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#290 forgot fs
[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,      Nicolas Estibals           
8       * (c) 2010-2012, Peter Hofmann              
9                                                   
10 --]]
11
12 local tag      = require("awful.tag")
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 termfair.center = { name = "centerfair" }
20
21 local function do_fair(p, orientation)
22     -- Screen.
23     local wa  = p.workarea
24     local cls = p.clients
25
26     if #cls <= 0 then return end
27
28     -- Useless gaps.
29     local useless_gap = p.useless_gap or 0
30
31     if orientation == "west" then
32         -- Layout with fixed number of vertical columns (read from nmaster).
33         -- New windows align from left to right. When a row is full, a now
34         -- one above it is created. Like this:
35
36         --        (1)                (2)                (3)
37         --   +---+---+---+      +---+---+---+      +---+---+---+
38         --   |   |   |   |      |   |   |   |      |   |   |   |
39         --   | 1 |   |   |  ->  | 2 | 1 |   |  ->  | 3 | 2 | 1 |  ->
40         --   |   |   |   |      |   |   |   |      |   |   |   |
41         --   +---+---+---+      +---+---+---+      +---+---+---+
42
43         --        (4)                (5)                (6)
44         --   +---+---+---+      +---+---+---+      +---+---+---+
45         --   | 4 |   |   |      | 5 | 4 |   |      | 6 | 5 | 4 |
46         --   +---+---+---+  ->  +---+---+---+  ->  +---+---+---+
47         --   | 3 | 2 | 1 |      | 3 | 2 | 1 |      | 3 | 2 | 1 |
48         --   +---+---+---+      +---+---+---+      +---+---+---+
49
50         if #cls <= 0 then return end
51
52         -- How many vertical columns? Read from nmaster on the tag.
53         local num_x = tonumber(termfair.nmaster) or tag.master_count
54         local ncol  = tonumber(termfair.ncol) or tag.column_count
55         local width = math.floor((wa.width - (num_x + 1)*useless_gap) / num_x)
56
57         if num_x <= 2 then num_x = 2 end
58         if ncol  <= 1 then ncol  = 1 end
59
60         local num_y     = math.max(math.ceil(#cls / num_x), ncol)
61         local height    = math.floor((wa.height - (num_y + 1)*useless_gap) / num_y)
62         local cur_num_x = num_x
63         local at_x      = 0
64         local at_y      = 0
65
66         local remaining_clients = #cls
67
68         -- We start the first row. Left-align by limiting the number of
69         -- available slots.
70         if remaining_clients < num_x then
71             cur_num_x = remaining_clients
72         end
73
74         -- Iterate in reversed order.
75         for i = #cls,1,-1 do
76             -- Get x and y position.
77             local c = cls[i]
78             local this_x = cur_num_x - at_x - 1
79             local this_y = num_y - at_y - 1
80
81             -- Calculate geometry.
82             local g = {}
83             if this_x == (num_x - 1) then
84                 g.width = wa.width - (num_x - 1)*width - (num_x + 1)*useless_gap - 2*c.border_width
85             else
86                 g.width = width - 2*c.border_width
87             end
88
89             if this_y == (num_y - 1) then
90                 g.height = wa.height - (num_y - 1)*height - (num_y + 1)*useless_gap - 2*c.border_width
91             else
92                 g.height = height - 2*c.border_width
93             end
94
95             g.x = wa.x + this_x*width
96             g.y = wa.y + this_y*height
97
98             if useless_gap > 0 then
99                 -- All clients tile evenly.
100                 g.x = g.x + (this_x + 1)*useless_gap
101                 g.y = g.y + (this_y + 1)*useless_gap
102             end
103
104             if g.width < 1 then g.width = 1 end
105             if g.height < 1 then g.height = 1 end
106
107             c:geometry(g)
108
109             remaining_clients = remaining_clients - 1
110
111             -- Next grid position.
112             at_x = at_x + 1
113             if at_x == num_x then
114                 -- Row full, create a new one above it.
115                 at_x = 0
116                 at_y = at_y + 1
117
118                 -- We start a new row. Left-align.
119                 if remaining_clients < num_x then
120                     cur_num_x = remaining_clients
121                 end
122             end
123         end
124     elseif orientation == "center" then
125         -- Layout with fixed number of vertical columns (read from nmaster).
126         -- Cols are centerded until there is nmaster columns, then windows
127         -- are stacked in the slave columns, with at most ncol clients per
128         -- column if possible.
129
130         -- with nmaster=3 and ncol=1 you'll have
131         --        (1)                (2)                (3)
132         --   +---+---+---+      +-+---+---+-+      +---+---+---+
133         --   |   |   |   |      | |   |   | |      |   |   |   |
134         --   |   | 1 |   |  ->  | | 1 | 2 | | ->   | 1 | 2 | 3 |  ->
135         --   |   |   |   |      | |   |   | |      |   |   |   |
136         --   +---+---+---+      +-+---+---+-+      +---+---+---+
137
138         --        (4)                (5)
139         --   +---+---+---+      +---+---+---+
140         --   |   |   | 3 |      |   | 2 | 4 |
141         --   + 1 + 2 +---+  ->  + 1 +---+---+
142         --   |   |   | 4 |      |   | 3 | 5 |
143         --   +---+---+---+      +---+---+---+
144
145         -- How many vertical columns? Read from nmaster on the tag.
146         local num_x = tonumber(termfair.center.nmaster) or tag.master_count
147         local ncol  = tonumber(termfair.center.ncol) or tag.column_count
148         local width = math.floor((wa.width - (num_x + 1)*useless_gap) / num_x)
149
150         if num_x <= 2 then num_x = 2 end
151         if ncol  <= 1 then ncol  = 1 end
152
153         if #cls < num_x then
154             -- Less clients than the number of columns, let's center it!
155             local offset_x = wa.x + (wa.width - #cls*width - (#cls - 1)*useless_gap) / 2
156             local g = {}
157             g.y = wa.y + useless_gap
158             for i = 1, #cls do
159                 local c = cls[i]
160                 g.width = width - 2*c.border_width
161                 g.height = wa.height - 2*useless_gap - 2*c.border_width
162                 if g.width < 1 then g.width = 1 end
163                 if g.height < 1 then g.height = 1 end
164                 g.x = offset_x + (i - 1) * (width + useless_gap)
165                 c:geometry(g)
166             end
167         else
168             -- More clients than the number of columns, let's arrange it!
169             -- Master client deserves a special treatement
170             local c = cls[1]
171             local g = {}
172             g.width = wa.width - (num_x - 1)*width - (num_x + 1)*useless_gap - 2*c.border_width
173             g.height = wa.height - 2*useless_gap - 2*c.border_width
174             if g.width < 1 then g.width = 1 end
175             if g.height < 1 then g.height = 1 end
176             g.x = wa.x + useless_gap
177             g.y = wa.y + useless_gap
178
179             c:geometry(g)
180
181             -- Treat the other clients
182
183             -- Compute distribution of clients among columns
184             local num_y ={}
185             do
186                 local remaining_clients = #cls-1
187                 local ncol_min = math.ceil(remaining_clients/(num_x-1))
188                 if ncol >= ncol_min then
189                     for i = (num_x-1), 1, -1 do
190                         if (remaining_clients-i+1) < ncol then
191                             num_y[i] = remaining_clients-i + 1
192                         else
193                             num_y[i] = ncol
194                         end
195                         remaining_clients = remaining_clients - num_y[i]
196                     end
197                 else
198                     local rem = remaining_clients % (num_x-1)
199                     if rem == 0 then
200                         for i = 1, num_x-1 do
201                             num_y[i] = ncol_min
202                         end
203                     else
204                         for i = 1, num_x-1 do
205                             num_y[i] = ncol_min - 1
206                         end
207                         for i = 0, rem-1 do
208                             num_y[num_x-1-i] = num_y[num_x-1-i] + 1
209                         end
210                     end
211                 end
212             end
213
214             -- Compute geometry of the other clients
215             local nclient = 2 -- we start with the 2nd client
216             g.x = g.x + g.width + useless_gap + 2*c.border_width
217
218             for i = 1, (num_x-1) do
219                 local height = math.floor((wa.height - (num_y[i] + 1)*useless_gap) / num_y[i])
220                 g.y = wa.y + useless_gap
221                 for j = 0, (num_y[i]-2) do
222                     local c = cls[nclient]
223                     g.height = height - 2*c.border_width
224                     g.width = width - 2*c.border_width
225                     if g.width < 1 then g.width = 1 end
226                     if g.height < 1 then g.height = 1 end
227                     c:geometry(g)
228                     nclient = nclient + 1
229                     g.y = g.y + height + useless_gap
230                 end
231                 local c = cls[nclient]
232                 g.height = wa.height - (num_y[i] + 1)*useless_gap - (num_y[i] - 1)*height - 2*c.border_width
233                 g.width = width - 2*c.border_width
234                 if g.width < 1 then g.width = 1 end
235                 if g.height < 1 then g.height = 1 end
236                 c:geometry(g)
237                 nclient = nclient + 1
238                 g.x = g.x + width + useless_gap
239             end
240         end
241     end
242 end
243
244 function termfair.center.arrange(p)
245     return do_fair(p, "center")
246 end
247
248 function termfair.arrange(p)
249     return do_fair(p, "west")
250 end
251
252 return termfair