Fix 1.13.1->1.13 inventory title regression

Fixes #375

common/src/main/java/com/viaversion/viabackwards/ViaBackwardsConfig.java

@@ -31,6 +31,7 @@ public class ViaBackwardsConfig extends Config implements com.viaversion.viaback
     private boolean addTeamColorToPrefix;
     private boolean fix1_13FacePlayer;
     private boolean alwaysShowOriginalMobName;
+    private boolean fix1_13FormattedInventoryTitles;
     private boolean handlePingsAsInvAcknowledgements;
 
     public ViaBackwardsConfig(File configFile) {
@@ -47,6 +48,7 @@ public class ViaBackwardsConfig extends Config implements com.viaversion.viaback
         addCustomEnchantsToLore = getBoolean("add-custom-enchants-into-lore", true);
         addTeamColorToPrefix = getBoolean("add-teamcolor-to-prefix", true);
         fix1_13FacePlayer = getBoolean("fix-1_13-face-player", false);
+        fix1_13FormattedInventoryTitles = getBoolean("fix-formatted-inventory-titles", true);
         alwaysShowOriginalMobName = getBoolean("always-show-original-mob-name", true);
         handlePingsAsInvAcknowledgements = getBoolean("handle-pings-as-inv-acknowledgements", false);
     }
@@ -66,6 +68,11 @@ public class ViaBackwardsConfig extends Config implements com.viaversion.viaback
         return fix1_13FacePlayer;
     }
 
+    @Override
+    public boolean fix1_13FormattedInventoryTitle() {
+        return fix1_13FormattedInventoryTitles;
+    }
+
     @Override
     public boolean alwaysShowOriginalMobName() {
         return alwaysShowOriginalMobName;

common/src/main/java/com/viaversion/viabackwards/api/ViaBackwardsConfig.java

@@ -40,6 +40,8 @@ public interface ViaBackwardsConfig {
      */
     boolean isFix1_13FacePlayer();
 
+    boolean fix1_13FormattedInventoryTitle();
+
     /**
      * Always shows the original mob's name instead of only when hovering over them with the cursor.
      *

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/data/BackwardsMappings.java

@@ -60,7 +60,7 @@ public class BackwardsMappings extends com.viaversion.viabackwards.api.data.Back
 
     // Has lots of compat layers, so we can't use the default Via method
     private static void mapIdentifiers(int[] output, JsonObject newIdentifiers, JsonObject oldIdentifiers, JsonObject mapping) {
-        Object2IntMap newIdentifierMap = MappingDataLoader.indexedObjectToMap(oldIdentifiers);
+        Object2IntMap<String> newIdentifierMap = MappingDataLoader.indexedObjectToMap(oldIdentifiers);
         for (Map.Entry<String, JsonElement> entry : newIdentifiers.entrySet()) {
             String key = entry.getValue().getAsString();
             int value = newIdentifierMap.getInt(key);

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_13to1_13_1/Protocol1_13To1_13_1.java

@@ -17,6 +17,7 @@
  */
 package com.viaversion.viabackwards.protocol.protocol1_13to1_13_1;
 
+import com.viaversion.viabackwards.ViaBackwards;
 import com.viaversion.viabackwards.api.BackwardsProtocol;
 import com.viaversion.viabackwards.api.data.BackwardsMappings;
 import com.viaversion.viabackwards.api.rewriters.TranslatableRewriter;
@@ -109,14 +110,21 @@ public class Protocol1_13To1_13_1 extends BackwardsProtocol<ClientboundPackets1_
                 map(Type.UNSIGNED_BYTE); // Id
                 map(Type.STRING); // Window Type
                 handler(wrapper -> {
-                    JsonElement title = wrapper.read(Type.COMPONENT);
+                    JsonElement title = wrapper.passthrough(Type.COMPONENT);
                     translatableRewriter.processText(title);
 
-                    // https://bugs.mojang.com/browse/MC-124543
-                    JsonObject legacyComponent = new JsonObject();
-                    legacyComponent.addProperty("text", ChatRewriter.jsonToLegacyText(title.toString()));
+                    if (ViaBackwards.getConfig().fix1_13FormattedInventoryTitle()) {
+                        if (title.isJsonObject() && title.getAsJsonObject().size() == 1
+                                && title.getAsJsonObject().has("translate")) {
+                            // Hotfix simple translatable components from being converted to legacy text
+                            return;
+                        }
 
-                    wrapper.write(Type.COMPONENT, legacyComponent);
+                        // https://bugs.mojang.com/browse/MC-124543
+                        JsonObject legacyComponent = new JsonObject();
+                        legacyComponent.addProperty("text", ChatRewriter.jsonToLegacyText(title.toString()));
+                        wrapper.set(Type.COMPONENT, 0, legacyComponent);
+                    }
                 });
             }
         });

common/src/main/resources/assets/viabackwards/config.yml

@@ -13,6 +13,10 @@ add-teamcolor-to-prefix: true
 # Converts the 1.13 face look-at packet for 1.12- players. Requires a bit of extra caching.
 fix-1_13-face-player: false
 #
+# Fixes 1.13 clients and lower not seeing color or formatting in inventory titles by converting them to legacy text.
+# If you have issues with translatable text being displayed wrongly, disable this.
+fix-formatted-inventory-titles: true
+#
 # Sends inventory acknowledgement packets to act as a replacement for ping packets for sub 1.17 clients.
 # This only takes effect for ids in the short range. Useful for anticheat compatibility.
 handle-pings-as-inv-acknowledgements: false