Added new preliminary non-destructive //rotate and //flip implementations.

Blocks themselves are not yet rotated/flip.

//flip now only flips across the player. -p was removed.

src/main/java/com/sk89q/worldedit/session/ClipboardHolder.java

@@ -0,0 +1,77 @@
+/*
+ * 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 Lesser 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 Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.session;
+
+import com.sk89q.worldedit.extent.clipboard.Clipboard;
+import com.sk89q.worldedit.math.transform.Identity;
+import com.sk89q.worldedit.math.transform.Transform;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Holds the clipboard and the current transform on the clipboard.
+ */
+public class ClipboardHolder {
+
+    private final Clipboard clipboard;
+    private Transform transform = new Identity();
+
+    /**
+     * Create a new instance with the given clipboard.
+     *
+     * @param clipboard the clipboard
+     */
+    public ClipboardHolder(Clipboard clipboard) {
+        checkNotNull(clipboard);
+        this.clipboard = clipboard;
+    }
+
+    /**
+     * Get the clipboard.
+     * <p>
+     * If there is a transformation applied, the returned clipboard will
+     * not contain its effect.
+     *
+     * @return the clipboard
+     */
+    public Clipboard getClipboard() {
+        return clipboard;
+    }
+
+    /**
+     * Set the transform.
+     *
+     * @param transform the transform
+     */
+    public void setTransform(Transform transform) {
+        checkNotNull(transform);
+        this.transform = transform;
+    }
+
+    /**
+     * Get the transform.
+     *
+     * @return the transform
+     */
+    public Transform getTransform() {
+        return transform;
+    }
+
+}