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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
// Qt-Security score:significant reason:default
#import <UIKit/UIKit.h>
#import <Photos/Photos.h>
#include <QtCore/qstandardpaths.h>
#include <QtGui/qwindow.h>
#include <QDebug>
#include <QtCore/private/qcore_mac_p.h>
#include "qiosglobal.h"
#include "qiosfiledialog.h"
#include "qiosintegration.h"
#include "qiosoptionalplugininterface.h"
#include "qiosdocumentpickercontroller.h"
#include <QtCore/qpointer.h>
using namespace Qt::StringLiterals;
QIOSFileDialog::QIOSFileDialog()
: m_viewController(nullptr)
{
// The photos picker can only communicate with the QPlatformFileDialogHelper
// API, as it lives in a separate plugin, so we tie into its signaling here
// to update our own state, and emit single file change.
connect(this, &QPlatformFileDialogHelper::filesSelected,
this, &QIOSFileDialog::selectedFilesChanged);
}
QIOSFileDialog::~QIOSFileDialog()
{
[m_viewController release];
}
void QIOSFileDialog::exec()
{
m_eventLoop.exec(QEventLoop::DialogExec);
}
bool QIOSFileDialog::show(Qt::WindowFlags windowFlags, Qt::WindowModality windowModality, QWindow *parent)
{
Q_UNUSED(windowFlags);
Q_UNUSED(windowModality);
const bool acceptOpen = options()->acceptMode() == QFileDialogOptions::AcceptOpen;
const auto initialDir = options()->initialDirectory();
const QString directory = initialDir.toLocalFile();
// We manually add assets-library:// to the list of paths,
// when converted to QUrl, it becames a scheme.
const QString scheme = initialDir.scheme();
if (acceptOpen && (directory.startsWith("assets-library:"_L1) || scheme == "assets-library"_L1))
return showImagePickerDialog(parent);
return showNativeDocumentPickerDialog(parent);
}
void QIOSFileDialog::showImagePickerDialog_helper(QWindow *parent)
{
UIWindow *window = presentationWindow(parent);
[window.rootViewController presentViewController:m_viewController animated:YES completion:nil];
}
bool QIOSFileDialog::showImagePickerDialog(QWindow *parent)
{
if (!m_viewController) {
QFactoryLoader *plugins = QIOSIntegration::instance()->optionalPlugins();
qsizetype size = QList<QPluginParsedMetaData>(plugins->metaData()).size();
for (qsizetype i = 0; i < size; ++i) {
QIosOptionalPluginInterface *plugin = qobject_cast<QIosOptionalPluginInterface *>(plugins->instance(i));
m_viewController = [plugin->createImagePickerController(this) retain];
if (m_viewController)
break;
}
}
if (!m_viewController) {
qWarning() << "QIOSFileDialog: Could not resolve Qt plugin that gives access to photos on iOS";
return false;
}
// "Old style" authorization (deprecated, but we have to work with AssetsLibrary anyway).
//
// From the documentation:
// "The authorizationStatus and requestAuthorization: methods aren’t compatible with the
// limited library and return PHAuthorizationStatusAuthorized when the user authorizes your
// app for limited access only."
//
// This is good enough for us.
const auto authStatus = [PHPhotoLibrary authorizationStatus];
if (authStatus == PHAuthorizationStatusAuthorized) {
showImagePickerDialog_helper(parent);
} else if (authStatus == PHAuthorizationStatusNotDetermined) {
QPointer<QWindow> winGuard(parent);
QPointer<QIOSFileDialog> thisGuard(this);
[PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
dispatch_async(dispatch_get_main_queue(), ^{
if (status == PHAuthorizationStatusAuthorized) {
if (thisGuard && (winGuard || !parent))
thisGuard->showImagePickerDialog_helper(winGuard);
} else if (thisGuard) {
emit thisGuard->reject();
}
});
}];
} else {
// Treat 'Limited' (we don't know how to deal with anyway) and 'Denied' as errors.
// FIXME: logging category?
qWarning() << "QIOSFileDialog: insufficient permission, cannot pick images";
return false;
}
return true;
}
bool QIOSFileDialog::showNativeDocumentPickerDialog(QWindow *parent)
{
#ifndef Q_OS_TVOS
m_viewController = [[QIOSDocumentPickerController alloc] initWithQIOSFileDialog:this];
UIWindow *window = presentationWindow(parent);
[window.rootViewController presentViewController:m_viewController animated:YES completion:nil];
return true;
#else
return false;
#endif
}
void QIOSFileDialog::hide()
{
// QFileDialog will remember the last directory set, and open subsequent dialogs in the same
// directory for convenience. This works for normal file dialogs, but not when using native
// pickers. Those can only be used for picking specific types, without support for normal file
// system navigation. To avoid showing a native picker by accident, we change directory back
// before we return. More could have been done to preserve the "last directory" logic here, but
// navigating the file system on iOS is not recommended in the first place, so we keep it simple.
emit directoryEntered(QUrl::fromLocalFile(QDir::currentPath()));
[m_viewController dismissViewControllerAnimated:YES completion:nil];
[m_viewController release];
m_viewController = nullptr;
m_eventLoop.exit();
}
QList<QUrl> QIOSFileDialog::selectedFiles() const
{
return m_selection;
}
void QIOSFileDialog::selectedFilesChanged(const QList<QUrl> &selection)
{
m_selection = selection;
if (m_selection.count() == 1)
emit fileSelected(m_selection[0]);
}