145 lines
6.1 KiB
C#
145 lines
6.1 KiB
C#
using System;
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using System.Collections;
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using System.Text;
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using iTextSharp.text;
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/*
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* Copyright 2003 by Paulo Soares.
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* (the "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the License.
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*
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* The Original Code is 'iText, a free JAVA-PDF library'.
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*
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* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
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* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
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* All Rights Reserved.
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* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
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* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
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*
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* Contributor(s): all the names of the contributors are added in the source code
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* where applicable.
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*
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* Alternatively, the contents of this file may be used under the terms of the
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* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
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* provisions of LGPL are applicable instead of those above. If you wish to
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* allow use of your version of this file only under the terms of the LGPL
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* License and not to allow others to use your version of this file under
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* the MPL, indicate your decision by deleting the provisions above and
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* replace them with the notice and other provisions required by the LGPL.
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* If you do not delete the provisions above, a recipient may use your version
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* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
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*
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the MPL as stated above or under the terms of the GNU
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* Library General Public License as published by the Free Software Foundation;
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* either version 2 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
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* details.
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*
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* If you didn't download this code from the following link, you should check if
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* you aren't using an obsolete version:
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* http://www.lowagie.com/iText/
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*/
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namespace iTextSharp.text.pdf {
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/** Selects the appropriate fonts that contain the glyphs needed to
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* render text correctly. The fonts are checked in order until the
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* character is found.
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* <p>
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* The built in fonts "Symbol" and "ZapfDingbats", if used, have a special encoding
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* to allow the characters to be referred by Unicode.
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* @author Paulo Soares (psoares@consiste.pt)
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*/
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public class FontSelector {
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protected ArrayList fonts = new ArrayList();
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/**
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* Adds a <CODE>Font</CODE> to be searched for valid characters.
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* @param font the <CODE>Font</CODE>
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*/
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public void AddFont(Font font) {
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if (font.BaseFont != null) {
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fonts.Add(font);
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return;
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}
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BaseFont bf = font.GetCalculatedBaseFont(true);
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Font f2 = new Font(bf, font.Size, font.CalculatedStyle, font.Color);
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fonts.Add(f2);
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}
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/**
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* Process the text so that it will render with a combination of fonts
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* if needed.
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* @param text the text
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* @return a <CODE>Phrase</CODE> with one or more chunks
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*/
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public Phrase Process(String text) {
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int fsize = fonts.Count;
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if (fsize == 0)
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throw new ArgumentException("No font is defined.");
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char[] cc = text.ToCharArray();
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int len = cc.Length;
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StringBuilder sb = new StringBuilder();
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Font font = null;
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int lastidx = -1;
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Phrase ret = new Phrase();
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for (int k = 0; k < len; ++k) {
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char c = cc[k];
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if (c == '\n' || c == '\r') {
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sb.Append(c);
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continue;
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}
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if (Utilities.IsSurrogatePair(cc, k)) {
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int u = Utilities.ConvertToUtf32(cc, k);
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for (int f = 0; f < fsize; ++f) {
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font = (Font)fonts[f];
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if (font.BaseFont.CharExists(u)) {
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if (lastidx != f) {
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if (sb.Length > 0 && lastidx != -1) {
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Chunk ck = new Chunk(sb.ToString(), (Font)fonts[lastidx]);
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ret.Add(ck);
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sb.Length = 0;
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}
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lastidx = f;
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}
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sb.Append(c);
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sb.Append(cc[++k]);
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break;
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}
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}
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}
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else {
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for (int f = 0; f < fsize; ++f) {
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font = (Font)fonts[f];
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if (font.BaseFont.CharExists(c)) {
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if (lastidx != f) {
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if (sb.Length > 0 && lastidx != -1) {
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Chunk ck = new Chunk(sb.ToString(), (Font)fonts[lastidx]);
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ret.Add(ck);
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sb.Length = 0;
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}
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lastidx = f;
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}
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sb.Append(c);
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break;
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}
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}
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}
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}
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if (sb.Length > 0) {
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Chunk ck = new Chunk(sb.ToString(), (Font)fonts[lastidx == -1 ? 0 : lastidx]);
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ret.Add(ck);
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}
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return ret;
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}
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}
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} |