juce_win32_UIAGridProvider.h

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/*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited
 
   JUCE is an open source library subject to commercial or open-source
   licensing.
 
   By using JUCE, you agree to the terms of both the JUCE 7 End-User License
   Agreement and JUCE Privacy Policy.
 
   End User License Agreement: www.juce.com/juce-7-licence
   Privacy Policy: www.juce.com/juce-privacy-policy
 
   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).
 
   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.
 
  ==============================================================================
*/
 
namespace juce
{
 
//==============================================================================
class UIAGridProvider  : public UIAProviderBase,
                         public ComBaseClassHelper<ComTypes::IGridProvider>
{
public:
    using UIAProviderBase::UIAProviderBase;
 
    //==============================================================================
    JUCE_COMRESULT GetItem (int row, int column, IRawElementProviderSimple** pRetVal) override
    {
        return withTableInterface (pRetVal, [&] (const AccessibilityTableInterface& tableInterface)
        {
            if (! isPositiveAndBelow (row, tableInterface.getNumRows())
                || ! isPositiveAndBelow (column, tableInterface.getNumColumns()))
                return E_INVALIDARG;
 
            JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wlanguage-extension-token")
 
            if (auto* handler = tableInterface.getCellHandler (row, column))
                handler->getNativeImplementation()->QueryInterface (IID_PPV_ARGS (pRetVal));
 
            JUCE_END_IGNORE_WARNINGS_GCC_LIKE
 
            return S_OK;
        });
    }
 
    JUCE_COMRESULT get_RowCount (int* pRetVal) override
    {
        return withTableInterface (pRetVal, [&] (const AccessibilityTableInterface& tableInterface)
        {
            *pRetVal = tableInterface.getNumRows();
            return S_OK;
        });
    }
 
    JUCE_COMRESULT get_ColumnCount (int* pRetVal) override
    {
        return withTableInterface (pRetVal, [&] (const AccessibilityTableInterface& tableInterface)
        {
            *pRetVal = tableInterface.getNumColumns();
            return S_OK;
        });
    }
 
private:
    template <typename Value, typename Callback>
    JUCE_COMRESULT withTableInterface (Value* pRetVal, Callback&& callback) const
    {
        return withCheckedComArgs (pRetVal, *this, [&]() -> HRESULT
        {
            if (auto* tableInterface = getHandler().getTableInterface())
                return callback (*tableInterface);
 
            return (HRESULT) UIA_E_NOTSUPPORTED;
        });
    }
 
    //==============================================================================
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (UIAGridProvider)
};
 
} // namespace juce