| /* |
| * Copyright 2000-2013 JetBrains s.r.o. |
| * |
| * 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 com.jetbrains.python.inspections; |
| |
| import com.intellij.codeInspection.LocalInspectionToolSession; |
| import com.intellij.codeInspection.ProblemsHolder; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiElementVisitor; |
| import com.intellij.psi.PsiWhiteSpace; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.intellij.util.containers.Stack; |
| import com.jetbrains.python.PyBundle; |
| import com.jetbrains.python.inspections.quickfix.RemoveUnnecessaryBackslashQuickFix; |
| import com.jetbrains.python.psi.*; |
| import org.jetbrains.annotations.Nls; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * User: catherine |
| * <p/> |
| * Inspection to highlight backslashes in places where line continuation is implicit (inside (), [], {}). |
| */ |
| public class PyUnnecessaryBackslashInspection extends PyInspection { |
| |
| @Nls |
| @NotNull |
| @Override |
| public String getDisplayName() { |
| return PyBundle.message("INSP.NAME.unnecessary.backslash"); |
| } |
| |
| @NotNull |
| @Override |
| public PsiElementVisitor buildVisitor(@NotNull ProblemsHolder holder, |
| boolean isOnTheFly, |
| @NotNull LocalInspectionToolSession session) { |
| return new Visitor(holder, session); |
| } |
| |
| public static class Visitor extends PyInspectionVisitor { |
| public Visitor(@Nullable ProblemsHolder holder, @NotNull LocalInspectionToolSession session) { |
| super(holder, session); |
| } |
| |
| @Override |
| public void visitPyParameterList(final PyParameterList list) { |
| findProblem(list); |
| } |
| |
| @Override |
| public void visitPyArgumentList(final PyArgumentList list) { |
| findProblem(list); |
| } |
| |
| @Override |
| public void visitPyTupleExpression(PyTupleExpression node) { |
| if (node.getParent() instanceof PyParenthesizedExpression) |
| findProblem(node); |
| } |
| |
| @Override |
| public void visitPyParenthesizedExpression(final PyParenthesizedExpression expression) { |
| final Stack<PsiElement> stack = new Stack<PsiElement>(); |
| stack.push(expression); |
| while (!stack.isEmpty()) { |
| PsiElement element = stack.pop(); |
| if (!(element instanceof PyTupleExpression)) { |
| findProblem(element); |
| if (element != null) { |
| for (PsiElement psiElement : element.getChildren()) { |
| stack.push(psiElement); |
| } |
| } |
| } |
| } |
| } |
| |
| @Override |
| public void visitPyDictLiteralExpression(final PyDictLiteralExpression expression) { |
| findProblem(expression); |
| } |
| |
| @Override |
| public void visitPyListLiteralExpression(final PyListLiteralExpression expression) { |
| findProblem(expression); |
| } |
| |
| @Override |
| public void visitPySetLiteralExpression(final PySetLiteralExpression expression) { |
| findProblem(expression); |
| } |
| |
| @Override |
| public void visitPyStringLiteralExpression(final PyStringLiteralExpression stringLiteralExpression) { |
| PsiElement parent = stringLiteralExpression.getParent(); |
| if (parent instanceof PyListLiteralExpression || parent instanceof PyParenthesizedExpression || |
| parent instanceof PySetLiteralExpression || parent instanceof PyKeyValueExpression || |
| parent instanceof PyNamedParameter || parent instanceof PyArgumentList) { |
| findProblem(stringLiteralExpression); |
| } |
| } |
| |
| private void findProblem(@Nullable final PsiElement expression) { |
| final PsiWhiteSpace[] children = PsiTreeUtil.getChildrenOfType(expression, PsiWhiteSpace.class); |
| if (children != null) { |
| for (PsiWhiteSpace ws : children) { |
| if (ws.getText().contains("\\")) { |
| registerProblem(ws, "Unnecessary backslash in expression.", new RemoveUnnecessaryBackslashQuickFix()); |
| } |
| } |
| } |
| } |
| |
| } |
| } |