Remove SignalHandler class, not needed anymore: since #125 the arena is closed automatically

Author: jwharm

buildSrc/src/main/java/io/github/jwharm/javagi/configuration/ClassNames.java

@@ -57,7 +57,6 @@ public final class ClassNames {
     public static final ClassName BUILDER_INTERFACE = get(PKG_GOBJECT, "BuilderInterface");
     public static final ClassName INSTANCE_CACHE = get(PKG_GOBJECT, "InstanceCache");
     public static final ClassName JAVA_CLOSURE = get(PKG_GOBJECT, "JavaClosure");
-    public static final ClassName SIGNAL_CONNECTION = get(PKG_GOBJECT, "SignalConnection");
 
     public static final ClassName OVERRIDES = get(PKG_GOBJECT_TYPES, "Overrides");
     public static final ClassName PROPERTIES = get(PKG_GOBJECT_TYPES, "Properties");
@@ -66,7 +65,6 @@ public final class ClassNames {
     public static final ClassName TYPES = get(PKG_GOBJECT_TYPES, "Types");
 
     // Some frequently used class names
-    public final static ClassName DESTROY_NOTIFY = get("org.gnome.glib", "DestroyNotify");
     public final static ClassName GERROR = get("org.gnome.glib", "GError");
     public final static ClassName GLIB = get("org.gnome.glib", "GLib");
     public final static ClassName GTYPE = get("org.gnome.glib", "Type");

buildSrc/src/main/java/io/github/jwharm/javagi/generators/ClassGenerator.java

@@ -282,12 +282,12 @@ private MethodSpec gobjectConnect() {
                     
                     @param  detailedSignal a string of the form "signal-name::detail"
                     @param  callback       the callback to connect
-                    @return a SignalConnection object to track, block and disconnect the
+                    @return a signal handler id to track, block and disconnect the
                             signal connection
                     """)
                 .addModifiers(Modifier.PUBLIC)
                 .addTypeVariable(TypeVariableName.get("T"))
-                .returns(ClassNames.SIGNAL_CONNECTION)
+                .returns(int.class)
                 .addParameter(String.class, "detailedSignal")
                 .addParameter(TypeVariableName.get("T"), "callback")
                 .addStatement("return connect(detailedSignal, callback, false)")
@@ -303,21 +303,19 @@ private MethodSpec gobjectConnectAfter() {
                     @param callback       the callback to connect
                     @param after          whether the handler should be called before or
                                           after the default handler of the signal
-                    @return a SignalConnection object to track, block and disconnect the
+                    @return a signal handler id to track, block and disconnect the
                             signal connection
                     """)
                 .addModifiers(Modifier.PUBLIC)
                 .addTypeVariable(TypeVariableName.get("T"))
-                .returns(ClassNames.SIGNAL_CONNECTION)
+                .returns(int.class)
                 .addParameter(String.class, "detailedSignal")
                 .addParameter(TypeVariableName.get("T"), "callback")
                 .addParameter(boolean.class, "after")
                 .addStatement("$1T closure = new $1T(callback)",
                         ClassNames.JAVA_CLOSURE)
-                .addStatement("int handlerId = $T.signalConnectClosure(this, detailedSignal, closure, after)",
+                .addStatement("return $T.signalConnectClosure(this, detailedSignal, closure, after)",
                         ClassNames.GOBJECTS)
-                .addStatement("return new $T(handle(), handlerId, closure)",
-                        ClassNames.SIGNAL_CONNECTION)
                 .build();
     }