[evolution-patches] Bug 127526: Ask user to make Evolution default mail app for GNOME

[Jonathan Dieter <jdieter99 gmx net>]

This patch will ask the user if they would like Evolution to be the 
default mailer for GNOME the first time that Evolution is run.  If the 
user says "yes", Evolution sets itself to be the default mailer.  If the 
user says "no", Evolution won't change anything.  There is a check box 
that asks whether the user wants to be asked this question every time 
Evolution is started.  If the check box is not checked, Evolution will 
never ask the question again.  If it is checked, Evolution will only ask 
if there is either no mailer set up or if another mailer is set as the 
default one.

This is my first attempt at a patch, so any feedback would be 
appreciated.  Thanks,

Jonathan Dieter
jdieter99 at gmx dot net

diff -Naur evolution-2.0.2/mail/mail-component.c evolution-2.0.2-new/mail/mail-component.c
--- evolution-2.0.2/mail/mail-component.c	2004-09-24 18:49:29.000000000 +0300
+++ evolution-2.0.2-new/mail/mail-component.c	2005-03-02 23:34:40.373233696 +0200
@@ -70,6 +70,9 @@
 #include "e-task-bar.h"
 
 #include <gtk/gtklabel.h>
+#include <gtk/gtk.h>
+
+#include <gconf/gconf.h>
 
 #include <e-util/e-mktemp.h>
 
@@ -834,6 +837,49 @@
 	epv->upgradeFromVersion      = impl_upgradeFromVersion;
 }
 
+/* Check whether or not we are the default mailer */
+static void
+dialogCheckForDefault ()
+{
+	GtkWidget   *dialogDefaultEmailApp, *checkAlways;
+	GConfClient *gconfclientDefault;
+	gchar       *mailer;
+	gboolean    nocheckDefault, enabled;
+	gint        result;
+	
+	gconfclientDefault = gconf_client_get_default();
+	nocheckDefault = gconf_client_get_bool(gconfclientDefault, "/apps/evolution/mail/prompts/nocheckdefault", NULL);
+	
+	if(nocheckDefault == FALSE) { /* Check whether we're supposed to check whether or not we are the default mailer */
+		enabled = gconf_client_get_bool  (gconfclientDefault, "/desktop/gnome/url-handlers/mailto/enabled", NULL);
+		mailer  = gconf_client_get_string(gconfclientDefault, "/desktop/gnome/url-handlers/mailto/command", NULL);
+		
+		if(enabled == FALSE || mailer == NULL || strcmp(mailer, "@evolution %s") != 0) { /* Check whether we are the mailer */
+			/*Create modal MessageDialog */
+			dialogDefaultEmailApp = gtk_message_dialog_new(NULL, GTK_DIALOG_MODAL, GTK_MESSAGE_QUESTION, GTK_BUTTONS_YES_NO, "Do you want to make Evolution your default e-mail application?");
+			
+			checkAlways           = gtk_check_button_new_with_label("Always ask this question");
+			gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(checkAlways), TRUE);
+			
+			gtk_container_add(GTK_CONTAINER(GTK_DIALOG(dialogDefaultEmailApp)->vbox), checkAlways);
+		
+			gtk_widget_show_all(dialogDefaultEmailApp);
+			
+			result = gtk_dialog_run(GTK_DIALOG(dialogDefaultEmailApp));
+			
+			/* Check results */
+			if(result == GTK_RESPONSE_YES) {
+				gconf_client_set_bool(gconfclientDefault, "/desktop/gnome/url-handlers/mailto/enabled", TRUE, NULL);
+				gconf_client_set_string(gconfclientDefault, "/desktop/gnome/url-handlers/mailto/command", "@evolution %s", NULL);
+			}
+			if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(checkAlways)) == FALSE) {
+				gconf_client_set_bool(gconfclientDefault, "/apps/evolution/mail/prompts/nocheckdefault", TRUE, NULL);
+			}
+			gtk_widget_destroy(dialogDefaultEmailApp);
+		}
+	}
+}
+
 static void
 mail_component_init (MailComponent *component)
 {
@@ -862,6 +908,8 @@
 	
 	offline = mail_offline_handler_new();
 	bonobo_object_add_interface((BonoboObject *)component, (BonoboObject *)offline);
+	
+	dialogCheckForDefault();
 }
 
 /* Public API.  */