lib/beautiful.lua.in

   1 ----------------------------------------------------------------------------
   2 -- @author Damien Leone &lt;damien.leone@gmail.com&gt;
   3 -- @author Julien Danjou &lt;julien@danjou.info&gt;
   4 -- @copyright 2008-2009 Damien Leone, Julien Danjou
   5 -- @release @AWESOME_VERSION@
   6 ----------------------------------------------------------------------------
   7
   8 -- Grab environment
   9 local os = os
  10 local print = print
  11 local pcall = pcall
  12 local pairs = pairs
  13 local type = type
  14 local dofile = dofile
  15 local setmetatable = setmetatable
  16 local util = require("awful.util")
  17 local lgi = require("lgi")
  18 local cairo = lgi.cairo
  19 local Pango = lgi.Pango
  20 local PangoCairo = lgi.PangoCairo
  21 local capi =
  22 {
  23     screen = screen,
  24     awesome = awesome
  25 }
  26
  27 --- Theme library.
  28 local beautiful = { mt = {} }
  29
  30 -- Local data
  31 local theme
  32 local descs = setmetatable({}, { __mode = 'k' })
  33 local fonts = setmetatable({}, { __mode = 'v' })
  34 local active_font
  35
  36 local function load_font(name)
  37     name = name or active_font
  38     if name and type(name) ~= "string" and descs[name] then
  39         name = descs[name]
  40     end
  41     if fonts[name] then
  42         return fonts[name]
  43     end
  44     -- load new font
  45     local desc = Pango.FontDescription.from_string(name)
  46
  47     local ctx = PangoCairo.font_map_get_default():create_context()
  48     local layout = Pango.Layout.new(ctx)
  49     layout:set_font_description(desc)
  50
  51     local width, height = layout:get_pixel_size()
  52     local font = { name = name, description = desc, height = height }
  53     fonts[name] = font
  54     descs[desc] = name
  55     return font
  56 end
  57
  58 local function set_font(name)
  59     active_font = load_font(name).name
  60 end
  61
  62 function beautiful.get_font(name)
  63     return load_font(name).description
  64 end
  65
  66 function beautiful.get_font_height(name)
  67     return load_font(name).height
  68 end
  69
  70 --- Init function, should be runned at the beginning of configuration file.
  71 -- @param path The theme file path.
  72 function beautiful.init(path)
  73     if path then
  74         local success
  75         success, theme = pcall(function() return dofile(path) end)
  76
  77         if not success then
  78             return print("E: beautiful: error loading theme file " .. theme)
  79         elseif theme then
  80             -- try and grab user's $HOME directory
  81             local homedir = os.getenv("HOME")
  82             -- expand '~'
  83             if homedir then
  84                 for k, v in pairs(theme) do
  85                     if type(v) == "string" then theme[k] = v:gsub("~", homedir) end
  86                 end
  87             end
  88
  89             if theme.font then set_font(theme.font) end
  90             if theme.fg_normal then capi.awesome.fg = theme.fg_normal end
  91             if theme.bg_normal then capi.awesome.bg = theme.bg_normal end
  92         else
  93             return print("E: beautiful: error loading theme file " .. path)
  94         end
  95     else
  96         return print("E: beautiful: error loading theme: no path specified")
  97     end
  98 end
  99
 100 --- Get the current theme.
 101 -- @return The current theme table.
 102 function beautiful.get()
 103     return theme
 104 end
 105
 106 function beautiful.mt:__index(k)
 107     return theme[k]
 108 end
 109
 110 -- Set the default font
 111 set_font("sans 8")
 112
 113 return setmetatable(beautiful, beautiful.mt)
 114
 115 -- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80