X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/6ba636000f13b4bf7d3e7dcfad429713085f6700..2d3112adc94f2ecdbcfcacf32576f47345e762ae:/src/msw/utilsexc.cpp diff --git a/src/msw/utilsexc.cpp b/src/msw/utilsexc.cpp index 26f8ca415f..628d647ac2 100644 --- a/src/msw/utilsexc.cpp +++ b/src/msw/utilsexc.cpp @@ -315,6 +315,49 @@ LRESULT APIENTRY _EXPORT wxExecuteWindowCbk(HWND hWnd, UINT message, } #endif // Win32 +#if wxUSE_IPC + +// connect to the given server via DDE and ask it to execute the command +static bool wxExecuteDDE(const wxString& ddeServer, + const wxString& ddeTopic, + const wxString& ddeCommand) +{ + bool ok; + + wxDDEClient client; + wxConnectionBase *conn = client.MakeConnection(_T(""), + ddeServer, + ddeTopic); + if ( !conn ) + { + ok = FALSE; + } + else // connected to DDE server + { + // the added complication here is that although most + // programs use XTYP_EXECUTE for their DDE API, some + // important ones - like IE and other MS stuff - use + // XTYP_REQUEST! + // + // so we try it first and then the other one if it + // failed + { + wxLogNull noErrors; + ok = conn->Request(ddeCommand) != NULL; + } + + if ( !ok ) + { + // now try execute - but show the errors + ok = conn->Execute(ddeCommand); + } + } + + return ok; +} + +#endif // wxUSE_IPC + long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) { wxCHECK_MSG( !!cmd, 0, wxT("empty command in wxExecute") ); @@ -334,6 +377,11 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) static const size_t lenDdePrefix = 7; // strlen("WX_DDE:") if ( cmd.Left(lenDdePrefix) == _T("WX_DDE#") ) { + // speed up the concatenations below + ddeServer.reserve(256); + ddeTopic.reserve(256); + ddeCommand.reserve(256); + const wxChar *p = cmd.c_str() + 7; while ( *p && *p != _T('#') ) { @@ -385,27 +433,21 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) ddeCommand += *p++; } - // maybe we don't have to launch the DDE server at all - if it is - // already running, for example - wxDDEClient client; - wxLogNull nolog; - wxConnectionBase *conn = client.MakeConnection(_T(""), - ddeServer, - ddeTopic); - if ( conn ) + // if we want to just launch the program and not wait for its + // termination, try to execute DDE command right now, it can succeed if + // the process is already running - but as it fails if it's not + // running, suppress any errors it might generate + if ( !sync ) { - // FIXME we don't check the return code as for some strange reason - // it will sometimes be FALSE - it is probably a bug in our - // DDE code but I don't see anything wrong there - (void)conn->Execute(ddeCommand); - - // ok, the command executed - return value indicating success, - // making it up for async case as we really don't have any way to - // get the real PID of the DDE server here - return sync ? 0 : -1; + wxLogNull noErrors; + if ( wxExecuteDDE(ddeServer, ddeTopic, ddeCommand) ) + { + // a dummy PID - this is a hack, of course, but it's well worth + // it as we don't open a new server each time we're called + // which would be quite bad + return -1; + } } - //else: couldn't establish DDE conversation, now try launching the app - // and sending the DDE request again } else #endif // wxUSE_IPC @@ -421,9 +463,9 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) #if wxUSE_STREAMS // the first elements are reading ends, the second are the writing ones HANDLE hpipeStdin[2], - hpipeStdinWrite = INVALID_HANDLE_VALUE, hpipeStdout[2], hpipeStderr[2]; + HANDLE hpipeStdinWrite = INVALID_HANDLE_VALUE; // open the pipes to which child process IO will be redirected if needed if ( handler && handler->IsRedirected() ) @@ -637,40 +679,33 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) #if wxUSE_IPC // second part of DDE hack: now establish the DDE conversation with the // just launched process - if ( !!ddeServer ) + if ( !ddeServer.empty() ) { - wxDDEClient client; - wxConnectionBase *conn; - + bool ok; + + // give the process the time to init itself + // + // we use a very big timeout hoping that WaitForInputIdle() will return + // much sooner, but not INFINITE just in case the process hangs + // completely - like this we will regain control sooner or later + switch ( ::WaitForInputIdle(pi.hProcess, 10000 /* 10 seconds */) ) { - // try doing it the first time without error messages - wxLogNull nolog; + default: + wxFAIL_MSG( _T("unexpected WaitForInputIdle() return code") ); + // fall through - conn = client.MakeConnection(_T(""), ddeServer, ddeTopic); - } + case -1: + wxLogLastError(_T("WaitForInputIdle() in wxExecute")); - if ( !conn ) - { - // give the app some time to initialize itself: in fact, a common - // reason for failure is that we tried to open DDE conversation too - // soon (before the app had time to setup its DDE server), so wait - // a bit and try again - ::Sleep(2000); - - wxConnectionBase *conn = client.MakeConnection(_T(""), - ddeServer, - ddeTopic); - if ( !conn ) - { - wxLogError(_("Couldn't launch DDE server '%s'."), command.c_str()); - } - } + case WAIT_TIMEOUT: + wxLogDebug(_T("Timeout too small in WaitForInputIdle")); - if ( conn ) - { - // FIXME just as above we don't check Execute() return code - wxLogNull nolog; - (void)conn->Execute(ddeCommand); + ok = FALSE; + break; + + case 0: + // ok, process ready to accept DDE requests + ok = wxExecuteDDE(ddeServer, ddeTopic, ddeCommand); } } #endif // wxUSE_IPC @@ -733,40 +768,3 @@ long wxExecute(char **argv, bool sync, wxProcess *handler) return wxExecute(command, sync, handler); } -#if wxUSE_GUI - -// ---------------------------------------------------------------------------- -// Metafile helpers -// ---------------------------------------------------------------------------- - -extern void PixelToHIMETRIC(LONG *x, LONG *y) -{ - ScreenHDC hdcRef; - - int iWidthMM = GetDeviceCaps(hdcRef, HORZSIZE), - iHeightMM = GetDeviceCaps(hdcRef, VERTSIZE), - iWidthPels = GetDeviceCaps(hdcRef, HORZRES), - iHeightPels = GetDeviceCaps(hdcRef, VERTRES); - - *x *= (iWidthMM * 100); - *x /= iWidthPels; - *y *= (iHeightMM * 100); - *y /= iHeightPels; -} - -extern void HIMETRICToPixel(LONG *x, LONG *y) -{ - ScreenHDC hdcRef; - - int iWidthMM = GetDeviceCaps(hdcRef, HORZSIZE), - iHeightMM = GetDeviceCaps(hdcRef, VERTSIZE), - iWidthPels = GetDeviceCaps(hdcRef, HORZRES), - iHeightPels = GetDeviceCaps(hdcRef, VERTRES); - - *x *= iWidthPels; - *x /= (iWidthMM * 100); - *y *= iHeightPels; - *y /= (iHeightMM * 100); -} - -#endif // wxUSE_GUI