===================================================================
RCS file: /cvs/cvsweb/cvsweb.cgi,v
retrieving revision 3.23
retrieving revision 3.25
diff -u -p -r3.23 -r3.25
--- cvsweb/cvsweb.cgi	2000/09/19 19:57:58	3.23
+++ cvsweb/cvsweb.cgi	2000/09/21 15:30:04	3.25
@@ -42,8 +42,8 @@
 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 # SUCH DAMAGE.
 #
-# $zId: cvsweb.cgi,v 1.101 2000/09/13 22:44:05 jumager Exp $
-# $Id: cvsweb.cgi,v 3.23 2000/09/19 19:57:58 knu Exp $
+# $zId: cvsweb.cgi,v 1.103 2000/09/20 17:02:29 jumager Exp $
+# $Id: cvsweb.cgi,v 3.25 2000/09/21 15:30:04 knu Exp $
 #
 ###
 
@@ -90,6 +90,8 @@ sub fatal($$);
 sub redirect($);
 sub safeglob($);
 sub getMimeTypeFromSuffix($);
+sub head($;$);
+sub scan_directives(@);
 sub doAnnotate($$);
 sub doCheckout($$);
 sub cvswebMarkup($$$);
@@ -154,7 +156,7 @@ $allow_markup = $use_java_script = $open_extern_window
 $extern_window_width = $extern_window_height = $edit_option_form =
 $checkout_magic = $show_subdir_lastmod = $show_log_in_markup = $v =
 $navigationHeaderColor = $tableBorderColor = $markupLogColor =
-$tabstop = $use_moddate = $moddate = undef;
+$tabstop = $use_moddate = $moddate = $gzip_open = undef;
 
 ##### End of configuration variables #####
 
@@ -207,7 +209,8 @@ $nofilelinks = $is_textbased;
 # display garbage then :-/
 # Turn off gzip if running under mod_perl and no zlib is available,
 # piping does not work as expected inside the server.
-$maycompress = (($ENV{HTTP_ACCEPT_ENCODING} =~ m`gzip`
+$maycompress = (((defined($ENV{HTTP_ACCEPT_ENCODING})
+		 && $ENV{HTTP_ACCEPT_ENCODING} =~ m`gzip`)
 		 || $is_mozilla3)
 		&& !$is_msie
 		&& !($is_mod_perl && !$has_zlib));
@@ -780,18 +783,18 @@ elsif (-d $fullname) {
     elsif (-f $fullname . ',v') {
 	if (defined($input{'rev'}) || $doCheckout) {
 	    &doCheckout($fullname, $input{'rev'});
-	    close(GZIP) if ($gzip_open);
+	    gzipclose();
 	    exit;
 	}
 	if (defined($input{'annotate'}) && $allow_annotate) {
 	    &doAnnotate($input{'annotate'});
-	    close(GZIP) if ($gzip_open);
+	    gzipclose();
 	    exit;
 	}
 	if (defined($input{'r1'}) && defined($input{'r2'})) {
 	    &doDiff($fullname, $input{'r1'}, $input{'tr1'},
 		    $input{'r2'}, $input{'tr2'}, $input{'f'});
-	    close(GZIP) if ($gzip_open);
+	    gzipclose();
 	    exit;
 	}
 	print("going to dolog($fullname)\n") if ($verbose);
@@ -814,7 +817,7 @@ elsif (-d $fullname) {
 	# e.g. foo.c
 	&doDiff($fullname, $input{'r1'}, $input{'tr1'},
 		$input{'r2'}, $input{'tr2'}, $input{'f'});
-	close(GZIP) if ($gzip_open);
+	gzipclose();
 	exit;
     }
     elsif (($newname = $fullname) =~ s|/([^/]+)$|/Attic/$1| &&
@@ -849,7 +852,7 @@ elsif (-d $fullname) {
 	&fatal("404 Not Found","$where: no such file or directory");
     }
 
-close(GZIP) if ($gzip_open);
+gzipclose();
 ## End MAIN
 
 sub printDiffSelect($) {
@@ -1075,6 +1078,40 @@ sub getMimeTypeFromSuffix($) {
 }
 
 ###############################
+# read first lines like head(1)
+###############################
+sub head($;$) {
+    my $fh = $_[0];
+    my $linecount = $_[1] || 10;
+
+    my @buf;
+
+    if ($linecount > 0) {
+	my $i;
+	for ($i = 0; !eof($fh) && $i < $linecount; $i++) {
+	    push @buf, scalar <$fh>;
+	}
+    } else {
+	@buf = <$fh>;
+    }
+
+    @buf;
+}
+
+###############################
+# scan vim and Emacs directives
+###############################
+sub scan_directives(@) {
+    my $ts = undef;
+
+    for (@_) {
+	$ts = $1 if /\b(?:ts|tabstop|tab-width)[:=]\s*([1-9]\d*)\b/;
+    }
+
+    ('tabstop' => $ts);
+}
+
+###############################
 # show Annotation
 ###############################
 sub doAnnotate($$) {
@@ -1175,7 +1212,15 @@ sub doAnnotate($$) {
     else {
 	print "<pre>";
     }
-    while (<$reader>) {
+
+    # prefetch several lines
+    my @buf = head($reader);
+
+    my %d = scan_directives(@buf);
+
+    while (@buf || !eof($reader)) {
+	$_ = @buf ? shift @buf : <$reader>;
+
 	my @words = split;
 	# Adding one is for the (single) space which follows $words[0].
 	my $rest = substr ($_, length ($words[0]) + 1);
@@ -1209,7 +1254,7 @@ sub doAnnotate($$) {
 
 	    print "<b>" if ($isCurrentRev);
 	    printf ("%8s%s%8s %4d:", $revprint, ($isCurrentRev ? "|" : " "), $usrprint, $lineNr);
-	    print spacedHtmlText($line);
+	    print spacedHtmlText($line, $d{'tabstop'});
 	    print "</b>" if ($isCurrentRev);
 	}
 	elsif ($words[0] eq "ok") {
@@ -1352,7 +1397,6 @@ sub cvswebMarkup($$$) {
 	    $input{only_with_tag};
     }
     print "</td></tr></table>";
-    my @content = <$filehandle>;
     my $url = download_url($fileurl, $revision, $mimetype);
     print "<HR noshade>";
     if ($mimetype =~ /^image/) {
@@ -1363,8 +1407,16 @@ sub cvswebMarkup($$$) {
     }
     else {
 	print "<PRE>";
-	foreach (@content) {
-	    print spacedHtmlText($_);
+
+	# prefetch several lines
+	my @buf = head($filehandle);
+
+	my %d = scan_directives(@buf);
+
+	while (@buf || !eof($filehandle)) {
+	    $_ = @buf ? shift @buf : <$filehandle>;
+
+	    print spacedHtmlText($_, $d{'tabstop'});
 	}
 	print "</PRE>";
     }
@@ -1471,7 +1523,7 @@ sub doDiff($$$$$$) {
 	if ($human_readable) {
 	    http_header();
 	    &human_readable_diff($fh, $rev2);
-	    close(GZIP) if ($gzip_open);
+	    gzipclose();
 	    exit;
 	}
 	else {
@@ -2254,7 +2306,7 @@ sub flush_diff_rows($$$$) {
 # human_readable_diff(String revision_to_return_to);
 ##
 sub human_readable_diff($){
-  my ($i,$difftxt, $where_nd, $filename, $pathname, $scriptwhere_nd);
+  my ($difftxt, $where_nd, $filename, $pathname, $scriptwhere_nd);
   my ($fh, $rev) = @_;
   my ($date1, $date2, $r1d, $r2d, $r1r, $r2r, $rev1, $rev2, $sym1, $sym2);
   my (@rightCol, @leftCol);
@@ -2308,9 +2360,15 @@ sub human_readable_diff($){
   # cascading style sheets because we've to set the
   # font and color for each row. anyone ...?
   ####
-  while (<$fh>) {
-      $difftxt = $_;
 
+  # prefetch several lines
+  my @buf = head($fh);
+
+  my %d = scan_directives(@buf);
+
+  while (@buf || !eof($fh)) {
+      $difftxt = @buf ? shift @buf : <$fh>;
+
       if ($difftxt =~ /^@@/) {
 	  ($oldline,$newline,$funname) = $difftxt =~ /@@ \-([0-9]+).*\+([0-9]+).*@@(.*)/;
           print  "<tr bgcolor=\"$diffcolorHeading\"><td width=\"50%\">";
@@ -2326,7 +2384,7 @@ sub human_readable_diff($){
       }
       else {
 	  ($diffcode,$rest) = $difftxt =~ /^([-+ ])(.*)/;
-	  $_ = spacedHtmlText ($rest);
+	  $_ = spacedHtmlText($rest, $d{'tabstop'});
 
 	  # Add fontface, size
 	  $_ = "$fs&nbsp;$_$fe";
@@ -2410,7 +2468,7 @@ sub navigateHeader($$$$$) {
     $swhere = urlencode($filename) if ($swhere eq "");
     print "<\!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">";
     print "<HTML>\n<HEAD>\n";
-    print '<!-- CVSweb $zRevision: 1.101 $  $Revision: 3.23 $ -->';
+    print '<!-- CVSweb $zRevision: 1.103 $  $Revision: 3.25 $ -->';
     print "\n<TITLE>$path$filename - $title - $rev</TITLE></HEAD>\n";
     print  "<BODY BGCOLOR=\"$backcolor\">\n";
     print "<table width=\"100%\" border=0 cellspacing=0 cellpadding=1 bgcolor=\"$navigationHeaderColor\">";
@@ -2765,7 +2823,7 @@ sub http_header(;$) {
 
 sub html_header($) {
     my ($title) = @_;
-    my $version = '$zRevision: 1.101 $  $Revision: 3.23 $'; #'
+    my $version = '$zRevision: 1.103 $  $Revision: 3.25 $'; #'
     http_header();
     print <<EOH;
 <!doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN"
@@ -2810,6 +2868,17 @@ sub forbidden_module($) {
     }
 
     return 0;
+}
+
+# Close the GZIP handle remove the tie.
+
+sub gzipclose {
+	if ($gzip_open) {
+	    select(STDOUT);
+	    close(GZIP);
+	    untie *GZIP;
+	    $gzip_open = 0;
+	}
 }
 
 # implement a gzipped file handle via the Compress:Zlib compression