WorldEditSelectionProvider.java

/*
 * This file is part of NucleusFramework for Bukkit, licensed under the MIT License (MIT).
 *
 * Copyright (c) JCThePants (www.jcwhatever.com)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.jcwhatever.nucleus.internal.providers.selection;

import com.jcwhatever.nucleus.internal.providers.InternalProviderInfo;
import com.jcwhatever.nucleus.providers.regionselect.IRegionSelectProvider;
import com.jcwhatever.nucleus.providers.Provider;
import com.jcwhatever.nucleus.providers.regionselect.IRegionSelection;
import com.jcwhatever.nucleus.regions.SimpleRegionSelection;
import com.jcwhatever.nucleus.utils.PreCon;
import com.sk89q.worldedit.Vector;
import com.sk89q.worldedit.bukkit.WorldEditPlugin;
import com.sk89q.worldedit.bukkit.selections.Selection;
import com.sk89q.worldedit.regions.RegionSelector;

import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.entity.Player;
import org.bukkit.plugin.Plugin;

import javax.annotation.Nullable;

/**
 * WorldEdit region selection provider
 */
public final class WorldEditSelectionProvider extends Provider implements IRegionSelectProvider {

    public static final String NAME = "WorldEdit";

    private static Boolean _isWorldEditInstalled = null;
    private static Plugin _wePlugin;

    public static boolean isWorldEditInstalled() {
        if (_isWorldEditInstalled == null) {

            // Check that World Edit is installed
            _isWorldEditInstalled = (_wePlugin = Bukkit.getPluginManager().getPlugin("WorldEdit")) != null;
        }

        return _isWorldEditInstalled;
    }

    private final Object _sync = new Object();

    public WorldEditSelectionProvider() {
        setInfo(new InternalProviderInfo(this.getClass(),
                NAME, "WorldEdit region selection provider."));
    }

    @Override
    public IRegionSelection getSelection(Player player) {
        PreCon.notNull(player);

        // Check that World Edit is installed
        if (!isWorldEditInstalled()) {
            return null;
        }

        WorldEditPlugin plugin = (WorldEditPlugin)_wePlugin;
        Selection sel;

        synchronized (_sync) {

            // Check for World Edit selection
            if ((sel = plugin.getSelection(player)) == null) {
                return null;
            }

            // Make sure both points are selected
            if (sel.getMaximumPoint() == null || sel.getMinimumPoint() == null) {
                return null;
            }

            if (!sel.getMaximumPoint().getWorld().equals(sel.getMinimumPoint().getWorld())) {
                return null;
            }

            return new SimpleRegionSelection(sel.getMinimumPoint(), sel.getMaximumPoint());
        }
    }

    @Override
    public boolean setSelection(Player player, IRegionSelection selection) {
        PreCon.notNull(player);
        PreCon.notNull(selection);

        if (!selection.isDefined())
            return false;

        // Check that World Edit is installed
        if (!isWorldEditInstalled())
            return false;

        Location p1 = selection.getP1();
        Location p2 = selection.getP2();

        assert p1 != null;
        assert p2 != null;

        if (!p1.getWorld().equals(p2.getWorld())) {
            return false;
        }

        synchronized (_sync) {

            WorldEditPlugin plugin = (WorldEditPlugin) _wePlugin;
            RegionSelector selector = plugin.getSession(player).getRegionSelector(plugin.wrapPlayer(player).getWorld());

            Vector p1Vector = new Vector(p1.toVector().getX(), p1.toVector().getY(), p1.toVector().getZ());
            Vector p2Vector = new Vector(p2.toVector().getX(), p2.toVector().getY(), p2.toVector().getZ());

            selector.selectPrimary(p1Vector);
            selector.selectSecondary(p2Vector);

            return true;
        }
    }

    @Nullable
    private static WorldEditPlugin getWorldEdit() {
        if (!isWorldEditInstalled())
            return null;

        return (WorldEditPlugin)_wePlugin;
    }
}