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#! /usr/bin/env python
"""Convert a LaTeX .toc file to some PDFTeX magic to create that neat outline.
The output file has an extension of '.bkm' instead of '.out', since hyperref
already uses that extension. Let's avoid clashing.
"""
import os
import re
import string
import sys
# Ench item in an entry is a tuple of:
#
# Section #, Title String, Page #, List of Sub-entries
cline_re = r"""^
\\contentsline\ \{([a-z]*)} # type of section in $1
\{(?:\\numberline\ \{([0-9.A-Z]+)})? # section number
(.*)} # title string
\{(\d+)}$""" # page number
cline_rx = re.compile(cline_re, re.VERBOSE)
OUTER_TO_INNER = -1
_transition_map = {
('chapter', 'section'): OUTER_TO_INNER,
('section', 'subsection'): OUTER_TO_INNER,
('subsection', 'subsubsection'): OUTER_TO_INNER,
('subsubsection', 'subsection'): 1,
('subsection', 'section'): 1,
('section', 'chapter'): 1,
('subsection', 'chapter'): 2,
('subsubsection', 'section'): 2,
('subsubsection', 'chapter'): 3,
}
def parse_toc(fp):
toc = top = []
stack = [toc]
level = 'chapter'
lineno = 0
while 1:
line = fp.readline()
if not line:
break
lineno = lineno + 1
m = cline_rx.match(line)
if m:
stype, snum, title, pageno = m.group(1, 2, 3, 4)
title = clean_title(title)
entry = (stype, snum, title, string.atoi(pageno), [])
if stype == level:
toc.append(entry)
else:
direction = _transition_map[(level, stype)]
if direction == OUTER_TO_INNER:
toc = toc[-1][-1]
stack.insert(0, toc)
toc.append(entry)
else:
for i in range(direction):
del stack[0]
toc = stack[0]
toc.append(entry)
level = stype
else:
sys.stderr.write("l.%s: " + line)
return top
hackscore_rx = re.compile(r"\\(hackscore|raisebox)\s*{[^}]*}")
title_rx = re.compile(r"\\[a-zA-Z]+\s*")
title_trans = string.maketrans("", "")
def clean_title(title):
title = hackscore_rx.sub("_", title)
while 1:
m = title_rx.search(title)
if m:
title = title[:m.start()] + title[m.end():]
else:
break
return string.translate(title, title_trans, "{}")
def write_toc(toc, fp):
for entry in toc:
write_toc_entry(entry, fp, 0)
def write_toc_entry(entry, fp, layer):
stype, snum, title, pageno, toc = entry
s = "\\pdfoutline goto name{page.%d}" % pageno
if toc:
s = "%s count -%d" % (s, len(toc))
if snum:
title = "%s %s" % (snum, title)
s = "%s {%s}\n" % (s, title)
fp.write(s)
for entry in toc:
write_toc_entry(entry, fp, layer + 1)
def main():
base, ext = os.path.splitext(sys.argv[1])
ext = ext or ".toc"
toc = parse_toc(open(base + ext))
write_toc(toc, open(base + ".bkm", "w"))
if __name__ == "__main__":
main()
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