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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
#import <UIKit/UIKit.h>
#include <QtGui/qwindow.h>
#include <QtGui/private/qguiapplication_p.h>
#include <qpa/qplatformtheme.h>
#include <QtCore/private/qcore_mac_p.h>
#include "qiosglobal.h"
#include "quiview.h"
#include "qiosscreen.h"
#include "qiosmessagedialog.h"
using namespace Qt::StringLiterals;
QIOSMessageDialog::QIOSMessageDialog()
: m_alertController(nullptr)
{
}
QIOSMessageDialog::~QIOSMessageDialog()
{
hide();
}
inline QString QIOSMessageDialog::messageTextPlain()
{
// Concatenate text fragments, and remove HTML tags
const QSharedPointer<QMessageDialogOptions> &opt = options();
constexpr auto lineShift = "\n\n"_L1;
const QString &informativeText = opt->informativeText();
const QString &detailedText = opt->detailedText();
QString text = opt->text();
if (!informativeText.isEmpty())
text += lineShift + informativeText;
if (!detailedText.isEmpty())
text += lineShift + detailedText;
text.replace("<p>"_L1, "\n"_L1, Qt::CaseInsensitive);
text.remove(QRegularExpression(QStringLiteral("<[^>]*>")));
return text;
}
inline UIAlertAction *QIOSMessageDialog::createAction(
const QMessageDialogOptions::CustomButton &customButton)
{
const QString label = QPlatformTheme::removeMnemonics(customButton.label);
const UIAlertActionStyle style = UIAlertActionStyleDefault;
return [UIAlertAction actionWithTitle:label.toNSString() style:style handler:^(UIAlertAction *) {
hide();
emit clicked(static_cast<QPlatformDialogHelper::StandardButton>(customButton.id), customButton.role);
}];
}
inline UIAlertAction *QIOSMessageDialog::createAction(StandardButton button)
{
const StandardButton labelButton = button == NoButton ? Ok : button;
const QString &standardLabel = QGuiApplicationPrivate::platformTheme()->standardButtonText(labelButton);
const QString &label = QPlatformTheme::removeMnemonics(standardLabel);
UIAlertActionStyle style = UIAlertActionStyleDefault;
if (button == Cancel)
style = UIAlertActionStyleCancel;
else if (button == Discard)
style = UIAlertActionStyleDestructive;
return [UIAlertAction actionWithTitle:label.toNSString() style:style handler:^(UIAlertAction *) {
hide();
if (button == NoButton)
emit reject();
else
emit clicked(button, buttonRole(button));
}];
}
void QIOSMessageDialog::exec()
{
m_eventLoop.exec(QEventLoop::DialogExec);
}
bool QIOSMessageDialog::show(Qt::WindowFlags windowFlags, Qt::WindowModality windowModality, QWindow *parent)
{
Q_UNUSED(windowFlags);
if (m_alertController // Ensure that the dialog is not showing already
|| !options() // Some message dialogs don't have options (QErrorMessage)
|| windowModality == Qt::NonModal) // We can only do modal dialogs
return false;
if (!options()->checkBoxLabel().isNull())
return false; // Can't support
m_alertController = [[UIAlertController
alertControllerWithTitle:options()->windowTitle().toNSString()
message:messageTextPlain().toNSString()
preferredStyle:UIAlertControllerStyleAlert] retain];
const QVector<QMessageDialogOptions::CustomButton> customButtons = options()->customButtons();
for (const QMessageDialogOptions::CustomButton &button : customButtons) {
UIAlertAction *act = createAction(button);
[m_alertController addAction:act];
}
if (StandardButtons buttons = options()->standardButtons()) {
for (int i = FirstButton; i < LastButton; i<<=1) {
if (i & buttons)
[m_alertController addAction:createAction(StandardButton(i))];
}
} else if (customButtons.isEmpty()) {
// We need at least one button to allow the user close the dialog
[m_alertController addAction:createAction(NoButton)];
}
UIWindow *window = presentationWindow(parent);
if (!window)
return false;
if (window.hidden) {
// With a window hidden, an attempt to present view controller
// below fails with a warning, that a view "is not a part of
// any view hierarchy". The UIWindow is initially hidden,
// as unhiding it is what hides the splash screen.
window.hidden = NO;
}
[window.rootViewController presentViewController:m_alertController animated:YES completion:nil];
return true;
}
void QIOSMessageDialog::hide()
{
m_eventLoop.exit();
[m_alertController dismissViewControllerAnimated:YES completion:nil];
[m_alertController release];
m_alertController = nullptr;
}
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