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| 1 | +/* | |
| 2 | + * Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | +package java.text; | |
| 26 | + | |
| 27 | +import java.util.ArrayList; | |
| 28 | + | |
| 29 | +/** | |
| 30 | + * CharacterIteratorFieldDelegate combines the notifications from a Format | |
| 31 | + * into a resulting <code>AttributedCharacterIterator</code>. The resulting | |
| 32 | + * <code>AttributedCharacterIterator</code> can be retrieved by way of | |
| 33 | + * the <code>getIterator</code> method. | |
| 34 | + * | |
| 35 | + */ | |
| 36 | +class CharacterIteratorFieldDelegate implements Format.FieldDelegate { | |
| 37 | + /** | |
| 38 | + * Array of AttributeStrings. Whenever <code>formatted</code> is invoked | |
| 39 | + * for a region > size, a new instance of AttributedString is added to | |
| 40 | + * attributedStrings. Subsequent invocations of <code>formatted</code> | |
| 41 | + * for existing regions result in invoking addAttribute on the existing | |
| 42 | + * AttributedStrings. | |
| 43 | + */ | |
| 44 | + private ArrayList attributedStrings; | |
| 45 | + /** | |
| 46 | + * Running count of the number of characters that have | |
| 47 | + * been encountered. | |
| 48 | + */ | |
| 49 | + private int size; | |
| 50 | + | |
| 51 | + | |
| 52 | + CharacterIteratorFieldDelegate() { | |
| 53 | + attributedStrings = new ArrayList(); | |
| 54 | + } | |
| 55 | + | |
| 56 | + public void formatted(Format.Field attr, Object value, int start, int end, | |
| 57 | + StringBuffer buffer) { | |
| 58 | + if (start != end) { | |
| 59 | + if (start < size) { | |
| 60 | + // Adjust attributes of existing runs | |
| 61 | + int index = size; | |
| 62 | + int asIndex = attributedStrings.size() - 1; | |
| 63 | + | |
| 64 | + while (start < index) { | |
| 65 | + AttributedString as = (AttributedString)attributedStrings. | |
| 66 | + get(asIndex--); | |
| 67 | + int newIndex = index - as.length(); | |
| 68 | + int aStart = Math.max(0, start - newIndex); | |
| 69 | + | |
| 70 | + as.addAttribute(attr, value, aStart, Math.min( | |
| 71 | + end - start, as.length() - aStart) + | |
| 72 | + aStart); | |
| 73 | + index = newIndex; | |
| 74 | + } | |
| 75 | + } | |
| 76 | + if (size < start) { | |
| 77 | + // Pad attributes | |
| 78 | + attributedStrings.add(new AttributedString( | |
| 79 | + buffer.substring(size, start))); | |
| 80 | + size = start; | |
| 81 | + } | |
| 82 | + if (size < end) { | |
| 83 | + // Add new string | |
| 84 | + int aStart = Math.max(start, size); | |
| 85 | + AttributedString string = new AttributedString( | |
| 86 | + buffer.substring(aStart, end)); | |
| 87 | + | |
| 88 | + string.addAttribute(attr, value); | |
| 89 | + attributedStrings.add(string); | |
| 90 | + size = end; | |
| 91 | + } | |
| 92 | + } | |
| 93 | + } | |
| 94 | + | |
| 95 | + public void formatted(int fieldID, Format.Field attr, Object value, | |
| 96 | + int start, int end, StringBuffer buffer) { | |
| 97 | + formatted(attr, value, start, end, buffer); | |
| 98 | + } | |
| 99 | + | |
| 100 | + /** | |
| 101 | + * Returns an <code>AttributedCharacterIterator</code> that can be used | |
| 102 | + * to iterate over the resulting formatted String. | |
| 103 | + * | |
| 104 | + * @pararm string Result of formatting. | |
| 105 | + */ | |
| 106 | + public AttributedCharacterIterator getIterator(String string) { | |
| 107 | + // Add the last AttributedCharacterIterator if necessary | |
| 108 | + // assert(size <= string.length()); | |
| 109 | + if (string.length() > size) { | |
| 110 | + attributedStrings.add(new AttributedString( | |
| 111 | + string.substring(size))); | |
| 112 | + size = string.length(); | |
| 113 | + } | |
| 114 | + int iCount = attributedStrings.size(); | |
| 115 | + AttributedCharacterIterator iterators[] = new | |
| 116 | + AttributedCharacterIterator[iCount]; | |
| 117 | + | |
| 118 | + for (int counter = 0; counter < iCount; counter++) { | |
| 119 | + iterators[counter] = ((AttributedString)attributedStrings. | |
| 120 | + get(counter)).getIterator(); | |
| 121 | + } | |
| 122 | + return new AttributedString(iterators).getIterator(); | |
| 123 | + } | |
| 124 | +} | |