Carla/source/modules/juce_gui_basics/native/juce_win32_Windowing.cpp

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

   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 JUCE_MODULE_AVAILABLE_juce_audio_plugin_client
 #include <juce_audio_plugin_client/AAX/juce_AAX_Modifier_Injector.h>
#endif

#if JUCE_WIN_PER_MONITOR_DPI_AWARE && JUCE_MODULE_AVAILABLE_juce_gui_extra
 #include <juce_gui_extra/embedding/juce_ScopedDPIAwarenessDisabler.h>
#endif

namespace juce
{

JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wcast-function-type")

#undef GetSystemMetrics // multimon overrides this for some reason and causes a mess..

// these are in the windows SDK, but need to be repeated here for GCC..
#ifndef GET_APPCOMMAND_LPARAM
 #define GET_APPCOMMAND_LPARAM(lParam)     ((short) (HIWORD (lParam) & ~FAPPCOMMAND_MASK))

 #define FAPPCOMMAND_MASK                  0xF000
 #define APPCOMMAND_MEDIA_NEXTTRACK        11
 #define APPCOMMAND_MEDIA_PREVIOUSTRACK    12
 #define APPCOMMAND_MEDIA_STOP             13
 #define APPCOMMAND_MEDIA_PLAY_PAUSE       14
#endif

#ifndef WM_APPCOMMAND
 #define WM_APPCOMMAND                     0x0319
#endif

void juce_repeatLastProcessPriority();
bool juce_isRunningInWine();

using CheckEventBlockedByModalComps = bool (*) (const MSG&);
extern CheckEventBlockedByModalComps isEventBlockedByModalComps;

static bool shouldDeactivateTitleBar = true;

void* getUser32Function (const char*);

//==============================================================================
#ifndef WM_TOUCH
 enum
 {
     WM_TOUCH         = 0x0240,
     TOUCHEVENTF_MOVE = 0x0001,
     TOUCHEVENTF_DOWN = 0x0002,
     TOUCHEVENTF_UP   = 0x0004
 };

 typedef HANDLE HTOUCHINPUT;
 typedef HANDLE HGESTUREINFO;

 struct TOUCHINPUT
 {
     LONG         x;
     LONG         y;
     HANDLE       hSource;
     DWORD        dwID;
     DWORD        dwFlags;
     DWORD        dwMask;
     DWORD        dwTime;
     ULONG_PTR    dwExtraInfo;
     DWORD        cxContact;
     DWORD        cyContact;
 };

 struct GESTUREINFO
 {
     UINT         cbSize;
     DWORD        dwFlags;
     DWORD        dwID;
     HWND         hwndTarget;
     POINTS       ptsLocation;
     DWORD        dwInstanceID;
     DWORD        dwSequenceID;
     ULONGLONG    ullArguments;
     UINT         cbExtraArgs;
 };
#endif

#ifndef WM_NCPOINTERUPDATE
 enum
 {
     WM_NCPOINTERUPDATE       = 0x241,
     WM_NCPOINTERDOWN         = 0x242,
     WM_NCPOINTERUP           = 0x243,
     WM_POINTERUPDATE         = 0x245,
     WM_POINTERDOWN           = 0x246,
     WM_POINTERUP             = 0x247,
     WM_POINTERENTER          = 0x249,
     WM_POINTERLEAVE          = 0x24A,
     WM_POINTERACTIVATE       = 0x24B,
     WM_POINTERCAPTURECHANGED = 0x24C,
     WM_TOUCHHITTESTING       = 0x24D,
     WM_POINTERWHEEL          = 0x24E,
     WM_POINTERHWHEEL         = 0x24F,
     WM_POINTERHITTEST        = 0x250
 };

 enum
 {
     PT_TOUCH = 0x00000002,
     PT_PEN   = 0x00000003
 };

 enum POINTER_BUTTON_CHANGE_TYPE
 {
     POINTER_CHANGE_NONE,
     POINTER_CHANGE_FIRSTBUTTON_DOWN,
     POINTER_CHANGE_FIRSTBUTTON_UP,
     POINTER_CHANGE_SECONDBUTTON_DOWN,
     POINTER_CHANGE_SECONDBUTTON_UP,
     POINTER_CHANGE_THIRDBUTTON_DOWN,
     POINTER_CHANGE_THIRDBUTTON_UP,
     POINTER_CHANGE_FOURTHBUTTON_DOWN,
     POINTER_CHANGE_FOURTHBUTTON_UP,
     POINTER_CHANGE_FIFTHBUTTON_DOWN,
     POINTER_CHANGE_FIFTHBUTTON_UP
 };

 enum
 {
     PEN_MASK_NONE      = 0x00000000,
     PEN_MASK_PRESSURE  = 0x00000001,
     PEN_MASK_ROTATION  = 0x00000002,
     PEN_MASK_TILT_X    = 0x00000004,
     PEN_MASK_TILT_Y    = 0x00000008
 };

 enum
 {
     TOUCH_MASK_NONE        = 0x00000000,
     TOUCH_MASK_CONTACTAREA = 0x00000001,
     TOUCH_MASK_ORIENTATION = 0x00000002,
     TOUCH_MASK_PRESSURE    = 0x00000004
 };

 enum
 {
     POINTER_FLAG_NONE           = 0x00000000,
     POINTER_FLAG_NEW            = 0x00000001,
     POINTER_FLAG_INRANGE        = 0x00000002,
     POINTER_FLAG_INCONTACT      = 0x00000004,
     POINTER_FLAG_FIRSTBUTTON    = 0x00000010,
     POINTER_FLAG_SECONDBUTTON   = 0x00000020,
     POINTER_FLAG_THIRDBUTTON    = 0x00000040,
     POINTER_FLAG_FOURTHBUTTON   = 0x00000080,
     POINTER_FLAG_FIFTHBUTTON    = 0x00000100,
     POINTER_FLAG_PRIMARY        = 0x00002000,
     POINTER_FLAG_CONFIDENCE     = 0x00004000,
     POINTER_FLAG_CANCELED       = 0x00008000,
     POINTER_FLAG_DOWN           = 0x00010000,
     POINTER_FLAG_UPDATE         = 0x00020000,
     POINTER_FLAG_UP             = 0x00040000,
     POINTER_FLAG_WHEEL          = 0x00080000,
     POINTER_FLAG_HWHEEL         = 0x00100000,
     POINTER_FLAG_CAPTURECHANGED = 0x00200000,
     POINTER_FLAG_HASTRANSFORM   = 0x00400000
 };

 typedef DWORD  POINTER_INPUT_TYPE;
 typedef UINT32 POINTER_FLAGS;
 typedef UINT32 PEN_FLAGS;
 typedef UINT32 PEN_MASK;
 typedef UINT32 TOUCH_FLAGS;
 typedef UINT32 TOUCH_MASK;

 struct POINTER_INFO
 {
     POINTER_INPUT_TYPE         pointerType;
     UINT32                     pointerId;
     UINT32                     frameId;
     POINTER_FLAGS              pointerFlags;
     HANDLE                     sourceDevice;
     HWND                       hwndTarget;
     POINT                      ptPixelLocation;
     POINT                      ptHimetricLocation;
     POINT                      ptPixelLocationRaw;
     POINT                      ptHimetricLocationRaw;
     DWORD                      dwTime;
     UINT32                     historyCount;
     INT32                      InputData;
     DWORD                      dwKeyStates;
     UINT64                     PerformanceCount;
     POINTER_BUTTON_CHANGE_TYPE ButtonChangeType;
 };

 struct POINTER_TOUCH_INFO
 {
     POINTER_INFO    pointerInfo;
     TOUCH_FLAGS     touchFlags;
     TOUCH_MASK      touchMask;
     RECT            rcContact;
     RECT            rcContactRaw;
     UINT32          orientation;
     UINT32          pressure;
 };

 struct POINTER_PEN_INFO
 {
     POINTER_INFO    pointerInfo;
     PEN_FLAGS       penFlags;
     PEN_MASK        penMask;
     UINT32          pressure;
     UINT32          rotation;
     INT32           tiltX;
     INT32           tiltY;
 };

 #define GET_POINTERID_WPARAM(wParam)    (LOWORD(wParam))
#endif

#ifndef MONITOR_DPI_TYPE
 enum Monitor_DPI_Type
 {
     MDT_Effective_DPI = 0,
     MDT_Angular_DPI   = 1,
     MDT_Raw_DPI       = 2,
     MDT_Default       = MDT_Effective_DPI
 };
#endif

#ifndef DPI_AWARENESS
 enum DPI_Awareness
 {
     DPI_Awareness_Invalid           = -1,
     DPI_Awareness_Unaware           = 0,
     DPI_Awareness_System_Aware      = 1,
     DPI_Awareness_Per_Monitor_Aware = 2
 };
#endif

#ifndef USER_DEFAULT_SCREEN_DPI
 #define USER_DEFAULT_SCREEN_DPI 96
#endif

#ifndef _DPI_AWARENESS_CONTEXTS_
 typedef HANDLE DPI_AWARENESS_CONTEXT;

 #define DPI_AWARENESS_CONTEXT_UNAWARE              ((DPI_AWARENESS_CONTEXT) - 1)
 #define DPI_AWARENESS_CONTEXT_SYSTEM_AWARE         ((DPI_AWARENESS_CONTEXT) - 2)
 #define DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE    ((DPI_AWARENESS_CONTEXT) - 3)
 #define DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 ((DPI_AWARENESS_CONTEXT) - 4)
#endif

// Some versions of the Windows 10 SDK define _DPI_AWARENESS_CONTEXTS_ but not
// DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2
#ifndef DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2
 #define DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 ((DPI_AWARENESS_CONTEXT) - 4)
#endif

//==============================================================================
using RegisterTouchWindowFunc    = BOOL (WINAPI*) (HWND, ULONG);
using GetTouchInputInfoFunc      = BOOL (WINAPI*) (HTOUCHINPUT, UINT, TOUCHINPUT*, int);
using CloseTouchInputHandleFunc  = BOOL (WINAPI*) (HTOUCHINPUT);
using GetGestureInfoFunc         = BOOL (WINAPI*) (HGESTUREINFO, GESTUREINFO*);

static RegisterTouchWindowFunc   registerTouchWindow   = nullptr;
static GetTouchInputInfoFunc     getTouchInputInfo     = nullptr;
static CloseTouchInputHandleFunc closeTouchInputHandle = nullptr;
static GetGestureInfoFunc        getGestureInfo        = nullptr;

static bool hasCheckedForMultiTouch = false;

static bool canUseMultiTouch()
{
    if (registerTouchWindow == nullptr && ! hasCheckedForMultiTouch)
    {
        hasCheckedForMultiTouch = true;

        registerTouchWindow   = (RegisterTouchWindowFunc)   getUser32Function ("RegisterTouchWindow");
        getTouchInputInfo     = (GetTouchInputInfoFunc)     getUser32Function ("GetTouchInputInfo");
        closeTouchInputHandle = (CloseTouchInputHandleFunc) getUser32Function ("CloseTouchInputHandle");
        getGestureInfo        = (GetGestureInfoFunc)        getUser32Function ("GetGestureInfo");
    }

    return registerTouchWindow != nullptr;
}

//==============================================================================
using GetPointerTypeFunc       =  BOOL (WINAPI*) (UINT32, POINTER_INPUT_TYPE*);
using GetPointerTouchInfoFunc  =  BOOL (WINAPI*) (UINT32, POINTER_TOUCH_INFO*);
using GetPointerPenInfoFunc    =  BOOL (WINAPI*) (UINT32, POINTER_PEN_INFO*);

static GetPointerTypeFunc      getPointerTypeFunction = nullptr;
static GetPointerTouchInfoFunc getPointerTouchInfo    = nullptr;
static GetPointerPenInfoFunc   getPointerPenInfo      = nullptr;

static bool canUsePointerAPI = false;

static void checkForPointerAPI()
{
    getPointerTypeFunction = (GetPointerTypeFunc)      getUser32Function ("GetPointerType");
    getPointerTouchInfo    = (GetPointerTouchInfoFunc) getUser32Function ("GetPointerTouchInfo");
    getPointerPenInfo      = (GetPointerPenInfoFunc)   getUser32Function ("GetPointerPenInfo");

    canUsePointerAPI = (getPointerTypeFunction != nullptr
                     && getPointerTouchInfo    != nullptr
                     && getPointerPenInfo      != nullptr);
}

//==============================================================================
using SetProcessDPIAwareFunc                   = BOOL                  (WINAPI*) ();
using SetProcessDPIAwarenessContextFunc        = BOOL                  (WINAPI*) (DPI_AWARENESS_CONTEXT);
using SetProcessDPIAwarenessFunc               = BOOL                  (WINAPI*) (DPI_Awareness);
using SetThreadDPIAwarenessContextFunc         = DPI_AWARENESS_CONTEXT (WINAPI*) (DPI_AWARENESS_CONTEXT);
using GetDPIForWindowFunc                      = UINT                  (WINAPI*) (HWND);
using GetDPIForMonitorFunc                     = HRESULT               (WINAPI*) (HMONITOR, Monitor_DPI_Type, UINT*, UINT*);
using GetProcessDPIAwarenessFunc               = HRESULT               (WINAPI*) (HANDLE, DPI_Awareness*);
using GetWindowDPIAwarenessContextFunc         = DPI_AWARENESS_CONTEXT (WINAPI*) (HWND);
using GetThreadDPIAwarenessContextFunc         = DPI_AWARENESS_CONTEXT (WINAPI*) ();
using GetAwarenessFromDpiAwarenessContextFunc  = DPI_Awareness         (WINAPI*) (DPI_AWARENESS_CONTEXT);
using EnableNonClientDPIScalingFunc            = BOOL                  (WINAPI*) (HWND);

static SetProcessDPIAwareFunc                  setProcessDPIAware                  = nullptr;
static SetProcessDPIAwarenessContextFunc       setProcessDPIAwarenessContext       = nullptr;
static SetProcessDPIAwarenessFunc              setProcessDPIAwareness              = nullptr;
static SetThreadDPIAwarenessContextFunc        setThreadDPIAwarenessContext        = nullptr;
static GetDPIForMonitorFunc                    getDPIForMonitor                    = nullptr;
static GetDPIForWindowFunc                     getDPIForWindow                     = nullptr;
static GetProcessDPIAwarenessFunc              getProcessDPIAwareness              = nullptr;
static GetWindowDPIAwarenessContextFunc        getWindowDPIAwarenessContext        = nullptr;
static GetThreadDPIAwarenessContextFunc        getThreadDPIAwarenessContext        = nullptr;
static GetAwarenessFromDpiAwarenessContextFunc getAwarenessFromDPIAwarenessContext = nullptr;
static EnableNonClientDPIScalingFunc           enableNonClientDPIScaling           = nullptr;

static bool hasCheckedForDPIAwareness = false;

static void setDPIAwareness()
{
    if (hasCheckedForDPIAwareness)
        return;

    hasCheckedForDPIAwareness = true;

    if (! JUCEApplicationBase::isStandaloneApp())
        return;

    HMODULE shcoreModule = GetModuleHandleA ("SHCore.dll");

    if (shcoreModule != nullptr)
    {
        getDPIForMonitor = (GetDPIForMonitorFunc) GetProcAddress (shcoreModule, "GetDpiForMonitor");

       #if JUCE_WIN_PER_MONITOR_DPI_AWARE
        getDPIForWindow                     = (GetDPIForWindowFunc) getUser32Function ("GetDpiForWindow");
        getProcessDPIAwareness              = (GetProcessDPIAwarenessFunc) GetProcAddress (shcoreModule, "GetProcessDpiAwareness");
        getWindowDPIAwarenessContext        = (GetWindowDPIAwarenessContextFunc) getUser32Function ("GetWindowDpiAwarenessContext");
        setThreadDPIAwarenessContext        = (SetThreadDPIAwarenessContextFunc) getUser32Function ("SetThreadDpiAwarenessContext");
        getThreadDPIAwarenessContext        = (GetThreadDPIAwarenessContextFunc) getUser32Function ("GetThreadDpiAwarenessContext");
        getAwarenessFromDPIAwarenessContext = (GetAwarenessFromDpiAwarenessContextFunc) getUser32Function ("GetAwarenessFromDpiAwarenessContext");
        setProcessDPIAwareness              = (SetProcessDPIAwarenessFunc) GetProcAddress (shcoreModule, "SetProcessDpiAwareness");
        setProcessDPIAwarenessContext       = (SetProcessDPIAwarenessContextFunc) getUser32Function ("SetProcessDpiAwarenessContext");

        if (setProcessDPIAwarenessContext != nullptr
            && SUCCEEDED (setProcessDPIAwarenessContext (DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2)))
            return;

        enableNonClientDPIScaling = (EnableNonClientDPIScalingFunc) getUser32Function ("EnableNonClientDpiScaling");

        if (setProcessDPIAwareness != nullptr && enableNonClientDPIScaling != nullptr
            && SUCCEEDED (setProcessDPIAwareness (DPI_Awareness::DPI_Awareness_Per_Monitor_Aware)))
            return;
       #endif

        if (setProcessDPIAwareness == nullptr)
            setProcessDPIAwareness = (SetProcessDPIAwarenessFunc) GetProcAddress (shcoreModule, "SetProcessDpiAwareness");

        if (setProcessDPIAwareness != nullptr && getDPIForMonitor != nullptr
             && SUCCEEDED (setProcessDPIAwareness (DPI_Awareness::DPI_Awareness_System_Aware)))
            return;
    }

    // fallback for pre Windows 8.1 - equivalent to Process_System_DPI_Aware
    setProcessDPIAware = (SetProcessDPIAwareFunc) getUser32Function ("SetProcessDPIAware");

    if (setProcessDPIAware != nullptr)
        setProcessDPIAware();
}

static bool isPerMonitorDPIAwareProcess()
{
   #if JUCE_WIN_PER_MONITOR_DPI_AWARE
    static bool dpiAware = []() -> bool
    {
        setDPIAwareness();

        if (getProcessDPIAwareness == nullptr)
            return false;

        DPI_Awareness context;
        getProcessDPIAwareness (nullptr, &context);

        return context == DPI_Awareness::DPI_Awareness_Per_Monitor_Aware;
    }();

    return dpiAware;
   #else
    return false;
   #endif
}

static bool isPerMonitorDPIAwareWindow (HWND h)
{
   #if JUCE_WIN_PER_MONITOR_DPI_AWARE
    jassert (h != nullptr);

    setDPIAwareness();

    if (getWindowDPIAwarenessContext != nullptr && getAwarenessFromDPIAwarenessContext != nullptr)
        return getAwarenessFromDPIAwarenessContext (getWindowDPIAwarenessContext (h)) == DPI_Awareness::DPI_Awareness_Per_Monitor_Aware;

    return isPerMonitorDPIAwareProcess();
   #else
    ignoreUnused (h);
    return false;
   #endif
}

static bool isPerMonitorDPIAwareThread()
{
   #if JUCE_WIN_PER_MONITOR_DPI_AWARE
    setDPIAwareness();

    if (getThreadDPIAwarenessContext != nullptr && getAwarenessFromDPIAwarenessContext != nullptr)
        return getAwarenessFromDPIAwarenessContext (getThreadDPIAwarenessContext()) == DPI_Awareness::DPI_Awareness_Per_Monitor_Aware;

    return isPerMonitorDPIAwareProcess();
   #else
    return false;
   #endif
}

static double getGlobalDPI()
{
    setDPIAwareness();

    HDC dc = GetDC (nullptr);
    auto dpi = (GetDeviceCaps (dc, LOGPIXELSX) + GetDeviceCaps (dc, LOGPIXELSY)) / 2.0;
    ReleaseDC (nullptr, dc);
    return dpi;
}

//==============================================================================
#if JUCE_WIN_PER_MONITOR_DPI_AWARE && JUCE_MODULE_AVAILABLE_juce_gui_extra
 ScopedDPIAwarenessDisabler::ScopedDPIAwarenessDisabler()
 {
     if (! isPerMonitorDPIAwareThread())
         return;

     if (setThreadDPIAwarenessContext != nullptr)
         previousContext = setThreadDPIAwarenessContext (DPI_AWARENESS_CONTEXT_UNAWARE);
 }

 ScopedDPIAwarenessDisabler::~ScopedDPIAwarenessDisabler()
 {
     if (previousContext != nullptr)
         setThreadDPIAwarenessContext ((DPI_AWARENESS_CONTEXT) previousContext);
 }
#endif

//==============================================================================
using SettingChangeCallbackFunc = void (*)(void);
extern SettingChangeCallbackFunc settingChangeCallback;

//==============================================================================
static Rectangle<int> rectangleFromRECT (const RECT& r) noexcept    { return { r.left, r.top, r.right - r.left, r.bottom - r.top }; }
static RECT RECTFromRectangle (const Rectangle<int>& r) noexcept    { return { r.getX(), r.getY(), r.getRight(), r.getBottom() }; }

static Point<int> pointFromPOINT (const POINT& p) noexcept          { return { p.x, p.y }; }
static POINT POINTFromPoint (const Point<int>& p) noexcept          { return { p.x, p.y }; }

//==============================================================================
static const Displays::Display* getCurrentDisplayFromScaleFactor (HWND hwnd);

static Rectangle<int> convertPhysicalScreenRectangleToLogical (const Rectangle<int>& r, HWND h) noexcept
{
    if (isPerMonitorDPIAwareWindow (h))
        return Desktop::getInstance().getDisplays().physicalToLogical (r, getCurrentDisplayFromScaleFactor (h));

    return r;
}

static Rectangle<int> convertLogicalScreenRectangleToPhysical (const Rectangle<int>& r, HWND h) noexcept
{
    if (isPerMonitorDPIAwareWindow (h))
        return Desktop::getInstance().getDisplays().logicalToPhysical (r, getCurrentDisplayFromScaleFactor (h));

    return r;
}

static Point<int> convertPhysicalScreenPointToLogical (const Point<int>& p, HWND h) noexcept
{
    if (isPerMonitorDPIAwareWindow (h))
        return Desktop::getInstance().getDisplays().physicalToLogical (p, getCurrentDisplayFromScaleFactor (h));

    return p;
}

JUCE_API double getScaleFactorForWindow (HWND h)
{
    // NB. Using a local function here because we need to call this method from the plug-in wrappers
    // which don't load the DPI-awareness functions on startup
    static GetDPIForWindowFunc localGetDPIForWindow = nullptr;

    static bool hasChecked = false;

    if (! hasChecked)
    {
        hasChecked = true;

        if (localGetDPIForWindow == nullptr)
            localGetDPIForWindow = (GetDPIForWindowFunc) getUser32Function ("GetDpiForWindow");
    }

    if (localGetDPIForWindow != nullptr)
        return (double) localGetDPIForWindow (h) / USER_DEFAULT_SCREEN_DPI;

    return 1.0;
 }

#if JUCE_WIN_PER_MONITOR_DPI_AWARE
 JUCE_API void setThreadDPIAwarenessForWindow (HWND nativeWindow)
 {
     // NB. Using local functions here because we need to call this method from the plug-in wrappers
     // which don't load the DPI-awareness functions on startup
     static SetThreadDPIAwarenessContextFunc        localSetThreadDPIAwarenessContext        = nullptr;
     static GetWindowDPIAwarenessContextFunc        localGetWindowDPIAwarenessContext        = nullptr;
     static GetThreadDPIAwarenessContextFunc        localGetThreadDPIAwarenessContext        = nullptr;
     static GetAwarenessFromDpiAwarenessContextFunc localGetAwarenessFromDPIAwarenessContext = nullptr;

     static bool hasChecked = false;
     static bool loadedOK = false;

     if (! hasChecked)
     {
         hasChecked = true;

         localSetThreadDPIAwarenessContext        = (SetThreadDPIAwarenessContextFunc) getUser32Function ("SetThreadDpiAwarenessContext");
         localGetWindowDPIAwarenessContext        = (GetWindowDPIAwarenessContextFunc) getUser32Function ("GetWindowDpiAwarenessContext");
         localGetThreadDPIAwarenessContext        = (GetThreadDPIAwarenessContextFunc) getUser32Function ("GetThreadDpiAwarenessContext");
         localGetAwarenessFromDPIAwarenessContext = (GetAwarenessFromDpiAwarenessContextFunc) getUser32Function ("GetAwarenessFromDpiAwarenessContext");

         loadedOK = (localSetThreadDPIAwarenessContext != nullptr && localGetWindowDPIAwarenessContext != nullptr
                    && localGetThreadDPIAwarenessContext != nullptr && localGetAwarenessFromDPIAwarenessContext != nullptr);
     }

     if (loadedOK)
     {
         auto dpiAwareWindow = localGetAwarenessFromDPIAwarenessContext (localGetWindowDPIAwarenessContext (nativeWindow)) == DPI_Awareness::DPI_Awareness_Per_Monitor_Aware;
         auto dpiAwareThread = localGetAwarenessFromDPIAwarenessContext (localGetThreadDPIAwarenessContext()) == DPI_Awareness::DPI_Awareness_Per_Monitor_Aware;

         if (dpiAwareWindow && ! dpiAwareThread)
             localSetThreadDPIAwarenessContext (DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE);
         else if (! dpiAwareWindow && dpiAwareThread)
             localSetThreadDPIAwarenessContext (DPI_AWARENESS_CONTEXT_UNAWARE);
     }
 }
#endif

//==============================================================================
static void setWindowPos (HWND hwnd, Rectangle<int> bounds, UINT flags, bool adjustTopLeft = false)
{
    if (isPerMonitorDPIAwareWindow (hwnd))
    {
        if (adjustTopLeft)
            bounds = convertLogicalScreenRectangleToPhysical (bounds, hwnd)
                      .withPosition (Desktop::getInstance().getDisplays().logicalToPhysical (bounds.getTopLeft()));
        else
            bounds = convertLogicalScreenRectangleToPhysical (bounds, hwnd);
    }

    SetWindowPos (hwnd, nullptr, bounds.getX(), bounds.getY(), bounds.getWidth(), bounds.getHeight(), flags);
}

static RECT getWindowRect (HWND hwnd)
{
   #if JUCE_WIN_PER_MONITOR_DPI_AWARE
    setThreadDPIAwarenessForWindow (hwnd);
   #endif

    RECT r;
    GetWindowRect (hwnd, &r);
    return r;
}

static void setWindowZOrder (HWND hwnd, HWND insertAfter)
{
    SetWindowPos (hwnd, insertAfter, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOSENDCHANGING);
}

//==============================================================================
double Desktop::getDefaultMasterScale()
{
    if (! JUCEApplicationBase::isStandaloneApp()
       #if JUCE_WIN_PER_MONITOR_DPI_AWARE
        || isPerMonitorDPIAwareProcess()
       #endif
        )
    {
        return 1.0;
    }

    return getGlobalDPI() / USER_DEFAULT_SCREEN_DPI;
}

bool Desktop::canUseSemiTransparentWindows() noexcept { return true; }

Desktop::DisplayOrientation Desktop::getCurrentOrientation() const
{
    return upright;
}

int64 getMouseEventTime()
{
    static int64 eventTimeOffset = 0;
    static LONG lastMessageTime = 0;
    const LONG thisMessageTime = GetMessageTime();

    if (thisMessageTime < lastMessageTime || lastMessageTime == 0)
    {
        lastMessageTime = thisMessageTime;
        eventTimeOffset = Time::currentTimeMillis() - thisMessageTime;
    }

    return eventTimeOffset + thisMessageTime;
}

//==============================================================================
const int extendedKeyModifier               = 0x10000;

const int KeyPress::spaceKey                = VK_SPACE;
const int KeyPress::returnKey               = VK_RETURN;
const int KeyPress::escapeKey               = VK_ESCAPE;
const int KeyPress::backspaceKey            = VK_BACK;
const int KeyPress::deleteKey               = VK_DELETE         | extendedKeyModifier;
const int KeyPress::insertKey               = VK_INSERT         | extendedKeyModifier;
const int KeyPress::tabKey                  = VK_TAB;
const int KeyPress::leftKey                 = VK_LEFT           | extendedKeyModifier;
const int KeyPress::rightKey                = VK_RIGHT          | extendedKeyModifier;
const int KeyPress::upKey                   = VK_UP             | extendedKeyModifier;
const int KeyPress::downKey                 = VK_DOWN           | extendedKeyModifier;
const int KeyPress::homeKey                 = VK_HOME           | extendedKeyModifier;
const int KeyPress::endKey                  = VK_END            | extendedKeyModifier;
const int KeyPress::pageUpKey               = VK_PRIOR          | extendedKeyModifier;
const int KeyPress::pageDownKey             = VK_NEXT           | extendedKeyModifier;
const int KeyPress::F1Key                   = VK_F1             | extendedKeyModifier;
const int KeyPress::F2Key                   = VK_F2             | extendedKeyModifier;
const int KeyPress::F3Key                   = VK_F3             | extendedKeyModifier;
const int KeyPress::F4Key                   = VK_F4             | extendedKeyModifier;
const int KeyPress::F5Key                   = VK_F5             | extendedKeyModifier;
const int KeyPress::F6Key                   = VK_F6             | extendedKeyModifier;
const int KeyPress::F7Key                   = VK_F7             | extendedKeyModifier;
const int KeyPress::F8Key                   = VK_F8             | extendedKeyModifier;
const int KeyPress::F9Key                   = VK_F9             | extendedKeyModifier;
const int KeyPress::F10Key                  = VK_F10            | extendedKeyModifier;
const int KeyPress::F11Key                  = VK_F11            | extendedKeyModifier;
const int KeyPress::F12Key                  = VK_F12            | extendedKeyModifier;
const int KeyPress::F13Key                  = VK_F13            | extendedKeyModifier;
const int KeyPress::F14Key                  = VK_F14            | extendedKeyModifier;
const int KeyPress::F15Key                  = VK_F15            | extendedKeyModifier;
const int KeyPress::F16Key                  = VK_F16            | extendedKeyModifier;
const int KeyPress::F17Key                  = VK_F17            | extendedKeyModifier;
const int KeyPress::F18Key                  = VK_F18            | extendedKeyModifier;
const int KeyPress::F19Key                  = VK_F19            | extendedKeyModifier;
const int KeyPress::F20Key                  = VK_F20            | extendedKeyModifier;
const int KeyPress::F21Key                  = VK_F21            | extendedKeyModifier;
const int KeyPress::F22Key                  = VK_F22            | extendedKeyModifier;
const int KeyPress::F23Key                  = VK_F23            | extendedKeyModifier;
const int KeyPress::F24Key                  = VK_F24            | extendedKeyModifier;
const int KeyPress::F25Key                  = 0x31000;          // Windows doesn't support F-keys 25 or higher
const int KeyPress::F26Key                  = 0x31001;
const int KeyPress::F27Key                  = 0x31002;
const int KeyPress::F28Key                  = 0x31003;
const int KeyPress::F29Key                  = 0x31004;
const int KeyPress::F30Key                  = 0x31005;
const int KeyPress::F31Key                  = 0x31006;
const int KeyPress::F32Key                  = 0x31007;
const int KeyPress::F33Key                  = 0x31008;
const int KeyPress::F34Key                  = 0x31009;
const int KeyPress::F35Key                  = 0x3100a;

const int KeyPress::numberPad0              = VK_NUMPAD0        | extendedKeyModifier;
const int KeyPress::numberPad1              = VK_NUMPAD1        | extendedKeyModifier;
const int KeyPress::numberPad2              = VK_NUMPAD2        | extendedKeyModifier;
const int KeyPress::numberPad3              = VK_NUMPAD3        | extendedKeyModifier;
const int KeyPress::numberPad4              = VK_NUMPAD4        | extendedKeyModifier;
const int KeyPress::numberPad5              = VK_NUMPAD5        | extendedKeyModifier;
const int KeyPress::numberPad6              = VK_NUMPAD6        | extendedKeyModifier;
const int KeyPress::numberPad7              = VK_NUMPAD7        | extendedKeyModifier;
const int KeyPress::numberPad8              = VK_NUMPAD8        | extendedKeyModifier;
const int KeyPress::numberPad9              = VK_NUMPAD9        | extendedKeyModifier;
const int KeyPress::numberPadAdd            = VK_ADD            | extendedKeyModifier;
const int KeyPress::numberPadSubtract       = VK_SUBTRACT       | extendedKeyModifier;
const int KeyPress::numberPadMultiply       = VK_MULTIPLY       | extendedKeyModifier;
const int KeyPress::numberPadDivide         = VK_DIVIDE         | extendedKeyModifier;
const int KeyPress::numberPadSeparator      = VK_SEPARATOR      | extendedKeyModifier;
const int KeyPress::numberPadDecimalPoint   = VK_DECIMAL        | extendedKeyModifier;
const int KeyPress::numberPadEquals         = 0x92 /*VK_OEM_NEC_EQUAL*/  | extendedKeyModifier;
const int KeyPress::numberPadDelete         = VK_DELETE         | extendedKeyModifier;
const int KeyPress::playKey                 = 0x30000;
const int KeyPress::stopKey                 = 0x30001;
const int KeyPress::fastForwardKey          = 0x30002;
const int KeyPress::rewindKey               = 0x30003;


//==============================================================================
class WindowsBitmapImage  : public ImagePixelData
{
public:
    WindowsBitmapImage (const Image::PixelFormat format,
                        const int w, const int h, const bool clearImage)
        : ImagePixelData (format, w, h)
    {
        jassert (format == Image::RGB || format == Image::ARGB);

        static bool alwaysUse32Bits = isGraphicsCard32Bit(); // NB: for 32-bit cards, it's faster to use a 32-bit image.

        pixelStride = (alwaysUse32Bits || format == Image::ARGB) ? 4 : 3;
        lineStride = -((w * pixelStride + 3) & ~3);

        zerostruct (bitmapInfo);
        bitmapInfo.bV4Size     = sizeof (BITMAPV4HEADER);
        bitmapInfo.bV4Width    = w;
        bitmapInfo.bV4Height   = h;
        bitmapInfo.bV4Planes   = 1;
        bitmapInfo.bV4CSType   = 1;
        bitmapInfo.bV4BitCount = (unsigned short) (pixelStride * 8);

        if (format == Image::ARGB)
        {
            bitmapInfo.bV4AlphaMask      = 0xff000000;
            bitmapInfo.bV4RedMask        = 0xff0000;
            bitmapInfo.bV4GreenMask      = 0xff00;
            bitmapInfo.bV4BlueMask       = 0xff;
            bitmapInfo.bV4V4Compression  = BI_BITFIELDS;
        }
        else
        {
            bitmapInfo.bV4V4Compression  = BI_RGB;
        }

        HDC dc = GetDC (nullptr);
        hdc = CreateCompatibleDC (dc);
        ReleaseDC (nullptr, dc);

        SetMapMode (hdc, MM_TEXT);

        hBitmap = CreateDIBSection (hdc, (BITMAPINFO*) &(bitmapInfo), DIB_RGB_COLORS,
                                    (void**) &bitmapData, nullptr, 0);

        previousBitmap = SelectObject (hdc, hBitmap);

        if (format == Image::ARGB && clearImage)
            zeromem (bitmapData, (size_t) std::abs (h * lineStride));

        imageData = bitmapData - (lineStride * (h - 1));
    }

    ~WindowsBitmapImage()
    {
        SelectObject (hdc, previousBitmap); // Selecting the previous bitmap before deleting the DC avoids a warning in BoundsChecker
        DeleteDC (hdc);
        DeleteObject (hBitmap);
    }

    std::unique_ptr<ImageType> createType() const override    { return std::make_unique<NativeImageType>(); }

    std::unique_ptr<LowLevelGraphicsContext> createLowLevelContext() override
    {
        sendDataChangeMessage();
        return std::make_unique<LowLevelGraphicsSoftwareRenderer> (Image (this));
    }

    void initialiseBitmapData (Image::BitmapData& bitmap, int x, int y, Image::BitmapData::ReadWriteMode mode) override
    {
        bitmap.data = imageData + x * pixelStride + y * lineStride;
        bitmap.pixelFormat = pixelFormat;
        bitmap.lineStride = lineStride;
        bitmap.pixelStride = pixelStride;

        if (mode != Image::BitmapData::readOnly)
            sendDataChangeMessage();
    }

    ImagePixelData::Ptr clone() override
    {
        auto im = new WindowsBitmapImage (pixelFormat, width, height, false);

        for (int i = 0; i < height; ++i)
            memcpy (im->imageData + i * lineStride, imageData + i * lineStride, (size_t) lineStride);

        return im;
    }

    void blitToWindow (HWND hwnd, HDC dc, bool transparent, int x, int y, uint8 updateLayeredWindowAlpha) noexcept
    {
        SetMapMode (dc, MM_TEXT);

        if (transparent)
        {
            auto windowBounds = getWindowRect (hwnd);

            POINT p = { -x, -y };
            POINT pos = { windowBounds.left, windowBounds.top };
            SIZE size = { windowBounds.right - windowBounds.left,
                          windowBounds.bottom - windowBounds.top };

            BLENDFUNCTION bf;
            bf.AlphaFormat = 1 /*AC_SRC_ALPHA*/;
            bf.BlendFlags = 0;
            bf.BlendOp = AC_SRC_OVER;
            bf.SourceConstantAlpha = updateLayeredWindowAlpha;

            UpdateLayeredWindow (hwnd, nullptr, &pos, &size, hdc, &p, 0, &bf, 2 /*ULW_ALPHA*/);
        }
        else
        {
            StretchDIBits (dc,
                           x, y, width, height,
                           0, 0, width, height,
                           bitmapData, (const BITMAPINFO*) &bitmapInfo,
                           DIB_RGB_COLORS, SRCCOPY);
        }
    }

    HBITMAP hBitmap;
    HGDIOBJ previousBitmap;
    BITMAPV4HEADER bitmapInfo;
    HDC hdc;
    uint8* bitmapData;
    int pixelStride, lineStride;
    uint8* imageData;

private:
    static bool isGraphicsCard32Bit()
    {
        auto dc = GetDC (nullptr);
        auto bitsPerPixel = GetDeviceCaps (dc, BITSPIXEL);
        ReleaseDC (nullptr, dc);
        return bitsPerPixel > 24;
    }

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (WindowsBitmapImage)
};

//==============================================================================
Image createSnapshotOfNativeWindow (void*);
Image createSnapshotOfNativeWindow (void* nativeWindowHandle)
{
    auto hwnd = (HWND) nativeWindowHandle;

    auto r = convertPhysicalScreenRectangleToLogical (rectangleFromRECT (getWindowRect (hwnd)), hwnd);
    const int w = r.getWidth();
    const int h = r.getHeight();

    auto nativeBitmap = new WindowsBitmapImage (Image::RGB, w, h, true);
    Image bitmap (nativeBitmap);

    HDC dc = GetDC (hwnd);

    if (isPerMonitorDPIAwareProcess())
    {
        auto scale = getScaleFactorForWindow (hwnd);
        auto prevStretchMode = SetStretchBltMode (nativeBitmap->hdc, HALFTONE);
        SetBrushOrgEx (nativeBitmap->hdc, 0, 0, NULL);

        StretchBlt (nativeBitmap->hdc, 0, 0, w, h,
                    dc, 0, 0, roundToInt (w * scale), roundToInt (h * scale),
                    SRCCOPY);

        SetStretchBltMode (nativeBitmap->hdc, prevStretchMode);
    }
    else
    {
        BitBlt (nativeBitmap->hdc, 0, 0, w, h, dc, 0, 0, SRCCOPY);
    }

    ReleaseDC (hwnd, dc);

    return SoftwareImageType().convert (bitmap);
}

//==============================================================================
namespace IconConverters
{
    Image createImageFromHICON (HICON icon)
    {
        if (icon == nullptr)
            return {};

        struct ScopedICONINFO   : public ICONINFO
        {
            ScopedICONINFO()
            {
                hbmColor = nullptr;
                hbmMask = nullptr;
            }

            ~ScopedICONINFO()
            {
                if (hbmColor != nullptr)
                    ::DeleteObject (hbmColor);

                if (hbmMask != nullptr)
                    ::DeleteObject (hbmMask);
            }
        };

        ScopedICONINFO info;

        if (! SUCCEEDED (::GetIconInfo (icon, &info)))
            return {};

        BITMAP bm;

        if (! (::GetObject (info.hbmColor, sizeof (BITMAP), &bm)
               && bm.bmWidth > 0 && bm.bmHeight > 0))
            return {};

        if (auto* tempDC = ::GetDC (nullptr))
        {
            if (auto* dc = ::CreateCompatibleDC (tempDC))
            {
                BITMAPV5HEADER header = {};
                header.bV5Size = sizeof (BITMAPV5HEADER);
                header.bV5Width = bm.bmWidth;
                header.bV5Height = -bm.bmHeight;
                header.bV5Planes = 1;
                header.bV5Compression = BI_RGB;
                header.bV5BitCount = 32;
                header.bV5RedMask = 0x00FF0000;
                header.bV5GreenMask = 0x0000FF00;
                header.bV5BlueMask = 0x000000FF;
                header.bV5AlphaMask = 0xFF000000;
                header.bV5CSType = LCS_WINDOWS_COLOR_SPACE;
                header.bV5Intent = LCS_GM_IMAGES;

                uint32* bitmapImageData = nullptr;

                if (auto* dib = ::CreateDIBSection (tempDC, (BITMAPINFO*) &header, DIB_RGB_COLORS,
                                                    (void**) &bitmapImageData, nullptr, 0))
                {
                    auto oldObject = ::SelectObject (dc, dib);

                    auto numPixels = bm.bmWidth * bm.bmHeight;
                    auto numColourComponents = (size_t) numPixels * 4;

                    // Windows icon data comes as two layers, an XOR mask which contains the bulk
                    // of the image data and an AND mask which provides the transparency. Annoyingly
                    // the XOR mask can also contain an alpha channel, in which case the transparency
                    // mask should not be applied, but there's no way to find out a priori if the XOR
                    // mask contains an alpha channel.

                    HeapBlock<bool> opacityMask (numPixels);
                    memset (bitmapImageData, 0, numColourComponents);
                    ::DrawIconEx (dc, 0, 0, icon, bm.bmWidth, bm.bmHeight, 0, nullptr, DI_MASK);

                    for (int i = 0; i < numPixels; ++i)
                        opacityMask[i] = (bitmapImageData[i] == 0);

                    Image result = Image (Image::ARGB, bm.bmWidth, bm.bmHeight, true);
                    Image::BitmapData imageData (result, Image::BitmapData::readWrite);

                    memset (bitmapImageData, 0, numColourComponents);
                    ::DrawIconEx (dc, 0, 0, icon, bm.bmWidth, bm.bmHeight, 0, nullptr, DI_NORMAL);
                    memcpy (imageData.data, bitmapImageData, numColourComponents);

                    auto imageHasAlphaChannel = [&imageData, numPixels]()
                    {
                        for (int i = 0; i < numPixels; ++i)
                            if (imageData.data[i * 4] != 0)
                                return true;

                        return false;
                    };

                    if (! imageHasAlphaChannel())
                        for (int i = 0; i < numPixels; ++i)
                            imageData.data[i * 4] = opacityMask[i] ? 0xff : 0x00;

                    ::SelectObject (dc, oldObject);
                    ::DeleteObject(dib);
                    ::DeleteDC (dc);
                    ::ReleaseDC (nullptr, tempDC);

                    return result;
                }

                ::DeleteDC (dc);
            }

            ::ReleaseDC (nullptr, tempDC);
        }

        return {};
    }

    HICON createHICONFromImage (const Image& image, const BOOL isIcon, int hotspotX, int hotspotY)
    {
        auto nativeBitmap = new WindowsBitmapImage (Image::ARGB, image.getWidth(), image.getHeight(), true);
        Image bitmap (nativeBitmap);

        {
            Graphics g (bitmap);
            g.drawImageAt (image, 0, 0);
        }

        auto mask = CreateBitmap (image.getWidth(), image.getHeight(), 1, 1, nullptr);

        ICONINFO info;
        info.fIcon = isIcon;
        info.xHotspot = (DWORD) hotspotX;
        info.yHotspot = (DWORD) hotspotY;
        info.hbmMask = mask;
        info.hbmColor = nativeBitmap->hBitmap;

        auto hi = CreateIconIndirect (&info);
        DeleteObject (mask);
        return hi;
    }
}

//==============================================================================
JUCE_COMCLASS (ITipInvocation, "37c994e7-432b-4834-a2f7-dce1f13b834b")  : public IUnknown
{
    static CLSID getCLSID() noexcept   { return { 0x4ce576fa, 0x83dc, 0x4f88, { 0x95, 0x1c, 0x9d, 0x07, 0x82, 0xb4, 0xe3, 0x76 } }; }

    virtual HRESULT STDMETHODCALLTYPE Toggle (HWND) = 0;
};

struct OnScreenKeyboard   : public DeletedAtShutdown,
                            private Timer
{
    void activate()
    {
        shouldBeActive = true;
        startTimer (10);
    }

    void deactivate()
    {
        shouldBeActive = false;
        startTimer (10);
    }

    JUCE_DECLARE_SINGLETON_SINGLETHREADED (OnScreenKeyboard, false)

private:
    OnScreenKeyboard()
    {
        tipInvocation.CoCreateInstance (ITipInvocation::getCLSID(), CLSCTX_INPROC_HANDLER | CLSCTX_LOCAL_SERVER);
    }

    ~OnScreenKeyboard()
    {
        clearSingletonInstance();
    }

    void timerCallback() override
    {
        stopTimer();

        if (reentrant || tipInvocation == nullptr)
            return;

        const ScopedValueSetter<bool> setter (reentrant, true, false);

        auto isActive = isKeyboardVisible();

        if (isActive != shouldBeActive)
        {
            if (! isActive)
            {
                tipInvocation->Toggle (GetDesktopWindow());
            }
            else
            {
                if (auto hwnd = FindWindow (L"IPTip_Main_Window", NULL))
                    PostMessage (hwnd, WM_SYSCOMMAND, (int) SC_CLOSE, 0);
            }
        }
    }

    bool isVisible()
    {
        if (auto hwnd = FindWindowEx (NULL, NULL, L"ApplicationFrameWindow", NULL))
            return FindWindowEx (hwnd, NULL, L"Windows.UI.Core.CoreWindow", L"Microsoft Text Input Application") != NULL;

        return false;
    }

    bool isVisibleLegacy()
    {
        if (auto hwnd = FindWindow (L"IPTip_Main_Window", NULL))
        {
            auto style = GetWindowLong (hwnd, GWL_STYLE);
            return (style & WS_DISABLED) == 0 && (style & WS_VISIBLE) != 0;
        }

        return false;
    }

    bool isKeyboardVisible()
    {
        if (isVisible())
            return true;

        // isVisible() may fail on Win10 versions < 1709 so try the old method too
        return isVisibleLegacy();
    }

    bool shouldBeActive = false, reentrant = false;
    ComSmartPtr<ITipInvocation> tipInvocation;
};

JUCE_IMPLEMENT_SINGLETON (OnScreenKeyboard)

//==============================================================================
struct HSTRING_PRIVATE;
typedef HSTRING_PRIVATE* HSTRING;

struct IInspectable : public IUnknown
{
    virtual HRESULT STDMETHODCALLTYPE GetIids (ULONG* ,IID**) = 0;
    virtual HRESULT STDMETHODCALLTYPE GetRuntimeClassName (HSTRING*) = 0;
    virtual HRESULT STDMETHODCALLTYPE GetTrustLevel (void*) = 0;
};

JUCE_COMCLASS (IUIViewSettingsInterop, "3694dbf9-8f68-44be-8ff5-195c98ede8a6")  : public IInspectable
{
    virtual HRESULT STDMETHODCALLTYPE GetForWindow (HWND, REFIID, void**) = 0;
};

JUCE_COMCLASS (IUIViewSettings, "c63657f6-8850-470d-88f8-455e16ea2c26")  : public IInspectable
{
    enum UserInteractionMode
    {
        Mouse = 0,
        Touch = 1
    };

    virtual HRESULT STDMETHODCALLTYPE GetUserInteractionMode (UserInteractionMode*) = 0;
};


struct UWPUIViewSettings
{
    UWPUIViewSettings()
    {
        ComBaseModule dll (L"api-ms-win-core-winrt-l1-1-0");

        if (dll.h != nullptr)
        {
            roInitialize           = (RoInitializeFuncPtr)           ::GetProcAddress (dll.h, "RoInitialize");
            roGetActivationFactory = (RoGetActivationFactoryFuncPtr) ::GetProcAddress (dll.h, "RoGetActivationFactory");
            createHString          = (WindowsCreateStringFuncPtr)    ::GetProcAddress (dll.h, "WindowsCreateString");
            deleteHString          = (WindowsDeleteStringFuncPtr)    ::GetProcAddress (dll.h, "WindowsDeleteString");

            if (roInitialize == nullptr || roGetActivationFactory == nullptr
                 || createHString == nullptr || deleteHString == nullptr)
                return;

            auto status = roInitialize (1);

            if (status != S_OK && status != S_FALSE && (unsigned) status != 0x80010106L)
                return;

            LPCWSTR uwpClassName = L"Windows.UI.ViewManagement.UIViewSettings";
            HSTRING uwpClassId;

            if (createHString (uwpClassName, (::UINT32) wcslen (uwpClassName), &uwpClassId) != S_OK
                 || uwpClassId == nullptr)
                return;

            status = roGetActivationFactory (uwpClassId, __uuidof (IUIViewSettingsInterop),
                                             (void**) viewSettingsInterop.resetAndGetPointerAddress());
            deleteHString (uwpClassId);

            if (status != S_OK || viewSettingsInterop == nullptr)
                return;

            // move dll into member var
            comBaseDLL = std::move (dll);
        }
    }

    bool isTabletModeActivatedForWindow (::HWND hWnd) const
    {
        if (viewSettingsInterop == nullptr)
            return false;

        ComSmartPtr<IUIViewSettings> viewSettings;

        if (viewSettingsInterop->GetForWindow (hWnd, __uuidof (IUIViewSettings),
                                               (void**) viewSettings.resetAndGetPointerAddress()) == S_OK
             && viewSettings != nullptr)
        {
            IUIViewSettings::UserInteractionMode mode;

            if (viewSettings->GetUserInteractionMode (&mode) == S_OK)
                return mode == IUIViewSettings::Touch;
        }

        return false;
    }

private:
    //==============================================================================
    struct ComBaseModule
    {
        ComBaseModule() {}
        ComBaseModule (LPCWSTR libraryName) : h (::LoadLibrary (libraryName)) {}
        ComBaseModule (ComBaseModule&& o) : h (o.h) { o.h = nullptr; }
        ~ComBaseModule() { release(); }

        void release() { if (h != nullptr) ::FreeLibrary (h); h = nullptr; }
        ComBaseModule& operator= (ComBaseModule&& o) { release(); h = o.h; o.h = nullptr; return *this; }

        HMODULE h = {};
    };

    using RoInitializeFuncPtr           = HRESULT (WINAPI*) (int);
    using RoGetActivationFactoryFuncPtr = HRESULT (WINAPI*) (HSTRING, REFIID, void**);
    using WindowsCreateStringFuncPtr    = HRESULT (WINAPI*) (LPCWSTR,UINT32, HSTRING*);
    using WindowsDeleteStringFuncPtr    = HRESULT (WINAPI*) (HSTRING);

    ComBaseModule comBaseDLL;
    ComSmartPtr<IUIViewSettingsInterop> viewSettingsInterop;

    RoInitializeFuncPtr roInitialize;
    RoGetActivationFactoryFuncPtr roGetActivationFactory;
    WindowsCreateStringFuncPtr createHString;
    WindowsDeleteStringFuncPtr deleteHString;
};

//==============================================================================
class HWNDComponentPeer  : public ComponentPeer,
                           private Timer
                          #if JUCE_MODULE_AVAILABLE_juce_audio_plugin_client
                           , public ModifierKeyReceiver
                          #endif
{
public:
    enum RenderingEngineType
    {
        softwareRenderingEngine = 0,
        direct2DRenderingEngine
    };

    //==============================================================================
    HWNDComponentPeer (Component& comp, int windowStyleFlags, HWND parent, bool nonRepainting)
        : ComponentPeer (comp, windowStyleFlags),
          dontRepaint (nonRepainting),
          parentToAddTo (parent),
          currentRenderingEngine (softwareRenderingEngine)
    {
        callFunctionIfNotLocked (&createWindowCallback, this);

        setTitle (component.getName());
        updateShadower();

        // make sure that the on-screen keyboard code is loaded
        OnScreenKeyboard::getInstance();

        getNativeRealtimeModifiers = []
        {
            HWNDComponentPeer::updateKeyModifiers();

            int mouseMods = 0;
            if (HWNDComponentPeer::isKeyDown (VK_LBUTTON))  mouseMods |= ModifierKeys::leftButtonModifier;
            if (HWNDComponentPeer::isKeyDown (VK_RBUTTON))  mouseMods |= ModifierKeys::rightButtonModifier;
            if (HWNDComponentPeer::isKeyDown (VK_MBUTTON))  mouseMods |= ModifierKeys::middleButtonModifier;

            ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withoutMouseButtons().withFlags (mouseMods);

            return ModifierKeys::currentModifiers;
        };
    }

    ~HWNDComponentPeer()
    {
        shadower = nullptr;
        currentTouches.deleteAllTouchesForPeer (this);

        // do this before the next bit to avoid messages arriving for this window
        // before it's destroyed
        JuceWindowIdentifier::setAsJUCEWindow (hwnd, false);

        callFunctionIfNotLocked (&destroyWindowCallback, (void*) hwnd);

        if (currentWindowIcon != nullptr)
            DestroyIcon (currentWindowIcon);

        if (dropTarget != nullptr)
        {
            dropTarget->peerIsDeleted = true;
            dropTarget->Release();
            dropTarget = nullptr;
        }

       #if JUCE_DIRECT2D
        direct2DContext = nullptr;
       #endif
    }

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

    void setVisible (bool shouldBeVisible) override
    {
        ShowWindow (hwnd, shouldBeVisible ? SW_SHOWNA : SW_HIDE);

        if (shouldBeVisible)
            InvalidateRect (hwnd, nullptr, 0);
        else
            lastPaintTime = 0;
    }

    void setTitle (const String& title) override
    {
        // Unfortunately some ancient bits of win32 mean you can only perform this operation from the message thread.
        JUCE_ASSERT_MESSAGE_THREAD

        SetWindowText (hwnd, title.toWideCharPointer());
    }

    void repaintNowIfTransparent()
    {
        if (isUsingUpdateLayeredWindow() && lastPaintTime > 0 && Time::getMillisecondCounter() > lastPaintTime + 30)
            handlePaintMessage();
    }

    void updateBorderSize()
    {
        WINDOWINFO info;
        info.cbSize = sizeof (info);

        if (GetWindowInfo (hwnd, &info))
            windowBorder = BorderSize<int> (roundToInt ((info.rcClient.top    - info.rcWindow.top)    / scaleFactor),
                                            roundToInt ((info.rcClient.left   - info.rcWindow.left)   / scaleFactor),
                                            roundToInt ((info.rcWindow.bottom - info.rcClient.bottom) / scaleFactor),
                                            roundToInt ((info.rcWindow.right  - info.rcClient.right)  / scaleFactor));

       #if JUCE_DIRECT2D
        if (direct2DContext != nullptr)
            direct2DContext->resized();
       #endif
    }

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

        auto newBounds = windowBorder.addedTo (bounds);

        if (isUsingUpdateLayeredWindow())
        {
            if (auto parentHwnd = GetParent (hwnd))
            {
                auto parentRect = convertPhysicalScreenRectangleToLogical (rectangleFromRECT (getWindowRect (parentHwnd)), hwnd);
                newBounds.translate (parentRect.getX(), parentRect.getY());
            }
        }

        auto oldBounds = getBounds();

        const bool hasMoved = (oldBounds.getPosition() != bounds.getPosition());
        const bool hasResized = (oldBounds.getWidth() != bounds.getWidth()
                                  || oldBounds.getHeight() != bounds.getHeight());

        DWORD flags = SWP_NOACTIVATE | SWP_NOZORDER | SWP_NOOWNERZORDER;
        if (! hasMoved)    flags |= SWP_NOMOVE;
        if (! hasResized)  flags |= SWP_NOSIZE;

        setWindowPos (hwnd, newBounds, flags, ! isInDPIChange);

        if (hasResized && isValidPeer (this))
        {
            updateBorderSize();
            repaintNowIfTransparent();
        }
    }

    Rectangle<int> getBounds() const override
    {
        auto bounds = getWindowRect (hwnd);

        if (auto parentH = GetParent (hwnd))
        {
            auto r = getWindowRect (parentH);
            auto localBounds = Rectangle<int>::leftTopRightBottom (bounds.left, bounds.top,
                                                                   bounds.right, bounds.bottom).translated (-r.left, -r.top);

           #if JUCE_WIN_PER_MONITOR_DPI_AWARE
            if (isPerMonitorDPIAwareWindow (hwnd))
                localBounds = (localBounds.toDouble() / getPlatformScaleFactor()).toNearestInt();
           #endif

            return windowBorder.subtractedFrom (localBounds);
        }

        return windowBorder.subtractedFrom (convertPhysicalScreenRectangleToLogical (rectangleFromRECT (bounds), hwnd));
    }

    Point<int> getScreenPosition() const
    {
        auto r = convertPhysicalScreenRectangleToLogical (rectangleFromRECT (getWindowRect (hwnd)), hwnd);

        return { r.getX() + windowBorder.getLeft(),
                 r.getY() + windowBorder.getTop() };
    }

    Point<float> localToGlobal (Point<float> relativePosition) override  { return relativePosition + getScreenPosition().toFloat(); }
    Point<float> globalToLocal (Point<float> screenPosition) override    { return screenPosition   - getScreenPosition().toFloat(); }

    using ComponentPeer::localToGlobal;
    using ComponentPeer::globalToLocal;

    void setAlpha (float newAlpha) override
    {
        auto intAlpha = (uint8) jlimit (0, 255, (int) (newAlpha * 255.0f));

        if (component.isOpaque())
        {
            if (newAlpha < 1.0f)
            {
                SetWindowLong (hwnd, GWL_EXSTYLE, GetWindowLong (hwnd, GWL_EXSTYLE) | WS_EX_LAYERED);
                SetLayeredWindowAttributes (hwnd, RGB (0, 0, 0), intAlpha, LWA_ALPHA);
            }
            else
            {
                SetWindowLong (hwnd, GWL_EXSTYLE, GetWindowLong (hwnd, GWL_EXSTYLE) & ~WS_EX_LAYERED);
                RedrawWindow (hwnd, nullptr, nullptr, RDW_ERASE | RDW_INVALIDATE | RDW_FRAME | RDW_ALLCHILDREN);
            }
        }
        else
        {
            updateLayeredWindowAlpha = intAlpha;
            component.repaint();
        }
    }

    void setMinimised (bool shouldBeMinimised) override
    {
        if (shouldBeMinimised != isMinimised())
            ShowWindow (hwnd, shouldBeMinimised ? SW_MINIMIZE : SW_SHOWNORMAL);
    }

    bool isMinimised() const override
    {
        WINDOWPLACEMENT wp;
        wp.length = sizeof (WINDOWPLACEMENT);
        GetWindowPlacement (hwnd, &wp);

        return wp.showCmd == SW_SHOWMINIMIZED;
    }

    void setFullScreen (bool shouldBeFullScreen) override
    {
        setMinimised (false);

        if (isFullScreen() != shouldBeFullScreen)
        {
            if (constrainer != nullptr)
                constrainer->resizeStart();

            fullScreen = shouldBeFullScreen;
            const WeakReference<Component> deletionChecker (&component);

            if (! fullScreen)
            {
                auto boundsCopy = lastNonFullscreenBounds;

                if (hasTitleBar())
                    ShowWindow (hwnd, SW_SHOWNORMAL);

                if (! boundsCopy.isEmpty())
                    setBounds (ScalingHelpers::scaledScreenPosToUnscaled (component, boundsCopy), false);
            }
            else
            {
                if (hasTitleBar())
                    ShowWindow (hwnd, SW_SHOWMAXIMIZED);
                else
                    SendMessageW (hwnd, WM_SETTINGCHANGE, 0, 0);
            }

            if (deletionChecker != nullptr)
                handleMovedOrResized();

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

    bool isFullScreen() const override
    {
        if (! hasTitleBar())
            return fullScreen;

        WINDOWPLACEMENT wp;
        wp.length = sizeof (wp);
        GetWindowPlacement (hwnd, &wp);

        return wp.showCmd == SW_SHOWMAXIMIZED;
    }

    bool contains (Point<int> localPos, bool trueIfInAChildWindow) const override
    {
        auto r = convertPhysicalScreenRectangleToLogical (rectangleFromRECT (getWindowRect (hwnd)), hwnd);

        if (! r.withZeroOrigin().contains (localPos))
            return false;

        auto globalPos = localPos + getScreenPosition();

       #if JUCE_WIN_PER_MONITOR_DPI_AWARE
        if (isPerMonitorDPIAwareThread() || isPerMonitorDPIAwareWindow (hwnd))
            globalPos = Desktop::getInstance().getDisplays().logicalToPhysical (globalPos);
       #endif

        auto w = WindowFromPoint (POINTFromPoint (globalPos));

        return  w == hwnd || (trueIfInAChildWindow && (IsChild (hwnd, w) != 0));
    }

    BorderSize<int> getFrameSize() const override
    {
        return windowBorder;
    }

    bool setAlwaysOnTop (bool alwaysOnTop) override
    {
        const bool oldDeactivate = shouldDeactivateTitleBar;
        shouldDeactivateTitleBar = ((styleFlags & windowIsTemporary) == 0);

        setWindowZOrder (hwnd, alwaysOnTop ? HWND_TOPMOST : HWND_NOTOPMOST);

        shouldDeactivateTitleBar = oldDeactivate;

        if (shadower != nullptr)
            handleBroughtToFront();

        return true;
    }

    void toFront (bool makeActive) override
    {
        setMinimised (false);

        const bool oldDeactivate = shouldDeactivateTitleBar;
        shouldDeactivateTitleBar = ((styleFlags & windowIsTemporary) == 0);

        callFunctionIfNotLocked (makeActive ? &toFrontCallback1 : &toFrontCallback2, hwnd);

        shouldDeactivateTitleBar = oldDeactivate;

        if (! makeActive)
        {
            // in this case a broughttofront call won't have occurred, so do it now..
            handleBroughtToFront();
        }
    }

    void toBehind (ComponentPeer* other) override
    {
        if (auto* otherPeer = dynamic_cast<HWNDComponentPeer*> (other))
        {
            setMinimised (false);

            // Must be careful not to try to put a topmost window behind a normal one, or Windows
            // promotes the normal one to be topmost!
            if (component.isAlwaysOnTop() == otherPeer->getComponent().isAlwaysOnTop())
                setWindowZOrder (hwnd, otherPeer->hwnd);
            else if (otherPeer->getComponent().isAlwaysOnTop())
                setWindowZOrder (hwnd, HWND_TOP);
        }
        else
        {
            jassertfalse; // wrong type of window?
        }
    }

    bool isFocused() const override
    {
        return callFunctionIfNotLocked (&getFocusCallback, nullptr) == (void*) hwnd;
    }

    void grabFocus() override
    {
        const bool oldDeactivate = shouldDeactivateTitleBar;
        shouldDeactivateTitleBar = ((styleFlags & windowIsTemporary) == 0);

        callFunctionIfNotLocked (&setFocusCallback, hwnd);

        shouldDeactivateTitleBar = oldDeactivate;
    }

    void textInputRequired (Point<int>, TextInputTarget&) override
    {
        if (! hasCreatedCaret)
        {
            hasCreatedCaret = true;
            CreateCaret (hwnd, (HBITMAP) 1, 0, 0);
        }

        ShowCaret (hwnd);
        SetCaretPos (0, 0);

        if (uwpViewSettings.isTabletModeActivatedForWindow (hwnd))
            OnScreenKeyboard::getInstance()->activate();
    }

    void dismissPendingTextInput() override
    {
        imeHandler.handleSetContext (hwnd, false);

        if (uwpViewSettings.isTabletModeActivatedForWindow (hwnd))
            OnScreenKeyboard::getInstance()->deactivate();
    }

    void repaint (const Rectangle<int>& area) override
    {
        auto scale = getPlatformScaleFactor();

       #if JUCE_WIN_PER_MONITOR_DPI_AWARE
        // if the calling thread is DPI-aware but we are invalidating a non-DPI aware window RECT, we actually have to
        // divide the bounds by the scale factor as it will get multiplied for the virtualised paint callback...
        if (isPerMonitorDPIAwareThread() && ! isPerMonitorDPIAwareWindow (hwnd))
            scale = 1.0 / Desktop::getInstance().getDisplays().getMainDisplay().scale;
       #endif

        auto scaled = area.toDouble() * scale;
        auto r = RECTFromRectangle (scaled.getSmallestIntegerContainer());

        InvalidateRect (hwnd, &r, FALSE);
    }

    void performAnyPendingRepaintsNow() override
    {
        if (component.isVisible())
        {
            WeakReference<Component> localRef (&component);
            MSG m;

            if (isUsingUpdateLayeredWindow() || PeekMessage (&m, hwnd, WM_PAINT, WM_PAINT, PM_REMOVE))
                if (localRef != nullptr) // (the PeekMessage call can dispatch messages, which may delete this comp)
                    handlePaintMessage();
        }
    }

    //==============================================================================
    static HWNDComponentPeer* getOwnerOfWindow (HWND h) noexcept
    {
        if (h != nullptr && JuceWindowIdentifier::isJUCEWindow (h))
            return (HWNDComponentPeer*) GetWindowLongPtr (h, 8);

        return nullptr;
    }

    //==============================================================================
    bool isInside (HWND h) const noexcept
    {
        return GetAncestor (hwnd, GA_ROOT) == h;
    }

    //==============================================================================
    static bool isKeyDown (const int key) noexcept  { return (GetAsyncKeyState (key) & 0x8000) != 0; }

    static void updateKeyModifiers() noexcept
    {
        int keyMods = 0;
        if (isKeyDown (VK_SHIFT))   keyMods |= ModifierKeys::shiftModifier;
        if (isKeyDown (VK_CONTROL)) keyMods |= ModifierKeys::ctrlModifier;
        if (isKeyDown (VK_MENU))    keyMods |= ModifierKeys::altModifier;

        // workaround: Windows maps AltGr to left-Ctrl + right-Alt.
        if (isKeyDown (VK_RMENU) && !isKeyDown (VK_RCONTROL))
        {
            keyMods = (keyMods & ~ModifierKeys::ctrlModifier) | ModifierKeys::altModifier;
        }

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

    static void updateModifiersFromWParam (const WPARAM wParam)
    {
        int mouseMods = 0;
        if (wParam & MK_LBUTTON)   mouseMods |= ModifierKeys::leftButtonModifier;
        if (wParam & MK_RBUTTON)   mouseMods |= ModifierKeys::rightButtonModifier;
        if (wParam & MK_MBUTTON)   mouseMods |= ModifierKeys::middleButtonModifier;

        ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withoutMouseButtons().withFlags (mouseMods);
        updateKeyModifiers();
    }

    //==============================================================================
    bool dontRepaint;
    static ModifierKeys modifiersAtLastCallback;

    //==============================================================================
    struct FileDropTarget    : public ComBaseClassHelper<IDropTarget>
    {
        FileDropTarget (HWNDComponentPeer& p)   : peer (p) {}

        JUCE_COMRESULT DragEnter (IDataObject* pDataObject, DWORD grfKeyState, POINTL mousePos, DWORD* pdwEffect) override
        {
            auto hr = updateFileList (pDataObject);

            if (FAILED (hr))
                return hr;

            return DragOver (grfKeyState, mousePos, pdwEffect);
        }

        JUCE_COMRESULT DragLeave() override
        {
            if (peerIsDeleted)
                return S_FALSE;

            peer.handleDragExit (dragInfo);
            return S_OK;
        }

        JUCE_COMRESULT DragOver (DWORD /*grfKeyState*/, POINTL mousePos, DWORD* pdwEffect) override
        {
            if (peerIsDeleted)
                return S_FALSE;

            dragInfo.position = getMousePos (mousePos).roundToInt();
            *pdwEffect = peer.handleDragMove (dragInfo) ? (DWORD) DROPEFFECT_COPY
                                                        : (DWORD) DROPEFFECT_NONE;
            return S_OK;
        }

        JUCE_COMRESULT Drop (IDataObject* pDataObject, DWORD /*grfKeyState*/, POINTL mousePos, DWORD* pdwEffect) override
        {
            auto hr = updateFileList (pDataObject);

            if (FAILED (hr))
                return hr;

            dragInfo.position = getMousePos (mousePos).roundToInt();
            *pdwEffect = peer.handleDragDrop (dragInfo) ? (DWORD) DROPEFFECT_COPY
                                                        : (DWORD) DROPEFFECT_NONE;
            return S_OK;
        }

        HWNDComponentPeer& peer;
        ComponentPeer::DragInfo dragInfo;
        bool peerIsDeleted = false;

    private:
        Point<float> getMousePos (POINTL mousePos) const
        {
            Point<float> screenPos;

           #if JUCE_WIN_PER_MONITOR_DPI_AWARE
            auto h = (HWND) peer.getNativeHandle();

            if (isPerMonitorDPIAwareWindow (h))
                screenPos = convertPhysicalScreenPointToLogical (pointFromPOINT ({ mousePos.x, mousePos.y }), h).toFloat();
            else
           #endif
                screenPos = pointFromPOINT ({ mousePos.x, mousePos.y }).toFloat() / static_cast<float> (getGlobalDPI() / USER_DEFAULT_SCREEN_DPI);

            return peer.getComponent().getLocalPoint (nullptr, screenPos);
        }

        template <typename CharType>
        void parseFileList (const CharType* names, const SIZE_T totalLen)
        {
            for (unsigned int i = 0;;)
            {
                unsigned int len = 0;

                while (i + len < totalLen && names[i + len] != 0)
                    ++len;

                if (len == 0)
                    break;

                dragInfo.files.add (String (names + i, len));
                i += len + 1;
            }
        }

        struct DroppedData
        {
            DroppedData (IDataObject* dataObject, CLIPFORMAT type)
            {
                FORMATETC format = { type, nullptr, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
                STGMEDIUM resetMedium = { TYMED_HGLOBAL, { nullptr }, nullptr };
                medium = resetMedium;

                if (SUCCEEDED (error = dataObject->GetData (&format, &medium)))
                {
                    dataSize = GlobalSize (medium.hGlobal);
                    data = GlobalLock (medium.hGlobal);
                }
            }

            ~DroppedData()
            {
                if (data != nullptr)
                    GlobalUnlock (medium.hGlobal);
            }

            HRESULT error;
            STGMEDIUM medium;
            void* data = {};
            SIZE_T dataSize;
        };

        HRESULT updateFileList (IDataObject* const dataObject)
        {
            if (peerIsDeleted)
                return S_FALSE;

            dragInfo.clear();

            {
                DroppedData fileData (dataObject, CF_HDROP);

                if (SUCCEEDED (fileData.error))
                {
                    auto dropFiles = static_cast<const LPDROPFILES> (fileData.data);
                    const void* const names = addBytesToPointer (dropFiles, sizeof (DROPFILES));

                    if (dropFiles->fWide)
                        parseFileList (static_cast<const WCHAR*> (names), fileData.dataSize);
                    else
                        parseFileList (static_cast<const char*>  (names), fileData.dataSize);

                    return S_OK;
                }
            }

            DroppedData textData (dataObject, CF_UNICODETEXT);

            if (SUCCEEDED (textData.error))
            {
                dragInfo.text = String (CharPointer_UTF16 ((const WCHAR*) textData.data),
                                        CharPointer_UTF16 ((const WCHAR*) addBytesToPointer (textData.data, textData.dataSize)));
                return S_OK;
            }

            return textData.error;
        }

        JUCE_DECLARE_NON_COPYABLE (FileDropTarget)
    };

    static bool offerKeyMessageToJUCEWindow (MSG& m)
    {
        if (m.message == WM_KEYDOWN || m.message == WM_KEYUP)
            if (Component::getCurrentlyFocusedComponent() != nullptr)
                if (auto* h = getOwnerOfWindow (m.hwnd))
                    return m.message == WM_KEYDOWN ? h->doKeyDown (m.wParam)
                                                   : h->doKeyUp (m.wParam);

        return false;
    }

    double getPlatformScaleFactor() const noexcept override
    {
       #if JUCE_WIN_PER_MONITOR_DPI_AWARE
        if (! isPerMonitorDPIAwareWindow (hwnd))
            return 1.0;

        if (auto* parentHWND = GetParent (hwnd))
        {
            if (auto* parentPeer = getOwnerOfWindow (parentHWND))
                return parentPeer->getPlatformScaleFactor();

            if (getDPIForWindow != nullptr)
                return getScaleFactorForWindow (parentHWND);
        }

        return scaleFactor;
       #else
        return 1.0;
       #endif
    }

private:
    HWND hwnd, parentToAddTo;
    std::unique_ptr<DropShadower> shadower;
    RenderingEngineType currentRenderingEngine;
   #if JUCE_DIRECT2D
    std::unique_ptr<Direct2DLowLevelGraphicsContext> direct2DContext;
   #endif
    uint32 lastPaintTime = 0;
    ULONGLONG lastMagnifySize = 0;
    bool fullScreen = false, isDragging = false, isMouseOver = false,
         hasCreatedCaret = false, constrainerIsResizing = false;
    BorderSize<int> windowBorder;
    HICON currentWindowIcon = nullptr;
    FileDropTarget* dropTarget = nullptr;
    uint8 updateLayeredWindowAlpha = 255;
    UWPUIViewSettings uwpViewSettings;
   #if JUCE_MODULE_AVAILABLE_juce_audio_plugin_client
    ModifierKeyProvider* modProvider = nullptr;
   #endif

    double scaleFactor = 1.0;
    bool isInDPIChange = false;

    //==============================================================================
    static MultiTouchMapper<DWORD> currentTouches;

    //==============================================================================
    struct TemporaryImage    : private Timer
    {
        TemporaryImage() {}

        Image& getImage (bool transparent, int w, int h)
        {
            auto format = transparent ? Image::ARGB : Image::RGB;

            if ((! image.isValid()) || image.getWidth() < w || image.getHeight() < h || image.getFormat() != format)
                image = Image (new WindowsBitmapImage (format, (w + 31) & ~31, (h + 31) & ~31, false));

            startTimer (3000);
            return image;
        }

        void timerCallback() override
        {
            stopTimer();
            image = {};
        }

    private:
        Image image;

        JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (TemporaryImage)
    };

    TemporaryImage offscreenImageGenerator;

    //==============================================================================
    class WindowClassHolder    : private DeletedAtShutdown
    {
    public:
        WindowClassHolder()
        {
            // this name has to be different for each app/dll instance because otherwise poor old Windows can
            // get a bit confused (even despite it not being a process-global window class).
            String windowClassName ("JUCE_");
            windowClassName << String::toHexString (Time::currentTimeMillis());

            auto moduleHandle = (HINSTANCE) Process::getCurrentModuleInstanceHandle();

            TCHAR moduleFile[1024] = {};
            GetModuleFileName (moduleHandle, moduleFile, 1024);
            WORD iconNum = 0;

            WNDCLASSEX wcex = {};
            wcex.cbSize         = sizeof (wcex);
            wcex.style          = CS_OWNDC;
            wcex.lpfnWndProc    = (WNDPROC) windowProc;
            wcex.lpszClassName  = windowClassName.toWideCharPointer();
            wcex.cbWndExtra     = 32;
            wcex.hInstance      = moduleHandle;
            wcex.hIcon          = ExtractAssociatedIcon (moduleHandle, moduleFile, &iconNum);
            iconNum = 1;
            wcex.hIconSm        = ExtractAssociatedIcon (moduleHandle, moduleFile, &iconNum);

            atom = RegisterClassEx (&wcex);
            jassert (atom != 0);

            isEventBlockedByModalComps = checkEventBlockedByModalComps;
        }

        ~WindowClassHolder()
        {
            if (ComponentPeer::getNumPeers() == 0)
                UnregisterClass (getWindowClassName(), (HINSTANCE) Process::getCurrentModuleInstanceHandle());

            clearSingletonInstance();
        }

        LPCTSTR getWindowClassName() const noexcept     { return (LPCTSTR) (pointer_sized_uint) atom; }

        JUCE_DECLARE_SINGLETON_SINGLETHREADED_MINIMAL (WindowClassHolder)

    private:
        ATOM atom;

        static bool isHWNDBlockedByModalComponents (HWND h)
        {
            for (int i = Desktop::getInstance().getNumComponents(); --i >= 0;)
                if (auto* c = Desktop::getInstance().getComponent (i))
                    if ((! c->isCurrentlyBlockedByAnotherModalComponent())
                          && IsChild ((HWND) c->getWindowHandle(), h))
                        return false;

            return true;
        }

        static bool checkEventBlockedByModalComps (const MSG& m)
        {
            if (Component::getNumCurrentlyModalComponents() == 0 || JuceWindowIdentifier::isJUCEWindow (m.hwnd))
                return false;

            switch (m.message)
            {
                case WM_MOUSEMOVE:
                case WM_NCMOUSEMOVE:
                case 0x020A: /* WM_MOUSEWHEEL */
                case 0x020E: /* WM_MOUSEHWHEEL */
                case WM_KEYUP:
                case WM_SYSKEYUP:
                case WM_CHAR:
                case WM_APPCOMMAND:
                case WM_LBUTTONUP:
                case WM_MBUTTONUP:
                case WM_RBUTTONUP:
                case WM_MOUSEACTIVATE:
                case WM_NCMOUSEHOVER:
                case WM_MOUSEHOVER:
                case WM_TOUCH:
                case WM_POINTERUPDATE:
                case WM_NCPOINTERUPDATE:
                case WM_POINTERWHEEL:
                case WM_POINTERHWHEEL:
                case WM_POINTERUP:
                case WM_POINTERACTIVATE:
                    return isHWNDBlockedByModalComponents(m.hwnd);
                case WM_NCLBUTTONDOWN:
                case WM_NCLBUTTONDBLCLK:
                case WM_NCRBUTTONDOWN:
                case WM_NCRBUTTONDBLCLK:
                case WM_NCMBUTTONDOWN:
                case WM_NCMBUTTONDBLCLK:
                case WM_LBUTTONDOWN:
                case WM_LBUTTONDBLCLK:
                case WM_MBUTTONDOWN:
                case WM_MBUTTONDBLCLK:
                case WM_RBUTTONDOWN:
                case WM_RBUTTONDBLCLK:
                case WM_KEYDOWN:
                case WM_SYSKEYDOWN:
                case WM_NCPOINTERDOWN:
                case WM_POINTERDOWN:
                    if (isHWNDBlockedByModalComponents (m.hwnd))
                    {
                        if (auto* modal = Component::getCurrentlyModalComponent (0))
                            modal->inputAttemptWhenModal();

                        return true;
                    }
                    break;

                default:
                    break;
            }

            return false;
        }

        JUCE_DECLARE_NON_COPYABLE (WindowClassHolder)
    };

    //==============================================================================
    static void* createWindowCallback (void* userData)
    {
        static_cast<HWNDComponentPeer*> (userData)->createWindow();
        return nullptr;
    }

    void createWindow()
    {
        DWORD exstyle = 0;
        DWORD type = WS_CLIPSIBLINGS | WS_CLIPCHILDREN;

        if (hasTitleBar())
        {
            type |= WS_OVERLAPPED;

            if ((styleFlags & windowHasCloseButton) != 0)
            {
                type |= WS_SYSMENU;
            }
            else
            {
                // annoyingly, windows won't let you have a min/max button without a close button
                jassert ((styleFlags & (windowHasMinimiseButton | windowHasMaximiseButton)) == 0);
            }

            if ((styleFlags & windowIsResizable) != 0)
                type |= WS_THICKFRAME;
        }
        else if (parentToAddTo != nullptr)
        {
            type |= WS_CHILD;
        }
        else
        {
            type |= WS_POPUP | WS_SYSMENU;
        }

        if ((styleFlags & windowAppearsOnTaskbar) == 0)
            exstyle |= WS_EX_TOOLWINDOW;
        else
            exstyle |= WS_EX_APPWINDOW;

        if ((styleFlags & windowHasMinimiseButton) != 0)    type |= WS_MINIMIZEBOX;
        if ((styleFlags & windowHasMaximiseButton) != 0)    type |= WS_MAXIMIZEBOX;
        if ((styleFlags & windowIgnoresMouseClicks) != 0)   exstyle |= WS_EX_TRANSPARENT;
        if ((styleFlags & windowIsSemiTransparent) != 0)    exstyle |= WS_EX_LAYERED;

        hwnd = CreateWindowEx (exstyle, WindowClassHolder::getInstance()->getWindowClassName(),
                               L"", type, 0, 0, 0, 0, parentToAddTo, nullptr,
                               (HINSTANCE) Process::getCurrentModuleInstanceHandle(), nullptr);

        if (hwnd != nullptr)
        {
            SetWindowLongPtr (hwnd, 0, 0);
            SetWindowLongPtr (hwnd, 8, (LONG_PTR) this);
            JuceWindowIdentifier::setAsJUCEWindow (hwnd, true);

            if (dropTarget == nullptr)
            {
                HWNDComponentPeer* peer = nullptr;

                if (dontRepaint)
                    peer = getOwnerOfWindow (parentToAddTo);

                if (peer == nullptr)
                    peer = this;

                dropTarget = new FileDropTarget (*peer);
            }

            RegisterDragDrop (hwnd, dropTarget);

            if (canUseMultiTouch())
                registerTouchWindow (hwnd, 0);

            setDPIAwareness();

           #if JUCE_WIN_PER_MONITOR_DPI_AWARE
            if (isPerMonitorDPIAwareThread())
            {
                auto bounds = component.getBounds();

                if (bounds.isEmpty())
                    scaleFactor = Desktop::getInstance().getDisplays().getMainDisplay().scale;
                else
                    scaleFactor = Desktop::getInstance().getDisplays().findDisplayForRect (bounds).scale;

                scaleFactor /= Desktop::getInstance().getGlobalScaleFactor();
            }
           #endif

            setMessageFilter();
            updateBorderSize();
            checkForPointerAPI();

            // This is needed so that our plugin window gets notified of WM_SETTINGCHANGE messages
            // and can respond to display scale changes
            if (! JUCEApplication::isStandaloneApp())
                settingChangeCallback = forceDisplayUpdate;

            // Calling this function here is (for some reason) necessary to make Windows
            // correctly enable the menu items that we specify in the wm_initmenu message.
            GetSystemMenu (hwnd, false);

            auto alpha = component.getAlpha();
            if (alpha < 1.0f)
                setAlpha (alpha);
        }
        else
        {
            jassertfalse;
        }
    }

    static BOOL CALLBACK revokeChildDragDropCallback (HWND hwnd, LPARAM)    { RevokeDragDrop (hwnd); return TRUE; }

    static void* destroyWindowCallback (void* handle)
    {
        auto hwnd = reinterpret_cast<HWND> (handle);

        if (IsWindow (hwnd))
        {
            RevokeDragDrop (hwnd);

            // NB: we need to do this before DestroyWindow() as child HWNDs will be invalid after
            EnumChildWindows (hwnd, revokeChildDragDropCallback, 0);

            DestroyWindow (hwnd);
        }

        return nullptr;
    }

    static void* toFrontCallback1 (void* h)
    {
        SetForegroundWindow ((HWND) h);
        return nullptr;
    }

    static void* toFrontCallback2 (void* h)
    {
        setWindowZOrder ((HWND) h, HWND_TOP);
        return nullptr;
    }

    static void* setFocusCallback (void* h)
    {
        SetFocus ((HWND) h);
        return nullptr;
    }

    static void* getFocusCallback (void*)
    {
        return GetFocus();
    }

    bool isUsingUpdateLayeredWindow() const
    {
        return ! component.isOpaque();
    }

    bool hasTitleBar() const noexcept        { return (styleFlags & windowHasTitleBar) != 0; }

    void updateShadower()
    {
        if (! component.isCurrentlyModal() && (styleFlags & windowHasDropShadow) != 0
            && ((! hasTitleBar()) || SystemStats::getOperatingSystemType() < SystemStats::WinVista))
        {
            shadower.reset (component.getLookAndFeel().createDropShadowerForComponent (&component));

            if (shadower != nullptr)
                shadower->setOwner (&component);
        }
    }

    void setIcon (const Image& newIcon) override
    {
        if (auto hicon = IconConverters::createHICONFromImage (newIcon, TRUE, 0, 0))
        {
            SendMessage (hwnd, WM_SETICON, ICON_BIG, (LPARAM) hicon);
            SendMessage (hwnd, WM_SETICON, ICON_SMALL, (LPARAM) hicon);

            if (currentWindowIcon != nullptr)
                DestroyIcon (currentWindowIcon);

            currentWindowIcon = hicon;
        }
    }

    void setMessageFilter()
    {
        using ChangeWindowMessageFilterExFunc = BOOL (WINAPI*) (HWND, UINT, DWORD, PVOID);

        if (auto changeMessageFilter = (ChangeWindowMessageFilterExFunc) getUser32Function ("ChangeWindowMessageFilterEx"))
        {
            changeMessageFilter (hwnd, WM_DROPFILES, 1 /*MSGFLT_ALLOW*/, nullptr);
            changeMessageFilter (hwnd, WM_COPYDATA, 1 /*MSGFLT_ALLOW*/, nullptr);
            changeMessageFilter (hwnd, 0x49, 1 /*MSGFLT_ALLOW*/, nullptr);
        }
    }

    struct ChildWindowClippingInfo
    {
        HDC dc;
        HWNDComponentPeer* peer;
        RectangleList<int>* clip;
        Point<int> origin;
        int savedDC;
    };

    static BOOL CALLBACK clipChildWindowCallback (HWND hwnd, LPARAM context)
    {
        if (IsWindowVisible (hwnd))
        {
            auto& info = *(ChildWindowClippingInfo*) context;

            auto parent = GetParent (hwnd);

            if (parent == info.peer->hwnd)
            {
                auto r = getWindowRect (hwnd);
                POINT pos = { r.left, r.top };
                ScreenToClient (GetParent (hwnd), &pos);

                Rectangle<int> clip (pos.x, pos.y,
                                     r.right  - r.left,
                                     r.bottom - r.top);

                info.clip->subtract (clip - info.origin);

                if (info.savedDC == 0)
                    info.savedDC = SaveDC (info.dc);

                ExcludeClipRect (info.dc, clip.getX(), clip.getY(), clip.getRight(), clip.getBottom());
            }
        }

        return TRUE;
    }

    //==============================================================================
    void handlePaintMessage()
    {
       #if JUCE_DIRECT2D
        if (direct2DContext != nullptr)
        {
            RECT r;

            if (GetUpdateRect (hwnd, &r, false))
            {
                direct2DContext->start();
                direct2DContext->clipToRectangle (convertPhysicalScreenRectangleToLogical (rectangleFromRECT (r), hwnd));
                handlePaint (*direct2DContext);
                direct2DContext->end();
                ValidateRect (hwnd, &r);
            }
        }
        else
       #endif
        {
            HRGN rgn = CreateRectRgn (0, 0, 0, 0);
            const int regionType = GetUpdateRgn (hwnd, rgn, false);

            PAINTSTRUCT paintStruct;
            HDC dc = BeginPaint (hwnd, &paintStruct); // Note this can immediately generate a WM_NCPAINT
                                                      // message and become re-entrant, but that's OK

            // if something in a paint handler calls, e.g. a message box, this can become reentrant and
            // corrupt the image it's using to paint into, so do a check here.
            static bool reentrant = false;

            if (! reentrant)
            {
                const ScopedValueSetter<bool> setter (reentrant, true, false);

                if (dontRepaint)
                    component.handleCommandMessage (0); // (this triggers a repaint in the openGL context)
                else
                    performPaint (dc, rgn, regionType, paintStruct);
            }

            DeleteObject (rgn);
            EndPaint (hwnd, &paintStruct);

           #if JUCE_MSVC
            _fpreset(); // because some graphics cards can unmask FP exceptions
           #endif

        }

        lastPaintTime = Time::getMillisecondCounter();
    }

    void performPaint (HDC dc, HRGN rgn, int regionType, PAINTSTRUCT& paintStruct)
    {
        int x = paintStruct.rcPaint.left;
        int y = paintStruct.rcPaint.top;
        int w = paintStruct.rcPaint.right - x;
        int h = paintStruct.rcPaint.bottom - y;

        const bool transparent = isUsingUpdateLayeredWindow();

        if (transparent)
        {
            // it's not possible to have a transparent window with a title bar at the moment!
            jassert (! hasTitleBar());

            auto r = getWindowRect (hwnd);
            x = y = 0;
            w = r.right - r.left;
            h = r.bottom - r.top;
        }

        if (w > 0 && h > 0)
        {
            Image& offscreenImage = offscreenImageGenerator.getImage (transparent, w, h);

            RectangleList<int> contextClip;
            const Rectangle<int> clipBounds (w, h);

            bool needToPaintAll = true;

            if (regionType == COMPLEXREGION && ! transparent)
            {
                HRGN clipRgn = CreateRectRgnIndirect (&paintStruct.rcPaint);
                CombineRgn (rgn, rgn, clipRgn, RGN_AND);
                DeleteObject (clipRgn);

                char rgnData[8192];
                const DWORD res = GetRegionData (rgn, sizeof (rgnData), (RGNDATA*) rgnData);

                if (res > 0 && res <= sizeof (rgnData))
                {
                    const RGNDATAHEADER* const hdr = &(((const RGNDATA*) rgnData)->rdh);

                    if (hdr->iType == RDH_RECTANGLES
                         && hdr->rcBound.right - hdr->rcBound.left >= w
                         && hdr->rcBound.bottom - hdr->rcBound.top >= h)
                    {
                        needToPaintAll = false;

                        auto rects = (const RECT*) (rgnData + sizeof (RGNDATAHEADER));

                        for (int i = (int) ((RGNDATA*) rgnData)->rdh.nCount; --i >= 0;)
                        {
                            if (rects->right <= x + w && rects->bottom <= y + h)
                            {
                                const int cx = jmax (x, (int) rects->left);
                                contextClip.addWithoutMerging (Rectangle<int> (cx - x, rects->top - y,
                                                                               rects->right - cx, rects->bottom - rects->top)
                                                                   .getIntersection (clipBounds));
                            }
                            else
                            {
                                needToPaintAll = true;
                                break;
                            }

                            ++rects;
                        }
                    }
                }
            }

            if (needToPaintAll)
            {
                contextClip.clear();
                contextClip.addWithoutMerging (Rectangle<int> (w, h));
            }

            ChildWindowClippingInfo childClipInfo = { dc, this, &contextClip, Point<int> (x, y), 0 };
            EnumChildWindows (hwnd, clipChildWindowCallback, (LPARAM) &childClipInfo);

            if (! contextClip.isEmpty())
            {
                if (transparent)
                    for (auto& i : contextClip)
                        offscreenImage.clear (i);

                {
                    auto context = component.getLookAndFeel()
                                    .createGraphicsContext (offscreenImage, { -x, -y }, contextClip);

                    context->addTransform (AffineTransform::scale ((float) getPlatformScaleFactor()));
                    handlePaint (*context);
                }

                static_cast<WindowsBitmapImage*> (offscreenImage.getPixelData())
                    ->blitToWindow (hwnd, dc, transparent, x, y, updateLayeredWindowAlpha);
            }

            if (childClipInfo.savedDC != 0)
                RestoreDC (dc, childClipInfo.savedDC);
        }
    }

    //==============================================================================
    void doMouseEvent (Point<float> position, float pressure, float orientation = 0.0f, ModifierKeys mods = ModifierKeys::currentModifiers)
    {
        handleMouseEvent (MouseInputSource::InputSourceType::mouse, position, mods, pressure, orientation, getMouseEventTime());
    }

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

       #if JUCE_DIRECT2D
        if (SystemStats::getOperatingSystemType() >= SystemStats::Windows7)
            s.add ("Direct2D");
       #endif

        return s;
    }

    int getCurrentRenderingEngine() const override    { return currentRenderingEngine; }

   #if JUCE_DIRECT2D
    void updateDirect2DContext()
    {
        if (currentRenderingEngine != direct2DRenderingEngine)
            direct2DContext = nullptr;
        else if (direct2DContext == nullptr)
            direct2DContext.reset (new Direct2DLowLevelGraphicsContext (hwnd));
    }
   #endif

    void setCurrentRenderingEngine (int index) override
    {
        ignoreUnused (index);

       #if JUCE_DIRECT2D
        if (getAvailableRenderingEngines().size() > 1)
        {
            currentRenderingEngine = index == 1 ? direct2DRenderingEngine : softwareRenderingEngine;
            updateDirect2DContext();
            repaint (component.getLocalBounds());
        }
       #endif
    }

    static uint32 getMinTimeBetweenMouseMoves()
    {
        if (SystemStats::getOperatingSystemType() >= SystemStats::WinVista)
            return 0;

        return 1000 / 60;  // Throttling the incoming mouse-events seems to still be needed in XP..
    }

    bool isTouchEvent() noexcept
    {
        if (registerTouchWindow == nullptr)
            return false;

        // Relevant info about touch/pen detection flags:
        // https://msdn.microsoft.com/en-us/library/windows/desktop/ms703320(v=vs.85).aspx
        // http://www.petertissen.de/?p=4

        return (GetMessageExtraInfo() & 0xFFFFFF80 /*SIGNATURE_MASK*/) == 0xFF515780 /*MI_WP_SIGNATURE*/;
    }

    static bool areOtherTouchSourcesActive()
    {
        for (auto& ms : Desktop::getInstance().getMouseSources())
            if (ms.isDragging() && (ms.getType() == MouseInputSource::InputSourceType::touch
                                     || ms.getType() == MouseInputSource::InputSourceType::pen))
                return true;

        return false;
    }

    void doMouseMove (Point<float> position, bool isMouseDownEvent)
    {
        ModifierKeys modsToSend (ModifierKeys::currentModifiers);

        // this will be handled by WM_TOUCH
        if (isTouchEvent() || areOtherTouchSourcesActive())
            return;

        if (! isMouseOver)
        {
            isMouseOver = true;

            // This avoids a rare stuck-button problem when focus is lost unexpectedly, but must
            // not be called as part of a move, in case it's actually a mouse-drag from another
            // app which ends up here when we get focus before the mouse is released..
            if (isMouseDownEvent && getNativeRealtimeModifiers != nullptr)
                getNativeRealtimeModifiers();

            updateKeyModifiers();

           #if JUCE_MODULE_AVAILABLE_juce_audio_plugin_client
            if (modProvider != nullptr)
                ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withFlags (modProvider->getWin32Modifiers());
           #endif

            TRACKMOUSEEVENT tme;
            tme.cbSize = sizeof (tme);
            tme.dwFlags = TME_LEAVE;
            tme.hwndTrack = hwnd;
            tme.dwHoverTime = 0;

            if (! TrackMouseEvent (&tme))
                jassertfalse;

            Desktop::getInstance().getMainMouseSource().forceMouseCursorUpdate();
        }
        else if (! isDragging)
        {
            if (! contains (position.roundToInt(), false))
                return;
        }

        static uint32 lastMouseTime = 0;
        static auto minTimeBetweenMouses = getMinTimeBetweenMouseMoves();
        auto now = Time::getMillisecondCounter();

        if (! Desktop::getInstance().getMainMouseSource().isDragging())
            modsToSend = modsToSend.withoutMouseButtons();

        if (now >= lastMouseTime + minTimeBetweenMouses)
        {
            lastMouseTime = now;
            doMouseEvent (position, MouseInputSource::invalidPressure,
                          MouseInputSource::invalidOrientation, modsToSend);
        }
    }

    void doMouseDown (Point<float> position, const WPARAM wParam)
    {
        // this will be handled by WM_TOUCH
        if (isTouchEvent() || areOtherTouchSourcesActive())
            return;

        if (GetCapture() != hwnd)
            SetCapture (hwnd);

        doMouseMove (position, true);

        if (isValidPeer (this))
        {
            updateModifiersFromWParam (wParam);

           #if JUCE_MODULE_AVAILABLE_juce_audio_plugin_client
            if (modProvider != nullptr)
                ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withFlags (modProvider->getWin32Modifiers());
           #endif

            isDragging = true;

            doMouseEvent (position, MouseInputSource::invalidPressure);
        }
    }

    void doMouseUp (Point<float> position, const WPARAM wParam)
    {
        // this will be handled by WM_TOUCH
        if (isTouchEvent() || areOtherTouchSourcesActive())
            return;

        updateModifiersFromWParam (wParam);

       #if JUCE_MODULE_AVAILABLE_juce_audio_plugin_client
        if (modProvider != nullptr)
            ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withFlags (modProvider->getWin32Modifiers());
       #endif

        const bool wasDragging = isDragging;
        isDragging = false;

        // release the mouse capture if the user has released all buttons
        if ((wParam & (MK_LBUTTON | MK_RBUTTON | MK_MBUTTON)) == 0 && hwnd == GetCapture())
            ReleaseCapture();

        // NB: under some circumstances (e.g. double-clicking a native title bar), a mouse-up can
        // arrive without a mouse-down, so in that case we need to avoid sending a message.
        if (wasDragging)
            doMouseEvent (position, MouseInputSource::invalidPressure);
    }

    void doCaptureChanged()
    {
        if (constrainerIsResizing)
        {
            if (constrainer != nullptr)
                constrainer->resizeEnd();

            constrainerIsResizing = false;
        }

        if (isDragging)
            doMouseUp (getCurrentMousePos(), (WPARAM) 0);
    }

    void doMouseExit()
    {
        isMouseOver = false;

        if (! areOtherTouchSourcesActive())
            doMouseEvent (getCurrentMousePos(), MouseInputSource::invalidPressure);
    }

    ComponentPeer* findPeerUnderMouse (Point<float>& localPos)
    {
        auto currentMousePos = getPOINTFromLParam (GetMessagePos());

        // Because Windows stupidly sends all wheel events to the window with the keyboard
        // focus, we have to redirect them here according to the mouse pos..
        auto* peer = getOwnerOfWindow (WindowFromPoint (currentMousePos));

        if (peer == nullptr)
            peer = this;

        localPos = peer->globalToLocal (convertPhysicalScreenPointToLogical (pointFromPOINT (currentMousePos), hwnd).toFloat());
        return peer;
    }

    static MouseInputSource::InputSourceType getPointerType (WPARAM wParam)
    {
        if (getPointerTypeFunction != nullptr)
        {
            POINTER_INPUT_TYPE pointerType;

            if (getPointerTypeFunction (GET_POINTERID_WPARAM (wParam), &pointerType))
            {
                if (pointerType == 2)
                    return MouseInputSource::InputSourceType::touch;

                if (pointerType == 3)
                    return MouseInputSource::InputSourceType::pen;
            }
        }

        return MouseInputSource::InputSourceType::mouse;
    }

    void doMouseWheel (const WPARAM wParam, const bool isVertical)
    {
        updateKeyModifiers();
        const float amount = jlimit (-1000.0f, 1000.0f, 0.5f * (short) HIWORD (wParam));

        MouseWheelDetails wheel;
        wheel.deltaX = isVertical ? 0.0f : amount / -256.0f;
        wheel.deltaY = isVertical ? amount / 256.0f : 0.0f;
        wheel.isReversed = false;
        wheel.isSmooth = false;
        wheel.isInertial = false;

        Point<float> localPos;

        if (auto* peer = findPeerUnderMouse (localPos))
            peer->handleMouseWheel (getPointerType (wParam), localPos, getMouseEventTime(), wheel);
    }

    bool doGestureEvent (LPARAM lParam)
    {
        GESTUREINFO gi;
        zerostruct (gi);
        gi.cbSize = sizeof (gi);

        if (getGestureInfo != nullptr && getGestureInfo ((HGESTUREINFO) lParam, &gi))
        {
            updateKeyModifiers();
            Point<float> localPos;

            if (auto* peer = findPeerUnderMouse (localPos))
            {
                switch (gi.dwID)
                {
                    case 3: /*GID_ZOOM*/
                        if (gi.dwFlags != 1 /*GF_BEGIN*/ && lastMagnifySize > 0)
                            peer->handleMagnifyGesture (MouseInputSource::InputSourceType::touch, localPos, getMouseEventTime(),
                                                        (float) (gi.ullArguments / (double) lastMagnifySize));

                        lastMagnifySize = gi.ullArguments;
                        return true;

                    case 4: /*GID_PAN*/
                    case 5: /*GID_ROTATE*/
                    case 6: /*GID_TWOFINGERTAP*/
                    case 7: /*GID_PRESSANDTAP*/
                    default:
                        break;
                }
            }
        }

        return false;
    }

    LRESULT doTouchEvent (const int numInputs, HTOUCHINPUT eventHandle)
    {
        if ((styleFlags & windowIgnoresMouseClicks) != 0)
            if (auto* parent = getOwnerOfWindow (GetParent (hwnd)))
                if (parent != this)
                    return parent->doTouchEvent (numInputs, eventHandle);

        HeapBlock<TOUCHINPUT> inputInfo (numInputs);

        if (getTouchInputInfo (eventHandle, (UINT) numInputs, inputInfo, sizeof (TOUCHINPUT)))
        {
            for (int i = 0; i < numInputs; ++i)
            {
                auto flags = inputInfo[i].dwFlags;

                if ((flags & (TOUCHEVENTF_DOWN | TOUCHEVENTF_MOVE | TOUCHEVENTF_UP)) != 0)
                    if (! handleTouchInput (inputInfo[i], (flags & TOUCHEVENTF_DOWN) != 0, (flags & TOUCHEVENTF_UP) != 0))
                        return 0;  // abandon method if this window was deleted by the callback
            }
        }

        closeTouchInputHandle (eventHandle);
        return 0;
    }

    bool handleTouchInput (const TOUCHINPUT& touch, const bool isDown, const bool isUp,
                           const float touchPressure = MouseInputSource::invalidPressure,
                           const float orientation = 0.0f)
    {
        auto isCancel = false;

        const auto touchIndex = currentTouches.getIndexOfTouch (this, touch.dwID);
        const auto time = getMouseEventTime();
        const auto pos = globalToLocal (convertPhysicalScreenPointToLogical (pointFromPOINT ({ roundToInt (touch.x / 100.0f),
                                                                                               roundToInt (touch.y / 100.0f) }), hwnd).toFloat());
        const auto pressure = touchPressure;
        auto modsToSend = ModifierKeys::currentModifiers;

        if (isDown)
        {
            ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withoutMouseButtons().withFlags (ModifierKeys::leftButtonModifier);
            modsToSend = ModifierKeys::currentModifiers;

            // this forces a mouse-enter/up event, in case for some reason we didn't get a mouse-up before.
            handleMouseEvent (MouseInputSource::InputSourceType::touch, pos, modsToSend.withoutMouseButtons(),
                              pressure, orientation, time, {}, touchIndex);

            if (! isValidPeer (this)) // (in case this component was deleted by the event)
                return false;
        }
        else if (isUp)
        {
            modsToSend = modsToSend.withoutMouseButtons();
            ModifierKeys::currentModifiers = modsToSend;
            currentTouches.clearTouch (touchIndex);

            if (! currentTouches.areAnyTouchesActive())
                isCancel = true;
        }
        else
        {
            modsToSend = ModifierKeys::currentModifiers.withoutMouseButtons().withFlags (ModifierKeys::leftButtonModifier);
        }

        handleMouseEvent (MouseInputSource::InputSourceType::touch, pos, modsToSend,
                          pressure, orientation, time, {}, touchIndex);

        if (! isValidPeer (this))
            return false;

        if (isUp)
        {
            handleMouseEvent (MouseInputSource::InputSourceType::touch, MouseInputSource::offscreenMousePos, ModifierKeys::currentModifiers.withoutMouseButtons(),
                              pressure, orientation, time, {}, touchIndex);

            if (! isValidPeer (this))
                return false;

            if (isCancel)
            {
                currentTouches.clear();
                ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withoutMouseButtons();
            }
        }

        return true;
    }

    bool handlePointerInput (WPARAM wParam, LPARAM lParam, const bool isDown, const bool isUp)
    {
        if (! canUsePointerAPI)
            return false;

        auto pointerType = getPointerType (wParam);

        if (pointerType == MouseInputSource::InputSourceType::touch)
        {
            POINTER_TOUCH_INFO touchInfo;

            if (! getPointerTouchInfo (GET_POINTERID_WPARAM (wParam), &touchInfo))
                return false;

            const auto pressure = touchInfo.touchMask & TOUCH_MASK_PRESSURE ? touchInfo.pressure
                                                                            : MouseInputSource::invalidPressure;
            const auto orientation = touchInfo.touchMask & TOUCH_MASK_ORIENTATION ? degreesToRadians (static_cast<float> (touchInfo.orientation))
                                                                                  : MouseInputSource::invalidOrientation;

            if (! handleTouchInput (emulateTouchEventFromPointer (touchInfo.pointerInfo.ptPixelLocationRaw, wParam),
                                    isDown, isUp, pressure, orientation))
                return false;
        }
        else if (pointerType == MouseInputSource::InputSourceType::pen)
        {
            POINTER_PEN_INFO penInfo;

            if (! getPointerPenInfo (GET_POINTERID_WPARAM (wParam), &penInfo))
                return false;

            const auto pressure = (penInfo.penMask & PEN_MASK_PRESSURE) ? penInfo.pressure / 1024.0f : MouseInputSource::invalidPressure;

            if (! handlePenInput (penInfo, globalToLocal (convertPhysicalScreenPointToLogical (pointFromPOINT (getPOINTFromLParam (lParam)), hwnd).toFloat()),
                                  pressure, isDown, isUp))
                return false;
        }
        else
        {
            return false;
        }

        return true;
    }

    TOUCHINPUT emulateTouchEventFromPointer (POINT p, WPARAM wParam)
    {
        TOUCHINPUT touchInput;

        touchInput.dwID = GET_POINTERID_WPARAM (wParam);
        touchInput.x = p.x * 100;
        touchInput.y = p.y * 100;

        return touchInput;
    }

    bool handlePenInput (POINTER_PEN_INFO penInfo, Point<float> pos, const float pressure, bool isDown, bool isUp)
    {
        const auto time = getMouseEventTime();
        ModifierKeys modsToSend (ModifierKeys::currentModifiers);
        PenDetails penDetails;

        penDetails.rotation = (penInfo.penMask & PEN_MASK_ROTATION) ? degreesToRadians (static_cast<float> (penInfo.rotation)) : MouseInputSource::invalidRotation;
        penDetails.tiltX = (penInfo.penMask & PEN_MASK_TILT_X) ? penInfo.tiltX / 90.0f : MouseInputSource::invalidTiltX;
        penDetails.tiltY = (penInfo.penMask & PEN_MASK_TILT_Y) ? penInfo.tiltY / 90.0f : MouseInputSource::invalidTiltY;

        auto pInfoFlags = penInfo.pointerInfo.pointerFlags;

        if ((pInfoFlags & POINTER_FLAG_FIRSTBUTTON) != 0)
            ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withoutMouseButtons().withFlags (ModifierKeys::leftButtonModifier);
        else if ((pInfoFlags & POINTER_FLAG_SECONDBUTTON) != 0)
            ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withoutMouseButtons().withFlags (ModifierKeys::rightButtonModifier);

        if (isDown)
        {
            modsToSend = ModifierKeys::currentModifiers;

            // this forces a mouse-enter/up event, in case for some reason we didn't get a mouse-up before.
            handleMouseEvent (MouseInputSource::InputSourceType::pen, pos, modsToSend.withoutMouseButtons(),
                              pressure, MouseInputSource::invalidOrientation, time, penDetails);

            if (! isValidPeer (this)) // (in case this component was deleted by the event)
                return false;
        }
        else if (isUp || ! (pInfoFlags & POINTER_FLAG_INCONTACT))
        {
            modsToSend = modsToSend.withoutMouseButtons();
            ModifierKeys::currentModifiers = ModifierKeys::currentModifiers.withoutMouseButtons();
        }

        handleMouseEvent (MouseInputSource::InputSourceType::pen, pos, modsToSend, pressure,
                          MouseInputSource::invalidOrientation, time, penDetails);

        if (! isValidPeer (this)) // (in case this component was deleted by the event)
            return false;

        if (isUp)
        {
            handleMouseEvent (MouseInputSource::InputSourceType::pen, MouseInputSource::offscreenMousePos, ModifierKeys::currentModifiers,
                              pressure, MouseInputSource::invalidOrientation, time, penDetails);

            if (! isValidPeer (this))
                return false;
        }

        return true;
    }

    //==============================================================================
    void sendModifierKeyChangeIfNeeded()
    {
        if (modifiersAtLastCallback != ModifierKeys::currentModifiers)
        {
            modifiersAtLastCallback = ModifierKeys::currentModifiers;
            handleModifierKeysChange();
        }
    }

    bool doKeyUp (const WPARAM key)
    {
        updateKeyModifiers();

        switch (key)
        {
            case VK_SHIFT:
            case VK_CONTROL:
            case VK_MENU:
            case VK_CAPITAL:
            case VK_LWIN:
            case VK_RWIN:
            case VK_APPS:
            case VK_NUMLOCK:
            case VK_SCROLL:
            case VK_LSHIFT:
            case VK_RSHIFT:
            case VK_LCONTROL:
            case VK_LMENU:
            case VK_RCONTROL:
            case VK_RMENU:
                sendModifierKeyChangeIfNeeded();
        }

        return handleKeyUpOrDown (false)
                || Component::getCurrentlyModalComponent() != nullptr;
    }

    bool doKeyDown (const WPARAM key)
    {
        updateKeyModifiers();
        bool used = false;

        switch (key)
        {
            case VK_SHIFT:
            case VK_LSHIFT:
            case VK_RSHIFT:
            case VK_CONTROL:
            case VK_LCONTROL:
            case VK_RCONTROL:
            case VK_MENU:
            case VK_LMENU:
            case VK_RMENU:
            case VK_LWIN:
            case VK_RWIN:
            case VK_CAPITAL:
            case VK_NUMLOCK:
            case VK_SCROLL:
            case VK_APPS:
                used = handleKeyUpOrDown (true);
                sendModifierKeyChangeIfNeeded();
                break;

            case VK_LEFT:
            case VK_RIGHT:
            case VK_UP:
            case VK_DOWN:
            case VK_PRIOR:
            case VK_NEXT:
            case VK_HOME:
            case VK_END:
            case VK_DELETE:
            case VK_INSERT:
            case VK_F1:
            case VK_F2:
            case VK_F3:
            case VK_F4:
            case VK_F5:
            case VK_F6:
            case VK_F7:
            case VK_F8:
            case VK_F9:
            case VK_F10:
            case VK_F11:
            case VK_F12:
            case VK_F13:
            case VK_F14:
            case VK_F15:
            case VK_F16:
            case VK_F17:
            case VK_F18:
            case VK_F19:
            case VK_F20:
            case VK_F21:
            case VK_F22:
            case VK_F23:
            case VK_F24:
                used = handleKeyUpOrDown (true);
                used = handleKeyPress (extendedKeyModifier | (int) key, 0) || used;
                break;

            default:
                used = handleKeyUpOrDown (true);

                {
                    MSG msg;
                    if (! PeekMessage (&msg, hwnd, WM_CHAR, WM_DEADCHAR, PM_NOREMOVE))
                    {
                        // if there isn't a WM_CHAR or WM_DEADCHAR message pending, we need to
                        // manually generate the key-press event that matches this key-down.
                        const UINT keyChar  = MapVirtualKey ((UINT) key, 2);
                        const UINT scanCode = MapVirtualKey ((UINT) key, 0);
                        BYTE keyState[256];
                        GetKeyboardState (keyState);

                        WCHAR text[16] = { 0 };
                        if (ToUnicode ((UINT) key, scanCode, keyState, text, 8, 0) != 1)
                            text[0] = 0;

                        used = handleKeyPress ((int) LOWORD (keyChar), (juce_wchar) text[0]) || used;
                    }
                }

                break;
        }

        return used || (Component::getCurrentlyModalComponent() != nullptr);
    }

    bool doKeyChar (int key, const LPARAM flags)
    {
        updateKeyModifiers();

        auto textChar = (juce_wchar) key;
        const int virtualScanCode = (flags >> 16) & 0xff;

        if (key >= '0' && key <= '9')
        {
            switch (virtualScanCode)  // check for a numeric keypad scan-code
            {
                case 0x52:
                case 0x4f:
                case 0x50:
                case 0x51:
                case 0x4b:
                case 0x4c:
                case 0x4d:
                case 0x47:
                case 0x48:
                case 0x49:
                    key = (key - '0') + KeyPress::numberPad0;
                    break;
                default:
                    break;
            }
        }
        else
        {
            // convert the scan code to an unmodified character code..
            const UINT virtualKey = MapVirtualKey ((UINT) virtualScanCode, 1);
            UINT keyChar = MapVirtualKey (virtualKey, 2);

            keyChar = LOWORD (keyChar);

            if (keyChar != 0)
                key = (int) keyChar;

            // avoid sending junk text characters for some control-key combinations
            if (textChar < ' ' && ModifierKeys::currentModifiers.testFlags (ModifierKeys::ctrlModifier | ModifierKeys::altModifier))
                textChar = 0;
        }

        return handleKeyPress (key, textChar);
    }

    void forwardMessageToParent (UINT message, WPARAM wParam, LPARAM lParam) const
    {
        if (HWND parentH = GetParent (hwnd))
            PostMessage (parentH, message, wParam, lParam);
    }

    bool doAppCommand (const LPARAM lParam)
    {
        int key = 0;

        switch (GET_APPCOMMAND_LPARAM (lParam))
        {
            case APPCOMMAND_MEDIA_PLAY_PAUSE:       key = KeyPress::playKey; break;
            case APPCOMMAND_MEDIA_STOP:             key = KeyPress::stopKey; break;
            case APPCOMMAND_MEDIA_NEXTTRACK:        key = KeyPress::fastForwardKey; break;
            case APPCOMMAND_MEDIA_PREVIOUSTRACK:    key = KeyPress::rewindKey; break;
            default: break;
        }

        if (key != 0)
        {
            updateKeyModifiers();

            if (hwnd == GetActiveWindow())
            {
                handleKeyPress (key, 0);
                return true;
            }
        }

        return false;
    }

    bool isConstrainedNativeWindow() const
    {
        return constrainer != nullptr
                && (styleFlags & (windowHasTitleBar | windowIsResizable)) == (windowHasTitleBar | windowIsResizable)
                && ! isKioskMode();
    }

    Rectangle<int> getCurrentScaledBounds() const
    {
        return ScalingHelpers::unscaledScreenPosToScaled (component, windowBorder.addedTo (ScalingHelpers::scaledScreenPosToUnscaled (component, component.getBounds())));
    }

    LRESULT handleSizeConstraining (RECT& r, const WPARAM wParam)
    {
        if (isConstrainedNativeWindow())
        {
            auto pos = ScalingHelpers::unscaledScreenPosToScaled (component, convertPhysicalScreenRectangleToLogical (rectangleFromRECT (r), hwnd));
            auto current = getCurrentScaledBounds();

            constrainer->checkBounds (pos, current,
                                      Desktop::getInstance().getDisplays().getTotalBounds (true),
                                      wParam == WMSZ_TOP    || wParam == WMSZ_TOPLEFT    || wParam == WMSZ_TOPRIGHT,
                                      wParam == WMSZ_LEFT   || wParam == WMSZ_TOPLEFT    || wParam == WMSZ_BOTTOMLEFT,
                                      wParam == WMSZ_BOTTOM || wParam == WMSZ_BOTTOMLEFT || wParam == WMSZ_BOTTOMRIGHT,
                                      wParam == WMSZ_RIGHT  || wParam == WMSZ_TOPRIGHT   || wParam == WMSZ_BOTTOMRIGHT);

            r = RECTFromRectangle (convertLogicalScreenRectangleToPhysical (ScalingHelpers::scaledScreenPosToUnscaled (component, pos), hwnd));
        }

        return TRUE;
    }

    LRESULT handlePositionChanging (WINDOWPOS& wp)
    {
        if (isConstrainedNativeWindow())
        {
            if ((wp.flags & (SWP_NOMOVE | SWP_NOSIZE)) != (SWP_NOMOVE | SWP_NOSIZE)
                 && (wp.x > -32000 && wp.y > -32000)
                 && ! Component::isMouseButtonDownAnywhere())
            {
                auto pos = ScalingHelpers::unscaledScreenPosToScaled (component, convertPhysicalScreenRectangleToLogical (rectangleFromRECT ({ wp.x, wp.y, wp.x + wp.cx, wp.y + wp.cy }), hwnd));
                auto current = getCurrentScaledBounds();

                constrainer->checkBounds (pos, current,
                                          Desktop::getInstance().getDisplays().getTotalBounds (true),
                                          pos.getY() != current.getY() && pos.getBottom() == current.getBottom(),
                                          pos.getX() != current.getX() && pos.getRight()  == current.getRight(),
                                          pos.getY() == current.getY() && pos.getBottom() != current.getBottom(),
                                          pos.getX() == current.getX() && pos.getRight()  != current.getRight());

                pos = convertLogicalScreenRectangleToPhysical (ScalingHelpers::scaledScreenPosToUnscaled (component, pos), hwnd);

                wp.x  = pos.getX();
                wp.y  = pos.getY();
                wp.cx = pos.getWidth();
                wp.cy = pos.getHeight();
            }
        }

        if (((wp.flags & SWP_SHOWWINDOW) != 0 && ! component.isVisible()))
            component.setVisible (true);
        else if (((wp.flags & SWP_HIDEWINDOW) != 0 && component.isVisible()))
            component.setVisible (false);

        return 0;
    }

    bool handlePositionChanged()
    {
        auto pos = getCurrentMousePos();

        if (contains (pos.roundToInt(), false))
        {
            if (! areOtherTouchSourcesActive())
                doMouseEvent (pos, MouseInputSource::invalidPressure);

            if (! isValidPeer (this))
                return true;
        }

        handleMovedOrResized();

        return ! dontRepaint; // to allow non-accelerated openGL windows to draw themselves correctly..
    }

    LRESULT handleDPIChanging (int newDPI, RECT newRect)
    {
        auto newScale = (double) newDPI / USER_DEFAULT_SCREEN_DPI;

        if (! approximatelyEqual (scaleFactor, newScale))
        {
            const ScopedValueSetter<bool> setter (isInDPIChange, true);

            auto oldScale = scaleFactor;
            scaleFactor = newScale;

            auto scaleRatio = scaleFactor / oldScale;
            EnumChildWindows (hwnd, scaleChildHWNDCallback, (LPARAM) &scaleRatio);

            setBounds (windowBorder.subtractedFrom (convertPhysicalScreenRectangleToLogical (rectangleFromRECT (newRect), hwnd)), false);
            updateShadower();
            InvalidateRect (hwnd, nullptr, FALSE);
            scaleFactorListeners.call ([&] (ScaleFactorListener& l) { l.nativeScaleFactorChanged (scaleFactor); });
        }

        return 0;
    }

    static BOOL CALLBACK scaleChildHWNDCallback (HWND hwnd, LPARAM context)
    {
        auto r = getWindowRect (hwnd);

        POINT p { r.left, r.top };
        ScreenToClient (GetParent (hwnd), &p);

        auto ratio = *(double*) context;
        SetWindowPos (hwnd, nullptr, roundToInt (p.x * ratio), roundToInt (p.y * ratio),
                      roundToInt ((r.right - r.left) * ratio), roundToInt ((r.bottom - r.top) * ratio),
                      SWP_NOACTIVATE | SWP_NOZORDER | SWP_NOOWNERZORDER);

        if (auto* peer = getOwnerOfWindow (hwnd))
            peer->handleChildDPIChanging();

        return TRUE;
    }

    void handleChildDPIChanging()
    {
        const ScopedValueSetter<bool> setter (isInDPIChange, true);

        scaleFactor = getScaleFactorForWindow (parentToAddTo);

        updateShadower();
        InvalidateRect (hwnd, nullptr, FALSE);
        scaleFactorListeners.call ([&] (ScaleFactorListener& l) { l.nativeScaleFactorChanged (scaleFactor); });
    }

    void handleAppActivation (const WPARAM wParam)
    {
        modifiersAtLastCallback = -1;
        updateKeyModifiers();

        if (isMinimised())
        {
            component.repaint();
            handleMovedOrResized();

            if (! isValidPeer (this))
                return;
        }

        auto* underMouse = component.getComponentAt (component.getMouseXYRelative());

        if (underMouse == nullptr)
            underMouse = &component;

        if (underMouse->isCurrentlyBlockedByAnotherModalComponent())
        {
            if (LOWORD (wParam) == WA_CLICKACTIVE)
                Component::getCurrentlyModalComponent()->inputAttemptWhenModal();
            else
                ModalComponentManager::getInstance()->bringModalComponentsToFront();
        }
        else
        {
            handleBroughtToFront();
        }
    }

    void handlePowerBroadcast (WPARAM wParam)
    {
        if (auto* app = JUCEApplicationBase::getInstance())
        {
            switch (wParam)
            {
                case PBT_APMSUSPEND:                app->suspended(); break;

                case PBT_APMQUERYSUSPENDFAILED:
                case PBT_APMRESUMECRITICAL:
                case PBT_APMRESUMESUSPEND:
                case PBT_APMRESUMEAUTOMATIC:        app->resumed(); break;

                default: break;
            }
        }
    }

    void handleLeftClickInNCArea (WPARAM wParam)
    {
        if (! sendInputAttemptWhenModalMessage())
        {
            switch (wParam)
            {
            case HTBOTTOM:
            case HTBOTTOMLEFT:
            case HTBOTTOMRIGHT:
            case HTGROWBOX:
            case HTLEFT:
            case HTRIGHT:
            case HTTOP:
            case HTTOPLEFT:
            case HTTOPRIGHT:
                if (isConstrainedNativeWindow())
                {
                    constrainerIsResizing = true;
                    constrainer->resizeStart();
                }
                break;

            default:
                break;
            }
        }
    }

    void initialiseSysMenu (HMENU menu) const
    {
        if (! hasTitleBar())
        {
            if (isFullScreen())
            {
                EnableMenuItem (menu, SC_RESTORE,  MF_BYCOMMAND | MF_ENABLED);
                EnableMenuItem (menu, SC_MOVE,     MF_BYCOMMAND | MF_GRAYED);
            }
            else if (! isMinimised())
            {
                EnableMenuItem (menu, SC_MAXIMIZE, MF_BYCOMMAND | MF_GRAYED);
            }
        }
    }

    void doSettingChange()
    {
        forceDisplayUpdate();

        if (fullScreen && ! isMinimised())
            setWindowPos (hwnd, ScalingHelpers::scaledScreenPosToUnscaled (component, Desktop::getInstance().getDisplays()
                                                                                              .findDisplayForRect (component.getScreenBounds()).userArea),
                          SWP_NOACTIVATE | SWP_NOOWNERZORDER | SWP_NOZORDER | SWP_NOSENDCHANGING);
    }

    static void forceDisplayUpdate()
    {
        const_cast<Displays&> (Desktop::getInstance().getDisplays()).refresh();
    }

    //==============================================================================
  #if JUCE_MODULE_AVAILABLE_juce_audio_plugin_client
    void setModifierKeyProvider (ModifierKeyProvider* provider) override
    {
        modProvider = provider;
    }

    void removeModifierKeyProvider() override
    {
        modProvider = nullptr;
    }
   #endif

    //==============================================================================
public:
    static LRESULT CALLBACK windowProc (HWND h, UINT message, WPARAM wParam, LPARAM lParam)
    {
        // Ensure that non-client areas are scaled for per-monitor DPI awareness v1 - can't
        // do this in peerWindowProc as we have no window at this point
        if (message == WM_NCCREATE && enableNonClientDPIScaling != nullptr)
            enableNonClientDPIScaling (h);

        if (auto* peer = getOwnerOfWindow (h))
        {
            jassert (isValidPeer (peer));
            return peer->peerWindowProc (h, message, wParam, lParam);
        }

        return DefWindowProcW (h, message, wParam, lParam);
    }

private:
    static void* callFunctionIfNotLocked (MessageCallbackFunction* callback, void* userData)
    {
        auto& mm = *MessageManager::getInstance();

        if (mm.currentThreadHasLockedMessageManager())
            return callback (userData);

        return mm.callFunctionOnMessageThread (callback, userData);
    }

    static POINT getPOINTFromLParam (LPARAM lParam) noexcept
    {
        return { GET_X_LPARAM (lParam), GET_Y_LPARAM (lParam) };
    }

    Point<float> getPointFromLocalLParam (LPARAM lParam) noexcept
    {
       #if JUCE_WIN_PER_MONITOR_DPI_AWARE
        if (isPerMonitorDPIAwareWindow (hwnd))
        {
            // LPARAM is relative to this window's top-left but may be on a different monitor so we need to calculate the
            // physical screen position and then convert this to local logical coordinates
            auto localPos = getPOINTFromLParam (lParam);
            auto r = getWindowRect (hwnd);

            return globalToLocal (Desktop::getInstance().getDisplays().physicalToLogical (pointFromPOINT ({ r.left + localPos.x + roundToInt (windowBorder.getLeft() * scaleFactor),
                                                                                                            r.top  + localPos.y + roundToInt (windowBorder.getTop()  * scaleFactor) })).toFloat());
        }
       #endif

        return { static_cast<float> (GET_X_LPARAM (lParam)), static_cast<float> (GET_Y_LPARAM (lParam)) };
    }

    Point<float> getCurrentMousePos() noexcept
    {
        return globalToLocal (convertPhysicalScreenPointToLogical (pointFromPOINT (getPOINTFromLParam (GetMessagePos())), hwnd).toFloat());
    }

    LRESULT peerWindowProc (HWND h, UINT message, WPARAM wParam, LPARAM lParam)
    {
        switch (message)
        {
            //==============================================================================
            case WM_NCHITTEST:
                if ((styleFlags & windowIgnoresMouseClicks) != 0)
                    return HTTRANSPARENT;

                if (! hasTitleBar())
                    return HTCLIENT;

                break;

            //==============================================================================
            case WM_PAINT:
                handlePaintMessage();
                return 0;

            case WM_NCPAINT:
                handlePaintMessage(); // this must be done, even with native titlebars, or there are rendering artifacts.

                if (hasTitleBar())
                    break; // let the DefWindowProc handle drawing the frame.

                return 0;

            case WM_ERASEBKGND:
            case WM_NCCALCSIZE:
                if (hasTitleBar())
                    break;

                return 1;

            //==============================================================================
            case WM_POINTERUPDATE:
                if (handlePointerInput (wParam, lParam, false, false))
                    return 0;
                break;

            case WM_POINTERDOWN:
                if (handlePointerInput (wParam, lParam, true, false))
                    return 0;
                break;

            case WM_POINTERUP:
                if (handlePointerInput (wParam, lParam, false, true))
                    return 0;
                break;

            //==============================================================================
            case WM_MOUSEMOVE:          doMouseMove (getPointFromLocalLParam (lParam), false); return 0;

            case WM_POINTERLEAVE:
            case WM_MOUSELEAVE:         doMouseExit(); return 0;

            case WM_LBUTTONDOWN:
            case WM_MBUTTONDOWN:
            case WM_RBUTTONDOWN:        doMouseDown (getPointFromLocalLParam (lParam), wParam); return 0;

            case WM_LBUTTONUP:
            case WM_MBUTTONUP:
            case WM_RBUTTONUP:          doMouseUp (getPointFromLocalLParam (lParam), wParam); return 0;

            case WM_POINTERWHEEL:
            case 0x020A: /* WM_MOUSEWHEEL */   doMouseWheel (wParam, true);  return 0;

            case WM_POINTERHWHEEL:
            case 0x020E: /* WM_MOUSEHWHEEL */  doMouseWheel (wParam, false); return 0;

            case WM_CAPTURECHANGED:     doCaptureChanged(); return 0;

            case WM_NCPOINTERUPDATE:
            case WM_NCMOUSEMOVE:
                if (hasTitleBar())
                    break;

                return 0;

            case WM_TOUCH:
                if (getTouchInputInfo != nullptr)
                    return doTouchEvent ((int) wParam, (HTOUCHINPUT) lParam);

                break;

            case 0x119: /* WM_GESTURE */
                if (doGestureEvent (lParam))
                    return 0;

                break;

            //==============================================================================
            case WM_SIZING:                  return handleSizeConstraining (*(RECT*) lParam, wParam);
            case WM_WINDOWPOSCHANGING:       return handlePositionChanging (*(WINDOWPOS*) lParam);
            case 0x2e0: /* WM_DPICHANGED */  return handleDPIChanging ((int) HIWORD (wParam), *(RECT*) lParam);

            case WM_WINDOWPOSCHANGED:
            {
                const WINDOWPOS& wPos = *reinterpret_cast<WINDOWPOS*> (lParam);

                if ((wPos.flags & SWP_NOMOVE) != 0 && (wPos.flags & SWP_NOSIZE) != 0)
                    startTimer (100);
                else
                    if (handlePositionChanged())
                        return 0;
            }
            break;

            //==============================================================================
            case WM_KEYDOWN:
            case WM_SYSKEYDOWN:
                if (doKeyDown (wParam))
                    return 0;

                forwardMessageToParent (message, wParam, lParam);
                break;

            case WM_KEYUP:
            case WM_SYSKEYUP:
                if (doKeyUp (wParam))
                    return 0;

                forwardMessageToParent (message, wParam, lParam);
                break;

            case WM_CHAR:
                if (doKeyChar ((int) wParam, lParam))
                    return 0;

                forwardMessageToParent (message, wParam, lParam);
                break;

            case WM_APPCOMMAND:
                if (doAppCommand (lParam))
                    return TRUE;

                break;

            case WM_MENUCHAR: // triggered when alt+something is pressed
                return MNC_CLOSE << 16; // (avoids making the default system beep)

            //==============================================================================
            case WM_SETFOCUS:
                updateKeyModifiers();
                handleFocusGain();
                break;

            case WM_KILLFOCUS:
                if (hasCreatedCaret)
                {
                    hasCreatedCaret = false;
                    DestroyCaret();
                }

                handleFocusLoss();
                break;

            case WM_ACTIVATEAPP:
                // Windows does weird things to process priority when you swap apps,
                // so this forces an update when the app is brought to the front
                if (wParam != FALSE)
                    juce_repeatLastProcessPriority();
                else
                    Desktop::getInstance().setKioskModeComponent (nullptr); // turn kiosk mode off if we lose focus

                juce_checkCurrentlyFocusedTopLevelWindow();
                modifiersAtLastCallback = -1;
                return 0;

            case WM_ACTIVATE:
                if (LOWORD (wParam) == WA_ACTIVE || LOWORD (wParam) == WA_CLICKACTIVE)
                {
                    handleAppActivation (wParam);
                    return 0;
                }

                break;

            case WM_NCACTIVATE:
                // while a temporary window is being shown, prevent Windows from deactivating the
                // title bars of our main windows.
                if (wParam == 0 && ! shouldDeactivateTitleBar)
                    wParam = TRUE; // change this and let it get passed to the DefWindowProc.

                break;

            case WM_POINTERACTIVATE:
            case WM_MOUSEACTIVATE:
                if (! component.getMouseClickGrabsKeyboardFocus())
                    return MA_NOACTIVATE;

                break;

            case WM_SHOWWINDOW:
                if (wParam != 0)
                {
                    component.setVisible (true);
                    handleBroughtToFront();
                }

                break;

            case WM_CLOSE:
                if (! component.isCurrentlyBlockedByAnotherModalComponent())
                    handleUserClosingWindow();

                return 0;

           #if JUCE_REMOVE_COMPONENT_FROM_DESKTOP_ON_WM_DESTROY
            case WM_DESTROY:
                getComponent().removeFromDesktop();
                return 0;
           #endif

            case WM_QUERYENDSESSION:
                if (auto* app = JUCEApplicationBase::getInstance())
                {
                    app->systemRequestedQuit();
                    return MessageManager::getInstance()->hasStopMessageBeenSent();
                }
                return TRUE;

            case WM_POWERBROADCAST:
                handlePowerBroadcast (wParam);
                break;

            case WM_SYNCPAINT:
                return 0;

            case WM_DISPLAYCHANGE:
                InvalidateRect (h, nullptr, 0);
                // intentional fall-through...
                JUCE_FALLTHROUGH
            case WM_SETTINGCHANGE:  // note the fall-through in the previous case!
                doSettingChange();
                break;

            case WM_INITMENU:
                initialiseSysMenu ((HMENU) wParam);
                break;

            case WM_SYSCOMMAND:
                switch (wParam & 0xfff0)
                {
                case SC_CLOSE:
                    if (sendInputAttemptWhenModalMessage())
                        return 0;

                    if (hasTitleBar())
                    {
                        PostMessage (h, WM_CLOSE, 0, 0);
                        return 0;
                    }
                    break;

                case SC_KEYMENU:
                   #if ! JUCE_WINDOWS_ALT_KEY_TRIGGERS_MENU
                    // This test prevents a press of the ALT key from triggering the ancient top-left window menu.
                    // By default we suppress this behaviour because it's unlikely that more than a tiny subset of
                    // our users will actually want it, and it causes problems if you're trying to use the ALT key
                    // as a modifier for mouse actions. If you really need the old behaviour, then just define
                    // JUCE_WINDOWS_ALT_KEY_TRIGGERS_MENU=1 in your app.
                    if ((lParam >> 16) <= 0) // Values above zero indicate that a mouse-click triggered the menu
                        return 0;
                   #endif

                    // (NB mustn't call sendInputAttemptWhenModalMessage() here because of very obscure
                    // situations that can arise if a modal loop is started from an alt-key keypress).
                    if (hasTitleBar() && h == GetCapture())
                        ReleaseCapture();

                    break;

                case SC_MAXIMIZE:
                    if (! sendInputAttemptWhenModalMessage())
                        setFullScreen (true);

                    return 0;

                case SC_MINIMIZE:
                    if (sendInputAttemptWhenModalMessage())
                        return 0;

                    if (! hasTitleBar())
                    {
                        setMinimised (true);
                        return 0;
                    }
                    break;

                case SC_RESTORE:
                    if (sendInputAttemptWhenModalMessage())
                        return 0;

                    if (hasTitleBar())
                    {
                        if (isFullScreen())
                        {
                            setFullScreen (false);
                            return 0;
                        }
                    }
                    else
                    {
                        if (isMinimised())
                            setMinimised (false);
                        else if (isFullScreen())
                            setFullScreen (false);

                        return 0;
                    }
                    break;
                }

                break;

            case WM_NCPOINTERDOWN:
            case WM_NCLBUTTONDOWN:
                handleLeftClickInNCArea (wParam);
                break;

            case WM_NCRBUTTONDOWN:
            case WM_NCMBUTTONDOWN:
                sendInputAttemptWhenModalMessage();
                break;

            case WM_IME_SETCONTEXT:
                imeHandler.handleSetContext (h, wParam == TRUE);
                lParam &= ~ISC_SHOWUICOMPOSITIONWINDOW;
                break;

            case WM_IME_STARTCOMPOSITION:  imeHandler.handleStartComposition (*this); return 0;
            case WM_IME_ENDCOMPOSITION:    imeHandler.handleEndComposition (*this, h); break;
            case WM_IME_COMPOSITION:       imeHandler.handleComposition (*this, h, lParam); return 0;

            case WM_GETDLGCODE:
                return DLGC_WANTALLKEYS;

            default:
                break;
        }

        return DefWindowProcW (h, message, wParam, lParam);
    }

    bool sendInputAttemptWhenModalMessage()
    {
        if (component.isCurrentlyBlockedByAnotherModalComponent())
        {
            if (Component* const current = Component::getCurrentlyModalComponent())
                current->inputAttemptWhenModal();

            return true;
        }

        return false;
    }

    //==============================================================================
    struct IMEHandler
    {
        IMEHandler()
        {
            reset();
        }

        void handleSetContext (HWND hWnd, const bool windowIsActive)
        {
            if (compositionInProgress && ! windowIsActive)
            {
                compositionInProgress = false;

                if (HIMC hImc = ImmGetContext (hWnd))
                {
                    ImmNotifyIME (hImc, NI_COMPOSITIONSTR, CPS_COMPLETE, 0);
                    ImmReleaseContext (hWnd, hImc);
                }
            }
        }

        void handleStartComposition (ComponentPeer& owner)
        {
            reset();

            if (auto* target = owner.findCurrentTextInputTarget())
                target->insertTextAtCaret (String());
        }

        void handleEndComposition (ComponentPeer& owner, HWND hWnd)
        {
            if (compositionInProgress)
            {
                // If this occurs, the user has cancelled the composition, so clear their changes..
                if (auto* target = owner.findCurrentTextInputTarget())
                {
                    target->setHighlightedRegion (compositionRange);
                    target->insertTextAtCaret (String());
                    compositionRange.setLength (0);

                    target->setHighlightedRegion (Range<int>::emptyRange (compositionRange.getEnd()));
                    target->setTemporaryUnderlining ({});
                }

                if (auto hImc = ImmGetContext (hWnd))
                {
                    ImmNotifyIME (hImc, NI_CLOSECANDIDATE, 0, 0);
                    ImmReleaseContext (hWnd, hImc);
                }
            }

            reset();
        }

        void handleComposition (ComponentPeer& owner, HWND hWnd, const LPARAM lParam)
        {
            if (auto* target = owner.findCurrentTextInputTarget())
            {
                if (auto hImc = ImmGetContext (hWnd))
                {
                    if (compositionRange.getStart() < 0)
                        compositionRange = Range<int>::emptyRange (target->getHighlightedRegion().getStart());

                    if ((lParam & GCS_RESULTSTR) != 0) // (composition has finished)
                    {
                        replaceCurrentSelection (target, getCompositionString (hImc, GCS_RESULTSTR),
                                                 Range<int>::emptyRange (-1));

                        reset();
                        target->setTemporaryUnderlining ({});
                    }
                    else if ((lParam & GCS_COMPSTR) != 0) // (composition is still in-progress)
                    {
                        replaceCurrentSelection (target, getCompositionString (hImc, GCS_COMPSTR),
                                                 getCompositionSelection (hImc, lParam));

                        target->setTemporaryUnderlining (getCompositionUnderlines (hImc, lParam));
                        compositionInProgress = true;
                    }

                    moveCandidateWindowToLeftAlignWithSelection (hImc, owner, target);
                    ImmReleaseContext (hWnd, hImc);
                }
            }
        }

    private:
        //==============================================================================
        Range<int> compositionRange; // The range being modified in the TextInputTarget
        bool compositionInProgress;

        //==============================================================================
        void reset()
        {
            compositionRange = Range<int>::emptyRange (-1);
            compositionInProgress = false;
        }

        String getCompositionString (HIMC hImc, const DWORD type) const
        {
            jassert (hImc != nullptr);

            const auto stringSizeBytes = ImmGetCompositionString (hImc, type, nullptr, 0);

            if (stringSizeBytes > 0)
            {
                HeapBlock<TCHAR> buffer;
                buffer.calloc ((size_t) stringSizeBytes / sizeof (TCHAR) + 1);
                ImmGetCompositionString (hImc, type, buffer, (DWORD) stringSizeBytes);
                return String (buffer.get());
            }

            return {};
        }

        int getCompositionCaretPos (HIMC hImc, LPARAM lParam, const String& currentIMEString) const
        {
            jassert (hImc != nullptr);

            if ((lParam & CS_NOMOVECARET) != 0)
                return compositionRange.getStart();

            if ((lParam & GCS_CURSORPOS) != 0)
            {
                const int localCaretPos = ImmGetCompositionString (hImc, GCS_CURSORPOS, nullptr, 0);
                return compositionRange.getStart() + jmax (0, localCaretPos);
            }

            return compositionRange.getStart() + currentIMEString.length();
        }

        // Get selected/highlighted range while doing composition:
        // returned range is relative to beginning of TextInputTarget, not composition string
        Range<int> getCompositionSelection (HIMC hImc, LPARAM lParam) const
        {
            jassert (hImc != nullptr);
            int selectionStart = 0;
            int selectionEnd = 0;

            if ((lParam & GCS_COMPATTR) != 0)
            {
                // Get size of attributes array:
                const int attributeSizeBytes = ImmGetCompositionString (hImc, GCS_COMPATTR, nullptr, 0);

                if (attributeSizeBytes > 0)
                {
                    // Get attributes (8 bit flag per character):
                    HeapBlock<char> attributes (attributeSizeBytes);
                    ImmGetCompositionString (hImc, GCS_COMPATTR, attributes, (DWORD) attributeSizeBytes);

                    selectionStart = 0;

                    for (selectionStart = 0; selectionStart < attributeSizeBytes; ++selectionStart)
                        if (attributes[selectionStart] == ATTR_TARGET_CONVERTED || attributes[selectionStart] == ATTR_TARGET_NOTCONVERTED)
                            break;

                    for (selectionEnd = selectionStart; selectionEnd < attributeSizeBytes; ++selectionEnd)
                        if (attributes[selectionEnd] != ATTR_TARGET_CONVERTED && attributes[selectionEnd] != ATTR_TARGET_NOTCONVERTED)
                            break;
                }
            }

            return Range<int> (selectionStart, selectionEnd) + compositionRange.getStart();
        }

        void replaceCurrentSelection (TextInputTarget* const target, const String& newContent, Range<int> newSelection)
        {
            if (compositionInProgress)
                target->setHighlightedRegion (compositionRange);

            target->insertTextAtCaret (newContent);
            compositionRange.setLength (newContent.length());

            if (newSelection.getStart() < 0)
                newSelection = Range<int>::emptyRange (compositionRange.getEnd());

            target->setHighlightedRegion (newSelection);
        }

        Array<Range<int>> getCompositionUnderlines (HIMC hImc, LPARAM lParam) const
        {
            Array<Range<int>> result;

            if (hImc != nullptr && (lParam & GCS_COMPCLAUSE) != 0)
            {
                auto clauseDataSizeBytes = ImmGetCompositionString (hImc, GCS_COMPCLAUSE, nullptr, 0);

                if (clauseDataSizeBytes > 0)
                {
                    const auto numItems = (size_t) clauseDataSizeBytes / sizeof (uint32);
                    HeapBlock<uint32> clauseData (numItems);

                    if (ImmGetCompositionString (hImc, GCS_COMPCLAUSE, clauseData, (DWORD) clauseDataSizeBytes) > 0)
                        for (size_t i = 0; i + 1 < numItems; ++i)
                            result.add (Range<int> ((int) clauseData[i], (int) clauseData[i + 1]) + compositionRange.getStart());
                }
            }

            return result;
        }

        void moveCandidateWindowToLeftAlignWithSelection (HIMC hImc, ComponentPeer& peer, TextInputTarget* target) const
        {
            if (auto* targetComp = dynamic_cast<Component*> (target))
            {
                auto area = peer.getComponent().getLocalArea (targetComp, target->getCaretRectangle());

                CANDIDATEFORM pos = { 0, CFS_CANDIDATEPOS, { area.getX(), area.getBottom() }, { 0, 0, 0, 0 } };
                ImmSetCandidateWindow (hImc, &pos);
            }
        }

        JUCE_DECLARE_NON_COPYABLE (IMEHandler)
    };

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

    IMEHandler imeHandler;

    //==============================================================================
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (HWNDComponentPeer)
};

MultiTouchMapper<DWORD> HWNDComponentPeer::currentTouches;
ModifierKeys HWNDComponentPeer::modifiersAtLastCallback;

ComponentPeer* Component::createNewPeer (int styleFlags, void* parentHWND)
{
    return new HWNDComponentPeer (*this, styleFlags, (HWND) parentHWND, false);
}

JUCE_API ComponentPeer* createNonRepaintingEmbeddedWindowsPeer (Component& component, void* parentHWND)
{
    return new HWNDComponentPeer (component, ComponentPeer::windowIgnoresMouseClicks,
                                  (HWND) parentHWND, true);
}

JUCE_IMPLEMENT_SINGLETON (HWNDComponentPeer::WindowClassHolder)

//==============================================================================
bool KeyPress::isKeyCurrentlyDown (const int keyCode)
{
    auto k = (SHORT) keyCode;

    if ((keyCode & extendedKeyModifier) == 0)
    {
        if (k >= (SHORT) 'a' && k <= (SHORT) 'z')
            k += (SHORT) 'A' - (SHORT) 'a';

        // Only translate if extendedKeyModifier flag is not set
        const SHORT translatedValues[] = { (SHORT) ',', VK_OEM_COMMA,
                                           (SHORT) '+', VK_OEM_PLUS,
                                           (SHORT) '-', VK_OEM_MINUS,
                                           (SHORT) '.', VK_OEM_PERIOD,
                                           (SHORT) ';', VK_OEM_1,
                                           (SHORT) ':', VK_OEM_1,
                                           (SHORT) '/', VK_OEM_2,
                                           (SHORT) '?', VK_OEM_2,
                                           (SHORT) '[', VK_OEM_4,
                                           (SHORT) ']', VK_OEM_6 };

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

    return HWNDComponentPeer::isKeyDown (k);
}

// (This internal function is used by the plugin client module)
bool offerKeyMessageToJUCEWindow (MSG& m)   { return HWNDComponentPeer::offerKeyMessageToJUCEWindow (m); }

//==============================================================================
bool JUCE_CALLTYPE Process::isForegroundProcess()
{
    if (auto fg = GetForegroundWindow())
    {
        DWORD processID = 0;
        GetWindowThreadProcessId (fg, &processID);

        return processID == GetCurrentProcessId();
    }

    return true;
}

// N/A on Windows as far as I know.
void JUCE_CALLTYPE Process::makeForegroundProcess() {}
void JUCE_CALLTYPE Process::hide() {}

//==============================================================================
static BOOL CALLBACK enumAlwaysOnTopWindows (HWND hwnd, LPARAM lParam)
{
    if (IsWindowVisible (hwnd))
    {
        DWORD processID = 0;
        GetWindowThreadProcessId (hwnd, &processID);

        if (processID == GetCurrentProcessId())
        {
            WINDOWINFO info;

            if (GetWindowInfo (hwnd, &info)
                 && (info.dwExStyle & WS_EX_TOPMOST) != 0)
            {
                *reinterpret_cast<bool*> (lParam) = true;
                return FALSE;
            }
        }
    }

    return TRUE;
}

bool juce_areThereAnyAlwaysOnTopWindows()
{
    bool anyAlwaysOnTopFound = false;
    EnumWindows (&enumAlwaysOnTopWindows, (LPARAM) &anyAlwaysOnTopFound);
    return anyAlwaysOnTopFound;
}

//==============================================================================
class WindowsMessageBox  : public AsyncUpdater
{
public:
    WindowsMessageBox (AlertWindow::AlertIconType iconType,
                       const String& boxTitle, const String& m,
                       Component* associatedComponent, UINT extraFlags,
                       ModalComponentManager::Callback* cb, const bool runAsync)
        : flags (extraFlags | getMessageBoxFlags (iconType)),
          owner (getWindowForMessageBox (associatedComponent)),
          title (boxTitle), message (m), callback (cb)
    {
        if (runAsync)
            triggerAsyncUpdate();
    }

    int getResult() const
    {
        const int r = MessageBox (owner, message.toWideCharPointer(), title.toWideCharPointer(), flags);
        return (r == IDYES || r == IDOK) ? 1 : (r == IDNO && (flags & 1) != 0 ? 2 : 0);
    }

    void handleAsyncUpdate() override
    {
        const int result = getResult();

        if (callback != nullptr)
            callback->modalStateFinished (result);

        delete this;
    }

private:
    UINT flags;
    HWND owner;
    String title, message;
    std::unique_ptr<ModalComponentManager::Callback> callback;

    static UINT getMessageBoxFlags (AlertWindow::AlertIconType iconType) noexcept
    {
        UINT flags = MB_TASKMODAL | MB_SETFOREGROUND;

        // this window can get lost behind JUCE windows which are set to be alwaysOnTop
        // so if there are any set it to be topmost
        if (juce_areThereAnyAlwaysOnTopWindows())
            flags |= MB_TOPMOST;

        switch (iconType)
        {
            case AlertWindow::QuestionIcon:  flags |= MB_ICONQUESTION; break;
            case AlertWindow::WarningIcon:   flags |= MB_ICONWARNING; break;
            case AlertWindow::InfoIcon:      flags |= MB_ICONINFORMATION; break;
            case AlertWindow::NoIcon:        JUCE_FALLTHROUGH
            default: break;
        }

        return flags;
    }

    static HWND getWindowForMessageBox (Component* associatedComponent)
    {
        return associatedComponent != nullptr ? (HWND) associatedComponent->getWindowHandle() : nullptr;
    }
};

#if JUCE_MODAL_LOOPS_PERMITTED
void JUCE_CALLTYPE NativeMessageBox::showMessageBox (AlertWindow::AlertIconType iconType,
                                                     const String& title, const String& message,
                                                     Component* associatedComponent)
{
    WindowsMessageBox box (iconType, title, message, associatedComponent, MB_OK, nullptr, false);
    (void) box.getResult();
}
#endif

void JUCE_CALLTYPE NativeMessageBox::showMessageBoxAsync (AlertWindow::AlertIconType iconType,
                                                          const String& title, const String& message,
                                                          Component* associatedComponent,
                                                          ModalComponentManager::Callback* callback)
{
    new WindowsMessageBox (iconType, title, message, associatedComponent, MB_OK, callback, true);
}

bool JUCE_CALLTYPE NativeMessageBox::showOkCancelBox (AlertWindow::AlertIconType iconType,
                                                      const String& title, const String& message,
                                                      Component* associatedComponent,
                                                      ModalComponentManager::Callback* callback)
{
    std::unique_ptr<WindowsMessageBox> mb (new WindowsMessageBox (iconType, title, message, associatedComponent,
                                                                  MB_OKCANCEL, callback, callback != nullptr));
    if (callback == nullptr)
        return mb->getResult() != 0;

    mb.release();
    return false;
}

int JUCE_CALLTYPE NativeMessageBox::showYesNoCancelBox (AlertWindow::AlertIconType iconType,
                                                        const String& title, const String& message,
                                                        Component* associatedComponent,
                                                        ModalComponentManager::Callback* callback)
{
    std::unique_ptr<WindowsMessageBox> mb (new WindowsMessageBox (iconType, title, message, associatedComponent,
                                                                  MB_YESNOCANCEL, callback, callback != nullptr));
    if (callback == nullptr)
        return mb->getResult();

    mb.release();
    return 0;
}

int JUCE_CALLTYPE NativeMessageBox::showYesNoBox (AlertWindow::AlertIconType iconType,
                                                  const String& title, const String& message,
                                                  Component* associatedComponent,
                                                  ModalComponentManager::Callback* callback)
{
    std::unique_ptr<WindowsMessageBox> mb (new WindowsMessageBox (iconType, title, message, associatedComponent,
                                                                  MB_YESNO, callback, callback != nullptr));
    if (callback == nullptr)
        return mb->getResult();

    mb.release();
    return 0;
}

//==============================================================================
bool MouseInputSource::SourceList::addSource()
{
    auto numSources = sources.size();

    if (numSources == 0 || canUseMultiTouch())
    {
        addSource (numSources, numSources == 0 ? MouseInputSource::InputSourceType::mouse
                                               : MouseInputSource::InputSourceType::touch);
        return true;
    }

    return false;
}

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

Point<float> MouseInputSource::getCurrentRawMousePosition()
{
    POINT mousePos;
    GetCursorPos (&mousePos);

    auto p = pointFromPOINT (mousePos);

   #if JUCE_WIN_PER_MONITOR_DPI_AWARE
    if (isPerMonitorDPIAwareThread())
        p = Desktop::getInstance().getDisplays().physicalToLogical (p);
   #endif

    return p.toFloat();
}

void MouseInputSource::setRawMousePosition (Point<float> newPosition)
{
    auto newPositionInt = newPosition.roundToInt();

   #if JUCE_WIN_PER_MONITOR_DPI_AWARE
    if (isPerMonitorDPIAwareThread())
        newPositionInt = Desktop::getInstance().getDisplays().logicalToPhysical (newPositionInt);
   #endif

    auto point = POINTFromPoint (newPositionInt);
    SetCursorPos (point.x, point.y);
}

//==============================================================================
class ScreenSaverDefeater   : public Timer
{
public:
    ScreenSaverDefeater()
    {
        startTimer (10000);
        timerCallback();
    }

    void timerCallback() override
    {
        if (Process::isForegroundProcess())
        {
            INPUT input = {};
            input.type = INPUT_MOUSE;
            input.mi.mouseData = MOUSEEVENTF_MOVE;

            SendInput (1, &input, sizeof (INPUT));
        }
    }
};

static std::unique_ptr<ScreenSaverDefeater> screenSaverDefeater;

void Desktop::setScreenSaverEnabled (const bool isEnabled)
{
    if (isEnabled)
        screenSaverDefeater = nullptr;
    else if (screenSaverDefeater == nullptr)
        screenSaverDefeater.reset (new ScreenSaverDefeater());
}

bool Desktop::isScreenSaverEnabled()
{
    return screenSaverDefeater == nullptr;
}

//==============================================================================
void LookAndFeel::playAlertSound()
{
    MessageBeep (MB_OK);
}

//==============================================================================
void SystemClipboard::copyTextToClipboard (const String& text)
{
    if (OpenClipboard (nullptr) != 0)
    {
        if (EmptyClipboard() != 0)
        {
            auto bytesNeeded = CharPointer_UTF16::getBytesRequiredFor (text.getCharPointer()) + 4;

            if (bytesNeeded > 0)
            {
                if (auto bufH = GlobalAlloc (GMEM_MOVEABLE | GMEM_DDESHARE | GMEM_ZEROINIT, bytesNeeded + sizeof (WCHAR)))
                {
                    if (auto* data = static_cast<WCHAR*> (GlobalLock (bufH)))
                    {
                        text.copyToUTF16 (data, bytesNeeded);
                        GlobalUnlock (bufH);

                        SetClipboardData (CF_UNICODETEXT, bufH);
                    }
                }
            }
        }

        CloseClipboard();
    }
}

String SystemClipboard::getTextFromClipboard()
{
    String result;

    if (OpenClipboard (nullptr) != 0)
    {
        if (auto bufH = GetClipboardData (CF_UNICODETEXT))
        {
            if (auto* data = (const WCHAR*) GlobalLock (bufH))
            {
                result = String (data, (size_t) (GlobalSize (bufH) / sizeof (WCHAR)));
                GlobalUnlock (bufH);
            }
        }

        CloseClipboard();
    }

    return result;
}

//==============================================================================
void Desktop::setKioskComponent (Component* kioskModeComp, bool enableOrDisable, bool /*allowMenusAndBars*/)
{
    if (auto* tlw = dynamic_cast<TopLevelWindow*> (kioskModeComp))
        tlw->setUsingNativeTitleBar (! enableOrDisable);

    if (enableOrDisable)
        kioskModeComp->setBounds (getDisplays().findDisplayForRect (kioskModeComp->getScreenBounds()).totalArea);
}

void Desktop::allowedOrientationsChanged() {}

//==============================================================================
static const Displays::Display* getCurrentDisplayFromScaleFactor (HWND hwnd)
{
    Array<const Displays::Display*> candidateDisplays;
    double scaleToLookFor = -1.0;

    if (auto* peer = HWNDComponentPeer::getOwnerOfWindow (hwnd))
        scaleToLookFor = peer->getPlatformScaleFactor();
    else
        scaleToLookFor = getScaleFactorForWindow (hwnd);

    auto globalScale = Desktop::getInstance().getGlobalScaleFactor();

    for (auto& d : Desktop::getInstance().getDisplays().displays)
        if (approximatelyEqual (d.scale / globalScale, scaleToLookFor))
            candidateDisplays.add (&d);

    if (candidateDisplays.size() > 0)
    {
        if (candidateDisplays.size() == 1)
            return candidateDisplays[0];

        Rectangle<int> bounds;

        if (auto* peer = HWNDComponentPeer::getOwnerOfWindow (hwnd))
            bounds = peer->getComponent().getTopLevelComponent()->getBounds();
        else
            bounds = Desktop::getInstance().getDisplays().physicalToLogical (rectangleFromRECT (getWindowRect (hwnd)));

        const Displays::Display* retVal = nullptr;
        int maxArea = -1;

        for (auto* d : candidateDisplays)
        {
            auto intersection = d->totalArea.getIntersection (bounds);
            auto area = intersection.getWidth() * intersection.getHeight();

            if (area > maxArea)
            {
                maxArea = area;
                retVal = d;
            }
        }

        if (retVal != nullptr)
            return retVal;
    }

    return &Desktop::getInstance().getDisplays().getMainDisplay();
}

//==============================================================================
struct MonitorInfo
{
    MonitorInfo (bool main, RECT rect, double d) noexcept
        : isMain (main), bounds (rect), dpi (d) {}

    bool isMain;
    RECT bounds;
    double dpi;
};

static BOOL CALLBACK enumMonitorsProc (HMONITOR hm, HDC, LPRECT r, LPARAM userInfo)
{
    MONITORINFO info = {};
    info.cbSize = sizeof (info);
    GetMonitorInfo (hm, &info);

    auto isMain = (info.dwFlags & 1 /* MONITORINFOF_PRIMARY */) != 0;
    auto dpi = 0.0;

    if (getDPIForMonitor != nullptr)
    {
        UINT dpiX = 0, dpiY = 0;

        if (SUCCEEDED (getDPIForMonitor (hm, MDT_Default, &dpiX, &dpiY)))
            dpi = (dpiX + dpiY) / 2.0;
    }

    ((Array<MonitorInfo>*) userInfo)->add ({ isMain, *r, dpi });
    return TRUE;
}

void Displays::findDisplays (float masterScale)
{
    setDPIAwareness();

    Array<MonitorInfo> monitors;
    EnumDisplayMonitors (nullptr, nullptr, &enumMonitorsProc, (LPARAM) &monitors);

    auto globalDPI = getGlobalDPI();

    if (monitors.size() == 0)
        monitors.add ({ true, getWindowRect (GetDesktopWindow()), globalDPI });

    // make sure the first in the list is the main monitor
    for (int i = 1; i < monitors.size(); ++i)
        if (monitors.getReference (i).isMain)
            monitors.swap (i, 0);

    for (auto& monitor : monitors)
    {
        Display d;

        d.isMain = monitor.isMain;
        d.dpi = monitor.dpi;

        if (d.dpi == 0)
        {
            d.dpi = globalDPI;
            d.scale = masterScale;
        }
        else
        {
            d.scale = (d.dpi / USER_DEFAULT_SCREEN_DPI) * (masterScale / Desktop::getDefaultMasterScale());
        }

        d.userArea = d.totalArea = Rectangle<int>::leftTopRightBottom (monitor.bounds.left, monitor.bounds.top,
                                                                       monitor.bounds.right, monitor.bounds.bottom);

        if (d.isMain)
        {
            RECT workArea;
            SystemParametersInfo (SPI_GETWORKAREA, 0, &workArea, 0);

            d.userArea = d.userArea.getIntersection (Rectangle<int>::leftTopRightBottom (workArea.left, workArea.top,
                                                                                         workArea.right, workArea.bottom));
        }

        displays.add (d);
    }

   #if JUCE_WIN_PER_MONITOR_DPI_AWARE
    updateToLogical();
   #else
    for (auto& d : displays)
    {
        d.totalArea /= masterScale;
        d.userArea  /= masterScale;
    }
   #endif
}

//==============================================================================
static HICON extractFileHICON (const File& file)
{
    WORD iconNum = 0;
    WCHAR name[MAX_PATH * 2];
    file.getFullPathName().copyToUTF16 (name, sizeof (name));

    return ExtractAssociatedIcon ((HINSTANCE) Process::getCurrentModuleInstanceHandle(),
                                  name, &iconNum);
}

Image juce_createIconForFile (const File& file)
{
    Image image;

    if (auto icon = extractFileHICON (file))
    {
        image = IconConverters::createImageFromHICON (icon);
        DestroyIcon (icon);
    }

    return image;
}

//==============================================================================
void* CustomMouseCursorInfo::create() const
{
    const int maxW = GetSystemMetrics (SM_CXCURSOR);
    const int maxH = GetSystemMetrics (SM_CYCURSOR);

    Image im (image);
    int hotspotX = hotspot.x;
    int hotspotY = hotspot.y;

    if (im.getWidth() > maxW || im.getHeight() > maxH)
    {
        im = im.rescaled (maxW, maxH);

        hotspotX = (hotspotX * maxW) / juce::jmax (1, image.getWidth());
        hotspotY = (hotspotY * maxH) / juce::jmax (1, image.getHeight());
    }

    return IconConverters::createHICONFromImage (im, FALSE, hotspotX, hotspotY);
}

void MouseCursor::deleteMouseCursor (void* cursorHandle, bool isStandard)
{
    if (cursorHandle != nullptr && ! isStandard)
        DestroyCursor ((HCURSOR) cursorHandle);
}

enum
{
    hiddenMouseCursorHandle = 32500 // (arbitrary non-zero value to mark this type of cursor)
};

void* MouseCursor::createStandardMouseCursor (const MouseCursor::StandardCursorType type)
{
    LPCTSTR cursorName = IDC_ARROW;

    switch (type)
    {
        case NormalCursor:
        case ParentCursor:                  break;
        case NoCursor:                      return (void*) hiddenMouseCursorHandle;
        case WaitCursor:                    cursorName = IDC_WAIT; break;
        case IBeamCursor:                   cursorName = IDC_IBEAM; break;
        case PointingHandCursor:            cursorName = MAKEINTRESOURCE(32649); break;
        case CrosshairCursor:               cursorName = IDC_CROSS; break;

        case LeftRightResizeCursor:
        case LeftEdgeResizeCursor:
        case RightEdgeResizeCursor:         cursorName = IDC_SIZEWE; break;

        case UpDownResizeCursor:
        case TopEdgeResizeCursor:
        case BottomEdgeResizeCursor:        cursorName = IDC_SIZENS; break;

        case TopLeftCornerResizeCursor:
        case BottomRightCornerResizeCursor: cursorName = IDC_SIZENWSE; break;

        case TopRightCornerResizeCursor:
        case BottomLeftCornerResizeCursor:  cursorName = IDC_SIZENESW; break;

        case UpDownLeftRightResizeCursor:   cursorName = IDC_SIZEALL; break;

        case DraggingHandCursor:
        {
            static void* dragHandCursor = nullptr;

            if (dragHandCursor == nullptr)
            {
                static const unsigned char dragHandData[] =
                    { 71,73,70,56,57,97,16,0,16,0,145,2,0,0,0,0,255,255,255,0,0,0,0,0,0,33,249,4,1,0,0,2,0,44,0,0,0,0,16,0,
                      16,0,0,2,52,148,47,0,200,185,16,130,90,12,74,139,107,84,123,39,132,117,151,116,132,146,248,60,209,138,
                      98,22,203,114,34,236,37,52,77,217,247,154,191,119,110,240,193,128,193,95,163,56,60,234,98,135,2,0,59 };

                dragHandCursor = CustomMouseCursorInfo (ImageFileFormat::loadFrom (dragHandData, sizeof (dragHandData)), { 8, 7 }).create();
            }

            return dragHandCursor;
        }

        case CopyingCursor:
        {
            static void* copyCursor = nullptr;

            if (copyCursor == nullptr)
            {
                static unsigned char copyCursorData[] = {
                    71,73,70,56,57,97,21,0,21,0,145,0,0,0,0,0,255,255,255,0,128,128,255,255,255,33,249,4,1,0,0,3,0,44,0,0,0,0,21,0,
                    21,0,0,2,72,4,134,169,171,16,199,98,11,79,90,71,161,93,56,111,78,133,218,215,137,31,82,154,100,200,86,91,202,142,
                    12,108,212,87,235,174, 15,54,214,126,237,226,37,96,59,141,16,37,18,201,142,157,230,204,51,112,252,114,147,74,83,
                    5,50,68,147,208,217,16,71,149,252,124,5,0,59,0,0
                };
                const int copyCursorSize = 119;

                copyCursor = CustomMouseCursorInfo (ImageFileFormat::loadFrom (copyCursorData, copyCursorSize), { 1, 3 }).create();
            }

            return copyCursor;
        }

        case NumStandardCursorTypes: JUCE_FALLTHROUGH
        default:
            jassertfalse; break;
    }

    if (auto cursorH = LoadCursor (nullptr, cursorName))
        return cursorH;

    return LoadCursor (nullptr, IDC_ARROW);
}

//==============================================================================
void MouseCursor::showInWindow (ComponentPeer*) const
{
    auto c = (HCURSOR) getHandle();

    if (c == nullptr)
        c = LoadCursor (nullptr, IDC_ARROW);
    else if (c == (HCURSOR) hiddenMouseCursorHandle)
        c = nullptr;

    SetCursor (c);
}

JUCE_END_IGNORE_WARNINGS_GCC_LIKE

} // namespace juce