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#!/usr/bin/env python
# -*- coding: iso-8859-1 -*-
#******************************************************************************\
#* $Source$
#* $Id$
#*
#* Copyright (C) 2003, Martin Blais <blais@furius.ca>
#*
#* This program is free software; you can redistribute it and/or modify
#* it under the terms of the GNU General Public License as published by
#* the Free Software Foundation; either version 2 of the License, or
#* (at your option) any later version.
#*
#* This program is distributed in the hope that it will be useful,
#* but WITHOUT ANY WARRANTY; without even the implied warranty of
#* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#* GNU General Public License for more details.
#*
#* You should have received a copy of the GNU General Public License
#* along with this program; if not, write to the Free Software
#* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#*
#*****************************************************************************/
"""docutils-movesec [<options>] <newchar> <file>
Move docutils section underlines one level up or down. This program can be used
to change the level of your sections within a restructured text file.
'newchar' is the character to use for the replacing the bottom-level (or
top-level if --down) section underlines.
Note: the whitespace characters that appear after the section underlines are
preserved.
Note2: this might screw up transition markers.
"""
__version__ = "$Revision$"
__author__ = "Martin Blais <blais@furius.ca>"
#===============================================================================
# EXTERNAL DECLARATIONS
#===============================================================================
import sys, re
#===============================================================================
# LOCAL DECLARATIONS
#===============================================================================
# regular expression to get lines with no whitespace in front and a single word.
secre = re.compile('^([^\s]+)\s*$')
#-------------------------------------------------------------------------------
#
def getlines( fn ):
"""Opens the given file and detects the section lines. Return the line
numbers."""
if fn == '-':
f = sys.stdin
else:
try:
f = open(fn, 'r')
except IOError, e:
raise SystemExit("Error: opening file '%s':\n%s" % (fn, str(e)))
filelines = f.readlines()
minthres = 3
seclines = []
lc = -1
for l in filelines:
lc += 1
mo = secre.match(l)
if not mo:
continue
l = mo.group(1)
if len(l) < minthres:
continue
c = l[0]
skip = 0
for cc in l[1:]:
if c != cc:
skip = 1
break
if not skip:
seclines.append(lc)
return seclines, filelines
#-------------------------------------------------------------------------------
#
def compute_order( seclines, filelines ):
"""Compute ordering characters."""
secorder = []
prevord = -1
for sl in seclines:
l = filelines[sl]
try:
prevord = secorder.index(l[0])
except ValueError:
if prevord != len(secorder) - 1:
raise SystemExit(\
"Error: sections are not consistent at line '%d'" % (sl+1))
prevord = len(secorder)
secorder.append(l[0])
return secorder
#===============================================================================
# MAIN
#===============================================================================
#-------------------------------------------------------------------------------
#
def main():
debug = False
import optparse
parser = optparse.OptionParser(__doc__)
parser.add_option('-u', '--up', action="store_true", dest="direction",
default=True,
help="specify move sections up (default)")
parser.add_option('-d', '--down', action="store_false", dest="direction",
help="specify move sections down")
opts, args = parser.parse_args()
if len(args) != 2:
raise SystemExit('Error: please a new character and a single filename.')
newchar, fn = args
seclines, filelines = getlines(fn)
secorder = compute_order(seclines, filelines)
# create new output order.
if opts.direction: # up
neworder = [newchar] + secorder[:-1]
else: # down
neworder = secorder[1:] + [newchar]
# compute a mapping of old to new
omap = {}
for i in xrange(len(secorder)):
omap[ secorder[i] ] = neworder[i]
if debug:
for sl in seclines:
l = filelines[sl]
print secorder.index(l[0]), l,
from pprint import pprint
print secorder
print neworder
pprint(omap)
# perform replacement of desired line, preserve original whitespace.
for sl in seclines:
l = filelines[sl]
nc = len(l.strip())
filelines[sl] = omap[ l[0] ] * nc + l[nc:]
# output.
for l in filelines:
sys.stdout.write(l)
if __name__ == '__main__':
main()
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