[PATCH] gitweb: support for "fp" parameter.

The "fp" (file name parent) parameter was previously generated for
blob diffs of renamed files.  However, it was not used in any code.

Now href() can generate "fp" parameters and they are used by the
blobdiff code to show the correct file name.

Signed-off-by: Martin Waitz <tali@admingilde.org>
---
 gitweb/gitweb.perl |   16 +++++++++++-----
 1 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index ed6bd0e..a022569 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -124,6 +124,13 @@ if (defined $file_name) {
 	}
 }
 
+our $file_parent = $cgi->param('fp');
+if (defined $file_parent) {
+	if (!validate_input($file_parent)) {
+		die_error(undef, "Invalid file parent parameter");
+	}
+}
+
 our $hash = $cgi->param('h');
 if (defined $hash) {
 	if (!validate_input($hash)) {
@@ -197,6 +204,7 @@ sub href(%) {
 		action => "a",
 		project => "p",
 		file_name => "f",
+		file_parent => "fp",
 		hash => "h",
 		hash_parent => "hp",
 		hash_base => "hb",
@@ -1282,8 +1290,7 @@ sub git_difftree_body {
 			      $cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$to_file)}, "blob");
 			if ($to_id ne $from_id) {
 				print " | " .
-				      $cgi->a({-href => "$my_uri?" .
-				              esc_param("p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$to_file;fp=$from_file")}, "diff");
+				      $cgi->a({-href => href(action=>"blobdiff", hash=>$to_id, hash_parent=>$from_id, hash_base=>$hash, file_name=>$to_file, file_parent=>$from_file)}, "diff");
 			}
 			print "</td>\n";
 
@@ -1304,8 +1311,7 @@ sub git_difftree_body {
 			      $cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$to_file)}, "blob");
 			if ($to_id ne $from_id) {
 				print " | " .
-				      $cgi->a({-href => "$my_uri?" .
-				              esc_param("p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$to_file;fp=$from_file")}, "diff");
+				      $cgi->a({-href => href(action=>"blobdiff", hash=>$to_id, hash_parent=>$from_id, hash_base=>$hash, file_name=>$to_file, file_parent=>$from_file)}, "diff");
 			}
 			print "</td>\n";
 		} # we should not encounter Unmerged (U) or Unknown (X) status
@@ -2290,7 +2296,7 @@ sub git_blobdiff {
 	git_print_page_path($file_name, "blob");
 	print "<div class=\"page_body\">\n" .
 	      "<div class=\"diff_info\">blob:" .
-	      $cgi->a({-href => href(action=>"blob", hash=>$hash_parent, hash_base=>$hash_base, file_name=>$file_name)}, $hash_parent) .
+	      $cgi->a({-href => href(action=>"blob", hash=>$hash_parent, hash_base=>$hash_base, file_name=>($file_parent || $file_name))}, $hash_parent) .
 	      " -> blob:" .
 	      $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)}, $hash) .
 	      "</div>\n";
-- 
1.4.2.rc2.gf055

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