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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