支持显示语言完整程度 & 清理未使用 i18n 键值

HMCL/build.gradle.kts

@@ -128,6 +128,7 @@ tasks.checkstyleMain {
 
 val addOpens = listOf(
     "java.base/java.lang",
+    "java.base/java.util",
     "java.base/java.lang.reflect",
     "java.base/jdk.internal.loader",
     "javafx.base/com.sun.javafx.binding",

HMCL/src/main/java/org/jackhuang/hmcl/Metadata.java

@@ -57,6 +57,7 @@ private Metadata() {
     public static final String CHANGELOG_URL = DOCS_URL + "/changelog/";
     public static final String EULA_URL = DOCS_URL + "/eula/hmcl.html";
     public static final String GROUPS_URL = "https://www.bilibili.com/opus/905435541874409529";
+    public static final String LOCALIZATION_URL = "https://github.com/HMCL-dev/HMCL/blob/main/docs/Localization.md";
 
     public static final String BUILD_CHANNEL = JarUtils.getAttribute("hmcl.version.type", "nightly");
     public static final String GITHUB_SHA = JarUtils.getAttribute("hmcl.version.hash", null);

HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/LineSelectButton.java

@@ -20,7 +20,10 @@
 import com.jfoenix.controls.JFXPopup;
 import javafx.beans.InvalidationListener;
 import javafx.beans.binding.Bindings;
-import javafx.beans.property.*;
+import javafx.beans.property.ListProperty;
+import javafx.beans.property.ObjectProperty;
+import javafx.beans.property.SimpleListProperty;
+import javafx.beans.property.SimpleObjectProperty;
 import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
 import javafx.css.PseudoClass;
@@ -189,6 +192,10 @@ public void setDescriptionConverter(Function<T, String> value) {
         descriptionConverterProperty().set(value);
     }
 
+    public void setNullSafeDescriptionConverter(Function<@NotNull T, String> value) {
+        descriptionConverterProperty().set(it -> it != null ? value.apply(it) : "");
+    }
+
     private final ListProperty<T> items = new SimpleListProperty<>(this, "items", FXCollections.emptyObservableList());
 
     public ListProperty<T> itemsProperty() {

HMCL/src/main/java/org/jackhuang/hmcl/ui/main/SettingsPage.java

@@ -173,19 +173,26 @@ protected int getTrailingTextIndex() {
                     chooseLanguagePane.setSubtitle(i18n("settings.take_effect_after_restart"));
 
                     SupportedLocale currentLocale = I18n.getLocale();
-                    chooseLanguagePane.setNullSafeConverter(locale -> {
+                    chooseLanguagePane.setNullSafeConverter(it -> it.getDisplayName(currentLocale));
+                    chooseLanguagePane.setNullSafeDescriptionConverter(locale -> {
                         if (locale.isDefault())
-                            return locale.getDisplayName(currentLocale);
-                        else if (locale.isSameLanguage(currentLocale))
-                            return locale.getDisplayName(locale);
-                        else
-                            return locale.getDisplayName(currentLocale) + " - " + locale.getDisplayName(locale);
+                            return "";
+
+                        String name = locale.getDisplayName(locale);
+
+                        double completeness = locale.getTranslationCompleteness();
+                        if (completeness != 0.0)
+                            return String.format("%s - %.2f%%", name, completeness * 100);
+                        else return name;
                     });
                     chooseLanguagePane.setItems(SupportedLocale.getSupportedLocales());
                     chooseLanguagePane.valueProperty().bindBidirectional(settings().languageProperty());
 
-                    languagePaneList.getContent().add(chooseLanguagePane);
+                    LineButton helpButton = LineButton.createExternalLinkButton(Metadata.LOCALIZATION_URL);
+                    helpButton.setTitle(i18n("settings.launcher.language.contribution.title"));
+                    helpButton.setSubtitle(i18n("settings.launcher.language.contribution.subtitle"));
 
+                    languagePaneList.getContent().addAll(chooseLanguagePane, helpButton);
                 }
 
                 rootPane.getChildren().addAll(ComponentList.createComponentListTitle(i18n("settings.launcher.language")), languagePaneList);

HMCL/src/main/java/org/jackhuang/hmcl/util/i18n/SupportedLocale.java

@@ -24,6 +24,7 @@
 import org.jackhuang.hmcl.util.StringUtils;
 import org.jackhuang.hmcl.util.gson.JsonUtils;
 import org.jackhuang.hmcl.util.i18n.translator.Translator;
+import org.jetbrains.annotations.Nullable;
 import org.jetbrains.annotations.PropertyKey;
 
 import java.io.IOException;
@@ -294,6 +295,49 @@ public Translator getTranslator() {
         return this.translator = new Translator(this);
     }
 
+    @Nullable
+    private static final MethodHandle METHOOD_LOOKUP_HANDLE_KEY_SET;
+
+    static {
+        MethodHandle methoodLookupHandleKeySet;
+        try {
+            methoodLookupHandleKeySet = MethodHandles.privateLookupIn(ResourceBundle.class, MethodHandles.lookup())
+                    .findVirtual(ResourceBundle.class, "handleKeySet", MethodType.methodType(Set.class));
+        } catch (NoSuchMethodException | IllegalAccessException e) {
+            LOG.warning("Failed to get private lookup for ResourceBundle", e);
+            methoodLookupHandleKeySet = null;
+        }
+        METHOOD_LOOKUP_HANDLE_KEY_SET = methoodLookupHandleKeySet;
+    }
+
+    public double getTranslationCompleteness() {
+        if (METHOOD_LOOKUP_HANDLE_KEY_SET == null) return 0.0;
+
+        ResourceBundle enBundle = SupportedLocale.getLocale(Locale.ENGLISH).getResourceBundle();
+        Set<String> enKeys = enBundle.keySet();
+        int totalKeys = enKeys.size();
+        if (totalKeys == 0) return 0.0;
+
+        ResourceBundle currentBundle = getResourceBundle();
+        Set<String> handleKeys;
+
+        try {
+            @SuppressWarnings("unchecked")
+            Set<String> keys = (Set<String>) METHOOD_LOOKUP_HANDLE_KEY_SET.invoke(currentBundle);
+            handleKeys = keys;
+        } catch (Throwable e) {
+            LOG.warning("Failed to get handle keys", e);
+            return 0.0;
+        }
+
+        long actualTranslatedCount = handleKeys.stream()
+                .filter(enKeys::contains)
+                .count();
+
+        double v = (double) actualTranslatedCount / totalKeys;
+        return Math.min(1.0, v);
+    }
+
     public boolean isSameLanguage(SupportedLocale other) {
         return LocaleUtils.getRootLanguage(this.getLocale())
                 .equals(LocaleUtils.getRootLanguage(other.getLocale()));