/*
* 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.nodeEditor.assist;
import jetbrains.mps.lang.editor.menus.transformation.MenuLocations;
import jetbrains.mps.nodeEditor.EditorSettings;
import jetbrains.mps.openapi.editor.EditorComponent;
import jetbrains.mps.openapi.editor.assist.ContextAssistant;
import jetbrains.mps.openapi.editor.assist.ContextAssistantManager;
import jetbrains.mps.openapi.editor.menus.transformation.TransformationMenuItem;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.mps.openapi.module.SRepository;
import java.util.List;
/**
* Serves as a facade for context assistant-related tasks. Internally delegates to {@link EditorContextAssistantsController} and
* {@link EditorContextAssistants}.
*/
public class DefaultContextAssistantManager implements ContextAssistantManager {
private final EditorComponent myEditorComponent;
private final EditorContextAssistants myAssistants;
private final EditorContextAssistantsController myController;
private final EditorSettings myEditorSettings;
public static DefaultContextAssistantManager newInstance(EditorComponent component, SRepository repository) {
SelectionMenuProvider executableContextAssistantItemsMenuProvider = new FilteringSelectionMenuProvider(
new SelectionMenuProviderByCellAndConcept(MenuLocations.CONTEXT_ASSISTANT),
new CanExecuteFilter());
EditorContextAssistants assistants = new EditorContextAssistants(
new AncestorOrSmallCellContextAssistantFinder(), executableContextAssistantItemsMenuProvider, component.getSelectionManager(),
repository.getModelAccess());
EditorContextAssistantsController controller = new EditorContextAssistantsController(
assistants, component.getSelectionManager(), component.getUpdater());
return new DefaultContextAssistantManager(component, assistants, controller, EditorSettings.getInstance());
}
private DefaultContextAssistantManager(EditorComponent editorComponent, EditorContextAssistants assistants, EditorContextAssistantsController controller,
EditorSettings editorSettings) {
myEditorComponent = editorComponent;
myAssistants = assistants;
myController = controller;
myEditorSettings = editorSettings;
}
private boolean shouldBeUpdating() {
return myAssistants.hasRegisteredAssistants() && myEditorSettings.isShowContextAssistant() && !myEditorComponent.isReadOnly();
}
private void startStopUpdating() {
boolean is = myController.isUpdating();
boolean shouldBe = shouldBeUpdating();
if (is == shouldBe) {
return;
}
if (shouldBe) {
myController.startUpdating();
} else {
myController.stopUpdating();
myAssistants.hideMenu();
}
}
@Override
public void register(ContextAssistant assistant) {
myAssistants.register(assistant);
startStopUpdating();
}
@Override
public void unregister(ContextAssistant assistant) {
myAssistants.unregister(assistant);
startStopUpdating();
}
@Override
public void updateImmediately() {
myAssistants.update();
}
@Nullable
@Override
public ContextAssistant getActiveAssistant() {
return myAssistants.getActiveAssistant();
}
@Override
public List<TransformationMenuItem> getActiveMenuItems() {
return myAssistants.getActiveMenuItems();
}
@Override
public void scheduleUpdate() {
myController.scheduleUpdate();
}
}