Awesome 3.4 Spiral with padding

---------------------------------------------------------------------------
-- @author Uli Schlachter <[email protected]>
-- @copyright 2009 Uli Schlachter
-- @copyright 2008 Julien Danjou
-- @release v3.4.15
---------------------------------------------------------------------------

-- Grab environment we need
local ipairs = ipairs
local tonumber = tonumber
local beautiful = beautiful
local math = math

module("awful.layout.suit.spiral")

local function spiral(p, spiral)
    local padding = tonumber(beautiful.padding)
    if padding == nil then
        padding = 0
    end

    local wa = p.workarea
    local static_wa = wa
    local cls = p.clients
    local n = #cls

    for k, c in ipairs(cls) do
        if k < n then
            if k % 2 == 0 then
                wa.height = wa.height / 2
            else
                wa.width = wa.width / 2
            end
        end

        if k % 4 == 0 and spiral then
            wa.x = wa.x - wa.width
        elseif k % 2 == 0 or
            (k % 4 == 3 and k < n and spiral) then
            wa.x = wa.x + wa.width
        end

        if k % 4 == 1 and k ~= 1 and spiral then
            wa.y = wa.y - wa.height
        elseif k % 2 == 1 and k ~= 1 or
            (k % 4 == 0 and k < n and spiral) then
            wa.y = wa.y + wa.height
        end

        local wa2 = {}
        wa2.x = wa.x + padding
        wa2.y = wa.y + padding
        if spiral then
            wa2.width = wa.width - padding * ((k ~= 2 and k ~= 3) and 1 or 2)
            wa2.height = wa.height - padding * ((k == 2 or k > 4) and 1 or 2)
        else
            wa2.width = wa.width - padding * ((k % 2 == 1 and k ~= n) and 1 or 2)
            wa2.height = wa.height - padding * ((k % 2 == 0 and k ~= n) and 1 or 2)
        end

        c:geometry(wa2)
    end
end

--- Dwindle layout
dwindle = {}
dwindle.name = "dwindle"
function dwindle.arrange(p)
    return spiral(p, false)
end

--- Spiral layout
name = "spiral"
function arrange(p)
    return spiral(p, true)
end

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