Expand GuiModConfig to allow it to be mixed up with custom GUIs.

Author: Fox2Code

loader/src/main/java/com/fox2code/foxloader/client/gui/GuiModConfig.java

@@ -51,6 +51,26 @@ public GuiModConfig(GuiScreen parentScreen, ModContainer modContainer, Object ro
                 rootInstance.getClass(), modContainer).rootConfigMenu, rootInstance, rootInstance);
     }
 
+    public GuiModConfig(GuiScreen parentScreen, ModContainer modContainer, Object rootInstance, String path) {
+        ConfigStructure configStructure = ConfigStructure.parseFromClass(rootInstance.getClass(), modContainer);
+        ConfigMenu configMenu = configStructure.getInstanceConfigMenu(path);
+        if (configMenu == null) {
+            throw new IllegalArgumentException(
+                    "Config object: \"" + configStructure.getConfigClassName() +
+                    "\" does not have a config menu for \"" + path + "\"");
+        }
+        Object curInstance = configStructure.getInstanceConfigKey(rootInstance, path);
+        if (curInstance == null) {
+            throw new IllegalArgumentException(
+                    "Cannot open a config menu for a null object.");
+        }
+        this.parentScreen = parentScreen;
+        this.modContainer = modContainer;
+        this.configMenu = configMenu;
+        this.rootInstance = rootInstance;
+        this.curInstance = curInstance;
+    }
+
     private GuiModConfig(GuiScreen parentScreen, ModContainer modContainer, ConfigMenu configMenu,
                          Object rootInstance, Object curInstance) {
         this.parentScreen = parentScreen;

loader/src/main/java/com/fox2code/foxloader/config/ConfigStructure.java

@@ -202,6 +202,21 @@ private ConfigStructure(Map<String, ConfigKey> configKeyMap, ConfigMenu rootConf
         this.modId = modId;
     }
 
+    public ConfigMenu getInstanceConfigMenu(String path) {
+        ConfigKey configKey = this.configKeyMap.get(path);
+        return configKey == null ? null : configKey.configMenu;
+    }
+
+    public Object getInstanceConfigKey(Object configObject, String path) {
+        Objects.requireNonNull(configObject);
+        this.cls.cast(configObject);
+        if (path.isEmpty()) {
+            return configObject;
+        }
+        ConfigKey configKey = this.configKeyMap.get(path);
+        return Internal.getInstanceConfigKeyImpl(configObject, configKey);
+    }
+
     public void loadJsonConfig(ObjectElement jsonObject, Object config) {
         this.cls.cast(config); // Verify input type
         for (ConfigKey configKey : this.configKeyMap.values()) {
@@ -315,6 +330,10 @@ private static void setElementJsonObject(
         }
     }
 
+    public String getConfigClassName() {
+        return this.cls.getName();
+    }
+
     public static class Internal {
         public static Object getInstanceConfigKeyImpl(Object instance, ConfigKey configKey) {
             if (instance == null) return null;