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[rhythmbox] context: Add tab with links to websites for album and artist info (bug #636550)

commit 8b30aa877b953e461f8090805927a9ba8370b4f8
Author: Kenny Meyer <knny myer gmail com>
Date:   Sun Dec 5 09:23:35 2010 -0300

    context: Add tab with links to websites for album and artist info (bug #636550)

 plugins/context/Makefile.am                  |    6 +-
 plugins/context/context/ContextView.py       |    4 +
 plugins/context/context/LinksTab.py          |  181 ++++++++++++++++++++++++++
 plugins/context/context/Makefile.am          |    1 +
 plugins/context/img/links/Allmusic16x16.png  |  Bin 0 -> 803 bytes
 plugins/context/img/links/Discogs16x16.png   |  Bin 0 -> 771 bytes
 plugins/context/img/links/Wikipedia16x16.png |  Bin 0 -> 381 bytes
 plugins/context/tmpl/links-tmpl.html         |   30 +++++
 8 files changed, 221 insertions(+), 1 deletions(-)
---
diff --git a/plugins/context/Makefile.am b/plugins/context/Makefile.am
index 0451865..425fe71 100644
--- a/plugins/context/Makefile.am
+++ b/plugins/context/Makefile.am
@@ -14,13 +14,17 @@ tmpl_DATA = \
 	tmpl/album-tmpl.html		\
 	tmpl/artist-tmpl.html		\
 	tmpl/loading.html		\
+	tmpl/links-tmpl.html		\
 	tmpl/lyrics-tmpl.html		\
 	tmpl/main.css
 
 imgdir = $(plugindir)/img
 img_DATA = \
 	img/lastfm.png			\
-	img/spinner.gif
+	img/spinner.gif			\
+	img/links/Allmusic16x16.png	\
+	img/links/Discogs16x16.png	\
+	img/links/Wikipedia16x16.png
 
 EXTRA_DIST = $(plugin_in_files) $(tmpl_DATA) $(img_DATA)
 
diff --git a/plugins/context/context/ContextView.py b/plugins/context/context/ContextView.py
index 160d385..46e951b 100644
--- a/plugins/context/context/ContextView.py
+++ b/plugins/context/context/ContextView.py
@@ -33,6 +33,7 @@ import os
 import ArtistTab as at
 import AlbumTab as abt
 import LyricsTab as lt
+import LinksTab as lit
 
 context_ui = """
 <ui>
@@ -161,6 +162,9 @@ class ContextView (gobject.GObject):
         self.ds['lyrics']   = lt.LyricsDataSource (self.db)
         self.view['lyrics'] = lt.LyricsView (self.shell, self.plugin, self.webview, self.ds['lyrics'])
         self.tab['lyrics']  = lt.LyricsTab (self.shell, self.buttons, self.ds['lyrics'], self.view['lyrics'])
+        self.ds['links']   = lit.LinksDataSource (self.db)
+        self.view['links'] = lit.LinksView (self.shell, self.plugin, self.webview)
+        self.tab['links']  = lit.LinksTab (self.shell, self.buttons, self.ds['links'], self.view['links'])
 
     def load_top_five (self, ds):
         top_tracks = ds.get_top_tracks ()
diff --git a/plugins/context/context/LinksTab.py b/plugins/context/context/LinksTab.py
new file mode 100644
index 0000000..d801ee7
--- /dev/null
+++ b/plugins/context/context/LinksTab.py
@@ -0,0 +1,181 @@
+# -*- Mode: python; coding: utf-8; tab-width: 8; indent-tabs-mode: t; -*-
+#
+# Copyright (C) 2010 Kenny Meyer <knny myer gmail com>
+#
+# 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 2, or (at your option)
+# any later version.
+#
+# The Rhythmbox authors hereby grant permission for non-GPL compatible
+# GStreamer plugins to be used and distributed together with GStreamer
+# and Rhythmbox. This permission is above and beyond the permissions granted
+# by the GPL license by which Rhythmbox is covered. If you modify this code
+# you may extend this exception to your version of the code, but you are not
+# obligated to do so. If you do not wish to do so, delete this exception
+# statement from your 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, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA.
+
+import rhythmdb
+import gtk, gobject
+import os
+import cgi
+import urllib
+
+from gettext import gettext as _
+
+import webkit
+from mako.template import Template
+
+
+class LinksTab (gobject.GObject):
+
+    __gsignals__ = {
+        'switch-tab' : (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE,
+                                (gobject.TYPE_STRING,))
+    }
+
+    def __init__ (self, shell, buttons, ds, view):
+        gobject.GObject.__init__ (self)
+        self.shell      = shell
+        self.sp         = shell.get_player ()
+        self.db         = shell.get_property ('db')
+        self.buttons    = buttons
+
+        self.button     = gtk.ToggleButton (_("Links"))
+        self.datasource = ds
+        self.view       = view
+        self.artist     = None
+        self.album      = None
+
+        self.button.show()
+        self.button.set_relief( gtk.RELIEF_NONE )
+        self.button.set_focus_on_click(False)
+        self.button.connect ('clicked',
+            lambda button : self.emit('switch-tab', 'links'))
+        buttons.pack_start (self.button, True, True)
+
+    def activate (self):
+        print "activating Links Tab"
+        self.button.set_active(True)
+        self.reload ()
+
+    def deactivate (self):
+        print "deactivating Links Tab"
+        self.button.set_active(False)
+
+    def reload (self):
+        entry = self.sp.get_playing_entry ()
+        if entry is None:
+            return None
+
+        artist = self.db.entry_get (entry, rhythmdb.PROP_ARTIST)
+        album = self.db.entry_get (entry, rhythmdb.PROP_ALBUM)
+        self.artist = artist
+        self.album = album
+
+        self.datasource.set_artist (artist)
+        self.datasource.set_album (album)
+
+        self.view.load_links (self.datasource)
+
+
+class LinksView (gobject.GObject):
+
+    def __init__ (self, shell, plugin, webview):
+        gobject.GObject.__init__ (self)
+        self.shell    = shell
+        self.plugin   = plugin
+        self.webview  = webview
+        self.file     = ""
+        plugindir = os.path.split(plugin.find_file ('context.rb-plugin'))[0]
+        self.basepath = "file://" + urllib.pathname2url (plugindir)
+
+    def load_links (self, ds):
+        print "Loading links into webview"
+        self.path = self.plugin.find_file('tmpl/links-tmpl.html')
+        self.images = self.basepath + '/img/links/'
+        self.styles = self.basepath + '/tmpl/main.css'
+        self.template = Template (filename = self.path, 
+                                  module_directory = '/tmp/context/')
+
+        self.file = self.template.render (error      = ds.get_error (),
+                                          artist     = ds.get_artist(),
+                                          album      = ds.get_album (),
+                                          art_links  = ds.get_artist_links (),
+                                          alb_links  = ds.get_album_links (),
+                                          images     = self.images,
+                                          stylesheet = self.styles )
+
+        self.webview.load_string (self.file, 'text/html', 'utf-8', self.basepath)
+
+
+class LinksDataSource (gobject.GObject):
+
+    def __init__ (self, db):
+        gobject.GObject.__init__ (self)
+
+        self.db = db
+        self.entry = None
+        self.error = None
+
+        self.artist = None
+        self.album = None
+
+    def set_artist (self, artist):
+        self.artist = artist
+
+    def get_artist (self):
+        return self.artist
+
+    def set_album (self, album):
+        self.album = album
+
+    def get_album (self):
+        return self.album
+
+    def get_artist_links (self):
+        """
+        Return a dictionary with artist URLs to popular music databases and
+        encyclopedias.
+        """
+        artist = self.get_artist()
+        if artist is not "" and artist is not None:
+            wpartist = artist.replace(" ", "_")
+            artist = urllib.quote_plus (artist)
+            artist_links = {
+                "Wikipedia" : "http://www.wikipedia.org/wiki/%s"; % wpartist,
+                "Discogs"  : "http://www.discogs.com/artist/%s"; % artist,
+                "Allmusic" : "http://www.allmusic.com/search/artist/%s"; % artist
+            }
+            return artist_links
+        return None
+
+    def get_album_links (self):
+        """
+        Return a dictionary with album URLs to popular music databases and
+        encyclopedias.
+        """
+        album = self.get_album()
+        if album is not "" and album is not None:
+            wpalbum = album.replace(" ", "_")
+            album = urllib.quote_plus (album)
+            album_links = {
+                "Wikipedia" : "http://www.wikipedia.org/wiki/%s"; % wpalbum,
+                "Discogs" : "http://www.discogs.com/search?type=album&q=%s&f=html"; % album,
+                "Allmusic" : "http://allmusic.com/search/album/%s"; % album
+            }
+            return album_links
+        return None
+
+    def get_error (self):
+        if self.get_artist() is "":
+            return _("No artist specified.")
diff --git a/plugins/context/context/Makefile.am b/plugins/context/context/Makefile.am
index 8ae1ebe..c63b735 100644
--- a/plugins/context/context/Makefile.am
+++ b/plugins/context/context/Makefile.am
@@ -6,6 +6,7 @@ plugin_PYTHON = 			\
 	ArtistTab.py			\
 	ContextView.py			\
 	LastFM.py			\
+	LinksTab.py			\
 	LyricsTab.py			\
 	__init__.py
 
diff --git a/plugins/context/img/links/Allmusic16x16.png b/plugins/context/img/links/Allmusic16x16.png
new file mode 100644
index 0000000..471e751
Binary files /dev/null and b/plugins/context/img/links/Allmusic16x16.png differ
diff --git a/plugins/context/img/links/Discogs16x16.png b/plugins/context/img/links/Discogs16x16.png
new file mode 100644
index 0000000..e96ce28
Binary files /dev/null and b/plugins/context/img/links/Discogs16x16.png differ
diff --git a/plugins/context/img/links/Wikipedia16x16.png b/plugins/context/img/links/Wikipedia16x16.png
new file mode 100644
index 0000000..87205ed
Binary files /dev/null and b/plugins/context/img/links/Wikipedia16x16.png differ
diff --git a/plugins/context/tmpl/links-tmpl.html b/plugins/context/tmpl/links-tmpl.html
new file mode 100644
index 0000000..a9239c5
--- /dev/null
+++ b/plugins/context/tmpl/links-tmpl.html
@@ -0,0 +1,30 @@
+<%page args="error, artist, album, art_links, alb_links, images, stylesheet" />
+<html>
+<head>
+  <meta http-equiv="content-type" content="text-html; charset=utf-8">
+  <link rel="stylesheet" href="${stylesheet}" type="text/css" />
+  <style type="text/css">
+    img { padding: 0 5px 0 5px }
+    ul { list-style-type: none }
+  </style>
+</head>
+<body>
+%if error is None:
+<h1>${ _("Links for %s:") % ("<em>" + artist + "</em>")}</h1>
+<ul>
+%for k, v in art_links.items() :
+    <li><img src="${images}${k}16x16.png" /><a href="${v}">${k}</a></li>
+%endfor
+</ul>
+<h1>${ _("Links for %s:") % ("<em>" + album + "</em>")}</h1>
+<ul>
+%for k, v in alb_links.items() :
+    <li><img src="${images}${k}16x16.png" /><a href="${v}">${k}</a></li>
+%endfor
+</ul>
+%else:
+<h1>${ _("Unable to get links") }</h1>
+<p class="error">${error | h}</p>
+%endif
+</body>
+</html>
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