Rework the vanilla link fix so that hover/click events aren't lost

nms-patches/PlayerList.patch

@@ -1,5 +1,5 @@
---- ../work/decompile-8eb82bde/net/minecraft/server/PlayerList.java	2014-12-13 09:37:43.506950406 +0000
-+++ src/main/java/net/minecraft/server/PlayerList.java	2014-12-13 09:35:13.993746030 +0000
+--- ../work/decompile-8eb82bde/net/minecraft/server/PlayerList.java	2014-12-13 10:25:48.845021085 +0000
++++ src/main/java/net/minecraft/server/PlayerList.java	2014-12-13 10:25:34.093021245 +0000
 @@ -18,6 +18,26 @@
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
@@ -558,7 +558,8 @@
 +        double d1 = entity.locZ;
 +        double d2 = 8.0D;
 +        float f = entity.yaw;
-+
+ 
+-            entityplayer.playerConnection.sendPacket(new PacketPlayOutEntityEffect(entityplayer.getId(), mobeffect));
 +        worldserver.methodProfiler.a("moving");
 +        */
 +        if (worldserver1.dimension == -1) {
@@ -599,8 +600,8 @@
 +                worldserver.entityJoinedWorld(entity, false);
 +            }
 +            */
-+        }
-+
+         }
+ 
 +        // worldserver.methodProfiler.b();
 +        if (i != 1) {
 +            worldserver.methodProfiler.a("placing");
@@ -613,12 +614,11 @@
 +                worldserver1.addEntity(entity);
 +                worldserver1.entityJoinedWorld(entity, false);
 +            }
- 
--            entityplayer.playerConnection.sendPacket(new PacketPlayOutEntityEffect(entityplayer.getId(), mobeffect));
++
 +            worldserver.methodProfiler.b();
 +            */
-         }
- 
++        }
++
 +        // entity.spawnIn(worldserver1);
 +        return new Location(worldserver1.getWorld(), d0, y, d1, yaw, pitch);
      }
@@ -796,7 +796,7 @@
      }
  
      public boolean getHasWhitelist() {
-@@ -711,16 +1097,28 @@
+@@ -711,16 +1097,25 @@
  
      public void v() {
          for (int i = 0; i < this.players.size(); ++i) {
@@ -819,15 +819,12 @@
  
 -        this.sendAll(new PacketPlayOutChat(ichatbasecomponent, (byte) i));
 +        // CraftBukkit start - we run this through our processor first so we can get web links etc
-+        // PAIL: Rename
-+        for (IChatBaseComponent component : CraftChatMessage.fromString(CraftChatMessage.fromComponent(ichatbasecomponent, EnumChatFormat.WHITE))) {
-+            this.sendAll(new PacketPlayOutChat(component, (byte) i));
-+        }
++        this.sendAll(new PacketPlayOutChat(CraftChatMessage.fixComponent(ichatbasecomponent), (byte) i));
 +        // CraftBukkit end
      }
  
      public void sendMessage(IChatBaseComponent ichatbasecomponent) {
-@@ -754,11 +1152,10 @@
+@@ -754,11 +1149,10 @@
      public void a(int i) {
          this.r = i;
          if (this.server.worldServer != null) {

src/main/java/org/bukkit/craftbukkit/util/CraftChatMessage.java

@@ -15,11 +15,14 @@ import net.minecraft.server.IChatBaseComponent;
 
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.ImmutableMap.Builder;
+import net.minecraft.server.ChatMessage;
 
 public final class CraftChatMessage {
+    
+    private static final Pattern LINK_PATTERN = Pattern.compile("((?:(?:https?):\\/\\/)?(?:[-\\w_\\.]{2,}\\.[a-z]{2,4}.*?(?=[\\.\\?!,;:]?(?:[" + String.valueOf(org.bukkit.ChatColor.COLOR_CHAR) + " \\n]|$))))");
     private static class StringMessage {
         private static final Map<Character, EnumChatFormat> formatMap;
-        private static final Pattern INCREMENTAL_PATTERN = Pattern.compile("(" + String.valueOf(org.bukkit.ChatColor.COLOR_CHAR) + "[0-9a-fk-or])|(\\n)|(?:(https?://[^ ][^ ]*?)(?=[\\.\\?!,;:]?(?:[ \\n]|$)))", Pattern.CASE_INSENSITIVE);
+        private static final Pattern INCREMENTAL_PATTERN = Pattern.compile("(" + String.valueOf(org.bukkit.ChatColor.COLOR_CHAR) + "[0-9a-fk-or])|(\\n)|((?:(?:https?):\\/\\/)?(?:[-\\w_\\.]{2,}\\.[a-z]{2,4}.*?(?=[\\.\\?!,;:]?(?:[" + String.valueOf(org.bukkit.ChatColor.COLOR_CHAR) + " \\n]|$))))", Pattern.CASE_INSENSITIVE);
 
         static {
             Builder<Character, EnumChatFormat> builder = ImmutableMap.builder();
@@ -89,6 +92,9 @@ public final class CraftChatMessage {
                     }
                     break;
                 case 3:
+                    if ( !( match.startsWith( "http://" ) || match.startsWith( "https://" ) ) ) {
+                        match = "http://" + match;
+                    }
                     modifier.setChatClickable(new ChatClickable(EnumClickAction.OPEN_URL, match));
                     appendNewComponent(matcher.end(groupId));
                     modifier.setChatClickable((ChatClickable) null);
@@ -100,7 +106,7 @@ public final class CraftChatMessage {
                 appendNewComponent(message.length());
             }
 
-            output = list.toArray(new IChatBaseComponent[0]);
+            output = list.toArray(new IChatBaseComponent[list.size()]);
         }
 
         private void appendNewComponent(int index) {
@@ -161,6 +167,82 @@ public final class CraftChatMessage {
         return out.toString().replaceFirst("^(" + defaultColor + ")*", "");
     }
 
+    public static IChatBaseComponent fixComponent(IChatBaseComponent component) {
+        Matcher matcher = LINK_PATTERN.matcher("");
+        return fixComponent(component, matcher);
+    }
+
+    private static IChatBaseComponent fixComponent(IChatBaseComponent component, Matcher matcher) {
+        if (component instanceof ChatComponentText) {
+            ChatComponentText text = ((ChatComponentText) component);
+            String msg = text.g();
+            if (matcher.reset(msg).find()) {
+                matcher.reset();
+
+                ChatModifier modifier = text.getChatModifier() != null ?
+                        text.getChatModifier() : new ChatModifier();
+                List<IChatBaseComponent> extras = new ArrayList<IChatBaseComponent>();
+                List<IChatBaseComponent> extrasOld = new ArrayList<IChatBaseComponent>(text.a());
+                component = text = new ChatComponentText("");
+
+                int pos = 0;
+                while (matcher.find()) {
+                    String match = matcher.group();
+
+                    if ( !( match.startsWith( "http://" ) || match.startsWith( "https://" ) ) ) {
+                        match = "http://" + match;
+                    }
+
+                    ChatComponentText prev = new ChatComponentText(msg.substring(pos, matcher.start()));
+                    prev.setChatModifier(modifier);
+                    extras.add(prev);
+
+                    ChatComponentText link = new ChatComponentText(matcher.group());
+                    ChatModifier linkModi = modifier.clone();
+                    linkModi.setChatClickable(new ChatClickable(EnumClickAction.OPEN_URL, match));
+                    link.setChatModifier(linkModi);
+                    extras.add(link);
+
+                    pos = matcher.end();
+                }
+
+                ChatComponentText prev = new ChatComponentText(msg.substring(pos));
+                prev.setChatModifier(modifier);
+                extras.add(prev);
+                extras.addAll(extrasOld);
+
+                for (IChatBaseComponent c : extras) {
+                    text.addSibling(c);
+                }
+            }
+        }
+
+        List extras = component.a();
+        for (int i = 0; i < extras.size(); i++) {
+            IChatBaseComponent comp = (IChatBaseComponent) extras.get(i);
+            if (comp.getChatModifier() != null && comp.getChatModifier().h() == null) {
+                extras.set(i, fixComponent(comp, matcher));
+            }
+        }
+
+        if (component instanceof ChatMessage) {
+            Object[] subs = ((ChatMessage) component).j();
+            for (int i = 0; i < subs.length; i++) {
+                Object comp = subs[i];
+                if (comp instanceof IChatBaseComponent) {
+                    IChatBaseComponent c = (IChatBaseComponent) comp;
+                    if (c.getChatModifier() != null && c.getChatModifier().h() == null) {
+                        subs[i] = fixComponent(c, matcher);
+                    }
+                } else if (comp instanceof String && matcher.reset((String)comp).find()) {
+                    subs[i] = fixComponent(new ChatComponentText((String) comp), matcher);
+                }
+            }
+        }
+
+        return component;
+    }
+
     private CraftChatMessage() {
     }
 }