Current File : //usr/share/perl/5.38/Pod/Html/Util.pm
package Pod::Html::Util;
use strict;
use Exporter 'import';
our $VERSION = 1.34; # Please keep in synch with lib/Pod/Html.pm
$VERSION = eval $VERSION;
our @EXPORT_OK = qw(
anchorify
html_escape
htmlify
process_command_line
relativize_url
trim_leading_whitespace
unixify
usage
);
use Config;
use File::Spec;
use File::Spec::Unix;
use Getopt::Long;
use Pod::Simple::XHTML;
use Text::Tabs;
use locale; # make \w work right in non-ASCII lands
=head1 NAME
Pod::Html::Util - helper functions for Pod-Html
=head1 SUBROUTINES
B<Note:> While these functions are importable on request from
F<Pod::Html::Util>, they are specifically intended for use within (a) the
F<Pod-Html> distribution (modules and test programs) shipped as part of the
Perl 5 core and (b) other parts of the core such as the F<installhtml>
program. These functions may be modified or relocated within the core
distribution -- or removed entirely therefrom -- as the core's needs evolve.
Hence, you should not rely on these functions in situations other than those
just described.
=cut
=head2 C<process_command_line()>
Process command-line switches (options). Returns a reference to a hash. Will
provide usage message if C<--help> switch is present or if parameters are
invalid.
Calling this subroutine may modify C<@ARGV>.
=cut
sub process_command_line {
my %opts = map { $_ => undef } (qw|
backlink cachedir css flush
header help htmldir htmlroot
index infile outfile poderrors
podpath podroot quiet recurse
title verbose
|);
unshift @ARGV, split ' ', $Config{pod2html} if $Config{pod2html};
my $result = GetOptions(\%opts,
'backlink!',
'cachedir=s',
'css=s',
'flush',
'help',
'header!',
'htmldir=s',
'htmlroot=s',
'index!',
'infile=s',
'outfile=s',
'poderrors!',
'podpath=s',
'podroot=s',
'quiet!',
'recurse!',
'title=s',
'verbose!',
);
usage("-", "invalid parameters") if not $result;
usage("-") if defined $opts{help}; # see if the user asked for help
$opts{help} = ""; # just to make -w shut-up.
return \%opts;
}
=head2 C<usage()>
Display customary Pod::Html usage information on STDERR.
=cut
sub usage {
my $podfile = shift;
warn "$0: $podfile: @_\n" if @_;
die <<END_OF_USAGE;
Usage: $0 --help --htmldir=<name> --htmlroot=<URL>
--infile=<name> --outfile=<name>
--podpath=<name>:...:<name> --podroot=<name>
--cachedir=<name> --flush --recurse --norecurse
--quiet --noquiet --verbose --noverbose
--index --noindex --backlink --nobacklink
--header --noheader --poderrors --nopoderrors
--css=<URL> --title=<name>
--[no]backlink - turn =head1 directives into links pointing to the top of
the page (off by default).
--cachedir - directory for the directory cache files.
--css - stylesheet URL
--flush - flushes the directory cache.
--[no]header - produce block header/footer (default is no headers).
--help - prints this message.
--htmldir - directory for resulting HTML files.
--htmlroot - http-server base directory from which all relative paths
in podpath stem (default is /).
--[no]index - generate an index at the top of the resulting html
(default behaviour).
--infile - filename for the pod to convert (input taken from stdin
by default).
--outfile - filename for the resulting html file (output sent to
stdout by default).
--[no]poderrors - include a POD ERRORS section in the output if there were
any POD errors in the input (default behavior).
--podpath - colon-separated list of directories containing library
pods (empty by default).
--podroot - filesystem base directory from which all relative paths
in podpath stem (default is .).
--[no]quiet - suppress some benign warning messages (default is off).
--[no]recurse - recurse on those subdirectories listed in podpath
(default behaviour).
--title - title that will appear in resulting html file.
--[no]verbose - self-explanatory (off by default).
END_OF_USAGE
}
=head2 C<unixify()>
Ensure that F<Pod::Html>'s internals and tests handle paths consistently
across Unix, Windows and VMS.
=cut
sub unixify {
my $full_path = shift;
return '' unless $full_path;
return $full_path if $full_path eq '/';
my ($vol, $dirs, $file) = File::Spec->splitpath($full_path);
my @dirs = $dirs eq File::Spec->curdir()
? (File::Spec::Unix->curdir())
: File::Spec->splitdir($dirs);
if (defined($vol) && $vol) {
$vol =~ s/:$// if $^O eq 'VMS';
$vol = uc $vol if $^O eq 'MSWin32';
if( $dirs[0] ) {
unshift @dirs, $vol;
}
else {
$dirs[0] = $vol;
}
}
unshift @dirs, '' if File::Spec->file_name_is_absolute($full_path);
return $file unless scalar(@dirs);
$full_path = File::Spec::Unix->catfile(File::Spec::Unix->catdir(@dirs),
$file);
$full_path =~ s|^\/|| if $^O eq 'MSWin32'; # C:/foo works, /C:/foo doesn't
$full_path =~ s/\^\././g if $^O eq 'VMS'; # unescape dots
return $full_path;
}
=head2 C<relativize_url()>
Convert an absolute URL to one relative to a base URL.
Assumes both end in a filename.
=cut
sub relativize_url {
my ($dest, $source) = @_;
# Remove each file from its path
my ($dest_volume, $dest_directory, $dest_file) =
File::Spec::Unix->splitpath( $dest );
$dest = File::Spec::Unix->catpath( $dest_volume, $dest_directory, '' );
my ($source_volume, $source_directory, $source_file) =
File::Spec::Unix->splitpath( $source );
$source = File::Spec::Unix->catpath( $source_volume, $source_directory, '' );
my $rel_path = '';
if ($dest ne '') {
$rel_path = File::Spec::Unix->abs2rel( $dest, $source );
}
if ($rel_path ne '' && substr( $rel_path, -1 ) ne '/') {
$rel_path .= "/$dest_file";
} else {
$rel_path .= "$dest_file";
}
return $rel_path;
}
=head2 C<html_escape()>
Make text safe for HTML.
=cut
sub html_escape {
my $rest = $_[0];
$rest =~ s/&/&/g;
$rest =~ s/</</g;
$rest =~ s/>/>/g;
$rest =~ s/"/"/g;
$rest =~ s/([[:^print:]])/sprintf("&#x%x;", ord($1))/aeg;
return $rest;
}
=head2 C<htmlify()>
htmlify($heading);
Converts a pod section specification to a suitable section specification
for HTML. Note that we keep spaces and special characters except
C<", ?> (Netscape problem) and the hyphen (writer's problem...).
=cut
sub htmlify {
my( $heading) = @_;
return Pod::Simple::XHTML->can("idify")->(undef, $heading, 1);
}
=head2 C<anchorify()>
anchorify(@heading);
Similar to C<htmlify()>, but turns non-alphanumerics into underscores. Note
that C<anchorify()> is not exported by default.
=cut
sub anchorify {
my ($anchor) = @_;
$anchor = htmlify($anchor);
$anchor =~ s/\W/_/g;
return $anchor;
}
=head2 C<trim_leading_whitespace()>
Remove any level of indentation (spaces or tabs) from each code block
consistently. Adapted from:
https://metacpan.org/source/HAARG/MetaCPAN-Pod-XHTML-0.002001/lib/Pod/Simple/Role/StripVerbatimIndent.pm
=cut
sub trim_leading_whitespace {
my ($para) = @_;
# Start by converting tabs to spaces
@$para = Text::Tabs::expand(@$para);
# Find the line with the least amount of indent, as that's our "base"
my @indent_levels = (sort(map { $_ =~ /^( *)./mg } @$para));
my $indent = $indent_levels[0] || "";
# Remove the "base" amount of indent from each line
foreach (@$para) {
$_ =~ s/^\Q$indent//mg;
}
return;
}
1;
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