awesome/lib/awful/layout/init.lua.in

---------------------------------------------------------------------------
-- @author Julien Danjou <julien@danjou.info>
-- @copyright 2008 Julien Danjou
-- @release @AWESOME_VERSION@
---------------------------------------------------------------------------

-- Grab environment we need
local ipairs = ipairs
local tag = require("awful.tag")
local util = require("awful.util")
local suit = require("awful.layout.suit")
local client = require("awful.client")
local capi =
{
    hooks = hooks,
    screen = screen
}
local hooks = require("awful.hooks")

--- Layout module for awful
module("awful.layout")

--- Get the current layout.
-- @param screen The screen number.
-- @return The layout function.
function get(screen)
    local t = tag.selected(screen)
    return tag.getproperty(t, "layout") or suit.floating
end

--- Change the layout of the current tag.
-- @param layouts A table of layouts.
-- @param i Relative index.
function inc(layouts, i)
    local t = tag.selected()
    if t then
        local curlayout = get()
        local curindex
        local rev_layouts = {}
        for k, v in ipairs(layouts) do
            if v == curlayout then
                curindex = k
                break
            end
        end
        if curindex then
            local newindex = util.cycle(#layouts, curindex + i)
            set(layouts[newindex])
        end
    end
end

--- Set the layout function of the current tag.
-- @param layout Layout name.
function set(layout, t)
    t = t or tag.selected()
    tag.setproperty(t, "layout", layout)
    capi.hooks.arrange()(t.screen)
end

-- Register an arrange hook.
local function on_arrange (screen)
    local t = tag.selected(screen)
    local p = {}
    p.workarea = capi.screen[screen].workarea
    p.geometry = capi.screen[screen].geometry
    p.clients = client.tiled(screen)
    p.ncol = tag.getncol(t)
    p.nmaster = tag.getnmaster(t)
    p.mwfact = tag.getmwfact(t)
    p.tagdata = tag.getdata(t)
    p.screen = screen
    get(screen).arrange(p)
end

--- Get the current layout name.
-- @param layout The layout.
-- @return The layout name.
function getname(layout)
    local layout = layout or get()
    return layout.name
end

hooks.arrange.register(on_arrange)
hooks.property.register(function (c, prop)
    if c:isvisible() and prop == "size_hints_honor" then
        on_arrange(c.screen)
    end
end)

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