FileDialogProvider.cpp

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// Copyright 2015 - 2026, GIBIS-UNIFESP and the wiRedPanda contributors
// SPDX-License-Identifier: GPL-3.0-or-later
 
#include "App/UI/FileDialogProvider.h"
 
#include <QFileDialog>
 
// ---------------------------------------------------------------------------
// Global state
// ---------------------------------------------------------------------------
 
static RealFileDialogProvider s_realProvider;
static FileDialogProvider *s_provider = &s_realProvider;
 
FileDialogProvider *FileDialogs::provider()
{
    return s_provider;
}
 
FileDialogProvider *FileDialogs::setProvider(FileDialogProvider *newProvider)
{
    auto *old = s_provider;
    s_provider = newProvider ? newProvider : &s_realProvider;
    return old;
}
 
// ---------------------------------------------------------------------------
// RealFileDialogProvider
// ---------------------------------------------------------------------------
 
QString RealFileDialogProvider::getOpenFileName(
    QWidget *parent, const QString &caption,
    const QString &dir, const QString &filter)
{
    return QFileDialog::getOpenFileName(parent, caption, dir, filter);
}
 
FileDialogResult RealFileDialogProvider::getSaveFileName(
    QWidget *parent, const QString &caption,
    const QString &dir, const QString &filter)
{
    QFileDialog dialog(parent, caption, dir, filter);
    dialog.setAcceptMode(QFileDialog::AcceptSave);
    dialog.setFileMode(QFileDialog::AnyFile);
 
    if (dialog.exec() == QDialog::Rejected) {
        return {};
    }
 
    const auto files = dialog.selectedFiles();
    if (files.isEmpty()) {
        // Unreachable via any real interaction with the dialog: QFileDialog::accept()
        // itself refuses to close (silently no-ops) when selectedFiles() would be empty,
        // confirmed empirically -- even force-enabling and clicking the accept button with
        // no filename selected leaves exec() blocked forever rather than returning Accepted.
        return {}; // LCOV_EXCL_LINE
    }
 
    return {files.constFirst(), dialog.selectedNameFilter()};
}