JRE-269 added regression (JLabel doesn't scale <code>text</code> HTML fragments.)

(cherry picked from commit 1f4ad38d23)
2025-12-06 09:29:38 +01:00 · 2018-11-23 16:49:36 +07:00
parent 03e8b654a5
commit 43f18a9559
1 changed files with 118 additions and 0 deletions
--- a/test/jdk/jb/javax/swing/JLabel/JLabel/JLabel269.java
+++ b/test/jdk/jb/javax/swing/JLabel/JLabel/JLabel269.java
@@ -0,0 +1,118 @@
+/*
+ * Copyright 2000-2017 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.Graphics;
+import java.awt.image.BufferedImage;
+import java.util.Arrays;
+import javax.swing.BoxLayout;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.plaf.FontUIResource;
+
+/* @test
+ * @summary regression test on JRE-269
+ * @run main/othervm -Djavax.swing.rebaseCssSizeMap=true JLabel269 -verbose
+ */
+public class JLabel269 {
+
+    private static boolean verbose = false;
+
+    static class JLabelTest extends JLabel {
+        JLabelTest(String label) {
+            super(label);
+        }
+
+        @Override
+        protected void paintComponent(Graphics g) {
+            g.setColor(Color.WHITE);
+            g.fillRect(0, 0, getWidth(), getHeight());
+            g.setColor(Color.BLACK);
+            super.paintComponent(g);
+        }
+    }
+
+    public static void main(String[] args) {
+
+        String labelText = "<html><body><code>A</code></body></html>";
+
+        verbose = Arrays.asList(args).contains("-verbose");
+
+        JFrame mainFrame = new JFrame();
+
+        JPanel container = new JPanel();
+        container.setLayout(new BoxLayout(container, BoxLayout.X_AXIS));
+
+        JPanel p1 = new JPanel();
+        JLabel l1 = new JLabelTest(labelText);
+        l1.setFont(new FontUIResource("Tahoma", Font.PLAIN, 36));
+        p1.add(l1);
+        container.add(p1);
+
+        JPanel p2 = new JPanel();
+        JLabel l2 = new JLabelTest(labelText);
+        l2.setFont(new FontUIResource("Tahoma", Font.PLAIN, 72));
+        p2.add(l2);
+        container.add(p2);
+
+        mainFrame.add(container);
+        mainFrame.pack();
+        mainFrame.setVisible(true);
+
+        BufferedImage bi = new BufferedImage(
+                l1.getWidth(), l1.getHeight(), BufferedImage.TYPE_INT_ARGB);
+        l1.paint(bi.getGraphics());
+        int height1 = maxCharHeight(bi, l1.getWidth(), l1.getHeight());
+
+        bi = new BufferedImage(
+                l2.getWidth(), l2.getHeight(), BufferedImage.TYPE_INT_ARGB);
+        l2.paint(bi.getGraphics());
+        int height2 = maxCharHeight(bi, l2.getWidth(), l2.getHeight());
+
+        mainFrame.dispose();
+
+        if (Math.abs(height2 - 2 * height1) > 2) {
+            throw new RuntimeException("Heights of \"<code>A</code>\" for 36pt and for 72pt "
+                    + "must differ by half (+/- 2pxs)");
+        }
+    }
+
+    private static int maxCharHeight(BufferedImage bufferedImage, int width, int height) {
+        int rgb;
+        int maxHeight = 0;
+        for (int col = 0; col < width; col++) {
+            for (int row = 0; row < height; row++) {
+                try {
+                    // remove transparance
+                    rgb = bufferedImage.getRGB(col, row) & 0x00FFFFFF;
+                } catch (ArrayIndexOutOfBoundsException e) {
+                    return maxHeight;
+                }
+
+                if (verbose)
+                    System.out.print((rgb == 0xFFFFFF) ? " ." : " X");
+
+                if (rgb != 0xFFFFFF && maxHeight < height - row)
+                    maxHeight = height - row;
+            }
+            if (verbose)
+                System.out.println("maxHeight=" + maxHeight);
+        }
+        return maxHeight;
+    }
+}