646 lines
23 KiB
C#
646 lines
23 KiB
C#
using System;
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using System.IO;
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using System.Text;
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using System.Collections;
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using System.util;
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/*
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* $Id: CJKFont.cs,v 1.9 2008/05/13 11:25:17 psoares33 Exp $
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*
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*
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* Copyright 2000, 2001, 2002 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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/**
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* Creates a CJK font compatible with the fonts in the Adobe Asian font Pack.
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*
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* @author Paulo Soares (psoares@consiste.pt)
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*/
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internal class CJKFont : BaseFont {
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/** The encoding used in the PDF document for CJK fonts
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*/
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internal const string CJK_ENCODING = "UNICODEBIGUNMARKED";
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private const int FIRST = 0;
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private const int BRACKET = 1;
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private const int SERIAL = 2;
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private const int V1Y = 880;
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internal static Properties cjkFonts = new Properties();
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internal static Properties cjkEncodings = new Properties();
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internal static Hashtable allCMaps = Hashtable.Synchronized(new Hashtable());
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internal static Hashtable allFonts = Hashtable.Synchronized(new Hashtable());
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private static bool propertiesLoaded = false;
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/** The font name */
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private string fontName;
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/** The style modifier */
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private string style = "";
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/** The CMap name associated with this font */
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private string CMap;
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private bool cidDirect = false;
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private char[] translationMap;
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private IntHashtable vMetrics;
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private IntHashtable hMetrics;
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private Hashtable fontDesc;
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private bool vertical = false;
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private static void LoadProperties() {
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if (propertiesLoaded)
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return;
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lock (allFonts) {
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if (propertiesLoaded)
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return;
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try {
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Stream isp = GetResourceStream(RESOURCE_PATH + "cjkfonts.properties");
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cjkFonts.Load(isp);
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isp.Close();
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isp = GetResourceStream(RESOURCE_PATH + "cjkencodings.properties");
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cjkEncodings.Load(isp);
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isp.Close();
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}
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catch {
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cjkFonts = new Properties();
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cjkEncodings = new Properties();
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}
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propertiesLoaded = true;
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}
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}
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/** Creates a CJK font.
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* @param fontName the name of the font
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* @param enc the encoding of the font
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* @param emb always <CODE>false</CODE>. CJK font and not embedded
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* @throws DocumentException on error
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* @throws IOException on error
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*/
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internal CJKFont(string fontName, string enc, bool emb) {
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LoadProperties();
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this.FontType = FONT_TYPE_CJK;
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string nameBase = GetBaseName(fontName);
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if (!IsCJKFont(nameBase, enc))
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throw new DocumentException("Font '" + fontName + "' with '" + enc + "' encoding is not a CJK font.");
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if (nameBase.Length < fontName.Length) {
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style = fontName.Substring(nameBase.Length);
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fontName = nameBase;
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}
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this.fontName = fontName;
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encoding = CJK_ENCODING;
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vertical = enc.EndsWith("V");
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CMap = enc;
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if (enc.StartsWith("Identity-")) {
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cidDirect = true;
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string s = cjkFonts[fontName];
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s = s.Substring(0, s.IndexOf('_'));
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char[] c = (char[])allCMaps[s];
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if (c == null) {
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c = ReadCMap(s);
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if (c == null)
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throw new DocumentException("The cmap " + s + " does not exist as a resource.");
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c[CID_NEWLINE] = '\n';
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allCMaps.Add(s, c);
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}
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translationMap = c;
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}
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else {
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char[] c = (char[])allCMaps[enc];
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if (c == null) {
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string s = cjkEncodings[enc];
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if (s == null)
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throw new DocumentException("The resource cjkencodings.properties does not contain the encoding " + enc);
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StringTokenizer tk = new StringTokenizer(s);
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string nt = tk.NextToken();
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c = (char[])allCMaps[nt];
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if (c == null) {
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c = ReadCMap(nt);
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allCMaps.Add(nt, c);
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}
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if (tk.HasMoreTokens()) {
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string nt2 = tk.NextToken();
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char[] m2 = ReadCMap(nt2);
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for (int k = 0; k < 0x10000; ++k) {
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if (m2[k] == 0)
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m2[k] = c[k];
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}
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allCMaps.Add(enc, m2);
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c = m2;
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}
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}
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translationMap = c;
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}
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fontDesc = (Hashtable)allFonts[fontName];
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if (fontDesc == null) {
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fontDesc = ReadFontProperties(fontName);
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allFonts.Add(fontName, fontDesc);
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}
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hMetrics = (IntHashtable)fontDesc["W"];
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vMetrics = (IntHashtable)fontDesc["W2"];
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}
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/** Checks if its a valid CJK font.
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* @param fontName the font name
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* @param enc the encoding
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* @return <CODE>true</CODE> if it is CJK font
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*/
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public static bool IsCJKFont(string fontName, string enc) {
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LoadProperties();
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string encodings = cjkFonts[fontName];
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return (encodings != null && (enc.Equals("Identity-H") || enc.Equals("Identity-V") || encodings.IndexOf("_" + enc + "_") >= 0));
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}
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/**
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* Gets the width of a <CODE>char</CODE> in normalized 1000 units.
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* @param char1 the unicode <CODE>char</CODE> to get the width of
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* @return the width in normalized 1000 units
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*/
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public override int GetWidth(int char1) {
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int c = (int)char1;
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if (!cidDirect)
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c = translationMap[c];
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int v;
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if (vertical)
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v = vMetrics[c];
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else
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v = hMetrics[c];
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if (v > 0)
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return v;
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else
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return 1000;
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}
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public override int GetWidth(string text) {
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int total = 0;
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for (int k = 0; k < text.Length; ++k) {
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int c = text[k];
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if (!cidDirect)
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c = translationMap[c];
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int v;
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if (vertical)
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v = vMetrics[c];
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else
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v = hMetrics[c];
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if (v > 0)
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total += v;
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else
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total += 1000;
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}
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return total;
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}
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internal override int GetRawWidth(int c, string name) {
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return 0;
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}
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public override int GetKerning(int char1, int char2) {
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return 0;
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}
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private PdfDictionary GetFontDescriptor() {
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PdfDictionary dic = new PdfDictionary(PdfName.FONTDESCRIPTOR);
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dic.Put(PdfName.ASCENT, new PdfLiteral((String)fontDesc["Ascent"]));
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dic.Put(PdfName.CAPHEIGHT, new PdfLiteral((String)fontDesc["CapHeight"]));
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dic.Put(PdfName.DESCENT, new PdfLiteral((String)fontDesc["Descent"]));
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dic.Put(PdfName.FLAGS, new PdfLiteral((String)fontDesc["Flags"]));
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dic.Put(PdfName.FONTBBOX, new PdfLiteral((String)fontDesc["FontBBox"]));
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dic.Put(PdfName.FONTNAME, new PdfName(fontName + style));
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dic.Put(PdfName.ITALICANGLE, new PdfLiteral((String)fontDesc["ItalicAngle"]));
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dic.Put(PdfName.STEMV, new PdfLiteral((String)fontDesc["StemV"]));
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PdfDictionary pdic = new PdfDictionary();
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pdic.Put(PdfName.PANOSE, new PdfString((String)fontDesc["Panose"], null));
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dic.Put(PdfName.STYLE, pdic);
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return dic;
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}
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private PdfDictionary GetCIDFont(PdfIndirectReference fontDescriptor, IntHashtable cjkTag) {
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PdfDictionary dic = new PdfDictionary(PdfName.FONT);
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dic.Put(PdfName.SUBTYPE, PdfName.CIDFONTTYPE0);
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dic.Put(PdfName.BASEFONT, new PdfName(fontName + style));
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dic.Put(PdfName.FONTDESCRIPTOR, fontDescriptor);
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int[] keys = cjkTag.ToOrderedKeys();
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string w = ConvertToHCIDMetrics(keys, hMetrics);
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if (w != null)
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dic.Put(PdfName.W, new PdfLiteral(w));
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if (vertical) {
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w = ConvertToVCIDMetrics(keys, vMetrics, hMetrics);
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if (w != null)
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dic.Put(PdfName.W2, new PdfLiteral(w));
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}
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else
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dic.Put(PdfName.DW, new PdfNumber(1000));
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PdfDictionary cdic = new PdfDictionary();
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cdic.Put(PdfName.REGISTRY, new PdfString((string)fontDesc["Registry"], null));
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cdic.Put(PdfName.ORDERING, new PdfString((string)fontDesc["Ordering"], null));
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cdic.Put(PdfName.SUPPLEMENT, new PdfLiteral((string)fontDesc["Supplement"]));
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dic.Put(PdfName.CIDSYSTEMINFO, cdic);
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return dic;
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}
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private PdfDictionary GetFontBaseType(PdfIndirectReference CIDFont) {
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PdfDictionary dic = new PdfDictionary(PdfName.FONT);
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dic.Put(PdfName.SUBTYPE, PdfName.TYPE0);
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string name = fontName;
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if (style.Length > 0)
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name += "-" + style.Substring(1);
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name += "-" + CMap;
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dic.Put(PdfName.BASEFONT, new PdfName(name));
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dic.Put(PdfName.ENCODING, new PdfName(CMap));
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dic.Put(PdfName.DESCENDANTFONTS, new PdfArray(CIDFont));
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return dic;
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}
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internal override void WriteFont(PdfWriter writer, PdfIndirectReference piref, Object[] parms) {
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IntHashtable cjkTag = (IntHashtable)parms[0];
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PdfIndirectReference ind_font = null;
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PdfObject pobj = null;
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PdfIndirectObject obj = null;
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pobj = GetFontDescriptor();
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if (pobj != null){
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obj = writer.AddToBody(pobj);
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ind_font = obj.IndirectReference;
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}
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pobj = GetCIDFont(ind_font, cjkTag);
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if (pobj != null){
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obj = writer.AddToBody(pobj);
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ind_font = obj.IndirectReference;
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}
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pobj = GetFontBaseType(ind_font);
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writer.AddToBody(pobj, piref);
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}
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private float GetDescNumber(string name) {
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return int.Parse((string)fontDesc[name]);
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}
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private float GetBBox(int idx) {
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string s = (string)fontDesc["FontBBox"];
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StringTokenizer tk = new StringTokenizer(s, " []\r\n\t\f");
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string ret = tk.NextToken();
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for (int k = 0; k < idx; ++k)
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ret = tk.NextToken();
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return int.Parse(ret);
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}
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/** Gets the font parameter identified by <CODE>key</CODE>. Valid values
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* for <CODE>key</CODE> are <CODE>ASCENT</CODE>, <CODE>CAPHEIGHT</CODE>, <CODE>DESCENT</CODE>
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* and <CODE>ITALICANGLE</CODE>.
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* @param key the parameter to be extracted
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* @param fontSize the font size in points
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* @return the parameter in points
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*/
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public override float GetFontDescriptor(int key, float fontSize) {
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switch (key) {
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case AWT_ASCENT:
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case ASCENT:
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return GetDescNumber("Ascent") * fontSize / 1000;
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case CAPHEIGHT:
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return GetDescNumber("CapHeight") * fontSize / 1000;
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case AWT_DESCENT:
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case DESCENT:
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return GetDescNumber("Descent") * fontSize / 1000;
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case ITALICANGLE:
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return GetDescNumber("ItalicAngle");
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case BBOXLLX:
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return fontSize * GetBBox(0) / 1000;
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case BBOXLLY:
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return fontSize * GetBBox(1) / 1000;
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case BBOXURX:
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return fontSize * GetBBox(2) / 1000;
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case BBOXURY:
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return fontSize * GetBBox(3) / 1000;
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case AWT_LEADING:
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return 0;
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case AWT_MAXADVANCE:
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return fontSize * (GetBBox(2) - GetBBox(0)) / 1000;
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}
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return 0;
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}
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public override string PostscriptFontName {
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get {
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return fontName;
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}
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set {
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fontName = value;
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}
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}
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/** Gets the full name of the font. If it is a True Type font
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* each array element will have {Platform ID, Platform Encoding ID,
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* Language ID, font name}. The interpretation of this values can be
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* found in the Open Type specification, chapter 2, in the 'name' table.<br>
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* For the other fonts the array has a single element with {"", "", "",
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* font name}.
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* @return the full name of the font
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*/
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public override string[][] FullFontName {
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get {
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return new string[][]{new string[] {"", "", "", fontName}};
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}
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}
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/** Gets all the entries of the names-table. If it is a True Type font
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* each array element will have {Name ID, Platform ID, Platform Encoding ID,
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* Language ID, font name}. The interpretation of this values can be
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* found in the Open Type specification, chapter 2, in the 'name' table.<br>
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* For the other fonts the array has a single element with {"4", "", "", "",
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* font name}.
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* @return the full name of the font
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*/
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public override string[][] AllNameEntries {
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get {
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return new string[][]{new string[]{"4", "", "", "", fontName}};
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}
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}
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/** Gets the family name of the font. If it is a True Type font
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* each array element will have {Platform ID, Platform Encoding ID,
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* Language ID, font name}. The interpretation of this values can be
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* found in the Open Type specification, chapter 2, in the 'name' table.<br>
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* For the other fonts the array has a single element with {"", "", "",
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* font name}.
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* @return the family name of the font
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*/
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public override string[][] FamilyFontName {
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get {
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return this.FullFontName;
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}
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}
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internal static char[] ReadCMap(string name) {
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Stream istr = null;
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try {
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name = name + ".cmap";
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istr = GetResourceStream(RESOURCE_PATH + name);
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char[] c = new char[0x10000];
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for (int k = 0; k < 0x10000; ++k)
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c[k] = (char)((istr.ReadByte() << 8) + istr.ReadByte());
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return c;
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}
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catch {
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// empty on purpose
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}
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finally {
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try{istr.Close();}catch{}
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}
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return null;
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}
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internal static IntHashtable CreateMetric(string s) {
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IntHashtable h = new IntHashtable();
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StringTokenizer tk = new StringTokenizer(s);
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while (tk.HasMoreTokens()) {
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int n1 = int.Parse(tk.NextToken());
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h[n1] = int.Parse(tk.NextToken());
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}
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return h;
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}
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internal static string ConvertToHCIDMetrics(int[] keys, IntHashtable h) {
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if (keys.Length == 0)
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return null;
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int lastCid = 0;
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int lastValue = 0;
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int start;
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for (start = 0; start < keys.Length; ++start) {
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lastCid = keys[start];
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lastValue = h[lastCid];
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if (lastValue != 0) {
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++start;
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break;
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}
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}
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if (lastValue == 0)
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return null;
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StringBuilder buf = new StringBuilder();
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buf.Append('[');
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buf.Append(lastCid);
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int state = FIRST;
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for (int k = start; k < keys.Length; ++k) {
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int cid = keys[k];
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int value = h[cid];
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if (value == 0)
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continue;
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switch (state) {
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case FIRST: {
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if (cid == lastCid + 1 && value == lastValue) {
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state = SERIAL;
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}
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else if (cid == lastCid + 1) {
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state = BRACKET;
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buf.Append('[').Append(lastValue);
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}
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else {
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buf.Append('[').Append(lastValue).Append(']').Append(cid);
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}
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break;
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}
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case BRACKET: {
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if (cid == lastCid + 1 && value == lastValue) {
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state = SERIAL;
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buf.Append(']').Append(lastCid);
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}
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else if (cid == lastCid + 1) {
|
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buf.Append(' ').Append(lastValue);
|
|
}
|
|
else {
|
|
state = FIRST;
|
|
buf.Append(' ').Append(lastValue).Append(']').Append(cid);
|
|
}
|
|
break;
|
|
}
|
|
case SERIAL: {
|
|
if (cid != lastCid + 1 || value != lastValue) {
|
|
buf.Append(' ').Append(lastCid).Append(' ').Append(lastValue).Append(' ').Append(cid);
|
|
state = FIRST;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
lastValue = value;
|
|
lastCid = cid;
|
|
}
|
|
switch (state) {
|
|
case FIRST: {
|
|
buf.Append('[').Append(lastValue).Append("]]");
|
|
break;
|
|
}
|
|
case BRACKET: {
|
|
buf.Append(' ').Append(lastValue).Append("]]");
|
|
break;
|
|
}
|
|
case SERIAL: {
|
|
buf.Append(' ').Append(lastCid).Append(' ').Append(lastValue).Append(']');
|
|
break;
|
|
}
|
|
}
|
|
return buf.ToString();
|
|
}
|
|
|
|
internal static string ConvertToVCIDMetrics(int[] keys, IntHashtable v, IntHashtable h) {
|
|
if (keys.Length == 0)
|
|
return null;
|
|
int lastCid = 0;
|
|
int lastValue = 0;
|
|
int lastHValue = 0;
|
|
int start;
|
|
for (start = 0; start < keys.Length; ++start) {
|
|
lastCid = keys[start];
|
|
lastValue = v[lastCid];
|
|
if (lastValue != 0) {
|
|
++start;
|
|
break;
|
|
}
|
|
else
|
|
lastHValue = h[lastCid];
|
|
}
|
|
if (lastValue == 0)
|
|
return null;
|
|
if (lastHValue == 0)
|
|
lastHValue = 1000;
|
|
StringBuilder buf = new StringBuilder();
|
|
buf.Append('[');
|
|
buf.Append(lastCid);
|
|
int state = FIRST;
|
|
for (int k = start; k < keys.Length; ++k) {
|
|
int cid = keys[k];
|
|
int value = v[cid];
|
|
if (value == 0)
|
|
continue;
|
|
int hValue = h[lastCid];
|
|
if (hValue == 0)
|
|
hValue = 1000;
|
|
switch (state) {
|
|
case FIRST: {
|
|
if (cid == lastCid + 1 && value == lastValue && hValue == lastHValue) {
|
|
state = SERIAL;
|
|
}
|
|
else {
|
|
buf.Append(' ').Append(lastCid).Append(' ').Append(-lastValue).Append(' ').Append(lastHValue / 2).Append(' ').Append(V1Y).Append(' ').Append(cid);
|
|
}
|
|
break;
|
|
}
|
|
case SERIAL: {
|
|
if (cid != lastCid + 1 || value != lastValue || hValue != lastHValue) {
|
|
buf.Append(' ').Append(lastCid).Append(' ').Append(-lastValue).Append(' ').Append(lastHValue / 2).Append(' ').Append(V1Y).Append(' ').Append(cid);
|
|
state = FIRST;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
lastValue = value;
|
|
lastCid = cid;
|
|
lastHValue = hValue;
|
|
}
|
|
buf.Append(' ').Append(lastCid).Append(' ').Append(-lastValue).Append(' ').Append(lastHValue / 2).Append(' ').Append(V1Y).Append(" ]");
|
|
return buf.ToString();
|
|
}
|
|
|
|
internal static Hashtable ReadFontProperties(String name) {
|
|
try {
|
|
name += ".properties";
|
|
Stream isp = GetResourceStream(RESOURCE_PATH + name);
|
|
Properties p = new Properties();
|
|
p.Load(isp);
|
|
isp.Close();
|
|
IntHashtable W = CreateMetric(p["W"]);
|
|
p.Remove("W");
|
|
IntHashtable W2 = CreateMetric(p["W2"]);
|
|
p.Remove("W2");
|
|
Hashtable map = new Hashtable();
|
|
foreach (string key in p.Keys) {
|
|
map[key] = p[key];
|
|
}
|
|
map["W"] = W;
|
|
map["W2"] = W2;
|
|
return map;
|
|
}
|
|
catch {
|
|
// empty on purpose
|
|
}
|
|
return null;
|
|
}
|
|
|
|
public override int GetUnicodeEquivalent(int c) {
|
|
if (cidDirect)
|
|
return translationMap[c];
|
|
return c;
|
|
}
|
|
|
|
public override int GetCidCode(int c) {
|
|
if (cidDirect)
|
|
return c;
|
|
return translationMap[c];
|
|
}
|
|
|
|
public override bool HasKernPairs() {
|
|
return false;
|
|
}
|
|
|
|
public override bool CharExists(int c) {
|
|
return translationMap[c] != 0;
|
|
}
|
|
|
|
public override bool SetCharAdvance(int c, int advance) {
|
|
return false;
|
|
}
|
|
|
|
public override bool SetKerning(int char1, int char2, int kern) {
|
|
return false;
|
|
}
|
|
|
|
public override int[] GetCharBBox(int c) {
|
|
return null;
|
|
}
|
|
|
|
protected override int[] GetRawCharBBox(int c, String name) {
|
|
return null;
|
|
}
|
|
}
|
|
} |