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cal: asynchronous
[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 async        = require("lain.helpers").async
10 local icons_dir    = require("lain.helpers").icons_dir
11 local markup       = require("lain.util.markup")
12 local awful        = require("awful")
13 local naughty      = require("naughty")
14 local os           = { date   = os.date }
15 local string       = { format = string.format,
16                        gsub   = string.gsub }
17 local tonumber     = tonumber
18 local setmetatable = setmetatable
19
20 -- Calendar notification
21 -- lain.widgets.calendar
22 local calendar = { offset = 0 }
23
24 function calendar.hide()
25     if not calendar.notification then return end
26     naughty.destroy(calendar.notification)
27     calendar.notification = nil
28 end
29
30 function calendar.show(t_out, inc_offset, scr)
31     calendar.hide()
32
33     local today = os.date("%d")
34     local offs = inc_offset or 0
35     local f
36
37     calendar.offset = calendar.offset + offs
38
39     local current_month = (offs == 0 or calendar.offset == 0)
40
41     if current_month then -- today highlighted
42         calendar.offset = 0
43         calendar.notify_icon = string.format("%s%s.png", calendar.icons, today)
44         f = calendar.cal
45     else -- no current month showing, no day to highlight
46        local month = tonumber(os.date("%m"))
47        local year  = tonumber(os.date("%Y"))
48
49        month = month + calendar.offset
50
51        while month > 12 do
52            month = month - 12
53            year = year + 1
54        end
55
56        while month < 1 do
57            month = month + 12
58            year = year - 1
59        end
60
61        calendar.notify_icon = nil
62        f = string.format("%s %s %s", calendar.cal, month, year)
63     end
64
65     if calendar.followtag then
66         calendar.notification_preset.screen = awful.screen.focused()
67     else
68         calendar.notification_preset.screen = src or 1
69     end
70
71     async(string.format("%s -c '%s'", awful.util.shell, f), function(ws)
72         fg, bg = calendar.notification_preset.fg, calendar.notification_preset.bg
73         ws = ws:gsub("%c%[7m%d+%c%[27m", markup.bold(markup.color(bg, fg, today)))
74         calendar.notification = naughty.notify({
75             preset  = calendar.notification_preset,
76             text    = ws:gsub("\n*$", ""),
77             icon    = calendar.notify_icon,
78             timeout = t_out or calendar.notification.preset.timeout or 5
79         })
80     end)
81 end
82
83 function calendar.attach(widget, args)
84     local args                   = args or {}
85     calendar.cal                 = args.cal or "/usr/bin/cal --color=always"
86     calendar.followtag           = args.followtag or false
87     calendar.icons               = args.icons or icons_dir .. "cal/white/"
88     calendar.notification_preset = args.notification_preset
89
90     if not calendar.notification_preset then
91         calendar.notification_preset      = naughty.config.defaults
92         calendar.notification_preset.font = "Monospace 10"
93         calendar.notification_preset.fg   = "#FFFFFF"
94         calendar.notification_preset.bg   = "#000000"
95     end
96
97     widget:connect_signal("mouse::enter", function () calendar.show(0, 0, calendar.scr_pos) end)
98     widget:connect_signal("mouse::leave", function () calendar.hide() end)
99     widget:buttons(awful.util.table.join(awful.button({ }, 1, function ()
100                                              calendar.show(0, -1, calendar.scr_pos) end),
101                                          awful.button({ }, 3, function ()
102                                              calendar.show(0, 1, calendar.scr_pos) end),
103                                          awful.button({ }, 4, function ()
104                                              calendar.show(0, -1, calendar.scr_pos) end),
105                                          awful.button({ }, 5, function ()
106                                              calendar.show(0, 1, calendar.scr_pos) end)))
107 end
108
109 return setmetatable(calendar, { __call = function(_, ...) return create(...) end })