JUCE/modules/juce_gui_basics/detail/juce_AlertWindowHelpers.h

/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited

   JUCE is an open source library subject to commercial or open-source
   licensing.

   By using JUCE, you agree to the terms of both the JUCE 7 End-User License
   Agreement and JUCE Privacy Policy.

   End User License Agreement: www.juce.com/juce-7-licence
   Privacy Policy: www.juce.com/juce-privacy-policy

   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

namespace juce::detail
{

struct AlertWindowHelpers
{
    AlertWindowHelpers() = delete;

    static std::unique_ptr<ScopedMessageBoxInterface> create (const MessageBoxOptions& opts)
    {
        class AlertWindowImpl : public detail::ScopedMessageBoxInterface
        {
        public:
            explicit AlertWindowImpl (const MessageBoxOptions& opts) : options (opts) {}

            void runAsync (std::function<void (int)> recipient) override
            {
                if (auto* comp = setUpAlert())
                    comp->enterModalState (true, ModalCallbackFunction::create (std::move (recipient)), true);
                else
                    NullCheckedInvocation::invoke (recipient, 0);
            }

            int runSync() override
            {
               #if JUCE_MODAL_LOOPS_PERMITTED
                if (auto comp = rawToUniquePtr (setUpAlert()))
                    return comp->runModalLoop();
               #endif

                jassertfalse;
                return 0;
            }

            void close() override
            {
                if (alert != nullptr)
                    if (alert->isCurrentlyModal())
                        alert->exitModalState();

                alert = nullptr;
            }

        private:
            Component* setUpAlert()
            {
                auto* component = options.getAssociatedComponent();

                auto& lf = component != nullptr ? component->getLookAndFeel()
                                                : LookAndFeel::getDefaultLookAndFeel();

                alert = lf.createAlertWindow (options.getTitle(),
                                              options.getMessage(),
                                              options.getButtonText (0),
                                              options.getButtonText (1),
                                              options.getButtonText (2),
                                              options.getIconType(),
                                              options.getNumButtons(),
                                              component);

                if (alert == nullptr)
                {
                    // You have to return an alert box!
                    jassertfalse;
                    return nullptr;
                }

                if (auto* parent = options.getParentComponent())
                {
                    parent->addAndMakeVisible (alert);

                    if (options.getAssociatedComponent() == nullptr)
                        alert->setCentrePosition (parent->getLocalBounds().getCentre());
                }

                alert->setAlwaysOnTop (WindowUtils::areThereAnyAlwaysOnTopWindows());

                return alert;
            }

            const MessageBoxOptions options;
            Component::SafePointer<AlertWindow> alert;

            JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AlertWindowImpl)
        };

        return std::make_unique<AlertWindowImpl> (opts);
    }
};

} // namespace juce::detail