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readme updated
[etc/awesome.git] / widgets / calendar.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2013, Luke Bonham                     
6                                                   
7 --]]
8
9 local icons_dir    = require("lain.helpers").icons_dir
10
11 local awful        = require("awful")
12 local beautiful    = require("beautiful")
13 local naughty      = require("naughty")
14
15 local io           = io
16 local os           = { date  = os.date }
17 local tonumber     = tonumber
18
19 local setmetatable = setmetatable
20
21 -- Calendar notification
22 -- lain.widgets.calendar
23 local calendar = {}
24 local notification = nil
25
26 local function create(background, foreground)
27     calendar.offset = 0
28     calendar.icons_dir = icons_dir .. "cal/white/" -- default
29     calendar.notify_icon = nil
30     calendar.font_size = 12
31     calendar.bg = background or beautiful.bg_normal or "#FFFFFF"
32     calendar.fg = foreground or beautiful.fg_normal or "#FFFFFF"
33 end
34
35 function calendar:hide()
36     if notification ~= nil then
37         naughty.destroy(notification)
38         notification = nil
39     end
40 end
41
42 function calendar:show(t_out, inc_offset)
43     calendar:hide()
44
45     local offs = inc_offset or 0
46     local tims = t_out or 0
47     local f, c_text
48     local today = tonumber(os.date('%d'))
49     local init_t = '/usr/bin/cal | sed -r -e "s/(^| )( '
50     -- let's take font only, font size is set in calendar table
51     local font = beautiful.font:sub(beautiful.font:find(""),
52                  beautiful.font:find(" "))
53
54     if offs == 0
55     then -- current month showing, today highlighted
56         if today >= 10
57         then
58            init_t = '/usr/bin/cal | sed -r -e "s/(^| )('
59         end
60
61         calendar.offset = 0
62         calendar.notify_icon = calendar.icons_dir .. today .. ".png"
63
64         -- bg and fg inverted to highlight today
65         f = io.popen( init_t .. today ..
66                       ')($| )/\\1<b><span foreground=\\"'
67                       .. calendar.bg ..
68                       '\\" background=\\"'
69                       .. calendar.fg ..
70                       '\\">\\2<\\/span><\\/b>\\3/"' )
71
72     else -- no current month showing, no day to highlight
73        local month = tonumber(os.date('%m'))
74        local year = tonumber(os.date('%Y'))
75
76        calendar.offset = calendar.offset + offs
77        month = month + calendar.offset
78
79        if month > 12 then
80            month = month % 12
81            year = year + 1
82            if month <= 0 then
83                month = 12
84            end
85        elseif month < 1 then
86            month = month + 12
87            year = year - 1
88            if month <= 0 then
89                month = 1
90            end
91        end
92
93        calendar.notify_icon = nil
94
95        f = io.popen('/usr/bin/cal ' .. month .. ' ' .. year)
96     end
97
98
99     c_text = "<tt><span font='" .. font .. " "
100              .. calendar.font_size .. "'><b>"
101              .. f:read() .. "</b>\n\n"
102              .. f:read() .. "\n"
103              .. f:read("*all"):gsub("\n*$", "")
104              .. "</span></tt>"
105     f:close()
106
107     notification = naughty.notify({ text = c_text,
108                                     icon = calendar.notify_icon,
109                                     fg = calendar.fg,
110                                     bg = calendar.bg,
111                                     timeout = tims })
112 end
113
114 function calendar:attach(widget, background, foreground)
115     create(background, foreground)
116     widget:connect_signal("mouse::enter", function () calendar:show() end)
117     widget:connect_signal("mouse::leave", function () calendar:hide() end)
118     widget:buttons(awful.util.table.join( awful.button({ }, 1, function ()
119                                               calendar:show(0, -1) end),
120                                           awful.button({ }, 3, function ()
121                                               calendar:show(0, 1) end) ))
122 end
123
124 return setmetatable(calendar, { __call = function(_, ...) return create(...) end })