/*
 *
 * This file is part of the iText (R) project.
    Copyright (c) 1998-2017 iText Group NV
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS
 *
 * This program 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 Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
package com.itextpdf.text.pdf;

import com.itextpdf.text.Chunk;
import com.itextpdf.text.Image;
import com.itextpdf.text.TabStop;
import com.itextpdf.text.Utilities;
import com.itextpdf.text.pdf.draw.DrawInterface;
import com.itextpdf.text.pdf.draw.LineSeparator;
import com.itextpdf.text.pdf.languages.ArabicLigaturizer;

import java.util.ArrayList;
import java.util.List;

/** Does all the line bidirectional processing with PdfChunk assembly.
 *
 * @author Paulo Soares
 */
public class BidiLine {

    protected int runDirection;
    protected int pieceSize = 256;
    protected char text[] = new char[pieceSize];
    protected PdfChunk detailChunks[] = new PdfChunk[pieceSize];
    protected int totalTextLength = 0;

    protected byte orderLevels[] = new byte[pieceSize];
    protected int indexChars[] = new int[pieceSize];

    protected ArrayList<PdfChunk> chunks = new ArrayList<PdfChunk>();
    protected int indexChunk = 0;
    protected int indexChunkChar = 0;
    protected int currentChar = 0;

    protected int storedRunDirection;
    protected char storedText[] = new char[0];
    protected PdfChunk storedDetailChunks[] = new PdfChunk[0];
    protected int storedTotalTextLength = 0;

    protected byte storedOrderLevels[] = new byte[0];
    protected int storedIndexChars[] = new int[0];

    protected int storedIndexChunk = 0;
    protected int storedIndexChunkChar = 0;
    protected int storedCurrentChar = 0;

    protected boolean isWordSplit = false;

    protected boolean shortStore;
//    protected ArabicShaping arabic = new ArabicShaping(ArabicShaping.LETTERS_SHAPE | ArabicShaping.LENGTH_GROW_SHRINK | ArabicShaping.TEXT_DIRECTION_LOGICAL);
    protected static final IntHashtable mirrorChars = new IntHashtable();
    protected int arabicOptions;

    /** Creates new BidiLine */
    public BidiLine() {
    }

    public BidiLine(BidiLine org) {
        runDirection = org.runDirection;
        pieceSize = org.pieceSize;
        text = org.text.clone();
        detailChunks = org.detailChunks.clone();
        totalTextLength = org.totalTextLength;

        orderLevels = org.orderLevels.clone();
        indexChars = org.indexChars.clone();

        chunks = new ArrayList<PdfChunk>(org.chunks);
        indexChunk = org.indexChunk;
        indexChunkChar = org.indexChunkChar;
        currentChar = org.currentChar;

        storedRunDirection = org.storedRunDirection;
        storedText = org.storedText.clone();
        storedDetailChunks = org.storedDetailChunks.clone();
        storedTotalTextLength = org.storedTotalTextLength;

        storedOrderLevels = org.storedOrderLevels.clone();
        storedIndexChars = org.storedIndexChars.clone();

        storedIndexChunk = org.storedIndexChunk;
        storedIndexChunkChar = org.storedIndexChunkChar;
        storedCurrentChar = org.storedCurrentChar;

        shortStore = org.shortStore;
        arabicOptions = org.arabicOptions;
    }

    public boolean isEmpty() {
        return currentChar >= totalTextLength && indexChunk >= chunks.size();
    }

    public void clearChunks() {
        chunks.clear();
        totalTextLength = 0;
        currentChar = 0;
    }

    public boolean getParagraph(int runDirection) {
        this.runDirection = runDirection;
        currentChar = 0;
        totalTextLength = 0;

        boolean hasText = false;
        char c;
        char uniC;
        BaseFont bf;
        for (; indexChunk < chunks.size(); ++indexChunk) {
            PdfChunk ck = chunks.get(indexChunk);
            bf = ck.font().getFont();
            String s = ck.toString();
            int len = s.length();
            for (; indexChunkChar < len; ++indexChunkChar) {
                c = s.charAt(indexChunkChar);
                uniC = (char)bf.getUnicodeEquivalent(c);
                if (uniC == '\r' || uniC == '\n') {
                    // next condition is never true for CID
                    if (uniC == '\r' && indexChunkChar + 1 < len && s.charAt(indexChunkChar + 1) == '\n')
                        ++indexChunkChar;
                    ++indexChunkChar;
                    if (indexChunkChar >= len) {
                        indexChunkChar = 0;
                        ++indexChunk;
                    }
                    hasText = true;
                    if (totalTextLength == 0)
                        detailChunks[0] = ck;
                    break;
                }
                addPiece(c, ck);
            }
            if (hasText)
                break;
            indexChunkChar = 0;
        }
        if (totalTextLength == 0)
            return hasText;

        // remove trailing WS
        totalTextLength = trimRight(0, totalTextLength - 1) + 1;
        if (totalTextLength == 0) {
        	return true;
        }

        if (runDirection != PdfWriter.RUN_DIRECTION_NO_BIDI) {
            if (orderLevels.length < totalTextLength) {
                orderLevels = new byte[pieceSize];
                indexChars = new int[pieceSize];
            }
            ArabicLigaturizer.processNumbers(text, 0, totalTextLength, arabicOptions);
            byte paragraphEmbeddingLevel;
            switch (runDirection) {
                case PdfWriter.RUN_DIRECTION_LTR:
                    paragraphEmbeddingLevel = 0;
                    break;
                case PdfWriter.RUN_DIRECTION_RTL:
                    paragraphEmbeddingLevel = 1;
                    break;
                case PdfWriter.RUN_DIRECTION_DEFAULT:
                default:
                    paragraphEmbeddingLevel = -1;
                    break;
            }
            BidiOrder order = new BidiOrder(text, 0, totalTextLength, paragraphEmbeddingLevel);
            byte od[] = order.getLevels();
            for (int k = 0; k < totalTextLength; ++k) {
                orderLevels[k] = od[k];
                indexChars[k] = k;
            }
            doArabicShapping();
            mirrorGlyphs();
        }
        totalTextLength = trimRightEx(0, totalTextLength - 1) + 1;
        return true;
    }

    public void addChunk(PdfChunk chunk) {
        chunks.add(chunk);
    }

    public void addChunks(ArrayList<PdfChunk> chunks) {
        this.chunks.addAll(chunks);
    }

    public void addPiece(char c, PdfChunk chunk) {
        if (totalTextLength >= pieceSize) {
            char tempText[] = text;
            PdfChunk tempDetailChunks[] = detailChunks;
            pieceSize *= 2;
            text = new char[pieceSize];
            detailChunks = new PdfChunk[pieceSize];
            System.arraycopy(tempText, 0, text, 0, totalTextLength);
            System.arraycopy(tempDetailChunks, 0, detailChunks, 0, totalTextLength);
        }
        text[totalTextLength] = c;
        detailChunks[totalTextLength++] = chunk;
    }

    public void save() {
        if (indexChunk > 0) {
            if (indexChunk >= chunks.size())
                chunks.clear();
            else {
                for (--indexChunk; indexChunk >= 0; --indexChunk)
                    chunks.remove(indexChunk);
            }
            indexChunk = 0;
        }
        storedRunDirection = runDirection;
        storedTotalTextLength = totalTextLength;
        storedIndexChunk = indexChunk;
        storedIndexChunkChar = indexChunkChar;
        storedCurrentChar = currentChar;
        shortStore = currentChar < totalTextLength;
        if (!shortStore) {
            // long save
            if (storedText.length < totalTextLength) {
                storedText = new char[totalTextLength];
                storedDetailChunks = new PdfChunk[totalTextLength];
            }
            System.arraycopy(text, 0, storedText, 0, totalTextLength);
            System.arraycopy(detailChunks, 0, storedDetailChunks, 0, totalTextLength);
        }
        if (runDirection != PdfWriter.RUN_DIRECTION_NO_BIDI) {
            if (storedOrderLevels.length < totalTextLength) {
                storedOrderLevels = new byte[totalTextLength];
                storedIndexChars = new int[totalTextLength];
            }
            System.arraycopy(orderLevels, currentChar, storedOrderLevels, currentChar, totalTextLength - currentChar);
            System.arraycopy(indexChars, currentChar, storedIndexChars, currentChar, totalTextLength - currentChar);
        }
    }

    public void restore() {
        runDirection = storedRunDirection;
        totalTextLength = storedTotalTextLength;
        indexChunk = storedIndexChunk;
        indexChunkChar = storedIndexChunkChar;
        currentChar = storedCurrentChar;
        if (!shortStore) {
            // long restore
            System.arraycopy(storedText, 0, text, 0, totalTextLength);
            System.arraycopy(storedDetailChunks, 0, detailChunks, 0, totalTextLength);
        }
        if (runDirection != PdfWriter.RUN_DIRECTION_NO_BIDI) {
            System.arraycopy(storedOrderLevels, currentChar, orderLevels, currentChar, totalTextLength - currentChar);
            System.arraycopy(storedIndexChars, currentChar, indexChars, currentChar, totalTextLength - currentChar);
        }
    }

    public void mirrorGlyphs() {
        for (int k = 0; k < totalTextLength; ++k) {
            if ((orderLevels[k] & 1) == 1) {
                int mirror = mirrorChars.get(text[k]);
                if (mirror != 0)
                    text[k] = (char)mirror;
            }
        }
    }

    public void doArabicShapping() {
        int src = 0;
        int dest = 0;
        for (;;) {
            while (src < totalTextLength) {
                char c = text[src];
                if (c >= 0x0600 && c <= 0x06ff)
                    break;
                if (src != dest) {
                    text[dest] = text[src];
                    detailChunks[dest] = detailChunks[src];
                    orderLevels[dest] = orderLevels[src];
                }
                ++src;
                ++dest;
            }
            if (src >= totalTextLength) {
                totalTextLength = dest;
                return;
            }
            int startArabicIdx = src;
            ++src;
            while (src < totalTextLength) {
                char c = text[src];
                if (c < 0x0600 || c > 0x06ff)
                    break;
                ++src;
            }
            int arabicWordSize = src - startArabicIdx;
            int size = ArabicLigaturizer.arabic_shape(text, startArabicIdx, arabicWordSize, text, dest, arabicWordSize, arabicOptions);
            if (startArabicIdx != dest) {
                for (int k = 0; k < size; ++k) {
                    detailChunks[dest] = detailChunks[startArabicIdx];
                    orderLevels[dest++] = orderLevels[startArabicIdx++];
                }
            }
            else
                dest += size;
        }
    }

    public PdfLine processLine(float leftX, float width, int alignment, int runDirection, int arabicOptions, float minY, float yLine, float descender) {
        isWordSplit = false;
        this.arabicOptions = arabicOptions;
        save();
        boolean isRTL = runDirection == PdfWriter.RUN_DIRECTION_RTL;
        if (currentChar >= totalTextLength) {
            boolean hasText = getParagraph(runDirection);
            if (!hasText)
                return null;
            if (totalTextLength == 0) {
                ArrayList<PdfChunk> ar = new ArrayList<PdfChunk>();
                PdfChunk ck = new PdfChunk("", detailChunks[0]);
                ar.add(ck);
                return new PdfLine(0, 0, width, alignment, true, ar, isRTL);
            }
        }
        float originalWidth = width;
        int lastSplit = -1;
        if (currentChar != 0)
            currentChar = trimLeftEx(currentChar, totalTextLength - 1);

        int oldCurrentChar = currentChar;
        int uniC = 0;
        PdfChunk ck = null;
        float charWidth = 0;
        PdfChunk lastValidChunk = null;
        TabStop tabStop = null;
        List<TabStop> rtlTabsToBeAligned = new ArrayList<TabStop>();
        float tabStopAnchorPosition = Float.NaN;
        float tabPosition = Float.NaN;
        boolean surrogate = false;
        for (; currentChar < totalTextLength; ++currentChar) {
            ck = detailChunks[currentChar];
            if (ck.isImage() && minY < yLine) {
                Image img = ck.getImage();
                if (img.isScaleToFitHeight() && yLine + 2 * descender - img.getScaledHeight() - ck.getImageOffsetY() - img.getSpacingBefore() < minY) {
                    float scalePercent = (yLine + 2 * descender - ck.getImageOffsetY() - img.getSpacingBefore() - minY) / img.getScaledHeight();
                	ck.setImageScalePercentage(scalePercent);
                }
            }
            surrogate = Utilities.isSurrogatePair(text, currentChar);
            if (surrogate)
                uniC = ck.getUnicodeEquivalent(Utilities.convertToUtf32(text, currentChar));
            else
                uniC = ck.getUnicodeEquivalent(text[currentChar]);
            if (PdfChunk.noPrint(uniC))
                continue;
            if (surrogate)
                charWidth = ck.getCharWidth(uniC);
            else {
                if (ck.isImage()) {
                    charWidth = ck.getImageWidth();
                } else {
                    charWidth = ck.getCharWidth(text[currentChar]);
                }
            }
            if (width - charWidth < 0) {
            	// If the chunk is an image and it is the first one in line, check if resize requested
            	// If so, resize to fit the current line width
            	if (lastValidChunk == null && ck.isImage()) {
            		Image img = ck.getImage();
            		if (img.isScaleToFitLineWhenOverflow()) {
            			//float scalePercent = width / img.getWidth() * 100;
            			//img.scalePercent(scalePercent);
            			float scalePercent = width / img.getWidth();
            			ck.setImageScalePercentage(scalePercent);
            			charWidth = width;
            		}
            	}
            }
            if (ck.isTab()) {
                if (ck.isAttribute(Chunk.TABSETTINGS)) {
                    lastSplit = currentChar;
                    if (tabStop != null) {
                        width = processTabStop(tabStop, tabPosition, originalWidth, width, tabStopAnchorPosition, isRTL, rtlTabsToBeAligned);
                    }

                    tabStop = PdfChunk.getTabStop(ck, originalWidth - width);
                    if (tabStop.getPosition() > originalWidth) {
                        tabStop = null;
                        break;
                    }
                    ck.setTabStop(tabStop);
                    if (!isRTL && tabStop.getAlignment() == TabStop.Alignment.LEFT) {
                        width = originalWidth - tabStop.getPosition();
                        tabStop = null;
                        tabPosition = Float.NaN;
                        tabStopAnchorPosition = Float.NaN;
                    } else {
                        tabPosition = originalWidth - width;
                        tabStopAnchorPosition = Float.NaN;
                    }
                } else {
                    Object[] tab = (Object[])ck.getAttribute(Chunk.TAB);
                    //Keep deprecated tab logic for backward compatibility...
                    float tabStopPosition = ((Float)tab[1]).floatValue();
                    boolean newLine = ((Boolean)tab[2]).booleanValue();
                    if (newLine && tabStopPosition < originalWidth - width) {
                        return new PdfLine(0, originalWidth, width, alignment, true, createArrayOfPdfChunks(oldCurrentChar, currentChar - 1), isRTL);
                    }
                    detailChunks[currentChar].adjustLeft(leftX);
                    width = originalWidth - tabStopPosition;
                }
            }
            else if (ck.isSeparator()) {
                Object[] sep = (Object[])ck.getAttribute(Chunk.SEPARATOR);
                DrawInterface di = (DrawInterface)sep[0];
                Boolean vertical = (Boolean)sep[1];
                if (vertical && di instanceof LineSeparator) {
                    float separatorWidth = originalWidth * ((LineSeparator) di).getPercentage() / 100f;
                    width -= separatorWidth;
                    if (width < 0) {
                        width = 0;
                    }
                }
            } else {
                boolean splitChar = ck.isExtSplitCharacter(oldCurrentChar, currentChar, totalTextLength, text, detailChunks);
                if (splitChar && Character.isWhitespace((char)uniC))
                    lastSplit = currentChar;
                if (width - charWidth < 0)
                    break;
                if (tabStop != null && tabStop.getAlignment() == TabStop.Alignment.ANCHOR && Float.isNaN(tabStopAnchorPosition) && tabStop.getAnchorChar() == (char) uniC) {
                    tabStopAnchorPosition = originalWidth - width;
                }
                width -= charWidth;
                if (splitChar)
                    lastSplit = currentChar;
            }
            lastValidChunk = ck;
            if (surrogate)
                ++currentChar;
        }
        if (lastValidChunk == null) {
            // not even a single char fit; must output the first char
            ++currentChar;
            if (surrogate)
                ++currentChar;
            return new PdfLine(0, originalWidth, 0, alignment, false, createArrayOfPdfChunks(currentChar - 1, currentChar - 1), isRTL);
        }

        if (tabStop != null) {
            width = processTabStop(tabStop, tabPosition, originalWidth, width, tabStopAnchorPosition, isRTL, rtlTabsToBeAligned);
        }
        if (rtlTabsToBeAligned != null) {
            for (TabStop rtlTabStop : rtlTabsToBeAligned) {
                rtlTabStop.setPosition(originalWidth - width - rtlTabStop.getPosition());
            }
        }

        if (currentChar >= totalTextLength) {
            // there was more line than text
            return new PdfLine(0, originalWidth, width, alignment, true, createArrayOfPdfChunks(oldCurrentChar, totalTextLength - 1), isRTL);
        }
        int newCurrentChar = trimRightEx(oldCurrentChar, currentChar - 1);
        if (newCurrentChar < oldCurrentChar) {
            // only WS
            return new PdfLine(0, originalWidth, width, alignment, false, createArrayOfPdfChunks(oldCurrentChar, currentChar - 1), isRTL);
        }
        if (newCurrentChar == currentChar - 1) { // middle of word
            HyphenationEvent he = (HyphenationEvent)lastValidChunk.getAttribute(Chunk.HYPHENATION);
            if (he != null) {
                int word[] = getWord(oldCurrentChar, newCurrentChar);
                if (word != null) {
                    float testWidth = width + getWidth(word[0], currentChar - 1);
                    String pre = he.getHyphenatedWordPre(new String(text, word[0], word[1] - word[0]), lastValidChunk.font().getFont(), lastValidChunk.font().size(), testWidth);
                    String post = he.getHyphenatedWordPost();
                    if (pre.length() > 0) {
                        PdfChunk extra = new PdfChunk(pre, lastValidChunk);
                        currentChar = word[1] - post.length();
                        return new PdfLine(0, originalWidth, testWidth - lastValidChunk.width(pre), alignment, false, createArrayOfPdfChunks(oldCurrentChar, word[0] - 1, extra), isRTL);
                    }
                }
            }
        }
        if (lastSplit == -1)
            isWordSplit = true;
        if (lastSplit == -1 || lastSplit >= newCurrentChar) {
            // no split point or split point ahead of end
            return new PdfLine(0, originalWidth, width + getWidth(newCurrentChar + 1, currentChar - 1, originalWidth), alignment, false, createArrayOfPdfChunks(oldCurrentChar, newCurrentChar), isRTL);
        }
        // standard split
        currentChar = lastSplit + 1;
        newCurrentChar = trimRightEx(oldCurrentChar, lastSplit);
        if (newCurrentChar < oldCurrentChar) {
            // only WS again
            newCurrentChar = currentChar - 1;
        }
        return new PdfLine(0, originalWidth, originalWidth - getWidth(oldCurrentChar, newCurrentChar, originalWidth), alignment, false, createArrayOfPdfChunks(oldCurrentChar, newCurrentChar), isRTL);
    }

    private float processTabStop(TabStop tabStop, float tabPosition, float originalWidth, float width, float tabStopAnchorPosition, boolean isRTL, List<TabStop> rtlTabsToBeAligned) {
        float tabStopPosition = tabStop.getPosition(tabPosition, originalWidth - width, tabStopAnchorPosition);
        width -= tabStopPosition - tabPosition;
        if (width < 0) {
            tabStopPosition += width;
            width = 0;
        }
        if (!isRTL) {
            tabStop.setPosition(tabStopPosition);
        } else {
            tabStop.setPosition(tabPosition); // This will be mirrored when we know exact line width
            rtlTabsToBeAligned.add(tabStop);
        }
        return width;
    }

    /**
     * Call this after processLine() to know if any word was split into several lines.
     * @return
     */
    public boolean isWordSplit() {
        return isWordSplit;
    }

    /** Gets the width of a range of characters.
     * @param startIdx the first index to calculate
     * @param lastIdx the last inclusive index to calculate
     * @return the sum of all widths
     */
    public float getWidth(int startIdx, int lastIdx) {
        return getWidth(startIdx, lastIdx, 0);
    }

    /** Gets the width of a range of characters.
     * @param startIdx the first index to calculate
     * @param lastIdx the last inclusive index to calculate
     * @param originalWidth the full width of the line. It is used in case of RTL and tab stops
     * @return the sum of all widths
     */
    public float getWidth(int startIdx, int lastIdx, float originalWidth) {
        char c = 0;
        PdfChunk ck = null;
        float width = 0;
        TabStop tabStop = null;
        float tabStopAnchorPosition = Float.NaN;
        float tabPosition = Float.NaN;
        for (; startIdx <= lastIdx; ++startIdx) {
            boolean surrogate = Utilities.isSurrogatePair(text, startIdx);
            if (detailChunks[startIdx].isTab()
                    //Keep deprecated tab logic for backward compatibility...
                    && detailChunks[startIdx].isAttribute(Chunk.TABSETTINGS)) {
                if (tabStop != null) {
                    float tabStopPosition = tabStop.getPosition(tabPosition, width, tabStopAnchorPosition);
                    width = tabStopPosition + (width - tabPosition);
                    tabStop.setPosition(tabStopPosition);
                }
                tabStop = detailChunks[startIdx].getTabStop();
                if (tabStop == null) {
                    tabStop = PdfChunk.getTabStop(detailChunks[startIdx], width);
                    tabPosition = width;
                    tabStopAnchorPosition = Float.NaN;
                } else {
                    if (runDirection == PdfWriter.RUN_DIRECTION_RTL) {
                        width = originalWidth - tabStop.getPosition();
                    } else {
                        width = tabStop.getPosition();
                    }
                    tabStop = null;
                    tabPosition = Float.NaN;
                    tabStopAnchorPosition = Float.NaN;
                }
            } else if (surrogate) {
                width += detailChunks[startIdx].getCharWidth(Utilities.convertToUtf32(text, startIdx));
                ++startIdx;
            }
            else {
                c = text[startIdx];
                ck = detailChunks[startIdx];
                if (PdfChunk.noPrint(ck.getUnicodeEquivalent(c)))
                    continue;
                if (tabStop != null && tabStop.getAlignment() != TabStop.Alignment.ANCHOR && Float.isNaN(tabStopAnchorPosition) && tabStop.getAnchorChar() == (char)ck.getUnicodeEquivalent(c)) {
                    tabStopAnchorPosition = width;
                }
                width += detailChunks[startIdx].getCharWidth(c);
            }
        }
        if (tabStop != null) {
            float tabStopPosition = tabStop.getPosition(tabPosition, width, tabStopAnchorPosition);
            width = tabStopPosition + (width - tabPosition);
            tabStop.setPosition(tabStopPosition);
        }
        return width;
    }

    public ArrayList<PdfChunk> createArrayOfPdfChunks(int startIdx, int endIdx) {
        return createArrayOfPdfChunks(startIdx, endIdx, null);
    }

    public ArrayList<PdfChunk> createArrayOfPdfChunks(int startIdx, int endIdx, PdfChunk extraPdfChunk) {
        boolean bidi = runDirection != PdfWriter.RUN_DIRECTION_NO_BIDI;
        if (bidi)
            reorder(startIdx, endIdx);

        ArrayList<PdfChunk> ar = new ArrayList<PdfChunk>();
        PdfChunk refCk = detailChunks[startIdx];
        PdfChunk ck = null;
        StringBuffer buf = new StringBuffer();
        char c;
        int idx = 0;
        for (; startIdx <= endIdx; ++startIdx) {
            idx = bidi ? indexChars[startIdx] : startIdx;
            c = text[idx];
            ck = detailChunks[idx];
            if (PdfChunk.noPrint(ck.getUnicodeEquivalent(c)))
                continue;
            if (ck.isImage() || ck.isSeparator() || ck.isTab()) {
                if (buf.length() > 0) {
                    ar.add(new PdfChunk(buf.toString(), refCk));
                    buf = new StringBuffer();
                }
                ar.add(ck);
            }
            else if (ck == refCk) {
                buf.append(c);
            }
            else {
                if (buf.length() > 0) {
                    ar.add(new PdfChunk(buf.toString(), refCk));
                    buf = new StringBuffer();
                }
                if (!ck.isImage() && !ck.isSeparator() && !ck.isTab())
                    buf.append(c);
                refCk = ck;
            }
        }
        if (buf.length() > 0) {
            ar.add(new PdfChunk(buf.toString(), refCk));
        }
        if (extraPdfChunk != null)
            ar.add(extraPdfChunk);
        return ar;
    }

    public int[] getWord(int startIdx, int idx) {
        int last = idx;
        int first = idx;
        // forward
        for (; last < totalTextLength; ++last) {
            if (!Character.isLetter(text[last]) && !Character.isDigit(text[last]) && text[last] != '\u00AD')
                break;
        }
        if (last == idx)
            return null;
        // backward
        for (; first >= startIdx; --first) {
            if (!Character.isLetter(text[first]) && !Character.isDigit(text[first]) && text[first] != '\u00AD')
                break;
        }
        ++first;
        return new int[]{first, last};
    }

    public int trimRight(int startIdx, int endIdx) {
        int idx = endIdx;
        char c;
        for (; idx >= startIdx; --idx) {
            c = (char)detailChunks[idx].getUnicodeEquivalent(text[idx]);
            if (!isWS(c))
                break;
        }
        return idx;
    }

    public int trimLeft(int startIdx, int endIdx) {
        int idx = startIdx;
        char c;
        for (; idx <= endIdx; ++idx) {
            c = (char)detailChunks[idx].getUnicodeEquivalent(text[idx]);
            if (!isWS(c))
                break;
        }
        return idx;
    }

    public int trimRightEx(int startIdx, int endIdx) {
        int idx = endIdx;
        char c = 0;
        for (; idx >= startIdx; --idx) {
            c = (char)detailChunks[idx].getUnicodeEquivalent(text[idx]);
            if (!isWS(c) && !PdfChunk.noPrint(c)) {
                if (detailChunks[idx].isTab()
                        //Keep deprecated tab logic for backward compatibility...
                        && detailChunks[idx].isAttribute(Chunk.TABSETTINGS)) {
                    Object[] tab = (Object[])detailChunks[idx].getAttribute(Chunk.TAB);
                    boolean isWhitespace = (Boolean)tab[1];
                    if (isWhitespace)
                        continue;
                }
                break;
            }
        }
        return idx;
    }

    public int trimLeftEx(int startIdx, int endIdx) {
        int idx = startIdx;
        char c = 0;
        for (; idx <= endIdx; ++idx) {
            c = (char)detailChunks[idx].getUnicodeEquivalent(text[idx]);
            if (!isWS(c) && !PdfChunk.noPrint(c)) {
                if (detailChunks[idx].isTab()
                        //Keep deprecated tab logic for backward compatibility...
                        && detailChunks[idx].isAttribute(Chunk.TABSETTINGS)) {
                    Object[] tab = (Object[])detailChunks[idx].getAttribute(Chunk.TAB);
                    boolean isWhitespace = (Boolean)tab[1];
                    if (isWhitespace)
                        continue;
                }
                break;
            }
        }
        return idx;
    }

    public void reorder(int start, int end) {
        byte maxLevel = orderLevels[start];
        byte minLevel = maxLevel;
        byte onlyOddLevels = maxLevel;
        byte onlyEvenLevels = maxLevel;
        for (int k = start + 1; k <= end; ++k) {
            byte b = orderLevels[k];
            if (b > maxLevel)
                maxLevel = b;
            else if (b < minLevel)
                minLevel = b;
            onlyOddLevels &= b;
            onlyEvenLevels |= b;
        }
        if ((onlyEvenLevels & 1) == 0) // nothing to do
            return;
        if ((onlyOddLevels & 1) == 1) { // single inversion
            flip(start, end + 1);
            return;
        }
        minLevel |= 1;
        for (; maxLevel >= minLevel; --maxLevel) {
            int pstart = start;
            for (;;) {
                for (;pstart <= end; ++pstart) {
                    if (orderLevels[pstart] >= maxLevel)
                        break;
                }
                if (pstart > end)
                    break;
                int pend = pstart + 1;
                for (; pend <= end; ++pend) {
                    if (orderLevels[pend] < maxLevel)
                        break;
                }
                flip(pstart, pend);
                pstart = pend + 1;
            }
        }
    }

    public void flip(int start, int end) {
        int mid = (start + end) / 2;
        --end;
        for (; start < mid; ++start, --end) {
            int temp = indexChars[start];
            indexChars[start] = indexChars[end];
            indexChars[end] = temp;
        }
    }

    public static boolean isWS(char c) {
        return c <= ' ';
    }

    static {
        mirrorChars.put(0x0028, 0x0029); // LEFT PARENTHESIS
        mirrorChars.put(0x0029, 0x0028); // RIGHT PARENTHESIS
        mirrorChars.put(0x003C, 0x003E); // LESS-THAN SIGN
        mirrorChars.put(0x003E, 0x003C); // GREATER-THAN SIGN
        mirrorChars.put(0x005B, 0x005D); // LEFT SQUARE BRACKET
        mirrorChars.put(0x005D, 0x005B); // RIGHT SQUARE BRACKET
        mirrorChars.put(0x007B, 0x007D); // LEFT CURLY BRACKET
        mirrorChars.put(0x007D, 0x007B); // RIGHT CURLY BRACKET
        mirrorChars.put(0x00AB, 0x00BB); // LEFT-POINTING DOUBLE ANGLE QUOTATION MARK
        mirrorChars.put(0x00BB, 0x00AB); // RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK
        mirrorChars.put(0x2039, 0x203A); // SINGLE LEFT-POINTING ANGLE QUOTATION MARK
        mirrorChars.put(0x203A, 0x2039); // SINGLE RIGHT-POINTING ANGLE QUOTATION MARK
        mirrorChars.put(0x2045, 0x2046); // LEFT SQUARE BRACKET WITH QUILL
        mirrorChars.put(0x2046, 0x2045); // RIGHT SQUARE BRACKET WITH QUILL
        mirrorChars.put(0x207D, 0x207E); // SUPERSCRIPT LEFT PARENTHESIS
        mirrorChars.put(0x207E, 0x207D); // SUPERSCRIPT RIGHT PARENTHESIS
        mirrorChars.put(0x208D, 0x208E); // SUBSCRIPT LEFT PARENTHESIS
        mirrorChars.put(0x208E, 0x208D); // SUBSCRIPT RIGHT PARENTHESIS
        mirrorChars.put(0x2208, 0x220B); // ELEMENT OF
        mirrorChars.put(0x2209, 0x220C); // NOT AN ELEMENT OF
        mirrorChars.put(0x220A, 0x220D); // SMALL ELEMENT OF
        mirrorChars.put(0x220B, 0x2208); // CONTAINS AS MEMBER
        mirrorChars.put(0x220C, 0x2209); // DOES NOT CONTAIN AS MEMBER
        mirrorChars.put(0x220D, 0x220A); // SMALL CONTAINS AS MEMBER
        mirrorChars.put(0x2215, 0x29F5); // DIVISION SLASH
        mirrorChars.put(0x223C, 0x223D); // TILDE OPERATOR
        mirrorChars.put(0x223D, 0x223C); // REVERSED TILDE
        mirrorChars.put(0x2243, 0x22CD); // ASYMPTOTICALLY EQUAL TO
        mirrorChars.put(0x2252, 0x2253); // APPROXIMATELY EQUAL TO OR THE IMAGE OF
        mirrorChars.put(0x2253, 0x2252); // IMAGE OF OR APPROXIMATELY EQUAL TO
        mirrorChars.put(0x2254, 0x2255); // COLON EQUALS
        mirrorChars.put(0x2255, 0x2254); // EQUALS COLON
        mirrorChars.put(0x2264, 0x2265); // LESS-THAN OR EQUAL TO
        mirrorChars.put(0x2265, 0x2264); // GREATER-THAN OR EQUAL TO
        mirrorChars.put(0x2266, 0x2267); // LESS-THAN OVER EQUAL TO
        mirrorChars.put(0x2267, 0x2266); // GREATER-THAN OVER EQUAL TO
        mirrorChars.put(0x2268, 0x2269); // [BEST FIT] LESS-THAN BUT NOT EQUAL TO
        mirrorChars.put(0x2269, 0x2268); // [BEST FIT] GREATER-THAN BUT NOT EQUAL TO
        mirrorChars.put(0x226A, 0x226B); // MUCH LESS-THAN
        mirrorChars.put(0x226B, 0x226A); // MUCH GREATER-THAN
        mirrorChars.put(0x226E, 0x226F); // [BEST FIT] NOT LESS-THAN
        mirrorChars.put(0x226F, 0x226E); // [BEST FIT] NOT GREATER-THAN
        mirrorChars.put(0x2270, 0x2271); // [BEST FIT] NEITHER LESS-THAN NOR EQUAL TO
        mirrorChars.put(0x2271, 0x2270); // [BEST FIT] NEITHER GREATER-THAN NOR EQUAL TO
        mirrorChars.put(0x2272, 0x2273); // [BEST FIT] LESS-THAN OR EQUIVALENT TO
        mirrorChars.put(0x2273, 0x2272); // [BEST FIT] GREATER-THAN OR EQUIVALENT TO
        mirrorChars.put(0x2274, 0x2275); // [BEST FIT] NEITHER LESS-THAN NOR EQUIVALENT TO
        mirrorChars.put(0x2275, 0x2274); // [BEST FIT] NEITHER GREATER-THAN NOR EQUIVALENT TO
        mirrorChars.put(0x2276, 0x2277); // LESS-THAN OR GREATER-THAN
        mirrorChars.put(0x2277, 0x2276); // GREATER-THAN OR LESS-THAN
        mirrorChars.put(0x2278, 0x2279); // NEITHER LESS-THAN NOR GREATER-THAN
        mirrorChars.put(0x2279, 0x2278); // NEITHER GREATER-THAN NOR LESS-THAN
        mirrorChars.put(0x227A, 0x227B); // PRECEDES
        mirrorChars.put(0x227B, 0x227A); // SUCCEEDS
        mirrorChars.put(0x227C, 0x227D); // PRECEDES OR EQUAL TO
        mirrorChars.put(0x227D, 0x227C); // SUCCEEDS OR EQUAL TO
        mirrorChars.put(0x227E, 0x227F); // [BEST FIT] PRECEDES OR EQUIVALENT TO
        mirrorChars.put(0x227F, 0x227E); // [BEST FIT] SUCCEEDS OR EQUIVALENT TO
        mirrorChars.put(0x2280, 0x2281); // [BEST FIT] DOES NOT PRECEDE
        mirrorChars.put(0x2281, 0x2280); // [BEST FIT] DOES NOT SUCCEED
        mirrorChars.put(0x2282, 0x2283); // SUBSET OF
        mirrorChars.put(0x2283, 0x2282); // SUPERSET OF
        mirrorChars.put(0x2284, 0x2285); // [BEST FIT] NOT A SUBSET OF
        mirrorChars.put(0x2285, 0x2284); // [BEST FIT] NOT A SUPERSET OF
        mirrorChars.put(0x2286, 0x2287); // SUBSET OF OR EQUAL TO
        mirrorChars.put(0x2287, 0x2286); // SUPERSET OF OR EQUAL TO
        mirrorChars.put(0x2288, 0x2289); // [BEST FIT] NEITHER A SUBSET OF NOR EQUAL TO
        mirrorChars.put(0x2289, 0x2288); // [BEST FIT] NEITHER A SUPERSET OF NOR EQUAL TO
        mirrorChars.put(0x228A, 0x228B); // [BEST FIT] SUBSET OF WITH NOT EQUAL TO
        mirrorChars.put(0x228B, 0x228A); // [BEST FIT] SUPERSET OF WITH NOT EQUAL TO
        mirrorChars.put(0x228F, 0x2290); // SQUARE IMAGE OF
        mirrorChars.put(0x2290, 0x228F); // SQUARE ORIGINAL OF
        mirrorChars.put(0x2291, 0x2292); // SQUARE IMAGE OF OR EQUAL TO
        mirrorChars.put(0x2292, 0x2291); // SQUARE ORIGINAL OF OR EQUAL TO
        mirrorChars.put(0x2298, 0x29B8); // CIRCLED DIVISION SLASH
        mirrorChars.put(0x22A2, 0x22A3); // RIGHT TACK
        mirrorChars.put(0x22A3, 0x22A2); // LEFT TACK
        mirrorChars.put(0x22A6, 0x2ADE); // ASSERTION
        mirrorChars.put(0x22A8, 0x2AE4); // TRUE
        mirrorChars.put(0x22A9, 0x2AE3); // FORCES
        mirrorChars.put(0x22AB, 0x2AE5); // DOUBLE VERTICAL BAR DOUBLE RIGHT TURNSTILE
        mirrorChars.put(0x22B0, 0x22B1); // PRECEDES UNDER RELATION
        mirrorChars.put(0x22B1, 0x22B0); // SUCCEEDS UNDER RELATION
        mirrorChars.put(0x22B2, 0x22B3); // NORMAL SUBGROUP OF
        mirrorChars.put(0x22B3, 0x22B2); // CONTAINS AS NORMAL SUBGROUP
        mirrorChars.put(0x22B4, 0x22B5); // NORMAL SUBGROUP OF OR EQUAL TO
        mirrorChars.put(0x22B5, 0x22B4); // CONTAINS AS NORMAL SUBGROUP OR EQUAL TO
        mirrorChars.put(0x22B6, 0x22B7); // ORIGINAL OF
        mirrorChars.put(0x22B7, 0x22B6); // IMAGE OF
        mirrorChars.put(0x22C9, 0x22CA); // LEFT NORMAL FACTOR SEMIDIRECT PRODUCT
        mirrorChars.put(0x22CA, 0x22C9); // RIGHT NORMAL FACTOR SEMIDIRECT PRODUCT
        mirrorChars.put(0x22CB, 0x22CC); // LEFT SEMIDIRECT PRODUCT
        mirrorChars.put(0x22CC, 0x22CB); // RIGHT SEMIDIRECT PRODUCT
        mirrorChars.put(0x22CD, 0x2243); // REVERSED TILDE EQUALS
        mirrorChars.put(0x22D0, 0x22D1); // DOUBLE SUBSET
        mirrorChars.put(0x22D1, 0x22D0); // DOUBLE SUPERSET
        mirrorChars.put(0x22D6, 0x22D7); // LESS-THAN WITH DOT
        mirrorChars.put(0x22D7, 0x22D6); // GREATER-THAN WITH DOT
        mirrorChars.put(0x22D8, 0x22D9); // VERY MUCH LESS-THAN
        mirrorChars.put(0x22D9, 0x22D8); // VERY MUCH GREATER-THAN
        mirrorChars.put(0x22DA, 0x22DB); // LESS-THAN EQUAL TO OR GREATER-THAN
        mirrorChars.put(0x22DB, 0x22DA); // GREATER-THAN EQUAL TO OR LESS-THAN
        mirrorChars.put(0x22DC, 0x22DD); // EQUAL TO OR LESS-THAN
        mirrorChars.put(0x22DD, 0x22DC); // EQUAL TO OR GREATER-THAN
        mirrorChars.put(0x22DE, 0x22DF); // EQUAL TO OR PRECEDES
        mirrorChars.put(0x22DF, 0x22DE); // EQUAL TO OR SUCCEEDS
        mirrorChars.put(0x22E0, 0x22E1); // [BEST FIT] DOES NOT PRECEDE OR EQUAL
        mirrorChars.put(0x22E1, 0x22E0); // [BEST FIT] DOES NOT SUCCEED OR EQUAL
        mirrorChars.put(0x22E2, 0x22E3); // [BEST FIT] NOT SQUARE IMAGE OF OR EQUAL TO
        mirrorChars.put(0x22E3, 0x22E2); // [BEST FIT] NOT SQUARE ORIGINAL OF OR EQUAL TO
        mirrorChars.put(0x22E4, 0x22E5); // [BEST FIT] SQUARE IMAGE OF OR NOT EQUAL TO
        mirrorChars.put(0x22E5, 0x22E4); // [BEST FIT] SQUARE ORIGINAL OF OR NOT EQUAL TO
        mirrorChars.put(0x22E6, 0x22E7); // [BEST FIT] LESS-THAN BUT NOT EQUIVALENT TO
        mirrorChars.put(0x22E7, 0x22E6); // [BEST FIT] GREATER-THAN BUT NOT EQUIVALENT TO
        mirrorChars.put(0x22E8, 0x22E9); // [BEST FIT] PRECEDES BUT NOT EQUIVALENT TO
        mirrorChars.put(0x22E9, 0x22E8); // [BEST FIT] SUCCEEDS BUT NOT EQUIVALENT TO
        mirrorChars.put(0x22EA, 0x22EB); // [BEST FIT] NOT NORMAL SUBGROUP OF
        mirrorChars.put(0x22EB, 0x22EA); // [BEST FIT] DOES NOT CONTAIN AS NORMAL SUBGROUP
        mirrorChars.put(0x22EC, 0x22ED); // [BEST FIT] NOT NORMAL SUBGROUP OF OR EQUAL TO
        mirrorChars.put(0x22ED, 0x22EC); // [BEST FIT] DOES NOT CONTAIN AS NORMAL SUBGROUP OR EQUAL
        mirrorChars.put(0x22F0, 0x22F1); // UP RIGHT DIAGONAL ELLIPSIS
        mirrorChars.put(0x22F1, 0x22F0); // DOWN RIGHT DIAGONAL ELLIPSIS
        mirrorChars.put(0x22F2, 0x22FA); // ELEMENT OF WITH LONG HORIZONTAL STROKE
        mirrorChars.put(0x22F3, 0x22FB); // ELEMENT OF WITH VERTICAL BAR AT END OF HORIZONTAL STROKE
        mirrorChars.put(0x22F4, 0x22FC); // SMALL ELEMENT OF WITH VERTICAL BAR AT END OF HORIZONTAL STROKE
        mirrorChars.put(0x22F6, 0x22FD); // ELEMENT OF WITH OVERBAR
        mirrorChars.put(0x22F7, 0x22FE); // SMALL ELEMENT OF WITH OVERBAR
        mirrorChars.put(0x22FA, 0x22F2); // CONTAINS WITH LONG HORIZONTAL STROKE
        mirrorChars.put(0x22FB, 0x22F3); // CONTAINS WITH VERTICAL BAR AT END OF HORIZONTAL STROKE
        mirrorChars.put(0x22FC, 0x22F4); // SMALL CONTAINS WITH VERTICAL BAR AT END OF HORIZONTAL STROKE
        mirrorChars.put(0x22FD, 0x22F6); // CONTAINS WITH OVERBAR
        mirrorChars.put(0x22FE, 0x22F7); // SMALL CONTAINS WITH OVERBAR
        mirrorChars.put(0x2308, 0x2309); // LEFT CEILING
        mirrorChars.put(0x2309, 0x2308); // RIGHT CEILING
        mirrorChars.put(0x230A, 0x230B); // LEFT FLOOR
        mirrorChars.put(0x230B, 0x230A); // RIGHT FLOOR
        mirrorChars.put(0x2329, 0x232A); // LEFT-POINTING ANGLE BRACKET
        mirrorChars.put(0x232A, 0x2329); // RIGHT-POINTING ANGLE BRACKET
        mirrorChars.put(0x2768, 0x2769); // MEDIUM LEFT PARENTHESIS ORNAMENT
        mirrorChars.put(0x2769, 0x2768); // MEDIUM RIGHT PARENTHESIS ORNAMENT
        mirrorChars.put(0x276A, 0x276B); // MEDIUM FLATTENED LEFT PARENTHESIS ORNAMENT
        mirrorChars.put(0x276B, 0x276A); // MEDIUM FLATTENED RIGHT PARENTHESIS ORNAMENT
        mirrorChars.put(0x276C, 0x276D); // MEDIUM LEFT-POINTING ANGLE BRACKET ORNAMENT
        mirrorChars.put(0x276D, 0x276C); // MEDIUM RIGHT-POINTING ANGLE BRACKET ORNAMENT
        mirrorChars.put(0x276E, 0x276F); // HEAVY LEFT-POINTING ANGLE QUOTATION MARK ORNAMENT
        mirrorChars.put(0x276F, 0x276E); // HEAVY RIGHT-POINTING ANGLE QUOTATION MARK ORNAMENT
        mirrorChars.put(0x2770, 0x2771); // HEAVY LEFT-POINTING ANGLE BRACKET ORNAMENT
        mirrorChars.put(0x2771, 0x2770); // HEAVY RIGHT-POINTING ANGLE BRACKET ORNAMENT
        mirrorChars.put(0x2772, 0x2773); // LIGHT LEFT TORTOISE SHELL BRACKET
        mirrorChars.put(0x2773, 0x2772); // LIGHT RIGHT TORTOISE SHELL BRACKET
        mirrorChars.put(0x2774, 0x2775); // MEDIUM LEFT CURLY BRACKET ORNAMENT
        mirrorChars.put(0x2775, 0x2774); // MEDIUM RIGHT CURLY BRACKET ORNAMENT
        mirrorChars.put(0x27D5, 0x27D6); // LEFT OUTER JOIN
        mirrorChars.put(0x27D6, 0x27D5); // RIGHT OUTER JOIN
        mirrorChars.put(0x27DD, 0x27DE); // LONG RIGHT TACK
        mirrorChars.put(0x27DE, 0x27DD); // LONG LEFT TACK
        mirrorChars.put(0x27E2, 0x27E3); // WHITE CONCAVE-SIDED DIAMOND WITH LEFTWARDS TICK
        mirrorChars.put(0x27E3, 0x27E2); // WHITE CONCAVE-SIDED DIAMOND WITH RIGHTWARDS TICK
        mirrorChars.put(0x27E4, 0x27E5); // WHITE SQUARE WITH LEFTWARDS TICK
        mirrorChars.put(0x27E5, 0x27E4); // WHITE SQUARE WITH RIGHTWARDS TICK
        mirrorChars.put(0x27E6, 0x27E7); // MATHEMATICAL LEFT WHITE SQUARE BRACKET
        mirrorChars.put(0x27E7, 0x27E6); // MATHEMATICAL RIGHT WHITE SQUARE BRACKET
        mirrorChars.put(0x27E8, 0x27E9); // MATHEMATICAL LEFT ANGLE BRACKET
        mirrorChars.put(0x27E9, 0x27E8); // MATHEMATICAL RIGHT ANGLE BRACKET
        mirrorChars.put(0x27EA, 0x27EB); // MATHEMATICAL LEFT DOUBLE ANGLE BRACKET
        mirrorChars.put(0x27EB, 0x27EA); // MATHEMATICAL RIGHT DOUBLE ANGLE BRACKET
        mirrorChars.put(0x2983, 0x2984); // LEFT WHITE CURLY BRACKET
        mirrorChars.put(0x2984, 0x2983); // RIGHT WHITE CURLY BRACKET
        mirrorChars.put(0x2985, 0x2986); // LEFT WHITE PARENTHESIS
        mirrorChars.put(0x2986, 0x2985); // RIGHT WHITE PARENTHESIS
        mirrorChars.put(0x2987, 0x2988); // Z NOTATION LEFT IMAGE BRACKET
        mirrorChars.put(0x2988, 0x2987); // Z NOTATION RIGHT IMAGE BRACKET
        mirrorChars.put(0x2989, 0x298A); // Z NOTATION LEFT BINDING BRACKET
        mirrorChars.put(0x298A, 0x2989); // Z NOTATION RIGHT BINDING BRACKET
        mirrorChars.put(0x298B, 0x298C); // LEFT SQUARE BRACKET WITH UNDERBAR
        mirrorChars.put(0x298C, 0x298B); // RIGHT SQUARE BRACKET WITH UNDERBAR
        mirrorChars.put(0x298D, 0x2990); // LEFT SQUARE BRACKET WITH TICK IN TOP CORNER
        mirrorChars.put(0x298E, 0x298F); // RIGHT SQUARE BRACKET WITH TICK IN BOTTOM CORNER
        mirrorChars.put(0x298F, 0x298E); // LEFT SQUARE BRACKET WITH TICK IN BOTTOM CORNER
        mirrorChars.put(0x2990, 0x298D); // RIGHT SQUARE BRACKET WITH TICK IN TOP CORNER
        mirrorChars.put(0x2991, 0x2992); // LEFT ANGLE BRACKET WITH DOT
        mirrorChars.put(0x2992, 0x2991); // RIGHT ANGLE BRACKET WITH DOT
        mirrorChars.put(0x2993, 0x2994); // LEFT ARC LESS-THAN BRACKET
        mirrorChars.put(0x2994, 0x2993); // RIGHT ARC GREATER-THAN BRACKET
        mirrorChars.put(0x2995, 0x2996); // DOUBLE LEFT ARC GREATER-THAN BRACKET
        mirrorChars.put(0x2996, 0x2995); // DOUBLE RIGHT ARC LESS-THAN BRACKET
        mirrorChars.put(0x2997, 0x2998); // LEFT BLACK TORTOISE SHELL BRACKET
        mirrorChars.put(0x2998, 0x2997); // RIGHT BLACK TORTOISE SHELL BRACKET
        mirrorChars.put(0x29B8, 0x2298); // CIRCLED REVERSE SOLIDUS
        mirrorChars.put(0x29C0, 0x29C1); // CIRCLED LESS-THAN
        mirrorChars.put(0x29C1, 0x29C0); // CIRCLED GREATER-THAN
        mirrorChars.put(0x29C4, 0x29C5); // SQUARED RISING DIAGONAL SLASH
        mirrorChars.put(0x29C5, 0x29C4); // SQUARED FALLING DIAGONAL SLASH
        mirrorChars.put(0x29CF, 0x29D0); // LEFT TRIANGLE BESIDE VERTICAL BAR
        mirrorChars.put(0x29D0, 0x29CF); // VERTICAL BAR BESIDE RIGHT TRIANGLE
        mirrorChars.put(0x29D1, 0x29D2); // BOWTIE WITH LEFT HALF BLACK
        mirrorChars.put(0x29D2, 0x29D1); // BOWTIE WITH RIGHT HALF BLACK
        mirrorChars.put(0x29D4, 0x29D5); // TIMES WITH LEFT HALF BLACK
        mirrorChars.put(0x29D5, 0x29D4); // TIMES WITH RIGHT HALF BLACK
        mirrorChars.put(0x29D8, 0x29D9); // LEFT WIGGLY FENCE
        mirrorChars.put(0x29D9, 0x29D8); // RIGHT WIGGLY FENCE
        mirrorChars.put(0x29DA, 0x29DB); // LEFT DOUBLE WIGGLY FENCE
        mirrorChars.put(0x29DB, 0x29DA); // RIGHT DOUBLE WIGGLY FENCE
        mirrorChars.put(0x29F5, 0x2215); // REVERSE SOLIDUS OPERATOR
        mirrorChars.put(0x29F8, 0x29F9); // BIG SOLIDUS
        mirrorChars.put(0x29F9, 0x29F8); // BIG REVERSE SOLIDUS
        mirrorChars.put(0x29FC, 0x29FD); // LEFT-POINTING CURVED ANGLE BRACKET
        mirrorChars.put(0x29FD, 0x29FC); // RIGHT-POINTING CURVED ANGLE BRACKET
        mirrorChars.put(0x2A2B, 0x2A2C); // MINUS SIGN WITH FALLING DOTS
        mirrorChars.put(0x2A2C, 0x2A2B); // MINUS SIGN WITH RISING DOTS
        mirrorChars.put(0x2A2D, 0x2A2C); // PLUS SIGN IN LEFT HALF CIRCLE
        mirrorChars.put(0x2A2E, 0x2A2D); // PLUS SIGN IN RIGHT HALF CIRCLE
        mirrorChars.put(0x2A34, 0x2A35); // MULTIPLICATION SIGN IN LEFT HALF CIRCLE
        mirrorChars.put(0x2A35, 0x2A34); // MULTIPLICATION SIGN IN RIGHT HALF CIRCLE
        mirrorChars.put(0x2A3C, 0x2A3D); // INTERIOR PRODUCT
        mirrorChars.put(0x2A3D, 0x2A3C); // RIGHTHAND INTERIOR PRODUCT
        mirrorChars.put(0x2A64, 0x2A65); // Z NOTATION DOMAIN ANTIRESTRICTION
        mirrorChars.put(0x2A65, 0x2A64); // Z NOTATION RANGE ANTIRESTRICTION
        mirrorChars.put(0x2A79, 0x2A7A); // LESS-THAN WITH CIRCLE INSIDE
        mirrorChars.put(0x2A7A, 0x2A79); // GREATER-THAN WITH CIRCLE INSIDE
        mirrorChars.put(0x2A7D, 0x2A7E); // LESS-THAN OR SLANTED EQUAL TO
        mirrorChars.put(0x2A7E, 0x2A7D); // GREATER-THAN OR SLANTED EQUAL TO
        mirrorChars.put(0x2A7F, 0x2A80); // LESS-THAN OR SLANTED EQUAL TO WITH DOT INSIDE
        mirrorChars.put(0x2A80, 0x2A7F); // GREATER-THAN OR SLANTED EQUAL TO WITH DOT INSIDE
        mirrorChars.put(0x2A81, 0x2A82); // LESS-THAN OR SLANTED EQUAL TO WITH DOT ABOVE
        mirrorChars.put(0x2A82, 0x2A81); // GREATER-THAN OR SLANTED EQUAL TO WITH DOT ABOVE
        mirrorChars.put(0x2A83, 0x2A84); // LESS-THAN OR SLANTED EQUAL TO WITH DOT ABOVE RIGHT
        mirrorChars.put(0x2A84, 0x2A83); // GREATER-THAN OR SLANTED EQUAL TO WITH DOT ABOVE LEFT
        mirrorChars.put(0x2A8B, 0x2A8C); // LESS-THAN ABOVE DOUBLE-LINE EQUAL ABOVE GREATER-THAN
        mirrorChars.put(0x2A8C, 0x2A8B); // GREATER-THAN ABOVE DOUBLE-LINE EQUAL ABOVE LESS-THAN
        mirrorChars.put(0x2A91, 0x2A92); // LESS-THAN ABOVE GREATER-THAN ABOVE DOUBLE-LINE EQUAL
        mirrorChars.put(0x2A92, 0x2A91); // GREATER-THAN ABOVE LESS-THAN ABOVE DOUBLE-LINE EQUAL
        mirrorChars.put(0x2A93, 0x2A94); // LESS-THAN ABOVE SLANTED EQUAL ABOVE GREATER-THAN ABOVE SLANTED EQUAL
        mirrorChars.put(0x2A94, 0x2A93); // GREATER-THAN ABOVE SLANTED EQUAL ABOVE LESS-THAN ABOVE SLANTED EQUAL
        mirrorChars.put(0x2A95, 0x2A96); // SLANTED EQUAL TO OR LESS-THAN
        mirrorChars.put(0x2A96, 0x2A95); // SLANTED EQUAL TO OR GREATER-THAN
        mirrorChars.put(0x2A97, 0x2A98); // SLANTED EQUAL TO OR LESS-THAN WITH DOT INSIDE
        mirrorChars.put(0x2A98, 0x2A97); // SLANTED EQUAL TO OR GREATER-THAN WITH DOT INSIDE
        mirrorChars.put(0x2A99, 0x2A9A); // DOUBLE-LINE EQUAL TO OR LESS-THAN
        mirrorChars.put(0x2A9A, 0x2A99); // DOUBLE-LINE EQUAL TO OR GREATER-THAN
        mirrorChars.put(0x2A9B, 0x2A9C); // DOUBLE-LINE SLANTED EQUAL TO OR LESS-THAN
        mirrorChars.put(0x2A9C, 0x2A9B); // DOUBLE-LINE SLANTED EQUAL TO OR GREATER-THAN
        mirrorChars.put(0x2AA1, 0x2AA2); // DOUBLE NESTED LESS-THAN
        mirrorChars.put(0x2AA2, 0x2AA1); // DOUBLE NESTED GREATER-THAN
        mirrorChars.put(0x2AA6, 0x2AA7); // LESS-THAN CLOSED BY CURVE
        mirrorChars.put(0x2AA7, 0x2AA6); // GREATER-THAN CLOSED BY CURVE
        mirrorChars.put(0x2AA8, 0x2AA9); // LESS-THAN CLOSED BY CURVE ABOVE SLANTED EQUAL
        mirrorChars.put(0x2AA9, 0x2AA8); // GREATER-THAN CLOSED BY CURVE ABOVE SLANTED EQUAL
        mirrorChars.put(0x2AAA, 0x2AAB); // SMALLER THAN
        mirrorChars.put(0x2AAB, 0x2AAA); // LARGER THAN
        mirrorChars.put(0x2AAC, 0x2AAD); // SMALLER THAN OR EQUAL TO
        mirrorChars.put(0x2AAD, 0x2AAC); // LARGER THAN OR EQUAL TO
        mirrorChars.put(0x2AAF, 0x2AB0); // PRECEDES ABOVE SINGLE-LINE EQUALS SIGN
        mirrorChars.put(0x2AB0, 0x2AAF); // SUCCEEDS ABOVE SINGLE-LINE EQUALS SIGN
        mirrorChars.put(0x2AB3, 0x2AB4); // PRECEDES ABOVE EQUALS SIGN
        mirrorChars.put(0x2AB4, 0x2AB3); // SUCCEEDS ABOVE EQUALS SIGN
        mirrorChars.put(0x2ABB, 0x2ABC); // DOUBLE PRECEDES
        mirrorChars.put(0x2ABC, 0x2ABB); // DOUBLE SUCCEEDS
        mirrorChars.put(0x2ABD, 0x2ABE); // SUBSET WITH DOT
        mirrorChars.put(0x2ABE, 0x2ABD); // SUPERSET WITH DOT
        mirrorChars.put(0x2ABF, 0x2AC0); // SUBSET WITH PLUS SIGN BELOW
        mirrorChars.put(0x2AC0, 0x2ABF); // SUPERSET WITH PLUS SIGN BELOW
        mirrorChars.put(0x2AC1, 0x2AC2); // SUBSET WITH MULTIPLICATION SIGN BELOW
        mirrorChars.put(0x2AC2, 0x2AC1); // SUPERSET WITH MULTIPLICATION SIGN BELOW
        mirrorChars.put(0x2AC3, 0x2AC4); // SUBSET OF OR EQUAL TO WITH DOT ABOVE
        mirrorChars.put(0x2AC4, 0x2AC3); // SUPERSET OF OR EQUAL TO WITH DOT ABOVE
        mirrorChars.put(0x2AC5, 0x2AC6); // SUBSET OF ABOVE EQUALS SIGN
        mirrorChars.put(0x2AC6, 0x2AC5); // SUPERSET OF ABOVE EQUALS SIGN
        mirrorChars.put(0x2ACD, 0x2ACE); // SQUARE LEFT OPEN BOX OPERATOR
        mirrorChars.put(0x2ACE, 0x2ACD); // SQUARE RIGHT OPEN BOX OPERATOR
        mirrorChars.put(0x2ACF, 0x2AD0); // CLOSED SUBSET
        mirrorChars.put(0x2AD0, 0x2ACF); // CLOSED SUPERSET
        mirrorChars.put(0x2AD1, 0x2AD2); // CLOSED SUBSET OR EQUAL TO
        mirrorChars.put(0x2AD2, 0x2AD1); // CLOSED SUPERSET OR EQUAL TO
        mirrorChars.put(0x2AD3, 0x2AD4); // SUBSET ABOVE SUPERSET
        mirrorChars.put(0x2AD4, 0x2AD3); // SUPERSET ABOVE SUBSET
        mirrorChars.put(0x2AD5, 0x2AD6); // SUBSET ABOVE SUBSET
        mirrorChars.put(0x2AD6, 0x2AD5); // SUPERSET ABOVE SUPERSET
        mirrorChars.put(0x2ADE, 0x22A6); // SHORT LEFT TACK
        mirrorChars.put(0x2AE3, 0x22A9); // DOUBLE VERTICAL BAR LEFT TURNSTILE
        mirrorChars.put(0x2AE4, 0x22A8); // VERTICAL BAR DOUBLE LEFT TURNSTILE
        mirrorChars.put(0x2AE5, 0x22AB); // DOUBLE VERTICAL BAR DOUBLE LEFT TURNSTILE
        mirrorChars.put(0x2AEC, 0x2AED); // DOUBLE STROKE NOT SIGN
        mirrorChars.put(0x2AED, 0x2AEC); // REVERSED DOUBLE STROKE NOT SIGN
        mirrorChars.put(0x2AF7, 0x2AF8); // TRIPLE NESTED LESS-THAN
        mirrorChars.put(0x2AF8, 0x2AF7); // TRIPLE NESTED GREATER-THAN
        mirrorChars.put(0x2AF9, 0x2AFA); // DOUBLE-LINE SLANTED LESS-THAN OR EQUAL TO
        mirrorChars.put(0x2AFA, 0x2AF9); // DOUBLE-LINE SLANTED GREATER-THAN OR EQUAL TO
        mirrorChars.put(0x3008, 0x3009); // LEFT ANGLE BRACKET
        mirrorChars.put(0x3009, 0x3008); // RIGHT ANGLE BRACKET
        mirrorChars.put(0x300A, 0x300B); // LEFT DOUBLE ANGLE BRACKET
        mirrorChars.put(0x300B, 0x300A); // RIGHT DOUBLE ANGLE BRACKET
        mirrorChars.put(0x300C, 0x300D); // [BEST FIT] LEFT CORNER BRACKET
        mirrorChars.put(0x300D, 0x300C); // [BEST FIT] RIGHT CORNER BRACKET
        mirrorChars.put(0x300E, 0x300F); // [BEST FIT] LEFT WHITE CORNER BRACKET
        mirrorChars.put(0x300F, 0x300E); // [BEST FIT] RIGHT WHITE CORNER BRACKET
        mirrorChars.put(0x3010, 0x3011); // LEFT BLACK LENTICULAR BRACKET
        mirrorChars.put(0x3011, 0x3010); // RIGHT BLACK LENTICULAR BRACKET
        mirrorChars.put(0x3014, 0x3015); // LEFT TORTOISE SHELL BRACKET
        mirrorChars.put(0x3015, 0x3014); // RIGHT TORTOISE SHELL BRACKET
        mirrorChars.put(0x3016, 0x3017); // LEFT WHITE LENTICULAR BRACKET
        mirrorChars.put(0x3017, 0x3016); // RIGHT WHITE LENTICULAR BRACKET
        mirrorChars.put(0x3018, 0x3019); // LEFT WHITE TORTOISE SHELL BRACKET
        mirrorChars.put(0x3019, 0x3018); // RIGHT WHITE TORTOISE SHELL BRACKET
        mirrorChars.put(0x301A, 0x301B); // LEFT WHITE SQUARE BRACKET
        mirrorChars.put(0x301B, 0x301A); // RIGHT WHITE SQUARE BRACKET
        mirrorChars.put(0xFF08, 0xFF09); // FULLWIDTH LEFT PARENTHESIS
        mirrorChars.put(0xFF09, 0xFF08); // FULLWIDTH RIGHT PARENTHESIS
        mirrorChars.put(0xFF1C, 0xFF1E); // FULLWIDTH LESS-THAN SIGN
        mirrorChars.put(0xFF1E, 0xFF1C); // FULLWIDTH GREATER-THAN SIGN
        mirrorChars.put(0xFF3B, 0xFF3D); // FULLWIDTH LEFT SQUARE BRACKET
        mirrorChars.put(0xFF3D, 0xFF3B); // FULLWIDTH RIGHT SQUARE BRACKET
        mirrorChars.put(0xFF5B, 0xFF5D); // FULLWIDTH LEFT CURLY BRACKET
        mirrorChars.put(0xFF5D, 0xFF5B); // FULLWIDTH RIGHT CURLY BRACKET
        mirrorChars.put(0xFF5F, 0xFF60); // FULLWIDTH LEFT WHITE PARENTHESIS
        mirrorChars.put(0xFF60, 0xFF5F); // FULLWIDTH RIGHT WHITE PARENTHESIS
        mirrorChars.put(0xFF62, 0xFF63); // [BEST FIT] HALFWIDTH LEFT CORNER BRACKET
        mirrorChars.put(0xFF63, 0xFF62); // [BEST FIT] HALFWIDTH RIGHT CORNER BRACKET
    }
    
    /**
     * Method that changes a String with Arabic characters into a String in which the ligatures are made.
     * @param s	the original String
     * @param runDirection
     * @param arabicOptions
     * @return the String with the ligatures
     */
    public static String processLTR(String s, int runDirection, int arabicOptions) {
    	BidiLine bidi = new BidiLine();
    	bidi.addChunk(new PdfChunk(new Chunk(s), null));
    	bidi.arabicOptions = arabicOptions;
    	bidi.getParagraph(runDirection);
    	ArrayList<PdfChunk> arr = bidi.createArrayOfPdfChunks(0, bidi.totalTextLength - 1);
    	StringBuilder sb = new StringBuilder();
    	for (PdfChunk ck : arr) {
    		sb.append(ck.toString());
    	}
    	return sb.toString();
    }
}
