/*
* Copyright 2000-2016 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.
*/
package com.intellij.xdebugger.impl.ui.tree.nodes;
import com.intellij.icons.AllIcons;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.util.ThreeState;
import com.intellij.xdebugger.Obsolescent;
import com.intellij.xdebugger.XExpression;
import com.intellij.xdebugger.evaluation.XDebuggerEvaluator;
import com.intellij.xdebugger.evaluation.XInstanceEvaluator;
import com.intellij.xdebugger.frame.*;
import com.intellij.xdebugger.frame.presentation.XErrorValuePresentation;
import com.intellij.xdebugger.frame.presentation.XValuePresentation;
import com.intellij.xdebugger.impl.ui.XDebuggerUIConstants;
import com.intellij.xdebugger.impl.ui.tree.XDebuggerTree;
import consulo.concurrency.Promises;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.concurrency.Promise;
/**
* @author nik
*/
public class WatchNodeImpl extends XValueNodeImpl implements WatchNode {
private final XExpression myExpression;
public WatchNodeImpl(@NotNull XDebuggerTree tree,
@NotNull WatchesRootNode parent,
@NotNull XExpression expression,
@Nullable XStackFrame stackFrame) {
super(tree, parent, expression.getExpression(), new XWatchValue(expression, tree, stackFrame));
myExpression = expression;
}
@Override
@NotNull
public XExpression getExpression() {
return myExpression;
}
@NotNull
@Override
public XValue getValueContainer() {
XValue container = super.getValueContainer();
XValue value = ((XWatchValue)container).myValue;
return value != null ? value : container;
}
void computePresentationIfNeeded() {
if (getValuePresentation() == null) {
getValueContainer().computePresentation(this, XValuePlace.TREE);
}
}
private static class XWatchValue extends XNamedValue {
private final XExpression myExpression;
private final XDebuggerTree myTree;
private final XStackFrame myStackFrame;
private volatile XValue myValue;
public XWatchValue(XExpression expression, XDebuggerTree tree, XStackFrame stackFrame) {
super(expression.getExpression());
myExpression = expression;
myTree = tree;
myStackFrame = stackFrame;
}
@Override
public void computeChildren(@NotNull XCompositeNode node) {
if (myValue != null) {
myValue.computeChildren(node);
}
}
@Override
public void computePresentation(@NotNull XValueNode node, @NotNull XValuePlace place) {
if (myStackFrame != null) {
if (myTree.isShowing() || ApplicationManager.getApplication().isUnitTestMode()) {
XDebuggerEvaluator evaluator = myStackFrame.getEvaluator();
if (evaluator != null) {
evaluator.evaluate(myExpression, new MyEvaluationCallback(node, place), myStackFrame.getSourcePosition());
}
}
}
else {
node.setPresentation(AllIcons.Debugger.Watch, EMPTY_PRESENTATION, false);
}
}
private class MyEvaluationCallback extends XEvaluationCallbackBase implements Obsolescent {
@NotNull private final XValueNode myNode;
@NotNull private final XValuePlace myPlace;
public MyEvaluationCallback(@NotNull XValueNode node, @NotNull XValuePlace place) {
myNode = node;
myPlace = place;
}
@Override
public boolean isObsolete() {
return myNode.isObsolete();
}
@Override
public void evaluated(@NotNull XValue result) {
myValue = result;
result.computePresentation(myNode, myPlace);
}
@Override
public void errorOccurred(@NotNull String errorMessage) {
myNode.setPresentation(XDebuggerUIConstants.ERROR_MESSAGE_ICON, new XErrorValuePresentation(errorMessage), false);
}
}
private static final XValuePresentation EMPTY_PRESENTATION = new XValuePresentation() {
@NotNull
@Override
public String getSeparator() {
return "";
}
@Override
public void renderValue(@NotNull XValueTextRenderer renderer) {
}
};
@Override
@Nullable
public String getEvaluationExpression() {
return myValue != null ? myValue.getEvaluationExpression() : null;
}
@Override
@NotNull
public Promise<XExpression> calculateEvaluationExpression() {
return Promises.resolve(myExpression);
}
@Override
@Nullable
public XInstanceEvaluator getInstanceEvaluator() {
return myValue != null ? myValue.getInstanceEvaluator() : null;
}
@Override
@Nullable
public XValueModifier getModifier() {
return myValue != null ? myValue.getModifier() : null;
}
@Override
public void computeSourcePosition(@NotNull XNavigatable navigatable) {
if (myValue != null) {
myValue.computeSourcePosition(navigatable);
}
}
@Override
@NotNull
public ThreeState computeInlineDebuggerData(@NotNull XInlineDebuggerDataCallback callback) {
return ThreeState.NO;
}
@Override
public boolean canNavigateToSource() {
return myValue != null && myValue.canNavigateToSource();
}
@Override
public boolean canNavigateToTypeSource() {
return myValue != null && myValue.canNavigateToTypeSource();
}
@Override
public void computeTypeSourcePosition(@NotNull XNavigatable navigatable) {
if (myValue != null) {
myValue.computeTypeSourcePosition(navigatable);
}
}
@Override
@Nullable
public XReferrersProvider getReferrersProvider() {
return myValue != null ? myValue.getReferrersProvider() : null;
}
}
}