reactos/dll/shellext/fontext/CEnumFonts.cpp

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/*
* PROJECT: ReactOS Font Shell Extension
* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
* PURPOSE: CEnumFonts implementation
* COPYRIGHT: Copyright 2019 Mark Jansen <mark.jansen@reactos.org>
*/
#include "precomp.h"
WINE_DEFAULT_DEBUG_CHANNEL(fontext);
class CEnumFonts :
public CComObjectRootEx<CComMultiThreadModelNoCS>,
public IEnumIDList
{
private:
DWORD m_dwFlags;
ULONG m_Index;
public:
CEnumFonts()
:m_dwFlags(0)
,m_Index(0)
{
}
STDMETHODIMP Initialize(CFontExt* folder, DWORD flags)
{
m_dwFlags = flags;
m_Index = 0;
return S_OK;
}
// *** IEnumIDList methods ***
STDMETHODIMP Next(ULONG celt, LPITEMIDLIST *rgelt, ULONG *pceltFetched)
{
if (!rgelt || (!pceltFetched && celt != 1))
return E_POINTER;
HRESULT hr = S_OK;
ULONG Fetched = 0;
while (celt)
{
celt--;
if (m_Index < g_FontCache->Size())
{
CStringW Name = g_FontCache->Name(m_Index);
LPITEMIDLIST item = _ILCreate(Name, m_Index);
if (!item)
{
hr = Fetched ? S_FALSE : E_OUTOFMEMORY;
break;
}
rgelt[Fetched] = item;
m_Index++;
Fetched++;
}
else
{
hr = S_FALSE;
}
}
if (pceltFetched)
*pceltFetched = Fetched;
return hr;
}
STDMETHODIMP Skip(ULONG celt)
{
m_Index += celt;
return S_OK;
}
STDMETHODIMP Reset()
{
m_Index = 0;
return S_OK;
}
STDMETHODIMP Clone(IEnumIDList **ppenum)
{
return E_NOTIMPL;
}
public:
DECLARE_NOT_AGGREGATABLE(CEnumFonts)
DECLARE_PROTECT_FINAL_CONSTRUCT()
BEGIN_COM_MAP(CEnumFonts)
COM_INTERFACE_ENTRY_IID(IID_IEnumIDList, IEnumIDList)
END_COM_MAP()
};
HRESULT _CEnumFonts_CreateInstance(CFontExt* zip, DWORD flags, REFIID riid, LPVOID * ppvOut)
{
return ShellObjectCreatorInit<CEnumFonts>(zip, flags, riid, ppvOut);
}