| /* |
| * 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.PsiComment; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiElementVisitor; |
| import com.intellij.psi.PsiFile; |
| import com.jetbrains.python.PyBundle; |
| import com.jetbrains.python.PythonFileType; |
| import com.jetbrains.python.psi.PyFile; |
| import com.jetbrains.python.psi.PyStringLiteralExpression; |
| import org.jetbrains.annotations.Nls; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.nio.charset.Charset; |
| import java.nio.charset.IllegalCharsetNameException; |
| import java.nio.charset.UnsupportedCharsetException; |
| |
| import static com.jetbrains.python.psi.FutureFeature.UNICODE_LITERALS; |
| |
| /** |
| * @author Alexey.Ivanov |
| */ |
| public class PyByteLiteralInspection extends PyInspection { |
| @Nls |
| @NotNull |
| @Override |
| public String getDisplayName() { |
| return PyBundle.message("INSP.NAME.byte.literal"); |
| } |
| |
| @NotNull |
| @Override |
| public PsiElementVisitor buildVisitor(@NotNull ProblemsHolder holder, |
| boolean isOnTheFly, |
| @NotNull LocalInspectionToolSession session) { |
| return new Visitor(holder, session); |
| } |
| |
| private class Visitor extends PyInspectionVisitor { |
| public Visitor(@Nullable ProblemsHolder holder, @NotNull LocalInspectionToolSession session) { |
| super(holder, session); |
| } |
| |
| @Override |
| public void visitComment(PsiComment node) { |
| checkString(node, node.getText()); |
| } |
| |
| private void checkString(PsiElement node, String value) { |
| PsiFile file = node.getContainingFile(); // can't cache this in the instance, alas |
| if (file == null) return; |
| boolean default_bytes = false; |
| if (file instanceof PyFile) { |
| PyFile pyfile = (PyFile)file; |
| default_bytes = (!UNICODE_LITERALS.requiredAt(pyfile.getLanguageLevel()) && |
| !pyfile.hasImportFromFuture(UNICODE_LITERALS) |
| ); |
| } |
| |
| final String charsetString = PythonFileType.getCharsetFromEncodingDeclaration(file); |
| try { |
| if (charsetString != null && !Charset.forName(charsetString).equals(Charset.forName("US-ASCII"))) |
| default_bytes = false; |
| } catch (UnsupportedCharsetException exception) {} |
| catch (IllegalCharsetNameException e) {} |
| |
| boolean hasNonAscii = false; |
| |
| int length = value.length(); |
| char c = 0; |
| for (int i = 0; i < length; ++i) { |
| c = value.charAt(i); |
| if (((int) c) > 255) { |
| hasNonAscii = true; |
| break; |
| } |
| } |
| |
| char first_char = Character.toLowerCase(node.getText().charAt(0)); |
| boolean isByte = first_char == 'b' || (default_bytes && first_char != 'u'); |
| |
| if (hasNonAscii && isByte) { |
| registerProblem(node, "Byte literal contains characters > 255"); |
| } |
| } |
| |
| @Override |
| public void visitPyStringLiteralExpression(PyStringLiteralExpression node) { |
| checkString(node, node.getStringValue()); |
| } |
| } |
| } |