platform/lang-impl/src/com/intellij/find/impl/ShowRecentFindUsagesAction.java

/*
 * 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.find.impl;

import com.intellij.find.FindBundle;
import com.intellij.find.FindManager;
import com.intellij.find.findUsages.FindUsagesManager;
import com.intellij.navigation.ItemPresentation;
import com.intellij.openapi.actionSystem.AnAction;
import com.intellij.openapi.actionSystem.AnActionEvent;
import com.intellij.openapi.actionSystem.CommonDataKeys;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.ui.popup.JBPopupFactory;
import com.intellij.openapi.ui.popup.PopupStep;
import com.intellij.openapi.ui.popup.util.BaseListPopupStep;
import com.intellij.ui.awt.RelativePoint;
import com.intellij.usages.ConfigurableUsageTarget;
import com.intellij.usages.UsageView;
import org.jetbrains.annotations.NotNull;

import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/**
 * @author cdr
 */
public class ShowRecentFindUsagesAction extends AnAction {
  @Override
  public void update(final AnActionEvent e) {
    UsageView usageView = e.getData(UsageView.USAGE_VIEW_KEY);
    Project project = e.getData(CommonDataKeys.PROJECT);
    e.getPresentation().setEnabled(usageView != null && project != null);
  }

  @Override
  public void actionPerformed(AnActionEvent e) {
    UsageView usageView = e.getData(UsageView.USAGE_VIEW_KEY);
    Project project = e.getData(CommonDataKeys.PROJECT);
    final FindUsagesManager findUsagesManager = ((FindManagerImpl)FindManager.getInstance(project)).getFindUsagesManager();
    List<ConfigurableUsageTarget> history = new ArrayList<ConfigurableUsageTarget>(findUsagesManager.getHistory().getAll());

    if (!history.isEmpty()) {
      // skip most recent find usage, it's under your nose
      history.remove(history.size() - 1);
      Collections.reverse(history);
    }
    if (history.isEmpty()) {
      history.add(null); // to fill the popup
    }

    BaseListPopupStep<ConfigurableUsageTarget> step =
      new BaseListPopupStep<ConfigurableUsageTarget>(FindBundle.message("recent.find.usages.action.title"), history) {
        @Override
        public Icon getIconFor(final ConfigurableUsageTarget data) {
          ItemPresentation presentation = data == null ? null : data.getPresentation();
          return presentation == null ? null : presentation.getIcon(false);
        }

        @Override
        @NotNull
        public String getTextFor(final ConfigurableUsageTarget data) {
          if (data == null) {
            return FindBundle.message("recent.find.usages.action.nothing");
          }
          return data.getLongDescriptiveName();
        }

        @Override
        public PopupStep onChosen(final ConfigurableUsageTarget selectedValue, final boolean finalChoice) {
          return doFinalStep(new Runnable() {
            @Override
            public void run() {
              if (selectedValue != null) {
                findUsagesManager.rerunAndRecallFromHistory(selectedValue);
              }
            }
          });
        }
      };
    RelativePoint point;
    if (e.getInputEvent() instanceof MouseEvent) {
      point = new RelativePoint((MouseEvent) e.getInputEvent());
    }
    else {
      point = new RelativePoint(usageView.getComponent(), new Point(4, 4));
    }
    JBPopupFactory.getInstance().createListPopup(step).show(point);
  }
}