| /* |
| * 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.psi.impl; |
| |
| import com.intellij.openapi.util.io.FileUtil; |
| import com.intellij.openapi.vfs.VirtualFile; |
| import com.jetbrains.python.PyNames; |
| import com.jetbrains.python.psi.PyCallExpression; |
| import com.jetbrains.python.psi.PyExpression; |
| import com.jetbrains.python.psi.PyReferenceExpression; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.io.File; |
| |
| /** |
| * @author yole |
| */ |
| public class PyPathEvaluator extends PyEvaluator { |
| |
| private final String myContainingFilePath; |
| |
| public PyPathEvaluator(String containingFilePath) { |
| myContainingFilePath = containingFilePath; |
| } |
| |
| @Nullable |
| public static String evaluatePath(PyExpression expr) { |
| if (expr == null) { |
| return null; |
| } |
| VirtualFile vFile = expr.getContainingFile().getVirtualFile(); |
| Object result = new PyPathEvaluator(vFile == null ? null : vFile.getPath()).evaluate(expr); |
| return result instanceof String ? (String) result : null; |
| } |
| |
| @Override |
| protected Object evaluateCall(PyCallExpression call) { |
| final PyExpression[] args = call.getArguments(); |
| if (call.isCalleeText(PyNames.DIRNAME) && args.length == 1) { |
| Object argValue = evaluate(args[0]); |
| return argValue instanceof String ? new File((String) argValue).getParent() : null; |
| } |
| else if (call.isCalleeText(PyNames.JOIN) && args.length >= 1) { |
| return evaluatePathInJoin(args, args.length); |
| } |
| else if (call.isCalleeText(PyNames.NORMPATH, PyNames.REALPATH) && args.length == 1) { |
| // we don't care about the exact transformation performed by python but need to preserve the availability of the path |
| return evaluate(args[0]); |
| } |
| else if (call.isCalleeText(PyNames.ABSPATH) && args.length == 1) { |
| Object argValue = evaluate(args[0]); |
| // relative to directory of 'containingFilePath', not file |
| if (!(argValue instanceof String)) { |
| return null; |
| } |
| if (FileUtil.isAbsolutePlatformIndependent((String)argValue)) { |
| return argValue; |
| } |
| else { |
| String path = new File(new File(myContainingFilePath).getParent(), (String)argValue).getPath(); |
| return path.replace("\\", "/"); |
| } |
| } |
| return super.evaluateCall(call); |
| } |
| |
| @Override |
| protected Object evaluateReferenceExpression(PyReferenceExpression expr) { |
| if (PyNames.PARDIR.equals(expr.getName())) { |
| return ".."; |
| } |
| else if (PyNames.CURDIR.equals(expr.getName())) { |
| return "."; |
| } |
| if (!expr.isQualified() && PyNames.FILE.equals(expr.getReferencedName())) { |
| return myContainingFilePath; |
| } |
| return super.evaluateReferenceExpression(expr); |
| } |
| |
| public String evaluatePathInJoin(PyExpression[] args, int endElement) { |
| String result = null; |
| for (int i = 0; i < endElement; i++) { |
| Object arg = evaluate(args[i]); |
| if (!(arg instanceof String)) { |
| return null; |
| } |
| if (result == null) { |
| result = (String)arg; |
| } |
| else { |
| result = new File(result, (String)arg).getPath().replace("\\", "/"); |
| } |
| } |
| return result; |
| } |
| } |