Fix TextWrapping issues; Now limits the packets send to the client to either: 119 chars or 320 width. This will strip disallowed characters, propagate colors properly to the next line and not 'eat' multiple color-codes.

src/main/java/net/minecraft/server/NetServerHandler.java

@@ -14,6 +14,7 @@ import org.bukkit.craftbukkit.block.CraftBlock;
 import org.bukkit.craftbukkit.entity.CraftPlayer;
 import org.bukkit.craftbukkit.event.CraftEventFactory;
 import org.bukkit.craftbukkit.CraftServer;
+import org.bukkit.craftbukkit.TextWrapper;
 import org.bukkit.entity.Player;
 import org.bukkit.event.Event;
 import org.bukkit.event.block.*;
@@ -579,9 +580,15 @@ public class NetServerHandler extends NetHandler implements ICommandListener {
         if (packet instanceof Packet6SpawnPosition) {
             Packet6SpawnPosition packet6 = (Packet6SpawnPosition) packet;
             this.player.compassTarget = new Location(getPlayer().getWorld(), packet6.x, packet6.y, packet6.z);
+        } else if (packet instanceof Packet3Chat) {
+            String message = ((Packet3Chat) packet).a;
+            for (final String line: TextWrapper.wrapText(message)) {
+                this.networkManager.a(new Packet3Chat(line));
+            }
+            packet = null;
         }
+        if (packet != null) this.networkManager.a(packet);
         // CraftBukkit
-        this.networkManager.a(packet);
         this.g = this.f;
     }
 

src/main/java/net/minecraft/server/Packet.java

@@ -150,9 +150,9 @@ public abstract class Packet {
         }
     }
 
-    public abstract void a(DataInputStream datainputstream);
+    public abstract void a(DataInputStream datainputstream) throws IOException; // CraftBukkit
 
-    public abstract void a(DataOutputStream dataoutputstream);
+    public abstract void a(DataOutputStream dataoutputstream) throws IOException; // CraftBukkit
 
     public abstract void a(NetHandler nethandler);
 

src/main/java/net/minecraft/server/Packet3Chat.java

@@ -0,0 +1,38 @@
+package net.minecraft.server;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+public class Packet3Chat extends Packet {
+
+    public String a;
+
+    public Packet3Chat() {}
+
+    public Packet3Chat(String s) {
+        // CraftBukkit start - handle this later
+        //if (s.length() > 119) {
+        //    s = s.substring(0, 119);
+        //}
+        // CraftBukkit end
+
+        this.a = s;
+    }
+
+    public void a(DataInputStream datainputstream) throws IOException { // CraftBukkit
+        this.a = a(datainputstream, 119);
+    }
+
+    public void a(DataOutputStream dataoutputstream) throws IOException { // CraftBukkit
+        a(this.a, dataoutputstream);
+    }
+
+    public void a(NetHandler nethandler) {
+        nethandler.a(this);
+    }
+
+    public int a() {
+        return this.a.length();
+    }
+}

src/main/java/org/bukkit/craftbukkit/TextWrapper.java

@@ -2,6 +2,8 @@ package org.bukkit.craftbukkit;
 
 import java.util.regex.Pattern;
 
+import javax.sound.sampled.LineListener;
+
 public class TextWrapper {
     private static final int[] characterWidths = new int[] {
         1, 9, 9, 8, 8, 8, 8, 7, 9, 8, 9, 9, 8, 9, 9, 9,
@@ -21,50 +23,70 @@ public class TextWrapper {
         8, 7, 7, 8, 7, 8, 8, 8, 7, 8, 8, 7, 9, 9, 6, 7,
         7, 7, 7, 7, 9, 6, 7, 8, 7, 6, 6, 9, 7, 6, 7, 1
     };
+    private static final char COLOR_CHAR = '\u00A7';
     private static final int CHAT_WINDOW_WIDTH = 320;
-    private static final Pattern pattern = Pattern.compile("\n.*\u00A7", Pattern.DOTALL);
+    private static final int CHAT_STRING_LENGTH = 119;
+    private static final String allowedChars = net.minecraft.server.FontAllowedCharacters.a;
 
     public static String[] wrapText(final String text) {
         final StringBuilder out = new StringBuilder();
         char colorChar = 'f';
         int lineWidth = 0;
-        int lineCount = 0;
-        boolean hasColored = true;
+        int lineLenght = 0;
+
+        // Go over the message char by char.
         for (int i = 0; i < text.length(); i++) {
             char ch = text.charAt(i);
-            if (ch == '\u00A7' && i < text.length() - 1) {
-                colorChar = text.charAt(++i);
-                hasColored = false;
-                continue;
-            } else if (ch >= characterWidths.length) {
-                ch = (char) (characterWidths.length - 1);
-            }
-            final int width = characterWidths[(int) ch];
-            if (lineWidth + width >= CHAT_WINDOW_WIDTH) {
-                out.append('\n');
-                lineCount++;
-                if (colorChar != 'f') {
-                    out.append('\u00A7');
-                    out.append(colorChar);
+
+            // Get the color
+            if (ch == COLOR_CHAR && i < text.length() - 1) {
+                // We might need a linebreak ... so ugly ;(
+                if (lineLenght + 2 > CHAT_STRING_LENGTH) {
+                    out.append('\n');
+                    lineLenght = 0;
+                    if (colorChar != 'f') {
+                        out.append(COLOR_CHAR).append(colorChar);
+                        lineLenght += 2;
+                    }
+                }
+                colorChar = text.charAt(++i);
+                out.append(COLOR_CHAR).append(colorChar);
+                lineLenght += 2;
+                continue;
+            }
+
+            // Figure out if it's allowed
+            int index = allowedChars.indexOf(ch);
+            if (index == -1) {
+                // Invalid character .. skip it.
+                continue;
+            } else {
+                // Sadly needed as the allowedChars string misses the first
+                index += 32;
+            }
+
+            // Find the width
+            final int width = characterWidths[ index ];
+
+            // See if we need a linebreak
+            if (lineLenght + 1 > CHAT_STRING_LENGTH || lineWidth + width >= CHAT_WINDOW_WIDTH) {
+                out.append('\n');
+                lineLenght = 0;
+
+                // Re-apply the last color if it isn't the default
+                if (colorChar != 'f') {
+                    out.append(COLOR_CHAR).append(colorChar);
+                    lineLenght += 2;
                 }
-                out.append(ch);
                 lineWidth = width;
             } else {
-                if (!hasColored) {
-                    out.append('\u00A7');
-                    out.append(colorChar);
-                    hasColored = true;
-                }
-                out.append(ch);
                 lineWidth += width;
             }
+            out.append(ch);
+            lineLenght++;
         }
 
-        // See if we need to split the string
-        String result = out.toString();
-        if (pattern.matcher(result).find()) return result.split("\n");
-
-        if (lineCount > 0) result.replace("\n", "");
-        return new String[] {result};
+        // Return it split
+        return out.toString().split("\n");
     }
 }

src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java

@@ -5,7 +5,6 @@ import java.net.SocketAddress;
 import net.minecraft.server.EntityHuman;
 import net.minecraft.server.EntityPlayer;
 import net.minecraft.server.ItemInWorldManager;
-import net.minecraft.server.Packet;
 import net.minecraft.server.Packet200Statistic;
 import net.minecraft.server.Packet3Chat;
 import net.minecraft.server.Packet6SpawnPosition;
@@ -17,7 +16,6 @@ import org.bukkit.Material;
 import org.bukkit.Statistic;
 import org.bukkit.craftbukkit.CraftServer;
 import org.bukkit.craftbukkit.CraftWorld;
-import org.bukkit.craftbukkit.TextWrapper;
 import org.bukkit.entity.Player;
 
 public class CraftPlayer extends CraftHumanEntity implements Player {
@@ -84,9 +82,7 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
     }
 
     public void sendMessage(String message) {
-        for (final String line: TextWrapper.wrapText(message)) {
-            getHandle().netServerHandler.sendPacket(new Packet3Chat(line));
-        }
+        this.sendRawMessage(message);
     }
 
     public String getDisplayName() {
@@ -256,7 +252,7 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         if (!material.isBlock()) {
             mat -= 255;
         }
-        
+
         sendStatistic(statistic.getId() + mat, amount);
     }
 
@@ -265,7 +261,7 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
             sendStatistic(id, Byte.MAX_VALUE);
             amount -= Byte.MAX_VALUE;
         }
-        
+
         getHandle().netServerHandler.sendPacket(new Packet200Statistic(id, amount));
     }
 }