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Cleanup of the accessibility COM objects (#53)

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Fixed issue related to the cleanup of the accessibility COM objects that
may cause Explorer to crash.

Submitted by Ivo Beltchev.

Fixes #53
This commit is contained in:
ge0rdi
2018-07-28 20:20:44 +02:00
committed by ge0rdi
parent 3df484dc7c
commit dc0266c88e
2 changed files with 48 additions and 5 deletions
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41
ClassicStartSrc/ClassicStartMenu/ClassicStartMenuDLL/MenuContainer.cpp
View File

@@ -4426,13 +4426,28 @@ LRESULT CMenuContainer::OnCreate( UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL&
if (m_Options&CONTAINER_SEARCH)
s_SearchMenu=m_hWnd;
s_HotPos=GetMessagePos();
m_pAccessible=NULL;
if (GetSettingBool(L"EnableAccessibility"))
{
m_pAccessible=new CMenuAccessible(this);
if (SUCCEEDED(m_pAccessibleContext.CoCreateInstance(CLSID_ContextSwitcher)))
{
CreateAccessibleData createData={this};
ComCallData callData={};
callData.pUserDefined=&createData;
if (SUCCEEDED(m_pAccessibleContext->ContextCallback(CreateAccessible,&callData,IID_IAccessible,4,NULL)))
{
if (FAILED(CoGetInterfaceAndReleaseStream(createData.pStream,IID_IAccessible,(void**)&m_pAccessible)))
{
m_pAccessibleContext=NULL;
}
}
else
{
m_pAccessibleContext=NULL;
}
}
NotifyWinEvent(EVENT_SYSTEM_MENUPOPUPSTART,m_hWnd,OBJID_CLIENT,CHILDID_SELF);
}
else
m_pAccessible=NULL;
m_pDropTargetProxy=new CDropTargetProxy(this);
RegisterDragDrop(m_hWnd,m_pDropTargetProxy);
if (!m_bSubMenu && s_pFrameworkInputPane)
@@ -4441,6 +4456,23 @@ LRESULT CMenuContainer::OnCreate( UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL&
return 0;
}
HRESULT __stdcall CMenuContainer::CreateAccessible( ComCallData *pData )
{
CreateAccessibleData *pCreateData=(CreateAccessibleData*)pData->pUserDefined;
CComPtr<CMenuAccessible> pAccessible=new CMenuAccessible(pCreateData->pMenu);
HRESULT hr=CoMarshalInterThreadInterfaceInStream(IID_IAccessible,pAccessible,&pCreateData->pStream);
if (FAILED(hr))
{
pAccessible->Reset();
}
return hr;
}
HRESULT __stdcall CMenuContainer::ReleaseAccessible( ComCallData *pData )
{
return CoDisconnectContext(INFINITE);
}
bool CMenuContainer::GetItemRect( int index, RECT &rc )
{
if (index>=0 && index<(int)m_Items.size())
@@ -6111,7 +6143,8 @@ LRESULT CMenuContainer::OnDestroy( UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL
if (m_pAccessible)
{
NotifyWinEvent(EVENT_SYSTEM_MENUPOPUPEND,m_hWnd,OBJID_CLIENT,CHILDID_SELF);
m_pAccessible->Reset();
m_pAccessibleContext->ContextCallback(ReleaseAccessible,NULL,IID_IAccessible,4,NULL);
m_pAccessibleContext=NULL;
m_pAccessible=NULL;
}
if (m_pDropTargetHelper && m_pDragObject)

12
ClassicStartSrc/ClassicStartMenu/ClassicStartMenuDLL/MenuContainer.h
View File

@@ -12,6 +12,7 @@
#include "TouchHelper.h"
#include <vector>
#include <map>
#include <ctxtcall.h>
//#define PREVENT_CLOSING // define this to prevent the menu from closing when it is deactivated (useful for debugging)
//#define REPEAT_ITEMS 10 // define this to repeat each menu item (useful to simulate large menus)
@@ -628,7 +629,8 @@ private:
CAbsolutePidl m_Path2[2];
CComPtr<IShellItem> m_pDropFolder[2]; // the primary folder (used only as a drop target)
CComPtr<IShellView> m_pShellView; // keep the view alive because some buggy namespace extensions clean up if there is no view
CComPtr<CMenuAccessible> m_pAccessible;
CComPtr<IContextCallback> m_pAccessibleContext;
CComPtr<IAccessible> m_pAccessible;
CComPtr<CDropTargetProxy> m_pDropTargetProxy;
DWORD m_InputCookie;
std::vector<int> m_ColumnOffsets;
@@ -983,6 +985,14 @@ private:
};
static void CloseSubMenus( int flags, CMenuContainer *pAfter );
struct CreateAccessibleData
{
CMenuContainer *pMenu;
IStream *pStream;
};
static HRESULT __stdcall CreateAccessible( ComCallData *pData );
static HRESULT __stdcall ReleaseAccessible( ComCallData *pData );
// To control the placement of the start menu, send ClassicStartMenu.StartMenuMsg message right after the start menu is created but before it is displayed
// The lParam must point to StartMenuParams
// monitorRect - the entire area available to the start menu (sub-menus will use it). It is usually the monitor area but can be less if the Desktop app is docked in Win8