diff options
author | Aleks Kissinger <aleks0@gmail.com> | 2019-01-02 17:12:37 +0100 |
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committer | Aleks Kissinger <aleks0@gmail.com> | 2019-01-02 17:12:37 +0100 |
commit | 0f68de6dcc601cfef295f2b0cb5245b631f75e37 (patch) | |
tree | 724e8a7a81b88aea35b3bcbc76b20698e30b2312 /src/data | |
parent | 50f56c81fcd68a54819302927fb93a54609107c0 (diff) |
created delimited string validator
Diffstat (limited to 'src/data')
-rw-r--r-- | src/data/delimitedstringvalidator.cpp | 58 | ||||
-rw-r--r-- | src/data/delimitedstringvalidator.h | 42 |
2 files changed, 100 insertions, 0 deletions
diff --git a/src/data/delimitedstringvalidator.cpp b/src/data/delimitedstringvalidator.cpp new file mode 100644 index 0000000..9f1057e --- /dev/null +++ b/src/data/delimitedstringvalidator.cpp @@ -0,0 +1,58 @@ +/* + 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; +} diff --git a/src/data/delimitedstringvalidator.h b/src/data/delimitedstringvalidator.h new file mode 100644 index 0000000..654e4ab --- /dev/null +++ b/src/data/delimitedstringvalidator.h @@ -0,0 +1,42 @@ +/* + 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. + */ + +#ifndef DELIMITEDSTRINGVALIDATOR_H +#define DELIMITEDSTRINGVALIDATOR_H + + +#include <QObject> +#include <QValidator> + + +class DelimitedStringValidator : public QValidator +{ +public: + DelimitedStringValidator(QObject *parent); + QValidator::State validate(QString &input, int &/*pos*/) const override; + void fixup(QString &input) const override; +private: + int braceDepth(QString input) const; +}; + +#endif // DELIMITEDSTRINGVALIDATOR_H |