1 | package de.ugoe.cs.swe.bnftools.utils;
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2 |
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3 | import java.util.ArrayList;
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4 | import java.util.List;
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5 |
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6 | import org.eclipse.emf.common.util.EList;
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7 | import org.eclipse.emf.ecore.EObject;
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8 | import org.eclipse.jface.text.BadLocationException;
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9 | import org.eclipse.jface.text.ITextSelection;
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10 | import org.eclipse.xtext.builder.builderState.impl.ReferenceDescriptionImpl;
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11 | import org.eclipse.xtext.parsetree.CompositeNode;
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12 | import org.eclipse.xtext.parsetree.NodeAdapter;
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13 | import org.eclipse.xtext.parsetree.NodeUtil;
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14 | import org.eclipse.xtext.resource.IEObjectDescription;
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15 | import org.eclipse.xtext.resource.IReferenceDescription;
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16 | import org.eclipse.xtext.resource.IResourceDescription;
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17 | import org.eclipse.xtext.resource.IResourceDescriptions;
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18 | import org.eclipse.xtext.ui.editor.XtextEditor;
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19 | import org.eclipse.xtext.ui.editor.model.IXtextDocument;
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20 |
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21 | import com.google.common.base.Predicate;
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22 | import com.google.common.collect.Iterables;
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23 |
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24 | import de.ugoe.cs.swe.bnftools.ebnf.EtsiBnf;
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25 | import de.ugoe.cs.swe.bnftools.ebnf.Rule;
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26 |
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27 | public class Utils {
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28 |
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29 | static public NodeAdapter findNodeFromSelection(
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30 | final XtextEditor xtextEditor, ITextSelection mySelection) {
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31 | NodeAdapter node = null;
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32 | if ((xtextEditor == null) || (xtextEditor.getDocument() == null))
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33 | return null;
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34 | EtsiBnf root = (EtsiBnf) xtextEditor.getDocument().readOnly(
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35 | new RootEObjectFinder());
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36 | EList<Rule> rules = root.getRule();
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37 | for (int i = 0; i < rules.size(); i++) {
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38 | node = NodeUtil.getNodeAdapter(rules.get(i));
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39 | if ((node.getParserNode().getOffset() <= mySelection.getOffset())
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40 | && (mySelection.getOffset() <= node.getParserNode()
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41 | .getOffset()
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42 | + node.getParserNode().getLength())) {
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43 | return node;
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44 | }
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45 | }
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46 | return null;
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47 | }
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48 |
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49 | // --------------------------------------------------------------------------------
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50 |
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51 | static public List<CompositeNode> findReferenceDescriptions(
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52 | final IEObjectDescription eObjectDescription, IResourceDescriptions resourceDescriptions, XtextEditor editor) {
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53 | //TODO: resolved nur innerhalb derselben datei!
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54 | List<CompositeNode> references = new ArrayList<CompositeNode>();
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55 |
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56 | for (IResourceDescription resourceDescription : resourceDescriptions
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57 | .getAllResourceDescriptions()) {
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58 | Iterable<IReferenceDescription> matchingReferenceDescriptors = Iterables
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59 | .filter(resourceDescription.getReferenceDescriptions(),
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60 | new Predicate<IReferenceDescription>() {
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61 | public boolean apply(IReferenceDescription input) {
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62 | return eObjectDescription
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63 | .getEObjectURI()
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64 | .equals(input.getTargetEObjectUri());
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65 | }
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66 | });
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67 | for (IReferenceDescription matchingReferenceDescription : matchingReferenceDescriptors) {
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68 | //TODO: dieser check ignoriert links zu anderen dateien wg. exception
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69 | if ((matchingReferenceDescription instanceof org.eclipse.xtext.resource.impl.DefaultReferenceDescription) || (matchingReferenceDescription instanceof ReferenceDescriptionImpl)){
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70 | CompositeNode node = editor.getDocument().readOnly(
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71 | new URIFragmentResolver(matchingReferenceDescription
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72 | .getSourceEObjectUri().fragment()));
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73 | references.add(node);
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74 | }
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75 | }
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76 | }
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77 | return references;
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78 | }
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79 |
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80 | // --------------------------------------------------------------------------------
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81 |
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82 | static public List<CompositeNode> findReferences(EObject o, IResourceDescriptions resourceDescriptions, XtextEditor editor) {
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83 | final IEObjectDescription eObjectDescription = editor.getDocument()
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84 | .readOnly(new EObjectResolver(o, resourceDescriptions));
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85 |
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86 | List<CompositeNode> referenceDescriptions = Utils.findReferenceDescriptions(eObjectDescription, resourceDescriptions, editor);
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87 | return referenceDescriptions;
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88 | }
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89 |
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90 | // --------------------------------------------------------------------------------
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91 |
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92 | static public int stepBackNewlines(IXtextDocument document, int offset) {
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93 | if (offset <= 0)
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94 | return 0;
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95 |
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96 | try {
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97 | int tempOffset = offset;
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98 | String str = document.get(tempOffset-1, 1);
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99 | while (str.equals("\n") || str.equals("\r") || str.equals(" ")) {
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100 | tempOffset -= 1;
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101 | str = document.get(tempOffset-1, 1);
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102 | }
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103 | return offset - tempOffset;
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104 | } catch (BadLocationException e) {
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105 | e.printStackTrace();
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106 | }
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107 | return 0;
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108 | }
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109 |
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110 | }
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