| 1 | package de.ugoe.cs.swe.bnftools.ui.syntaxcoloring;
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| 2 |
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| 3 | import org.eclipse.xtext.CrossReference;
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| 4 | import org.eclipse.xtext.parsetree.AbstractNode;
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| 5 | import org.eclipse.xtext.parsetree.LeafNode;
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| 6 | import org.eclipse.xtext.parsetree.NodeUtil;
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| 7 | import org.eclipse.xtext.resource.XtextResource;
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| 8 | import org.eclipse.xtext.ui.editor.syntaxcoloring.IHighlightedPositionAcceptor;
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| 9 | import org.eclipse.xtext.ui.editor.syntaxcoloring.ISemanticHighlightingCalculator;
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| 10 |
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| 11 | import de.ugoe.cs.swe.bnftools.analysis.EbnfAnalysisUtils;
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| 12 | import de.ugoe.cs.swe.bnftools.ebnf.Rule;
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| 13 |
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| 14 | public class EtsiBnfSemanticHighlightingCalculator implements
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| 15 | ISemanticHighlightingCalculator {
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| 16 |
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| 17 | public void provideHighlightingFor(XtextResource resource,
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| 18 | IHighlightedPositionAcceptor acceptor) {
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| 19 |
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| 20 | if (resource == null)
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| 21 | return;
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| 22 |
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| 23 | Iterable<AbstractNode> allNodes = NodeUtil.getAllContents(resource
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| 24 | .getParseResult().getRootNode());
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| 25 |
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| 26 | for (AbstractNode node : allNodes) {
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| 27 | if (node.getGrammarElement() instanceof CrossReference) {
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| 28 | acceptor.addPosition(node.getOffset(), node.getLength(),
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| 29 | EtsiBnfHighlightingConfiguration.CROSSREF_ID);
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| 30 | } else if (node.getElement() instanceof Rule) {
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| 31 | Rule rule = (Rule) node.getElement();
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| 32 |
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| 33 | int dividerPosition = 0;
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| 34 | for (int i = 0; i < node.getLeafNodes().size(); i++) {
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| 35 | LeafNode currentNode = node.getLeafNodes().get(i);
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| 36 | if (currentNode.getText().equals(rule.getName())) {
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| 37 | dividerPosition = currentNode.getOffset()
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| 38 | + currentNode.getLength();
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| 39 | break;
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| 40 | }
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| 41 | }
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| 42 | int length = dividerPosition - node.getOffset();
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| 43 | if (length > 0) {
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| 44 | if (EbnfAnalysisUtils.isTokenRule(rule)) {
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| 45 | acceptor.addPosition(node.getOffset(), length,
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| 46 | EtsiBnfHighlightingConfiguration.TOKENRULE_ID);
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| 47 | } else {
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| 48 | acceptor.addPosition(node.getOffset(), length,
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| 49 | EtsiBnfHighlightingConfiguration.RULENAME_ID);
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| 50 | }
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| 51 | }
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| 52 | }
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| 53 | }
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| 54 |
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| 55 | }
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| 56 |
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| 57 | }
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