/*
 * Copyright 2003-2011 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.plugin;

import com.intellij.openapi.actionSystem.AnAction;
import com.intellij.openapi.actionSystem.AnActionEvent;
import com.intellij.openapi.actionSystem.DataKeys;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiClass;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiMethod;

public class FindMethodUsagesInMPS extends AnAction {
  public void update(AnActionEvent anActionEvent) {
    super.update(anActionEvent);
    PsiElement element = PluginUtil.getCurrentElement(anActionEvent);
    PsiMethod method = PluginUtil.getElement(element, PsiMethod.class);
    if (method == null) {
      anActionEvent.getPresentation().setVisible(false);
      anActionEvent.getPresentation().setEnabled(false);
    } else {
      anActionEvent.getPresentation().setVisible(true);
      anActionEvent.getPresentation().setEnabled(true);
    }
  }

  public void actionPerformed(AnActionEvent anActionEvent) {
    PsiElement element = PluginUtil.getCurrentElement(anActionEvent);
    PsiMethod method = PluginUtil.getElement(element, PsiMethod.class);
    PsiClass cls = PluginUtil.getElement(element, PsiClass.class);
    Project project = anActionEvent.getData(DataKeys.PROJECT);
    if (project == null) return;
    ProjectHandler projectHandler = project.getComponent(ProjectHandler.class);
    projectHandler.showMethodUsages(cls.getQualifiedName(), method.getName(), method.getParameterList().getParameters().length);
  }
}
