Initial Commit

iTechSharp/iTextSharp/text/pdf/HyphenationAuto.cs

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+using System;
+
+using iTextSharp.text.pdf.hyphenation;
+
+/*
+ * Copyright 2002 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/
+ */
+
+namespace iTextSharp.text.pdf {
+
+    /** Hyphenates words automatically accordingly to the language and country.
+     * The hyphenator engine was taken from FOP and uses the TEX patterns. If a language
+     * is not provided and a TEX pattern for it exists, it can be easily adapted.
+     *
+     * @author Paulo Soares (psoares@consiste.pt)
+     */
+    public class HyphenationAuto : IHyphenationEvent {
+
+        /** The hyphenator engine.
+                                      */    
+        protected Hyphenator hyphenator;
+        /** The second part of the hyphenated word.
+                                      */    
+        protected string post;
+    
+        /** Creates a new hyphenation instance usable in <CODE>Chunk</CODE>.
+        * @param lang the language ("en" for english, for example)
+        * @param country the country ("GB" for Great-Britain or "none" for no country, for example)
+        * @param leftMin the minimun number of letters before the hyphen
+        * @param rightMin the minimun number of letters after the hyphen
+        */    
+        public HyphenationAuto(string lang, string country, int leftMin, int rightMin) {
+            hyphenator = new Hyphenator(lang, country, leftMin, rightMin);
+        }
+
+        /** Gets the hyphen symbol.
+         * @return the hyphen symbol
+         */    
+        public string HyphenSymbol {
+            get {
+                return "-";
+            }
+        }
+    
+        /** Hyphenates a word and returns the first part of it. To get
+         * the second part of the hyphenated word call <CODE>getHyphenatedWordPost()</CODE>.
+         * @param word the word to hyphenate
+         * @param font the font used by this word
+         * @param fontSize the font size used by this word
+         * @param remainingWidth the width available to fit this word in
+         * @return the first part of the hyphenated word including
+         * the hyphen symbol, if any
+         */    
+        public string GetHyphenatedWordPre(string word, BaseFont font, float fontSize, float remainingWidth) {
+            post = word;
+            string hyphen = this.HyphenSymbol;
+            float hyphenWidth = font.GetWidthPoint(hyphen, fontSize);
+            if (hyphenWidth > remainingWidth)
+                return "";
+            Hyphenation hyphenation = hyphenator.Hyphenate(word);
+            if (hyphenation == null) {
+                return "";
+            }
+            int len = hyphenation.Length;
+            int k;
+            for (k = 0; k < len; ++k) {
+                if (font.GetWidthPoint(hyphenation.GetPreHyphenText(k), fontSize) + hyphenWidth > remainingWidth)
+                    break;
+            }
+            --k;
+            if (k < 0)
+                return "";
+            post = hyphenation.GetPostHyphenText(k);
+            return hyphenation.GetPreHyphenText(k) + hyphen;
+        }
+    
+        /** Gets the second part of the hyphenated word. Must be called
+         * after <CODE>getHyphenatedWordPre()</CODE>.
+         * @return the second part of the hyphenated word
+         */    
+        public string HyphenatedWordPost {
+            get {
+                return post;
+            }
+        }
+    }
+}