From be8dba57a9824179a6b942e27e7203d0ba921129 Mon Sep 17 00:00:00 2001
From: Jo-Philipp Wich <jow@openwrt.org>
Date: Mon, 18 Jan 2016 11:23:07 +0100
Subject: [PATCH] luci-base: improve tab hide logic

Do not rely on explicit child counts but inspect the code instead to decide
when to hide tabs or not.

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>
---
 .../htdocs/luci-static/resources/cbi.js       | 26 +++++++------------
 modules/luci-base/luasrc/view/cbi/tabmenu.htm |  1 -
 2 files changed, 10 insertions(+), 17 deletions(-)

diff --git a/modules/luci-base/htdocs/luci-static/resources/cbi.js b/modules/luci-base/htdocs/luci-static/resources/cbi.js
index 15645d902..dd8d7b8ee 100644
--- a/modules/luci-base/htdocs/luci-static/resources/cbi.js
+++ b/modules/luci-base/htdocs/luci-static/resources/cbi.js
@@ -13,7 +13,6 @@
 
 var cbi_d = [];
 var cbi_t = [];
-var cbi_c = [];
 
 var cbi_validators = {
 
@@ -475,8 +474,6 @@ function cbi_d_update() {
 		if (node && node.parentNode && !cbi_d_check(entry.deps)) {
 			node.parentNode.removeChild(node);
 			state = true;
-			if( entry.parent && typeof(cbi_c[entry.parent]) == 'number')
-				cbi_c[entry.parent]--;
 		} else if ((!node || !node.parentNode) && cbi_d_check(entry.deps)) {
 			if (!next) {
 				parent.appendChild(entry.node);
@@ -484,8 +481,6 @@ function cbi_d_update() {
 				next.parentNode.insertBefore(entry.node, next);
 			}
 			state = true;
-			if( entry.parent && typeof(cbi_c[entry.parent]) == 'number' )
-				cbi_c[entry.parent]++;
 		}
 	}
 
@@ -935,25 +930,24 @@ function cbi_t_update() {
 	for( var sid in cbi_t )
 		for( var tid in cbi_t[sid] )
 		{
-			if (typeof(cbi_c[cbi_t[sid][tid].cid]) !== 'number') {
-				continue;
-			}
-			else if( cbi_c[cbi_t[sid][tid].cid] == 0 ) {
-				cbi_t[sid][tid].tab.style.display = 'none';
-			}
-			else if( cbi_t[sid][tid].tab && cbi_t[sid][tid].tab.style.display == 'none' ) {
-				cbi_t[sid][tid].tab.style.display = '';
+			var t = cbi_t[sid][tid].tab;
+			var c = cbi_t[sid][tid].container;
+			var n = c.getElementsByTagName('div');
 
-				var t = cbi_t[sid][tid].tab;
+			if (n.length === 0) {
+				t.style.display = 'none';
+			}
+			else if (t.style.display == 'none') {
+				t.style.display = '';
 				t.className += ' cbi-tab-highlighted';
 				hl_tabs.push(t);
 			}
 
-			cbi_tag_last(cbi_t[sid][tid].container);
+			cbi_tag_last(c);
 			updated = true;
 		}
 
-	if( hl_tabs.length > 0 )
+	if (hl_tabs.length > 0)
 		window.setTimeout(function() {
 			for( var i = 0; i < hl_tabs.length; i++ )
 				hl_tabs[i].className = hl_tabs[i].className.replace(/ cbi-tab-highlighted/g, '');
diff --git a/modules/luci-base/luasrc/view/cbi/tabmenu.htm b/modules/luci-base/luasrc/view/cbi/tabmenu.htm
index b96ac9ce4..06c1414bf 100644
--- a/modules/luci-base/luasrc/view/cbi/tabmenu.htm
+++ b/modules/luci-base/luasrc/view/cbi/tabmenu.htm
@@ -2,7 +2,6 @@
 	<ul class="cbi-tabmenu">
 	<%- self.selected_tab = luci.http.formvalue("tab." .. self.config .. "." .. section) %>
 	<%- for _, tab in ipairs(self.tab_names) do if #self.tabs[tab].childs > 0 then %>
-		<script type="text/javascript">cbi_c['container.<%=self.config%>.<%=section%>.<%=tab%>'] = <%=#self.tabs[tab].childs%>;</script>
 		<%- if not self.selected_tab then self.selected_tab = tab end %>
 		<li id="tab.<%=self.config%>.<%=section%>.<%=tab%>" class="cbi-tab<%=(tab == self.selected_tab) and '' or '-disabled'%>">
 			<a onclick="this.blur(); return cbi_t_switch('<%=self.config%>.<%=section%>', '<%=tab%>')" href="<%=REQUEST_URI%>?tab.<%=self.config%>.<%=section%>=<%=tab%>"><%=self.tabs[tab].title%></a>
-- 
2.25.1