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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 part of utils; | |
| 6 | |
| 7 class Path { | |
| 8 final String _path; | |
| 9 final bool isWindowsShare; | |
| 10 | |
| 11 Path(String source) | |
| 12 : _path = _clean(source), isWindowsShare = _isWindowsShare(source); | |
| 13 | |
| 14 Path.raw(String source) : _path = source, isWindowsShare = false; | |
| 15 | |
| 16 Path._internal(String this._path, bool this.isWindowsShare); | |
| 17 | |
| 18 static String _clean(String source) { | |
| 19 if (Platform.operatingSystem == 'windows') return _cleanWindows(source); | |
| 20 // Remove trailing slash from directories: | |
| 21 if (source.length > 1 && source.endsWith('/')) { | |
| 22 return source.substring(0, source.length - 1); | |
| 23 } | |
| 24 return source; | |
| 25 } | |
| 26 | |
| 27 static String _cleanWindows(String source) { | |
| 28 // Change \ to /. | |
| 29 var clean = source.replaceAll('\\', '/'); | |
| 30 // Add / before intial [Drive letter]: | |
| 31 if (clean.length >= 2 && clean[1] == ':') { | |
| 32 clean = '/$clean'; | |
| 33 } | |
| 34 if (_isWindowsShare(source)) { | |
| 35 return clean.substring(1, clean.length); | |
| 36 } | |
| 37 return clean; | |
| 38 } | |
| 39 | |
| 40 static bool _isWindowsShare(String source) { | |
| 41 return Platform.operatingSystem == 'windows' && source.startsWith('\\\\'); | |
| 42 } | |
| 43 | |
| 44 int get hashCode => _path.hashCode; | |
| 45 bool get isEmpty => _path.isEmpty; | |
| 46 bool get isAbsolute => _path.startsWith('/'); | |
| 47 bool get hasTrailingSeparator => _path.endsWith('/'); | |
| 48 | |
| 49 String toString() => _path; | |
| 50 | |
| 51 Path relativeTo(Path base) { | |
| 52 // Returns a path "relative" such that | |
| 53 // base.join(relative) == this.canonicalize. | |
| 54 // Throws exception if an impossible case is reached. | |
| 55 if (base.isAbsolute != isAbsolute || | |
| 56 base.isWindowsShare != isWindowsShare) { | |
| 57 throw new ArgumentError( | |
| 58 "Invalid case of Path.relativeTo(base):\n" | |
| 59 " Path and base must both be relative, or both absolute.\n" | |
| 60 " Arguments: $_path.relativeTo($base)"); | |
| 61 } | |
| 62 | |
| 63 var basePath = base.toString(); | |
| 64 // Handle drive letters specially on Windows. | |
| 65 if (base.isAbsolute && Platform.operatingSystem == 'windows') { | |
| 66 bool baseHasDrive = | |
| 67 basePath.length >= 4 && basePath[2] == ':' && basePath[3] == '/'; | |
| 68 bool pathHasDrive = | |
| 69 _path.length >= 4 && _path[2] == ':' && _path[3] == '/'; | |
| 70 if (baseHasDrive && pathHasDrive) { | |
| 71 int baseDrive = basePath.codeUnitAt(1) | 32; // Convert to uppercase. | |
| 72 if (baseDrive >= 'a'.codeUnitAt(0) && | |
| 73 baseDrive <= 'z'.codeUnitAt(0) && | |
| 74 baseDrive == (_path.codeUnitAt(1) | 32)) { | |
| 75 if(basePath[1] != _path[1]) { | |
| 76 // Replace the drive letter in basePath with that from _path. | |
| 77 basePath = '/${_path[1]}:/${basePath.substring(4)}'; | |
| 78 base = new Path(basePath); | |
| 79 } | |
| 80 } else { | |
| 81 throw new ArgumentError( | |
| 82 "Invalid case of Path.relativeTo(base):\n" | |
| 83 " Base path and target path are on different Windows drives.\n" | |
| 84 " Arguments: $_path.relativeTo($base)"); | |
| 85 } | |
| 86 } else if (baseHasDrive != pathHasDrive) { | |
| 87 throw new ArgumentError( | |
| 88 "Invalid case of Path.relativeTo(base):\n" | |
| 89 " Base path must start with a drive letter if and " | |
| 90 "only if target path does.\n" | |
| 91 " Arguments: $_path.relativeTo($base)"); | |
| 92 } | |
| 93 | |
| 94 } | |
| 95 if (_path.startsWith(basePath)) { | |
| 96 if (_path == basePath) return new Path('.'); | |
| 97 // There must be a '/' at the end of the match, or immediately after. | |
| 98 int matchEnd = basePath.length; | |
| 99 if (_path[matchEnd - 1] == '/' || _path[matchEnd] == '/') { | |
| 100 // Drop any extra '/' characters at matchEnd | |
| 101 while (matchEnd < _path.length && _path[matchEnd] == '/') { | |
| 102 matchEnd++; | |
| 103 } | |
| 104 return new Path(_path.substring(matchEnd)).canonicalize(); | |
| 105 } | |
| 106 } | |
| 107 | |
| 108 List<String> baseSegments = base.canonicalize().segments(); | |
| 109 List<String> pathSegments = canonicalize().segments(); | |
| 110 if (baseSegments.length == 1 && baseSegments[0] == '.') { | |
| 111 baseSegments = []; | |
| 112 } | |
| 113 if (pathSegments.length == 1 && pathSegments[0] == '.') { | |
| 114 pathSegments = []; | |
| 115 } | |
| 116 int common = 0; | |
| 117 int length = min(pathSegments.length, baseSegments.length); | |
| 118 while (common < length && pathSegments[common] == baseSegments[common]) { | |
| 119 common++; | |
| 120 } | |
| 121 final segments = new List<String>(); | |
| 122 | |
| 123 if (common < baseSegments.length && baseSegments[common] == '..') { | |
| 124 throw new ArgumentError( | |
| 125 "Invalid case of Path.relativeTo(base):\n" | |
| 126 " Base path has more '..'s than path does.\n" | |
| 127 " Arguments: $_path.relativeTo($base)"); | |
| 128 } | |
| 129 for (int i = common; i < baseSegments.length; i++) { | |
| 130 segments.add('..'); | |
| 131 } | |
| 132 for (int i = common; i < pathSegments.length; i++) { | |
| 133 segments.add('${pathSegments[i]}'); | |
| 134 } | |
| 135 if (segments.isEmpty) { | |
| 136 segments.add('.'); | |
| 137 } | |
| 138 if (hasTrailingSeparator) { | |
| 139 segments.add(''); | |
| 140 } | |
| 141 return new Path(segments.join('/')); | |
| 142 } | |
| 143 | |
| 144 | |
| 145 Path join(Path further) { | |
| 146 if (further.isAbsolute) { | |
| 147 throw new ArgumentError( | |
| 148 "Path.join called with absolute Path as argument."); | |
| 149 } | |
| 150 if (isEmpty) { | |
| 151 return further.canonicalize(); | |
| 152 } | |
| 153 if (hasTrailingSeparator) { | |
| 154 var joined = new Path._internal('$_path${further}', isWindowsShare); | |
| 155 return joined.canonicalize(); | |
| 156 } | |
| 157 var joined = new Path._internal('$_path/${further}', isWindowsShare); | |
| 158 return joined.canonicalize(); | |
| 159 } | |
| 160 | |
| 161 // Note: The URI RFC names for canonicalize, join, and relativeTo | |
| 162 // are normalize, resolve, and relativize. But resolve and relativize | |
| 163 // drop the last segment of the base path (the filename), on URIs. | |
| 164 Path canonicalize() { | |
| 165 if (isCanonical) return this; | |
| 166 return makeCanonical(); | |
| 167 } | |
| 168 | |
| 169 bool get isCanonical { | |
| 170 // Contains no consecutive path separators. | |
| 171 // Contains no segments that are '.'. | |
| 172 // Absolute paths have no segments that are '..'. | |
| 173 // All '..' segments of a relative path are at the beginning. | |
| 174 if (isEmpty) return false; // The canonical form of '' is '.'. | |
| 175 if (_path == '.') return true; | |
| 176 List segs = _path.split('/'); // Don't mask the getter 'segments'. | |
| 177 if (segs[0] == '') { // Absolute path | |
| 178 segs[0] = null; // Faster than removeRange(). | |
| 179 } else { // A canonical relative path may start with .. segments. | |
| 180 for (int pos = 0; | |
| 181 pos < segs.length && segs[pos] == '..'; | |
| 182 ++pos) { | |
| 183 segs[pos] = null; | |
| 184 } | |
| 185 } | |
| 186 if (segs.last == '') segs.removeLast(); // Path ends with /. | |
| 187 // No remaining segments can be ., .., or empty. | |
| 188 return !segs.any((s) => s == '' || s == '.' || s == '..'); | |
| 189 } | |
| 190 | |
| 191 Path makeCanonical() { | |
| 192 bool isAbs = isAbsolute; | |
| 193 List segs = segments(); | |
| 194 String drive; | |
| 195 if (isAbs && | |
| 196 !segs.isEmpty && | |
| 197 segs[0].length == 2 && | |
| 198 segs[0][1] == ':') { | |
| 199 drive = segs[0]; | |
| 200 segs.removeRange(0, 1); | |
| 201 } | |
| 202 List newSegs = []; | |
| 203 for (String segment in segs) { | |
| 204 switch (segment) { | |
| 205 case '..': | |
| 206 // Absolute paths drop leading .. markers, including after a drive. | |
| 207 if (newSegs.isEmpty) { | |
| 208 if (isAbs) { | |
| 209 // Do nothing: drop the segment. | |
| 210 } else { | |
| 211 newSegs.add('..'); | |
| 212 } | |
| 213 } else if (newSegs.last == '..') { | |
| 214 newSegs.add('..'); | |
| 215 } else { | |
| 216 newSegs.removeLast(); | |
| 217 } | |
| 218 break; | |
| 219 case '.': | |
| 220 case '': | |
| 221 // Do nothing - drop the segment. | |
| 222 break; | |
| 223 default: | |
| 224 newSegs.add(segment); | |
| 225 break; | |
| 226 } | |
| 227 } | |
| 228 | |
| 229 List segmentsToJoin = []; | |
| 230 if (isAbs) { | |
| 231 segmentsToJoin.add(''); | |
| 232 if (drive != null) { | |
| 233 segmentsToJoin.add(drive); | |
| 234 } | |
| 235 } | |
| 236 | |
| 237 if (newSegs.isEmpty) { | |
| 238 if (isAbs) { | |
| 239 segmentsToJoin.add(''); | |
| 240 } else { | |
| 241 segmentsToJoin.add('.'); | |
| 242 } | |
| 243 } else { | |
| 244 segmentsToJoin.addAll(newSegs); | |
| 245 if (hasTrailingSeparator) { | |
| 246 segmentsToJoin.add(''); | |
| 247 } | |
| 248 } | |
| 249 return new Path._internal(segmentsToJoin.join('/'), isWindowsShare); | |
| 250 } | |
| 251 | |
| 252 String toNativePath() { | |
| 253 if (isEmpty) return '.'; | |
| 254 if (Platform.operatingSystem == 'windows') { | |
| 255 String nativePath = _path; | |
| 256 // Drop '/' before a drive letter. | |
| 257 if (nativePath.length >= 3 && | |
| 258 nativePath.startsWith('/') && | |
| 259 nativePath[2] == ':') { | |
| 260 nativePath = nativePath.substring(1); | |
| 261 } | |
| 262 nativePath = nativePath.replaceAll('/', '\\'); | |
| 263 if (isWindowsShare) { | |
| 264 return '\\$nativePath'; | |
| 265 } | |
| 266 return nativePath; | |
| 267 } | |
| 268 return _path; | |
| 269 } | |
| 270 | |
| 271 List<String> segments() { | |
| 272 List result = _path.split('/'); | |
| 273 if (isAbsolute) result.removeRange(0, 1); | |
| 274 if (hasTrailingSeparator) result.removeLast(); | |
| 275 return result; | |
| 276 } | |
| 277 | |
| 278 Path append(String finalSegment) { | |
| 279 if (isEmpty) { | |
| 280 return new Path._internal(finalSegment, isWindowsShare); | |
| 281 } else if (hasTrailingSeparator) { | |
| 282 return new Path._internal('$_path$finalSegment', isWindowsShare); | |
| 283 } else { | |
| 284 return new Path._internal('$_path/$finalSegment', isWindowsShare); | |
| 285 } | |
| 286 } | |
| 287 | |
| 288 String get filenameWithoutExtension { | |
| 289 var name = filename; | |
| 290 if (name == '.' || name == '..') return name; | |
| 291 int pos = name.lastIndexOf('.'); | |
| 292 return (pos < 0) ? name : name.substring(0, pos); | |
| 293 } | |
| 294 | |
| 295 String get extension { | |
| 296 var name = filename; | |
| 297 int pos = name.lastIndexOf('.'); | |
| 298 return (pos < 0) ? '' : name.substring(pos + 1); | |
| 299 } | |
| 300 | |
| 301 Path get directoryPath { | |
| 302 int pos = _path.lastIndexOf('/'); | |
| 303 if (pos < 0) return new Path(''); | |
| 304 while (pos > 0 && _path[pos - 1] == '/') --pos; | |
| 305 var dirPath = (pos > 0) ? _path.substring(0, pos) : '/'; | |
| 306 return new Path._internal(dirPath, isWindowsShare); | |
| 307 } | |
| 308 | |
| 309 String get filename { | |
| 310 int pos = _path.lastIndexOf('/'); | |
| 311 return _path.substring(pos + 1); | |
| 312 } | |
| 313 } | |
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Chromium Code Reviews
Issue 748773004:
tools/testing: move code into individual libraries (Closed)
Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart