Expanding the syntax supported by playground to pick preview

scripts/cn1playground/common/src/main/java/bsh/BSHAllocationExpression.java

@@ -305,6 +305,7 @@ private Object constructObject(Class<?> type, Object[] args,
                 // clean up, prevent memory leak
                 This.registerConstructorContext(null, null);
         }
+        com.codenameone.playground.PlaygroundContext.notifyConstructed(obj);
         String className = type.getName();
         // Is it an inner class?
         if ( className.indexOf("$") == -1 )

scripts/cn1playground/common/src/main/java/bsh/cn1/GeneratedCN1Access.java

@@ -1599,7 +1599,7 @@ private static void fillMethodIndex9(Map<String, String[]> index) {
         index.put("com.codename1.xml.XMLParser", splitMembers(""));
         index.put("com.codename1.xml.XMLWriter", splitMembers(""));
         index.put("com.codenameone.playground.CN1Playground", splitMembers("destroy()getTheme()init(Object)runApp()start()stop()"));
-        index.put("com.codenameone.playground.PlaygroundContext", splitMembers("captureShownForm(Form)clearPreview()clearShownForm()getHostForm()getPreviewRoot()getShownForm()getTheme()log(String)refreshPreview()setTitle(String)debug(String)getCurrent()interceptMethodInvocation(Object, String, Object[])"));
+        index.put("com.codenameone.playground.PlaygroundContext", splitMembers("captureShownForm(Form)clearCreatedComponents()clearPreview()clearShownForm()getCreatedComponents()getFirstCreatedComponent()getFirstCreatedForm()getHostForm()getPreviewRoot()getShownForm()getTheme()log(String)recordCreatedComponent(Component)refreshPreview()setTitle(String)debug(String)getCurrent()interceptMethodInvocation(Object, String, Object[])notifyConstructed(Object)"));
         index.put("com.codenameone.playground.PlaygroundContext.Logger", splitMembers("log(String)"));
         index.put("com.codenameone.playground.PlaygroundLambdaBridge", splitMembers("lambda(Object[], String)lambda(String[], String)"));
         index.put("com.codenameone.playground.PlaygroundListenerBridge", splitMembers("actionListener(Object)networkListener(Object)onComplete(Object)runnable(Object)"));

scripts/cn1playground/common/src/main/java/bsh/cn1/gen/GeneratedAccess_com_codenameone_playground.java

@@ -79,6 +79,12 @@ private static Object invokeStatic0(String name, Object[] safeArgs) throws Excep
                 return com.codenameone.playground.PlaygroundContext.interceptMethodInvocation((java.lang.Object) adaptedArgs[0], (java.lang.String) adaptedArgs[1], (java.lang.Object[]) adaptedArgs[2]);
             }
         }
+        if ("notifyConstructed".equals(name)) {
+            if (matches(safeArgs, new Class<?>[]{java.lang.Object.class}, false)) {
+                Object[] adaptedArgs = adaptArgs(safeArgs, new Class<?>[]{java.lang.Object.class}, false);
+                com.codenameone.playground.PlaygroundContext.notifyConstructed((java.lang.Object) adaptedArgs[0]); return null;
+            }
+        }
         throw unsupportedStatic(com.codenameone.playground.PlaygroundContext.class, name, safeArgs);
     }
 
@@ -175,6 +181,11 @@ private static Object invoke1(com.codenameone.playground.PlaygroundContext typed
                 typedTarget.captureShownForm((com.codename1.ui.Form) adaptedArgs[0]); return null;
             }
         }
+        if ("clearCreatedComponents".equals(name)) {
+            if (safeArgs.length == 0) {
+                typedTarget.clearCreatedComponents(); return null;
+            }
+        }
         if ("clearPreview".equals(name)) {
             if (safeArgs.length == 0) {
                 typedTarget.clearPreview(); return null;
@@ -185,6 +196,21 @@ private static Object invoke1(com.codenameone.playground.PlaygroundContext typed
                 typedTarget.clearShownForm(); return null;
             }
         }
+        if ("getCreatedComponents".equals(name)) {
+            if (safeArgs.length == 0) {
+                return typedTarget.getCreatedComponents();
+            }
+        }
+        if ("getFirstCreatedComponent".equals(name)) {
+            if (safeArgs.length == 0) {
+                return typedTarget.getFirstCreatedComponent();
+            }
+        }
+        if ("getFirstCreatedForm".equals(name)) {
+            if (safeArgs.length == 0) {
+                return typedTarget.getFirstCreatedForm();
+            }
+        }
         if ("getHostForm".equals(name)) {
             if (safeArgs.length == 0) {
                 return typedTarget.getHostForm();
@@ -211,6 +237,12 @@ private static Object invoke1(com.codenameone.playground.PlaygroundContext typed
                 typedTarget.log((java.lang.String) adaptedArgs[0]); return null;
             }
         }
+        if ("recordCreatedComponent".equals(name)) {
+            if (matches(safeArgs, new Class<?>[]{com.codename1.ui.Component.class}, false)) {
+                Object[] adaptedArgs = adaptArgs(safeArgs, new Class<?>[]{com.codename1.ui.Component.class}, false);
+                typedTarget.recordCreatedComponent((com.codename1.ui.Component) adaptedArgs[0]); return null;
+            }
+        }
         if ("refreshPreview".equals(name)) {
             if (safeArgs.length == 0) {
                 typedTarget.refreshPreview(); return null;

scripts/cn1playground/common/src/main/java/com/codenameone/playground/PlaygroundContext.java

@@ -1,11 +1,15 @@
 package com.codenameone.playground;
 
+import com.codename1.ui.CN;
+import com.codename1.ui.Component;
 import com.codename1.ui.Container;
 import com.codename1.ui.Dialog;
 import com.codename1.ui.Form;
-import com.codename1.ui.CN;
 import com.codename1.ui.util.Resources;
 
+import java.util.ArrayList;
+import java.util.List;
+
 /**
  * Host objects and helpers exposed to user scripts.
  */
@@ -21,6 +25,9 @@ public interface Logger {
     private final Resources theme;
     private final Logger logger;
     private Form shownForm;
+    private final List<Component> createdComponents = new ArrayList<Component>();
+    private Form firstCreatedForm;
+    private Component firstCreatedComponent;
 
     public PlaygroundContext(Form hostForm, Container previewRoot, Resources theme, Logger logger) {
         this.hostForm = hostForm;
@@ -56,6 +63,17 @@ public static PlaygroundContext getCurrent() {
     public static void debug(String message) {
     }
 
+    public static void notifyConstructed(Object instance) {
+        if (!(instance instanceof Component)) {
+            return;
+        }
+        PlaygroundContext context = CURRENT.get();
+        if (context == null) {
+            return;
+        }
+        context.recordCreatedComponent((Component) instance);
+    }
+
     public static boolean interceptMethodInvocation(Object target, String methodName, Object[] args) {
         PlaygroundContext context = CURRENT.get();
         if (context == null) {
@@ -91,6 +109,37 @@ public void clearShownForm() {
         shownForm = null;
     }
 
+    public void recordCreatedComponent(Component component) {
+        if (component == null || component == hostForm || component == previewRoot) {
+            return;
+        }
+        if (firstCreatedComponent == null) {
+            firstCreatedComponent = component;
+        }
+        if (firstCreatedForm == null && component instanceof Form) {
+            firstCreatedForm = (Form) component;
+        }
+        createdComponents.add(component);
+    }
+
+    public Component getFirstCreatedComponent() {
+        return firstCreatedComponent;
+    }
+
+    public Form getFirstCreatedForm() {
+        return firstCreatedForm;
+    }
+
+    public List<Component> getCreatedComponents() {
+        return createdComponents;
+    }
+
+    public void clearCreatedComponents() {
+        createdComponents.clear();
+        firstCreatedForm = null;
+        firstCreatedComponent = null;
+    }
+
     public void clearPreview() {
         previewRoot.removeAll();
         previewRoot.revalidate();