qt-everywhere-src-5.15.1/qtbase/src/plugins/platforms/winrt/qwinrtcanvas.cpp

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#include "qwinrtcanvas.h"
#include "uiautomation/qwinrtuiaaccessibility.h"
#include "uiautomation/qwinrtuiamainprovider.h"
#include "uiautomation/qwinrtuiametadatacache.h"
#include "uiautomation/qwinrtuiautils.h"

#include <QtCore/QLoggingCategory>
#include <QtCore/qfunctions_winrt.h>

using namespace Microsoft::WRL;
using namespace Microsoft::WRL::Wrappers;
using namespace ABI::Windows::Foundation;
using namespace ABI::Windows::System;
using namespace ABI::Windows::UI;
using namespace ABI::Windows::UI::Core;
using namespace ABI::Windows::UI::Xaml;
using namespace ABI::Windows::Foundation;
using namespace ABI::Windows::Foundation::Collections;

QT_BEGIN_NAMESPACE

QWinRTCanvas::QWinRTCanvas(const std::function<QWindow*()> &delegateWindow)
{
    ComPtr<Xaml::Controls::ICanvasFactory> factory;
    HRESULT hr = RoGetActivationFactory(HString::MakeReference(RuntimeClass_Windows_UI_Xaml_Controls_Canvas).Get(), IID_PPV_ARGS(&factory));
    Q_ASSERT_SUCCEEDED(hr);

    hr = factory->CreateInstance(this, &m_base, &m_core);
    Q_ASSERT_SUCCEEDED(hr);

    delegate = delegateWindow;
}

HRESULT STDMETHODCALLTYPE QWinRTCanvas::QueryInterface(REFIID iid, LPVOID *iface)
{
    if (!iface)
        return E_POINTER;
    *iface = nullptr;

    if (iid == IID_IUnknown) {
        *iface = static_cast<Xaml::IUIElementOverrides *>(this);
        AddRef();
        return S_OK;
    } else if (iid == Xaml::IID_IUIElementOverrides) {
        *iface = static_cast<Xaml::IUIElementOverrides *>(this);
        AddRef();
        return S_OK;
    } else {
        return m_base.CopyTo(iid, iface);
    }
}

HRESULT STDMETHODCALLTYPE QWinRTCanvas::GetIids(ULONG *iidCount, IID **iids)
{
    *iidCount = 0;
    *iids = nullptr;
    return S_OK;
}

HRESULT STDMETHODCALLTYPE QWinRTCanvas::GetRuntimeClassName(HSTRING *className)
{
    const wchar_t *name = L"QWinRTCanvas";
    return ::WindowsCreateString(name, static_cast<UINT32>(::wcslen(name)), className);
}

HRESULT STDMETHODCALLTYPE QWinRTCanvas::GetTrustLevel(TrustLevel *trustLevel)
{
    *trustLevel = TrustLevel::BaseTrust;
    return S_OK;
}

HRESULT STDMETHODCALLTYPE QWinRTCanvas::OnCreateAutomationPeer(Xaml::Automation::Peers::IAutomationPeer **returnValue)
{
    if (!returnValue)
        return E_INVALIDARG;
    *returnValue = nullptr;

    if (delegate) {
        if (QWindow *window = delegate()) {
            QWinRTUiaAccessibility::activate();
            if (QAccessibleInterface *accessible = window->accessibleRoot()) {
                QAccessible::Id accid = QWinRTUiAutomation::idForAccessible(accessible);
                QWinRTUiaMetadataCache::instance()->load(accid);
                if (ComPtr<QWinRTUiaMainProvider> provider = QWinRTUiaMainProvider::providerForAccessibleId(accid))
                    return provider.CopyTo(returnValue);
            }
        }
    }
    return m_base->OnCreateAutomationPeer(returnValue);
}

HRESULT STDMETHODCALLTYPE QWinRTCanvas::OnDisconnectVisualChildren()
{
    return m_base->OnDisconnectVisualChildren();
}

HRESULT STDMETHODCALLTYPE QWinRTCanvas::FindSubElementsForTouchTargeting(Point point, Rect boundingRect, IIterable<IIterable<ABI::Windows::Foundation::Point>*> **returnValue)
{
    return m_base->FindSubElementsForTouchTargeting(point, boundingRect, returnValue);
}

QT_END_NAMESPACE