Polishing of how the side-by-side diff looks.

Aligned all different files, so that all side-by-side tables look
the same. Also made sure that the tables take up the whole browser
width.

Also various changes to the css to make things easier on the eye.

Signed-off-by: Ragnar Ouchterlony <ragnar@lysator.liu.se>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>

cgit.css

@@ -602,37 +602,91 @@ table.hgraph div.bar {
 	height: 1em;
 }
 
+table.ssdiff {
+	width: 100%;
+}
+
+table.ssdiff td {
+	font-size: 75%;
+	font-family: monospace;
+	white-space: pre;
+	padding: 1px 4px 1px 4px;
+	border-left: solid 1px #aaa;
+	border-right: solid 1px #aaa;
+}
+
 table.ssdiff td.add {
 	color: black;
-	background: #afa;
+	background: #cfc;
+	min-width: 50%;
 }
 
 table.ssdiff td.add_dark {
 	color: black;
-	background: #9c9;
+	background: #aca;
+	min-width: 50%;
 }
 
 table.ssdiff td.del {
 	color: black;
-	background: #faa;
+	background: #fcc;
+	min-width: 50%;
 }
 
 table.ssdiff td.del_dark {
 	color: black;
-	background: #c99;
+	background: #caa;
+	min-width: 50%;
 }
 
 table.ssdiff td.changed {
 	color: black;
-	background: #ffa;
+	background: #ffc;
+	min-width: 50%;
 }
 
 table.ssdiff td.changed_dark {
 	color: black;
-	background: #cc9;
+	background: #cca;
+	min-width: 50%;
+}
+
+table.ssdiff td.lineno {
+	color: black;
+	background: #eee;
+	text-align: right;
+	width: 3em;
+	min-width: 3em;
 }
 
 table.ssdiff td.hunk {
 	color: #black;
 	background: #ccf;
+	border-top: solid 1px #aaa;
+	border-bottom: solid 1px #aaa;
+}
+
+table.ssdiff td.head {
+	border-top: solid 1px #aaa;
+	border-bottom: solid 1px #aaa;
+}
+
+table.ssdiff td.head div.head {
+	font-weight: bold;
+	color: black;
+}
+
+table.ssdiff td.foot {
+	border-top: solid 1px #aaa;
+        border-left: none;
+        border-right: none;
+        border-bottom: none;
+}
+
+table.ssdiff td.space {
+	border: none;
+}
+
+table.ssdiff td.space div {
+	min-height: 3em;
 }

ui-diff.c

@@ -246,8 +246,6 @@ static void header(unsigned char *sha1, char *path1, int mode1,
 			html_txt(path2);
 	}
 	html("</div>");
-	if (use_ssdiff)
-		cgit_ssdiff_header();
 }
 
 static void print_ssdiff_link()
@@ -270,24 +268,26 @@ static void filepair_cb(struct diff_filepair *pair)
 	int binary = 0;
 	linediff_fn print_line_fn = print_line;
 
-	header(pair->one->sha1, pair->one->path, pair->one->mode,
-	       pair->two->sha1, pair->two->path, pair->two->mode);
 	if (use_ssdiff) {
-		cgit_ssdiff_header();
+		cgit_ssdiff_header_begin();
 		print_line_fn = cgit_ssdiff_line_cb;
 	}
+	header(pair->one->sha1, pair->one->path, pair->one->mode,
+	       pair->two->sha1, pair->two->path, pair->two->mode);
+	if (use_ssdiff)
+		cgit_ssdiff_header_end();
 	if (S_ISGITLINK(pair->one->mode) || S_ISGITLINK(pair->two->mode)) {
 		if (S_ISGITLINK(pair->one->mode))
-			print_line(fmt("-Subproject %s", sha1_to_hex(pair->one->sha1)), 52);
+			print_line_fn(fmt("-Subproject %s", sha1_to_hex(pair->one->sha1)), 52);
 		if (S_ISGITLINK(pair->two->mode))
-			print_line(fmt("+Subproject %s", sha1_to_hex(pair->two->sha1)), 52);
+			print_line_fn(fmt("+Subproject %s", sha1_to_hex(pair->two->sha1)), 52);
 		return;
 	}
 	if (cgit_diff_files(pair->one->sha1, pair->two->sha1, &old_size,
 			    &new_size, &binary, print_line_fn))
 		cgit_print_error("Error running diff");
 	if (binary)
-		html("Binary files differ");
+		print_line_fn(" Binary files differ", 20);
 	if (use_ssdiff)
 		cgit_ssdiff_footer();
 }
@@ -334,9 +334,14 @@ void cgit_print_diff(const char *new_rev, const char *old_rev, const char *prefi
 	print_ssdiff_link();
 	cgit_print_diffstat(old_rev_sha1, new_rev_sha1);
 
+	if (use_ssdiff) {
+		html("<table summary='ssdiff' class='ssdiff'>");
+	} else {
 		html("<table summary='diff' class='diff'>");
 		html("<tr><td>");
+	}
 	cgit_diff_tree(old_rev_sha1, new_rev_sha1, filepair_cb, prefix);
+	if (!use_ssdiff)
 		html("</td></tr>");
 	html("</table>");
 }

ui-ssdiff.c

@@ -106,10 +106,10 @@ static void print_ssdiff_line(char *class, int old_line_no, char *old_line,
 {
 	html("<tr>");
 	if (old_line_no > 0)
-		htmlf("<td class='%s'>%d </td><td class='%s'>", class,
+		htmlf("<td class='lineno'>%d</td><td class='%s'>",
 		      old_line_no, class);
 	else
-		htmlf("<td class='%s_dark'>  </td><td class='%s_dark'>", class, class);
+		htmlf("<td class='lineno'></td><td class='%s_dark'>", class);
 
 	if (old_line) {
 		old_line = replace_tabs(old_line + 1);
@@ -120,10 +120,10 @@ static void print_ssdiff_line(char *class, int old_line_no, char *old_line,
 	html("</td>");
 
 	if (new_line_no > 0)
-		htmlf("<td class='%s'>  %d </td><td class='%s'>", class,
+		htmlf("<td class='lineno'>%d</td><td class='%s'>",
 		      new_line_no, class);
 	else
-		htmlf("<td class='%s_dark'>  </td><td class='%s_dark'>", class, class);
+		htmlf("<td class='lineno'></td><td class='%s_dark'>", class);
 
 	if (new_line) {
 		new_line = replace_tabs(new_line + 1);
@@ -249,16 +249,22 @@ void cgit_ssdiff_line_cb(char *line, int len)
 	line[len - 1] = c;
 }
 
-void cgit_ssdiff_header()
+void cgit_ssdiff_header_begin()
 {
 	current_old_line = 0;
 	current_new_line = 0;
-	html("<table class='ssdiff'>");
+	html("<tr><td class='space' colspan='4'><div></div></td></tr>");
+	html("<tr><td class='head' colspan='4'>");
+}
+
+void cgit_ssdiff_header_end()
+{
+	html("</td><tr>");
 }
 
 void cgit_ssdiff_footer()
 {
 	if (deferred_old || deferred_new)
 		cgit_ssdiff_print_deferred_lines();
-	html("</table>");
+	html("<tr><td class='foot' colspan='4'></td></tr>");
 }

ui-ssdiff.h

@@ -5,7 +5,8 @@ extern void cgit_ssdiff_print_deferred_lines();
 
 extern void cgit_ssdiff_line_cb(char *line, int len);
 
-extern void cgit_ssdiff_header();
+extern void cgit_ssdiff_header_begin();
+extern void cgit_ssdiff_header_end();
 
 extern void cgit_ssdiff_footer();