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--[[
Licensed under GNU General Public License v2
* (c) 2013, Luke Bonham
* (c) 2012, Josh Komoroske
* (c) 2010-2012, Peter Hofmann
--]]
local beautiful = require("beautiful")
local ipairs = ipairs
local math = { ceil = math.ceil, sqrt = math.sqrt }
local tonumber = tonumber
local uselessfair = {}
local function fair(p, orientation)
-- A useless gap (like the dwm patch) can be defined with
-- beautiful.useless_gap_width.
local useless_gap = tonumber(beautiful.useless_gap_width) or 0
local wa = p.workarea
local cls = p.clients
if #cls > 0 then
local cells = math.ceil(math.sqrt(#cls))
local strips = math.ceil(#cls / cells)
local cell = 0
local strip = 0
for k, c in ipairs(cls) do
local g = {}
-- Save actual grid index for use in the useless_gap
-- routine.
local this_x = 0
local this_y = 0
if ( orientation == "east" and #cls > 2 )
or ( orientation == "south" and #cls <= 2 ) then
if #cls < (strips * cells) and strip == strips - 1 then
g.width = wa.width / (cells - ((strips * cells) - #cls))
else
g.width = wa.width / cells
end
g.height = wa.height / strips
this_x = cell
this_y = strip
g.x = wa.x + cell * g.width
g.y = wa.y + strip * g.height
else
if #cls < (strips * cells) and strip == strips - 1 then
g.height = wa.height / (cells - ((strips * cells) - #cls))
else
g.height = wa.height / cells
end
g.width = wa.width / strips
this_x = strip
this_y = cell
g.x = wa.x + strip * g.width
g.y = wa.y + cell * g.height
end
-- Useless gap.
if useless_gap > 0
then
-- Top and left clients are shrinked by two steps and
-- get moved away from the border. Other clients just
-- get shrinked in one direction.
gap_factor = (useless_gap / 100) * 2
if this_x == 0
then
g.width = g.width - (2 + gap_factor) * useless_gap
g.x = g.x + useless_gap
else
g.width = g.width - (1 + gap_factor) * useless_gap
end
if this_y == 0
then
g.height = g.height - (2 + gap_factor) * useless_gap
g.y = g.y + useless_gap
else
g.height = g.height - (1 + gap_factor) * useless_gap
end
end
-- End of useless gap.
c:geometry(g)
cell = cell + 1
if cell == cells then
cell = 0
strip = strip + 1
end
end
end
end
--- Horizontal fair layout.
-- @param screen The screen to arrange.
uselessfair.horizontal = {}
uselessfair.horizontal.name = "uselessfairh"
function uselessfair.horizontal.arrange(p)
return fair(p, "east")
end
-- Vertical fair layout.
-- @param screen The screen to arrange.
uselessfair.name = "uselessfair"
function uselessfair.arrange(p)
return fair(p, "south")
end
return uselessfair
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