001    package net.minecraft.src;
002    
003    public class EnchantmentProtection extends Enchantment
004    {
005        /** Holds the name to be translated of each protection type. */
006        private static final String[] protectionName = new String[] {"all", "fire", "fall", "explosion", "projectile"};
007    
008        /**
009         * Holds the base factor of enchantability needed to be able to use the enchant.
010         */
011        private static final int[] baseEnchantability = new int[] {1, 10, 5, 5, 3};
012    
013        /**
014         * Holds how much each level increased the enchantability factor to be able to use this enchant.
015         */
016        private static final int[] levelEnchantability = new int[] {11, 8, 6, 8, 6};
017    
018        /**
019         * Used on the formula of base enchantability, this is the 'window' factor of values to be able to use thing
020         * enchant.
021         */
022        private static final int[] thresholdEnchantability = new int[] {20, 12, 10, 12, 15};
023    
024        /**
025         * Defines the type of protection of the enchantment, 0 = all, 1 = fire, 2 = fall (feather fall), 3 = explosion and
026         * 4 = projectile.
027         */
028        public final int protectionType;
029    
030        public EnchantmentProtection(int par1, int par2, int par3)
031        {
032            super(par1, par2, EnumEnchantmentType.armor);
033            this.protectionType = par3;
034    
035            if (par3 == 2)
036            {
037                this.type = EnumEnchantmentType.armor_feet;
038            }
039        }
040    
041        /**
042         * Returns the minimal value of enchantability needed on the enchantment level passed.
043         */
044        public int getMinEnchantability(int par1)
045        {
046            return baseEnchantability[this.protectionType] + (par1 - 1) * levelEnchantability[this.protectionType];
047        }
048    
049        /**
050         * Returns the maximum value of enchantability nedded on the enchantment level passed.
051         */
052        public int getMaxEnchantability(int par1)
053        {
054            return this.getMinEnchantability(par1) + thresholdEnchantability[this.protectionType];
055        }
056    
057        /**
058         * Returns the maximum level that the enchantment can have.
059         */
060        public int getMaxLevel()
061        {
062            return 4;
063        }
064    
065        /**
066         * Calculates de damage protection of the enchantment based on level and damage source passed.
067         */
068        public int calcModifierDamage(int par1, DamageSource par2DamageSource)
069        {
070            if (par2DamageSource.canHarmInCreative())
071            {
072                return 0;
073            }
074            else
075            {
076                int var3 = (6 + par1 * par1) / 2;
077                return this.protectionType == 0 ? var3 : (this.protectionType == 1 && par2DamageSource.isFireDamage() ? var3 : (this.protectionType == 2 && par2DamageSource == DamageSource.fall ? var3 * 2 : ((this.protectionType != 3 || par2DamageSource != DamageSource.explosion) && par2DamageSource != DamageSource.field_76375_l ? (this.protectionType == 4 && par2DamageSource.isProjectile() ? var3 : 0) : var3)));
078            }
079        }
080    
081        /**
082         * Return the name of key in translation table of this enchantment.
083         */
084        public String getName()
085        {
086            return "enchantment.protect." + protectionName[this.protectionType];
087        }
088    
089        /**
090         * Determines if the enchantment passed can be applyied together with this enchantment.
091         */
092        public boolean canApplyTogether(Enchantment par1Enchantment)
093        {
094            if (par1Enchantment instanceof EnchantmentProtection)
095            {
096                EnchantmentProtection var2 = (EnchantmentProtection)par1Enchantment;
097                return var2.protectionType == this.protectionType ? false : this.protectionType == 2 || var2.protectionType == 2;
098            }
099            else
100            {
101                return super.canApplyTogether(par1Enchantment);
102            }
103        }
104    }