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#!/usr/bin/python
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# coding=UTF-8
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#
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# Copyright 2014 Google Inc. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Create a curated subset of NotoSansSymbols for Android."""
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__author__ = 'roozbeh@google.com (Roozbeh Pournader)'
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import contextlib
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import os
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import sys
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import tempfile
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from fontTools import ttLib
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from pathlib import PurePosixPath
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from nototools import subset
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from nototools import unicode_data
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# Unicode blocks that we want to include in the font
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BLOCKS_TO_INCLUDE = """
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20D0..20FF; Combining Diacritical Marks for Symbols
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2100..214F; Letterlike Symbols
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2190..21FF; Arrows
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2200..22FF; Mathematical Operators
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2300..23FF; Miscellaneous Technical
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2400..243F; Control Pictures
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2440..245F; Optical Character Recognition
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2460..24FF; Enclosed Alphanumerics
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2500..257F; Box Drawing
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2580..259F; Block Elements
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25A0..25FF; Geometric Shapes
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2600..26FF; Miscellaneous Symbols
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2700..27BF; Dingbats
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27C0..27EF; Miscellaneous Mathematical Symbols-A
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27F0..27FF; Supplemental Arrows-A
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2800..28FF; Braille Patterns
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2900..297F; Supplemental Arrows-B
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2980..29FF; Miscellaneous Mathematical Symbols-B
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2A00..2AFF; Supplemental Mathematical Operators
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2B00..2BFF; Miscellaneous Symbols and Arrows
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4DC0..4DFF; Yijing Hexagram Symbols
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10140..1018F; Ancient Greek Numbers
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10190..101CF; Ancient Symbols
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101D0..101FF; Phaistos Disc
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1D000..1D0FF; Byzantine Musical Symbols
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1D100..1D1FF; Musical Symbols
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1D200..1D24F; Ancient Greek Musical Notation
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1D300..1D35F; Tai Xuan Jing Symbols
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1D360..1D37F; Counting Rod Numerals
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1D400..1D7FF; Mathematical Alphanumeric Symbols
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1F000..1F02F; Mahjong Tiles
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1F030..1F09F; Domino Tiles
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1F0A0..1F0FF; Playing Cards
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1F700..1F77F; Alchemical Symbols
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"""
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# One-off characters to be included. At the moment, this is the Bitcoin sign
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# (since it's not supported in Roboto yet, and the Japanese TV symbols of
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# Unicode 9.
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ONE_OFF_ADDITIONS = {
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0x20BF, # ₿ BITCOIN SIGN
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0x1F19B, # 🆛 SQUARED THREE D
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0x1F19C, # 🆜 SQUARED SECOND SCREEN
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0x1F19D, # 🆝 SQUARED TWO K;So;0;L;;;;;N;;;;;
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0x1F19E, # 🆞 SQUARED FOUR K;So;0;L;;;;;N;;;;;
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0x1F19F, # 🆟 SQUARED EIGHT K;So;0;L;;;;;N;;;;;
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0x1F1A0, # 🆠 SQUARED FIVE POINT ONE;So;0;L;;;;;N;;;;;
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0x1F1A1, # 🆡 SQUARED SEVEN POINT ONE;So;0;L;;;;;N;;;;;
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0x1F1A2, # 🆢 SQUARED TWENTY-TWO POINT TWO;So;0;L;;;;;N;;;;;
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0x1F1A3, # 🆣 SQUARED SIXTY P;So;0;L;;;;;N;;;;;
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0x1F1A4, # 🆤 SQUARED ONE HUNDRED TWENTY P;So;0;L;;;;;N;;;;;
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0x1F1A5, # 🆥 SQUARED LATIN SMALL LETTER D;So;0;L;;;;;N;;;;;
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0x1F1A6, # 🆦 SQUARED HC;So;0;L;;;;;N;;;;;
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0x1F1A7, # 🆧 SQUARED HDR;So;0;L;;;;;N;;;;;
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0x1F1A8, # 🆨 SQUARED HI-RES;So;0;L;;;;;N;;;;;
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0x1F1A9, # 🆩 SQUARED LOSSLESS;So;0;L;;;;;N;;;;;
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0x1F1AA, # 🆪 SQUARED SHV;So;0;L;;;;;N;;;;;
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0x1F1AB, # 🆫 SQUARED UHD;So;0;L;;;;;N;;;;;
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0x1F1AC, # 🆬 SQUARED VOD;So;0;L;;;;;N;;;;;
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0x1F23B, # 🈻 SQUARED CJK UNIFIED IDEOGRAPH-914D
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}
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# letter-based characters, provided by Roboto
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LETTERLIKE_CHARS_IN_ROBOTO = {
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0x2100, # ℀ ACCOUNT OF
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0x2101, # ℁ ADDRESSED TO THE SUBJECT
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0x2103, # ℃ DEGREE CELSIUS
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0x2105, # ℅ CARE OF
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0x2106, # ℆ CADA UNA
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0x2109, # ℉ DEGREE FAHRENHEIT
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0x2113, # ℓ SCRIPT SMALL L
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0x2116, # № NUMERO SIGN
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0x2117, # ℗ SOUND RECORDING COPYRIGHT
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0x211E, # ℞ PRESCRIPTION TAKE
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0x211F, # ℟ RESPONSE
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0x2120, # ℠ SERVICE MARK
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0x2121, # ℡ TELEPHONE SIGN
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0x2122, # ™ TRADE MARK SIGN
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0x2123, # ℣ VERSICLE
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0x2125, # ℥ OUNCE SIGN
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0x2126, # Ω OHM SIGN
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0x212A, # K KELVIN SIGN
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0x212B, # Å ANGSTROM SIGN
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0x212E, # ℮ ESTIMATED SYMBOL
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0x2132, # Ⅎ TURNED CAPITAL F
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0x213B, # ℻ FACSIMILE SIGN
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0x214D, # ⅍ AKTIESELSKAB
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0x214F, # ⅏ SYMBOL FOR SAMARITAN SOURCE
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}
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DEFAULT_EMOJI = unicode_data.get_presentation_default_emoji()
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EMOJI_ADDITIONS_FILE = os.path.join(
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os.path.dirname(__file__), os.path.pardir, os.path.pardir,
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'unicode', 'additions', 'emoji-data.txt')
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# Characters we have decided we are doing as emoji-style in Android,
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# despite UTR#51's recommendation
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def get_android_emoji():
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"""Return additional Android default emojis."""
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android_emoji = set()
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with open(EMOJI_ADDITIONS_FILE) as emoji_additions:
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data = unicode_data._parse_semicolon_separated_data(
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emoji_additions.read())
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for codepoint, prop in data:
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if prop == 'Emoji_Presentation':
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android_emoji.add(int(codepoint, 16))
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return android_emoji
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def rename_postscript_name(source_font, target_font, new_name):
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"""Rename the post script name to given one"""
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with contextlib.closing(ttLib.TTFont(source_font)) as ttf:
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nameTable = ttf['name']
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for name in nameTable.names:
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if (name.nameID == 6 and name.platformID == 3 and name.platEncID == 1
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and name.langID == 0x0409):
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name.string = new_name
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ttf.save(target_font)
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def main(argv):
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"""Subset the Noto Symbols font.
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The first argument is the source file name, and the second argument is
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the target file name.
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"""
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target_coverage = set()
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# Add all characters in BLOCKS_TO_INCLUDE
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for first, last, _ in unicode_data._parse_code_ranges(BLOCKS_TO_INCLUDE):
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target_coverage.update(range(first, last+1))
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# Add one-off characters
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target_coverage |= ONE_OFF_ADDITIONS
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# Remove characters preferably coming from Roboto
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target_coverage -= LETTERLIKE_CHARS_IN_ROBOTO
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# Remove characters that are supposed to default to emoji
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android_emoji = get_android_emoji()
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target_coverage -= DEFAULT_EMOJI | android_emoji
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# Remove dentistry symbols, as their main use appears to be for CJK:
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# http://www.unicode.org/L2/L2000/00098-n2195.pdf
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target_coverage -= set(range(0x23BE, 0x23CC+1))
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# Remove COMBINING ENCLOSING KEYCAP. It's needed for Android's color emoji
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# mechanism to work properly.
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target_coverage.remove(0x20E3)
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source_file_name = argv[1]
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target_file_name = argv[2]
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tmp = tempfile.NamedTemporaryFile()
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subset.subset_font(
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source_file_name,
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tmp.name,
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include=target_coverage)
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# Use given file name as the PostScript name.
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postScriptName = PurePosixPath(target_file_name).stem
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rename_postscript_name(tmp.name, target_file_name, postScriptName)
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second_subset_coverage = DEFAULT_EMOJI | android_emoji
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second_subset_file_name = argv[3]
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subset.subset_font(
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source_file_name,
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tmp.name,
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include=second_subset_coverage)
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# Use given file name as the PostScript name.
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postScriptName = PurePosixPath(second_subset_file_name).stem
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rename_postscript_name(tmp.name, second_subset_file_name, postScriptName)
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if __name__ == '__main__':
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main(sys.argv)
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