Add SafeStringConverter & Refactor font settings

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

@@ -33,7 +33,6 @@ import javafx.stage.Stage;
 import org.jackhuang.hmcl.event.Event;
 import org.jackhuang.hmcl.event.EventManager;
 import org.jackhuang.hmcl.game.LauncherHelper;
-import org.jackhuang.hmcl.setting.Settings;
 import org.jackhuang.hmcl.util.Lang;
 import org.jackhuang.hmcl.util.Log4jLevel;
 import org.jackhuang.hmcl.util.StringUtils;
@@ -176,7 +175,7 @@ public final class LogWindow extends Stage {
 
             engine = webView.getEngine();
             engine.loadContent(Lang.ignoringException(() -> IOUtils.readFullyAsString(getClass().getResourceAsStream("/assets/log-window-content.html")))
-                    .replace("${FONT}", Settings.instance().getFont().getSize() + "px \"" + Settings.instance().getFont().getFamily() + "\""));
+                    .replace("${FONT}", config().getFontSize() + "px \"" + config().getFontFamily() + "\""));
             engine.getLoadWorker().stateProperty().addListener((a, b, newValue) -> {
                 if (newValue == Worker.State.SUCCEEDED) {
                     document = engine.getDocument();

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

@@ -36,8 +36,8 @@ import org.jackhuang.hmcl.upgrade.RemoteVersion;
 import org.jackhuang.hmcl.upgrade.UpdateChannel;
 import org.jackhuang.hmcl.upgrade.UpdateChecker;
 import org.jackhuang.hmcl.upgrade.UpdateHandler;
-import org.jackhuang.hmcl.util.Lang;
 import org.jackhuang.hmcl.util.i18n.Locales;
+import org.jackhuang.hmcl.util.javafx.SafeStringConverter;
 
 import java.net.Proxy;
 import java.util.Arrays;
@@ -64,24 +64,19 @@ public final class SettingsPage extends SettingsView implements DecoratorPage {
         selectedItemPropertyFor(cboDownloadSource).bindBidirectional(config().downloadTypeProperty());
         // ====
 
-        cboFont.initValue(Settings.instance().getFont());
-        cboFont.valueProperty().addListener((a, b, newValue) -> {
-            Font font = Font.font(newValue, Settings.instance().getFont().getSize());
-            Settings.instance().setFont(font);
-            lblDisplay.setStyle("-fx-font: " + font.getSize() + " \"" + font.getFamily() + "\";");
-        });
+        // ==== Font ====
+        cboFont.valueProperty().bindBidirectional(config().fontFamilyProperty());
 
-        txtFontSize.setText(Double.toString(Settings.instance().getFont().getSize()));
-        txtFontSize.getValidators().add(new Validator(it -> Lang.toDoubleOrNull(it) != null));
-        txtFontSize.textProperty().addListener((a, b, newValue) -> {
-            if (txtFontSize.validate()) {
-                Font font = Font.font(Settings.instance().getFont().getFamily(), Double.parseDouble(newValue));
-                Settings.instance().setFont(font);
-                lblDisplay.setStyle("-fx-font: " + font.getSize() + " \"" + font.getFamily() + "\";");
-            }
-        });
+        txtFontSize.textProperty().bindBidirectional(config().fontSizeProperty(),
+                SafeStringConverter.fromFiniteDouble()
+                        .restrict(it -> it > 0)
+                        .fallbackTo(12.0)
+                        .asPredicate(Validator.addTo(txtFontSize)));
 
-        lblDisplay.setStyle("-fx-font: " + Settings.instance().getFont().getSize() + " \"" + Settings.instance().getFont().getFamily() + "\";");
+        lblDisplay.fontProperty().bind(Bindings.createObjectBinding(
+                () -> Font.font(config().getFontFamily(), config().getFontSize()),
+                config().fontFamilyProperty(), config().fontSizeProperty()));
+        // ====
 
         // ==== Languages ====
         cboLanguage.getItems().setAll(Locales.LOCALES);

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

@@ -17,20 +17,26 @@
  */
 package org.jackhuang.hmcl.ui.construct;
 
+import static javafx.collections.FXCollections.emptyObservableList;
+import static javafx.collections.FXCollections.observableList;
+import static javafx.collections.FXCollections.singletonObservableList;
+
+import org.jackhuang.hmcl.util.javafx.MultiStepBinding;
+
 import com.jfoenix.controls.JFXComboBox;
+
 import javafx.beans.NamedArg;
+import javafx.beans.binding.Bindings;
 import javafx.scene.control.ListCell;
 import javafx.scene.text.Font;
 
 public class FontComboBox extends JFXComboBox<String> {
+
     private boolean loaded = false;
 
     public FontComboBox(@NamedArg(value = "fontSize", defaultValue = "12.0") double fontSize,
                         @NamedArg(value = "enableStyle", defaultValue = "false") boolean enableStyle) {
-        valueProperty().addListener((a, b, newValue) -> {
-            if (enableStyle)
-                setStyle("-fx-font-family: \"" + newValue + "\";");
-        });
+        styleProperty().bind(Bindings.concat("-fx-font-family: \"", valueProperty(), "\""));
 
         setCellFactory(listView -> new ListCell<String>() {
             @Override
@@ -43,15 +49,15 @@ public class FontComboBox extends JFXComboBox<String> {
             }
         });
 
+        itemsProperty().bind(MultiStepBinding.of(valueProperty())
+                        .map(value -> value == null ? emptyObservableList() : singletonObservableList(value)));
+
         setOnMouseClicked(e -> {
-            if (loaded) return;
-            getItems().setAll(Font.getFamilies());
+            if (loaded)
+                return;
+            itemsProperty().unbind();
+            setItems(observableList(Font.getFamilies()));
             loaded = true;
         });
     }
-
-    public void initValue(Font font) {
-        getItems().setAll(font.getFamily());
-        getSelectionModel().select(font.getFamily());
-    }
 }

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

@@ -17,12 +17,37 @@
  */
 package org.jackhuang.hmcl.ui.construct;
 
+import com.jfoenix.controls.JFXTextField;
 import com.jfoenix.validation.base.ValidatorBase;
+
+import javafx.beans.InvalidationListener;
+import javafx.beans.WeakInvalidationListener;
 import javafx.scene.control.TextInputControl;
 
+import java.util.function.Consumer;
 import java.util.function.Predicate;
 
+import org.jackhuang.hmcl.util.javafx.SafeStringConverter;
+
 public final class Validator extends ValidatorBase {
+
+    public static Consumer<Predicate<String>> addTo(JFXTextField control) {
+        return addTo(control, null);
+    }
+
+    /**
+     * @see SafeStringConverter#asPredicate(Consumer)
+     */
+    public static Consumer<Predicate<String>> addTo(JFXTextField control, String message) {
+        return predicate -> {
+            Validator validator = new Validator(message, predicate);
+            InvalidationListener listener = any -> control.validate();
+            validator.getProperties().put(validator, listener);
+            control.textProperty().addListener(new WeakInvalidationListener(listener));
+            control.getValidators().add(validator);
+        };
+    }
+
     private final Predicate<String> validator;
 
     /**