def postprocess_filter_homepage(self, row, channel):
        if not row.get("homepage"):
            url = self.rx_www_url.search(row.get("title", ""))
            if url:
                url = url.group(0).lower().replace(" ", "")
                url = (url if url.find("www.") == 0 else "www."+url)
                row["homepage"] = ahttp.fix_url(url)

        return True


    # Finds differences in new/old streamlist, marks deleted with flag
    def deleted_streams(self, new, old):
        diff = []
        new = [row.get("url","http://example.com/") for row in new]

    # constructor
    def __init__(self):
        
        # Load stylesheet, instantiate GtkBuilder in self, menu and logo hooks
        gui_startup(1/20.0), gtk.Builder.__init__(self)
        gui_startup(1/20.0), gtk.Builder.add_from_string(self, ui_xml)
        gui_startup(3/20.0), self.logo_scale(1.0)

        # initialize built-in plugins
        self.channels = {
          "bookmarks": channels.bookmarks.bookmarks(parent=self),   # this the remaining built-in channel
        }
        # dialogs that are connected to main
        self.features = {

            "on_reload_clicked": self.on_reload_clicked,
            "on_homepage_channel_clicked" : self.on_homepage_channel_clicked,
            "double_click_channel_tab": self.on_homepage_channel_clicked,
            # menu
            "menu_toolbar_standard": lambda w: (self.toolbar.unset_style(), self.toolbar.unset_icon_size()),
            "menu_toolbar_style_icons": lambda w: (self.toolbar.set_style(gtk.TOOLBAR_ICONS)),
            "menu_toolbar_style_both": lambda w: (self.toolbar.set_style(gtk.TOOLBAR_BOTH)),
            "menu_toolbar_size_small": lambda w: (self.toolbar.set_icon_size(gtk.ICON_SIZE_SMALL_TOOLBAR), self.logo_scale(0.40)),
            "menu_toolbar_size_medium": lambda w: (self.toolbar.set_icon_size(gtk.ICON_SIZE_DND), self.logo_scale(0.75)),
            "menu_toolbar_size_large": lambda w: (self.toolbar.set_icon_size(gtk.ICON_SIZE_DIALOG), self.logo_scale(1.0)),
            "menu_notebook_pos_top": lambda w: self.notebook_channels.set_tab_pos(2),
            "menu_notebook_pos_left": lambda w: self.notebook_channels.set_tab_pos(0),
            "menu_notebook_pos_right": lambda w: self.notebook_channels.set_tab_pos(1),
            "menu_notebook_pos_bottom": lambda w: self.notebook_channels.set_tab_pos(3),
            # win_config
            "menu_properties": self.configwin.open,
            "config_cancel": self.configwin.hide,

                else:
                    self.features[name] = plugin_obj
                
            except Exception as e:
                log.INIT("load_plugin_channels: error initializing:", name, ", exception:")
                traceback.print_exc()


    # Redraw logo        
    def logo_scale(self, r=1.0, map=None):
        pix = uikit.pixbuf(logo.png, decode=1, fmt="png")
        if map and map in (2,5,0):
            r = { 2: 0.45, 5: 0.75, 0: 1.0 }[map]
        if r != 1.0:
            pix = pix.scale_simple(int(321*r), int(115*r), gtk.gdk.INTERP_BILINEAR)
        self.img_logo.set_from_pixbuf(pix)


    # load application state (widget sizes, selections, etc.)
    def init_app_state(self):
        winlayout = conf.load("window")
        if (winlayout):
            try:
                uikit.app_restore(self, winlayout)
                self.logo_scale(map=winlayout["toolbar"]["icon_size"])
            except Exception as e:
                log.APPSTATE_RESTORE(e) # may fail for disabled/reordered plugin channels


    # store window/widget states (sizes, selections, etc.)
    def save_app_state(self, widget):
        # gtk widget states
        widgetnames = ["win_streamtuner2", "toolbar", "notebook_channels", ] \
                    + [id+"_list" for id in self.channel_names] \

            pos = len(uikit.idle_tasks)
        # Run callback right away
        if uikit.in_idle or conf.nothreads:
            log.UIKIT_RUN_NOW(name)
            callback(*args, **kwargs)
        # Spool them for Gtk idle handling
        else:
            #log.UIKIT_SPOOL(name)
            uikit.idle_tasks.insert(pos, [lambda: callback(*args, **kwargs), name])
            gobject.idle_add(uikit.idle_do)
    
    # Collect tasks to perform in gtk.main loop
    idle_tasks = []
    in_idle = False