[5] | 1 | package de.ugoe.cs.swe.bnftools.ui.quickfix.processors;
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| 2 |
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| 3 | import java.util.List;
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| 4 |
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| 5 | import org.eclipse.core.resources.IFile;
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| 6 | import org.eclipse.core.runtime.CoreException;
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| 7 | import org.eclipse.core.runtime.IProgressMonitor;
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| 8 | import org.eclipse.core.runtime.OperationCanceledException;
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| 9 | import org.eclipse.ltk.core.refactoring.Change;
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| 10 | import org.eclipse.ltk.core.refactoring.CompositeChange;
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| 11 | import org.eclipse.ltk.core.refactoring.RefactoringStatus;
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| 12 | import org.eclipse.ltk.core.refactoring.TextFileChange;
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| 13 | import org.eclipse.ltk.core.refactoring.participants.CheckConditionsContext;
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| 14 | import org.eclipse.ltk.core.refactoring.participants.RefactoringParticipant;
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| 15 | import org.eclipse.ltk.core.refactoring.participants.RefactoringProcessor;
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| 16 | import org.eclipse.ltk.core.refactoring.participants.SharableParticipants;
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| 17 | import org.eclipse.text.edits.DeleteEdit;
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| 18 | import org.eclipse.text.edits.MultiTextEdit;
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| 19 | import org.eclipse.text.edits.ReplaceEdit;
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| 20 | import org.eclipse.text.edits.TextEditGroup;
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| 21 | import org.eclipse.xtext.parsetree.CompositeNode;
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| 22 | import org.eclipse.xtext.ui.editor.XtextEditor;
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| 23 | import org.eclipse.xtext.ui.editor.model.IXtextDocument;
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| 24 |
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| 25 | import de.ugoe.cs.swe.bnftools.analysis.EbnfAnalysisUtils;
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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.RuleReference;
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| 28 | import de.ugoe.cs.swe.bnftools.utils.DeclarationReferencesPair;
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| 29 | import de.ugoe.cs.swe.bnftools.utils.Utils;
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| 30 |
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| 31 | public class ReplacePassthroughRuleProcessor extends RefactoringProcessor {
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| 32 | IFile file;
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| 33 | private List<DeclarationReferencesPair> nodePairs;
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| 34 | private boolean isRemoveLine;
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| 35 | private IXtextDocument document;
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| 36 |
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| 37 | // ----------------------------------------------------------------------------------------------------
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| 38 |
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| 39 | public ReplacePassthroughRuleProcessor(XtextEditor editor, IXtextDocument doc, List<DeclarationReferencesPair> nodePairs, boolean removal) {
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| 40 | file = (IFile) editor.getEditorInput().getAdapter(IFile.class);
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| 41 | this.nodePairs = nodePairs;
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| 42 | this.isRemoveLine = removal;
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| 43 | this.document = doc;
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| 44 | }
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| 45 |
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| 46 | // ----------------------------------------------------------------------------------------------------
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| 47 |
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| 48 | @Override
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| 49 | public Object[] getElements() {
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| 50 | return null;
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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 | @Override
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| 56 | public String getIdentifier() {
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| 57 | return "Replace Passthrough Rule Processor";
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| 58 | }
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| 59 |
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| 60 | // ----------------------------------------------------------------------------------------------------
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| 61 |
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| 62 | @Override
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| 63 | public String getProcessorName() {
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| 64 | return "Replace Passthrough Rule Processor";
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| 65 | }
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| 66 |
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| 67 | // ----------------------------------------------------------------------------------------------------
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| 68 |
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| 69 | @Override
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| 70 | public boolean isApplicable() throws CoreException {
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| 71 | if ((nodePairs != null) && (nodePairs.size() > 0))
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| 72 | return false;
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| 73 |
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| 74 |
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| 75 | return true;
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| 76 | }
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| 77 |
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| 78 | // ----------------------------------------------------------------------------------------------------
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| 79 |
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| 80 | @Override
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| 81 | public RefactoringStatus checkInitialConditions(IProgressMonitor pm)
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| 82 | throws CoreException, OperationCanceledException {
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| 83 |
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| 84 | RefactoringStatus status = new RefactoringStatus();
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| 85 |
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| 86 | if (nodePairs == null) {
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| 87 | status.addFatalError("No passthrough rules to replace!");
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| 88 | } else if (nodePairs.size() == 0) {
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| 89 | status.addFatalError("No passthrough rules to replace!");
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| 90 | }
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| 91 |
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| 92 | boolean isNodeWithReferences = false;
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| 93 | for (int i=0; i < nodePairs.size(); i++) {
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| 94 | if (nodePairs.get(i).getReferenceNodes().size() > 0) {
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| 95 | isNodeWithReferences = true;
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| 96 | }
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| 97 | }
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| 98 |
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| 99 | if (!isNodeWithReferences)
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| 100 | status.addFatalError("No passthrough rules to replace!");
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| 101 |
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| 102 | return status;
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| 103 | }
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| 104 |
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| 105 | // ----------------------------------------------------------------------------------------------------
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| 106 |
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| 107 | @Override
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| 108 | public RefactoringStatus checkFinalConditions(IProgressMonitor pm,
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| 109 | CheckConditionsContext context) throws CoreException,
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| 110 | OperationCanceledException {
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| 111 |
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| 112 | return checkInitialConditions(pm);
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| 113 | }
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| 114 |
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| 115 | // ----------------------------------------------------------------------------------------------------
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| 116 |
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| 117 | @Override
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| 118 | public Change createChange(IProgressMonitor pm) throws CoreException,
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| 119 | OperationCanceledException {
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| 120 | /*
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| 121 | * Create a change, initialise the IProgressMonitor with 2 task:
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| 122 | * 1. renaming the reference with the rule's right side
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| 123 | * 2. renaming the whole rule with an empty string
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| 124 | */
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| 125 | CompositeChange compositeChange = new CompositeChange("Replace Passthrough Rule");
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| 126 | pm.beginTask("Replace Passthrough Rule Refactoring", nodePairs.size());
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| 127 |
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| 128 | //initialising the edit
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| 129 | MultiTextEdit multiEdit = new MultiTextEdit();
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| 130 | TextFileChange fileChange = new TextFileChange("Replace Passthrough Rule", file);
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| 131 | fileChange.setEdit(multiEdit);
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| 132 | fileChange.setTextType("bnf");
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| 133 | compositeChange.add(fileChange);
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| 134 |
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| 135 | for (int i=0; i < nodePairs.size(); i++) {
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| 136 | CompositeNode declarationRule = nodePairs.get(i).getDeclarationNode();
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| 137 | List<CompositeNode> ruleReferences = nodePairs.get(i).getReferenceNodes();
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| 138 | // get the replacement name
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| 139 | Rule rule = (Rule) declarationRule.getElement();
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| 140 | RuleReference rightSideRule = EbnfAnalysisUtils.getPassthroughRuleReference(rule);
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| 141 | String replaceRuleName = rightSideRule.getRuleref().getName();
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| 142 |
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| 143 | // replace references with passthrough rule name
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| 144 | for (int j=0; j < ruleReferences.size(); j++) {
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| 145 | CompositeNode ruleReference = ruleReferences.get(j);
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| 146 | ReplaceEdit replaceEdit = new ReplaceEdit(ruleReference.getOffset(), ruleReference.getLength(), replaceRuleName);
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| 147 | multiEdit.addChild(replaceEdit);
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| 148 | TextEditGroup editGroup2 = new TextEditGroup("reference renaming", replaceEdit);
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| 149 | fileChange.addTextEditGroup(editGroup2);
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| 150 | pm.worked(1);
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| 151 | }
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| 152 |
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| 153 | // remove old line
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| 154 | if (isRemoveLine) {
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| 155 | int amount = Utils.stepBackNewlines(document, declarationRule.getOffset());
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| 156 | DeleteEdit deleteEdit = new DeleteEdit(declarationRule.getOffset() - amount, declarationRule.getLength() + amount);
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| 157 | multiEdit.addChild(deleteEdit);
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| 158 | TextEditGroup editGroup3 = new TextEditGroup("remove old line", deleteEdit);
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| 159 | fileChange.addTextEditGroup(editGroup3);
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| 160 | pm.worked(1);
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| 161 | }
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| 162 | }
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| 163 |
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| 164 | return compositeChange;
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| 165 |
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| 166 | }
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| 167 |
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| 168 | // ----------------------------------------------------------------------------------------------------
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| 169 |
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| 170 | @Override
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| 171 | public RefactoringParticipant[] loadParticipants(RefactoringStatus status,
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| 172 | SharableParticipants sharedParticipants) throws CoreException {
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| 173 | return null;
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| 174 | }
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| 175 |
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| 176 | // ----------------------------------------------------------------------------------------------------
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| 177 |
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| 178 |
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| 179 | } |
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