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tweaked the auto-detection to handle cases where the vast majority of the lines are formatted as block or print

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ldolse 2011-01-09 18:38:52 +08:00
parent 696d925232
commit 0f109d699f
1 changed files with 13 additions and 7 deletions
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16
src/calibre/ebooks/txt/processor.py
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@ -133,14 +133,20 @@ def detect_paragraph_type(txt):
hardbreaks = docanalysis.line_histogram(.55)
if hardbreaks:
# Check for print
# Determine print percentage
tab_line_count = len(re.findall('(?mu)^(\t|\s{2,}).+$', txt))
if tab_line_count / float(txt_line_count) >= .15:
return 'print'
print_percent = tab_line_count / float(txt_line_count)
# Check for block
# Determine block percentage
empty_line_count = len(re.findall('(?mu)^\s*$', txt))
if empty_line_count / float(txt_line_count) >= .15:
block_percent = empty_line_count / float(txt_line_count)
# Compare the two types - the type with the larger number of instances wins
# in cases where only one or the other represents the vast majority of the document neither wins
if print_percent >= block_percent:
if .15 <= print_percent <= .75:
return 'print'
elif .15 <= block_percent <= .75:
return 'block'
# Assume unformatted text with hardbreaks if nothing else matches