Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-4457181

Unicode Combining Diacritics are not rendered

    XMLWordPrintable

    Details

    • Subcomponent:
      2d
    • Resolved In Build:
      b03
    • CPU:
      generic, x86
    • OS:
      generic, windows_xp
    • Verification:
      Not verified

      Backports

        Description

        Name: bsC130419 Date: 05/10/2001


        java version "1.3.0"
        Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
        Java HotSpot(TM) Client VM (build 1.3.0-C, mixed mode)



        package mpi.alt;
        /**
           <pre>
           This test report against Java 1.3 covers one major bug:
           (major bug) Java fails to render combining diacritics.
           (minor bug) java.awt.TextArea.setFont() fails under Windows.
           Combining diacritics are rendered upon the preceding character.
           The combining diacritic choosen is the 'umlaut'.
           The choosen text are the two characters 'a umlaut' and 'u'.
           After an equal sign, the same two characters are shown using precomposed
        characters.
           
           The program opens an AWT and a Swing window for each font that claims to
        render the
           text.
           The display will fail depending on the operating system, the font and the
        GUI.
           The result table is:
           
                        | Java | font | AWT | Swing
           -------------+----------+------------+--------------+--------
           Windows 2000 | 1.3.0-C | AUMS | font not set | ok
           Windows 2000 | 1.3.0-C | LSU | font not set | ok
           Windows NT | 1.3.0-C | AUMS | font not set | ok
           Windows NT | 1.3.0-C | LSU | font not set | ok
           Windows 98 | 1.3.0-C | AUMS | font not set | after full
           Windows 98 | 1.3.0-C | LSU | font not set | ok
           SunOS 5.7 | 1.3.0_02 | Dialog | after null | after null
           SunOS 5.7 | 1.3.0_02 | Serif | after null | after null
           MacOS 10.0.2 | 1.3.0 | Geneva | ok | after full
           MacOS 10.0.2 | 1.3.0 | Helvetica | ok | after full
           MacOS 10.0.2 | 1.3.0 | Chicago | ok | after full
           MacOS 10.0.2 | 1.3.0 | Didot | ok | after zero
           
          /Font Legend/
           AUMS = Arial Unicode MS
           LSU = Lucida Sans Unicode
          /Error Legend/
           font not set = some default font is used, which fails to the render.
           after full = diacritic is rendered as an wide character on its own.
           after zero = diacritic has zero width, but still follows preceding
        character.
           after null = diacritic is not shown at all, but a space is used for that.

           
           Java is not able to render the combining diacritic in most of the cases.

           
           Influence on our work:
           It is absolutely essential for us to use combining diacritics
           because there are characters that do not exist as precomposed characters,
           in the IPA range for example.
           Changes must be made to Java. We cannot accept this situation.
           
           
          Related Bugs:
           (major bug)
             http://developer.java.sun.com/developer/bugParade/bugs/4157067.html
             This bug against Java 1.2 is very similar, but closed because it is said to
             be not reproducable.
           (minor bug)
             http://developer.java.sun.com/developer/bugParade/bugs/4369512.html
             This bug against Java 1.3 is open.

        </pre>
        @version $Header:
        /data/hsm-archive/eudico/cvs-repository/mpi/alt/CombiningDiacriticsTest.java,v
        1.13 2001/05/03 15:44:30 markra Exp $

        */

        import java.util.Vector;
        import java.awt.Font;
        import java.awt.GraphicsEnvironment;
        import java.awt.Frame;
        import java.awt.TextArea;
        import javax.swing.JFrame;
        import javax.swing.JTextArea;

        import java.awt.*;
        import javax.swing.*;
        import javax.swing.JButton;
        import java.awt.event.ActionListener;
        import java.awt.event.ActionEvent;
        /*
          The class has two parts:
          (part 1)
            Look up a font that claims to display the whole text.
          (part 2)
            Display the two characters using swing and awt only.
          Leave the application by killing it with ^C
         */
        public class CombiningDiacriticsTest {

        char a = '\u0061';
        char umlaut = '\u0308';
        char aumlaut = '\u00E4';
        char u = '\u0075';
        String text1 = "" + a + umlaut + u + " = " + aumlaut + u;
        Vector fontVector = new Vector();
        int openFonts = 0;

        ActionListener comboListener = new ActionListener() {
                    public void actionPerformed(ActionEvent e) {
                        JComboBox cb = (JComboBox)e.getSource();
                        String fontName = (String)cb.getSelectedItem();
        Font font = new Font(fontName, Font.PLAIN, 18);
        openWindows(font);

                    }
        };

        // Init and Setup the Font chooser dialog
        public CombiningDiacriticsTest() throws Exception{
        findFonts();
        JFrame mainFrame = new JFrame("Select Font");
        String[] fontArray = new String[fontVector.size()];
        for (int i=0; i<fontVector.size(); i++) {
        String fontname = (String)fontVector.elementAt(i);
        fontArray[i] = fontname;
        }
                JComboBox fontList = new JComboBox(fontArray);
                fontList.addActionListener(comboListener);
        mainFrame.getContentPane().add(fontList);
        mainFrame.setLocation(5, 50);
        mainFrame.pack();
        mainFrame.setVisible(true);
        }

        // Java 1.3 comes with no font to display Unicode with.
        private void findFonts() {
        GraphicsEnvironment ge =
        GraphicsEnvironment.getLocalGraphicsEnvironment();
        String fontList[] = ge.getAvailableFontFamilyNames();
        boolean appropriate = false;
        {
        int i = 0;
        while (i < fontList.length) {
        String fontname = fontList[i];
        Font font = new Font(fontname, Font.PLAIN,
        18);
        // note: documentation on canDisplayUpTo() is
        wrong in 1.2 and 1.3.
        //
        http://developer.java.sun.com/developer/bugParade/bugs/4340793.html
        appropriate = font.canDisplayUpTo(this.text1) ==
        this.text1.length();
        if (appropriate) {
        this.fontVector.add(fontList[i]);
        }
        i++;
        }
        }
        }

        // Arange the output
        private void openWindows(Font font) {
        int yDiff = 90;
        // awt
        TextArea textArea2 = new TextArea();
        textArea2.setFont(font); // has no effect on Windows NT!
        textArea2.setRows(1);
        textArea2.setColumns(25);
        textArea2.append(text1);

        Frame frame = new Frame("AWT: " + font.getName());
        frame.add(textArea2);
        frame.setLocation(10, 200+yDiff*this.openFonts);
        frame.pack();
        frame.setVisible(true);

        // swing
        JTextArea jTextArea2 = new JTextArea();
        jTextArea2.setFont(font);
        jTextArea2.setRows(1);
        jTextArea2.setColumns(25); // has no effect on Windows NT!
        jTextArea2.append(text1);

        JFrame jFrame = new JFrame("Swing: " + font.getName());
        jFrame.getContentPane().add(jTextArea2);
        jFrame.setLocation(400, 200+yDiff*this.openFonts);
        jFrame.pack();
        jFrame.setVisible(true);

        this.openFonts++;
        }



        static public void main(String[] argv) throws Exception {
        new CombiningDiacriticsTest();
        }




        }
        (Review ID: 123716)
        ======================================================================

          Attachments

            Issue Links

              Activity

                People

                Assignee:
                prr Philip Race
                Reporter:
                bstrathesunw Bill Strathearn (Inactive)
                Votes:
                0 Vote for this issue
                Watchers:
                0 Start watching this issue

                  Dates

                  Created:
                  Updated:
                  Resolved:
                  Imported:
                  Indexed: