org.syncany.gui.tray.RecentFileChanges.java Source code

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Here is the source code for org.syncany.gui.tray.RecentFileChanges.java

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/*
 * Syncany, www.syncany.org
 * Copyright (C) 2011-2015 Philipp C. Heckel <philipp.heckel@gmail.com> 
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.syncany.gui.tray;

import java.io.File;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.atomic.AtomicBoolean;

import org.syncany.util.LimitedSortedSet;
import org.syncany.operations.ChangeSet;
import org.syncany.operations.log.LightweightDatabaseVersion;

import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;

/**
 * @author Philipp C. Heckel <philipp.heckel@gmail.com>
 */
public class RecentFileChanges {
    public static final int RECENT_CHANGES_COUNT = 15;

    private TrayIcon trayIcon;

    private Timer recentFileChangesUpdateTimer;
    private AtomicBoolean recentFileChangesUpdated;
    private LimitedSortedSet<RecentFileEntry> recentFileChanges;

    public RecentFileChanges(TrayIcon trayIcon) {
        this.trayIcon = trayIcon;

        this.recentFileChangesUpdateTimer = new Timer();
        this.recentFileChangesUpdated = new AtomicBoolean(false);
        this.recentFileChanges = new LimitedSortedSet<>(RECENT_CHANGES_COUNT);

        initTimer();
    }

    private void initTimer() {
        recentFileChangesUpdateTimer.schedule(new TimerTask() {
            @Override
            public void run() {
                if (recentFileChangesUpdated.get()) {
                    trayIcon.setRecentChanges(getRecentFiles());
                    recentFileChangesUpdated.set(false);
                }
            }
        }, 6000, 3000);
    }

    public void updateRecentFiles(String root, List<LightweightDatabaseVersion> databaseVersions) {
        for (LightweightDatabaseVersion databaseVersion : databaseVersions) {
            updateRecentFiles(root, databaseVersion.getDate(), databaseVersion.getChangeSet());
        }
    }

    public void updateRecentFiles(String root, Date date, ChangeSet changeSet) {
        // Update recent file entries (list only)
        for (String newFile : changeSet.getNewFiles()) {
            replaceEntry(new RecentFileEntry(new File(root, newFile), date));
        }

        for (String changedFile : changeSet.getChangedFiles()) {
            replaceEntry(new RecentFileEntry(new File(root, changedFile), date));
        }

        // Trigger update thread
        if (changeSet.getNewFiles().size() > 0 || changeSet.getChangedFiles().size() > 0) {
            recentFileChangesUpdated.set(true);
        }
    }

    private synchronized void replaceEntry(final RecentFileEntry recentFileEntry) {
        // Remove old entry
        Iterables.removeIf(recentFileChanges, new Predicate<RecentFileEntry>() {
            @Override
            public boolean apply(RecentFileEntry aRecentFileEntry) {
                return aRecentFileEntry.file.equals(recentFileEntry.file);
            }
        });

        // Add new entry
        recentFileChanges.add(recentFileEntry);
    }

    public synchronized List<File> getRecentFiles() {
        List<File> recentChanges = Lists.newArrayList();
        Iterator<RecentFileEntry> recentChangeEntryIterator = recentFileChanges.iterator();

        while (recentChangeEntryIterator.hasNext()) {
            recentChanges.add(recentChangeEntryIterator.next().file);
        }

        return recentChanges;
    }

    public synchronized void clear() {
        recentFileChanges.clear();
    }

    public synchronized int size() {
        return recentFileChanges.size();
    }

    private static class RecentFileEntry implements Comparable<RecentFileEntry> {
        private File file;
        private Date date;

        public RecentFileEntry(File file, Date date) {
            this.file = file;
            this.date = date;
        }

        @Override
        public int compareTo(RecentFileEntry other) {
            int dateCompare = other.date.compareTo(date);

            if (dateCompare == 0) {
                return other.file.compareTo(file);
            } else {
                return dateCompare;
            }
        }
    }
}