feat: allow switching locale using a registry option

Author: lppedd

src/main/kotlin/com/github/lppedd/cc/CC.kt

@@ -23,6 +23,7 @@ public object CC {
   }
 
   public object Registry {
+    public const val Locale: String = "com.github.lppedd.cc.locale"
     public const val VcsEnabled: String = "com.github.lppedd.cc.providers.vcs"
   }
 

src/main/kotlin/com/github/lppedd/cc/CCBundle.kt

@@ -14,6 +14,7 @@ public object CCBundle {
   private const val BUNDLE = "messages.ConventionalCommitBundle"
 
   private var bundleReference: Reference<ResourceBundle>? = null
+  private var bundleLocale: Locale? = null
   private val bundle: ResourceBundle
     get() = derefBundle()
 
@@ -25,11 +26,17 @@ public object CCBundle {
   public fun getOrDefault(@PropertyKey(resourceBundle = BUNDLE) key: String, defaultValue: String, vararg params: Any): String =
     BundleBase.messageOrDefault(bundle, key, defaultValue, *params)
 
+  @JvmStatic
+  public fun setLocale(locale: Locale) {
+    bundleReference = null
+    bundleLocale = locale
+  }
+
   private fun derefBundle(): ResourceBundle {
     var ref = SoftReference.dereference(bundleReference)
 
     if (ref == null) {
-      ref = ResourceBundle.getBundle(BUNDLE)
+      ref = ResourceBundle.getBundle(BUNDLE, bundleLocale ?: CCRegistry.getLocale())
       bundleReference = JavaSoftReference(ref)
     }
 

src/main/kotlin/com/github/lppedd/cc/CCRegistry.kt

@@ -0,0 +1,21 @@
+package com.github.lppedd.cc
+
+import com.intellij.openapi.util.registry.Registry
+import java.util.*
+
+/**
+ * @author Edoardo Luppi
+ */
+internal object CCRegistry {
+  /**
+   * Returns the locale used by the plugin UI.
+   */
+  fun getLocale(): Locale {
+    val value = Registry.get(CC.Registry.Locale)
+    return when (value.selectedOption) {
+      "English (en_US)" -> Locale.ENGLISH
+      "Chinese (zh_CN)" -> Locale.SIMPLIFIED_CHINESE
+      else -> Locale.getDefault()
+    }
+  }
+}

src/main/kotlin/com/github/lppedd/cc/CCRegistryValueListener.kt

@@ -0,0 +1,16 @@
+package com.github.lppedd.cc
+
+import com.intellij.openapi.util.registry.RegistryValue
+import com.intellij.openapi.util.registry.RegistryValueListener
+
+/**
+ * @author Edoardo Luppi
+ */
+internal class CCRegistryValueListener : RegistryValueListener {
+  override fun afterValueChanged(value: RegistryValue) {
+    if (value.key == CC.Registry.Locale) {
+      val locale = CCRegistry.getLocale()
+      CCBundle.setLocale(locale)
+    }
+  }
+}

src/main/resources/META-INF/plugin.xml

@@ -18,6 +18,7 @@
 
   <applicationListeners>
     <listener topic="com.intellij.openapi.project.ProjectManagerListener" class="com.github.lppedd.cc.CCProjectManagerListener" />
+    <listener topic="com.intellij.openapi.util.registry.RegistryValueListener" class="com.github.lppedd.cc.CCRegistryValueListener" />
   </applicationListeners>
 
   <extensions defaultExtensionNs="com.intellij">
@@ -99,6 +100,11 @@
         key="cc.notification.group.name"
     />
 
+    <registryKey
+        key="com.github.lppedd.cc.locale"
+        description="Set the UI locale"
+        defaultValue="[Default*|English (en_US)|Chinese (zh_CN)]"
+    />
     <registryKey
         key="com.github.lppedd.cc.providers.vcs"
         description="Enable/disable the new VCS Provider"