74 lines
1.8 KiB
C++
74 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/Atomics.h"
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#include "mozilla/RefPtr.h"
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#include <windows.h>
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#include <shlobj.h>
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already_AddRefed<IExtractIconW> CreateIconExtension();
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class ClassFactory final : public IClassFactory {
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mozilla::Atomic<uint32_t> mRefCnt;
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~ClassFactory() = default;
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public:
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ClassFactory() : mRefCnt(0) {}
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// IUnknown
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STDMETHODIMP QueryInterface(REFIID aRefIID, void** aResult) {
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if (!aResult) {
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return E_INVALIDARG;
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}
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if (aRefIID == IID_IClassFactory) {
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RefPtr ref(static_cast<IClassFactory*>(this));
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ref.forget(aResult);
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return S_OK;
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}
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return E_NOINTERFACE;
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}
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STDMETHODIMP_(ULONG) AddRef() { return ++mRefCnt; }
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STDMETHODIMP_(ULONG) Release() {
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ULONG result = --mRefCnt;
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if (!result) {
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delete this;
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}
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return result;
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}
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// IClassFactory
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STDMETHODIMP CreateInstance(IUnknown* aOuter, REFIID aRefIID,
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void** aResult) {
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if (aOuter) {
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return CLASS_E_NOAGGREGATION;
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}
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RefPtr<IUnknown> instance;
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if (IsEqualCLSID(aRefIID, IID_IExtractIconA) ||
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IsEqualCLSID(aRefIID, IID_IExtractIconW)) {
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instance = CreateIconExtension();
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} else {
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return E_NOINTERFACE;
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}
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return instance ? instance->QueryInterface(aRefIID, aResult)
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: E_OUTOFMEMORY;
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}
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STDMETHODIMP LockServer(BOOL) { return S_OK; }
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};
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already_AddRefed<IClassFactory> CreateFactory() {
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return mozilla::MakeAndAddRef<ClassFactory>();
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}
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