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167 lines
6.6 KiB
Python
Executable file
167 lines
6.6 KiB
Python
Executable file
#! /usr/bin/env python
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# A somewhat-generalized FAQ-to-HTML converter (by Ka-Ping Yee, 10 Sept 96)
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# Reads a text file given on standard input or named as first argument, and
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# generates HTML 2.0 on standard output. Recognizes these constructions:
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#
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# HTML element pattern at the beginning of a line
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#
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# section heading (<number><period>)+<space>
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# numbered list element <1-2 spaces>(<number><period>)+<space>
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# unnumbered list element <0-2 spaces><hyphen or asterisk><space>
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# preformatted section <more than two spaces>
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#
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# Heading level is determined by the number of (<number><period>) segments.
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# Blank lines force a separation of elements; if none of the above four
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# types is indicated, a new paragraph begins. A line beginning with many
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# spaces is interpreted as a continuation (instead of preformatted) after
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# a list element. Headings are anchored; paragraphs starting with "Q." are
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# emphasized, and those marked with "A." get their first sentence emphasized.
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#
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# Hyperlinks are created from references to:
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# URLs, explicitly marked using <URL:scheme://host...>
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# other questions, of the form "question <number>(<period><number>)*"
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# sections, of the form "section <number>".
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import sys, string, regex, regsub, regex_syntax
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regex.set_syntax(regex_syntax.RE_SYNTAX_AWK)
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# --------------------------------------------------------- regular expressions
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orditemprog = regex.compile(' ?([1-9][0-9]*\.)+ +')
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itemprog = regex.compile(' ? ?[-*] +')
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headingprog = regex.compile('([1-9][0-9]*\.)+ +')
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prefmtprog = regex.compile(' ')
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blankprog = regex.compile('^[ \t\r\n]$')
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questionprog = regex.compile(' *Q\. +')
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answerprog = regex.compile(' *A\. +')
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sentprog = regex.compile('(([^.:;?!(]|[.:;?!][^ \t\r\n])+[.:;?!]?)')
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mailhdrprog = regex.compile('^(Subject|Newsgroups|Followup-To|From|Reply-To'
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'|Approved|Archive-Name|Version|Last-Modified): +', regex.casefold)
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urlprog = regex.compile('<URL:([^&]+)>')
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addrprog = regex.compile('<([^>@:]+@[^&@:]+)>')
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qrefprog = regex.compile('question +([1-9](\.[0-9]+)*)')
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srefprog = regex.compile('section +([1-9][0-9]*)')
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entityprog = regex.compile('[&<>]')
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# ------------------------------------------------------------ global variables
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body = []
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ollev = ullev = 0
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element = content = secnum = version = ''
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# ----------------------------------------------------- for making nested lists
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def dnol():
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global body, ollev
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ollev = ollev + 1
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if body[-1] == '</li>': del body[-1]
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body.append('<ol>')
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def upol():
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global body, ollev
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ollev = ollev - 1
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body.append(ollev and '</ol></li>' or '</ol>')
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# --------------------------------- output one element and convert its contents
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def spew(clearol=0, clearul=0):
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global content, body, ollev, ullev
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if content:
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if entityprog.search(content) > -1:
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content = regsub.gsub('&', '&', content)
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content = regsub.gsub('<', '<', content)
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content = regsub.gsub('>', '>', content)
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n = questionprog.match(content)
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if n > 0:
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content = '<em>' + content[n:] + '</em>'
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if ollev: # question reference in index
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fragid = regsub.gsub('^ +|\.? +$', '', secnum)
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content = '<a href="#%s">%s</a>' % (fragid, content)
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if element[0] == 'h': # heading in the main text
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fragid = regsub.gsub('^ +|\.? +$', '', secnum)
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content = secnum + '<a name="%s">%s</a>' % (fragid, content)
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n = answerprog.match(content)
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if n > 0: # answer paragraph
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content = regsub.sub(sentprog, '<strong>\\1</strong>', content[n:])
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body.append('<' + element + '>' + content)
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body.append('</' + element + '>')
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content = ''
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while clearol and ollev: upol()
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if clearul and ullev: body.append('</ul>'); ullev = 0
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# ---------------------------------------------------------------- main program
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faq = len(sys.argv)>1 and sys.argv[1] and open(sys.argv[1]) or sys.stdin
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lines = faq.readlines()
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for line in lines:
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if line[2:9] == '=======': # <hr> will appear *before*
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body.append('<hr>') # the underlined heading
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continue
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n = orditemprog.match(line)
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if n > 0: # make ordered list item
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spew(0, 'clear ul')
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secnum = line[:n]
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level = string.count(secnum, '.')
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while level > ollev: dnol()
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while level < ollev: upol()
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element, content = 'li', line[n:]
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continue
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n = itemprog.match(line)
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if n > 0: # make unordered list item
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spew('clear ol', 0)
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if ullev == 0: body.append('<ul>'); ullev = 1
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element, content = 'li', line[n:]
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continue
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n = headingprog.match(line)
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if n > 0: # make heading element
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spew('clear ol', 'clear ul')
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secnum = line[:n]
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sys.stderr.write(line)
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element, content = 'h%d' % string.count(secnum, '.'), line[n:]
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continue
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n = 0
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if not secnum: # haven't hit body yet
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n = mailhdrprog.match(line)
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v = version and -1 or regex.match('Version: ', line)
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if v > 0 and not version: version = line[v:]
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if n <= 0 and element != 'li': # not pre if after a list item
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n = prefmtprog.match(line)
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if n > 0: # make preformatted element
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if element == 'pre':
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content = content + line
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else:
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spew('clear ol', 'clear ul')
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element, content = 'pre', line
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continue
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if blankprog.match(line) > 0: # force a new element
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spew()
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element = ''
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elif element: # continue current element
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content = content + line
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else: # no element; make paragraph
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spew('clear ol', 'clear ul')
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element, content = 'p', line
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spew() # output last element
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body = string.joinfields(body, '')
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body = regsub.gsub(urlprog, '<a href="\\1">\\1</a>', body)
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body = regsub.gsub(addrprog, '<a href="mailto:\\1">\\1</a>', body)
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body = regsub.gsub(qrefprog, '<a href="#\\1">question \\1</a>', body)
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body = regsub.gsub(srefprog, '<a href="#\\1">section \\1</a>', body)
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print '<!doctype html public "-//IETF//DTD HTML 2.0//EN"><html>'
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print '<head><title>Python Frequently-Asked Questions v' + version
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print "</title></head><body>(This file was generated using Ping's"
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print '<a href="faq2html.py">faq2html.py</a>.)'
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print body + '</body></html>'
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