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From "Alexey A. Ivanov (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-1028) [classlib][text] Bidi returns directional runs in visual order as opposed to logical.
Date Tue, 01 Aug 2006 11:03:18 GMT
[classlib][text] Bidi returns directional runs in visual order as opposed to logical.
-------------------------------------------------------------------------------------

                 Key: HARMONY-1028
                 URL: http://issues.apache.org/jira/browse/HARMONY-1028
             Project: Harmony
          Issue Type: Bug
          Components: Classlib
            Reporter: Alexey A. Ivanov


java.text.Bidi returns directional runs (getRunStart(), getRunLimit(), getRunLevel()) in visual
order if paragraph reading order is Right-to-Left (I mean the first run is at the end of character
buffer, and the last is at the beginning).

Consider the following test case:
import java.text.Bidi;

public class Test {
    public static final String LTR = "\u0061\u0062";
    public static final String RTL = "\u05DC\u05DD";
    public static final String newLine = "\n";

    public static final String defText = LTR + newLine
                                         + RTL + LTR + RTL;
    public static void main(String[] args) {
        Bidi bi = new Bidi(defText,
                           Bidi.DIRECTION_DEFAULT_LEFT_TO_RIGHT);
        
        System.out.println("Runs: ");
        final int count = bi.getRunCount();
        for (int i = 0; i < count; i++) {
            System.out.println(i + ": " + bi.getRunLevel(i)
                               + " [" + bi.getRunStart(i)
                               + ", " + bi.getRunLimit(i)
                               + "]");
        }
    }
}


The output on Harmony:
Runs: 
0: 0 [0, 3]
1: 1 [7, 9]
2: 2 [5, 7]
3: 1 [3, 5]


The output on the RI:
0: 0 [0, 3]
1: 1 [3, 5]
2: 0 [5, 7]
3: 1 [7, 9]


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