239 lines
5.9 KiB
Plaintext
239 lines
5.9 KiB
Plaintext
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#! /usr/bin/perl
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#
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# Copyright (c) 2005-2006 Motoyuki Kasahara
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. Neither the name of the project nor the names of its contributors
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# may be used to endorse or promote products derived from this software
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# without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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#
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# html-split -- split an HTML file.
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#
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# Usage:
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# html-split [option...] input-file
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#
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# `html-split' splits an HTML file with heading tags (<h1>...<h6>).
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# Suppose that `input-file' is `foo.html', HTML files splitted by
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# `html-split' are `foo-0.html', `foo-1.html', and so on.
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#
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# Options:
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# -Z do not add `-0' to the first split.
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# -l LEVEL split with this heading level
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# (default: h2)
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# -p PREFIX prefix of splitted HTML files.
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# -s SUFFIX suffix of splitted HTML files.
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# (default: html)
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# -w WIDTH minimum width of split number.
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# (default: 1)
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# -t TOC fragment name of `Table of Contents'.
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# (default: toc)
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#
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require 5.005;
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use Getopt::Std;
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use File::Basename;
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#
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# Usage
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#
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my $usage = "Usage: $0 [option...] input-file\n";
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#
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# Variables
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#
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my $in_file;
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my $out_prefix;
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my $out_suffix;
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my $counter_width = 1;
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my $split_level = 2;
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my $toc_tag = 'toc';
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my $supress_zero_flag = 0;
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my @toc = ();
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my @indice = ();
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my @preamble = ();
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my $toc_page = 0;
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#
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# Parse command line arguments.
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#
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my %options;
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getopts('Zl:w:p:s:t:', \%options) or die $usage;
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die $usage if (@ARGV != 1);
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$in_file = $ARGV[0];
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if (defined($options{l})) {
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$options{l} =~ s/^h//;
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$split_level = $options{l};
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}
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$counter_width = $options{w} if (defined($options{w}));
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$supress_zero_flag = defined($options{Z});
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$toc_tag = $options{t} if (defined($options{t}));
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if (defined($options{p})) {
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$out_prefix = $options{p};
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} else {
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$out_prefix = basename($in_file, '.htm', '.html');
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}
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if (defined($options{s})) {
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$out_suffix = $options{s};
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} elsif ($in_file =~ m|\.htm$|) {
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$out_suffix = 'htm';
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} else {
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$out_suffix = 'html';
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}
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#
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# Read an HTML file.
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#
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if (!open(IN_FILE, "< $in_file")) {
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die "$0: failed to open the file, $!: $in_file\n";
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}
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my $toc_found = 0;
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my $page = 0;
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while (<IN_FILE>) {
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last if (m|^<body>|);
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push(@preamble, $_);
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}
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while (<IN_FILE>) {
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chomp;
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last if (m|^</body>|);
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if (m|^<h([1-6])>| && $1 <= $split_level) {
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$page++ if (@toc > 0);
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push(@toc, $_);
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}
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if (m|<a name=\"([^\"]+)\">|) {
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my $tag = $1;
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if ($tag eq $toc_tag) {
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$toc_page = $page;
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$toc_found = 1;
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}
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push(@indice, {'tag' => $tag, 'page' => $page});
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}
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}
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close(IN_FILE);
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if (!$toc_found) {
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die "$0: <a name=\"$toc_tag\"> not found\n";
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}
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#
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# Generate splitted HTML files.
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#
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if (!open(IN_FILE, "< $in_file")) {
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die "$0: failed to open the file, $!: $in_file\n";
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}
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while (<IN_FILE>) {
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last if (m|^<body>|);
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}
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for (my $page = 0; $page < @toc; $page++) {
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my $bar = '';
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if ($page > 0) {
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$bar .= sprintf("[<a href=\"%s\"><3E><><EFBFBD><EFBFBD></a>] ",
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splitted_file_name($page - 1));
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}
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if ($page + 1 < @toc) {
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$bar .= sprintf("[<a href=\"%s\"><3E><><EFBFBD><EFBFBD></a>] ",
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splitted_file_name($page + 1));
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}
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$bar .= sprintf("[<a href=\"%s\#%s\"><3E>ܼ<EFBFBD></a>] ",
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splitted_file_name($toc_page), $toc_tag);
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my $out_file = splitted_file_name($page);
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if (!open(OUT_FILE, "> $out_file")) {
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die "$0: failed to open the file, $!: $out_file\n";
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}
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foreach my $j (@preamble) {
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print OUT_FILE $j;
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}
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print OUT_FILE "<body>\n";
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print OUT_FILE "<p>\n", $bar, "\n</p>\n<hr>\n";
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print OUT_FILE $toc[$page], "\n";
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for (;;) {
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$_ = <IN_FILE>;
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chomp;
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if (!defined($_) || m|^</body>|) {
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1 while (<IN_FILE>);
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last;
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}
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elsif (m|^<h([1-6])>| && $1 <= $split_level) {
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next if ($page == 0 && $_ eq $toc[$page]);
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last;
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}
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1 while (s|<a href="\#([^\"]+)">|&rewrite_href($1)|e);
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print OUT_FILE $_, "\n";
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}
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print OUT_FILE "<hr>\n<p>\n", $bar, "\n</p>\n";
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print OUT_FILE "</body>\n";
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print OUT_FILE "</html>\n";
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close(OUT_FILE);
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}
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close(IN_FILE);
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#
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# Return n'th splitted file name.
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#
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sub splitted_file_name ($) {
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my ($n) = @_;
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if ($n == 0 && $supress_zero_flag) {
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return sprintf("%s.%s", $out_prefix, $out_suffix);
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} else {
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return sprintf("%s-%0${counter_width}d.%s",
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$out_prefix, $n, $out_suffix);
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}
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}
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#
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# Rewrite <a href="...">.
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#
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sub rewrite_href ($) {
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my ($tag) = @_;
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for (my $i = 0; $i < @indice; $i++) {
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if ($indice[$i]->{tag} eq $tag) {
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return sprintf("<a href=\"%s\#%s\">",
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splitted_file_name($indice[$i]->{page}), $tag);
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}
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}
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warn "$0: unknown tag \`$tag'\n";
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return "<a href=\"$tag\">";
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}
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