--[[
Licensed under GNU General Public License v2
* (c) 2014, projektile
* (c) 2013, Luke Bonham
* (c) 2010, Nicolas Estibals
* (c) 2010-2012, Peter Hofmann
--]]
local tag = require("awful.tag")
local beautiful = require("beautiful")
local math = { ceil = math.ceil,
floor = math.floor,
max = math.max }
local tonumber = tonumber
local centerfair = { name = "centerfair" }
function centerfair.arrange(p)
-- Layout with fixed number of vertical columns (read from nmaster).
-- Cols are centerded until there is nmaster columns, then windows
-- are stacked in the slave columns, with at most ncol clients per
-- column if possible.
-- with nmaster=3 and ncol=1 you'll have
-- (1) (2) (3)
-- +---+---+---+ +-+---+---+-+ +---+---+---+
-- | | | | | | | | | | | | |
-- | | 1 | | -> | | 1 | 2 | | -> | 1 | 2 | 3 | ->
-- | | | | | | | | | | | | |
-- +---+---+---+ +-+---+---+-+ +---+---+---+
-- (4) (5)
-- +---+---+---+ +---+---+---+
-- | | | 3 | | | 2 | 4 |
-- + 1 + 2 +---+ -> + 1 +---+---+
-- | | | 4 | | | 3 | 5 |
-- +---+---+---+ +---+---+---+
-- 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
if useless_gap < 0 then useless_gap = 0 end
-- A global border can be defined with
-- beautiful.global_border_width
local global_border = tonumber(beautiful.global_border_width) or 0
if global_border < 0 then global_border = 0 end
-- Themes border width requires an offset
local bw = tonumber(beautiful.border_width) or 0
-- Screen.
local wa = p.workarea
local cls = p.clients
-- Borders are factored in.
wa.height = wa.height - ((global_border * 2) + (bw * 2))
wa.width = wa.width - ((global_border * 2) + (bw * 2))
-- How many vertical columns? Read from nmaster on the tag.
local t = tag.selected(p.screen)
local num_x = centerfair.nmaster or tag.getnmaster(t)
local ncol = centerfair.ncol or tag.getncol(t)
if num_x <= 2 then num_x = 2 end
if num_x > #cls then num_x = #cls end
local width = math.floor((wa.width-(num_x+1)*useless_gap) / num_x)
local offset_y = wa.y + useless_gap
if #cls < num_x
then
-- Less clients than the number of columns, let's center it!
local offset_x = wa.x + useless_gap + (wa.width - #cls*width - (#cls+1)*useless_gap) / 2
local g = {}
g.width = width
g.height = wa.height - 2*useless_gap - 2
g.y = offset_y + global_border
for i = 1, #cls do
g.x = offset_x + (i - 1) * (width + useless_gap + 2) + global_border
cls[i]:geometry(g)
end
else
-- More clients than the number of columns, let's arrange it!
local offset_x = wa.x
if useless_gap > 0 then
offset_x = offset_x
end
-- Master client deserves a special treatement
local g = {}
g.width = wa.width - (num_x - 1) * width - num_x * 2*useless_gap - 2
g.height = wa.height - 2*useless_gap - 2
g.x = offset_x + useless_gap + global_border
g.y = offset_y + global_border
if cls[1] then
cls[1]:geometry(g)
end
-- Treat the other clients
-- Compute distribution of clients among columns
local num_y ={}
do
local remaining_clients = #cls-1
local ncol_min = math.ceil(remaining_clients/(num_x-1))
if ncol >= ncol_min
then
for i = (num_x-1), 1, -1 do
if (remaining_clients-i+1) < ncol
then
num_y[i] = remaining_clients-i + 1
else
num_y[i] = ncol
end
remaining_clients = remaining_clients - num_y[i]
end
else
local rem = remaining_clients % (num_x-1)
if rem ==0
then
for i = 1, num_x-1 do
num_y[i] = ncol_min
end
else
for i = 1, num_x-1 do
num_y[i] = ncol_min - 1
end
for i = 0, rem-1 do
num_y[num_x-1-i] = num_y[num_x-1-i] + 1
end
end
end
end
-- Compute geometry of the other clients
local nclient = 2
g.x = g.x + g.width+useless_gap + 2
g.width = width
if useless_gap > 0 then
g.width = g.width + useless_gap - 2
end
for i = 1, (num_x-1) do
to_remove = 2
g.height = math.floor((wa.height - (num_y[i] * useless_gap)) / num_y[i])
g.y = offset_y + global_border
for j = 0, (num_y[i]-2) do
cls[nclient]:geometry(g)
nclient = nclient + 1
g.y = g.y + g.height+useless_gap + 2
to_remove = to_remove + 2
end
g.height = wa.height - num_y[i]*useless_gap - (num_y[i]-1)*g.height - useless_gap - to_remove
cls[nclient]:geometry(g)
nclient = nclient + 1
g.x = g.x+g.width+useless_gap + 2
end
end
end
return centerfair