On November 2, 1998 at 11:13, Emery Ford wrote:
Another related problem seems to occur --- The NEXTLINK resource
variable is null for the first message, as is the PREVLINK resource
for the last message. I am using the MULTIPG and REVERSE resource
variables, in case that might have anything to do with it.
REVERSE is what shows the problem. This is a bug introduced in v2.3.0
due to the reimplmentation of resource variable interpolation.
I'll create another (bug fix) release this weekend. Until then
a fixed mhrcvars.pl files is attached to this message. You can
replace the mhrcvars.pl with one in the distribution.
--ewh
##---------------------------------------------------------------------------##
## File:
## @(#) mhrcvars.pl 2.5 98/11/02 22:32:45
## Author:
## Earl Hood earlhood(_at_)usa(_dot_)net
## Description:
## Defines routine for expanding resource variables.
##---------------------------------------------------------------------------##
## MHonArc -- Internet mail-to-HTML converter
## Copyright (C) 1996-1998 Earl Hood, earlhood(_at_)usa(_dot_)net
##
## 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 2 of the License, 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; if not, write to the Free Software
## Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
## 02111-1307, USA
##---------------------------------------------------------------------------##
package mhonarc;
## Mapping of old resource variables to current versions.
my %old2new = (
'FIRSTPG' => [ 'PG', 'FIRST' ],
'LASTPG' => [ 'PG', 'LAST' ],
'NEXTBUTTON' => [ 'BUTTON', 'NEXT' ],
'NEXTFROM' => [ 'FROM', 'NEXT' ],
'NEXTFROMADDR' => [ 'FROMADDR', 'NEXT' ],
'NEXTFROMNAME' => [ 'FROMNAME', 'NEXT' ],
'NEXTLINK' => [ 'LINK', 'NEXT' ],
'NEXTMSG' => [ 'MSG', 'NEXT' ],
'NEXTMSGNUM' => [ 'MSGNUM', 'NEXT' ],
'NEXTPG' => [ 'PG', 'NEXT' ],
'NEXTPGLINK' => [ 'PGLINK', 'NEXT' ],
'NEXTSUBJECT' => [ 'SUBJECT', 'NEXT' ],
'PREVBUTTON' => [ 'BUTTON', 'PREV' ],
'PREVFROM' => [ 'FROM', 'PREV' ],
'PREVFROMADDR' => [ 'FROMADDR', 'PREV' ],
'PREVFROMNAME' => [ 'FROMNAME', 'PREV' ],
'PREVLINK' => [ 'LINK', 'PREV' ],
'PREVMSG' => [ 'MSG', 'PREV' ],
'PREVMSGNUM' => [ 'MSGNUM', 'PREV' ],
'PREVPGLINK' => [ 'PGLINK', 'PREV' ],
'PREVPG' => [ 'PG', 'PREV' ],
'PREVSUBJECT' => [ 'SUBJECT', 'PREV' ],
'TFIRSTPG' => [ 'PG', 'TFIRST' ],
'TLASTPG' => [ 'PG', 'TLAST' ],
'TNEXTBUTTON' => [ 'BUTTON', 'TNEXT' ],
'TNEXTFROM' => [ 'FROM', 'TNEXT' ],
'TNEXTFROMADDR' => [ 'FROMADDR', 'TNEXT' ],
'TNEXTFROMNAME' => [ 'FROMNAME', 'TNEXT' ],
'TNEXTLINK' => [ 'LINK', 'TNEXT' ],
'TNEXTMSG' => [ 'MSG', 'TNEXT' ],
'TNEXTMSGNUM' => [ 'MSGNUM', 'TNEXT' ],
'TNEXTPGLINK' => [ 'PGLINK', 'TNEXT' ],
'TNEXTPG' => [ 'PG', 'TNEXT' ],
'TNEXTSUBJECT' => [ 'SUBJECT', 'TNEXT' ],
'TPREVBUTTON' => [ 'BUTTON', 'TPREV' ],
'TPREVFROM' => [ 'FROM', 'TPREV' ],
'TPREVFROMADDR' => [ 'FROMADDR', 'TPREV' ],
'TPREVFROMNAME' => [ 'FROMNAME', 'TPREV' ],
'TPREVLINK' => [ 'LINK', 'TPREV' ],
'TPREVMSG' => [ 'MSG', 'TPREV' ],
'TPREVMSGNUM' => [ 'MSGNUM', 'TPREV' ],
'TPREVPGLINK' => [ 'PGLINK', 'TPREV' ],
'TPREVPG' => [ 'PG', 'TPREV' ],
'TPREVSUBJECT' => [ 'SUBJECT', 'TPREV' ],
);
##---------------------------------------------------------------------------
## replace_li_var() is used to substitute vars to current
## values. This routine relies on some variables being set by the
## calling routine or as globals.
##
sub replace_li_var {
my($val, $index) = ($_[0], $_[1]);
my($var,$len,$canclip,$raw,$isurl,$tmp,$ret) = ('',0,0,0,0,'','');
my($jstr) = (0);
my($expand) = (0);
my($n) = (0);
my($isfirst, $islast, $tisfirst, $tislast);
my($lref, $key, $pos);
my($arg, $opt) = ("", "");
## Get variable argument string
if ($val =~ s/\(([^()]*)\)//) {
$arg = $1;
}
## Get length specifier (if defined)
($var, $len) = split(/:/, $val, 2);
$len = -1 unless defined $len;
## Check for old resource variables and map to new
($var, $arg) = @{$old2new{$var}} if defined($old2new{$var});
## Check if variable in a URL string
$isurl = 1 if ($len =~ s/u//ig);
$jstr = 1 if ($len =~ s/j//ig);
## Set index related variables
if ($index ne '') {
if ($REVSORT) {
$isfirst = ($Index2MLoc{$index} == $#MListOrder);
$islast = ($Index2MLoc{$index} == 0);
} else {
$isfirst = ($Index2MLoc{$index} == 0);
$islast = ($Index2MLoc{$index} == $#MListOrder);
}
$tisfirst = ($Index2TLoc{$index} == 0);
$tislast = ($Index2TLoc{$index} == $#TListOrder);
}
## Do variable replacement
REPLACESW: {
## -------------------------------------- ##
## Message information resource variables ##
## -------------------------------------- ##
if ($var eq 'DATE') { ## Message "Date:"
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
$tmp = defined($key) ? $Date{$key} : "";
last REPLACESW;
}
if ($var eq 'DDMMYY' || $var eq 'DDMMYYYY' ||
$var eq 'MMDDYY' || $var eq 'MMDDYYYY' ||
$var eq 'YYMMDD' || $var eq 'YYYYMMDD') {
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
$tmp = defined($key) ?
&time2mmddyy((split(/$X/o, $key))[0], lc $var) :
"";
last REPLACESW;
}
my($cnd1, $cnd2, $cnd3) = (0,0,0);
if (($cnd1 = ($var eq 'FROM')) || ## Message "From:"
($cnd2 = ($var eq 'FROMADDR')) || ## Message from mail address
($cnd3 = ($var eq 'FROMNAME'))) { ## Message from name
my $esub = $cnd1 ? sub { $_[0]; } :
$cnd2 ? \&extract_email_address :
\&extract_email_name;
$canclip = 1; $raw = 1;
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
$tmp = defined($key) ? &$esub($From{$key}) : "(nil)";
last REPLACESW;
}
if ($var eq 'ICON') { ## Message icon
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
if (!defined($key)) { $tmp = ""; last REPLACESW; }
$tmp = $Icons{$ContentType{$key}} ?
join(qq|<IMG SRC="$Icons{$ContentType{$key}}" |,
qq|ALT="[$ContentType{$key}]">|) :
qq|<IMG SRC="$Icons{'unknown'}" ALT="[unknown]">|;
last REPLACESW;
}
if ($var eq 'ICONURL') { ## URL to message icon
$isurl = 0;
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
if ($Icons{$ContentType{$key}}) {
$tmp = $Icons{$ContentType{$key}};
} else {
$tmp = $Icons{'unknown'};
}
last REPLACESW;
}
if ($var eq 'MSG') { ## Filename of message page
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
$tmp = defined($key) ? &msgnum_filename($IndexNum{$key}) : "";
last REPLACESW;
}
if ($var eq 'MSGGMTDATE') { ## Message GMT date
($lref, $key, $pos, $opt) = compute_msg_pos($index, $var, $arg);
$tmp = &time2str($opt || $MsgGMTDateFmt,
&get_time_from_index($key), 0);
last REPLACESW;
}
if ($var eq 'MSGID') { ## Message-ID
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
$tmp = defined($key) ? $Index2MsgId{$index} : "";
last REPLACESW;
}
if ($var eq 'MSGLOCALDATE') { ## Message local date
($lref, $key, $pos, $opt) = compute_msg_pos($index, $var, $arg);
$tmp = &time2str($opt || $MsgLocalDateFmt,
&get_time_from_index($key), 1);
last REPLACESW;
}
if ($var eq 'MSGNUM') { ## Message number
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
$tmp = defined($key) ? &fmt_msgnum($IndexNum{$key}) : "";
last REPLACESW;
}
if ($var eq 'NOTE') { ## Annotation template markup
$expand = 1;
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
$tmp = note_exists($key) ? $NOTE : $NOTEIA;
last REPLACESW;
}
if ($var eq 'NOTEICON') { ## Annotation ICON (HTML markup)
$expand = 1;
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
$tmp = note_exists($key) ? $NOTEICON : $NOTEICONIA;
last REPLACESW;
}
if ($var eq 'NOTETEXT') { ## Annotation text
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
$tmp = get_note($key);
last REPLACESW;
}
if ($var eq 'NUMFOLUP') { ## Number of explicit follow-ups
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
$tmp = defined($key) ? $FolCnt{$key} : "";
last REPLACESW;
}
if ($var eq 'ORDNUM') { ## Sort order number of message
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
$tmp = defined($key) ? $pos+1 : -1;
last REPLACESW;
}
if ($var eq 'SUBJECT') { ## Message subject
$canclip = 1; $raw = 1; $isurl = 0;
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
$tmp = defined($key) ? $Subject{$key} : "";
last REPLACESW;
}
if ($var eq 'SUBJECTNA') { ## Message subject (not linked)
$canclip = 1; $raw = 1;
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
$tmp = defined($key) ? $Subject{$key} : "";
last REPLACESW;
}
## ------------------------------------- ##
## Message navigation resource variables ##
## ------------------------------------- ##
if ($var eq 'BUTTON') {
$expand = 1;
SW: {
if ($arg eq 'NEXT') {
$tmp = (!$islast) ? $NEXTBUTTON : $NEXTBUTTONIA;
last SW; }
if ($arg eq 'PREV') {
$tmp = (!$isfirst) ? $PREVBUTTON : $PREVBUTTONIA;
last SW; }
if ($arg eq 'TNEXT') {
$tmp = (!$tislast) ? $TNEXTBUTTON : $TNEXTBUTTONIA;
last SW; }
if ($arg eq 'TPREV') {
$tmp = (!$tisfirst) ? $TPREVBUTTON : $TPREVBUTTONIA;
last SW; }
}
last REPLACESW;
}
if ($var eq 'LINK') {
$expand = 1;
SW: {
if ($arg eq 'NEXT') {
$tmp = (!$islast) ? $NEXTLINK : $NEXTLINKIA;
last SW; }
if ($arg eq 'PREV') {
$tmp = (!$isfirst) ? $PREVLINK : $PREVLINKIA;
last SW; }
if ($arg eq 'TNEXT') {
$tmp = (!$tislast) ? $TNEXTLINK : $TNEXTLINKIA;
last SW; }
if ($arg eq 'TPREV') {
$tmp = (!$tisfirst) ? $TPREVLINK : $TPREVLINKIA;
last SW; }
}
last REPLACESW;
}
if ($var eq 'TSLICE') {
$tmp = &make_thread_slice($index, $TSliceNBefore, $TSliceNAfter)
if ($TSliceNBefore != 0 || $TSliceNAfter != 0);
last REPLACESW;
}
## -------------------------------- ##
## Index related resource variables ##
## -------------------------------- ##
if ($var eq 'A_ATTR') { ## Anchor attrs to link to message
$isurl = 0;
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
if (!defined($key)) { $tmp = ""; last REPLACESW; }
$tmp = qq/NAME="/ . &fmt_msgnum($IndexNum{$key}) .
qq/" HREF="/ .
&msgnum_filename($IndexNum{$key}) .
qq/"/;
last REPLACESW;
}
if ($var eq 'A_NAME') { ## Anchor name for message position
$isurl = 0;
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
if (!defined($key)) { $tmp = ""; last REPLACESW; }
$tmp = qq/NAME="/ . &fmt_msgnum($IndexNum{$key}) . qq/"/;
last REPLACESW;
}
if ($var eq 'A_HREF') { ## Anchor href to link to message
$isurl = 0;
($lref, $key, $pos) = compute_msg_pos($index, $var, $arg);
if (!defined($key)) { $tmp = ""; last REPLACESW; }
$tmp = qq/HREF="/ . &msgnum_filename($IndexNum{$key}) . qq/"/;
last REPLACESW;
}
if ($var eq 'IDXFNAME') { ## Filename of index page
if ($MULTIIDX && ($n = int($Index2MLoc{$index}/$IDXSIZE)+1) > 1) {
$tmp = sprintf("%s%d.$HtmlExt",
$IDXPREFIX, $index ne '' ? $n : 1);
} else {
$tmp = $IDXNAME;
}
$tmp .= ".gz" if $GzipLinks;
last REPLACESW;
}
if ($var eq 'IDXLABEL') { ## Label for main index
$tmp = $IDXLABEL;
last REPLACESW;
}
if ($var eq 'IDXSIZE') { ## Index page size
$tmp = $IDXSIZE;
last REPLACESW;
}
if ($var eq 'IDXTITLE') { ## Main index title
$canclip = 1; $expand = 1;
$tmp = $TITLE;
last REPLACESW;
}
if ($var eq 'NUMOFIDXMSG') { ## Number of item on the index page
$tmp = $PageSize;
last REPLACESW;
}
if ($var eq 'NUMOFMSG') { ## Total number of messages
$tmp = $NumOfMsgs;
last REPLACESW;
}
if ($var eq 'SORTTYPE') { ## Sort type of index
SORTTYPE: {
if ($NOSORT) { $tmp = 'Number'; last SORTTYPE; }
if ($AUTHSORT) { $tmp = 'Author'; last SORTTYPE; }
if ($SUBSORT) { $tmp = 'Subject'; last SORTTYPE; }
$tmp = 'Date';
last SORTTYPE;
}
last REPLACESW;
}
if ($var eq 'TIDXFNAME') {
if ($MULTIIDX && ($n = int($Index2TLoc{$index}/$IDXSIZE)+1) > 1) {
$tmp = sprintf("%s%d.$HtmlExt",
$TIDXPREFIX, $index ne '' ? $n : 1);
} else {
$tmp = $TIDXNAME;
}
$tmp .= ".gz" if $GzipLinks;
last REPLACESW;
}
if ($var eq 'TIDXLABEL') {
$tmp = $TIDXLABEL;
last REPLACESW;
}
if ($var eq 'TIDXTITLE') {
$canclip = 1; $expand = 1;
$tmp = $TTITLE;
last REPLACESW;
}
if ($var eq 'TSORTTYPE') {
TSORTTYPE: {
if ($TNOSORT) { $tmp = 'Number'; last TSORTTYPE; }
if ($TSUBSORT) { $tmp = 'Subject'; last TSORTTYPE; }
$tmp = 'Date';
last TSORTTYPE;
}
last REPLACESW;
}
if ($var eq 'PGLINK') {
$expand = 1;
SW: {
if ($arg eq 'NEXT') {
$tmp = $PageNum < $NumOfPages ?
$NEXTPGLINK : $NEXTPGLINKIA;
last SW; }
if ($arg eq 'PREV') {
$tmp = $PageNum > 1 ? $PREVPGLINK : $PREVPGLINKIA;
last SW; }
if ($arg eq 'TNEXT') {
$tmp = $PageNum < $NumOfPages ?
$TNEXTPGLINK : $TNEXTPGLINKIA;
last SW; }
if ($arg eq 'TPREV') {
$tmp = $PageNum > 1 ? $TPREVPGLINK : $TPREVPGLINKIA;
last SW; }
}
last REPLACESW;
}
if ($var eq 'PAGENUM') {
$tmp = $PageNum;
last REPLACESW;
}
if ($var eq 'NUMOFPAGES') {
$tmp = $NumOfPages;
last REPLACESW;
}
if ($var eq 'PG') {
my $num = $PageNum;
my $t = ($arg =~ s/^T//);
my $prefix = $t ? $TIDXPREFIX : $IDXPREFIX;
SW: {
if ($arg eq 'NEXT') { $num = $PageNum+1; last SW; }
if ($arg eq 'PREV') { $num = $PageNum-1; last SW; }
if ($arg eq 'FIRST') { $num = 0; last SW; }
if ($arg eq 'LAST') { $num = $NumOfPages; last SW; }
if ($arg =~ /^-?\d+$/) { $num = $PageNum+$arg; last SW; }
}
if ($num < 2) {
$tmp = $t ? $TIDXNAME : $IDXNAME;
} else {
$num = $NumOfPages if $num > $NumOfPages;
$tmp = sprintf("%s%d.$HtmlExt", $prefix, $num);
}
$tmp .= ".gz" if $GzipLinks;
last REPLACESW;
}
## -------------------------------- ##
## Miscellaneous resource variables ##
## -------------------------------- ##
if ($var eq 'DOCURL') {
$isurl = 0;
$tmp = $DOCURL;
last REPLACESW;
}
if ($var eq 'GMTDATE') {
$tmp = &time2str($arg || $GMTDateFmt, time, 0);
last REPLACESW;
}
if ($var eq 'IDXPREFIX') {
$tmp = $IDXPREFIX;
last REPLACESW;
}
if ($var eq 'LOCALDATE') {
$tmp = &time2str($arg || $LocalDateFmt, time, 1);
last REPLACESW;
}
if ($var eq 'MSGPREFIX') {
$tmp = $MsgPrefix;
last REPLACESW;
}
if ($var eq 'OUTDIR') {
$tmp = $OUTDIR;
last REPLACESW;
}
if ($var eq 'PROG') {
$tmp = $PROG;
last REPLACESW;
}
if ($var eq 'TIDXPREFIX') {
$tmp = $TIDXPREFIX;
last REPLACESW;
}
if ($var eq 'VERSION') {
$tmp = $VERSION;
last REPLACESW;
}
if ($var eq '') {
$tmp = '$';
last REPLACESW;
}
## --------------------------- ##
## User defined variable check ##
## --------------------------- ##
if (defined($CustomRcVars{$var})) {
$expand = 1;
$tmp = $CustomRcVars{$var};
last REPLACESW;
}
warn qq/Warning: Unrecognized variable: "$val"\n/;
return "\$$val\$";
}
## Check if string needs to be expanded again
if ($expand) {
$tmp =~ s/\$([^\$]*)\$/&replace_li_var($1,$index)/ge;
}
## Check if URL text specifier is set
if ($isurl) {
$ret = &urlize($tmp);
} else {
if ($raw) {
$ret = &$MHeadCnvFunc($tmp);
} else {
$ret = $tmp;
}
# Check for clipping
if ($len > 0 && $canclip) {
# Check for entity refs and modify clip length accordingly
foreach ($ret =~ /(\&[^;\s]*;)/g) {
$len += length($_) -1;
}
$ret = substr($ret, 0, $len);
}
# Check if JavaScript string
$ret =~ s/(["'])/\\$1/g if $jstr;
}
## Check for subject link
$ret = qq|<A NAME="| .
&fmt_msgnum($IndexNum{$index}) .
qq|" HREF="| .
&msgnum_filename($IndexNum{$index}) .
qq|">$ret</A>|
if $var eq 'SUBJECT' && $arg eq "";
$ret;
}
##---------------------------------------------------------------------------##
## compute_msg_pos(): Get message location data.
##
sub compute_msg_pos {
my($idx, $var, $arg) = @_;
my($ofs, $pos, $aref, $href, $key);
my $opt = undef;
my $flip = 0;
## Determine what list type
if ($arg =~ s/^T//) {
$aref = \(_at_)TListOrder;
$href = \%Index2TLoc;
} else {
$aref = \(_at_)MListOrder;
$href = \%Index2MLoc;
$flip = $REVSORT;
}
## Extract out optional data
($arg, $opt) = split(/;/, $arg);
SW: {
$ofs = 0, last SW
if $arg eq "" or $arg eq 'CUR';
$ofs = ($flip ? 1 : -1), last SW
if $arg eq 'PREV';
$ofs = ($flip ? -1 : 1), last SW
if $arg eq 'NEXT';
$ofs = ($flip ? $aref->[$#$aref] : $aref->[0]), last SW
if $arg eq 'FIRST';
$ofs = ($flip ? $aref->[$#$aref] : $aref->[0]), last SW
if $arg eq 'LAST';
$ofs = ($flip ? -$arg : $arg), last SW
if $arg =~ /^-?\d+$/;
if ($arg eq 'PARENT') {
my $level = $ThreadLevel{$idx};
$pos = $Index2TLoc{$idx};
for ( ; $pos >= 0; --$pos) {
last if $ThreadLevel{$TListOrder[$pos]} < $level;
}
undef $ofs;
last SW;
}
warn qq/Warning: $var: Unrecognized variable argument: "$arg"\n/;
$ofs = 0;
}
$pos = $href->{$idx} + $ofs if defined($ofs);
if (($pos > $#$aref) || ($pos < 0)) {
$pos = -1;
$key = undef;
} else {
$key = $aref->[$pos];
}
($aref, $key, $pos, $opt);
}
##---------------------------------------------------------------------------##
1;
----
Earl Hood | University of California: Irvine
ehood(_at_)medusa(_dot_)acs(_dot_)uci(_dot_)edu | Electronic
Loiterer
http://www.oac.uci.edu/indiv/ehood/ | Dabbler of SGML/WWW/Perl/MIME
