inicial

1 files changed, 235 insertions, 0 deletions

diff --git a/cut-n-paste/smclient/eggsmclient-osx.c b/cut-n-paste/smclient/eggsmclient-osx.c
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+/*
+ * Copyright (C) 2007 Novell, Inc.
+ * Copyright (C) 2008 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 
+ * Boston, MA 02110-1301, USA.
+ */
+
+/* EggSMClientOSX
+ *
+ * For details on the OS X logout process, see:
+ * http://developer.apple.com/documentation/MacOSX/Conceptual/BPSystemStartup/Articles/BootProcess.html#//apple_ref/doc/uid/20002130-114618
+ *
+ * EggSMClientOSX registers for the kAEQuitApplication AppleEvent; the
+ * handler we register (quit_requested()) will be invoked from inside
+ * the quartz event-handling code (specifically, from inside
+ * [NSApplication nextEventMatchingMask]) when an AppleEvent arrives.
+ * We use AESuspendTheCurrentEvent() and AEResumeTheCurrentEvent() to
+ * allow asynchronous / non-main-loop-reentering processing of the
+ * quit request. (These are part of the Carbon framework; it doesn't
+ * seem to be possible to handle AppleEvents asynchronously from
+ * Cocoa.)
+ */
+
+#include "config.h"
+
+#include "eggsmclient-private.h"
+#include <gdk/gdkquartz.h>
+#include <Carbon/Carbon.h>
+#include <CoreServices/CoreServices.h>
+
+#define EGG_TYPE_SM_CLIENT_OSX            (egg_sm_client_osx_get_type ())
+#define EGG_SM_CLIENT_OSX(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), EGG_TYPE_SM_CLIENT_OSX, EggSMClientOSX))
+#define EGG_SM_CLIENT_OSX_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EGG_TYPE_SM_CLIENT_OSX, EggSMClientOSXClass))
+#define EGG_IS_SM_CLIENT_OSX(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), EGG_TYPE_SM_CLIENT_OSX))
+#define EGG_IS_SM_CLIENT_OSX_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EGG_TYPE_SM_CLIENT_OSX))
+#define EGG_SM_CLIENT_OSX_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EGG_TYPE_SM_CLIENT_OSX, EggSMClientOSXClass))
+
+typedef struct _EggSMClientOSX        EggSMClientOSX;
+typedef struct _EggSMClientOSXClass   EggSMClientOSXClass;
+
+struct _EggSMClientOSX {
+  EggSMClient parent;
+
+  AppleEvent quit_event, quit_reply;
+  gboolean quit_requested, quitting;
+};
+
+struct _EggSMClientOSXClass
+{
+  EggSMClientClass parent_class;
+
+};
+
+static void     sm_client_osx_startup (EggSMClient *client,
+				       const char  *client_id);
+static void     sm_client_osx_will_quit (EggSMClient *client,
+					 gboolean     will_quit);
+static gboolean sm_client_osx_end_session (EggSMClient         *client,
+					   EggSMClientEndStyle  style,
+					   gboolean  request_confirmation);
+
+static pascal OSErr quit_requested (const AppleEvent *, AppleEvent *, long);
+
+G_DEFINE_TYPE (EggSMClientOSX, egg_sm_client_osx, EGG_TYPE_SM_CLIENT)
+
+static void
+egg_sm_client_osx_init (EggSMClientOSX *osx)
+{
+  ;
+}
+
+static void
+egg_sm_client_osx_class_init (EggSMClientOSXClass *klass)
+{
+  EggSMClientClass *sm_client_class = EGG_SM_CLIENT_CLASS (klass);
+
+  sm_client_class->startup             = sm_client_osx_startup;
+  sm_client_class->will_quit           = sm_client_osx_will_quit;
+  sm_client_class->end_session         = sm_client_osx_end_session;
+}
+
+EggSMClient *
+egg_sm_client_osx_new (void)
+{
+  return g_object_new (EGG_TYPE_SM_CLIENT_OSX, NULL);
+}
+
+static void
+sm_client_osx_startup (EggSMClient *client,
+		       const char  *client_id)
+{
+  AEInstallEventHandler (kCoreEventClass, kAEQuitApplication,
+			 NewAEEventHandlerUPP (quit_requested),
+			 (long)GPOINTER_TO_SIZE (client), false);
+}
+
+static gboolean
+idle_quit_requested (gpointer client)
+{
+  egg_sm_client_quit_requested (client);
+  return FALSE;
+}
+
+static pascal OSErr
+quit_requested (const AppleEvent *aevt, AppleEvent *reply, long refcon)
+{
+  EggSMClient *client = GSIZE_TO_POINTER ((gsize)refcon);
+  EggSMClientOSX *osx = GSIZE_TO_POINTER ((gsize)refcon);
+
+  g_return_val_if_fail (!osx->quit_requested, userCanceledErr);
+    
+  /* FIXME AEInteractWithUser? */
+
+  osx->quit_requested = TRUE;
+  AEDuplicateDesc (aevt, &osx->quit_event);
+  AEDuplicateDesc (reply, &osx->quit_reply);
+  AESuspendTheCurrentEvent (aevt);
+
+  /* Don't emit the "quit_requested" signal immediately, since we're
+   * called from a weird point in the guts of gdkeventloop-quartz.c
+   */
+  g_idle_add (idle_quit_requested, client);
+  return noErr;
+}
+
+static pascal OSErr
+quit_requested_resumed (const AppleEvent *aevt, AppleEvent *reply, long refcon)
+{
+  EggSMClientOSX *osx = GSIZE_TO_POINTER ((gsize)refcon);
+
+  osx->quit_requested = FALSE;
+  return osx->quitting ? noErr : userCanceledErr;
+}
+
+static gboolean
+idle_will_quit (gpointer client)
+{
+  EggSMClientOSX *osx = (EggSMClientOSX *)client;
+
+  /* Resume the event with a new handler that will return a value to
+   * the system.
+   */
+  AEResumeTheCurrentEvent (&osx->quit_event, &osx->quit_reply,
+			   NewAEEventHandlerUPP (quit_requested_resumed),
+			   (long)GPOINTER_TO_SIZE (client));
+  AEDisposeDesc (&osx->quit_event);
+  AEDisposeDesc (&osx->quit_reply);
+
+  if (osx->quitting)
+    egg_sm_client_quit (client);
+  return FALSE;
+}
+
+static void
+sm_client_osx_will_quit (EggSMClient *client,
+			 gboolean     will_quit)
+{
+  EggSMClientOSX *osx = (EggSMClientOSX *)client;
+
+  g_return_if_fail (osx->quit_requested);
+
+  osx->quitting = will_quit;
+
+  /* Finish in an idle handler since the caller might have called
+   * egg_sm_client_will_quit() from inside the "quit_requested" signal
+   * handler, but may not expect the "quit" signal to arrive during
+   * the _will_quit() call.
+   */
+  g_idle_add (idle_will_quit, client);
+}
+
+static gboolean
+sm_client_osx_end_session (EggSMClient         *client,
+			   EggSMClientEndStyle  style,
+			   gboolean             request_confirmation)
+{
+  static const ProcessSerialNumber loginwindow_psn = { 0, kSystemProcess };
+  AppleEvent event = { typeNull, NULL }, reply = { typeNull, NULL };
+  AEAddressDesc target;
+  AEEventID id;
+  OSErr err;
+
+  switch (style)
+    {
+    case EGG_SM_CLIENT_END_SESSION_DEFAULT:
+    case EGG_SM_CLIENT_LOGOUT:
+      id = request_confirmation ? kAELogOut : kAEReallyLogOut;
+      break;
+    case EGG_SM_CLIENT_REBOOT:
+      id = request_confirmation ? kAEShowRestartDialog : kAERestart;
+      break;
+    case EGG_SM_CLIENT_SHUTDOWN:
+      id = request_confirmation ? kAEShowShutdownDialog : kAEShutDown;
+      break;
+    }
+
+  err = AECreateDesc (typeProcessSerialNumber, &loginwindow_psn, 
+		      sizeof (loginwindow_psn), &target);
+  if (err != noErr)
+    {
+      g_warning ("Could not create descriptor for loginwindow: %d", err);
+      return FALSE;
+    }
+
+  err = AECreateAppleEvent (kCoreEventClass, id, &target,
+			    kAutoGenerateReturnID, kAnyTransactionID,
+			    &event);
+  AEDisposeDesc (&target);
+  if (err != noErr)
+    {
+      g_warning ("Could not create logout AppleEvent: %d", err);
+      return FALSE;
+    }
+
+  err = AESend (&event, &reply, kAENoReply, kAENormalPriority,
+		kAEDefaultTimeout, NULL, NULL);
+  AEDisposeDesc (&event);
+  if (err == noErr)
+    AEDisposeDesc (&reply);
+
+  return err == noErr;
+}