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