Add client-side left-click-air handler

build.gradle

@@ -21,7 +21,7 @@ buildscript {
 
     configurations.all {
         resolutionStrategy {
-            force 'com.google.guava:guava:21.0'
+            force 'com.google.guava:guava:20.0'
         }
     }
 

worldedit-core/build.gradle

@@ -5,7 +5,7 @@ dependencies {
     compile 'de.schlichtherle:truezip:6.8.3'
     compile 'rhino:js:1.7R2'
     compile 'org.yaml:snakeyaml:1.9'
-    compile 'com.google.guava:guava:21.0'
+    compile 'com.google.guava:guava:17.0'
     compile 'com.sk89q:jchronic:0.2.4a'
     compile 'com.google.code.findbugs:jsr305:1.3.9'
     compile 'com.thoughtworks.paranamer:paranamer:2.6'

worldedit-forge/src/main/java/com/sk89q/worldedit/forge/ForgeWorldEdit.java

@@ -28,6 +28,7 @@ import com.sk89q.worldedit.WorldVector;
 import com.sk89q.worldedit.blocks.BaseItemStack;
 import com.sk89q.worldedit.event.platform.PlatformReadyEvent;
 import com.sk89q.worldedit.extension.platform.Platform;
+import com.sk89q.worldedit.forge.net.LeftClickAirEventMessage;
 import com.sk89q.worldedit.internal.LocalWorldAdapter;
 import com.sk89q.worldedit.util.Java8Detector;
 
@@ -40,6 +41,7 @@ import net.minecraft.world.World;
 import net.minecraftforge.common.MinecraftForge;
 import net.minecraftforge.event.CommandEvent;
 import net.minecraftforge.event.entity.player.PlayerInteractEvent;
+import net.minecraftforge.event.entity.player.PlayerInteractEvent.LeftClickEmpty;
 import net.minecraftforge.fml.common.Loader;
 import net.minecraftforge.fml.common.Mod;
 import net.minecraftforge.fml.common.Mod.EventHandler;
@@ -99,6 +101,7 @@ public class ForgeWorldEdit {
     public void init(FMLInitializationEvent event) {
         MinecraftForge.EVENT_BUS.register(this);
         WECUIPacketHandler.init();
+        InternalPacketHandler.init();
         proxy.registerHandlers();
     }
 
@@ -157,6 +160,12 @@ public class ForgeWorldEdit {
         if (!platform.isHookingEvents())
             return; // We have to be told to catch these events
 
+        if (event.getWorld().isRemote && event instanceof LeftClickEmpty) {
+            // catch LCE, pass it to server
+            InternalPacketHandler.CHANNEL.sendToServer(new LeftClickAirEventMessage());
+            return;
+        }
+        
         boolean isLeftDeny = event instanceof PlayerInteractEvent.LeftClickBlock
                 && ((PlayerInteractEvent.LeftClickBlock) event)
                         .getUseItem() == Result.DENY;
@@ -172,7 +181,12 @@ public class ForgeWorldEdit {
         ForgePlayer player = wrap((EntityPlayerMP) event.getEntityPlayer());
         ForgeWorld world = getWorld(event.getEntityPlayer().world);
 
-        if (event instanceof PlayerInteractEvent.LeftClickBlock) {
+        if (event instanceof PlayerInteractEvent.LeftClickEmpty) {
+            if (we.handleArmSwing(player)) {
+                // this event cannot be canceled
+                // event.setCanceled(true);
+            }
+        } else if (event instanceof PlayerInteractEvent.LeftClickBlock) {
             @SuppressWarnings("deprecation")
             WorldVector pos = new WorldVector(LocalWorldAdapter.adapt(world),
                     event.getPos().getX(), event.getPos().getY(), event.getPos().getZ());

worldedit-forge/src/main/java/com/sk89q/worldedit/forge/InternalPacketHandler.java

@@ -0,0 +1,41 @@
+/*
+ * 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.forge;
+
+import java.nio.charset.Charset;
+
+import com.sk89q.worldedit.forge.net.LeftClickAirEventMessage;
+
+import net.minecraftforge.fml.common.network.NetworkRegistry;
+import net.minecraftforge.fml.common.network.simpleimpl.SimpleNetworkWrapper;
+import net.minecraftforge.fml.relauncher.Side;
+
+public class InternalPacketHandler {
+    public static final Charset UTF_8_CHARSET = Charset.forName("UTF-8");
+    public static SimpleNetworkWrapper CHANNEL;
+
+    public static void init() {
+         CHANNEL = NetworkRegistry.INSTANCE.newSimpleChannel(ForgeWorldEdit.MOD_ID);
+         CHANNEL.registerMessage(LeftClickAirEventMessage.Handler.class, LeftClickAirEventMessage.class, 0, Side.SERVER);
+    }
+
+    private InternalPacketHandler() {
+    }
+}

worldedit-forge/src/main/java/com/sk89q/worldedit/forge/net/LeftClickAirEventMessage.java

@@ -0,0 +1,56 @@
+/*
+ * 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.forge.net;
+
+import com.sk89q.worldedit.forge.ForgeWorldEdit;
+
+import io.netty.buffer.ByteBuf;
+import net.minecraftforge.event.entity.player.PlayerInteractEvent;
+import net.minecraftforge.fml.common.network.simpleimpl.IMessage;
+import net.minecraftforge.fml.common.network.simpleimpl.IMessageHandler;
+import net.minecraftforge.fml.common.network.simpleimpl.MessageContext;
+
+public class LeftClickAirEventMessage implements IMessage {
+
+    public static final class Handler implements IMessageHandler<LeftClickAirEventMessage, IMessage> {
+
+        @Override
+        public IMessage onMessage(LeftClickAirEventMessage message, final MessageContext ctx) {
+            ctx.getServerHandler().player.mcServer.addScheduledTask(new Runnable() {
+
+                @Override
+                public void run() {
+                    ForgeWorldEdit.inst.onPlayerInteract(new PlayerInteractEvent.LeftClickEmpty(ctx.getServerHandler().player));
+                }
+            });
+            return null;
+        }
+
+    }
+
+    @Override
+    public void fromBytes(ByteBuf buf) {
+    }
+
+    @Override
+    public void toBytes(ByteBuf buf) {
+    }
+
+}