---------------------------------------------------------------------------
-- @author Julien Danjou &lt;julien@danjou.info&gt;
-- @copyright 2009 Julien Danjou
-- @release v3.5.4
---------------------------------------------------------------------------

local client = client
local screen = screen
local aclient = require("awful.client")
local atag = require("awful.tag")

--- 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.
-- awful.autofocus

-- Give focus when clients appear/disappear.
-- @param obj An object that should have a .screen property.
local function check_focus(obj)
    -- When no visible client has the focus...
    if not client.focus or not client.focus:isvisible() then
        local c = aclient.focus.history.get(obj.screen, 0)
        if c then client.focus = c end
    end
end

-- Give focus on tag selection change.
-- @param tag A tag object
local function check_focus_tag(t)
    local s = atag.getscreen(t)
    if not s then return end
    check_focus({ screen = s })
    if client.focus and client.focus.screen ~= s then
        local c = aclient.focus.history.get(s, 0)
        if c then client.focus = c end
    end
end

atag.attached_connect_signal(nil, "property::selected", check_focus_tag)
client.connect_signal("unmanage", check_focus)
client.connect_signal("tagged", check_focus)
client.connect_signal("untagged", check_focus)
client.connect_signal("property::hidden", check_focus)
client.connect_signal("property::minimized", check_focus)

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