8147002: [macosx] Arabic character cannot be rendered on MacOS X

Reviewed-by: prr, pnarayanan, jdv
Contributed-by: sreeprakash.s@oracle.com

src/macosx/classes/sun/font/CFont.java

 /*
- * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -204,6 +204,10 @@ public final class CFont extends PhysicalFont implements FontSubstitution {
         ArrayList<String> listOfString = new ArrayList<String>();
         getCascadeList(nativeFontPtr, listOfString);
 
+        // add JRE "Lucida Sans Regular" to the cascade list to enable fallback
+        // to happen to this JRE font in case the intended glyph is missing in
+        // fonts provided in the CoreText provided cascaded list
+        listOfString.add("Lucida Sans Regular");
         FontManager fm = FontManagerFactory.getInstance();
         int numFonts = 1 + listOfString.size();
         PhysicalFont[] fonts = new PhysicalFont[numFonts];

test/java/awt/font/Fallback/MissingGlyphTest.java

+/*
+ * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+/*
+ * @test
+ * @bug 8147002
+ * @summary  Verifies if Arabic character alef is rendered in osx
+ * @run main/manual MissingGlyphTest
+ */
+import java.awt.Font;
+import java.awt.BorderLayout;
+import java.awt.Color;
+import java.awt.FlowLayout;
+import java.awt.Graphics;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import javax.swing.JButton;
+import javax.swing.JDialog;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+import javax.swing.JTextArea;
+import javax.swing.JComponent;
+import javax.swing.SwingUtilities;
+import javax.swing.WindowConstants;
+
+public class MissingGlyphTest {
+    private static Thread mainThread;
+    private static boolean testPassed;
+    private static boolean testGeneratedInterrupt;
+    private static JFrame frame;
+
+    public static void main(String[] args) throws Exception {
+        if (!System.getProperty("os.name").startsWith("Mac")) {
+            return;
+        }
+        SwingUtilities.invokeAndWait(() -> {
+            doTest(MissingGlyphTest::glyphTest);
+        });
+        mainThread = Thread.currentThread();
+        try {
+            Thread.sleep(180000);
+        } catch (InterruptedException e) {
+            if (!testPassed && testGeneratedInterrupt) {
+                throw new RuntimeException("Alef character is not rendered");
+            }
+        }
+        if (!testGeneratedInterrupt) {
+            throw new RuntimeException("user has not executed the test");
+        }
+    }
+
+    private static void glyphTest() {
+        frame = new JFrame("Test");
+        frame.add(new MyComponent());
+        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+        frame.setSize(200, 200);
+        frame.setLocationRelativeTo(null);
+        frame.setVisible(true);
+    }
+
+    public static synchronized void pass() {
+        testPassed = true;
+        testGeneratedInterrupt = true;
+        mainThread.interrupt();
+    }
+
+    public static synchronized void fail() {
+        testPassed = false;
+        testGeneratedInterrupt = true;
+        mainThread.interrupt();
+    }
+
+    private static void doTest(Runnable action) {
+        String description
+                = " The test is supposed to display arabic alef character.\n"
+                + " If it resembles like the one shown in\n "
+                + " www.fileformat.info/info/unicode/char/0627/index.htm\n "
+                + " in Italic style ,press PASS.\n"
+                + " If the glyph is not shown or empty rectangle is shown, press FAIL";
+
+        final JDialog dialog = new JDialog();
+        dialog.setTitle("printBannerTest");
+        JTextArea textArea = new JTextArea(description);
+        textArea.setEditable(false);
+        final JButton testButton = new JButton("Start Test");
+        final JButton passButton = new JButton("PASS");
+        passButton.setEnabled(false);
+        passButton.addActionListener((e) -> {
+            dialog.dispose();
+            frame.dispose();
+            pass();
+        });
+        final JButton failButton = new JButton("FAIL");
+        failButton.setEnabled(false);
+        failButton.addActionListener((e) -> {
+            dialog.dispose();
+            frame.dispose();
+            fail();
+        });
+        testButton.addActionListener((e) -> {
+            testButton.setEnabled(false);
+            action.run();
+            passButton.setEnabled(true);
+            failButton.setEnabled(true);
+        });
+        JPanel mainPanel = new JPanel(new BorderLayout());
+        mainPanel.add(textArea, BorderLayout.CENTER);
+        JPanel buttonPanel = new JPanel(new FlowLayout());
+        buttonPanel.add(testButton);
+        buttonPanel.add(passButton);
+        buttonPanel.add(failButton);
+        mainPanel.add(buttonPanel, BorderLayout.SOUTH);
+        dialog.add(mainPanel);
+        dialog.pack();
+        dialog.setVisible(true);
+        dialog.addWindowListener(new WindowAdapter() {
+           @Override
+            public void windowClosing(WindowEvent e) {
+                System.out.println("main dialog closing");
+                testGeneratedInterrupt = false;
+                mainThread.interrupt();
+            }
+        });
+    }
+}
+
+class MyComponent extends JComponent {
+    private final Font font = new Font("Menlo", Font.ITALIC, 100);
+    private final String text = "\u0627"; // Arabic letter alef
+
+    @Override
+    protected void paintComponent(Graphics g) {
+        if (font.canDisplayUpTo(text) == -1) {
+            g.setColor(Color.black);
+            g.setFont(font);
+            g.drawString(text, 70, 110);
+        }
+    }
+}
+
+
+
+