source/modules/juce_events/native/juce_win32_WinRTWrapper.h

   1 /*
   2   ==============================================================================
   3
   4    This file is part of the JUCE library.
   5    Copyright (c) 2022 - Raw Material Software Limited
   6
   7    JUCE is an open source library subject to commercial or open-source
   8    licensing.
   9
  10    The code included in this file is provided under the terms of the ISC license
  11    http://www.isc.org/downloads/software-support-policy/isc-license. Permission
  12    To use, copy, modify, and/or distribute this software for any purpose with or
  13    without fee is hereby granted provided that the above copyright notice and
  14    this permission notice appear in all copies.
  15
  16    JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
  17    EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
  18    DISCLAIMED.
  19
  20   ==============================================================================
  21 */
  22
  23 namespace juce
  24 {
  25
  26 class WinRTWrapper :   public DeletedAtShutdown
  27 {
  28 public:
  29     //==============================================================================
  30     ~WinRTWrapper();
  31     bool isInitialised() const noexcept  { return initialised; }
  32
  33     JUCE_DECLARE_SINGLETON (WinRTWrapper, true)
  34
  35     //==============================================================================
  36     template <class ComClass>
  37     ComSmartPtr<ComClass> activateInstance (const wchar_t* runtimeClassID, REFCLSID classUUID)
  38     {
  39         ComSmartPtr<ComClass> result;
  40
  41         if (isInitialised())
  42         {
  43             ComSmartPtr<IInspectable> inspectable;
  44             ScopedHString runtimeClass (runtimeClassID);
  45             auto hr = roActivateInstance (runtimeClass.get(), inspectable.resetAndGetPointerAddress());
  46
  47             if (SUCCEEDED (hr))
  48                 inspectable->QueryInterface (classUUID, (void**) result.resetAndGetPointerAddress());
  49         }
  50
  51         return result;
  52     }
  53
  54     template <class ComClass>
  55     ComSmartPtr<ComClass> getWRLFactory (const wchar_t* runtimeClassID)
  56     {
  57         ComSmartPtr<ComClass> comPtr;
  58
  59         if (isInitialised())
  60         {
  61             ScopedHString classID (runtimeClassID);
  62
  63             if (classID.get() != nullptr)
  64                 roGetActivationFactory (classID.get(), __uuidof (ComClass), (void**) comPtr.resetAndGetPointerAddress());
  65         }
  66
  67         return comPtr;
  68     }
  69
  70     //==============================================================================
  71     class ScopedHString
  72     {
  73     public:
  74         ScopedHString (String);
  75         ~ScopedHString();
  76
  77         HSTRING get() const noexcept          { return hstr; }
  78
  79     private:
  80         HSTRING hstr = nullptr;
  81
  82         JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ScopedHString)
  83     };
  84
  85     String hStringToString (HSTRING);
  86
  87 private:
  88     WinRTWrapper();
  89
  90     //==============================================================================
  91     HMODULE winRTHandle = nullptr;
  92     bool initialised = false;
  93
  94     typedef HRESULT (WINAPI* RoInitializeFuncPtr) (int);
  95     typedef HRESULT (WINAPI* WindowsCreateStringFuncPtr) (LPCWSTR, UINT32, HSTRING*);
  96     typedef HRESULT (WINAPI* WindowsDeleteStringFuncPtr) (HSTRING);
  97     typedef PCWSTR  (WINAPI* WindowsGetStringRawBufferFuncPtr) (HSTRING, UINT32*);
  98     typedef HRESULT (WINAPI* RoActivateInstanceFuncPtr) (HSTRING, IInspectable**);
  99     typedef HRESULT (WINAPI* RoGetActivationFactoryFuncPtr) (HSTRING, REFIID, void**);
 100
 101     RoInitializeFuncPtr roInitialize = nullptr;
 102     WindowsCreateStringFuncPtr createHString = nullptr;
 103     WindowsDeleteStringFuncPtr deleteHString = nullptr;
 104     WindowsGetStringRawBufferFuncPtr getHStringRawBuffer = nullptr;
 105     RoActivateInstanceFuncPtr roActivateInstance = nullptr;
 106     RoGetActivationFactoryFuncPtr roGetActivationFactory = nullptr;
 107
 108     //==============================================================================
 109     JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (WinRTWrapper)
 110 };
 111
 112 } // namespace juce