| 1 | package de.ugoe.cs.swe.bnftools.ui.views.syntaxdiagram;
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| 2 |
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| 3 | import org.eclipse.emf.ecore.EObject;
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| 4 | import org.eclipse.xtext.parsetree.NodeAdapter;
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| 5 |
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| 6 | import de.ugoe.cs.swe.bnftools.ebnf.DefinitionList;
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| 7 | import de.ugoe.cs.swe.bnftools.ebnf.GroupedSequence;
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| 8 | import de.ugoe.cs.swe.bnftools.ebnf.OptionalSequence;
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| 9 | import de.ugoe.cs.swe.bnftools.ebnf.RepeatedSequence;
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| 10 | import de.ugoe.cs.swe.bnftools.ebnf.Rule;
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| 11 | import de.ugoe.cs.swe.bnftools.ebnf.RuleReference;
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| 12 | import de.ugoe.cs.swe.bnftools.ebnf.SingleDefinition;
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| 13 |
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| 14 | public class SyntaxDiagramCreator {
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| 15 |
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| 16 | private NodeAdapter node;
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| 17 |
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| 18 | public SyntaxDiagramCreator(NodeAdapter node) {
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| 19 | this.node = node;
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| 20 | }
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| 21 |
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| 22 | public SyntaxDiagramFigure createSyntaxDiagram() {
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| 23 | if (node == null)
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| 24 | return new SyntaxDiagramFigure();
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| 25 |
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| 26 | EObject ruleRoot = (EObject) node.getParserNode().getElement();
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| 27 |
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| 28 | SyntaxDiagramFigure syntaxDiagramFigure = create(ruleRoot);
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| 29 |
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| 30 | return syntaxDiagramFigure;
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| 31 | }
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| 32 |
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| 33 | private SyntaxDiagramFigure create(EObject o) {
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| 34 | if (o instanceof Rule) {
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| 35 | SyntaxDiagramFigure f = create(o.eContents().get(0));
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| 36 | return f;
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| 37 | } else if (o instanceof DefinitionList) {
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| 38 | if (o.eContents().size() == 1) {
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| 39 | SyntaxDiagramFigure f = create(o.eContents().get(0));
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| 40 | return f;
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| 41 | } else {
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| 42 | AlternativeFigure af = new AlternativeFigure();
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| 43 | for (int i=0; i < o.eContents().size();i++) {
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| 44 | SyntaxDiagramFigure f = create(o.eContents().get(i));
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| 45 | if (f != null)
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| 46 | af.addSyntaxFigure(f);
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| 47 | }
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| 48 | return af;
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| 49 | }
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| 50 | } else if (o instanceof SingleDefinition) {
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| 51 | SyntaxDiagram outer = new SyntaxDiagram();
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| 52 | for (int i=0; i < o.eContents().size();i++) {
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| 53 | SyntaxDiagramFigure f = create(o.eContents().get(i));
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| 54 | if (f != null)
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| 55 | outer.addSyntaxFigure(f);
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| 56 | }
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| 57 | outer.finish();
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| 58 | return outer;
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| 59 | } else if (o instanceof GroupedSequence) {
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| 60 | SyntaxDiagram syntaxDiagram = new SyntaxDiagram();
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| 61 | for (int i=0; i < o.eContents().size();i++) {
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| 62 | SyntaxDiagramFigure f = create(o.eContents().get(i));
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| 63 | if (f != null)
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| 64 | syntaxDiagram.addSyntaxFigure(f);
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| 65 | }
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| 66 | return syntaxDiagram;
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| 67 | } else if (o instanceof OptionalSequence) {
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| 68 | SyntaxDiagram syntaxDiagram = new SyntaxDiagram();
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| 69 | for (int i=0; i < o.eContents().size();i++) {
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| 70 | SyntaxDiagramFigure f = create(o.eContents().get(i));
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| 71 | if (f != null)
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| 72 | syntaxDiagram.addSyntaxFigure(f);
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| 73 | }
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| 74 | OptionFigure af = new OptionFigure(syntaxDiagram);
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| 75 | syntaxDiagram.finish();
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| 76 | return af;
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| 77 | } else if (o instanceof RepeatedSequence) {
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| 78 | RepeatedSequence e = (RepeatedSequence) o;
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| 79 | SyntaxDiagram syntaxDiagram = new SyntaxDiagram();
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| 80 | for (int i=0; i < o.eContents().size();i++) {
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| 81 | SyntaxDiagramFigure f = create(o.eContents().get(i));
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| 82 | if (f != null)
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| 83 | syntaxDiagram.addSyntaxFigure(f);
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| 84 | }
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| 85 | if (e.isMorethanonce()) {
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| 86 | RepetitionFigure rf = new RepetitionFigure(syntaxDiagram);
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| 87 | syntaxDiagram.finish();
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| 88 | return rf;
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| 89 | } else {
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| 90 | OptionRepetitionFigure rf = new OptionRepetitionFigure(syntaxDiagram);
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| 91 | syntaxDiagram.finish();
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| 92 | return rf;
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| 93 | }
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| 94 | } else if (o instanceof de.ugoe.cs.swe.bnftools.ebnf.StringRule) {
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| 95 | de.ugoe.cs.swe.bnftools.ebnf.StringRule e = (de.ugoe.cs.swe.bnftools.ebnf.StringRule) o;
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| 96 | if (e.getColon() != null)
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| 97 | return new TerminalFigure(e.getColon());
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| 98 | else
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| 99 | return new TerminalFigure(e.getLiteral());
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| 100 |
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| 101 | } else if (o instanceof RuleReference) {
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| 102 | RuleReference e = (RuleReference) o;
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| 103 | return new NonTerminalFigure(e.getRuleref().getName());
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| 104 | } else {
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| 105 | return create(o.eContents().get(0));
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| 106 | }
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| 107 |
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| 108 | // return null;
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| 109 | }
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| 110 |
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| 111 | }
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