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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "mozilla/Atomics.h"
#include "mozilla/RefPtr.h"
#include "Resource.h"
#include <windows.h>
#include <shlobj.h>
#include <string>
extern std::wstring gDllPath;
extern GUID CLSID_TestShellEx;
class IconExtension final : public IPersistFile,
public IExtractIconA,
public IExtractIconW {
mozilla::Atomic<uint32_t> mRefCnt;
~IconExtension() = default;
public:
IconExtension() : mRefCnt(0) {}
// IUnknown
STDMETHODIMP QueryInterface(REFIID aRefIID, void** aResult) {
if (!aResult) {
return E_INVALIDARG;
}
if (aRefIID == IID_IPersist) {
RefPtr ref(static_cast<IPersist*>(this));
ref.forget(aResult);
return S_OK;
} else if (aRefIID == IID_IPersistFile) {
RefPtr ref(static_cast<IPersistFile*>(this));
ref.forget(aResult);
return S_OK;
} else if (aRefIID == IID_IExtractIconA) {
RefPtr ref(static_cast<IExtractIconA*>(this));
ref.forget(aResult);
return S_OK;
} else if (aRefIID == IID_IExtractIconW) {
RefPtr ref(static_cast<IExtractIconW*>(this));
ref.forget(aResult);
return S_OK;
}
return E_NOINTERFACE;
}
STDMETHODIMP_(ULONG) AddRef() { return ++mRefCnt; }
STDMETHODIMP_(ULONG) Release() {
ULONG result = --mRefCnt;
if (!result) {
delete this;
}
return result;
}
// IPersist
STDMETHODIMP GetClassID(CLSID* aClassID) {
*aClassID = CLSID_TestShellEx;
return S_OK;
}
// IPersistFile
STDMETHODIMP GetCurFile(LPOLESTR*) { return E_NOTIMPL; }
STDMETHODIMP IsDirty() { return S_FALSE; }
STDMETHODIMP Load(LPCOLESTR, DWORD) { return S_OK; }
STDMETHODIMP Save(LPCOLESTR, BOOL) { return E_NOTIMPL; }
STDMETHODIMP SaveCompleted(LPCOLESTR) { return E_NOTIMPL; }
// IExtractIconA
STDMETHODIMP Extract(PCSTR, UINT, HICON*, HICON*, UINT) { return E_NOTIMPL; }
STDMETHODIMP GetIconLocation(UINT, PSTR, UINT, int*, UINT*) {
return E_NOTIMPL;
}
// IExtractIconW
STDMETHODIMP Extract(PCWSTR, UINT, HICON*, HICON*, UINT) { return S_FALSE; }
STDMETHODIMP GetIconLocation(UINT, PWSTR aIconFile, UINT aCchMax, int* aIndex,
UINT* aOutFlags) {
if (aCchMax <= gDllPath.size()) {
return E_NOT_SUFFICIENT_BUFFER;
}
gDllPath.copy(aIconFile, gDllPath.size());
aIconFile[gDllPath.size()] = 0;
*aOutFlags = GIL_DONTCACHE;
*aIndex = -IDI_ICON1;
return S_OK;
}
};
already_AddRefed<IExtractIconW> CreateIconExtension() {
return mozilla::MakeAndAddRef<IconExtension>();
}