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/*
Miranda IM: the free IM client for Microsoft* Windows*
Copyright 2000-2006 Miranda ICQ/IM project,
all portions of this codebase are copyrighted to the people
listed in contributors.txt.
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.
*/
#include "commonheaders.h"
#include "clc.h"
#include <shlobj.h>
static IDropTargetVtbl dropTargetVtbl;
struct CDropTarget
{
IDropTargetVtbl *lpVtbl;
unsigned refCount;
IDropTargetHelper *pDropTargetHelper;
}
static dropTarget;
static HWND hwndCurrentDrag = NULL;
static int originalSelection;
static STDMETHODIMP_(ULONG) CDropTarget_QueryInterface(struct CDropTarget *lpThis, REFIID riid, LPVOID * ppvObj)
{
if (IsEqualIID(riid, &IID_IDropTarget)) {
*ppvObj = lpThis;
lpThis->lpVtbl->AddRef((IDropTarget *) lpThis);
return S_OK;
}
*ppvObj = NULL;
return E_NOINTERFACE;
}
static STDMETHODIMP_(ULONG) CDropTarget_AddRef(struct CDropTarget *lpThis)
{
return ++lpThis->refCount;
}
static STDMETHODIMP_(ULONG) CDropTarget_Release(struct CDropTarget *lpThis)
{
if (lpThis->refCount == 1) {
if (lpThis->pDropTargetHelper)
lpThis->pDropTargetHelper->lpVtbl->Release(lpThis->pDropTargetHelper);
}
return --lpThis->refCount;
}
static HANDLE HContactFromPoint(HWND hwnd, struct ClcData *dat, int x, int y, int *hitLine)
{
int hit;
struct ClcContact *contact;
DWORD hitFlags;
char *szProto;
DWORD protoCaps;
hit = cli.pfnHitTest(hwnd, dat, x, y, &contact, NULL, &hitFlags);
if (hit == -1 || !(hitFlags & (CLCHT_ONITEMLABEL | CLCHT_ONITEMICON)) || contact->type != CLCIT_CONTACT)
return NULL;
szProto = (char *) CallService(MS_PROTO_GETCONTACTBASEPROTO, (WPARAM) contact->hContact, 0);
if (szProto == NULL)
return NULL;
protoCaps = CallProtoService(szProto, PS_GETCAPS, PFLAGNUM_1, 0);
if (!(protoCaps & PF1_FILESEND))
return NULL;
if (ID_STATUS_OFFLINE == DBGetContactSettingWord(contact->hContact, szProto, "Status", ID_STATUS_OFFLINE))
return NULL;
if (hitLine)
*hitLine = hit;
return contact->hContact;
}
static STDMETHODIMP_(HRESULT) CDropTarget_DragOver(struct CDropTarget *lpThis, DWORD fKeyState, POINTL pt, DWORD * pdwEffect)
{
POINT shortPt;
struct ClcData *dat;
RECT clRect;
int hit;
HANDLE hContact;
if (lpThis->pDropTargetHelper && hwndCurrentDrag)
lpThis->pDropTargetHelper->lpVtbl->DragOver(lpThis->pDropTargetHelper, (POINT *) & pt, *pdwEffect);
*pdwEffect = 0;
if (hwndCurrentDrag == NULL) {
*pdwEffect = DROPEFFECT_NONE;
return S_OK;
}
CallService(MS_CLIST_PAUSEAUTOHIDE, 0, 0);
dat = (struct ClcData *) GetWindowLong(hwndCurrentDrag, 0);
shortPt.x = pt.x;
shortPt.y = pt.y;
ScreenToClient(hwndCurrentDrag, &shortPt);
GetClientRect(hwndCurrentDrag, &clRect);
if (shortPt.y < dat->dragAutoScrollHeight || shortPt.y >= clRect.bottom - dat->dragAutoScrollHeight) {
*pdwEffect |= DROPEFFECT_SCROLL;
cli.pfnScrollTo(hwndCurrentDrag, dat, dat->yScroll + (shortPt.y < dat->dragAutoScrollHeight ? -1 : 1) * dat->rowHeight * 2, 0);
}
hContact = HContactFromPoint(hwndCurrentDrag, dat, shortPt.x, shortPt.y, &hit);
if (hContact == NULL) {
hit = -1;
*pdwEffect |= DROPEFFECT_NONE;
}
else
*pdwEffect |= DROPEFFECT_COPY;
if (dat->selection != hit) {
dat->selection = hit;
cli.pfnInvalidateRect(hwndCurrentDrag, NULL, FALSE);
lpThis->pDropTargetHelper->lpVtbl->Show(lpThis->pDropTargetHelper, FALSE);
UpdateWindow(hwndCurrentDrag);
lpThis->pDropTargetHelper->lpVtbl->Show(lpThis->pDropTargetHelper, TRUE);
}
return S_OK;
}
static STDMETHODIMP_(HRESULT) CDropTarget_DragEnter(struct CDropTarget *lpThis, IDataObject * pData, DWORD fKeyState, POINTL pt, DWORD * pdwEffect)
{
HWND hwnd;
TCHAR szWindowClass[64];
POINT shortPt;
shortPt.x = pt.x;
shortPt.y = pt.y;
hwnd = WindowFromPoint(shortPt);
GetClassName(hwnd, szWindowClass, SIZEOF(szWindowClass));
if (!lstrcmp(szWindowClass, CLISTCONTROL_CLASS)) {
struct ClcData *dat;
hwndCurrentDrag = hwnd;
dat = (struct ClcData *) GetWindowLong(hwndCurrentDrag, 0);
originalSelection = dat->selection;
dat->showSelAlways = 1;
}
if (lpThis->pDropTargetHelper && hwndCurrentDrag)
lpThis->pDropTargetHelper->lpVtbl->DragEnter(lpThis->pDropTargetHelper, hwndCurrentDrag, pData, (POINT *) & pt, *pdwEffect);
return CDropTarget_DragOver(lpThis, fKeyState, pt, pdwEffect);
}
static STDMETHODIMP_(HRESULT) CDropTarget_DragLeave(struct CDropTarget *lpThis)
{
if (hwndCurrentDrag) {
struct ClcData *dat;
if (lpThis->pDropTargetHelper)
lpThis->pDropTargetHelper->lpVtbl->DragLeave(lpThis->pDropTargetHelper);
dat = (struct ClcData *) GetWindowLong(hwndCurrentDrag, 0);
dat->showSelAlways = 0;
dat->selection = originalSelection;
cli.pfnInvalidateRect(hwndCurrentDrag, NULL, FALSE);
}
hwndCurrentDrag = NULL;
return S_OK;
}
static void AddToFileList(char ***pppFiles, int *totalCount, const char *szFilename)
{
*pppFiles = (char **) mir_realloc(*pppFiles, (++*totalCount + 1) * sizeof(char *));
(*pppFiles)[*totalCount] = NULL;
(*pppFiles)[*totalCount - 1] = mir_strdup(szFilename);
if (GetFileAttributesA(szFilename) & FILE_ATTRIBUTE_DIRECTORY) {
WIN32_FIND_DATAA fd;
HANDLE hFind;
char szPath[MAX_PATH];
lstrcpyA(szPath, szFilename);
lstrcatA(szPath, "\\*");
if (hFind = FindFirstFileA(szPath, &fd)) {
do {
if (!lstrcmpA(fd.cFileName, ".") || !lstrcmpA(fd.cFileName, ".."))
continue;
lstrcpyA(szPath, szFilename);
lstrcatA(szPath, "\\");
lstrcatA(szPath, fd.cFileName);
AddToFileList(pppFiles, totalCount, szPath);
} while (FindNextFileA(hFind, &fd));
FindClose(hFind);
}
}
}
static STDMETHODIMP_(HRESULT) CDropTarget_Drop(struct CDropTarget *lpThis, IDataObject * pData, DWORD fKeyState, POINTL pt, DWORD * pdwEffect)
{
FORMATETC fe = { CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
STGMEDIUM stg;
HDROP hDrop;
POINT shortPt;
struct ClcData *dat;
HANDLE hContact;
if (lpThis->pDropTargetHelper && hwndCurrentDrag)
lpThis->pDropTargetHelper->lpVtbl->Drop(lpThis->pDropTargetHelper, pData, (POINT *) & pt, *pdwEffect);
*pdwEffect = DROPEFFECT_NONE;
if (hwndCurrentDrag == NULL || S_OK != pData->lpVtbl->GetData(pData, &fe, &stg))
return S_OK;
hDrop = (HDROP) stg.hGlobal;
dat = (struct ClcData *) GetWindowLong(hwndCurrentDrag, 0);
shortPt.x = pt.x;
shortPt.y = pt.y;
ScreenToClient(hwndCurrentDrag, &shortPt);
hContact = HContactFromPoint(hwndCurrentDrag, dat, shortPt.x, shortPt.y, NULL);
if (hContact != NULL) {
char **ppFiles = NULL;
char szFilename[MAX_PATH];
int fileCount, totalCount = 0, i;
fileCount = DragQueryFile(hDrop, -1, NULL, 0);
ppFiles = NULL;
for (i = 0; i < fileCount; i++) {
DragQueryFileA(hDrop, i, szFilename, SIZEOF(szFilename));
AddToFileList(&ppFiles, &totalCount, szFilename);
}
if (!CallService(MS_CLIST_CONTACTFILESDROPPED, (WPARAM) hContact, (LPARAM) ppFiles))
*pdwEffect = DROPEFFECT_COPY;
for (i = 0; ppFiles[i]; i++)
mir_free(ppFiles[i]);
mir_free(ppFiles);
}
if (stg.pUnkForRelease)
stg.pUnkForRelease->lpVtbl->Release(stg.pUnkForRelease);
else
GlobalFree(stg.hGlobal);
CDropTarget_DragLeave(lpThis);
return S_OK;
}
static VOID CALLBACK CreateDropTargetHelperTimerProc(HWND hwnd, UINT uMsg, UINT idEvent, DWORD dwTime)
{
/* macro defines needed CLSID and IID declarations since
they have to be referenced */
#ifndef CLSID_DragDropHelper
#define MDEF_CLSID(name, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8) \
const CLSID name \
= { l, w1, w2, { b1, b2, b3, b4, b5, b6, b7, b8 } }
MDEF_CLSID(IID_IDropTargetHelper, 0x4657278b, 0x411b, 0x11d2, 0x83, 0x9a, 0x0, 0xc0, 0x4f, 0xd9, 0x18, 0xd0);
MDEF_CLSID(CLSID_DragDropHelper, 0x4657278a, 0x411b, 0x11d2, 0x83, 0x9a, 0x0, 0xc0, 0x4f, 0xd9, 0x18, 0xd0);
#endif
KillTimer(hwnd, idEvent);
//This is a ludicrously slow function (~200ms) so we delay load it a bit.
if (S_OK != CoCreateInstance(&CLSID_DragDropHelper, NULL, CLSCTX_INPROC_SERVER, &IID_IDropTargetHelper, &dropTarget.pDropTargetHelper))
dropTarget.pDropTargetHelper = NULL;
}
void InitFileDropping(void)
{
OleInitialize(NULL);
dropTarget.lpVtbl = &dropTargetVtbl;
dropTarget.lpVtbl->AddRef = (ULONG(__stdcall *) (IDropTarget *)) CDropTarget_AddRef;
dropTarget.lpVtbl->Release = (ULONG(__stdcall *) (IDropTarget *)) CDropTarget_Release;
dropTarget.lpVtbl->QueryInterface = (ULONG(__stdcall *) (IDropTarget *, REFIID, PVOID *)) CDropTarget_QueryInterface;
dropTarget.lpVtbl->DragEnter = (HRESULT(__stdcall *) (IDropTarget *, IDataObject *, DWORD, POINTL, PDWORD)) CDropTarget_DragEnter;
dropTarget.lpVtbl->DragOver = (HRESULT(__stdcall *) (IDropTarget *, DWORD, POINTL, PDWORD)) CDropTarget_DragOver;
dropTarget.lpVtbl->DragLeave = (HRESULT(__stdcall *) (IDropTarget *)) CDropTarget_DragLeave;
dropTarget.lpVtbl->Drop = (HRESULT(__stdcall *) (IDropTarget *, IDataObject *, DWORD, POINTL, PDWORD)) CDropTarget_Drop;
dropTarget.refCount = 0;
dropTarget.pDropTargetHelper = NULL;
SetTimer(NULL, 1, 1000, CreateDropTargetHelperTimerProc);
}
void FreeFileDropping(void)
{
OleUninitialize();
}
void fnRegisterFileDropping(HWND hwnd)
{
RegisterDragDrop(hwnd, (IDropTarget *) & dropTarget);
}
void fnUnregisterFileDropping(HWND hwnd)
{
RevokeDragDrop(hwnd);
}
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