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New pdftohtml processing rules. Best yet.

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This commit is contained in:
John Schember 2009-04-25 08:14:22 -04:00
parent 0861a58127
commit 188f630c35
1 changed files with 15 additions and 18 deletions
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33
src/calibre/ebooks/conversion/preprocess.py
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@ -31,6 +31,12 @@ def chap_head(match):
else:
return '<h1>'+chap+'<br/>'+title+'</h1><br/>'
def wrap_lines(match):
ital = match.group('ital')
if not ital:
return ' '
else:
return ital+' '
def line_length(raw, percent):
'''
@ -93,17 +99,11 @@ class HTMLPreProcessor(object):
(re.compile(r'<a name=\d+></a>', re.IGNORECASE), lambda match: ''),
# Remove <hr> tags
(re.compile(r'<hr.*?>', re.IGNORECASE), lambda match: '<br />'),
# Remove page numbers
(re.compile(r'\d+<br>', re.IGNORECASE), lambda match: ''),
# Replace <br><br> with <p>
(re.compile(r'<br.*?>\s*<br.*?>', re.IGNORECASE), lambda match: '<p>'),
# Remove <br>
(re.compile(r'(.*)<br.*?>', re.IGNORECASE),
lambda match: match.group() if \
re.match('<', match.group(1).lstrip()) or \
len(match.group(1)) < 40 else match.group(1)),
# Remove hyphenation
(re.compile(r'-\n\r?'), lambda match: ''),
(re.compile(r'-<br.*?>\n\r?'), lambda match: ''),
# Remove gray background
(re.compile(r'<BODY[^<>]+>'), lambda match : '<BODY>'),
@ -112,15 +112,12 @@ class HTMLPreProcessor(object):
(re.compile(ur'\u00a0'), lambda match : ' '),
# Detect Chapters to match default XPATH in GUI
(re.compile(r'(<br[^>]*>)?(</?p[^>]*>)?s*(?P<chap>(Chapter|Epilogue|Prologue|Book|Part)\s*(\d+|\w+)?)(</?p[^>]*>|<br[^>]*>)\n?((?=(<i>)?\s*\w+(\s+\w+)?(</i>)?(<br[^>]*>|</?p[^>]*>))((?P<title>.*)(<br[^>]*>|</?p[^>]*>)))?', re.IGNORECASE), chap_head),
(re.compile(r'(<br[^>]*>)?(</?p[^>]*>)?s*(?P<chap>([A-Z \'"!]{5,})\s*(\d+|\w+)?)(</?p[^>]*>|<br[^>]*>)\n?((?=(<i>)?\s*\w+(\s+\w+)?(</i>)?(<br[^>]*>|</?p[^>]*>))((?P<title>.*)(<br[^>]*>|</?p[^>]*>)))?'), chap_head),
(re.compile(r'(?=<(/?br|p))(<(/?br|p)[^>]*)?>\s*(?P<chap>(<i><b>|<i>|<b>)?(Chapter|Epilogue|Prologue|Book|Part)\s*(\d+|\w+)?(</i></b>|</i>|</b>)?)(</?p[^>]*>|<br[^>]*>)\n?((?=(<i>)?\s*\w+(\s+\w+)?(</i>)?(<br[^>]*>|</?p[^>]*>))((?P<title>(<i>)?\s*\w+(\s+\w+)?(</i>)?)(<br[^>]*>|</?p[^>]*>)))?', re.IGNORECASE), chap_head),
(re.compile(r'(?=<(/?br|p))(<(/?br|p)[^>]*)?>\s*(?P<chap>([A-Z \'"!]{5,})\s*(\d+|\w+)?)(</?p[^>]*>|<br[^>]*>)\n?((?=(<i>)?\s*\w+(\s+\w+)?(</i>)?(<br[^>]*>|</?p[^>]*>))((?P<title>.*)(<br[^>]*>|</?p[^>]*>)))?'), chap_head),
# Have paragraphs show better
(re.compile(r'<br.*?>'), lambda match : '<p>'),
# Un wrap lines
(re.compile(r'(?<=[^\.^\^?^!^"^”])\s*(</(i|b|u)>)*\s*<p.*?>\s*(<(i|b|u)>)*\s*(?=[a-z0-9I])', re.UNICODE), lambda match: ' '),
# Clean up spaces
(re.compile(u'(?<=[\.,:;\?!”"\'])[\s^ ]*(?=<)'), lambda match: ' '),
# Add space before and after italics
@ -162,12 +159,12 @@ class HTMLPreProcessor(object):
elif self.is_book_designer(html):
rules = self.BOOK_DESIGNER
elif self.is_pdftohtml(html):
# Add rules that require matching line length here
#line_length_rules = [
# (re.compile('%i' % line_length(html, .85)), lambda match:)
#]
line_length_rules = [
# Un wrap using punctuation
(re.compile(r'(?<=.{%i}[a-z,;:-IA])\s*(?P<ital></(i|b|u)>)?\s*(<p.*?>)\s*(?=(<(i|b|u)>)?[\w\d])' % line_length(html, .2), re.UNICODE), wrap_lines),
]
rules = self.PDFTOHTML # + line_length_rules
rules = self.PDFTOHTML + line_length_rules
else:
rules = []
for rule in self.PREPROCESS + rules: