884 lines
32 KiB
Python
884 lines
32 KiB
Python
from fontTools.misc.py23 import *
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from fontTools.misc import sstruct
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from fontTools.misc.textTools import safeEval
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from itertools import *
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from . import DefaultTable
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from . import grUtils
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from array import array
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from functools import reduce
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import struct, operator, warnings, re, sys
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Silf_hdr_format = '''
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>
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version: 16.16F
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'''
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Silf_hdr_format_3 = '''
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>
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version: 16.16F
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compilerVersion: L
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numSilf: H
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x
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x
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'''
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Silf_part1_format_v3 = '''
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>
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ruleVersion: 16.16F
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passOffset: H
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pseudosOffset: H
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'''
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Silf_part1_format = '''
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>
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maxGlyphID: H
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extraAscent: h
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extraDescent: h
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numPasses: B
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iSubst: B
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iPos: B
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iJust: B
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iBidi: B
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flags: B
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maxPreContext: B
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maxPostContext: B
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attrPseudo: B
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attrBreakWeight: B
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attrDirectionality: B
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attrMirroring: B
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attrSkipPasses: B
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numJLevels: B
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'''
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Silf_justify_format = '''
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>
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attrStretch: B
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attrShrink: B
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attrStep: B
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attrWeight: B
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runto: B
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x
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x
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x
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'''
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Silf_part2_format = '''
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>
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numLigComp: H
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numUserDefn: B
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maxCompPerLig: B
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direction: B
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attCollisions: B
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x
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x
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x
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numCritFeatures: B
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'''
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Silf_pseudomap_format = '''
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>
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unicode: L
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nPseudo: H
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'''
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Silf_pseudomap_format_h = '''
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>
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unicode: H
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nPseudo: H
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'''
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Silf_classmap_format = '''
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>
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numClass: H
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numLinear: H
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'''
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Silf_lookupclass_format = '''
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>
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numIDs: H
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searchRange: H
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entrySelector: H
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rangeShift: H
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'''
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Silf_lookuppair_format = '''
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>
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glyphId: H
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index: H
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'''
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Silf_pass_format = '''
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>
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flags: B
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maxRuleLoop: B
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maxRuleContext: B
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maxBackup: B
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numRules: H
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fsmOffset: H
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pcCode: L
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rcCode: L
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aCode: L
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oDebug: L
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numRows: H
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numTransitional: H
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numSuccess: H
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numColumns: H
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'''
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aCode_info = (
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("NOP", 0),
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("PUSH_BYTE", "b"),
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("PUSH_BYTE_U", "B"),
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("PUSH_SHORT", ">h"),
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("PUSH_SHORT_U", ">H"),
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("PUSH_LONG", ">L"),
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("ADD", 0),
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("SUB", 0),
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("MUL", 0),
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("DIV", 0),
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("MIN", 0),
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("MAX", 0),
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("NEG", 0),
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("TRUNC8", 0),
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("TRUNC16", 0),
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("COND", 0),
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("AND", 0), # x10
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("OR", 0),
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("NOT", 0),
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("EQUAL", 0),
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("NOT_EQ", 0),
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("LESS", 0),
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("GTR", 0),
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("LESS_EQ", 0),
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("GTR_EQ", 0),
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("NEXT", 0),
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("NEXT_N", "b"),
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("COPY_NEXT", 0),
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("PUT_GLYPH_8BIT_OBS", "B"),
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("PUT_SUBS_8BIT_OBS", "bBB"),
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("PUT_COPY", "b"),
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("INSERT", 0),
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("DELETE", 0), # x20
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("ASSOC", -1),
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("CNTXT_ITEM", "bB"),
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("ATTR_SET", "B"),
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("ATTR_ADD", "B"),
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("ATTR_SUB", "B"),
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("ATTR_SET_SLOT", "B"),
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("IATTR_SET_SLOT", "BB"),
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("PUSH_SLOT_ATTR", "Bb"),
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("PUSH_GLYPH_ATTR_OBS", "Bb"),
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("PUSH_GLYPH_METRIC", "Bbb"),
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("PUSH_FEAT", "Bb"),
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("PUSH_ATT_TO_GATTR_OBS", "Bb"),
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("PUSH_ATT_TO_GLYPH_METRIC", "Bbb"),
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("PUSH_ISLOT_ATTR", "Bbb"),
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("PUSH_IGLYPH_ATTR", "Bbb"),
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("POP_RET", 0), # x30
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("RET_ZERO", 0),
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("RET_TRUE", 0),
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("IATTR_SET", "BB"),
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("IATTR_ADD", "BB"),
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("IATTR_SUB", "BB"),
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("PUSH_PROC_STATE", "B"),
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("PUSH_VERSION", 0),
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("PUT_SUBS", ">bHH"),
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("PUT_SUBS2", 0),
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("PUT_SUBS3", 0),
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("PUT_GLYPH", ">H"),
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("PUSH_GLYPH_ATTR", ">Hb"),
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("PUSH_ATT_TO_GLYPH_ATTR", ">Hb"),
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("BITOR", 0),
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("BITAND", 0),
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("BITNOT", 0), # x40
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("BITSET", ">HH"),
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("SET_FEAT", "Bb")
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)
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aCode_map = dict([(x[0], (i, x[1])) for i,x in enumerate(aCode_info)])
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def disassemble(aCode):
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codelen = len(aCode)
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pc = 0
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res = []
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while pc < codelen:
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opcode = byteord(aCode[pc:pc+1])
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if opcode > len(aCode_info):
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instr = aCode_info[0]
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else:
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instr = aCode_info[opcode]
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pc += 1
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if instr[1] != 0 and pc >= codelen : return res
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if instr[1] == -1:
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count = byteord(aCode[pc])
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fmt = "%dB" % count
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pc += 1
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elif instr[1] == 0:
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fmt = ""
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else :
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fmt = instr[1]
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if fmt == "":
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res.append(instr[0])
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continue
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parms = struct.unpack_from(fmt, aCode[pc:])
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res.append(instr[0] + "(" + ", ".join(map(str, parms)) + ")")
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pc += struct.calcsize(fmt)
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return res
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instre = re.compile(r"^\s*([^(]+)\s*(?:\(([^)]+)\))?")
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def assemble(instrs):
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res = b""
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for inst in instrs:
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m = instre.match(inst)
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if not m or not m.group(1) in aCode_map:
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continue
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opcode, parmfmt = aCode_map[m.group(1)]
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res += struct.pack("B", opcode)
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if m.group(2):
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if parmfmt == 0:
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continue
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parms = [int(x) for x in re.split(r",\s*", m.group(2))]
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if parmfmt == -1:
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l = len(parms)
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res += struct.pack(("%dB" % (l+1)), l, *parms)
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else:
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res += struct.pack(parmfmt, *parms)
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return res
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def writecode(tag, writer, instrs):
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writer.begintag(tag)
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writer.newline()
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for l in disassemble(instrs):
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writer.write(l)
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writer.newline()
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writer.endtag(tag)
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writer.newline()
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def readcode(content):
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res = []
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for e in content_string(content).split('\n'):
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e = e.strip()
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if not len(e): continue
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res.append(e)
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return assemble(res)
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attrs_info=('flags', 'extraAscent', 'extraDescent', 'maxGlyphID',
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'numLigComp', 'numUserDefn', 'maxCompPerLig', 'direction', 'lbGID')
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attrs_passindexes = ('iSubst', 'iPos', 'iJust', 'iBidi')
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attrs_contexts = ('maxPreContext', 'maxPostContext')
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attrs_attributes = ('attrPseudo', 'attrBreakWeight', 'attrDirectionality',
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'attrMirroring', 'attrSkipPasses', 'attCollisions')
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pass_attrs_info = ('flags', 'maxRuleLoop', 'maxRuleContext', 'maxBackup',
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'minRulePreContext', 'maxRulePreContext', 'collisionThreshold')
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pass_attrs_fsm = ('numRows', 'numTransitional', 'numSuccess', 'numColumns')
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def writesimple(tag, self, writer, *attrkeys):
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attrs = dict([(k, getattr(self, k)) for k in attrkeys])
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writer.simpletag(tag, **attrs)
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writer.newline()
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def getSimple(self, attrs, *attr_list):
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for k in attr_list:
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if k in attrs:
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setattr(self, k, int(safeEval(attrs[k])))
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def content_string(contents):
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res = ""
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for element in contents:
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if isinstance(element, tuple): continue
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res += element
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return res.strip()
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def wrapline(writer, dat, length=80):
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currline = ""
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for d in dat:
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if len(currline) > length:
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writer.write(currline[:-1])
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writer.newline()
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currline = ""
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currline += d + " "
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if len(currline):
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writer.write(currline[:-1])
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writer.newline()
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class _Object() :
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pass
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class table_S__i_l_f(DefaultTable.DefaultTable):
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'''Silf table support'''
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def __init__(self, tag=None):
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DefaultTable.DefaultTable.__init__(self, tag)
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self.silfs = []
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def decompile(self, data, ttFont):
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sstruct.unpack2(Silf_hdr_format, data, self)
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if self.version >= 5.0:
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(data, self.scheme) = grUtils.decompress(data)
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sstruct.unpack2(Silf_hdr_format_3, data, self)
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base = sstruct.calcsize(Silf_hdr_format_3)
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elif self.version < 3.0:
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self.numSilf = struct.unpack('>H', data[4:6])
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self.scheme = 0
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self.compilerVersion = 0
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base = 8
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else:
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self.scheme = 0
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sstruct.unpack2(Silf_hdr_format_3, data, self)
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base = sstruct.calcsize(Silf_hdr_format_3)
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silfoffsets = struct.unpack_from(('>%dL' % self.numSilf), data[base:])
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for offset in silfoffsets:
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s = Silf()
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self.silfs.append(s)
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s.decompile(data[offset:], ttFont, self.version)
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def compile(self, ttFont):
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self.numSilf = len(self.silfs)
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if self.version < 3.0:
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hdr = sstruct.pack(Silf_hdr_format, self)
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hdr += struct.pack(">HH", self.numSilf, 0)
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else:
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hdr = sstruct.pack(Silf_hdr_format_3, self)
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offset = len(hdr) + 4 * self.numSilf
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data = b""
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for s in self.silfs:
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hdr += struct.pack(">L", offset)
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subdata = s.compile(ttFont, self.version)
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offset += len(subdata)
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data += subdata
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if self.version >= 5.0:
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return grUtils.compress(self.scheme, hdr+data)
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return hdr+data
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def toXML(self, writer, ttFont):
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writer.comment('Attributes starting with _ are informative only')
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writer.newline()
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writer.simpletag('version', version=self.version,
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compilerVersion=self.compilerVersion, compressionScheme=self.scheme)
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writer.newline()
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for s in self.silfs:
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writer.begintag('silf')
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writer.newline()
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s.toXML(writer, ttFont, self.version)
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writer.endtag('silf')
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writer.newline()
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def fromXML(self, name, attrs, content, ttFont):
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if name == 'version':
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self.scheme=int(safeEval(attrs['compressionScheme']))
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self.version = float(safeEval(attrs['version']))
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self.compilerVersion = int(safeEval(attrs['compilerVersion']))
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return
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if name == 'silf':
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s = Silf()
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self.silfs.append(s)
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for element in content:
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if not isinstance(element, tuple): continue
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tag, attrs, subcontent = element
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s.fromXML(tag, attrs, subcontent, ttFont, self.version)
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class Silf(object):
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'''A particular Silf subtable'''
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def __init__(self):
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self.passes = []
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self.scriptTags = []
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self.critFeatures = []
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self.jLevels = []
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self.pMap = {}
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def decompile(self, data, ttFont, version=2.0):
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if version >= 3.0 :
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_, data = sstruct.unpack2(Silf_part1_format_v3, data, self)
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_, data = sstruct.unpack2(Silf_part1_format, data, self)
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for jlevel in range(self.numJLevels):
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j, data = sstruct.unpack2(Silf_justify_format, data, _Object())
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self.jLevels.append(j)
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_, data = sstruct.unpack2(Silf_part2_format, data, self)
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if self.numCritFeatures:
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self.critFeatures = struct.unpack_from(('>%dH' % self.numCritFeatures), data)
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data = data[self.numCritFeatures * 2 + 1:]
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(numScriptTag,) = struct.unpack_from('B', data)
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if numScriptTag:
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self.scriptTags = [struct.unpack("4s", data[x:x+4])[0].decode("ascii") for x in range(1, 1 + 4 * numScriptTag, 4)]
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data = data[1 + 4 * numScriptTag:]
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(self.lbGID,) = struct.unpack('>H', data[:2])
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if self.numPasses:
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self.oPasses = struct.unpack(('>%dL' % (self.numPasses+1)), data[2:6+4*self.numPasses])
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data = data[6 + 4 * self.numPasses:]
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(numPseudo,) = struct.unpack(">H", data[:2])
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for i in range(numPseudo):
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if version >= 3.0:
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pseudo = sstruct.unpack(Silf_pseudomap_format, data[8+6*i:14+6*i], _Object())
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else:
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pseudo = sstruct.unpack(Silf_pseudomap_format_h, data[8+4*i:12+4*i], _Object())
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self.pMap[pseudo.unicode] = ttFont.getGlyphName(pseudo.nPseudo)
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data = data[8 + 6 * numPseudo:]
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currpos = (sstruct.calcsize(Silf_part1_format)
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+ sstruct.calcsize(Silf_justify_format) * self.numJLevels
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+ sstruct.calcsize(Silf_part2_format) + 2 * self.numCritFeatures
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+ 1 + 1 + 4 * numScriptTag + 6 + 4 * self.numPasses + 8 + 6 * numPseudo)
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if version >= 3.0:
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currpos += sstruct.calcsize(Silf_part1_format_v3)
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self.classes = Classes()
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self.classes.decompile(data, ttFont, version)
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for i in range(self.numPasses):
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p = Pass()
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self.passes.append(p)
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p.decompile(data[self.oPasses[i]-currpos:self.oPasses[i+1]-currpos],
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ttFont, version)
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def compile(self, ttFont, version=2.0):
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self.numPasses = len(self.passes)
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self.numJLevels = len(self.jLevels)
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self.numCritFeatures = len(self.critFeatures)
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numPseudo = len(self.pMap)
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data = b""
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if version >= 3.0:
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hdroffset = sstruct.calcsize(Silf_part1_format_v3)
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else:
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hdroffset = 0
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data += sstruct.pack(Silf_part1_format, self)
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for j in self.jLevels:
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data += sstruct.pack(Silf_justify_format, j)
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data += sstruct.pack(Silf_part2_format, self)
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if self.numCritFeatures:
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data += struct.pack((">%dH" % self.numCritFeaturs), *self.critFeatures)
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data += struct.pack("BB", 0, len(self.scriptTags))
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if len(self.scriptTags):
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tdata = [struct.pack("4s", x.encode("ascii")) for x in self.scriptTags]
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data += b"".join(tdata)
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data += struct.pack(">H", self.lbGID)
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self.passOffset = len(data)
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data1 = grUtils.bininfo(numPseudo, 6)
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currpos = hdroffset + len(data) + 4 * (self.numPasses + 1)
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self.pseudosOffset = currpos + len(data1)
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for u, p in sorted(self.pMap.items()):
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data1 += struct.pack((">LH" if version >= 3.0 else ">HH"),
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u, ttFont.getGlyphID(p))
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data1 += self.classes.compile(ttFont, version)
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currpos += len(data1)
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data2 = b""
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datao = b""
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for i, p in enumerate(self.passes):
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base = currpos + len(data2)
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datao += struct.pack(">L", base)
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data2 += p.compile(ttFont, base, version)
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datao += struct.pack(">L", currpos + len(data2))
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if version >= 3.0:
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data3 = sstruct.pack(Silf_part1_format_v3, self)
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else:
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data3 = b""
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return data3 + data + datao + data1 + data2
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def toXML(self, writer, ttFont, version=2.0):
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if version >= 3.0:
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writer.simpletag('version', ruleVersion=self.ruleVersion)
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writer.newline()
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writesimple('info', self, writer, *attrs_info)
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writesimple('passindexes', self, writer, *attrs_passindexes)
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writesimple('contexts', self, writer, *attrs_contexts)
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writesimple('attributes', self, writer, *attrs_attributes)
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if len(self.jLevels):
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writer.begintag('justifications')
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writer.newline()
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jformat, jnames, jfixes = sstruct.getformat(Silf_justify_format)
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for i, j in enumerate(self.jLevels):
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attrs = dict([(k, getattr(j, k)) for k in jnames])
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writer.simpletag('justify', **attrs)
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writer.newline()
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writer.endtag('justifications')
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writer.newline()
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if len(self.critFeatures):
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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()
|
|
|
|
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)
|
|
|
|
|
|
class Classes(object):
|
|
|
|
def __init__(self):
|
|
self.linear = []
|
|
self.nonLinear = []
|
|
|
|
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)
|
|
|
|
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
|
|
|
|
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()
|
|
|
|
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)
|
|
|
|
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 = []
|
|
|
|
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
|
|
|
|
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)
|
|
|
|
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()
|
|
|
|
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
|
|
|