| /* |
| * Copyright 2000-2014 JetBrains s.r.o. |
| * |
| * Licensed 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 com.intellij.util.xml.converters.values; |
| |
| import com.intellij.util.xml.ConvertContext; |
| import com.intellij.util.xml.Converter; |
| import com.intellij.util.xml.DomBundle; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.Nullable; |
| |
| public class CharacterValueConverter extends Converter<String> { |
| @NonNls private static final String UNICODE_PREFIX = "\\u"; |
| private static final int UNICODE_LENGTH = 6; |
| private final boolean myAllowEmpty; |
| |
| public CharacterValueConverter(final boolean allowEmpty) { |
| myAllowEmpty = allowEmpty; |
| } |
| |
| |
| @Override |
| public String fromString(@Nullable @NonNls String s, final ConvertContext context) { |
| if (s == null) return null; |
| |
| if (myAllowEmpty && s.trim().length() == 0) return s; |
| |
| if (s.trim().length() == 1) return s; |
| |
| if (isUnicodeCharacterSequence(s)) { |
| try { |
| Integer.parseInt(s.substring(UNICODE_PREFIX.length()), 16); |
| return s; |
| } catch (NumberFormatException e) {} |
| |
| } |
| return null; |
| } |
| |
| private static boolean isUnicodeCharacterSequence(String sequence) { |
| return sequence.startsWith(UNICODE_PREFIX) && sequence.length() == UNICODE_LENGTH; |
| } |
| |
| @Override |
| public String toString(@Nullable String s, final ConvertContext context) { |
| return s; |
| } |
| |
| @Override |
| public String getErrorMessage(@Nullable final String s, final ConvertContext context) { |
| return DomBundle.message("value.converter.format.exception", s, "char"); |
| } |
| } |