dllmain.cpp

// dllmain.

#include "stdafx.h"
#include "afxdllx.h"

#include "win32uiHostGlue.h"

static HWND GetConsoleHwnd(void);

HINSTANCE hWin32uiDll; // Handle to this DLL.
static AFX_EXTENSION_MODULE extensionDLL;
static CDynLinkLibrary *pDLL = NULL;

//BOOL PyWin_bIsWin32s; // global, and aint gunna change over 1 app lifetime!
BOOL PyWin_bHaveMFCHost = TRUE; // indicates if the CWinApp was locally created.

extern BOOL bInFatalShutdown;
extern void Win32uiFinalize();

class CInProcApp : public CWinApp
{
public:
	CInProcApp(LPCTSTR lpszAppName);
	Win32uiHostGlue glue;
	void CleanupMainWindow();

public:
	virtual BOOL InitInstance();
	virtual int ExitInstance() {
		glue.ExitInstance(); // ignore errors
		return CWinApp::ExitInstance();
	}
	DECLARE_MESSAGE_MAP()
private:
	virtual BOOL PreTranslateMessage(MSG *pMsg) {
			if (glue.PreTranslateMessage(pMsg))
				return TRUE;
			else
				return CWinApp::PreTranslateMessage(pMsg);
		}

	virtual BOOL OnIdle( LONG lCount) {
			// call base class idle first
			if (CWinApp::OnIdle(lCount))
				return TRUE;
			return glue.OnIdle(lCount);
		}
	BOOL OnCmdMsg (UINT nID, int nCode,
		       void* pExtra, AFX_CMDHANDLERINFO*pHandlerInfo) {
			// yield to Python first.
			if (glue.OnCmdMsg (this, nID, nCode, pExtra, pHandlerInfo))
				return TRUE;
			else
				return CWinApp::OnCmdMsg (nID, nCode, pExtra, pHandlerInfo);
		}
	// special idle handling to ignore WM_TIMER messages
	// (mainly for Scintilla until it uses WM_SYSTIMER messages)
	virtual BOOL IsIdleMessage(MSG *pmsg)
	{
		BOOL is = CWinApp::IsIdleMessage(pmsg);
		if (is) is = pmsg->message != WM_TIMER;
		return is;
	}

	BOOL m_bIsConsoleWindow;

};

static CInProcApp *pCreatedApp = NULL;

/////////////////////////////////////////////////////////////////////////////
// CInProcApp

BEGIN_MESSAGE_MAP(CInProcApp, CWinApp)
	//{{AFX_MSG_MAP(CInProcApp)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CInProcApp construction
CInProcApp::CInProcApp(LPCTSTR lpszAppName) :
	CWinApp(lpszAppName)
{
	PyWin_bHaveMFCHost = FALSE;
	m_bIsConsoleWindow = FALSE; // Assume not until we find otherwise.
	glue.bShouldAbandonThreadState = FALSE;
	// Place all significant initialization in InitInstance
	// if I have a console window, make it the main window.
	HWND main = GetConsoleHwnd();
	if (main) {
		CWnd *pWndMain = new CWnd();
		pWndMain->Attach(main);
		m_pMainWnd = pWndMain;
		m_bIsConsoleWindow = TRUE;
	}
}

/////////////////////////////////////////////////////////////////////////////
// CInProcApp initialization

BOOL CInProcApp::InitInstance()
{
	if (!glue.DynamicApplicationInit())
		return FALSE;
	return glue.InitInstance();
}

// Check that we have a valid CWinApp object to use.
bool CheckGoodWinApp() 
{
// Shouldnt need special symbols now that we delay the creation.
	// If the host exports a special symbol, then
	// dont create a host app.
//	HMODULE hModule = GetModuleHandle(NULL);
//	BOOL hasSymbol = (GetProcAddress(hModule, "NoCreateWinApp") != NULL);
	if (AfxGetApp()==NULL) { // && !hasSymbol) {
		// shared initialization
		pCreatedApp = new CInProcApp(_T("win32ui module"));

		// As we are looking for a WinApp, we are likely to be creating the
		// application object itself.  Trick MFC into thinking we are not
		// a DLL extension, but the app itself.
		AfxGetModuleState()->m_bDLL = 0; // XXX - todo - expose this to Python???

		// Do the WinMain thang...
		// AFX internal initialization
		if (!AfxWinInit(hWin32uiDll, NULL, _T(""), SW_NORMAL))
			return 0;

		// App global initializations (rare)
		ASSERT_VALID(pCreatedApp);
		if (!pCreatedApp->InitApplication())
			return 0;

		// Perform specific initializations
		if (!pCreatedApp->InitInstance())
		{
			pCreatedApp->CleanupMainWindow();
			pCreatedApp->ExitInstance();
			return 0;
		}
		ASSERT_VALID(pCreatedApp);
		if (AfxGetApp()==NULL)
			OutputDebugString(_T("Warning - still no CWinApp I can use!"));
	}
	return TRUE;
}

void CInProcApp::CleanupMainWindow()
{
	if (m_pMainWnd==NULL) return;

	if (m_bIsConsoleWindow) {
		Python_delete_assoc(m_pMainWnd);
		m_pMainWnd->Detach();
		delete m_pMainWnd;
		m_pMainWnd = NULL;
		m_bIsConsoleWindow = FALSE;
	} else {
		TRACE0("Warning: Destroying non-NULL m_pMainWnd\n");
		m_pMainWnd->DestroyWindow();
	}
}

#ifndef FREEZE_WIN32UI
extern "C" int __stdcall DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID)
#else
extern "C" __declspec(dllexport) int __stdcall DllMainwin32ui(HINSTANCE hInstance, DWORD dwReason, LPVOID)
#endif
		   
{
	if (dwReason == DLL_PROCESS_ATTACH) {
		hWin32uiDll = hInstance;
		// Get Win32s version, etc
//		OSVERSIONINFO ver;
//		ver.dwOSVersionInfoSize = sizeof(ver);
//		GetVersionEx(&ver);
//		PyWin_bIsWin32s = ver.dwPlatformId == VER_PLATFORM_WIN32s;

		TCHAR path[_MAX_PATH];
		GetModuleFileName(hInstance, path, sizeof(path)/sizeof(TCHAR));
#ifndef FREEZE_WIN32UI
		// Normal win32ui.pyd initialization
#ifdef _DEBUG
		TRACE("Extension module %s initialising.\n", path);
#endif
		// Extension DLL one-time initialization 
		if (!AfxInitExtensionModule(extensionDLL, hInstance))
			return 0;
		// insert into resource chain.
		pDLL = new CDynLinkLibrary(extensionDLL);

#else // Frozen .EXE that embedds win32ui is initializing
		TRACE("win32ui in frozen %s initializing.\n", path);
#endif
	} else if (dwReason == DLL_PROCESS_DETACH) {
//		Py_Cleanup();
// NOT safe to cleanup here - other DLLs may have already been unloaded

		// From this point on, trying to do anything would be pretty serious!
		// (believe it or not, CoUninitialize() called after this point will
		// still manage to call into this DLL!!
		bInFatalShutdown = TRUE;

		if (pCreatedApp) {

			pCreatedApp->CleanupMainWindow();
			// We dont call ExitInstance, as the InitInstance we called could
			// not have possibly called back to Python, as the Python app object
			// could not have been created.  Let the Python code manage if it wants!
			Win32uiFinalize();
			AfxWinTerm();
			afxCurrentWinApp = NULL; // So AfxGetApp fails from here.
			delete pCreatedApp;
			pCreatedApp = NULL;
		}
		// Only delete the Library if not already autodeleted by resource chain.
		AFX_MODULE_STATE* pafxmostState  = AfxGetModuleState();
		if(NULL != pafxmostState && !pafxmostState->m_libraryList.IsEmpty()) {
			CDynLinkLibrary* pdynDll = pafxmostState->m_libraryList.GetHead();
			while (NULL != pdynDll && NULL != pDLL) {
				if(pdynDll == pDLL) {
					delete pDLL;
					pDLL = NULL;
					break;
				}
				pdynDll = pafxmostState->m_libraryList.GetNext(pdynDll);
			}
		}
	}
	return 1;   // ok
}

// straight from the SDK.
HWND GetConsoleHwnd(void)
{
    #define MY_BUFSIZE 1024 // buffer size for console window titles
    HWND hwndFound;         // this is what is returned to the caller
    TCHAR pszNewWindowTitle[MY_BUFSIZE]; // contains fabricated WindowTitle
    TCHAR pszOldWindowTitle[MY_BUFSIZE]; // contains original WindowTitle
 
    // fetch current window title
    if (GetConsoleTitle(pszOldWindowTitle, MY_BUFSIZE)==0)
		return NULL;

 
    // format a "unique" NewWindowTitle
    wsprintf(pszNewWindowTitle, _T("%d/%d"),
                GetTickCount(),
                GetCurrentProcessId());
 
    // change current window title
    SetConsoleTitle(pszNewWindowTitle);
 
    // ensure window title has been updated
    Sleep(40);
 
    // look for NewWindowTitle
    hwndFound=FindWindow(NULL, pszNewWindowTitle);
 
    // restore original window title
    SetConsoleTitle(pszOldWindowTitle);
 
    return(hwndFound);
}