[wxWidgets.git] / src / mac / carbon / textctrl.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        textctrl.cpp
// Purpose:     wxTextCtrl
// Author:      Stefan Csomor
// Modified by: Ryan Norton (MLTE GetLineLength and GetLineText)
// Created:     1998-01-01
// RCS-ID:      $Id$
// Copyright:   (c) Stefan Csomor
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "textctrl.h"
#endif

#include "wx/wxprec.h"

#if wxUSE_TEXTCTRL


#ifdef __DARWIN__
  #include <sys/types.h>
  #include <sys/stat.h>
#else
  #include <stat.h>
#endif

#include "wx/msgdlg.h"

#if wxUSE_STD_IOSTREAM
    #if wxUSE_IOSTREAMH
        #include <fstream.h>
    #else
        #include <fstream>
    #endif
#endif

#include "wx/app.h"
#include "wx/dc.h"
#include "wx/button.h"
#include "wx/toplevel.h"
#include "wx/textctrl.h"
#include "wx/notebook.h"
#include "wx/tabctrl.h"
#include "wx/settings.h"
#include "wx/filefn.h"
#include "wx/utils.h"

#if defined(__BORLANDC__) && !defined(__WIN32__)
  #include <alloc.h>
#elif !defined(__MWERKS__) && !defined(__GNUWIN32) && !defined(__DARWIN__)
  #include <malloc.h>
#endif

#ifndef __DARWIN__
#include <Scrap.h>
#endif

// if this is set to 1 then under OSX 10.2 the 'classic' MLTE implementation will be used
// if set to 0 then the unicode textctrl will be used
#ifndef wxMAC_AWAYS_USE_MLTE
#define wxMAC_AWAYS_USE_MLTE 1
#endif

#ifndef __WXMAC_OSX__
enum 
{
    kTXNVisibilityTag             = 'visb' /*set the visibility state of the object  */
};
#endif

#include <MacTextEditor.h>
#include <ATSUnicode.h>
#include <TextCommon.h>
#include <TextEncodingConverter.h>
#include "wx/mac/uma.h"

class wxMacFunctor
{
public :
    wxMacFunctor(){}
    virtual ~wxMacFunctor() {}
    virtual void* operator()() = 0 ;
    static void* CallBackProc(void *param)
    {
        wxMacFunctor* f = (wxMacFunctor*) param ;
        void *result = (*f)() ;
        return result ;
    }
} ;

template<typename classtype,typename param1type>
class wxMacObjectFunctor1 : public wxMacFunctor
{
    typedef void (classtype::*function)( param1type p1 ) ;
    typedef void (classtype::*ref_function)( const param1type& p1 ) ;
public :
    wxMacObjectFunctor1( classtype *obj , function f , param1type p1 ) :
        wxMacFunctor(  )
    {
        m_object = obj ;
        m_function = f ;
        m_param1 = p1 ;
    }

    wxMacObjectFunctor1( classtype *obj , ref_function f , param1type p1 ) :
        wxMacFunctor(  )
    {
        m_object = obj ;
        m_refFunction = f ;
        m_param1 = p1 ;
    }

    ~wxMacObjectFunctor1() {}

    virtual void* operator()()
    {
        (m_object->*m_function)(m_param1) ;
        return NULL ;
    }
private :
    classtype* m_object ;
    param1type m_param1 ;
    union
    {
    function m_function ;
    ref_function m_refFunction ;
    } ;
} ;

template<typename classtype, typename param1type>
void* wxMacMPRemoteCall( classtype *object , void (classtype::*function)( param1type p1 ) , param1type p1 )
{
    wxMacObjectFunctor1<classtype,param1type> params(object,function,p1) ;
    void *result =
        MPRemoteCall( wxMacFunctor::CallBackProc , &params  , kMPOwningProcessRemoteContext ) ;
    return result ;
}

template<typename classtype, typename param1type>
void* wxMacMPRemoteCall( classtype *object , void (classtype::*function)( const param1type& p1 ) , param1type p1 )
{
    wxMacObjectFunctor1<classtype,param1type> params(object,function,p1) ;
    void *result =
        MPRemoteCall( wxMacFunctor::CallBackProc , &params  , kMPOwningProcessRemoteContext ) ;
    return result ;
}

template<typename classtype, typename param1type>
void* wxMacMPRemoteGUICall( classtype *object , void (classtype::*function)( param1type p1 ) , param1type p1 )
{
    wxMutexGuiLeave() ;
    void *result = wxMacMPRemoteCall( object , function , p1 ) ;
    wxMutexGuiEnter() ;
    return result ;
}

template<typename classtype, typename param1type>
void* wxMacMPRemoteGUICall( classtype *object , void (classtype::*function)( const param1type& p1 ) , param1type p1 )
{
    wxMutexGuiLeave() ;
    void *result = wxMacMPRemoteCall( object , function , p1 ) ;
    wxMutexGuiEnter() ;
    return result ;
}
// common interface for all implementations
class wxMacTextControl : public wxMacControl
{
public :
    wxMacTextControl( wxTextCtrl *peer ) ;
    ~wxMacTextControl() ;

    virtual wxString GetStringValue() const = 0 ;
    virtual void SetStringValue( const wxString &val ) = 0 ;
    virtual void SetStyle(long start, long end, const wxTextAttr& style) ;
    virtual void Copy() ;
    virtual void Cut() ;
    virtual void Paste() ;
    virtual bool CanPaste() const ;
    virtual void SetEditable(bool editable) ;
    virtual wxTextPos GetLastPosition() const ;
    virtual void Replace( long from , long to , const wxString str ) ;
    virtual void Remove( long from , long to ) = 0 ;
    virtual void SetSelection( long from , long to ) = 0 ;
    virtual void GetSelection( long* from, long* to) const = 0 ;
    virtual void WriteText(const wxString& str) = 0 ;

    virtual void Clear() ;
    virtual bool CanUndo() const;
    virtual void Undo() ;
    virtual bool CanRedo() const;
    virtual void Redo() ;
    virtual int GetNumberOfLines() const ;
    virtual long XYToPosition(long x, long y) const;
    virtual bool PositionToXY(long pos, long *x, long *y) const ;
    virtual void ShowPosition( long WXUNUSED(pos) ) ;
    virtual int GetLineLength(long lineNo) const ;
    virtual wxString GetLineText(long lineNo) const ;
    virtual bool SetupCursor( const wxPoint& pt ) { return false ; }

#ifndef __WXMAC_OSX__
    virtual void            MacControlUserPaneDrawProc(wxInt16 part) = 0 ;
    virtual wxInt16         MacControlUserPaneHitTestProc(wxInt16 x, wxInt16 y) = 0 ;
    virtual wxInt16         MacControlUserPaneTrackingProc(wxInt16 x, wxInt16 y, void* actionProc) = 0 ;
    virtual void            MacControlUserPaneIdleProc() = 0 ;
    virtual wxInt16         MacControlUserPaneKeyDownProc(wxInt16 keyCode, wxInt16 charCode, wxInt16 modifiers) = 0 ;
    virtual void            MacControlUserPaneActivateProc(bool activating) = 0 ;
    virtual wxInt16         MacControlUserPaneFocusProc(wxInt16 action) = 0 ;
    virtual void            MacControlUserPaneBackgroundProc(void* info) = 0 ;
#endif
} ;

// common parts for implementations based on MLTE

class wxMacMLTEControl : public wxMacTextControl
{
public :
    wxMacMLTEControl( wxTextCtrl *peer ) ;
    virtual wxString GetStringValue() const ;
    virtual void SetStringValue( const wxString &str) ;

    static TXNFrameOptions FrameOptionsFromWXStyle( long wxStyle ) ;
    void    AdjustCreationAttributes( const wxColour& background , bool visible ) ;

    virtual void SetFont( const wxFont & font , const wxColour& foreground , long windowStyle ) ;
    virtual void SetBackground( const wxBrush &brush) ;
    virtual void SetStyle(long start, long end, const wxTextAttr& style) ;
    virtual void Copy() ;
    virtual void Cut() ;
    virtual void Paste() ;
    virtual bool CanPaste() const ;
    virtual void SetEditable(bool editable) ;
    virtual wxTextPos GetLastPosition() const ;
    virtual void Replace( long from , long to , const wxString str ) ;
    virtual void Remove( long from , long to )  ;
    virtual void GetSelection( long* from, long* to) const ;
    virtual void SetSelection( long from , long to ) ;

    virtual void WriteText(const wxString& str) ;
    virtual void Clear() ;

    virtual bool CanUndo() const ;
    virtual void Undo() ;
    virtual bool CanRedo()  const;
    virtual void Redo() ;
    virtual int GetNumberOfLines() const ;
    virtual long XYToPosition(long x, long y) const ;
    virtual bool PositionToXY(long pos, long *x, long *y) const ;
    virtual void ShowPosition( long pos ) ;
    virtual int GetLineLength(long lineNo) const ;
    virtual wxString GetLineText(long lineNo) const ;

    void SetTXNData( const wxString& st , TXNOffset start , TXNOffset end ) ;

protected :
    void TXNSetAttribute( const wxTextAttr& style , long from , long to ) ;
    TXNObject m_txn ;
} ;

#if TARGET_API_MAC_OSX

// implementation available under OSX

#if MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_2

class wxMacMLTEHIViewControl : public wxMacMLTEControl
{
public :
    wxMacMLTEHIViewControl( wxTextCtrl *wxPeer,
                             const wxString& str,
                             const wxPoint& pos,
                             const wxSize& size, long style ) ;
    virtual OSStatus SetFocus( ControlFocusPart focusPart ) ;
    virtual bool HasFocus() const ;
protected :
    HIViewRef m_scrollView ;
    HIViewRef m_textView ;
} ;

#endif

class wxMacUnicodeTextControl : public wxMacTextControl
{
public :
    wxMacUnicodeTextControl( wxTextCtrl *wxPeer,
                             const wxString& str,
                             const wxPoint& pos,
                             const wxSize& size, long style ) ;
    ~wxMacUnicodeTextControl();
    virtual void VisibilityChanged(bool shown);
    virtual wxString GetStringValue() const ;
    virtual void SetStringValue( const wxString &str) ;
    virtual void Copy();
    virtual void Cut();
    virtual void Paste();
    virtual bool CanPaste() const;
    virtual void SetEditable(bool editable) ;
    virtual void Remove( long from , long to ) ;
    virtual void GetSelection( long* from, long* to) const ;
    virtual void SetSelection( long from , long to ) ;
    virtual void WriteText(const wxString& str) ;
protected :
    // contains the tag for the content (is different for password and non-password controls)
    OSType m_valueTag ;
} ;

#endif

// 'classic' MLTE implementation

class wxMacMLTEClassicControl : public wxMacMLTEControl
{
public :
    wxMacMLTEClassicControl( wxTextCtrl *wxPeer,
                             const wxString& str,
                             const wxPoint& pos,
                             const wxSize& size, long style ) ;
    ~wxMacMLTEClassicControl() ;
    virtual void VisibilityChanged(bool shown) ;
    virtual void SuperChangedPosition() ;

    virtual void            MacControlUserPaneDrawProc(wxInt16 part) ;
    virtual wxInt16         MacControlUserPaneHitTestProc(wxInt16 x, wxInt16 y) ;
    virtual wxInt16         MacControlUserPaneTrackingProc(wxInt16 x, wxInt16 y, void* actionProc) ;
    virtual void            MacControlUserPaneIdleProc() ;
    virtual wxInt16         MacControlUserPaneKeyDownProc(wxInt16 keyCode, wxInt16 charCode, wxInt16 modifiers) ;
    virtual void            MacControlUserPaneActivateProc(bool activating) ;
    virtual wxInt16         MacControlUserPaneFocusProc(wxInt16 action) ;
    virtual void            MacControlUserPaneBackgroundProc(void* info) ;

    virtual bool            SetupCursor( const wxPoint& WXUNUSED(pt) ) { MacControlUserPaneIdleProc() ; return true ;}

    virtual void            SetRect( Rect *r ) ;

protected :
    OSStatus                 DoCreate();
    
    void                    MacUpdatePosition() ;
    void                    MacActivatePaneText(Boolean setActive) ;
    void                    MacFocusPaneText(Boolean setFocus) ;

    void                    MacSetObjectVisibility(Boolean vis) ;
private :
    TXNFrameID              m_txnFrameID ;
    GrafPtr                 m_txnPort ;
    WindowRef               m_txnWindow ;
    // bounds of the control as we last did set the txn frames
    Rect                    m_txnControlBounds ;

#ifdef __WXMAC_OSX__
    static pascal void      TXNScrollInfoProc (SInt32 iValue, SInt32 iMaximumValue, 
                                TXNScrollBarOrientation iScrollBarOrientation, SInt32 iRefCon) ;
    static pascal void      TXNScrollActionProc( ControlRef controlRef , ControlPartCode partCode ) ;
    ControlRef              m_sbHorizontal ;
    SInt32                  m_lastHorizontalValue ;
    ControlRef              m_sbVertical ;
    SInt32                  m_lastVerticalValue ;
#endif
} ;

#define TE_UNLIMITED_LENGTH 0xFFFFFFFFUL

#if !USE_SHARED_LIBRARY
IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)

BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
    EVT_ERASE_BACKGROUND( wxTextCtrl::OnEraseBackground )
    EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
    EVT_CHAR(wxTextCtrl::OnChar)
    EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
    EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
    EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
    EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
    EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)

    EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
    EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
    EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
    EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
    EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
END_EVENT_TABLE()
#endif

// Text item
void wxTextCtrl::Init()
{
  m_editable = true ;
  m_dirty = false;

  m_maxLength = TE_UNLIMITED_LENGTH ;
}

wxTextCtrl::~wxTextCtrl()
{
}


bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
           const wxString& str,
           const wxPoint& pos,
           const wxSize& size, long style,
           const wxValidator& validator,
           const wxString& name)
{
    m_macIsUserPane = false ;
    m_editable = true ;

    if ( ! ( style & wxNO_BORDER) )
        style = ( style & ~wxBORDER_MASK) | wxSUNKEN_BORDER ;

    if ( !wxTextCtrlBase::Create(parent, id, pos, size, style & ~(wxHSCROLL|wxVSCROLL), validator, name) )
        return false;

    if ( m_windowStyle & wxTE_MULTILINE )
    {
        wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
                      wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );

        m_windowStyle |= wxTE_PROCESS_ENTER;
        style |= wxTE_PROCESS_ENTER ;
    }

#ifdef __WXMAC_OSX__
#if MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_2
    if ( UMAGetSystemVersion() >= 0x1050 )
    {
        m_peer = new wxMacMLTEHIViewControl( this , str , pos , size , style ) ;
    }
#endif
#if !wxMAC_AWAYS_USE_MLTE
    if ( !m_peer )
    {
        m_peer = new wxMacUnicodeTextControl( this , str , pos , size , style ) ;
    }
#endif
#endif
    if ( !m_peer )
    {
        m_peer = new wxMacMLTEClassicControl( this , str , pos , size , style ) ;
    }

    MacPostControlCreate(pos,size) ;

    if ( m_windowStyle & wxTE_READONLY)
    {
        SetEditable( false ) ;
    }
    
    SetCursor( wxCursor( wxCURSOR_IBEAM ) ) ;

    return true;
}

void wxTextCtrl::MacSuperChangedPosition() 
{
    wxWindow::MacSuperChangedPosition() ;
    GetPeer()->SuperChangedPosition() ;
}

void wxTextCtrl::MacVisibilityChanged()
{
    GetPeer()->VisibilityChanged( MacIsReallyShown() ) ;
}

void wxTextCtrl::MacEnabledStateChanged()
{
}

wxString wxTextCtrl::GetValue() const
{
    return GetPeer()->GetStringValue() ;
}

void wxTextCtrl::GetSelection(long* from, long* to) const
{
    GetPeer()->GetSelection( from , to ) ;
}

void wxTextCtrl::SetValue(const wxString& str)
{
    // optimize redraws
    if ( GetValue() == str )
        return ;

    GetPeer()->SetStringValue(str) ;

    wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
    event.SetString( GetValue() ) ;
    event.SetEventObject( this );
    GetEventHandler()->ProcessEvent(event);
}

void wxTextCtrl::SetMaxLength(unsigned long len)
{
    m_maxLength = len ;
}

bool wxTextCtrl::SetFont( const wxFont& font )
{
    if ( !wxTextCtrlBase::SetFont( font ) )
        return false ;

    GetPeer()->SetFont( font , GetForegroundColour() , GetWindowStyle() ) ;
    return true ;
}

bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
{
    GetPeer()->SetStyle( start , end , style ) ;
    return true ;
}

bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
{
    wxTextCtrlBase::SetDefaultStyle( style ) ;
    SetStyle( kTXNUseCurrentSelection , kTXNUseCurrentSelection , GetDefaultStyle() ) ;
    return true ;
}

// Clipboard operations
void wxTextCtrl::Copy()
{
    if (CanCopy())
    {
        GetPeer()->Copy() ;
    }
}

void wxTextCtrl::Cut()
{
    if (CanCut())
    {
        GetPeer()->Cut() ;

        wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
        event.SetEventObject( this );
        GetEventHandler()->ProcessEvent(event);
      }
}

void wxTextCtrl::Paste()
{
    if (CanPaste())
    {
        GetPeer()->Paste() ;
        // eventually we should add setting the default style again

        wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
        event.SetEventObject( this );
        GetEventHandler()->ProcessEvent(event);
    }
}

bool wxTextCtrl::CanCopy() const
{
    // Can copy if there's a selection
    long from, to;
    GetSelection(& from, & to);
    return (from != to);
}

bool wxTextCtrl::CanCut() const
{
    if ( !IsEditable() )
    {
        return false ;
    }
    // Can cut if there's a selection
    long from, to;
    GetSelection(& from, & to);
    return (from != to);
}

bool wxTextCtrl::CanPaste() const
{
    if (!IsEditable())
        return false;

    return GetPeer()->CanPaste() ;
}

void wxTextCtrl::SetEditable(bool editable)
{
    if ( editable != m_editable )
    {
        m_editable = editable ;
        GetPeer()->SetEditable( editable ) ;
    }
}

void wxTextCtrl::SetInsertionPoint(long pos)
{
    SetSelection( pos , pos ) ;
}

void wxTextCtrl::SetInsertionPointEnd()
{
    wxTextPos pos = GetLastPosition();
    SetInsertionPoint(pos);
}

long wxTextCtrl::GetInsertionPoint() const
{
    long begin,end ;
    GetSelection( &begin , &end ) ;
    return begin ;
}

wxTextPos wxTextCtrl::GetLastPosition() const
{
    return GetPeer()->GetLastPosition( ) ;
}

void wxTextCtrl::Replace(long from, long to, const wxString& str)
{
    GetPeer()->Replace( from , to , str) ;
}

void wxTextCtrl::Remove(long from, long to)
{
    GetPeer()->Remove( from , to ) ;
}

void wxTextCtrl::SetSelection(long from, long to)
{
    GetPeer()->SetSelection( from , to ) ;
}

bool wxTextCtrl::LoadFile(const wxString& file)
{
    if ( wxTextCtrlBase::LoadFile(file) )
    {
        return true;
    }

    return false;
}

void wxTextCtrl::WriteText(const wxString& str)
{
    // TODO this MPRemoting will be moved into a remoting peer proxy for any command
    if ( !wxIsMainThread() )
    {
        // unfortunately CW 8 is not able to correctly deduce the template types, so we have
        // to instantiate explicitely
        wxMacMPRemoteGUICall<wxTextCtrl,wxString>( this , &wxTextCtrl::WriteText , str ) ;
        return ;
    }
    else
    {
        GetPeer()->WriteText( str ) ;
    }
}

void wxTextCtrl::AppendText(const wxString& text)
{
    SetInsertionPointEnd();
    WriteText(text);
}

void wxTextCtrl::Clear()
{
    GetPeer()->Clear() ;
}

bool wxTextCtrl::IsModified() const
{
    return m_dirty;
}

bool wxTextCtrl::IsEditable() const
{
    return IsEnabled() && m_editable ;
}

bool wxTextCtrl::AcceptsFocus() const
{
    // we don't want focus if we can't be edited
    return /*IsEditable() && */ wxControl::AcceptsFocus();
}

wxSize wxTextCtrl::DoGetBestSize() const
{
    int wText = 100 ;

    int hText;

    // these are the numbers from the HIG, we reduce them by the borders
    // first

    switch( m_windowVariant )
    {
        case wxWINDOW_VARIANT_NORMAL :
            hText = 22 - 6 ;
            break ;
        case wxWINDOW_VARIANT_SMALL :
            hText = 19 - 6 ;
            break ;
        case wxWINDOW_VARIANT_MINI :
            hText= 15 - 6 ;
            break ;
        default :
            hText = 22 - 6;
            break ;
    }

    // as the above numbers have some free space around the text
    // we get 5 lines like this anyway
    if ( m_windowStyle & wxTE_MULTILINE )
    {
         hText *= 5 ;
    }

    if ( !HasFlag(wxNO_BORDER) )
        hText += 6 ;

    return wxSize(wText, hText);
}

// ----------------------------------------------------------------------------
// Undo/redo
// ----------------------------------------------------------------------------

void wxTextCtrl::Undo()
{
    if (CanUndo())
    {
        GetPeer()->Undo() ;
    }
}

void wxTextCtrl::Redo()
{
    if (CanRedo())
    {
        GetPeer()->Redo() ;
    }
}

bool wxTextCtrl::CanUndo() const
{
    if ( !IsEditable() )
    {
        return false ;
    }
    return GetPeer()->CanUndo() ;
}

bool wxTextCtrl::CanRedo() const
{
    if ( !IsEditable() )
    {
        return false ;
    }
    return GetPeer()->CanRedo() ;
}

void wxTextCtrl::MarkDirty()
{
    m_dirty = true;
}

void wxTextCtrl::DiscardEdits()
{
    m_dirty = false;
}

int wxTextCtrl::GetNumberOfLines() const
{
    return GetPeer()->GetNumberOfLines() ;
}

long wxTextCtrl::XYToPosition(long x, long y) const
{
    return GetPeer()->XYToPosition( x , y ) ;
}

bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
{
    return GetPeer()->PositionToXY(pos , x , y ) ;
}

void wxTextCtrl::ShowPosition(long pos)
{
    return GetPeer()->ShowPosition(pos) ;
}

int wxTextCtrl::GetLineLength(long lineNo) const
{
    return GetPeer()->GetLineLength(lineNo) ;
}

wxString wxTextCtrl::GetLineText(long lineNo) const
{
    return GetPeer()->GetLineText(lineNo) ;
}

/*
 * Text item
 */

void wxTextCtrl::Command(wxCommandEvent & event)
{
    SetValue (event.GetString());
    ProcessCommand (event);
}

void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
{
    // By default, load the first file into the text window.
    if (event.GetNumberOfFiles() > 0)
    {
        LoadFile(event.GetFiles()[0]);
    }
}

void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
{
    // all erasing should be done by the real mac control implementation
    // while this is true for MLTE under classic, the HITextView is somehow
    // transparent but background erase is not working correctly, so intercept
    // things while we can...
    event.Skip() ;
}

void wxTextCtrl::OnChar(wxKeyEvent& event)
{
    int key = event.GetKeyCode() ;
    bool eat_key = false ;

    if ( key == 'c' && event.MetaDown() )
    {
        if ( CanCopy() )
            Copy() ;
        return ;
    }

    if ( !IsEditable() && key != WXK_LEFT && key != WXK_RIGHT && key != WXK_DOWN && key != WXK_UP && key != WXK_TAB &&
        !( key == WXK_RETURN && ( (m_windowStyle & wxPROCESS_ENTER) || (m_windowStyle & wxTE_MULTILINE) ) )
/*        && key != WXK_PRIOR && key != WXK_NEXT && key != WXK_HOME && key != WXK_END */
        )
    {
        // eat it
        return ;
    }

    // Check if we have reached the max # of chars, but still allow navigation and deletion
    if ( !IsMultiLine() && GetValue().Length() >= m_maxLength &&
        key != WXK_LEFT && key != WXK_RIGHT && key != WXK_TAB &&
        key != WXK_BACK && !( key == WXK_RETURN && (m_windowStyle & wxPROCESS_ENTER) )
       )
    {
        // eat it, we don't want to add more than allowed # of characters
        return;
    }

    // assume that any key not processed yet is going to modify the control
    m_dirty = true;

    if ( key == 'v' && event.MetaDown() )
    {
        if ( CanPaste() )
            Paste() ;
        return ;
    }
    if ( key == 'x' && event.MetaDown() )
    {
        if ( CanCut() )
            Cut() ;
        return ;
    }
    switch ( key )
    {
        case WXK_RETURN:
            if (m_windowStyle & wxPROCESS_ENTER)
            {
                wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
                event.SetEventObject( this );
                event.SetString( GetValue() );
                if ( GetEventHandler()->ProcessEvent(event) )
                    return;
            }
            if ( !(m_windowStyle & wxTE_MULTILINE) )
            {
                wxWindow *parent = GetParent();
                while( parent && !parent->IsTopLevel() && parent->GetDefaultItem() == NULL ) {
                  parent = parent->GetParent() ;
                }
                if ( parent && parent->GetDefaultItem() )
                {
                    wxButton *def = wxDynamicCast(parent->GetDefaultItem(),
                                                          wxButton);
                    if ( def && def->IsEnabled() )
                    {
                        wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, def->GetId() );
                        event.SetEventObject(def);
                        def->Command(event);
                        return ;
                   }
                }

                // this will make wxWidgets eat the ENTER key so that
                // we actually prevent line wrapping in a single line
                // text control
                eat_key = true;
            }

            break;

        case WXK_TAB:
            if ( !(m_windowStyle & wxTE_PROCESS_TAB))
            {
                int flags = 0;
                if (!event.ShiftDown())
                    flags |= wxNavigationKeyEvent::IsForward ;
                if (event.ControlDown())
                    flags |= wxNavigationKeyEvent::WinChange ;
                Navigate(flags);
                return;
            }
            else
            {
                // This is necessary (don't know why) or the tab will not
                // be inserted.
                WriteText(wxT("\t"));
            }

            break;
    }

    if (!eat_key)
    {
        // perform keystroke handling
        if ( wxTheApp->MacGetCurrentEvent() != NULL && wxTheApp->MacGetCurrentEventHandlerCallRef() != NULL )
            CallNextEventHandler((EventHandlerCallRef)wxTheApp->MacGetCurrentEventHandlerCallRef() , (EventRef) wxTheApp->MacGetCurrentEvent() ) ;
        else
        {
            EventRecord rec ;
            if ( wxMacConvertEventToRecord(  (EventRef) wxTheApp->MacGetCurrentEvent() , &rec ) )
            {
                EventRecord *ev = &rec ;
                short keycode ;
                short keychar ;
                keychar = short(ev->message & charCodeMask);
                keycode = short(ev->message & keyCodeMask) >> 8 ;

                m_peer->HandleKey( keycode , keychar , ev->modifiers ) ;
            }
        }
    }
    if ( ( key >= 0x20 && key < WXK_START ) ||
         key == WXK_RETURN ||
         key == WXK_DELETE ||
         key == WXK_BACK)
    {
        wxCommandEvent event1(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
        event1.SetEventObject( this );
        wxPostEvent(GetEventHandler(),event1);
    }
}

// ----------------------------------------------------------------------------
// standard handlers for standard edit menu events
// ----------------------------------------------------------------------------

void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
{
    Cut();
}

void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
{
    Copy();
}

void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
{
    Paste();
}

void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
{
    Undo();
}

void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
{
    Redo();
}

void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
{
    event.Enable( CanCut() );
}

void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
{
    event.Enable( CanCopy() );
}

void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
{
    event.Enable( CanPaste() );
}

void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
{
    event.Enable( CanUndo() );
}

void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
{
    event.Enable( CanRedo() );
}

bool wxTextCtrl::MacSetupCursor( const wxPoint& pt )
{
    if ( !GetPeer()->SetupCursor(pt) )
        return wxWindow::MacSetupCursor( pt ) ;
    else
        return true ;
}
#if !TARGET_API_MAC_OSX

// user pane implementation

void wxTextCtrl::MacControlUserPaneDrawProc(wxInt16 part)
{
    GetPeer()->MacControlUserPaneDrawProc( part ) ;
}

wxInt16 wxTextCtrl::MacControlUserPaneHitTestProc(wxInt16 x, wxInt16 y)
{
    return GetPeer()->MacControlUserPaneHitTestProc( x , y ) ;
}

wxInt16 wxTextCtrl::MacControlUserPaneTrackingProc(wxInt16 x, wxInt16 y, void* actionProc)
{
    return GetPeer()->MacControlUserPaneTrackingProc( x , y , actionProc ) ;
}

void wxTextCtrl::MacControlUserPaneIdleProc()
{
    GetPeer()->MacControlUserPaneIdleProc( ) ;
}

wxInt16 wxTextCtrl::MacControlUserPaneKeyDownProc(wxInt16 keyCode, wxInt16 charCode, wxInt16 modifiers)
{
    return GetPeer()->MacControlUserPaneKeyDownProc( keyCode , charCode , modifiers ) ;
}

void wxTextCtrl::MacControlUserPaneActivateProc(bool activating)
{
    GetPeer()->MacControlUserPaneActivateProc( activating ) ;
}

wxInt16 wxTextCtrl::MacControlUserPaneFocusProc(wxInt16 action)
{
    return GetPeer()->MacControlUserPaneFocusProc( action ) ;
}

void wxTextCtrl::MacControlUserPaneBackgroundProc(void* info)
{
    GetPeer()->MacControlUserPaneBackgroundProc( info ) ;
}

#endif
// ----------------------------------------------------------------------------
// implementation base class
// ----------------------------------------------------------------------------

wxMacTextControl::wxMacTextControl(wxTextCtrl* peer) :
    wxMacControl( peer )
{
}

wxMacTextControl::~wxMacTextControl()
{
}

void wxMacTextControl::SetStyle(long start, long end, const wxTextAttr& style)
{
}

void wxMacTextControl::Copy()
{
}

void wxMacTextControl::Cut()
{
}

void wxMacTextControl::Paste()
{
}

bool wxMacTextControl::CanPaste() const
{
    return false ;
}

void wxMacTextControl::SetEditable(bool editable)
{
}

wxTextPos wxMacTextControl::GetLastPosition() const
{
    return GetStringValue().Length() ;
}

void wxMacTextControl::Replace( long from , long to , const wxString str )
{
}

void wxMacTextControl::Clear()
{
    SetStringValue( wxEmptyString ) ;
}

bool wxMacTextControl::CanUndo() const
{
    return false ;
}

void wxMacTextControl::Undo() { }

bool wxMacTextControl::CanRedo()  const
{
    return false ;
}

void wxMacTextControl::Redo()
{
}

long wxMacTextControl::XYToPosition(long x, long y) const
{
    return 0 ;
}

bool wxMacTextControl::PositionToXY(long pos, long *x, long *y) const
{
    return false ;
}

void wxMacTextControl::ShowPosition( long WXUNUSED(pos) )
{
}

int wxMacTextControl::GetNumberOfLines() const
{
    ItemCount lines = 0 ;
    wxString content = GetStringValue() ;
    lines = 1;
    for (size_t i = 0; i < content.Length() ; i++)
    {
        if (content[i] == '\r') lines++;
    }
    return lines ;
}

wxString wxMacTextControl::GetLineText(long lineNo) const
{
    // TODO change this if possible to reflect real lines
    wxString content = GetStringValue() ;

    // Find line first
    int count = 0;
    for (size_t i = 0; i < content.Length() ; i++)
    {
        if (count == lineNo)
        {
            // Add chars in line then
            wxString tmp;

            for (size_t j = i; j < content.Length(); j++)
            {
                if (content[j] == '\n')
                    return tmp;

                tmp += content[j];
            }

            return tmp;
        }
        if (content[i] == '\n') count++;
    }
    return wxEmptyString ;
}

int  wxMacTextControl::GetLineLength(long lineNo) const
{
    // TODO change this if possible to reflect real lines
    wxString content = GetStringValue() ;

    // Find line first
    int count = 0;
    for (size_t i = 0; i < content.Length() ; i++)
    {
        if (count == lineNo)
        {
            // Count chars in line then
            count = 0;
            for (size_t j = i; j < content.Length(); j++)
            {
                count++;
                if (content[j] == '\n') return count;
            }

            return count;
        }
        if (content[i] == '\n') count++;
    }
    return 0 ;
}

// ----------------------------------------------------------------------------
// standard unicode control implementation
// ----------------------------------------------------------------------------

#if TARGET_API_MAC_OSX

wxMacUnicodeTextControl::wxMacUnicodeTextControl( wxTextCtrl *wxPeer,
                         const wxString& str,
                         const wxPoint& pos,
                         const wxSize& size, long style ) : wxMacTextControl( wxPeer )
{
    m_font = wxPeer->GetFont() ;
    m_windowStyle = style ;
    Rect bounds = wxMacGetBoundsForControl( wxPeer , pos , size ) ;
    wxString st = str ;
    wxMacConvertNewlines10To13( &st ) ;
    wxMacCFStringHolder cf(st , m_font.GetEncoding()) ;
    CFStringRef cfr = cf ;
    Boolean isPassword = ( m_windowStyle & wxTE_PASSWORD ) != 0 ;
    m_valueTag = isPassword ? kControlEditTextPasswordCFStringTag : kControlEditTextCFStringTag ;
    CreateEditUnicodeTextControl( MAC_WXHWND(wxPeer->MacGetTopLevelWindowRef()), &bounds , cfr , isPassword , NULL , &m_controlRef ) ;

    if ( !(m_windowStyle & wxTE_MULTILINE) )
    {
        SetData<Boolean>( kControlEditTextPart , kControlEditTextSingleLineTag , true ) ;
    }
}

wxMacUnicodeTextControl::~wxMacUnicodeTextControl()
{
}

void wxMacUnicodeTextControl::VisibilityChanged(bool shown)
{
    if ( !(m_windowStyle & wxTE_MULTILINE) && shown )
    {
        // work around a refresh issue insofar as not always the entire content is shown even if this would be possible
        ControlEditTextSelectionRec sel ;
        CFStringRef value = NULL ;

        verify_noerr( GetData<ControlEditTextSelectionRec>( 0, kControlEditTextSelectionTag, &sel ) );
        verify_noerr( GetData<CFStringRef>( 0, m_valueTag , &value ) );
        verify_noerr( SetData<CFStringRef>( 0, m_valueTag, &value ) );
        verify_noerr( SetData<ControlEditTextSelectionRec>( 0, kControlEditTextSelectionTag, &sel ) );

        CFRelease( value ) ;
    }
}
wxString wxMacUnicodeTextControl::GetStringValue() const
{
    wxString result ;
    CFStringRef value = GetData<CFStringRef>(0,m_valueTag) ;
    if ( value )
    {
        wxMacCFStringHolder cf(value) ;
        result = cf.AsString() ;
    }
#if '\n' == 10
    wxMacConvertNewlines13To10( &result ) ;
#else
    wxMacConvertNewlines10To13( &result ) ;
#endif
    return result ;
}
void wxMacUnicodeTextControl::SetStringValue( const wxString &str)
{
    wxString st = str ;
    wxMacConvertNewlines10To13( &st ) ;
    wxMacCFStringHolder cf(st , m_font.GetEncoding() ) ;
    verify_noerr( SetData<CFStringRef>(  0, m_valueTag , cf ) ) ;
}
void wxMacUnicodeTextControl::Copy()
{
    SendHICommand( kHICommandCopy ) ;
}
void wxMacUnicodeTextControl::Cut()
{
    SendHICommand( kHICommandCut ) ;
}
void wxMacUnicodeTextControl::Paste()
{
    SendHICommand( kHICommandPaste ) ;
}
bool wxMacUnicodeTextControl::CanPaste() const
{
    return true ;
}
void wxMacUnicodeTextControl::SetEditable(bool editable)
{
    SetData<Boolean>( 0 , kControlEditTextLockedTag , (Boolean) !editable ) ;
}
void wxMacUnicodeTextControl::Remove( long from , long to )
{
}

void wxMacUnicodeTextControl::GetSelection( long* from, long* to) const
{
    ControlEditTextSelectionRec sel ;
    verify_noerr(GetData<ControlEditTextSelectionRec>(  0, kControlEditTextSelectionTag, &sel ) ) ;
    if ( from ) *from = sel.selStart ;
    if ( to ) *to = sel.selEnd ;
}

void wxMacUnicodeTextControl::SetSelection( long from , long to )
{
    ControlEditTextSelectionRec sel ;
    sel.selStart = from ;
    sel.selEnd = to ;
    SetData<ControlEditTextSelectionRec>( 0 , kControlEditTextSelectionTag, &sel ) ;
}

void wxMacUnicodeTextControl::WriteText(const wxString& str)
{
    wxString st = str ;
    wxMacConvertNewlines10To13( &st ) ;
    #if MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_2
        wxMacCFStringHolder cf(st , m_font.GetEncoding() ) ;
        CFStringRef value = cf ;
        SetData<CFStringRef>( 0, kControlEditTextInsertCFStringRefTag, &value );
    #else
        wxString val = GetStringValue() ;
        long start , end ;
        GetSelection( &start , &end ) ;
        val.Remove( start , end - start ) ;
        val.insert( start , str ) ;
        SetStringValue( val ) ;
        SetSelection( start + str.Length() , start + str.Length() ) ;
    #endif
}

#endif

// ----------------------------------------------------------------------------
// MLTE control implementation (common part)
// ----------------------------------------------------------------------------

// if mlte is on read only , no changes at all are allowed, not even from
// procedural API, in order to allow changes via API all the same we must undo
// the readonly status while we are executing, this class helps to do so

class wxMacEditHelper
{
public :
    wxMacEditHelper( TXNObject txn )
    {
        TXNControlTag tag[] = { kTXNIOPrivilegesTag } ;
        m_txn = txn ;
        TXNGetTXNObjectControls( m_txn , 1 , tag , m_data ) ;
        if ( m_data[0].uValue == kTXNReadOnly )
        {
            TXNControlData data[] = { { kTXNReadWrite } } ;
            TXNSetTXNObjectControls( m_txn , false , 1 , tag , data ) ;
        }
    }
    ~wxMacEditHelper()
    {
        TXNControlTag tag[] = { kTXNIOPrivilegesTag } ;
        if ( m_data[0].uValue == kTXNReadOnly )
        {
            TXNSetTXNObjectControls( m_txn , false , 1 , tag , m_data ) ;
        }
    }
    protected :
        TXNObject m_txn ;
        TXNControlData m_data[1] ;
} ;

wxMacMLTEControl::wxMacMLTEControl( wxTextCtrl *peer ) : wxMacTextControl( peer ) 
{
    SetNeedsFocusRect( true ) ; 
}

wxString wxMacMLTEControl::GetStringValue() const
{
    wxString result ;
    OSStatus err ;
    Size actualSize = 0;
    {
#if wxUSE_UNICODE
        Handle theText ;
        err = TXNGetDataEncoded( m_txn , kTXNStartOffset, kTXNEndOffset, &theText , kTXNUnicodeTextData );
        // all done
        if ( err )
        {
            actualSize = 0 ;
        }
        else
        {
            actualSize = GetHandleSize( theText ) / sizeof( UniChar) ;
            if ( actualSize > 0 )
            {
                wxChar *ptr = NULL ;
#if SIZEOF_WCHAR_T == 2
                ptr = new wxChar[actualSize + 1 ] ;
                wxStrncpy( ptr , (wxChar*) *theText , actualSize ) ;
#else
                SetHandleSize( theText , ( actualSize + 1 ) * sizeof( UniChar ) ) ;
                HLock( theText ) ;
                (((UniChar*)*theText)[actualSize]) = 0 ;
                wxMBConvUTF16BE converter ;
                size_t noChars = converter.MB2WC( NULL , (const char*)*theText , 0 ) ;
                ptr = new wxChar[noChars + 1] ;

                noChars = converter.MB2WC( ptr , (const char*)*theText , noChars ) ;
                ptr[noChars] = 0 ;
                HUnlock( theText ) ;
#endif
                ptr[actualSize] = 0 ;
                result = wxString( ptr ) ;
                delete[] ptr ;
            }
            DisposeHandle( theText ) ;
        }
#else
        Handle theText ;
        err = TXNGetDataEncoded( m_txn , kTXNStartOffset, kTXNEndOffset, &theText , kTXNTextData );
        // all done
        if ( err )
        {
            actualSize = 0 ;
        }
        else
        {
            actualSize = GetHandleSize( theText ) ;
            if ( actualSize > 0 )
            {
                HLock( theText ) ;
                result = wxString( *theText , wxConvLocal , actualSize ) ;
                HUnlock( theText ) ;
            }
            DisposeHandle( theText ) ;
        }
#endif
    }
#if '\n' == 10
    wxMacConvertNewlines13To10( &result ) ;
#else
    wxMacConvertNewlines10To13( &result ) ;
#endif
    return result ;
}

void wxMacMLTEControl::SetStringValue( const wxString &str)
{
    wxString st = str ;

    wxMacConvertNewlines10To13( &st ) ;
    {
        wxMacWindowClipper c( m_peer ) ;
        {
            wxMacEditHelper help(m_txn) ;
            SetTXNData( st , kTXNStartOffset, kTXNEndOffset ) ;
        }
        TXNSetSelection( m_txn, 0, 0);
        TXNShowSelection( m_txn, kTXNShowStart);
    }
}

TXNFrameOptions wxMacMLTEControl::FrameOptionsFromWXStyle( long wxStyle )
{
    TXNFrameOptions frameOptions =
        kTXNDontDrawCaretWhenInactiveMask ;
        
    if ( ! ( wxStyle & wxTE_NOHIDESEL ) )
        frameOptions |= kTXNDontDrawSelectionWhenInactiveMask ;

    if ( wxStyle & wxTE_MULTILINE )
    {
        if ( ! ( wxStyle & wxTE_DONTWRAP ) )
            frameOptions |= kTXNAlwaysWrapAtViewEdgeMask ;
        else
        {
            frameOptions |= kTXNAlwaysWrapAtViewEdgeMask ;
            frameOptions |= kTXNWantHScrollBarMask ;
        }

        if ( !(wxStyle & wxTE_NO_VSCROLL ) )
        {
            frameOptions |= kTXNWantVScrollBarMask ;
            if ( frameOptions & kTXNWantHScrollBarMask )
                frameOptions |= kTXNDrawGrowIconMask ;
        }
    }
    else
        frameOptions |= kTXNSingleLineOnlyMask ;

    if ( wxStyle & wxHSCROLL )
        frameOptions |= kTXNWantHScrollBarMask ;

    return frameOptions ;
}

void wxMacMLTEControl::AdjustCreationAttributes( const wxColour &background, bool visible )
{
    TXNControlTag iControlTags[] = 
        { 
            kTXNDoFontSubstitution, 
            kTXNWordWrapStateTag ,
        };
    TXNControlData iControlData[] = 
        { 
            {false}, 
            {kTXNNoAutoWrap},
        };
        
    int toptag = WXSIZEOF( iControlTags ) ;

    if ( m_windowStyle & wxTE_MULTILINE )
    {
        if (m_windowStyle & wxTE_DONTWRAP)
            iControlData[1].uValue = kTXNNoAutoWrap ;
        else
            iControlData[1].uValue = kTXNAutoWrap ;
    }
    verify_noerr( TXNSetTXNObjectControls( m_txn, false, toptag,
                                        iControlTags, iControlData )) ;

    // setting the default font

    Str255 fontName ;
    SInt16 fontSize ;
    Style fontStyle ;

    GetThemeFont(kThemeSystemFont , GetApplicationScript() , fontName , &fontSize , &fontStyle ) ;

    TXNTypeAttributes typeAttr[] =
    {
        {   kTXNQDFontNameAttribute , kTXNQDFontNameAttributeSize , { (void*) fontName } } ,
        {   kTXNQDFontSizeAttribute , kTXNFontSizeAttributeSize , { (void*) (fontSize << 16) } } ,
        {   kTXNQDFontStyleAttribute , kTXNQDFontStyleAttributeSize , {  (void*) normal } } ,
    } ;

    verify_noerr( TXNSetTypeAttributes (m_txn, sizeof( typeAttr ) / sizeof(TXNTypeAttributes) , typeAttr,
          kTXNStartOffset,
          kTXNEndOffset) );

    if ( m_windowStyle & wxTE_PASSWORD )
    {
        UniChar c = 0xA5 ;
        verify_noerr(TXNEchoMode( m_txn , c , 0 , true )) ;
    }

    TXNBackground tback;
    tback.bgType = kTXNBackgroundTypeRGB;
    tback.bg.color = MAC_WXCOLORREF( background.GetPixel() );
    TXNSetBackground( m_txn , &tback);
}

void wxMacMLTEControl::SetBackground( const wxBrush &brush )
{
    // currently only solid background are supported
    TXNBackground tback;
    tback.bgType = kTXNBackgroundTypeRGB;
    tback.bg.color = MAC_WXCOLORREF( brush.GetColour().GetPixel() );
    TXNSetBackground( m_txn , &tback);
}

void wxMacMLTEControl::TXNSetAttribute( const wxTextAttr& style , long from , long to)
{
    TXNTypeAttributes typeAttr[4] ;
    Str255 fontName = "\pMonaco" ;
    SInt16 fontSize = 12 ;
    Style fontStyle = normal ;
    RGBColor color ;
    int attrCounter = 0 ;
    if ( style.HasFont() )
    {
        const wxFont &font = style.GetFont() ;
        wxMacStringToPascal( font.GetFaceName() , fontName ) ;
        fontSize = font.GetPointSize() ;
        if ( font.GetUnderlined() )
            fontStyle |= underline ;
        if ( font.GetWeight() == wxBOLD )
            fontStyle |= bold ;
        if ( font.GetStyle() == wxITALIC )
            fontStyle |= italic ;

        typeAttr[attrCounter].tag = kTXNQDFontNameAttribute ;
        typeAttr[attrCounter].size = kTXNQDFontNameAttributeSize ;
        typeAttr[attrCounter].data.dataPtr = (void*) fontName ;
        typeAttr[attrCounter+1].tag = kTXNQDFontSizeAttribute ;
        typeAttr[attrCounter+1].size = kTXNFontSizeAttributeSize ;
        typeAttr[attrCounter+1].data.dataValue =  (fontSize << 16) ;
        typeAttr[attrCounter+2].tag = kTXNQDFontStyleAttribute ;
        typeAttr[attrCounter+2].size = kTXNQDFontStyleAttributeSize ;
        typeAttr[attrCounter+2].data.dataValue = fontStyle ;
        attrCounter += 3 ;
    }
    if ( style.HasTextColour() )
    {
        typeAttr[attrCounter].tag = kTXNQDFontColorAttribute ;
        typeAttr[attrCounter].size = kTXNQDFontColorAttributeSize ;
        typeAttr[attrCounter].data.dataPtr = (void*) &color ;
        color = MAC_WXCOLORREF(style.GetTextColour().GetPixel()) ;
        attrCounter += 1 ;
    }
    if ( attrCounter > 0 )
    {
        verify_noerr( TXNSetTypeAttributes ( m_txn , attrCounter , typeAttr, from , to) );
    }
}

void wxMacMLTEControl::SetFont( const wxFont & font , const wxColour& foreground , long windowStyle )
{
    wxMacEditHelper help(m_txn) ;
    TXNSetAttribute( wxTextAttr(foreground,wxNullColour,font) , kTXNStartOffset,kTXNEndOffset ) ;
}
void wxMacMLTEControl::SetStyle(long start, long end, const wxTextAttr& style)
{
    wxMacEditHelper help(m_txn) ;
    TXNSetAttribute( style , start,end ) ;
}

void wxMacMLTEControl::Copy()
{
    ClearCurrentScrap();
    TXNCopy(m_txn);
    TXNConvertToPublicScrap();
}

void wxMacMLTEControl::Cut()
{
    ClearCurrentScrap();
    TXNCut(m_txn);
    TXNConvertToPublicScrap();
}

void wxMacMLTEControl::Paste()
{
    TXNConvertFromPublicScrap();
    TXNPaste(m_txn);
}

bool wxMacMLTEControl::CanPaste() const
{
    return TXNIsScrapPastable() ;
}

void wxMacMLTEControl::SetEditable(bool editable)
{
    TXNControlTag tag[] = { kTXNIOPrivilegesTag } ;
    TXNControlData data[] = { { editable ? kTXNReadWrite : kTXNReadOnly } } ;
    TXNSetTXNObjectControls( m_txn , false , WXSIZEOF(tag) , tag , data ) ;
}

wxTextPos wxMacMLTEControl::GetLastPosition() const
{
    wxTextPos actualsize = 0 ;

    Handle theText ;
    OSErr err = TXNGetDataEncoded( m_txn, kTXNStartOffset, kTXNEndOffset, &theText , kTXNTextData );
    /* all done */
    if ( err )
    {
        actualsize = 0 ;
    }
    else
    {
        actualsize = GetHandleSize( theText ) ;
        DisposeHandle( theText ) ;
    }

    return actualsize ;
}

void wxMacMLTEControl::Replace( long from , long to , const wxString str )
{
    wxString value = str ;
    wxMacConvertNewlines10To13( &value ) ;

    wxMacEditHelper help( m_txn ) ;
    wxMacWindowClipper c( m_peer ) ;

    TXNSetSelection(m_txn , from , to ) ;
    TXNClear( m_txn ) ;
    SetTXNData( value , kTXNUseCurrentSelection, kTXNUseCurrentSelection ) ;
}

void wxMacMLTEControl::Remove( long from , long to )
{
    wxMacWindowClipper c( m_peer ) ;
    wxMacEditHelper help( m_txn ) ;
    TXNSetSelection(m_txn , from , to ) ;
    TXNClear( m_txn ) ;
}

void wxMacMLTEControl::GetSelection( long* from, long* to) const
{
    TXNGetSelection( m_txn , (TXNOffset*) from , (TXNOffset*) to ) ;
}

void wxMacMLTEControl::SetSelection( long from , long to )
{
    wxMacWindowClipper c( m_peer ) ;
    /* change the selection */
    if ((from == -1) && (to == -1))
        TXNSelectAll(m_txn);
    else
        TXNSetSelection( m_txn, from, to);
    TXNShowSelection( m_txn, kTXNShowStart);
}

void wxMacMLTEControl::WriteText(const wxString& str)
{
    wxString st = str ;
    wxMacConvertNewlines10To13( &st ) ;

    long start , end , dummy ;
    GetSelection( &start , &dummy ) ;
    wxMacWindowClipper c( m_peer ) ;
    {
        wxMacEditHelper helper( m_txn ) ;
        SetTXNData( st , kTXNUseCurrentSelection, kTXNUseCurrentSelection ) ;
    }
    GetSelection( &dummy , &end ) ;
    // TODO SetStyle( start , end , GetDefaultStyle() ) ;
}

void wxMacMLTEControl::Clear()
{
    wxMacWindowClipper c( m_peer ) ;
    wxMacEditHelper st(m_txn) ;
    TXNSetSelection( m_txn , kTXNStartOffset , kTXNEndOffset ) ;
    TXNClear(m_txn);
}

bool wxMacMLTEControl::CanUndo() const
{
    return TXNCanUndo( m_txn , NULL ) ;
}

void wxMacMLTEControl::Undo()
{
    TXNUndo( m_txn ) ;
}

bool wxMacMLTEControl::CanRedo()  const
{
    return TXNCanRedo( m_txn , NULL ) ;
}

void wxMacMLTEControl::Redo()
{
    TXNRedo( m_txn ) ;
}

int wxMacMLTEControl::GetNumberOfLines() const
{
    ItemCount lines = 0 ;
    TXNGetLineCount(m_txn, &lines ) ;
    return lines ;
}

long wxMacMLTEControl::XYToPosition(long x, long y) const
{
    Point curpt ;

    wxTextPos lastpos = GetLastPosition() ;

    // TODO find a better implementation : while we can get the
    // line metrics of a certain line, we don't get its starting
    // position, so it would probably be rather a binary search
    // for the start position
    long xpos = 0 ;
    long ypos = 0 ;
    int lastHeight = 0 ;

    ItemCount n ;
    for ( n = 0 ; n <= (ItemCount) lastpos ; ++n )
    {
        if ( y == ypos && x == xpos )
            return n ;

        TXNOffsetToPoint( m_txn ,  n , &curpt);

        if ( curpt.v > lastHeight )
        {
            xpos = 0 ;
            if ( n > 0 )
                ++ypos ;
            lastHeight = curpt.v ;
        }
        else
            ++xpos ;
    }
    return 0 ;
}

bool wxMacMLTEControl::PositionToXY(long pos, long *x, long *y) const
{
    Point curpt ;

    wxTextPos lastpos = GetLastPosition() ;

    if ( y ) *y = 0 ;
    if ( x ) *x = 0 ;

    if ( pos <= lastpos )
    {
        // TODO find a better implementation : while we can get the
        // line metrics of a certain line, we don't get its starting
        // position, so it would probably be rather a binary search
        // for the start position
        long xpos = 0 ;
        long ypos = 0 ;
        int lastHeight = 0 ;

        ItemCount n ;
        for ( n = 0 ; n <= (ItemCount) pos ; ++n )
        {
            TXNOffsetToPoint(m_txn ,  n , &curpt);

            if ( curpt.v > lastHeight )
            {
                xpos = 0 ;
                if ( n > 0 )
                    ++ypos ;
                lastHeight = curpt.v ;
            }
            else
                ++xpos ;
        }
        if ( y ) *y = ypos ;
        if ( x ) *x = xpos ;
    }

    return false ;
}

void wxMacMLTEControl::ShowPosition( long pos )
{
#if TARGET_RT_MAC_MACHO && defined(AVAILABLE_MAC_OS_X_VERSION_10_2_AND_LATER)
    {
        Point current ;
        Point desired ;
        TXNOffset selstart , selend ;
        TXNGetSelection(  m_txn , &selstart , &selend) ;
        TXNOffsetToPoint( m_txn,  selstart , &current);
        TXNOffsetToPoint( m_txn,  pos , &desired);
        //TODO use HIPoints for 10.3 and above
        if ( (UInt32) TXNScroll != (UInt32) kUnresolvedCFragSymbolAddress )
        {
            OSErr theErr = noErr;
            SInt32 dv = desired.v - current.v ;
            SInt32 dh = desired.h - current.h ;
            TXNShowSelection( m_txn , true ) ;
            theErr = TXNScroll( m_txn, kTXNScrollUnitsInPixels , kTXNScrollUnitsInPixels , &dv , &dh );
            wxASSERT_MSG( theErr == noErr, _T("TXNScroll returned an error!") );
        }
    }
#endif
}

void wxMacMLTEControl::SetTXNData( const wxString& st , TXNOffset start , TXNOffset end )
{
#if wxUSE_UNICODE
#if SIZEOF_WCHAR_T == 2
    size_t len = st.Len() ;
    TXNSetData( m_txn , kTXNUnicodeTextData,  (void*)st.wc_str(), len * 2,
      start, end);
#else
    wxMBConvUTF16BE converter ;
    ByteCount byteBufferLen = converter.WC2MB( NULL , st.wc_str() , 0 ) ;
    UniChar *unibuf = (UniChar*) malloc(byteBufferLen) ;
    converter.WC2MB( (char*) unibuf , st.wc_str() , byteBufferLen ) ;
    TXNSetData( m_txn , kTXNUnicodeTextData,  (void*)unibuf, byteBufferLen ,
      start, end);
    free( unibuf ) ;
#endif
#else
    wxCharBuffer text =  st.mb_str(wxConvLocal)  ;
    TXNSetData( m_txn , kTXNTextData,  (void*)text.data(), strlen( text ) ,
      start, end);
#endif
}


wxString wxMacMLTEControl::GetLineText(long lineNo) const
{
    wxString line ;

    if ( lineNo < GetNumberOfLines() )
    {
        long ypos = 0 ;

        Fixed   lineWidth,
                lineHeight,
                currentHeight = 0;

        // get the first possible position in the control
        Point firstPoint;
        TXNOffsetToPoint(m_txn, 0, &firstPoint);

        // Iterate through the lines until we reach the one we want,
        // adding to our current y pixel point position
        while (ypos < lineNo)
        {
            TXNGetLineMetrics(m_txn, ypos++, &lineWidth, &lineHeight);
            currentHeight += lineHeight;
        }

        Point thePoint = { firstPoint.v + (currentHeight >> 16), firstPoint.h + (0) };
        TXNOffset theOffset;
        TXNPointToOffset(m_txn, thePoint, &theOffset);

        wxString content = GetStringValue() ;
        Point currentPoint = thePoint;
        while(thePoint.v == currentPoint.v && theOffset < content.length())
        {
            line += content[theOffset];
            TXNOffsetToPoint(m_txn, ++theOffset, &currentPoint);
        }
    }
    return line ;
}

int  wxMacMLTEControl::GetLineLength(long lineNo) const
{
    int theLength = 0;

    if ( lineNo < GetNumberOfLines() )
    {
        long ypos = 0 ;

        Fixed   lineWidth,
                lineHeight,
                currentHeight = 0;

        // get the first possible position in the control
        Point firstPoint;
        TXNOffsetToPoint(m_txn, 0, &firstPoint);

        // Iterate through the lines until we reach the one we want,
        // adding to our current y pixel point position
        while (ypos < lineNo)
        {
            TXNGetLineMetrics(m_txn, ypos++, &lineWidth, &lineHeight);
            currentHeight += lineHeight;
        }

        Point thePoint = { firstPoint.v + (currentHeight >> 16), firstPoint.h + (0) };
        TXNOffset theOffset;
        TXNPointToOffset(m_txn, thePoint, &theOffset);

        wxString content = GetStringValue() ;
        Point currentPoint = thePoint;
        while(thePoint.v == currentPoint.v && theOffset < content.length())
        {
            ++theLength;
            TXNOffsetToPoint(m_txn, ++theOffset, &currentPoint);
        }
    }
    return theLength ;
}


// ----------------------------------------------------------------------------
// MLTE control implementation (classic part)
// ----------------------------------------------------------------------------

// OS X Notes : We still don't have a full replacement for MLTE, so this implementation
// has to live on. We have different problems coming from outdated implementations on the
// various OS X versions. Most deal with the scrollbars: they are not correctly embedded
// while this can be solved on 10.3 by reassigning them the correct place, on 10.2 there is
// no way out, therefore we are using our own implementation and our own scrollbars ....

#ifdef __WXMAC_OSX__

TXNScrollInfoUPP gTXNScrollInfoProc = NULL ;
ControlActionUPP gTXNScrollActionProc = NULL ;

pascal void wxMacMLTEClassicControl::TXNScrollInfoProc (SInt32 iValue, SInt32 iMaximumValue, TXNScrollBarOrientation 
    iScrollBarOrientation, SInt32 iRefCon)
{
    wxMacMLTEClassicControl* mlte = (wxMacMLTEClassicControl*) iRefCon ;
    SInt32 value =  wxMax( iValue , 0 ) ;
    SInt32 maximum = wxMax( iMaximumValue , 0 ) ;
    
    if ( iScrollBarOrientation == kTXNHorizontal )
    {
        if ( mlte->m_sbHorizontal )
        {
            SetControl32BitValue( mlte->m_sbHorizontal , value ) ;
            SetControl32BitMaximum( mlte->m_sbHorizontal , maximum ) ;
            mlte->m_lastHorizontalValue = value ;
        }
    }
    else if ( iScrollBarOrientation == kTXNVertical )
    {
        if ( mlte->m_sbVertical )
        {
            SetControl32BitValue( mlte->m_sbVertical , value ) ;
            SetControl32BitMaximum( mlte->m_sbVertical , maximum ) ;
            mlte->m_lastVerticalValue = value ;
        }
    }
}

pascal void wxMacMLTEClassicControl::TXNScrollActionProc( ControlRef controlRef , ControlPartCode partCode )
{
    OSStatus err ;
    wxMacMLTEClassicControl* mlte = (wxMacMLTEClassicControl*) GetControlReference( controlRef ) ;
    if ( mlte == NULL )
        return ;
        
    if ( controlRef != mlte->m_sbVertical && controlRef != mlte->m_sbHorizontal )
        return ;    
        
    bool isHorizontal = ( controlRef == mlte->m_sbHorizontal ) ; 
        
    SInt32 minimum = 0 ;
    SInt32 maximum = GetControl32BitMaximum( controlRef ) ;
    SInt32 value = GetControl32BitValue( controlRef ) ;
    SInt32 delta = 0;
    switch ( partCode )
    {
        case kControlDownButtonPart :
            delta = 10 ;
            break ;
        case kControlUpButtonPart :
            delta = -10 ;
            break ;
        case kControlPageDownPart :
            delta = GetControlViewSize( controlRef ) ;
            break ;
        case kControlPageUpPart :
            delta = -GetControlViewSize( controlRef )  ;
            break ;
        case kControlIndicatorPart :
            delta = value - 
                ( isHorizontal ? mlte->m_lastHorizontalValue : mlte->m_lastVerticalValue ) ;
            break ;
        default :
            break ;
    }
    if ( delta != 0 )
    {
        SInt32 newValue = value ;
        
        if ( partCode != kControlIndicatorPart )
        {
            if( value + delta < minimum )
                delta = minimum - value ;
            if ( value + delta > maximum )
                delta = maximum - value ;

            SetControl32BitValue( controlRef , value + delta ) ;
            newValue = value + delta ;
        }
        
        SInt32 verticalDelta = isHorizontal ? 0 : delta ;
        SInt32 horizontalDelta = isHorizontal ? delta : 0 ;
        
        err = TXNScroll( mlte->m_txn , kTXNScrollUnitsInPixels, kTXNScrollUnitsInPixels,
                                    &verticalDelta , &horizontalDelta  );
                                    
        if ( isHorizontal )
            mlte->m_lastHorizontalValue = newValue ;
        else
            mlte->m_lastVerticalValue = newValue ;
    }
}
#endif

// make correct activations
void wxMacMLTEClassicControl::MacActivatePaneText(Boolean setActive) 
{
    wxTextCtrl* textctrl = (wxTextCtrl*) GetControlReference(m_controlRef);

    wxMacWindowClipper clipper( textctrl ) ;
    TXNActivate(m_txn, m_txnFrameID, setActive);

    ControlRef controlFocus = 0 ;
    GetKeyboardFocus( m_txnWindow , &controlFocus ) ;
    if ( controlFocus == m_controlRef )
        TXNFocus( m_txn, setActive);
}

void wxMacMLTEClassicControl::MacFocusPaneText(Boolean setFocus) 
{
    TXNFocus( m_txn, setFocus);
}

// guards against inappropriate redraw (hidden objects drawing onto window) 

void wxMacMLTEClassicControl::MacSetObjectVisibility(Boolean vis)
{
    ControlRef controlFocus = 0 ;
    GetKeyboardFocus( m_txnWindow , &controlFocus ) ;
    
    if ( controlFocus == m_controlRef && vis == false )
    {
        SetKeyboardFocus( m_txnWindow , m_controlRef , kControlFocusNoPart ) ;
    }
    // we right now are always clipping as partial visibility (overlapped) visibility
    // is also a problem, if we run into further problems we might set the FrameBounds to an empty
    // rect here
}

// make sure that the TXNObject is at the right position

void wxMacMLTEClassicControl::MacUpdatePosition() 
{
    wxTextCtrl* textctrl = (wxTextCtrl*) GetControlReference(m_controlRef);
    if ( textctrl == NULL )
        return ;

    Rect bounds ;
    UMAGetControlBoundsInWindowCoords(m_controlRef, &bounds);
    
    if ( !EqualRect( &bounds , &m_txnControlBounds ) )
    {
        // old position
        Rect oldBounds = m_txnControlBounds ;
        m_txnControlBounds = bounds ;
        wxMacWindowClipper cl(textctrl) ;

#ifdef __WXMAC_OSX__
        bool isCompositing = textctrl->MacGetTopLevelWindow()->MacUsesCompositing() ;
        if ( m_sbHorizontal || m_sbVertical )
        {
            int w = bounds.right - bounds.left ;
            int h = bounds.bottom - bounds.top ;

            if ( m_sbHorizontal )
            {
                Rect sbBounds ;

                sbBounds.left = -1 ;
                sbBounds.top = h - 14 ;
                sbBounds.right = w + 1 ;
                sbBounds.bottom = h + 1 ;
                
                if ( !isCompositing )
                    OffsetRect( &sbBounds , m_txnControlBounds.left , m_txnControlBounds.top ) ;
                
                SetControlBounds( m_sbHorizontal , &sbBounds ) ;
                SetControlViewSize( m_sbHorizontal , w ) ;
            }
            if ( m_sbVertical )
            {
                Rect sbBounds ;

                sbBounds.left = w - 14 ;
                sbBounds.top = -1 ;
                sbBounds.right = w + 1 ;
                sbBounds.bottom = m_sbHorizontal ? h - 14 : h + 1  ;
                
                if ( !isCompositing )
                    OffsetRect( &sbBounds , m_txnControlBounds.left , m_txnControlBounds.top ) ;

                SetControlBounds( m_sbVertical , &sbBounds ) ;
                SetControlViewSize( m_sbVertical , h ) ;
            }
        }
        TXNSetFrameBounds( m_txn, m_txnControlBounds.top, m_txnControlBounds.left,
            m_txnControlBounds.bottom - ( m_sbHorizontal ? 14 : 0 ) , m_txnControlBounds.right - ( m_sbVertical ? 14 : 0 ), m_txnFrameID);
#else
        
        TXNSetFrameBounds( m_txn, m_txnControlBounds.top, m_txnControlBounds.left,
            wxMax( m_txnControlBounds.bottom , m_txnControlBounds.top ) , 
            wxMax( m_txnControlBounds.right , m_txnControlBounds.left ) , m_txnFrameID);

        // the SetFrameBounds method unter classic sometimes does not correctly scroll a selection into sight after a 
        // movement, therefore we have to force it

        TXNLongRect textRect ;
        TXNGetRectBounds( m_txn , NULL , NULL , &textRect ) ;        
        if ( textRect.left < m_txnControlBounds.left )
        {
            TXNShowSelection( m_txn , false ) ;
        }
#endif
    }
}

void wxMacMLTEClassicControl::SetRect( Rect *r ) 
{
    wxMacControl::SetRect( r ) ;
    MacUpdatePosition() ;
}

void wxMacMLTEClassicControl::MacControlUserPaneDrawProc(wxInt16 thePart) 
{
    wxTextCtrl* textctrl = (wxTextCtrl*) GetControlReference(m_controlRef);
    if ( textctrl == NULL )
        return ;

    if ( textctrl->MacIsReallyShown() )
    {
        wxMacWindowClipper clipper( textctrl ) ;
        TXNDraw( m_txn , NULL ) ;
    }
}

wxInt16 wxMacMLTEClassicControl::MacControlUserPaneHitTestProc(wxInt16 x, wxInt16 y) 
{
    Point where = { y , x } ;
    ControlPartCode result;

    result = 0;
    wxTextCtrl* textctrl = (wxTextCtrl*) GetControlReference(m_controlRef);
    if ( textctrl == NULL )
        return 0 ;
        
    if (textctrl->MacIsReallyShown() )
    {
        if (PtInRect(where, &m_txnControlBounds))
            result = kControlEditTextPart ;
        else
        {
            // sometimes we get the coords also in control local coordinates, therefore test again
            if ( textctrl->MacGetTopLevelWindow()->MacUsesCompositing() )
            {
                int x = 0 , y = 0 ;
                textctrl->MacClientToRootWindow( &x , &y ) ;
                where.h += x ;
                where.v += y ;
            }
            if (PtInRect(where, &m_txnControlBounds))
                result = kControlEditTextPart ;
            else
                result = 0;
        }
    }
    return result;
}

wxInt16 wxMacMLTEClassicControl::MacControlUserPaneTrackingProc( wxInt16 x, wxInt16 y, void* actionProc ) 
{
    wxTextCtrl* textctrl = (wxTextCtrl*) GetControlReference(m_controlRef);
    if ( textctrl == NULL )
        return 0;

    ControlPartCode partCodeResult = 0;

    if (textctrl->MacIsReallyShown() )
    {
        Point startPt = { y ,x } ;
        // for compositing, we must convert these into toplevel window coordinates, because hittesting expects them
        if ( textctrl->MacGetTopLevelWindow()->MacUsesCompositing() )
        {
            int x = 0 , y = 0 ;
            textctrl->MacClientToRootWindow( &x , &y ) ;
            startPt.h += x ;
            startPt.v += y ;
        }

        switch (MacControlUserPaneHitTestProc( startPt.h , startPt.v ))
        {
            case kControlEditTextPart :
            {
                wxMacWindowClipper clipper( textctrl ) ;

                EventRecord rec ;
                ConvertEventRefToEventRecord( (EventRef) wxTheApp->MacGetCurrentEvent() , &rec ) ;
                TXNClick( m_txn, &rec );

            }
            break;
        }
    }
    return partCodeResult;
}

void wxMacMLTEClassicControl::MacControlUserPaneIdleProc() 
{
    wxTextCtrl* textctrl = (wxTextCtrl*) GetControlReference(m_controlRef);
    if ( textctrl == NULL )
        return ;

    if (textctrl->MacIsReallyShown()) 
    {
        if (IsControlActive(m_controlRef)) 
        {
            Point mousep;

            wxMacWindowClipper clipper( textctrl ) ;
            GetMouse(&mousep);

            TXNIdle(m_txn);

            if (PtInRect(mousep, &m_txnControlBounds)) 
            {
                RgnHandle theRgn;
                RectRgn((theRgn = NewRgn()), &m_txnControlBounds);
                TXNAdjustCursor(m_txn, theRgn);
                DisposeRgn(theRgn);
            }
        }
    }
}

wxInt16 wxMacMLTEClassicControl::MacControlUserPaneKeyDownProc (wxInt16 keyCode, wxInt16 charCode, wxInt16 modifiers) 
{
    wxTextCtrl* textctrl = (wxTextCtrl*) GetControlReference(m_controlRef);
    if ( textctrl == NULL )
        return 0;

    wxMacWindowClipper clipper( textctrl ) ;

    EventRecord ev ;
    memset( &ev , 0 , sizeof( ev ) ) ;
    ev.what = keyDown ;
    ev.modifiers = modifiers ;
    ev.message = (( keyCode << 8 ) & keyCodeMask ) + ( charCode & charCodeMask ) ;
    TXNKeyDown( m_txn , &ev);

    return kControlEntireControl;
}

void wxMacMLTEClassicControl::MacControlUserPaneActivateProc( bool activating) 
{
    MacActivatePaneText( activating );
}

wxInt16 wxMacMLTEClassicControl::MacControlUserPaneFocusProc(wxInt16 action) 
{
    ControlPartCode focusResult;

    focusResult = kControlFocusNoPart;
    wxTextCtrl* textctrl = (wxTextCtrl*) GetControlReference(m_controlRef);
    if ( textctrl == NULL )
        return 0;

    wxMacWindowClipper clipper( textctrl ) ;
    
    ControlRef controlFocus = 0 ;
    GetKeyboardFocus( m_txnWindow , &controlFocus ) ;
    bool wasFocused = ( controlFocus == m_controlRef ) ;

    switch (action) 
    {
        case kControlFocusPrevPart:
        case kControlFocusNextPart:
            MacFocusPaneText( ( !wasFocused));
            focusResult = (!wasFocused) ? (ControlPartCode) kControlEditTextPart : (ControlPartCode) kControlFocusNoPart;
            break;
            
        case kControlFocusNoPart:
        default:
            MacFocusPaneText( false);
            focusResult = kControlFocusNoPart;
            break;
    }

    return focusResult;
}

void wxMacMLTEClassicControl::MacControlUserPaneBackgroundProc( void *info )
{
}

wxMacMLTEClassicControl::wxMacMLTEClassicControl( wxTextCtrl *wxPeer,
                         const wxString& str,
                         const wxPoint& pos,
                         const wxSize& size, long style ) : wxMacMLTEControl( wxPeer )
{
    m_font = wxPeer->GetFont() ;
    m_windowStyle = style ;
    Rect bounds = wxMacGetBoundsForControl( wxPeer , pos , size ) ;
    wxString st = str ;
    wxMacConvertNewlines10To13( &st ) ;

    short featurSet;

    featurSet = kControlSupportsEmbedding | kControlSupportsFocus  | kControlWantsIdle
            | kControlWantsActivate  | kControlHandlesTracking // | kControlHasSpecialBackground
            | kControlGetsFocusOnClick | kControlSupportsLiveFeedback;

    verify_noerr( ::CreateUserPaneControl( MAC_WXHWND(wxPeer->GetParent()->MacGetTopLevelWindowRef()), &bounds, featurSet, &m_controlRef ) );

    DoCreate();

    MacSetObjectVisibility( wxPeer->MacIsReallyShown() ) ;

    AdjustCreationAttributes( *wxWHITE , true) ;

    wxMacWindowClipper clipper( m_peer ) ;
    SetTXNData( st , kTXNStartOffset, kTXNEndOffset ) ;
    TXNSetSelection( m_txn, 0, 0);
}

wxMacMLTEClassicControl::~wxMacMLTEClassicControl()
{
    TXNDeleteObject(m_txn);
    m_txn = NULL ;
}

void wxMacMLTEClassicControl::VisibilityChanged(bool shown)
{
    MacSetObjectVisibility( shown ) ;
    wxMacControl::VisibilityChanged( shown ) ;
}

void wxMacMLTEClassicControl::SuperChangedPosition()
{
    MacUpdatePosition() ;
    wxMacControl::SuperChangedPosition() ;
}

#ifdef __WXMAC_OSX__

ControlUserPaneDrawUPP gTPDrawProc = NULL;
ControlUserPaneHitTestUPP gTPHitProc = NULL;
ControlUserPaneTrackingUPP gTPTrackProc = NULL;
ControlUserPaneIdleUPP gTPIdleProc = NULL;
ControlUserPaneKeyDownUPP gTPKeyProc = NULL;
ControlUserPaneActivateUPP gTPActivateProc = NULL;
ControlUserPaneFocusUPP gTPFocusProc = NULL;

static pascal void wxMacControlUserPaneDrawProc(ControlRef control, SInt16 part)
{
    wxTextCtrl *textCtrl =  wxDynamicCast( wxFindControlFromMacControl(control) , wxTextCtrl ) ;
    wxMacMLTEClassicControl * win = textCtrl ? (wxMacMLTEClassicControl*)(textCtrl->GetPeer()) : NULL ;
    if ( win )
        win->MacControlUserPaneDrawProc(part) ;
}

static pascal ControlPartCode wxMacControlUserPaneHitTestProc(ControlRef control, Point where)
{
    wxTextCtrl *textCtrl =  wxDynamicCast( wxFindControlFromMacControl(control) , wxTextCtrl ) ;
    wxMacMLTEClassicControl * win = textCtrl ? (wxMacMLTEClassicControl*)(textCtrl->GetPeer()) : NULL ;
    if ( win )
        return win->MacControlUserPaneHitTestProc(where.h , where.v) ;
    else
        return kControlNoPart ;
}

static pascal ControlPartCode wxMacControlUserPaneTrackingProc(ControlRef control, Point startPt, ControlActionUPP actionProc)
{
    wxTextCtrl *textCtrl =  wxDynamicCast( wxFindControlFromMacControl(control) , wxTextCtrl ) ;
    wxMacMLTEClassicControl * win = textCtrl ? (wxMacMLTEClassicControl*)(textCtrl->GetPeer()) : NULL ;
    if ( win )
        return win->MacControlUserPaneTrackingProc( startPt.h , startPt.v , (void*) actionProc) ;
    else
        return kControlNoPart ;
}

static pascal void wxMacControlUserPaneIdleProc(ControlRef control)
{
    wxTextCtrl *textCtrl =  wxDynamicCast( wxFindControlFromMacControl(control) , wxTextCtrl ) ;
    wxMacMLTEClassicControl * win = textCtrl ? (wxMacMLTEClassicControl*)(textCtrl->GetPeer()) : NULL ;
    if ( win )
        win->MacControlUserPaneIdleProc() ;
}

static pascal ControlPartCode wxMacControlUserPaneKeyDownProc(ControlRef control, SInt16 keyCode, SInt16 charCode, SInt16 modifiers)
{
    wxTextCtrl *textCtrl =  wxDynamicCast( wxFindControlFromMacControl(control) , wxTextCtrl ) ;
    wxMacMLTEClassicControl * win = textCtrl ? (wxMacMLTEClassicControl*)(textCtrl->GetPeer()) : NULL ;
    if ( win )
        return win->MacControlUserPaneKeyDownProc(keyCode,charCode,modifiers) ;
    else
        return kControlNoPart ;
}

static pascal void wxMacControlUserPaneActivateProc(ControlRef control, Boolean activating)
{
    wxTextCtrl *textCtrl =  wxDynamicCast( wxFindControlFromMacControl(control) , wxTextCtrl ) ;
    wxMacMLTEClassicControl * win = textCtrl ? (wxMacMLTEClassicControl*)(textCtrl->GetPeer()) : NULL ;
    if ( win )
        win->MacControlUserPaneActivateProc(activating) ;
}

static pascal ControlPartCode wxMacControlUserPaneFocusProc(ControlRef control, ControlFocusPart action)
{
    wxTextCtrl *textCtrl =  wxDynamicCast( wxFindControlFromMacControl(control) , wxTextCtrl ) ;
    wxMacMLTEClassicControl * win = textCtrl ? (wxMacMLTEClassicControl*)(textCtrl->GetPeer()) : NULL ;
    if ( win )
        return win->MacControlUserPaneFocusProc(action) ;
    else
        return kControlNoPart ;
}

/*
static pascal void wxMacControlUserPaneBackgroundProc(ControlRef control, ControlBackgroundPtr info)
{
    wxTextCtrl *textCtrl =  wxDynamicCast( wxFindControlFromMacControl(control) , wxTextCtrl ) ;
    wxMacMLTEClassicControl * win = textCtrl ? (wxMacMLTEClassicControl*)(textCtrl->GetPeer()) : NULL ;
    if ( win )
        win->MacControlUserPaneBackgroundProc(info) ;
}
*/
#endif

// TXNRegisterScrollInfoProc

OSStatus wxMacMLTEClassicControl::DoCreate()
{
    Rect bounds;

    OSStatus err = noErr ;

    /* set up our globals */
#ifdef __WXMAC_OSX__
    if (gTPDrawProc == NULL) gTPDrawProc = NewControlUserPaneDrawUPP(wxMacControlUserPaneDrawProc);
    if (gTPHitProc == NULL) gTPHitProc = NewControlUserPaneHitTestUPP(wxMacControlUserPaneHitTestProc);
    if (gTPTrackProc == NULL) gTPTrackProc = NewControlUserPaneTrackingUPP(wxMacControlUserPaneTrackingProc);
    if (gTPIdleProc == NULL) gTPIdleProc = NewControlUserPaneIdleUPP(wxMacControlUserPaneIdleProc);
    if (gTPKeyProc == NULL) gTPKeyProc = NewControlUserPaneKeyDownUPP(wxMacControlUserPaneKeyDownProc);
    if (gTPActivateProc == NULL) gTPActivateProc = NewControlUserPaneActivateUPP(wxMacControlUserPaneActivateProc);
    if (gTPFocusProc == NULL) gTPFocusProc = NewControlUserPaneFocusUPP(wxMacControlUserPaneFocusProc);

    if (gTXNScrollInfoProc == NULL ) gTXNScrollInfoProc = NewTXNScrollInfoUPP(TXNScrollInfoProc) ;
    if (gTXNScrollActionProc == NULL ) gTXNScrollActionProc = NewControlActionUPP(TXNScrollActionProc) ;
#endif

    /* set the initial settings for our private data */

    m_txnWindow =GetControlOwner(m_controlRef);
    m_txnPort = (GrafPtr) GetWindowPort(m_txnWindow);

#ifdef __WXMAC_OSX__
    /* set up the user pane procedures */
    SetControlData(m_controlRef, kControlEntireControl, kControlUserPaneDrawProcTag, sizeof(gTPDrawProc), &gTPDrawProc);
    SetControlData(m_controlRef, kControlEntireControl, kControlUserPaneHitTestProcTag, sizeof(gTPHitProc), &gTPHitProc);
    SetControlData(m_controlRef, kControlEntireControl, kControlUserPaneTrackingProcTag, sizeof(gTPTrackProc), &gTPTrackProc);
    SetControlData(m_controlRef, kControlEntireControl, kControlUserPaneIdleProcTag, sizeof(gTPIdleProc), &gTPIdleProc);
    SetControlData(m_controlRef, kControlEntireControl, kControlUserPaneKeyDownProcTag, sizeof(gTPKeyProc), &gTPKeyProc);
    SetControlData(m_controlRef, kControlEntireControl, kControlUserPaneActivateProcTag, sizeof(gTPActivateProc), &gTPActivateProc);
    SetControlData(m_controlRef, kControlEntireControl, kControlUserPaneFocusProcTag, sizeof(gTPFocusProc), &gTPFocusProc);
#endif
    /* calculate the rectangles used by the control */
    UMAGetControlBoundsInWindowCoords(m_controlRef, &bounds);
 
    m_txnControlBounds = bounds ;
    
    CGrafPtr        origPort = NULL ;
    GDHandle        origDev = NULL ;
    GetGWorld( &origPort , &origDev ) ;
    SetPort(m_txnPort);

    /* create the new edit field */

    TXNFrameOptions frameOptions = FrameOptionsFromWXStyle( m_windowStyle ) ;

#ifdef __WXMAC_OSX__

    // the scrollbars are not correctly embedded but are inserted at the root
    // this gives us problems as we have erratic redraws even over the structure
    // area

    m_sbHorizontal = 0 ;
    m_sbVertical = 0 ;
    m_lastHorizontalValue = 0 ;
    m_lastVerticalValue = 0 ;
    
    Rect sb = { 0 , 0 , 0 , 0 } ;
    if ( frameOptions & kTXNWantVScrollBarMask )
    {
        CreateScrollBarControl( m_txnWindow , &sb , 0 , 0 , 100 , 1 , true , gTXNScrollActionProc , &m_sbVertical ) ;
        SetControlReference( m_sbVertical , (SInt32) this ) ;
        SetControlAction( m_sbVertical, gTXNScrollActionProc );
        ShowControl( m_sbVertical ) ;
        EmbedControl( m_sbVertical , m_controlRef ) ;
        frameOptions &= ~kTXNWantVScrollBarMask ;
    }
    if ( frameOptions & kTXNWantHScrollBarMask )
    {
        CreateScrollBarControl( m_txnWindow , &sb , 0 , 0 , 100 , 1 , true , gTXNScrollActionProc , &m_sbHorizontal ) ;
        SetControlReference( m_sbHorizontal , (SInt32) this ) ;
        SetControlAction( m_sbHorizontal, gTXNScrollActionProc );
        ShowControl( m_sbHorizontal ) ;
        EmbedControl( m_sbHorizontal , m_controlRef ) ;
        frameOptions &= ~(kTXNWantHScrollBarMask | kTXNDrawGrowIconMask);
    }

#endif

    verify_noerr(TXNNewObject(NULL, m_txnWindow , &bounds,
                              frameOptions ,
                              kTXNTextEditStyleFrameType,
                              kTXNTextensionFile,
                              kTXNSystemDefaultEncoding,
                              &m_txn, &m_txnFrameID, NULL ) );

#ifdef __WXMAC_OSX__
    TXNRegisterScrollInfoProc( m_txn, gTXNScrollInfoProc, (SInt32) this);
#endif

    SetGWorld( origPort , origDev ) ;
    return err;
}

// ----------------------------------------------------------------------------
// MLTE control implementation (OSX part)
// ----------------------------------------------------------------------------

#if TARGET_API_MAC_OSX

#if MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_2

wxMacMLTEHIViewControl::wxMacMLTEHIViewControl( wxTextCtrl *wxPeer,
                         const wxString& str,
                         const wxPoint& pos,
                         const wxSize& size, long style ) : wxMacMLTEControl( wxPeer )
{
    m_font = wxPeer->GetFont() ;
    m_windowStyle = style ;
    Rect bounds = wxMacGetBoundsForControl( wxPeer , pos , size ) ;
    wxString st = str ;
    wxMacConvertNewlines10To13( &st ) ;

    HIRect hr = { bounds.left , bounds.top , bounds.right - bounds.left , bounds.bottom- bounds.top } ;

    m_scrollView = NULL ;
    TXNFrameOptions frameOptions = FrameOptionsFromWXStyle( style ) ;
    if ( frameOptions & (kTXNWantVScrollBarMask|kTXNWantHScrollBarMask) )
    {
        HIScrollViewCreate(( frameOptions & kTXNWantHScrollBarMask ? kHIScrollViewOptionsHorizScroll : 0) |
            ( frameOptions & kTXNWantVScrollBarMask ? kHIScrollViewOptionsVertScroll: 0 ) , &m_scrollView ) ;

        HIViewSetFrame( m_scrollView, &hr );
        HIViewSetVisible( m_scrollView, true );
    }

    m_textView = NULL ;
    HITextViewCreate( NULL , 0, frameOptions , &m_textView ) ;
    m_txn = HITextViewGetTXNObject( m_textView) ;
    HIViewSetVisible( m_textView , true ) ;
    if ( m_scrollView )
    {
        HIViewAddSubview( m_scrollView , m_textView ) ;
        m_controlRef = m_scrollView ;
        wxPeer->MacInstallEventHandler( (WXWidget) m_textView  ) ;
    }
    else
    {
        HIViewSetFrame( m_textView, &hr );
        m_controlRef = m_textView ;
    }

    AdjustCreationAttributes( *wxWHITE , true ) ;

    wxMacWindowClipper c( m_peer ) ;
    SetTXNData( st , kTXNStartOffset, kTXNEndOffset ) ;

    TXNSetSelection( m_txn, 0, 0);
    TXNShowSelection( m_txn, kTXNShowStart);

}

OSStatus wxMacMLTEHIViewControl::SetFocus( ControlFocusPart focusPart )
{
    return SetKeyboardFocus(  GetControlOwner( m_textView )  ,
        m_textView , focusPart ) ;
}

bool wxMacMLTEHIViewControl::HasFocus() const
{
    ControlRef control ;
    GetKeyboardFocus( GetUserFocusWindow() , &control ) ;
    return control == m_textView ;
}

#endif // MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_2


#endif

#endif // wxUSE_TEXTCTRL