X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/d9317fd47263a9521466156d7bf0f7988000bf15..1a787c5dc89b1cb6a9ddb4ebef3ad2fb24b49c8c:/src/msw/utilsexc.cpp

diff --git a/src/msw/utilsexc.cpp b/src/msw/utilsexc.cpp
index 6df190c161..12a78c001a 100644
--- a/src/msw/utilsexc.cpp
+++ b/src/msw/utilsexc.cpp
@@ -74,6 +74,10 @@
 #endif
 #include <stdarg.h>
 
+#if wxUSE_IPC
+    #include "wx/dde.h"         // for WX_DDE hack in wxExecute
+#endif // wxUSE_IPC
+
 // ----------------------------------------------------------------------------
 // constants
 // ----------------------------------------------------------------------------
@@ -167,15 +171,91 @@ LRESULT APIENTRY _EXPORT wxExecuteWindowCbk(HWND hWnd, UINT message,
             // asynchronous execution - we should do the clean up
             delete data;
         }
-    }
 
-    return 0;
+        return 0;
+    }
+    else
+    {
+        return DefWindowProc(hWnd, message, wParam, lParam);
+    }
 }
-#endif
+#endif // Win32
 
-long wxExecute(const wxString& command, bool sync, wxProcess *handler)
+long wxExecute(const wxString& cmd, bool sync, wxProcess *handler)
 {
-    wxCHECK_MSG( !!command, 0, wxT("empty command in wxExecute") );
+    wxCHECK_MSG( !!cmd, 0, wxT("empty command in wxExecute") );
+
+    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
+    // returns the command which should be run to view/open/... a file of the
+    // 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
+    // case we execute just <command> and process the rest below
+    wxString ddeServer, ddeTopic, ddeCommand;
+    static const size_t lenDdePrefix = 7;   // strlen("WX_DDE:")
+    if ( cmd.Left(lenDdePrefix) == _T("WX_DDE#") )
+    {
+        const wxChar *p = cmd.c_str() + 7;
+        while ( *p && *p != _T('#') )
+        {
+            command += *p++;
+        }
+
+        if ( *p )
+        {
+            // skip '#'
+            p++;
+        }
+        else
+        {
+            wxFAIL_MSG(_T("invalid WX_DDE command in wxExecute"));
+        }
+
+        while ( *p && *p != _T('#') )
+        {
+            ddeServer += *p++;
+        }
+
+        if ( *p )
+        {
+            // skip '#'
+            p++;
+        }
+        else
+        {
+            wxFAIL_MSG(_T("invalid WX_DDE command in wxExecute"));
+        }
+
+        while ( *p && *p != _T('#') )
+        {
+            ddeTopic += *p++;
+        }
+
+        if ( *p )
+        {
+            // skip '#'
+            p++;
+        }
+        else
+        {
+            wxFAIL_MSG(_T("invalid WX_DDE command in wxExecute"));
+        }
+
+        while ( *p )
+        {
+            ddeCommand += *p++;
+        }
+    }
+    else
+#endif // wxUSE_IPC
+    {
+        // no DDE
+        command = cmd;
+    }
 
 #if defined(__WIN32__) && !defined(__TWIN32__)
     // the old code is disabled because we really need a process handle
@@ -233,6 +313,7 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler)
 
     return result;
 #else // 1
+
     // create the process
     STARTUPINFO si;
     wxZeroMemory(si);
@@ -247,7 +328,8 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler)
                          NULL,       // security attributes: defaults for both
                          NULL,       //   the process and its main thread
                          FALSE,      // don't inherit handles
-                         CREATE_DEFAULT_ERROR_MODE,  // flags
+                         CREATE_DEFAULT_ERROR_MODE |
+                         CREATE_SUSPENDED,           // flags
                          NULL,       // environment (use the same)
                          NULL,       // current directory (use the same)
                          &si,        // startup info (unused here)
@@ -259,10 +341,7 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler)
         return 0;
     }
 
-    // close unneeded handle
-    if ( !::CloseHandle(pi.hThread) )
-        wxLogLastError("CloseHandle(hThread)");
-
+    // register the class for the hidden window used for the notifications
     if ( !gs_classForHiddenWindow )
     {
         gs_classForHiddenWindow = _T("wxHiddenWindow");
@@ -276,15 +355,14 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler)
         if ( !::RegisterClass(&wndclass) )
         {
             wxLogLastError("RegisterClass(hidden window)");
-
-            return FALSE;
         }
     }
 
     // create a hidden window to receive notification about process
     // termination
     HWND hwnd = ::CreateWindow(gs_classForHiddenWindow, NULL,
-                               0, 0, 0, 0, 0, NULL,
+                               WS_OVERLAPPEDWINDOW,
+                               0, 0, 0, 0, NULL,
                                (HMENU)NULL, wxGetInstance(), 0);
     wxASSERT_MSG( hwnd, wxT("can't create a hidden window for wxExecute") );
 
@@ -314,6 +392,18 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler)
                                     0,
                                     &tid);
 
+    // resume process we created now - whether the thread creation succeeded or
+    // not
+    if ( ::ResumeThread(pi.hThread) == (DWORD)-1 )
+    {
+        // ignore it - what can we do?
+        wxLogLastError("ResumeThread in wxExecute");
+    }
+
+    // close unneeded handle
+    if ( !::CloseHandle(pi.hThread) )
+        wxLogLastError("CloseHandle(hThread)");
+
     if ( !hThread )
     {
         wxLogLastError("CreateThread in wxExecute");
@@ -325,6 +415,22 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler)
         return pi.dwProcessId;
     }
 
+#if wxUSE_IPC
+    // second part of DDE hack: now establish the DDE conversation with the
+    // just launched process
+    if ( !!ddeServer )
+    {
+        wxDDEClient client;
+        wxConnectionBase *conn = client.MakeConnection(_T(""),
+                                                       ddeServer,
+                                                       ddeTopic);
+        if ( !conn || !conn->Execute(ddeCommand) )
+        {
+            wxLogError(_("Couldn't launch DDE server '%s'."), command.c_str());
+        }
+    }
+#endif // wxUSE_IPC
+
     if ( !sync )
     {
         // clean up will be done when the process terminates
@@ -333,10 +439,20 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler)
         return pi.dwProcessId;
     }
 
-    // waiting until command executed
+    // waiting until command executed (disable everything while doing it)
+#if wxUSE_GUI
+    wxBeginBusyCursor();
+    wxEnableTopLevelWindows(FALSE);
+#endif // wxUSE_GUI
+
     while ( data->state )
         wxYield();
 
+#if wxUSE_GUI
+    wxEnableTopLevelWindows(TRUE);
+    wxEndBusyCursor();
+#endif // wxUSE_GUI
+
     DWORD dwExitCode = data->dwExitCode;
     delete data;