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.TextEditGroup;
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20 | import org.eclipse.xtext.parsetree.CompositeNode;
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21 | import org.eclipse.xtext.ui.editor.XtextEditor;
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22 | import org.eclipse.xtext.ui.editor.model.IXtextDocument;
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23 |
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24 | import de.ugoe.cs.swe.bnftools.utils.Utils;
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25 |
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26 | public class RemoveUnusedRulesProcessor extends RefactoringProcessor {
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27 | IFile file;
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28 | private List<CompositeNode> unusedRuleNodes;
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29 | private IXtextDocument document;
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30 |
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31 | // ----------------------------------------------------------------------------------------------------
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32 |
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33 | public RemoveUnusedRulesProcessor(XtextEditor editor, IXtextDocument doc, List<CompositeNode> unusedRuleNodes) {
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34 | file = (IFile) editor.getEditorInput().getAdapter(IFile.class);
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35 | this.unusedRuleNodes = unusedRuleNodes;
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36 | this.document = doc;
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37 | }
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38 |
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39 | // ----------------------------------------------------------------------------------------------------
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40 |
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41 | @Override
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42 | public Object[] getElements() {
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43 | return null;
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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 String getIdentifier() {
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50 | return "Remove Unused Rules Processor";
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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 getProcessorName() {
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57 | return "Remove Unused Rules 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 boolean isApplicable() throws CoreException {
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64 | return (unusedRuleNodes != null) && (unusedRuleNodes.size() > 0);
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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 RefactoringStatus checkInitialConditions(IProgressMonitor pm)
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71 | throws CoreException, OperationCanceledException {
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72 |
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73 | RefactoringStatus status = new RefactoringStatus();
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74 |
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75 | if (unusedRuleNodes == null) {
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76 | status.addFatalError("No unused rule node!");
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77 | } else if (unusedRuleNodes.size() == 0) {
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78 | status.addFatalError("No unused rule node!");
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79 | }
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80 | return status;
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81 | }
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82 |
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83 | // ----------------------------------------------------------------------------------------------------
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84 |
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85 | @Override
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86 | public RefactoringStatus checkFinalConditions(IProgressMonitor pm,
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87 | CheckConditionsContext context) throws CoreException,
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88 | OperationCanceledException {
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89 |
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90 | return checkInitialConditions(pm);
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91 | }
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92 |
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93 | // ----------------------------------------------------------------------------------------------------
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94 |
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95 | @Override
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96 | public Change createChange(IProgressMonitor pm) throws CoreException,
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97 | OperationCanceledException {
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98 | /*
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99 | * Create a change, initialise the IProgressMonitor with 2 task:
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100 | * 1. renaming the reference with the rule's right side
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101 | * 2. renaming the whole rule with an empty string
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102 | */
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103 | CompositeChange compositeChange = new CompositeChange("Remove Unused Rules");
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104 | pm.beginTask("Remove Unused Rules", unusedRuleNodes.size());
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105 |
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106 | //initialising the edit
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107 | MultiTextEdit multiEdit = new MultiTextEdit();
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108 | TextFileChange fileChange = new TextFileChange("Remove Unused Rule", file);
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109 | fileChange.setEdit(multiEdit);
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110 | fileChange.setTextType("bnf");
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111 | compositeChange.add(fileChange);
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112 |
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113 | for (int i=0; i < unusedRuleNodes.size(); i++) {
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114 | CompositeNode declarationRule = unusedRuleNodes.get(i);
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115 |
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116 | // delete the declaration
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117 | int offset = declarationRule.getOffset();
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118 | int amount = Utils.stepBackNewlines(document, offset);
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119 |
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120 | DeleteEdit deleteEdit = new DeleteEdit(offset-amount, declarationRule.getLength()+amount);
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121 | multiEdit.addChild(deleteEdit);
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122 | TextEditGroup editGroup = new TextEditGroup("declaration removal", deleteEdit);
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123 | fileChange.addTextEditGroup(editGroup);
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124 | pm.worked(1);
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125 | }
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126 |
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127 | return compositeChange;
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128 |
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129 | }
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130 |
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131 | // ----------------------------------------------------------------------------------------------------
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132 |
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133 | @Override
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134 | public RefactoringParticipant[] loadParticipants(RefactoringStatus status,
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135 | SharableParticipants sharedParticipants) throws CoreException {
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136 | return null;
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137 | }
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138 |
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139 | // ----------------------------------------------------------------------------------------------------
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140 |
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141 |
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142 | } |
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