All notification urgencies can now use 0 as timeout to not expire (#158)

src/configModel/configModel.vala

@@ -287,7 +287,7 @@ namespace SwayNotificationCenter {
                 return _timeout;
             }
             set {
-                _timeout = value < 1 ? TIMEOUT_DEFAULT : value;
+                _timeout = value < 0 ? TIMEOUT_DEFAULT : value;
             }
         }
 
@@ -299,19 +299,7 @@ namespace SwayNotificationCenter {
                 return _timeout_low;
             }
             set {
-                _timeout_low = value < 1 ? TIMEOUT_LOW_DEFAULT : value;
-            }
-        }
-
-        /** The transition time for all animations */
-        private const int TRANSITION_TIME_DEFAULT = 200;
-        private int _transition_time = TRANSITION_TIME_DEFAULT;
-        public int transition_time {
-            get {
-                return _transition_time;
-            }
-            set {
-                _transition_time = value < 0 ? TRANSITION_TIME_DEFAULT : value;
+                _timeout_low = value < 0 ? TIMEOUT_LOW_DEFAULT : value;
             }
         }
 
@@ -327,6 +315,18 @@ namespace SwayNotificationCenter {
             }
         }
 
+        /** The transition time for all animations */
+        private const int TRANSITION_TIME_DEFAULT = 200;
+        private int _transition_time = TRANSITION_TIME_DEFAULT;
+        public int transition_time {
+            get {
+                return _transition_time;
+            }
+            set {
+                _transition_time = value < 0 ? TRANSITION_TIME_DEFAULT : value;
+            }
+        }
+
         /*
          * Specifies if the control center should use keyboard shortcuts
          * and block keyboard input for other applications while open

src/notification/notification.vala

@@ -474,20 +474,19 @@ namespace SwayNotificationCenter {
                     timeout = timeout_delay * 1000;
                     break;
                 case UrgencyLevels.CRITICAL:
-                    if (timeout_critical_delay == 0) {
-                        return;
-                    }
+                    // Critical notifications should not automatically expire.
+                    // Ignores the notifications expire_timeout.
+                    if (timeout_critical_delay == 0) return;
                     timeout = timeout_critical_delay * 1000;
                     break;
             }
             uint ms = param.expire_timeout > 0 ? param.expire_timeout : timeout;
-            if (ms != 0) {
+            if (ms <= 0) return;
             timeout_id = Timeout.add (ms, () => {
                 close_notification (true);
                 return GLib.Source.REMOVE;
             });
         }
-        }
 
         public void remove_noti_timeout () {
             if (timeout_id > 0) {