luci-theme-openwrt: rework menu rendering

Utilize the LuCI.ui.menu class to load, traverse and cache the menu tree
in the local session store.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 133 insertions, 0 deletions

diff --git a/themes/luci-theme-openwrt/htdocs/luci-static/resources/menu-openwrt.js b/themes/luci-theme-openwrt/htdocs/luci-static/resources/menu-openwrt.js
new file mode 100644
index 0000000000..ca97838d3a
--- /dev/null
+++ b/themes/luci-theme-openwrt/htdocs/luci-static/resources/menu-openwrt.js
@@ -0,0 +1,133 @@
+'use strict';
+'require baseclass';
+'require ui';
+
+return baseclass.extend({
+	__init__: function() {
+		ui.menu.load().then(L.bind(this.render, this));
+	},
+
+	render: function(tree) {
+		var node = tree,
+		    url = '';
+
+		this.renderModeMenu(tree);
+
+		if (L.env.dispatchpath.length >= 3) {
+			for (var i = 0; i < 3 && node; i++) {
+				node = node.children[L.env.dispatchpath[i]];
+				url = url + (url ? '/' : '') + L.env.dispatchpath[i];
+			}
+
+			if (node)
+				this.renderTabMenu(node, url);
+		}
+	},
+
+	handleMenuExpand: function(ev) {
+		var a = ev.target, ul1 = a.parentNode.parentNode, ul2 = a.nextElementSibling;
+
+		document.querySelectorAll('ul.mainmenu.l1 > li.active').forEach(function(li) {
+			if (li !== a.parentNode)
+				li.classList.remove('active');
+		});
+
+		if (!ul2)
+			return;
+
+		if (ul2.parentNode.offsetLeft + ul2.offsetWidth <= ul1.offsetLeft + ul1.offsetWidth)
+			ul2.classList.add('align-left');
+
+		ul1.classList.add('active');
+		a.parentNode.classList.add('active');
+		a.blur();
+
+		ev.preventDefault();
+		ev.stopPropagation();
+	},
+
+	renderMainMenu: function(tree, url, level) {
+		var l = (level || 0) + 1,
+		    ul = E('ul', { 'class': 'mainmenu l%d'.format(l) }),
+		    children = ui.menu.getChildren(tree);
+
+		if (children.length == 0 || l > 2)
+			return E([]);
+
+		for (var i = 0; i < children.length; i++) {
+			var isActive = (L.env.dispatchpath[l] == children[i].name),
+			    activeClass = 'mainmenu-item-%s%s'.format(children[i].name, isActive ? ' selected' : '');
+
+			ul.appendChild(E('li', { 'class': activeClass }, [
+				E('a', {
+					'href': L.url(url, children[i].name),
+					'click': (l == 1) ? this.handleMenuExpand : null,
+				}, [ _(children[i].title) ]),
+				this.renderMainMenu(children[i], url + '/' + children[i].name, l)
+			]));
+		}
+
+		if (l == 1) {
+			var container = document.querySelector('#mainmenu');
+
+			container.appendChild(ul);
+			container.style.display = '';
+		}
+
+		return ul;
+	},
+
+	renderModeMenu: function(tree) {
+		var ul = document.querySelector('#modemenu'),
+		    children = ui.menu.getChildren(tree);
+
+		for (var i = 0; i < children.length; i++) {
+			var isActive = (L.env.requestpath.length ? children[i].name == L.env.requestpath[0] : i == 0);
+
+			ul.appendChild(E('li', {}, [
+				E('a', {
+					'href': L.url(children[i].name),
+					'class': isActive ? 'active' : null
+				}, [ _(children[i].title) ])
+			]));
+
+			if (isActive)
+				this.renderMainMenu(children[i], children[i].name);
+		}
+
+		if (ul.children.length > 1)
+			ul.style.display = '';
+	},
+
+	renderTabMenu: function(tree, url, level) {
+		var container = document.querySelector('#tabmenu'),
+		    l = (level || 0) + 1,
+		    ul = E('ul', { 'class': 'cbi-tabmenu' }),
+		    children = ui.menu.getChildren(tree),
+		    activeNode = null;
+
+		if (children.length == 0)
+			return E([]);
+
+		for (var i = 0; i < children.length; i++) {
+			var isActive = (L.env.dispatchpath[l + 2] == children[i].name),
+			    activeClass = isActive ? ' cbi-tab' : '',
+			    className = 'tabmenu-item-%s %s'.format(children[i].name, activeClass);
+
+			ul.appendChild(E('li', { 'class': className }, [
+				E('a', { 'href': L.url(url, children[i].name) }, [ _(children[i].title) ] )
+			]));
+
+			if (isActive)
+				activeNode = children[i];
+		}
+
+		container.appendChild(ul);
+		container.style.display = '';
+
+		if (activeNode)
+			container.appendChild(this.renderTabMenu(activeNode, url + '/' + activeNode.name, l));
+
+		return ul;
+	}
+});