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Added ExtentBuffer to buffer changes to Extents.
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171
src/main/java/com/sk89q/worldedit/extent/ExtentBuffer.java
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171
src/main/java/com/sk89q/worldedit/extent/ExtentBuffer.java
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/*
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* WorldEdit, a Minecraft world manipulation toolkit
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* Copyright (C) sk89q <http://www.sk89q.com>
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* Copyright (C) WorldEdit team and contributors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.sk89q.worldedit.extent;
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import com.sk89q.worldedit.BlockVector;
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import com.sk89q.worldedit.Extent;
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import com.sk89q.worldedit.Vector;
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import com.sk89q.worldedit.WorldEditException;
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import com.sk89q.worldedit.blocks.BaseBlock;
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import com.sk89q.worldedit.blocks.BlockID;
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import com.sk89q.worldedit.function.mask.Mask;
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import com.sk89q.worldedit.function.mask.Masks;
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import com.sk89q.worldedit.patterns.Pattern;
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import com.sk89q.worldedit.regions.AbstractRegion;
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import com.sk89q.worldedit.regions.Region;
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import com.sk89q.worldedit.regions.RegionOperationException;
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import java.util.Iterator;
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import java.util.LinkedHashMap;
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import java.util.Map;
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import static com.google.common.base.Preconditions.checkNotNull;
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/**
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* Buffers changes to an {@link Extent} and allows later retrieval of buffered
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* changes for actual setting.
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*/
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public class ExtentBuffer implements Extent, Pattern {
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private static final BaseBlock AIR = new BaseBlock(BlockID.AIR);
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private final Extent delegate;
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private final Map<BlockVector, BaseBlock> buffer = new LinkedHashMap<BlockVector, BaseBlock>();
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private final Mask mask;
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private Vector min = null;
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private Vector max = null;
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/**
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* Create a new extent buffer that will buffer every change.
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*
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* @param delegate the delegate extent for {@link Extent#getBlock(Vector)}, etc. calls
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*/
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public ExtentBuffer(Extent delegate) {
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this(delegate, Masks.alwaysTrue());
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}
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/**
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* Create a new extent buffer that will buffer changes that meet the criteria
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* of the given mask.
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*
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* @param delegate the delegate extent for {@link Extent#getBlock(Vector)}, etc. calls
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* @param mask the mask
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*/
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public ExtentBuffer(Extent delegate, Mask mask) {
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checkNotNull(delegate);
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checkNotNull(mask);
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this.delegate = delegate;
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this.mask = mask;
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}
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@Override
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public BaseBlock getBlock(Vector location) {
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return delegate.getBlock(location);
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}
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@Override
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public int getBlockType(Vector location) {
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return delegate.getBlockType(location);
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}
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@Override
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public int getBlockData(Vector location) {
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return delegate.getBlockData(location);
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}
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@Override
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public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent) throws WorldEditException {
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// Update minimum
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if (min == null) {
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min = location;
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} else {
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min = Vector.getMinimum(min, location);
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}
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// Update maximum
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if (max == null) {
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max = location;
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} else {
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max = Vector.getMaximum(max, location);
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}
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BlockVector blockVector = location.toBlockVector();
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if (mask.test(blockVector)) {
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buffer.put(blockVector, block);
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return true;
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} else {
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return delegate.setBlock(location, block, notifyAdjacent);
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}
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}
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@Override
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public BaseBlock next(Vector pos) {
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BaseBlock block = buffer.get(pos.toBlockVector());
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if (block != null) {
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return block;
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} else {
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return AIR;
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}
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}
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@Override
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public BaseBlock next(int x, int y, int z) {
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return next(new Vector(x, y, z));
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}
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/**
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* Return a region representation of this buffer.
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*
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* @return a region
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*/
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public Region asRegion() {
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return new AbstractRegion(null) {
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@Override
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public Vector getMinimumPoint() {
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return min != null ? min : new Vector();
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}
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@Override
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public Vector getMaximumPoint() {
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return max != null ? max : new Vector();
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}
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@Override
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public void expand(Vector... changes) throws RegionOperationException {
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throw new UnsupportedOperationException("Cannot change the size of this region");
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}
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@Override
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public void contract(Vector... changes) throws RegionOperationException {
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throw new UnsupportedOperationException("Cannot change the size of this region");
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}
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@Override
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public boolean contains(Vector pt) {
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return buffer.containsKey(pt.toBlockVector());
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}
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@Override
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public Iterator<BlockVector> iterator() {
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return buffer.keySet().iterator();
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}
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};
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}
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}
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