lua add a way to filter settings on read rather than dumping all the settings allow a filter function to choose desired settings

in menucoresettings you can see an how to do exact text matches
or wilcard matches you can even use luas version of regex

Change-Id: I4c7f7592498ea194e06e9a556b77ffd57f5d4223

apps/plugins/lua/include_lua/menucoresettings.lua

···
 
     tmploader("rbsettings")
     tmploader("settings")
+    -- these are exact matches color and talk are wildcard matches
+    local list_settings = "cursor_style|show_icons|statusbar|scrollbar|scrollbar_width|list_separator_height|backdrop_file|"
+    local function filterfn(struct, k)
+        k = k or ""
+        --rbold.splash(100, struct .. " " .. k)
+        return (k:find("color") or k:find("talk") or list_settings:find(k))
+    end
+    local rb_settings = rb.settings.dump('global_settings', "system", nil, nil, filterfn)
 
-    local rb_settings = rb.settings.dump('global_settings', "system")
     local color_table = {}
     local talk_table = {}
     local list_settings_table = {}
-    local list_settings = "cursor_style|show_icons|statusbar|scrollbar|scrollbar_width|list_separator_height|backdrop_file|"
 
     for key, value in pairs(rb_settings) do
             key = key or ""
             if (key:find("color")) then
-                    color_table[key]=value
+                color_table[key]=value
             elseif (key:find("talk")) then
-                    talk_table[key]=value
-            elseif (list_settings:find(key)) then
-                    list_settings_table[key]=value
+                talk_table[key]=value
+            else --if (list_settings:find(key)) then
+                list_settings_table[key]=value
             end
     end
 

apps/plugins/lua/include_lua/rbsettings.lua

···
     return data
 end
 
-function rb.settings.dump(s_settings, s_groupname, s_structname, t_output)
+function rb.settings.dump(s_settings, s_groupname, s_structname, t_output, fn_filter)
     t_output = t_output or {}
+    fn_filter = fn_filter or function(s,k) return true end
     local tgroup = rb[s_groupname]
     s_structname = s_structname or s_settings
     for k, v in pairs(tgroup[s_structname]) do
-        t_output[k] = rb.settings.read(s_settings, v, s_groupname)
+        if fn_filter(s_structname, k) then
+            t_output[k] = rb.settings.read(s_settings, v, s_groupname)
+        end
     end
     return t_output
 end