[evolution] Bug #617557 - Quits without asking user to save unfinished messages

[Milan Crha <mcrha src gnome org>]

commit dfb3b918b0dfe988cdf1e45dc129cb02fea59107
Author: Milan Crha <mcrha redhat com>
Date:   Tue Jun 15 15:10:05 2010 +0200

    Bug #617557 - Quits without asking user to save unfinished messages
    
    The second attempt.

 composer/e-composer-actions.c |   45 +----------------
 composer/e-msg-composer.c     |  113 +++++++++++++++++++++++++++++++++++++++--
 composer/e-msg-composer.h     |    3 +
 3 files changed, 114 insertions(+), 47 deletions(-)
---
diff --git a/composer/e-composer-actions.c b/composer/e-composer-actions.c
index e5c9372..d028beb 100644
--- a/composer/e-composer-actions.c
+++ b/composer/e-composer-actions.c
@@ -56,49 +56,8 @@ static void
 action_close_cb (GtkAction *action,
                  EMsgComposer *composer)
 {
-	GtkhtmlEditor *editor;
-	EComposerHeaderTable *table;
-	GdkWindow *window;
-	GtkWidget *widget;
-	const gchar *subject;
-	gint response;
-
-	editor = GTKHTML_EDITOR (composer);
-	widget = GTK_WIDGET (composer);
-
-	if (!gtkhtml_editor_get_changed (editor)) {
-		gtk_widget_destroy (widget);
-		return;
-	}
-
-	window = gtk_widget_get_window (widget);
-	gdk_window_raise (window);
-
-	table = e_msg_composer_get_header_table (composer);
-	subject = e_composer_header_table_get_subject (table);
-
-	if (subject == NULL || *subject == '\0')
-		subject = _("Untitled Message");
-
-	response = e_alert_run_dialog_for_args (
-		GTK_WINDOW (composer),
-		"mail-composer:exit-unsaved",
-		subject, NULL);
-
-	switch (response) {
-		case GTK_RESPONSE_YES:
-			gtk_widget_hide (widget);
-			e_msg_composer_request_close (composer);
-			gtk_action_activate (ACTION (SAVE_DRAFT));
-			break;
-
-		case GTK_RESPONSE_NO:
-			gtk_widget_destroy (widget);
-			break;
-
-		case GTK_RESPONSE_CANCEL:
-			break;
-	}
+	if (e_msg_composer_can_close (composer, TRUE))
+		gtk_widget_destroy (GTK_WIDGET (composer));
 }
 
 static void
diff --git a/composer/e-msg-composer.c b/composer/e-msg-composer.c
index ba09088..d2e60cc 100644
--- a/composer/e-msg-composer.c
+++ b/composer/e-msg-composer.c
@@ -1689,12 +1689,50 @@ msg_composer_finalize (GObject *object)
 static gboolean
 msg_composer_delete_event_cb (GtkWidget *widget, gpointer user_data)
 {
-	/* This is needed for the ACTION macro. */
-	EMsgComposer *composer = E_MSG_COMPOSER (widget);
+	EShell *shell;
 
-	gtk_action_activate (ACTION (CLOSE));
+	shell = e_shell_get_default ();
 
-	return FALSE;
+	if (g_list_length (e_shell_get_watched_windows (shell)) == 1) {
+		/* This is the last watched window, use the quit
+		   mechanism to have a draft saved properly */
+		e_shell_quit (shell, E_SHELL_QUIT_ACTION);
+	} else {
+		/* This is needed for the ACTION macro. */
+		EMsgComposer *composer = E_MSG_COMPOSER (widget);
+
+		/* There are more watched windows opened,
+		   invoke only a close action */
+		gtk_action_activate (ACTION (CLOSE));
+	}
+
+	return TRUE;
+}
+
+static void
+msg_composer_prepare_for_quit_cb (EShell *shell, EActivity *activity, EMsgComposer *composer)
+{
+	if (e_msg_composer_is_exiting (composer)) {
+		/* needs save draft first */
+		g_object_ref (activity);
+		g_object_weak_ref (G_OBJECT (composer), (GWeakNotify) g_object_unref, activity);
+		gtk_action_activate (ACTION (SAVE_DRAFT));
+	}
+}
+
+static void
+msg_composer_quit_requested_cb (EShell *shell, EShellQuitReason reason, EMsgComposer *composer)
+{
+	if (e_msg_composer_is_exiting (composer)) {
+		EShell *shell;
+
+		shell = e_shell_get_default ();
+
+		g_signal_handlers_disconnect_by_func (shell, msg_composer_quit_requested_cb, composer);
+		g_signal_handlers_disconnect_by_func (shell, msg_composer_prepare_for_quit_cb, composer);
+	} else if (!e_msg_composer_can_close (composer, FALSE) && !e_msg_composer_is_exiting (composer)) {
+		e_shell_cancel_quit (shell);
+	}
 }
 
 static void
@@ -1741,6 +1779,12 @@ msg_composer_constructed (GObject *object)
 	e_shell_adapt_window_size (shell, GTK_WINDOW (composer));
 	e_shell_watch_window (shell, GTK_WINDOW (object));
 
+	g_signal_connect (shell, "quit-requested",
+		G_CALLBACK (msg_composer_quit_requested_cb), composer);
+
+	g_signal_connect (shell, "prepare-for-quit",
+		G_CALLBACK (msg_composer_prepare_for_quit_cb), composer);
+
 	/* Restore Persistent State */
 
 	array = composer->priv->gconf_bridge_binding_ids;
@@ -1847,12 +1891,18 @@ static void
 msg_composer_destroy (GtkObject *object)
 {
 	EMsgComposer *composer = E_MSG_COMPOSER (object);
+	EShell *shell;
 
 	if (composer->priv->address_dialog != NULL) {
 		gtk_widget_destroy (composer->priv->address_dialog);
 		composer->priv->address_dialog = NULL;
 	}
 
+	shell = e_shell_get_default ();
+
+	g_signal_handlers_disconnect_by_func (shell, msg_composer_quit_requested_cb, composer);
+	g_signal_handlers_disconnect_by_func (shell, msg_composer_prepare_for_quit_cb, composer);
+
 	/* Chain up to parent's destroy() method. */
 	GTK_OBJECT_CLASS (parent_class)->destroy (object);
 }
@@ -4009,6 +4059,61 @@ e_msg_composer_request_close (EMsgComposer *composer)
 	composer->priv->application_exiting = TRUE;
 }
 
+/* Returns whether can close the composer immediately. It will return FALSE also when
+   saving to drafts, but the e_msg_composer_is_exiting will return TRUE for this case.
+   can_save_draft means whether can save draft immediately, or rather keep it on the
+   caller (when FALSE). If kept on the folder, then returns FALSE and sets interval
+   variable to return TRUE in e_msg_composer_is_exiting. */
+gboolean
+e_msg_composer_can_close (EMsgComposer *composer, gboolean can_save_draft)
+{
+	gboolean res = FALSE;
+	GtkhtmlEditor *editor;
+	EComposerHeaderTable *table;
+	GdkWindow *window;
+	GtkWidget *widget;
+	const gchar *subject;
+	gint response;
+
+	editor = GTKHTML_EDITOR (composer);
+	widget = GTK_WIDGET (composer);
+
+	if (!gtkhtml_editor_get_changed (editor))
+		return TRUE;
+
+	window = gtk_widget_get_window (widget);
+	gdk_window_raise (window);
+
+	table = e_msg_composer_get_header_table (composer);
+	subject = e_composer_header_table_get_subject (table);
+
+	if (subject == NULL || *subject == '\0')
+		subject = _("Untitled Message");
+
+	response = e_alert_run_dialog_for_args (
+		GTK_WINDOW (composer),
+		"mail-composer:exit-unsaved",
+		subject, NULL);
+
+	switch (response) {
+		case GTK_RESPONSE_YES:
+			gtk_widget_hide (widget);
+			e_msg_composer_request_close (composer);
+			if (can_save_draft)
+				gtk_action_activate (ACTION (SAVE_DRAFT));
+			break;
+
+		case GTK_RESPONSE_NO:
+			res = TRUE;
+			break;
+
+		case GTK_RESPONSE_CANCEL:
+			break;
+	}
+
+	return res;
+}
+
 EMsgComposer *
 e_msg_composer_load_from_file (const gchar *filename)
 {
diff --git a/composer/e-msg-composer.h b/composer/e-msg-composer.h
index 25c78ce..b10253d 100644
--- a/composer/e-msg-composer.h
+++ b/composer/e-msg-composer.h
@@ -134,6 +134,9 @@ void		e_msg_composer_add_message_attachments
 						 gboolean just_inlines);
 
 void		e_msg_composer_request_close	(EMsgComposer *composer);
+gboolean	e_msg_composer_can_close	(EMsgComposer *composer,
+						 gboolean can_save_draft);
+
 EMsgComposer *	e_msg_composer_load_from_file	(const gchar *filename);
 void		e_msg_composer_check_autosave	(GtkWindow *parent);