util.h

/*
 
Pencil2D - Traditional Animation Software
Copyright (C) 2005-2007 Patrick Corrieri & Pascal Naidon
Copyright (C) 2012-2020 Matthew Chiawen Chang
 
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; version 2 of the License.
 
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.
 
*/
#ifndef UTIL_H
#define UTIL_H
 
#include <cstddef>
#include <functional>
#include <QtGlobal>
 
class QAbstractSpinBox;
class QLineF;
class QRect;
class QImage;
class QString;
 
QLineF clipLine(const QLineF& line, const QRect& clip, qreal t0, qreal t1);
 
void clearFocusOnFinished(QAbstractSpinBox *spinBox);
 
// NOTE: Replace this implementation with QScopeGuard once we drop support for Qt < 5.12
class ScopeGuard
{
public:
    explicit ScopeGuard(std::function< void() > onScopeExit) { m_onScopeExit = onScopeExit; }
    ScopeGuard(const ScopeGuard&) = delete;
    ~ScopeGuard() { if(m_invoke) { m_onScopeExit(); } }
 
    void dismiss() { m_invoke = false; };
private:
    std::function<void()> m_onScopeExit;
    bool m_invoke = true;
};
 
#define SCOPEGUARD_LINENAME_CAT(name, line) name##line
#define SCOPEGUARD_LINENAME(name, line) SCOPEGUARD_LINENAME_CAT(name, line)
 
#define OnScopeExit( callback ) ScopeGuard SCOPEGUARD_LINENAME( myScopeGuard, __LINE__ ) ( [&] { callback; } );
 
template <typename Container, typename Pred>
Container filter(const Container& container, Pred predicate) {
    Container result;
    for (const auto& item : container) {
        if (predicate(item)) {
            result.push_back(item);
        }
    }
    return result;
}
 
QString ffprobeLocation();
QString ffmpegLocation();
 
quint64 imageSize(const QImage&);
QString uniqueString(int len);
 
QString closestCanonicalPath(QString path);
QString validateDataPath(QString filePath, QString dataDirPath);
 
#endif // UTIL_H