| 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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