001    /*
002     * Copyright (c) 2007 Mozilla Foundation
003     *
004     * Permission is hereby granted, free of charge, to any person obtaining a 
005     * copy of this software and associated documentation files (the "Software"), 
006     * to deal in the Software without restriction, including without limitation 
007     * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
008     * and/or sell copies of the Software, and to permit persons to whom the 
009     * Software is furnished to do so, subject to the following conditions:
010     *
011     * The above copyright notice and this permission notice shall be included in 
012     * all copies or substantial portions of the Software.
013     *
014     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
015     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
016     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
017     * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
018     * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
019     * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
020     * DEALINGS IN THE SOFTWARE.
021     */
022    
023    package nu.validator.messages;
024    
025    import java.util.SortedSet;
026    
027    import org.xml.sax.SAXException;
028    
029    import nu.validator.source.SourceHandler;
030    import nu.validator.xml.AttributesImpl;
031    import nu.validator.xml.XhtmlSaxEmitter;
032    
033    public class XhtmlExtractHandler implements SourceHandler {
034    
035        private static final char[] NEWLINE_SUBSTITUTE = { '\u21A9' };
036    
037        private static final char[] ELLIPSIS = { '\u2026' };
038    
039        private final XhtmlSaxEmitter emitter;
040    
041        private static final AttributesImpl LINE_BREAK_ATTRS = new AttributesImpl();
042    
043        static {
044            LINE_BREAK_ATTRS.addAttribute("class", "lf");
045            LINE_BREAK_ATTRS.addAttribute("title", "Line break");
046        }
047    
048        /**
049         * @param emitter
050         */
051        public XhtmlExtractHandler(final XhtmlSaxEmitter emitter) {
052            this.emitter = emitter;
053        }
054    
055        public void characters(char[] ch, int start, int length)
056                throws SAXException {
057            if (length < 200) {
058                emitter.characters(ch, start, length);
059            } else {
060                emitter.characters(ch, start, 100);
061                emitter.startElementWithClass("span", "snip");
062                emitter.characters(ELLIPSIS);
063                emitter.endElement("span");
064                emitter.characters(ch, start + length - 100, 100);
065            }
066        }
067    
068        public void endSource() throws SAXException {
069        }
070    
071        public void endCharHilite() throws SAXException {
072            emitter.endElement("b");
073        }
074    
075        public void endRange() throws SAXException {
076            emitter.endElement("b");
077        }
078    
079        public void newLine() throws SAXException {
080            emitter.startElement("span", LINE_BREAK_ATTRS);
081            emitter.characters(NEWLINE_SUBSTITUTE);
082            emitter.endElement("span");
083        }
084    
085        public void startSource(String type, String encoding) throws SAXException {
086        }
087    
088        public void startCharHilite(int oneBasedLine, int oneBasedColumn)
089                throws SAXException {
090            emitter.startElement("b");
091        }
092    
093        public void startRange(int oneBasedLine, int oneBasedColumn)
094                throws SAXException {
095            emitter.startElement("b");
096        }
097    
098        public void setLineErrors(SortedSet<Integer> oneBasedLineErrors) throws SAXException {
099            
100        }
101    
102    }