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→6. Add Highlights to Search
=== 6. Add Highlights to Search ===
6.1Create a new helper class and put it in <code>util</code> package:<br/> <pre> package cs.ecl.rcp.simplercp.util; import java.util.ArrayList; import java.util.List; public class SearchUtil { public static int[] getSearchTermOccurrences(final String searchTerm, final String content) { if (searchTerm == null || searchTerm.length() == 0) { return new int[0]; } if (content == null) { throw new IllegalArgumentException("content is null"); } final List<Integer> list = new ArrayList<Integer>(); int searchTermLength = searchTerm.length(); int index; int fromIndex = 0; int lastIndex = -1; int lastLength = 0; while (true) { index = content.toLowerCase().indexOf(searchTerm.toLowerCase(), fromIndex); if (index == -1) { // no occurrence of "searchTerm" in "content" starting from // index "fromIndex" if (lastIndex != -1) { // but there was a previous occurrence list.add(Integer.valueOf(lastIndex)); list.add(Integer.valueOf(lastLength)); } break; } if (lastIndex == -1) { // the first occurrence of "searchTerm" in "content" lastIndex = index; lastLength = searchTermLength; } else { if (lastIndex + lastLength == index) { // the current occurrence is right after the previous // occurrence lastLength += searchTermLength; } else { // there is at least one character between the current // occurrence and the previous one list.add(Integer.valueOf(lastIndex)); list.add(Integer.valueOf(lastLength)); lastIndex = index; lastLength = searchTermLength; } } fromIndex = index + searchTermLength; } final int n = list.size(); final int[] result = new int[n]; for (int i = 0; i != n; i++) { result[i] = list.get(i); } return result; } } </pre><br/>5.2
