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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 | } | ||