mirror of https://github.com/lcpz/lain.git
238 lines
8.2 KiB
Lua
238 lines
8.2 KiB
Lua
--[[
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Licensed under GNU General Public License v2
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* (c) 2014, projektile
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* (c) 2013, Luca CPZ
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* (c) 2010, Nicolas Estibals
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* (c) 2010-2012, Peter Hofmann
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--]]
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local math = math
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local screen = screen
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local tonumber = tonumber
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local termfair = { name = "termfair" }
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termfair.center = { name = "centerfair" }
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local function do_fair(p, orientation)
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local t = p.tag or screen[p.screen].selected_tag
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local wa = p.workarea
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local cls = p.clients
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if #cls == 0 then return end
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if orientation == "west" then
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-- Layout with fixed number of vertical columns (read from nmaster).
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-- New windows align from left to right. When a row is full, a now
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-- one above it is created. Like this:
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-- (1) (2) (3)
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-- +---+---+---+ +---+---+---+ +---+---+---+
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-- | | | | | | | | | | | |
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-- | 1 | | | -> | 2 | 1 | | -> | 3 | 2 | 1 | ->
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-- | | | | | | | | | | | |
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-- +---+---+---+ +---+---+---+ +---+---+---+
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-- (4) (5) (6)
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-- +---+---+---+ +---+---+---+ +---+---+---+
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-- | 4 | | | | 5 | 4 | | | 6 | 5 | 4 |
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-- +---+---+---+ -> +---+---+---+ -> +---+---+---+
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-- | 3 | 2 | 1 | | 3 | 2 | 1 | | 3 | 2 | 1 |
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-- +---+---+---+ +---+---+---+ +---+---+---+
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-- How many vertical columns? Read from nmaster on the tag.
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local num_x = tonumber(termfair.nmaster) or t.master_count
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local ncol = tonumber(termfair.ncol) or t.column_count
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if num_x <= 2 then num_x = 2 end
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if ncol <= 1 then ncol = 1 end
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local width = math.floor(wa.width/num_x)
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local num_y = math.max(math.ceil(#cls / num_x), ncol)
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local height = math.floor(wa.height/num_y)
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local cur_num_x = num_x
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local at_x = 0
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local at_y = 0
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local remaining_clients = #cls
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-- We start the first row. Left-align by limiting the number of
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-- available slots.
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if remaining_clients < num_x then
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cur_num_x = remaining_clients
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end
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-- Iterate in reversed order.
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for i = #cls,1,-1 do
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-- Get x and y position.
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local c = cls[i]
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local this_x = cur_num_x - at_x - 1
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local this_y = num_y - at_y - 1
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-- Calculate geometry.
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local g = {}
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if this_x == (num_x - 1) then
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g.width = wa.width - (num_x - 1)*width
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else
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g.width = width
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end
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if this_y == (num_y - 1) then
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g.height = wa.height - (num_y - 1)*height
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else
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g.height = height
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end
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g.x = wa.x + this_x*width
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g.y = wa.y + this_y*height
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if g.width < 1 then g.width = 1 end
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if g.height < 1 then g.height = 1 end
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p.geometries[c] = g
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remaining_clients = remaining_clients - 1
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-- Next grid position.
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at_x = at_x + 1
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if at_x == num_x then
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-- Row full, create a new one above it.
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at_x = 0
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at_y = at_y + 1
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-- We start a new row. Left-align.
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if remaining_clients < num_x then
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cur_num_x = remaining_clients
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end
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end
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end
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elseif orientation == "center" then
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-- Layout with fixed number of vertical columns (read from nmaster).
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-- Cols are centerded until there is nmaster columns, then windows
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-- are stacked in the slave columns, with at most ncol clients per
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-- column if possible.
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-- with nmaster=3 and ncol=1 you'll have
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-- (1) (2) (3)
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-- +---+---+---+ +-+---+---+-+ +---+---+---+
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-- | | | | | | | | | | | | |
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-- | | 1 | | -> | | 1 | 2 | | -> | 1 | 2 | 3 | ->
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-- | | | | | | | | | | | | |
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-- +---+---+---+ +-+---+---+-+ +---+---+---+
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-- (4) (5)
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-- +---+---+---+ +---+---+---+
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-- | | | 3 | | | 2 | 4 |
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-- + 1 + 2 +---+ -> + 1 +---+---+
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-- | | | 4 | | | 3 | 5 |
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-- +---+---+---+ +---+---+---+
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-- How many vertical columns? Read from nmaster on the tag.
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local num_x = tonumber(termfair.center.nmaster) or t.master_count
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local ncol = tonumber(termfair.center.ncol) or t.column_count
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if num_x <= 2 then num_x = 2 end
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if ncol <= 1 then ncol = 1 end
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local width = math.floor(wa.width / num_x)
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if #cls < num_x then
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-- Less clients than the number of columns, let's center it!
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local offset_x = wa.x + (wa.width - #cls*width) / 2
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for i = 1, #cls do
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local g = { y = wa.y }
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g.width = width
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g.height = wa.height
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if g.width < 1 then g.width = 1 end
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if g.height < 1 then g.height = 1 end
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g.x = offset_x + (i - 1) * width
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p.geometries[cls[i]] = g
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end
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else
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-- More clients than the number of columns, let's arrange it!
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-- Master client deserves a special treatement
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local g = {}
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g.width = wa.width - (num_x - 1)*width
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g.height = wa.height
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if g.width < 1 then g.width = 1 end
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if g.height < 1 then g.height = 1 end
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g.x = wa.x
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g.y = wa.y
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p.geometries[cls[1]] = g
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-- Treat the other clients
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-- Compute distribution of clients among columns
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local num_y = {}
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local remaining_clients = #cls-1
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local ncol_min = math.ceil(remaining_clients/(num_x-1))
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if ncol >= ncol_min then
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for i = (num_x-1), 1, -1 do
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if (remaining_clients-i+1) < ncol then
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num_y[i] = remaining_clients-i + 1
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else
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num_y[i] = ncol
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end
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remaining_clients = remaining_clients - num_y[i]
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end
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else
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local rem = remaining_clients % (num_x-1)
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if rem == 0 then
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for i = 1, num_x-1 do
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num_y[i] = ncol_min
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end
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else
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for i = 1, num_x-1 do
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num_y[i] = ncol_min - 1
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end
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for i = 0, rem-1 do
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num_y[num_x-1-i] = num_y[num_x-1-i] + 1
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end
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end
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end
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-- Compute geometry of the other clients
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local nclient = 2 -- we start with the 2nd client
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local wx = g.x + g.width
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for i = 1, (num_x-1) do
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local height = math.floor(wa.height / num_y[i])
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local wy = wa.y
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for j = 0, (num_y[i]-2) do
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local g = {}
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g.x = wx
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g.y = wy
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g.height = height
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g.width = width
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if g.width < 1 then g.width = 1 end
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if g.height < 1 then g.height = 1 end
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p.geometries[cls[nclient]] = g
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nclient = nclient + 1
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wy = wy + height
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end
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local g = {}
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g.x = wx
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g.y = wy
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g.height = wa.height - (num_y[i] - 1)*height
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g.width = width
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if g.width < 1 then g.width = 1 end
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if g.height < 1 then g.height = 1 end
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p.geometries[cls[nclient]] = g
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nclient = nclient + 1
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wx = wx + width
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end
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end
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end
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end
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function termfair.center.arrange(p)
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return do_fair(p, "center")
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end
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function termfair.arrange(p)
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return do_fair(p, "west")
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end
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return termfair
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