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# Copyright 2006 Lennart Borgman, http://OurComments.org/. All rights
# reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING. If not, write to the
# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
# Boston, MA 02110-1301, USA.
package PathSubs;
#####################################################
### This package contains general path handling
### routines and some win32 specific dito.
### The latter should ev be moved to a new module!
#####################################################
use strict;
use File::Spec;
### Absolute path names
sub is_abs_path ($) {
my $path = shift;
return 0 if $path eq "";
return 1 if File::Spec->file_name_is_absolute($path);
#return 1 if substr($path, 1, 1) eq ":"; # MSWin32
#return 1 if substr($path, 0, 1) eq "/";
return 1 if $path =~ /^https?:/i;
return 1 if $path =~ /^file:/i;
return 1 if $path =~ /^javascript:/i;
return 1 if $path =~ /^mailto:/i;
}
sub is_abs_netpath($) {
my $path = shift;
return 1 if $path =~ /^https?:/i;
# New
return 1 if $path =~ /^ftp:/i;
return 1 if $path =~ /^mailto:/i;
}
sub uniq_file($) {
my $fname = shift;
$fname =~ s!^\s+|\s+$!!g;
return "" if ($fname eq "");
$fname = File::Spec->rel2abs($fname);
if (!File::Spec->file_name_is_absolute($fname)) {
die "File name is not absolute: $fname";
}
#print STDERR "uniq_file($fname)\n";
$fname =~ tr!\\!/!;
if (-e $fname) {
#print STDERR "exists $fname\n";
### There is an error in 522, compensate for this!
#die substr($fname, -1);
if (substr($fname, -1) eq "/") { chop $fname; }
#print STDERR "exists $fname\n";
### Translate ..
if (substr($fname, 1, 1) eq ":") {
my $ffname = Win32::GetFullPathName($fname);
### Get case
my $lfname = Win32::GetLongPathName($ffname);
#print STDERR "lexists $lfname\n";
$fname = $lfname if ($lfname ne "");
}
} else {
#print STDERR "NOT exists $fname\n";
if (substr($fname, -1) eq "/") { chop $fname; }
my $head = "";
if (substr($fname, 0, 2) eq "//") {
$head = "//";
$fname = substr($fname, 2);
}
my @fname = split("/", $fname);
my $tail = pop @fname;
$fname = uniq_dir($head . join("/", @fname)) . $tail;
}
if (substr($fname, 1, 1) eq ":") {
$fname = uc(substr($fname, 0, 1)) . substr($fname, 1);
#print STDERR "fname $fname\n";
}
$fname =~ tr!\\!/!;
#print STDERR "fname ($fname)\n";
return $fname;
}
sub uniq_dir($) {
my $dir = shift;
my $uq_dir = uniq_file($dir);
if (substr($uq_dir, -1) ne "/") { $uq_dir .= "/"; }
return $uq_dir;
}
### Relative paths
sub _get_link_root($) {
my $lnk = shift;
if ($lnk =~ m!^(/|ftp://[^/]*|https?://[^/]*|[a-z]:/)!i) {
return $1;
} else {
return "";
}
}
sub resolve_dotdot($) {
my $orig_url = shift;
my $root = _get_link_root($orig_url);
return $orig_url if length($root) == length($orig_url);
my $url = substr($orig_url, length($root));
if (substr($root, -1) eq "/") {
chop $root;
$url = "/$url";
}
#die "$root\n$url";
my $iPosSearch = 2;
#print "url=$url\n";
while ((my $iPos = index($url, "/../", $iPosSearch)) > -1) {
my $sLeft = substr($url, 0, $iPos);
if (substr($sLeft, -2) eq "..") {
$iPosSearch += 3;
next;
}
my $sRight = substr($url, $iPos+3);
#print "url=$url\n";
#print "iPos=$iPos\n";
#print "sLeft=$sLeft\n";
$sLeft =~ s!/[^/]*$!!;
#print "sLeft=$sLeft\n";
#print "sRight=$sRight\n";
$url = $sLeft . $sRight;
#print "\t***url=$url\n";
#print "url=$url\n";
}
if (index($url, "../") > -1) {
return $orig_url;
}
return $root . $url;
}
sub mk_relative_link($$;$) {
my $from = shift;
my $to = shift;
my $norm = shift;
if ($norm) {
$from = uniq_file($from);
$to = uniq_file($to);
}
if (-e $from) {
$from = uniq_file($from);
} else {
$from = resolve_dotdot($from);
}
if (-e $to) {
$to = uniq_file($to);
} else {
$to = resolve_dotdot($to);
}
my $root_from = _get_link_root($from);
my $root_to = _get_link_root($to );
if ($root_from ne $root_to) {
return $to;
}
my @from = split "/", $from;
my @to = split "/", $to;
while (@to) {
last if ($to[0] ne $from[0]);
shift @to;
shift @from;
}
if (@to == 1 && @from == 1) {
if (length($to[0]) > length($from[0])) {
if (substr($to[0], 0, length($from[0])+1) eq ($from[0] . "#")) {
return substr($to[0], length($from[0]));
}
}
}
my $rl;
for (1..$#from) { $rl .= "../"; }
$rl .= join("/", @to);
return $rl;
}
sub mk_absolute_link($$) {
my $from = shift;
my $rel_to = shift;
my $abs = $from;
$abs =~ s![^/]*$!!;
$abs .= $rel_to;
if (!is_abs_netpath($abs)) { $abs = uniq_file($abs); }
$abs;
}
1;
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