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#include "stdafx.h"
class CREOleCallback : public IRichEditOleCallback
{
private:
unsigned refCount = 1;
IStorage *pictStg = nullptr;
int nextStgId = 0;
public:
CREOleCallback() {}
STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppvObj) override
{
if (IsEqualIID(riid, IID_IRichEditOleCallback)) {
*ppvObj = this;
AddRef();
return S_OK;
}
*ppvObj = nullptr;
return E_NOINTERFACE;
}
ULONG STDMETHODCALLTYPE AddRef() override
{
if (refCount == 0) {
if (S_OK != StgCreateDocfile(nullptr, STGM_READWRITE | STGM_SHARE_EXCLUSIVE | STGM_CREATE | STGM_DELETEONRELEASE, 0, &this->pictStg))
pictStg = nullptr;
nextStgId = 0;
}
return ++refCount;
}
ULONG STDMETHODCALLTYPE Release() override
{
if (--refCount == 0) {
if (pictStg)
pictStg->Release();
}
return refCount;
}
STDMETHODIMP ContextSensitiveHelp(BOOL) override
{
return S_OK;
}
STDMETHODIMP DeleteObject(LPOLEOBJECT) override
{
return S_OK;
}
STDMETHODIMP GetClipboardData(CHARRANGE *, DWORD, LPDATAOBJECT *) override
{
return E_NOTIMPL;
}
STDMETHODIMP GetContextMenu(uint16_t, LPOLEOBJECT, CHARRANGE *, HMENU *) override
{
return E_INVALIDARG;
}
STDMETHODIMP GetDragDropEffect(BOOL, DWORD, LPDWORD) override
{
return S_OK;
}
STDMETHODIMP GetInPlaceContext(LPOLEINPLACEFRAME *, LPOLEINPLACEUIWINDOW *, LPOLEINPLACEFRAMEINFO) override
{
return E_INVALIDARG;
}
STDMETHODIMP GetNewStorage(LPSTORAGE *lplpstg) override
{
wchar_t sztName[64];
mir_snwprintf(sztName, L"s%u", this->nextStgId);
if (this->pictStg == nullptr)
return STG_E_MEDIUMFULL;
return this->pictStg->CreateStorage(sztName, STGM_READWRITE | STGM_SHARE_EXCLUSIVE | STGM_CREATE, 0, 0, lplpstg);
}
STDMETHODIMP QueryAcceptData(LPDATAOBJECT, CLIPFORMAT *, DWORD, BOOL, HGLOBAL) override
{
return S_OK;
}
STDMETHODIMP QueryInsertObject(LPCLSID, LPSTORAGE, LONG) override
{
return S_OK;
}
STDMETHODIMP ShowContainerUI(BOOL) override
{
return S_OK;
}
};
static CREOleCallback reOleCallback;
void InitRichEdit(ITextServices *ts)
{
LRESULT lResult;
ts->TxSendMessage(EM_SETOLECALLBACK, 0, (LPARAM)&reOleCallback, &lResult);
}
/////////////////////////////////////////////////////////////////////////////////////////
static ATOM winClass = 0;
static LRESULT CALLBACK RichEditProxyWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
ITextServices *ts = (ITextServices *)GetWindowLongPtr(hwnd, GWLP_USERDATA);
if (ts && (msg != WM_DESTROY)) {
LRESULT lResult;
ts->TxSendMessage(msg, wParam, lParam, &lResult);
return lResult;
}
return 1;
}
HWND CreateProxyWindow(ITextServices *ts)
{
if (winClass == 0) {
WNDCLASSEX wcl = {};
wcl.cbSize = sizeof(wcl);
wcl.lpfnWndProc = RichEditProxyWndProc;
wcl.style = CS_GLOBALCLASS;
wcl.hInstance = g_hInst;
wcl.hCursor = LoadCursor(nullptr, IDC_ARROW);
wcl.hbrBackground = (HBRUSH)GetStockObject(LTGRAY_BRUSH);
wcl.lpszClassName = L"NBRichEditProxyWndClass";
winClass = RegisterClassExW(&wcl);
}
HWND hwnd = CreateWindow(L"NBRichEditProxyWndClass", L"", 0, 0, 0, 0, 0, nullptr, nullptr, g_hInst, nullptr);
SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)ts);
return hwnd;
}
void DestroyProxyWindow()
{
if (winClass != 0)
UnregisterClassW(L"NBRichEditProxyWndClass", g_hInst);
}
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