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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 <windows.h>
#include <shlobj.h>
already_AddRefed<IExtractIconW> CreateIconExtension();
class ClassFactory final : public IClassFactory {
mozilla::Atomic<uint32_t> mRefCnt;
~ClassFactory() = default;
public:
ClassFactory() : mRefCnt(0) {}
// IUnknown
STDMETHODIMP QueryInterface(REFIID aRefIID, void** aResult) {
if (!aResult) {
return E_INVALIDARG;
}
if (aRefIID == IID_IClassFactory) {
RefPtr ref(static_cast<IClassFactory*>(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;
}
// IClassFactory
STDMETHODIMP CreateInstance(IUnknown* aOuter, REFIID aRefIID,
void** aResult) {
if (aOuter) {
return CLASS_E_NOAGGREGATION;
}
RefPtr<IUnknown> instance;
if (IsEqualCLSID(aRefIID, IID_IExtractIconA) ||
IsEqualCLSID(aRefIID, IID_IExtractIconW)) {
instance = CreateIconExtension();
} else {
return E_NOINTERFACE;
}
return instance ? instance->QueryInterface(aRefIID, aResult)
: E_OUTOFMEMORY;
}
STDMETHODIMP LockServer(BOOL) { return S_OK; }
};
already_AddRefed<IClassFactory> CreateFactory() {
return mozilla::MakeAndAddRef<ClassFactory>();
}