// Copyright (c) 2009 The Chromium Authors. All rights reserved.

// Use of this source code is governed by a BSD-style license that can be

// found in the LICENSE file.

package org.chromium.debug.ui.actions;

import org.chromium.debug.core.ChromiumDebugPlugin;

import org.chromium.debug.core.model.StackFrame;

import org.chromium.debug.core.model.Value;

import org.chromium.sdk.JsVariable;

import org.eclipse.core.runtime.PlatformObject;

import org.eclipse.debug.core.DebugEvent;

import org.eclipse.debug.core.DebugPlugin;

import org.eclipse.debug.core.IDebugEventSetListener;

import org.eclipse.debug.core.ILaunch;

import org.eclipse.debug.core.model.IDebugElement;

import org.eclipse.debug.core.model.IDebugTarget;

import org.eclipse.debug.core.model.IErrorReportingExpression;

import org.eclipse.debug.core.model.IValue;

/**

 * An Eclipse object for the JavaScript inspected expression.

 */

public class JsInspectExpression extends PlatformObject

    implements IErrorReportingExpression, IDebugEventSetListener {

  private final StackFrame stackFrame;

  private final JsVariable variable;

  private final String errorMessage;

  private final String expression;

  public JsInspectExpression(StackFrame stackFrame, String expression, JsVariable variable,

      String errorMessage) {

    this.stackFrame = stackFrame;

    this.expression = expression;

    this.variable = variable;

    this.errorMessage = errorMessage;

  }

  public String[] getErrorMessages() {

    return errorMessage == null

        ? new String[0]

        : new String[] { errorMessage };

  }

  public boolean hasErrors() {

    return errorMessage != null;

  }

  public void dispose() {

  }

  public IDebugTarget getDebugTarget() {

    IValue value = getValue();

    if (value != null) {

      return value.getDebugTarget();

    }

    return null;

  }

  public String getExpressionText() {

    return expression;

  }

  public IValue getValue() {

    return variable != null

        ? Value.create(stackFrame.getDebugTarget(), variable.getValue())

        : null;

  }

  public ILaunch getLaunch() {

    return getValue().getLaunch();

  }

  public String getModelIdentifier() {

    return ChromiumDebugPlugin.DEBUG_MODEL_ID;

  }

  public void handleDebugEvents(DebugEvent[] events) {

    for (DebugEvent event : events) {

      switch (event.getKind()) {

        case DebugEvent.TERMINATE:

          if (event.getSource().equals(getDebugTarget())) {

            DebugPlugin.getDefault().getExpressionManager().removeExpression(this);

          }

          break;

        case DebugEvent.SUSPEND:

          if (event.getDetail() != DebugEvent.EVALUATION_IMPLICIT &&

              event.getSource() instanceof IDebugElement) {

            IDebugElement source = (IDebugElement) event.getSource();

            if (source.getDebugTarget().equals(getDebugTarget())) {

              DebugPlugin.getDefault().fireDebugEventSet(new DebugEvent[] {

                  new DebugEvent(this, DebugEvent.CHANGE, DebugEvent.CONTENT) });

            }

          }

          break;

      }

    }

  }

}