awful.client: add tiled()

Signed-off-by: Julien Danjou <julien@danjou.info>

lib/awful/client.lua.in

@@ -7,7 +7,6 @@
 -- Grab environment we need
 local hooks = require("awful.hooks")
 local util = require("awful.util")
-local layout = require("awful.layout")
 local tag = require("awful.tag")
 local pairs = pairs
 local ipairs = ipairs
@@ -186,6 +185,21 @@ function visible(screen)
     return vcls
 end
 
+--- Get visible and tiled clients
+-- @param screen The screen number, or nil for all screens.
+-- @return A tabl with all visible and tiled clients.
+function tiled(screen)
+    local clients = visible(screen)
+    local tclients = {}
+    -- Remove floating clients
+    for k, c in pairs(clients) do
+        if not c.floating then
+            table.insert(tclients, c)
+        end
+    end
+    return tclients
+end
+
 --- Get a client by its relative index to the focused window.
 -- @usage Set i to 1 to get next, -1 to get previous.
 -- @param i The index.