AccessibilityUtils.cpp

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/*  SPDX-License-Identifier: GPL-2.0-or-later */
/*!********************************************************************
 
  Audacity: A Digital Audio Editor
 
  AccessibilityUtils.cpp
 
  Dmitry Vedenko
 
**********************************************************************/
 
#include "AccessibilityUtils.h"
 
#include <deque>
#include <tuple>
#include <type_traits>
 
#include <wx/window.h>
 
#include <wx/checkbox.h>
#include <wx/choice.h>
#include <wx/radiobut.h>
#include <wx/slider.h>
#include <wx/statbox.h>
#include <wx/textctrl.h>
 
#if wxUSE_ACCESSIBILITY
#   include "WindowAccessible.h"
#endif
 
template<typename... Types>
bool IsOfType(wxWindow* window)
{
   std::tuple<std::add_pointer_t<Types>...> types;
 
   return std::apply(
      [window](auto... args) -> bool
      { return ((dynamic_cast<decltype(args)>(window) != nullptr) || ...); },
      types);
}
 
void SetupAccessibility(wxWindow* window)
{
   std::deque<wxWindow*> elementsQueue;
   elementsQueue.push_back(window);
 
   while (!elementsQueue.empty())
   {
      auto element = elementsQueue.front();
      elementsQueue.pop_front();
 
      for (auto child : element->GetChildren())
         elementsQueue.push_back(child);
 
#if wxUSE_ACCESSIBILITY
      if (element->GetAccessible() == nullptr)
      {
         if (IsOfType<
                wxCheckBox, wxChoice, wxSlider, wxTextCtrl, wxStaticBox,
                wxRadioButton>(element))
            element->SetAccessible(safenew WindowAccessible(element));
      }
#endif
 
      const auto label = element->GetLabel();
 
      if (!label.empty())
         element->SetName(wxStripMenuCodes(label));
   }
}