mirror of https://github.com/python/cpython
116 lines
4.3 KiB
Python
Executable File
116 lines
4.3 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
"""
|
|
Utility for parsing HTML5 entity definitions available from:
|
|
|
|
https://html.spec.whatwg.org/entities.json
|
|
https://html.spec.whatwg.org/multipage/named-characters.html
|
|
|
|
The page now contains the following note:
|
|
|
|
"This list is static and will not be expanded or changed in the future."
|
|
|
|
Written by Ezio Melotti and Iuliia Proskurnia.
|
|
"""
|
|
|
|
import os
|
|
import sys
|
|
import json
|
|
from urllib.request import urlopen
|
|
from html.entities import html5
|
|
|
|
SCRIPT_NAME = 'Tools/build/parse_html5_entities.py'
|
|
PAGE_URL = 'https://html.spec.whatwg.org/multipage/named-characters.html'
|
|
ENTITIES_URL = 'https://html.spec.whatwg.org/entities.json'
|
|
HTML5_SECTION_START = '# HTML5 named character references'
|
|
|
|
def get_json(url):
|
|
"""Download the json file from the url and returns a decoded object."""
|
|
with urlopen(url) as f:
|
|
data = f.read().decode('utf-8')
|
|
return json.loads(data)
|
|
|
|
def create_dict(entities):
|
|
"""Create the html5 dict from the decoded json object."""
|
|
new_html5 = {}
|
|
for name, value in entities.items():
|
|
new_html5[name.lstrip('&')] = value['characters']
|
|
return new_html5
|
|
|
|
def compare_dicts(old, new):
|
|
"""Compare the old and new dicts and print the differences."""
|
|
added = new.keys() - old.keys()
|
|
if added:
|
|
print('{} entitie(s) have been added:'.format(len(added)))
|
|
for name in sorted(added):
|
|
print(' {!r}: {!r}'.format(name, new[name]))
|
|
removed = old.keys() - new.keys()
|
|
if removed:
|
|
print('{} entitie(s) have been removed:'.format(len(removed)))
|
|
for name in sorted(removed):
|
|
print(' {!r}: {!r}'.format(name, old[name]))
|
|
changed = set()
|
|
for name in (old.keys() & new.keys()):
|
|
if old[name] != new[name]:
|
|
changed.add((name, old[name], new[name]))
|
|
if changed:
|
|
print('{} entitie(s) have been modified:'.format(len(changed)))
|
|
for item in sorted(changed):
|
|
print(' {!r}: {!r} -> {!r}'.format(*item))
|
|
|
|
def write_items(entities, file=sys.stdout):
|
|
"""Write the items of the dictionary in the specified file."""
|
|
# The keys in the generated dictionary should be sorted
|
|
# in a case-insensitive way, however, when two keys are equal,
|
|
# the uppercase version should come first so that the result
|
|
# looks like: ['Aacute', 'aacute', 'Aacute;', 'aacute;', ...]
|
|
# To do this we first sort in a case-sensitive way (so all the
|
|
# uppercase chars come first) and then sort with key=str.lower.
|
|
# Since the sorting is stable the uppercase keys will eventually
|
|
# be before their equivalent lowercase version.
|
|
keys = sorted(entities.keys())
|
|
keys = sorted(keys, key=str.lower)
|
|
print(HTML5_SECTION_START, file=file)
|
|
print(f'# Generated by {SCRIPT_NAME}\n'
|
|
f'# from {ENTITIES_URL} and\n'
|
|
f'# {PAGE_URL}.\n'
|
|
f'# Map HTML5 named character references to the '
|
|
f'equivalent Unicode character(s).', file=file)
|
|
print('html5 = {', file=file)
|
|
for name in keys:
|
|
print(f' {name!r}: {entities[name]!a},', file=file)
|
|
print('}', file=file)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
# without args print a diff between html.entities.html5 and new_html5
|
|
# with --create print the new html5 dict
|
|
# with --patch patch the Lib/html/entities.py file
|
|
new_html5 = create_dict(get_json(ENTITIES_URL))
|
|
if '--create' in sys.argv:
|
|
write_items(new_html5)
|
|
elif '--patch' in sys.argv:
|
|
fname = 'Lib/html/entities.py'
|
|
temp_fname = fname + '.temp'
|
|
with open(fname) as f1, open(temp_fname, 'w') as f2:
|
|
skip = False
|
|
for line in f1:
|
|
if line.startswith(HTML5_SECTION_START):
|
|
write_items(new_html5, file=f2)
|
|
skip = True
|
|
continue
|
|
if skip:
|
|
# skip the old items until the }
|
|
if line.startswith('}'):
|
|
skip = False
|
|
continue
|
|
f2.write(line)
|
|
os.remove(fname)
|
|
os.rename(temp_fname, fname)
|
|
else:
|
|
if html5 == new_html5:
|
|
print('The current dictionary is updated.')
|
|
else:
|
|
compare_dicts(html5, new_html5)
|
|
print('Run "./python {0} --patch" to update Lib/html/entities.html '
|
|
'or "./python {0} --create" to see the generated ' 'dictionary.'.format(__file__))
|