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package org.apache.tapestry.util.text; |
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public class MarkupCharacterTranslator implements ICharacterTranslator { |
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private static final String SAFE_CHARACTERS = "01234567890" |
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+ "abcdefghijklmnopqrstuvwxyz" + "ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
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+ "\t\n\r !#$%'()*+,-./:;=?@[\\]^_`{|}~"; |
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private static final String[][] ENTITIES = { |
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{"\"", """}, |
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{"<", "<"}, {">", ">"}, {"&", "&"} |
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}; |
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private static final ICharacterMatcher SAFE_MATCHER = new AsciiCharacterMatcher(SAFE_CHARACTERS); |
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private static final ICharacterTranslator ENTITY_TRANSLATOR = new AsciiCharacterTranslator(ENTITIES); |
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private boolean _encodeNonAscii; |
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private ICharacterMatcher _safeMatcher; |
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private ICharacterTranslator _entityTranslator; |
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public MarkupCharacterTranslator() |
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{ |
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this(true); |
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} |
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public MarkupCharacterTranslator(boolean encodeNonAscii) |
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{ |
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this(encodeNonAscii, SAFE_MATCHER, ENTITY_TRANSLATOR); |
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} |
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public MarkupCharacterTranslator(boolean encodeNonAscii, |
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ICharacterMatcher safeMatcher, ICharacterTranslator entityTranslator) |
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{ |
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_encodeNonAscii = encodeNonAscii; |
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_safeMatcher = safeMatcher; |
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_entityTranslator = entityTranslator; |
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} |
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public MarkupCharacterTranslator(boolean encodeNonAscii, |
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String safeCharacters, String[][] entities) |
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{ |
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_encodeNonAscii = encodeNonAscii; |
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_safeMatcher = new AsciiCharacterMatcher(safeCharacters); |
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_entityTranslator = new AsciiCharacterTranslator(entities); |
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} |
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public String translate(char ch) |
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{ |
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if (ch >= 160 && !_encodeNonAscii) |
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return null; |
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if (_safeMatcher.matches(ch)) |
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return null; |
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String entity = _entityTranslator.translate(ch); |
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if (entity != null) |
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return entity; |
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return "&#" + (int) ch + ";"; |
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} |
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} |