Display empty message when loading 1.13 forge version list

HMCL/src/main/java/org/jackhuang/hmcl/ui/download/VersionsPage.java

@@ -47,6 +47,7 @@ public final class VersionsPage extends StackPane implements WizardPage, Refresh
     private final DownloadProvider downloadProvider;
     private final String libraryId;
     private final String title;
+    private final Runnable callback;
 
     @FXML
     private JFXListView<VersionsPageItem> list;
@@ -55,6 +56,8 @@ public final class VersionsPage extends StackPane implements WizardPage, Refresh
     @FXML
     private StackPane failedPane;
     @FXML
+    private StackPane emptyPane;
+    @FXML
     private JFXCheckBox chkRelease;
     @FXML
     private JFXCheckBox chkSnapshot;
@@ -74,6 +77,7 @@ public final class VersionsPage extends StackPane implements WizardPage, Refresh
         this.gameVersion = gameVersion;
         this.downloadProvider = downloadProvider;
         this.libraryId = libraryId;
+        this.callback = callback;
         this.versionList = downloadProvider.getVersionListById(libraryId);
 
         FXUtils.loadFXML(this, "/assets/fxml/download/versions.fxml");
@@ -123,8 +127,12 @@ public final class VersionsPage extends StackPane implements WizardPage, Refresh
                 List<VersionsPageItem> items = loadVersions();
 
                 Platform.runLater(() -> {
-                    list.getItems().setAll(items);
+                    if (items.isEmpty()) {
-                    transitionHandler.setContent(centrePane, ContainerAnimations.FADE.getAnimationProducer());
+                        transitionHandler.setContent(emptyPane, ContainerAnimations.FADE.getAnimationProducer());
+                    } else {
+                        list.getItems().setAll(items);
+                        transitionHandler.setContent(centrePane, ContainerAnimations.FADE.getAnimationProducer());
+                    }
                 });
             } else {
                 Platform.runLater(() -> {
@@ -150,4 +158,7 @@ public final class VersionsPage extends StackPane implements WizardPage, Refresh
     private void onRefresh() {
         refresh();
     }
+
+    @FXML
+    private void onBack() { callback.run(); }
 }

HMCL/src/main/resources/assets/fxml/download/versions.fxml

@@ -20,4 +20,7 @@
     <StackPane fx:id="failedPane">
         <Label onMouseClicked="#onRefresh" style="-fx-text-fill: #0079FF; -fx-font-size: 20;" text="%download.failed.refresh" />
     </StackPane>
+    <StackPane fx:id="emptyPane">
+        <Label onMouseClicked="#onBack" style="-fx-text-fill: #0079FF; -fx-font-size: 20;" text="%download.failed.empty" />
+    </StackPane>
 </fx:root>

HMCL/src/main/resources/assets/lang/I18N.properties

@@ -83,6 +83,7 @@ crash.user_fault=Your OS or Java environment may not be properly installed resul
 download=Download
 download.BMCL=BMCLAPI (bangbang93, https://bmclapi2.bangbang93.com/)
 download.failed=Failed to download
+download.failed.empty=No candidates. Click here to return.
 download.failed.refresh=Unable to load version list. Click here to retry.
 download.mojang=Mojang
 

HMCL/src/main/resources/assets/lang/I18N_zh.properties

@@ -83,6 +83,7 @@ crash.user_fault=您的系統或 Java 環境可能安裝不當導致本軟件崩
 download=下載
 download.BMCL=BMCLAPI（bangbang93，https://bmclapi2.bangbang93.com/）
 download.failed=下載失敗
+download.failed.empty=沒有可供安裝的版本，點擊此處返回。
 download.failed.refresh=加載版本列表失敗，點擊此處重試。
 download.mojang=官方
 

HMCL/src/main/resources/assets/lang/I18N_zh_CN.properties

@@ -83,6 +83,7 @@ crash.user_fault=您的系统或 Java 环境可能安装不当导致本软件崩
 download=下载
 download.BMCL=BMCLAPI（bangbang93，https://bmclapi2.bangbang93.com/）
 download.failed=下载失败
+download.failed.empty=没有可供安装的版本，点击此处返回。
 download.failed.refresh=加载版本列表失败，点击此处重试。
 download.mojang=官方
 

HMCLCore/src/main/java/org/jackhuang/hmcl/download/VersionList.java

@@ -73,8 +73,7 @@ public abstract class VersionList<T extends RemoteVersion> {
     private Collection<T> getVersionsImpl(String gameVersion) {
         lock.readLock().lock();
         try {
-            Collection<T> ans = versions.get(gameVersion);
+            return versions.get(gameVersion);
-            return ans.isEmpty() ? versions.values() : ans;
         } finally {
             lock.readLock().unlock();
         }