Throw out DBus, add X11 based lock activation

DBus.py

@@ -1,90 +0,0 @@
-# Copyright (c) 2012, Matthias Schiffer <mschiffer@universe-factory.net>
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are met:
-#
-#   1. Redistributions of source code must retain the above copyright notice,
-#      this list of conditions and the following disclaimer.
-#   2. Redistributions in binary form must reproduce the above copyright notice,
-#      this list of conditions and the following disclaimer in the documentation
-#      and/or other materials provided with the distribution.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
-# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-from gi.repository import GLib, Gio
-
-from ctypes import CDLL, POINTER, Structure, CFUNCTYPE, pointer
-from ctypes import c_void_p, c_char_p, c_bool
-from ctypes.util import find_library
-
-from functools import partial
-
-
-dbus_xml = '''
-<node>
-  <interface name="net.universe_factory.Pylock">
-    <method name="Lock"/>
-  </interface>
-</node>
-'''
-
-gio = CDLL(find_library('gio-2.0'))
-
-nodeInfo = Gio.DBusNodeInfo.new_for_xml(dbus_xml)
-interfaceInfo = nodeInfo.lookup_interface('net.universe_factory.Pylock')
-
-METHOD_CALL_FUNC = CFUNCTYPE(None, c_void_p, c_char_p, c_char_p, c_char_p, c_char_p, c_void_p, c_void_p, c_void_p)
-GET_PROPERTY_FUNC = CFUNCTYPE(c_void_p, c_void_p, c_char_p, c_char_p, c_char_p, c_char_p, c_void_p, c_void_p)
-SET_PROPERTY_FUNC = CFUNCTYPE(c_bool, c_void_p, c_char_p, c_char_p, c_char_p, c_char_p, c_void_p, c_void_p, c_void_p)
-
-def method_call(locker, connection, sender, object_path, interface_name, method_name, parameters, invocation, user_data):
-    assert str(method_name, 'ascii') == 'Lock'
-
-    locker.lock()
-    gio.g_dbus_method_invocation_return_value(invocation, hash(GLib.Variant.new_tuple()))
-
-@GET_PROPERTY_FUNC
-def get_property(connection, sender, object_path, interface_name, property_name, error, user_data):
-    assert False
-
-@SET_PROPERTY_FUNC
-def set_property(connection, sender, object_path, interface_name, property_name, value, error, user_data):
-    assert False
-
-class VTable(Structure):
-    _fields_ = [
-        ("method_call", METHOD_CALL_FUNC),
-        ("get_property", GET_PROPERTY_FUNC),
-        ("set_property", SET_PROPERTY_FUNC)
-        ]
-
-    def __init__(self, locker):
-        Structure.__init__(self)
-        self.method_call = METHOD_CALL_FUNC(partial(method_call, locker))
-        self.get_property = get_property
-        self.set_property = set_property
-
-gio.g_dbus_connection_register_object.argtypes = [c_void_p, c_char_p, c_void_p, POINTER(VTable), c_void_p, c_void_p, c_void_p]
-gio.g_dbus_method_invocation_return_value.argtypes = [c_void_p, c_void_p]
-
-
-class DBus(object):
-    def __init__(self, locker):
-        self.vtable = VTable(locker)
-
-        Gio.bus_own_name(Gio.BusType.SESSION, 'net.universe_factory.Pylock', Gio.BusNameOwnerFlags.NONE, self.bus_aquired, None, None)
-
-    def bus_aquired(self, connection, name):
-        b = lambda s: bytes(s, 'ascii')
-        gio.g_dbus_connection_register_object(c_void_p(hash(connection)), b('/net/universe_factory/Pylock'), c_void_p(hash(interfaceInfo)), pointer(self.vtable), None, None, None)

LockWindow.py

@@ -40,14 +40,19 @@ class LockWindow(Gtk.Window):
     def __init__(self):
         Gtk.Window.__init__(self)
 
-        bg = Gtk.Image.new_from_file("bg.svg")
+        self.display = Gdk.Display.get_default()
-        self.add(bg)
+        self.screen = self.display.get_default_screen()
 
-        self.set_decorated(False)
+        self.overlay = Gtk.Overlay()
-        self.set_skip_taskbar_hint(True)
+        self.add(self.overlay)
-        self.set_skip_pager_hint(True)
+
-        self.set_keep_above(True)
+        self.bg = Gtk.Image.new_from_file("bg.svg")
-        self.fullscreen()
+        self.overlay.add(self.bg)
+
+        self.realize()
+        self.get_window().set_override_redirect(True)
+
+        self.set_has_resize_grip(False)
 
         builder = Gtk.Builder()
 
@@ -61,12 +66,9 @@ class LockWindow(Gtk.Window):
         self.logoutButton = builder.get_object('logout_button')
         self.unlockButton = builder.get_object('unlock_button')
 
-        self.unlockWindow.set_position(Gtk.WindowPosition.CENTER_ALWAYS)
+        self.overlay.add_overlay(self.unlockWindow)
-        self.unlockWindow.set_transient_for(self)
-        self.unlockWindow.set_modal(True)
 
         self.connect('delete-event', lambda w, e: True)
-        self.unlockWindow.connect('delete-event', lambda w, e: True)
 
         self.promptEntry.connect('activate', lambda w: self._tryUnlock())
         self.logoutButton.connect('clicked', lambda w: self._logout())
@@ -74,10 +76,9 @@ class LockWindow(Gtk.Window):
 
         self.reset(True)
 
-        self.display = Gdk.Display.get_default()
         self.deviceManager = self.display.get_device_manager()
 
-        self.unlockWindow.connect('map-event', self._grab_devices)
+        self.connect('map-event', self._grabDevices)
 
     def _logout(self):
         self.promptEntry.set_sensitive(False)
@@ -128,26 +129,34 @@ class LockWindow(Gtk.Window):
     def setAuthMessage(self, message):
         self.messageLabel.set_label(message)
 
-    def _grab_devices(self, w, e):
+    def _grabDevices(self, w, e):
+        self.get_window().move_resize(0, 0, self.screen.get_width(), self.screen.get_height())
+
+        self.promptEntry.grab_focus()
+
         for device in self.deviceManager.list_devices(Gdk.DeviceType.MASTER):
-            device.grab(self.unlockWindow.get_window(), Gdk.GrabOwnership.APPLICATION, True, Gdk.EventMask.ALL_EVENTS_MASK, None, Gdk.CURRENT_TIME)
+            device.grab(self.get_window(), Gdk.GrabOwnership.APPLICATION, True, Gdk.EventMask.ALL_EVENTS_MASK, None, Gdk.CURRENT_TIME)
+
+        self.present()
 
         return False
 
-    def _ungrab_devices(self):
+    def _ungrabDevices(self):
         for device in self.deviceManager.list_devices(Gdk.DeviceType.MASTER):
             device.ungrab(Gdk.CURRENT_TIME)
 
     def lock(self):
-        self.show_all()
+        #geom = Gdk.Geometry()
-        self.unlockWindow.show_all()
+        #geom.min_width = self.screen.get_width()
+        #geom.max_width = self.screen.get_width()
+        #geom.min_height = self.screen.get_height()
+        #geom.max_height = self.screen.get_height()
+        #self.set_geometry_hints(self.overlay, geom, Gdk.WindowHints.MAX_SIZE)
 
-        self.promptEntry.grab_focus()
+        self.show_all()
 
     def unlock(self):
-        self._ungrab_devices()
+        self._ungrabDevices()
 
-        self.unlockWindow.hide()
         self.hide()
-
         self.reset(True)

Locker.py

@@ -62,8 +62,8 @@ class Locker(object):
 
     def lock(self):
         if not self.locked:
-            self.doLock(self.logoutTimeout)
             self.locked = True
+            self.doLock(self.logoutTimeout)
 
             if self.doLogout is not None:
                 self.currentLogoutTimeout = self.logoutTimeout

Message.py

@@ -0,0 +1,78 @@
+# Copyright (c) 2012, Matthias Schiffer <mschiffer@universe-factory.net>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+#   1. Redistributions of source code must retain the above copyright notice,
+#      this list of conditions and the following disclaimer.
+#   2. Redistributions in binary form must reproduce the above copyright notice,
+#      this list of conditions and the following disclaimer in the documentation
+#      and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import ctypes
+import ctypes.util
+
+from gi.repository import Gdk, GdkX11
+
+
+XEvent_p = ctypes.c_void_p
+display_p = ctypes.c_void_p
+xid = ctypes.c_ulong
+x11_bool = ctypes.c_int
+x11_time = ctypes.c_ulong
+status = ctypes.c_int
+
+
+libX11 = ctypes.util.find_library('X11')
+if libX11 == None:
+    raise OSError('libX11 could not be found.')
+libX11 = ctypes.cdll.LoadLibrary(libX11)
+
+libX11.XSendEvent.argtypes = display_p, xid, x11_bool, ctypes.c_long, XEvent_p
+libX11.XSendEvent.restype = status
+libX11.XSetSelectionOwner.argtypes = display_p, xid, xid, x11_time
+libX11.XSetSelectionOwner.restype = ctypes.c_int
+libX11.XGetSelectionOwner.argtypes = display_p, xid
+libX11.XGetSelectionOwner.restype = xid
+
+
+display = Gdk.Display.get_default()
+dpy_p = display_p(hash(GdkX11.X11Display.get_xdisplay(display)))
+atomPylockWindow = GdkX11.x11_get_xatom_by_name("PYLOCK_WINDOW")
+atomPylockActionLock = GdkX11.x11_get_xatom_by_name("PYLOCK_ACTION_LOCK")
+
+
+def getSelection():
+    return libX11.XGetSelectionOwner(dpy_p, atomPylockWindow)
+
+def sendLockMessage():
+    window = getSelection()
+    if window == 0:
+        return
+
+    gdkWindow = GdkX11.X11Window.foreign_new_for_display(display, window)
+    gdkWindow.show()
+    display.sync()
+
+def acquireSelection(window):
+    if getSelection() != 0:
+        return False
+
+    window.realize()
+    xid = GdkX11.X11Window.get_xid(window.get_window())
+    libX11.XSetSelectionOwner(dpy_p, atomPylockWindow, xid, 0)
+
+    return (getSelection() == xid)

pylock.py

@@ -34,9 +34,9 @@ import argparse
 
 from gi.repository import Gtk, Gdk, Gio
 
-from DBus import DBus
 from Locker import Locker
 from LockWindow import LockWindow
+import Message
 import pam
 
 
@@ -74,8 +74,20 @@ locale.textdomain('pylock')
 Gtk.Settings.get_default().set_property('gtk-theme-name', theme)
 
 
+if Message.getSelection() != 0:
+    if args.timeout == 0:
+        Message.sendLockMessage()
+        exit(0)
+    else:
+        print('There seems to be a Pylock instance already running.', file=sys.stderr)
+        exit(1)
+
+
 window = LockWindow()
 
+if not Message.acquireSelection(window):
+    print('Unable to register for lock messages', file=sys.stderr)
+
 
 def lock(timeLeft):
     window.updateLockMessage(args.username, timeLeft)
@@ -98,8 +110,10 @@ else:
     locker = Locker(args.timeout, lock, window.unlock, args.logout, logout, updateTimeout)
 
 
-if args.timeout != 0:
+def _triggerLock(w, e):
-    dbus = DBus(locker)
+    locker.lock()
+
+window.connect('map-event', _triggerLock)
 
 
 pamAuth = pam.pam()

unlock.ui

@@ -1,17 +1,12 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
   <requires lib="gtk+" version="2.24"/>
-  <object class="GtkWindow" id="unlock_window">
+  <object class="GtkNotebook" id="unlock_window">
-    <property name="can_focus">False</property>
-    <property name="resizable">False</property>
-    <property name="decorated">False</property>
-    <property name="has_resize_grip">False</property>
-    <signal name="size-allocate" handler="login_window_size_allocate_cb" swapped="no"/>
-    <child>
-      <object class="GtkNotebook" id="login_notebook">
     <property name="width_request">700</property>
     <property name="visible">True</property>
-        <property name="can_focus">True</property>
+    <property name="can_focus">False</property>
+    <property name="halign">center</property>
+    <property name="valign">center</property>
     <property name="show_tabs">False</property>
     <child>
       <object class="GtkHBox" id="box1">
@@ -74,6 +69,7 @@
                         <property name="can_focus">True</property>
                         <property name="visibility">False</property>
                         <property name="invisible_char">•</property>
+                        <property name="invisible_char_set">True</property>
                         <property name="primary_icon_activatable">False</property>
                         <property name="secondary_icon_activatable">False</property>
                         <signal name="activate" handler="login_cb" swapped="no"/>
@@ -167,6 +163,4 @@
       <placeholder/>
     </child>
   </object>
-    </child>
-  </object>
 </interface>