Review

finding-9

/mubench/checkouts/itext/5091/build/src/main/java/com/itextpdf/text/pdf/PdfChunk.java

split(float)

class PdfChunk {
    PdfChunk split(float width) {
        newlineSplit = false;
        if (image != null) {
            if (image.getScaledWidth() > width) {
                PdfChunk pc = new PdfChunk(Chunk.OBJECT_REPLACEMENT_CHARACTER, this);
                value = "";
                attributes = new HashMap<String, Object>();
                image = null;
                font = PdfFont.getDefaultFont();
                return pc;
            }
            else
                return null;
        }
        HyphenationEvent hyphenationEvent = (HyphenationEvent)noStroke.get(Chunk.HYPHENATION);
        int currentPosition = 0;
        int splitPosition = -1;
        float currentWidth = 0;

        // loop over all the characters of a string
        // or until the totalWidth is reached
        int lastSpace = -1;
        float lastSpaceWidth = 0;
        int length = value.length();
        char valueArray[] = value.toCharArray();
        char character = 0;
        BaseFont ft = font.getFont();
        boolean surrogate = false;
        if (ft.getFontType() == BaseFont.FONT_TYPE_CJK && ft.getUnicodeEquivalent(' ') != ' ') {
            while (currentPosition < length) {
                // the width of every character is added to the currentWidth
                char cidChar = valueArray[currentPosition];
                character = (char)ft.getUnicodeEquivalent(cidChar);
                // if a newLine or carriageReturn is encountered
                if (character == '\n') {
                    newlineSplit = true;
                    String returnValue = value.substring(currentPosition + 1);
                    value = value.substring(0, currentPosition);
                    if (value.length() < 1) {
                        value = "\u0001";
                    }
                    PdfChunk pc = new PdfChunk(returnValue, this);
                    return pc;
                }
                currentWidth += getCharWidth(cidChar);
                if (character == ' ') {
                    lastSpace = currentPosition + 1;
                    lastSpaceWidth = currentWidth;
                }
                if (currentWidth > width)
                    break;
                // if a split-character is encountered, the splitPosition is altered
                if (splitCharacter.isSplitCharacter(0, currentPosition, length, valueArray, thisChunk))
                    splitPosition = currentPosition + 1;
                currentPosition++;
            }
        }
        else {
            while (currentPosition < length) {
                // the width of every character is added to the currentWidth
                character = valueArray[currentPosition];
                // if a newLine or carriageReturn is encountered
                if (character == '\r' || character == '\n') {
                    newlineSplit = true;
                    int inc = 1;
                    if (character == '\r' && currentPosition + 1 < length && valueArray[currentPosition + 1] == '\n')
                        inc = 2;
                    String returnValue = value.substring(currentPosition + inc);
                    value = value.substring(0, currentPosition);
                    if (value.length() < 1) {
                        value = " ";
                    }
                    PdfChunk pc = new PdfChunk(returnValue, this);
                    return pc;
                }
                surrogate = Utilities.isSurrogatePair(valueArray, currentPosition);
                if (surrogate)
                    currentWidth += getCharWidth(Utilities.convertToUtf32(valueArray[currentPosition], valueArray[currentPosition + 1]));
                else
                    currentWidth += getCharWidth(character);
                if (character == ' ') {
                    lastSpace = currentPosition + 1;
                    lastSpaceWidth = currentWidth;
                }
                if (surrogate)
                    currentPosition++;
                if (currentWidth > width)
                    break;
                // if a split-character is encountered, the splitPosition is altered
                if (splitCharacter.isSplitCharacter(0, currentPosition, length, valueArray, null))
                    splitPosition = currentPosition + 1;
                currentPosition++;
            }
        }

        // if all the characters fit in the total width, null is returned (there is no overflow)
        if (currentPosition == length) {
            return null;
        }
        // otherwise, the string has to be truncated
        if (splitPosition < 0) {
            String returnValue = value;
            value = "";
            PdfChunk pc = new PdfChunk(returnValue, this);
            return pc;
        }
        if (lastSpace > splitPosition && splitCharacter.isSplitCharacter(0, 0, 1, singleSpace, null))
            splitPosition = lastSpace;
        if (hyphenationEvent != null && lastSpace >= 0 && lastSpace < currentPosition) {
            int wordIdx = getWord(value, lastSpace);
            if (wordIdx > lastSpace) {
                String pre = hyphenationEvent.getHyphenatedWordPre(value.substring(lastSpace, wordIdx), font.getFont(), font.size(), width - lastSpaceWidth);
                String post = hyphenationEvent.getHyphenatedWordPost();
                if (pre.length() > 0) {
                    String returnValue = post + value.substring(wordIdx);
                    value = trim(value.substring(0, lastSpace) + pre);
                    PdfChunk pc = new PdfChunk(returnValue, this);
                    return pc;
                }
            }
        }
        String returnValue = value.substring(splitPosition);
        value = trim(value.substring(0, splitPosition));
        PdfChunk pc = new PdfChunk(returnValue, this);
        return pc;
    }

}