int Parenthesis::collapseAtPos(const Parentheses &parentheses, QChar *character)
{
int result = -1;
QChar c;
int depth = 0;
for (int i = 0; i < parentheses.size(); ++i) {
const Parenthesis &p = parentheses.at(i);
if (p.chr == QLatin1Char('{')
|| p.chr == QLatin1Char('+')
|| p.chr == QLatin1Char('[')) {
if (depth == 0) {
result = p.pos;
c = p.chr;
}
++depth;
} else if (p.chr == QLatin1Char('}')
|| p.chr == QLatin1Char('-')
|| p.chr == QLatin1Char(']')) {
if (--depth < 0)
depth = 0;
result = -1;
}
}
if (result >= 0 && character)
*character = c;
return result;
}
int Parenthesis::closeCollapseAtPos(const Parentheses &parentheses, QChar *character)
{
int depth = 0;
for (int i = 0; i < parentheses.size(); ++i) {
const Parenthesis &p = parentheses.at(i);
if (p.chr == QLatin1Char('{')
|| p.chr == QLatin1Char('+')
|| p.chr == QLatin1Char('[')) {
++depth;
} else if (p.chr == QLatin1Char('}')
|| p.chr == QLatin1Char('-')
|| p.chr == QLatin1Char(']')) {
if (--depth < 0) {
if (character)
*character = p.chr;
return p.pos;
}
}
}
return -1;
}