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