Trim the view to just a section list if there are multiple
sections present in the output view.  This is only really useful
if one also has a script placing links on each section heading to
trim the view by path.

Signed-off-by: Tim Nordell <[email protected]>

diff --git a/ui-repolist.c b/ui-repolist.c
index 93655d4..ff70ddc 100644
--- a/ui-repolist.c
+++ b/ui-repolist.c
@@ -278,6 +278,8 @@ struct repolist_ctx {
         * (Should be reset in repolist_walk_visible()) */
        int hits;
        const char *last_section;
+       int section_cnt;
+       int section_nested_cnt;
 };
 
 static void html_section(struct cgit_repo *repo, int columns)
@@ -375,6 +377,51 @@ static int generate_repolist(struct repolist_ctx *c, 
struct cgit_repo *repo)
        return 0;
 }
 
+static int generate_sectionlist(struct repolist_ctx *c, struct cgit_repo *repo)
+{
+       bool is_toplevel;
+
+       is_toplevel = (NULL == repo->section || repo->section[0] == '\0');
+
+       if (!should_emit_section(c, repo) && !is_toplevel)
+               return 0;
+
+       c->hits++;
+
+       if (c->hits <= ctx.qry.ofs)
+               return 0;
+       if (c->hits > ctx.qry.ofs + ctx.cfg.max_repo_count)
+               return 0;
+
+       if (is_toplevel)
+               html_repository(repo, c->sorted);
+       else
+               html_section(repo, c->columns);
+
+       return 0;
+}
+
+static int count_sections(struct repolist_ctx *c, struct cgit_repo *repo)
+{
+       const char *last_section;
+
+       last_section = c->last_section;
+       if (should_emit_section(c, repo)) {
+               c->section_cnt++;
+
+               /* Determine if one section is nested within the other.  This
+                * is only accurate if this is a sorted list.
+                */
+               if (NULL != last_section && NULL != repo->section &&
+                   last_section[strspn(last_section, repo->section)] == '\0')
+                       c->section_nested_cnt++;
+       }
+
+       c->hits++;
+
+       return 0;
+}
+
 typedef int (*repolist_walk_callback_t)(struct repolist_ctx *c, struct 
cgit_repo *repo);
 static int repolist_walk_visible(struct repolist_ctx *c, 
repolist_walk_callback_t callback)
 {
@@ -383,6 +430,8 @@ static int repolist_walk_visible(struct repolist_ctx *c, 
repolist_walk_callback_
 
        c->hits = 0;
        c->last_section = NULL;
+       c->section_cnt = 0;
+       c->section_nested_cnt = 0;
 
        for (i = 0; i < cgit_repolist.count; i++) {
                repo = &cgit_repolist.repos[i];
@@ -396,6 +445,7 @@ static int repolist_walk_visible(struct repolist_ctx *c, 
repolist_walk_callback_
 
 void cgit_print_repolist(void)
 {
+       bool section_pages = false;
        struct repolist_ctx repolist_ctx;
 
        repolist_ctx.columns      = 3;
@@ -421,12 +471,23 @@ void cgit_print_repolist(void)
 
        if (ctx.qry.sort)
                repolist_ctx.sorted = sort_repolist(ctx.qry.sort);
-       else if (ctx.cfg.section_sort)
+       else if (ctx.cfg.section_sort) {
                sort_repolist("section");
+               section_pages = (2 == ctx.cfg.section_sort);
+       }
 
        html("<table summary='repository list' class='list nowrap'>");
        print_header();
-       repolist_walk_visible(&repolist_ctx, generate_repolist);
+
+       if (section_pages)
+               repolist_walk_visible(&repolist_ctx, count_sections);
+
+       if (section_pages && repolist_ctx.hits > ctx.cfg.max_repo_count &&
+               repolist_ctx.section_cnt - repolist_ctx.section_nested_cnt > 1)
+               repolist_walk_visible(&repolist_ctx, generate_sectionlist);
+       else
+               repolist_walk_visible(&repolist_ctx, generate_repolist);
+
        html("</table>");
        if (repolist_ctx.hits > ctx.cfg.max_repo_count)
                print_pager(repolist_ctx.hits, ctx.cfg.max_repo_count, 
ctx.qry.search, ctx.qry.sort);
-- 
2.4.9

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