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10 files changed, 271 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
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+++ b/.gitignore
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+*.pyc
diff --git a/README b/README
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+This is "projector", a hacky way to supply
+input to a projector connected to a shared
+system.
+
+Using this collection of scripts, you can:
+  - display Web Pages
+  - play back video
+  - display your screen via vnc
+
+Usage:
+======
+
+This script assumes /usr/bin/python2 points to a python
+interpreter adhering to python language version >= 2.6
+If this is not true, you will either have to create a
+fitting symlink or change the scripts.
+
+The files in the 'remote' directory should be placed
+somewhere on the box attached to the projector. Xsession
+is an example how an Xsession file to start the projector
+might look. On the remote box, also TightVNC Viewer,
+python-cairo, python-webkit, Mplayer are required.
+
+The scripts in the top directory enable the user to control
+the projector. They should be pretty much self explanatory,
+the beamer URL is by default http://<beamer-ip>:8082/ 
+vnc_projector requires x11vnc.
diff --git a/remote/Xsession b/remote/Xsession
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+++ b/remote/Xsession
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+#!/bin/sh
+
+metacity &
+python projector.py
diff --git a/remote/__init__.py b/remote/__init__.py
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index 0000000..e69de29
--- /dev/null
+++ b/remote/__init__.py
diff --git a/remote/brause.py b/remote/brause.py
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+++ b/remote/brause.py
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+#!/usr/bin/python2
+
+# written by equinox in 5 mintes on 09-04-2010 :)
+
+import sys
+
+import gobject
+import pango
+import pygtk
+pygtk.require('2.0')
+import gtk
+from gtk import gdk
+import cairo
+
+import webkit
+
+class BrauseWindow(gtk.Window):
+	def _destroy(s, widget, event):
+		gtk.main_quit()
+
+	def __init__(s):
+		gtk.Window.__init__(s, type = gtk.WINDOW_TOPLEVEL)
+		s.connect('delete-event', s._destroy)
+		s.set_decorated(False)
+		s.fullscreen()
+
+		s.webkit = webkit.WebView()
+		s.add(s.webkit)
+		s.show_all()
+
+		s.webkit.open(sys.argv[1])
+
+	def run(s):
+		gtk.main()
+
+BrauseWindow().run()
+
diff --git a/remote/projector.py b/remote/projector.py
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+++ b/remote/projector.py
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+#!/usr/bin/python2
+
+import subprocess
+import os
+import time
+import sys
+import signal
+import select
+import errno
+import inspect
+
+from SimpleXMLRPCServer import SimpleXMLRPCServer
+
+projection_process = None
+default_task = [
+        './brause.py',
+        'http://sublab.rotefraktion.org/loungescreen/'
+]
+projection_task = default_task
+
+class ChildProcess(subprocess.Popen):
+    def __init__(self, *args, **kwargs):
+        subprocess.Popen.__init__(self, *args, **kwargs)
+        self._kill = os.kill
+    def __del__(self):
+        try:
+            self._kill(self.pid, 9)
+            self.poll()
+        except EnvironmentError as e:
+            if e.args[0] != errno.ESRCH:
+                raise
+
+def restart_projection(dummy=None):
+    global projection_process
+    global projection_task
+
+    print "Replacing projection_process..."
+    projection_process = ChildProcess(projection_task)
+
+def sigchld(signum, trace):
+    global projection_process
+
+    print "Got SIGCHLD"
+    if projection_process is not None and \
+            projection_process.poll() is None:
+        # This info was not about the current projection_process...
+        return
+
+    # Current projection_process exited, fallback to default
+    reset_projection()
+
+def display_url(url):
+    global projection_task
+
+    projection_task = [
+        './brause.py',
+        url
+    ]
+    restart_projection()
+
+    return 0 # For RPC
+
+def display_video(url):
+    global projection_task
+
+    if not (url.startswith('http://') or \
+            url.startswith('ftp://')):
+        raise ValueError('URL should point to a http/ftp resource...')
+
+    projection_task = [
+        'mplayer',
+        '-fs',
+        url
+    ]
+    restart_projection()
+
+    return 0 # For RPC
+
+def reset_projection():
+    global projection_task
+    global default_task
+
+    projection_task = default_task
+    restart_projection()
+
+    return 0 # For RPC
+
+def start_vnc(port):
+    global projection_task
+
+    if type(port) is not int:
+        raise TypeError("start_vnc expects (port:int) as arguments")
+
+    # Worst Monkey Patch ever (tm)
+    host = inspect.stack()[3][0].f_locals['self'].client_address[0]
+    print 'Connecting vncviewer to %s:%d' % (host,port)
+
+    projection_task = [
+            "vncviewer", "-fullscreen",
+            "-viewonly", "%s::%d" % (host,port) ]
+    restart_projection()
+
+    return 0
+
+def main():
+    global projecting
+    subprocess.check_call("xset s off".split())
+    subprocess.check_call("xset -dpms".split())
+
+    signal.signal(signal.SIGCHLD, sigchld)
+    restart_projection()
+
+    server = SimpleXMLRPCServer(("0.0.0.0", 8082))
+    server.register_function(display_url)
+    server.register_function(display_video)
+    server.register_function(reset_projection)
+    server.register_function(start_vnc)
+
+    while True:
+        try:
+            server.serve_forever()
+        except select.error as e:
+            if e.args[0] == errno.EINTR:
+                continue
+            raise
+
+if __name__ == '__main__':
+    main()
diff --git a/reset_projector.py b/reset_projector.py
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+++ b/reset_projector.py
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+#!/usr/bin/python2
+
+import sys
+import xmlrpclib
+
+def main():
+    if len(sys.argv) != 2:
+        sys.stderr.write('Usage: %s <projector-url>\n' % sys.argv[0])
+        sys.exit(1)
+
+    projector = xmlrpclib.ServerProxy(sys.argv[1])
+    projector.reset_projection()
+
+if __name__ == '__main__':
+    main()
diff --git a/video_projector.py b/video_projector.py
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+++ b/video_projector.py
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+#!/usr/bin/python2
+
+import sys
+import xmlrpclib
+
+def main():
+    if len(sys.argv) != 3:
+        sys.stderr.write('Usage: %s <projector-url> <url>\n' % sys.argv[0])
+        sys.exit(1)
+
+    projector = xmlrpclib.ServerProxy(sys.argv[1])
+    projector.display_video(sys.argv[2])
+
+if __name__ == '__main__':
+    main()
diff --git a/vnc_projector.py b/vnc_projector.py
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+++ b/vnc_projector.py
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+#!/usr/bin/python2
+
+from remote.projector import ChildProcess
+
+import sys
+import xmlrpclib
+import time
+
+def main():
+    if len(sys.argv) not in [ 2, 3 ]:
+        sys.stderr.write('Usage: %s <projector-url> [port]\n' % sys.argv[0])
+        sys.exit(1)
+
+    if len(sys.argv) == 3:
+        port = int(sys.argv[2])
+    else:
+        port = 5900
+
+    cmdline = "x11vnc -listen 0.0.0.0 -viewonly -nopw -rfbport %d" % port
+    x11vnc = ChildProcess(cmdline.split())
+    time.sleep(2)
+
+    projector = xmlrpclib.ServerProxy(sys.argv[1])
+    projector.start_vnc(port)
+
+    x11vnc.communicate()
+
+if __name__ == '__main__':
+    main()
diff --git a/web_projector.py b/web_projector.py
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+++ b/web_projector.py
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+#!/usr/bin/python2
+
+import sys
+import xmlrpclib
+
+def main():
+    if len(sys.argv) != 3:
+        sys.stderr.write('Usage: %s <projector-url> <url>\n' % sys.argv[0])
+        sys.exit(1)
+
+    projector = xmlrpclib.ServerProxy(sys.argv[1])
+    projector.display_url(sys.argv[2])
+
+if __name__ == '__main__':
+    main()