com.intellij.internal.focus.FocusTracesAction.java Source code

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Here is the source code for com.intellij.internal.focus.FocusTracesAction.java

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/*
 * Copyright 2000-2011 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 com.intellij.internal.focus;

import com.intellij.openapi.actionSystem.*;
import com.intellij.openapi.project.DumbAware;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.wm.IdeFocusManager;
import com.intellij.openapi.wm.impl.FocusManagerImpl;
import com.intellij.openapi.wm.impl.FocusRequestInfo;

import java.awt.*;
import java.awt.event.AWTEventListener;
import java.awt.event.FocusEvent;
import java.util.ArrayList;
import java.util.List;

/**
 * @author Konstantin Bulenkov
 */
public class FocusTracesAction extends AnAction implements DumbAware {
    private static boolean myActive = false;
    private AWTEventListener myFocusTracker;

    public static boolean isActive() {
        return myActive;
    }

    @Override
    public void actionPerformed(AnActionEvent e) {
        final Project project = e.getData(CommonDataKeys.PROJECT);
        final IdeFocusManager manager = IdeFocusManager.getGlobalInstance();
        if (!(manager instanceof FocusManagerImpl))
            return;
        final FocusManagerImpl focusManager = (FocusManagerImpl) manager;

        myActive = !myActive;
        if (myActive) {
            myFocusTracker = new AWTEventListener() {
                @Override
                public void eventDispatched(AWTEvent event) {
                    if (event instanceof FocusEvent && event.getID() == FocusEvent.FOCUS_GAINED) {
                        focusManager.getRequests().add(
                                new FocusRequestInfo(((FocusEvent) event).getComponent(), new Throwable(), false));
                    }
                }
            };
            Toolkit.getDefaultToolkit().addAWTEventListener(myFocusTracker, AWTEvent.FOCUS_EVENT_MASK);
        }

        if (!myActive) {
            final List<FocusRequestInfo> requests = focusManager.getRequests();
            new FocusTracesDialog(project, new ArrayList<FocusRequestInfo>(requests)).show();
            Toolkit.getDefaultToolkit().removeAWTEventListener(myFocusTracker);
            myFocusTracker = null;
            requests.clear();
        }
    }

    @Override
    public void update(AnActionEvent e) {
        final Presentation presentation = e.getPresentation();
        if (myActive) {
            presentation.setText("Stop Focus Tracing");
        } else {
            presentation.setText("Start Focus Tracing");
        }
        presentation.setEnabled(e.getData(CommonDataKeys.PROJECT) != null);
    }
}