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merging with upstream
[etc/awesome.git] / layout / cascadetile.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 tonumber  = tonumber
14
15 local cascadetile =
16 {
17     name          = "cascadetile",
18     nmaster       = 0,
19     ncol          = 0,
20     mwfact        = 0,
21     offset_x      = 5,
22     offset_y      = 32,
23     extra_padding = 0
24 }
25
26 function cascadetile.arrange(p)
27
28     -- Layout with one fixed column meant for a master window. Its
29     -- width is calculated according to mwfact. Other clients are
30     -- cascaded or "tabbed" in a slave column on the right.
31
32     -- It's a bit hard to demonstrate the behaviour with ASCII-images...
33     --
34     --         (1)                 (2)                 (3)                 (4)
35     --   +----------+---+    +----------+---+    +----------+---+    +----------+---+
36     --   |          |   |    |          | 3 |    |          | 4 |    |         +---+|
37     --   |          |   | -> |          |   | -> |         +---++ -> |        +---+|+
38     --   |  1       | 2 |    |  1      +---++    |  1      | 3 ||    |  1    +---+|+|
39     --   |          |   |    |         | 2 ||    |        +---++|    |      +---+|+ |
40     --   |          |   |    |         |   ||    |        | 2 | |    |      | 2 |+  |
41     --   +----------+---+    +---------+---++    +--------+---+-+    +------+---+---+
42
43     -- A useless gap (like the dwm patch) can be defined with
44     -- beautiful.useless_gap_width.
45     local useless_gap = tonumber(beautiful.useless_gap_width) or 0
46     if useless_gap < 0 then useless_gap = 0 end
47
48     -- A global border can be defined with
49     -- beautiful.global_border_width
50     local global_border = tonumber(beautiful.global_border_width) or 0
51     if global_border < 0 then global_border = 0 end
52
53     -- Themes border width requires an offset
54     local bw = tonumber(beautiful.border_width) or 0
55
56     -- Screen.
57     local wa = p.workarea
58     local cls = p.clients
59
60     -- Borders are factored in.
61     wa.height = wa.height - ((global_border * 2) + (bw * 2))
62     wa.width = wa.width - ((global_border * 2) + (bw * 2))
63
64     -- Width of main column?
65     local t = tag.selected(p.screen)
66     local mwfact
67     if cascadetile.mwfact > 0
68     then
69         mwfact = cascadetile.mwfact
70     else
71         mwfact = tag.getmwfact(t)
72     end
73
74     -- Make slave windows overlap main window? Do this if ncol is 1.
75     local overlap_main
76     if cascadetile.ncol > 0
77     then
78         overlap_main = cascadetile.ncol
79     else
80         overlap_main = tag.getncol(t)
81     end
82
83     -- Minimum space for slave windows? See cascade.lua.
84     local num_c
85     if cascadetile.nmaster > 0
86     then
87         num_c = cascadetile.nmaster
88     else
89         num_c = tag.getnmaster(t)
90     end
91
92     local how_many = #cls - 1
93     if how_many < num_c
94     then
95         how_many = num_c
96     end
97     local current_offset_x = cascadetile.offset_x * (how_many - 1)
98     local current_offset_y = cascadetile.offset_y * (how_many - 1)
99
100     if #cls > 0
101     then
102         -- Main column, fixed width and height.
103         local c = cls[#cls]
104         local g = {}
105         local mainwid = wa.width * mwfact
106         local slavewid = wa.width - mainwid
107
108         if overlap_main == 1
109         then
110             g.width = wa.width
111
112             -- The size of the main window may be reduced a little bit.
113             -- This allows you to see if there are any windows below the
114             -- main window.
115             -- This only makes sense, though, if the main window is
116             -- overlapping everything else.
117             g.width = g.width - cascadetile.extra_padding
118         else
119             g.width = mainwid
120         end
121
122         g.height = wa.height
123         g.x = wa.x + global_border
124         g.y = wa.y + global_border
125         if useless_gap > 0
126         then
127             -- Reduce width once and move window to the right. Reduce
128             -- height twice, however.
129             g.width = g.width - useless_gap
130             g.height = g.height - 2 * useless_gap
131             g.x = g.x + useless_gap
132             g.y = g.y + useless_gap
133
134             -- When there's no window to the right, add an additional
135             -- gap.
136             if overlap_main == 1
137             then
138                 g.width = g.width - useless_gap
139             end
140         end
141         c:geometry(g)
142
143         -- Remaining clients stacked in slave column, new ones on top.
144         if #cls > 1
145         then
146             for i = (#cls - 1),1,-1
147             do
148                 c = cls[i]
149                 g = {}
150                 g.width = slavewid - current_offset_x
151                 g.height = wa.height - current_offset_y
152                 g.x = wa.x + mainwid + (how_many - i) * cascadetile.offset_x
153                 g.y = wa.y + (i - 1) * cascadetile.offset_y + global_border
154                 if useless_gap > 0
155                 then
156                     g.width = g.width - 2 * useless_gap
157                     g.height = g.height - 2 * useless_gap
158                     g.x = g.x + useless_gap
159                     g.y = g.y + useless_gap
160                 end
161                 c:geometry(g)
162             end
163         end
164     end
165 end
166
167 return cascadetile