/*
* Copyright 2003-2015 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 jetbrains.mps.openapi.navigation;
import jetbrains.mps.project.Project;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.mps.openapi.model.SNode;
import org.jetbrains.mps.openapi.model.SNodeReference;
import org.jetbrains.mps.util.Condition;
/**
* Handy facility to replace code like:
* <pre>
* final SNodeReference nodeRef = ...;
* getProject().getModelAccess().runWriteInEDT(new Runnable() {
* public void run() {
* SNode target = nodeRef.resolve(getProject().getRepository());
* if (target != null) {
* NavigationSupport.getInstance().openNode(getProject(), target, true, false);
* }
* }
* }
* </pre>
*
* Instead, this class could be used:
* <pre>
* final SNodeReference nodeRef = ...;
* new EditorNavigator(getProject()).shallFocus(true).open(nodeRef);
* </pre>
*
* Primary benefit is that we hide all the knowledge about read/write model and thread access.
*
* @author Artem Tikhomirov
* @since 3.3
*/
public final class EditorNavigator {
private final Project myProject;
private boolean myFocus = false;
private boolean mySelect = false;
private Condition<SNode> mySelectCondition;
public EditorNavigator(@NotNull Project mpsProject) {
myProject = mpsProject;
}
/**
* Default: no focus, <code>false</code>
*/
public EditorNavigator shallFocus(boolean shallFocus) {
myFocus = shallFocus;
return this;
}
/**
* Default: no selection, <code>false</code>
*/
public EditorNavigator shallSelect(boolean shallSelect) {
mySelect = shallSelect;
return this;
}
public EditorNavigator selectIfChild() {
mySelectCondition = new Condition<SNode>() {
@Override
public boolean met(SNode node) {
return node.getParent() != null;
}
};
return this;
}
public void open(@NotNull final SNodeReference node) {
myProject.getModelAccess().runWriteInEDT(new Runnable() {
@Override
public void run() {
SNode target = node.resolve(myProject.getRepository());
if (target != null) {
NavigationSupport.getInstance().openNode(myProject, target, needFocus(target), needSelection(target));
}
}
});
}
/*package*/ boolean needSelection(SNode target) {
if (mySelectCondition != null) {
return mySelectCondition.met(target);
}
return mySelect;
}
/*package*/ boolean needFocus(SNode target) {
return myFocus;
}
}