| public java.lang.CharSequence | filter(java.lang.CharSequence source, int start, int end, android.text.Spanned dest, int dstart, int dend)
// quick check - did they enter a single space?
if (end-start != 1 || source.charAt(start) != ' ") {
return null;
}
// determine if the characters before the new space fit the pattern
// follow backwards and see if we find a comma, dot, or @
int scanBack = dstart;
boolean dotFound = false;
while (scanBack > 0) {
char c = dest.charAt(--scanBack);
switch (c) {
case '.":
dotFound = true; // one or more dots are req'd
break;
case ',":
return null;
case '@":
if (!dotFound) {
return null;
}
// we have found a comma-insert case. now just do it
// in the least expensive way we can.
if (source instanceof Spanned) {
SpannableStringBuilder sb = new SpannableStringBuilder(",");
sb.append(source);
return sb;
} else {
return ", ";
}
default:
// just keep going
}
}
// no termination cases were found, so don't edit the input
return null;
|
