wxString RefactoringEngine::GetExpression(int pos, TextStatesPtr states)
{
bool cont(true);
int depth(0);
bool prevGt (false);
wxString expression;
states->SetPosition(pos);
while (cont && depth >= 0) {
wxChar ch = states->Previous();
// eof?
if (ch == 0) {
break;
}
switch (ch) {
case wxT(';'):
cont = false;
break;
case wxT('-'):
if (prevGt) {
prevGt = false;
//if previous char was '>', we found an arrow so reduce the depth
//which was increased
depth--;
} else {
if (depth <= 0) {
cont = false;
}
}
break;
case wxT(' '):
case wxT('\n'):
case wxT('\v'):
case wxT('\t'):
case wxT('\r'):
prevGt = false;
if (depth <= 0) {
cont = false;
}
break;
case wxT('{'):
case wxT('='):
prevGt = false;
cont = false;
break;
case wxT('('):
case wxT('['):
depth--;
prevGt = false;
if (depth < 0) {
//dont include this token
cont = false;
}
break;
case wxT(','):
case wxT('*'):
case wxT('&'):
case wxT('!'):
case wxT('~'):
case wxT('+'):
case wxT('^'):
case wxT('|'):
case wxT('%'):
case wxT('?'):
prevGt = false;
if (depth <= 0) {
//dont include this token
cont = false;
}
break;
case wxT('>'):
prevGt = true;
depth++;
break;
case wxT('<'):
prevGt = false;
depth--;
if (depth < 0) {
//dont include this token
cont = false;
}
break;
case wxT(')'):
case wxT(']'):
prevGt = false;
depth++;
break;
default:
prevGt = false;
break;
}
if(cont) {
expression.Prepend(ch);
}
}
return expression;
}
