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# Copyright (c) 2009 Entertainer Developers - See COPYING - GPLv2
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'''Rss - Screen displays RSS feeds'''
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from entertainerlib.gui.screens.screen import Screen
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from entertainerlib.gui.widgets.label import Label
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from entertainerlib.gui.widgets.texture import Texture
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from entertainerlib.gui.widgets.text_menu import TextMenu
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from entertainerlib.gui.widgets.list_indicator import ListIndicator
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from entertainerlib.backend.components.feeds.feed_utils import FeedEntryParser
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'''Screen displays RSS-feed titles and number of entries.'''
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def __init__(self, feed_library, move_to_new_screen_callback):
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Screen.__init__(self, 'Rss', move_to_new_screen_callback)
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self.feed_order = 'UNREAD' # Feeds ordered by number of unread entries
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self.theme = self.config.theme
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self.library = feed_library
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self.parser = FeedEntryParser()
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# Screen Title (Displayed at the bottom left corner)
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screen_title = Label(0.13, "screentitle", 0, 0.87, _("Headlines"))
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self.add(screen_title)
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icon = Texture(self.theme.getImage("rss_icon"), 0.05, 0.07)
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title = Label(0.0833, "title", 0.13, 0.07, _("RSS Feeds"))
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#We set the menus to None here so we can check if they exist later on
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self.context_menu = None
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# Display information box if there are not feeds available
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if self.library.is_empty() or len(self.library.get_feeds()) == 0:
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self._create_no_feeds_information()
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self._create_context_menu()
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self.menu = self._create_feed_menu()
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self._create_feed_menu_indicator()
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self.menu.active = True
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self.context_menu.active = False
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feeds_title = Label(0.04167, "title", 0.3953, 0.2, _("Feeds"))
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unread_title = Label(0.04167, "title", 0.8053, 0.2, _("Unread"))
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self.add(unread_title)
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# Feed description text
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desc_text = self.parser.strip_tags(
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self.menu.selected_userdata.description)
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self.description = Label(0.03646, "text", 0.3953, 0.9, desc_text)
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self.description.set_ellipsize(pango.ELLIPSIZE_END)
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self.description.set_use_markup(True)
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self.description.set_size(0.5088, 0.0651)
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self.add(self.description)
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self.menu.connect('selected', self._handle_select)
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self.menu.connect('moved', self._display_selected_feed)
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self.menu.connect('activated', self._menu_activation)
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self.context_menu.connect('selected', self._handle_select)
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self.context_menu.connect('activated',
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self._context_menu_activation)
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def _create_feed_menu(self):
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Create Feed-menu. This menu contains list of Feeds. It also displays
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number of unread entries per feed.
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menu = TextMenu(0.3807, 0.2604, 0.5124, 0.0781)
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feeds = self.library.get_feeds(self.feed_order)
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feeds_list = [[self.parser.strip_tags(feed.title), \
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str(feed.get_number_of_unread()), feed] \
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menu.async_add(feeds_list)
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def _create_feed_menu_indicator(self):
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'''Create a ListIndicator for feed menu.'''
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self.li = ListIndicator(0.7, 0.9, 0.2, 0.045, ListIndicator.VERTICAL)
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self.li.set_maximum(len(self.library.get_feeds(self.feed_order)))
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def _create_context_menu(self):
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Create RSS-feed context menu and add it to the screen.
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This menu contains buttons for update and sorting.
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self.context_menu = TextMenu(0.0732, 0.2604, 0.2196, 0.0781)
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self.context_menu.add_item(_("Update feeds"))
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self.context_menu.add_item(_("Mark all as read"))
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self.context_menu.add_item(_("Sort by name"))
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self.context_menu.add_item(_("Sort by unread"))
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self.context_menu.active = False
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self.add(self.context_menu)
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def _create_no_feeds_information(self):
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Create textures and labels for information screen. This is displayed
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instead of feeds list if there are no feeds available. This screen helps
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users to add new feeds to the system.
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# Create warning icon
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warning_icon = Texture(self.theme.getImage("warning_icon"), 0.28, 0.27)
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self.add(warning_icon)
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# Create warning title
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info_title = Label(0.0625, "title", 0.3367, 0.2709,
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_("No headlines available!"))
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# Create warning help text
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"To use headlines you have to add some RSS feeds with the Content "
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"management tool. To do this, start the Content management tool, "
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"open the 'RSS Feeds' tab and click the 'Add' button. Now you can "
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"write an RSS feed URL in the text entry. You can get RSS feed "
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"URLs from webpages that support RSS.")
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info = Label(0.0417, "menuitem_inactive", 0.2804, 0.45, message)
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info.set_size(0.5, 0.5208)
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def update(self, event=None):
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Update screen widgets. This is called always when screen is poped from
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feeds = self.library.get_feeds(self.feed_order)
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for idx, item in enumerate(self.menu.items):
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item.update(self.parser.strip_tags(feed.title),
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str(feed.get_number_of_unread()))
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def _handle_up(self):
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'''Handle UserEvent.NAVIGATE_UP.'''
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self.context_menu.up()
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def _handle_down(self):
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'''Handle UserEvent.NAVIGATE_DOWN.'''
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self.context_menu.down()
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def _handle_left(self):
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'''Handle UserEvent.NAVIGATE_LEFT.'''
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self._context_menu_activation()
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def _handle_right(self):
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'''Handle UserEvent.NAVIGATE_RIGHT.'''
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if not self.menu.active:
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self._menu_activation()
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def _handle_select(self, event=None):
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'''Handle UserEvent.NAVIGATE_SELECT.'''
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if not self.menu.active:
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index = self.context_menu.selected_index
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# Send message to bus and update screen
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self.library.request_feed_update()
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# Tell feedlibrary to mark all as read and then update screen
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self.library.mark_all_as_read()
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# Sort feeds by title ASC and update screen
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self.feed_order = 'TITLE'
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# Sort feeds by UNREAD DESC and update screen
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self.feed_order = 'UNREAD'
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# Feed selected from the menu. Change screen.
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feed = self.menu.selected_userdata
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kwargs = { 'feed' : feed }
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self.callback("feed", kwargs)
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def handle_user_event(self, event=None):
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'''Handle screen specific user events unless the library is empty.'''
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if self.library.is_empty() or len(self.library.get_feeds()) == 0:
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Screen.handle_user_event(self, event)
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def _display_selected_feed(self, actor=None):
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'''Update of the list indicator and the description label'''
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self.li.set_current(self.menu.selected_index + 1)
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feed = self.menu.selected_userdata
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self.description.set_text(self.parser.strip_tags(feed.description))
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def _menu_activation(self, actor=None):
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'''Handle the menu activation'''
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self.menu.active = True
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self.context_menu.active = False
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self.li.show_position()
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self.description.show()
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def _context_menu_activation(self, actor=None):
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'''Handle the context menu activation'''
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self.menu.active = False
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self.context_menu.active = True
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self.li.hide_position()
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self.description.hide()
added
removed
entertainerlib/gui/screens/rss.py
