am 8e11659a: Change font family name. [DO NOT MERGE]

"""

import glob

from multiprocessing import Pool

import os

import re

import shutil

import sys

import xml.etree.ElementTree as etree

# Prevent .pyc files from being created.

sys.dont_write_bytecode = True

# fontTools is available at platform/external/fonttools

from fontTools import ttx

import re

import os

import xml.etree.ElementTree as etree

import shutil

import glob

from multiprocessing import Pool

# global variable

dest_dir = '/tmp'

class FontInfo(object):

  family = None

  style = None

  version = None

  ends_in_regular = False

  fullname = None

class InvalidFontException(Exception):

  pass

# These constants represent the value of nameID parameter in the namerecord for

# different information.

# see http://scripts.sil.org/cms/scripts/page.php?item_id=IWS-Chapter08#3054f18b

NAMEID_FAMILY = 1

NAMEID_STYLE = 2

NAMEID_FULLNAME = 4

NAMEID_VERSION = 5

def main(argv):

  if len(argv) < 2:

    sys.exit('Usage: build_font.py /path/to/input_fonts/ /path/to/out/dir/')

      for filename in filenames:

        input_path = os.path.join(dirname, filename)

        extension = os.path.splitext(filename)[1].lower()

          if (extension == '.ttf'):

        if extension == '.ttf':

          input_fonts.append(input_path)

          elif (extension == '.xml'):

        elif extension == '.xml':

          shutil.copy(input_path, dest_dir)

      if '.git' in dirnames:

        # don't go into any .git directories.

  pool.map(convert_font, input_fonts)

class InvalidFontException(Exception):

  pass

def convert_font(input_path):

  filename = os.path.basename(input_path)

  print 'Converting font: ' + filename

    tree = etree.parse(ttx_path)

    root = tree.getroot()

    for name in root.iter('name'):

      [old_ps_name, version] = get_font_info(name)

      if old_ps_name is not None and version is not None:

        new_ps_name = old_ps_name + version

        update_name(name, new_ps_name)

      update_tag(name, get_font_info(name))

    tree.write(ttx_path, xml_declaration=True, encoding='utf-8')

    # generate the udpated font now.

    ttx_args = ['-q', '-d', dest_dir, ttx_path]

  except OSError:

    pass

def get_font_info(tag):

  ps_name = None

  ps_version = None

  """ Returns a list of FontInfo representing the various sets of namerecords

      found in the name table of the font. """

  fonts = []

  font = None

  last_name_id = sys.maxint

  for namerecord in tag.iter('namerecord'):

    if 'nameID' in namerecord.attrib:

      name_id = int(namerecord.attrib['nameID'])

      # A new font should be created for each platform, encoding and language

      # id. But, since the nameIDs are sorted, we use the easy approach of

      # creating a new one when the nameIDs reset.

      if name_id <= last_name_id and font is not None:

        fonts.append(font)

        font = None

      last_name_id = name_id

      if font is None:

        font = FontInfo()

      if name_id == NAMEID_FAMILY:

        font.family = namerecord.text.strip()

      if name_id == NAMEID_STYLE:

        font.style = namerecord.text.strip()

      if name_id == NAMEID_FULLNAME:

        font.ends_in_regular = ends_in_regular(namerecord.text)

        font.fullname = namerecord.text.strip()

      if name_id == NAMEID_VERSION:

        font.version = get_version(namerecord.text)

  if font is not None:

    fonts.append(font)

  return fonts

def update_tag(tag, fonts):

  last_name_id = sys.maxint

  fonts_iterator = fonts.__iter__()

  font = None

  for namerecord in tag.iter('namerecord'):

    if 'nameID' in namerecord.attrib:

      # if the tag has nameID=6, it is the postscript name of the font.

      # see: http://scripts.sil.org/cms/scripts/page.php?item_id=IWS-Chapter08#3054f18b

      if namerecord.attrib['nameID'] == '6':

        if ps_name is not None:

          if not sanitize(namerecord.text) == ps_name:

            raise InvalidFontException('found multiple possibilities of the font name')

      name_id = int(namerecord.attrib['nameID'])

      if name_id <= last_name_id:

        font = fonts_iterator.next()

        font = update_font_name(font)

      last_name_id = name_id

      if name_id == NAMEID_FAMILY:

        namerecord.text = font.family

      if name_id == NAMEID_FULLNAME:

        namerecord.text = font.fullname

def update_font_name(font):

  """ Compute the new font family name and font fullname. If the font has a

      valid version, it's sanitized and appended to the font family name. The

      font fullname is then created by joining the new family name and the

      style. If the style is 'Regular', it is appended only if the original font

      had it. """

  if font.family is None or font.style is None:

    raise InvalidFontException('Font doesn\'t have proper family name or style')

  if font.version is not None:

    new_family = font.family + font.version

  else:

          ps_name = sanitize(namerecord.text)

      # nameID=5 means the font version

      if namerecord.attrib['nameID'] == '5':

        if ps_version is not None:

          if not ps_version == get_version(namerecord.text):

            raise InvalidFontException('found multiple possibilities of the font version')

    new_family = font.family

  if font.style is 'Regular' and not font.ends_in_regular:

    font.fullname = new_family

  else:

          ps_version = get_version(namerecord.text)

  return [ps_name, ps_version]

    font.fullname = new_family + ' ' + font.style

  font.family = new_family

  return font

def update_name(tag, name):

  for namerecord in tag.iter('namerecord'):

    if 'nameID' in namerecord.attrib:

      if namerecord.attrib['nameID'] == '6':

        namerecord.text = name

def ends_in_regular(string):

  """ According to the specification, the font fullname should not end in

      'Regular' for plain fonts. However, some fonts don't obey this rule. We

      keep the style info, to minimize the diff. """

  string = string.strip().split()[-1]

  return string is 'Regular'

def sanitize(string):

  return re.sub(r'[^\w-]+', '', string)

def get_version(string):

  # The string must begin with 'Version n.nn '

    raise InvalidFontException('mal-formed font version')

  return sanitize(string.split()[1])

def sanitize(string):

  return re.sub(r'[^\w-]+', '', string)

if __name__ == '__main__':

  main(sys.argv[1:])

    tree = etree.parse(ttx_path)

    root = tree.getroot()

    name_tag = root.find('name')

    [f_name, f_version] = build_font.get_font_info(name_tag)

    fonts = build_font.get_font_info(name_tag)

    shutil.rmtree(srcdir)

    shutil.rmtree(destdir)

    self.assertEqual(f_name, "Roboto-Regular1200310")

    self.assertEqual(fonts[0].family, "Roboto1200310")

    self.assertEqual(fonts[0].fullname, "Roboto1200310 Regular")