]> git.saurik.com Git - wxWidgets.git/blobdiff - src/msw/utilsexc.cpp
1. added range checks in wxGridStringTable
[wxWidgets.git] / src / msw / utilsexc.cpp
index 9d778c9d5b67475fa7d9922d1b88a9fc3ffe9eb9..411eaeaf44c33cfcc8d4ee1229b8b1561502fffb 100644 (file)
@@ -37,6 +37,7 @@
 #include "wx/log.h"
 
 #ifdef __WIN32__
+    #include "wx/stream.h"
     #include "wx/process.h"
 #endif
 
 #endif
 #include <stdarg.h>
 
+#if wxUSE_IPC
+    #include "wx/dde.h"         // for WX_DDE hack in wxExecute
+#endif // wxUSE_IPC
+
 // ----------------------------------------------------------------------------
 // constants
 // ----------------------------------------------------------------------------
@@ -116,6 +121,94 @@ public:
     bool       state;         // set to FALSE when the process finishes
 };
 
+
+#ifdef __WIN32__
+// ----------------------------------------------------------------------------
+// wxPipeStreams
+// ----------------------------------------------------------------------------
+
+class wxPipeInputStream: public wxInputStream {
+public:
+    wxPipeInputStream(HANDLE hInput);
+    ~wxPipeInputStream();
+
+protected:
+    size_t OnSysRead(void *buffer, size_t len);
+
+protected:
+    HANDLE m_hInput;
+};
+
+class wxPipeOutputStream: public wxOutputStream {
+public:
+    wxPipeOutputStream(HANDLE hOutput);
+    ~wxPipeOutputStream();
+
+protected:
+    size_t OnSysWrite(const void *buffer, size_t len);
+
+protected:
+    HANDLE m_hOutput;
+};
+
+// ==================
+// wxPipeInputStream
+// ==================
+
+wxPipeInputStream::wxPipeInputStream(HANDLE hInput)
+{
+    m_hInput = hInput;
+}   
+
+wxPipeInputStream::~wxPipeInputStream()
+{
+    ::CloseHandle(m_hInput);
+}
+
+size_t wxPipeInputStream::OnSysRead(void *buffer, size_t len)
+{
+    DWORD bytesRead;
+
+    m_lasterror = wxSTREAM_NOERROR;
+    if (! ::ReadFile(m_hInput, buffer, len, &bytesRead, NULL) ) {
+        if (GetLastError() == ERROR_BROKEN_PIPE)
+            m_lasterror = wxSTREAM_EOF;
+        else
+            m_lasterror = wxSTREAM_READ_ERROR;
+    }
+    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 bytesRead;
+
+    m_lasterror = wxSTREAM_NOERROR;
+    if (! ::WriteFile(m_hOutput, buffer, len, &bytesRead, NULL) ) {
+        if (GetLastError() == ERROR_BROKEN_PIPE)
+            m_lasterror = wxSTREAM_EOF;
+        else
+            m_lasterror = wxSTREAM_READ_ERROR;
+    }
+    return bytesRead;
+}
+
+#endif // __WIN32__
+
 // ============================================================================
 // implementation
 // ============================================================================
@@ -167,15 +260,91 @@ 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
@@ -209,7 +378,6 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler)
         // only reached for space not inside quotes
         break;
     }
-
     wxString commandArgs = pc;
 
     wxWindow *winTop = wxTheApp->GetTopWindow();
@@ -233,6 +401,47 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler)
 
     return result;
 #else // 1
+                     
+    HANDLE h_readPipe[2];
+    HANDLE h_writePipe[2];
+    HANDLE h_oldreadPipe;
+    HANDLE h_oldwritePipe;
+    BOOL inheritHandles;
+
+    // ------------------------------------
+    // Pipe handling
+    // We are in the case of opening a pipe
+    inheritHandles = FALSE;
+    if (handler && handler->NeedPipe()) {
+        SECURITY_ATTRIBUTES security;
+
+        security.nLength              = sizeof(security);
+        security.lpSecurityDescriptor = NULL;
+        security.bInheritHandle       = TRUE;
+
+        if (! ::CreatePipe(&h_readPipe[0], &h_readPipe[1], &security, 0) ) {
+            wxLogSysError(_T("Can't create the inter-process read pipe"));
+
+            return 0;
+        }
+
+        if (! ::CreatePipe(&h_writePipe[0], &h_writePipe[1], &security, 0) ) {
+            wxLogSysError(_T("Can't create the inter-process read pipe"));
+
+            return 0;
+        }
+
+        // We need to save the old stdio handles to restore them after the call
+        // to CreateProcess
+        h_oldreadPipe  = GetStdHandle(STD_INPUT_HANDLE);
+        h_oldwritePipe = GetStdHandle(STD_OUTPUT_HANDLE);
+
+        SetStdHandle(STD_INPUT_HANDLE, h_readPipe[0]);
+        SetStdHandle(STD_OUTPUT_HANDLE, h_writePipe[1]);
+
+        inheritHandles = TRUE;
+    }
+
     // create the process
     STARTUPINFO si;
     wxZeroMemory(si);
@@ -246,23 +455,41 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler)
                          (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,  // flags
+                         inheritHandles,      // inherit handles if we need pipes
+                         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 (inheritHandles) {
+            ::CloseHandle(h_writePipe[0]);
+            ::CloseHandle(h_writePipe[1]);
+            ::CloseHandle(h_readPipe[0]);
+            ::CloseHandle(h_readPipe[1]);
+        }
         wxLogSysError(_("Execution of command '%s' failed"), command.c_str());
 
         return 0;
     }
 
-    // close unneeded handle
-    if ( !::CloseHandle(pi.hThread) )
-        wxLogLastError("CloseHandle(hThread)");
+    // Restore the old stdio handles
+    if (inheritHandles) {
+        SetStdHandle(STD_INPUT_HANDLE, h_oldreadPipe);
+        SetStdHandle(STD_OUTPUT_HANDLE, h_oldwritePipe);
+
+        ::CloseHandle(h_writePipe[1]);
+        ::CloseHandle(h_readPipe[0]);
+        // We can now initialize the wxStreams
+        wxInputStream *processOutput = new wxPipeInputStream(h_writePipe[0]);
+        wxOutputStream *processInput = new wxPipeOutputStream(h_readPipe[1]);
+
+        handler->SetPipeStreams(processOutput, processInput);
+    }
 
+    // register the class for the hidden window used for the notifications
     if ( !gs_classForHiddenWindow )
     {
         gs_classForHiddenWindow = _T("wxHiddenWindow");
@@ -276,15 +503,14 @@ 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 +540,18 @@ 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 +563,22 @@ 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 +587,20 @@ 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;
 
@@ -373,3 +637,36 @@ long wxExecute(char **argv, bool sync, wxProcess *handler)
     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);
+
+    *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);
+}