added LinkTextParser

scm-core/src/main/java/sonia/scm/util/LinkTextParser.java

@@ -0,0 +1,186 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of SCM-Manager; nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.util;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.text.MessageFormat;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public class LinkTextParser
+{
+
+  /** Field description */
+  private static final Pattern REGEX_URL =
+    Pattern.compile(
+        "\\(?\\b((?:https?://|ftps?://|mailto:|www[.])[-A-Za-z0-9+&@#/%?=~_()|!:,.;]*[-A-Za-z0-9+&@#/%=~_()|])");
+
+  /** Field description */
+  private static final String REPLACE_URL =
+    "<a target=\"_blank\" href=\"{1}\">{0}</a>";
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param content
+   *
+   * @return
+   */
+  public String parseText(String content)
+  {
+    Matcher m = REGEX_URL.matcher(content);
+    List<Token> tokens = new ArrayList<Token>();
+    int position = 0;
+    String tokenContent = null;
+
+    while (m.find())
+    {
+      int start = m.start();
+      int end = m.end();
+      String replacement = m.group();
+
+      if (replacement.startsWith("www"))
+      {
+        replacement = "http://" + replacement;
+      }
+
+      tokenContent = content.substring(position, start);
+      tokens.add(new Token(tokenContent));
+      tokenContent = content.substring(start, end);
+      tokens.add(new Token(tokenContent, replacement));
+      position = end;
+    }
+
+    tokenContent = content.substring(position, content.length());
+    tokens.add(new Token(tokenContent));
+
+    StringBuilder buffer = new StringBuilder();
+
+    for (Token token : tokens)
+    {
+      if (token.getReplacement() != null)
+      {
+        buffer.append(MessageFormat.format(REPLACE_URL, token.getValue(),
+                                           token.getReplacement()));
+      }
+      else
+      {
+        buffer.append(token.getValue().replace("<", "&lt;").replace(">",
+                "&gt;"));
+      }
+    }
+
+    return buffer.toString();
+  }
+
+  //~--- inner classes --------------------------------------------------------
+
+  /**
+   * Class description
+   *
+   *
+   * @version        Enter version here..., 11/11/06
+   * @author         Enter your name here...    
+   */
+  private static class Token
+  {
+
+    /**
+     * Constructs ...
+     *
+     *
+     * @param value
+     */
+    public Token(String value)
+    {
+      this.value = value;
+    }
+
+    /**
+     * Constructs ...
+     *
+     *
+     * @param value
+     * @param replacement
+     */
+    public Token(String value, String replacement)
+    {
+      this.value = value;
+      this.replacement = replacement;
+    }
+
+    //~--- get methods --------------------------------------------------------
+
+    /**
+     * Method description
+     *
+     *
+     * @return
+     */
+    public String getReplacement()
+    {
+      return replacement;
+    }
+
+    /**
+     * Method description
+     *
+     *
+     * @return
+     */
+    public String getValue()
+    {
+      return value;
+    }
+
+    //~--- fields -------------------------------------------------------------
+
+    /** Field description */
+    private String replacement;
+
+    /** Field description */
+    private String value;
+  }
+}