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#!/usr/bin/env python3
'''verify classes defined in xml have correct ordering where needed
Looks for comment lines in the classes.xml file that match the string:
*NEXT n CLASSES MUST MATCH*
where n is the number of upcoming class definitions that must result in the
same glyph alignment when glyph names are sorted by TTF order (as described
in the glyph_data.csv file).
'''
__url__ = 'https://github.com/silnrsi/pysilfont'
__copyright__ = 'Copyright (c) 2019 SIL International (https://www.sil.org)'
__license__ = 'Released under the MIT License (https://opensource.org/licenses/MIT)'
__author__ = 'Bob Hallissy'
import re
import types
from xml.etree import ElementTree as ET
from silfont.core import execute
argspec = [
('classes', {'help': 'class definition in XML format', 'nargs': '?', 'default': 'classes.xml'}, {'type': 'infile'}),
('glyphdata', {'help': 'Glyph info csv file', 'nargs': '?', 'default': 'glyph_data.csv'}, {'type': 'incsv'}),
('--gname', {'help': 'Column header for glyph name', 'default': 'glyph_name'}, {}),
('--sort', {'help': 'Column header(s) for sort order', 'default': 'sort_final'}, {}),
]
# Dictionary of glyphName : sortValue
sorts = dict()
# Keep track of glyphs mentioned in classes but not in glyph_data.csv
missingGlyphs = set()
def doit(args):
logger = args.logger
# Read input csv to get glyph sort order
incsv = args.glyphdata
fl = incsv.firstline
if fl is None: logger.log("Empty input file", "S")
if args.gname in fl:
glyphnpos = fl.index(args.gname)
else:
logger.log("No" + args.gname + "field in csv headers", "S")
if args.sort in fl:
sortpos = fl.index(args.sort)
else:
logger.log('No "' + args.sort + '" heading in csv headers"', "S")
next(incsv.reader, None) # Skip first line with containing headers
for line in incsv:
glyphn = line[glyphnpos]
if len(glyphn) == 0:
continue # No need to include cases where name is blank
sorts[glyphn] = float(line[sortpos])
# RegEx we are looking for in comments
matchCountRE = re.compile("\*NEXT ([1-9]\d*) CLASSES MUST MATCH\*")
# parse classes.xml but include comments
class MyTreeBuilder(ET.TreeBuilder):
def comment(self, data):
res = matchCountRE.search(data)
if res:
# record the count of classes that must match
self.start(ET.Comment, {})
self.data(res.group(1))
self.end(ET.Comment)
doc = ET.parse(args.classes, parser=ET.XMLParser(target=MyTreeBuilder())).getroot()
# process results looking for both class elements and specially formatted comments
matchCount = 0
refClassList = None
refClassName = None
for child in doc:
if isinstance(child.tag, types.FunctionType):
# Special type used for comments
if matchCount > 0:
logger.log("Unexpected match request '{}': matching {} is not yet complete".format(child.text, refClassName), "E")
ref = None
matchCount = int(child.text)
# print "Match count = {}".format(matchCount)
elif child.tag == 'class':
l = orderClass(child, logger) # Do this so we record classes whether we match them or not.
if matchCount > 0:
matchCount -= 1
className = child.attrib['name']
if refClassName is None:
refClassList = l
refLen = len(refClassList)
refClassName = className
else:
# compare ref list and l
if len(l) != refLen:
logger.log("Class {} (length {}) and {} (length {}) have unequal length".format(refClassName, refLen, className, len(l)), "E")
else:
errCount = 0
for i in range(refLen):
if l[i][0] != refClassList[i][0]:
logger.log ("Class {} and {} inconsistent order glyphs {} and {}".format(refClassName, className, refClassList[i][2], l[i][2]), "E")
errCount += 1
if errCount > 5:
logger.log ("Abandoning compare between Classes {} and {}".format(refClassName, className), "E")
break
if matchCount == 0:
refClassName = None
# List glyphs mentioned in classes.xml but not present in glyph_data:
if len(missingGlyphs):
logger.log('Glyphs mentioned in classes.xml but not present in glyph_data: ' + ', '.join(sorted(missingGlyphs)), 'W')
classes = {} # Keep record of all classes we've seen so we can flatten references
def orderClass(classElement, logger):
# returns a list of tuples, each containing (indexWithinClass, sortOrder, glyphName)
# list is sorted by sortOrder
glyphList = classElement.text.split()
res = []
for i in range(len(glyphList)):
token = glyphList[i]
if token.startswith('@'):
# Nested class
cname = token[1:]
if cname in classes:
res.extend(classes[cname])
else:
logger.log("Invalid fea: class {} referenced before being defined".format(cname),"S")
else:
# simple glyph name -- make sure it is in glyph_data:
if token in sorts:
res.append((i, sorts[token], token))
else:
missingGlyphs.add(token)
classes[classElement.attrib['name']] = res
return sorted(res, key=lambda x: x[1])
def cmd() : execute(None,doit,argspec)
if __name__ == "__main__": cmd()
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