TestRoots/watchdog

package nl.tudelft.watchdog.eclipse.logic.ui.listeners;

import nl.tudelft.watchdog.core.logic.ui.events.WatchDogEventType;
import nl.tudelft.watchdog.eclipse.ui.WatchDogView;

import org.eclipse.ui.IPartListener2;
import org.eclipse.ui.IWorkbenchPartReference;

/**
 * Listener for {@link WatchDogView}. Catches when the view is actually visible
 * by the user and not hidden by other parts.
 **/
public class WatchDogViewListener implements IPartListener2 {

    private WatchDogView watchDogView;

    public WatchDogViewListener(WatchDogView watchDogView) {
        this.watchDogView = watchDogView;
    }

    @Override
    public void partActivated(IWorkbenchPartReference partRef) {
        // intentionally empty
    }

    @Override
    public void partBroughtToTop(IWorkbenchPartReference partRef) {
        // intentionally empty
    }

    @Override
    public void partClosed(IWorkbenchPartReference partRef) {
        // intentionally empty
    }

    @Override
    public void partDeactivated(IWorkbenchPartReference partRef) {
        // intentionally empty
    }

    @Override
    public void partOpened(IWorkbenchPartReference partRef) {
        // intentionally empty
    }

    @Override
    public void partHidden(IWorkbenchPartReference partRef) {
        triggerEventManager();
    }

    @Override
    public void partVisible(IWorkbenchPartReference partRef) {
        triggerEventManager();
    }

    @Override
    public void partInputChanged(IWorkbenchPartReference partRef) {
        // intentionally empty
    }

    private void triggerEventManager() {
        if (isVisible()) {
            WatchDogEventType.START_WATCHDOGVIEW.process(this);
        } else {
            WatchDogEventType.END_WATCHDOGVIEW.process(this);

        }
    }

    private boolean isVisible() {
        return watchDogView.getSite().getPage().isPartVisible(watchDogView);
    }

}