awesome/lib/awful/startup_notification.lua

---------------------------------------------------------------------------
--- Startup notification module for awful
--
-- @author Julien Danjou <julien@danjou.info>
-- @copyright 2009 Julien Danjou
-- @module awful.startup_notification
---------------------------------------------------------------------------

-- Grab environment we need
local ipairs = ipairs
local table = table
local capi =
{
    awesome = awesome,
    root = root
}
local beautiful = require("beautiful")

local app_starting = {}

local cursor_waiting = "watch"

--- Show busy mouse cursor during spawn.
-- @beautiful beautiful.enable_spawn_cursor
-- @tparam[opt=true] boolean enable_spawn_cursor

local function update_cursor()
    if #app_starting > 0 and beautiful.enable_spawn_cursor ~= false then
        capi.root.cursor(cursor_waiting)
    else
        capi.root.cursor("left_ptr")
    end
end

local function unregister_event(event_id)
    for k, v in ipairs(app_starting) do
        if v == event_id then
            table.remove(app_starting, k)
            update_cursor()
            break
        end
    end
end

local function register_event(event_id)
    table.insert(app_starting, event_id)
    update_cursor()
end

local function unregister_hook(event) unregister_event(event.id) end
local function register_hook(event) register_event(event.id) end

capi.awesome.connect_signal("spawn::initiated", register_hook)
capi.awesome.connect_signal("spawn::canceled", unregister_hook)
capi.awesome.connect_signal("spawn::completed", unregister_hook)
capi.awesome.connect_signal("spawn::timeout", unregister_hook)

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