Add libnotify as optional in zenity instalation

configure.in

@@ -64,7 +64,19 @@ AC_PATH_PROG([PERL],[perl],)
 
 LIBNOTIFY_REQUIRED=0.6.1
 
-PKG_CHECK_MODULES([LIBNOTIFY],[libnotify >= $LIBNOTIFY_REQUIRED])
+AC_ARG_ENABLE([libnotify],
+              AC_HELP_STRING([--enable-libnotify], [enable libnotify support]),,
+              [enable_libnotify=yes])
+
+if test x$enable_libnotify = xyes; then
+        PKG_CHECK_MODULES([LIBNOTIFY], [libnotify >= $LIBNOTIFY_REQUIRED],
+                          [HAVE_LIBNOTIFY="yes"],[HAVE_LIBNOTIFY="no"])
+        AC_SUBST([LIBNOTIFY_CFLAGS])
+        AC_SUBST([LIBNOTIFY_LIBS])
+        if test "x$HAVE_LIBNOTIFY" = "xyes"; then
+                AC_DEFINE([HAVE_LIBNOTIFY], [1], [libnotify is available on this machine])
+        fi
+fi
 
 # *******************************
 # Debug

src/main.c

@@ -75,9 +75,11 @@ main (gint argc, gchar **argv) {
       results->tree_data->data = (const gchar **) argv + 1;
       zenity_tree (results->data, results->tree_data);
       break;
+#ifdef HAVE_LIBNOTIFY
     case MODE_NOTIFICATION:
       zenity_notification (results->data, results->notification_data);
       break;
+#endif
     case MODE_PROGRESS:
       zenity_progress (results->data, results->progress_data);
       break;

src/notification.c

@@ -34,6 +34,7 @@
 #include "zenity.h"
 #include "util.h"
 
+#ifdef HAVE_LIBNOTIFY
 static char *icon_file;
 
 static void
@@ -233,3 +234,4 @@ zenity_notification (ZenityData *data, ZenityNotificationData *notification_data
 
   gtk_main ();
 }
+#endif

src/option.c

@@ -76,9 +76,11 @@ static gchar   *zenity_list_print_column;
 static gchar   *zenity_list_hide_column;
 static gboolean zenity_list_hide_header;
 
+#ifdef HAVE_LIBNOTIFY
 /* Notification Dialog Options */
 static gboolean zenity_notification_active;
 static gboolean zenity_notification_listen;
+#endif
 
 /* Progress Dialog Options */
 static gboolean zenity_progress_active;
@@ -527,6 +529,7 @@ static GOptionEntry list_options[] = {
   } 
 };
 
+#ifdef HAVE_LIBNOTIFY
 static GOptionEntry notification_options[] = {
   {
     "notification",
@@ -560,6 +563,8 @@ static GOptionEntry notification_options[] = {
   }
 };
 
+#endif
+
 static GOptionEntry progress_options[] = {
   {
     "progress",
@@ -927,7 +932,9 @@ zenity_option_init (void) {
   results->progress_data = g_new0 (ZenityProgressData, 1); 
   results->text_data = g_new0 (ZenityTextData, 1);
   results->tree_data = g_new0 (ZenityTreeData, 1);
+#ifdef HAVE_LIBNOTIFY
   results->notification_data = g_new0 (ZenityNotificationData, 1);
+#endif
   results->color_data = g_new0 (ZenityColorData, 1);
   results->password_data = g_new0 (ZenityPasswordData, 1);
 }
@@ -1109,6 +1116,7 @@ zenity_list_pre_callback (GOptionContext *context,
   return TRUE;
 }
 
+#ifdef HAVE_LIBNOTIFY
 static gboolean
 zenity_notification_pre_callback (GOptionContext *context,
 		                  GOptionGroup   *group,
@@ -1120,6 +1128,7 @@ zenity_notification_pre_callback (GOptionContext *context,
 
   return TRUE;
 }
+#endif
 
 static gboolean
 zenity_progress_pre_callback (GOptionContext *context,
@@ -1443,6 +1452,7 @@ zenity_list_post_callback (GOptionContext *context,
   return TRUE;
 }
 
+#ifdef HAVE_LIBNOTIFY
 static gboolean
 zenity_notification_post_callback (GOptionContext *context,
 		                   GOptionGroup   *group,
@@ -1462,6 +1472,7 @@ zenity_notification_post_callback (GOptionContext *context,
 
   return TRUE;
 }
+#endif
 
 static gboolean
 zenity_progress_post_callback (GOptionContext *context,
@@ -1714,7 +1725,8 @@ zenity_create_context (void)
   g_option_group_set_error_hook (a_group, zenity_option_error_callback);
   g_option_group_set_translation_domain (a_group, GETTEXT_PACKAGE);
   g_option_context_add_group(tmp_ctx, a_group);
-  
+ 
+#ifdef HAVE_LIBNOTIFY 
   /* Adds notification option entries */
   a_group = g_option_group_new("notification", 
                                N_("Notification icon options"), 
@@ -1725,6 +1737,7 @@ zenity_create_context (void)
   g_option_group_set_error_hook (a_group, zenity_option_error_callback);
   g_option_group_set_translation_domain (a_group, GETTEXT_PACKAGE);
   g_option_context_add_group(tmp_ctx, a_group);
+#endif
   
   /* Adds progress option entries */
   a_group = g_option_group_new("progress", 

src/option.h

@@ -44,7 +44,9 @@ typedef enum {
   MODE_WARNING,
   MODE_SCALE,
   MODE_INFO,
+#ifdef HAVE_LIBNOTIFY
   MODE_NOTIFICATION,
+#endif
   MODE_COLOR,
   MODE_PASSWORD,
   MODE_ABOUT,
@@ -71,7 +73,9 @@ typedef struct {
   ZenityProgressData     *progress_data;
   ZenityTextData         *text_data;
   ZenityTreeData         *tree_data;
+#ifdef HAVE_LIBNOTIFY
   ZenityNotificationData *notification_data;
+#endif
   ZenityColorData        *color_data;
   ZenityPasswordData     *password_data;
 } ZenityParsingOptions;

src/zenity.h

@@ -121,10 +121,12 @@ typedef struct {
   const gchar **data;
 } ZenityTreeData;
 
+#ifdef HAVE_LIBNOTIFY
 typedef struct {
   gchar   *notification_text;
   gboolean listen;
 } ZenityNotificationData;
+#endif
 
 typedef struct {
   gchar   *color;
@@ -152,8 +154,11 @@ void    zenity_text             (ZenityData             *data,
                                  ZenityTextData         *text_data);
 void    zenity_tree             (ZenityData             *data,
                                  ZenityTreeData         *tree_data);
+#ifdef HAVE_LIBNOTIFY
 void	zenity_notification	(ZenityData		*data,
 				 ZenityNotificationData	*notification_data);
+#endif
+
 void    zenity_colorselection   (ZenityData             *data,
                                  ZenityColorData        *notification_data);
 void	zenity_scale		(ZenityData		*data,