Add log filtering by path and link to it from tree view

This enables path-filtering in log-view, and adds a link per entry in
tree-view to show the log for each file/directory.

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

cgit.c

@@ -108,9 +108,10 @@ static void cgit_print_repo_page(struct cacheitem *item)
 
 	if (!strcmp(cgit_query_page, "log")) {
 		cgit_print_log(cgit_query_head, cgit_query_ofs,
-			       cgit_max_commit_count, cgit_query_search);
+			       cgit_max_commit_count, cgit_query_search,
+			       cgit_query_path);
 	} else if (!strcmp(cgit_query_page, "tree")) {
-		cgit_print_tree(cgit_query_sha1, cgit_query_path);
+		cgit_print_tree(cgit_query_head, cgit_query_sha1, cgit_query_path);
 	} else if (!strcmp(cgit_query_page, "commit")) {
 		cgit_print_commit(cgit_query_sha1);
 	} else if (!strcmp(cgit_query_page, "view")) {

cgit.css

@@ -189,6 +189,11 @@ td.filesize {
 	font-family: monospace;
 }
 
+td.links {
+	font-size: 80%;
+	padding-left: 2em;
+}
+
 td.filemode {
 	font-family: monospace;
 }

cgit.h

@@ -169,10 +169,10 @@ extern void cgit_print_snapshot_start(const char *mimetype,
 
 extern void cgit_print_repolist(struct cacheitem *item);
 extern void cgit_print_summary();
-extern void cgit_print_log(const char *tip, int ofs, int cnt, char *grep);
+extern void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *path);
 extern void cgit_print_view(const char *hex, char *path);
 extern void cgit_print_blob(struct cacheitem *item, const char *hex, char *path);
-extern void cgit_print_tree(const char *hex, char *path);
+extern void cgit_print_tree(const char *rev, const char *hex, char *path);
 extern void cgit_print_commit(const char *hex);
 extern void cgit_print_diff(const char *old_hex, const char *new_hex, char *path);
 extern void cgit_print_snapshot(struct cacheitem *item, const char *hex, 

ui-commit.c

@@ -186,7 +186,8 @@ void cgit_print_commit(const char *hex)
 	cgit_print_date(info->committer_date);
 	html("</td></tr>\n");
 	html("<tr><th>tree</th><td colspan='2' class='sha1'><a href='");
-	query = fmt("id=%s", sha1_to_hex(commit->tree->object.sha1));
+	query = fmt("h=%s&id=%s", sha1_to_hex(commit->object.sha1),
+		    sha1_to_hex(commit->tree->object.sha1));
 	html_attr(cgit_pageurl(cgit_query_repo, "tree", query));
 	htmlf("'>%s</a></td></tr>\n", sha1_to_hex(commit->tree->object.sha1));
       	for (p = commit->parents; p ; p = p->next) {

ui-log.c

@@ -53,16 +53,20 @@ void print_commit(struct commit *commit)
 }
 
 
-void cgit_print_log(const char *tip, int ofs, int cnt, char *grep)
+void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *path)
 {
 	struct rev_info rev;
 	struct commit *commit;
-	const char *argv[3] = {NULL, tip, NULL};
+	const char *argv[] = {NULL, tip, NULL, NULL, NULL};
 	int argc = 2;
 	int i;
 
 	if (grep)
 		argv[argc++] = fmt("--grep=%s", grep);
+	if (path) {
+		argv[argc++] = "--";
+		argv[argc++] = path;
+	}
 	init_revisions(&rev, NULL);
 	rev.abbrev = DEFAULT_ABBREV;
 	rev.commit_format = CMIT_FMT_DEFAULT;

ui-tree.c

@@ -8,6 +8,7 @@
 
 #include "cgit.h"
 
+char *curr_rev;
 
 static int print_entry(const unsigned char *sha1, const char *base,
 		       int baselen, const char *pathname, unsigned int mode,
@@ -36,29 +37,40 @@ static int print_entry(const unsigned char *sha1, const char *base,
 	} else if (S_ISDIR(mode)) {
 		html("class='ls-dir'><a href='");
 		html_attr(cgit_pageurl(cgit_query_repo, "tree",
-				       fmt("id=%s&path=%s%s/", 
+				       fmt("h=%s&id=%s&path=%s%s/",
+					   curr_rev,
 					   sha1_to_hex(sha1),
 					   cgit_query_path ? cgit_query_path : "",
 					   pathname)));
 	} else {
 		html("class='ls-blob'><a href='");
 		html_attr(cgit_pageurl(cgit_query_repo, "view",
-				      fmt("id=%s&path=%s%s", sha1_to_hex(sha1),
+				      fmt("h=%s&id=%s&path=%s%s", curr_rev,
+					  sha1_to_hex(sha1),
 					  cgit_query_path ? cgit_query_path : "",
 					  pathname)));
 	}
 	htmlf("'>%s</a></div></td>", name);
 	htmlf("<td class='filesize'>%li</td>", size);
+
+	html("<td class='links'><a href='");
+	html_attr(cgit_pageurl(cgit_query_repo, "log",
+			       fmt("h=%s&path=%s%s",
+				   curr_rev,
+				   cgit_query_path ? cgit_query_path : "",
+				   pathname)));
+	html("'>history</a></td>");
 	html("</tr>\n");
 	free(name);
 	return 0;
 }
 
-void cgit_print_tree(const char *hex, char *path)
+void cgit_print_tree(const char *rev, const char *hex, char *path)
 {
 	struct tree *tree;
 	unsigned char sha1[20];
 
+	curr_rev = xstrdup(rev);
 	if (get_sha1_hex(hex, sha1)) {
 		cgit_print_error(fmt("Invalid object id: %s", hex));
 		return;
@@ -75,6 +87,7 @@ void cgit_print_tree(const char *hex, char *path)
 	html("<th class='left'>Mode</th>");
 	html("<th class='left'>Name</th>");
 	html("<th class='right'>Size</th>");
+	html("<th/>");
 	html("</tr>\n");
 	read_tree_recursive(tree, "", 0, 1, NULL, print_entry);
 	html("</table>\n");