plugins/net.mograsim.plugin.core/src/net/mograsim/plugin/asm/editor/AsmDocumentValidator.java

   1 package net.mograsim.plugin.asm.editor;
   2
   3 import java.io.StringReader;
   4
   5 import javax.xml.parsers.DocumentBuilder;
   6 import javax.xml.parsers.DocumentBuilderFactory;
   7
   8 import org.eclipse.core.resources.IFile;
   9 import org.eclipse.core.resources.IMarker;
  10 import org.eclipse.core.runtime.CoreException;
  11 import org.eclipse.jface.text.DocumentEvent;
  12 import org.eclipse.jface.text.IDocumentListener;
  13 import org.xml.sax.InputSource;
  14 import org.xml.sax.SAXParseException;
  15
  16 public class AsmDocumentValidator implements IDocumentListener
  17 {
  18
  19         private final IFile file;
  20         private IMarker marker;
  21
  22         AsmDocumentValidator(IFile file)
  23         {
  24                 this.file = file;
  25         }
  26
  27         @Override
  28         public void documentChanged(DocumentEvent event)
  29         {
  30                 if (this.marker != null)
  31                 {
  32                         try
  33                         {
  34                                 this.marker.delete();
  35                         }
  36                         catch (CoreException e)
  37                         {
  38                                 e.printStackTrace();
  39                         }
  40                         this.marker = null;
  41                 }
  42                 try (StringReader reader = new StringReader(event.getDocument().get());)
  43                 {
  44                         DocumentBuilder documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
  45                         documentBuilder.parse(new InputSource(reader));
  46                 }
  47                 catch (Exception ex)
  48                 {
  49                         try
  50                         {
  51                                 this.marker = file.createMarker(IMarker.PROBLEM);
  52                                 this.marker.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_ERROR);
  53                                 this.marker.setAttribute(IMarker.MESSAGE, ex.getMessage());
  54                                 if (ex instanceof SAXParseException)
  55                                 {
  56                                         SAXParseException saxParseException = (SAXParseException) ex;
  57                                         int lineNumber = saxParseException.getLineNumber();
  58                                         int offset = event.getDocument().getLineInformation(lineNumber - 1).getOffset() + saxParseException.getColumnNumber()
  59                                                         - 1;
  60                                         this.marker.setAttribute(IMarker.LINE_NUMBER, lineNumber);
  61                                         this.marker.setAttribute(IMarker.CHAR_START, offset);
  62                                         this.marker.setAttribute(IMarker.CHAR_END, offset + 1);
  63                                 }
  64                         }
  65                         catch (Exception e)
  66                         {
  67                                 e.printStackTrace();
  68                         }
  69                 }
  70         }
  71
  72         @Override
  73         public void documentAboutToBeChanged(DocumentEvent event)
  74         {
  75         }
  76
  77 }