Examples of java.text.Bidi

java.text.Bidi
This class implements the Unicode Bidirectional Algorithm.
A Bidi object provides information on the bidirectional reordering of the text used to create it. This is required, for example, to properly display Arabic or Hebrew text. These languages are inherently mixed directional, as they order numbers from left-to-right while ordering most other text from right-to-left.
Once created, a Bidi object can be queried to see if the text it represents is all left-to-right or all right-to-left. Such objects are very lightweight and this text is relatively easy to process.
If there are multiple runs of text, information about the runs can be accessed by indexing to get the start, limit, and level of a run. The level represents both the direction and the 'nesting level' of a directional run. Odd levels are right-to-left, while even levels are left-to-right. So for example level 0 represents left-to-right text, while level 1 represents right-to-left text, and level 2 represents left-to-right text embedded in a right-to-left run. @since 1.4

                                  text.offset + text.count)) {


            return false;
        }


        final Bidi bidi = new Bidi(text.array, text.offset, null, 0, text.count,
                                   getDefaultDirection(offset));


        if (hasBidiInfo && !bidi.isMixed()
            && isLeftToRight(offset) == bidi.isLeftToRight()) {


            return false;
        }


        if (!hasBidiInfo) {

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  /**
   * Apply Unicode Bidirectional Algorithm to string and return a new possibly reordered string for visual rendering.
   */
  private String bidiReorder(String par1Str) {
    if (par1Str != null && Bidi.requiresBidi(par1Str.toCharArray(), 0, par1Str.length())) {
      Bidi var2 = new Bidi(par1Str, -2);
      byte[] var3 = new byte[var2.getRunCount()];
      String[] var4 = new String[var3.length];
      int var7;


      for (int var5 = 0; var5 < var3.length; ++var5) {
        int var6 = var2.getRunStart(var5);
        var7 = var2.getRunLimit(var5);
        int var8 = var2.getRunLevel(var5);
        String var9 = par1Str.substring(var6, var7);
        var3[var5] = (byte)var8;
        var4[var5] = var9;
      }

View Full Code Here


        try {
            content.getChars(parStart, parLen, text);
        } catch (final BadLocationException e) { }


        Bidi bidi = new Bidi(text.array, text.offset, null, 0, text.count,
                             getDefaultDirection(par));


        final int runCount = bidi.getRunCount();
        for (int i = 0; i < runCount; i++) {
            int level = bidi.getRunLevel(i);


            if (i == 0 && added.size() > 0) {
                Element prevBidi = added.get(added.size() - 1);
                if (getBidiLevel(prevBidi) == level) {
                    added.remove(added.size() - 1);
                    added.add(new BidiElement(prevBidi.getAttributes(),
                                              prevBidi.getStartOffset(),
                                              parStart + bidi.getRunLimit(i)));
                    continue;
                }
            }


            added.add(
                new BidiElement(context.addAttribute(context.getEmptySet(),
                                                     StyleConstants.BidiLevel,
                                                     new Integer(level)),
                                parStart + bidi.getRunStart(i),
                                parStart + bidi.getRunLimit(i)));
        }


    }

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                                  text.offset + text.count)) {


            return false;
        }


        final Bidi bidi = new Bidi(text.array, text.offset, null, 0, text.count,
                                   getDefaultDirection(offset));


        if (hasBidiInfo && !bidi.isMixed()
            && isLeftToRight(offset) == bidi.isLeftToRight()) {


            return false;
        }


        if (!hasBidiInfo) {

View Full Code Here


        try {
            content.getChars(parStart, parLen, text);
        } catch (final BadLocationException e) { }


        Bidi bidi = new Bidi(text.array, text.offset, null, 0, text.count,
                             getDefaultDirection(par));


        final int runCount = bidi.getRunCount();
        for (int i = 0; i < runCount; i++) {
            int level = bidi.getRunLevel(i);


            if (i == 0 && added.size() > 0) {
                Element prevBidi = added.get(added.size() - 1);
                if (getBidiLevel(prevBidi) == level) {
                    added.remove(added.size() - 1);
                    added.add(new BidiElement(prevBidi.getAttributes(),
                                              prevBidi.getStartOffset(),
                                              parStart + bidi.getRunLimit(i)));
                    continue;
                }
            }


            added.add(
                new BidiElement(context.addAttribute(context.getEmptySet(),
                                                     StyleConstants.BidiLevel,
                                                     new Integer(level)),
                                parStart + bidi.getRunStart(i),
                                parStart + bidi.getRunLimit(i)));
        }


    }

View Full Code Here

                                  text.offset + text.count)) {


            return false;
        }


        final Bidi bidi = new Bidi(text.array, text.offset, null, 0, text.count,
                                   getDefaultDirection(offset));


        if (hasBidiInfo && !bidi.isMixed()
            && isLeftToRight(offset) == bidi.isLeftToRight()) {


            return false;
        }


        if (!hasBidiInfo) {

View Full Code Here

     */
    private String bidiReorder(String par1Str)
    {
        if (par1Str != null && Bidi.requiresBidi(par1Str.toCharArray(), 0, par1Str.length()))
        {
            Bidi bidi = new Bidi(par1Str, -2);
            byte[] abyte = new byte[bidi.getRunCount()];
            String[] astring = new String[abyte.length];
            int i;


            for (int j = 0; j < abyte.length; ++j)
            {
                int k = bidi.getRunStart(j);
                i = bidi.getRunLimit(j);
                int l = bidi.getRunLevel(j);
                String s1 = par1Str.substring(k, i);
                abyte[j] = (byte) l;
                astring[j] = s1;
            }

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    Direction dir = Direction.UNSPECIFIED;
    if (!ignoredir && hasDirection(element)) return getDirection(element);
    String text = element.getText();
    if (text != null) {
      AttributedString s = new AttributedString(text);
      Bidi bidi = new Bidi(s.getIterator());
      dir = (bidi.baseIsLeftToRight()) ? Direction.LTR : Direction.RTL;
    }
    return dir;
  }

View Full Code Here


      labelSize = 0;


      if (bidiRequired)
      {
        Bidi bidi = new Bidi(label,
            Bidi.DIRECTION_DEFAULT_LEFT_TO_RIGHT);


        int runCount = bidi.getRunCount();


        if (rtlGlyphVectors == null
            || rtlGlyphVectors.length != runCount)
        {
          rtlGlyphVectors = new GlyphVector[runCount];
        }


        for (int i = 0; i < bidi.getRunCount(); i++)
        {
          final String labelSection = label.substring(
              bidi.getRunStart(i), bidi.getRunLimit(i));
          rtlGlyphVectors[i] = font
              .layoutGlyphVector(mxCurveLabelShape.frc,
                  labelSection.toCharArray(), 0,
                  labelSection.length(),
                  Font.LAYOUT_RIGHT_TO_LEFT);

View Full Code Here

        if (par1Str == null || !Bidi.requiresBidi(par1Str.toCharArray(), 0, par1Str.length()))
        {
            return par1Str;
        }


        Bidi bidi = new Bidi(par1Str, -2);
        byte abyte0[] = new byte[bidi.getRunCount()];
        String as[] = new String[abyte0.length];


        for (int i = 0; i < abyte0.length; i++)
        {
            int j = bidi.getRunStart(i);
            int k = bidi.getRunLimit(i);
            int i1 = bidi.getRunLevel(i);
            String s = par1Str.substring(j, k);
            abyte0[i] = (byte)i1;
            as[i] = s;
        }

View Full Code Here

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