Java tutorial
/********************************************************************************** * $URL$ * $Id$ *********************************************************************************** * * Copyright (c) 2005, 2006, 2007, 2008, 2009 The Sakai Foundation * * Licensed under the Educational Community License, Version 2.0 (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.opensource.org/licenses/ECL-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * **********************************************************************************/ package org.sakaiproject.tool.assessment.util; import java.io.UnsupportedEncodingException; import java.net.URLEncoder; import java.util.ArrayList; import java.util.Iterator; import java.util.Vector; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; /** * <p>Copyright: Copyright (c) 2003-5</p> * <p>Organization: Sakai Project</p> * @author jlannan * @author Ed Smiley esmiley@stanford.edu * @version $Id$ */ public class TextFormat { private Log log = LogFactory.getLog(TextFormat.class); private static final String HTML; private static final String SMART; private static final String PLAIN; private static final Vector vProtocols; //private String upperText; private StringBuilder returnText; private StringBuilder resource; private ArrayList arrLst; static { HTML = "HTML"; SMART = "SMART"; PLAIN = "PLAIN"; vProtocols = new Vector(); vProtocols.add("http://"); vProtocols.add("https://"); vProtocols.add("ftp://"); vProtocols.add("www."); vProtocols.add("telent:"); vProtocols.add("mailto:"); } /** * DOCUMENTATION PENDING * * @param text TEXT TO BE MODIFIED * @param texttype TYPE OF TEXT -- PLAIN, HTML, OR SMART * @param iconPath PATH TO ICON IMAGES IN APPLICATION * * @return DOCUMENTATION PENDING */ public String formatText(String text, String texttype, String iconPath) { if (log.isDebugEnabled()) { log.debug("formatText(String " + text + ", String " + texttype + ", String " + iconPath + ")"); } returnText = new StringBuilder(); if ((texttype == null) || (text == null)) { return text; } else if (texttype.equals(TextFormat.PLAIN)) { return text; } else if (texttype.equals(TextFormat.HTML)) { return text; } else if (texttype.equals(TextFormat.SMART)) { int start = 0; int end = 0; while (true) { arrLst = new ArrayList(); // traverse vector of protocol strings Iterator i = vProtocols.iterator(); Integer retVal; while (i.hasNext()) { String str = (String) i.next(); arrLst.add(retVal = indexOfIgnoreCase(text, str)); if (retVal.intValue() == -1) { i.remove(); } } start = minimum(arrLst); log.debug("start: " + String.valueOf(start)); if ((start == -1) || vProtocols.isEmpty()) { break; } // find either the next space or the end of string whichever comes first if ((end = text.indexOf(" ", start)) == -1) { end = text.length(); } // extract text and resource text from StringBuilder if (start != 0) { returnText.append(text.substring(0, start)); log.debug("adding pre-resource text: " + text.substring(0, start)); } log.debug("end: " + String.valueOf(end)); resource = new StringBuilder(); String upper = text.substring(start, end).toUpperCase(); try { if (upper.startsWith("HTTPS://")) { resource.append("https://"); resource.append(URLEncoder.encode(text.substring(start + 8, end), "UTF-8")); log.debug("hi" + resource); } else if (upper.startsWith("HTTP://") || upper.startsWith("MAILTO:") || upper.startsWith("TELNET:")) { resource.append("http://"); resource.append(URLEncoder.encode(text.substring(start + 7, end), "UTF-8")); } else if (upper.startsWith("FTP://")) { resource.append("ftp://"); resource.append(URLEncoder.encode(text.substring(start + 6, end), "UTF-8")); } else if (upper.startsWith("WWW.")) { resource.append("www."); resource.append(URLEncoder.encode(text.substring(start + 4, end), "UTF-8")); } else { ; } } catch (UnsupportedEncodingException e) { log.error(e.getMessage(), e); } String temp = resource.toString(); resource.insert(resource.length(), "', target=_new>" + temp + "</a>"); resource.insert(0, "<a href='"); //stringParts.add(resource.toString()); returnText.append(resource); log.debug("add ing resource: " + resource.toString()); // delete resource string text = text.substring(end); } // add remaining characters to buffer if (text.length() != 0) { returnText.append(text); } int temp = 0; // replace emoticons with images while ((temp = returnText.indexOf(":-)")) != -1) { returnText.replace(temp, temp + 3, "<img src='" + iconPath + "smile.gif'/>"); } while ((temp = returnText.indexOf(":-(")) != -1) { returnText.replace(temp, temp + 3, "<img src='" + iconPath + "frown.gif'/>"); } while ((temp = returnText.indexOf(":-o")) != -1) { returnText.replace(temp, temp + 3, "<img src='" + iconPath + "suprise.gif'/>"); } while ((temp = returnText.indexOf(";-)")) != -1) { returnText.replace(temp, temp + 3, "<img src='" + iconPath + "wink.gif'/>"); } while ((temp = returnText.indexOf(":)")) != -1) { returnText.replace(temp, temp + 2, "<img src='" + iconPath + "smile.gif'/>"); } while ((temp = returnText.indexOf(":(")) != -1) { returnText.replace(temp, temp + 2, "<img src='" + iconPath + "frown.gif'/>"); } while ((temp = returnText.indexOf(":o")) != -1) { returnText.replace(temp, temp + 2, "<img src='" + iconPath + "suprise.gif'/>"); } while ((temp = returnText.indexOf(";)")) != -1) { returnText.replace(temp, temp + 2, "<img src='" + iconPath + "wink.gif'/>"); } return returnText.toString(); } else { return ""; } } /** * DOCUMENTATION PENDING * * @param str STRING TO BE SEARCHED * @param searchString STRING TO SEARCH FOR WITHIN str * * @return INDEX LOCATION OF searchString within str */ public Integer indexOfIgnoreCase(String str, String searchString) { if (log.isDebugEnabled()) { log.debug("indexOfIgnoreCase(String " + str + ", String " + searchString + ")"); } return Integer.valueOf(str.toUpperCase().indexOf(searchString.toUpperCase())); } /** * DOCUMENTATION PENDING * * @param a LIST OF INDICIES OF OCCURANCES OF HYPERLINKS WITHIN TEXT * * @return MINIMUM OF ALL OCCURANCES OR -1 IF NO OCCURANCES */ public int minimum(ArrayList a) { if (log.isDebugEnabled()) { log.debug("minimum(ArrayList " + a + ")"); } boolean firstNumber = true; int tmp = 0; int min = -1; Iterator i = a.iterator(); while (i.hasNext()) { tmp = ((Integer) i.next()).intValue(); if (firstNumber && (tmp != -1)) { firstNumber = false; min = tmp; } if ((tmp != -1) && (tmp < min)) { min = tmp; } } return min; } public static String convertPlaintextToFormattedTextNoHighUnicode(Log log, String value) { if (value == null) return ""; try { StringBuilder buf = new StringBuilder(); final int len = value.length(); for (int i = 0; i < len; i++) { char c = value.charAt(i); switch (c) { case '<': { if (buf == null) buf = new StringBuilder(value.substring(0, i)); buf.append("<"); } break; case '>': { if (buf == null) buf = new StringBuilder(value.substring(0, i)); buf.append(">"); } break; case '&': { if (buf == null) buf = new StringBuilder(value.substring(0, i)); buf.append("&"); } break; case '"': { if (buf == null) buf = new StringBuilder(value.substring(0, i)); buf.append("""); } break; case '\n': { if (buf == null) buf = new StringBuilder(value.substring(0, i)); buf.append("<br />\n"); } break; default: { if (buf != null) buf.append(c); } break; } } // for return (buf == null) ? value : buf.toString(); } catch (Exception e) { log.warn("convertPlaintextToFormattedTextNoHighUnicode: ", e); return ""; } } // convertPlaintextToFormattedTextNoHighUnicode }