[beautiful] Beautiful initialization handle path or table

Allow beautiful to be initialized either with a path to the theme file or directly with a table

lib/beautiful.lua.in

@@ -72,16 +72,24 @@ function beautiful.get_font_height(name)
 end
 
 --- Init function, should be runned at the beginning of configuration file.
--- @param path The theme file path.
-function beautiful.init(path)
-    if path then
+-- @param config The theme to load. It can be either the path to the theme file
+-- (returning a table) or directly the table containing all the theme values
+function beautiful.init(config)
+    if config then
         local success
-
-        -- try and grab user's $HOME directory and expand '~'
         local homedir = os.getenv("HOME")
-        path = path:gsub("^~/", homedir .. "/")
 
-        success, theme = pcall(function() return dofile(path) end)
+        -- If config is the path to the theme file,
+        -- run this file,
+        -- else if it is the theme table, save it
+        if type(config) == 'string' then
+            -- Expand the '~' $HOME shortcut
+            config = config:gsub("^~/", homedir .. "/")
+            success, theme = pcall(function() return dofile(config) end)
+        elseif type(config) == 'table' then
+            success = true
+            theme = config
+        end
 
         if not success then
             return print("E: beautiful: error loading theme file " .. theme)
@@ -95,10 +103,10 @@ function beautiful.init(path)
 
             if theme.font then set_font(theme.font) end
         else
-            return print("E: beautiful: error loading theme file " .. path)
+            return print("E: beautiful: error loading theme file " .. config)
         end
     else
-        return print("E: beautiful: error loading theme: no path specified")
+        return print("E: beautiful: error loading theme: no theme specified")
     end
 end