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#!/usr/bin/env python
# encoding: utf8
from __future__ import print_function
import os, sys, plistlib, re
from collections import OrderedDict
from ConfigParser import RawConfigParser
from argparse import ArgumentParser
from fontTools import ttLib
from robofab.objects.objectsRF import OpenFont
# Regex matching "default" glyph names, like "uni2043" and "u01C5"
uniNameRe = re.compile(r'^u(?:ni)([0-9A-F]{4,8})$')
def unicodeForDefaultGlyphName(glyphName):
m = uniNameRe.match(glyphName)
if m is not None:
try:
return int(m.group(1), 16)
except:
pass
return None
def canonicalGlyphName(glyphName, uc2names):
uc = unicodeForDefaultGlyphName(glyphName)
if uc is not None:
names = uc2names.get(uc)
if names is not None and len(names) > 0:
return names[0]
return glyphName
def parseGlyphComposition(composite):
c = composite.split("=")
d = c[1].split("/")
glyphName = d[0]
if len(d) == 1:
offset = [0, 0]
else:
offset = [int(i) for i in d[1].split(",")]
accentString = c[0]
accents = accentString.split("+")
baseName = accents.pop(0)
accentNames = [i.split(":") for i in accents]
return (glyphName, baseName, accentNames, offset)
def loadGlyphCompositions(filename): # { glyphName => (baseName, accentNames, offset) }
compositions = OrderedDict()
with open(filename, 'r') as f:
for line in f:
line = line.strip()
if len(line) > 0 and line[0] != '#':
glyphName, baseName, accentNames, offset = parseGlyphComposition(line)
compositions[glyphName] = (baseName, accentNames, offset)
return compositions
def loadAGL(filename): # -> { 2126: 'Omega', ... }
m = {}
with open(filename, 'r') as f:
for line in f:
# Omega;2126
# dalethatafpatah;05D3 05B2 # higher-level combinations; ignored
line = line.strip()
if len(line) > 0 and line[0] != '#':
name, uc = tuple([c.strip() for c in line.split(';')])
if uc.find(' ') == -1:
# it's a 1:1 mapping
m[int(uc, 16)] = name
return m
def loadLocalNamesDB(fonts, agl, diacriticComps):
uc2names = None # { 2126: ['Omega', ...], ...}
allNames = set() # set('Omega', ...)
for font in fonts:
_uc2names = font.getCharacterMapping() # { 2126: ['Omega', ...], ...}
if uc2names is None:
uc2names = _uc2names
else:
for uc, _names in _uc2names.iteritems():
names = uc2names.setdefault(uc, [])
for name in _names:
if name not in names:
names.append(name)
for g in font:
allNames.add(g.name)
# agl { 2126: 'Omega', ...} -> { 'Omega': [2126, ...], ...}
aglName2Ucs = {}
for uc, name in agl.iteritems():
aglName2Ucs.setdefault(name, []).append(uc)
for glyphName, comp in diacriticComps.iteritems():
aglUCs = aglName2Ucs.get(glyphName)
if aglUCs is None:
uc = unicodeForDefaultGlyphName(glyphName)
if uc is not None:
glyphName2 = agl.get(uc)
if glyphName2 is not None:
glyphName = glyphName2
names = uc2names.setdefault(uc, [])
if glyphName not in names:
names.append(glyphName)
allNames.add(glyphName)
else:
allNames.add(glyphName)
for uc in aglUCs:
names = uc2names.get(uc, [])
if glyphName not in names:
names.append(glyphName)
uc2names[uc] = names
name2ucs = {} # { 'Omega': [2126, ...], ...}
for uc, names in uc2names.iteritems():
for name in names:
name2ucs.setdefault(name, set()).add(uc)
return uc2names, name2ucs, allNames
# def getNameToGroupsMap(groups): # => { glyphName => set(groupName) }
# nameMap = {}
# for groupName, glyphNames in groups.iteritems():
# for glyphName in glyphNames:
# nameMap.setdefault(glyphName, set()).add(groupName)
# return nameMap
# def inspectKerning(kerning):
# leftIndex = {} # { glyph-name => <ref to plist right-hand side dict> }
# rightIndex = {} # { glyph-name => [(left-hand-side-name, kernVal), ...] }
# rightGroupIndex = {} # { group-name => [(left-hand-side-name, kernVal), ...] }
# for leftName, right in kerning.iteritems():
# if leftName[0] != '@':
# leftIndex[leftName] = right
# for rightName, kernVal in right.iteritems():
# if rightName[0] != '@':
# rightIndex.setdefault(rightName, []).append((leftName, kernVal))
# else:
# rightGroupIndex.setdefault(rightName, []).append((leftName, kernVal))
# return leftIndex, rightIndex, rightGroupIndex
class RefTracker:
def __init__(self):
self.refs = {}
def incr(self, name):
self.refs[name] = self.refs.get(name, 0) + 1
def decr(self, name): # => bool hasNoRefs
r = self.refs.get(name)
if r is None:
raise Exception('decr untracked ref ' + repr(name))
if r < 1:
raise Exception('decr already zero ref ' + repr(name))
if r == 1:
del self.refs[name]
return True
self.refs[name] = r - 1
def __contains__(self, name):
return name in self.refs
def main(argv=sys.argv):
argparser = ArgumentParser(description='Remove unused kerning')
argparser.add_argument(
'-dry', dest='dryRun', action='store_const', const=True, default=False,
help='Do not modify anything, but instead just print what would happen.')
argparser.add_argument(
'fontPaths', metavar='<ufofile>', type=str, nargs='+', help='UFO fonts to update')
args = argparser.parse_args(argv)
dryRun = args.dryRun
agl = loadAGL('src/glyphlist.txt') # { 2126: 'Omega', ... }
diacriticComps = loadGlyphCompositions('src/diacritics.txt') # {glyphName => (baseName, a, o)}
for fontPath in args.fontPaths:
print(fontPath)
groupsFilename = os.path.join(fontPath, 'groups.plist')
kerningFilename = os.path.join(fontPath, 'kerning.plist')
groups = plistlib.readPlist(groupsFilename) # { groupName => [glyphName] }
kerning = plistlib.readPlist(kerningFilename) # { leftName => {rightName => kernVal} }
font = OpenFont(fontPath)
uc2names, name2ucs, allNames = loadLocalNamesDB([font], agl, diacriticComps)
# start with eliminating non-existent glyphs from groups and completely
# eliminate groups with all-dead glyphs.
eliminatedGroups = set()
for groupName, glyphNames in list(groups.items()):
glyphNames2 = []
for name in glyphNames:
if name in allNames:
glyphNames2.append(name)
else:
name2 = canonicalGlyphName(name, uc2names)
if name2 != name and name2 in allNames:
print('group: rename glyph', name, '->', name2)
glyphNames2.append(name2)
if len(glyphNames2) == 0:
print('group: eliminate', groupName)
eliminatedGroups.add(groupName)
del groups[groupName]
elif len(glyphNames2) != len(glyphNames):
print('group: shrink', groupName)
groups[groupName] = glyphNames2
# now eliminate kerning
groupRefs = RefTracker() # tracks group references, so we can eliminate unreachable ones
for leftName, right in list(kerning.items()):
leftIsGroup = leftName[0] == '@'
if leftIsGroup:
if leftName in eliminatedGroups:
print('kerning: eliminate LHS', leftName)
del kerning[leftName]
continue
groupRefs.incr(leftName)
else:
if leftName not in allNames:
print('kerning: eliminate LHS', leftName)
del kerning[leftName]
continue
right2 = {}
for rightName, kernVal in right.iteritems():
rightIsGroup = rightName[0] == '@'
if rightIsGroup:
if rightIsGroup in eliminatedGroups:
print('kerning: eliminate RHS group', rightName)
else:
groupRefs.incr(rightName)
right2[rightName] = kernVal
else:
if rightName not in allNames:
# maybe an unnamed glyph?
rightName2 = canonicalGlyphName(rightName, uc2names)
if rightName2 != rightName:
print('kerning: rename & update RHS glyph', rightName, '->', rightName2)
right2[rightName2] = kernVal
else:
print('kerning: eliminate RHS glyph', rightName)
else:
right2[rightName] = kernVal
if len(right2) == 0:
print('kerning: eliminate LHS', leftName)
del kerning[leftName]
if leftIsGroup:
groupRefs.decr(leftName)
else:
kerning[leftName] = right2
# eliminate any unreferenced groups
for groupName, glyphNames in list(groups.items()):
if not groupName in groupRefs:
print('group: eliminate unreferenced group', groupName)
del groups[groupName]
# verify that there are no conflicting kerning pairs
pairs = {} # { key => [...] }
conflictingPairs = set()
for leftName, right in kerning.iteritems():
# expand LHS group -> names
topLeftName = leftName
for leftName in groups[leftName] if leftName[0] == '@' else [leftName]:
if leftName not in allNames:
raise Exception('unknown LHS glyph name ' + repr(leftName))
keyPrefix = leftName + '+'
for rightName, kernVal in right.iteritems():
# expand RHS group -> names
topRightName = rightName
for rightName in groups[rightName] if rightName[0] == '@' else [rightName]:
if rightName not in allNames:
raise Exception('unknown RHS glyph name ' + repr(rightName))
# print(leftName, '+', rightName, '=>', kernVal)
key = keyPrefix + rightName
isConflict = key in pairs
pairs.setdefault(key, []).append(( topLeftName, topRightName, kernVal ))
if isConflict:
conflictingPairs.add(key)
# # resolve pair conflicts by preferring pairs defined via group kerning
# for key in conflictingPairs:
# pairs = pairs[key]
# print('kerning: conflicting pairs %r: %r' % (key, pairs))
# bestPair = None
# redundantPairs = []
# for pair in pairs:
# leftName, rightName, kernVal = pair
# if bestPair is None:
# bestPair = pair
# else:
# bestLeftName, bestRightName, _ = bestPair
# bestScore = 0
# score = 0
# if bestLeftName[0] == '@': bestScore += 1
# if bestRightName[0] == '@': bestScore += 1
# if leftName[0] == '@': score += 1
# if rightName[0] == '@': score += 1
# if bestScore == 2:
# # doesn't get better than this
# break
# elif score > bestScore:
# redundantPairs.append(bestPair)
# bestPair = pair
# else:
# redundantPairs.append(pair)
# print('- keeping', bestPair)
# print('- eliminating', redundantPairs)
# for redundantPairs
# # eliminate any unreferenced groups
# for groupName, glyphNames in list(groups.items()):
# if not groupName in groupRefs:
# print('group: eliminate unreferenced group', groupName)
# del groups[groupName]
print('Write', groupsFilename)
if not dryRun:
plistlib.writePlist(groups, groupsFilename)
print('Write', kerningFilename)
if not dryRun:
plistlib.writePlist(kerning, kerningFilename)
# [end] for fontPath in args.fontPaths
if __name__ == '__main__':
main()
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