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

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2020 - Raw Material Software Limited

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

   For this technical preview, this file is not subject to commercial licensing.

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

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

//==============================================================================
#if defined (MAC_OS_X_VERSION_10_8) && (MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_8) \
  && USE_COREGRAPHICS_RENDERING && JUCE_COREGRAPHICS_DRAW_ASYNC
static const juce::Identifier disableAsyncLayerBackedViewIdentifier { "disableAsyncLayerBackedView" };

void setComponentAsyncLayerBackedViewDisabled (juce::Component& comp, bool shouldDisableAsyncLayerBackedView)
{
    comp.getProperties().set (disableAsyncLayerBackedViewIdentifier, shouldDisableAsyncLayerBackedView);
}

bool getComponentAsyncLayerBackedViewDisabled (juce::Component& comp)
{
    return comp.getProperties()[disableAsyncLayerBackedViewIdentifier];
}
#endif

//==============================================================================
namespace juce
{
    typedef void (*AppFocusChangeCallback)();
    extern AppFocusChangeCallback appFocusChangeCallback;
    typedef bool (*CheckEventBlockedByModalComps) (NSEvent*);
    extern CheckEventBlockedByModalComps isEventBlockedByModalComps;
}

namespace juce
{

//==============================================================================
static CGFloat getMainScreenHeight() noexcept
{
    if ([[NSScreen screens] count] == 0)
        return 0.0f;

    return [[[NSScreen screens] objectAtIndex: 0] frame].size.height;
}

static void flipScreenRect (NSRect& r) noexcept
{
    r.origin.y = getMainScreenHeight() - (r.origin.y + r.size.height);
}

static NSRect flippedScreenRect (NSRect r) noexcept
{
    flipScreenRect (r);
    return r;
}

//==============================================================================
class NSViewComponentPeer  : public ComponentPeer,
                             private Timer
{
public:
    NSViewComponentPeer (Component& comp, const int windowStyleFlags, NSView* viewToAttachTo)
        : ComponentPeer (comp, windowStyleFlags),
          safeComponent (&comp),
          isSharedWindow (viewToAttachTo != nil),
          lastRepaintTime (Time::getMillisecondCounter())
    {
        appFocusChangeCallback = appFocusChanged;
        isEventBlockedByModalComps = checkEventBlockedByModalComps;

        auto r = makeNSRect (component.getLocalBounds());

        view = [createViewInstance() initWithFrame: r];
        setOwner (view, this);

        [view registerForDraggedTypes: getSupportedDragTypes()];

        notificationCenter = [NSNotificationCenter defaultCenter];

        [notificationCenter  addObserver: view
                                selector: @selector (frameChanged:)
                                    name: NSViewFrameDidChangeNotification
                                  object: view];

        [view setPostsFrameChangedNotifications: YES];

       #if defined (MAC_OS_X_VERSION_10_8) && (MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_8) \
        && USE_COREGRAPHICS_RENDERING && JUCE_COREGRAPHICS_DRAW_ASYNC
        if (! getComponentAsyncLayerBackedViewDisabled (component))
        {
            [view setWantsLayer: YES];
            [[view layer] setDrawsAsynchronously: YES];
        }
       #endif

        if (isSharedWindow)
        {
            window = [viewToAttachTo window];
            [viewToAttachTo addSubview: view];
        }
        else
        {
            r.origin.x = (CGFloat) component.getX();
            r.origin.y = (CGFloat) component.getY();
            flipScreenRect (r);

            window = [createWindowInstance() initWithContentRect: r
                                                       styleMask: getNSWindowStyleMask (windowStyleFlags)
                                                         backing: NSBackingStoreBuffered
                                                           defer: YES];
            setOwner (window, this);
            [window orderOut: nil];
            [window setDelegate: (id<NSWindowDelegate>) window];

            [window setOpaque: component.isOpaque()];

            if (! [window isOpaque])
                [window setBackgroundColor: [NSColor clearColor]];

           #if defined (MAC_OS_X_VERSION_10_9) && (MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_9)
            [view setAppearance: [NSAppearance appearanceNamed: NSAppearanceNameAqua]];
           #endif

            [window setHasShadow: ((windowStyleFlags & windowHasDropShadow) != 0)];

            if (component.isAlwaysOnTop())
                setAlwaysOnTop (true);

            [window setContentView: view];
            [window setAcceptsMouseMovedEvents: YES];

            // We'll both retain and also release this on closing because plugin hosts can unexpectedly
            // close the window for us, and also tend to get cause trouble if setReleasedWhenClosed is NO.
            [window setReleasedWhenClosed: YES];
            [window retain];

            [window setExcludedFromWindowsMenu: (windowStyleFlags & windowIsTemporary) != 0];
            [window setIgnoresMouseEvents: (windowStyleFlags & windowIgnoresMouseClicks) != 0];

            if ((windowStyleFlags & (windowHasMaximiseButton | windowHasTitleBar)) == (windowHasMaximiseButton | windowHasTitleBar))
                [window setCollectionBehavior: NSWindowCollectionBehaviorFullScreenPrimary];

            if ([window respondsToSelector: @selector (setRestorable:)])
                [window setRestorable: NO];

           #if defined (MAC_OS_X_VERSION_10_13) && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_13)
            if ([window respondsToSelector: @selector (setTabbingMode:)])
                [window setTabbingMode: NSWindowTabbingModeDisallowed];
           #endif

            [notificationCenter  addObserver: view
                                    selector: @selector (frameChanged:)
                                        name: NSWindowDidMoveNotification
                                      object: window];

            [notificationCenter  addObserver: view
                                    selector: @selector (frameChanged:)
                                        name: NSWindowDidMiniaturizeNotification
                                      object: window];

            [notificationCenter  addObserver: view
                                    selector: @selector (windowWillMiniaturize:)
                                        name: NSWindowWillMiniaturizeNotification
                                      object: window];

            [notificationCenter  addObserver: view
                                    selector: @selector (windowDidDeminiaturize:)
                                        name: NSWindowDidDeminiaturizeNotification
                                      object: window];
        }

        auto alpha = component.getAlpha();

        if (alpha < 1.0f)
            setAlpha (alpha);

        setTitle (component.getName());

        getNativeRealtimeModifiers = []
        {
            if ([NSEvent respondsToSelector: @selector (modifierFlags)])
                NSViewComponentPeer::updateModifiers ([NSEvent modifierFlags]);

            return ModifierKeys::currentModifiers;
        };
    }

    ~NSViewComponentPeer() override
    {
        [notificationCenter removeObserver: view];
        setOwner (view, nullptr);

        if ([view superview] != nil)
        {
            redirectWillMoveToWindow (nullptr);
            [view removeFromSuperview];
        }

        if (! isSharedWindow)
        {
            setOwner (window, nullptr);
            [window setContentView: nil];
            [window close];
            [window release];
        }

        [view release];
    }

    //==============================================================================
    void* getNativeHandle() const override    { return view; }

    void setVisible (bool shouldBeVisible) override
    {
        if (isSharedWindow)
        {
            if (shouldBeVisible)
                [view setHidden: false];
            else if ([window firstResponder] != view || ([window firstResponder] == view && [window makeFirstResponder: nil]))
                [view setHidden: true];
        }
        else
        {
            if (shouldBeVisible)
            {
                ++insideToFrontCall;
                [window orderFront: nil];
                --insideToFrontCall;
                handleBroughtToFront();
            }
            else
            {
                [window orderOut: nil];
            }
        }
    }

    void setTitle (const String& title) override
    {
        JUCE_AUTORELEASEPOOL
        {
            if (! isSharedWindow)
                [window setTitle: juceStringToNS (title)];
        }
    }

    bool setDocumentEditedStatus (bool edited) override
    {
        if (! hasNativeTitleBar())
            return false;

        [window setDocumentEdited: edited];
        return true;
    }

    void setRepresentedFile (const File& file) override
    {
        if (! isSharedWindow)
        {
            [window setRepresentedFilename: juceStringToNS (file != File()
                                                                ? file.getFullPathName()
                                                                : String())];

            windowRepresentsFile = (file != File());
        }
    }

    void setBounds (const Rectangle<int>& newBounds, bool isNowFullScreen) override
    {
        fullScreen = isNowFullScreen;

        auto r = makeNSRect (newBounds);
        auto oldViewSize = [view frame].size;

        if (isSharedWindow)
        {
            r.origin.y = [[view superview] frame].size.height - (r.origin.y + r.size.height);
            [view setFrame: r];
        }
        else
        {
            // Repaint behaviour of setFrame seemed to change in 10.11, and the drawing became synchronous,
            // causing performance issues. But sending an async update causes flickering in older versions,
            // hence this version check to use the old behaviour on pre 10.11 machines
            static bool isPre10_11 = SystemStats::getOperatingSystemType() <= SystemStats::MacOSX_10_10;

            [window setFrame: [window frameRectForContentRect: flippedScreenRect (r)]
                     display: isPre10_11];
        }

        if (oldViewSize.width != r.size.width || oldViewSize.height != r.size.height)
            [view setNeedsDisplay: true];
    }

    Rectangle<int> getBounds (const bool global) const
    {
        auto r = [view frame];
        NSWindow* viewWindow = [view window];

        if (global && viewWindow != nil)
        {
            r = [[view superview] convertRect: r toView: nil];
            r = [viewWindow convertRectToScreen: r];

            flipScreenRect (r);
        }
        else
        {
            r.origin.y = [[view superview] frame].size.height - r.origin.y - r.size.height;
        }

        return convertToRectInt (r);
    }

    Rectangle<int> getBounds() const override
    {
        return getBounds (! isSharedWindow);
    }

    Point<float> localToGlobal (Point<float> relativePosition) override
    {
        return relativePosition + getBounds (true).getPosition().toFloat();
    }

    using ComponentPeer::localToGlobal;

    Point<float> globalToLocal (Point<float> screenPosition) override
    {
        return screenPosition - getBounds (true).getPosition().toFloat();
    }

    using ComponentPeer::globalToLocal;

    void setAlpha (float newAlpha) override
    {
        if (isSharedWindow)
            [view setAlphaValue: (CGFloat) newAlpha];
        else
            [window setAlphaValue: (CGFloat) newAlpha];
    }

    void setMinimised (bool shouldBeMinimised) override
    {
        if (! isSharedWindow)
        {
            if (shouldBeMinimised)
                [window miniaturize: nil];
            else
                [window deminiaturize: nil];
        }
    }

    bool isMinimised() const override
    {
        return [window isMiniaturized];
    }

    void setFullScreen (bool shouldBeFullScreen) override
    {
        if (! isSharedWindow)
        {
            auto r = lastNonFullscreenBounds;

            if (isMinimised())
                setMinimised (false);

            if (fullScreen != shouldBeFullScreen)
            {
                if (shouldBeFullScreen && hasNativeTitleBar())
                {
                    fullScreen = true;
                    [window performZoom: nil];
                }
                else
                {
                    if (shouldBeFullScreen)
                        r = component.getParentMonitorArea();

                    // (can't call the component's setBounds method because that'll reset our fullscreen flag)
                    if (r != component.getBounds() && ! r.isEmpty())
                        setBounds (ScalingHelpers::scaledScreenPosToUnscaled (component, r), shouldBeFullScreen);
                }
            }
        }
    }

    bool isFullScreen() const override
    {
        return fullScreen;
    }

    bool isKioskMode() const override
    {
        return isWindowInKioskMode || ComponentPeer::isKioskMode();
    }

    static bool isWindowAtPoint (NSWindow* w, NSPoint screenPoint)
    {
        if ([NSWindow respondsToSelector: @selector (windowNumberAtPoint:belowWindowWithWindowNumber:)])
            return [NSWindow windowNumberAtPoint: screenPoint belowWindowWithWindowNumber: 0] == [w windowNumber];

        return true;
    }

    bool contains (Point<int> localPos, bool trueIfInAChildWindow) const override
    {
        NSRect viewFrame = [view frame];

        if (! (isPositiveAndBelow (localPos.getX(), viewFrame.size.width)
             && isPositiveAndBelow (localPos.getY(), viewFrame.size.height)))
            return false;

        if (! SystemStats::isRunningInAppExtensionSandbox())
        {
            if (NSWindow* const viewWindow = [view window])
            {
                NSRect windowFrame = [viewWindow frame];
                NSPoint windowPoint = [view convertPoint: NSMakePoint (localPos.x, viewFrame.size.height - localPos.y) toView: nil];
                NSPoint screenPoint = NSMakePoint (windowFrame.origin.x + windowPoint.x,
                                                   windowFrame.origin.y + windowPoint.y);

                if (! isWindowAtPoint (viewWindow, screenPoint))
                    return false;

            }
        }

        NSView* v = [view hitTest: NSMakePoint (viewFrame.origin.x + localPos.getX(),
                                                viewFrame.origin.y + viewFrame.size.height - localPos.getY())];

        return trueIfInAChildWindow ? (v != nil)
                                    : (v == view);
    }

    BorderSize<int> getFrameSize() const override
    {
        BorderSize<int> b;

        if (! isSharedWindow)
        {
            NSRect v = [view convertRect: [view frame] toView: nil];
            NSRect w = [window frame];

            b.setTop ((int) (w.size.height - (v.origin.y + v.size.height)));
            b.setBottom ((int) v.origin.y);
            b.setLeft ((int) v.origin.x);
            b.setRight ((int) (w.size.width - (v.origin.x + v.size.width)));
        }

        return b;
    }

    void updateFullscreenStatus()
    {
        if (hasNativeTitleBar())
        {
            isWindowInKioskMode = (([window styleMask] & NSWindowStyleMaskFullScreen) != 0);

            auto screen = getFrameSize().subtractedFrom (component.getParentMonitorArea());

            fullScreen = component.getScreenBounds().expanded (2, 2).contains (screen);
        }
        else
        {
            isWindowInKioskMode = false;
        }
    }

    bool hasNativeTitleBar() const
    {
        return (getStyleFlags() & windowHasTitleBar) != 0;
    }

    bool setAlwaysOnTop (bool alwaysOnTop) override
    {
        if (! isSharedWindow)
        {
            [window setLevel: alwaysOnTop ? ((getStyleFlags() & windowIsTemporary) != 0 ? NSPopUpMenuWindowLevel
                                                                                        : NSFloatingWindowLevel)
                                          : NSNormalWindowLevel];

            isAlwaysOnTop = alwaysOnTop;
        }

        return true;
    }

    void toFront (bool makeActiveWindow) override
    {
        if (isSharedWindow)
            [[view superview] addSubview: view
                              positioned: NSWindowAbove
                              relativeTo: nil];

        if (window != nil && component.isVisible())
        {
            ++insideToFrontCall;

            if (makeActiveWindow)
                [window makeKeyAndOrderFront: nil];
            else
                [window orderFront: nil];

            if (insideToFrontCall <= 1)
            {
                Desktop::getInstance().getMainMouseSource().forceMouseCursorUpdate();
                handleBroughtToFront();
            }

            --insideToFrontCall;
        }
    }

    void toBehind (ComponentPeer* other) override
    {
        if (auto* otherPeer = dynamic_cast<NSViewComponentPeer*> (other))
        {
            if (isSharedWindow)
            {
                [[view superview] addSubview: view
                                  positioned: NSWindowBelow
                                  relativeTo: otherPeer->view];
            }
            else if (component.isVisible())
            {
                [window orderWindow: NSWindowBelow
                         relativeTo: [otherPeer->window windowNumber]];
            }
        }
        else
        {
            jassertfalse; // wrong type of window?
        }
    }

    void setIcon (const Image& newIcon) override
    {
        if (! isSharedWindow)
        {
            // need to set a dummy represented file here to show the file icon (which we then set to the new icon)
            if (! windowRepresentsFile)
                [window setRepresentedFilename:juceStringToNS (" ")]; // can't just use an empty string for some reason...

            [[window standardWindowButton:NSWindowDocumentIconButton] setImage:imageToNSImage (newIcon)];
        }
    }

    StringArray getAvailableRenderingEngines() override
    {
        StringArray s ("Software Renderer");

       #if USE_COREGRAPHICS_RENDERING
        s.add ("CoreGraphics Renderer");
       #endif

        return s;
    }

    int getCurrentRenderingEngine() const override
    {
        return usingCoreGraphics ? 1 : 0;
    }

    void setCurrentRenderingEngine (int index) override
    {
       #if USE_COREGRAPHICS_RENDERING
        if (usingCoreGraphics != (index > 0))
        {
            usingCoreGraphics = index > 0;
            [view setNeedsDisplay: true];
        }
       #else
        ignoreUnused (index);
       #endif
    }

    void redirectMouseDown (NSEvent* ev)
    {
        if (! Process::isForegroundProcess())
            Process::makeForegroundProcess();

        ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withFlags (getModifierForButtonNumber ([ev buttonNumber]));
        sendMouseEvent (ev);
    }

    void redirectMouseUp (NSEvent* ev)
    {
        ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withoutFlags (getModifierForButtonNumber ([ev buttonNumber]));
        sendMouseEvent (ev);
        showArrowCursorIfNeeded();
    }

    void redirectMouseDrag (NSEvent* ev)
    {
        ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withFlags (getModifierForButtonNumber ([ev buttonNumber]));
        sendMouseEvent (ev);
    }

    void redirectMouseMove (NSEvent* ev)
    {
        ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withoutMouseButtons();

        NSPoint windowPos = [ev locationInWindow];
        NSPoint screenPos = [[ev window] convertRectToScreen: NSMakeRect (windowPos.x, windowPos.y, 1.0f, 1.0f)].origin;

        if (isWindowAtPoint ([ev window], screenPos))
            sendMouseEvent (ev);
        else
            // moved into another window which overlaps this one, so trigger an exit
            handleMouseEvent (MouseInputSource::InputSourceType::mouse, MouseInputSource::offscreenMousePos, ModifierKeys::currentModifiers,
                              getMousePressure (ev), MouseInputSource::invalidOrientation, getMouseTime (ev));

        showArrowCursorIfNeeded();
    }

    void redirectMouseEnter (NSEvent* ev)
    {
        Desktop::getInstance().getMainMouseSource().forceMouseCursorUpdate();
        ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withoutMouseButtons();
        sendMouseEvent (ev);
    }

    void redirectMouseExit (NSEvent* ev)
    {
        ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withoutMouseButtons();
        sendMouseEvent (ev);
    }

    static float checkDeviceDeltaReturnValue (float v) noexcept
    {
        // (deviceDeltaX can fail and return NaN, so need to sanity-check the result)
        v *= 0.5f / 256.0f;
        return (v > -1000.0f && v < 1000.0f) ? v : 0.0f;
    }

    void redirectMouseWheel (NSEvent* ev)
    {
        updateModifiers (ev);

        MouseWheelDetails wheel;
        wheel.deltaX = 0;
        wheel.deltaY = 0;
        wheel.isReversed = false;
        wheel.isSmooth = false;
        wheel.isInertial = false;

        @try
        {
            if ([ev respondsToSelector: @selector (isDirectionInvertedFromDevice)])
                wheel.isReversed = [ev isDirectionInvertedFromDevice];

            wheel.isInertial = ([ev momentumPhase] != NSEventPhaseNone);

            if ([ev respondsToSelector: @selector (hasPreciseScrollingDeltas)])
            {
                if ([ev hasPreciseScrollingDeltas])
                {
                    const float scale = 0.5f / 256.0f;
                    wheel.deltaX = scale * (float) [ev scrollingDeltaX];
                    wheel.deltaY = scale * (float) [ev scrollingDeltaY];
                    wheel.isSmooth = true;
                }
            }
            else if ([ev respondsToSelector: @selector (deviceDeltaX)])
            {
                wheel.deltaX = checkDeviceDeltaReturnValue ((float) getMsgSendFPRetFn() (ev, @selector (deviceDeltaX)));
                wheel.deltaY = checkDeviceDeltaReturnValue ((float) getMsgSendFPRetFn() (ev, @selector (deviceDeltaY)));
            }
        }
        @catch (...)
        {}

        if (wheel.deltaX == 0.0f && wheel.deltaY == 0.0f)
        {
            const float scale = 10.0f / 256.0f;
            wheel.deltaX = scale * (float) [ev deltaX];
            wheel.deltaY = scale * (float) [ev deltaY];
        }

        handleMouseWheel (MouseInputSource::InputSourceType::mouse, getMousePos (ev, view), getMouseTime (ev), wheel);
    }

    void redirectMagnify (NSEvent* ev)
    {
        const float invScale = 1.0f - (float) [ev magnification];

        if (invScale > 0.0f)
            handleMagnifyGesture (MouseInputSource::InputSourceType::mouse, getMousePos (ev, view), getMouseTime (ev), 1.0f / invScale);
    }

    void redirectCopy  (NSObject*) { handleKeyPress (KeyPress ('c', ModifierKeys (ModifierKeys::commandModifier), 'c')); }
    void redirectPaste (NSObject*) { handleKeyPress (KeyPress ('v', ModifierKeys (ModifierKeys::commandModifier), 'v')); }
    void redirectCut   (NSObject*) { handleKeyPress (KeyPress ('x', ModifierKeys (ModifierKeys::commandModifier), 'x')); }

    void redirectWillMoveToWindow (NSWindow* newWindow)
    {
        if (isSharedWindow && [view window] == window && newWindow == nullptr)
        {
            if (auto* comp = safeComponent.get())
                comp->setVisible (false);
        }
    }

    void sendMouseEvent (NSEvent* ev)
    {
        updateModifiers (ev);
        handleMouseEvent (MouseInputSource::InputSourceType::mouse, getMousePos (ev, view), ModifierKeys::currentModifiers,
                          getMousePressure (ev), MouseInputSource::invalidOrientation, getMouseTime (ev));
    }

    bool handleKeyEvent (NSEvent* ev, bool isKeyDown)
    {
        auto unicode = nsStringToJuce ([ev characters]);
        auto keyCode = getKeyCodeFromEvent (ev);

       #if JUCE_DEBUG_KEYCODES
        DBG ("unicode: " + unicode + " " + String::toHexString ((int) unicode[0]));
        auto unmodified = nsStringToJuce ([ev charactersIgnoringModifiers]);
        DBG ("unmodified: " + unmodified + " " + String::toHexString ((int) unmodified[0]));
       #endif

        if (keyCode != 0 || unicode.isNotEmpty())
        {
            if (isKeyDown)
            {
                bool used = false;

                for (auto u = unicode.getCharPointer(); ! u.isEmpty();)
                {
                    auto textCharacter = u.getAndAdvance();

                    switch (keyCode)
                    {
                        case NSLeftArrowFunctionKey:
                        case NSRightArrowFunctionKey:
                        case NSUpArrowFunctionKey:
                        case NSDownArrowFunctionKey:
                        case NSPageUpFunctionKey:
                        case NSPageDownFunctionKey:
                        case NSEndFunctionKey:
                        case NSHomeFunctionKey:
                        case NSDeleteFunctionKey:
                            textCharacter = 0;
                            break; // (these all seem to generate unwanted garbage unicode strings)

                        default:
                            if (([ev modifierFlags] & NSEventModifierFlagCommand) != 0
                                 || (keyCode >= NSF1FunctionKey && keyCode <= NSF35FunctionKey))
                                textCharacter = 0;
                            break;
                    }

                    used = handleKeyUpOrDown (true) || used;
                    used = handleKeyPress (keyCode, textCharacter) || used;
                }

                return used;
            }

            if (handleKeyUpOrDown (false))
                return true;
        }

        return false;
    }

    bool redirectKeyDown (NSEvent* ev)
    {
        // (need to retain this in case a modal loop runs in handleKeyEvent and
        // our event object gets lost)
        const std::unique_ptr<NSEvent, NSObjectDeleter> r ([ev retain]);

        updateKeysDown (ev, true);
        bool used = handleKeyEvent (ev, true);

        if (([ev modifierFlags] & NSEventModifierFlagCommand) != 0)
        {
            // for command keys, the key-up event is thrown away, so simulate one..
            updateKeysDown (ev, false);
            used = (isValidPeer (this) && handleKeyEvent (ev, false)) || used;
        }

        // (If we're running modally, don't allow unused keystrokes to be passed
        // along to other blocked views..)
        if (Component::getCurrentlyModalComponent() != nullptr)
            used = true;

        return used;
    }

    bool redirectKeyUp (NSEvent* ev)
    {
        updateKeysDown (ev, false);
        return handleKeyEvent (ev, false)
                || Component::getCurrentlyModalComponent() != nullptr;
    }

    void redirectModKeyChange (NSEvent* ev)
    {
        // (need to retain this in case a modal loop runs and our event object gets lost)
        const std::unique_ptr<NSEvent, NSObjectDeleter> r ([ev retain]);

        keysCurrentlyDown.clear();
        handleKeyUpOrDown (true);

        updateModifiers (ev);
        handleModifierKeysChange();
    }

    //==============================================================================
    void drawRect (NSRect r)
    {
        if (r.size.width < 1.0f || r.size.height < 1.0f)
            return;

        auto cg = (CGContextRef) [[NSGraphicsContext currentContext]
       #if (defined (MAC_OS_X_VERSION_10_10) && MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_10)
                                  CGContext];
       #else
                                  graphicsPort];
       #endif

        if (! component.isOpaque())
            CGContextClearRect (cg, CGContextGetClipBoundingBox (cg));

        float displayScale = 1.0f;
        NSScreen* screen = [[view window] screen];

        if ([screen respondsToSelector: @selector (backingScaleFactor)])
            displayScale = (float) screen.backingScaleFactor;

       #if USE_COREGRAPHICS_RENDERING && JUCE_COREGRAPHICS_RENDER_WITH_MULTIPLE_PAINT_CALLS
        // This option invokes a separate paint call for each rectangle of the clip region.
        // It's a long story, but this is a basically a workaround for a CGContext not having
        // a way of finding whether a rectangle falls within its clip region
        if (usingCoreGraphics)
        {
            const NSRect* rects = nullptr;
            NSInteger numRects = 0;
            [view getRectsBeingDrawn: &rects count: &numRects];

            if (numRects > 1)
            {
                for (int i = 0; i < numRects; ++i)
                {
                    NSRect rect = rects[i];
                    CGContextSaveGState (cg);
                    CGContextClipToRect (cg, CGRectMake (rect.origin.x, rect.origin.y, rect.size.width, rect.size.height));
                    drawRect (cg, rect, displayScale);
                    CGContextRestoreGState (cg);
                }

                return;
            }
        }
       #endif

        drawRect (cg, r, displayScale);
    }

    void drawRect (CGContextRef cg, NSRect r, float displayScale)
    {
       #if USE_COREGRAPHICS_RENDERING
        if (usingCoreGraphics)
        {
            CoreGraphicsContext context (cg, (float) [view frame].size.height, displayScale);
            invokePaint (context);
        }
        else
       #endif
        {
            const Point<int> offset (-roundToInt (r.origin.x),
                                     -roundToInt ([view frame].size.height - (r.origin.y + r.size.height)));
            auto clipW = (int) (r.size.width  + 0.5f);
            auto clipH = (int) (r.size.height + 0.5f);

            RectangleList<int> clip;
            getClipRects (clip, offset, clipW, clipH);

            if (! clip.isEmpty())
            {
                Image temp (component.isOpaque() ? Image::RGB : Image::ARGB,
                            roundToInt (clipW * displayScale),
                            roundToInt (clipH * displayScale),
                            ! component.isOpaque());

                {
                    auto intScale = roundToInt (displayScale);

                    if (intScale != 1)
                        clip.scaleAll (intScale);

                    auto context = component.getLookAndFeel()
                                     .createGraphicsContext (temp, offset * intScale, clip);

                    if (intScale != 1)
                        context->addTransform (AffineTransform::scale (displayScale));

                    invokePaint (*context);
                }

                CGColorSpaceRef colourSpace = CGColorSpaceCreateDeviceRGB();
                CGImageRef image = juce_createCoreGraphicsImage (temp, colourSpace, false);
                CGColorSpaceRelease (colourSpace);
                CGContextDrawImage (cg, CGRectMake (r.origin.x, r.origin.y, clipW, clipH), image);
                CGImageRelease (image);
            }
        }
    }

    void repaint (const Rectangle<int>& area) override
    {
        // In 10.11 changes were made to the way the OS handles repaint regions, and it seems that it can
        // no longer be trusted to coalesce all the regions, or to even remember them all without losing
        // a few when there's a lot of activity.
        // As a work around for this, we use a RectangleList to do our own coalescing of regions before
        // asynchronously asking the OS to repaint them.
        deferredRepaints.add ((float) area.getX(), (float) ([view frame].size.height - area.getBottom()),
                              (float) area.getWidth(), (float) area.getHeight());

        if (isTimerRunning())
            return;

        auto now = Time::getMillisecondCounter();
        auto msSinceLastRepaint = (lastRepaintTime >= now) ? now - lastRepaintTime
                                                           : (std::numeric_limits<uint32>::max() - lastRepaintTime) + now;

        static uint32 minimumRepaintInterval = 1000 / 30; // 30fps

        // When windows are being resized, artificially throttling high-frequency repaints helps
        // to stop the event queue getting clogged, and keeps everything working smoothly.
        // For some reason Logic also needs this throttling to record parameter events correctly.
        if (msSinceLastRepaint < minimumRepaintInterval && shouldThrottleRepaint())
        {
            startTimer (static_cast<int> (minimumRepaintInterval - msSinceLastRepaint));
            return;
        }

        setNeedsDisplayRectangles();
    }

    static bool shouldThrottleRepaint()
    {
        return areAnyWindowsInLiveResize() || ! JUCEApplication::isStandaloneApp();
    }

    void timerCallback() override
    {
        setNeedsDisplayRectangles();
        stopTimer();
    }

    void setNeedsDisplayRectangles()
    {
        for (auto& i : deferredRepaints)
            [view setNeedsDisplayInRect: makeNSRect (i)];

        lastRepaintTime = Time::getMillisecondCounter();
        deferredRepaints.clear();
    }

    void invokePaint (LowLevelGraphicsContext& context)
    {
        handlePaint (context);
    }

    void performAnyPendingRepaintsNow() override
    {
        [view displayIfNeeded];
    }

    static bool areAnyWindowsInLiveResize() noexcept
    {
        for (NSWindow* w in [NSApp windows])
            if ([w inLiveResize])
                return true;

        return false;
    }

    //==============================================================================
    bool isBlockedByModalComponent()
    {
        if (auto* modal = Component::getCurrentlyModalComponent())
        {
            if (insideToFrontCall == 0
                 && (! getComponent().isParentOf (modal))
                 && getComponent().isCurrentlyBlockedByAnotherModalComponent())
            {
                return true;
            }
        }

        return false;
    }

    void sendModalInputAttemptIfBlocked()
    {
        if (isBlockedByModalComponent())
            if (auto* modal = Component::getCurrentlyModalComponent())
                modal->inputAttemptWhenModal();
    }

    bool canBecomeKeyWindow()
    {
        return component.isVisible() && (getStyleFlags() & juce::ComponentPeer::windowIgnoresKeyPresses) == 0;
    }

    bool canBecomeMainWindow()
    {
        return component.isVisible() && dynamic_cast<ResizableWindow*> (&component) != nullptr;
    }

    bool worksWhenModal() const
    {
        // In plugins, the host could put our plugin window inside a modal window, so this
        // allows us to successfully open other popups. Feels like there could be edge-case
        // problems caused by this, so let us know if you spot any issues..
        return ! JUCEApplication::isStandaloneApp();
    }

    void becomeKeyWindow()
    {
        handleBroughtToFront();
        grabFocus();
    }

    bool windowShouldClose()
    {
        if (! isValidPeer (this))
            return YES;

        handleUserClosingWindow();
        return NO;
    }

    void redirectMovedOrResized()
    {
        updateFullscreenStatus();
        handleMovedOrResized();
    }

    void viewMovedToWindow()
    {
        if (isSharedWindow)
        {
            auto newWindow = [view window];
            bool shouldSetVisible = (window == nullptr && newWindow != nullptr);

            window = newWindow;

            if (shouldSetVisible)
                getComponent().setVisible (true);
        }
    }

    void liveResizingStart()
    {
        if (constrainer == nullptr)
            return;

        constrainer->resizeStart();
        isFirstLiveResize = true;

        setFullScreenSizeConstraints (*constrainer);
    }

    void liveResizingEnd()
    {
        if (constrainer != nullptr)
            constrainer->resizeEnd();
    }

    NSRect constrainRect (const NSRect r)
    {
        if (constrainer == nullptr || isKioskMode())
            return r;

        const auto scale = getComponent().getDesktopScaleFactor();

        auto pos            = ScalingHelpers::unscaledScreenPosToScaled (scale, convertToRectInt (flippedScreenRect (r)));
        const auto original = ScalingHelpers::unscaledScreenPosToScaled (scale, convertToRectInt (flippedScreenRect ([window frame])));

        const auto screenBounds = Desktop::getInstance().getDisplays().getTotalBounds (true);

        const bool inLiveResize = [window inLiveResize];

        if (! inLiveResize || isFirstLiveResize)
        {
            isFirstLiveResize = false;

            isStretchingTop    = (pos.getY() != original.getY() && pos.getBottom() == original.getBottom());
            isStretchingLeft   = (pos.getX() != original.getX() && pos.getRight()  == original.getRight());
            isStretchingBottom = (pos.getY() == original.getY() && pos.getBottom() != original.getBottom());
            isStretchingRight  = (pos.getX() == original.getX() && pos.getRight()  != original.getRight());
        }

        constrainer->checkBounds (pos, original, screenBounds,
                                  isStretchingTop, isStretchingLeft, isStretchingBottom, isStretchingRight);

        return flippedScreenRect (makeNSRect (ScalingHelpers::scaledScreenPosToUnscaled (scale, pos)));
    }

    static void showArrowCursorIfNeeded()
    {
        auto& desktop = Desktop::getInstance();
        auto mouse = desktop.getMainMouseSource();

        if (mouse.getComponentUnderMouse() == nullptr
             && desktop.findComponentAt (mouse.getScreenPosition().roundToInt()) == nullptr)
        {
            [[NSCursor arrowCursor] set];
        }
    }

    static void updateModifiers (NSEvent* e)
    {
        updateModifiers ([e modifierFlags]);
    }

    static void updateModifiers (const NSUInteger flags)
    {
        int m = 0;

        if ((flags & NSEventModifierFlagShift) != 0)        m |= ModifierKeys::shiftModifier;
        if ((flags & NSEventModifierFlagControl) != 0)      m |= ModifierKeys::ctrlModifier;
        if ((flags & NSEventModifierFlagOption) != 0)       m |= ModifierKeys::altModifier;
        if ((flags & NSEventModifierFlagCommand) != 0)      m |= ModifierKeys::commandModifier;

        ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withOnlyMouseButtons().withFlags (m);
    }

    static void updateKeysDown (NSEvent* ev, bool isKeyDown)
    {
        updateModifiers (ev);

        if (auto keyCode = getKeyCodeFromEvent (ev))
        {
            if (isKeyDown)
                keysCurrentlyDown.addIfNotAlreadyThere (keyCode);
            else
                keysCurrentlyDown.removeFirstMatchingValue (keyCode);
        }
    }

    static int getKeyCodeFromEvent (NSEvent* ev)
    {
        // Unfortunately, charactersIgnoringModifiers does not ignore the shift key.
        // Using [ev keyCode] is not a solution either as this will,
        // for example, return VK_KEY_Y if the key is pressed which
        // is typically located at the Y key position on a QWERTY
        // keyboard. However, on international keyboards this might not
        // be the key labeled Y (for example, on German keyboards this key
        // has a Z label). Therefore, we need to query the current keyboard
        // layout to figure out what character the key would have produced
        // if the shift key was not pressed
        String unmodified;

       #if JUCE_SUPPORT_CARBON
        if (TISInputSourceRef currentKeyboard = TISCopyCurrentKeyboardInputSource())
        {
            if (auto layoutData = (CFDataRef) TISGetInputSourceProperty (currentKeyboard,
                                                                         kTISPropertyUnicodeKeyLayoutData))
            {
                if (auto* layoutPtr = (const UCKeyboardLayout*) CFDataGetBytePtr (layoutData))
                {
                    UInt32 keysDown = 0;
                    UniChar buffer[4];
                    UniCharCount actual;

                    if (UCKeyTranslate (layoutPtr, [ev keyCode], kUCKeyActionDown, 0, LMGetKbdType(),
                                        kUCKeyTranslateNoDeadKeysBit, &keysDown, sizeof (buffer) / sizeof (UniChar),
                                        &actual, buffer) == 0)
                        unmodified = String (CharPointer_UTF16 (reinterpret_cast<CharPointer_UTF16::CharType*> (buffer)), 4);
                }
            }

            CFRelease (currentKeyboard);
        }

        // did the above layout conversion fail
        if (unmodified.isEmpty())
       #endif
        {
            unmodified = nsStringToJuce ([ev charactersIgnoringModifiers]);
        }

        auto keyCode = (int) unmodified[0];

        if (keyCode == 0x19) // (backwards-tab)
            keyCode = '\t';
        else if (keyCode == 0x03) // (enter)
            keyCode = '\r';
        else
            keyCode = (int) CharacterFunctions::toUpperCase ((juce_wchar) keyCode);

        if (([ev modifierFlags] & NSEventModifierFlagNumericPad) != 0)
        {
            const int numPadConversions[] = { '0', KeyPress::numberPad0, '1', KeyPress::numberPad1,
                                              '2', KeyPress::numberPad2, '3', KeyPress::numberPad3,
                                              '4', KeyPress::numberPad4, '5', KeyPress::numberPad5,
                                              '6', KeyPress::numberPad6, '7', KeyPress::numberPad7,
                                              '8', KeyPress::numberPad8, '9', KeyPress::numberPad9,
                                              '+', KeyPress::numberPadAdd, '-', KeyPress::numberPadSubtract,
                                              '*', KeyPress::numberPadMultiply, '/', KeyPress::numberPadDivide,
                                              '.', KeyPress::numberPadDecimalPoint,
                                              ',', KeyPress::numberPadDecimalPoint, // (to deal with non-english kbds)
                                              '=', KeyPress::numberPadEquals };

            for (int i = 0; i < numElementsInArray (numPadConversions); i += 2)
                if (keyCode == numPadConversions [i])
                    keyCode = numPadConversions [i + 1];
        }

        return keyCode;
    }

    static int64 getMouseTime (NSEvent* e) noexcept
    {
        return (Time::currentTimeMillis() - Time::getMillisecondCounter())
                 + (int64) ([e timestamp] * 1000.0);
    }

    static float getMousePressure (NSEvent* e) noexcept
    {
        @try
        {
            if (e.type != NSEventTypeMouseEntered && e.type != NSEventTypeMouseExited)
                return (float) e.pressure;
        }
        @catch (NSException* e) {}
        @finally {}

        return 0.0f;
    }

    static Point<float> getMousePos (NSEvent* e, NSView* view)
    {
        NSPoint p = [view convertPoint: [e locationInWindow] fromView: nil];
        return { (float) p.x, (float) ([view frame].size.height - p.y) };
    }

    static int getModifierForButtonNumber (const NSInteger num)
    {
        return num == 0 ? ModifierKeys::leftButtonModifier
                        : (num == 1 ? ModifierKeys::rightButtonModifier
                                    : (num == 2 ? ModifierKeys::middleButtonModifier : 0));
    }

    static unsigned int getNSWindowStyleMask (const int flags) noexcept
    {
        unsigned int style = (flags & windowHasTitleBar) != 0 ? NSWindowStyleMaskTitled
                                                              : NSWindowStyleMaskBorderless;

        if ((flags & windowHasMinimiseButton) != 0)  style |= NSWindowStyleMaskMiniaturizable;
        if ((flags & windowHasCloseButton) != 0)     style |= NSWindowStyleMaskClosable;
        if ((flags & windowIsResizable) != 0)        style |= NSWindowStyleMaskResizable;
        return style;
    }

    static NSArray* getSupportedDragTypes()
    {
        return [NSArray arrayWithObjects: (NSString*) kUTTypeFileURL, (NSString*) kPasteboardTypeFileURLPromise, NSPasteboardTypeString, nil];
    }

    BOOL sendDragCallback (const int type, id <NSDraggingInfo> sender)
    {
        NSPasteboard* pasteboard = [sender draggingPasteboard];
        NSString* contentType = [pasteboard availableTypeFromArray: getSupportedDragTypes()];

        if (contentType == nil)
            return false;

        NSPoint p = [view convertPoint: [sender draggingLocation] fromView: nil];
        ComponentPeer::DragInfo dragInfo;
        dragInfo.position.setXY ((int) p.x, (int) ([view frame].size.height - p.y));

        if (contentType == NSPasteboardTypeString)
            dragInfo.text = nsStringToJuce ([pasteboard stringForType: NSPasteboardTypeString]);
        else
            dragInfo.files = getDroppedFiles (pasteboard, contentType);

        if (! dragInfo.isEmpty())
        {
            switch (type)
            {
                case 0:   return handleDragMove (dragInfo);
                case 1:   return handleDragExit (dragInfo);
                case 2:   return handleDragDrop (dragInfo);
                default:  jassertfalse; break;
            }
        }

        return false;
    }

    StringArray getDroppedFiles (NSPasteboard* pasteboard, NSString* contentType)
    {
        StringArray files;
        NSString* iTunesPasteboardType = nsStringLiteral ("CorePasteboardFlavorType 0x6974756E"); // 'itun'

        if ([contentType isEqualToString: (NSString*) kPasteboardTypeFileURLPromise]
             && [[pasteboard types] containsObject: iTunesPasteboardType])
        {
            id list = [pasteboard propertyListForType: iTunesPasteboardType];

            if ([list isKindOfClass: [NSDictionary class]])
            {
                NSDictionary* iTunesDictionary = (NSDictionary*) list;
                NSArray* tracks = [iTunesDictionary valueForKey: nsStringLiteral ("Tracks")];
                NSEnumerator* enumerator = [tracks objectEnumerator];
                NSDictionary* track;

                while ((track = [enumerator nextObject]) != nil)
                {
                    if (id value = [track valueForKey: nsStringLiteral ("Location")])
                    {
                        NSURL* url = [NSURL URLWithString: value];

                        if ([url isFileURL])
                            files.add (nsStringToJuce ([url path]));
                    }
                }
            }
        }
        else
        {
            NSArray* items = [pasteboard readObjectsForClasses:@[[NSURL class]] options: nil];

            for (unsigned int i = 0; i < [items count]; ++i)
            {
                NSURL* url = [items objectAtIndex: i];

                if ([url isFileURL])
                    files.add (nsStringToJuce ([url path]));
            }
        }

        return files;
    }

    //==============================================================================
    void viewFocusGain()
    {
        if (currentlyFocusedPeer != this)
        {
            if (ComponentPeer::isValidPeer (currentlyFocusedPeer))
                currentlyFocusedPeer->handleFocusLoss();

            currentlyFocusedPeer = this;
            handleFocusGain();
        }
    }

    void viewFocusLoss()
    {
        if (currentlyFocusedPeer == this)
        {
            currentlyFocusedPeer = nullptr;
            handleFocusLoss();
        }
    }

    bool isFocused() const override
    {
        return (isSharedWindow || ! JUCEApplication::isStandaloneApp())
                    ? this == currentlyFocusedPeer
                    : [window isKeyWindow];
    }

    void grabFocus() override
    {
        if (window != nil)
        {
            [window makeKeyWindow];
            [window makeFirstResponder: view];

            viewFocusGain();
        }
    }

    void textInputRequired (Point<int>, TextInputTarget&) override {}

    void resetWindowPresentation()
    {
        if (hasNativeTitleBar())
        {
            [window setStyleMask: (NSViewComponentPeer::getNSWindowStyleMask (getStyleFlags()))];
            setTitle (getComponent().getName()); // required to force the OS to update the title
        }

        [NSApp setPresentationOptions: NSApplicationPresentationDefault];
    }

    //==============================================================================
    NSWindow* window = nil;
    NSView* view = nil;
    WeakReference<Component> safeComponent;
    bool isSharedWindow = false, fullScreen = false;
    bool isWindowInKioskMode = false;
   #if USE_COREGRAPHICS_RENDERING
    bool usingCoreGraphics = true;
   #else
    bool usingCoreGraphics = false;
   #endif
    bool isZooming = false, isFirstLiveResize = false, textWasInserted = false;
    bool isStretchingTop = false, isStretchingLeft = false, isStretchingBottom = false, isStretchingRight = false;
    bool windowRepresentsFile = false;
    bool isAlwaysOnTop = false, wasAlwaysOnTop = false;
    String stringBeingComposed;
    NSNotificationCenter* notificationCenter = nil;

    RectangleList<float> deferredRepaints;
    uint32 lastRepaintTime;

    static ComponentPeer* currentlyFocusedPeer;
    static Array<int> keysCurrentlyDown;
    static int insideToFrontCall;

private:
    static NSView* createViewInstance();
    static NSWindow* createWindowInstance();

    static void setOwner (id viewOrWindow, NSViewComponentPeer* newOwner)
    {
        object_setInstanceVariable (viewOrWindow, "owner", newOwner);
    }

    void getClipRects (RectangleList<int>& clip, Point<int> offset, int clipW, int clipH)
    {
        const NSRect* rects = nullptr;
        NSInteger numRects = 0;
        [view getRectsBeingDrawn: &rects count: &numRects];

        const Rectangle<int> clipBounds (clipW, clipH);
        auto viewH = [view frame].size.height;

        clip.ensureStorageAllocated ((int) numRects);

        for (int i = 0; i < numRects; ++i)
            clip.addWithoutMerging (clipBounds.getIntersection (Rectangle<int> (roundToInt (rects[i].origin.x) + offset.x,
                                                                                roundToInt (viewH - (rects[i].origin.y + rects[i].size.height)) + offset.y,
                                                                                roundToInt (rects[i].size.width),
                                                                                roundToInt (rects[i].size.height))));
    }

    static void appFocusChanged()
    {
        keysCurrentlyDown.clear();

        if (isValidPeer (currentlyFocusedPeer))
        {
            if (Process::isForegroundProcess())
            {
                currentlyFocusedPeer->handleFocusGain();
                ModalComponentManager::getInstance()->bringModalComponentsToFront();
            }
            else
            {
                currentlyFocusedPeer->handleFocusLoss();
            }
        }
    }

    static bool checkEventBlockedByModalComps (NSEvent* e)
    {
        if (Component::getNumCurrentlyModalComponents() == 0)
            return false;

        NSWindow* const w = [e window];

        if (w == nil || [w worksWhenModal])
            return false;

        bool isKey = false, isInputAttempt = false;

        switch ([e type])
        {
            case NSEventTypeKeyDown:
            case NSEventTypeKeyUp:
                isKey = isInputAttempt = true;
                break;

            case NSEventTypeLeftMouseDown:
            case NSEventTypeRightMouseDown:
            case NSEventTypeOtherMouseDown:
                isInputAttempt = true;
                break;

            case NSEventTypeLeftMouseDragged:
            case NSEventTypeRightMouseDragged:
            case NSEventTypeLeftMouseUp:
            case NSEventTypeRightMouseUp:
            case NSEventTypeOtherMouseUp:
            case NSEventTypeOtherMouseDragged:
                if (Desktop::getInstance().getDraggingMouseSource(0) != nullptr)
                    return false;
                break;

            case NSEventTypeMouseMoved:
            case NSEventTypeMouseEntered:
            case NSEventTypeMouseExited:
            case NSEventTypeCursorUpdate:
            case NSEventTypeScrollWheel:
            case NSEventTypeTabletPoint:
            case NSEventTypeTabletProximity:
                break;

            case NSEventTypeFlagsChanged:
            case NSEventTypeAppKitDefined:
            case NSEventTypeSystemDefined:
            case NSEventTypeApplicationDefined:
            case NSEventTypePeriodic:
            case NSEventTypeGesture:
            case NSEventTypeMagnify:
            case NSEventTypeSwipe:
            case NSEventTypeRotate:
            case NSEventTypeBeginGesture:
            case NSEventTypeEndGesture:
            case NSEventTypeQuickLook:
           #if JUCE_64BIT
            case NSEventTypeSmartMagnify:
            case NSEventTypePressure:
           #endif
          #if defined (MAC_OS_X_VERSION_10_12) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_12
           #if JUCE_64BIT
            case NSEventTypeDirectTouch:
           #endif
           #if defined (MAC_OS_X_VERSION_10_15) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_15
            case NSEventTypeChangeMode:
           #endif
          #endif
            default:
                return false;
        }

        for (int i = ComponentPeer::getNumPeers(); --i >= 0;)
        {
            if (auto* peer = dynamic_cast<NSViewComponentPeer*> (ComponentPeer::getPeer (i)))
            {
                if ([peer->view window] == w)
                {
                    if (isKey)
                    {
                        if (peer->view == [w firstResponder])
                            return false;
                    }
                    else
                    {
                        if (peer->isSharedWindow
                               ? NSPointInRect ([peer->view convertPoint: [e locationInWindow] fromView: nil], [peer->view bounds])
                               : NSPointInRect ([e locationInWindow], NSMakeRect (0, 0, [w frame].size.width, [w frame].size.height)))
                            return false;
                    }
                }
            }
        }

        if (isInputAttempt)
        {
            if (! [NSApp isActive])
                [NSApp activateIgnoringOtherApps: YES];

            if (auto* modal = Component::getCurrentlyModalComponent())
                modal->inputAttemptWhenModal();
        }

        return true;
    }

    void setFullScreenSizeConstraints (const ComponentBoundsConstrainer& c)
    {
        const auto minSize = NSMakeSize (static_cast<float> (c.getMinimumWidth()),
                                         0.0f);
        [window setMinFullScreenContentSize: minSize];
    }

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (NSViewComponentPeer)
};

int NSViewComponentPeer::insideToFrontCall = 0;

//==============================================================================
struct JuceNSViewClass   : public ObjCClass<NSView>
{
    JuceNSViewClass()  : ObjCClass<NSView> ("JUCEView_")
    {
        addIvar<NSViewComponentPeer*> ("owner");

        addMethod (@selector (isOpaque),                      isOpaque,                   "c@:");
        addMethod (@selector (drawRect:),                     drawRect,                   "v@:", @encode (NSRect));
        addMethod (@selector (mouseDown:),                    mouseDown,                  "v@:@");
        addMethod (@selector (asyncMouseDown:),               asyncMouseDown,             "v@:@");
        addMethod (@selector (mouseUp:),                      mouseUp,                    "v@:@");
        addMethod (@selector (asyncMouseUp:),                 asyncMouseUp,               "v@:@");
        addMethod (@selector (mouseDragged:),                 mouseDragged,               "v@:@");
        addMethod (@selector (mouseMoved:),                   mouseMoved,                 "v@:@");
        addMethod (@selector (mouseEntered:),                 mouseEntered,               "v@:@");
        addMethod (@selector (mouseExited:),                  mouseExited,                "v@:@");
        addMethod (@selector (rightMouseDown:),               mouseDown,                  "v@:@");
        addMethod (@selector (rightMouseDragged:),            mouseDragged,               "v@:@");
        addMethod (@selector (rightMouseUp:),                 mouseUp,                    "v@:@");
        addMethod (@selector (otherMouseDown:),               mouseDown,                  "v@:@");
        addMethod (@selector (otherMouseDragged:),            mouseDragged,               "v@:@");
        addMethod (@selector (otherMouseUp:),                 mouseUp,                    "v@:@");
        addMethod (@selector (scrollWheel:),                  scrollWheel,                "v@:@");
        addMethod (@selector (magnifyWithEvent:),             magnify,                    "v@:@");
        addMethod (@selector (acceptsFirstMouse:),            acceptsFirstMouse,          "c@:@");
        addMethod (@selector (frameChanged:),                 frameChanged,               "v@:@");
        addMethod (@selector (windowWillMiniaturize:),        windowWillMiniaturize,      "v@:@");
        addMethod (@selector (windowDidDeminiaturize:),       windowDidDeminiaturize,     "v@:@");
        addMethod (@selector (wantsDefaultClipping:),         wantsDefaultClipping,       "c@:");
        addMethod (@selector (worksWhenModal),                worksWhenModal,             "c@:");
        addMethod (@selector (viewDidMoveToWindow),           viewDidMoveToWindow,        "v@:");
        addMethod (@selector (keyDown:),                      keyDown,                    "v@:@");
        addMethod (@selector (keyUp:),                        keyUp,                      "v@:@");
        addMethod (@selector (insertText:),                   insertText,                 "v@:@");
        addMethod (@selector (doCommandBySelector:),          doCommandBySelector,        "v@::");
        addMethod (@selector (setMarkedText:selectedRange:),  setMarkedText,              "v@:@", @encode (NSRange));
        addMethod (@selector (unmarkText),                    unmarkText,                 "v@:");
        addMethod (@selector (hasMarkedText),                 hasMarkedText,              "c@:");
        addMethod (@selector (conversationIdentifier),        conversationIdentifier,     "l@:");
        addMethod (@selector (attributedSubstringFromRange:), attributedSubstringFromRange, "@@:", @encode (NSRange));
        addMethod (@selector (markedRange),                   markedRange,                @encode (NSRange), "@:");
        addMethod (@selector (selectedRange),                 selectedRange,              @encode (NSRange), "@:");
        addMethod (@selector (firstRectForCharacterRange:),   firstRectForCharacterRange, @encode (NSRect), "@:", @encode (NSRange));
        addMethod (@selector (characterIndexForPoint:),       characterIndexForPoint,     "L@:", @encode (NSPoint));
        addMethod (@selector (validAttributesForMarkedText),  validAttributesForMarkedText, "@@:");
        addMethod (@selector (flagsChanged:),                 flagsChanged,               "v@:@");

        addMethod (@selector (becomeFirstResponder),          becomeFirstResponder,       "c@:");
        addMethod (@selector (resignFirstResponder),          resignFirstResponder,       "c@:");
        addMethod (@selector (acceptsFirstResponder),         acceptsFirstResponder,      "c@:");

        addMethod (@selector (draggingEntered:),              draggingEntered,            @encode (NSDragOperation), "@:@");
        addMethod (@selector (draggingUpdated:),              draggingUpdated,            @encode (NSDragOperation), "@:@");
        addMethod (@selector (draggingEnded:),                draggingEnded,              "v@:@");
        addMethod (@selector (draggingExited:),               draggingExited,             "v@:@");
        addMethod (@selector (prepareForDragOperation:),      prepareForDragOperation,    "c@:@");
        addMethod (@selector (performDragOperation:),         performDragOperation,       "c@:@");
        addMethod (@selector (concludeDragOperation:),        concludeDragOperation,      "v@:@");

        addMethod (@selector (paste:),                        paste,                      "v@:@");
        addMethod (@selector (copy:),                         copy,                       "v@:@");
        addMethod (@selector (cut:),                          cut,                        "v@:@");

        addMethod (@selector (viewWillMoveToWindow:),         willMoveToWindow,           "v@:@");

        addProtocol (@protocol (NSTextInput));

        registerClass();
    }

private:
    static NSViewComponentPeer* getOwner (id self)
    {
        return getIvar<NSViewComponentPeer*> (self, "owner");
    }

    static void mouseDown (id self, SEL s, NSEvent* ev)
    {
        if (JUCEApplicationBase::isStandaloneApp())
            asyncMouseDown (self, s, ev);
        else
            // In some host situations, the host will stop modal loops from working
            // correctly if they're called from a mouse event, so we'll trigger
            // the event asynchronously..
            [self performSelectorOnMainThread: @selector (asyncMouseDown:)
                                   withObject: ev
                                waitUntilDone: NO];
    }

    static void mouseUp (id self, SEL s, NSEvent* ev)
    {
        if (JUCEApplicationBase::isStandaloneApp())
            asyncMouseUp (self, s, ev);
        else
            // In some host situations, the host will stop modal loops from working
            // correctly if they're called from a mouse event, so we'll trigger
            // the event asynchronously..
            [self performSelectorOnMainThread: @selector (asyncMouseUp:)
                                   withObject: ev
                                waitUntilDone: NO];
    }

    static void asyncMouseDown   (id self, SEL, NSEvent* ev)   { if (auto* p = getOwner (self)) p->redirectMouseDown  (ev); }
    static void asyncMouseUp     (id self, SEL, NSEvent* ev)   { if (auto* p = getOwner (self)) p->redirectMouseUp    (ev); }
    static void mouseDragged     (id self, SEL, NSEvent* ev)   { if (auto* p = getOwner (self)) p->redirectMouseDrag  (ev); }
    static void mouseMoved       (id self, SEL, NSEvent* ev)   { if (auto* p = getOwner (self)) p->redirectMouseMove  (ev); }
    static void mouseEntered     (id self, SEL, NSEvent* ev)   { if (auto* p = getOwner (self)) p->redirectMouseEnter (ev); }
    static void mouseExited      (id self, SEL, NSEvent* ev)   { if (auto* p = getOwner (self)) p->redirectMouseExit  (ev); }
    static void scrollWheel      (id self, SEL, NSEvent* ev)   { if (auto* p = getOwner (self)) p->redirectMouseWheel (ev); }
    static void magnify          (id self, SEL, NSEvent* ev)   { if (auto* p = getOwner (self)) p->redirectMagnify    (ev); }
    static void copy             (id self, SEL, NSObject* s)   { if (auto* p = getOwner (self)) p->redirectCopy       (s);  }
    static void paste            (id self, SEL, NSObject* s)   { if (auto* p = getOwner (self)) p->redirectPaste      (s);  }
    static void cut              (id self, SEL, NSObject* s)   { if (auto* p = getOwner (self)) p->redirectCut        (s);  }
    static void willMoveToWindow (id self, SEL, NSWindow* w)   { if (auto* p = getOwner (self)) p->redirectWillMoveToWindow (w); }

    static BOOL acceptsFirstMouse (id, SEL, NSEvent*)          { return YES; }
    static BOOL wantsDefaultClipping (id, SEL)                 { return YES; } // (this is the default, but may want to customise it in future)
    static BOOL worksWhenModal (id self, SEL)                  { if (auto* p = getOwner (self)) return p->worksWhenModal(); return NO; }

    static void drawRect (id self, SEL, NSRect r)              { if (auto* p = getOwner (self)) p->drawRect (r); }
    static void frameChanged (id self, SEL, NSNotification*)   { if (auto* p = getOwner (self)) p->redirectMovedOrResized(); }
    static void viewDidMoveToWindow (id self, SEL)             { if (auto* p = getOwner (self)) p->viewMovedToWindow(); }

    static void windowWillMiniaturize (id self, SEL, NSNotification*)
    {
        if (auto* p = getOwner (self))
        {
            if (p->isAlwaysOnTop)
            {
                // there is a bug when restoring minimised always on top windows so we need
                // to remove this behaviour before minimising and restore it afterwards
                p->setAlwaysOnTop (false);
                p->wasAlwaysOnTop = true;
            }
        }
    }

    static void windowDidDeminiaturize (id self, SEL, NSNotification*)
    {
        if (auto* p = getOwner (self))
        {
            if (p->wasAlwaysOnTop)
                p->setAlwaysOnTop (true);

            p->redirectMovedOrResized();
        }
    }

    static BOOL isOpaque (id self, SEL)
    {
        auto* owner = getOwner (self);
        return owner == nullptr || owner->getComponent().isOpaque();
    }

    //==============================================================================
    static void keyDown (id self, SEL, NSEvent* ev)
    {
        if (auto* owner = getOwner (self))
        {
            auto* target = owner->findCurrentTextInputTarget();
            owner->textWasInserted = false;

            if (target != nullptr)
                [(NSView*) self interpretKeyEvents: [NSArray arrayWithObject: ev]];
            else
                owner->stringBeingComposed.clear();

            if (! (owner->textWasInserted || owner->redirectKeyDown (ev)))
            {
                objc_super s = { self, [NSView class] };
                getMsgSendSuperFn() (&s, @selector (keyDown:), ev);
            }
        }
    }

    static void keyUp (id self, SEL, NSEvent* ev)
    {
        auto* owner = getOwner (self);

        if (owner == nullptr || ! owner->redirectKeyUp (ev))
        {
            objc_super s = { self, [NSView class] };
            getMsgSendSuperFn() (&s, @selector (keyUp:), ev);
        }
    }

    //==============================================================================
    static void insertText (id self, SEL, id aString)
    {
        // This commits multi-byte text when return is pressed, or after every keypress for western keyboards
        if (auto* owner = getOwner (self))
        {
            NSString* newText = [aString isKindOfClass: [NSAttributedString class]] ? [aString string] : aString;

            if ([newText length] > 0)
            {
                if (auto* target = owner->findCurrentTextInputTarget())
                {
                    target->insertTextAtCaret (nsStringToJuce (newText));
                    owner->textWasInserted = true;
                }
            }

            owner->stringBeingComposed.clear();
        }
    }

    static void doCommandBySelector (id, SEL, SEL) {}

    static void setMarkedText (id self, SEL, id aString, NSRange)
    {
        if (auto* owner = getOwner (self))
        {
            owner->stringBeingComposed = nsStringToJuce ([aString isKindOfClass: [NSAttributedString class]]
                                                           ? [aString string] : aString);

            if (auto* target = owner->findCurrentTextInputTarget())
            {
                auto currentHighlight = target->getHighlightedRegion();
                target->insertTextAtCaret (owner->stringBeingComposed);
                target->setHighlightedRegion (currentHighlight.withLength (owner->stringBeingComposed.length()));
                owner->textWasInserted = true;
            }
        }
    }

    static void unmarkText (id self, SEL)
    {
        if (auto* owner = getOwner (self))
        {
            if (owner->stringBeingComposed.isNotEmpty())
            {
                if (auto* target = owner->findCurrentTextInputTarget())
                {
                    target->insertTextAtCaret (owner->stringBeingComposed);
                    owner->textWasInserted = true;
                }

                owner->stringBeingComposed.clear();
            }
        }
    }

    static BOOL hasMarkedText (id self, SEL)
    {
        auto* owner = getOwner (self);
        return owner != nullptr && owner->stringBeingComposed.isNotEmpty();
    }

    static long conversationIdentifier (id self, SEL)
    {
        return (long) (pointer_sized_int) self;
    }

    static NSAttributedString* attributedSubstringFromRange (id self, SEL, NSRange theRange)
    {
        if (auto* owner = getOwner (self))
        {
            if (auto* target = owner->findCurrentTextInputTarget())
            {
                Range<int> r ((int) theRange.location,
                              (int) (theRange.location + theRange.length));

                return [[[NSAttributedString alloc] initWithString: juceStringToNS (target->getTextInRange (r))] autorelease];
            }
        }

        return nil;
    }

    static NSRange markedRange (id self, SEL)
    {
        if (auto* owner = getOwner (self))
            if (owner->stringBeingComposed.isNotEmpty())
                return NSMakeRange (0, (NSUInteger) owner->stringBeingComposed.length());

        return NSMakeRange (NSNotFound, 0);
    }

    static NSRange selectedRange (id self, SEL)
    {
        if (auto* owner = getOwner (self))
        {
            if (auto* target = owner->findCurrentTextInputTarget())
            {
                auto highlight = target->getHighlightedRegion();

                if (! highlight.isEmpty())
                    return NSMakeRange ((NSUInteger) highlight.getStart(),
                                        (NSUInteger) highlight.getLength());
            }
        }

        return NSMakeRange (NSNotFound, 0);
    }

    static NSRect firstRectForCharacterRange (id self, SEL, NSRange)
    {
        if (auto* owner = getOwner (self))
            if (auto* comp = dynamic_cast<Component*> (owner->findCurrentTextInputTarget()))
                return flippedScreenRect (makeNSRect (comp->getScreenBounds()));

        return NSZeroRect;
    }

    static NSUInteger characterIndexForPoint (id, SEL, NSPoint)     { return NSNotFound; }
    static NSArray* validAttributesForMarkedText (id, SEL)          { return [NSArray array]; }

    //==============================================================================
    static void flagsChanged (id self, SEL, NSEvent* ev)
    {
        if (auto* owner = getOwner (self))
            owner->redirectModKeyChange (ev);
    }

    static BOOL becomeFirstResponder (id self, SEL)
    {
        if (auto* owner = getOwner (self))
            owner->viewFocusGain();

        return YES;
    }

    static BOOL resignFirstResponder (id self, SEL)
    {
        if (auto* owner = getOwner (self))
            owner->viewFocusLoss();

        return YES;
    }

    static BOOL acceptsFirstResponder (id self, SEL)
    {
        auto* owner = getOwner (self);
        return owner != nullptr && owner->canBecomeKeyWindow();
    }

    //==============================================================================
    static NSDragOperation draggingEntered (id self, SEL s, id<NSDraggingInfo> sender)
    {
        return draggingUpdated (self, s, sender);
    }

    static NSDragOperation draggingUpdated (id self, SEL, id<NSDraggingInfo> sender)
    {
        if (auto* owner = getOwner (self))
            if (owner->sendDragCallback (0, sender))
                return NSDragOperationGeneric;

        return NSDragOperationNone;
    }

    static void draggingEnded (id self, SEL s, id<NSDraggingInfo> sender)
    {
        draggingExited (self, s, sender);
    }

    static void draggingExited (id self, SEL, id<NSDraggingInfo> sender)
    {
        if (auto* owner = getOwner (self))
            owner->sendDragCallback (1, sender);
    }

    static BOOL prepareForDragOperation (id, SEL, id<NSDraggingInfo>)
    {
        return YES;
    }

    static BOOL performDragOperation (id self, SEL, id<NSDraggingInfo> sender)
    {
        auto* owner = getOwner (self);
        return owner != nullptr && owner->sendDragCallback (2, sender);
    }

    static void concludeDragOperation (id, SEL, id<NSDraggingInfo>) {}
};

//==============================================================================
struct JuceNSWindowClass   : public ObjCClass<NSWindow>
{
    JuceNSWindowClass()  : ObjCClass<NSWindow> ("JUCEWindow_")
    {
        addIvar<NSViewComponentPeer*> ("owner");

        addMethod (@selector (canBecomeKeyWindow),                  canBecomeKeyWindow,        "c@:");
        addMethod (@selector (canBecomeMainWindow),                 canBecomeMainWindow,       "c@:");
        addMethod (@selector (becomeKeyWindow),                     becomeKeyWindow,           "v@:");
        addMethod (@selector (windowShouldClose:),                  windowShouldClose,         "c@:@");
        addMethod (@selector (constrainFrameRect:toScreen:),        constrainFrameRect,        @encode (NSRect), "@:",  @encode (NSRect), "@");
        addMethod (@selector (windowWillResize:toSize:),            windowWillResize,          @encode (NSSize), "@:@", @encode (NSSize));
        addMethod (@selector (windowDidExitFullScreen:),            windowDidExitFullScreen,   "v@:@");
        addMethod (@selector (windowWillEnterFullScreen:),          windowWillEnterFullScreen, "v@:@");
        addMethod (@selector (zoom:),                               zoom,                      "v@:@");
        addMethod (@selector (windowWillMove:),                     windowWillMove,            "v@:@");
        addMethod (@selector (windowWillStartLiveResize:),          windowWillStartLiveResize, "v@:@");
        addMethod (@selector (windowDidEndLiveResize:),             windowDidEndLiveResize,    "v@:@");
        addMethod (@selector (window:shouldPopUpDocumentPathMenu:), shouldPopUpPathMenu, "B@:@", @encode (NSMenu*));

        addMethod (@selector (window:shouldDragDocumentWithEvent:from:withPasteboard:),
                   shouldAllowIconDrag, "B@:@", @encode (NSEvent*), @encode (NSPoint), @encode (NSPasteboard*));

        addProtocol (@protocol (NSWindowDelegate));

        registerClass();
    }

private:
    static NSViewComponentPeer* getOwner (id self)
    {
        return getIvar<NSViewComponentPeer*> (self, "owner");
    }

    //==============================================================================
    static BOOL canBecomeKeyWindow (id self, SEL)
    {
        auto* owner = getOwner (self);

        return owner != nullptr
                && owner->canBecomeKeyWindow()
                && ! owner->isBlockedByModalComponent();
    }

    static BOOL canBecomeMainWindow (id self, SEL)
    {
        auto* owner = getOwner (self);

        return owner != nullptr
                && owner->canBecomeMainWindow()
                && ! owner->isBlockedByModalComponent();
    }

    static void becomeKeyWindow (id self, SEL)
    {
        sendSuperclassMessage (self, @selector (becomeKeyWindow));

        if (auto* owner = getOwner (self))
        {
            if (owner->canBecomeKeyWindow())
            {
                owner->becomeKeyWindow();
                return;
            }

            // this fixes a bug causing hidden windows to sometimes become visible when the app regains focus
            if (! owner->getComponent().isVisible())
                [(NSWindow*) self orderOut: nil];
        }
    }

    static BOOL windowShouldClose (id self, SEL, id /*window*/)
    {
        auto* owner = getOwner (self);
        return owner == nullptr || owner->windowShouldClose();
    }

    static NSRect constrainFrameRect (id self, SEL, NSRect frameRect, NSScreen*)
    {
        if (auto* owner = getOwner (self))
            frameRect = owner->constrainRect (frameRect);

        return frameRect;
    }

    static NSSize windowWillResize (id self, SEL, NSWindow*, NSSize proposedFrameSize)
    {
        auto* owner = getOwner (self);

        if (owner == nullptr || owner->isZooming)
            return proposedFrameSize;

        NSRect frameRect = [(NSWindow*) self frame];
        frameRect.origin.y -= proposedFrameSize.height - frameRect.size.height;
        frameRect.size = proposedFrameSize;

        frameRect = owner->constrainRect (frameRect);

        if (owner->hasNativeTitleBar())
            owner->sendModalInputAttemptIfBlocked();

        return frameRect.size;
    }

    static void windowDidExitFullScreen (id self, SEL, NSNotification*)
    {
        if (auto* owner = getOwner (self))
            owner->resetWindowPresentation();
    }

    static void windowWillEnterFullScreen (id self, SEL, NSNotification*)
    {
        if (SystemStats::getOperatingSystemType() <= SystemStats::MacOSX_10_9)
            return;

        if (auto* owner = getOwner (self))
            if (owner->hasNativeTitleBar() && (owner->getStyleFlags() & ComponentPeer::windowIsResizable) == 0)
                [owner->window setStyleMask: NSWindowStyleMaskBorderless];
    }

    static void zoom (id self, SEL, id sender)
    {
        if (auto* owner = getOwner (self))
        {
            owner->isZooming = true;
            objc_super s = { self, [NSWindow class] };
            getMsgSendSuperFn() (&s, @selector (zoom:), sender);
            owner->isZooming = false;

            owner->redirectMovedOrResized();
        }
    }

    static void windowWillMove (id self, SEL, NSNotification*)
    {
        if (auto* owner = getOwner (self))
            if (owner->hasNativeTitleBar())
                owner->sendModalInputAttemptIfBlocked();
    }

    static void windowWillStartLiveResize (id self, SEL, NSNotification*)
    {
        if (auto* owner = getOwner (self))
            owner->liveResizingStart();
    }

    static void windowDidEndLiveResize (id self, SEL, NSNotification*)
    {
        if (auto* owner = getOwner (self))
            owner->liveResizingEnd();
    }

    static bool shouldPopUpPathMenu (id self, SEL, id /*window*/, NSMenu*)
    {
        if (auto* owner = getOwner (self))
            return owner->windowRepresentsFile;

        return false;
    }

    static bool shouldAllowIconDrag (id self, SEL, id /*window*/, NSEvent*, NSPoint, NSPasteboard*)
    {
        if (auto* owner = getOwner (self))
            return owner->windowRepresentsFile;

        return false;
    }
};

NSView* NSViewComponentPeer::createViewInstance()
{
    static JuceNSViewClass cls;
    return cls.createInstance();
}

NSWindow* NSViewComponentPeer::createWindowInstance()
{
    static JuceNSWindowClass cls;
    return cls.createInstance();
}


//==============================================================================
ComponentPeer* NSViewComponentPeer::currentlyFocusedPeer = nullptr;
Array<int> NSViewComponentPeer::keysCurrentlyDown;

//==============================================================================
bool KeyPress::isKeyCurrentlyDown (int keyCode)
{
    if (NSViewComponentPeer::keysCurrentlyDown.contains (keyCode))
        return true;

    if (keyCode >= 'A' && keyCode <= 'Z'
         && NSViewComponentPeer::keysCurrentlyDown.contains ((int) CharacterFunctions::toLowerCase ((juce_wchar) keyCode)))
        return true;

    if (keyCode >= 'a' && keyCode <= 'z'
         && NSViewComponentPeer::keysCurrentlyDown.contains ((int) CharacterFunctions::toUpperCase ((juce_wchar) keyCode)))
        return true;

    return false;
}

//==============================================================================
bool MouseInputSource::SourceList::addSource()
{
    if (sources.size() == 0)
    {
        addSource (0, MouseInputSource::InputSourceType::mouse);
        return true;
    }

    return false;
}

bool MouseInputSource::SourceList::canUseTouch()
{
    return false;
}

//==============================================================================
void Desktop::setKioskComponent (Component* kioskComp, bool shouldBeEnabled, bool allowMenusAndBars)
{
    auto* peer = dynamic_cast<NSViewComponentPeer*> (kioskComp->getPeer());
    jassert (peer != nullptr); // (this should have been checked by the caller)

    if (peer->hasNativeTitleBar()
          && [peer->window respondsToSelector: @selector (toggleFullScreen:)])
    {
        if (shouldBeEnabled && ! allowMenusAndBars)
            [NSApp setPresentationOptions: NSApplicationPresentationHideDock | NSApplicationPresentationHideMenuBar];
        else if (! shouldBeEnabled)
            [NSApp setPresentationOptions: NSApplicationPresentationDefault];

        [peer->window performSelector: @selector (toggleFullScreen:) withObject: nil];
    }
    else
    {
        if (shouldBeEnabled)
        {
            if (peer->hasNativeTitleBar())
                [peer->window setStyleMask: NSWindowStyleMaskBorderless];

            [NSApp setPresentationOptions: (allowMenusAndBars ? (NSApplicationPresentationAutoHideDock | NSApplicationPresentationAutoHideMenuBar)
                                                              : (NSApplicationPresentationHideDock | NSApplicationPresentationHideMenuBar))];

            kioskComp->setBounds (getDisplays().findDisplayForRect (kioskComp->getScreenBounds()).totalArea);
            peer->becomeKeyWindow();
        }
        else
        {
            peer->resetWindowPresentation();
        }
    }
}

void Desktop::allowedOrientationsChanged() {}

//==============================================================================
ComponentPeer* Component::createNewPeer (int styleFlags, void* windowToAttachTo)
{
    return new NSViewComponentPeer (*this, styleFlags, (NSView*) windowToAttachTo);
}

//==============================================================================
const int KeyPress::spaceKey        = ' ';
const int KeyPress::returnKey       = 0x0d;
const int KeyPress::escapeKey       = 0x1b;
const int KeyPress::backspaceKey    = 0x7f;
const int KeyPress::leftKey         = NSLeftArrowFunctionKey;
const int KeyPress::rightKey        = NSRightArrowFunctionKey;
const int KeyPress::upKey           = NSUpArrowFunctionKey;
const int KeyPress::downKey         = NSDownArrowFunctionKey;
const int KeyPress::pageUpKey       = NSPageUpFunctionKey;
const int KeyPress::pageDownKey     = NSPageDownFunctionKey;
const int KeyPress::endKey          = NSEndFunctionKey;
const int KeyPress::homeKey         = NSHomeFunctionKey;
const int KeyPress::deleteKey       = NSDeleteFunctionKey;
const int KeyPress::insertKey       = -1;
const int KeyPress::tabKey          = 9;
const int KeyPress::F1Key           = NSF1FunctionKey;
const int KeyPress::F2Key           = NSF2FunctionKey;
const int KeyPress::F3Key           = NSF3FunctionKey;
const int KeyPress::F4Key           = NSF4FunctionKey;
const int KeyPress::F5Key           = NSF5FunctionKey;
const int KeyPress::F6Key           = NSF6FunctionKey;
const int KeyPress::F7Key           = NSF7FunctionKey;
const int KeyPress::F8Key           = NSF8FunctionKey;
const int KeyPress::F9Key           = NSF9FunctionKey;
const int KeyPress::F10Key          = NSF10FunctionKey;
const int KeyPress::F11Key          = NSF11FunctionKey;
const int KeyPress::F12Key          = NSF12FunctionKey;
const int KeyPress::F13Key          = NSF13FunctionKey;
const int KeyPress::F14Key          = NSF14FunctionKey;
const int KeyPress::F15Key          = NSF15FunctionKey;
const int KeyPress::F16Key          = NSF16FunctionKey;
const int KeyPress::F17Key          = NSF17FunctionKey;
const int KeyPress::F18Key          = NSF18FunctionKey;
const int KeyPress::F19Key          = NSF19FunctionKey;
const int KeyPress::F20Key          = NSF20FunctionKey;
const int KeyPress::F21Key          = NSF21FunctionKey;
const int KeyPress::F22Key          = NSF22FunctionKey;
const int KeyPress::F23Key          = NSF23FunctionKey;
const int KeyPress::F24Key          = NSF24FunctionKey;
const int KeyPress::F25Key          = NSF25FunctionKey;
const int KeyPress::F26Key          = NSF26FunctionKey;
const int KeyPress::F27Key          = NSF27FunctionKey;
const int KeyPress::F28Key          = NSF28FunctionKey;
const int KeyPress::F29Key          = NSF29FunctionKey;
const int KeyPress::F30Key          = NSF30FunctionKey;
const int KeyPress::F31Key          = NSF31FunctionKey;
const int KeyPress::F32Key          = NSF32FunctionKey;
const int KeyPress::F33Key          = NSF33FunctionKey;
const int KeyPress::F34Key          = NSF34FunctionKey;
const int KeyPress::F35Key          = NSF35FunctionKey;

const int KeyPress::numberPad0      = 0x30020;
const int KeyPress::numberPad1      = 0x30021;
const int KeyPress::numberPad2      = 0x30022;
const int KeyPress::numberPad3      = 0x30023;
const int KeyPress::numberPad4      = 0x30024;
const int KeyPress::numberPad5      = 0x30025;
const int KeyPress::numberPad6      = 0x30026;
const int KeyPress::numberPad7      = 0x30027;
const int KeyPress::numberPad8      = 0x30028;
const int KeyPress::numberPad9      = 0x30029;
const int KeyPress::numberPadAdd            = 0x3002a;
const int KeyPress::numberPadSubtract       = 0x3002b;
const int KeyPress::numberPadMultiply       = 0x3002c;
const int KeyPress::numberPadDivide         = 0x3002d;
const int KeyPress::numberPadSeparator      = 0x3002e;
const int KeyPress::numberPadDecimalPoint   = 0x3002f;
const int KeyPress::numberPadEquals         = 0x30030;
const int KeyPress::numberPadDelete         = 0x30031;
const int KeyPress::playKey         = 0x30000;
const int KeyPress::stopKey         = 0x30001;
const int KeyPress::fastForwardKey  = 0x30002;
const int KeyPress::rewindKey       = 0x30003;

} // namespace juce