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[BROWSEUI] Fix infinite recursion in autocomplete control

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import wine commits 9c2217 and 644358, slightly tweaked to fit our code
This commit is contained in:
Mark Jansen 2020-01-26 23:40:04 +01:00
parent 43556bfff2
commit 5b3e84f2ef
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GPG key ID: B39240EE84BEAE8B
1 changed files with 24 additions and 4 deletions
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24
dll/win32/browseui/CAutoComplete.cpp
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@ -65,8 +65,11 @@ CAutoComplete::~CAutoComplete()
TRACE(" destroying IAutoComplete(%p)\n", this);
HeapFree(GetProcessHeap(), 0, quickComplete);
HeapFree(GetProcessHeap(), 0, txtbackup);
RemovePropW(hwndEdit, autocomplete_propertyW);
if (wpOrigEditProc)
{
SetWindowLongPtrW(hwndEdit, GWLP_WNDPROC, (LONG_PTR)wpOrigEditProc);
RemovePropW(hwndEdit, autocomplete_propertyW);
}
if (hwndListBox)
DestroyWindow(hwndListBox);
}
@ -148,10 +151,27 @@ HRESULT WINAPI CAutoComplete::Init(HWND hwndEdit, IUnknown *punkACL, LPCOLESTR p
this->hwndEdit = hwndEdit;
this->initialized = TRUE;
this->wpOrigEditProc = (WNDPROC)SetWindowLongPtrW(hwndEdit, GWLP_WNDPROC, (LONG_PTR) ACEditSubclassProc);
/* Keep at least one reference to the object until the edit window is destroyed. */
this->AddRef();
/* If another AutoComplete object was previously assigned to this edit control,
release it but keep the same callback on the control, to avoid an infinite
recursive loop in ACEditSubclassProc while the property is set to this object */
CAutoComplete *prev = static_cast<CAutoComplete *>(GetPropW(hwndEdit, autocomplete_propertyW));
if (prev && prev->initialized)
{
this->wpOrigEditProc = prev->wpOrigEditProc;
SetPropW(hwndEdit, autocomplete_propertyW, this);
prev->wpOrigEditProc = NULL;
prev->Release();
}
else
{
SetPropW( this->hwndEdit, autocomplete_propertyW, (HANDLE)this );
this->wpOrigEditProc = (WNDPROC)SetWindowLongPtrW(hwndEdit, GWLP_WNDPROC, (LONG_PTR)ACEditSubclassProc);
}
if (options & ACO_AUTOSUGGEST)
{