247 lines
4.6 KiB
Bash
247 lines
4.6 KiB
Bash
#!/bin/sh
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#
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# Copyright (C) 2001 Graeme Walker <graeme_walker@users.sourceforge.net>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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#
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# ===
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#
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# txt2html.sh
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#
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# usage: txt2html.sh [-a <awk-binary>] <input-file>
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#
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awk="awk"
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if test "${1}" = "-a"
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then
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shift
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if test "${1}" != ""
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then
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awk="${1}"
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fi
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shift
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fi
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file="${1}"
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if test "${file}" = ""
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then
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echo usage: `basename $0` '<txt-file>' >&2
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exit 2
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fi
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if test \! -f "${file}"
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then
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echo `basename $0`: no such file: ${file} >&2
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exit 1
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fi
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title="`basename ${file}`"
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if test "${2}" != ""
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then
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title="${2}"
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fi
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# ===
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Main()
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{
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${awk} -v title="${1}" '
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BEGIN {
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printf( "<html>\n" )
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printf( "<head>\n" )
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printf( "<title>%s</title>\n" , title )
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printf( "</head>\n" )
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printf( "<body>\n" )
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}
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function escape( line )
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{
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gsub( "&" , "\\&" , line )
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gsub( "<" , "\\<" , line )
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gsub( ">" , "\\>" , line )
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return line
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}
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function dequote( line )
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{
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quote = "\""
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not_quote = "[^" quote "]"
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gsub( quote not_quote "*" quote , "<b><em>&</em></b>" , line )
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gsub( "<em>" quote , "<em>" , line )
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gsub( quote "</em>" , "</em>" , line )
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return line
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}
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function fn( line )
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{
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gsub( "[^[:space:]][^[:space:]]*\\(\\)" , "<i>&</i>" , line )
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return line
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}
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function output( line )
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{
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printf( "%s\n" , fn(dequote(escape(line))) )
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}
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function tagOutput( line , tag )
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{
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printf( "<%s>%s</%s>\n" , tag , fn(dequote(escape(line))) , tag )
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}
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function process( line , next_ )
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{
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is_blank = match( line , "^[[:space:]]*$" )
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is_sub_para = match( line , "^[[:space:]][[:space:]][^[:space:]]" )
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is_code = match( line , "^[[:space:]]" ) && !is_sub_para
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is_heading = match( next_ , "^==*[[:space:]]*$" )
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is_sub_heading = match( next_ , "^--*[[:space:]]*$" )
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is_list_item = match( line , "^\\* " )
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is_numbered_item = match( line , "^\\([[:digit:]][[:digit:]]*\\)" )
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is_heading_line = match( line , "^==*[[:space:]]*$" )
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is_sub_heading_line = match( line , "^--*[[:space:]]*$" )
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if( is_blank )
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{
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printf( "<p><br>\n" )
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}
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else if( is_code )
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{
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tagOutput( line , "pre" )
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}
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else if( is_sub_para )
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{
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tagOutput( line , "sub" )
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}
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else if( is_list_item )
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{
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gsub( "^\\* " , "" , line )
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tagOutput( line , "li" )
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}
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else if( is_numbered_item )
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{
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gsub( "^\\([[:digit:]][[:digit:]]*\\) " , "" , line )
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tagOutput( line , "LI" )
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}
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else if( is_heading )
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{
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printf( "<h1>%s</h1>\n" , line )
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}
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else if( is_sub_heading )
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{
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printf( "<h2>%s</h2>\n" , line )
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}
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else if( !is_heading_line && !is_sub_heading_line )
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{
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output( line )
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}
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}
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{
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if( NR != 1 )
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process( previous , $0 )
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previous = $0
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}
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END {
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process( previous , "" )
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printf( "</body>\n" )
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printf( "</html>\n" )
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} '
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}
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# ==
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AugmentLists()
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{
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${awk} -v item_tag="${1}" -v list_tag="${2}" '
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{
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line = $0
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is_list_item = match( line , "^<" item_tag ">.*</" item_tag ">$" )
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if( is_list_item && !in_list )
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printf( "<%s>\n" , list_tag )
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else if( in_list && !is_list_item )
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printf( "</%s>\n" , list_tag )
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print
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in_list = is_list_item
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} '
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}
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# ==
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Elide()
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{
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${awk} -v tag="${1}" '
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{
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line = $0
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is_tag_line = match( line , "^<" tag ">.*</" tag ">$" )
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core = substr( line , length(tag)+3 , length(line)-length(tag)-length(tag)-5 )
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if( is_tag_line && !in_tag )
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printf( "<%s>%s" , tag , core )
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else if( is_tag_line && in_tag )
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printf( "\n%s" , core )
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else if( !is_tag_line && in_tag )
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printf( "</%s>\n%s\n" , tag , line )
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else
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print line
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in_tag = is_tag_line
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} '
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}
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# ==
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Compress()
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{
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${awk} '
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function process( previous , line , next_ )
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{
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re_blank = "^<p><br>$"
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re_heading = "^<[Hh][[:digit:]]>"
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re_pre_start = "^<pre>"
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re_pre_end = "</pre>$"
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if( match(line,re_blank) && ( match(next_,re_heading) || match(previous,re_heading) ) )
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{
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}
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else if( match(line,re_blank) && match(next_,re_pre_start) )
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{
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}
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else
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{
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print line
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}
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}
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{
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if( NR >= 2 )
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process( l2 , l1 , $0 )
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l2 = l1
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l1 = $0
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}
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END {
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process( l2 , l1 , "" )
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process( l1 , "" , "" )
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}
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'
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}
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# ==
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cat "${file}" | Main "${title}" | Compress | AugmentLists li bl | AugmentLists LI ol | Elide "sub" | Elide "pre"
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