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[etc/awesome.git] / layout / termfair.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2014,      projektile                 
6       * (c) 2013,      Luke Bonham                
7       * (c) 2010-2012, Peter Hofmann              
8                                                   
9 --]]
10
11 local tag       = require("awful.tag")
12 local beautiful = require("beautiful")
13 local math      = { ceil  = math.ceil,
14                     floor = math.floor,
15                     max   = math.max }
16 local tonumber  = tonumber
17
18 local termfair  = { name = "termfair" }
19
20 function termfair.arrange(p)
21     -- Layout with fixed number of vertical columns (read from nmaster).
22     -- New windows align from left to right. When a row is full, a now
23     -- one above it is created. Like this:
24
25     --        (1)                (2)                (3)
26     --   +---+---+---+      +---+---+---+      +---+---+---+
27     --   |   |   |   |      |   |   |   |      |   |   |   |
28     --   | 1 |   |   |  ->  | 2 | 1 |   |  ->  | 3 | 2 | 1 |  ->
29     --   |   |   |   |      |   |   |   |      |   |   |   |
30     --   +---+---+---+      +---+---+---+      +---+---+---+
31
32     --        (4)                (5)                (6)
33     --   +---+---+---+      +---+---+---+      +---+---+---+
34     --   | 4 |   |   |      | 5 | 4 |   |      | 6 | 5 | 4 |
35     --   +---+---+---+  ->  +---+---+---+  ->  +---+---+---+
36     --   | 3 | 2 | 1 |      | 3 | 2 | 1 |      | 3 | 2 | 1 |
37     --   +---+---+---+      +---+---+---+      +---+---+---+
38
39     -- A useless gap (like the dwm patch) can be defined with
40     -- beautiful.useless_gap_width.
41     local useless_gap = tonumber(beautiful.useless_gap_width) or 0
42     if useless_gap < 0 then useless_gap = 0 end
43
44     -- A global border can be defined with
45     -- beautiful.global_border_width
46     local global_border = tonumber(beautiful.global_border_width) or 0
47     if global_border < 0 then global_border = 0 end
48
49     -- Themes border width requires an offset
50     local bw = tonumber(beautiful.border_width) or 0
51
52     -- Screen.
53     local wa = p.workarea
54     local cls = p.clients
55
56     -- Borders are factored in.
57     wa.height = wa.height - ((global_border * 2) + (bw * 2))
58     wa.width = wa.width - ((global_border * 2) + (bw * 2))
59
60     -- How many vertical columns?
61     local t = tag.selected(p.screen)
62     local num_x = termfair.nmaster or tag.getnmaster(t)
63
64     -- Do at least "desired_y" rows.
65     local desired_y = termfair.ncol or tag.getncol(t)
66
67     if #cls > 0
68     then
69         local num_y = math.max(math.ceil(#cls / num_x), desired_y)
70         local cur_num_x = num_x
71         local at_x = 0
72         local at_y = 0
73         local remaining_clients = #cls
74         local width = math.floor(wa.width / num_x)
75         local height = math.floor(wa.height / num_y)
76
77         -- We start the first row. Left-align by limiting the number of
78         -- available slots.
79         if remaining_clients < num_x
80         then
81             cur_num_x = remaining_clients
82         end
83
84         -- Iterate in reversed order.
85         for i = #cls,1,-1
86         do
87             -- Get x and y position.
88             local c = cls[i]
89             local this_x = cur_num_x - at_x - 1
90             local this_y = num_y - at_y - 1
91
92             -- Calc geometry.
93             local g = {}
94             if this_x == (num_x - 1)
95             then
96                 g.width = wa.width - (num_x - 1) * width - useless_gap
97             else
98                 g.width = width - useless_gap
99             end
100             if this_y == (num_y - 1)
101             then
102                 g.height = wa.height - (num_y - 1) * height - useless_gap
103             else
104                 g.height = height - useless_gap
105             end
106
107             g.x = wa.x + this_x * width + global_border
108             g.y = wa.y + this_y * height + global_border
109
110             if useless_gap > 0
111             then
112                 -- All clients tile evenly.
113                 g.x = g.x + (useless_gap / 2)
114                 g.y = g.y + (useless_gap / 2)
115
116             end
117             c:geometry(g)
118             remaining_clients = remaining_clients - 1
119
120             -- Next grid position.
121             at_x = at_x + 1
122             if at_x == num_x
123             then
124                 -- Row full, create a new one above it.
125                 at_x = 0
126                 at_y = at_y + 1
127
128                 -- We start a new row. Left-align.
129                 if remaining_clients < num_x
130                 then
131                     cur_num_x = remaining_clients
132                 end
133             end
134         end
135     end
136 end
137
138 return termfair