记事本添加 Tab 页支持，右键单击 Tab 页可切换自动换行

Author: yiding-he

src/main/java/com/xwintop/xJavaFxTool/controller/NotepadController.java

@@ -1,9 +1,78 @@
 package com.xwintop.xJavaFxTool.controller;
 
+import com.xwintop.xJavaFxTool.utils.NodeUtils;
 import com.xwintop.xJavaFxTool.view.NotepadView;
+import java.io.IOException;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Node;
+import javafx.scene.control.CheckMenuItem;
+import javafx.scene.control.ContextMenu;
+import javafx.scene.control.Tab;
+import javafx.scene.control.TextArea;
+import lombok.extern.slf4j.Slf4j;
 
+@Slf4j
 public class NotepadController extends NotepadView {
 
+    private int counter = 0;
+
     public void initialize() {
+        tabPane.getSelectionModel().selectedIndexProperty().addListener(((observable, oldValue, newValue) -> {
+            int index = newValue.intValue();
+            if (index + 1 == tabPane.getTabs().size()) {
+                tabPane.getTabs().add(index, createTab());
+                tabPane.getSelectionModel().select(index);
+            }
+        }));
+
+        Tab firstTab = tabPane.getTabs().get(0);
+        setupTab(firstTab, firstTab.getContent());
+    }
+
+    private Tab createTab() {
+        counter += 1;
+        Tab tab = new Tab("未命名" + counter);
+
+        try {
+            Node content = FXMLLoader.load(NotepadController.class
+                .getResource("/com/xwintop/xJavaFxTool/fxmlView/notepad-tab.fxml")
+            );
+
+            setupTab(tab, content);
+
+            tab.setContent(content);
+        } catch (IOException e) {
+            log.error("读取 FXML 失败", e);
+        }
+        return tab;
+    }
+
+    private void setupTab(Tab tab, Node content) {
+
+        TextArea textArea = (TextArea) content.lookup(".text-area");
+        if (textArea != null) {
+            NodeUtils.setUserData(textArea, "id", counter);
+            textArea.textProperty().addListener((_ob, _old, _new) -> {
+                if (_new.trim().length() == 0) {
+                    tab.setText("未命名" + NodeUtils.getUserData(textArea, "id"));
+                } else if (_new.contains("\n")) {
+                    tab.setText(_new.substring(0, _new.indexOf("\n")));
+                } else {
+                    tab.setText(_new);
+                }
+            });
+        }
+
+        tab.setContextMenu(new ContextMenu(
+            wrapTextMenuItem(textArea)
+        ));
+    }
+
+    private CheckMenuItem wrapTextMenuItem(TextArea textArea) {
+        CheckMenuItem menuItem = new CheckMenuItem("自动换行");
+        if (textArea != null) {
+            menuItem.setOnAction(event -> textArea.setWrapText(menuItem.isSelected()));
+        }
+        return menuItem;
     }
 }

src/main/java/com/xwintop/xJavaFxTool/utils/NodeUtils.java

@@ -0,0 +1,24 @@
+package com.xwintop.xJavaFxTool.utils;
+
+import java.util.HashMap;
+import java.util.Map;
+import javafx.scene.Node;
+
+@SuppressWarnings("unchecked")
+public class NodeUtils {
+
+    public static <T> T getUserData(Node node, String key) {
+        return node.getUserData() == null ? null :
+            !(node.getUserData() instanceof Map) ? null :
+                (T) ((Map<String, Object>) node.getUserData()).get(key);
+    }
+
+    public static void setUserData(Node node, String key, Object value) {
+        Map<String, Object> map = (Map<String, Object>) node.getUserData();
+        if (map == null) {
+            map = new HashMap<>();
+            node.setUserData(map);
+        }
+        map.put(key, value);
+    }
+}

src/main/java/com/xwintop/xJavaFxTool/view/NotepadView.java

@@ -1,10 +1,10 @@
 package com.xwintop.xJavaFxTool.view;
 
 import javafx.fxml.FXML;
-import javafx.scene.control.TextArea;
+import javafx.scene.control.TabPane;
 
 public abstract class NotepadView {
 
     @FXML
-    protected TextArea textArea;
+    protected TabPane tabPane;
 }

src/main/resources/com/xwintop/xJavaFxTool/fxmlView/notepad-tab.fxml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import javafx.scene.control.TextArea?>
+<?import javafx.scene.layout.VBox?>
+<VBox style="-fx-padding: 5">
+    <TextArea VBox.vgrow="ALWAYS"
+        style="-fx-font-size: 13; -fx-font-family: 'Fira Code', 'Consolas', monospace, 'Microsoft YaHei', sans-serif;-fx-border-color: #888888"/>
+</VBox>
+

src/main/resources/com/xwintop/xJavaFxTool/fxmlView/notepad.fxml

@@ -1,18 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
-<?import javafx.geometry.Insets?>
-<?import javafx.scene.control.TextArea?>
+<?import javafx.scene.control.Tab?>
+<?import javafx.scene.control.TabPane?>
 <?import javafx.scene.layout.BorderPane?>
 <BorderPane xmlns="http://javafx.com/javafx"
     xmlns:fx="http://javafx.com/fxml"
     fx:controller="com.xwintop.xJavaFxTool.controller.NotepadController">
-
-    <padding>
-        <Insets topRightBottomLeft="5"/>
-    </padding>
-
     <center>
-        <TextArea fx:id="textArea"
-            style="-fx-font-family:'Fira Code',Consolas,monospace,sans-serif;-fx-font-size:13;-fx-border-color:#888888"/>
+        <TabPane tabMaxWidth="200" tabClosingPolicy="ALL_TABS" fx:id="tabPane">
+            <Tab text="未命名" closable="false">
+                <fx:include source="notepad-tab.fxml"/>
+            </Tab>
+            <Tab text="+" closable="false"/>
+        </TabPane>
     </center>
 </BorderPane>