/*
* Copyright 2012-2014 Sergey Ignatov
*
* 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.erlang.inspection;
import com.intellij.codeInsight.template.Template;
import com.intellij.codeInsight.template.TemplateManager;
import com.intellij.codeInsight.template.impl.ConstantNode;
import com.intellij.codeInspection.LocalInspectionToolSession;
import com.intellij.codeInspection.ProblemDescriptor;
import com.intellij.codeInspection.ProblemsHolder;
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.util.PsiUtilBase;
import org.intellij.erlang.psi.*;
import org.intellij.erlang.quickfixes.ErlangQuickFixBase;
import org.jetbrains.annotations.NotNull;
import static org.intellij.erlang.psi.impl.ErlangPsiImplUtil.*;
public class ErlangUnboundVariableInspection extends ErlangInspectionBase {
@NotNull
@Override
protected ErlangVisitor buildErlangVisitor(@NotNull final ProblemsHolder holder, @NotNull LocalInspectionToolSession session) {
return new ErlangVisitor() {
@Override
public void visitQVar(@NotNull ErlangQVar o) {
if (inArgumentDefinition(o) && !inArgumentList(o)
|| inDefinitionBeforeArgumentList(o)
|| inLeftPartOfAssignment(o) || inAtomAttribute(o) || isMacros(o)
|| isForceSkipped(o) || inSpecification(o) || inDefine(o)
|| inCallback(o) || inRecordDefinition(o)) {
return;
}
PsiReference reference = o.getReference();
if (reference != null && reference.resolve() == null) {
holder.registerProblem(o, "Variable " + "'" + o.getText() + "' is unbound", new ErlangIntroduceVariableQuickFix());
}
}
};
}
private static class ErlangIntroduceVariableQuickFix extends ErlangQuickFixBase {
@NotNull
@Override
public String getFamilyName() {
return "Introduce variable";
}
@Override
public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) {
PsiElement psiElement = descriptor.getPsiElement();
if (!(psiElement instanceof ErlangQVar)) return;
PsiElement anchor = psiElement;
while (anchor != null && !(anchor.getParent() instanceof ErlangClauseBody)) {
anchor = anchor.getParent();
}
if (anchor != null) {
PsiElement parent = anchor.getParent();
if (parent != null) {
Editor editor = PsiUtilBase.findEditor(anchor);
if (editor == null) return;
editor.getCaretModel().moveToOffset(anchor.getTextRange().getStartOffset());
TemplateManager manager = TemplateManager.getInstance(project);
Template template = manager.createTemplate("", "");
template.addTextSegment(((ErlangQVar) psiElement).getName());
template.addTextSegment(" = ");
template.addVariable(new ConstantNode("unbound"), true);
template.addTextSegment("");
template.addEndVariable();
template.addTextSegment(",\n");
manager.startTemplate(editor, template);
}
}
}
}
}