[25584] | 1 | /*
|
---|
| 2 | * 08/16/2008
|
---|
| 3 | *
|
---|
| 4 | * XMLParser.java - Simple XML parser.
|
---|
| 5 | *
|
---|
| 6 | * This library is distributed under a modified BSD license. See the included
|
---|
| 7 | * RSyntaxTextArea.License.txt file for details.
|
---|
| 8 | */
|
---|
| 9 | package org.fife.ui.rsyntaxtextarea.parser;
|
---|
| 10 |
|
---|
| 11 | import javax.swing.text.Document;
|
---|
| 12 | import javax.swing.text.Element;
|
---|
| 13 | import javax.xml.parsers.FactoryConfigurationError;
|
---|
| 14 | import javax.xml.parsers.SAXParser;
|
---|
| 15 | import javax.xml.parsers.SAXParserFactory;
|
---|
| 16 | import org.xml.sax.*;
|
---|
| 17 | import org.xml.sax.helpers.*;
|
---|
| 18 |
|
---|
| 19 | import org.fife.io.DocumentReader;
|
---|
| 20 | import org.fife.ui.rsyntaxtextarea.RSyntaxDocument;
|
---|
| 21 |
|
---|
| 22 |
|
---|
| 23 | /**
|
---|
| 24 | * A parser for XML documents. Adds squiggle underlines for any XML errors
|
---|
| 25 | * found (though most XML parsers don't really have error recovery and so only
|
---|
| 26 | * can find one error at a time).<p>
|
---|
| 27 | *
|
---|
| 28 | * This class isn't actually used by RSyntaxTextArea anywhere, but you can
|
---|
| 29 | * install and use it yourself. Doing so is as simple as:
|
---|
| 30 | *
|
---|
| 31 | * <pre>
|
---|
| 32 | * XmlParser xmlParser = new XmlParser();
|
---|
| 33 | * textArea.addParser(xmlParser);
|
---|
| 34 | * </pre>
|
---|
| 35 | *
|
---|
| 36 | * Also note that a single instance of this class can be installed on
|
---|
| 37 | * multiple instances of <code>RSyntaxTextArea</code>.
|
---|
| 38 | *
|
---|
| 39 | * For a more complete XML parsing solution, see the
|
---|
| 40 | * <a href="http://svn.fifesoft.com/viewvc-1.0.5/bin/cgi/viewvc.cgi/RSTALanguageSupport/trunk/?root=RSyntaxTextArea">RSTALanguageSupport
|
---|
| 41 | * project</a>'s <code>XmlLanguageSupport</code> class.
|
---|
| 42 | *
|
---|
| 43 | * @author Robert Futrell
|
---|
| 44 | * @version 1.1
|
---|
| 45 | */
|
---|
| 46 | public class XmlParser extends AbstractParser {
|
---|
| 47 |
|
---|
| 48 | private SAXParserFactory spf;
|
---|
| 49 | private DefaultParseResult result;
|
---|
| 50 |
|
---|
| 51 |
|
---|
| 52 | public XmlParser() {
|
---|
| 53 | result = new DefaultParseResult(this);
|
---|
| 54 | try {
|
---|
| 55 | spf = SAXParserFactory.newInstance();
|
---|
| 56 | } catch (FactoryConfigurationError fce) {
|
---|
| 57 | fce.printStackTrace();
|
---|
| 58 | }
|
---|
| 59 | }
|
---|
| 60 |
|
---|
| 61 |
|
---|
| 62 | /**
|
---|
| 63 | * {@inheritDoc}
|
---|
| 64 | */
|
---|
| 65 | public ParseResult parse(RSyntaxDocument doc, String style) {
|
---|
| 66 |
|
---|
| 67 | result.clearNotices();
|
---|
| 68 | Element root = doc.getDefaultRootElement();
|
---|
| 69 | result.setParsedLines(0, root.getElementCount()-1);
|
---|
| 70 |
|
---|
| 71 | if (spf==null) {
|
---|
| 72 | return result;
|
---|
| 73 | }
|
---|
| 74 |
|
---|
| 75 | try {
|
---|
| 76 | SAXParser sp = spf.newSAXParser();
|
---|
| 77 | Handler handler = new Handler(doc);
|
---|
| 78 | DocumentReader r = new DocumentReader(doc);
|
---|
| 79 | InputSource input = new InputSource(r);
|
---|
| 80 | sp.parse(input, handler);
|
---|
| 81 | r.close();
|
---|
| 82 | } catch (SAXParseException spe) {
|
---|
| 83 | // A fatal parse error - ignore; a ParserNotice was already created.
|
---|
| 84 | } catch (Exception e) {
|
---|
| 85 | e.printStackTrace();
|
---|
| 86 | result.addNotice(new DefaultParserNotice(this,
|
---|
| 87 | "Error parsing XML: " + e.getMessage(), 0, -1, -1));
|
---|
| 88 | }
|
---|
| 89 |
|
---|
| 90 | return result;
|
---|
| 91 |
|
---|
| 92 | }
|
---|
| 93 |
|
---|
| 94 |
|
---|
| 95 | /**
|
---|
| 96 | * Callback notified when errors are found in the XML document. Adds a
|
---|
| 97 | * notice to be squiggle-underlined.
|
---|
| 98 | */
|
---|
| 99 | private class Handler extends DefaultHandler {
|
---|
| 100 |
|
---|
| 101 | private Document doc;
|
---|
| 102 |
|
---|
| 103 | private Handler(Document doc) {
|
---|
| 104 | this.doc = doc;
|
---|
| 105 | }
|
---|
| 106 |
|
---|
| 107 | private void doError(SAXParseException e, int level) {
|
---|
| 108 | int line = e.getLineNumber() - 1;
|
---|
| 109 | Element root = doc.getDefaultRootElement();
|
---|
| 110 | Element elem = root.getElement(line);
|
---|
| 111 | int offs = elem.getStartOffset();
|
---|
| 112 | int len = elem.getEndOffset() - offs;
|
---|
| 113 | if (line==root.getElementCount()-1) {
|
---|
| 114 | len++;
|
---|
| 115 | }
|
---|
| 116 | DefaultParserNotice pn = new DefaultParserNotice(XmlParser.this,
|
---|
| 117 | e.getMessage(), line, offs, len);
|
---|
| 118 | pn.setLevel(level);
|
---|
| 119 | result.addNotice(pn);
|
---|
| 120 | }
|
---|
| 121 |
|
---|
| 122 | public void error(SAXParseException e) {
|
---|
| 123 | doError(e, ParserNotice.ERROR);
|
---|
| 124 | }
|
---|
| 125 |
|
---|
| 126 | public void fatalError(SAXParseException e) {
|
---|
| 127 | doError(e, ParserNotice.ERROR);
|
---|
| 128 | }
|
---|
| 129 |
|
---|
| 130 | public void warning(SAXParseException e) {
|
---|
| 131 | doError(e, ParserNotice.WARNING);
|
---|
| 132 | }
|
---|
| 133 |
|
---|
| 134 | }
|
---|
| 135 |
|
---|
| 136 |
|
---|
| 137 | } |
---|