-
---[[
-
- 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
-
- -- Screen.
- local wa = p.workarea
- local cls = p.clients
-
- -- Borders are factored in.
- wa.height = wa.height - (global_border * 2)
- wa.width = wa.width - (global_border * 2)
- wa.x = wa.x + global_border
- wa.y = wa.y + global_border
-
- -- 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
-
- local width = math.floor((wa.width - (num_x + 1)*useless_gap) / num_x)
-
- if #cls < num_x
- then
- -- Less clients than the number of columns, let's center it!
- local offset_x = wa.x + (wa.width - #cls*width - (#cls - 1)*useless_gap) / 2
- local g = {}
- g.y = wa.y + useless_gap
- for i = 1, #cls do
- local c = cls[i]
- g.width = width - 2*c.border_width
- g.height = wa.height - 2*useless_gap - 2*c.border_width
- if g.width < 1 then g.width = 1 end
- if g.height < 1 then g.height = 1 end
- g.x = offset_x + (i - 1) * (width + useless_gap)
- c:geometry(g)
- end
- else
- -- More clients than the number of columns, let's arrange it!
- -- Master client deserves a special treatement
- local c = cls[1]
- local g = {}
- g.width = wa.width - (num_x - 1)*width - (num_x + 1)*useless_gap - 2*c.border_width
- g.height = wa.height - 2*useless_gap - 2*c.border_width
- if g.width < 1 then g.width = 1 end
- if g.height < 1 then g.height = 1 end
- g.x = wa.x + useless_gap
- g.y = wa.y + useless_gap
-
- c:geometry(g)
-
- -- 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 -- we start with the 2nd client
- g.x = g.x + g.width + useless_gap + 2*c.border_width
-
- for i = 1, (num_x-1) do
- local height = math.floor((wa.height - (num_y[i] + 1)*useless_gap) / num_y[i])
- g.y = wa.y + useless_gap
- for j = 0, (num_y[i]-2) do
- local c = cls[nclient]
- g.height = height - 2*c.border_width
- g.width = width - 2*c.border_width
- if g.width < 1 then g.width = 1 end
- if g.height < 1 then g.height = 1 end
- c:geometry(g)
- nclient = nclient + 1
- g.y = g.y + height + useless_gap
- end
- local c = cls[nclient]
- g.height = wa.height - (num_y[i] + 1)*useless_gap - (num_y[i] - 1)*height - 2*c.border_width
- g.width = width - 2*c.border_width
- if g.width < 1 then g.width = 1 end
- if g.height < 1 then g.height = 1 end
- c:geometry(g)
- nclient = nclient + 1
- g.x = g.x + width + useless_gap
- end
- end
-end
-
-return centerfair