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Edit book/Book polishing: Fix subsetting of fonts whose @font-face rules use the local() or format() CSS functions not working

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This commit is contained in:
Kovid Goyal 2014-12-03 19:09:54 +05:30
parent b8b794175f
commit e4013c9e11
1 changed files with 17 additions and 9 deletions
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26
src/calibre/ebooks/oeb/polish/stats.py
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@ -275,6 +275,8 @@ class StatsCollector(object):
# Weed out invalid font-face rules
rules = []
import tinycss
parser = tinycss.make_full_parser()
for rule in font_face_rules:
ff = rule.get('font-family', None)
if not ff:
@ -288,16 +290,22 @@ class StatsCollector(object):
src = rule.get('src', None)
if not src:
continue
if src.startswith('url(') and src.endswith(')') and src[4] not in {'"', "'"}:
# Quote the url otherwise cssutils fails to parse it if it has
# ' or " in it
src = "url('" + src[4:-1].replace("'", "\\'") + "')"
style = self.parser.parseStyle('background-image:%s'%src, validate=False)
src = style.getProperty('background-image').propertyValue[0].uri
name = self.href_to_name(src, '@font-face rule')
if name is None:
try:
tokens = parser.parse_stylesheet('@font-face { src: %s }' % src).rules[0].declarations[0].value
except Exception:
self.log.warn('Failed to parse @font-family src: %s' % src)
continue
for token in tokens:
if token.type == 'URI':
uv = token.value
if uv:
sn = self.href_to_name(uv, '@font-face rule')
if sn is not None:
rule['src'] = sn
break
else:
self.log.warn('The @font-face rule refers to a font file that does not exist in the book: %s' % src)
continue
rule['src'] = name
normalize_font_properties(rule)
rule['width'] = widths[rule['font-stretch']]
rule['weight'] = int(rule['font-weight'])