| /* |
| * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| 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. |
| * |
| */ |
| 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<AttributedString> 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 = 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] = attributedStrings. |
| get(counter).getIterator(); |
| } |
| return new AttributedString(iterators).getIterator(); |
| } |
| } |