Restored tab completion of player names.

Fixes WORLDEDIT-3144.

src/main/java/com/sk89q/worldedit/internal/command/UserCommandCompleter.java

@@ -0,0 +1,72 @@
+/*
+ * 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.internal.command;
+
+import com.sk89q.minecraft.util.commands.CommandException;
+import com.sk89q.minecraft.util.commands.CommandLocals;
+import com.sk89q.worldedit.extension.platform.Actor;
+import com.sk89q.worldedit.extension.platform.Capability;
+import com.sk89q.worldedit.extension.platform.MultiUserPlatform;
+import com.sk89q.worldedit.extension.platform.Platform;
+import com.sk89q.worldedit.extension.platform.PlatformManager;
+import com.sk89q.worldedit.util.command.CommandCompleter;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Provides the names of connected users as suggestions.
+ */
+public class UserCommandCompleter implements CommandCompleter {
+
+    private final PlatformManager platformManager;
+
+    /**
+     * Create a new instance.
+     *
+     * @param platformManager the platform manager
+     */
+    public UserCommandCompleter(PlatformManager platformManager) {
+        checkNotNull(platformManager);
+        this.platformManager = platformManager;
+    }
+
+    @Override
+    public List<String> getSuggestions(String arguments, CommandLocals locals) throws CommandException {
+        Platform platform = platformManager.queryCapability(Capability.USER_COMMANDS);
+        if (platform instanceof MultiUserPlatform) {
+            List<String> suggestions = new ArrayList<String>();
+            Collection<Actor> users = ((MultiUserPlatform) platform).getConnectedUsers();
+            for (Actor user : users) {
+                if (user.getName().toLowerCase().startsWith(arguments.toLowerCase().trim())) {
+                    suggestions.add(user.getName());
+                }
+            }
+            return suggestions;
+        } else {
+            return Collections.emptyList();
+        }
+    }
+
+}