Improve menu loading speed with some caching

base.lua

@@ -294,6 +294,7 @@ local function new(args)
   end
 
   set_map.visible = function(value)
+    private_data.visible = value
     if value then
       local fit_w,fit_h = data._internal.layout:fit()
       data.width = fit_w
@@ -308,7 +309,6 @@ local function new(args)
     if internal.set_visible then
       internal:set_visible(value)
     end
-    private_data.visible = value
     if value and not capi.keygrabber.isrunning() then
       activateKeyboard(data)
     elseif data.parent_geometry and not data.parent_geometry.is_menu then

context.lua

@@ -95,7 +95,7 @@ local function setup_drawable(data)
   get_map.y         = function() return internal.w.y end
   get_map.width     = function() return internal.w.width end
   get_map.height    = function() return internal.w.height end
-  get_map.visible   = function() return internal.w.visible end
+  get_map.visible   = function() return private_data.visible end
   get_map.direction = function() return private_data.direction end
   get_map.margins   = function()
     local ret = {left=data.border_width,right=data.border_width,top=data.style.margins.TOP,bottom=data.style.margins.BOTTOM}

layout/horizontal.lua

@@ -191,6 +191,7 @@ end
 
 --Get preferred item geometry
 local function item_fit(data,item,...)
+  if not data.visible then return 1,1 end
   local w, h = item._private_data._fit(...)
   return data.item_width or 70, item._private_data.height or h
 end

layout/vertical.lua

@@ -52,7 +52,11 @@ end
 
 --Get preferred item geometry
 local function item_fit(data,item,...)
-  local w, h = item._private_data._fit(...)
+  local w, h = item._internal.cache_w or 1,item._internal.cache_h or 1
+  if item._internal.has_changed and data.visible then
+    w, h = item._private_data._fit(...)
+    item._internal.has_changed = false
+  end
   return w, item._private_data.height or h
 end
 
@@ -61,6 +65,7 @@ function module:setup_item(data,item,args)
   item.widget = wibox.widget.background()
   data.item_style(data,item,false,false)
   item.widget:set_fg(item._private_data.fg)
+  item._internal.has_changed = true
 
   --Event handling
   item.widget:connect_signal("mouse::enter", function() item.selected = true end)
@@ -105,10 +110,10 @@ function module:setup_item(data,item,args)
   local text_w = wibox.widget.textbox()
   item._private_data._fit = wibox.widget.background.fit
   m.fit = function(...)
-      if item.visible == false or item._filter_out == true then
+    if not data.visible or (item.visible == false or item._filter_out == true) then
-        return 0,0
+      return 1,1
-      end
+    end
-      return data._internal.layout.item_fit(data,item,...)
+    return data._internal.layout.item_fit(data,item,...)
   end
 
   if data.fkeys_prefix == true then
@@ -140,7 +145,7 @@ function module:setup_item(data,item,args)
     lr:add(subArrow)
     item.widget.fit = function(box,w,h,...)
       args.y = data.height-h-data.margins.top
-      return wibox.widget.background.fit(box,w,h,...)
+      return item._internal.cache_w,item._internal.cache_h
     end
   end
   if item.checkable then
@@ -157,6 +162,7 @@ function module:setup_item(data,item,args)
     item._internal.set_map.checked = function (value)
       item._private_data.checked = value
       ck:set_image(item.checked and checkbox.checked() or checkbox.unchecked())
+      item._internal.has_changed = true
     end
   end
   if args.suffix_widget then
@@ -174,6 +180,7 @@ function module:setup_item(data,item,args)
     if data.auto_resize then
       local fit_w,fit_h = text_w:fit(999,9999)
       local is_largest = item == data._internal.largest_item_w
+      item._internal.has_changed = true
       if not data._internal.largest_item_w_v or data._internal.largest_item_w_v < fit_w then
         data._internal.largest_item_w = item
         data._internal.largest_item_w_v = fit_w
@@ -230,6 +237,7 @@ local function new(data)
     real_l = l
   end
   real_l.fit = function(a1,a2,a3)
+    if not data.visible then return 1,1 end
     local result,r2 = wibox.layout.fixed.fit(a1,99999,99999)
     local total = data._total_item_height
     return compute_geo(data)