#+title: awesome tips

* run and raise

  1. This feature need files: 'aweror.lua' and 'ror.lua'.
  2. Put this two files at the same path with 'rc.lua'.
  3. add the follow code to the end of 'keybinding' section in 'rc.lua'.
  #+BEGIN_SRC lua
    -- load the 'run or raise' function
    local ror = require("aweror")

    -- generate and add the 'run or raise' key bindings to the globalkeys table
    globalkeys = awful.util.table.join(globalkeys, ror.genkeys(altkey))

    -- Set keys
    root.keys(globalkeys)
  #+END_SRC
  
* signal

  turn off energy saving when some window is fullscreen
  #+BEGIN_SRC lua
    local fullscreened_clients = {}

    local function remove_client(tabl, c)
      local index = awful.util.table.hasitem(tabl, c)
      if index then
        table.remove(tabl, index)
        if #tabl == 0 then
          awful.util.spawn("xset s on")
          awful.util.spawn("xset +dpms")
        end
      end
    end

    client.connect_signal("property::fullscreen",
                          function(c)
                            if c.fullscreen then
                              table.insert(fullscreened_clients, c)
                              if #fullscreened_clients == 1 then
                                awful.util.spawn("xset s off")
                                awful.util.spawn("xset -dpms")
                              end
                            else
                              remove_client(fullscreened_clients, c)
                            end
                          end
    )

    client.connect_signal("unmanage",
                          function(c)
                            if c.fullscreen then
                              remove_client(fullscreened_clients, c)
                            end
                          end
    )
  #+END_SRC

* test

  | gd | bd | sum |
  |----+----+-----|
  |  3 |  7 |   7 |
  |  4 |  3 |  12 |
  #+TBLFM: @2$3=@3$1+@3$2::@3$3=@3$1*@3$2