| 1 | /* $Id: VBoxComEvents.cpp 62468 2016-07-22 18:01:39Z vboxsync $ */
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| 2 | /** @file
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| 3 | *
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| 4 | * COM Events Helper routines.
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| 5 | */
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| 6 |
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| 7 | /*
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| 8 | * Copyright (C) 2010-2016 Oracle Corporation
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| 9 | *
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| 10 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 11 | * available from http://www.virtualbox.org. This file is free software;
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| 12 | * you can redistribute it and/or modify it under the terms of the GNU
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| 13 | * General Public License (GPL) as published by the Free Software
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| 14 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 15 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 16 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 17 | */
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| 18 |
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| 19 | #include "VBoxComEvents.h"
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| 20 | // for IIDs
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| 21 | #include "VirtualBoxImpl.h"
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| 22 |
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| 23 | ComEventsHelper::ComEventsHelper()
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| 24 | {
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| 25 | }
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| 26 |
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| 27 | ComEventsHelper::~ComEventsHelper()
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| 28 | {
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| 29 | }
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| 30 |
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| 31 | HRESULT ComEventsHelper::init(const com::Guid &aGuid)
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| 32 | {
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| 33 | HRESULT hr = 0;
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| 34 | ComPtr<ITypeLib> ptlib;
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| 35 | ComPtr<ITypeInfo> ptinfo;
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| 36 | int i;
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| 37 |
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| 38 |
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| 39 | hr = ::LoadRegTypeLib(LIBID_VirtualBox, kTypeLibraryMajorVersion, kTypeLibraryMinorVersion, LOCALE_SYSTEM_DEFAULT, ptlib.asOutParam());
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| 40 | if (FAILED(hr))
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| 41 | return hr;
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| 42 |
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| 43 | hr = ptlib->GetTypeInfoOfGuid(aGuid.ref(), ptinfo.asOutParam());
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| 44 | if (FAILED(hr))
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| 45 | return hr;
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| 46 |
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| 47 | TYPEATTR *pta;
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| 48 | hr = ptinfo->GetTypeAttr(&pta);
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| 49 | if (FAILED(hr))
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| 50 | return hr;
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| 51 |
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| 52 | int cFuncs = pta->cFuncs;
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| 53 |
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| 54 | for (i = 0; i < cFuncs; i++)
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| 55 | {
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| 56 | FUNCDESC *pfd;
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| 57 | DWORD hContext; // help context
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| 58 | BSTR fName;
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| 59 |
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| 60 | hr = ptinfo->GetFuncDesc(i, &pfd);
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| 61 | if (FAILED(hr))
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| 62 | break;
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| 63 |
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| 64 | hr = ptinfo->GetDocumentation(pfd->memid, &fName, NULL, &hContext, NULL);
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| 65 | if (FAILED(hr))
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| 66 | {
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| 67 | ptinfo->ReleaseFuncDesc(pfd);
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| 68 | break;
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| 69 | }
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| 70 |
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| 71 | /* We only allow firing event callbacks */
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| 72 | if (_wcsnicmp(fName, L"On", 2) == 0)
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| 73 | {
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| 74 | DISPID did;
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| 75 |
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| 76 | hr = ::DispGetIDsOfNames(ptinfo, &fName, 1, &did);
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| 77 | evMap.insert(ComEventsMap::value_type(com::Utf8Str(fName), did));
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| 78 |
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| 79 | }
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| 80 | SysFreeString(fName);
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| 81 |
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| 82 | ptinfo->ReleaseFuncDesc(pfd);
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| 83 | }
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| 84 | ptinfo->ReleaseTypeAttr(pta);
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| 85 |
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| 86 | return hr;
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| 87 | }
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| 88 |
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| 89 | HRESULT ComEventsHelper::lookup(com::Utf8Str &aName, DISPID *did)
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| 90 | {
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| 91 | ComEventsMap::const_iterator it = evMap.find(aName);
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| 92 |
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| 93 | if (it != evMap.end())
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| 94 | {
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| 95 | *did = it->second;
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| 96 | return S_OK;
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| 97 | }
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| 98 | else
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| 99 | {
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| 100 | *did = 0;
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| 101 | return VBOX_E_OBJECT_NOT_FOUND;
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| 102 | }
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| 103 | }
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| 104 |
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| 105 |
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| 106 | HRESULT ComEventsHelper::fire(IDispatch *aObj, ComEventDesc &event, tagVARIANT *result)
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| 107 | {
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| 108 | int argc = event.mArgc;
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| 109 | tagVARIANT *args = event.mArgs;
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| 110 | DISPPARAMS disp = { args, NULL, argc, 0};
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| 111 | DISPID dispid;
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| 112 |
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| 113 | HRESULT hr = lookup(event.mName, &dispid);
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| 114 |
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| 115 | if (FAILED(hr))
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| 116 | return hr;
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| 117 |
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| 118 | hr = aObj->Invoke(dispid, IID_NULL,
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| 119 | LOCALE_USER_DEFAULT,
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| 120 | DISPATCH_METHOD,
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| 121 | &disp, result,
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| 122 | NULL, NULL);
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| 123 |
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| 124 | return hr;
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| 125 | }
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