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#
# Ensure that all headings are below a permissible maximum (like h3).
# If not, all heading levels will be changed to conform.
# Note: this may create "illegal" heading levels, like h7 and beyond.
#
import sys
from xml.dom import minidom, XHTML_NAMESPACE
# determine permissible minimimum heading
if '--min' in sys.argv:
minhead = int(sys.argv[sys.argv.index('--min')+1])
else:
minhead=3
# parse input stream
doc = minidom.parse(sys.stdin)
# search for headings below the permissable minimum
first=minhead
for i in range(1,minhead):
if doc.getElementsByTagName('h%d' % i):
first=i
break
# if found, bump all headings so that the top is the permissible minimum
if first < minhead:
for i in range(6,0,-1):
for oldhead in doc.getElementsByTagName('h%d' % i):
newhead = doc.createElementNS(XHTML_NAMESPACE, 'h%d' % (i+minhead-first))
for child in oldhead.childNodes:
newhead.appendChild(child)
oldhead.parentNode.replaceChild(newhead, oldhead)
# return (possibly modified) document
print doc.toxml('utf-8')