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/*
Miranda SmileyAdd Plugin
Copyright (C) 2004-2005 Rein-Peter de Boer (peacow) and followers
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
//imagedataobject
//code taken partly from public example on the internet, source unknown.
#include "stdafx.h"
struct EMFCACHE
{
HENHMETAFILE hEmf;
HICON hIcon;
EMFCACHE *prev;
EMFCACHE *next;
} *emfCache = nullptr;
int emfCacheSize = 0;
mir_cs csEmfCache;
void UnloadEmfCache()
{
while (emfCache)
{
EMFCACHE *tmp = emfCache->next;
delete emfCache;
emfCache = tmp;
}
}
HENHMETAFILE CacheIconToEmf(HICON hIcon)
{
HENHMETAFILE result = nullptr;
mir_cslock lck(csEmfCache);
for (EMFCACHE *p = emfCache; p; p = p->next)
if (p->hIcon == hIcon)
{
if (p->prev)
{
p->prev->next = p->next;
if (p->next) p->next->prev = p->prev;
p->prev = nullptr;
emfCache->prev = p;
p->next = emfCache;
emfCache = p;
result = CopyEnhMetaFile(emfCache->hEmf, nullptr);
break;
}
}
// cache new item
if (!result)
{
EMFCACHE *newItem = new EMFCACHE;
newItem->prev = nullptr;
newItem->next = emfCache;
if (emfCache) emfCache->prev = newItem;
emfCache = newItem;
emfCacheSize++;
HDC emfdc = CreateEnhMetaFile(nullptr, nullptr, nullptr, L"icon");
DrawIconEx(emfdc, 0, 0, (HICON)hIcon, 16, 16, 0, nullptr, DI_NORMAL);
emfCache->hIcon = hIcon;
emfCache->hEmf = CloseEnhMetaFile(emfdc);
result = CopyEnhMetaFile(emfCache->hEmf, nullptr);
}
// tail cutoff
if (emfCacheSize > 20)
{
int n = 0;
EMFCACHE *p;
for (p = emfCache; p; p = p->next)
if (++n > 20)
break;
while (p->next)
{
EMFCACHE *tmp = p->next;
p->next = p->next->next;
delete tmp;
}
if (p->next) p->next->prev = p;
emfCacheSize = 20;
}
return result;
}
HRESULT CreateDataObject(const FORMATETC *fmtetc, const STGMEDIUM *stgmed, UINT count, IDataObject **ppDataObject);
// returns true on success, false on failure
//bool InsertBitmap(IRichEditOle* pRichEditOle, HBITMAP hBitmap, HGLOBAL hGlobal)
bool InsertBitmap(IRichEditOle* pRichEditOle, HENHMETAFILE hEmf)
{
SCODE sc;
// Get the image data object
//
static const FORMATETC lc_format[] =
{
{ CF_ENHMETAFILE, nullptr, DVASPECT_CONTENT, -1, TYMED_ENHMF }//,
// { CF_BITMAP, 0, DVASPECT_CONTENT, -1, TYMED_GDI },
// { CF_TEXT, 0, DVASPECT_CONTENT, -1, TYMED_HGLOBAL }
};
STGMEDIUM lc_stgmed[] =
{
{ TYMED_ENHMF, { (HBITMAP)hEmf }, nullptr }//,
// { TYMED_GDI, { hBitmap }, 0 },
// { TYMED_HGLOBAL, { (HBITMAP)hGlobal }, 0 }
};
IDataObject *pods;
CreateDataObject(lc_format, lc_stgmed, 1, &pods);
// Get the RichEdit container site
//
IOleClientSite *pOleClientSite;
pRichEditOle->GetClientSite(&pOleClientSite);
// Initialize a Storage Object
//
LPLOCKBYTES lpLockBytes = nullptr;
sc = CreateILockBytesOnHGlobal(nullptr, TRUE, &lpLockBytes);
if (sc != S_OK)
{
pOleClientSite->Release();
return false;
}
IStorage *pStorage;
sc = StgCreateDocfileOnILockBytes(lpLockBytes,
STGM_SHARE_EXCLUSIVE | STGM_CREATE | STGM_READWRITE, 0, &pStorage);
if (sc != S_OK)
{
lpLockBytes->Release();
pOleClientSite->Release();
pods->Release();
return false;
}
// The final ole object which will be inserted in the richedit control
//
IOleObject *pOleObject;
sc = OleCreateStaticFromData(pods, IID_IOleObject, OLERENDER_FORMAT,
(LPFORMATETC)lc_format, pOleClientSite, pStorage, (void **)&pOleObject);
if (sc != S_OK)
{
pStorage->Release();
lpLockBytes->Release();
pOleClientSite->Release();
return false;
}
// all items are "contained" -- this makes our reference to this object
// weak -- which is needed for links to embedding silent update.
OleSetContainedObject(pOleObject, TRUE);
// Now Add the object to the RichEdit
//
REOBJECT reobject = { 0 };
reobject.cbStruct = sizeof(REOBJECT);
reobject.cp = REO_CP_SELECTION;
reobject.dvaspect = DVASPECT_CONTENT;
reobject.poleobj = pOleObject;
reobject.polesite = pOleClientSite;
reobject.pstg = pStorage;
reobject.dwFlags = REO_BELOWBASELINE;
sc = pOleObject->GetUserClassID(&reobject.clsid);
if (sc != S_OK)
{
pOleObject->Release();
pStorage->Release();
lpLockBytes->Release();
pOleClientSite->Release();
return false;
}
// Insert the bitmap at the current location in the richedit control
//
sc = pRichEditOle->InsertObject(&reobject);
// Release all unnecessary interfaces
//
pOleObject->Release();
pStorage->Release();
lpLockBytes->Release();
pOleClientSite->Release();
pods->Release();
return sc == S_OK;
}
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