1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
---------------------------------------------------------------------------
--- Watch widget.
-- Here is an example of simple temperature widget which will update each 15
-- seconds implemented in two different ways.
-- The first, simpler one, will just display the return command output
-- (so output is stripped by shell commands).
-- In the other example `sensors` returns to the widget its full output
-- and it's trimmed in the widget callback function:
--
-- 211 mytextclock,
-- 212 wibox.widget.textbox(' | '),
-- 213 -- one way to do that:
-- 214 awful.widget.watch('bash -c "sensors | grep temp1"', 15),
-- 215 -- another way:
-- 216 awful.widget.watch('sensors', 15, function(widget, stdout)
-- 217 for line in stdout:gmatch("[^\r\n]+") do
-- 218 if line:match("temp1") then
-- 219 widget:set_text(line)
-- 220 return
-- 221 end
-- 222 end
-- 223 end),
-- 224 s.mylayoutbox,
--
-- 
--
-- @author Benjamin Petrenko
-- @author Yauheni Kirylau
-- @copyright 2015, 2016 Benjamin Petrenko, Yauheni Kirylau
-- @classmod awful.widget.watch
---------------------------------------------------------------------------
local setmetatable = setmetatable
local textbox = require("wibox.widget.textbox")
local timer = require("gears.timer")
local spawn = require("awful.spawn")
local watch = { mt = {} }
--- Create a textbox that shows the output of a command
-- and updates it at a given time interval.
--
-- @tparam string|table command The command.
--
-- @tparam[opt=5] integer timeout The time interval at which the textbox
-- will be updated.
--
-- @tparam[opt] function callback The function that will be called after
-- the command output will be received. it is shown in the textbox.
-- Defaults to:
-- function(widget, stdout, stderr, exitreason, exitcode)
-- widget:set_text(stdout)
-- end
-- @param callback.widget Base widget instance.
-- @tparam string callback.stdout Output on stdout.
-- @tparam string callback.stderr Output on stderr.
-- @tparam string callback.exitreason Exit Reason.
-- The reason can be "exit" or "signal".
-- @tparam integer callback.exitcode Exit code.
-- For "exit" reason it's the exit code.
-- For "signal" reason — the signal causing process termination.
--
-- @param[opt=wibox.widget.textbox()] base_widget Base widget.
--
-- @return The widget used by this watch
function watch.new(command, timeout, callback, base_widget)
timeout = timeout or 5
base_widget = base_widget or textbox()
callback = callback or function(widget, stdout, stderr, exitreason, exitcode) -- luacheck: no unused args
widget:set_text(stdout)
end
local t = timer { timeout = timeout }
t:connect_signal("timeout", function()
t:stop()
spawn.easy_async(command, function(stdout, stderr, exitreason, exitcode)
callback(base_widget, stdout, stderr, exitreason, exitcode)
t:again()
end)
end)
t:start()
t:emit_signal("timeout")
return base_widget
end
function watch.mt.__call(_, ...)
return watch.new(...)
end
return setmetatable(watch, watch.mt)
-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
|
