added wxTextBuffer and wxMemoryText which allow to use wxTextFile with in-memory data

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@12424 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/memtext.h

@@ -0,0 +1,51 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/memtext.h
+// Purpose:     wxMemoryText allows to use wxTextBuffer without a file
+// Created:     14.11.01
+// Author:      Morten Hanssen
+// Copyright:   (c) 2001 wxWindows team
+// Licence:     wxWindows license
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_MEMTEXT_H
+#define _WX_MEMTEXT_H
+
+#include "wx/defs.h"
+
+// there is no separate setting for wxMemoryText, it's smallish anyhow
+#if wxUSE_TEXTBUFFER
+
+// ----------------------------------------------------------------------------
+// wxMemoryText
+// ----------------------------------------------------------------------------
+
+class wxMemoryText : public wxTextBuffer
+{
+public:
+    // Constructors.
+    wxMemoryText() { }
+    wxMemoryText(const wxString& name) : wxTextBuffer(name) { }
+
+protected:
+    virtual bool OnExists() const
+        { return false; }
+
+    virtual bool OnOpen(const wxString &strBufferName,
+                        wxTextBufferOpenMode OpenMode)
+        { return true; }
+
+    virtual bool OnClose()
+        { return true; }
+
+    virtual bool OnRead(wxMBConv& conv)
+        { return true; }
+
+    virtual bool OnWrite(wxTextFileType typeNew,
+                         wxMBConv& conv = wxConvLibc)
+        { return true; }
+};
+
+#endif // wxUSE_TEXTBUFFER
+
+#endif // _WX_MEMTEXT_H
+