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/*
* Copyright (c) 2000, 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 AttributedCharacterIterator. The resulting
* AttributedCharacterIterator can be retrieved by way of
* the getIterator method.
*
*/
class CharacterIteratorFieldDelegate implements Format.FieldDelegate {
/**
* Array of AttributeStrings. Whenever formatted is invoked
* for a region > size, a new instance of AttributedString is added to
* attributedStrings. Subsequent invocations of formatted
* 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 AttributedCharacterIterator 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();
}
}
