109 lines
2.8 KiB
C++
109 lines
2.8 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 "Resource.h"
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#include <windows.h>
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#include <shlobj.h>
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#include <string>
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extern std::wstring gDllPath;
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extern GUID CLSID_TestShellEx;
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class IconExtension final : public IPersistFile,
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public IExtractIconA,
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public IExtractIconW {
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mozilla::Atomic<uint32_t> mRefCnt;
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~IconExtension() = default;
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public:
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IconExtension() : 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_IPersist) {
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RefPtr ref(static_cast<IPersist*>(this));
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ref.forget(aResult);
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return S_OK;
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} else if (aRefIID == IID_IPersistFile) {
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RefPtr ref(static_cast<IPersistFile*>(this));
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ref.forget(aResult);
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return S_OK;
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} else if (aRefIID == IID_IExtractIconA) {
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RefPtr ref(static_cast<IExtractIconA*>(this));
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ref.forget(aResult);
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return S_OK;
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} else if (aRefIID == IID_IExtractIconW) {
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RefPtr ref(static_cast<IExtractIconW*>(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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// IPersist
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STDMETHODIMP GetClassID(CLSID* aClassID) {
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*aClassID = CLSID_TestShellEx;
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return S_OK;
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}
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// IPersistFile
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STDMETHODIMP GetCurFile(LPOLESTR*) { return E_NOTIMPL; }
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STDMETHODIMP IsDirty() { return S_FALSE; }
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STDMETHODIMP Load(LPCOLESTR, DWORD) { return S_OK; }
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STDMETHODIMP Save(LPCOLESTR, BOOL) { return E_NOTIMPL; }
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STDMETHODIMP SaveCompleted(LPCOLESTR) { return E_NOTIMPL; }
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// IExtractIconA
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STDMETHODIMP Extract(PCSTR, UINT, HICON*, HICON*, UINT) { return E_NOTIMPL; }
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STDMETHODIMP GetIconLocation(UINT, PSTR, UINT, int*, UINT*) {
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return E_NOTIMPL;
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}
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// IExtractIconW
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STDMETHODIMP Extract(PCWSTR, UINT, HICON*, HICON*, UINT) { return S_FALSE; }
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STDMETHODIMP GetIconLocation(UINT, PWSTR aIconFile, UINT aCchMax, int* aIndex,
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UINT* aOutFlags) {
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if (aCchMax <= gDllPath.size()) {
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return E_NOT_SUFFICIENT_BUFFER;
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}
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gDllPath.copy(aIconFile, gDllPath.size());
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aIconFile[gDllPath.size()] = 0;
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*aOutFlags = GIL_DONTCACHE;
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*aIndex = -IDI_ICON1;
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return S_OK;
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}
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};
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already_AddRefed<IExtractIconW> CreateIconExtension() {
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return mozilla::MakeAndAddRef<IconExtension>();
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}
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