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Fix #5904 (Splitting problem with text entries)

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This commit is contained in:
Kovid Goyal 2010-07-02 13:53:06 -06:00
commit f3c723077a
2 changed files with 21 additions and 7 deletions
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3
src/calibre/ebooks/txt/input.py
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@ -63,7 +63,8 @@ class TXTInput(InputFormatPlugin):
raise ValueError('This txt file has malformed markup, it cannot be'
' converted by calibre. See http://daringfireball.net/projects/markdown/syntax')
else:
html = convert_basic(txt)
flow_size = getattr(options, 'flow_size', 0)
html = convert_basic(txt, epub_split_size_kb=flow_size)
from calibre.customize.ui import plugin_for_input_format
html_input = plugin_for_input_format('html')

23
src/calibre/ebooks/txt/processor.py
View File

@ -17,13 +17,10 @@ __docformat__ = 'restructuredtext en'
HTML_TEMPLATE = u'<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"/><title>%s</title></head><body>\n%s\n</body></html>'
def convert_basic(txt, title=''):
lines = []
def convert_basic(txt, title='', epub_split_size_kb=0):
# Strip whitespace from the beginning and end of the line. Also replace
# all line breaks with \n.
for line in txt.splitlines():
lines.append(line.strip())
txt = '\n'.join(lines)
txt = '\n'.join([line.strip() for line in txt.splitlines()])
# Condense redundant spaces
txt = re.sub('[ ]{2,}', ' ', txt)
@ -34,6 +31,15 @@ def convert_basic(txt, title=''):
# Remove excessive line breaks.
txt = re.sub('\n{3,}', '\n\n', txt)
#Takes care if there is no point to split
if epub_split_size_kb > 0:
length_byte = len(txt.encode('utf-8'))
#Calculating the average chunk value for easy splitting as EPUB (+2 as a safe margin)
chunk_size = long(length_byte / (int(length_byte / (epub_split_size_kb * 1024) ) + 2 ))
#if there are chunks with a superior size then go and break
if (len(filter(lambda x: len(x.encode('utf-8')) > chunk_size, txt.split('\n\n')))) :
txt = u'\n\n'.join([split_string_separator(line, chunk_size) for line in txt.split('\n\n')])
lines = []
# Split into paragraphs based on having a blank line between text.
for line in txt.split('\n\n'):
@ -71,3 +77,10 @@ def opf_writer(path, opf_name, manifest, spine, mi):
with open(os.path.join(path, opf_name), 'wb') as opffile:
opf.render(opffile)
def split_string_separator(txt, size) :
if len(txt.encode('utf-8')) > size:
txt = u''.join([re.sub(u'\.(?P<ends>[^.]*)$', u'.\n\n\g<ends>',
txt[i:i+size], 1) for i in
xrange(0, len(txt.encode('utf-8')), size)])
return txt