from fontTools.misc import sstruct
from fontTools.misc.fixedTools import floatToFixedToStr
from fontTools.misc.textTools import byteord, safeEval
# from itertools import *
from . import DefaultTable
from . import grUtils
from array import array
from functools import reduce
import struct, re, sys
Silf_hdr_format = """
>
version: 16.16F
"""
Silf_hdr_format_3 = """
>
version: 16.16F
compilerVersion: L
numSilf: H
x
x
"""
Silf_part1_format_v3 = """
>
ruleVersion: 16.16F
passOffset: H
pseudosOffset: H
"""
Silf_part1_format = """
>
maxGlyphID: H
extraAscent: h
extraDescent: h
numPasses: B
iSubst: B
iPos: B
iJust: B
iBidi: B
flags: B
maxPreContext: B
maxPostContext: B
attrPseudo: B
attrBreakWeight: B
attrDirectionality: B
attrMirroring: B
attrSkipPasses: B
numJLevels: B
"""
Silf_justify_format = """
>
attrStretch: B
attrShrink: B
attrStep: B
attrWeight: B
runto: B
x
x
x
"""
Silf_part2_format = """
>
numLigComp: H
numUserDefn: B
maxCompPerLig: B
direction: B
attCollisions: B
x
x
x
numCritFeatures: B
"""
Silf_pseudomap_format = """
>
unicode: L
nPseudo: H
"""
Silf_pseudomap_format_h = """
>
unicode: H
nPseudo: H
"""
Silf_classmap_format = """
>
numClass: H
numLinear: H
"""
Silf_lookupclass_format = """
>
numIDs: H
searchRange: H
entrySelector: H
rangeShift: H
"""
Silf_lookuppair_format = """
>
glyphId: H
index: H
"""
Silf_pass_format = """
>
flags: B
maxRuleLoop: B
maxRuleContext: B
maxBackup: B
numRules: H
fsmOffset: H
pcCode: L
rcCode: L
aCode: L
oDebug: L
numRows: H
numTransitional: H
numSuccess: H
numColumns: H
"""
aCode_info = (
("NOP", 0),
("PUSH_BYTE", "b"),
("PUSH_BYTE_U", "B"),
("PUSH_SHORT", ">h"),
("PUSH_SHORT_U", ">H"),
("PUSH_LONG", ">L"),
("ADD", 0),
("SUB", 0),
("MUL", 0),
("DIV", 0),
("MIN", 0),
("MAX", 0),
("NEG", 0),
("TRUNC8", 0),
("TRUNC16", 0),
("COND", 0),
("AND", 0), # x10
("OR", 0),
("NOT", 0),
("EQUAL", 0),
("NOT_EQ", 0),
("LESS", 0),
("GTR", 0),
("LESS_EQ", 0),
("GTR_EQ", 0),
("NEXT", 0),
("NEXT_N", "b"),
("COPY_NEXT", 0),
("PUT_GLYPH_8BIT_OBS", "B"),
("PUT_SUBS_8BIT_OBS", "bBB"),
("PUT_COPY", "b"),
("INSERT", 0),
("DELETE", 0), # x20
("ASSOC", -1),
("CNTXT_ITEM", "bB"),
("ATTR_SET", "B"),
("ATTR_ADD", "B"),
("ATTR_SUB", "B"),
("ATTR_SET_SLOT", "B"),
("IATTR_SET_SLOT", "BB"),
("PUSH_SLOT_ATTR", "Bb"),
("PUSH_GLYPH_ATTR_OBS", "Bb"),
("PUSH_GLYPH_METRIC", "Bbb"),
("PUSH_FEAT", "Bb"),
("PUSH_ATT_TO_GATTR_OBS", "Bb"),
("PUSH_ATT_TO_GLYPH_METRIC", "Bbb"),
("PUSH_ISLOT_ATTR", "Bbb"),
("PUSH_IGLYPH_ATTR", "Bbb"),
("POP_RET", 0), # x30
("RET_ZERO", 0),
("RET_TRUE", 0),
("IATTR_SET", "BB"),
("IATTR_ADD", "BB"),
("IATTR_SUB", "BB"),
("PUSH_PROC_STATE", "B"),
("PUSH_VERSION", 0),
("PUT_SUBS", ">bHH"),
("PUT_SUBS2", 0),
("PUT_SUBS3", 0),
("PUT_GLYPH", ">H"),
("PUSH_GLYPH_ATTR", ">Hb"),
("PUSH_ATT_TO_GLYPH_ATTR", ">Hb"),
("BITOR", 0),
("BITAND", 0),
("BITNOT", 0), # x40
("BITSET", ">HH"),
("SET_FEAT", "Bb"),
)
aCode_map = dict([(x[0], (i, x[1])) for i, x in enumerate(aCode_info)])
[docs]
def disassemble(aCode):
codelen = len(aCode)
pc = 0
res = []
while pc < codelen:
opcode = byteord(aCode[pc : pc + 1])
if opcode > len(aCode_info):
instr = aCode_info[0]
else:
instr = aCode_info[opcode]
pc += 1
if instr[1] != 0 and pc >= codelen:
return res
if instr[1] == -1:
count = byteord(aCode[pc])
fmt = "%dB" % count
pc += 1
elif instr[1] == 0:
fmt = ""
else:
fmt = instr[1]
if fmt == "":
res.append(instr[0])
continue
parms = struct.unpack_from(fmt, aCode[pc:])
res.append(instr[0] + "(" + ", ".join(map(str, parms)) + ")")
pc += struct.calcsize(fmt)
return res
instre = re.compile(r"^\s*([^(]+)\s*(?:\(([^)]+)\))?")
[docs]
def assemble(instrs):
res = b""
for inst in instrs:
m = instre.match(inst)
if not m or not m.group(1) in aCode_map:
continue
opcode, parmfmt = aCode_map[m.group(1)]
res += struct.pack("B", opcode)
if m.group(2):
if parmfmt == 0:
continue
parms = [int(x) for x in re.split(r",\s*", m.group(2))]
if parmfmt == -1:
l = len(parms)
res += struct.pack(("%dB" % (l + 1)), l, *parms)
else:
res += struct.pack(parmfmt, *parms)
return res
[docs]
def writecode(tag, writer, instrs):
writer.begintag(tag)
writer.newline()
for l in disassemble(instrs):
writer.write(l)
writer.newline()
writer.endtag(tag)
writer.newline()
[docs]
def readcode(content):
res = []
for e in content_string(content).split("\n"):
e = e.strip()
if not len(e):
continue
res.append(e)
return assemble(res)
attrs_info = (
"flags",
"extraAscent",
"extraDescent",
"maxGlyphID",
"numLigComp",
"numUserDefn",
"maxCompPerLig",
"direction",
"lbGID",
)
attrs_passindexes = ("iSubst", "iPos", "iJust", "iBidi")
attrs_contexts = ("maxPreContext", "maxPostContext")
attrs_attributes = (
"attrPseudo",
"attrBreakWeight",
"attrDirectionality",
"attrMirroring",
"attrSkipPasses",
"attCollisions",
)
pass_attrs_info = (
"flags",
"maxRuleLoop",
"maxRuleContext",
"maxBackup",
"minRulePreContext",
"maxRulePreContext",
"collisionThreshold",
)
pass_attrs_fsm = ("numRows", "numTransitional", "numSuccess", "numColumns")
[docs]
def writesimple(tag, self, writer, *attrkeys):
attrs = dict([(k, getattr(self, k)) for k in attrkeys])
writer.simpletag(tag, **attrs)
writer.newline()
[docs]
def getSimple(self, attrs, *attr_list):
for k in attr_list:
if k in attrs:
setattr(self, k, int(safeEval(attrs[k])))
[docs]
def content_string(contents):
res = ""
for element in contents:
if isinstance(element, tuple):
continue
res += element
return res.strip()
[docs]
def wrapline(writer, dat, length=80):
currline = ""
for d in dat:
if len(currline) > length:
writer.write(currline[:-1])
writer.newline()
currline = ""
currline += d + " "
if len(currline):
writer.write(currline[:-1])
writer.newline()
class _Object:
pass
[docs]
class table_S__i_l_f(DefaultTable.DefaultTable):
"""Silf table support"""
def __init__(self, tag=None):
DefaultTable.DefaultTable.__init__(self, tag)
self.silfs = []
[docs]
def decompile(self, data, ttFont):
sstruct.unpack2(Silf_hdr_format, data, self)
self.version = float(floatToFixedToStr(self.version, precisionBits=16))
if self.version >= 5.0:
(data, self.scheme) = grUtils.decompress(data)
sstruct.unpack2(Silf_hdr_format_3, data, self)
base = sstruct.calcsize(Silf_hdr_format_3)
elif self.version < 3.0:
self.numSilf = struct.unpack(">H", data[4:6])
self.scheme = 0
self.compilerVersion = 0
base = 8
else:
self.scheme = 0
sstruct.unpack2(Silf_hdr_format_3, data, self)
base = sstruct.calcsize(Silf_hdr_format_3)
silfoffsets = struct.unpack_from((">%dL" % self.numSilf), data[base:])
for offset in silfoffsets:
s = Silf()
self.silfs.append(s)
s.decompile(data[offset:], ttFont, self.version)
[docs]
def compile(self, ttFont):
self.numSilf = len(self.silfs)
if self.version < 3.0:
hdr = sstruct.pack(Silf_hdr_format, self)
hdr += struct.pack(">HH", self.numSilf, 0)
else:
hdr = sstruct.pack(Silf_hdr_format_3, self)
offset = len(hdr) + 4 * self.numSilf
data = b""
for s in self.silfs:
hdr += struct.pack(">L", offset)
subdata = s.compile(ttFont, self.version)
offset += len(subdata)
data += subdata
if self.version >= 5.0:
return grUtils.compress(self.scheme, hdr + data)
return hdr + data
[docs]
def toXML(self, writer, ttFont):
writer.comment("Attributes starting with _ are informative only")
writer.newline()
writer.simpletag(
"version",
version=self.version,
compilerVersion=self.compilerVersion,
compressionScheme=self.scheme,
)
writer.newline()
for s in self.silfs:
writer.begintag("silf")
writer.newline()
s.toXML(writer, ttFont, self.version)
writer.endtag("silf")
writer.newline()
[docs]
def fromXML(self, name, attrs, content, ttFont):
if name == "version":
self.scheme = int(safeEval(attrs["compressionScheme"]))
self.version = float(safeEval(attrs["version"]))
self.compilerVersion = int(safeEval(attrs["compilerVersion"]))
return
if name == "silf":
s = Silf()
self.silfs.append(s)
for element in content:
if not isinstance(element, tuple):
continue
tag, attrs, subcontent = element
s.fromXML(tag, attrs, subcontent, ttFont, self.version)
[docs]
class Silf(object):
"""A particular Silf subtable"""
def __init__(self):
self.passes = []
self.scriptTags = []
self.critFeatures = []
self.jLevels = []
self.pMap = {}
[docs]
def decompile(self, data, ttFont, version=2.0):
if version >= 3.0:
_, data = sstruct.unpack2(Silf_part1_format_v3, data, self)
self.ruleVersion = float(
floatToFixedToStr(self.ruleVersion, precisionBits=16)
)
_, data = sstruct.unpack2(Silf_part1_format, data, self)
for jlevel in range(self.numJLevels):
j, data = sstruct.unpack2(Silf_justify_format, data, _Object())
self.jLevels.append(j)
_, data = sstruct.unpack2(Silf_part2_format, data, self)
if self.numCritFeatures:
self.critFeatures = struct.unpack_from(
(">%dH" % self.numCritFeatures), data
)
data = data[self.numCritFeatures * 2 + 1 :]
(numScriptTag,) = struct.unpack_from("B", data)
if numScriptTag:
self.scriptTags = [
struct.unpack("4s", data[x : x + 4])[0].decode("ascii")
for x in range(1, 1 + 4 * numScriptTag, 4)
]
data = data[1 + 4 * numScriptTag :]
(self.lbGID,) = struct.unpack(">H", data[:2])
if self.numPasses:
self.oPasses = struct.unpack(
(">%dL" % (self.numPasses + 1)), data[2 : 6 + 4 * self.numPasses]
)
data = data[6 + 4 * self.numPasses :]
(numPseudo,) = struct.unpack(">H", data[:2])
for i in range(numPseudo):
if version >= 3.0:
pseudo = sstruct.unpack(
Silf_pseudomap_format, data[8 + 6 * i : 14 + 6 * i], _Object()
)
else:
pseudo = sstruct.unpack(
Silf_pseudomap_format_h, data[8 + 4 * i : 12 + 4 * i], _Object()
)
self.pMap[pseudo.unicode] = ttFont.getGlyphName(pseudo.nPseudo)
data = data[8 + 6 * numPseudo :]
currpos = (
sstruct.calcsize(Silf_part1_format)
+ sstruct.calcsize(Silf_justify_format) * self.numJLevels
+ sstruct.calcsize(Silf_part2_format)
+ 2 * self.numCritFeatures
+ 1
+ 1
+ 4 * numScriptTag
+ 6
+ 4 * self.numPasses
+ 8
+ 6 * numPseudo
)
if version >= 3.0:
currpos += sstruct.calcsize(Silf_part1_format_v3)
self.classes = Classes()
self.classes.decompile(data, ttFont, version)
for i in range(self.numPasses):
p = Pass()
self.passes.append(p)
p.decompile(
data[self.oPasses[i] - currpos : self.oPasses[i + 1] - currpos],
ttFont,
version,
)
[docs]
def compile(self, ttFont, version=2.0):
self.numPasses = len(self.passes)
self.numJLevels = len(self.jLevels)
self.numCritFeatures = len(self.critFeatures)
numPseudo = len(self.pMap)
data = b""
if version >= 3.0:
hdroffset = sstruct.calcsize(Silf_part1_format_v3)
else:
hdroffset = 0
data += sstruct.pack(Silf_part1_format, self)
for j in self.jLevels:
data += sstruct.pack(Silf_justify_format, j)
data += sstruct.pack(Silf_part2_format, self)
if self.numCritFeatures:
data += struct.pack((">%dH" % self.numCritFeaturs), *self.critFeatures)
data += struct.pack("BB", 0, len(self.scriptTags))
if len(self.scriptTags):
tdata = [struct.pack("4s", x.encode("ascii")) for x in self.scriptTags]
data += b"".join(tdata)
data += struct.pack(">H", self.lbGID)
self.passOffset = len(data)
data1 = grUtils.bininfo(numPseudo, 6)
currpos = hdroffset + len(data) + 4 * (self.numPasses + 1)
self.pseudosOffset = currpos + len(data1)
for u, p in sorted(self.pMap.items()):
data1 += struct.pack(
(">LH" if version >= 3.0 else ">HH"), u, ttFont.getGlyphID(p)
)
data1 += self.classes.compile(ttFont, version)
currpos += len(data1)
data2 = b""
datao = b""
for i, p in enumerate(self.passes):
base = currpos + len(data2)
datao += struct.pack(">L", base)
data2 += p.compile(ttFont, base, version)
datao += struct.pack(">L", currpos + len(data2))
if version >= 3.0:
data3 = sstruct.pack(Silf_part1_format_v3, self)
else:
data3 = b""
return data3 + data + datao + data1 + data2
[docs]
def toXML(self, writer, ttFont, version=2.0):
if version >= 3.0:
writer.simpletag("version", ruleVersion=self.ruleVersion)
writer.newline()
writesimple("info", self, writer, *attrs_info)
writesimple("passindexes", self, writer, *attrs_passindexes)
writesimple("contexts", self, writer, *attrs_contexts)
writesimple("attributes", self, writer, *attrs_attributes)
if len(self.jLevels):
writer.begintag("justifications")
writer.newline()
jformat, jnames, jfixes = sstruct.getformat(Silf_justify_format)
for i, j in enumerate(self.jLevels):
attrs = dict([(k, getattr(j, k)) for k in jnames])
writer.simpletag("justify", **attrs)
writer.newline()
writer.endtag("justifications")
writer.newline()
if len(self.critFeatures):
writer.begintag("critFeatures")
writer.newline()
writer.write(" ".join(map(str, self.critFeatures)))
writer.newline()
writer.endtag("critFeatures")
writer.newline()
if len(self.scriptTags):
writer.begintag("scriptTags")
writer.newline()
writer.write(" ".join(self.scriptTags))
writer.newline()
writer.endtag("scriptTags")
writer.newline()
if self.pMap:
writer.begintag("pseudoMap")
writer.newline()
for k, v in sorted(self.pMap.items()):
writer.simpletag("pseudo", unicode=hex(k), pseudo=v)
writer.newline()
writer.endtag("pseudoMap")
writer.newline()
self.classes.toXML(writer, ttFont, version)
if len(self.passes):
writer.begintag("passes")
writer.newline()
for i, p in enumerate(self.passes):
writer.begintag("pass", _index=i)
writer.newline()
p.toXML(writer, ttFont, version)
writer.endtag("pass")
writer.newline()
writer.endtag("passes")
writer.newline()
[docs]
def fromXML(self, name, attrs, content, ttFont, version=2.0):
if name == "version":
self.ruleVersion = float(safeEval(attrs.get("ruleVersion", "0")))
if name == "info":
getSimple(self, attrs, *attrs_info)
elif name == "passindexes":
getSimple(self, attrs, *attrs_passindexes)
elif name == "contexts":
getSimple(self, attrs, *attrs_contexts)
elif name == "attributes":
getSimple(self, attrs, *attrs_attributes)
elif name == "justifications":
for element in content:
if not isinstance(element, tuple):
continue
(tag, attrs, subcontent) = element
if tag == "justify":
j = _Object()
for k, v in attrs.items():
setattr(j, k, int(v))
self.jLevels.append(j)
elif name == "critFeatures":
self.critFeatures = []
element = content_string(content)
self.critFeatures.extend(map(int, element.split()))
elif name == "scriptTags":
self.scriptTags = []
element = content_string(content)
for n in element.split():
self.scriptTags.append(n)
elif name == "pseudoMap":
self.pMap = {}
for element in content:
if not isinstance(element, tuple):
continue
(tag, attrs, subcontent) = element
if tag == "pseudo":
k = int(attrs["unicode"], 16)
v = attrs["pseudo"]
self.pMap[k] = v
elif name == "classes":
self.classes = Classes()
for element in content:
if not isinstance(element, tuple):
continue
tag, attrs, subcontent = element
self.classes.fromXML(tag, attrs, subcontent, ttFont, version)
elif name == "passes":
for element in content:
if not isinstance(element, tuple):
continue
tag, attrs, subcontent = element
if tag == "pass":
p = Pass()
for e in subcontent:
if not isinstance(e, tuple):
continue
p.fromXML(e[0], e[1], e[2], ttFont, version)
self.passes.append(p)
[docs]
class Classes(object):
def __init__(self):
self.linear = []
self.nonLinear = []
[docs]
def decompile(self, data, ttFont, version=2.0):
sstruct.unpack2(Silf_classmap_format, data, self)
if version >= 4.0:
oClasses = struct.unpack(
(">%dL" % (self.numClass + 1)), data[4 : 8 + 4 * self.numClass]
)
else:
oClasses = struct.unpack(
(">%dH" % (self.numClass + 1)), data[4 : 6 + 2 * self.numClass]
)
for s, e in zip(oClasses[: self.numLinear], oClasses[1 : self.numLinear + 1]):
self.linear.append(
ttFont.getGlyphName(x)
for x in struct.unpack((">%dH" % ((e - s) / 2)), data[s:e])
)
for s, e in zip(
oClasses[self.numLinear : self.numClass],
oClasses[self.numLinear + 1 : self.numClass + 1],
):
nonLinids = [
struct.unpack(">HH", data[x : x + 4]) for x in range(s + 8, e, 4)
]
nonLin = dict([(ttFont.getGlyphName(x[0]), x[1]) for x in nonLinids])
self.nonLinear.append(nonLin)
[docs]
def compile(self, ttFont, version=2.0):
data = b""
oClasses = []
if version >= 4.0:
offset = 8 + 4 * (len(self.linear) + len(self.nonLinear))
else:
offset = 6 + 2 * (len(self.linear) + len(self.nonLinear))
for l in self.linear:
oClasses.append(len(data) + offset)
gs = [ttFont.getGlyphID(x) for x in l]
data += struct.pack((">%dH" % len(l)), *gs)
for l in self.nonLinear:
oClasses.append(len(data) + offset)
gs = [(ttFont.getGlyphID(x[0]), x[1]) for x in l.items()]
data += grUtils.bininfo(len(gs))
data += b"".join([struct.pack(">HH", *x) for x in sorted(gs)])
oClasses.append(len(data) + offset)
self.numClass = len(oClasses) - 1
self.numLinear = len(self.linear)
return (
sstruct.pack(Silf_classmap_format, self)
+ struct.pack(
((">%dL" if version >= 4.0 else ">%dH") % len(oClasses)), *oClasses
)
+ data
)
[docs]
def toXML(self, writer, ttFont, version=2.0):
writer.begintag("classes")
writer.newline()
writer.begintag("linearClasses")
writer.newline()
for i, l in enumerate(self.linear):
writer.begintag("linear", _index=i)
writer.newline()
wrapline(writer, l)
writer.endtag("linear")
writer.newline()
writer.endtag("linearClasses")
writer.newline()
writer.begintag("nonLinearClasses")
writer.newline()
for i, l in enumerate(self.nonLinear):
writer.begintag("nonLinear", _index=i + self.numLinear)
writer.newline()
for inp, ind in l.items():
writer.simpletag("map", glyph=inp, index=ind)
writer.newline()
writer.endtag("nonLinear")
writer.newline()
writer.endtag("nonLinearClasses")
writer.newline()
writer.endtag("classes")
writer.newline()
[docs]
def fromXML(self, name, attrs, content, ttFont, version=2.0):
if name == "linearClasses":
for element in content:
if not isinstance(element, tuple):
continue
tag, attrs, subcontent = element
if tag == "linear":
l = content_string(subcontent).split()
self.linear.append(l)
elif name == "nonLinearClasses":
for element in content:
if not isinstance(element, tuple):
continue
tag, attrs, subcontent = element
if tag == "nonLinear":
l = {}
for e in subcontent:
if not isinstance(e, tuple):
continue
tag, attrs, subsubcontent = e
if tag == "map":
l[attrs["glyph"]] = int(safeEval(attrs["index"]))
self.nonLinear.append(l)
[docs]
class Pass(object):
def __init__(self):
self.colMap = {}
self.rules = []
self.rulePreContexts = []
self.ruleSortKeys = []
self.ruleConstraints = []
self.passConstraints = b""
self.actions = []
self.stateTrans = []
self.startStates = []
[docs]
def decompile(self, data, ttFont, version=2.0):
_, data = sstruct.unpack2(Silf_pass_format, data, self)
(numRange, _, _, _) = struct.unpack(">4H", data[:8])
data = data[8:]
for i in range(numRange):
(first, last, col) = struct.unpack(">3H", data[6 * i : 6 * i + 6])
for g in range(first, last + 1):
self.colMap[ttFont.getGlyphName(g)] = col
data = data[6 * numRange :]
oRuleMap = struct.unpack_from((">%dH" % (self.numSuccess + 1)), data)
data = data[2 + 2 * self.numSuccess :]
rules = struct.unpack_from((">%dH" % oRuleMap[-1]), data)
self.rules = [rules[s:e] for (s, e) in zip(oRuleMap, oRuleMap[1:])]
data = data[2 * oRuleMap[-1] :]
(self.minRulePreContext, self.maxRulePreContext) = struct.unpack("BB", data[:2])
numStartStates = self.maxRulePreContext - self.minRulePreContext + 1
self.startStates = struct.unpack(
(">%dH" % numStartStates), data[2 : 2 + numStartStates * 2]
)
data = data[2 + numStartStates * 2 :]
self.ruleSortKeys = struct.unpack(
(">%dH" % self.numRules), data[: 2 * self.numRules]
)
data = data[2 * self.numRules :]
self.rulePreContexts = struct.unpack(
("%dB" % self.numRules), data[: self.numRules]
)
data = data[self.numRules :]
(self.collisionThreshold, pConstraint) = struct.unpack(">BH", data[:3])
oConstraints = list(
struct.unpack(
(">%dH" % (self.numRules + 1)), data[3 : 5 + self.numRules * 2]
)
)
data = data[5 + self.numRules * 2 :]
oActions = list(
struct.unpack((">%dH" % (self.numRules + 1)), data[: 2 + self.numRules * 2])
)
data = data[2 * self.numRules + 2 :]
for i in range(self.numTransitional):
a = array(
"H", data[i * self.numColumns * 2 : (i + 1) * self.numColumns * 2]
)
if sys.byteorder != "big":
a.byteswap()
self.stateTrans.append(a)
data = data[self.numTransitional * self.numColumns * 2 + 1 :]
self.passConstraints = data[:pConstraint]
data = data[pConstraint:]
for i in range(len(oConstraints) - 2, -1, -1):
if oConstraints[i] == 0:
oConstraints[i] = oConstraints[i + 1]
self.ruleConstraints = [
(data[s:e] if (e - s > 1) else b"")
for (s, e) in zip(oConstraints, oConstraints[1:])
]
data = data[oConstraints[-1] :]
self.actions = [
(data[s:e] if (e - s > 1) else "") for (s, e) in zip(oActions, oActions[1:])
]
data = data[oActions[-1] :]
# not using debug
[docs]
def compile(self, ttFont, base, version=2.0):
# build it all up backwards
oActions = reduce(
lambda a, x: (a[0] + len(x), a[1] + [a[0]]), self.actions + [b""], (0, [])
)[1]
oConstraints = reduce(
lambda a, x: (a[0] + len(x), a[1] + [a[0]]),
self.ruleConstraints + [b""],
(1, []),
)[1]
constraintCode = b"\000" + b"".join(self.ruleConstraints)
transes = []
for t in self.stateTrans:
if sys.byteorder != "big":
t.byteswap()
transes.append(t.tobytes())
if sys.byteorder != "big":
t.byteswap()
if not len(transes):
self.startStates = [0]
oRuleMap = reduce(
lambda a, x: (a[0] + len(x), a[1] + [a[0]]), self.rules + [[]], (0, [])
)[1]
passRanges = []
gidcolmap = dict([(ttFont.getGlyphID(x[0]), x[1]) for x in self.colMap.items()])
for e in grUtils.entries(gidcolmap, sameval=True):
if e[1]:
passRanges.append((e[0], e[0] + e[1] - 1, e[2][0]))
self.numRules = len(self.actions)
self.fsmOffset = (
sstruct.calcsize(Silf_pass_format)
+ 8
+ len(passRanges) * 6
+ len(oRuleMap) * 2
+ 2 * oRuleMap[-1]
+ 2
+ 2 * len(self.startStates)
+ 3 * self.numRules
+ 3
+ 4 * self.numRules
+ 4
)
self.pcCode = (
self.fsmOffset + 2 * self.numTransitional * self.numColumns + 1 + base
)
self.rcCode = self.pcCode + len(self.passConstraints)
self.aCode = self.rcCode + len(constraintCode)
self.oDebug = 0
# now generate output
data = sstruct.pack(Silf_pass_format, self)
data += grUtils.bininfo(len(passRanges), 6)
data += b"".join(struct.pack(">3H", *p) for p in passRanges)
data += struct.pack((">%dH" % len(oRuleMap)), *oRuleMap)
flatrules = reduce(lambda a, x: a + x, self.rules, [])
data += struct.pack((">%dH" % oRuleMap[-1]), *flatrules)
data += struct.pack("BB", self.minRulePreContext, self.maxRulePreContext)
data += struct.pack((">%dH" % len(self.startStates)), *self.startStates)
data += struct.pack((">%dH" % self.numRules), *self.ruleSortKeys)
data += struct.pack(("%dB" % self.numRules), *self.rulePreContexts)
data += struct.pack(">BH", self.collisionThreshold, len(self.passConstraints))
data += struct.pack((">%dH" % (self.numRules + 1)), *oConstraints)
data += struct.pack((">%dH" % (self.numRules + 1)), *oActions)
return (
data
+ b"".join(transes)
+ struct.pack("B", 0)
+ self.passConstraints
+ constraintCode
+ b"".join(self.actions)
)
[docs]
def toXML(self, writer, ttFont, version=2.0):
writesimple("info", self, writer, *pass_attrs_info)
writesimple("fsminfo", self, writer, *pass_attrs_fsm)
writer.begintag("colmap")
writer.newline()
wrapline(
writer,
[
"{}={}".format(*x)
for x in sorted(
self.colMap.items(), key=lambda x: ttFont.getGlyphID(x[0])
)
],
)
writer.endtag("colmap")
writer.newline()
writer.begintag("staterulemap")
writer.newline()
for i, r in enumerate(self.rules):
writer.simpletag(
"state",
number=self.numRows - self.numSuccess + i,
rules=" ".join(map(str, r)),
)
writer.newline()
writer.endtag("staterulemap")
writer.newline()
writer.begintag("rules")
writer.newline()
for i in range(len(self.actions)):
writer.begintag(
"rule",
index=i,
precontext=self.rulePreContexts[i],
sortkey=self.ruleSortKeys[i],
)
writer.newline()
if len(self.ruleConstraints[i]):
writecode("constraint", writer, self.ruleConstraints[i])
writecode("action", writer, self.actions[i])
writer.endtag("rule")
writer.newline()
writer.endtag("rules")
writer.newline()
if len(self.passConstraints):
writecode("passConstraint", writer, self.passConstraints)
if len(self.stateTrans):
writer.begintag("fsm")
writer.newline()
writer.begintag("starts")
writer.write(" ".join(map(str, self.startStates)))
writer.endtag("starts")
writer.newline()
for i, s in enumerate(self.stateTrans):
writer.begintag("row", _i=i)
# no newlines here
writer.write(" ".join(map(str, s)))
writer.endtag("row")
writer.newline()
writer.endtag("fsm")
writer.newline()
[docs]
def fromXML(self, name, attrs, content, ttFont, version=2.0):
if name == "info":
getSimple(self, attrs, *pass_attrs_info)
elif name == "fsminfo":
getSimple(self, attrs, *pass_attrs_fsm)
elif name == "colmap":
e = content_string(content)
for w in e.split():
x = w.split("=")
if len(x) != 2 or x[0] == "" or x[1] == "":
continue
self.colMap[x[0]] = int(x[1])
elif name == "staterulemap":
for e in content:
if not isinstance(e, tuple):
continue
tag, a, c = e
if tag == "state":
self.rules.append([int(x) for x in a["rules"].split(" ")])
elif name == "rules":
for element in content:
if not isinstance(element, tuple):
continue
tag, a, c = element
if tag != "rule":
continue
self.rulePreContexts.append(int(a["precontext"]))
self.ruleSortKeys.append(int(a["sortkey"]))
con = b""
act = b""
for e in c:
if not isinstance(e, tuple):
continue
tag, a, subc = e
if tag == "constraint":
con = readcode(subc)
elif tag == "action":
act = readcode(subc)
self.actions.append(act)
self.ruleConstraints.append(con)
elif name == "passConstraint":
self.passConstraints = readcode(content)
elif name == "fsm":
for element in content:
if not isinstance(element, tuple):
continue
tag, a, c = element
if tag == "row":
s = array("H")
e = content_string(c)
s.extend(map(int, e.split()))
self.stateTrans.append(s)
elif tag == "starts":
s = []
e = content_string(c)
s.extend(map(int, e.split()))
self.startStates = s