REPORT-41895 设计面板-SQL输入框的光标，闪烁时会留下一个小点

【问题原因】光标的长度比背景高亮要长，超出部分不会闪烁，因此留下小点
【改动思路】减小光标的竖直height

designer-base/src/main/java/com/fr/design/gui/syntax/ui/rtextarea/ConfigurableCaret.java

@@ -2,7 +2,7 @@
  * 12/21/2004
  *
  * ConfigurableCaret.java - The caret used by RTextArea.
- * 
+ *
  * This library is distributed under a modified BSD license.  See the included
  * RSyntaxTextArea.License.txt file for details.
  */
@@ -159,7 +159,7 @@ public class ConfigurableCaret extends DefaultCaret {
 				textArea.isRequestFocusEnabled()) {
 			if (inWindow)
 				textArea.requestFocusInWindow();
-			else 
+			else
 				textArea.requestFocus();
 		}
 	}
@@ -458,7 +458,8 @@ public class ConfigurableCaret extends DefaultCaret {
 						Graphics2D g2 = (Graphics2D) g;
 						g2.setStroke(new BasicStroke(2));
 						// 向右再移动一个位置 避免光标太接近文字内容
-						g2.draw(new Line2D.Float(r.x + 1, r.y, r.x + 1, r.y + r.height));
+						// REPORT-41895 光标上方超出背景高亮的部分不会闪烁，会形成一个停留的小点，因此将光标的超出部分截去
+						g2.draw(new Line2D.Float(r.x + 1, r.y + 1, r.x + 1, r.y + r.height));
 						break;
 
 				} // End of switch (style).
@@ -676,7 +677,7 @@ public class ConfigurableCaret extends DefaultCaret {
 		            			if (line<lineCount) {
 		            				dot = textArea.getLineStartOffset(line);
 		            			}
-		            			else { // No lower lines visible 
+		            			else { // No lower lines visible
 		            				UIManager.getLookAndFeel().
 		            						provideErrorFeedback(textArea);
 		            				return;
@@ -711,4 +712,4 @@ public class ConfigurableCaret extends DefaultCaret {
 	}
 
 
-}
+}