dotfiles/awesome/launchbar.lua

-- Quick launchbar widget for Awesome WM
-- http://awesome.naquadah.org/wiki/Quick_launch_bar_widget/3.5
-- Put into your awesome/ folder and add the following to rc.lua:
--   local launchbar = require('launchbar')
--   local mylb = launchbar("/path/to/directory/with/shortcuts/")
-- Then add mylb to the wibox.

local naughty = require('naughty')
local layout = require("wibox.layout")
local util = require("awful.util")
local spawn = require('awful.spawn')
local launcher = require("command_launcher")

local launchbar = {}

local function getValue(t, key)
    local _, _, res = string.find(t, key .. " *= *([^%c]+)%c")
    return res
end

local function find_icon(icon_name)
    if string.sub(icon_name, 1, 1) == '/' then
        if util.file_readable(icon_name) then
            return icon_name
        else
            return nil
        end
    end

    if launchbar.icon_dirs then
        for _, v in ipairs(launchbar.icon_dirs) do
            if util.file_readable(v .. "/" .. icon_name) then
                return v .. '/' .. icon_name
            end
        end
    end
    return nil
end

function launchbar.new(filedir)
    if not filedir then
        error("Launchbar: filedir was not specified")
    end
    local items = {}
    local widget = layout.fixed.horizontal()
    local files = io.popen("ls " .. filedir .. "*.desktop")
    for f in files:lines() do
        local t = io.open(f):read("*all")
        table.insert(items, { image = find_icon(getValue(t,"Icon")),
        callback = function ()
            naughty.notify({
                title = "Starting " .. getValue(t, "Name"),
                text = ""
            })
            spawn(getValue(t,"Exec"))
        end,
        position = tonumber(getValue(t,"Position")) or 255 })
    end
    table.sort(items, function(a,b) return a.position < b.position end)
    for _, v in ipairs(items) do
        if v.image then
            widget:add(launcher(v))
        end
    end
    return widget
end

return setmetatable(launchbar, { __call = function(_, ...) return launchbar.new(...) end })