Use tables and css to create the diffstat graph, fix scaling

There was no need to use image-files for the graphs, so lets drop them.
At the same time, fix scaling of the graphs so that the full width is
used only if atleast 100 LOC are changed in one of the files.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

5 files changed, 27 insertions, 15 deletions

diff --git a/Makefile b/Makefile
index 96d68cb..aa7146d 100644
--- a/Makefile
+++ b/Makefile
@@ -51,25 +51,24 @@ $(OBJECTS): cgit.h git/libgit.a
 
 git/libgit.a:
 	$(INITGIT)
 	$(MAKE) -C git
 
 #
 # phony targets
 #
 install: all clean-cache
 	mkdir -p $(prefix)
 	install cgit $(prefix)/$(CGIT_SCRIPT_NAME)
 	install cgit.css $(prefix)/cgit.css
-	install add.png del.png $(prefix)/
 
 clean-cgit:
 	rm -f cgit *.o
 
 distclean-cgit: clean-cgit
 	git clean -d -x
 
 clean-sub:
 	$(MAKE) -C git clean
 
 distclean-sub: clean-sub
 	$(shell cd git && git clean -d -x)
diff --git a/add.png b/add.png
deleted file mode 100644
index c550388..0000000
--- a/add.png
+++ b/dev/null
diff --git a/cgit.css b/cgit.css
index 53c93f2..87fd00a 100644
--- a/cgit.css
+++ b/cgit.css
@@ -275,27 +275,44 @@ table.diffstat td.del a {
 	color: red;
 }
 
 table.diffstat td.upd a {
 	color: blue;
 }
 
 table.diffstat td.graph {
 	width: 75%;
 	vertical-align: center;
 }
 
-table.diffstat td.graph img {
+table.diffstat td.graph table {
 	border: none;
-	height: 8pt;
+}
+
+table.diffstat td.graph td {
+	padding: 0px;
+	border: 0px;
+	height: 7pt;
+}
+
+table.diffstat td.graph td.add {
+	background-color: #5c5;
+}
+
+table.diffstat td.graph td.rem {
+	background-color: #c55;
+}
+
+table.diffstat td.graph td.none {
+	background-color: none;
 }
 
 div.diffstat-summary {
 	color: #888;
 	padding-top: 0.5em;
 }
 
 table.diff td {
 	font-family: monospace;
 	white-space: pre;
 }
 
diff --git a/del.png b/del.png
deleted file mode 100644
index 5c73e82..0000000
--- a/del.png
+++ b/dev/null
diff --git a/ui-commit.c b/ui-commit.c
index b6a106f..8011dfc 100644
--- a/ui-commit.c
+++ b/ui-commit.c
@@ -20,25 +20,24 @@ static struct fileinfo {
 	unsigned short new_mode;
 	char *old_path;
 	char *new_path;
 	unsigned int added;
 	unsigned int removed;
 } *items;
 
 
 void print_fileinfo(struct fileinfo *info)
 {
 	char *query, *query2;
 	char *class;
-	double width;
 
 	switch (info->status) {
 	case DIFF_STATUS_ADDED:
 		class = "add";
 		break;
 	case DIFF_STATUS_COPIED:
 		class = "cpy";
 		break;
 	case DIFF_STATUS_DELETED:
 		class = "del";
 		break;
 	case DIFF_STATUS_MODIFIED:
@@ -87,36 +86,33 @@ void print_fileinfo(struct fileinfo *info)
 		      "copied" : "renamed");
 		query2 = fmt("id=%s", sha1_to_hex(info->old_sha1));
 		html_link_open(cgit_pageurl(cgit_query_repo, "view", query2),
 			       NULL, NULL);
 		html_txt(info->old_path);
 		html("</a>)");
 	} else {
 		html_txt(info->new_path);
 		html("</a>");
 	}
 	html("</td><td class='right'>");
 	htmlf("%d", info->added + info->removed);
-
 	html("</td><td class='graph'>");
-	width = (info->added + info->removed) * 100.0 / max_changes;
-	if (width < 0.1)
-		width = 0.1;
-	html_link_open(cgit_pageurl(cgit_query_repo, "diff", query),
-		       NULL, NULL);
-	htmlf("<img src='/cgit/add.png' style='width: %.1f%%;'/>",
-	      info->added * width / (info->added + info->removed));
-	htmlf("<img src='/cgit/del.png' style='width: %.1f%%;'/>",
-	      info->removed * width / (info->added + info->removed));
-	html("</a></td></tr>\n");
+	htmlf("<table width='%d%%'><tr>", (max_changes > 100 ? 100 : max_changes));
+	htmlf("<td class='add' style='width: %.1f%%;'/>",
+	      info->added * 100.0 / max_changes);
+	htmlf("<td class='rem' style='width: %.1f%%;'/>",
+	      info->removed * 100.0 / max_changes);
+	htmlf("<td class='none' style='width: %.1f%%;'/>",
+	      (max_changes - info->removed - info->added) * 100.0 / max_changes);
+	html("</tr></table></a></td></tr>\n");
 }
 
 void cgit_count_diff_lines(char *line, int len)
 {
 	if (line && (len > 0)) {
 		if (line[0] == '+')
 			lines_added++;
 		else if (line[0] == '-')
 			lines_removed++;
 	}
 }