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 5ec21ae5741f746c497490253b71410ac9edd69e..13c3f2e55c53af2c4493720447566e850146a219 100644 (file)
--- a/src/common/ipcbase.cpp
+++ b/src/common/ipcbase.cpp
@@ -1,33 +1,130 @@
 /////////////////////////////////////////////////////////////////////////////
-// 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 and Markus Holzem
-// Licence:    wxWindows license
+// Copyright:   (c) Julian Smart
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
-#pragma implementation "ipcbase.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #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(void *buffer, size_t bytes)
+    : m_buffer((char *)buffer),
+      m_buffersize(bytes),
+      m_deletebufferwhendone(false),
+      m_connected(true)
+{
+  if ( buffer == NULL )
+  { // behave like next constructor
+    m_buffersize = 0;
+    m_deletebufferwhendone = true;
+  }
+}
+
+wxConnectionBase::wxConnectionBase()
+    : m_buffer(NULL),
+      m_buffersize(0),
+      m_deletebufferwhendone(true),
+      m_connected(true)
+{
+}
+
+wxConnectionBase::wxConnectionBase(const wxConnectionBase& copy)
+    : wxObject(),
+      m_buffer(copy.m_buffer),
+      m_buffersize(copy.m_buffersize),
+      m_deletebufferwhendone(false),
+      m_connected(copy.m_connected)
+
+{
+  // copy constructor would require ref-counted pointer to buffer
+  wxFAIL_MSG( wxT("Copy constructor of wxConnectionBase not implemented") );
+}
+
+
+wxConnectionBase::~wxConnectionBase()
+{
+  if ( m_deletebufferwhendone )
+    delete [] m_buffer;
+}
+
+/* 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;
+  else
+  {  // need to resize buffer
+    if ( m_deletebufferwhendone )
+    { // we're in charge of buffer, increase it
+      delete [] m_buffer;
+      m_buffer = new char[bytes];
+      m_buffersize = bytes;
+      return m_buffer;
+    } // user-supplied buffer, fail
+    else
+      return NULL;
+  }
+}