Initial commit (Forge 1291).

src/main/java/org/spigotmc/TrackingRange.java

@@ -0,0 +1,51 @@
+package org.spigotmc;
+
+import net.minecraft.entity.Entity;
+import net.minecraft.entity.item.EntityXPOrb;
+import net.minecraft.entity.monster.EntityGhast;
+import net.minecraft.entity.item.EntityItem;
+import net.minecraft.entity.item.EntityItemFrame;
+import net.minecraft.entity.item.EntityPainting;
+import net.minecraft.entity.player.EntityPlayerMP;;
+
+public class TrackingRange
+{
+
+    /**
+     * Gets the range an entity should be 'tracked' by players and visible in
+     * the client.
+     *
+     * @param entity
+     * @param defaultRange Default range defined by Mojang
+     * @return
+     */
+    public static int getEntityTrackingRange(Entity entity, int defaultRange)
+    {
+        SpigotWorldConfig config = entity.worldObj.getSpigotConfig(); // Cauldron
+        int range = defaultRange;
+        if ( entity instanceof EntityPlayerMP )
+        {
+            range = config.playerTrackingRange;
+        } else if ( entity.defaultActivationState || entity instanceof EntityGhast )
+        {
+            range = defaultRange;
+        } else if ( entity.activationType == 1 )
+        {
+            range = config.monsterTrackingRange;
+        } else if ( entity.activationType == 2 )
+        {
+            range = config.animalTrackingRange;
+        } else if ( entity instanceof EntityItemFrame || entity instanceof EntityPainting || entity instanceof EntityItem || entity instanceof EntityXPOrb )
+        {
+            range = config.miscTrackingRange;
+        }
+        // Cauldron start - allow for 0 to disable tracking ranges
+        if (range == 0)
+        {
+            return defaultRange;
+        }
+        // Cauldron end
+
+        return Math.min( config.maxTrackingRange, range );
+    }
+}