Замена TextNormalize в Apache PDFBox 2.0? ⇐ JAVA

[Anonymous]

Наш отдел унаследовал код, использующий Apache PDFBox 1.8.x или более раннюю версию, и мы пытаемся перенести его на Apache PDFBox 2.0.x. Есть части кода, использующие TextNormalize, но я не могу найти упоминания об этом в документации Java 2.0. Я также не нашел никаких упоминаний об этом в руководстве по миграции на PDFBox 2.0.0.

Кажется, я не могу найти никакой информации о том, как изменяется этот класс. или замена TextNormalize. Есть ли у кого-нибудь предложения о том, как это следует заменить в Apache PDFBox 2.0?

В основном мы создаем объект TextNormalize как часть конструктора нашего класса, который расширяет PDFStreamEngine и единственное место в коде, где он используется для объединения/вставки диакритических знаков.

/**
* Merge a single character TextPosition into the current object.
* This is to be used only for cases where we have a diacritic that
* overlaps an existing TextPosition. In a graphical display, we could
* overlay them, but for text extraction we need to merge them. Use the
* contains() method to test if two objects overlap.
*
* @param diacritic TextPosition to merge into the current TextPosition.
* @param normalize Instance of TextNormalize class to be used to normalize diacritic
*/
public void mergeDiacritic(TextPosition diacritic, TextNormalize normalize)
{
if (diacritic.getCharacter().length() > 1)
{
return;
}

float diacXStart = diacritic.getXDirAdj();
float diacXEnd = diacXStart + diacritic.widths[0];

float currCharXStart = getXDirAdj();

int strLen = str.length();
boolean wasAdded = false;

for (int i = 0; i < strLen && !wasAdded; i++)
{
float currCharXEnd = currCharXStart + widths;

/*
* This is the case where there is an overlap of the diacritic character with
* the current character and the previous character. If no previous character,
* just append the diacritic after the current one.
*/
if(diacXStart < currCharXStart && diacXEnd = percentage2)
{
insertDiacritic(i, diacritic, normalize);
}
else
{
insertDiacritic(i-1, diacritic, normalize);
}
}
wasAdded = true;
}
//diacritic completely covers this character and therefore we assume that
//this is the character the diacritic belongs to
else if(diacXStart < currCharXStart && diacXEnd > currCharXEnd)
{
insertDiacritic(i, diacritic, normalize);
wasAdded = true;
}
//Otherwise, The diacritic modifies this character because its completely
//contained by the character width
else if(diacXStart >= currCharXStart && diacXEnd = currCharXStart && diacXEnd > currCharXEnd && i == (strLen - 1))
{
insertDiacritic(i, diacritic, normalize);
wasAdded = true;
}
/*
* Couldn't find anything useful so we go to the next character in the
* TextPosition
*/
currCharXStart += widths;
}
}


и

/**
* Inserts the diacritic TextPosition to the str of this TextPosition
* and updates the widths array to include the extra character width.
* @param i current character
* @param diacritic The diacritic TextPosition
* @param normalize Instance of TextNormalize class to be used to normalize diacritic
*/
private void insertDiacritic(int i, TextPosition diacritic, TextNormalize normalize)
{
/* we add the diacritic to the right or left of the character
* depending on the direction of the character. Note that this
* is only required because the text is currently stored in
* presentation order and not in logical order.
*/
int dir = Character.getDirectionality(str.charAt(i));
StringBuffer buf = new StringBuffer();

buf.append(str.substring(0,i));

float[] widths2 = new float[widths.length+1];
System.arraycopy(widths, 0, widths2, 0, i);

if ((dir == Character.DIRECTIONALITY_RIGHT_TO_LEFT)
|| (dir == Character.DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC)
|| (dir == Character.DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING)
|| (dir == Character.DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE))
{
buf.append(normalize.normalizeDiac(diacritic.getCharacter()));
widths2 = 0;
buf.append(str.charAt(i));
widths2[i+1] = widths;
}
else
{
buf.append(str.charAt(i));
widths2 = widths;
buf.append(normalize.normalizeDiac(diacritic.getCharacter()));
widths2[i+1] = 0;
}

// Get the rest of the string
buf.append(str.substring(i+1, str.length()));
System.arraycopy(widths, i+1, widths2, i+2, widths.length-i-1);

str = buf.toString();
widths = widths2;
}


Подробнее здесь: https://stackoverflow.com/questions/402 ... pdfbox-2-0