Handler for custom block highlight.

forge/forge_client/src/net/minecraft/src/forge/ForgeHooksClient.java

@@ -9,11 +9,29 @@ import net.minecraft.src.Block;
 import net.minecraft.src.ModLoader;
 import net.minecraft.src.RenderBlocks;
 import net.minecraft.src.Tessellator;
+import net.minecraft.src.RenderGlobal;
+import net.minecraft.src.EntityPlayer;
+import net.minecraft.src.MovingObjectPosition;
+import net.minecraft.src.ItemStack;
 import org.lwjgl.opengl.GL11;
 
 import java.util.*;
 
 public class ForgeHooksClient {
+
+	public static boolean onBlockHighlight(RenderGlobal renderglobal,
+		    EntityPlayer player, MovingObjectPosition mop, int i,
+		    ItemStack itemstack, float f) {
+		for (IHighlightHandler handler : highlightHandlers) {
+			if(handler.onBlockHighlight(renderglobal,player,mop,
+					i,itemstack,f))
+				return true;
+		}
+		return false;
+	}
+
+	static LinkedList<IHighlightHandler> highlightHandlers = new LinkedList<IHighlightHandler>();
+
 	public static boolean canRenderInPass(Block block, int pass) {
 		if(block instanceof IMultipassRender) {
 			IMultipassRender impr = (IMultipassRender) block;
@@ -23,7 +41,6 @@ public class ForgeHooksClient {
 		return false;
 	}
 
-
 	static HashMap tessellators=new HashMap();
 	static HashMap textures=new HashMap();
 	static boolean inWorld=false;

forge/forge_client/src/net/minecraft/src/forge/IHighlightHandler.java

@@ -0,0 +1,23 @@
+/*
+ * This software is provided under the terms of the Minecraft Forge Public 
+ * License v1.0.
+ */
+package net.minecraft.src.forge;
+
+import net.minecraft.src.EntityPlayer;
+import net.minecraft.src.EnumStatus;
+import net.minecraft.src.RenderGlobal;
+import net.minecraft.src.EntityPlayer;
+import net.minecraft.src.MovingObjectPosition;
+import net.minecraft.src.ItemStack;
+
+public interface IHighlightHandler {
+    /**
+     * Allow custom handling of highlights.  Return true if the hilight has
+     * been handled.
+     */
+    public boolean onBlockHighlight(RenderGlobal renderglobal,
+		    EntityPlayer player, MovingObjectPosition mop, int i,
+		    ItemStack itemstack, float f);
+}
+

forge/forge_client/src/net/minecraft/src/forge/MinecraftForgeClient.java

@@ -12,6 +12,13 @@ import net.minecraft.src.Tessellator;
 import org.lwjgl.opengl.GL11;
 
 public class MinecraftForgeClient {
+	/**
+	 * Registers a new block highlight handler.
+	 */
+	public static void registerHighlightHandler(IHighlightHandler handler) {
+		ForgeHooksClient.highlightHandlers.add(handler);
+	}
+
 	/** Bind a texture.  This is used to bind a texture file when
 	 * performing your own rendering, rather than using ITextureProvider.
 	 *

forge/minecraft.patch

@@ -1044,6 +1044,43 @@ diff -u -r --strip-trailing-cr ../src_base/minecraft/net/minecraft/src/EntityPla
          if(!worldObj.multiplayerWorld)
          {
              if(isPlayerSleeping() || !isEntityAlive())
+diff -u -r --strip-trailing-cr ../src_base/minecraft/net/minecraft/src/EntityRenderer.java ../src_work/minecraft/net/minecraft/src/EntityRenderer.java
+--- ../src_base/minecraft/net/minecraft/src/EntityRenderer.java	2011-08-11 17:02:11.000000000 -0400
++++ ../src_work/minecraft/net/minecraft/src/EntityRenderer.java	2011-08-20 06:25:56.000000000 -0400
+@@ -3,6 +3,7 @@
+ // Decompiler options: packimports(3) braces deadcode 
+ 
+ package net.minecraft.src;
++import net.minecraft.src.forge.ForgeHooksClient;
+ 
+ import java.nio.FloatBuffer;
+ import java.util.List;
+@@ -573,8 +574,12 @@
+             {
+                 EntityPlayer entityplayer = (EntityPlayer)entityliving;
+                 GL11.glDisable(3008 /*GL_ALPHA_TEST*/);
++		if(!ForgeHooksClient.onBlockHighlight(renderglobal,entityplayer,
++			mc.objectMouseOver,0,
++			entityplayer.inventory.getCurrentItem(),f)) {
+                 renderglobal.drawBlockBreaking(entityplayer, mc.objectMouseOver, 0, entityplayer.inventory.getCurrentItem(), f);
+                 renderglobal.drawSelectionBox(entityplayer, mc.objectMouseOver, 0, entityplayer.inventory.getCurrentItem(), f);
++		}
+                 GL11.glEnable(3008 /*GL_ALPHA_TEST*/);
+             }
+             GL11.glBlendFunc(770, 771);
+@@ -619,8 +624,12 @@
+             {
+                 EntityPlayer entityplayer1 = (EntityPlayer)entityliving;
+                 GL11.glDisable(3008 /*GL_ALPHA_TEST*/);
++		if(!ForgeHooksClient.onBlockHighlight(renderglobal,entityplayer1,
++			mc.objectMouseOver,0,
++			entityplayer1.inventory.getCurrentItem(),f)) {
+                 renderglobal.drawBlockBreaking(entityplayer1, mc.objectMouseOver, 0, entityplayer1.inventory.getCurrentItem(), f);
+                 renderglobal.drawSelectionBox(entityplayer1, mc.objectMouseOver, 0, entityplayer1.inventory.getCurrentItem(), f);
++		}
+                 GL11.glEnable(3008 /*GL_ALPHA_TEST*/);
+             }
+             renderRainSnow(f);
 diff -u -r --strip-trailing-cr ../src_base/minecraft/net/minecraft/src/Explosion.java ../src_work/minecraft/net/minecraft/src/Explosion.java
 --- ../src_base/minecraft/net/minecraft/src/Explosion.java	2011-08-11 17:02:11.000000000 -0400
 +++ ../src_work/minecraft/net/minecraft/src/Explosion.java	2011-08-11 17:02:12.000000000 -0400