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# warning, this is work in progress.
# plus, the "global_session" stuff is of course very lame.
# plus, the error handling sucks.
from Screens.Screen import Screen
from Screens.MessageBox import MessageBox
from Components.ActionMap import ActionMap
from Components.GUIComponent import GUIComponent
from Components.MultiContent import MultiContentEntryText
from Plugins.Plugin import PluginDescriptor
from enigma import eListboxPythonMultiContent, eListbox, gFont, RT_HALIGN_LEFT, RT_WRAP
from twisted.web.client import getPage
import xml.dom.minidom
from Tools.XMLTools import mergeText, elementsWithTag
from enigma import eTimer
from sets import Set
my_global_session = None
urls = ["http://www.heise.de/newsticker/heise.rdf", "http://rss.slashdot.org/Slashdot/slashdot/to"]
from Components.config import config, ConfigSubsection, ConfigSelection, getConfigListEntry
from Components.ConfigList import ConfigListScreen
config.simpleRSS = ConfigSubsection()
config.simpleRSS.hostname = ConfigSelection(choices = urls)
class SimpleRSS(ConfigListScreen, Screen):
skin = """
<screen position="100,100" size="550,400" title="Simple RSS Reader" >
<widget name="config" position="20,10" size="460,350" scrollbarMode="showOnDemand" />
</screen>"""
def __init__(self, session, args = None):
print "screen init"
Screen.__init__(self, session)
self.skin = SimpleRSS.skin
self.onClose.append(self.abort)
# nun erzeugen wir eine liste von elementen fuer die menu liste.
self.list = [ ]
self.list.append(getConfigListEntry(_("RSS Feed URI"), config.simpleRSS.hostname))
# die liste selbst
ConfigListScreen.__init__(self, self.list)
self["actions"] = ActionMap([ "OkCancelActions" ],
{
"ok": self.close,
# "cancel": self.close,
})
self["setupActions"] = ActionMap(["SetupActions"],
{
"save": self.save,
"cancel": self.close
}, -1)
def abort(self):
print "aborting"
def save(self):
for x in self["config"].list:
x[1].save()
self.close()
def cancel(self):
for x in self["config"].list:
x[1].cancel()
self.close()
class RSSList(GUIComponent):
def __init__(self, entries):
GUIComponent.__init__(self)
self.l = eListboxPythonMultiContent()
self.l.setFont(0, gFont("Regular", 22))
self.l.setFont(1, gFont("Regular", 18))
self.list = [self.buildListboxEntry(x) for x in entries]
self.l.setList(self.list)
GUI_WIDGET = eListbox
def postWidgetCreate(self, instance):
instance.setContent(self.l)
instance.setItemHeight(100)
def buildListboxEntry(self, rss_entry):
res = [ rss_entry ]
res.append(MultiContentEntryText(pos=(0, 0), size=(460, 75), font=0, flags = RT_HALIGN_LEFT|RT_WRAP, text = rss_entry[0]))
res.append(MultiContentEntryText(pos=(0, 75), size=(460, 20), font=1, flags = RT_HALIGN_LEFT, text = rss_entry[1]))
return res
def getCurrentEntry(self):
return self.l.getCurrentSelection()
class RSSDisplay(Screen):
skin = """
<screen position="100,100" size="460,400" title="Simple RSS Reader" >
<widget name="content" position="0,0" size="460,400" />
</screen>"""
def __init__(self, session, data, interactive = False):
Screen.__init__(self, session)
self.skin = RSSDisplay.skin
if interactive:
self["actions"] = ActionMap([ "OkCancelActions" ],
{
"ok": self.showCurrentEntry,
"cancel": self.close,
})
self["content"] = RSSList(data)
def showCurrentEntry(self):
current_entry = self["content"].getCurrentEntry()
if current_entry is None: # empty list
return
(title, link, enclosure) = current_entry[0]
if len(enclosure):
(url, type) = enclosure[0] # TODO: currently, we used the first enclosure. there can be multiple.
print "enclosure: url=%s, type=%s" % (url, type)
if type in ["video/mpeg", "audio/mpeg"]:
from enigma import eServiceReference
# we should better launch a player or so...
self.session.nav.playService(eServiceReference(4097, 0, url))
class RSSPoller:
MAX_HISTORY_ELEMENTS = 100
def __init__(self):
self.poll_timer = eTimer()
self.poll_timer.timeout.get().append(self.poll)
self.poll_timer.start(0, 1)
self.last_links = Set()
self.dialog = None
self.history = [ ]
def error(self, error):
if not my_global_session:
print "error polling"
else:
my_global_session.open(MessageBox, "Sorry, failed to fetch feed.\n" + error)
def _gotPage(self, data):
# workaround: exceptions in gotPage-callback were ignored
try:
self.gotPage(data)
except:
import traceback, sys
traceback.print_exc(file=sys.stdout)
raise e
def gotPage(self, data):
print "parsing.."
new_items = [ ]
dom = xml.dom.minidom.parseString(data)
for r in elementsWithTag(dom.childNodes, "rss"):
rss = r
items = [ ]
# RSS 1.0
for item in elementsWithTag(r.childNodes, "item"):
items.append(item)
# RSS 2.0
for channel in elementsWithTag(r.childNodes, "channel"):
for item in elementsWithTag(channel.childNodes, "item"):
items.append(item)
for item in items:
title = None
link = ""
enclosure = [ ]
print "got item"
for s in elementsWithTag(item.childNodes, lambda x: x in ["title", "link", "enclosure"]):
if s.tagName == "title":
title = mergeText(s.childNodes)
elif s.tagName == "link":
link = mergeText(s.childNodes)
elif s.tagName == "enclosure":
enclosure.append((s.getAttribute("url").encode("UTF-8"), s.getAttribute("type").encode("UTF-8")))
print title, link, enclosure
if title is None:
continue
rss_entry = (title.encode("UTF-8"), link.encode("UTF-8"), enclosure)
self.history.insert(0, rss_entry)
if link not in self.last_links:
self.last_links.add(link)
new_items.append(rss_entry)
print "NEW", rss_entry[0], rss_entry[1]
self.history = self.history[:self.MAX_HISTORY_ELEMENTS]
if len(new_items):
self.dialog = my_global_session.instantiateDialog(RSSDisplay, new_items)
self.dialog.show()
self.poll_timer.start(5000, 1)
else:
self.poll_timer.start(60000, 1)
def poll(self):
if self.dialog:
print "hiding"
self.dialog.hide()
self.dialog = None
self.poll_timer.start(60000, 1)
elif not my_global_session:
print "no session yet."
self.poll_timer.start(10000, 1)
else:
print "yes, session ok. starting"
self.d = getPage(config.simpleRSS.hostname.value).addCallback(self._gotPage).addErrback(self.error)
def shutdown(self):
self.poll_timer.timeout.get().remove(self.poll)
self.poll_timer = None
def main(session):
print "session.open"
session.open(SimpleRSS)
print "done"
rssPoller = None
def autostart(reason, **kwargs):
global rssPoller
print "autostart"
# ouch, this is a hack
if kwargs.has_key("session"):
global my_global_session
print "session now available"
my_global_session = kwargs["session"]
return
print "autostart"
if reason == 0:
rssPoller = RSSPoller()
elif reason == 1:
rssPoller.shutdown()
rssPoller = None
def showCurrent(session, **kwargs):
global rssPoller
if rssPoller is None:
return
session.open(RSSDisplay, rssPoller.history, interactive = True)
def Plugins(**kwargs):
return [ PluginDescriptor(name="RSS Reader", description="A (really) simple RSS reader", where = PluginDescriptor.WHERE_PLUGINMENU, fnc=main),
PluginDescriptor(where = [PluginDescriptor.WHERE_SESSIONSTART, PluginDescriptor.WHERE_AUTOSTART], fnc = autostart),
PluginDescriptor(name="View RSS", description="Let's you view current RSS entries", where = PluginDescriptor.WHERE_EXTENSIONSMENU, fnc=showCurrent) ]
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