| /* |
| |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| |
| */ |
| package org.apache.batik.gvt.font; |
| |
| |
| /** |
| * A class that represents a CSS unicode range. This only handles |
| * a single range of contigous chars, to handle multiple ranges |
| * (comma seperated) use a list of these. |
| * |
| * @author <a href="mailto:bella.robinson@cmis.csiro.au">Bella Robinson</a> |
| * @version $Id$ |
| */ |
| public class UnicodeRange { |
| |
| private int firstUnicodeValue; |
| private int lastUnicodeValue; |
| |
| /** |
| * Constructs a unicode range from a CSS unicode range string. |
| */ |
| public UnicodeRange(String unicodeRange) { |
| |
| if (unicodeRange.startsWith("U+") && unicodeRange.length() > 2) { |
| // strip off the U+ |
| unicodeRange = unicodeRange.substring(2); |
| int dashIndex = unicodeRange.indexOf('-'); |
| String firstValue; |
| String lastValue; |
| |
| if (dashIndex != -1) { // it is a simple 2 value range |
| firstValue = unicodeRange.substring(0, dashIndex); |
| lastValue = unicodeRange.substring(dashIndex+1); |
| |
| } else { |
| firstValue = unicodeRange; |
| lastValue = unicodeRange; |
| if (unicodeRange.indexOf('?') != -1) { |
| firstValue = firstValue.replace('?', '0'); |
| lastValue = lastValue.replace('?', 'F'); |
| } |
| } |
| try { |
| firstUnicodeValue = Integer.parseInt(firstValue, 16); |
| lastUnicodeValue = Integer.parseInt(lastValue, 16); |
| } catch (NumberFormatException e) { |
| firstUnicodeValue = -1; |
| lastUnicodeValue = -1; |
| } |
| } else { |
| // not a valid unicode range |
| firstUnicodeValue = -1; |
| lastUnicodeValue = -1; |
| } |
| } |
| |
| /** |
| * Returns true if the specified unicode value is within this range. |
| */ |
| public boolean contains(String unicode) { |
| if (unicode.length() == 1) { |
| int unicodeVal = unicode.charAt(0); |
| return contains(unicodeVal); |
| } |
| return false; |
| } |
| |
| public boolean contains(int unicodeVal) { |
| return ((unicodeVal >= firstUnicodeValue) && |
| (unicodeVal <= lastUnicodeValue)); |
| } |
| |
| } |