| /* |
| * Copyright 2000-2014 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.openapi.actionSystem; |
| |
| import com.intellij.openapi.project.DumbAware; |
| import com.intellij.openapi.util.ModificationTracker; |
| import com.intellij.psi.util.CachedValue; |
| import com.intellij.psi.util.CachedValueProvider; |
| import com.intellij.util.CachedValueImpl; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| public abstract class ComputableActionGroup extends ActionGroup implements DumbAware { |
| private CachedValue<AnAction[]> myChildren; |
| |
| protected ComputableActionGroup() { |
| } |
| |
| protected ComputableActionGroup(boolean popup) { |
| super(null, popup); |
| } |
| |
| @Override |
| public boolean hideIfNoVisibleChildren() { |
| return true; |
| } |
| |
| @Override |
| @NotNull |
| public final AnAction[] getChildren(@Nullable AnActionEvent e) { |
| if (e == null) { |
| return EMPTY_ARRAY; |
| } |
| |
| if (myChildren == null) { |
| myChildren = new CachedValueImpl<AnAction[]>(createChildrenProvider(e.getActionManager())); |
| } |
| return myChildren.getValue(); |
| } |
| |
| @NotNull |
| protected abstract CachedValueProvider<AnAction[]> createChildrenProvider(@NotNull ActionManager actionManager); |
| |
| public abstract static class Simple extends ComputableActionGroup { |
| protected Simple() { |
| } |
| |
| protected Simple(boolean popup) { |
| super(popup); |
| } |
| |
| @NotNull |
| @Override |
| protected final CachedValueProvider<AnAction[]> createChildrenProvider(@NotNull final ActionManager actionManager) { |
| return new CachedValueProvider<AnAction[]>() { |
| @Nullable |
| @Override |
| public Result<AnAction[]> compute() { |
| return Result.create(computeChildren(actionManager), ModificationTracker.NEVER_CHANGED); |
| } |
| }; |
| } |
| |
| @NotNull |
| protected abstract AnAction[] computeChildren(@NotNull ActionManager manager); |
| } |
| } |