Added ClientChatEvent. Closes #1442 (#3704)

patches/minecraft/net/minecraft/client/gui/GuiScreen.java.patch

@@ -8,7 +8,7 @@
  
      public void func_73863_a(int p_73863_1_, int p_73863_2_, float p_73863_3_)
      {
-@@ -147,7 +148,10 @@
+@@ -147,7 +145,10 @@
              }
          }
  
@@ -20,7 +20,7 @@
      }
  
      protected void func_146279_a(String p_146279_1_, int p_146279_2_, int p_146279_3_)
-@@ -157,7 +161,13 @@
+@@ -157,7 +158,13 @@
  
      protected void func_146283_a(List<String> p_146283_1_, int p_146283_2_, int p_146283_3_)
      {
@@ -35,7 +35,13 @@
          {
              GlStateManager.func_179101_C();
              RenderHelper.func_74518_a();
-@@ -418,6 +428,7 @@
+@@ -414,10 +421,13 @@
+ 
+     public void func_175281_b(String p_175281_1_, boolean p_175281_2_)
+     {
++        p_175281_1_ = net.minecraftforge.event.ForgeEventFactory.onClientSendMessage(p_175281_1_);
++        if (p_175281_1_.isEmpty()) return;
+         if (p_175281_2_)
          {
              this.field_146297_k.field_71456_v.func_146158_b().func_146239_a(p_175281_1_);
          }
@@ -43,7 +49,7 @@
  
          this.field_146297_k.field_71439_g.func_71165_d(p_175281_1_);
      }
-@@ -432,9 +443,15 @@
+@@ -432,9 +442,15 @@
  
                  if (guibutton.func_146116_c(this.field_146297_k, p_73864_1_, p_73864_2_))
                  {
@@ -59,7 +65,7 @@
                  }
              }
          }
-@@ -464,8 +481,12 @@
+@@ -464,8 +480,12 @@
          this.field_146289_q = p_146280_1_.field_71466_p;
          this.field_146294_l = p_146280_2_;
          this.field_146295_m = p_146280_3_;
@@ -72,7 +78,7 @@
      }
  
      public void func_183500_a(int p_183500_1_, int p_183500_2_)
-@@ -484,7 +505,10 @@
+@@ -484,7 +504,10 @@
          {
              while (Mouse.next())
              {
@@ -83,7 +89,7 @@
              }
          }
  
-@@ -492,7 +516,10 @@
+@@ -492,7 +515,10 @@
          {
              while (Keyboard.next())
              {
@@ -94,7 +100,7 @@
              }
          }
      }
-@@ -554,6 +581,7 @@
+@@ -554,6 +580,7 @@
      public void func_146276_q_()
      {
          this.func_146270_b(0);

src/main/java/net/minecraftforge/client/event/ClientChatEvent.java

@@ -0,0 +1,69 @@
+/*
+ * Minecraft Forge
+ * Copyright (c) 2016.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+package net.minecraftforge.client.event;
+
+import com.google.common.base.Strings;
+import net.minecraftforge.fml.common.eventhandler.Cancelable;
+import net.minecraftforge.fml.common.eventhandler.Event;
+import net.minecraftforge.event.ForgeEventFactory;
+import net.minecraftforge.common.MinecraftForge;
+import net.minecraft.client.gui.GuiScreen;
+
+/**
+ * ClientChatEvent is fired whenever the client is about to send a chat message or command to the server. <br>
+ * This event is fired via {@link ForgeEventFactory#onClientSendMessage(String)},
+ * which is executed by {@link GuiScreen#sendChatMessage(String, boolean)}<br>
+ * <br>
+ * {@link #message} contains the message that will be sent to the server. This can be changed by mods.<br>
+ * {@link #originalMessage} contains the original message that was going to be sent to the server. This cannot be changed by mods.<br>
+ * <br>
+ * This event is {@link Cancelable}. <br>
+ * If this event is canceled, the chat message or command is never sent to the server.<br>
+ * <br>
+ * This event does not have a result. {@link HasResult}<br>
+ * <br>
+ * This event is fired on the {@link MinecraftForge#EVENT_BUS}.
+ **/
+@Cancelable
+public class ClientChatEvent extends Event
+{
+    private String message;
+    private final String originalMessage;
+    public ClientChatEvent(String message)
+    {
+        this.setMessage(message);
+        this.originalMessage = Strings.nullToEmpty(message);
+    }
+
+    public String getMessage()
+    {
+        return message;
+    }
+
+    public void setMessage(String message)
+    {
+        this.message = Strings.nullToEmpty(message);
+    }
+
+    public String getOriginalMessage()
+    {
+        return originalMessage;
+    }
+}

src/main/java/net/minecraftforge/event/ForgeEventFactory.java

@@ -64,6 +64,7 @@ import net.minecraft.world.chunk.IChunkGenerator;
 import net.minecraft.world.storage.IPlayerFileData;
 import net.minecraft.world.storage.SaveHandler;
 import net.minecraft.world.storage.loot.LootTable;
+import net.minecraftforge.client.event.ClientChatEvent;
 import net.minecraftforge.client.event.ClientChatReceivedEvent;
 import net.minecraftforge.client.event.RenderBlockOverlayEvent;
 import net.minecraftforge.client.event.RenderBlockOverlayEvent.OverlayType;
@@ -340,6 +341,13 @@ public class ForgeEventFactory
         return MinecraftForge.EVENT_BUS.post(event) ? null : event.getMessage();
     }
 
+    @Nonnull
+    public static String onClientSendMessage(String message)
+    {
+        ClientChatEvent event = new ClientChatEvent(message);
+        return MinecraftForge.EVENT_BUS.post(event) ? "" : event.getMessage();
+    }
+
     public static int onHoeUse(ItemStack stack, EntityPlayer player, World worldIn, BlockPos pos)
     {
         UseHoeEvent event = new UseHoeEvent(player, stack, worldIn, pos);

src/test/java/net/minecraftforge/test/ClientChatEventTest.java

@@ -0,0 +1,27 @@
+package net.minecraftforge.test;
+
+import net.minecraftforge.client.event.ClientChatEvent;
+import net.minecraftforge.common.MinecraftForge;
+import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.common.Mod.EventHandler;
+import net.minecraftforge.fml.common.event.FMLInitializationEvent;
+import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+
+@Mod(modid="clientchateventtest", name="Client Chat Event Test", version="0.0.0", acceptableRemoteVersions = "*")
+public class ClientChatEventTest {
+
+    @EventHandler
+    public void init(FMLInitializationEvent event)
+    {
+        MinecraftForge.EVENT_BUS.register(this);
+    }
+
+    @SubscribeEvent
+    public void onPlayerAttemptChat(ClientChatEvent event)
+    {
+        if(event.getMessage().equals("Cancel"))
+            event.setCanceled(true);
+        else if(event.getMessage().equals("Replace this text"))
+            event.setMessage("Text replaced.");
+    }
+}