show close confirmation

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWF.java

@@ -547,6 +547,15 @@ public final class SWF implements SWFContainerItem, Timelined {
         }
     }
 
+    public boolean isModified() {
+        for (Tag tag : tags) {
+            if (tag.isModified()) {
+                return true;
+            }
+        }
+        return false;
+    }
+    
     public void clearModified() {
         for (Tag tag : tags) {
             if (tag.isModified()) {

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/configuration/Configuration.java

@@ -366,6 +366,10 @@ public class Configuration {
     @ConfigurationCategory("ui")
     public static final ConfigurationItem<Boolean> autoLoadEmbeddedSwfs = null;
 
+    @ConfigurationDefaultBoolean(true)
+    @ConfigurationCategory("ui")
+    public static final ConfigurationItem<Boolean> showCloseConfirmation = null;
+
     private enum OSId {
 
         WINDOWS, OSX, UNIX