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[etc/awesome.git] / layout / uselesspiral.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2013,      Luke Bonham                
6       * (c) 2009       Uli Schlachter             
7       * (c) 2008       Julien Danjolu             
8                                                   
9 --]]
10
11 local beautiful = require("beautiful")
12 local ipairs    = ipairs
13 local tonumber  = tonumber
14
15 local uselesspiral = {}
16
17 local function spiral(p, spiral)
18     -- A useless gap (like the dwm patch) can be defined with
19     -- beautiful.useless_gap_width.
20     local useless_gap = tonumber(beautiful.useless_gap_width) or 0
21
22     local wa = p.workarea
23     local cls = p.clients
24     local n = #cls
25
26     local static_wa = wa
27
28     for k, c in ipairs(cls) do
29         if k < n then
30             if k % 2 == 0 then
31                 wa.height = wa.height / 2
32             else
33                 wa.width = wa.width / 2
34             end
35         end
36
37         if k % 4 == 0 and spiral then
38             wa.x = wa.x - wa.width
39         elseif k % 2 == 0 or
40             (k % 4 == 3 and k < n and spiral) then
41             wa.x = wa.x + wa.width
42         end
43
44         if k % 4 == 1 and k ~= 1 and spiral then
45             wa.y = wa.y - wa.height
46         elseif k % 2 == 1 and k ~= 1 or
47             (k % 4 == 0 and k < n and spiral) then
48             wa.y = wa.y + wa.height
49         end
50
51             local wa2 = {}
52             wa2.x = wa.x
53             wa2.y = wa.y
54             wa2.height = wa.height
55             wa2.width = wa.width
56
57         -- Useless gap.
58         if useless_gap > 0
59         then
60             -- Top and left clients are shrinked by two steps and
61             -- get moved away from the border. Other clients just
62             -- get shrinked in one direction.
63
64             top = false
65             left = false
66
67             if wa2.y == static_wa.y then
68                top = true
69             end
70
71             if wa2.x == static_wa.x then
72                left = true
73             end
74
75             if top then
76                 wa2.height = wa2.height - 2 * useless_gap
77                 wa2.y = wa2.y + useless_gap
78             else
79                 wa2.height = wa2.height - useless_gap
80             end
81
82             if left then
83                 wa2.width = wa2.width - 2 * useless_gap
84                 wa2.x = wa2.x + useless_gap
85             else
86                 wa2.width = wa2.width - useless_gap
87             end
88         end
89         -- End of useless gap.
90
91         c:geometry(wa2)
92     end
93 end
94
95 --- Dwindle layout
96 uselesspiral.dwindle = {}
97 uselesspiral.dwindle.name = "uselessdwindle"
98 function uselesspiral.dwindle.arrange(p)
99     return spiral(p, false)
100 end
101
102 --- Spiral layout
103 uselesspiral.name = "uselesspiral"
104 function uselesspiral.arrange(p)
105     return spiral(p, true)
106 end
107
108 return uselesspiral