- /*
- * @(#)CharacterIteratorFieldDelegate.java 1.3 03/01/23
- *
- * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
- * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
- */
- package java.text;
-
- import java.util.ArrayList;
-
- /**
- * CharacterIteratorFieldDelegate combines the notifications from a Format
- * into a resulting <code>AttributedCharacterIterator</code>. The resulting
- * <code>AttributedCharacterIterator</code> can be retrieved by way of
- * the <code>getIterator</code> method.
- *
- * @version 1.3 01/23/03
- */
- class CharacterIteratorFieldDelegate implements Format.FieldDelegate {
- /**
- * Array of AttributeStrings. Whenever <code>formatted</code> is invoked
- * for a region > size, a new instance of AttributedString is added to
- * attributedStrings. Subsequent invocations of <code>formatted</code>
- * for existing regions result in invoking addAttribute on the existing
- * AttributedStrings.
- */
- private ArrayList attributedStrings;
- /**
- * Running count of the number of characters that have
- * been encountered.
- */
- private int size;
-
-
- CharacterIteratorFieldDelegate() {
- attributedStrings = new ArrayList();
- }
-
- public void formatted(Format.Field attr, Object value, int start, int end,
- StringBuffer buffer) {
- if (start != end) {
- if (start < size) {
- // Adjust attributes of existing runs
- int index = size;
- int asIndex = attributedStrings.size() - 1;
-
- while (start < index) {
- AttributedString as = (AttributedString)attributedStrings.
- get(asIndex--);
- int newIndex = index - as.length();
- int aStart = Math.max(0, start - newIndex);
-
- as.addAttribute(attr, value, aStart, Math.min(
- end - start, as.length() - aStart) +
- aStart);
- index = newIndex;
- }
- }
- if (size < start) {
- // Pad attributes
- attributedStrings.add(new AttributedString(
- buffer.substring(size, start)));
- size = start;
- }
- if (size < end) {
- // Add new string
- int aStart = Math.max(start, size);
- AttributedString string = new AttributedString(
- buffer.substring(aStart, end));
-
- string.addAttribute(attr, value);
- attributedStrings.add(string);
- size = end;
- }
- }
- }
-
- public void formatted(int fieldID, Format.Field attr, Object value,
- int start, int end, StringBuffer buffer) {
- formatted(attr, value, start, end, buffer);
- }
-
- /**
- * Returns an <code>AttributedCharacterIterator</code> that can be used
- * to iterate over the resulting formatted String.
- *
- * @pararm string Result of formatting.
- */
- public AttributedCharacterIterator getIterator(String string) {
- // Add the last AttributedCharacterIterator if necessary
- // assert(size <= string.length());
- if (string.length() > size) {
- attributedStrings.add(new AttributedString(
- string.substring(size)));
- size = string.length();
- }
- int iCount = attributedStrings.size();
- AttributedCharacterIterator iterators[] = new
- AttributedCharacterIterator[iCount];
-
- for (int counter = 0; counter < iCount; counter++) {
- iterators[counter] = ((AttributedString)attributedStrings.
- get(counter)).getIterator();
- }
- return new AttributedString(iterators).getIterator();
- }
- }