Add ofs argument to cgit_log_link and use it in ui-log.c

This fixes a bug in the prev/next links on the log page: when on the default
branch the links to prev/next page would contain h=(null).

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

cgit.h

@@ -206,7 +206,7 @@ extern char *cgit_pageurl(const char *reponame, const char *pagename,
 extern void cgit_tree_link(char *name, char *title, char *class, char *head,
 			   char *rev, char *path);
 extern void cgit_log_link(char *name, char *title, char *class, char *head,
-			  char *rev, char *path);
+			  char *rev, char *path, int ofs);
 extern void cgit_commit_link(char *name, char *title, char *class, char *head,
 			     char *rev);
 extern void cgit_diff_link(char *name, char *title, char *class, char *head,

ui-log.c

@@ -113,17 +113,15 @@ void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *path, i
 	if (pager) {
 		html("<div class='pager'>");
 		if (ofs > 0) {
-			html("&nbsp;<a href='");
-			html(cgit_pageurl(cgit_query_repo, cgit_query_page,
-					  fmt("h=%s&amp;ofs=%d", tip, ofs-cnt)));
-			html("'>[prev]</a>&nbsp;");
+			cgit_log_link("[prev]", NULL, NULL, cgit_query_head,
+				      cgit_query_sha1, cgit_query_path,
+				      ofs - cnt);
+			html("&nbsp;");
 		}
-
 		if ((commit = get_revision(&rev)) != NULL) {
-			html("&nbsp;<a href='");
-			html(cgit_pageurl(cgit_query_repo, "log",
-					  fmt("h=%s&amp;ofs=%d", tip, ofs+cnt)));
-			html("'>[next]</a>&nbsp;");
+			cgit_log_link("[next]", NULL, NULL, cgit_query_head,
+				      cgit_query_sha1, cgit_query_path,
+				      ofs + cnt);
 		}
 		html("</div>");
 	}

ui-repolist.c

@@ -98,7 +98,7 @@ void cgit_print_repolist(struct cacheitem *item)
 			html_link_open(cgit_repourl(cgit_repo->url),
 				       NULL, "button");
 			html("summary</a>");
-			cgit_log_link("log", NULL, "button", NULL, NULL, NULL);
+			cgit_log_link("log", NULL, "button", NULL, NULL, NULL, 0);
 			cgit_tree_link("tree", NULL, "button", NULL, NULL, NULL);
 			html("</td>");
 		}

ui-shared.c

@@ -163,9 +163,25 @@ void cgit_tree_link(char *name, char *title, char *class, char *head,
 }
 
 void cgit_log_link(char *name, char *title, char *class, char *head,
-		   char *rev, char *path)
+		   char *rev, char *path, int ofs)
 {
-	reporevlink("log", name, title, class, head, rev, path);
+	char *delim;
+
+	delim = repolink(title, class, "log", head, path);
+	if (rev && strcmp(rev, cgit_query_head)) {
+		html(delim);
+		html("id=");
+		html_attr(rev);
+		delim = "&";
+	}
+	if (ofs > 0) {
+		html(delim);
+		html("ofs=");
+		htmlf("%d", ofs);
+	}
+	html("'>");
+	html_txt(name);
+	html("</a>");
 }
 
 void cgit_commit_link(char *name, char *title, char *class, char *head,
@@ -302,7 +318,7 @@ void cgit_print_pageheader(char *title, int show_search)
 			    NULL, NULL);
 		html(" ");
 		cgit_log_link("log", NULL, NULL, cgit_query_head,
-			      cgit_query_sha1, cgit_query_path);
+			      cgit_query_sha1, cgit_query_path, 0);
 		html(" ");
 		cgit_tree_link("tree", NULL, NULL, cgit_query_head,
 			       cgit_query_sha1, NULL);

ui-summary.c

@@ -27,7 +27,7 @@ static int cgit_print_branch_cb(const char *refname, const unsigned char *sha1,
 	if (commit && !parse_commit(commit)){
 		info = cgit_parse_commit(commit);
 		html("<tr><td>");
-		cgit_log_link(ref, NULL, NULL, ref, NULL, NULL);
+		cgit_log_link(ref, NULL, NULL, ref, NULL, NULL, 0);
 		html("</td><td>");
 		cgit_print_age(commit->date, -1, NULL);
 		html("</td><td>");

ui-tree.c

@@ -93,7 +93,7 @@ static int ls_item(const unsigned char *sha1, const char *base, int baselen,
 
 	html("<td>");
 	cgit_log_link("log", NULL, "button", cgit_query_head, curr_rev,
-		      fullpath);
+		      fullpath, 0);
 	html("</td></tr>\n");
 	free(name);
 	return 0;