#!/usr/bin/python
import sys
from xml.sax import parse
from xml.sax.handler import ContentHandler

# http://wxpython.org/
from wxPython.wx import *
from wxPython.html import *

# http://diveintomark.org/projects/rss_parser/index.html
import rssparser

# simple SAX parser for OPML files.  Handles Radio and Syndirella formats
class opml(ContentHandler):
  outline={}
  def __init__(self,file):
      ContentHandler.__init__(self)
      parse(file, self)

  def startElement(self, name, attrs):
    if name=='outline': 
      values=dict(attrs)
      self.outline[attrs['title'].lower()]=values

  def names(self):
      keys = self.outline.keys()
      keys.sort()
      return keys

  def text(self, name):
      entry = self.outline[name]
      if 'text' in entry: return entry['text'].encode('iso-8859-1') 
      if 'title' in entry: return entry['title'].encode('iso-8859-1')

# Yet Another 3 Paned Aggregator
class wx3pa(wxApp):
    # model
    mySubs=None
    items=None

    # view
    tree=None
    list=None
    data=None

    def OnInit(self):
        # layout 
        frame = wxFrame(NULL, -1, "3 Paned Aggregator Mockup-demo")
        split1 = wxSplitterWindow(frame,-1)
        split2 = wxSplitterWindow(split1,-1)

	# panes 
	self.tree=wxTreeCtrl(split1,-1)
	self.list=wxListCtrl(split2,-1,style=wxLC_REPORT|wxSUNKEN_BORDER)
	self.data=wxHtmlWindow(split2,-1)

        # attach the panes to the frame
        split1.SplitVertically(self.tree, split2)
        split2.SplitHorizontally(self.list, self.data)
        self.SetTopWindow(frame)
        frame.Show(true)

	# resize
        split1.SetMinimumPaneSize(20)
        split2.SetMinimumPaneSize(20)
	split1.SetSashPosition(300,true)
	split2.SetSashPosition(200)

        # wire up the events
        EVT_TREE_SEL_CHANGED(self, self.tree.GetId(), self.selectFeed)
        EVT_LIST_ITEM_SELECTED(self, self.list.GetId(), self.selectItem)
        return true

    # load a list of subscriptions from an OPML file
    def load(self,files):
	root = self.tree.AddRoot("Feeds")

	for file in files:
            self.mySubs = opml(file)
            for name in self.mySubs.names():
	        child=self.tree.AppendItem(root,self.mySubs.text(name))
	        self.tree.SetPyData(child,self.mySubs.outline[name])

        self.tree.Expand(root)

    # select a single feed and display titles from each item
    def selectFeed(self, event):
	self.list.DeleteAllItems()
	if not self.list.GetColumn(0): self.list.InsertColumn(0, 'Title')

	outline = self.tree.GetPyData(event.GetItem())
	self.items=rssparser.parse(outline['xmlUrl'])['items']
	for item in self.items:
	    if 'title' in item: self.list.InsertStringItem(0,item['title'])

	self.list.SetColumnWidth(0,wxLIST_AUTOSIZE_USEHEADER)

    # show the html description for a single item
    def selectItem(self, event):
	item=self.items[event.GetIndex()]
	self.data.SetPage(item['description'])

if __name__ == '__main__':
    app = wx3pa(0)
    app.load(sys.argv[1:] or 
        [r'http://radio.weblogs.com/0101679/gems/mySubscriptions.opml'])
    app.MainLoop()