Package com.itextpdf.text.pdf.languages

Source Code of com.itextpdf.text.pdf.languages.BanglaGlyphRepositioner

/*
* $Id: FontsResourceAnchor.java 4784 2011-03-15 08:33:00Z blowagie $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2014 iText Group NV
* Authors: Bruno Lowagie, et al.
*
* This program is free software; you can redistribute it and/or modify
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* following permission added to Section 15 as permitted in Section 7(a):
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*
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package com.itextpdf.text.pdf.languages;

import java.util.Arrays;
import java.util.List;
import java.util.Map;

import com.itextpdf.text.pdf.Glyph;

/**
*
* @author <a href="mailto:paawak@gmail.com">Palash Ray</a>
*/
public class BanglaGlyphRepositioner extends IndicGlyphRepositioner {
 
  private static final String[] CHARCTERS_TO_BE_SHIFTED_LEFT_BY_1 = new String[] {
      "\u09BF", "\u09C7", "\u09C8"};
 
  private final Map<Integer, int[]> cmap31;
  private final Map<String, Glyph> glyphSubstitutionMap;

  public BanglaGlyphRepositioner(Map<Integer, int[]> cmap31, Map<String, Glyph> glyphSubstitutionMap) {
    this.cmap31 = cmap31;
    this.glyphSubstitutionMap = glyphSubstitutionMap;
  }
 
  @Override
  public void repositionGlyphs(List<Glyph> glyphList) {
   
    for (int i = 0; i < glyphList.size(); i++) {
      Glyph glyph = glyphList.get(i);
     
      if (glyph.chars.equals("\u09CB")) {
        handleOKaarAndOUKaar(i, glyphList, '\u09C7', '\u09BE');
      } else if (glyph.chars.equals("\u09CC")) {
        handleOKaarAndOUKaar(i, glyphList, '\u09C7', '\u09D7');
      }
    }
   
    super.repositionGlyphs(glyphList);
  }

  @Override
  public List<String> getCharactersToBeShiftedLeftByOnePosition() {
    return Arrays.asList(CHARCTERS_TO_BE_SHIFTED_LEFT_BY_1);
  }
 
  /**
   * This is a dirty hack to display O-Kar (\u09cb) and Ou-Kar (\u09cc). Since this spans before and after
   * a Byanjan Borno like Ka (\u0995), the O-kar is split into two characters: the E-Kar (\u09C7) and the A-Kar (\u09BE).
   * Similar the Ou-Kar is split into two characters: the E-Kar (\u09C7) and the char (\u09D7).
   *
   */
  private void handleOKaarAndOUKaar(int currentIndex, List<Glyph> glyphList, char first, char second) {
        Glyph g1 = getGlyph(first);
        Glyph g2 = getGlyph(second);
        glyphList.set(currentIndex, g1);
        glyphList.add(currentIndex + 1, g2);
  }
 
  private Glyph getGlyph(char c) {
   
    Glyph glyph = glyphSubstitutionMap.get(String.valueOf(c));
   
    if (glyph != null) {
      return glyph;
    }
   
    int[] metrics = cmap31.get(Integer.valueOf(c));
        int glyphCode = metrics[0];
        int glyphWidth = metrics[1];
        return new Glyph(glyphCode, glyphWidth, String.valueOf(c));
  }

}
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