96 lines
2.8 KiB
Python
96 lines
2.8 KiB
Python
from __future__ import print_function, division
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from fontTools.misc.py23 import *
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from fontTools.misc import sstruct
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from fontTools.misc.textTools import safeEval, num2binary, binary2num
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from . import DefaultTable
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import time
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import calendar
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headFormat = """
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> # big endian
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tableVersion: 16.16F
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fontRevision: 16.16F
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checkSumAdjustment: I
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magicNumber: I
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flags: H
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unitsPerEm: H
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created: Q
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modified: Q
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xMin: h
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yMin: h
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xMax: h
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yMax: h
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macStyle: H
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lowestRecPPEM: H
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fontDirectionHint: h
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indexToLocFormat: h
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glyphDataFormat: h
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"""
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class table__h_e_a_d(DefaultTable.DefaultTable):
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dependencies = ['maxp', 'loca']
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def decompile(self, data, ttFont):
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dummy, rest = sstruct.unpack2(headFormat, data, self)
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if rest:
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# this is quite illegal, but there seem to be fonts out there that do this
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assert rest == "\0\0"
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def compile(self, ttFont):
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self.modified = int(time.time() - mac_epoch_diff)
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data = sstruct.pack(headFormat, self)
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return data
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def toXML(self, writer, ttFont):
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writer.comment("Most of this table will be recalculated by the compiler")
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writer.newline()
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formatstring, names, fixes = sstruct.getformat(headFormat)
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for name in names:
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value = getattr(self, name)
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if name in ("created", "modified"):
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try:
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value = time.asctime(time.gmtime(max(0, value + mac_epoch_diff)))
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except ValueError:
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value = time.asctime(time.gmtime(0))
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if name in ("magicNumber", "checkSumAdjustment"):
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if value < 0:
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value = value + 0x100000000
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value = hex(value)
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if value[-1:] == "L":
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value = value[:-1]
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elif name in ("macStyle", "flags"):
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value = num2binary(value, 16)
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writer.simpletag(name, value=value)
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writer.newline()
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def fromXML(self, name, attrs, content, ttFont):
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value = attrs["value"]
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if name in ("created", "modified"):
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value = calendar.timegm(time.strptime(value)) - mac_epoch_diff
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elif name in ("macStyle", "flags"):
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value = binary2num(value)
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else:
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value = safeEval(value)
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setattr(self, name, value)
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def calc_mac_epoch_diff():
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"""calculate the difference between the original Mac epoch (1904)
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to the epoch on this machine.
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"""
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safe_epoch_t = (1972, 1, 1, 0, 0, 0, 0, 0, 0)
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safe_epoch = time.mktime(safe_epoch_t) - time.timezone
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# This assert fails in certain time zones, with certain daylight settings
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#assert time.gmtime(safe_epoch)[:6] == safe_epoch_t[:6]
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seconds1904to1972 = 60 * 60 * 24 * (365 * (1972-1904) + 17) # thanks, Laurence!
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return int(safe_epoch - seconds1904to1972)
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mac_epoch_diff = calc_mac_epoch_diff()
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_months = [' ', 'jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
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'sep', 'oct', 'nov', 'dec']
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_weekdays = ['mon', 'tue', 'wed', 'thu', 'fri', 'sat', 'sun']
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