[PowerRename] Handle many items w/o crashing and OOM (#26761)

* [PowerRename] Disable AnimatedIcon (check mark) for CheckBox to prevent crashes
* [PowerRename] Implement lightweight ExplorerItemsSource/VM

src/modules/powerrename/PowerRenameUILib/ExplorerItemViewModel.cpp

@@ -0,0 +1,123 @@
+#include "pch.h"
+
+#include <functional>
+
+#include "ExplorerItemViewModel.h"
+#if __has_include("ExplorerItemViewModel.g.cpp")
+#include "ExplorerItemViewModel.g.cpp"
+#endif
+#include <PowerRenameManager.h>
+#include <Renaming.h>
+
+extern CComPtr<IPowerRenameManager> g_prManager;
+extern std::function<void(void)> g_itemToggledCallback;
+
+namespace
+{
+    const wchar_t fileImagePath[] = L"ms-appx:///Assets/file.png";
+    const wchar_t folderImagePath[] = L"ms-appx:///Assets/folder.png";
+}
+
+namespace winrt::PowerRenameUI::implementation
+{
+    winrt::event_token ExplorerItemViewModel::PropertyChanged(winrt::Microsoft::UI::Xaml::Data::PropertyChangedEventHandler const& handler)
+    {
+        return m_propertyChanged.add(handler);
+    }
+
+    void ExplorerItemViewModel::PropertyChanged(winrt::event_token const& token) noexcept
+    {
+        m_propertyChanged.remove(token);
+    }
+    ExplorerItemViewModel::ExplorerItemViewModel(const uint32_t _index) :
+        _index{ _index }
+    {
+    }
+
+    int32_t ExplorerItemViewModel::IdVM()
+    {
+        return _index;
+    }
+    hstring ExplorerItemViewModel::IdStrVM()
+    {
+        return to_hstring(_index);
+    }
+    hstring ExplorerItemViewModel::OriginalVM()
+    {
+        CComPtr<IPowerRenameItem> spItem;
+        winrt::check_hresult(g_prManager->GetItemByIndex(_index, &spItem));
+
+        PWSTR originalName = nullptr;
+        winrt::check_hresult(spItem->GetOriginalName(&originalName));
+
+        return hstring{ originalName };
+    }
+    hstring ExplorerItemViewModel::RenamedVM()
+    {
+        CComPtr<IPowerRenameItem> spItem;
+        winrt::check_hresult(g_prManager->GetItemByIndex(_index, &spItem));
+
+        PWSTR newName = nullptr;
+        spItem->GetNewName(&newName);
+        if (!newName)
+        {
+            return L"";
+        }
+        else
+        {
+            hstring result{ newName };
+            SHFree(newName);
+
+            return result;
+        }
+    }
+
+    double ExplorerItemViewModel::IndentationVM()
+    {
+        CComPtr<IPowerRenameItem> spItem;
+        winrt::check_hresult(g_prManager->GetItemByIndex(_index, &spItem));
+
+        UINT depth = 0;
+        spItem->GetDepth(&depth);
+
+        return static_cast<double>(depth) * 12;
+    }
+    hstring ExplorerItemViewModel::ImagePathVM()
+    {
+        return TypeVM() ? fileImagePath : folderImagePath;
+    }
+    int32_t ExplorerItemViewModel::TypeVM()
+    {
+        CComPtr<IPowerRenameItem> spItem;
+        winrt::check_hresult(g_prManager->GetItemByIndex(_index, &spItem));
+
+        bool isFolder = false;
+        spItem->GetIsFolder(&isFolder);
+        return isFolder ? 0 : 1;
+    }
+
+    bool ExplorerItemViewModel::CheckedVM()
+    {
+        CComPtr<IPowerRenameItem> spItem;
+        winrt::check_hresult(g_prManager->GetItemByIndex(_index, &spItem));
+        bool result = false;
+        winrt::check_hresult(spItem->GetSelected(&result));
+        return result;
+    }
+    void ExplorerItemViewModel::CheckedVM(bool value)
+    {
+        CComPtr<IPowerRenameItem> spItem;
+        winrt::check_hresult(g_prManager->GetItemByIndex(_index, &spItem));
+        winrt::check_hresult(spItem->PutSelected(value));
+        g_itemToggledCallback();
+    }
+
+    int32_t ExplorerItemViewModel::StateVM()
+    {
+        CComPtr<IPowerRenameItem> spItem;
+        winrt::check_hresult(g_prManager->GetItemByIndex(_index, &spItem));
+        PowerRenameItemRenameStatus status {};
+        spItem->GetStatus(&status);
+        return static_cast<int32_t>(status);
+    }
+}