001package net.minecraftforge.common; 002 003import java.util.*; 004import java.util.Map.Entry; 005 006import com.google.common.collect.ArrayListMultimap; 007import com.google.common.collect.ListMultimap; 008 009import cpw.mods.fml.common.FMLLog; 010import cpw.mods.fml.common.Loader; 011 012import net.minecraft.block.Block; 013import net.minecraft.entity.EntityLiving; 014import net.minecraft.entity.item.EntityItem; 015import net.minecraft.entity.player.EntityPlayer; 016import net.minecraft.item.Item; 017import net.minecraft.item.ItemArmor; 018import net.minecraft.item.ItemAxe; 019import net.minecraft.item.ItemPickaxe; 020import net.minecraft.item.ItemSpade; 021import net.minecraft.item.ItemStack; 022import net.minecraft.util.DamageSource; 023import net.minecraft.util.EnumMovingObjectType; 024import net.minecraft.util.MovingObjectPosition; 025import net.minecraft.util.WeightedRandom; 026import net.minecraft.util.WeightedRandomItem; 027import net.minecraft.world.World; 028import net.minecraftforge.event.ForgeEventFactory; 029import net.minecraftforge.event.entity.item.ItemTossEvent; 030import net.minecraftforge.event.entity.living.*; 031import net.minecraftforge.event.entity.living.LivingEvent.*; 032 033public class ForgeHooks 034{ 035 static class GrassEntry extends WeightedRandomItem 036 { 037 public final Block block; 038 public final int metadata; 039 public GrassEntry(Block block, int meta, int weight) 040 { 041 super(weight); 042 this.block = block; 043 this.metadata = meta; 044 } 045 } 046 047 static class SeedEntry extends WeightedRandomItem 048 { 049 public final ItemStack seed; 050 public SeedEntry(ItemStack seed, int weight) 051 { 052 super(weight); 053 this.seed = seed; 054 } 055 } 056 static final List<GrassEntry> grassList = new ArrayList<GrassEntry>(); 057 static final List<SeedEntry> seedList = new ArrayList<SeedEntry>(); 058 059 public static void plantGrass(World world, int x, int y, int z) 060 { 061 GrassEntry grass = (GrassEntry)WeightedRandom.getRandomItem(world.rand, grassList); 062 if (grass == null || grass.block == null || !grass.block.canBlockStay(world, x, y, z)) 063 { 064 return; 065 } 066 world.setBlock(x, y, z, grass.block.blockID, grass.metadata, 3); 067 } 068 069 public static ItemStack getGrassSeed(World world) 070 { 071 SeedEntry entry = (SeedEntry)WeightedRandom.getRandomItem(world.rand, seedList); 072 if (entry == null || entry.seed == null) 073 { 074 return null; 075 } 076 return entry.seed.copy(); 077 } 078 079 private static boolean toolInit = false; 080 static HashMap<Item, List> toolClasses = new HashMap<Item, List>(); 081 static HashMap<List, Integer> toolHarvestLevels = new HashMap<List, Integer>(); 082 static HashSet<List> toolEffectiveness = new HashSet<List>(); 083 084 public static boolean canHarvestBlock(Block block, EntityPlayer player, int metadata) 085 { 086 if (block.blockMaterial.isToolNotRequired()) 087 { 088 return true; 089 } 090 091 ItemStack stack = player.inventory.getCurrentItem(); 092 if (stack == null) 093 { 094 return player.canHarvestBlock(block); 095 } 096 097 List info = toolClasses.get(stack.getItem()); 098 if (info == null) 099 { 100 return player.canHarvestBlock(block); 101 } 102 103 Object[] tmp = info.toArray(); 104 String toolClass = (String)tmp[0]; 105 int harvestLevel = (Integer)tmp[1]; 106 107 Integer blockHarvestLevel = toolHarvestLevels.get(Arrays.asList(block, metadata, toolClass)); 108 if (blockHarvestLevel == null) 109 { 110 return player.canHarvestBlock(block); 111 } 112 113 if (blockHarvestLevel > harvestLevel) 114 { 115 return false; 116 } 117 return true; 118 } 119 120 public static boolean canToolHarvestBlock(Block block, int metadata, ItemStack stack) 121 { 122 if (stack == null) return false; 123 List info = toolClasses.get(stack.getItem()); 124 if (info == null) return false; 125 126 Object[] tmp = info.toArray(); 127 String toolClass = (String)tmp[0]; 128 int harvestLevel = (Integer)tmp[1]; 129 130 Integer blockHarvestLevel = toolHarvestLevels.get(Arrays.asList(block, metadata, toolClass)); 131 return !(blockHarvestLevel == null || blockHarvestLevel > harvestLevel); 132 } 133 134 public static float blockStrength(Block block, EntityPlayer player, World world, int x, int y, int z) 135 { 136 int metadata = world.getBlockMetadata(x, y, z); 137 float hardness = block.getBlockHardness(world, x, y, z); 138 if (hardness < 0.0F) 139 { 140 return 0.0F; 141 } 142 143 if (!canHarvestBlock(block, player, metadata)) 144 { 145 float speed = ForgeEventFactory.getBreakSpeed(player, block, metadata, 1.0f); 146 return (speed < 0 ? 0 : speed) / hardness / 100F; 147 } 148 else 149 { 150 return player.getCurrentPlayerStrVsBlock(block, false, metadata) / hardness / 30F; 151 } 152 } 153 154 public static boolean isToolEffective(ItemStack stack, Block block, int metadata) 155 { 156 List toolClass = toolClasses.get(stack.getItem()); 157 return toolClass != null && toolEffectiveness.contains(Arrays.asList(block, metadata, toolClass.get(0))); 158 } 159 160 static void initTools() 161 { 162 if (toolInit) 163 { 164 return; 165 } 166 toolInit = true; 167 168 MinecraftForge.setToolClass(Item.pickaxeWood, "pickaxe", 0); 169 MinecraftForge.setToolClass(Item.pickaxeStone, "pickaxe", 1); 170 MinecraftForge.setToolClass(Item.pickaxeSteel, "pickaxe", 2); 171 MinecraftForge.setToolClass(Item.pickaxeGold, "pickaxe", 0); 172 MinecraftForge.setToolClass(Item.pickaxeDiamond, "pickaxe", 3); 173 174 MinecraftForge.setToolClass(Item.axeWood, "axe", 0); 175 MinecraftForge.setToolClass(Item.axeStone, "axe", 1); 176 MinecraftForge.setToolClass(Item.axeSteel, "axe", 2); 177 MinecraftForge.setToolClass(Item.axeGold, "axe", 0); 178 MinecraftForge.setToolClass(Item.axeDiamond, "axe", 3); 179 180 MinecraftForge.setToolClass(Item.shovelWood, "shovel", 0); 181 MinecraftForge.setToolClass(Item.shovelStone, "shovel", 1); 182 MinecraftForge.setToolClass(Item.shovelSteel, "shovel", 2); 183 MinecraftForge.setToolClass(Item.shovelGold, "shovel", 0); 184 MinecraftForge.setToolClass(Item.shovelDiamond, "shovel", 3); 185 186 for (Block block : ItemPickaxe.blocksEffectiveAgainst) 187 { 188 MinecraftForge.setBlockHarvestLevel(block, "pickaxe", 0); 189 } 190 191 for (Block block : ItemSpade.blocksEffectiveAgainst) 192 { 193 MinecraftForge.setBlockHarvestLevel(block, "shovel", 0); 194 } 195 196 for (Block block : ItemAxe.blocksEffectiveAgainst) 197 { 198 MinecraftForge.setBlockHarvestLevel(block, "axe", 0); 199 } 200 201 MinecraftForge.setBlockHarvestLevel(Block.obsidian, "pickaxe", 3); 202 MinecraftForge.setBlockHarvestLevel(Block.oreEmerald, "pickaxe", 2); 203 MinecraftForge.setBlockHarvestLevel(Block.oreDiamond, "pickaxe", 2); 204 MinecraftForge.setBlockHarvestLevel(Block.blockDiamond, "pickaxe", 2); 205 MinecraftForge.setBlockHarvestLevel(Block.oreGold, "pickaxe", 2); 206 MinecraftForge.setBlockHarvestLevel(Block.blockGold, "pickaxe", 2); 207 MinecraftForge.setBlockHarvestLevel(Block.oreIron, "pickaxe", 1); 208 MinecraftForge.setBlockHarvestLevel(Block.blockSteel, "pickaxe", 1); 209 MinecraftForge.setBlockHarvestLevel(Block.oreLapis, "pickaxe", 1); 210 MinecraftForge.setBlockHarvestLevel(Block.blockLapis, "pickaxe", 1); 211 MinecraftForge.setBlockHarvestLevel(Block.oreRedstone, "pickaxe", 2); 212 MinecraftForge.setBlockHarvestLevel(Block.oreRedstoneGlowing, "pickaxe", 2); 213 MinecraftForge.removeBlockEffectiveness(Block.oreRedstone, "pickaxe"); 214 MinecraftForge.removeBlockEffectiveness(Block.obsidian, "pickaxe"); 215 MinecraftForge.removeBlockEffectiveness(Block.oreRedstoneGlowing, "pickaxe"); 216 } 217 218 public static int getTotalArmorValue(EntityPlayer player) 219 { 220 int ret = 0; 221 for (int x = 0; x < player.inventory.armorInventory.length; x++) 222 { 223 ItemStack stack = player.inventory.armorInventory[x]; 224 if (stack != null && stack.getItem() instanceof ISpecialArmor) 225 { 226 ret += ((ISpecialArmor)stack.getItem()).getArmorDisplay(player, stack, x); 227 } 228 else if (stack != null && stack.getItem() instanceof ItemArmor) 229 { 230 ret += ((ItemArmor)stack.getItem()).damageReduceAmount; 231 } 232 } 233 return ret; 234 } 235 236 static 237 { 238 grassList.add(new GrassEntry(Block.plantYellow, 0, 20)); 239 grassList.add(new GrassEntry(Block.plantRed, 0, 10)); 240 seedList.add(new SeedEntry(new ItemStack(Item.seeds), 10)); 241 initTools(); 242 } 243 244 /** 245 * Called when a player uses 'pick block', calls new Entity and Block hooks. 246 */ 247 public static boolean onPickBlock(MovingObjectPosition target, EntityPlayer player, World world) 248 { 249 ItemStack result = null; 250 boolean isCreative = player.capabilities.isCreativeMode; 251 252 if (target.typeOfHit == EnumMovingObjectType.TILE) 253 { 254 int x = target.blockX; 255 int y = target.blockY; 256 int z = target.blockZ; 257 Block var8 = Block.blocksList[world.getBlockId(x, y, z)]; 258 259 if (var8 == null) 260 { 261 return false; 262 } 263 264 result = var8.getPickBlock(target, world, x, y, z); 265 } 266 else 267 { 268 if (target.typeOfHit != EnumMovingObjectType.ENTITY || target.entityHit == null || !isCreative) 269 { 270 return false; 271 } 272 273 result = target.entityHit.getPickedResult(target); 274 } 275 276 if (result == null) 277 { 278 return false; 279 } 280 281 for (int x = 0; x < 9; x++) 282 { 283 ItemStack stack = player.inventory.getStackInSlot(x); 284 if (stack != null && stack.isItemEqual(result) && ItemStack.areItemStackTagsEqual(stack, result)) 285 { 286 player.inventory.currentItem = x; 287 return true; 288 } 289 } 290 291 if (!isCreative) 292 { 293 return false; 294 } 295 296 int slot = player.inventory.getFirstEmptyStack(); 297 if (slot < 0 || slot >= 9) 298 { 299 slot = player.inventory.currentItem; 300 } 301 302 player.inventory.setInventorySlotContents(slot, result); 303 player.inventory.currentItem = slot; 304 return true; 305 } 306 307 //Optifine Helper Functions u.u, these are here specifically for Optifine 308 //Note: When using Optfine, these methods are invoked using reflection, which 309 //incurs a major performance penalty. 310 public static void onLivingSetAttackTarget(EntityLiving entity, EntityLiving target) 311 { 312 MinecraftForge.EVENT_BUS.post(new LivingSetAttackTargetEvent(entity, target)); 313 } 314 315 public static boolean onLivingUpdate(EntityLiving entity) 316 { 317 return MinecraftForge.EVENT_BUS.post(new LivingUpdateEvent(entity)); 318 } 319 320 public static boolean onLivingAttack(EntityLiving entity, DamageSource src, int amount) 321 { 322 return MinecraftForge.EVENT_BUS.post(new LivingAttackEvent(entity, src, amount)); 323 } 324 325 public static int onLivingHurt(EntityLiving entity, DamageSource src, int amount) 326 { 327 LivingHurtEvent event = new LivingHurtEvent(entity, src, amount); 328 return (MinecraftForge.EVENT_BUS.post(event) ? 0 : event.ammount); 329 } 330 331 public static boolean onLivingDeath(EntityLiving entity, DamageSource src) 332 { 333 return MinecraftForge.EVENT_BUS.post(new LivingDeathEvent(entity, src)); 334 } 335 336 public static boolean onLivingDrops(EntityLiving entity, DamageSource source, ArrayList<EntityItem> drops, int lootingLevel, boolean recentlyHit, int specialDropValue) 337 { 338 return MinecraftForge.EVENT_BUS.post(new LivingDropsEvent(entity, source, drops, lootingLevel, recentlyHit, specialDropValue)); 339 } 340 341 public static float onLivingFall(EntityLiving entity, float distance) 342 { 343 LivingFallEvent event = new LivingFallEvent(entity, distance); 344 return (MinecraftForge.EVENT_BUS.post(event) ? 0.0f : event.distance); 345 } 346 347 public static boolean isLivingOnLadder(Block block, World world, int x, int y, int z) 348 { 349 return block != null && block.isLadder(world, x, y, z); 350 } 351 352 public static void onLivingJump(EntityLiving entity) 353 { 354 MinecraftForge.EVENT_BUS.post(new LivingJumpEvent(entity)); 355 } 356 357 public static EntityItem onPlayerTossEvent(EntityPlayer player, ItemStack item) 358 { 359 player.captureDrops = true; 360 EntityItem ret = player.dropPlayerItemWithRandomChoice(item, false); 361 player.capturedDrops.clear(); 362 player.captureDrops = false; 363 364 ItemTossEvent event = new ItemTossEvent(ret, player); 365 if (MinecraftForge.EVENT_BUS.post(event)) 366 { 367 return null; 368 } 369 370 player.joinEntityItemWithWorld(event.entityItem); 371 return event.entityItem; 372 } 373}