Return NULL from wxWindow::GetCapture() when the capture is being lost.

[wxWidgets.git] / src / common / ipcbase.cpp

diff --git a/src/common/ipcbase.cpp b/src/common/ipcbase.cpp
index 1322e26285e3818c170b98d05e3bd49bcca69887..13c3f2e55c53af2c4493720447566e850146a219 100644 (file)
--- a/src/common/ipcbase.cpp
+++ b/src/common/ipcbase.cpp
@@ -1,10 +1,9 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        ipcbase.cpp
+// Name:        src/common/ipcbase.cpp
 // Purpose:     IPC base classes
 // Author:      Julian Smart
 // Modified by:
 // Created:     04/01/98
-// RCS-ID:      $Id$
 // Copyright:   (c) Julian Smart
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
@@ -13,26 +12,25 @@
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
-#pragma hdrstop
+    #pragma hdrstop
 #endif
 
 #ifndef WX_PRECOMP
-#include "wx/defs.h"
 #endif
 
 #include "wx/ipcbase.h"
 
-IMPLEMENT_CLASS(wxServerBase, wxObject)
-IMPLEMENT_CLASS(wxClientBase, wxObject)
-IMPLEMENT_CLASS(wxConnectionBase, wxObject)
+wxIMPLEMENT_ABSTRACT_CLASS(wxServerBase, wxObject)
+wxIMPLEMENT_ABSTRACT_CLASS(wxClientBase, wxObject)
+wxIMPLEMENT_ABSTRACT_CLASS(wxConnectionBase, wxObject)
 
-wxConnectionBase::wxConnectionBase(wxChar *buffer, int bytes)
-    : m_connected(true),
-      m_buffer(buffer),
+wxConnectionBase::wxConnectionBase(void *buffer, size_t bytes)
+    : m_buffer((char *)buffer),
       m_buffersize(bytes),
-      m_deletebufferwhendone(false)
+      m_deletebufferwhendone(false),
+      m_connected(true)
 {
-  if ( buffer == (wxChar *)NULL )
+  if ( buffer == NULL )
   { // behave like next constructor
     m_buffersize = 0;
     m_deletebufferwhendone = true;
@@ -40,33 +38,80 @@ wxConnectionBase::wxConnectionBase(wxChar *buffer, int bytes)
 }
 
 wxConnectionBase::wxConnectionBase()
-    : m_connected(true),
-      m_buffer(NULL),
+    : m_buffer(NULL),
       m_buffersize(0),
-      m_deletebufferwhendone(true)
+      m_deletebufferwhendone(true),
+      m_connected(true)
 {
 }
 
-wxConnectionBase::wxConnectionBase(wxConnectionBase& copy)
+wxConnectionBase::wxConnectionBase(const wxConnectionBase& copy)
     : wxObject(),
-      m_connected(copy.m_connected),
       m_buffer(copy.m_buffer),
       m_buffersize(copy.m_buffersize),
-      m_deletebufferwhendone(false)
+      m_deletebufferwhendone(false),
+      m_connected(copy.m_connected)
 
 {
   // copy constructor would require ref-counted pointer to buffer
-  wxFAIL_MSG( _T("Copy constructor of wxConnectionBase not implemented") );
+  wxFAIL_MSG( wxT("Copy constructor of wxConnectionBase not implemented") );
 }
 
 
-wxConnectionBase::~wxConnectionBase(void)
+wxConnectionBase::~wxConnectionBase()
 {
-  if ( m_deletebufferwhendone && m_buffer )
-   delete m_buffer;
+  if ( m_deletebufferwhendone )
+    delete [] m_buffer;
 }
 
-wxChar *wxConnectionBase::GetBufferAtLeast( size_t bytes )
+/* static */
+wxString wxConnectionBase::GetTextFromData(const void* data,
+                                           size_t size,
+                                           wxIPCFormat fmt)
+{
+    wxString s;
+    switch ( fmt )
+    {
+        case wxIPC_TEXT:
+            // normally the string should be NUL-terminated and size should
+            // include the total size of the buffer, including NUL -- but don't
+            // crash (by trying to access (size_t)-1 bytes) if it doesn't
+            if ( size )
+                size--;
+
+            s = wxString(static_cast<const char *>(data), size);
+            break;
+
+#if wxUSE_UNICODE
+        // TODO: we should handle both wxIPC_UTF16TEXT and wxIPC_UTF32TEXT here
+        //       for inter-platform IPC
+        case wxIPC_UNICODETEXT:
+            wxASSERT_MSG( !(size % sizeof(wchar_t)), "invalid buffer size" );
+            if ( size )
+            {
+                size /= sizeof(wchar_t);
+                size--;
+            }
+
+            s = wxString(static_cast<const wchar_t *>(data), size);
+            break;
+
+        case wxIPC_UTF8TEXT:
+            if ( size )
+                size--;
+
+            s = wxString::FromUTF8(static_cast<const char *>(data), size);
+            break;
+#endif // wxUSE_UNICODE
+
+        default:
+            wxFAIL_MSG( "non-string IPC format in GetTextFromData()" );
+    }
+
+    return s;
+}
+
+void *wxConnectionBase::GetBufferAtLeast( size_t bytes )
 {
   if ( m_buffersize >= bytes )
     return m_buffer;
@@ -74,12 +119,8 @@ wxChar *wxConnectionBase::GetBufferAtLeast( size_t bytes )
   {  // need to resize buffer
     if ( m_deletebufferwhendone )
     { // we're in charge of buffer, increase it
-      if ( m_buffer )
-        delete m_buffer;
-      // the argument specifies **byte size**, but m_buffer is of type
-      // wxChar. Under unicode: sizeof(wxChar) > 1, so the buffer size is
-      // bytes / sizeof(wxChar) rounded upwards.
-      m_buffer = new wxChar[(bytes + sizeof(wxChar) - 1) / sizeof(wxChar)];
+      delete [] m_buffer;
+      m_buffer = new char[bytes];
       m_buffersize = bytes;
       return m_buffer;
     } // user-supplied buffer, fail
@@ -87,4 +128,3 @@ wxChar *wxConnectionBase::GetBufferAtLeast( size_t bytes )
       return NULL;
   }
 }
-