Pull request #1748: REPORT-33690 UIManager中事件监听 没有正确的配对移除 导致内存泄露

Merge in DESIGN/design from ~HADES/design:release/10.0 to release/10.0

* commit 'f5a89c3de8635d6564d462ab21682c38296bef79':
  REPORT-33690 抽出方法
  REPORT-33690 UIManager中事件监听 没有正确的配对移除 导致内存泄露

designer-base/src/main/java/com/fr/design/javascript/JSContentPane.java

@@ -21,6 +21,8 @@ import com.fr.general.IOUtils;
 
 import javax.swing.*;
 import java.awt.*;
+import java.awt.event.FocusEvent;
+import java.awt.event.FocusListener;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.util.ArrayList;
@@ -82,6 +84,20 @@ public class JSContentPane extends BasicPane {
         UIScrollPane sp = new UIScrollPane(contentTextArea);
         this.add(sp, BorderLayout.CENTER);
 
+        contentTextArea.addFocusListener(new FocusListener() {
+            @Override
+            public void focusGained(FocusEvent e) {
+                // 获得焦点时 安装
+                installAutoCompletion();
+            }
+
+            @Override
+            public void focusLost(FocusEvent e) {
+                // 失去焦点时 卸载
+                uninstallAutoCompletion();
+            }
+        });
+
         UILabel funNameLabel2 = new UILabel();
         funNameLabel2.setText("}");
         this.add(funNameLabel2, BorderLayout.SOUTH);
@@ -91,12 +107,10 @@ public class JSContentPane extends BasicPane {
         return KeyStroke.getKeyStroke(ks.replace("+", "pressed"));
     }
 
-    @Override
-    protected String title4PopupWindow() {
-        return "JS";
-    }
-
-    public void populate(String js) {
+    /**
+     * 注册安装 自动补全监听
+     */
+    private void installAutoCompletion() {
         if (ac == null) {
             CompletionProvider provider = createCompletionProvider();
             ac = new AutoCompletion(provider);
@@ -105,16 +119,28 @@ public class JSContentPane extends BasicPane {
             ac.setTriggerKey(convert2KeyStroke(shortCuts));
             ac.install(contentTextArea);
         }
-
-        this.contentTextArea.setText(js);
     }
 
-    public String update() {
+    /**
+     * 卸载移除 自动补全监听
+     */
+    private void uninstallAutoCompletion() {
         if (ac != null) {
-            this.ac.uninstall();
+            ac.uninstall();
             ac = null;
         }
+    }
 
+    @Override
+    protected String title4PopupWindow() {
+        return "JS";
+    }
+
+    public void populate(String js) {
+        this.contentTextArea.setText(js);
+    }
+
+    public String update() {
         return this.contentTextArea.getText();
     }