[9] | 1 | package de.ugoe.cs.swe.bnftools.ui.formatter;
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| 2 |
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[21] | 3 | import java.util.ArrayList;
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| 4 |
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[9] | 5 | import org.eclipse.emf.ecore.EObject;
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[21] | 6 | import org.eclipse.xtext.parsetree.AbstractNode;
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| 7 | import org.eclipse.xtext.parsetree.CompositeNode;
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| 8 | import org.eclipse.xtext.parsetree.LeafNode;
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| 9 | import org.eclipse.xtext.parsetree.NodeUtil;
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[9] | 10 |
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| 11 | import de.ugoe.cs.swe.bnftools.ebnf.Atom;
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[13] | 12 | import de.ugoe.cs.swe.bnftools.ebnf.BnfEntry;
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[9] | 13 | import de.ugoe.cs.swe.bnftools.ebnf.DefinitionList;
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[13] | 14 | import de.ugoe.cs.swe.bnftools.ebnf.DeltaEntry;
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[9] | 15 | import de.ugoe.cs.swe.bnftools.ebnf.EtsiBnf;
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| 16 | import de.ugoe.cs.swe.bnftools.ebnf.ExtRule;
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| 17 | import de.ugoe.cs.swe.bnftools.ebnf.GlobalCombinator;
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| 18 | import de.ugoe.cs.swe.bnftools.ebnf.GroupedSequence;
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| 19 | import de.ugoe.cs.swe.bnftools.ebnf.HookCombinator;
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[12] | 20 | import de.ugoe.cs.swe.bnftools.ebnf.Import;
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[13] | 21 | import de.ugoe.cs.swe.bnftools.ebnf.ImportSection;
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| 22 | import de.ugoe.cs.swe.bnftools.ebnf.MergeEntry;
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[9] | 23 | import de.ugoe.cs.swe.bnftools.ebnf.MergeRule;
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| 24 | import de.ugoe.cs.swe.bnftools.ebnf.OptionalSequence;
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| 25 | import de.ugoe.cs.swe.bnftools.ebnf.RepeatedSequence;
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| 26 | import de.ugoe.cs.swe.bnftools.ebnf.Rule;
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| 27 | import de.ugoe.cs.swe.bnftools.ebnf.RuleCombinator;
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| 28 | import de.ugoe.cs.swe.bnftools.ebnf.RuleReference;
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| 29 | import de.ugoe.cs.swe.bnftools.ebnf.SectionHeading;
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| 30 | import de.ugoe.cs.swe.bnftools.ebnf.SingleDefinition;
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| 31 | import de.ugoe.cs.swe.bnftools.ebnf.StringRule;
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| 32 | import de.ugoe.cs.swe.bnftools.ebnf.Term;
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| 33 | import de.ugoe.cs.swe.bnftools.visitor.EbnfVisitor;
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| 34 |
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| 35 | public class EbnfFormatterVisitor extends EbnfVisitor {
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| 36 | private StringBuffer buf;
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| 37 | private FormatterConfig config;
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[21] | 38 | private int bufferPosition = 0;
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| 39 | private int bufferPositionOriginalText = 0;
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| 40 | private int allCommentsPosition = 0;
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| 41 | private ArrayList<LeafNode> allComments = new ArrayList<LeafNode>();
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| 42 |
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[17] | 43 | private boolean lastWasSectionHeading=false;
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[21] | 44 | private CompositeNode parserEtsiBnfNode;
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| 45 | private String originalText;
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| 46 | private int bufferPositionFormattedText;
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| 47 | private String formattedText;
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| 48 | private String bufNoWhitespaces;
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[23] | 49 | private String originalTextNoWhitespaces;
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[17] | 50 |
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[9] | 51 | public EbnfFormatterVisitor(EObject rootNode, FormatterConfig config) {
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| 52 | super(rootNode);
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| 53 | this.config = config;
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| 54 | buf = new StringBuffer();
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| 55 | }
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| 56 |
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| 57 | public EbnfFormatterVisitor(FormatterConfig config) {
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| 58 | this.config = config;
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| 59 | buf = new StringBuffer();
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| 60 | }
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| 61 |
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| 62 | public StringBuffer getBuf() {
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| 63 | return buf;
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| 64 | }
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| 65 |
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[21] | 66 | private boolean isCommentNode(LeafNode node) {
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| 67 | if ((node.getText().trim().startsWith("//") || node.getText().trim().startsWith("/*")) && (node.isHidden()))
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| 68 | return true;
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| 69 | return false;
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| 70 | }
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| 71 |
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| 72 | private void collectAllComments(CompositeNode node) {
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| 73 | for (int i=0; i < node.getChildren().size(); i++) {
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| 74 | AbstractNode currentNode = node.getChildren().get(i);
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| 75 | if (currentNode instanceof LeafNode) {
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| 76 | LeafNode leafNode = (LeafNode) currentNode;
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| 77 | if (isCommentNode(leafNode)) {
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| 78 | allComments.add(leafNode);
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| 79 | }
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| 80 | }
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| 81 |
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| 82 | if (currentNode instanceof CompositeNode) {
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| 83 | collectAllComments((CompositeNode) currentNode);
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| 84 | }
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| 85 | }
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| 86 | }
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| 87 |
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| 88 | private boolean isSingleLineComment(String str) {
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| 89 | if (str.startsWith("//"))
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| 90 | return true;
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| 91 | return false;
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| 92 | }
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| 93 |
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| 94 | private boolean isMultiLineComment(String str) {
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| 95 | if (str.startsWith("/*"))
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| 96 | return true;
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| 97 | return false;
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| 98 | }
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| 99 |
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| 100 | private boolean isWhitespace(char ch) {
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| 101 | if ((ch==' ') || (ch == '\t') || (ch == '\n') || (ch == '\r'))
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| 102 | return true;
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| 103 | return false;
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| 104 | }
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| 105 |
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| 106 | private void skipWhitespacesOriginalText() {
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| 107 | while (isWhitespace(originalText.charAt(bufferPositionOriginalText))) {
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| 108 | bufferPositionOriginalText++;
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| 109 | }
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| 110 | }
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| 111 |
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| 112 | private void skipWhitespacesFormattedText(StringBuffer result) {
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| 113 | while (isWhitespace(formattedText.charAt(bufferPositionFormattedText))) {
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| 114 | result.append(formattedText.substring(bufferPositionFormattedText, bufferPositionFormattedText+1));
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| 115 | bufferPositionFormattedText++;
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| 116 | }
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| 117 | }
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| 118 |
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| 119 | private boolean isSingleLineCommentNext(String str, int position) {
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| 120 | if ((str.charAt(position) == '/') && (str.charAt(position) == '/'))
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| 121 | return true;
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| 122 | return false;
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| 123 | }
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| 124 |
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| 125 | private boolean isMultiLineCommentNext(String str, int position) {
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| 126 | if ((str.charAt(position) == '/') && (str.charAt(position) == '*'))
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| 127 | return true;
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| 128 | return false;
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| 129 | }
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| 130 |
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| 131 | private boolean isCommentNext(String str, int position) {
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| 132 | if (isSingleLineCommentNext(str, position) || isMultiLineCommentNext(str, position))
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| 133 | return true;
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| 134 | else
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| 135 | return false;
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| 136 | }
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| 137 |
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[22] | 138 | private String scanBackWhitespaces(String str, int position) {
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| 139 | StringBuffer whiteSpaces = new StringBuffer();
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| 140 | int currentPosition = position;
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| 141 | while (isWhitespace(str.charAt(currentPosition))) {
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| 142 | whiteSpaces.append(str.charAt(currentPosition));
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| 143 | currentPosition--;
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| 144 | }
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| 145 | return whiteSpaces.toString();
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| 146 | }
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| 147 |
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| 148 | private String stripEndingNewline(String str) {
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| 149 | int position = str.length() - 1;
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| 150 | while ((str.charAt(position) == '\n') || (str.charAt(position) == '\r')) {
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| 151 | position--;
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| 152 | }
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| 153 | return str.substring(0, position + 1);
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| 154 | }
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| 155 |
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[21] | 156 | private void weaveComments() {
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| 157 | bufferPosition = 0;
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| 158 | bufferPositionOriginalText = 0;
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| 159 | bufferPositionFormattedText = 0;
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| 160 |
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| 161 | StringBuffer result = new StringBuffer();
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| 162 | bufNoWhitespaces = buf.toString().replaceAll("[ \t\n\r]", "");
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| 163 | formattedText = buf.toString();
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| 164 |
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| 165 | while (bufferPosition < bufNoWhitespaces.length()) {
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| 166 | skipWhitespacesOriginalText();
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| 167 | skipWhitespacesFormattedText(result);
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| 168 |
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| 169 | if (bufNoWhitespaces.charAt(bufferPosition) != originalText.charAt(bufferPositionOriginalText)) {
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| 170 | if (isCommentNext(originalText, bufferPositionOriginalText)) {
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| 171 | LeafNode currentComment = allComments.get(allCommentsPosition);
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| 172 | if (currentComment.getTotalOffset() == bufferPositionOriginalText) {
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| 173 | if (isMultiLineComment(currentComment.getText())) {
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[22] | 174 | result.append(currentComment.getText());
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[21] | 175 | result.append("\n");
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[23] | 176 | } else if (isSingleLineComment(currentComment.getText())) {
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[22] | 177 | String lastWhiteSpaces = scanBackWhitespaces(result.toString(), result.toString().length()-1);
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| 178 | result.delete(result.toString().length() - lastWhiteSpaces.length(), result.toString().length());
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| 179 | result.append(" " + stripEndingNewline(currentComment.getText()));
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| 180 | result.append(lastWhiteSpaces);
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| 181 | }
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[21] | 182 | bufferPositionOriginalText+=currentComment.getLength();
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| 183 | allCommentsPosition++;
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| 184 | }
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| 185 | }
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| 186 | } else {
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| 187 | result.append(formattedText.substring(bufferPositionFormattedText, bufferPositionFormattedText+1));
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| 188 |
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| 189 | bufferPositionOriginalText++;
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| 190 | bufferPositionFormattedText++;
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| 191 | bufferPosition++;
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| 192 | }
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| 193 | }
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| 194 | buf = result;
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| 195 |
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| 196 | }
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[23] | 197 |
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[21] | 198 |
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[9] | 199 | // -----------------------------------------------------------------------------
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| 200 |
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[11] | 201 | protected void visitBefore(EtsiBnf node) {
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[21] | 202 | parserEtsiBnfNode = NodeUtil.getNodeAdapter(node).getParserNode();
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| 203 | collectAllComments(parserEtsiBnfNode);
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| 204 | originalText = NodeUtil.getNodeAdapter(node).getParserNode().serialize();
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| 205 | originalTextNoWhitespaces = originalText.replaceAll("[ \t\n\r]", "");
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| 206 |
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| 207 | //System.out.println(allComments.toString());
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[9] | 208 | buf.append("grammar " + node.getName());
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| 209 | if (node.getType() != null)
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| 210 | buf.append(node.getType());
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| 211 | buf.append(";");
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[21] | 212 |
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| 213 | buf.append("\n\n");
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[9] | 214 | }
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| 215 |
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[11] | 216 | protected void visitAfter(EtsiBnf node) {
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[21] | 217 | weaveComments();
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[9] | 218 | }
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| 219 |
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[13] | 220 | protected void visitBefore(ImportSection node) {
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| 221 | }
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| 222 |
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| 223 | protected void visitAfter(ImportSection node) {
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| 224 | buf.append("\n");
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| 225 | }
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| 226 |
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| 227 | protected void visitBefore(BnfEntry node) {
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| 228 | }
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| 229 |
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| 230 | protected void visitAfter(BnfEntry node) {
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| 231 | }
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| 232 |
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| 233 | protected void visitBefore(DeltaEntry node) {
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| 234 | }
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| 235 |
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| 236 | protected void visitAfter(DeltaEntry node) {
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| 237 | }
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| 238 |
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| 239 | protected void visitBefore(MergeEntry node) {
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| 240 | }
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| 241 |
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| 242 | protected void visitAfter(MergeEntry node) {
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| 243 | }
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| 244 |
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[11] | 245 | protected void visitBefore(Atom node) {
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[9] | 246 | }
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| 247 |
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[11] | 248 | protected void visitAfter(Atom node) {
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[9] | 249 | }
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| 250 |
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[11] | 251 | protected void visitBefore(Term node) {
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[9] | 252 | }
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| 253 |
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[11] | 254 | protected void visitAfter(Term node) {
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[12] | 255 | if (!isLastElement())
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[11] | 256 | buf.append(" ");
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[9] | 257 | }
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| 258 |
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[11] | 259 | protected void visitBefore(DefinitionList node) {
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[9] | 260 | }
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| 261 |
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[11] | 262 | protected void visitAfter(DefinitionList node) {
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[9] | 263 | }
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| 264 |
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[11] | 265 | protected void visitBefore(ExtRule node) {
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[9] | 266 | }
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| 267 |
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[11] | 268 | protected void visitAfter(ExtRule node) {
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[9] | 269 | }
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| 270 |
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[11] | 271 | protected void visitBefore(GlobalCombinator node) {
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[9] | 272 | }
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| 273 |
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[11] | 274 | protected void visitAfter(GlobalCombinator node) {
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[9] | 275 | }
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| 276 |
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[11] | 277 | protected void visitBefore(GroupedSequence node) {
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| 278 | buf.append("(");
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[9] | 279 | }
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| 280 |
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[11] | 281 | protected void visitAfter(GroupedSequence node) {
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| 282 | buf.append(")");
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[9] | 283 | }
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| 284 |
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[11] | 285 | protected void visitBefore(HookCombinator node) {
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[9] | 286 | }
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| 287 |
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[11] | 288 | protected void visitAfter(HookCombinator node) {
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[9] | 289 | }
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| 290 |
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[11] | 291 | protected void visitBefore(Import node) {
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[21] | 292 | buf.append("import \"" + node.getImportURI() + "\";");
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| 293 | buf.append("\n");
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[9] | 294 | }
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| 295 |
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[11] | 296 | protected void visitAfter(Import node) {
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[9] | 297 | }
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| 298 |
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[11] | 299 | protected void visitBefore(MergeRule node) {
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| 300 | }
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| 301 |
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| 302 | protected void visitAfter(MergeRule node) {
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| 303 | }
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| 304 |
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| 305 | protected void visitBefore(OptionalSequence node) {
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[12] | 306 | buf.append("[");
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[11] | 307 | }
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| 308 |
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| 309 | protected void visitAfter(OptionalSequence node) {
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[12] | 310 | buf.append("]");
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[11] | 311 | }
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| 312 |
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| 313 | protected void visitBefore(RepeatedSequence node) {
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[12] | 314 | buf.append("{");
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[11] | 315 | }
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| 316 |
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| 317 | protected void visitAfter(RepeatedSequence node) {
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[12] | 318 | buf.append("}");
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| 319 | if (node.isMorethanonce())
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| 320 | buf.append("+");
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[11] | 321 | }
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| 322 |
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| 323 | protected void visitBefore(Rule node) {
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[17] | 324 | if (lastWasSectionHeading)
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| 325 | buf.append("\n");
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| 326 |
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| 327 | lastWasSectionHeading=false;
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| 328 |
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[11] | 329 | if (node.getRulenumber() > 0)
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| 330 | buf.append(node.getRulenumber() + ". ");
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| 331 |
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| 332 | buf.append(node.getName() + " ::= ");
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| 333 | }
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| 334 |
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| 335 | protected void visitAfter(Rule node) {
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[21] | 336 | buf.append(";");
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| 337 | // appendComments(node);
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| 338 | buf.append("\n");
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[11] | 339 | }
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| 340 |
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| 341 | protected void visitBefore(RuleCombinator node) {
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| 342 | }
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| 343 |
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| 344 | protected void visitAfter(RuleCombinator node) {
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| 345 | }
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| 346 |
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| 347 | protected void visitBefore(RuleReference node) {
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[12] | 348 | buf.append(node.getRuleref().getName());
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[11] | 349 | }
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| 350 |
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| 351 | protected void visitAfter(RuleReference node) {
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| 352 | }
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| 353 |
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| 354 | protected void visitBefore(SectionHeading node) {
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[17] | 355 | if (!lastWasSectionHeading && !buf.substring(buf.length()-2).equals("\n\n"))
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[13] | 356 | buf.append("\n");
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| 357 |
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[17] | 358 | lastWasSectionHeading=true;
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| 359 | // if (!lastWasSectionHeading || !buf.substring(buf.length()-2).equals("\n\n"))
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| 360 | // if (!buf.substring(buf.length()-2).equals("\n\n"))
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| 361 | // buf.append("\n");
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| 362 |
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[13] | 363 | buf.append(node.getSectionHeader());
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[11] | 364 | }
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| 365 |
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| 366 | protected void visitAfter(SectionHeading node) {
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[17] | 367 | // buf.append("\n");
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[11] | 368 | }
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| 369 |
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| 370 | protected void visitBefore(SingleDefinition node) {
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| 371 | }
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| 372 |
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| 373 | protected void visitAfter(SingleDefinition node) {
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[12] | 374 | if (!isLastElement())
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| 375 | buf.append(" | ");
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| 376 |
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[11] | 377 | }
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| 378 |
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| 379 | protected void visitBefore(StringRule node) {
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| 380 | if (node.getLiteral() != null)
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| 381 | buf.append("\"" + node.getLiteral() + "\"");
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| 382 | else if (node.getColon() != null)
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[12] | 383 | buf.append("\"\"\"");
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[11] | 384 | }
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| 385 |
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| 386 | protected void visitAfter(StringRule node) {
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| 387 | }
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| 388 |
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| 389 |
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| 390 |
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[9] | 391 | }
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