Convert composer autosave to an EExtension.

Given the way the autosave feature was awkwardly bolted on to the
composer, an EExtension seemed like a natural fit.  And it helped
clean up some object lifecycle hacks (and bugs).

What we have now is a new module consisting of two EExtensions:

   EComposerAutosave extends EMsgComposer and determines when to
   kick off an asynchronous autosave operation.

   EComposerRegistry extends EShell and offers to restore orphaned
   autosave files on startup (which is also asynchronous now).

e-autosave-utils.c holds the actual asynchronous functions and a few
other miscellaneous utility functions.

Source code for the new module lives in /modules/composer-autosave.

1 files changed, 16 insertions, 1 deletions

diff --git a/shell/e-shell.c b/shell/e-shell.c
index fcb3d9abf3..db9efc9331 100644
--- a/shell/e-shell.c
+++ b/shell/e-shell.c
@@ -180,6 +180,16 @@ shell_window_focus_in_event_cb (EShell *shell,
 	return FALSE;
 }
 
+static gboolean
+shell_emit_window_destroyed_cb (EShell *shell)
+{
+	g_signal_emit (shell, signals[WINDOW_DESTROYED], 0);
+
+	g_object_unref (shell);
+
+	return FALSE;
+}
+
 static void
 shell_window_weak_notify_cb (EShell *shell,
                              GObject *where_the_object_was)
@@ -190,7 +200,12 @@ shell_window_weak_notify_cb (EShell *shell,
 	list = g_list_remove (list, where_the_object_was);
 	shell->priv->watched_windows = list;
 
-	g_signal_emit (shell, signals[WINDOW_DESTROYED], 0);
+	/* Let the watched window finish finalizing itself before we
+	 * emit the "window-destroyed" signal, which may trigger the
+	 * application to initiate shutdown. */
+	g_idle_add (
+		(GSourceFunc) shell_emit_window_destroyed_cb,
+		g_object_ref (shell));
 }
 
 static void