1 files changed, 64 insertions, 0 deletions
diff --git a/lib/awful/autofocus.lua b/lib/awful/autofocus.lua
new file mode 100644
index 0000000..5fcd220
--- /dev/null
+++ b/lib/awful/autofocus.lua
@@ -0,0 +1,64 @@
+---------------------------------------------------------------------------
+--- Autofocus functions.
+--
+-- When loaded, this module makes sure that there's always a client that will
+-- have focus on events such as tag switching, client unmanaging, etc.
+--
+-- @author Julien Danjou &lt;julien@danjou.info&gt;
+-- @copyright 2009 Julien Danjou
+-- @module awful.autofocus
+---------------------------------------------------------------------------
+
+local client = client
+local aclient = require("awful.client")
+local timer = require("gears.timer")
+
+--- Give focus when clients appear/disappear.
+--
+-- @param obj An object that should have a .screen property.
+local function check_focus(obj)
+    if not obj.screen.valid then return end
+    -- When no visible client has the focus...
+    if not client.focus or not client.focus:isvisible() then
+        local c = aclient.focus.history.get(screen[obj.screen], 0, aclient.focus.filter)
+        if c then
+            c:emit_signal("request::activate", "autofocus.check_focus",
+                          {raise=false})
+        end
+    end
+end
+
+--- Check client focus (delayed).
+-- @param obj An object that should have a .screen property.
+local function check_focus_delayed(obj)
+    timer.delayed_call(check_focus, {screen = obj.screen})
+end
+
+--- Give focus on tag selection change.
+--
+-- @param tag A tag object
+local function check_focus_tag(t)
+    local s = t.screen
+    if (not s) or (not s.valid) then return end
+    s = screen[s]
+    check_focus({ screen = s })
+    if client.focus and screen[client.focus.screen] ~= s then
+        local c = aclient.focus.history.get(s, 0, aclient.focus.filter)
+        if c then
+            c:emit_signal("request::activate", "autofocus.check_focus_tag",
+                          {raise=false})
+        end
+    end
+end
+
+tag.connect_signal("property::selected", function (t)
+    timer.delayed_call(check_focus_tag, t)
+end)
+client.connect_signal("unmanage",            check_focus_delayed)
+client.connect_signal("tagged",              check_focus_delayed)
+client.connect_signal("untagged",            check_focus_delayed)
+client.connect_signal("property::hidden",    check_focus_delayed)
+client.connect_signal("property::minimized", check_focus_delayed)
+client.connect_signal("property::sticky",    check_focus_delayed)
+
+-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80