config[key] = {}
                    for row in w:
                        if row[0] and row[1]:
                            config[key][row[0]] = row[1]
            __print__(dbg.CONF, "config save", prefix+key, val)
    
    
    # Generic Gtk callback to update ListStore when entries get edited
    # Generic Gtk callback to update ListStore when entries get edited.
    # (The main signal_connect() dict prepares individual lambda funcs
    # for each ListStore column id.)
    def list_edit(self, liststore, path, column, new_text):
        liststore[path][column] = new_text
        liststore[path][3] = self.app_bin_check(new_text)
        # The signal_connect() dict actually prepares individual lambda functions
        # to bind the correct ListStore and column id.

    # return OK or CANCEL depending on availability of app
    def app_bin_check(self, v):
        m = re.search("(?![$(`])\S+", v)
        if m and m.group(0) and find_executable(m.group(0)):
            return gtk.STOCK_MEDIA_PLAY
        else:
            return gtk.STOCK_CANCEL
        if m and m.group(0):
            if find_executable(m.group(0)):
                return gtk.STOCK_MEDIA_PLAY
            else:
                return gtk.STOCK_CANCEL
        else:
            return gtk.STOCK_NEW
        


    # iterate over channel and feature plugins
    def add_plugins(self):
        ls = dict([(name, plugin_meta(module=name)) for name in module_list()])
        #for name in module_list():
        #    if name in self.channels:
        #        ls[name] = self.channels[name].meta
        #    elif name in self.features:
        #        ls[name] = self.features[name].meta
        #    else:
        #        ls[name] = plugin_meta(module=name)
        for name,meta in sorted(ls.items(), key=lambda e: e[1]["type"]+e[1]["title"].lower(), reverse=False):
            if not name in conf.plugins:
                conf.plugins[name] = False
            self.add_plg(name, meta)


    # add configuration setting definitions from plugins
    plugin_text = "<span size='larger' weight='heavy'>%s</span> <span style='italic' foreground='slate blue'>(%s/%s)</span> <span weight='bold' foreground='orange'>%s</span>\n<span size='smaller' stretch='ultraexpanded'>%s</span>"
    def add_plg(self, name, meta):
        # add plugin load entry

           "video/*": self.find_player(typ="video", default="vlc"),
           "url/http": self.find_player(typ="browser"),
        }
        self.record = {
           "audio/*": self.find_player(typ="xterm") + " -e streamripper %srv",   # -d /home/***USERNAME***/Musik
           "video/youtube": self.find_player(typ="xterm") + " -e \"youtube-dl %srv\"",
        }
        # these presets are a temporary workaround, until `priority:` is checked before module loading
        # Presets are redundant now. On first startup the `priority:` field of each plugin is checked.
        self.plugins = {
             # core plugins, cannot be disabled anyway
            "bookmarks": 1,
            "search": 1,
            "streamedit": 1,
            "configwin": 1,
            # standard channels
            "shoutcast": 1,
            "xiph": 1,
            "myoggradio": 1,
            "internet_radio": 1,
            "surfmusik": 1,
            "jamendo": 1,
            "icast": 1,
            "itunes": 1,
            # disabled per default
            "radiobrowser": 0,
            "youtube": 0,
            "modarchive": 0,
            "live365": 0,
            "radiotray": 0,
            "timer": 0,
            "history": 0,
            "global_key": 0,
            "useragentswitcher": 0,
            # obsolete / removed
            "file": 0,
            "punkcast": 0,
            "basicch": 0,
            "tv": 0,
        }
        self.tmp = os.environ.get("TEMP", "/tmp")
        self.max_streams = "500"
        self.show_bookmarks = 1
        self.show_favicons = 1
        self.load_favicon = 1
        self.heuristic_bookmark_update = 0

        config = meta.get("config", [])
        for opt in config:
            if ("name" in opt) and ("value" in opt) and (opt["name"] not in vars(self)):
                self.__dict__[opt["name"]] = opt["value"]

        # plugin state
        if module and module not in conf.plugins:
             conf.plugins[module] = meta.get("priority") in ("core", "builtin", "default", "standard")
             conf.plugins[module] = meta.get("priority") in ("core", "builtin", "always", "default", "standard")


    # look at system binaries for standard audio players
    def find_player(self, typ="audio", default="xdg-open"):
        players = {
           "audio": ["audacious %g", "audacious2", "exaile %p", "xmms2", "banshee", "amarok %g", "clementine", "qmmp", "quodlibet", "aqualung", "mp3blaster %g", "vlc --one-instance %srv", "totem"],
           "video": ["parole", "umplayer", "xnoise", "gxine", "totem", "vlc --one-instance", "smplayer", "gnome-media-player", "xine", "bangarang"],
           "browser": ["opera", "midori", "sensible-browser"],
           "xterm": ["xfce4-terminal", "x-termina-emulator", "gnome-terminal", "xterm", "rxvt"],
        }
        for bin in players[typ]:
            if find_executable(bin.split()[0]):
                return bin
        return default

        
    # http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html
    def xdg(self, path="/streamtuner2"):
        home = os.environ.get("HOME", self.tmp)
        config = os.environ.get("XDG_CONFIG_HOME", os.environ.get("APPDATA", home+"/.config"))
        
        # storage dir

    def update(self, with_new_data):
        for key,value in with_new_data.items():
            if type(value) == dict:
                self[key].update(value)
            else:
                self[key] = value
        # descends into sub-dicts instead of wiping them with subkeys


    # update old setting names
    def migrate(self):
        # 2.1.1
        if "audio/mp3" in self.play:
            self.play["audio/mpeg"] = self.play["audio/mp3"]
            del self.play["audio/mp3"]

         
    # check for existing filename in directory list
    def find_in_dirs(self, dirs, file):
        for d in dirs:
            if os.path.exists(d+"/"+file):
                return d+"/"+file


    # standard user account storage in ~/.netrc or less standard but contemporarily in ~/.config/netrc
    def netrc(self, varhosts=("shoutcast.com")):
        global netrc
        if not netrc:
            netrc = {}
            try:

            if server in netrc:
                return netrc[server]
        


# Retrieve content from install path or pyzip archive (alias for pkgutil.get_data)
#
def get_data(fn, decode=False, z=False):
def get_data(fn, decode=False, z=False, file_base="config"):
    try:
        bin = pkgutil.get_data("config", fn)
        bin = pkgutil.get_data(file_base, fn)
        if z:
            bin = zlib.decompress(bin)
        if decode:
            return bin.decode("utf-8")
        else:
            return str(bin)
    except:
        pass


# Search through ./channels/ and get module basenames.
# (Reordering channel tabs is now done by uikit.apply_state.)
#
def module_list():
def module_list(plugin_base="channels"):

    # Should list plugins within zips as well as local paths
    ls = pkgutil.iter_modules([conf.share+"/channels", "channels"])
    ls = pkgutil.iter_modules([plugin_base, conf.share+"/"+plugin_base, conf.dir+"/plugins"])
    return [name for loader,name,ispkg in ls]



# Plugin meta data extraction
#
# Extremely crude version for Python and streamtuner2 plugin usage.
# But can fetch from different sources:
#  · fn= to read from literal files, out of a .pyzip package
#  · src= to extract from pre-read script code
#  · module= utilizes pkgutil to read 
#  · frame= automatically extract comment header from caller
#
def plugin_meta(fn=None, src=None, module=None, frame=1):
def plugin_meta(fn=None, src=None, module=None, frame=1, plugin_base="channels"):

    # try via pkgutil first
    if module:
       fn = module
       src = pkgutil.get_data("channels", fn+".py")
       src = pkgutil.get_data(plugin_base, fn+".py")

    # get source directly from caller
    elif not src and not fn:
        module = inspect.getmodule(sys._getframe(frame))
        fn = inspect.getsourcefile(module)
        src = inspect.getcomments(module)

# config:  
#   { type: env, name: http_proxy, description: proxy for HTTP access }
#   { type: env, name: XDG_CONFIG_HOME, description: relocates user .config subdirectory }
# category: sound
# depends: pygtk | gi, threading, requests, pyquery, lxml
# id: streamtuner2
# pack: *.py, gtk3.xml.zlib, bin, channels/__init__.py, bundle/*.py, CREDITS, help/index.page,
#   streamtuner2.desktop=/usr/share/applications/, README=/usr/share/doc/streamtuner2/,
#   help/streamtuner2.1=/usr/share/man/man1/, NEWS.gz=/usr/share/doc/streamtuner2/changelog.gz,
#   logo.png=/usr/share/pixmaps/streamtuner2.png
#   streamtuner2.desktop, README, help/streamtuner2.1=/usr/share/man/man1/,
#   NEWS.gz=/usr/share/doc/streamtuner2/changelog.gz, logo.png=/usr/share/pixmaps/streamtuner2.png
# architecture: all
#
# Streamtuner2 is a GUI for browsing internet radio directories, music
# collections, and video services - grouped by genres or categories.
# It runs your preferred audio player, and streamripper for recording.
#
# It's an independent rewrite of streamtuner1. Being written in Python,

    # load plugins from /usr/share/streamtuner2/channels/
    def load_plugin_channels(self):

        # initialize plugin modules (pre-ordered)
        ls = module_list()
        for module in ls:
            gui_startup(4/20.0 + 13.5/20.0 * float(ls.index(module))/len(ls), "loading module "+module)
        for name in ls:
            gui_startup(4/20.0 + 13.5/20.0 * float(ls.index(name))/len(ls), "loading module "+name)

            # load defaults on first startup
            if not name in conf.plugins:
                conf.add_plugin_defaults(plugin_meta(module=name), name)
            
            # skip module if disabled
            if conf.plugins.get(module, 1) == False:
                __print__(dbg.STAT, "disabled plugin:", module)
            if conf.plugins.get(name, 1) == False:
                __print__(dbg.STAT, "disabled plugin:", name)
                continue
            # or if it's a built-in (already imported)
            elif module in self.features or module in self.channels:
            elif name in self.features or name in self.channels:
                continue
            
            # load plugin
            try:
                plugin = __import__("channels."+module, globals(), None, [""])
                plugin = __import__("channels."+name, globals(), None, [""])
                #print [name for name,c in inspect.getmembers(plugin) if inspect.isclass(c)]
                plugin_class = plugin.__dict__[module]
                plugin_class = plugin.__dict__[name]
                plugin_obj = plugin_class(parent=self)

                # add to .channels{}
                if issubclass(plugin_class, channels.GenericChannel):
                    self.channels[module] = plugin_obj
                    self.channels[name] = plugin_obj
                # or .features{} for other plugin types
                else:
                    self.features[module] = plugin_obj
                    self.features[name] = plugin_obj
                
            except Exception as e:
                __print__(dbg.INIT, "load_plugin_channels: error initializing:", module, ", exception:")
                __print__(dbg.INIT, "load_plugin_channels: error initializing:", name, ", exception:")
                traceback.print_exc()


    # store window/widget states (sizes, selections, etc.)
    def app_state(self, widget):
        # gtk widget states
        widgetnames = ["win_streamtuner2", "toolbar", "notebook_channels", ] \