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/*
TikZiT - a GUI diagram editor for TikZ
Copyright (C) 2018 Aleks Kissinger
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "delimitedstringvalidator.h"
DelimitedStringValidator::DelimitedStringValidator(QObject *parent) : QValidator(parent)
{
}
QValidator::State DelimitedStringValidator::validate(QString &input, int &/*pos*/) const
{
int depth = braceDepth(input);
if (depth == 0) return Acceptable;
else if (depth > 0) return Intermediate;
else return Invalid;
}
void DelimitedStringValidator::fixup(QString &input) const
{
int depth = braceDepth(input);
if (depth > 0) input.append(QString("}").repeated(depth));
}
int DelimitedStringValidator::braceDepth(QString input) const
{
int depth = 0;
bool escape = false;
for (int i = 0; i < input.length(); ++i) {
QCharRef c = input[i];
if (escape) {
escape = false;
} else if (c == '\\') {
escape = true;
} else if (c == '{') {
depth++;
} else if (c == '}') {
depth--;
if (depth < 0) return -1;
}
}
return depth;
}
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