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#!/usr/local/bin/perl
if( $ARGV[0] eq '-n' ){ # ǥХåץ
$DEBUG = 1;
shift @ARGV;
}
( @ARGV==1 )&&( -e $ARGV[0] )||die <<'__EOF__';
NAME
texinfo.perl - Next,Prev,Up λ꤬礱Ƥ @node Ԥ
䴰 Perl script
SYNOPSIS
texinfo.perl [-n] file
DESCRIPTION
Next,Prev,Up λ꤬礱Ƥ @node Ԥ@menu ˤڹ¤
ꤷ䴰 Perl script
Top node ޤǤ Texinfo source file ꤷƼ¹Ԥ롣
node ֤λȴطθФӥեνεϿϡɸ
顼Ϥ˽Ϥ롣
-n ץꤹȡºݤΥեϹԤ鷺
̤ɸϤ˽Ϥ롣
RULE
䴰§ϼ̤ꡣƱ̤ͥ䴰§줿硢˸
줿ȴطͥ褹롣
(1) Next 礱Ƥ
a) ̤ menu Ǽ¤Ǥ node
b) ˸Ф줿 node
(2) Prev 礱Ƥ
a) ̤ menu ¤Ǥ node
b) ľ˸Ф줿 node
(3) Up 礱Ƥ
a) ̤ node (menu ǤȤƻȤƤ node)
b) (@xref ʤ)ˤäƻȤƤ node
KNOWN BUGS
Ȥˤ @node Ԥ䴰Ŭڤ䴰Ǥ礬¿
ȤǤνɬס
file ˸줿ȡinfo ȤƤι¤ۤʤäƤ硢
Ŭڤ䴰ԲǽǤ롣
__EOF__
push( @files,$ARGV[0] );
$current='(DIR)';
$file_prev{'Top'} = '(DIR)';
$menu_up{'Top'} = '(DIR)';
$menu="";
# ƤΥեɤ߹ȴطФ
warn "Start analysis of references ...\n";
for $file ( @files ){
unless( open( FILE,"< $file" ) ){
warn "Can't open $file";
next;
}
warn "Reading $file ...\n";
my( @lines )=<FILE>;
close FILE;
for( @lines ){
if( /^\@node[ \t]+(\S.*)$/ ){ # @node Ԥ
warn " $_";
local( $this,$next,$prev,$up )=split(/[ \t]*,[ \t]*/,$1);
$file_next{$current} = $this;
$file_prev{$this} = $current;
$current = $this;
push( @node,$this );
} elsif( /^\@menu/ ){ # @menu Ԥ
$menu = $current;
} elsif( /^\@end[ \t]+menu/ ){ # menu ν
if( $menu_next{$current} ){
$menu_next{$menu} = $menu_next{$current};
}else{
warn " Warning: Can't find next menu item for $current\n" if $current ne 'Top';
}
$menu = "";
} elsif( $menu &&( /^\*[ \t]+([^:]+)::/ || /^\*[ \t]+[^:]+:[ \t]*([^\.]+)\./ )){
if(( $menu_up{$1} eq '' )||( $menu_up{$1} eq 'Top' )){
warn " menu item -> $1\n";
$menu_next{$menu} = $1 if $menu ne $current;
$menu_prev{$1} = $menu;
$menu_up{$1} = $current;
}else{
warn " menu item -> $1 is found. But ignored.\n";
}
$menu = $1;
} elsif( /\@(x|px|info)*ref\{([^\}]+)\}/ ){ # Ȥ
warn " reference -> $2 ($1ref)\n";
$xref{$2} = $current unless $xref{$2};
} elsif( /^\@include[ \t]+(\S.*)$/ ){
warn " include file = $1\n";
push( @files,$1 );
}
}
}
# ե
warn "\nStart rewriting ...\n";
for $file ( @files ){
unless( open( FILE,"< $file" ) ){
warn "Can't open $file";
next;
}
my( @lines )=<FILE>;
close FILE;
if( $DEBUG==0 ){
( -e "$file~" )&& unlink( "$file~" ) || warn "Can't unlink old backup file : $file\n";
( link( $file,"$file~" ) & unlink( $file ) )||warn "Can't make backup file : $file\n";
unless( open( FILE,"> $file" ) ){
warn "Can't open $file";
next;
}
select FILE;
warn "Rewrite $file ...\n";
}
for( @lines ){
if( /^\@node[ \t]+(\S.*)$/ ){ # @node Ԥ
warn " $_";
local( $this,$next,$prev,$up )=split(/[ \t]*,[ \t]*/,$1);
unless( $up ){
if( $menu_up{$this} ){
$up = $menu_up{$this};
warn " Up = \"$up\" (menu item)\n";
}elsif( $xref{$this} ){
$up = $xref{$this};
warn " Up = \"$up\" (cross reference)\n";
}else {
$up = 'Top';
warn " Up = \"Top\" (forced)\n";
}
}
unless( $next ){
if( $menu_next{$this} ){
$next = $menu_next{$this};
warn " Next = \"$next\" (menu item)\n";
}elsif( $file_next{$this} ){
$next = $file_next{$this};
warn " Next = \"$next\" (file sequence)\n";
}elsif( $up ne 'Top' ){
$next = 'Top';
warn " Next = \"Top\" (forced)\n";
}else{
warn " Next = nil\n";
}
}
unless( $prev ){
if( $menu_prev{$this} ){
$prev = $menu_prev{$this};
warn " Prev = \"$prev\" (menu item)\n";
}elsif( $file_prev{$this} ){
$prev = $file_prev{$this};
warn " Prev = \"$prev\" (file sequence)\n";
}else{
$prev = 'Top';
warn " Prev = \"Top\" (forced)\n";
}
}
print "\@node $this, $next, $prev, $up\n";
} else {
print;
}
}
if( $DEBUG==0 ){
close FILE;
select STDOUT;
}
}
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