--]]
-local debug = require("debug")
-local capi = { timer = timer }
-local io = { open = io.open,
- lines = io.lines,
- popen = io.popen }
-local rawget = rawget
+local debug = require("debug")
+local io = { lines = io.lines,
+ open = io.open,
+ popen = io.popen }
+local rawget = rawget
+local table = { sort = table.sort }
+
+local easy_async = require("awful.spawn").easy_async
+local timer = require("gears.timer")
+local wibox = require("wibox")
-- Lain helper functions for internal use
-- lain.helpers
-- list/table if the file does not exist
function helpers.lines_from(file)
if not helpers.file_exists(file) then return {} end
- lines = {}
+ local lines = {}
for line in io.lines(file) do
lines[#lines + 1] = line
end
return lines
end
+-- match all lines from a file, returns an empty
+-- list/table if the file or match does not exist
+function helpers.lines_match(regexp, file)
+ local lines = {}
+ for index,line in pairs(helpers.lines_from(file)) do
+ if string.match(line, regexp) then
+ lines[index] = line
+ end
+ end
+ return lines
+end
+
-- get first line of a file, return nil if
-- the file does not exist
function helpers.first_line(file)
helpers.timer_table = {}
-function helpers.newtimer(_name, timeout, fun, nostart)
- local name = timeout
-
+function helpers.newtimer(name, timeout, fun, nostart, stoppable)
+ if not name or #name == 0 then return end
+ name = (stoppable and name) or timeout
if not helpers.timer_table[name] then
- helpers.timer_table[name] = capi.timer({ timeout = timeout })
+ helpers.timer_table[name] = timer({ timeout = timeout })
helpers.timer_table[name]:start()
end
-
helpers.timer_table[name]:connect_signal("timeout", fun)
-
if not nostart then
helpers.timer_table[name]:emit_signal("timeout")
end
+ return stoppable and helpers.timer_table[name]
end
-- }}}
-- {{{ Pipe operations
--- read the full output of a pipe (command)
+-- return the full output of an input command (synchronous pipe)
+-- @param cmd the input command
+-- @return command output (string)
function helpers.read_pipe(cmd)
- local f = assert(io.popen(cmd))
+ local f = io.popen(cmd)
local output = f:read("*all")
f:close()
return output
end
+-- run a command and execute a function on its output (asynchronous pipe)
+-- @param cmd the input command
+-- @param callback function to execute on cmd output
+-- @return cmd PID
+function helpers.async(cmd, callback)
+ return easy_async(cmd,
+ function (stdout, stderr, reason, exit_code)
+ callback(stdout)
+ end)
+end
+
-- }}}
-- {{{ A map utility
-- }}}
+-- {{{ Misc
+
+-- check if an element exist on a table
+function helpers.element_in_table(element, tbl)
+ for _, i in pairs(tbl) do
+ if i == element then
+ return true
+ end
+ end
+ return false
+end
+
+-- iterate over table of records sorted by keys
+function helpers.spairs(t)
+ -- collect the keys
+ local keys = {}
+ for k in pairs(t) do keys[#keys+1] = k end
+
+ table.sort(keys)
+
+ -- return the iterator function
+ local i = 0
+ return function()
+ i = i + 1
+ if keys[i] then
+ return keys[i], t[keys[i]]
+ end
+ end
+end
+
+-- create a textbox with no spacing issues
+function helpers.make_widget_textbox()
+ local w = wibox.widget.textbox()
+ --local t = wibox.widget.base.make_widget(w)
+ --t.widget = w
+ --return t
+ return setmetatable({ widget = w }, { __index = w })
+end
+
+-- }}}
+
return helpers