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/*
'File Association Manager'-Plugin for Miranda IM
Copyright (C) 2005-2007 H. Herkenrath
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 (AssocMgr-License.txt); if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "common.h"
/* Conversation */
extern HINSTANCE hInst;
static HWND hwndDdeMsg;
/* Misc */
static HANDLE hHookModulesLoaded,hHookPreShutdown;
/************************* Open Handler ***************************/
// pszFilePath needs to be allocated using mir_alloc()
static void __stdcall FileActionAsync(void *param)
{
TCHAR *pszFilePath = (TCHAR*)param;
/* invoke main handler */
switch(InvokeFileHandler(pszFilePath)) { /* pszFilePath is always a long path name */
case 0: /* success */ break;
case CALLSERVICE_NOTFOUND:
ShowInfoMessage(NIIF_ERROR,Translate("Miranda NG could not open file"),Translate("Miranda NG was not able to open \"%S\".\n\nThere is no registered handler for this file type."),pszFilePath);
break;
default:
ShowInfoMessage(NIIF_ERROR,Translate("Miranda NG could not open file"),Translate("Miranda NG was not able to open \"%S\".\n\nThe file could not be processed."),pszFilePath);
}
mir_free(pszFilePath); /* async param */
}
// pszUrl needs to be allocated using mir_alloc()
static void __stdcall UrlActionAsync(void *param)
{
TCHAR *pszUrl = (TCHAR*)param;
/* invoke main handler */
switch(InvokeUrlHandler(pszUrl)) {
case 0: /* success */ break;
case CALLSERVICE_NOTFOUND:
ShowInfoMessage(NIIF_ERROR,Translate("Miranda NG could not open URL"),Translate("Miranda NG was not able to open \"%S\".\n\nThere is no registered handler for this URL type."),pszUrl);
break;
default:
ShowInfoMessage(NIIF_ERROR,Translate("Miranda NG could not open URL"),Translate("Miranda NG was not able to open \"%S\".\n\nThe given URL is invalid and cannot be parsed."),pszUrl);
}
mir_free(pszUrl); /* async param */
}
/************************* Conversation ***************************/
#define DDEMESSAGETIMEOUT 30000
#define WNDCLASS_DDEMSGWINDOW _T("MirandaDdeMsgWindow")
// returned pointer points into a substring of ppszString
// returns an empty string if the string does not have enough arguments
static TCHAR* GetExecuteParam(TCHAR **ppszString)
{
TCHAR *pszParam,*p;
BOOL fQuoted;
fQuoted=(**ppszString==_T('"'));
pszParam=*ppszString;
if(fQuoted) pszParam++;
p=_tcschr(pszParam,(TCHAR)(fQuoted?_T('"'):_T(',')));
if(p!=NULL) {
*(p++)=0;
if(fQuoted && *p==_T(',')) p++;
} else p=&pszParam[lstrlen(pszParam)];
*ppszString=p;
return pszParam;
}
static LRESULT CALLBACK DdeMessageWindow(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam)
{
switch(msg) {
case WM_DDE_INITIATE:
{
ATOM hSzApp=LOWORD(lParam); /* no UnpackDDElParam() here */
ATOM hSzTopic=HIWORD(lParam);
if ((hSzApp==GlobalFindAtom(DDEAPP) && hSzTopic==GlobalFindAtom(DDETOPIC)) || !hSzApp) {
hSzApp=GlobalAddAtom(DDEAPP);
hSzTopic=GlobalAddAtom(DDETOPIC);
if(hSzApp && hSzTopic)
/* PackDDElParam() only for posted msgs */
SendMessage((HWND)wParam,WM_DDE_ACK,(WPARAM)hwnd,MAKELPARAM(hSzApp,hSzTopic));
if(hSzApp) GlobalDeleteAtom(hSzApp);
if(hSzTopic) GlobalDeleteAtom(hSzTopic);
}
return 0;
}
case WM_DDE_EXECUTE: /* posted message */
{
HGLOBAL hCommand;
TCHAR *pszCommand;
DDEACK ack;
ZeroMemory(&ack,sizeof(ack));
if(UnpackDDElParam(msg,lParam,NULL,(PUINT_PTR)&hCommand)) {
/* ANSI execute command can't happen for shell */
if(IsWindowUnicode((HWND)wParam)) {
pszCommand = (TCHAR*)GlobalLock(hCommand);
if(pszCommand!=NULL) {
TCHAR *pszAction,*pszArg;
pszAction=GetExecuteParam(&pszCommand);
pszArg=mir_tstrdup(GetExecuteParam(&pszCommand));
if(pszArg!=NULL) {
/* we are inside miranda here, we make it async so the shell does
* not timeout regardless what the plugins try to do. */
if (!lstrcmpi(pszAction,_T("file")))
CallFunctionAsync(FileActionAsync,pszArg);
else if (!lstrcmpi(pszAction,_T("url")))
CallFunctionAsync(UrlActionAsync,pszArg);
}
GlobalUnlock(hCommand);
}
}
lParam=ReuseDDElParam(lParam,msg,WM_DDE_ACK,*(PUINT)&ack,(UINT)hCommand);
if (!PostMessage((HWND)wParam,WM_DDE_ACK,(WPARAM)hwnd,lParam)) {
GlobalFree(hCommand);
FreeDDElParam(WM_DDE_ACK,lParam);
}
}
return 0;
}
case WM_DDE_TERMINATE:
PostMessage((HWND)wParam,msg,(WPARAM)hwnd,0); /* ack reply */
return 0;
case WM_DDE_REQUEST:
case WM_DDE_ADVISE:
case WM_DDE_UNADVISE:
case WM_DDE_POKE:
/* fail safely for those to avoid memory leak in lParam */
{
ATOM hSzItem;
DDEACK ack;
ZeroMemory(&ack,sizeof(ack));
if(UnpackDDElParam(msg,lParam,NULL,(PUINT_PTR)&hSzItem)) {
lParam=ReuseDDElParam(lParam,msg,WM_DDE_ACK,*(PUINT)&ack,(UINT)hSzItem);
if (!PostMessage((HWND)wParam,WM_DDE_ACK,(WPARAM)hwnd,lParam)) {
if(hSzItem) GlobalDeleteAtom(hSzItem);
FreeDDElParam(WM_DDE_ACK,lParam);
}
}
return 0;
}
}
return DefWindowProc(hwnd,msg,wParam,lParam);
}
// CloseHandle() the return value
static HANDLE StartupMainProcess(TCHAR *pszDatabasePath)
{
TCHAR *p,szPath[MAX_PATH];
/* we are inside RunDll32 here */
if (!GetModuleFileName(hInst,szPath,SIZEOF(szPath))) return NULL;
p=_tcsrchr(szPath,_T('\\'));
if(p!=NULL) { *p=0; p=_tcsrchr(szPath,_T('\\')); }
if(p==NULL) return NULL;
lstrcpy(++p,_T("miranda32.exe"));
/* inherit startup data from RunDll32 process */
STARTUPINFO si;
GetStartupInfo(&si);
PROCESS_INFORMATION pi;
if (!CreateProcess(szPath,pszDatabasePath,NULL,NULL,TRUE,GetPriorityClass(GetCurrentProcess()),NULL,NULL,&si,&pi))
return NULL;
CloseHandle(pi.hThread);
return pi.hProcess;
}
#ifdef __cplusplus
extern "C" {
#endif
// entry point for RunDll32, this is also WaitForDDEW
__declspec(dllexport) void CALLBACK WaitForDDE(HWND,HINSTANCE,TCHAR *pszCmdLine,int)
{
HANDLE pHandles[2];
DWORD dwTick;
/* wait for dde window to be available (avoiding race condition) */
pHandles[0]=CreateEvent(NULL,TRUE,FALSE,WNDCLASS_DDEMSGWINDOW);
if(pHandles[0]!=NULL) {
pHandles[1]=StartupMainProcess(pszCmdLine); /* obeys nCmdShow using GetStartupInfo() */
if(pHandles[1]!=NULL) {
dwTick=GetTickCount();
/* either process terminated or dde window created */
if(WaitForMultipleObjects(SIZEOF(pHandles),pHandles,FALSE,DDEMESSAGETIMEOUT)==WAIT_OBJECT_0) {
dwTick=GetTickCount()-dwTick;
if(dwTick<DDEMESSAGETIMEOUT)
WaitForInputIdle(pHandles[1],DDEMESSAGETIMEOUT-dwTick);
}
CloseHandle(pHandles[1]);
}
CloseHandle(pHandles[0]);
}
/* shell called WaitForInputIdle() on us to detect when dde is ready,
* we are ready now: exit helper process */
}
#ifdef __cplusplus
}
#endif
/************************* Misc ***********************************/
static int DdePreShutdown(WPARAM,LPARAM)
{
/* dde needs to be stopped before any plugins are unloaded */
if(hwndDdeMsg!=NULL) DestroyWindow(hwndDdeMsg);
UnregisterClass(WNDCLASS_DDEMSGWINDOW,hInst);
return 0;
}
static int DdeModulesLoaded2(WPARAM,LPARAM)
{
/* create message window */
WNDCLASS wcl;
wcl.lpfnWndProc=DdeMessageWindow;
wcl.cbClsExtra=0;
wcl.cbWndExtra=0;
wcl.hInstance=hInst;
wcl.hCursor=NULL;
wcl.lpszClassName=WNDCLASS_DDEMSGWINDOW;
wcl.hbrBackground=NULL;
wcl.hIcon=NULL;
wcl.lpszMenuName=NULL;
wcl.style=0;
RegisterClass(&wcl);
/* Note: use of HWND_MESSAGE does not fit for DDE as the window must be a top-level one */
hwndDdeMsg=CreateWindow(WNDCLASS_DDEMSGWINDOW,NULL,0,0,0,0,0,NULL,NULL,hInst,NULL);
/* make known dde startup code is passed */
HANDLE hEvent=OpenEvent(EVENT_MODIFY_STATE,FALSE,WNDCLASS_DDEMSGWINDOW);
if(hEvent!=NULL) {
SetEvent(hEvent);
CloseHandle(hEvent);
}
CleanupRegTreeBackupSettings();
CleanupMimeTypeAddedSettings();
CleanupAssocEnabledSettings();
return 0;
}
static int DdeModulesLoaded(WPARAM,LPARAM)
{
/* dde needs to be loaded after all the other plugins got loaded,
* hook again to get the latest position in chain */
UnhookEvent(hHookModulesLoaded);
hHookModulesLoaded=HookEvent(ME_SYSTEM_MODULESLOADED,DdeModulesLoaded2);
return 0;
}
void InitDde(void)
{
hHookModulesLoaded=HookEvent(ME_SYSTEM_MODULESLOADED,DdeModulesLoaded);
hHookPreShutdown=HookEvent(ME_SYSTEM_PRESHUTDOWN,DdePreShutdown);
}
void UninitDde(void)
{
UnhookEvent(hHookModulesLoaded);
UnhookEvent(hHookPreShutdown);
}
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