Add a #match mask, to mask to blocks that match the clipboard

worldedit-core/src/main/java/com/sk89q/worldedit/extension/factory/MaskFactory.java

@@ -29,6 +29,7 @@
 import com.sk89q.worldedit.extension.factory.parser.mask.ExposedMaskParser;
 import com.sk89q.worldedit.extension.factory.parser.mask.ExpressionMaskParser;
 import com.sk89q.worldedit.extension.factory.parser.mask.LazyRegionMaskParser;
+import com.sk89q.worldedit.extension.factory.parser.mask.MatchMaskParser;
 import com.sk89q.worldedit.extension.factory.parser.mask.NegateMaskParser;
 import com.sk89q.worldedit.extension.factory.parser.mask.NoiseMaskParser;
 import com.sk89q.worldedit.extension.factory.parser.mask.OffsetMaskParser;
@@ -65,6 +66,7 @@ public final class MaskFactory extends AbstractFactory<Mask> {
     public MaskFactory(WorldEdit worldEdit) {
         super(worldEdit, new BlocksMaskParser(worldEdit));
 
+        register(new MatchMaskParser(worldEdit));
         register(new ExistingMaskParser(worldEdit));
         register(new AirMaskParser(worldEdit));
         register(new ExposedMaskParser(worldEdit));

worldedit-core/src/main/java/com/sk89q/worldedit/extension/factory/parser/mask/MatchMaskParser.java

@@ -0,0 +1,55 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.extension.factory.parser.mask;
+
+import com.google.common.collect.ImmutableList;
+import com.sk89q.worldedit.EmptyClipboardException;
+import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.extension.input.InputParseException;
+import com.sk89q.worldedit.extension.input.ParserContext;
+import com.sk89q.worldedit.function.mask.Mask;
+import com.sk89q.worldedit.function.mask.MatchMask;
+import com.sk89q.worldedit.internal.registry.SimpleInputParser;
+import com.sk89q.worldedit.util.formatting.text.TranslatableComponent;
+
+import java.util.List;
+
+public class MatchMaskParser extends SimpleInputParser<Mask> {
+
+    private final List<String> aliases = ImmutableList.of("#match");
+
+    public MatchMaskParser(WorldEdit worldEdit) {
+        super(worldEdit);
+    }
+
+    @Override
+    public List<String> getMatchedAliases() {
+        return aliases;
+    }
+
+    @Override
+    public Mask parseFromSimpleInput(String input, ParserContext context) throws InputParseException {
+        try {
+            return new MatchMask(context.requireExtent(), context.requireSession().getClipboard().getClipboard());
+        } catch (EmptyClipboardException e) {
+            throw new InputParseException(TranslatableComponent.of("worldedit.error.empty-clipboard"));
+        }
+    }
+}

worldedit-core/src/main/java/com/sk89q/worldedit/function/mask/MatchMask.java

@@ -0,0 +1,45 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.function.mask;
+
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.math.BlockVector3;
+
+public class MatchMask extends AbstractMask {
+
+    private final Extent extent;
+    private final Extent matchExtent;
+    private final BlockVector3 offset;
+
+    public MatchMask(Extent extent, Extent matchExtent) {
+        this(extent, matchExtent, BlockVector3.ZERO);
+    }
+
+    public MatchMask(Extent extent, Extent matchExtent, BlockVector3 offset) {
+        this.extent = extent;
+        this.matchExtent = matchExtent;
+        this.offset = offset;
+    }
+
+    @Override
+    public boolean test(BlockVector3 vector) {
+        return extent.getBlock(vector).equals(matchExtent.getBlock(vector.add(offset)));
+    }
+}