blob: 80024c2fb554aa2adec4310f292131415dea1142 [file] [log] [blame]
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
import "dart:convert" show ASCII;
// VM implementation of Uri.
typedef Uri _UriBaseClosure();
Uri _unsupportedUriBase() {
throw new UnsupportedError("'Uri.base' is not supported");
}
// _uriBaseClosure can be overwritten by the embedder to supply a different
// value for Uri.base.
_UriBaseClosure _uriBaseClosure = _unsupportedUriBase;
patch class Uri {
/* patch */ static Uri get base => _uriBaseClosure();
}
patch class _Uri {
static final bool _isWindowsCached = _isWindowsPlatform;
static bool get _isWindowsPlatform native "Uri_isWindowsPlatform";
/* patch */ static bool get _isWindows => _isWindowsCached;
/* patch */ static String _uriEncode(List<int> canonicalTable,
String text,
Encoding encoding,
bool spaceToPlus) {
// First check if the text will be changed by encoding.
int i = 0;
if (identical(encoding, UTF8) ||
identical(encoding, LATIN1) ||
identical(encoding, ASCII)) {
// Encoding is compatible with the original string.
// Find first character that needs encoding.
for (; i < text.length; i++) {
var char = text.codeUnitAt(i);
if (char >= 128 ||
canonicalTable[char >> 4] & (1 << (char & 0x0f)) == 0) {
break;
}
}
}
if (i == text.length) return text;
// Encode the string into bytes then generate an ASCII only string
// by percent encoding selected bytes.
StringBuffer result = new StringBuffer();
for (int j = 0; j < i; j++) {
result.writeCharCode(text.codeUnitAt(j));
}
// TODO(lrn): Is there a way to only encode from index i and forwards.
var bytes = encoding.encode(text);
for (; i < bytes.length; i++) {
int byte = bytes[i];
if (byte < 128 &&
((canonicalTable[byte >> 4] & (1 << (byte & 0x0f))) != 0)) {
result.writeCharCode(byte);
} else if (spaceToPlus && byte == _SPACE) {
result.writeCharCode(_PLUS);
} else {
const String hexDigits = '0123456789ABCDEF';
result..writeCharCode(_PERCENT)
..writeCharCode(hexDigits.codeUnitAt(byte >> 4))
..writeCharCode(hexDigits.codeUnitAt(byte & 0x0f));
}
}
return result.toString();
}
}