Java tutorial
/* * 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: * http://www.lowagie.com/iText/ */ package com.lowagie.text.pdf; import java.util.ArrayList; 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. * <p> * 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 (psoares@consiste.pt) */ public class FontSelector { protected ArrayList fonts = new ArrayList(); /** * Adds a <CODE>Font</CODE> to be searched for valid characters. * @param font the <CODE>Font</CODE> */ 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 <CODE>Phrase</CODE> with one or more chunks */ public Phrase process(String text) { int fsize = fonts.size(); if (fsize == 0) throw new IndexOutOfBoundsException("No font is defined."); char cc[] = text.toCharArray(); int len = cc.length; StringBuffer sb = new StringBuffer(); 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); for (int f = 0; f < fsize; ++f) { font = (Font) fonts.get(f); if (font.getBaseFont().charExists(u)) { if (lastidx != f) { if (sb.length() > 0 && lastidx != -1) { Chunk ck = new Chunk(sb.toString(), (Font) fonts.get(lastidx)); ret.add(ck); sb.setLength(0); } lastidx = f; } sb.append(c); sb.append(cc[++k]); break; } } } else { for (int f = 0; f < fsize; ++f) { font = (Font) fonts.get(f); if (font.getBaseFont().charExists(c)) { if (lastidx != f) { if (sb.length() > 0 && lastidx != -1) { Chunk ck = new Chunk(sb.toString(), (Font) fonts.get(lastidx)); ret.add(ck); sb.setLength(0); } lastidx = f; } sb.append(c); break; } } } } if (sb.length() > 0) { Chunk ck = new Chunk(sb.toString(), (Font) fonts.get(lastidx == -1 ? 0 : lastidx)); ret.add(ck); } return ret; } }