001    /*
002     * Copyright 2010-2015 JetBrains s.r.o.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.jetbrains.kotlin.utils;
018    
019    import com.intellij.openapi.util.SystemInfo;
020    import com.intellij.openapi.util.text.StringUtil;
021    import com.intellij.util.io.URLUtil;
022    import org.jetbrains.annotations.NotNull;
023    
024    import java.net.MalformedURLException;
025    import java.net.URL;
026    
027    /*
028     * This code is essentially copied from IntelliJ IDEA's VfsUtil, and slightly restructured
029     */
030    public class KotlinVfsUtil {
031        private static final String FILE = "file";
032        private static final String JAR = "jar";
033        private static final String PROTOCOL_DELIMITER = ":";
034    
035        @NotNull
036        public static String convertFromUrl(@NotNull URL url) throws MalformedURLException {
037            String protocol = url.getProtocol();
038            String path = url.getPath();
039            if (JAR.equals(protocol)) {
040                if (StringUtil.startsWithConcatenationOf(path, FILE, PROTOCOL_DELIMITER)) {
041                    URL subURL = new URL(path);
042                    path = subURL.getPath();
043                }
044                else {
045                    throw new MalformedURLException("Can't parse url: " + url.toExternalForm());
046                }
047            }
048            if (SystemInfo.isWindows || SystemInfo.isOS2) {
049                while (path.length() > 0 && path.charAt(0) == '/') {
050                    path = path.substring(1, path.length());
051                }
052            }
053    
054            path = URLUtil.unescapePercentSequences(path);
055            return protocol + "://" + path;
056        }
057    
058        private KotlinVfsUtil() {}
059    }