/////////////////////////////////////////////////////////////////////////////
// Name: msw/utilsexec.cpp
-// Purpose: Various utilities
+// Purpose: wxExecute implementation for MSW
// Author: Julian Smart
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
-// Copyright: (c) Julian Smart and Markus Holzem
-// Licence: wxWindows license
+// Copyright: (c) 1998-2002 wxWindows dev team
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
#include "wx/utils.h"
#include "wx/app.h"
#include "wx/intl.h"
+ #include "wx/log.h"
+ #if wxUSE_GUI // See 'dirty hack' below.
+ #include "wx/frame.h"
+ #endif
#endif
-#include "wx/log.h"
-
#ifdef __WIN32__
+ #include "wx/stream.h"
#include "wx/process.h"
#endif
#include <ctype.h>
-#if !defined(__GNUWIN32__) && !defined(__WXWINE__) && !defined(__SALFORDC__)
+#if !defined(__GNUWIN32__) && !defined(__SALFORDC__) && !defined(__WXMICROWIN__)
#include <direct.h>
#ifndef __MWERKS__
#include <dos.h>
#include <sys/stat.h>
#endif
-#if defined(__WIN32__) && !defined(__WXWINE__)
-#include <io.h>
+#if defined(__WIN32__) && !defined(__WXMICROWIN__)
+#ifndef __UNIX__
+ #include <io.h>
+#endif
#ifndef __GNUWIN32__
#include <shellapi.h>
#ifndef __WIN16__
if ( !::CloseHandle(hProcess) )
{
- wxLogLastError("CloseHandle(hProcess)");
+ wxLogLastError(wxT("CloseHandle(hProcess)"));
}
#endif
}
bool state; // set to FALSE when the process finishes
};
+#if defined(__WIN32__) && wxUSE_STREAMS
+
+// ----------------------------------------------------------------------------
+// wxPipeStreams
+// ----------------------------------------------------------------------------
+
+class wxPipeInputStream: public wxInputStream
+{
+public:
+ wxPipeInputStream(HANDLE hInput);
+ virtual ~wxPipeInputStream();
+
+ // returns TRUE if the pipe is still opened
+ bool IsOpened() const { return m_hInput != INVALID_HANDLE_VALUE; }
+
+ // returns TRUE if there is any data to be read from the pipe
+ virtual bool CanRead() const;
+
+protected:
+ size_t OnSysRead(void *buffer, size_t len);
+
+protected:
+ HANDLE m_hInput;
+
+ DECLARE_NO_COPY_CLASS(wxPipeInputStream)
+};
+
+class wxPipeOutputStream: public wxOutputStream
+{
+public:
+ wxPipeOutputStream(HANDLE hOutput);
+ virtual ~wxPipeOutputStream();
+
+protected:
+ size_t OnSysWrite(const void *buffer, size_t len);
+
+protected:
+ HANDLE m_hOutput;
+
+ DECLARE_NO_COPY_CLASS(wxPipeOutputStream)
+};
+
+// define this to let wxexec.cpp know that we know what we're doing
+#define _WX_USED_BY_WXEXECUTE_
+#include "../common/execcmn.cpp"
+
+// ----------------------------------------------------------------------------
+// wxPipe represents a Win32 anonymous pipe
+// ----------------------------------------------------------------------------
+
+class wxPipe
+{
+public:
+ // the symbolic names for the pipe ends
+ enum Direction
+ {
+ Read,
+ Write
+ };
+
+ // default ctor doesn't do anything
+ wxPipe() { m_handles[Read] = m_handles[Write] = INVALID_HANDLE_VALUE; }
+
+ // create the pipe, return TRUE if ok, FALSE on error
+ bool Create()
+ {
+ // default secutiry attributes
+ SECURITY_ATTRIBUTES security;
+
+ security.nLength = sizeof(security);
+ security.lpSecurityDescriptor = NULL;
+ security.bInheritHandle = TRUE; // to pass it to the child
+
+ if ( !::CreatePipe(&m_handles[0], &m_handles[1], &security, 0) )
+ {
+ wxLogSysError(_("Failed to create an anonymous pipe"));
+
+ return FALSE;
+ }
+
+ return TRUE;
+ }
+
+ // return TRUE if we were created successfully
+ bool IsOk() const { return m_handles[Read] != INVALID_HANDLE_VALUE; }
+
+ // return the descriptor for one of the pipe ends
+ HANDLE operator[](Direction which) const
+ {
+ wxASSERT_MSG( which >= 0 && (size_t)which < WXSIZEOF(m_handles),
+ _T("invalid pipe index") );
+
+ return m_handles[which];
+ }
+
+ // detach a descriptor, meaning that the pipe dtor won't close it, and
+ // return it
+ HANDLE Detach(Direction which)
+ {
+ wxASSERT_MSG( which >= 0 && (size_t)which < WXSIZEOF(m_handles),
+ _T("invalid pipe index") );
+
+ HANDLE handle = m_handles[which];
+ m_handles[which] = INVALID_HANDLE_VALUE;
+
+ return handle;
+ }
+
+ // close the pipe descriptors
+ void Close()
+ {
+ for ( size_t n = 0; n < WXSIZEOF(m_handles); n++ )
+ {
+ if ( m_handles[n] != INVALID_HANDLE_VALUE )
+ {
+ ::CloseHandle(m_handles[n]);
+ m_handles[n] = INVALID_HANDLE_VALUE;
+ }
+ }
+ }
+
+ // dtor closes the pipe descriptors
+ ~wxPipe() { Close(); }
+
+private:
+ HANDLE m_handles[2];
+};
+
+#endif // wxUSE_STREAMS
+
// ============================================================================
// implementation
// ============================================================================
#ifdef __WIN32__
-static DWORD wxExecuteThread(wxExecuteData *data)
+
+// ----------------------------------------------------------------------------
+// process termination detecting support
+// ----------------------------------------------------------------------------
+
+// thread function for the thread monitoring the process termination
+static DWORD __stdcall wxExecuteThread(void *arg)
{
- WaitForSingleObject(data->hProcess, INFINITE);
+ wxExecuteData * const data = (wxExecuteData *)arg;
+
+ if ( ::WaitForSingleObject(data->hProcess, INFINITE) != WAIT_OBJECT_0 )
+ {
+ wxLogDebug(_T("Waiting for the process termination failed!"));
+ }
// get the exit code
- if ( !GetExitCodeProcess(data->hProcess, &data->dwExitCode) )
+ if ( !::GetExitCodeProcess(data->hProcess, &data->dwExitCode) )
{
- wxLogLastError("GetExitCodeProcess");
+ wxLogLastError(wxT("GetExitCodeProcess"));
}
wxASSERT_MSG( data->dwExitCode != STILL_ACTIVE,
wxT("process should have terminated") );
// send a message indicating process termination to the window
- SendMessage(data->hWnd, wxWM_PROC_TERMINATED, 0, (LPARAM)data);
+ ::SendMessage(data->hWnd, wxWM_PROC_TERMINATED, 0, (LPARAM)data);
return 0;
}
{
DestroyWindow(hWnd); // we don't need it any more
- wxExecuteData *data = (wxExecuteData *)lParam;
+ wxExecuteData * const data = (wxExecuteData *)lParam;
if ( data->handler )
{
data->handler->OnTerminate((int)data->dwProcessId,
}
else
{
- return DefWindowProc(hWnd, message, wParam, lParam);
+ return ::DefWindowProc(hWnd, message, wParam, lParam);
+ }
+}
+
+// ============================================================================
+// implementation of IO redirection support classes
+// ============================================================================
+
+#if wxUSE_STREAMS
+
+// ----------------------------------------------------------------------------
+// wxPipeInputStreams
+// ----------------------------------------------------------------------------
+
+wxPipeInputStream::wxPipeInputStream(HANDLE hInput)
+{
+ m_hInput = hInput;
+}
+
+wxPipeInputStream::~wxPipeInputStream()
+{
+ if ( m_hInput != INVALID_HANDLE_VALUE )
+ ::CloseHandle(m_hInput);
+}
+
+bool wxPipeInputStream::CanRead() const
+{
+ if ( !IsOpened() )
+ return FALSE;
+
+ DWORD nAvailable;
+
+ // function name is misleading, it works with anon pipes as well
+ DWORD rc = ::PeekNamedPipe
+ (
+ m_hInput, // handle
+ NULL, 0, // ptr to buffer and its size
+ NULL, // [out] bytes read
+ &nAvailable, // [out] bytes available
+ NULL // [out] bytes left
+ );
+
+ if ( !rc )
+ {
+ if ( ::GetLastError() != ERROR_BROKEN_PIPE )
+ {
+ // unexpected error
+ wxLogLastError(_T("PeekNamedPipe"));
+ }
+
+ // don't try to continue reading from a pipe if an error occured or if
+ // it had been closed
+ ::CloseHandle(m_hInput);
+
+ wxPipeInputStream *self = wxConstCast(this, wxPipeInputStream);
+
+ self->m_hInput = INVALID_HANDLE_VALUE;
+ self->m_lasterror = wxSTREAM_EOF;
+
+ nAvailable = 0;
}
+
+ return nAvailable != 0;
+}
+
+size_t wxPipeInputStream::OnSysRead(void *buffer, size_t len)
+{
+ if ( !IsOpened() )
+ {
+ m_lasterror = wxSTREAM_EOF;
+
+ return 0;
+ }
+
+ DWORD bytesRead;
+ if ( !::ReadFile(m_hInput, buffer, len, &bytesRead, NULL) )
+ {
+ m_lasterror = ::GetLastError() == ERROR_BROKEN_PIPE
+ ? wxSTREAM_EOF
+ : wxSTREAM_READ_ERROR;
+ }
+
+ // bytesRead is set to 0, as desired, if an error occured
+ return bytesRead;
+}
+
+// ----------------------------------------------------------------------------
+// wxPipeOutputStream
+// ----------------------------------------------------------------------------
+
+wxPipeOutputStream::wxPipeOutputStream(HANDLE hOutput)
+{
+ m_hOutput = hOutput;
}
+
+wxPipeOutputStream::~wxPipeOutputStream()
+{
+ ::CloseHandle(m_hOutput);
+}
+
+size_t wxPipeOutputStream::OnSysWrite(const void *buffer, size_t len)
+{
+ DWORD bytesWritten;
+
+ m_lasterror = wxSTREAM_NO_ERROR;
+ if ( !::WriteFile(m_hOutput, buffer, len, &bytesWritten, NULL) )
+ {
+ m_lasterror = ::GetLastError() == ERROR_BROKEN_PIPE
+ ? wxSTREAM_EOF
+ : wxSTREAM_WRITE_ERROR;
+ }
+
+ return bytesWritten;
+}
+
+#endif // wxUSE_STREAMS
+
#endif // Win32
-long wxExecute(const wxString& cmd, bool sync, wxProcess *handler)
+// ============================================================================
+// wxExecute functions family
+// ============================================================================
+
+#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 = FALSE;
+
+ 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 one first and then the other one if it
+ // failed
+ {
+ wxLogNull noErrors;
+ ok = conn->Execute(ddeCommand);
+ }
+
+ if ( !ok )
+ {
+ // now try request - but show the errors
+ ok = conn->Request(ddeCommand) != NULL;
+ }
+ }
+
+ return ok;
+}
+
+#endif // wxUSE_IPC
+
+long wxExecute(const wxString& cmd, int flags, wxProcess *handler)
{
wxCHECK_MSG( !!cmd, 0, wxT("empty command in wxExecute") );
+#if wxUSE_THREADS
+ // for many reasons, the code below breaks down if it's called from another
+ // thread -- this could be fixed, but as Unix versions don't support this
+ // neither I don't want to waste time on this now
+ wxASSERT_MSG( wxThread::IsMain(),
+ _T("wxExecute() can be called only from the main thread") );
+#endif // wxUSE_THREADS
+
+ wxString command;
+
#if wxUSE_IPC
// DDE hack: this is really not pretty, but we need to allow this for
// transparent handling of DDE servers in wxMimeTypesManager. Usually it
// given type. Sometimes, however, this command just launches the server
// and an additional DDE request must be made to really open the file. To
// keep all this well hidden from the application, we allow a special form
- // of command: WX_DDE:<command>:DDE_SERVER:DDE_TOPIC:DDE_COMMAND in which
+ // of command: WX_DDE#<command>#DDE_SERVER#DDE_TOPIC#DDE_COMMAND in which
// case we execute just <command> and process the rest below
- wxString command, ddeServer, ddeTopic, ddeCommand;
+ wxString ddeServer, ddeTopic, ddeCommand;
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('#') )
{
{
ddeCommand += *p++;
}
+
+ // 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 ( !(flags & wxEXEC_SYNC) )
+ {
+ 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
#endif // wxUSE_IPC
}
#if defined(__WIN32__) && !defined(__TWIN32__)
- // the old code is disabled because we really need a process handle
- // if we want to execute it asynchronously or even just get its
- // return code and for this we must use CreateProcess() and not
- // ShellExecute()
-#if 0
- // isolate command and arguments
- wxString commandName;
- bool insideQuotes = FALSE;
- const char *pc;
- for ( pc = command.c_str(); *pc != '\0'; pc++ )
- {
- switch ( *pc )
- {
- case ' ':
- case '\t':
- if ( !insideQuotes )
- break;
- // fall through
-
- case '"':
- insideQuotes = !insideQuotes;
- // fall through
- default:
- commandName += *pc;
- continue; // skip the next break
- }
-
- // only reached for space not inside quotes
- break;
- }
+ // the IO redirection is only supported with wxUSE_STREAMS
+ BOOL redirect = FALSE;
- wxString commandArgs = pc;
+#if wxUSE_STREAMS
+ wxPipe pipeIn, pipeOut, pipeErr;
- wxWindow *winTop = wxTheApp->GetTopWindow();
- HWND hwndTop = (HWND)(winTop ? winTop->GetHWND() : 0);
+ // we'll save here the copy of pipeIn[Write]
+ HANDLE hpipeStdinWrite = INVALID_HANDLE_VALUE;
- HANDLE result;
-#ifdef __GNUWIN32__
- result = ShellExecute(hwndTop,
- (const wchar_t)"open",
- (const wchar_t)commandName,
- (const wchar_t)commandArgs,
- (const wchar_t)NULL,
- SW_SHOWNORMAL);
-#else // !GNUWIN32
- result = ShellExecute(hwndTop, "open", commandName,
- commandArgs, NULL, SW_SHOWNORMAL);
-#endif // GNUWIN32
+ // open the pipes to which child process IO will be redirected if needed
+ if ( handler && handler->IsRedirected() )
+ {
+ // create pipes for redirecting stdin, stdout and stderr
+ if ( !pipeIn.Create() || !pipeOut.Create() || !pipeErr.Create() )
+ {
+ wxLogSysError(_("Failed to redirect the child process IO"));
- if ( ((long)result) <= 32 )
- wxLogSysError(_("Can't execute command '%s'"), command.c_str());
+ // indicate failure: we need to return different error code
+ // depending on the sync flag
+ return flags & wxEXEC_SYNC ? -1 : 0;
+ }
- return result;
-#else // 1
+ redirect = TRUE;
+ }
+#endif // wxUSE_STREAMS
// create the process
STARTUPINFO si;
wxZeroMemory(si);
-
si.cb = sizeof(si);
+#if wxUSE_STREAMS
+ if ( redirect )
+ {
+ si.dwFlags = STARTF_USESTDHANDLES;
+
+ si.hStdInput = pipeIn[wxPipe::Read];
+ si.hStdOutput = pipeOut[wxPipe::Write];
+ si.hStdError = pipeErr[wxPipe::Write];
+
+ // when the std IO is redirected, we don't show the (console) process
+ // window by default, but this can be overridden by the caller by
+ // specifying wxEXEC_NOHIDE flag
+ if ( !(flags & wxEXEC_NOHIDE) )
+ {
+ si.dwFlags |= STARTF_USESHOWWINDOW;
+ si.wShowWindow = SW_HIDE;
+ }
+
+ // we must duplicate the handle to the write side of stdin pipe to make
+ // it non inheritable: indeed, we must close the writing end of pipeIn
+ // before launching the child process as otherwise this handle will be
+ // inherited by the child which will never close it and so the pipe
+ // will never be closed and the child will be left stuck in ReadFile()
+ HANDLE pipeInWrite = pipeIn.Detach(wxPipe::Write);
+ if ( !::DuplicateHandle
+ (
+ ::GetCurrentProcess(),
+ pipeInWrite,
+ ::GetCurrentProcess(),
+ &hpipeStdinWrite,
+ 0, // desired access: unused here
+ FALSE, // not inherited
+ DUPLICATE_SAME_ACCESS // same access as for src handle
+ ) )
+ {
+ wxLogLastError(_T("DuplicateHandle"));
+ }
+
+ ::CloseHandle(pipeInWrite);
+ }
+#endif // wxUSE_STREAMS
+
PROCESS_INFORMATION pi;
+ DWORD dwFlags = CREATE_DEFAULT_ERROR_MODE | CREATE_SUSPENDED;
+
+ bool ok = ::CreateProcess
+ (
+ NULL, // application name (use only cmd line)
+ (wxChar *)
+ command.c_str(), // full command line
+ NULL, // security attributes: defaults for both
+ NULL, // the process and its main thread
+ redirect, // inherit handles if we use pipes
+ dwFlags, // process creation flags
+ NULL, // environment (use the same)
+ NULL, // current directory (use the same)
+ &si, // startup info (unused here)
+ &pi // process info
+ ) != 0;
+
+#if wxUSE_STREAMS
+ // we can close the pipe ends used by child anyhow
+ if ( redirect )
+ {
+ ::CloseHandle(pipeIn.Detach(wxPipe::Read));
+ ::CloseHandle(pipeOut.Detach(wxPipe::Write));
+ ::CloseHandle(pipeErr.Detach(wxPipe::Write));
+ }
+#endif // wxUSE_STREAMS
- if ( ::CreateProcess(
- NULL, // application name (use only cmd line)
- (wxChar *)command.c_str(), // full command line
- NULL, // security attributes: defaults for both
- NULL, // the process and its main thread
- FALSE, // don't inherit handles
- CREATE_DEFAULT_ERROR_MODE |
- CREATE_SUSPENDED, // flags
- NULL, // environment (use the same)
- NULL, // current directory (use the same)
- &si, // startup info (unused here)
- &pi // process info
- ) == 0 )
+ if ( !ok )
{
+#if wxUSE_STREAMS
+ // close the other handles too
+ if ( redirect )
+ {
+ ::CloseHandle(pipeOut.Detach(wxPipe::Read));
+ ::CloseHandle(pipeErr.Detach(wxPipe::Read));
+ }
+#endif // wxUSE_STREAMS
+
wxLogSysError(_("Execution of command '%s' failed"), command.c_str());
- return 0;
+ return flags & wxEXEC_SYNC ? -1 : 0;
}
+#if wxUSE_STREAMS
+ // the input buffer bufOut is connected to stdout, this is why it is
+ // called bufOut and not bufIn
+ wxStreamTempInputBuffer bufOut,
+ bufErr;
+
+ if ( redirect )
+ {
+ // We can now initialize the wxStreams
+ wxPipeInputStream *
+ outStream = new wxPipeInputStream(pipeOut.Detach(wxPipe::Read));
+ wxPipeInputStream *
+ errStream = new wxPipeInputStream(pipeErr.Detach(wxPipe::Read));
+ wxPipeOutputStream *
+ inStream = new wxPipeOutputStream(hpipeStdinWrite);
+
+ handler->SetPipeStreams(outStream, inStream, errStream);
+
+ bufOut.Init(outStream);
+ bufErr.Init(errStream);
+ }
+#endif // wxUSE_STREAMS
+
// register the class for the hidden window used for the notifications
if ( !gs_classForHiddenWindow )
{
if ( !::RegisterClass(&wndclass) )
{
- wxLogLastError("RegisterClass(hidden window)");
+ wxLogLastError(wxT("RegisterClass(hidden window)"));
}
}
data->hProcess = pi.hProcess;
data->dwProcessId = pi.dwProcessId;
data->hWnd = hwnd;
- data->state = sync;
- if ( sync )
+ data->state = (flags & wxEXEC_SYNC) != 0;
+ if ( flags & wxEXEC_SYNC )
{
- wxASSERT_MSG( !handler, wxT("wxProcess param ignored for sync execution") );
-
+ // handler may be !NULL for capturing program output, but we don't use
+ // it wxExecuteData struct in this case
data->handler = NULL;
}
else
DWORD tid;
HANDLE hThread = ::CreateThread(NULL,
0,
- (LPTHREAD_START_ROUTINE)wxExecuteThread,
+ wxExecuteThread,
(void *)data,
0,
&tid);
if ( ::ResumeThread(pi.hThread) == (DWORD)-1 )
{
// ignore it - what can we do?
- wxLogLastError("ResumeThread in wxExecute");
+ wxLogLastError(wxT("ResumeThread in wxExecute"));
}
// close unneeded handle
if ( !::CloseHandle(pi.hThread) )
- wxLogLastError("CloseHandle(hThread)");
+ wxLogLastError(wxT("CloseHandle(hThread)"));
if ( !hThread )
{
- wxLogLastError("CreateThread in wxExecute");
+ wxLogLastError(wxT("CreateThread in wxExecute"));
DestroyWindow(hwnd);
delete data;
return pi.dwProcessId;
}
+ ::CloseHandle(hThread);
+
#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 = client.MakeConnection(_T(""),
- ddeServer,
- ddeTopic);
- if ( !conn || !conn->Execute(ddeCommand) )
+ 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 */) )
{
- wxLogError(_("Couldn't launch DDE server '%s'."), command.c_str());
+ default:
+ wxFAIL_MSG( _T("unexpected WaitForInputIdle() return code") );
+ // fall through
+
+ case -1:
+ wxLogLastError(_T("WaitForInputIdle() in wxExecute"));
+
+ case WAIT_TIMEOUT:
+ wxLogDebug(_T("Timeout too small in WaitForInputIdle"));
+
+ ok = FALSE;
+ break;
+
+ case 0:
+ // ok, process ready to accept DDE requests
+ ok = wxExecuteDDE(ddeServer, ddeTopic, ddeCommand);
}
}
#endif // wxUSE_IPC
- if ( !sync )
+ if ( !(flags & wxEXEC_SYNC) )
{
// clean up will be done when the process terminates
return pi.dwProcessId;
}
- // waiting until command executed (disable everything while doing it)
+ // disable all app windows while waiting for the child process to finish
#if wxUSE_GUI
- wxBeginBusyCursor();
- wxEnableTopLevelWindows(FALSE);
+
+ /*
+ We use a dirty hack here to disable all application windows (which we
+ must do because otherwise the calls to wxYield() could lead to some very
+ unexpected reentrancies in the users code) but to avoid losing
+ focus/activation entirely when the child process terminates which would
+ happen if we simply disabled everything using wxWindowDisabler. Indeed,
+ remember that Windows will never activate a disabled window and when the
+ last childs window is closed and Windows looks for a window to activate
+ all our windows are still disabled. There is no way to enable them in
+ time because we don't know when the childs windows are going to be
+ closed, so the solution we use here is to keep one special tiny frame
+ enabled all the time. Then when the child terminates it will get
+ activated and when we close it below -- after reenabling all the other
+ windows! -- the previously active window becomes activated again and
+ everything is ok.
+ */
+ wxWindow *winActive;
+ {
+ wxBusyCursor bc;
+
+ // first disable all existing windows
+ wxWindowDisabler wd;
+
+ // then create an "invisible" frame: it has minimal size, is positioned
+ // (hopefully) outside the screen and doesn't appear on the taskbar
+ winActive = new wxFrame
+ (
+ wxTheApp->GetTopWindow(),
+ -1,
+ _T(""),
+ wxPoint(32600, 32600),
+ wxSize(1, 1),
+ wxDEFAULT_FRAME_STYLE | wxFRAME_NO_TASKBAR
+ );
+ winActive->Show();
#endif // wxUSE_GUI
- while ( data->state )
- wxYield();
+ // wait until the child process terminates
+ while ( data->state )
+ {
+#if wxUSE_STREAMS
+ bufOut.Update();
+ bufErr.Update();
+#endif // wxUSE_STREAMS
+
+ // don't eat 100% of the CPU -- ugly but anything else requires
+ // real async IO which we don't have for the moment
+ ::Sleep(50);
+
+#if wxUSE_GUI
+ // repaint the GUI
+ wxYield();
+#else // !GUI
+ // dispatch the messages to the hidden window so that it could
+ // process the wxWM_PROC_TERMINATED notification
+ MSG msg;
+ ::PeekMessage(&msg, hwnd, 0, 0, PM_REMOVE);
+#endif // GUI/!GUI
+ }
#if wxUSE_GUI
- wxEnableTopLevelWindows(TRUE);
- wxEndBusyCursor();
+ }
+
+ // finally delete the dummy frame and, as wd has been already destroyed and
+ // the other windows reenabled, the activation is going to return to the
+ // window which had it before
+ winActive->Destroy();
#endif // wxUSE_GUI
DWORD dwExitCode = data->dwExitCode;
// return the exit code
return dwExitCode;
-#endif // 0/1
#else // Win16
long instanceID = WinExec((LPCSTR) WXSTRINGCAST command, SW_SHOW);
- if (instanceID < 32) return(0);
+ if (instanceID < 32)
+ return flags & wxEXEC_SYNC ? -1 : 0;
- if (sync) {
+ if ( flags & wxEXEC_SYNC )
+ {
int running;
- do {
+ do
+ {
wxYield();
running = GetModuleUsage((HINSTANCE)instanceID);
} while (running);
}
- return(instanceID);
+ return instanceID;
#endif // Win16/32
}
-long wxExecute(char **argv, bool sync, wxProcess *handler)
+long wxExecute(wxChar **argv, int flags, wxProcess *handler)
{
wxString command;
- while ( *argv != NULL )
+ for ( ;; )
{
- command << *argv++ << ' ';
- }
+ command += *argv++;
+ if ( !*argv )
+ break;
- command.RemoveLast();
-
- return wxExecute(command, sync, handler);
-}
-
-// ----------------------------------------------------------------------------
-// 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);
+ command += _T(' ');
+ }
- *x *= (iWidthMM * 100);
- *x /= iWidthPels;
- *y *= (iHeightMM * 100);
- *y /= iHeightPels;
+ return wxExecute(command, flags, handler);
}
-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);
-}
projects / wxWidgets.git / blobdiff