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Fixed unwrapping for various hyphen and dash types, other minor tweaks to pdf

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This commit is contained in:
ldolse 2010-09-11 15:33:10 +10:00
parent 2a906184ad
commit 480eccb0b0
1 changed files with 19 additions and 9 deletions
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24
src/calibre/ebooks/conversion/preprocess.py
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@ -77,7 +77,6 @@ def line_length(format, raw, percent):
elif format == 'pdf':
linere = re.compile('(?<=<br>).*?(?=<br>)', re.DOTALL)
lines = linere.findall(raw)
print "percent is " + str(percent)
lengths = []
for line in lines:
@ -230,13 +229,16 @@ class HTMLPreProcessor(object):
# (re.compile(r'<br>\s*<br>', re.IGNORECASE), lambda match: '\n<p>'),
# unwrap hyphenation - don't delete the hyphen (often doesn't split words)
(re.compile(u'(?<=[-–—])\s*<br>\s*(?=[[a-z\d])'), lambda match: ''),
#(re.compile(u'(?<=[-–—])\s*<br>\s*(?=[[a-z\d])'), lambda match: ''),
# unwrap/delete soft hyphens
#(re.compile(u'[­]\s*<br>\s*(?=[[a-z\d])'), lambda match: ''),
# Remove gray background
(re.compile(r'<BODY[^<>]+>'), lambda match : '<BODY>'),
# Detect Chapters to match default XPATH in GUI
(re.compile(r'(?=<(/?br|p))(<(/?br|p)[^>]*)?>\s*(?P<chap>(<(i|b)>(<(i|b)>)?)?.?(Introduction|Chapter|Epilogue|Prologue|Book|Part|Dedication|Volume|Preface|Acknowledgments)\s*([\d\w-]+\s*){0,3}\s*(</(i|b)>(</(i|b)>)?)?)\s*(</?(br|p)[^>]*>\s*){1,3}\s*(?P<title>(<(i|b)>)?(\s*\w+){1,4}\s*(</(i|b)>)?\s*(</?(br|p)[^>]*>))?', re.IGNORECASE), chap_head),
(re.compile(r'<br\s*/?>\s*(?P<chap>([A-Z]\s+){4,}\s*([\d\w-]+\s*){0,3}\s*)\s*(<br>\s*){1,3}\s*(?P<title>(<(i|b)>)?(\s*\w+){1,4}\s*(</(i|b)>)?\s*(</?(br|p)[^>]*>))?'), chap_head),
# Have paragraphs show better
(re.compile(r'<br.*?>'), lambda match : '<p>'),
@ -323,20 +325,28 @@ class HTMLPreProcessor(object):
print 'Failed to parse remove_footer regexp'
traceback.print_exc()
# unwrap hyphenation - moved here so it's executed after header/footer removal
if is_pdftohtml:
# unwrap visible dashes and hyphens - don't delete as 50% or more of the time these
# hyphens are for compound words, formatting, etc
end_rules.append((re.compile(u'(?<=[-–—])\s*<p>\s*(?=[[a-z\d])'), lambda match: ''))
# unwrap/delete soft hyphens
end_rules.append((re.compile(u'[­](\s*<p>)+\s*(?=[[a-z\d])'), lambda match: ''))
# unwrap/delete soft hyphens with formatting
end_rules.append((re.compile(u'[­]\s*(</(i|u|b)>)+(\s*<p>)+\s*(<(i|u|b)>)+\s*(?=[[a-z\d])'), lambda match: ''))
# Make the more aggressive chapter marking regex optional with the preprocess option to reduce false positives
if getattr(self.extra_opts, 'preprocess_html', None):
if is_pdftohtml:
end_rules.append(
(re.compile(r'(?=<(/?br|p|hr))(<(/?br|p|hr)[^>]*)?>\s*(<(i|b)>(<(i|b)>)?)?\s*(?P<chap>([A-Z-\'"!]{3,})\s*(\d+|[A-Z]+(\s*[A-Z]+)?)?|\d+\.?\s*([\d\w-]+\s*){0,4}\s*)\s*(</(i|b)>(</(i|b)>)?)?\s*(</?p[^>]*>|<br[^>]*>)\n?((?=(<i>)?\s*\w+(\s+\w+)?(</i>)?(<br[^>]*>|</?p[^>]*>))((?P<title>.*)(<br[^>]*>|</?p[^>]*>)))?'), chap_head),
)
end_rules.append((re.compile(r'(?=<(/?br|p|hr))(<(/?br|p|hr)[^>]*)?>\s*(<(i|b)>(<(i|b)>)?)?\s*(?P<chap>([A-Z-\'"!]{3,})\s*(\d+|[A-Z]+(\s*[A-Z]+)?)?|\d+\.?\s*([\d\w-]+\s*){0,4}\s*)\s*(</(i|b)>(</(i|b)>)?)?\s*(</?p[^>]*>|<br[^>]*>)\n?((?=(<i>)?\s*\w+(\s+\w+)?(</i>)?(<br[^>]*>|</?p[^>]*>))((?P<title>.*)(<br[^>]*>|</?p[^>]*>)))?'), chap_head))
if getattr(self.extra_opts, 'unwrap_factor', 0.0) > 0.01:
length = line_length('pdf', html, getattr(self.extra_opts, 'unwrap_factor'))
if length:
print "The pdf line length returned is " + str(length)
# print "The pdf line length returned is " + str(length)
end_rules.append(
# Un wrap using punctuation
(re.compile(r'(?<=.{%i}[a-z,;:)\-IA])\s*(?P<ital></(i|b|u)>)?\s*(<p.*?>)\s*(?=(<(i|b|u)>)?\s*[\w\d(])' % length, re.UNICODE), wrap_lines),
(re.compile(r'(?<=.{%i}[a-z,;:)\-IA])\s*(?P<ital></(i|b|u)>)?\s*(<p.*?>\s*)+\s*(?=(<(i|b|u)>)?\s*[\w\d(])' % length, re.UNICODE), wrap_lines),
)
for rule in self.PREPROCESS + start_rules: