catch (SecurityException se) {
}
// return empty string if property value is empty string.
if (userDir.length() == 0)
return new URI("file", "", "", null, null);
// compute the new escaped value if the new property value doesn't
// match the previous one
if (gUserDirURI != null && userDir.equals(gUserDir)) {
return gUserDirURI;
}
// record the new value as the global property value
gUserDir = userDir;
char separator = java.io.File.separatorChar;
userDir = userDir.replace(separator, '/');
int len = userDir.length(), ch;
StringBuffer buffer = new StringBuffer(len*3);
// change C:/blah to /C:/blah
if (len >= 2 && userDir.charAt(1) == ':') {
ch = Character.toUpperCase(userDir.charAt(0));
if (ch >= 'A' && ch <= 'Z') {
buffer.append('/');
}
}
// for each character in the path
int i = 0;
for (; i < len; i++) {
ch = userDir.charAt(i);
// if it's not an ASCII character, break here, and use UTF-8 encoding
if (ch >= 128)
break;
if (gNeedEscaping[ch]) {
buffer.append('%');
buffer.append(gAfterEscaping1[ch]);
buffer.append(gAfterEscaping2[ch]);
// record the fact that it's escaped
}
else {
buffer.append((char)ch);
}
}
// we saw some non-ascii character
if (i < len) {
// get UTF-8 bytes for the remaining sub-string
byte[] bytes = null;
byte b;
try {
bytes = userDir.substring(i).getBytes("UTF-8");
} catch (java.io.UnsupportedEncodingException e) {
// should never happen
return new URI("file", "", userDir, null, null);
}
len = bytes.length;
// for each byte
for (i = 0; i < len; i++) {
b = bytes[i];
// for non-ascii character: make it positive, then escape
if (b < 0) {
ch = b + 256;
buffer.append('%');
buffer.append(gHexChs[ch >> 4]);
buffer.append(gHexChs[ch & 0xf]);
}
else if (gNeedEscaping[b]) {
buffer.append('%');
buffer.append(gAfterEscaping1[b]);
buffer.append(gAfterEscaping2[b]);
}
else {
buffer.append((char)b);
}
}
}
// change blah/blah to blah/blah/
if (!userDir.endsWith("/"))
buffer.append('/');
gUserDirURI = new URI("file", "", buffer.toString(), null, null);
return gUserDirURI;
}