Addition: Added isAllowedOnBooks hook to Enchantments Closes #589

patches/minecraft/net/minecraft/enchantment/Enchantment.java.patch

@@ -10,7 +10,7 @@
  import net.minecraft.entity.EntityLivingBase;
  import net.minecraft.item.ItemStack;
  import net.minecraft.util.DamageSource;
-@@ -207,6 +210,27 @@
+@@ -207,6 +210,36 @@
          return this.type.canEnchantItem(par1ItemStack.getItem());
      }
  
@@ -34,6 +34,15 @@
 +    {
 +        ObjectArrays.concat(enchantmentsBookList, enchantment);
 +    }
++
++    /**
++     * Is this enchantment allowed to be enchanted on books via Enchantment Table
++     * @return false to disable the vanilla feature
++     */
++    public boolean isAllowedOnBooks()
++    {
++        return true;
++    }
 +
      static
      {

patches/minecraft/net/minecraft/enchantment/EnchantmentHelper.java.patch

@@ -1,10 +1,11 @@
 --- ../src_base/minecraft/net/minecraft/enchantment/EnchantmentHelper.java
 +++ ../src_work/minecraft/net/minecraft/enchantment/EnchantmentHelper.java
-@@ -463,7 +463,7 @@
+@@ -463,7 +463,8 @@
          {
              Enchantment enchantment = aenchantment[k];
  
 -            if (enchantment != null && (enchantment.type.canEnchantItem(item) || flag))
++            flag = (par1ItemStack.itemID == Item.book.itemID) && enchantment.isAllowedOnBooks();
 +            if (enchantment != null && (enchantment.canApplyAtEnchantingTable(par1ItemStack) || flag))
              {
                  for (int l = enchantment.getMinLevel(); l <= enchantment.getMaxLevel(); ++l)