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Diffstat (limited to 'src/data/delimitedstringvalidator.h')
-rw-r--r-- | src/data/delimitedstringvalidator.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/src/data/delimitedstringvalidator.h b/src/data/delimitedstringvalidator.h new file mode 100644 index 0000000..60c2513 --- /dev/null +++ b/src/data/delimitedstringvalidator.h @@ -0,0 +1,57 @@ +/* + 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/>. +*/ + +/*! + * A string validator which keeps curly braces matched. Used in various places + * to ensure the user doesn't make non-parseable .tikz or .tikzstyles files. + * + * Its validation function will return Acceptable if all curly braces are matched + * properly, Intermediate if all braces are matched except for possibly some opening + * curly braces, and Invalid if there are unmatched closing curly braces. + */ + +#ifndef DELIMITEDSTRINGVALIDATOR_H +#define DELIMITEDSTRINGVALIDATOR_H + + +#include <QObject> +#include <QValidator> + + +class DelimitedStringValidator : public QValidator +{ + Q_OBJECT +public: + DelimitedStringValidator(QObject *parent); + QValidator::State validate(QString &input, int &/*pos*/) const override; + + /*! + * \brief fixup adds curly braces until all braces are matched (if possible) + * \param input + */ + void fixup(QString &input) const override; +private: + /*! + * \brief braceDepth computes the final (non-escaped) curly-brace depth of a given string + * \param input a string + * \return the final brace depth, or -1 if the depth *ever* drops below 0 + */ + int braceDepth(QString input) const; +}; + +#endif // DELIMITEDSTRINGVALIDATOR_H |