/*
* Copyright 2011-2014 Gregory Shrago
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.intellij.grammar.refactor;
import com.intellij.codeInsight.TargetElementUtilBase;
import com.intellij.lang.Language;
import com.intellij.lang.refactoring.InlineActionHandler;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiReference;
import com.intellij.psi.search.searches.ReferencesSearch;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.refactoring.util.CommonRefactoringUtil;
import org.intellij.grammar.BnfLanguage;
import org.intellij.grammar.psi.BnfAttrs;
import org.intellij.grammar.psi.BnfRule;
import org.intellij.grammar.psi.impl.GrammarUtil;
import java.util.Collection;
/**
* Created by IntelliJ IDEA.
* Date: 8/11/11
* Time: 1:56 PM
*
* @author Vadim Romansky
*/
public class BnfInlineRuleActionHandler extends InlineActionHandler {
@Override
public boolean isEnabledForLanguage(Language language) {
return (language == BnfLanguage.INSTANCE);
}
@Override
public boolean canInlineElement(PsiElement psiElement) {
return psiElement instanceof BnfRule;
}
@Override
public void inlineElement(Project project, Editor editor, PsiElement psiElement) {
BnfRule rule = (BnfRule)psiElement;
BnfAttrs attrs = rule.getAttrs();
if (PsiTreeUtil.hasErrorElements(rule)) {
CommonRefactoringUtil.showErrorHint(project, editor, "Rule has errors", "Inline Rule", null);
return;
}
if (attrs != null && !attrs.getAttrList().isEmpty()) {
CommonRefactoringUtil.showErrorHint(project, editor, "Rule has attributes", "Inline Rule", null);
return;
}
Collection<PsiReference> allReferences = ReferencesSearch.search(psiElement).findAll();
if (allReferences.isEmpty()) {
CommonRefactoringUtil.showErrorHint(project, editor, "Rule is never used", "Inline Rule", null);
return;
}
boolean hasNonAttributeRefs = false;
for (PsiReference ref : allReferences) {
if (!GrammarUtil.isInAttributesReference(ref.getElement())) {
hasNonAttributeRefs = true;
break;
}
}
if (!hasNonAttributeRefs) {
CommonRefactoringUtil.showErrorHint(project, editor, "Rule is referenced only in attributes", "Inline Rule", null);
return;
}
if (!CommonRefactoringUtil.checkReadOnlyStatus(project, rule)) return;
PsiReference reference = editor != null ? TargetElementUtilBase.findReference(editor, editor.getCaretModel().getOffset()) : null;
if (reference != null && !rule.equals(reference.resolve())) {
reference = null;
}
InlineRuleDialog dialog = new InlineRuleDialog(project, rule, reference);
dialog.show();
}
}