Fix code that checks whether hard links can be pasted

In 79e5e09, the code that checks to see
whether a hard link can be pasted was updated to simply check whether
the current folder is a filesystem folder. That's not correct, though,
as there needs to be data in the appropriate format on the clipboard.

Prior to that change, there was a check to see whether data could be
pasted. That isn't correct either, though. It's not enough to know that
data can be pasted, since:

- The data needs to be in a specific format (CF_HDROP).
- The paste needs to occur in a filesystem folder.

Therefore, the code that checks to see whether a hard link can be pasted
has been updated to verify the above items.

Explorer++/Explorer++/DirectoryOperationsHelper.cpp

@@ -66,9 +66,9 @@ bool CanPasteInDirectory(PCIDLIST_ABSOLUTE pidl, PasteType pasteType)
 		|| (pasteType == PasteType::Normal && CanPasteCustomDataInDirectory(pidl));
 }
 
-bool CanCreateHardLinkInDirectory(PCIDLIST_ABSOLUTE pidl)
+bool CanPasteHardLinkInDirectory(PCIDLIST_ABSOLUTE pidl)
 {
-	return IsFilesystemFolder(pidl);
+	return IsClipboardFormatAvailable(CF_HDROP) && IsFilesystemFolder(pidl);
 }
 
 bool CanCreateInDirectory(PCIDLIST_ABSOLUTE pidl)

Explorer++/Explorer++/DirectoryOperationsHelper.h

@@ -7,6 +7,6 @@
 #include "../Helper/ClipboardHelper.h"
 
 bool CanPasteInDirectory(PCIDLIST_ABSOLUTE pidl, PasteType pasteType);
-bool CanCreateHardLinkInDirectory(PCIDLIST_ABSOLUTE pidl);
+bool CanPasteHardLinkInDirectory(PCIDLIST_ABSOLUTE pidl);
 bool CanCreateInDirectory(PCIDLIST_ABSOLUTE pidl);
 bool CanCustomizeDirectory(PCIDLIST_ABSOLUTE pidl);

Explorer++/Explorer++/Explorer++.h

@@ -470,7 +470,7 @@ class Explorerplusplus :
 	BOOL CanDelete() const override;
 	BOOL CanShowFileProperties() const override;
 	BOOL CanPaste(PasteType pasteType) const override;
-	bool CanCreateHardLink() const;
+	bool CanPasteHardLink() const;
 	BOOL TestItemAttributes(SFGAOF attributes) const;
 	HRESULT GetSelectionAttributes(SFGAOF *pItemAttributes) const;
 	PidlAbsolute MaybeGetFocusedDirectory() const;

Explorer++/Explorer++/FileSelectionTests.cpp

@@ -118,10 +118,10 @@ BOOL Explorerplusplus::CanPaste(PasteType pasteType) const
 	return CanPasteInDirectory(directory.Raw(), pasteType);
 }
 
-bool Explorerplusplus::CanCreateHardLink() const
+bool Explorerplusplus::CanPasteHardLink() const
 {
 	const auto *activeShellBrowser = GetActiveShellBrowserImpl();
-	return CanCreateHardLinkInDirectory(activeShellBrowser->GetDirectoryIdl().get());
+	return CanPasteHardLinkInDirectory(activeShellBrowser->GetDirectoryIdl().get());
 }
 
 PidlAbsolute Explorerplusplus::MaybeGetFocusedDirectory() const

Explorer++/Explorer++/HandleWindowState.cpp

@@ -52,7 +52,7 @@ void Explorerplusplus::SetProgramMenuItemStates(HMENU hProgramMenu)
 	MenuHelper::EnableItem(hProgramMenu, IDM_EDIT_UNDO, m_FileActionHandler.CanUndo());
 	MenuHelper::EnableItem(hProgramMenu, IDM_EDIT_PASTE, CanPaste(PasteType::Normal));
 	MenuHelper::EnableItem(hProgramMenu, IDM_EDIT_PASTESHORTCUT, CanPaste(PasteType::Shortcut));
-	MenuHelper::EnableItem(hProgramMenu, IDM_EDIT_PASTEHARDLINK, CanCreateHardLink());
+	MenuHelper::EnableItem(hProgramMenu, IDM_EDIT_PASTEHARDLINK, CanPasteHardLink());
 
 	/* The following menu items are only enabled when one
 	or more files are selected (they represent file