// Copyright (c) 2011 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.model.Variable;
import org.chromium.sdk.JsVariable;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.IExpressionManager;
import org.eclipse.debug.core.model.IWatchExpression;
/**
* A simple utility action to allow user see JavaScript property descriptors.
* Eclipse can't seem to have a proper UI to show both property value (main usecase) and
* property descriptor (rare usecase) in Variables/Expression views.
* <p>
* This action is enabled on object properties and builds JavaScript watch expression
* "Object.getOwnPropertyDescriptor(<object>, <propertyName>) that is
* hard to build manually every time.
* <p>
* User will have to manually remove old expressions.
*/
public abstract class WatchPropertyDescriptor extends VariableBasedAction {
public static class ForVariable extends WatchPropertyDescriptor {
public ForVariable() {
super(VARIABLE_VIEW_ELEMENT_HANDLER);
}
}
public static class ForExpression extends WatchPropertyDescriptor {
public ForExpression() {
super(EXPRESSION_VIEW_ELEMENT_HANDLER);
}
}
protected WatchPropertyDescriptor(ElementHandler elementHandler) {
super(elementHandler);
}
@Override
protected Runnable createRunnable(VariableWrapper wrapper) {
if (wrapper == null) {
return null;
}
Variable variable = wrapper.getVariable();
if (variable == null) {
return null;
}
Variable.Real realVariable = variable.asRealVariable();
if (realVariable == null) {
return null;
}
final JsVariable jsVariable = realVariable.getJsVariable();
final Variable.Real.HostObject hostObject = realVariable.getHostObject();
if (hostObject == null) {
return null;
}
return new Runnable() {
@Override
public void run() {
String subExpression = hostObject.getExpression();
String expression = "Object.getOwnPropertyDescriptor(" + subExpression + ", \"" +
jsVariable.getName() + "\")";
IExpressionManager expressionManager = DebugPlugin.getDefault().getExpressionManager();
IWatchExpression watchExpression = expressionManager.newWatchExpression(expression);
expressionManager.addExpression(watchExpression);
}
};
}
}