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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"
#include "ImageDataObjectHlp.h"
#include "dataobject.h"
// cache up to 1000 objects
#define MAX_CACHE_SIZE 2000
struct EMFCACHE
{
HWND hwnd;
HICON hIcon;
CEMFObject *pEmfObj = 0;
IStorage *pStorage = 0;
IOleObject *pOleObject = 0;
~EMFCACHE()
{
if (pEmfObj)
pEmfObj->Release();
if (pStorage)
pStorage->Release();
if (pOleObject)
pOleObject->Release();
}
};
mir_cs csEmfCache;
static OBJLIST<EMFCACHE> g_arCache(50);
void UnloadEmfCache()
{
g_arCache.destroy();
}
void CleanupEmfCache(HWND hwnd)
{
for (auto &it : g_arCache.rev_iter())
if (it->hwnd == hwnd)
g_arCache.remove(g_arCache.indexOf(&it));
}
IDataObject* CacheIconToIDataObject(HWND hwnd, HICON hIcon, IOleClientSite *pOleClientSite, IStorage **ppStorage, IOleObject **ppOleObject)
{
static const FORMATETC lc_format[] =
{
{ CF_ENHMETAFILE, nullptr, DVASPECT_CONTENT, -1, TYMED_ENHMF }
};
mir_cslock lck(csEmfCache);
for (auto &it : g_arCache.rev_iter())
if (it->hwnd == hwnd && it->hIcon == hIcon) {
*ppStorage = it->pStorage;
*ppOleObject = it->pOleObject;
return it->pEmfObj;
}
// cache new item
EMFCACHE *newItem = new EMFCACHE();
LPLOCKBYTES lpLockBytes = nullptr;
SCODE sc = CreateILockBytesOnHGlobal(nullptr, TRUE, &lpLockBytes);
if (sc != S_OK) {
delete newItem;
return nullptr;
}
sc = StgCreateDocfileOnILockBytes(lpLockBytes,
STGM_SHARE_EXCLUSIVE | STGM_CREATE | STGM_READWRITE, 0, &newItem->pStorage);
lpLockBytes->Release();
if (sc != S_OK) {
delete newItem;
return nullptr;
}
HDC emfdc = CreateEnhMetaFile(nullptr, nullptr, nullptr, L"icon");
DrawIconEx(emfdc, 0, 0, (HICON)hIcon, 16, 16, 0, nullptr, DI_NORMAL);
newItem->pEmfObj = new CEMFObject(CloseEnhMetaFile(emfdc));
newItem->hIcon = hIcon;
newItem->hwnd = hwnd;
sc = OleCreateStaticFromData(newItem->pEmfObj, IID_IOleObject, OLERENDER_FORMAT,
(LPFORMATETC)lc_format, pOleClientSite, newItem->pStorage, (void **)&newItem->pOleObject);
if (sc != S_OK) {
delete newItem;
return nullptr;
}
OleSetContainedObject(newItem->pOleObject, TRUE);
g_arCache.insert(newItem);
*ppStorage = newItem->pStorage;
*ppOleObject = newItem->pOleObject;
return newItem->pEmfObj;
}
// returns true on success, false on failure
bool InsertBitmap(HWND hwnd, IRichEditOle *pRichEditOle, HICON hIcon)
{
// Get the RichEdit container site
IOleClientSite *pOleClientSite;
pRichEditOle->GetClientSite(&pOleClientSite);
IStorage *pStorage;
IOleObject *pOleObject;
IDataObject *pods = CacheIconToIDataObject(hwnd, hIcon, pOleClientSite, &pStorage, &pOleObject);
if (pods == nullptr) {
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.
// Now Add the object to the RichEdit
REOBJECT reobject = {};
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;
SCODE sc = pOleObject->GetUserClassID(&reobject.clsid);
if (sc != S_OK)
return false;
// Insert the bitmap at the current location in the richedit control
sc = pRichEditOle->InsertObject(&reobject);
return sc == S_OK;
}
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