LangSoundTSF/LangSound.cpp at master · svtv/LangSoundTSF · GitHub

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#define WIN32_LEAN_AND_MEAN
#include <windows.h>

#include "LangSound.h"

#include <mmsystem.h>

#include "Globals.h"
#include "resource.h"

LangSound::LangSound()
	: _refCount(1)
	, _clientId(0)
	, _sinkCookie(TF_INVALID_COOKIE)
	, _lastProfileGuid(std::nullopt)
{
	_threadMgr.Reset();

	DllAddRef();
}

LangSound::~LangSound()
{
	DllRelease();
}

ULONG LangSound::AddRef()
{
	return InterlockedIncrement(&_refCount);
}

ULONG LangSound::Release()
{
	const LONG r = InterlockedDecrement(&_refCount);
	if (!r)
		delete this;
	return r;
}

HRESULT LangSound::QueryInterface(REFIID riid, void** ppv)
{
	if (riid == IID_IUnknown ||
		riid == IID_ITfTextInputProcessor)
	{
		*ppv = static_cast<ITfTextInputProcessor*>(this);
	}
	else if (riid ==
		IID_ITfActiveLanguageProfileNotifySink)
	{
		*ppv =
			static_cast<ITfActiveLanguageProfileNotifySink*>(this);
	}
	else
	{
		*ppv = nullptr;
		return E_NOINTERFACE;
	}

	AddRef();
	return S_OK;
}

HRESULT LangSound::Activate(ITfThreadMgr* ptim, TfClientId tid)
{
	_threadMgr = ptim;
	_clientId = tid;

	const HRESULT hrProfiles = CoCreateInstance(
		CLSID_TF_InputProcessorProfiles,
		nullptr,
		CLSCTX_INPROC_SERVER,
		IID_ITfInputProcessorProfiles,
		reinterpret_cast<void**>(_profiles.ReleaseAndGetAddressOf()));
	if (FAILED(hrProfiles))
		_profiles.Reset();

	Microsoft::WRL::ComPtr<ITfSource> source;
	if (SUCCEEDED(_threadMgr.As(&source)))
	{
		const HRESULT hr = source->AdviseSink(
			IID_ITfActiveLanguageProfileNotifySink,
			static_cast<ITfActiveLanguageProfileNotifySink*>(this),
			&_sinkCookie);
		if (FAILED(hr))
			_sinkCookie = TF_INVALID_COOKIE;
	}

	return S_OK;
}

HRESULT LangSound::Deactivate()
{
	if (_threadMgr)
	{
		Microsoft::WRL::ComPtr<ITfSource> source;
		if (SUCCEEDED(_threadMgr.As(&source)))
		{
			if (_sinkCookie != TF_INVALID_COOKIE)
			{
				source->UnadviseSink(_sinkCookie);
				_sinkCookie = TF_INVALID_COOKIE;
			}
		}

		_threadMgr.Reset();
		_profiles.Reset();
	}

	return S_OK;
}

HRESULT LangSound::OnActivated(REFCLSID clsid, REFGUID guidProfile, BOOL activated)
{
	if (!activated)
		return S_OK;

	if (!IsEqualGUID(clsid, CLSID_LangSound))
		return S_OK;

	LANGID lang = 0;
	if (_profiles)
	{
		GUID activeGuid = {};
		(void)_profiles->GetActiveLanguageProfile(CLSID_LangSound, &lang, &activeGuid);
	}
	if (lang == 0)
	{
		const HKL layout = GetKeyboardLayout(0);
		lang = LOWORD(reinterpret_cast<DWORD_PTR>(layout));
	}

	HKL defaultLayout = nullptr;
	LANGID defaultLang;
	if (SystemParametersInfoW(SPI_GETDEFAULTINPUTLANG, 0, (PVOID)&defaultLayout, 0))
		defaultLang = LOWORD(reinterpret_cast<DWORD_PTR>(defaultLayout));
	else
		defaultLang = lang;

	if (!_lastProfileGuid.has_value())
	{
		_lastProfileGuid = guidProfile;
		return S_OK;
	}

	if (IsEqualGUID(*_lastProfileGuid, guidProfile))
		return S_OK;

	const int soundResId = (lang != defaultLang)
		? IDR_WAVE_LANGSOUND_NONDEFAULT
		: IDR_WAVE_LANGSOUND_DEFAULT;
	PlaySoundW(
		MAKEINTRESOURCEW(soundResId),
		g_hInst,
		SND_RESOURCE |
			SND_ASYNC |
			SND_NODEFAULT |
			SND_SENTRY |
			SND_SYSTEM);

	_lastProfileGuid = guidProfile;

	return S_OK;
}