| /* |
| * Copyright 2007 Sascha Weinreuter |
| * |
| * 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.lang.xpath.xslt.validation; |
| |
| import org.intellij.lang.xpath.xslt.XsltSupport; |
| import org.intellij.lang.xpath.xslt.psi.XsltParameter; |
| import org.intellij.lang.xpath.xslt.psi.XsltVariable; |
| import org.intellij.lang.xpath.xslt.quickfix.DeleteUnusedParameterFix; |
| import org.intellij.lang.xpath.xslt.quickfix.DeleteUnusedVariableFix; |
| import org.intellij.lang.xpath.xslt.quickfix.DeleteUnusedElementBase; |
| import org.intellij.lang.xpath.xslt.util.XsltCodeInsightUtil; |
| |
| import com.intellij.codeInspection.LocalQuickFix; |
| import com.intellij.codeInspection.ProblemHighlightType; |
| import com.intellij.codeInspection.ProblemsHolder; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiReference; |
| import com.intellij.psi.search.LocalSearchScope; |
| import com.intellij.psi.search.SearchScope; |
| import com.intellij.psi.search.searches.ReferencesSearch; |
| import com.intellij.psi.xml.XmlAttribute; |
| import com.intellij.psi.xml.XmlTag; |
| import com.intellij.psi.xml.XmlAttributeValue; |
| import com.intellij.util.Query; |
| |
| import java.util.Collection; |
| |
| public class XsltValidator { |
| private XsltValidator() { |
| } |
| |
| public static void checkUnusedVariable(XsltVariable variable, ProblemsHolder holder) { |
| if (variable instanceof XsltParameter) { |
| if (((XsltParameter)variable).isAbstract()) { |
| return; |
| } |
| } else { |
| if (variable.isVoid()) { |
| return; |
| } |
| } |
| |
| final XmlTag tag = variable.getTag(); |
| final XmlTag templateTag = XsltCodeInsightUtil.getTemplateTag(tag, false); |
| if (templateTag == null) { |
| return; |
| } |
| final XmlAttribute attribute = tag.getAttribute("name"); |
| if (attribute == null) { |
| return; |
| } |
| final PsiElement token = XsltSupport.getAttValueToken(attribute); |
| if (token == null) { |
| return; |
| } |
| |
| final SearchScope scope = new LocalSearchScope(templateTag); |
| final Query<PsiReference> refs = ReferencesSearch.search(variable, scope, false); |
| |
| if (isUnused(variable, refs)) { |
| final String name = variable.getName(); |
| assert name != null; |
| |
| final LocalQuickFix[] fixes; |
| if (variable instanceof XsltParameter) { |
| fixes = new LocalQuickFix[]{ new DeleteUnusedParameterFix(name, (XsltParameter)variable) }; |
| } else { |
| fixes = new LocalQuickFix[]{ new DeleteUnusedVariableFix(name, variable) }; |
| } |
| |
| holder.registerProblem(token, ((DeleteUnusedElementBase)fixes[0]).getType() + |
| " '" + name + "' is never used", ProblemHighlightType.LIKE_UNUSED_SYMBOL, fixes); |
| } |
| } |
| |
| private static boolean isUnused(PsiElement obj, Query<PsiReference> query) { |
| if (obj instanceof XsltParameter) { |
| final Collection<PsiReference> references = query.findAll(); |
| int n = references.size(); |
| for (PsiReference reference : references) { |
| final PsiElement element = reference.getElement(); |
| if (element instanceof XmlAttributeValue) { |
| final XmlAttribute parent = (XmlAttribute)element.getParent(); |
| if ("name".equals(parent.getName())) { |
| final XmlTag tag = parent.getParent(); |
| if (tag != null && "with-param".equals(tag.getLocalName())) { |
| n--; |
| } |
| } |
| } |
| } |
| return n == 0; |
| } else { |
| return query.findFirst() == null; |
| } |
| } |
| } |