From 4c420e6aa82cf8906c17fd8cf37802fb64484944 Mon Sep 17 00:00:00 2001
From: Erik Broes <erikbroes@grum.nl>
Date: Fri, 18 Mar 2011 23:03:30 +0100
Subject: [PATCH] BLOCK_PLACE supports pie, diode and reed

---
 .../java/net/minecraft/server/ItemReed.java   | 128 ++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 src/main/java/net/minecraft/server/ItemReed.java

diff --git a/src/main/java/net/minecraft/server/ItemReed.java b/src/main/java/net/minecraft/server/ItemReed.java
new file mode 100644
index 0000000000..5bd3be0440
--- /dev/null
+++ b/src/main/java/net/minecraft/server/ItemReed.java
@@ -0,0 +1,128 @@
+package net.minecraft.server;
+
+// CraftBukkit start
+import org.bukkit.block.BlockFace;
+import org.bukkit.block.BlockState;
+import org.bukkit.craftbukkit.block.CraftBlock;
+import org.bukkit.craftbukkit.block.CraftBlockState;
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Event.Type;
+import org.bukkit.event.block.BlockPlaceEvent;
+import org.bukkit.Material;
+// CraftBukkit end
+
+public class ItemReed extends Item {
+
+    private int a;
+
+    public ItemReed(int i, Block block) {
+        super(i);
+        this.a = block.id;
+    }
+
+    public boolean a(ItemStack itemstack, EntityHuman entityhuman, World world, int i, int j, int k, int l) {
+        // CraftBukkit start -- Bail if we have nothing of the item in hand
+        if (itemstack.count == 0) {
+            return false;
+        }
+
+        CraftBlock blockClicked = (CraftBlock) ((WorldServer) world).getWorld().getBlockAt(i, j, k);
+        BlockFace faceClicked = CraftBlock.notchToBlockFace(l);
+        // CraftBukkit end
+
+        if (world.getTypeId(i, j, k) == Block.SNOW.id) {
+            l = 0;
+        } else {
+            if (l == 0) {
+                --j;
+            }
+
+            if (l == 1) {
+                ++j;
+            }
+
+            if (l == 2) {
+                --k;
+            }
+
+            if (l == 3) {
+                ++k;
+            }
+
+            if (l == 4) {
+                --i;
+            }
+
+            if (l == 5) {
+                ++i;
+            }
+        }
+
+        if (itemstack.count == 0) {
+            return false;
+        } else {
+            // CraftBukkit start
+            /* We store the old data so we can undo it. Snow(78) and half-steps(44) are special in that they replace the block itself,
+             * rather than the block touching the face we clicked on.
+             */
+            int typeId = blockClicked.getTypeId();
+            org.bukkit.block.Block placedBlock = blockClicked.getFace(faceClicked);
+
+            if (typeId == Block.SNOW.id || (typeId == Block.STEP.id && itemstack.id == Block.STEP.id && faceClicked == BlockFace.UP))
+                placedBlock = blockClicked;
+
+            final BlockState replacedBlockState = new CraftBlockState(placedBlock);
+            // CraftBukkit end
+
+            if (world.a(this.a, i, j, k, false)) {
+                Block block = Block.byId[this.a];
+
+                // CraftBukkit start - This executes the placement of the block
+                /**
+                 * @see net.minecraft.server.World#e(int i, int j, int k, int l)
+                 * 
+                 * This replaces world.e(IIII), we're doing this because we need to
+                 * hook between the 'placement' and the informing to 'world' so we can
+                 * sanely undo this.
+                 *
+                 * Whenever the call to 'world.e' changes we need to figure out again what to
+                 * replace this with.
+                 */
+                if (world.setTypeId(i, j, k, this.a)) { // <-- world.e does this to place the block
+                    org.bukkit.Server server = ((WorldServer) world).getServer();
+                    Type eventType = Type.BLOCK_PLACED;
+                    org.bukkit.inventory.ItemStack itemInHand = new CraftItemStack(itemstack);
+                    Player thePlayer = (entityhuman == null) ? null : (Player) entityhuman.getBukkitEntity();
+
+                    ChunkCoordinates chunkcoordinates = world.l();
+                    int spawnX = chunkcoordinates.a;
+                    int spawnZ = chunkcoordinates.c;
+
+                    int distanceFromSpawn = (int) Math.max(Math.abs(i - spawnX), Math.abs(k - spawnZ));
+
+                    // CraftBukkit Configurable spawn protection start
+                    boolean canBuild = distanceFromSpawn > ((WorldServer) world).x.spawnProtection || thePlayer.isOp();
+
+                    BlockPlaceEvent event = new BlockPlaceEvent(eventType, placedBlock, replacedBlockState, blockClicked, itemInHand, thePlayer, canBuild);
+                    server.getPluginManager().callEvent(event);
+
+                    if (event.isCancelled() || !event.canBuild()) {
+                        // CraftBukkit Undo -- this only has reed, repeater and pie blocks
+                        world.setTypeIdAndData(i, j, k, replacedBlockState.getTypeId(), replacedBlockState.getRawData());
+                    } else {
+                        world.f(i, j, k, a); // <-- world.e does this on success (tell the world)
+
+                        Block.byId[this.a].d(world, i, j, k, l);
+                        Block.byId[this.a].a(world, i, j, k, (EntityLiving) entityhuman);
+                        world.a((double) ((float) i + 0.5F), (double) ((float) j + 0.5F), (double) ((float) k + 0.5F), block.stepSound.c(), (block.stepSound.a() + 1.0F) / 2.0F, block.stepSound.b() * 0.8F);
+                        --itemstack.count;
+                    }
+                    // CraftBukkit end
+                }
+            }
+
+            return true;
+        }
+    }
+}