--- /dev/null
+
+--[[
+
+ Licensed under GNU General Public License v2
+ * (c) 2016, Henrik Antonsson
+ * (c) 2015, Joerg Jaspert
+ * (c) 2014, projektile
+ * (c) 2013, Luke Bonham
+ * (c) 2010-2012, Peter Hofmann
+
+--]]
+
+local floor = math.floor
+local screen = screen
+
+local centerwork = {
+ name = "centerwork",
+ horizontal = { name = "centerworkh" }
+}
+
+local function do_centerwork(p, orientation)
+ local t = p.tag or screen[p.screen].selected_tag
+ local wa = p.workarea
+ local cls = p.clients
+
+ if #cls == 0 then return end
+
+ local c = cls[1]
+ local g = {}
+
+ -- Main column, fixed width and height.
+ local mwfact = t.master_width_factor
+ local mainhei = floor(wa.height * mwfact)
+ local mainwid = floor(wa.width * mwfact)
+ local slavewid = wa.width - mainwid
+ local slaveLwid = floor(slavewid / 2)
+ local slaveRwid = slavewid - slaveLwid
+ local slavehei = wa.height - mainhei
+ local slaveThei = floor(slavehei / 2)
+ local slaveBhei = slavehei - slaveThei
+ local nbrFirstSlaves = floor(#cls / 2)
+ local nbrSecondSlaves = floor((#cls - 1) / 2)
+
+ local slaveFirstDim, slaveSecondDim = 0, 0
+
+ if orientation == "vertical" then
+ if nbrFirstSlaves > 0 then slaveFirstDim = floor(wa.height / nbrFirstSlaves) end
+ if nbrSecondSlaves > 0 then slaveSecondDim = floor(wa.height / nbrSecondSlaves) end
+
+ g.height = wa.height
+ g.width = mainwid
+
+ g.x = wa.x + slaveLwid
+ g.y = wa.y
+ else
+ if nbrFirstSlaves > 0 then slaveFirstDim = floor(wa.width / nbrFirstSlaves) end
+ if nbrSecondSlaves > 0 then slaveSecondDim = floor(wa.width / nbrSecondSlaves) end
+
+ g.height = mainhei
+ g.width = wa.width
+
+ g.x = wa.x
+ g.y = wa.y + slaveThei
+ end
+
+ if g.width < 1 then g.width = 1 end
+ if g.height < 1 then g.height = 1 end
+
+ p.geometries[c] = g
+
+ -- Auxiliary windows.
+ if #cls <= 1 then return end
+ for i = 2,#cls do
+ local c = cls[i]
+ local g = {}
+
+ local rowIndex = floor(i/2)
+
+ if orientation == "vertical" then
+ if i % 2 == 0 then
+ -- left slave
+ g.x = wa.x
+ g.y = wa.y + (rowIndex-1)*slaveFirstDim
+
+ g.width = slaveLwid
+
+ -- if last slave in left row use remaining space for that slave
+ if rowIndex == nbrFirstSlaves then
+ g.height = wa.y + wa.height - g.y
+ else
+ g.height = slaveFirstDim
+ end
+ else
+ -- right slave
+ g.x = wa.x + slaveLwid + mainwid
+ g.y = wa.y + (rowIndex-1)*slaveSecondDim
+
+ g.width = slaveRwid
+
+ -- if last slave in right row use remaining space for that slave
+ if rowIndex == nbrSecondSlaves then
+ g.height = wa.y + wa.height - g.y
+ else
+ g.height = slaveSecondDim
+ end
+ end
+ else
+ if i % 2 == 0 then
+ -- top slave
+ g.x = wa.x + (rowIndex-1)*slaveFirstDim
+ g.y = wa.y
+
+ g.height = slaveThei
+
+ -- if last slave in top row use remaining space for that slave
+ if rowIndex == nbrFirstSlaves then
+ g.width = wa.x + wa.width - g.x
+ else
+ g.width = slaveFirstDim
+ end
+ else
+ -- bottom slave
+ g.x = wa.x + (rowIndex-1)*slaveSecondDim
+ g.y = wa.y + slaveThei + mainhei
+
+ g.height = slaveBhei
+
+ -- if last slave in bottom row use remaining space for that slave
+ if rowIndex == nbrSecondSlaves then
+ g.width = wa.x + wa.width - g.x
+ else
+ g.width = slaveSecondDim
+ end
+
+ end
+ end
+
+ if g.width < 1 then g.width = 1 end
+ if g.height < 1 then g.height = 1 end
+
+ p.geometries[c] = g
+ end
+end
+
+
+function centerwork.horizontal.arrange(p)
+ return do_centerwork(p, "horizontal")
+end
+
+function centerwork.arrange(p)
+ return do_centerwork(p, "vertical")
+end
+
+return centerwork