Improved rendering

[phpeclipse.git] / archive / org.plog4u.wiki / src / org / plog4u / wiki / filter / Encoder.java

diff --git a/archive/org.plog4u.wiki/src/org/plog4u/wiki/filter/Encoder.java b/archive/org.plog4u.wiki/src/org/plog4u/wiki/filter/Encoder.java
new file mode 100644 (file)
index 0000000..5f472d4
--- /dev/null
+++ b/archive/org.plog4u.wiki/src/org/plog4u/wiki/filter/Encoder.java
@@ -0,0 +1,109 @@
+/*
+ * This file is part of "SnipSnap Radeox Rendering Engine".
+ *
+ * Copyright (c) 2002 Stephan J. Schmidt, Matthias L. Jugel
+ * All Rights Reserved.
+ *
+ * Please visit http://radeox.org/ for updates and contact.
+ *
+ * --LICENSE NOTICE--
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * --LICENSE NOTICE--
+ */
+
+package org.plog4u.wiki.filter;
+
+import org.radeox.regex.Pattern;
+import org.radeox.regex.Matcher;
+import org.radeox.regex.Substitution;
+import org.radeox.regex.MatchResult;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.StringTokenizer;
+
+/*
+ * Escapes and encodes Strings for web usage
+ *
+ * @author stephan
+ * @version $Id: Encoder.java,v 1.1 2005-02-19 00:19:41 axelcl Exp $
+ */
+
+public class Encoder {
+  private final static String DELIMITER = "&\"'<>";
+  private final static Map ESCAPED_CHARS = new HashMap();
+  // private final static Pattern entityPattern = Pattern.compile("&(#?[0-9a-fA-F]+);");
+
+//  static {
+//    ESCAPED_CHARS.put("&", toEntity('&'));
+//    ESCAPED_CHARS.put("\"", toEntity('"'));
+//    ESCAPED_CHARS.put("'", toEntity('\''));
+//    ESCAPED_CHARS.put(">", toEntity('>'));
+//    ESCAPED_CHARS.put("<", toEntity('<'));
+//  }
+
+  static {
+    ESCAPED_CHARS.put("&", "&amp;");
+    ESCAPED_CHARS.put("\"", "&quot;");
+    ESCAPED_CHARS.put("'", toEntity('\''));
+    ESCAPED_CHARS.put(">", "&gt;");
+    ESCAPED_CHARS.put("<", "&lt;");
+  }
+  /**
+   * Encoder special characters that may occur in a HTML so it can be displayed
+   * safely.
+   * @param str the original string
+   * @return the escaped string
+   */
+  public static String escape(String str) {
+    if (str==null || str.equals("")) {
+      return "";
+    }
+    StringBuffer result = new StringBuffer();
+    StringTokenizer tokenizer = new StringTokenizer(str, DELIMITER, true);
+    while(tokenizer.hasMoreTokens()) {
+      String currentToken = tokenizer.nextToken();
+      if(ESCAPED_CHARS.containsKey(currentToken)) {
+        result.append(ESCAPED_CHARS.get(currentToken));
+      } else {
+        result.append(currentToken);
+      }
+    }
+    return result.toString();
+  }
+
+  public static String unescape(String str) {
+    StringBuffer result = new StringBuffer();
+
+    org.radeox.regex.Compiler compiler = org.radeox.regex.Compiler.create();
+    Pattern entityPattern = compiler.compile("&(#?[0-9a-fA-F]+);");
+
+    Matcher matcher = Matcher.create(str, entityPattern);
+    result.append(matcher.substitute(new Substitution() {
+      public void handleMatch(StringBuffer buffer, MatchResult result) {
+        buffer.append(toChar(result.group(1)));
+      }
+    }));
+    return result.toString();
+  }
+  
+  public static String toEntity(int c) {
+    return "&#" + c + ";";
+  }
+
+  public static char toChar(String number) {
+    return (char) Integer.decode(number.substring(1)).intValue();
+  }
+}