diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
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+              GNU GENERAL PUBLIC LICENSE
+                Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+              END OF TERMS AND CONDITIONS
+
+     How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+
+
diff --git a/Main.hs b/Main.hs
new file mode 100644
--- /dev/null
+++ b/Main.hs
@@ -0,0 +1,31 @@
+-- Author:     Andy Stewart <lazycat.manatee@gmail.com>
+-- Maintainer: Andy Stewart <lazycat.manatee@gmail.com>
+-- 
+-- Copyright (C) 2010 Andy Stewart, all rights reserved.
+-- 
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- any later version.
+-- 
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+-- 
+-- You should have received a copy of the GNU General Public License
+-- along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+{-# LANGUAGE DeriveDataTypeable, ScopedTypeVariables #-}
+{-# LANGUAGE OverloadedStrings #-}
+module Main where
+
+import Control.Applicative hiding (empty)
+import Manatee.Core.Render
+import Manatee.Core.Types
+import Manatee.Extension.Reader
+
+-- | Irc client render process.
+main :: IO ()
+main = 
+    startupRender (\ pagePath client pageId -> PageBufferWrap <$> readerBufferNew pagePath client pageId)
diff --git a/Manatee/Extension/Reader.hs b/Manatee/Extension/Reader.hs
new file mode 100644
--- /dev/null
+++ b/Manatee/Extension/Reader.hs
@@ -0,0 +1,26 @@
+-- Author:     Andy Stewart <lazycat.manatee@gmail.com>
+-- Maintainer: Andy Stewart <lazycat.manatee@gmail.com>
+-- 
+-- Copyright (C) 2010 Andy Stewart, all rights reserved.
+-- 
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- any later version.
+-- 
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+-- 
+-- You should have received a copy of the GNU General Public License
+-- along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+module Manatee.Extension.Reader (
+  module Manatee.Extension.Reader.ReaderBuffer,
+  module Manatee.Extension.Reader.ReaderView,
+) where
+
+import Manatee.Extension.Reader.ReaderBuffer
+import Manatee.Extension.Reader.ReaderView
+
diff --git a/Manatee/Extension/Reader/PageMode.hs b/Manatee/Extension/Reader/PageMode.hs
new file mode 100644
--- /dev/null
+++ b/Manatee/Extension/Reader/PageMode.hs
@@ -0,0 +1,32 @@
+-- Author:     Andy Stewart <lazycat.manatee@gmail.com>
+-- Maintainer: Andy Stewart <lazycat.manatee@gmail.com>
+-- 
+-- Copyright (C) 2010 Andy Stewart, all rights reserved.
+-- 
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- any later version.
+-- 
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+-- 
+-- You should have received a copy of the GNU General Public License
+-- along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+module Manatee.Extension.Reader.PageMode where
+
+import Manatee.Core.Types
+
+import qualified Data.Map as M
+
+-- | Reader mode.
+readerMode :: PageMode
+readerMode =
+  PageMode {pageModeName        = "Reader"
+           ,pageModeRegexp      = ""
+           ,pageModeKeymap      = M.empty
+           ,pageModeLoad        = \_ -> return ()}
+
diff --git a/Manatee/Extension/Reader/ReaderBuffer.hs b/Manatee/Extension/Reader/ReaderBuffer.hs
new file mode 100644
--- /dev/null
+++ b/Manatee/Extension/Reader/ReaderBuffer.hs
@@ -0,0 +1,240 @@
+-- Author:     Andy Stewart <lazycat.manatee@gmail.com>
+-- Maintainer: Andy Stewart <lazycat.manatee@gmail.com>
+-- 
+-- Copyright (C) 2010 Andy Stewart, all rights reserved.
+-- 
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- any later version.
+-- 
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+-- 
+-- You should have received a copy of the GNU General Public License
+-- along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE DeriveDataTypeable #-}
+module Manatee.Extension.Reader.ReaderBuffer where
+
+import Codec.Binary.UTF8.String
+import Control.Applicative
+import Control.Concurrent
+import Control.Concurrent.STM 
+import Control.Monad
+import DBus.Client hiding (Signal)
+import Data.Map (Map)
+import Data.Maybe (fromMaybe)
+import Data.Ord (comparing)
+import Data.Typeable
+import Graphics.UI.Gtk.General.General
+import Graphics.UI.Gtk.ModelView.TreeSortable
+import Manatee.Core.Types
+import Manatee.Extension.Reader.PageMode
+import Manatee.Toolkit.General.List
+import Manatee.Toolkit.General.Map
+import Manatee.Toolkit.General.Maybe
+import Manatee.Toolkit.General.STM
+import Network.Curl.Download
+import Text.Feed.Query
+import Text.Feed.Types
+
+import qualified Data.Map as M
+
+data ReaderBuffer =
+    ReaderBuffer {readerBufferName              :: String
+                 ,readerBufferClient            :: Client
+                 ,readerBufferPageId            :: PageId
+                 ,readerBufferMode              :: PageMode
+                 ,readerBufferFeedInfos         :: Map FeedName FeedInfo
+                 ,readerBufferFeedTreeItems     :: TVar [FeedTreeItem]
+                 ,readerBufferFeedTreeOptions   :: [(TreeItemOption, SortColumnId)]
+                 ,readerBufferFeedNavItems      :: TVar (Map FeedName [FeedNavItem])
+                 ,readerBufferFeedNavOptions    :: [(NavItemOption, SortColumnId)]
+                 ,readerBufferBroadcastChannel  :: TChan ReaderTChanSignal
+                 }
+    deriving Typeable
+
+data ReaderTChanSignal = FeedUpdated FeedName
+                         deriving (Show, Eq, Ord)
+
+data Interval = Second Int
+              | Minute Int
+              | Hour   Int
+              | Day    Int
+                deriving (Show, Eq, Ord)
+
+type FetchNumber = Int
+type FeedUrl     = String
+type FeedName    = String
+
+data FeedTreeItem = 
+    FeedTreeItem {ftiName         :: String
+                 ,ftiUnreadNumber :: Int
+                 ,ftiUpdateTime   :: Int
+                 }
+    deriving Show
+
+data TreeItemOption = TName
+                      deriving (Eq, Show, Read)
+
+class TreeItemClass a where
+  tiGetColumnTitle        :: a -> String
+  tiGetCellText           :: a -> FeedTreeItem -> String
+  tiGetCellXAlign         :: a -> Float
+  tiCompareRow            :: a -> FeedTreeItem -> FeedTreeItem -> IO Ordering
+
+instance TreeItemClass TreeItemOption where
+  tiGetColumnTitle TName         = "Feed" 
+  tiGetCellText TName item       = ftiName item ++ " (" ++ show (ftiUnreadNumber item) ++ ")"
+  tiGetCellXAlign TName          = 0.0
+  tiCompareRow TName item1 item2 = return $ comparing ftiName item1 item2
+
+data FeedNavItem = 
+    FeedNavItem {fniFeedName    :: String
+                ,fniTitle       :: String
+                ,fniTime        :: String
+                ,fniUrl         :: String
+                ,fniHasRead     :: Bool
+                }
+    deriving Show
+
+data NavItemOption = NTitle | NTime 
+                   deriving (Eq, Show, Read)
+
+class NavItemClass a where
+  niGetColumnTitle        :: a -> String
+  niGetColumnMaxWidth     :: a -> Maybe Int
+  niGetCellText           :: a -> FeedNavItem -> String
+  niGetCellXAlign         :: a -> Float
+  niCompareRow            :: a -> FeedNavItem -> FeedNavItem -> IO Ordering
+
+instance NavItemClass NavItemOption where
+  niGetColumnTitle NTitle       = "Title" 
+  niGetColumnTitle NTime        = "Time"
+
+  niGetColumnMaxWidth NTitle = Just 500
+  niGetColumnMaxWidth NTime  = Just 50
+
+  niGetCellText NTitle  item    = decodeString $ fniTitle item
+  niGetCellText NTime   item    = fniTime item
+
+  niGetCellXAlign NTitle        = 0.0
+  niGetCellXAlign NTime         = 0.0
+  
+  niCompareRow NTitle   item1 item2 = return $ comparing fniTitle item1 item2
+  niCompareRow NTime    item1 item2 = return $ comparing fniTime item1 item2 
+
+data FeedInfo =
+    FeedInfo {feedUrl         :: FeedUrl           -- feed url
+             ,feedInterval    :: [Interval]        -- interval time between retrievals
+             }
+    deriving Show
+
+-- | Create reader buffer.
+readerBufferNew :: String -> Client -> PageId -> IO ReaderBuffer
+readerBufferNew path client pageId = do
+  buffer <- ReaderBuffer <$> pure path
+                         <*> pure client
+                         <*> pure pageId
+                         <*> pure readerMode
+                         <*> pure feedInfos
+                         <*> newTVarIO (map (\ (name, _) -> FeedTreeItem name 0 0) $ M.toList feedInfos)
+                         <*> pure (pairPred [TName])
+                         <*> newTVarIO M.empty
+                         <*> pure (pairPred [NTitle, NTime])
+                         <*> (newTChanIO :: IO (TChan ReaderTChanSignal))
+
+  -- Fetch feed.
+  readerBufferFetchFeed buffer
+
+  return buffer
+
+-- | Fetch feed.
+readerBufferFetchFeed :: ReaderBuffer -> IO ()
+readerBufferFetchFeed buffer@(ReaderBuffer {readerBufferFeedInfos = infos}) = 
+  forM_ (M.toList infos) $ \ (feedName, _) -> 
+    readerBufferUpdateFeed buffer feedName
+
+-- | Update feed.
+readerBufferUpdateFeed :: ReaderBuffer -> FeedName -> IO ()
+readerBufferUpdateFeed buffer@(ReaderBuffer {readerBufferFeedInfos = infos} )
+                       feedName = do
+  forkIO $ 
+    findMinMatch infos (\ name _ -> name == feedName) 
+      ?>= \ (_, FeedInfo {feedUrl          = url
+                         ,feedInterval     = interval}) -> do
+        -- Download feed.
+        feed <- openAsFeed url
+
+        case feed of
+          -- Pick feed information after download feed.
+          Right f -> do
+              putStrLn $ "Feed " ++ feedName ++ " is updated."
+              pickFeedInfo buffer feedName f
+              writeTChanIO (readerBufferBroadcastChannel buffer) (FeedUpdated feedName)
+          -- Or print error information.
+          Left err -> putStrLn err
+
+        -- Start next update cycle.
+        timeoutAddFull (readerBufferUpdateFeed buffer feedName >> return False) 
+                       priorityDefault 
+                       (calculateIntervalTime interval)
+        return ()
+
+  return ()
+
+-- | Pick information from feed.
+pickFeedInfo :: ReaderBuffer -> FeedName -> Feed -> IO () 
+pickFeedInfo (ReaderBuffer {readerBufferFeedNavItems = navItems}) 
+          name feed = 
+  modifyTVarIO navItems $ \items -> 
+      let newNavItems =
+              map (\item -> 
+                       FeedNavItem name
+                                   (fromMaybe "" $ getItemTitle item)
+                                   (fromMaybe "" $ getItemDate item)
+                                   (fromMaybe "" $ getItemLink item)
+                                   False
+                  ) $ getFeedItems feed
+      in M.insert name newNavItems items
+
+-- | Calculate interval time.
+calculateIntervalTime :: [Interval] -> Int
+calculateIntervalTime [] = 0
+calculateIntervalTime (x:xs) = time + calculateIntervalTime xs
+    where 
+      time   = second * 1000    -- convert to millisecond
+      second = case x of        -- convert to second
+                 Second t -> t
+                 Minute t -> t * 60
+                 Hour   t -> t * 60 * 60
+                 Day    t -> t * 60 * 60 * 24
+
+-- | Temp feed information, instead with user customize option after customize system complete. 
+feedInfos :: Map FeedName FeedInfo 
+feedInfos = 
+  M.fromList [("Planet Haskell"
+              ,FeedInfo "http://planet.haskell.org/rss20.xml" 
+                        [Minute 30])
+             ,("HackageDB recent additions"
+              ,FeedInfo "http://hackage.haskell.org/packages/archive/recent.rss"
+                        [Minute 20])
+             ,("Planet Emacsen"
+              ,FeedInfo "http://planet.emacsen.org/atom.xml"
+                        [Minute 20])
+             ,("Yeeyan-Science"
+              ,FeedInfo "http://feed.feedsky.com/yeeyan-science"
+                        [Minute 20])
+             ,("Yeeyan-Tech"
+              ,FeedInfo "http://feed.feedsky.com/yeeyan-tech"
+                        [Minute 20])
+             -- ,("Google Arcanum"
+             --  ,FeedInfo "http://rss.guao.cc/aggregator/rss"
+             --            [Minute 20])
+             ]
+
+
diff --git a/Manatee/Extension/Reader/ReaderView.hs b/Manatee/Extension/Reader/ReaderView.hs
new file mode 100644
--- /dev/null
+++ b/Manatee/Extension/Reader/ReaderView.hs
@@ -0,0 +1,517 @@
+-- Author:     Andy Stewart <lazycat.manatee@gmail.com>
+-- Maintainer: Andy Stewart <lazycat.manatee@gmail.com>
+-- 
+-- Copyright (C) 2010 Andy Stewart, all rights reserved.
+-- 
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- any later version.
+-- 
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+-- 
+-- You should have received a copy of the GNU General Public License
+-- along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE DeriveDataTypeable #-}
+module Manatee.Extension.Reader.ReaderView where
+
+import Control.Applicative
+import Control.Concurrent.STM 
+import Control.Monad
+import Data.Map (Map)
+import Data.Text.Lazy (Text)
+import Data.Typeable
+import Graphics.UI.Gtk hiding (Statusbar, statusbarNew, get)
+import Graphics.UI.Gtk.Gdk.SerializedEvent
+import Graphics.UI.Gtk.WebKit.WebFrame
+import Graphics.UI.Gtk.WebKit.WebView
+import Manatee.Core.DBus
+import Manatee.Core.PageView
+import Manatee.Core.Types
+import Manatee.Extension.Reader.ReaderBuffer
+import Manatee.Toolkit.General.Map
+import Manatee.Toolkit.General.Maybe
+import Manatee.Toolkit.Gtk.Concurrent
+import Manatee.Toolkit.Gtk.Gtk
+import Manatee.Toolkit.Gtk.ModelView
+import Manatee.Toolkit.Gtk.ScrolledWindow
+
+import qualified Data.Map as M
+
+data ReaderView =
+    ReaderView {readerViewPlugId                :: TVar PagePlugId
+               ,readerViewScrolledWindow        :: ScrolledWindow
+               ,readerViewTreeView              :: TreeView
+               ,readerViewTreeFrame             :: Frame
+               ,readerViewTreeScrolledWindow    :: ScrolledWindow
+               ,readerViewTreeListStore         :: ListStore FeedTreeItem
+               ,readerViewTreeSortModel         :: TypedTreeModelSort FeedTreeItem
+               ,readerViewNavView               :: TreeView
+               ,readerViewNavFrame              :: Frame
+               ,readerViewNavScrolledWindow     :: ScrolledWindow
+               ,readerViewNavListStore          :: ListStore FeedNavItem
+               ,readerViewNavSortModel          :: TypedTreeModelSort FeedNavItem
+               ,readerViewWebView               :: WebView
+               ,readerViewWebFrame              :: Frame
+               ,readerViewWebScrolledWindow     :: ScrolledWindow
+               ,readerViewHPaned                :: HPaned
+               ,readerViewVPaned                :: VPaned
+               ,readerViewBuffer                :: ReaderBuffer
+               ,readerViewBroadcastChannel      :: ViewChannel ReaderTChanSignal
+               }
+    deriving Typeable
+
+instance PageBuffer ReaderBuffer where
+  pageBufferGetName             = return . readerBufferName
+  pageBufferSetName _ _         = return ()
+  pageBufferClient              = readerBufferClient
+  pageBufferCreateView a pId    = PageViewWrap <$> readerViewNew a pId
+  pageBufferMode                = readerBufferMode
+
+instance PageView ReaderView where
+    pageViewBuffer              = PageBufferWrap . readerViewBuffer
+    pageViewPlugId              = readerViewPlugId
+    pageViewFocus               = widgetGrabFocus . readerViewHPaned
+    pageViewScrolledWindow      = readerViewScrolledWindow
+    pageViewHandleKeyAction     = readerViewHandleKeyAction
+
+-- | Create reader view.
+readerViewNew :: ReaderBuffer -> PagePlugId -> IO ReaderView
+readerViewNew buffer plugId = do
+  -- Create plug id.
+  pId <- newTVarIO plugId
+
+  -- Create frame. 
+  treeFrame <- frameNew
+  navFrame  <- frameNew
+  webFrame  <- frameNew
+
+  -- Create scrolled window.
+  scrolledWindow     <- scrolledWindowNew_
+  treeScrolledWindow <- scrolledWindowNew_
+  navScrolledWindow  <- scrolledWindowNew_
+  webScrolledWindow  <- scrolledWindowNew_
+
+  -- Create paned.
+  vPaned <- vPanedNew
+  hPaned <- hPanedNew
+
+  -- Create view.
+  treeView <- treeViewNew
+  navView  <- treeViewNew
+  webView  <- webViewNew
+
+  -- List store and sort model.
+  treeListStore <- listStoreNew []
+  treeSortModel <- treeModelSortNewWithModel treeListStore
+  
+  navListStore <- listStoreNew []
+  navSortModel <- treeModelSortNewWithModel navListStore
+
+  -- Connect.
+  treeScrolledWindow `containerAdd` treeView
+  navScrolledWindow `containerAdd` navView
+  webScrolledWindow `containerAdd` webView
+
+  treeFrame `containerAdd` treeScrolledWindow
+  navFrame `containerAdd` navScrolledWindow
+  webFrame `containerAdd` webScrolledWindow
+
+  scrolledWindowAddWithViewport scrolledWindow vPaned
+
+  panedPack1 hPaned treeFrame True True
+  panedPack2 hPaned navFrame  True True 
+  panedPack1 vPaned hPaned    True True
+  panedPack2 vPaned webFrame  True True
+
+  -- Set default size.
+  hPaned `after` realize $ do
+    -- Adjust width.
+    toplevelWidget <- widgetGetToplevel hPaned
+    (width, _)     <- widgetGetSize toplevelWidget
+    let widthLeft  = truncate (fromIntegral width / 4)
+        widthRight = width - widthLeft
+    widgetSetSizeRequest treeFrame widthLeft  (-1)
+    widgetSetSizeRequest navFrame  widthRight (-1)
+  vPaned `after` realize $ do
+    -- Adjust height.
+    toplevelWidget <- widgetGetToplevel hPaned
+    (_, height)    <- widgetGetSize toplevelWidget
+    let heightUp     = truncate (fromIntegral height / 4)
+        heightBottom = height - heightUp
+    widgetSetSizeRequest hPaned   (-1) heightUp
+    widgetSetSizeRequest webFrame (-1) heightBottom
+
+  -- Duplicate broadcast channel.
+  channel <- createViewChannel (readerBufferBroadcastChannel buffer) treeView
+
+  -- Build reader view.
+  let readerView = ReaderView pId scrolledWindow 
+                              treeView treeFrame treeScrolledWindow treeListStore treeSortModel
+                              navView navFrame navScrolledWindow navListStore navSortModel
+                              webView webFrame webScrolledWindow
+                              hPaned vPaned 
+                              buffer 
+                              channel
+
+  -- Read channel.
+  readerViewListenChannel readerView
+
+  -- Draw reader view.
+  readerViewDraw readerView
+
+  -- Focus first feed.
+  readerViewSelectFirstFeed readerView
+
+  -- Signal handle.
+
+  -- Update navigation view when tree view cursor changed.
+  treeView `on` cursorChanged $ readerViewUpdateNavItems readerView
+  -- Browse page when navigation view cursor changed.
+  navView `on` cursorChanged $ readerViewBrowseItemLink readerView
+  -- Create new tab when request open new window.
+  webView `on` createWebView $ readerViewOpenUrl readerView
+
+  return readerView
+
+-- | Draw view.
+readerViewDraw :: ReaderView -> IO ()
+readerViewDraw view = do
+  -- Draw tree item.
+  let buffer = readerViewBuffer view
+  treeItems <- readTVarIO $ readerBufferFeedTreeItems buffer
+  let treeView  = readerViewTreeView view
+      store     = readerViewTreeListStore view
+      model     = readerViewTreeSortModel view
+      
+  -- Append to list store.
+  listStoreClear store
+  forM_ treeItems (listStoreAppend store) 
+
+  -- Set tree view model.
+  treeViewSetModel treeView model
+
+  -- Clean tree view.
+  treeViewRemoveColumns treeView
+
+  -- Add column file info to tree view.
+  forM_ (readerBufferFeedTreeOptions buffer) (readerViewTreeViewAddColumn treeView store model)
+
+  return ()
+
+-- | Listen broadcast channel for draw view synchronous.
+readerViewListenChannel :: ReaderView -> IO ()
+readerViewListenChannel view = 
+  listenViewChannel (readerViewBroadcastChannel view) $ \signal -> 
+      case signal of
+        FeedUpdated name -> 
+            treeViewGetSelectedValue (readerViewTreeView view) 
+                                     (readerViewTreeSortModel view)
+                                     (readerViewTreeListStore view)
+            >?>= \itemInfo -> 
+                when (name == ftiName itemInfo) $                        
+                     readerViewDrawNavItems view name
+
+-- | Browse item link.
+readerViewBrowseItemLink :: ReaderView -> IO ()
+readerViewBrowseItemLink view = do
+  let webView = readerViewWebView view
+  treeViewGetSelectedValue (readerViewNavView view)
+                           (readerViewNavSortModel view)
+                           (readerViewNavListStore view)
+    >?>= \ itemInfo -> do
+      let url = fniUrl itemInfo
+      unless (null url) $ do
+           -- Stop current loading first.
+           webViewStopLoading webView
+           -- Load new url.
+           webViewLoadUri webView url
+
+-- | Update navigation times.
+readerViewUpdateNavItems :: ReaderView -> IO ()
+readerViewUpdateNavItems view =
+  treeViewGetSelectedValue (readerViewTreeView view)
+                           (readerViewTreeSortModel view)
+                           (readerViewTreeListStore view)
+    >?>= \ itemInfo -> 
+      readerViewDrawNavItems view (ftiName itemInfo)
+
+-- | Draw navigation items.
+readerViewDrawNavItems :: ReaderView -> FeedName -> IO ()
+readerViewDrawNavItems view feedName = do
+  let navView = readerViewNavView view
+      buffer = readerViewBuffer view
+      store = readerViewNavListStore view
+      model = readerViewNavSortModel view
+  navItems <- readTVarIO $ readerBufferFeedNavItems buffer
+  case findMinMatch navItems (\ name _ -> name == feedName) of
+    Just (_, items) -> do
+      -- Append to list store.
+      listStoreClear store
+      forM_ items (listStoreAppend store) 
+
+      -- Set tree view model.
+      treeViewSetModel navView model
+
+      -- Clean tree view.
+      treeViewRemoveColumns navView
+
+      -- Add column file info to tree view.
+      forM_ (readerBufferFeedNavOptions buffer) (readerViewNavViewAddColumn navView store model)
+    Nothing -> return ()
+
+  -- Browse first item and link.
+  readerViewSelectFirstItem view
+  readerViewBrowseItemLink view
+
+-- | Add column.
+readerViewTreeViewAddColumn :: (TreeItemClass t,
+                               TreeViewClass self1,
+                               TreeModelClass self,
+                               TreeModelSortClass self,
+                               TypedTreeModelClass model,
+                               TreeSortableClass self) =>
+                              self1
+                            -> model FeedTreeItem
+                            -> self
+                            -> (t, SortColumnId)
+                            -> IO ()
+readerViewTreeViewAddColumn treeView model sortModel option@(info,sortId) = do
+  readerViewTreeViewSetSortFunc model sortModel option
+
+  let name = tiGetColumnTitle info
+  tvc <- treeViewAddColumnWithTitle treeView name sortId
+  
+  cell <- cellRendererTextNew
+  treeViewColumnPackStart tvc cell True
+
+  readerViewTreeViewSetCellText tvc cell model sortModel info
+
+-- | Set sort function.
+readerViewTreeViewSetSortFunc :: (TreeSortableClass self,
+                                 TypedTreeModelClass model,
+                                 TreeItemClass a) =>
+                                model FeedTreeItem
+                              -> self
+                              -> (a, SortColumnId)
+                              -> IO ()
+readerViewTreeViewSetSortFunc model sortModel (info, sortId) = 
+  treeSortableSetSortFunc sortModel sortId $ \iter1 iter2 -> do
+    row1 <- treeModelGetRow model iter1
+    row2 <- treeModelGetRow model iter2
+    tiCompareRow info row1 row2
+
+-- | Set cell text.
+readerViewTreeViewSetCellText :: (CellLayoutClass self,
+                                 CellRendererTextClass cell,
+                                 TreeModelClass model,
+                                 TreeModelSortClass model,
+                                 TypedTreeModelClass model1,
+                                 TreeItemClass a) =>
+                                self
+                              -> cell
+                              -> model1 FeedTreeItem
+                              -> model
+                              -> a
+                              -> IO ()
+readerViewTreeViewSetCellText tvc cell model sortModel info = 
+    cellLayoutSetAttributeFunc tvc cell sortModel $ \iter -> do
+      row <- treeModelSortGetRow model sortModel iter
+      set cell [cellText   := tiGetCellText info row
+               ,cellXAlign := tiGetCellXAlign info]
+
+-- | Add column.
+readerViewNavViewAddColumn :: (NavItemClass t,
+                              TreeViewClass self1,
+                              TreeModelClass self,
+                              TreeModelSortClass self,
+                              TypedTreeModelClass model,
+                              TreeSortableClass self) =>
+                             self1
+                           -> model FeedNavItem
+                           -> self
+                           -> (t, SortColumnId)
+                           -> IO ()
+readerViewNavViewAddColumn treeView model sortModel option@(info,sortId) = do
+  readerViewNavViewSetSortFunc model sortModel option
+
+  let name = niGetColumnTitle info
+      maxWidth = niGetColumnMaxWidth info
+  tvc <- treeViewAddColumnWithTitle treeView name sortId
+  maxWidth ?>= \width -> treeViewColumnSetMaxWidth tvc width
+  
+  cell <- cellRendererTextNew
+  treeViewColumnPackStart tvc cell True
+
+  readerViewNavViewSetCellText tvc cell model sortModel info
+
+-- | Set sort function.
+readerViewNavViewSetSortFunc :: (TreeSortableClass self,
+                                TypedTreeModelClass model,
+                                NavItemClass a) =>
+                               model FeedNavItem
+                             -> self
+                             -> (a, SortColumnId)
+                             -> IO ()
+readerViewNavViewSetSortFunc model sortModel (info, sortId) = 
+  treeSortableSetSortFunc sortModel sortId $ \iter1 iter2 -> do
+    row1 <- treeModelGetRow model iter1
+    row2 <- treeModelGetRow model iter2
+    niCompareRow info row1 row2
+
+-- | Set cell text.
+readerViewNavViewSetCellText :: (CellLayoutClass self,
+                                CellRendererTextClass cell,
+                                TreeModelClass model,
+                                TreeModelSortClass model,
+                                TypedTreeModelClass model1,
+                                NavItemClass a) =>
+                               self
+                             -> cell
+                             -> model1 FeedNavItem
+                             -> model
+                             -> a
+                             -> IO ()
+readerViewNavViewSetCellText tvc cell model sortModel info = 
+    cellLayoutSetAttributeFunc tvc cell sortModel $ \iter -> do
+      row <- treeModelSortGetRow model sortModel iter
+      set cell [cellText   := niGetCellText info row
+               ,cellXAlign := niGetCellXAlign info]
+
+-- | Handle key action.
+readerViewHandleKeyAction :: ReaderView -> Text -> SerializedEvent -> IO ()  
+readerViewHandleKeyAction view keystoke sEvent = 
+  case M.lookup keystoke readerViewKeymap of
+    Just action -> action view
+    Nothing -> widgetPropagateEvent (readerViewHPaned view) sEvent
+
+-- | Select next feed.
+readerViewSelectNextFeed :: ReaderView -> IO ()
+readerViewSelectNextFeed view = do
+  atLast <- treeViewAtLastToplevelNode (readerViewTreeView view)
+  unless atLast $ 
+    treeViewFocusNextToplevelNode (readerViewTreeView view) 
+    
+-- | Select previous feed.
+readerViewSelectPrevFeed :: ReaderView -> IO ()    
+readerViewSelectPrevFeed view = do
+  atFirst <- treeViewAtFirstToplevelNode (readerViewTreeView view)
+  unless atFirst $
+    treeViewFocusPrevToplevelNode (readerViewTreeView view) 
+
+-- | Select first feed.
+readerViewSelectFirstFeed :: ReaderView -> IO ()
+readerViewSelectFirstFeed view = do
+  atFirst <- treeViewAtFirstToplevelNode (readerViewTreeView view)
+  unless atFirst $
+    treeViewFocusFirstToplevelNode (readerViewTreeView view) 
+
+-- | Select last feed.
+readerViewSelectLastFeed :: ReaderView -> IO ()
+readerViewSelectLastFeed view = do
+  atLast <- treeViewAtLastToplevelNode (readerViewTreeView view)
+  unless atLast $ 
+    treeViewFocusLastToplevelNode (readerViewTreeView view) 
+
+-- | Select next item.
+readerViewSelectNextItem :: ReaderView -> IO ()
+readerViewSelectNextItem view = do
+  atLast <- treeViewAtLastToplevelNode (readerViewNavView view)
+  unless atLast $ 
+    treeViewFocusNextToplevelNode (readerViewNavView view) 
+    
+-- | Select previous item.
+readerViewSelectPrevItem :: ReaderView -> IO ()    
+readerViewSelectPrevItem view = do
+  atFirst <- treeViewAtFirstToplevelNode (readerViewNavView view)
+  unless atFirst $
+    treeViewFocusPrevToplevelNode (readerViewNavView view) 
+
+-- | Select first item.
+readerViewSelectFirstItem :: ReaderView -> IO ()
+readerViewSelectFirstItem view = do
+  atFirst <- treeViewAtFirstToplevelNode (readerViewNavView view)
+  unless atFirst $
+    treeViewFocusFirstToplevelNode (readerViewNavView view) 
+
+-- | Select last item.
+readerViewSelectLastItem :: ReaderView -> IO ()
+readerViewSelectLastItem view = do
+  atLast <- treeViewAtLastToplevelNode (readerViewNavView view)
+  unless atLast $ 
+    treeViewFocusLastToplevelNode (readerViewNavView view) 
+
+-- | Scroll web view step up.
+readerViewScrollWebViewStepUp :: ReaderView -> IO ()
+readerViewScrollWebViewStepUp view =
+  scrolledWindowScrollVerticalStep True (readerViewWebScrolledWindow view) 
+
+-- | Scroll web view step down.
+readerViewScrollWebViewStepDown :: ReaderView -> IO ()
+readerViewScrollWebViewStepDown view =
+  scrolledWindowScrollVerticalStep False (readerViewWebScrolledWindow view)
+
+-- | Scroll web view page up.
+readerViewScrollWebViewPageUp :: ReaderView -> IO ()
+readerViewScrollWebViewPageUp view =
+  scrolledWindowScrollVerticalPage True (readerViewWebScrolledWindow view)
+
+-- | Scroll web view page down.
+readerViewScrollWebViewPageDown :: ReaderView -> IO ()
+readerViewScrollWebViewPageDown view =
+  scrolledWindowScrollVerticalPage False (readerViewWebScrolledWindow view)
+
+-- | New tab in browser.
+readerViewOpenUrl :: ReaderView -> WebFrame -> IO WebView
+readerViewOpenUrl view _ = do
+  -- Because WebKit API will return new webView by signal `createWebView`,
+  -- we use `webViewNew` build temporary webView to intercept new uri,
+  -- then we send NewTab DBus signal and stop loading temporary webView.
+  webView <- webViewNew
+  webView `on` loadCommitted $ \ frame -> do
+    -- Intercept new uri.
+    webFrameGetUri frame >?>= \uri -> 
+      mkDaemonSignal (pageViewClient view) NewTab (NewTabArgs "PageBrowser" uri)
+    -- Stop loading.
+    webViewStopLoading webView
+
+  -- Don't use WebFrame in signal `createWebView` to return webView,
+  -- otherwise will change current tab.
+  return webView
+
+-- | Browse item in browser module.
+readerViewBrowseInBrowser :: ReaderView -> IO ()
+readerViewBrowseInBrowser view = 
+  treeViewGetSelectedValue (readerViewNavView view)
+                           (readerViewNavSortModel view)
+                           (readerViewNavListStore view)
+    >?>= \ itemInfo -> do
+      let url = fniUrl itemInfo
+      unless (null url) $   
+             mkDaemonSignal (pageViewClient view) NewTab (NewTabArgs "PageBrowser" url)
+
+-- | Keymap.
+readerViewKeymap :: Map Text (ReaderView -> IO ())
+readerViewKeymap = 
+    M.fromList 
+         [("n",         readerViewSelectNextFeed)
+         ,("p",         readerViewSelectPrevFeed)
+         ,("N",         readerViewSelectLastFeed)
+         ,("P",         readerViewSelectFirstFeed)
+         ,("j",         readerViewSelectNextItem)
+         ,("k",         readerViewSelectPrevItem)
+         ,("Down",      readerViewSelectNextItem)
+         ,("Up",        readerViewSelectPrevItem)
+         ,("J",         readerViewSelectLastItem)
+         ,("K",         readerViewSelectFirstItem)
+         ,(",",         readerViewScrollWebViewStepUp)
+         ,(".",         readerViewScrollWebViewStepDown)
+         ,(" ",         readerViewScrollWebViewPageUp)
+         ,("b",         readerViewScrollWebViewPageDown)
+         ,("m",         readerViewBrowseInBrowser)
+         ]
diff --git a/Setup.hs b/Setup.hs
new file mode 100644
--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,18 @@
+import Distribution.Simple
+import Manatee.Core.Config
+import Manatee.Core.Types
+import Manatee.Extension.Reader.PageMode
+
+import qualified Data.Map as M
+
+main = defaultMainWithHooks 
+       simpleUserHooks {
+         -- Update PageTypeRule after install successful.
+         postInst = \ _ _ _ _ -> do
+             (PageTypeRule rule) <- readConfig pageTypeRulePath (PageTypeRule M.empty)
+             writeConfig pageTypeRulePath (PageTypeRule (M.insert "PageReader" "manatee-reader" rule))
+             -- Update PageModeRule.
+             (PageModeRule modeRule) <- readConfig pageModeRulePath (PageModeRule M.empty)
+             writeConfig pageModeRulePath (PageModeRule 
+                                                (M.insert "PageReader" (Left $ pageModeName readerMode) modeRule))
+       }
diff --git a/manatee-reader.cabal b/manatee-reader.cabal
new file mode 100644
--- /dev/null
+++ b/manatee-reader.cabal
@@ -0,0 +1,38 @@
+name:			manatee-reader
+version:		0.0.1
+Cabal-Version:	>= 1.6
+license:		GPL-3
+license-file:	LICENSE
+copyright:		(c) 2009 ~ 2010 Andy Stewart
+synopsis:		Feed reader extension for Manatee.
+description:    manatee-reader is feed reader extension for Manatee (Haskell/Gtk+ Integrated Live Environment)
+author:			Andy Stewart
+maintainer:		Andy Stewart <lazycat.manatee@gmail.com>
+stability:		provisional
+category:		Manatee, RSS/Atom Reader, Feed, RSS, Atom
+
+tested-with:	GHC==6.12.3
+build-type:		Custom
+
+Source-Repository head
+  type:         darcs
+  location:     http://patch-tag.com/r/AndyStewart/manatee-reader
+  
+Library
+     build-depends: base >= 4 && < 5, manatee-core >= 0.0.1, dbus-client >= 0.3 && < 0.4, stm >= 2.1.2.0,
+                    containers >= 0.3.0.0, gtk-serialized-event >= 0.12.0, gtk >= 0.12.0,
+                    text >= 0.7.1.0, webkit >= 0.12.0, feed >= 0.3.7, download-curl >= 0.1.2,
+                    utf8-string >= 0.3.4
+     exposed-modules:
+         Manatee.Extension.Reader
+         Manatee.Extension.Reader.ReaderBuffer
+         Manatee.Extension.Reader.ReaderView
+         Manatee.Extension.Reader.PageMode
+     other-modules:							
+     extensions:  
+     ghc-options: -fwarn-unused-matches -fwarn-unused-binds -fwarn-unused-imports -fwarn-overlapping-patterns -fwarn-duplicate-exports -fwarn-unrecognised-pragmas -fwarn-hi-shadowing 
+     
+Executable manatee-reader
+     main-is: Main.hs
+
+     ghc-options: -threaded
