vincentbernat.i3wm-configuration/lib/icons.lua

-- Lookup function for icons

local paths = {
   "/usr/share/icons/gnome-wine",
   "/usr/share/icons/gnome",
   "/usr/share/icons/hicolor",
   "/usr/share/icons/HighContrast",
   "/usr/share/fvwm-crystal/fvwm/icons/Default",
}
local sizes = {
   '32x32',
   '24x24',
   '22x22',
   '16x16',
}
local types = {
   'apps',
   'actions',
   'devices',
   'status',
}
local formats = {
   ".png",
   ".xpm"
}

local assert = assert
local type   = type
local pairs  = pairs
local awful  = require("awful")

module("vbe/icons")

-- Lookup for an icon. Return full path.
function lookup(arg)
   local inames = assert(arg.name)
   local isizes = arg.size or sizes
   local itypes = arg.type or types
   local ipaths = paths
   local iformats = formats
   if type(isizes) ~= "table" then isizes = { isizes } end
   if type(itypes) ~= "table" then itypes = { itypes } end
   if type(inames) ~= "table" then inames = { inames } end

   for _, path in pairs(ipaths) do
      for _, size in pairs(isizes) do
	 for _, t in pairs(itypes) do
	    for _, name in pairs(inames) do
	       if name then
		  for _, name in pairs({name, name:lower()}) do
		     for _, ext in pairs(iformats) do
			local icon = path .. "/" .. size .. "/" .. t .. "/" .. name .. ext
			if awful.util.file_readable(icon) then
			   return icon
			end
		     end
		  end
	       end
	    end
	 end
      end
   end
end