[TSF-Application]How to obtain the localized name of the text service (TIP)

Question

Answer 1

To obtain the localized name of the text service use ITfInputProcessorProfiles::GetLanguageProfileDescription
https://learn.microsoft.com/en-us/windows/win32/api/msctf/nf-msctf-itfinputprocessorprofiles-getlanguageprofiledescription
To obtain the localized name of the keyboard layout, see the code below.
To obtain the localized name of the LANGID, see the code below.

Answer 2

/**
 * @brief Get the locale of the input processor
 *
 * @param BSTR* Pointer to a BSTR value that receives the locale string. The caller is responsible for freeing
 * this memory using SysFreeString when it is no longer required.
 */
HRESULT libtf_get_input_processor_locale(libtf_InputProcessorProfile_t profile, BSTR* locale)
{
    LCID    lcid = MAKELCID(profile.langid, SORT_DEFAULT);
    wchar_t buf[85];
    GetLocaleInfoW(lcid, LOCALE_SNAME, buf, 85);
    *locale = SysAllocString(buf);
    return S_OK;
}

/**
 * @brief Get the localized name of the locale
 *
 * @param BSTR locale
 * @param BSTR* Pointer to a BSTR value that receives the name string. The caller is responsible for freeing
 * this memory using SysFreeString when it is no longer required.
 */
HRESULT libtf_get_locale_name(BSTR locale, BSTR* name)
{
    wchar_t buf[128];
    GetLocaleInfoEx(locale, LOCALE_SLOCALIZEDDISPLAYNAME, buf, 128);
    *name = SysAllocString(buf);
    return S_OK;
}

/**
 * @brief Get the localized name of the input processor
 *
 * @param BSTR Pointer to a BSTR value that receives the description string. The caller is responsible for freeing this
 * memory using SysFreeString when it is no longer required.
 */
HRESULT libtf_get_input_processor_desc(libtf_InputProcessorProfile_t profile, BSTR* desc)
{
    switch (profile.dwProfileType) {
        case TF_PROFILETYPE_INPUTPROCESSOR: {
            CComPtr<ITfInputProcessorProfiles> inputProcessorProfiles;
            CHECK_HR(createInputProcessorProfiles(&inputProcessorProfiles));

            CHECK_HR(inputProcessorProfiles->GetLanguageProfileDescription(
                profile.clsid, profile.langid, profile.guidProfile, desc));
        } break;
        case TF_PROFILETYPE_KEYBOARDLAYOUT: {
            HKEY layouts;
            CHECK_ES(RegOpenKeyEx(HKEY_LOCAL_MACHINE,
                                  TEXT("SYSTEM\\CurrentControlSet\\Control\\Keyboard Layouts"),
                                  0,
                                  KEY_READ,
                                  &layouts));

            HRESULT hr;
            // the key of the keyboard layout is its langid
            char layoutKey[9];
            snprintf(layoutKey, 9, "%08x", profile.langid);
            HKEY layout;
            if (NOT_ES(hr = RegOpenKeyExA(layouts, layoutKey, 0, KEY_READ, &layout))) goto CloseParentKey;

            DWORD size;
            // Get data size first
            if (NOT_ES(
                    hr = RegGetValueW(
                        layout, NULL, L"Layout Display Name", RRF_RT_REG_EXPAND_SZ | RRF_NOEXPAND, NULL, NULL, &size)))
                goto CloseSubKey;

            {
                std::unique_ptr<uint8_t[]> buf(new uint8_t[size]);
                // Get resource key of the name
                if (NOT_ES(hr = RegGetValueW(layout,
                                             NULL,
                                             L"Layout Display Name",
                                             RRF_RT_REG_EXPAND_SZ | RRF_NOEXPAND,
                                             NULL,
                                             buf.get(),
                                             &size)))
                    goto CloseSubKey;

                // Get the layout name by resource key
                std::unique_ptr<wchar_t[]> layoutName(new wchar_t[KL_NAMELENGTH]);
                if (FAILED(hr = SHLoadIndirectString((wchar_t*)buf.get(), layoutName.get(), KL_NAMELENGTH, NULL)))
                    goto CloseSubKey;

                // Return result
                *desc = SysAllocString(layoutName.get());
                CHECK_OOM(*desc);
            }
        CloseSubKey:
            RegCloseKey(layout);
        CloseParentKey:
            RegCloseKey(layouts);
            return hr;
        } break;
        default: return E_INVALIDARG;
    }
    return S_OK;
}