java/debugger/impl/src/com/intellij/debugger/actions/BaseValueAction.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.
 */

/*
 * @author max
 */
package com.intellij.debugger.actions;

import com.intellij.debugger.DebuggerBundle;
import com.intellij.debugger.DebuggerInvocationUtil;
import com.intellij.debugger.DebuggerManagerEx;
import com.intellij.debugger.engine.events.SuspendContextCommandImpl;
import com.intellij.debugger.impl.DebuggerContextImpl;
import com.intellij.debugger.impl.DebuggerUtilsEx;
import com.intellij.debugger.ui.impl.watch.DebuggerTreeNodeImpl;
import com.intellij.debugger.ui.impl.watch.NodeDescriptorImpl;
import com.intellij.debugger.ui.impl.watch.ValueDescriptorImpl;
import com.intellij.debugger.ui.tree.ValueDescriptor;
import com.intellij.openapi.actionSystem.AnActionEvent;
import com.intellij.openapi.actionSystem.CommonDataKeys;
import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.actionSystem.Presentation;
import com.intellij.openapi.progress.util.ProgressWindowWithNotification;
import com.intellij.openapi.project.Project;
import com.sun.jdi.Value;
import org.jetbrains.annotations.Nullable;

/*
 * @author Jeka
 */
public abstract class BaseValueAction extends DebuggerAction {

  public void actionPerformed(AnActionEvent e) {
    final DataContext actionContext = e.getDataContext();
    final Project project = CommonDataKeys.PROJECT.getData(actionContext);
    final DebuggerTreeNodeImpl node = getSelectedNode(actionContext);
    final String text = getValueText(node);
    if (text != null) {
      DebuggerInvocationUtil.swingInvokeLater(project, new Runnable() {
        public void run() {
          processText(project, DebuggerUtilsEx.prepareValueText(text, project), node, null);
        }
      });
      return;
    }
    final Value value = getValue(node);
    if (value == null) {
      return;
    }
    final DebuggerManagerEx debuggerManager = DebuggerManagerEx.getInstanceEx(project);
    if(debuggerManager == null) {
      return;
    }
    final DebuggerContextImpl debuggerContext = debuggerManager.getContext();
    if (debuggerContext == null || debuggerContext.getDebuggerSession() == null) {
      return;
    }

    final ProgressWindowWithNotification progressWindow = new ProgressWindowWithNotification(true, project);
    SuspendContextCommandImpl getTextCommand = new SuspendContextCommandImpl(debuggerContext.getSuspendContext()) {
      public Priority getPriority() {
        return Priority.HIGH;
      }

      public void contextAction() throws Exception {
        //noinspection HardCodedStringLiteral
        progressWindow.setText(DebuggerBundle.message("progress.evaluating", "toString()"));

        final String valueAsString = DebuggerUtilsEx.getValueOrErrorAsString(debuggerContext.createEvaluationContext(), value);

        if (progressWindow.isCanceled()) {
          return;
        }

        DebuggerInvocationUtil.swingInvokeLater(project, new Runnable() {
          public void run() {
            String text = valueAsString;
            if (text == null) {
              text = "";
            }
            processText(project, text, node, debuggerContext);
          }
        });
      }
    };
    progressWindow.setTitle(DebuggerBundle.message("title.evaluating"));
    debuggerContext.getDebugProcess().getManagerThread().startProgress(getTextCommand, progressWindow);
  }

  protected abstract void processText(final Project project, String text, DebuggerTreeNodeImpl node, DebuggerContextImpl debuggerContext);

  public void update(AnActionEvent e) {
    Presentation presentation = e.getPresentation();
    Value value = getValue(getSelectedNode(e.getDataContext()));
    presentation.setEnabled(value != null);
    presentation.setVisible(value != null);
  }

  @Nullable
  private static String getValueText(final DebuggerTreeNodeImpl node) {
    if (node == null) {
      return null;
    }
    NodeDescriptorImpl descriptor = node.getDescriptor();
    if (descriptor instanceof ValueDescriptorImpl) {
      return ((ValueDescriptorImpl)descriptor).getValueText();
    }
    return null;
  }

  @Nullable
  private static Value getValue(final DebuggerTreeNodeImpl node) {
    if (node == null) {
      return null;
    }
    NodeDescriptorImpl descriptor = node.getDescriptor();
    if (!(descriptor instanceof ValueDescriptor)) {
      return null;
    }
    return ((ValueDescriptor)descriptor).getValue();
  }
}