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

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