com.itextpdf.text.pdf.DefaultSplitCharacter Maven / Gradle / Ivy
/*
* $Id: 9ae46e5fc0ece0feb35fee1c11a4c7a2d6abca87 $
*
* This file is part of the iText (R) project.
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* Authors: Bruno Lowagie, Paulo Soares, et al.
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package com.itextpdf.text.pdf;
import com.itextpdf.text.SplitCharacter;
/**
*
* The default class that is used to determine whether or not a character
* is a split character.
*
* You can add an array of characters or a single character on which iText
* should split the chunk. If custom characters have been set, iText will ignore
* the default characters this class uses to split chunks.
*
* @since 2.1.2
*/
public class DefaultSplitCharacter implements SplitCharacter {
/**
* An instance of the default SplitCharacter.
*/
public static final SplitCharacter DEFAULT = new DefaultSplitCharacter();
protected char[] characters;
/**
* Default constructor, has no custom characters to check.
*/
public DefaultSplitCharacter() {
// empty body
}
/**
* Constructor with one splittable character.
*
* @param character char
*/
public DefaultSplitCharacter(char character) {
this(new char[]{character});
}
/**
* Constructor with an array of splittable characters
*
* @param characters char[]
*/
public DefaultSplitCharacter(char[] characters) {
this.characters = characters;
}
/**
*
* Checks if a character can be used to split a PdfString.
*
*
* The default behavior is that every character less than or equal to SPACE, the character '-'
* and some specific unicode ranges are 'splitCharacters'.
*
*
* If custom splittable characters are set using the specified constructors,
* then this class will ignore the default characters described in the
* previous paragraph.
*
*
* @param start start position in the array
* @param current current position in the array
* @param end end position in the array
* @param ck chunk array
* @param cc the character array that has to be checked
* @return true if the character can be used to split a string, false otherwise
*/
public boolean isSplitCharacter(int start, int current, int end, char[] cc, PdfChunk[] ck) {
char c = getCurrentCharacter(current, cc, ck);
if (characters != null) {
for (int i = 0; i < characters.length; i++) {
if (c == characters[i]) {
return true;
}
}
return false;
}
if (c <= ' ' || c == '-' || c == '\u2010') {
return true;
}
if (c < 0x2002)
return false;
return ((c >= 0x2002 && c <= 0x200b)
|| (c >= 0x2e80 && c < 0xd7a0)
|| (c >= 0xf900 && c < 0xfb00)
|| (c >= 0xfe30 && c < 0xfe50)
|| (c >= 0xff61 && c < 0xffa0));
}
/**
* Returns the current character
*
* @param current current position in the array
* @param ck chunk array
* @param cc the character array that has to be checked
* @return the current character
*/
protected char getCurrentCharacter(int current, char[] cc, PdfChunk[] ck) {
if (ck == null) {
return cc[current];
}
return (char) ck[Math.min(current, ck.length - 1)].getUnicodeEquivalent(cc[current]);
}
}