Conversion: Fix the word @page in a comment inside a stylesheet with no following {} causing the rest of the stylesheet to be ignored.

src/calibre/ebooks/conversion/preprocess.py

@@ -282,7 +282,6 @@ def __call__(self, html, format, length=1):
 
 class CSSPreProcessor(object):
 
-    PAGE_PAT   = re.compile(r'@page[^{]*?{[^}]*?}')
     # Remove some of the broken CSS Microsoft products
     # create
     MS_PAT     = re.compile(r'''
@@ -304,7 +303,6 @@ def ms_sub(self, match):
 
     def __call__(self, data, add_namespace=False):
         from calibre.ebooks.oeb.base import XHTML_CSS_NAMESPACE
-        data = self.PAGE_PAT.sub('', data)
         data = self.MS_PAT.sub(self.ms_sub, data)
         if not add_namespace:
             return data

src/calibre/ebooks/oeb/base.py

@@ -913,6 +913,7 @@ def _parse_txt(self, data):
 
         def _parse_css(self, data):
             from cssutils import CSSParser, log, resolveImports
+            from cssutils.css import CSSRule
             log.setLevel(logging.WARN)
             log.raiseExceptions = False
             self.oeb.log.debug('Parsing', self.href, '...')
@@ -924,6 +925,8 @@ def _parse_css(self, data):
             data = parser.parseString(data, href=self.href, validate=False)
             data = resolveImports(data)
             data.namespaces['h'] = XHTML_NS
+            for rule in tuple(data.cssRules.rulesOfType(CSSRule.PAGE_RULE)):
+                data.cssRules.remove(rule)
             return data
 
         def _fetch_css(self, path):

src/calibre/ebooks/oeb/stylizer.py

@@ -12,7 +12,7 @@
 from weakref import WeakKeyDictionary
 from xml.dom import SyntaxErr as CSSSyntaxError
 from cssutils.css import (CSSStyleRule, CSSPageRule, CSSFontFaceRule,
-        cssproperties)
+        cssproperties, CSSRule)
 from cssutils import (profile as cssprofiles, parseString, parseStyle, log as
         cssutils_log, CSSParser, profiles, replaceUrls)
 from lxml import etree
@@ -216,6 +216,8 @@ def __init__(self, tree, path, oeb, opts, profile=None,
                                 self.logger.warn('CSS @import of non-CSS file %r' % rule.href)
                                 continue
                             stylesheets.append(sitem.data)
+                    for rule in tuple(stylesheet.cssRules.rulesOfType(CSSRule.PAGE_RULE)):
+                        stylesheet.cssRules.remove(rule)
                     # Make links to resources absolute, since these rules will
                     # be folded into a stylesheet at the root
                     replaceUrls(stylesheet, item.abshref,