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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 "stdafx.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)
{
wchar_t *pszFilePath = (wchar_t*)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)
{
wchar_t *pszUrl = (wchar_t*)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 L"MirandaDdeMsgWindow"
// returned pointer points into a substring of ppszString
// returns an empty string if the string does not have enough arguments
static wchar_t* GetExecuteParam(wchar_t **ppszString)
{
bool fQuoted = (**ppszString == '"');
wchar_t *pszParam = *ppszString;
if (fQuoted)
pszParam++;
wchar_t *p = wcschr(pszParam, (wchar_t)(fQuoted ? '"' : ','));
if (p != nullptr) {
*(p++) = 0;
if (fQuoted && *p == ',') p++;
}
else p = &pszParam[mir_wstrlen(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;
if (UnpackDDElParam(msg, lParam, nullptr, (PUINT_PTR)&hCommand)) {
/* ANSI execute command can't happen for shell */
if (IsWindowUnicode((HWND)wParam)) {
wchar_t *pszCommand = (wchar_t*)GlobalLock(hCommand);
if (pszCommand != nullptr) {
wchar_t *pszAction = GetExecuteParam(&pszCommand);
wchar_t *pszArg = GetExecuteParam(&pszCommand);
if (pszArg != nullptr) {
/* we are inside miranda here, we make it async so the shell does
* not timeout regardless what the plugins try to do. */
if (!mir_wstrcmpi(pszAction, L"file"))
CallFunctionAsync(FileActionAsync, mir_wstrdup(pszArg));
else if (!mir_wstrcmpi(pszAction, L"url"))
CallFunctionAsync(UrlActionAsync, mir_wstrdup(pszArg));
}
GlobalUnlock(hCommand);
}
}
DDEACK ack;
memset(&ack, 0, sizeof(ack));
lParam = ReuseDDElParam(lParam, msg, WM_DDE_ACK, *(PUINT)&ack, (UINT_PTR)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;
memset(&ack, 0, sizeof(ack));
if (UnpackDDElParam(msg, lParam, nullptr, (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(wchar_t *pszDatabasePath)
{
wchar_t *p, szPath[MAX_PATH];
/* we are inside RunDll32 here */
if (!GetModuleFileName(hInst, szPath, _countof(szPath))) return nullptr;
p = wcsrchr(szPath, '\\');
if (p != nullptr) { *p = 0; p = wcsrchr(szPath, '\\'); }
if (p == nullptr) return nullptr;
mir_wstrcpy(++p, L"miranda32.exe");
/* inherit startup data from RunDll32 process */
STARTUPINFO si;
GetStartupInfo(&si);
PROCESS_INFORMATION pi;
if (!CreateProcess(szPath, pszDatabasePath, nullptr, nullptr, TRUE, GetPriorityClass(GetCurrentProcess()), nullptr, nullptr, &si, &pi))
return nullptr;
CloseHandle(pi.hThread);
return pi.hProcess;
}
// entry point for RunDll32, this is also WaitForDDEW
EXTERN_C __declspec(dllexport) void CALLBACK WaitForDDE(HWND, HINSTANCE, wchar_t *pszCmdLine, int)
{
// executed to initialize path for delay-loaded libraries
DynamicLoadInit();
/* wait for dde window to be available (avoiding race condition) */
HANDLE pHandles[2];
pHandles[0] = CreateEvent(nullptr, TRUE, FALSE, WNDCLASS_DDEMSGWINDOW);
if (pHandles[0] != nullptr) {
pHandles[1] = StartupMainProcess(pszCmdLine); /* obeys nCmdShow using GetStartupInfo() */
if (pHandles[1] != nullptr) {
DWORD dwTick = GetTickCount();
/* either process terminated or dde window created */
if (WaitForMultipleObjects(_countof(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 */
}
/************************* Misc ***********************************/
static int DdePreShutdown(WPARAM, LPARAM)
{
/* dde needs to be stopped before any plugins are unloaded */
if (hwndDdeMsg != nullptr) 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 = nullptr;
wcl.lpszClassName = WNDCLASS_DDEMSGWINDOW;
wcl.hbrBackground = nullptr;
wcl.hIcon = nullptr;
wcl.lpszMenuName = nullptr;
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, nullptr, 0, 0, 0, 0, 0, nullptr, nullptr, hInst, nullptr);
/* make known dde startup code is passed */
HANDLE hEvent = OpenEvent(EVENT_MODIFY_STATE, FALSE, WNDCLASS_DDEMSGWINDOW);
if (hEvent != nullptr) {
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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