java/debugger/impl/src/com/intellij/debugger/actions/EvaluateActionHandler.java

/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * Class EvaluateAction
 * @author Jeka
 */
package com.intellij.debugger.actions;

import com.intellij.debugger.DebuggerInvocationUtil;
import com.intellij.debugger.engine.evaluation.CodeFragmentKind;
import com.intellij.debugger.engine.evaluation.EvaluateException;
import com.intellij.debugger.engine.evaluation.TextWithImports;
import com.intellij.debugger.engine.evaluation.TextWithImportsImpl;
import com.intellij.debugger.engine.events.DebuggerContextCommandImpl;
import com.intellij.debugger.impl.DebuggerContextImpl;
import com.intellij.debugger.impl.DebuggerSession;
import com.intellij.debugger.impl.DebuggerUtilsEx;
import com.intellij.debugger.settings.DebuggerSettings;
import com.intellij.debugger.ui.ExpressionEvaluationDialog;
import com.intellij.debugger.ui.StatementEvaluationDialog;
import com.intellij.debugger.ui.impl.watch.DebuggerTreeNodeExpression;
import com.intellij.debugger.ui.impl.watch.DebuggerTreeNodeImpl;
import com.intellij.debugger.ui.impl.watch.ValueDescriptorImpl;
import com.intellij.debugger.ui.impl.watch.WatchItemDescriptor;
import com.intellij.openapi.actionSystem.AnActionEvent;
import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.actionSystem.DataKeys;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.ui.DialogWrapper;
import com.intellij.openapi.ui.Messages;
import com.intellij.xdebugger.impl.actions.DebuggerActionHandler;
import org.jetbrains.annotations.NotNull;

public class EvaluateActionHandler extends DebuggerActionHandler {
  public boolean isEnabled(@NotNull final Project project, final AnActionEvent event) {
    DebuggerContextImpl context = DebuggerAction.getDebuggerContext(event.getDataContext());

    if(context != null) {
      DebuggerSession debuggerSession = context.getDebuggerSession();
      return debuggerSession != null && debuggerSession.isPaused();
    }

    return false;
  }

  public void perform(@NotNull final Project project, final AnActionEvent event) {
    final DataContext dataContext = event.getDataContext();
    final DebuggerContextImpl context = DebuggerAction.getDebuggerContext(dataContext);

    if(context == null) {
      return;
    }

    final Editor editor = event.getData(DataKeys.EDITOR);

    TextWithImports editorText = DebuggerUtilsEx.getEditorText(editor);
    if (editorText == null) {
      final DebuggerTreeNodeImpl selectedNode = DebuggerAction.getSelectedNode(dataContext);
      final String actionName = event.getPresentation().getText();

      if (selectedNode != null && selectedNode.getDescriptor() instanceof ValueDescriptorImpl) {
        context.getDebugProcess().getManagerThread().schedule(new DebuggerContextCommandImpl(context) {
          public void threadAction() {
            try {
              final TextWithImports evaluationText = DebuggerTreeNodeExpression.createEvaluationText(selectedNode, context);
              DebuggerInvocationUtil.swingInvokeLater(project, new Runnable() {
                public void run() {
                  showEvaluationDialog(project, evaluationText);
                }
              });
            }
            catch (final EvaluateException e1) {
              DebuggerInvocationUtil.swingInvokeLater(project, new Runnable() {
                public void run() {
                  Messages.showErrorDialog(project, e1.getMessage(), actionName);
                }
              });
            }
          }

          protected void commandCancelled() {
            DebuggerInvocationUtil.swingInvokeLater(project, new Runnable() {
              public void run() {
                if(selectedNode.getDescriptor() instanceof WatchItemDescriptor) {
                  try {
                    TextWithImports editorText = DebuggerTreeNodeExpression.createEvaluationText(selectedNode, context);
                    showEvaluationDialog(project, editorText);
                  }
                  catch (EvaluateException e1) {
                    Messages.showErrorDialog(project, e1.getMessage(), actionName);
                  }
                }
              }
            });
          }
        });
        return;
      }
    }

    showEvaluationDialog(project, editorText);
  }

  public static void showEvaluationDialog(Project project, TextWithImports defaultExpression, String dialogType) {
    if(defaultExpression == null) {
      defaultExpression = new TextWithImportsImpl(CodeFragmentKind.EXPRESSION, "");
    }

    CodeFragmentKind kind = DebuggerSettings.EVALUATE_FRAGMENT.equals(dialogType) ? CodeFragmentKind.CODE_BLOCK : CodeFragmentKind.EXPRESSION;

    DebuggerSettings.getInstance().EVALUATION_DIALOG_TYPE = dialogType;
    TextWithImportsImpl text = new TextWithImportsImpl(kind, defaultExpression.getText(), defaultExpression.getImports(), defaultExpression.getFileType());

    final DialogWrapper dialog;
    if(DebuggerSettings.EVALUATE_FRAGMENT.equals(dialogType)) {
      dialog = new StatementEvaluationDialog(project, text);
    }
    else {
      dialog = new ExpressionEvaluationDialog(project, text);
    }

    dialog.show();
  }

  public static void showEvaluationDialog(Project project, TextWithImports text) {
    showEvaluationDialog(project, text, DebuggerSettings.getInstance().EVALUATION_DIALOG_TYPE);
  }
}