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process pdf input html output a bit.

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This commit is contained in:
John Schember 2009-04-08 19:51:56 -04:00
parent 3b09d01701
commit 383fe33adb
1 changed files with 33 additions and 2 deletions
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35
src/calibre/ebooks/pdf/pdftohtml.py
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@ -6,7 +6,7 @@ __copyright__ = '2008, Kovid Goyal <kovid at kovidgoyal.net>, ' \
'2009, John Schember <john@nachtimwald.com>'
__docformat__ = 'restructuredtext en'
import errno, os, sys, subprocess
import errno, os, re, sys, subprocess
from functools import partial
from calibre.ebooks import ConversionError, DRMError
@ -24,6 +24,32 @@ if iswindows and hasattr(sys, 'frozen'):
if islinux and getattr(sys, 'frozen_path', False):
PDFTOHTML = os.path.join(getattr(sys, 'frozen_path'), 'pdftohtml')
# Fix pdftohtml markup
PDFTOHTML_RULES = [
# Remove <hr> tags
(re.compile(r'<hr.*?>', re.IGNORECASE), lambda match: '<br />'),
# Remove page numbers
(re.compile(r'\d+<br>', re.IGNORECASE), lambda match: ''),
# Remove <br> and replace <br><br> with <p>
(re.compile(r'<br.*?>\s*<br.*?>', re.IGNORECASE), lambda match: '<p>'),
(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: ''),
# Remove gray background
(re.compile(r'<BODY[^<>]+>'), lambda match : '<BODY>'),
# Remove non breaking spaces
(re.compile(ur'\u00a0'), lambda match : ' '),
# Add second <br /> after first to allow paragraphs to show better
(re.compile(r'<br.*?>'), lambda match : '<br /><br />'),
]
def pdftohtml(pdf_path):
'''
Convert the pdf into html using the pdftohtml app.
@ -72,4 +98,9 @@ def pdftohtml(pdf_path):
if not '<br' in raw[:4000]:
raise ConversionError(os.path.basename(pdf_path) + _(' is an image based PDF. Only conversion of text based PDFs is supported.'), True)
return '<!-- created by calibre\'s pdftohtml -->\n' + raw
return '<!-- created by calibre\'s pdftohtml -->\n' + processed_html(raw)
def processed_html(html):
for rule in PDFTOHTML_RULES:
html = rule[0].sub(rule[1], html)
return html