software/no.uio.ifi.refaktor/src/no/uio/ifi/refaktor/utils/ParseUtils.java

   1 package no.uio.ifi.refaktor.utils;
   2
   3
   4 import org.eclipse.jdt.core.ICompilationUnit;
   5 import org.eclipse.jdt.core.dom.AST;
   6 import org.eclipse.jdt.core.dom.ASTNode;
   7 import org.eclipse.jdt.core.dom.ASTParser;
   8 import org.eclipse.jdt.core.dom.CompilationUnit;
   9 import org.eclipse.jdt.core.dom.NodeFinder;
  10 import org.eclipse.jdt.internal.core.dom.NaiveASTFlattener;
  11 import org.eclipse.jface.text.BadLocationException;
  12 import org.eclipse.jface.text.IDocument;
  13 import org.eclipse.jface.text.ITextSelection;
  14 import org.eclipse.jface.text.TextSelection;
  15
  16 @SuppressWarnings("restriction")
  17 public class ParseUtils {
  18
  19         public static CompilationUnit parse(ICompilationUnit unit) {
  20                 ASTParser parser = ParseUtils.createParser();
  21                 parser.setSource(unit);
  22                 return (CompilationUnit) parser.createAST(null);
  23         }
  24
  25         public static CompilationUnit parse(IDocument document) {
  26                 return ParseUtils.parse(document.get());
  27         }
  28
  29         public static CompilationUnit parse(String text) {
  30                 return ParseUtils.parse(text.toCharArray());
  31         }
  32
  33         public static CompilationUnit parse(char[] chars) {
  34                 ASTParser parser = ParseUtils.createParser();
  35                 parser.setSource(chars);
  36                 return (CompilationUnit) parser.createAST(null);
  37         }
  38
  39         public static ASTParser createParser() {
  40                 ASTParser parser = ASTParser.newParser(AST.JLS4);
  41                 parser.setKind(ASTParser.K_COMPILATION_UNIT);
  42                 parser.setResolveBindings(true);
  43                 return parser;
  44         }
  45
  46         public static TextSelection stripTextSelection(IDocument document, TextSelection textSelection) {
  47                 String text;
  48                 try {
  49                         text = document.get(textSelection.getOffset(), textSelection.getLength());
  50                 } catch (BadLocationException e) {
  51                         throw new RuntimeException(e);
  52                 }
  53
  54                 int lstrip = 0;
  55                 while (Character.isWhitespace(text.charAt(lstrip)))
  56                         lstrip++;
  57
  58                 int rstrip = 0;
  59                 int rIdx = text.length() - 1;
  60                 while (Character.isWhitespace(text.charAt(rIdx--)))
  61                         rstrip++;
  62
  63                 int newOffset = textSelection.getOffset() + lstrip;
  64                 int newLength = textSelection.getLength() - (lstrip + rstrip);
  65
  66                 return new TextSelection(document, newOffset, newLength);
  67         }
  68
  69         public static String getNodeDebugText(ASTNode node) {
  70                 NaiveASTFlattener printer = new NaiveASTFlattener();
  71                 node.accept(printer);
  72                 return printer.getResult();
  73         }
  74
  75         public static String getNodeText(ASTNode node, IDocument document) {
  76                 try {
  77                         return document.get(node.getStartPosition(), node.getLength());
  78                 } catch (BadLocationException e) {
  79                         throw new RuntimeException(e);
  80                 }
  81         }
  82
  83         public static NodeFinder getNodeFinder(IDocument document, ITextSelection selection) {
  84                 CompilationUnit cu = parse(document);
  85                 return new NodeFinder(cu.getRoot(), selection.getOffset(), selection.getLength());
  86         }
  87
  88
  89 }