diff options
Diffstat (limited to 'lain/layout/centerfair.lua')
| -rw-r--r-- | lain/layout/centerfair.lua | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/lain/layout/centerfair.lua b/lain/layout/centerfair.lua new file mode 100644 index 0000000..1e8915d --- /dev/null +++ b/lain/layout/centerfair.lua @@ -0,0 +1,163 @@ + +--[[ + + 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 + + -- Themes border width requires an offset + local bw = tonumber(beautiful.border_width) or 0 + + -- Screen. + local wa = p.workarea + local cls = p.clients + + -- Borders are factored in. + wa.height = wa.height - ((global_border * 2) + (bw * 2)) + wa.width = wa.width - ((global_border * 2) + (bw * 2)) + + -- 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) + + local offset_y = wa.y + useless_gap + if #cls < num_x + then + -- Less clients than the number of columns, let's center it! + local offset_x = wa.x + useless_gap + (wa.width - #cls*width - (#cls+1)*useless_gap) / 2 + local g = {} + g.width = width + g.height = wa.height - 2*useless_gap - 2 + g.y = offset_y + global_border + for i = 1, #cls do + g.x = offset_x + (#cls - i) * (width + useless_gap + 2) + global_border + cls[i]:geometry(g) + end + else + -- More clients than the number of columns, let's arrange it! + local offset_x = wa.x + if useless_gap > 0 then + offset_x = offset_x + end + + -- Master client deserves a special treatement + local g = {} + g.width = wa.width - (num_x - 1) * width - num_x * 2*useless_gap - 2 + g.height = wa.height - 2*useless_gap - 2 + g.x = offset_x + useless_gap + global_border + g.y = offset_y + global_border + + cls[#cls]: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 = #cls-1 -- we start with the 2nd client + g.x = g.x + g.width+useless_gap + 2 + g.width = width + + if useless_gap > 0 then + g.width = g.width + useless_gap - 2 + end + + for i = 1, (num_x-1) do + to_remove = 2 + g.height = math.floor((wa.height - (num_y[i] * useless_gap)) / num_y[i]) + g.y = offset_y + global_border + for j = 0, (num_y[i]-2) do + cls[nclient]:geometry(g) + nclient = nclient - 1 + g.y = g.y + g.height+useless_gap + 2 + to_remove = to_remove + 2 + end + g.height = wa.height - num_y[i]*useless_gap - (num_y[i]-1)*g.height - useless_gap - to_remove + cls[nclient]:geometry(g) + nclient = nclient - 1 + g.x = g.x+g.width+useless_gap + 2 + end + end +end + +return centerfair |