--[[ Licensed under GNU General Public License v2 * (c) 2013, Luke Bonham --]] local debug = require("debug") local capi = { timer = (type(timer) == 'table' and timer or require ("gears.timer")) } local io = { open = io.open, lines = io.lines, popen = io.popen } local rawget = rawget -- Lain helper functions for internal use -- lain.helpers local helpers = {} helpers.lain_dir = debug.getinfo(1, 'S').source:match[[^@(.*/).*$]] helpers.icons_dir = helpers.lain_dir .. 'icons/' helpers.scripts_dir = helpers.lain_dir .. 'scripts/' -- {{{ Modules loader function helpers.wrequire(table, key) local module = rawget(table, key) return module or require(table._NAME .. '.' .. key) end -- }}} -- {{{ File operations -- see if the file exists and is readable function helpers.file_exists(file) local f = io.open(file) if f then local s = f:read() f:close() f = s end return f ~= nil end -- get all lines from a file, returns an empty -- list/table if the file does not exist function helpers.lines_from(file) if not helpers.file_exists(file) then return {} end lines = {} for line in io.lines(file) do lines[#lines + 1] = line end return lines end -- get first line of a file, return nil if -- the file does not exist function helpers.first_line(file) return helpers.lines_from(file)[1] end -- get first non empty line from a file, -- returns nil otherwise function helpers.first_nonempty_line(file) for k,v in pairs(helpers.lines_from(file)) do if #v then return v end end return nil end -- }}} -- {{{ Timer maker helpers.timer_table = {} function helpers.newtimer(name, timeout, fun, nostart) helpers.timer_table[name] = capi.timer({ timeout = timeout }) helpers.timer_table[name]:connect_signal("timeout", fun) helpers.timer_table[name]:start() if not nostart then helpers.timer_table[name]:emit_signal("timeout") end end -- }}} -- {{{ Pipe operations -- read the full output of a pipe (command) function helpers.read_pipe(cmd) local f = assert(io.popen(cmd)) local output = f:read("*all") f:close() return output end -- }}} -- {{{ A map utility helpers.map_table = {} function helpers.set_map(element, value) helpers.map_table[element] = value end function helpers.get_map(element) return helpers.map_table[element] end -- }}} return helpers