com.lowagie.text.pdf.FontSelector Maven / Gradle / Ivy
/*
* Copyright 2003 by Paulo Soares.
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library 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 Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* https://github.com/LibrePDF/OpenPDF
*/
package com.lowagie.text.pdf;
import java.util.ArrayList;
import com.lowagie.text.error_messages.MessageLocalization;
import com.lowagie.text.Chunk;
import com.lowagie.text.Font;
import com.lowagie.text.Phrase;
import com.lowagie.text.Utilities;
/** Selects the appropriate fonts that contain the glyphs needed to
* render text correctly. The fonts are checked in order until the
* character is found.
*
* The built in fonts "Symbol" and "ZapfDingbats", if used, have a special encoding
* to allow the characters to be referred by Unicode.
* @author Paulo Soares ([email protected])
*/
public class FontSelector {
protected ArrayList fonts = new ArrayList<>();
/**
* Adds a Font to be searched for valid characters.
* @param font the Font
*/
public void addFont(Font font) {
if (font.getBaseFont() != null) {
fonts.add(font);
return;
}
BaseFont bf = font.getCalculatedBaseFont(true);
Font f2 = new Font(bf, font.getSize(), font.getCalculatedStyle(), font.getColor());
fonts.add(f2);
}
/**
* Process the text so that it will render with a combination of fonts
* if needed.
* @param text the text
* @return a Phrase with one or more chunks
*/
public Phrase process(String text) {
int fsize = fonts.size();
if (fsize == 0)
throw new IndexOutOfBoundsException(MessageLocalization.getComposedMessage("no.font.is.defined"));
char[] cc = text.toCharArray();
int len = cc.length;
StringBuilder sb = new StringBuilder();
Font font = null;
int lastidx = -1;
Phrase ret = new Phrase();
for (int k = 0; k < len; ++k) {
char c = cc[k];
if (c == '\n' || c == '\r') {
sb.append(c);
continue;
}
if (Utilities.isSurrogatePair(cc, k)) {
int u = Utilities.convertToUtf32(cc, k);
boolean hasValidFontInList = false;
for (int f = 0; f < fsize; ++f) {
font = fonts.get(f);
if (font.getBaseFont().charExists(u)) {
if (lastidx != f) {
if (sb.length() > 0 && lastidx != -1) {
Chunk ck = new Chunk(sb.toString(), fonts.get(lastidx));
ret.add(ck);
sb.setLength(0);
}
lastidx = f;
}
sb.append(c);
if (cc.length > k + 1) {
sb.append(cc[++k]);
}
hasValidFontInList = true;
break;
}
}
if (!hasValidFontInList) {
if (sb.length() > 0 && lastidx != -1) {
Chunk ck = new Chunk(sb.toString());
ret.add(ck);
sb.setLength(0);
lastidx = -1;
}
sb.append(c);
if (cc.length > k + 1) {
sb.append(cc[++k]);
}
}
} else {
boolean hasValidFontInList = false;
for (int f = 0; f < fsize; ++f) {
font = fonts.get(f);
if (font.getBaseFont().charExists(c)) {
if (lastidx != f) {
if (sb.length() > 0 && lastidx != -1) {
Chunk ck = new Chunk(sb.toString(), fonts.get(lastidx));
ret.add(ck);
sb.setLength(0);
}
lastidx = f;
}
sb.append(c);
hasValidFontInList = true;
break;
}
}
if (!hasValidFontInList) {
if (sb.length() > 0 && lastidx != -1) {
Chunk ck = new Chunk(sb.toString());
ret.add(ck);
sb.setLength(0);
lastidx = -1;
}
sb.append(c);
}
}
}
if (sb.length() > 0) {
Chunk ck;
if (lastidx == -1) {
ck = new Chunk(sb.toString());
} else {
ck = new Chunk(sb.toString(), fonts.get(lastidx));
}
ret.add(ck);
}
return ret;
}
}