[PATCH 2/3] gitweb: Extra columns in blame

[Petr Baudis <pasky@suse.cz>]

This patch adds extra columns to blame output, containing
line author and creation date. These columns are by default hidden by
display: none but by clicking on the expansion "button" you can display
them (and hide again). I think seeing this information without tooltips
fishing can give much better overview of the content evolution.

This patch depends on the interactive blame patch (but can be factored out;
the common required parts are just the blame.js infrastructure).

Signed-off-by: Petr Baudis <pasky@suse.cz>

---

This version is updated for the new version of incremental blame and
features updated javascript code based on a friend's suggestions that
should improve MSIE compatibility and performance.
---

 gitweb/blame.js    |   48 +++++++++++++++++++++++++++++++++++++++++++++++-
 gitweb/gitweb.css  |    5 +++++
 gitweb/gitweb.perl |   17 +++++++++++++----
 3 files changed, 65 insertions(+), 5 deletions(-)

diff --git a/gitweb/blame.js b/gitweb/blame.js
index bd51275..f6d661a 100644
--- a/gitweb/blame.js
+++ b/gitweb/blame.js
@@ -1,4 +1,44 @@
 // Copyright (C) 2007, Fredrik Kuivinen <frekui@gmail.com>
+// Copyright (C) 2007, Petr Baudis <pasky@suse.cz>
+
+
+// blame extra columns
+
+// I would like to note here that JavaScript is utterly stupid.
+function findStyleRule(styleName) {
+	for (i = 0; i < document.styleSheets.length; i++) { 
+		// MSIE has .rules, Mozilla has .cssRules
+		var cssRules = document.styleSheets[i].cssRules ? document.styleSheets[i].cssRules : document.styleSheets[i].rules;
+		for (j = 0; j < cssRules.length; j++) {
+			var rule = cssRules[j];
+			if (rule.selectorText.toLowerCase() == styleName) {
+				return rule;
+			}
+		}
+	}
+}
+
+var isIE = (navigator.appName.toLowerCase().indexOf("microsoft") != -1);
+var extra_columns = 0;
+var extra_column_rule = null;
+function extra_blame_columns() {
+	if (!extra_column_rule)
+		extra_column_rule = findStyleRule(".extra_column");
+
+	if (!extra_columns) {
+		document.getElementById("columns_expander").innerHTML = "[-]";
+		extra_column_rule.style.display = isIE ? "inline" : "table-cell";
+		extra_columns = 1;
+	} else {
+		document.getElementById("columns_expander").innerHTML = "[+]";
+		extra_column_rule.style.display = "none";
+		extra_columns = 0;
+	}
+}
+
+
+// blame_interactive
+
 
 var DEBUG = 0;
 function debug(str)
@@ -72,14 +112,20 @@ function handleLine(commit)
 			+ zeroPad(date.getUTCSeconds());
 		tr.firstChild.title = commit.author + ', ' + dateStr + ' ' + timeStr;
 		var shaAnchor = tr.firstChild.firstChild;
+		var authorField = tr.firstChild.nextSibling;
+		var dateField = tr.firstChild.nextSibling.nextSibling;
 		if (i == 0) {
 			shaAnchor.href = baseUrl + ';a=commit;h=' + commit.sha1;
 			shaAnchor.innerHTML = commit.sha1.substr(0, 8);
+			authorField.innerHTML = commit.author;
+			dateField.innerHTML = dateStr + ' ' + timeStr;
 		} else {
 			shaAnchor.innerHTML = '';
+			authorField.innerHTML = '';
+			dateField.innerHTML = '';
 		}
 
-		var lineAnchor = tr.firstChild.nextSibling.firstChild;
+		var lineAnchor = tr.firstChild.nextSibling.nextSibling.nextSibling.firstChild;
 		lineAnchor.href = baseUrl + ';a=blame;hb=' + commit.sha1
 			+ ';f=' + commit.filename + '#l' + commit.srcline;
 		resline++;
diff --git a/gitweb/gitweb.css b/gitweb/gitweb.css
index 9f0822f..48b50b0 100644
--- a/gitweb/gitweb.css
+++ b/gitweb/gitweb.css
@@ -488,3 +488,8 @@ span.match {
 div.binary {
 	font-style: italic;
 }
+
+/* This selector is hardcoded in gitweb.perl */
+.extra_column {
+	display: none;
+}
diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index dae35de..f301718 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -3677,11 +3677,16 @@ sub git_blame_common {
 	my $num_colors = scalar(@rev_color);
 	my $current_color = 0;
 	my $last_rev;
-	print "<script type=\"text/javascript\" src=\"$blamejs\"></script>\n" if $type eq 'incremental';
+	print "<script type=\"text/javascript\" src=\"$blamejs\"></script>\n";
 	print <<HTML;
+
 <div class="page_body">
 <table class="blame">
-<tr><th>Commit</th><th>Line</th><th>Data</th></tr>
+<tr><th>Commit&nbsp;<a href="javascript:extra_blame_columns()" id="columns_expander">[+]</a></th>
+<th class="extra_column">Author</th>
+<th class="extra_column">Date</th>
+<th>Line</th>
+<th>Data</th></tr>
 HTML
 	my %metainfo = ();
 	my $linenr = 0;
@@ -3692,6 +3697,8 @@ HTML
 			$linenr += 1;
 			print "<tr id=\"l$linenr\" class=\"light2\">";
 			print '<td class="sha1"><a href=""></a></td>';
+			print "<td class=\"extra_column\"></td>";
+			print "<td class=\"extra_column\"></td>";
 			print "<td class=\"linenr\"><a class=\"linenr\" href=\"\">$linenr</a></td><td class=\"pre\">" . esc_html($_) . "</td>\n";
 			print "</tr>\n";
 			next;
@@ -3721,15 +3728,17 @@ HTML
 		}
 		print "<tr class=\"$rev_color[$current_color]\">\n";
 		if ($group_size) {
+			my $rowspan = $group_size > 1 ? " rowspan=\"$group_size\"" : "";
 			print "<td class=\"sha1\"";
 			print " title=\"". esc_html($author) . ", $date\"";
-			print " rowspan=\"$group_size\"" if ($group_size > 1);
-			print ">";
+			print "$rowspan>";
 			print $cgi->a({-href => href(action=>"commit",
 			                             hash=>$full_rev,
 			                             file_name=>$file_name)},
 			              esc_html($rev));
 			print "</td>\n";
+			print "<td class=\"extra_column\" $rowspan>". esc_html($author) . "</td>";
+			print "<td class=\"extra_column\" $rowspan>". $date . "</td>";
 		}
 		open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
 			or die_error(undef, "Open git-rev-parse failed");