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sclass JMiniJavaIDE is Swingable {
  settable SimpleLiveValue<S> lvScript = stringLiveValue();
  S sectionTitle = "Mini Java IDE";
  
  sS helpText = "Javaaa";
  
  transient CompileResult compileResult;
  transient RSyntaxTextAreaWithSearch taScript;
  transient new Q compileQ;
  transient JLabel lblCompileResult;
  transient JButton btnRun;
  
  transient JavaCompletionProvider completionProvider;
  transient AutoCompletion autoComplete;
  
  class JavaCompletionProvider extends DefaultCompletionProvider {
    @Override
    public L<Completion> getCompletionByInputText(S inputText) {
      print("getCompletionByInputText: " + quote(inputText));
      ret ll(
        /*new BasicCompletion(this, inputText + "YesYes"),
        new BasicCompletion(this, inputText + "NoNo")*/);
    }
    
    @Override
    public L<Completion> getCompletionsImpl(JTextComponent comp) {
      ret getCompletionByInputText(getAlreadyEnteredText(comp));
    }
  }
  
  visual {
    taScript = liveValueRSyntaxTextArea_bothWays(lvScript);
    awtCalcEvery(taScript.textArea(), 5.0, -> compileQ.add(r compile));
    
    swing {
      completionProvider = new JavaCompletionProvider;
      completionProvider.setAutoActivationRules(true, " ");
      autoComplete = new AutoCompletion(completionProvider);
      autoComplete.setAutoActivationEnabled(true);
      autoComplete.install(taScript.textArea);
    }

    ret jCenteredSection(sectionTitle,
      centerAndSouthWithMargin(
        taScript.visualize(),
        centerAndEastWithMargin(
          lblCompileResult = jlabel(),
          jline(
            btnRun = jbutton("Run" := rThread runButtonAction),
            jPopDownButton_noText(
              "Show Scripting Help", rThread { showTextWordWrapped("Gazelle 'Left arrow script' Help", helpText) },
            )
          ))));
  }
  
  bool visible() { ret isShowing(lblCompileResult); }
  
  void compile {
    var script = lvScript!;
    var result = compileResult;
    if (result == null || !eq(result.script, script)) {
      try {
        result = new CompileResult;
        result.script = script;
        result.className = "UserCode_" + now();
        result.adaptedScript = "class " + result.className + "{"
          + evalJava_prep(result.script)
          + "}";
        result.java = result.adaptedScript;
        //result.adaptedScript = "mainClassName " + result.className + "\n\n" + result.script;
        //result.java = transpileRaw(result.adaptedScript);

        result.compiledObject = veryQuickJava_finish_specialMainClass(result.className, result.java);
        print(compiledObject := result.compiledObject);
      } catch print e {
        result.compileError = e;
      }
      compileResult = result;
      setText(lblCompileResult, compileResult);
      updateRunButtonState();
    }
  }
  
  void updateRunButtonState() {
    setEnabled(btnRun, runButtonShouldBeEnabled());
  }
  
  swappable bool runButtonShouldBeEnabled() {
    ret compileResult != null && compileResult.runnable();
  }
  
  CompileResult freshCompileResult() {
    runInQAndWait(compileQ, r compile);
    ret compileResult;
  }
  
  O compiledObject() {
    ret freshCompileResult().compiledObject;
  }

  swappable void runButtonAction {
    runScript();
  }
  
  void runScript {
    //showText_fast_noWrap("Script Error", renderStackTrace(e));
    var result = freshCompileResult();
    if (result.compiledObject != null) {
      setStatus("Running");
      result.result = okOrError(-> callCalc(result.compiledObject));
      setStatus(result.result.isOK()
        ? shorten(str(result.result))
        : exceptionToStringShorter(result.result.error()));
    }
  }

  class CompileResult {
    S script, adaptedScript, java;
    S className;
    Class compiledObject;
    Throwable compileError;
    OKOrError result;

    toString {
      ret compileError != null ? exceptionToStringShorter(compileError) : "Compiled OK";
    }
    
    bool runnable() { ret compiledObject != null; }
  }

  swappable void modifyParser(GazelleV_LeftArrowScriptParser parser) {
    parser.allowTheWorld(mc());
  }
  
  void setStatus(S status) {
    setText(lblCompileResult, status);
  }
}