/*************************************************************************
Return the index of the first character of the word at 'idx'.
*************************************************************************/
String32::size_type TextUtils::getWordStartIdx(const String32& str, String32::size_type idx)
{
String32 temp = str.substr(0, idx);
trimTrailingChars(temp, DefaultWhitespace);
if (temp.length() <= 1) {
return 0;
}
// identify the type of character at 'pos'
if (String32::npos != DefaultAlphanumerical.find(temp[temp.length() - 1]))
{
idx = temp.find_last_not_of(DefaultAlphanumerical);
}
// since whitespace was stripped, character must be a symbol
else
{
idx = temp.find_last_of(DefaultAlphanumerical + DefaultWhitespace);
}
// make sure we do not go past end of string (+1)
if (idx == String32::npos)
{
return 0;
}
else
{
return idx + 1;
}
}
/*************************************************************************
Trim all characters from the set specified in \a chars from the end
of 'str'.
*************************************************************************/
void TextUtils::trimTrailingChars(String32& str, const String32& chars)
{
String32::size_type idx = str.find_last_not_of(chars);
if (idx != String32::npos)
{
str.resize(idx + 1);
}
else
{
str.erase();
}
}