/usr/share/perl5/Tk/Pod/Cache.pm is in libtk-pod-perl 0.9942-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 | # -*- perl -*-
#
# Author: Slaven Rezic
#
# Copyright (C) 2002,2012 Slaven Rezic. All rights reserved.
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# Mail: slaven@rezic.de
# WWW: http://www.rezic.de/eserte/
#
package Tk::Pod::Cache;
use strict;
use vars qw($VERSION $MAX_CACHE %CACHE);
BEGIN { # Make a DEBUG constant very first thing...
if(defined &DEBUG) {
} elsif(($ENV{'TKPODDEBUG'} || '') =~ m/^(\d+)/) { # untaint
my $debug = $1;
*DEBUG = sub () { $debug };
} else {
*DEBUG = sub () {0};
}
}
$VERSION = '5.02';
$MAX_CACHE = 20; # documents # XXX not yet used, LRU etc...
sub add_to_cache {
my($w, $pod) = @_;
$pod = $w->cget(-path) if !defined $pod;
return if !defined $pod;
return if $CACHE{$pod}; # XXX check for recentness
DEBUG and warn "Add contents for $pod to cache.\n";
$CACHE{$pod} = $w->dump_contents;
}
sub get_from_cache {
my($w, $pod) = @_;
$pod = $w->cget(-path) if !defined $pod;
return 0 if !$CACHE{$pod};
# XXX check for recentness
$w->delete("1.0", "end");
DEBUG and warn "Restore contents for $pod from cache.\n";
$w->restore_contents($CACHE{$pod});
1;
}
sub delete_from_cache {
my($w, $pod) = @_;
$pod = $w->cget(-path) if !defined $pod;
return if !defined $pod;
DEBUG and warn "Delete contents for $pod from cache.\n";
delete $CACHE{$pod};
}
sub clear_cache {
%CACHE = ();
}
sub dump_contents {
my $w = shift;
my @dump = $w->dump('-all', "1.0", "end");
if (@dump == 0) {
warn "Workaround strange bug under RedHat 8.0 --- try dump again...";
@dump = $w->dump('-all', "1.0", "end");
if (@dump == 0) {
warn "Giving up, cache disabled for current page";
return undef;
}
}
my %tags_def;
foreach my $tag ($w->tagNames) {
# XXX check for used/existing tags missing
my @tag_def;
foreach my $item ($w->tagConfigure($tag)) {
my $value = $item->[4];
my $option = $item->[0];
push @tag_def, $option, $value;
}
$tags_def{$tag} = \@tag_def;
}
return {Dump => \@dump,
Tags => \%tags_def,
Sections => $w->{'sections'},
PodTitle => $w->{'pod_title'},
};
}
sub restore_contents {
my($w, $def) = @_;
my $dumpref = $def->{Dump};
my $tagref = $def->{Tags};
$w->{'sections'} = $def->{Sections};
$w->{'pod_title'} = $def->{PodTitle};
$w->toplevel->title( "Tkpod: " . $w->{'pod_title'} . " (restoring)");
$w->idletasks;
# XXX Is it bad form to manipulate the top level?
my $process_no;
$w->{ProcessNo}++;
$process_no = $w->{ProcessNo};
if ($tagref) {
while(my($tag,$def) = each %$tagref) {
#XXX tagDelete?
$w->tagConfigure($tag, @$def);
}
}
my @taglist;
my $last_update = Tk::timeofday();
for(my $i=0; $i<$#$dumpref; $i+=3) {
my($key, $val, $index) = @{$dumpref}[$i..$i+2];
if ($key eq 'text') {
$w->insert($index, $val, [@taglist]);
} elsif ($key eq 'tagon') {
unshift @taglist, $val;
} elsif ($key eq 'tagoff') {
my $j;
for (0 .. $#taglist) {
if ($taglist[$_] eq $val) {
$j = $_;
last;
}
}
if (defined $j) {
splice @taglist, $j, 1;
}
$w->tag('remove', $val, 'insert');
} elsif ($key eq 'mark') {
$w->markSet($val, $index); # XXX ->see() to current or insert?
} elsif ($key eq 'windows') {
die "not yet supported";
} elsif ($key eq 'image') {
die "not yet supported";
} elsif ($key eq 'imgdef') {
die "not yet supported";
}
if (Tk::timeofday() > $last_update+0.5) { # XXX make configurable
$w->update;
$last_update = Tk::timeofday();
do { warn "ABORT!"; return } if $w->{ProcessNo} != $process_no;
}
}
$w->parent->add_section_menu if $w->parent->can('add_section_menu');
$w->Callback('-poddone', $w->cget(-file));
$w->toplevel->title( "Tkpod: " . $w->{'pod_title'});
}
1;
__END__
=head1 NAME
Tk::Pod::Cache - internal Tk-Pod module for cache control
=head1 DESCRIPTION
No user-servicable parts here.
=cut
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