Merge pull request #83 from anticlockwise/master

Adding a user contributed widget for displaying MOC information

widgets/contrib/moc.lua

@@ -0,0 +1,102 @@
+
+--[[
+                                                   
+     Licensed under GNU General Public License v2  
+      * (c) 2014, anticlockwise <http://github.com/anticlockwise>
+                                                   
+--]]
+
+local helpers = require("lain.helpers")
+local async   = require("lain.asyncshell")
+
+local escape_f = require("awful.util").escape
+local naughty  = require("naughty")
+local wibox    = require("wibox")
+
+local io     = { popen   = io.popen }
+local os     = { execute = os.execute,
+                 getenv  = os.getenv }
+local string = { format  = string.format,
+                 gmatch  = string.gmatch }
+
+local setmetatable = setmetatable
+
+local moc = {}
+
+local function worker(args)
+    local args        = args or {}
+    local timeout     = args.timeout or 2
+    local music_dir   = args.music_dir or os.getenv("HOME") .. "/Music"
+    local cover_size  = args.cover_size or 100
+    local default_art = args.default_art or ""
+    local settings    = args.settings or function() end
+
+    local mpdcover = helpers.scripts_dir .. "mpdcover"
+
+    moc.widget = wibox.widget.textbox('')
+
+    moc_notification_preset = {
+        title   = "Now playing",
+        timeout = 6
+    }
+
+    helpers.set_map("current moc track", nil)
+
+    function moc.update()
+        -- mocp -i will produce output like:
+        -- Artist: Travis
+        -- Album: The Man Who
+        -- etc.
+        async.request("mocp -i", function(f)
+            moc_now = {
+                state   = "N/A",
+                file    = "N/A",
+                artist  = "N/A",
+                title   = "N/A",
+                album   = "N/A",
+                elapsed = "N/A",
+                total   = "N/A"
+            }
+
+            for line in f:lines() do
+                for k, v in string.gmatch(line, "([%w]+):[%s](.*)$") do
+                    if k == "State" then moc_now.state = v
+                    elseif k == "File" then moc_now.file = v
+                    elseif k == "Artist" then moc_now.artist = escape_f(v)
+                    elseif k == "SongTitle" then moc_now.title = escape_f(v)
+                    elseif k == "Album" then moc_now.album = escape_f(v)
+                    elseif k == "CurrentTime" then moc_now.elapsed = escape_f(v)
+                    elseif k == "TotalTime" then moc_now.total = escape_f(v)
+                    end
+                end
+            end
+
+            moc_notification_preset.text = string.format("%s (%s) - %s\n%s", moc_now.artist,
+                                           moc_now.album, moc_now.total, moc_now.title)
+            widget = moc.widget
+            settings()
+
+            if moc_now.state == "PLAY" then
+                if moc_now.title ~= helpers.get_map("current moc track") then
+                    helpers.set_map("current moc track", moc_now.title)
+                    os.execute(string.format("%s %q %q %d %q", mpdcover, "",
+                               moc_now.file, cover_size, default_art))
+
+                    moc.id = naughty.notify({
+                        preset = moc_notification_preset,
+                        icon = "/tmp/mpdcover.png",
+                        replaces_id = moc.id,
+                    }).id
+                end
+            elseif  moc_now.state ~= "PAUSE" then
+                helpers.set_map("current moc track", nil)
+            end
+        end)
+    end
+
+    helpers.newtimer("moc", timeout, moc.update)
+
+    return setmetatable(moc, { __index = moc.widget })
+end
+
+return setmetatable(moc, { __call = function(_, ...) return worker(...) end })