range(nRanges):
					first = readCard16(file)
					if prev is not None:
						for glyphID in range(prev, first):
							gidArray[glyphID] = fd
					prev = first
					fd = readCard8(file)
				if prev is not None:
					first = readCard16(file)
					for glyphID in range(prev, first):
						gidArray[glyphID] = fd
				self.gidArray = gidArray
			else:
				assert False, "unsupported FDSelect format: %s" % format
		else:
			# reading from XML. Make empty gidArray,, and leave format as passed in.
			# format is None will result in the smallest representation being used.
			self.format = format
			self.gidArray = []

	def __len__(self):
		return len(self.gidArray)

	def __getitem__(self, index):
		return self.gidArray[index]

	def __setitem__(self, index, fdSelectValue):
		self.gidArray[index] = fdSelectValue

	def append(self, fdSelectValue):
		self.gidArray.append(fdSelectValue)

class CharStrings(object):

	def __init__(self, file, charset, globalSubrs, private, fdSelect, fdArray):
		if file is not None:
			self.charStringsIndex = SubrsIndex(file, globalSubrs, private, fdSelect, fdArray)
			self.charStrings = charStrings = {}
			for i in range(len(charset)):
				charStrings[charset[i]] = i
			self.charStringsAreIndexed = 1
			# read from OTF file: charStrings.values() are indices into charStringsIndex.
		else:
			self.charStrings = {}
			self.charStringsAreIndexed = 0
			# read from ttx file : charStrings.values() are actual charstrings
			self.globalSubrs = globalSubrs
			self.private = private
			if fdSelect is not None:
				self.fdSelect = fdSelect
			if fdArray is not None:
				self.fdArray = fdArray

	def keys(self):
		return list(self.charStrings.keys())

	def values(self):
		if self.charStringsAreIndexed:
			return self.charStringsIndex
		else:
			return list(self.charStrings.values())

	def has_key(self, name):
		return name in self.charStrings

	__contains__ = has_key

	def __len__(self):
		return len(self.charStrings)

	def __getitem__(self, name):
		charString = self.charStrings[name]
		if self.charStringsAreIndexed:
			charString = self.charStringsIndex[charString]
		return charString

	def __setitem__(self, name, charString):
		if self.charStringsAreIndexed:
			index = self.charStrings[name]
			self.charStringsIndex[index] = charString
		else:
			self.charStrings[name] = charString

	def getItemAndSelector(self, name):
		if self.charStringsAreIndexed:
			index = self.charStrings[name]
			return self.charStringsIndex.getItemAndSelector(index)
		else:
			if hasattr(self, 'fdArray'):
				if hasattr(self, 'fdSelect'):
					sel = self.charStrings[name].fdSelectIndex
				else:
					raise KeyError("fdSelect array not yet defined.")
			else:
				sel = None
			return self.charStrings[name], sel

	def toXML(self, xmlWriter, progress):
		names = sorted(self.keys())
		i = 0
		step = 10
		numGlyphs = len(names)
		for name in names:
			charStr, fdSelectIndex = self.getItemAndSelector(name)
			if charStr.needsDecompilation():
				raw = [("raw", 1)]
			else:
				raw = []
			if fdSelectIndex is None:
				xmlWriter.begintag("CharString", [('name', name)] + raw)
			else:
				xmlWriter.begintag("CharString",
						[('name', name), ('fdSelectIndex', fdSelectIndex)] + raw)
			xmlWriter.newline()
			charStr.toXML(xmlWriter)
			xmlWriter.endtag("CharString")
			xmlWriter.newline()
			if not i % step and progress is not None:
				progress.setLabel("Dumping 'CFF ' table... (%s)" % name)
				progress.increment(step / numGlyphs)
			i = i + 1

	def fromXML(self, name, attrs, content):
		for element in content:
			if isinstance(element, basestring):
				continue
			name, attrs, content = element
			if name != "CharString":
				continue
			fdID = -1
			if hasattr(self, "fdArray"):
				fdID = safeEval(attrs["fdSelectIndex"])
				private = self.fdArray[fdID].Private
			else:
				private = self.private

			glyphName = attrs["name"]
			charString = psCharStrings.T2CharString(
					private=private,
					globalSubrs=self.globalSubrs)
			charString.fromXML(name, attrs, content)
			if fdID >= 0:
				charString.fdSelectIndex = fdID
			self[glyphName] = charString


def readCard8(file):
	return byteord(file.read(1))

def readCard16(file):
	value, = struct.unpack(">H", file.read(2))
	return value

def writeCard8(file, value):
	file.write(bytechr(value))

def writeCard16(file, value):
	file.write(struct.pack(">H", value))

def packCard8(value):
	return bytechr(value)

def packCard16(value):
	return struct.pack(">H", value)

def buildOperatorDict(table):
	d = {}
	for op, name, arg, default, conv in table:
		d[op] = (name, arg)
	return d

def buildOpcodeDict(table):
	d = {}
	for op, name, arg, default, conv in table:
		if isinstance(op, tuple):
			op = bytechr(op[0]) + bytechr(op[1])
		else:
			op = bytechr(op)
		d[name] = (op, arg)
	return d

def buildOrder(table):
	l = []
	for op, name, arg, default, conv in table:
		l.append(name)
	return l

def buildDefaults(table):
	d = {}
	for op, name, arg, default, conv in table:
		if default is not None:
			d[name] = default
	return d

def buildConverters(table):
	d = {}
	for op, name, arg, default, conv in table:
		d[name] = conv
	return d


class SimpleConverter(object):
	def read(self, parent, value):
		return value
	def write(self, parent, value):
		return value
	def xmlWrite(self, xmlWriter, name, value, progress):
		xmlWriter.simpletag(name, value=value)
		xmlWriter.newline()
	def xmlRead(self, name, attrs, content, parent):
		return attrs["value"]

class ASCIIConverter(SimpleConverter):
	def read(self, parent, value):
		return tostr(value, encoding='ascii')
	def write(self, parent, value):
		return tobytes(value, encoding='ascii')
	def xmlWrite(self, xmlWriter, name, value, progress):
		xmlWriter.simpletag(name, value=tounicode(value, encoding="ascii"))
		xmlWriter.newline()
	def xmlRead(self, name, attrs, content, parent):
		return tobytes(attrs["value"], encoding=("ascii"))

class Latin1Converter(SimpleConverter):
	def read(self, parent, value):
		return tostr(value, encoding='latin1')
	def write(self, parent, value):
		return tobytes(value, encoding='latin1')
	def xmlWrite(self, xmlWriter, name, value, progress):
		xmlWriter.simpletag(name, value=tounicode(value, encoding="latin1"))
		xmlWriter.newline()
	def xmlRead(self, name, attrs, content, parent):
		return tobytes(attrs["value"], encoding=("latin1"))


def parseNum(s):
	try:
		value = int(s)
	except:
		value = float(s)
	return value

class NumberConverter(SimpleConverter):
	def xmlRead(self, name, attrs, content, parent):
		return parseNum(attrs["value"])

class ArrayConverter(SimpleConverter):
	def xmlWrite(self, xmlWriter, name, value, progress):
		value = " ".join(map(str, value))
		xmlWriter.simpletag(name, value=value)
		xmlWriter.newline()
	def xmlRead(self, name, attrs, content, parent):
		values = attrs["value"].split()
		return [parseNum(value) for value in values]

class TableConverter(SimpleConverter):
	def xmlWrite(self, xmlWriter, name, value, progress):
		xmlWriter.begintag(name)
		xmlWriter.newline()
		value.toXML(xmlWriter, progress)
		xmlWriter.endtag(name)
		xmlWriter.newline()
	def xmlRead(self, name, attrs, content, parent):
		ob = self.getClass()()
		for element in content:
			if isinstance(element, basestring):
				continue
			name, attrs, content = element
			ob.fromXML(name, attrs, content)
		return ob

class PrivateDictConverter(TableConverter):
	def getClass(self):
		return PrivateDict
	def read(self, parent, value):
		size, offset = value
		file = parent.file
		priv = PrivateDict(parent.strings, file, offset)
		file.seek(offset)
		data = file.read(size)
		assert len(data) == size
		priv.decompile(data)
		return priv
	def write(self, parent, value):
		return (0, 0)  # dummy value

class SubrsConverter(TableConverter):
	def getClass(self):
		return SubrsIndex
	def read(self, parent, value):
		file = parent.file
		file.seek(parent.offset + value)  # Offset(self)
		return SubrsIndex(file)
	def write(self, parent, value):
		return 0  # dummy value

class CharStringsConverter(TableConverter):
	def read(self, parent, value):
		file = parent.file
		charset = parent.charset
		globalSubrs = parent.GlobalSubrs
		if hasattr(parent, "ROS"):
			fdSelect, fdArray = parent.FDSelect, parent.FDArray
			private = None
		else:
			fdSelect, fdArray = None, None
			private = parent.Private
		file.seek(value)  # Offset(0)
		return CharStrings(file, charset, globalSubrs, private, fdSelect, fdArray)
	def write(self, parent, value):
		return 0  # dummy value
	def xmlRead(self, name, attrs, content, parent):
		if hasattr(parent, "ROS"):
			# if it is a CID-keyed font, then the private Dict is extracted from the parent.FDArray
			private, fdSelect, fdArray = None, parent.FDSelect, parent.FDArray
		else:
			# if it is a name-keyed font, then the private dict is in the top dict, and there is no fdArray.
			private, fdSelect, fdArray = parent.Private, None, None
		charStrings = CharStrings(None, None, parent.GlobalSubrs, private, fdSelect, fdArray)
		charStrings.fromXML(name, attrs, content)
		return charStrings

class CharsetConverter(object):
	def read(self, parent, value):
		isCID = hasattr(parent, "ROS")
		if value > 2:
			numGlyphs = parent.numGlyphs
			file = parent.file
			file.seek(value)
			log.log(DEBUG, "loading charset at %s", value)
			format = readCard8(file)
			if format == 0:
				charset = parseCharset0(numGlyphs, file, parent.strings, isCID)
			elif format == 1 or format == 2:
				charset = parseCharset(numGlyphs, file, parent.strings, isCID, format)
			else:
				raise NotImplementedError
			assert len(charset) == numGlyphs
			log.log(DEBUG, "    charset end at %s", file.tell())
		else: # offset == 0 -> no charset data.
			if isCID or "CharStrings" not in parent.rawDict:
				assert value == 0 # We get here only when processing fontDicts from the FDArray of CFF-CID fonts. Only the real topDict references the chrset.
				charset = None
			elif value == 0:
				charset = cffISOAdobeStrings
			elif value == 1:
				charset = cffIExpertStrings
			elif value == 2:
				charset = cffExpertSubsetStrings
		if charset and len(charset) != parent.numGlyphs:
			charset = charset[:parent.numGlyphs]
		return charset

	def write(self, parent, value):
		return 0  # dummy value
	def xmlWrite(self, xmlWriter, name, value, progress):
		# XXX only write charset when not in OT/TTX context, where we
		# dump charset as a separate "GlyphOrder" table.
		##xmlWriter.simpletag("charset")
		xmlWriter.comment("charset is dumped separately as the 'GlyphOrder' element")
		xmlWriter.newline()
	def xmlRead(self, name, attrs, content, parent):
		if 0:
			return safeEval(attrs["value"])


class CharsetCompiler(object):

	def __init__(self, strings, charset, parent):
		assert charset[0] == '.notdef'
		isCID = hasattr(parent.dictObj, "ROS")
		data0 = packCharset0(charset, isCID, strings)
		data = packCharset(charset, isCID, strings)
		if len(data) < len(data0):
			self.data = data
		else:
			self.data = data0
		self.parent = parent

	def setPos(self, pos, endPos):
		self.parent.rawDict["charset"] = pos

	def getDataLength(self):
		return len(self.data)

	def toFile(self, file):
		file.write(self.data)

def getStdCharSet(charset):
	# check to see if we can use a predefined charset value.
	charsetCode = None
	predefinedCharSets = [
		(cffISOAdobeStringCount, cffISOAdobeStrings, 0),
		(cffExpertStringCount, cffIExpertStrings, 1),
		(cffExpertSubsetStringCount, cffExpertSubsetStrings, 2) ]
	len_cs = len(charset)
	for cnt, charList, code in predefinedCharSets:
		if charsetCode != None:
			break
		if len_cs > cnt:
			continue
		charsetCode = code
		for i in range(len_cs):
			if charset[i] != charList[i]:
				charsetCode = None
				break
	return charsetCode

def getCIDfromName(name, strings):
	return int(name[3:])

def getSIDfromName(name, strings):
	return strings.getSID(name)

def packCharset0(charset, isCID, strings):
	fmt = 0
	data = [packCard8(fmt)]
	if isCID:
		getNameID = getCIDfromName
	else:
		getNameID = getSIDfromName

	for name in charset[1:]:
		data.append(packCard16(getNameID(name,strings)))
	return bytesjoin(data)


def packCharset(charset, isCID, strings):
	fmt = 1
	ranges = []
	first = None
	end = 0
	if isCID:
		getNameID = getCIDfromName
	else:
		getNameID = getSIDfromName

	for name in charset[1:]:
		SID = getNameID(name, strings)
		if first is None:
			first = SID
		elif end + 1 != SID:
			nLeft = end - first
			if nLeft > 255:
				fmt = 2
			ranges.append((first, nLeft))
			first = SID
		end = SID
	if end:
		nLeft = end - first
		if nLeft > 255:
			fmt = 2
		ranges.append((first, nLeft))

	data = [packCard8(fmt)]
	if fmt == 1:
		nLeftFunc = packCard8
	else:
		nLeftFunc = packCard16
	for first, nLeft in ranges:
		data.append(packCard16(first) + nLeftFunc(nLeft))
	return bytesjoin(data)

def parseCharset0(numGlyphs, file, strings, isCID):
	charset = [".notdef"]
	if isCID:
		for i in range(numGlyphs - 1):
			CID = readCard16(file)
			charset.append("cid" + str(CID).zfill(5))
	else:
		for i in range(numGlyphs - 1):
			SID = readCard16(file)
			charset.append(strings[SID])
	return charset

def parseCharset(numGlyphs, file, strings, isCID, fmt):
	charset = ['.notdef']
	count = 1
	if fmt == 1:
		nLeftFunc = readCard8
	else:
		nLeftFunc = readCard16
	while count < numGlyphs:
		first = readCard16(file)
		nLeft = nLeftFunc(file)
		if isCID:
			for CID in range(first, first+nLeft+1):
				charset.append("cid" + str(CID).zfill(5))
		else:
			for SID in range(first, first+nLeft+1):
				charset.append(strings[SID])
		count = count + nLeft + 1
	return charset


class EncodingCompiler(object):

	def __init__(self, strings, encoding, parent):
		assert not isinstance(encoding, basestring)
		data0 = packEncoding0(parent.dictObj.charset, encoding, parent.strings)
		data1 = packEncoding1(parent.dictObj.charset, encoding, parent.strings)
		if len(data0) < len(data1):
			self.data = data0
		else:
			self.data = data1
		self.parent = parent

	def setPos(self, pos, endPos):
		self.parent.rawDict["Encoding"] = pos

	def getDataLength(self):
		return len(self.data)

	def toFile(self, file):
		file.write(self.data)


class EncodingConverter(SimpleConverter):

	def read(self, parent, value):
		if value == 0:
			return "StandardEncoding"
		elif value == 1:
			return "ExpertEncoding"
		else:
			assert value > 1
			file = parent.file
			file.seek(value)
			log.log(DEBUG, "loading Encoding at %s", value)
			fmt = readCard8(file)
			haveSupplement = fmt & 0x80
			if haveSupplement:
				raise NotImplementedError("Encoding supplements are not yet supported")
			fmt = fmt & 0x7f
			if fmt == 0:
				encoding = parseEncoding0(parent.charset, file, haveSupplement,
						parent.strings)
			elif fmt == 1:
				encoding = parseEncoding1(parent.charset, file, haveSupplement,
						parent.strings)
			return encoding

	def write(self, parent, value):
		if value == "StandardEncoding":
			return 0
		elif value == "ExpertEncoding":
			return 1
		return 0  # dummy value

	def xmlWrite(self, xmlWriter, name, value, progress):
		if value in ("StandardEncoding", "ExpertEncoding"):
			xmlWriter.simpletag(name, name=value)
			xmlWriter.newline()
			return
		xmlWriter.begintag(name)
		xmlWriter.newline()
		for code in range(len(value)):
			glyphName = value[code]
			if glyphName != ".notdef":
				xmlWriter.simpletag("map", code=hex(code), name=glyphName)
				xmlWriter.newline()
		xmlWriter.endtag(name)
		xmlWriter.newline()

	def xmlRead(self, name, attrs, content, parent):
		if "name" in attrs:
			return attrs["name"]
		encoding = [".notdef"] * 256
		for element in content:
			if isinstance(element, basestring):
				continue
			name, attrs, content = element
			code = safeEval(attrs["code"])
			glyphName = attrs["name"]
			encoding[code] = glyphName
		return encoding


def parseEncoding0(charset, file, haveSupplement, strings):
	nCodes = readCard8(file)
	encoding = [".notdef"] * 256
	for glyphID in range(1, nCodes + 1):
		code = readCard8(file)
		if code != 0:
			encoding[code] = charset[glyphID]
	return encoding

def parseEncoding1(charset, file, haveSupplement, strings):
	nRanges = readCard8(file)
	encoding = [".notdef"] * 256
	glyphID = 1
	for i in range(nRanges):
		code = readCard8(file)
		nLeft = readCard8(file)
		for glyphID in range(glyphID, glyphID + nLeft + 1):
			encoding[code] = charset[glyphID]
			code = code + 1
		glyphID = glyphID + 1
	return encoding

def packEncoding0(charset, encoding, strings):
	fmt = 0
	m = {}
	for code in range(len(encoding)):
		name = encoding[code]
		if name != ".notdef":
			m[name] = code
	codes = []
	for name in charset[1:]:
		code = m.get(name)
		codes.append(code)

	while codes and codes[-1] is None:
		codes.pop()

	data = [packCard8(fmt), packCard8(len(codes))]
	for code in codes:
		if code is None:
			code = 0
		data.append(packCard8(code))
	return bytesjoin(data)

def packEncoding1(charset, encoding, strings):
	fmt = 1
	m = {}
	for code in range(len(encoding)):
		name = encoding[code]
		if name != ".notdef":
			m[name] = code
	ranges = []
	first = None
	end = 0
	for name in charset[1:]:
		code = m.get(name, -1)
		if first is None:
			first = code
		elif end + 1 != code:
			nLeft = end - first
			ranges.append((first, nLeft))
			first = code
		end = code
	nLeft = end - first
	ranges.append((first, nLeft))

	# remove unencoded glyphs at the end.
	while ranges and ranges[-1][0] == -1:
		ranges.pop()

	data = [packCard8(fmt), packCard8(len(ranges))]
	for first, nLeft in ranges:
		if first == -1:  # unencoded
			first = 0
		data.append(packCard8(first) + packCard8(nLeft))
	return bytesjoin(data)


class FDArrayConverter(TableConverter):

	def read(self, parent, value):
		file = parent.file
		file.seek(value)
		fdArray = FDArrayIndex(file)
		fdArray.strings = parent.strings
		fdArray.GlobalSubrs = parent.GlobalSubrs
		return fdArray

	def write(self, parent, value):
		return 0  # dummy value

	def xmlRead(self, name, attrs, content, parent):
		fdArray = FDArrayIndex()
		for element in content:
			if isinstance(element, basestring):
				continue
			name, attrs, content = element
			fdArray.fromXML(name, attrs, content)
		return fdArray


class FDSelectConverter(object):

	def read(self, parent, value):
		file = parent.file
		file.seek(value)
		fdSelect = FDSelect(file, parent.numGlyphs)
		return 	fdSelect

	def write(self, parent, value):
		return 0  # dummy value

	# The FDSelect glyph data is written out to XML in the charstring keys,
	# so we write out only the format selector
	def xmlWrite(self, xmlWriter, name, value, progress):
		xmlWriter.simpletag(name, [('format', value.format)])
		xmlWriter.newline()

	def xmlRead(self, name, attrs, content, parent):
		fmt = safeEval(attrs["format"])
		file = None
		numGlyphs = None
		fdSelect = FDSelect(file, numGlyphs, fmt)
		return fdSelect


def packFDSelect0(fdSelectArray):
	fmt = 0
	data = [packCard8(fmt)]
	for index in fdSelectArray:
		data.append(packCard8(index))
	return bytesjoin(data)


def packFDSelect3(fdSelectArray):
	fmt = 3
	fdRanges = []
	first = None
	end = 0
	lenArray = len(fdSelectArray)
	lastFDIndex = -1
	for i in range(lenArray):
		fdIndex = fdSelectArray[i]
		if lastFDIndex != fdIndex:
			fdRanges.append([i, fdIndex])
			lastFDIndex = fdIndex
	sentinelGID = i + 1

	data = [packCard8(fmt)]
	data.append(packCard16( len(fdRanges) ))
	for fdRange in fdRanges:
		data.append(packCard16(fdRange[0]))
		data.append(packCard8(fdRange[1]))
	data.append(packCard16(sentinelGID))
	return bytesjoin(data)


class FDSelectCompiler(object):

	def __init__(self, fdSelect, parent):
		fmt = fdSelect.format
		fdSelectArray = fdSelect.gidArray
		if fmt == 0:
			self.data = packFDSelect0(fdSelectArray)
		elif fmt == 3:
			self.data = packFDSelect3(fdSelectArray)
		else:
			# choose smaller of the two formats
			data0 = packFDSelect0(fdSelectArray)
			data3 = packFDSelect3(fdSelectArray)
			if len(data0) < len(data3):
				self.data = data0
				fdSelect.format = 0
			else:
				self.data = data3
				fdSelect.format = 3

		self.parent = parent

	def setPos(self, pos, endPos):
		self.parent.rawDict["FDSelect"] = pos

	def getDataLength(self):
		return len(self.data)

	def toFile(self, file):
		file.write(self.data)


class ROSConverter(SimpleConverter):

	def xmlWrite(self, xmlWriter, name, value, progress):
		registry, order, supplement = value
		xmlWriter.simpletag(name, [('Registry', tostr(registry)), ('Order', tostr(order)),
			('Supplement', supplement)])
		xmlWriter.newline()

	def xmlRead(self, name, attrs, content, parent):
		return (attrs['Registry'], attrs['Order'], safeEval(attrs['Supplement']))


topDictOperators = [
#	opcode		name			argument type	default	converter
	((12, 30),	'ROS',	('SID', 'SID', 'number'),	None,	ROSConverter()),
	((12, 20),	'SyntheticBase',	'number',	None,	None),
	(0,		'version',		'SID',		None,	None),
	(1,		'Notice',		'SID',		None,	Latin1Converter()),
	((12, 0),	'Copyright',		'SID',		None,	Latin1Converter()),
	(2,		'FullName',		'SID',		None,	None),
	((12, 38),	'FontName',		'SID',		None,	None),
	(3,		'FamilyName',		'SID',		None,	None),
	(4,		'Weight',		'SID',		None,	None),
	((12, 1),	'isFixedPitch',		'number',	0,	None),
	((12, 2),	'ItalicAngle',		'number',	0,	None),
	((12, 3),	'UnderlinePosition',	'number',	None,	None),
	((12, 4),	'UnderlineThickness',	'number',	50,	None),
	((12, 5),	'PaintType',		'number',	0,	None),
	((12, 6),	'CharstringType',	'number',	2,	None),
	((12, 7),	'FontMatrix',		'array',	[0.001, 0, 0, 0.001, 0, 0],	None),
	(13,		'UniqueID',		'number',	None,	None),
	(5,		'FontBBox',		'array',	[0, 0, 0, 0],	None),
	((12, 8),	'StrokeWidth',		'number',	0,	None),
	(14,		'XUID',			'array',	None,	None),
	((12, 21),	'PostScript',		'SID',		None,	None),
	((12, 22),	'BaseFontName',		'SID',		None,	None),
	((12, 23),	'BaseFontBlend',	'delta',	None,	None),
	((12, 31),	'CIDFontVersion',	'number',	0,	None),
	((12, 32),	'CIDFontRevision',	'number',	0,	None),
	((12, 33),	'CIDFontType',		'number',	0,	None),
	((12, 34),	'CIDCount',		'number',	8720,	None),
	(15,		'charset',		'number',	0,	CharsetConverter()),
	((12, 35),	'UIDBase',		'number',	None,	None),
	(16,		'Encoding',		'number',	0,	EncodingConverter()),
	(18,		'Private',	('number', 'number'),	None,	PrivateDictConverter()),
	((12, 37),	'FDSelect',		'number',	None,	FDSelectConverter()),
	((12, 36),	'FDArray',		'number',	None,	FDArrayConverter()),
	(17,		'CharStrings',		'number',	None,	CharStringsConverter()),
]

fontDictOperators = [
#	opcode		name			argument type	default	converter
	((12, 38),	'FontName',		'SID',		None,	None),
	((12, 7),	'FontMatrix',		'array',	[0.001, 0, 0, 0.001, 0, 0],	None),
	(4,		'Weight',		'SID',		None,	None),
	(18,		'Private',	('number', 'number'),	None,	PrivateDictConverter()),
]



# Note! FDSelect and FDArray must both preceed CharStrings in the output XML build order,
# in order for the font to compile back from xml.


privateDictOperators = [
#	opcode		name			argument type	default	converter
	(6,		'BlueValues',		'delta',	None,	None),
	(7,		'OtherBlues',		'delta',	None,	None),
	(8,		'FamilyBlues',		'delta',	None,	None),
	(9,		'FamilyOtherBlues',	'delta',	None,	None),
	((12, 9),	'BlueScale',		'number',	0.039625, None),
	((12, 10),	'BlueShift',		'number',	7,	None),
	((12, 11),	'BlueFuzz',		'number',	1,	None),
	(10,		'StdHW',		'number',	None,	None),
	(11,		'StdVW',		'number',	None,	None),
	((12, 12),	'StemSnapH',		'delta',	None,	None),
	((12, 13),	'StemSnapV',		'delta',	None,	None),
	((12, 14),	'ForceBold',		'number',	0,	None),
	((12, 15),	'ForceBoldThreshold',	'number',	None,	None), # deprecated
	((12, 16),	'lenIV',		'number',	None,	None), # deprecated
	((12, 17),	'LanguageGroup',	'number',	0,	None),
	((12, 18),	'ExpansionFactor',	'number',	0.06,	None),
	((12, 19),	'initialRandomSeed',	'number',	0,	None),
	(20,		'defaultWidthX',	'number',	0,	None),
	(21,		'nominalWidthX',	'number',	0,	None),
	(19,		'Subrs',		'number',	None,	SubrsConverter()),
]

def addConverters(table):
	for i in range(len(table)):
		op, name, arg, default, conv = table[i]
		if conv is not None:
			continue
		if arg in ("delta", "array"):
			conv = ArrayConverter()
		elif arg == "number":
			conv = NumberConverter()
		elif arg == "SID":
			conv = ASCIIConverter()
		else:
			assert False
		table[i] = op, name, arg, default, conv

addConverters(privateDictOperators)
addConverters(topDictOperators)
addConverters(fontDictOperators)


class TopDictDecompiler(psCharStrings.DictDecompiler):
	operators = buildOperatorDict(topDictOperators)

class FontDictDecompiler(psCharStrings.DictDecompiler):
	operators = buildOperatorDict(fontDictOperators)

class PrivateDictDecompiler(psCharStrings.DictDecompiler):
	operators = buildOperatorDict(privateDictOperators)


class DictCompiler(object):

	def __init__(self, dictObj, strings, parent):
		assert isinstance(strings, IndexedStrings)
		self.dictObj = dictObj
		self.strings = strings
		self.parent = parent
		rawDict = {}
		for name in dictObj.order:
			value = getattr(dictObj, name, None)
			if value is None:
				continue
			conv = dictObj.converters[name]
			value = conv.write(dictObj, value)
			if value == dictObj.defaults.get(name):
				continue
			rawDict[name] = value
		self.rawDict = rawDict

	def setPos(self, pos, endPos):
		pass

	def getDataLength(self):
		return len(self.compile("getDataLength"))

	def compile(self, reason):
		log.log(DEBUG, "-- compiling %s for %s", self.__class__.__name__, reason)
		rawDict = self.rawDict
		data = []
		for name in self.dictObj.order:
			value = rawDict.get(name)
			if value is None:
				continue
			op, argType = self.opcodes[name]
			if isinstance(argType, tuple):
				l = len(argType)
				assert len(value) == l, "value doesn't match arg type"
				for i in range(l):
					arg = argType[i]
					v = value[i]
					arghandler = getattr(self, "arg_" + arg)
					data.append(arghandler(v))
			else:
				arghandler = getattr(self, "arg_" + argType)
				data.append(arghandler(value))
			data.append(op)
		return bytesjoin(data)

	def toFile(self, file):
		file.write(self.compile("toFile"))

	def arg_number(self, num):
		return encodeNumber(num)
	def arg_SID(self, s):
		return psCharStrings.encodeIntCFF(self.strings.getSID(s))
	def arg_array(self, value):
		data = []
		for num in value:
			data.append(encodeNumber(num))
		return bytesjoin(data)
	def arg_delta(self, value):
		out = []
		last = 0
		for v in value:
			out.append(v - last)
			last = v
		data = []
		for num in out:
			data.append(encodeNumber(num))
		return bytesjoin(data)


def encodeNumber(num):
	if isinstance(num, float):
		return psCharStrings.encodeFloat(num)
	else:
		return psCharStrings.encodeIntCFF(num)


class TopDictCompiler(DictCompiler):

	opcodes = buildOpcodeDict(topDictOperators)

	def getChildren(self, strings):
		children = []
		if hasattr(self.dictObj, "charset") and self.dictObj.charset:
			if  hasattr(self.dictObj, "ROS"): # aka isCID
				charsetCode = None
			else:
				charsetCode = getStdCharSet(self.dictObj.charset)
			if charsetCode == None:
				children.append(CharsetCompiler(strings, self.dictObj.charset, self))
			else:
				self.rawDict["charset"] = charsetCode
		if hasattr(self.dictObj, "Encoding"):
			encoding = self.dictObj.Encoding
			if not isinstance(encoding, basestring):
				children.append(EncodingCompiler(strings, encoding, self))
		if hasattr(self.dictObj, "FDSelect"):
			# I have not yet supported merging a ttx CFF-CID font, as there are interesting
			# issues about merging the FDArrays. Here I assume that
			# either the font was read from XML, and the FDSelect indices are all
			# in the charstring data, or the FDSelect array is already fully defined.
			fdSelect = self.dictObj.FDSelect
			if len(fdSelect) == 0: # probably read in from XML; assume fdIndex in CharString data
				charStrings = self.dictObj.CharStrings
				for name in self.dictObj.charset:
					fdSelect.append(charStrings[name].fdSelectIndex)
			fdSelectComp = FDSelectCompiler(fdSelect, self)
			children.append(fdSelectComp)
		if hasattr(self.dictObj, "CharStrings"):
			items = []
			charStrings = self.dictObj.CharStrings
			for name in self.dictObj.charset:
				items.append(charStrings[name])
			charStringsComp = CharStringsCompiler(items, strings, self)
			children.append(charStringsComp)
		if hasattr(self.dictObj, "FDArray"):
			# I have not yet supported merging a ttx CFF-CID font, as there are interesting
			# issues about merging the FDArrays. Here I assume that the FDArray info is correct
			# and complete.
			fdArrayIndexComp = self.dictObj.FDArray.getCompiler(strings, self)
			children.append(fdArrayIndexComp)
			children.extend(fdArrayIndexComp.getChildren(strings))
		if hasattr(self.dictObj, "Private"):
			privComp = self.dictObj.Private.getCompiler(strings, self)
			children.append(privComp)
			children.extend(privComp.getChildren(strings))
		return children


class FontDictCompiler(DictCompiler):

	opcodes = buildOpcodeDict(fontDictOperators)

	def getChildren(self, strings):
		children = []
		if hasattr(self.dictObj, "Private"):
			privComp = self.dictObj.Private.getCompiler(strings, self)
			children.append(privComp)
			children.extend(privComp.getChildren(strings))
		return children


class PrivateDictCompiler(DictCompiler):

	opcodes = buildOpcodeDict(privateDictOperators)

	def setPos(self, pos, endPos):
		size = endPos - pos
		self.parent.rawDict["Private"] = size, pos
		self.pos = pos

	def getChildren(self, strings):
		children = []
		if hasattr(self.dictObj, "Subrs"):
			children.append(self.dictObj.Subrs.getCompiler(strings, self))
		return children


class BaseDict(object):

	def __init__(self, strings=None, file=None, offset=None):
		self.rawDict = {}
		if offset is not None:
			log.log(DEBUG, "loading %s at %s", self.__class__.__name__, offset)
		self.file = file
		self.offset = offset
		self.strings = strings
		self.skipNames = []

	def decompile(self, data):
		log.log(DEBUG, "    length %s is %d", self.__class__.__name__, len(data))
		dec = self.decompilerClass(self.strings)
		dec.decompile(data)
		self.rawDict = dec.getDict()
		self.postDecompile()

	def postDecompile(self):
		pass

	def getCompiler(self, strings, parent):
		return self.compilerClass(self, strings, parent)

	def __getattr__(self, name):
		value = self.rawDict.get(name)
		if value is None:
			value = self.defaults.get(name)
		if value is None:
			raise AttributeError(name)
		conv = self.converters[name]
		value = conv.read(self, value)
		setattr(self, name, value)
		return value

	def toXML(self, xmlWriter, progress):
		for name in self.order:
			if name in self.skipNames:
				continue
			value = getattr(self, name, None)
			if value is None:
				continue
			conv = self.converters[name]
			conv.xmlWrite(xmlWriter, name, value, progress)

	def fromXML(self, name, attrs, content):
		conv = self.converters[name]
		value = conv.xmlRead(name, attrs, content, self)
		setattr(self, name, value)


class TopDict(BaseDict):

	defaults = buildDefaults(topDictOperators)
	converters = buildConverters(topDictOperators)
	order = buildOrder(topDictOperators)
	decompilerClass = TopDictDecompiler
	compilerClass = TopDictCompiler

	def __init__(self, strings=None, file=None, offset=None, GlobalSubrs=None):
		BaseDict.__init__(self, strings, file, offset)
		self.GlobalSubrs = GlobalSubrs

	def getGlyphOrder(self):
		return self.charset

	def postDecompile(self):
		offset = self.rawDict.get("CharStrings")
		if offset is None:
			return
		# get the number of glyphs beforehand.
		self.file.seek(offset)
		self.numGlyphs = readCard16(self.file)

	def toXML(self, xmlWriter, progress):
		if hasattr(self, "CharStrings"):
			self.decompileAllCharStrings(progress)
		if hasattr(self, "ROS"):
			self.skipNames = ['Encoding']
		if not hasattr(self, "ROS") or not hasattr(self, "CharStrings"):
			# these values have default values, but I only want them to show up
			# in CID fonts.
			self.skipNames = ['CIDFontVersion', 'CIDFontRevision', 'CIDFontType',
					'CIDCount']
		BaseDict.toXML(self, xmlWriter, progress)

	def decompileAllCharStrings(self, progress):
		# XXX only when doing ttdump -i?
		i = 0
		for charString in self.CharStrings.values():
			try:
				charString.decompile()
			except:
				log.error("Error in charstring %s", i)
				import sys
				typ, value = sys.exc_info()[0:2]
				raise typ(value)
			if not i % 30 and progress:
				progress.increment(0)  # update
			i = i + 1


class FontDict(TopDict):

	defaults = buildDefaults(fontDictOperators)
	converters = buildConverters(fontDictOperators)
	order = buildOrder(fontDictOperators)
	decompilerClass = FontDictDecompiler
	compilerClass = FontDictCompiler

	def __init__(self, strings=None, file=None, offset=None, GlobalSubrs=None):
		TopDict.__init__(self, strings, file, offset)

	def toXML(self, xmlWriter, progress):
		BaseDict.toXML(self, xmlWriter, progress)


class PrivateDict(BaseDict):
	defaults = buildDefaults(privateDictOperators)
	converters = buildConverters(privateDictOperators)
	order = buildOrder(privateDictOperators)
	decompilerClass = PrivateDictDecompiler
	compilerClass = PrivateDictCompiler


class IndexedStrings(object):

	"""SID -> string mapping."""

	def __init__(self, file=None):
		if file is None:
			strings = []
		else:
			strings = [tostr(s, encoding="latin1") for s in Index(file)]
		self.strings = strings

	def getCompiler(self):
		return IndexedStringsCompiler(self, None, None)

	def __len__(self):
		return len(self.strings)

	def __getitem__(self, SID):
		if SID < cffStandardStringCount:
			return cffStandardStrings[SID]
		else:
			return self.strings[SID - cffStandardStringCount]

	def getSID(self, s):
		if not hasattr(self, "stringMapping"):
			self.buildStringMapping()
		s = tostr(s, encoding="latin1")
		if s in cffStandardStringMapping:
			SID = cffStandardStringMapping[s]
		elif s in self.stringMapping:
			SID = self.stringMapping[s]
		else:
			SID = len(self.strings) + cffStandardStringCount
			self.strings.append(s)
			self.stringMapping[s] = SID
		return SID

	def getStrings(self):
		return self.strings

	def buildStringMapping(self):
		self.stringMapping = {}
		for index in range(len(self.strings)):
			self.stringMapping[self.strings[index]] = index + cffStandardStringCount


# The 391 Standard Strings as used in the CFF format.
# from Adobe Technical None #5176, version 1.0, 18 March 1998

cffStandardStrings = ['.notdef', 'space', 'exclam', 'quotedbl', 'numbersign',
		'dollar', 'percent', 'ampersand', 'quoteright', 'parenleft', 'parenright',
		'asterisk', 'plus', 'comma', 'hyphen', 'period', 'slash', 'zero', 'one',
		'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'colon',
		'semicolon', 'less', 'equal', 'greater', 'question', 'at', 'A', 'B', 'C',
		'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R',
		'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'bracketleft', 'backslash',
		'bracketright', 'asciicircum', 'underscore', 'quoteleft', 'a', 'b', 'c',
		'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r',
		's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'braceleft', 'bar', 'braceright',
		'asciitilde', 'exclamdown', 'cent', 'sterling', 'fraction', 'yen', 'florin',
		'section', 'currency', 'quotesingle', 'quotedblleft', 'guillemotleft',
		'guilsinglleft', 'guilsinglright', 'fi', 'fl', 'endash', 'dagger',
		'daggerdbl', 'periodcentered', 'paragraph', 'bullet', 'quotesinglbase',
		'quotedblbase', 'quotedblright', 'guillemotright', 'ellipsis', 'perthousand',
		'questiondown', 'grave', 'acute', 'circumflex', 'tilde', 'macron', 'breve',
		'dotaccent', 'dieresis', 'ring', 'cedilla', 'hungarumlaut', 'ogonek', 'caron',
		'emdash', 'AE', 'ordfeminine', 'Lslash', 'Oslash', 'OE', 'ordmasculine', 'ae',
		'dotlessi', 'lslash', 'oslash', 'oe', 'germandbls', 'onesuperior',
		'logicalnot', 'mu', 'trademark', 'Eth', 'onehalf', 'plusminus', 'Thorn',
		'onequarter', 'divide', 'brokenbar', 'degree', 'thorn', 'threequarters',
		'twosuperior', 'registered', 'minus', 'eth', 'multiply', 'threesuperior',
		'copyright', 'Aacute', 'Acircumflex', 'Adieresis', 'Agrave', 'Aring',
		'Atilde', 'Ccedilla', 'Eacute', 'Ecircumflex', 'Edieresis', 'Egrave',
		'Iacute', 'Icircumflex', 'Idieresis', 'Igrave', 'Ntilde', 'Oacute',
		'Ocircumflex', 'Odieresis', 'Ograve', 'Otilde', 'Scaron', 'Uacute',
		'Ucircumflex', 'Udieresis', 'Ugrave', 'Yacute', 'Ydieresis', 'Zcaron',
		'aacute', 'acircumflex', 'adieresis', 'agrave', 'aring', 'atilde', 'ccedilla',
		'eacute', 'ecircumflex', 'edieresis', 'egrave', 'iacute', 'icircumflex',
		'idieresis', 'igrave', 'ntilde', 'oacute', 'ocircumflex', 'odieresis',
		'ograve', 'otilde', 'scaron', 'uacute', 'ucircumflex', 'udieresis', 'ugrave',
		'yacute', 'ydieresis', 'zcaron', 'exclamsmall', 'Hungarumlautsmall',
		'dollaroldstyle', 'dollarsuperior', 'ampersandsmall', 'Acutesmall',
		'parenleftsuperior', 'parenrightsuperior', 'twodotenleader', 'onedotenleader',
		'zerooldstyle', 'oneoldstyle', 'twooldstyle', 'threeoldstyle', 'fouroldstyle',
		'fiveoldstyle', 'sixoldstyle', 'sevenoldstyle', 'eightoldstyle',
		'nineoldstyle', 'commasuperior', 'threequartersemdash', 'periodsuperior',
		'questionsmall', 'asuperior', 'bsuperior', 'centsuperior', 'dsuperior',
		'esuperior', 'isuperior', 'lsuperior', 'msuperior', 'nsuperior', 'osuperior',
		'rsuperior', 'ssuperior', 'tsuperior', 'ff', 'ffi', 'ffl', 'parenleftinferior',
		'parenrightinferior', 'Circumflexsmall', 'hyphensuperior', 'Gravesmall',
		'Asmall', 'Bsmall', 'Csmall', 'Dsmall', 'Esmall', 'Fsmall', 'Gsmall', 'Hsmall',
		'Ismall', 'Jsmall', 'Ksmall', 'Lsmall', 'Msmall', 'Nsmall', 'Osmall', 'Psmall',
		'Qsmall', 'Rsmall', 'Ssmall', 'Tsmall', 'Usmall', 'Vsmall', 'Wsmall', 'Xsmall',
		'Ysmall', 'Zsmall', 'colonmonetary', 'onefitted', 'rupiah', 'Tildesmall',
		'exclamdownsmall', 'centoldstyle', 'Lslashsmall', 'Scaronsmall', 'Zcaronsmall',
		'Dieresissmall', 'Brevesmall', 'Caronsmall', 'Dotaccentsmall', 'Macronsmall',
		'figuredash', 'hypheninferior', 'Ogoneksmall', 'Ringsmall', 'Cedillasmall',
		'questiondownsmall', 'oneeighth', 'threeeighths', 'fiveeighths', 'seveneighths',
		'onethird', 'twothirds', 'zerosuperior', 'foursuperior', 'fivesuperior',
		'sixsuperior', 'sevensuperior', 'eightsuperior', 'ninesuperior', 'zeroinferior',
		'oneinferior', 'twoinferior', 'threeinferior', 'fourinferior', 'fiveinferior',
		'sixinferior', 'seveninferior', 'eightinferior', 'nineinferior', 'centinferior',
		'dollarinferior', 'periodinferior', 'commainferior', 'Agravesmall',
		'Aacutesmall', 'Acircumflexsmall', 'Atildesmall', 'Adieresissmall', 'Aringsmall',
		'AEsmall', 'Ccedillasmall', 'Egravesmall', 'Eacutesmall', 'Ecircumflexsmall',
		'Edieresissmall', 'Igravesmall', 'Iacutesmall', 'Icircumflexsmall',
		'Idieresissmall', 'Ethsmall', 'Ntildesmall', 'Ogravesmall', 'Oacutesmall',
		'Ocircumflexsmall', 'Otildesmall', 'Odieresissmall', 'OEsmall', 'Oslashsmall',
		'Ugravesmall', 'Uacutesmall', 'Ucircumflexsmall', 'Udieresissmall',
		'Yacutesmall', 'Thornsmall', 'Ydieresissmall', '001.000', '001.001', '001.002',
		'001.003', 'Black', 'Bold', 'Book', 'Light', 'Medium', 'Regular', 'Roman',
		'Semibold'
]

cffStandardStringCount = 391
assert len(cffStandardStrings) == cffStandardStringCount
# build reverse mapping
cffStandardStringMapping = {}
for _i in range(cffStandardStringCount):
	cffStandardStringMapping[cffStandardStrings[_i]] = _i

cffISOAdobeStrings = [".notdef", "space", "exclam", "quotedbl", "numbersign",
"dollar", "percent", "ampersand", "quoteright", "parenleft", "parenright",
"asterisk", "plus", "comma", "hyphen", "period", "slash", "zero", "one", "two",
"three", "four", "five", "six", "seven", "eight", "nine", "colon", "semicolon",
"less", "equal", "greater", "question", "at", "A", "B", "C", "D", "E", "F", "G",
"H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W",
"X", "Y", "Z", "bracketleft", "backslash", "bracketright", "asciicircum",
"underscore", "quoteleft", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j",
"k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z",
"braceleft", "bar", "braceright", "asciitilde", "exclamdown", "cent",
"sterling", "fraction", "yen", "florin", "section", "currency", "quotesingle",
"quotedblleft", "guillemotleft", "guilsinglleft", "guilsinglright", "fi", "fl",
"endash", "dagger", "daggerdbl", "periodcentered", "paragraph", "bullet",
"quotesinglbase", "quotedblbase", "quotedblright", "guillemotright", "ellipsis",
"perthousand", "questiondown", "grave", "acute", "circumflex", "tilde",
"macron", "breve", "dotaccent", "dieresis", "ring", "cedilla", "hungarumlaut",
"ogonek", "caron", "emdash", "AE", "ordfeminine", "Lslash", "Oslash", "OE",
"ordmasculine", "ae", "dotlessi", "lslash", "oslash", "oe", "germandbls",
"onesuperior", "logicalnot", "mu", "trademark", "Eth", "onehalf", "plusminus",
"Thorn", "onequarter", "divide", "brokenbar", "degree", "thorn",
"threequarters", "twosuperior", "registered", "minus", "eth", "multiply",
"threesuperior", "copyright", "Aacute", "Acircumflex", "Adieresis", "Agrave",
"Aring", "Atilde", "Ccedilla", "Eacute", "Ecircumflex", "Edieresis", "Egrave",
"Iacute", "Icircumflex", "Idieresis", "Igrave", "Ntilde", "Oacute",
"Ocircumflex", "Odieresis", "Ograve", "Otilde", "Scaron", "Uacute",
"Ucircumflex", "Udieresis", "Ugrave", "Yacute", "Ydieresis", "Zcaron", "aacute",
"acircumflex", "adieresis", "agrave", "aring", "atilde", "ccedilla", "eacute",
"ecircumflex", "edieresis", "egrave", "iacute", "icircumflex", "idieresis",
"igrave", "ntilde", "oacute", "ocircumflex", "odieresis", "ograve", "otilde",
"scaron", "uacute", "ucircumflex", "udieresis", "ugrave", "yacute", "ydieresis",
"zcaron"]

cffISOAdobeStringCount = 229
assert len(cffISOAdobeStrings) == cffISOAdobeStringCount

cffIExpertStrings = [".notdef", "space", "exclamsmall", "Hungarumlautsmall",
"dollaroldstyle", "dollarsuperior", "ampersandsmall", "Acutesmall",
"parenleftsuperior", "parenrightsuperior", "twodotenleader", "onedotenleader",
"comma", "hyphen", "period", "fraction", "zerooldstyle", "oneoldstyle",
"twooldstyle", "threeoldstyle", "fouroldstyle", "fiveoldstyle", "sixoldstyle",
"sevenoldstyle", "eightoldstyle", "nineoldstyle", "colon", "semicolon",
"commasuperior", "threequartersemdash", "periodsuperior", "questionsmall",
"asuperior", "bsuperior", "centsuperior", "dsuperior", "esuperior", "isuperior",
"lsuperior", "msuperior", "nsuperior", "osuperior", "rsuperior", "ssuperior",
"tsuperior", "ff", "fi", "fl", "ffi", "ffl", "parenleftinferior",
"parenrightinferior", "Circumflexsmall", "hyphensuperior", "Gravesmall",
"Asmall", "Bsmall", "Csmall", "Dsmall", "Esmall", "Fsmall", "Gsmall", "Hsmall",
"Ismall", "Jsmall", "Ksmall", "Lsmall", "Msmall", "Nsmall", "Osmall", "Psmall",
"Qsmall", "Rsmall", "Ssmall", "Tsmall", "Usmall", "Vsmall", "Wsmall", "Xsmall",
"Ysmall", "Zsmall", "colonmonetary", "onefitted", "rupiah", "Tildesmall",
"exclamdownsmall", "centoldstyle", "Lslashsmall", "Scaronsmall", "Zcaronsmall",
"Dieresissmall", "Brevesmall", "Caronsmall", "Dotaccentsmall", "Macronsmall",
"figuredash", "hypheninferior", "Ogoneksmall", "Ringsmall", "Cedillasmall",
"onequarter", "onehalf", "threequarters", "questiondownsmall", "oneeighth",
"threeeighths", "fiveeighths", "seveneighths", "onethird", "twothirds",
"zerosuperior", "onesuperior", "twosuperior", "threesuperior", "foursuperior",
"fivesuperior", "sixsuperior", "sevensuperior", "eightsuperior", "ninesuperior",
"zeroinferior", "oneinferior", "twoinferior", "threeinferior", "fourinferior",
"fiveinferior", "sixinferior", "seveninferior", "eightinferior", "nineinferior",
"centinferior", "dollarinferior", "periodinferior", "commainferior",
"Agravesmall", "Aacutesmall", "Acircumflexsmall", "Atildesmall",
"Adieresissmall", "Aringsmall", "AEsmall", "Ccedillasmall", "Egravesmall",
"Eacutesmall", "Ecircumflexsmall", "Edieresissmall", "Igravesmall",
"Iacutesmall", "Icircumflexsmall", "Idieresissmall", "Ethsmall", "Ntildesmall",
"Ogravesmall", "Oacutesmall", "Ocircumflexsmall", "Otildesmall",
"Odieresissmall", "OEsmall", "Oslashsmall", "Ugravesmall", "Uacutesmall",
"Ucircumflexsmall", "Udieresissmall", "Yacutesmall", "Thornsmall",
"Ydieresissmall"]

cffExpertStringCount = 166
assert len(cffIExpertStrings) == cffExpertStringCount

cffExpertSubsetStrings = [".notdef", "space", "dollaroldstyle",
"dollarsuperior", "parenleftsuperior", "parenrightsuperior", "twodotenleader",
"onedotenleader", "comma", "hyphen", "period", "fraction", "zerooldstyle",
"oneoldstyle", "twooldstyle", "threeoldstyle", "fouroldstyle", "fiveoldstyle",
"sixoldstyle", "sevenoldstyle", "eightoldstyle", "nineoldstyle", "colon",
"semicolon", "commasuperior", "threequartersemdash", "periodsuperior",
"asuperior", "bsuperior", "centsuperior", "dsuperior", "esuperior", "isuperior",
"lsuperior", "msuperior", "nsuperior", "osuperior", "rsuperior", "ssuperior",
"tsuperior", "ff", "fi", "fl", "ffi", "ffl", "parenleftinferior",
"parenrightinferior", "hyphensuperior", "colonmonetary", "onefitted", "rupiah",
"centoldstyle", "figuredash", "hypheninferior", "onequarter", "onehalf",
"threequarters", "oneeighth", "threeeighths", "fiveeighths", "seveneighths",
"onethird", "twothirds", "zerosuperior", "onesuperior", "twosuperior",
"threesuperior", "foursuperior", "fivesuperior", "sixsuperior", "sevensuperior",
"eightsuperior", "ninesuperior", "zeroinferior", "oneinferior", "twoinferior",
"threeinferior", "fourinferior", "fiveinferior", "sixinferior", "seveninferior",
"eightinferior", "nineinferior", "centinferior", "dollarinferior",
"periodinferior", "commainferior"]

cffExpertSubsetStringCount = 87
assert len(cffExpertSubsetStrings) == cffExpertSubsetStringCount