corrected graying out, only to be executed when background is gray or white

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

/////////////////////////////////////////////////////////////////////////////
// Name:        clipbrd.cpp
// Purpose:     Clipboard functionality
// Author:      AUTHOR
// Modified by:
// Created:     ??/??/98
// RCS-ID:      $Id$
// Copyright:   (c) AUTHOR
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation
#pragma implementation "clipbrd.h"
#endif

#include "wx/app.h"
#include "wx/frame.h"
#include "wx/bitmap.h"
#include "wx/utils.h"
#include "wx/metafile.h"
#include "wx/clipbrd.h"
#include "wx/intl.h"

#define wxUSE_DATAOBJ 1

#include <string.h>

// the trace mask we use with wxLogTrace() - call
// wxLog::AddTraceMask(TRACE_CLIPBOARD) to enable the trace messages from here
// (there will be a *lot* of them!)
static const wxChar *TRACE_CLIPBOARD = _T("clipboard");

void *wxGetClipboardData(wxDataFormat dataFormat, long *len)
{
#if !TARGET_CARBON
	OSErr err = noErr ;
#else
	OSStatus err = noErr ;
#endif
  void * data = NULL ;
	
    switch (dataFormat.GetType())
    {
        case wxDF_OEMTEXT:
            dataFormat = wxDF_TEXT;
            // fall through

        case wxDF_TEXT:
                break;
        default:
            {
                wxLogError(_("Unsupported clipboard format."));
                return NULL;
            }
    }

#if TARGET_CARBON
  	ScrapRef scrapRef;
  	
  	err = GetCurrentScrap( &scrapRef );
  	if ( err != noTypeErr && err != memFullErr )	
  	{
  		ScrapFlavorFlags	flavorFlags;
  		Size				byteCount;
  		
  		if (( err = GetScrapFlavorFlags( scrapRef, dataFormat.GetFormatId(), &flavorFlags )) == noErr)
  		{
  			if (( err = GetScrapFlavorSize( scrapRef, dataFormat.GetFormatId(), &byteCount )) == noErr)
  			{
  			  if ( dataFormat.GetType() == wxDF_TEXT )
  			    byteCount++ ;
  			    
          data = new char[ byteCount ] ;
          if (( err = GetScrapFlavorData( scrapRef, dataFormat.GetFormatId(), &byteCount , data )) == noErr )
          {
            *len = byteCount ;
  			    if ( dataFormat.GetType() == wxDF_TEXT )  
  		        ((char*)data)[byteCount] = 0 ;
          }
          else
          {
            delete[] ((char *)data) ;
            data = NULL ;
          }
	   		}
  		}
  	}
	
#else
  	long offset ;
  	Handle datahandle = NewHandle(0) ;
  	HLock( datahandle ) ;
  	GetScrap( datahandle , dataFormat.GetFormatId() , &offset ) ;
  	HUnlock( datahandle ) ;
  	if ( GetHandleSize( datahandle ) > 0 )
  	{
  	  long byteCount = GetHandleSize( datahandle ) ;
  	  if ( dataFormat.GetType() == wxDF_TEXT )  
  	    data = new char[ byteCount + 1] ;
      else
        data = new char[ byteCount ] ;

  	  memcpy( (char*) data , (char*) *datahandle , byteCount ) ;
  	  if ( dataFormat.GetType() == wxDF_TEXT )  
  		  ((char*)data)[byteCount] = 0 ;
  	  * len = byteCount ;
  	}
  	DisposeHandle( datahandle ) ;
#endif
    if ( err )
    {
        wxLogSysError(_("Failed to get clipboard data."));

        return NULL ;
    }
    if ( dataFormat.GetType() == wxDF_TEXT && wxApp::s_macDefaultEncodingIsPC )
    {
      wxMacConvertToPC((char*)data) ;
    }
    return data;
}


/*
 * Generalized clipboard implementation by Matthew Flatt
 */

IMPLEMENT_DYNAMIC_CLASS(wxClipboard, wxClipboardBase)

wxClipboard::wxClipboard()
{
  m_open = false ;
  m_data = NULL ;
}

wxClipboard::~wxClipboard()
{
    if (m_data)
    {
        delete m_data;
        m_data = (wxDataObject*) NULL;
    }
}

void wxClipboard::Clear()
{
    if (m_data)
    {
        delete m_data;
        m_data = (wxDataObject*) NULL;
    }
#if TARGET_CARBON
	OSStatus err ;
	err = ClearCurrentScrap( );
#else
	OSErr err ;
	err = ZeroScrap( );
#endif
	if ( err )
	{
        wxLogSysError(_("Failed to empty the clipboard."));
	}
}

bool wxClipboard::Flush()
{
    return FALSE;
}

bool wxClipboard::Open()
{
    wxCHECK_MSG( !m_open, FALSE, wxT("clipboard already open") );
    m_open = true ;
    return true ;
}

bool wxClipboard::IsOpened() const
{
    return m_open;
}

bool wxClipboard::SetData( wxDataObject *data )
{
    wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );

    wxCHECK_MSG( data, FALSE, wxT("data is invalid") );

    Clear();

    return AddData( data );
}

bool wxClipboard::AddData( wxDataObject *data )
{
    wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );

    wxCHECK_MSG( data, FALSE, wxT("data is invalid") );

    wxDataFormat format = data->GetPreferredFormat();

    /* we can only store one wxDataObject */
    Clear();

    m_data = data;

    /* get formats from wxDataObjects */
    wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
    m_data->GetAllFormats( array );

    for (size_t i = 0; i < m_data->GetFormatCount(); i++)
    {
        wxLogTrace( TRACE_CLIPBOARD,
                    wxT("wxClipboard now supports atom %s"),
                    array[i].GetId().c_str() );

#if !TARGET_CARBON
	      OSErr err = noErr ;
#else
	      OSStatus err = noErr ;
#endif

       switch ( array[i].GetType() )
       {
           case wxDF_TEXT:
           case wxDF_OEMTEXT:
           {
               wxTextDataObject* textDataObject = (wxTextDataObject*) data;
               wxString str(textDataObject->GetText());
              	wxString mac ;
              	if ( wxApp::s_macDefaultEncodingIsPC )
              	{
              		mac = wxMacMakeMacStringFromPC(textDataObject->GetText()) ;
              	}
              	else
              	{
              		mac = textDataObject->GetText() ;
              	}
        #if !TARGET_CARBON
        				err = PutScrap( mac.Length() , 'TEXT' , mac.c_str() ) ;
        #else
        				ScrapRef	scrap;
        				err = GetCurrentScrap (&scrap); 
        				if ( !err )
        				{
        					err = PutScrapFlavor (scrap, 'TEXT', 0, mac.Length(), mac.c_str());
        				}
        #endif
           }

#if wxUSE_DRAG_AND_DROP
        case wxDF_METAFILE:
           {
              wxMetafileDataObject* metaFileDataObject =
                (wxMetafileDataObject*) data;
              wxMetafile metaFile = metaFileDataObject->GetMetafile();
      				PicHandle pict = metaFile.GetHMETAFILE() ;
      				HLock( (Handle) pict ) ;
      #if !TARGET_CARBON
      				err = PutScrap( GetHandleSize(  (Handle) pict ) , 'PICT' , *pict ) ;
      #else
      				ScrapRef	scrap;
      				err = GetCurrentScrap (&scrap); 
      				if ( !err )
      				{
      					err = PutScrapFlavor (scrap, 'PICT', 0, GetHandleSize((Handle) pict), *pict);
      				}
      #endif
      				HUnlock(  (Handle) pict ) ;
           }
#endif
           case wxDF_BITMAP:
           case wxDF_DIB:
           default:
      			break ;
       }

    }

    delete[] array;

    return true ;
}

void wxClipboard::Close()
{
    m_open = false ;
}

bool wxClipboard::IsSupported( const wxDataFormat &dataFormat )
{
  if ( m_data )
  {
    return m_data->IsSupported( dataFormat ) ;
  }
#if TARGET_CARBON
	OSStatus err = noErr;
	ScrapRef scrapRef;
	
	err = GetCurrentScrap( &scrapRef );
	if ( err != noTypeErr && err != memFullErr )	
	{
		ScrapFlavorFlags	flavorFlags;
		Size				byteCount;
		
		if (( err = GetScrapFlavorFlags( scrapRef, dataFormat.GetFormatId(), &flavorFlags )) == noErr)
		{
			if (( err = GetScrapFlavorSize( scrapRef, dataFormat.GetFormatId(), &byteCount )) == noErr)
			{
				return TRUE ;
			}
		}
	}
	return FALSE;
	
#else
	long offset ;
	Handle datahandle = NewHandle(0) ;
	HLock( datahandle ) ;
	GetScrap( datahandle , dataFormat.GetFormatId() , &offset ) ;
	HUnlock( datahandle ) ;
	bool hasData = GetHandleSize( datahandle ) > 0 ;
	DisposeHandle( datahandle ) ;
	return hasData ;
#endif
}

bool wxClipboard::GetData( wxDataObject& data )
{
    wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );

    int formatcount = data.GetFormatCount() + 1 ;
    wxDataFormat *array = new wxDataFormat[ formatcount  ];
    array[0] = data.GetPreferredFormat();
    data.GetAllFormats( &array[1] );

    bool transferred = false ;

    if ( m_data )
    {
      for (size_t i = 0; !transferred && i < formatcount ; i++)
      {
          wxDataFormat format = array[i] ;
          if ( m_data->IsSupported( format ) ) 
          {
            int size = m_data->GetDataSize( format );
            transferred = true ;

            if (size == 0) 
            {
              data.SetData(format , 0 , 0 ) ;
            }
            else
            {
              char *d = new char[size];
              m_data->GetDataHere( format , (void*) d );
              data.SetData( format , size , d ) ;
              delete[] d ;
            }
          }
       }
    }
    /* get formats from wxDataObjects */
    if ( !transferred ) 
    {
      for (size_t i = 0; !transferred && i < formatcount ; i++)
      {
          wxDataFormat format = array[i] ;

          switch ( format.GetType() )
          {
              case wxDF_TEXT:
              case wxDF_OEMTEXT:
              {
                  long len ;
                  char* s = (char*)wxGetClipboardData(format, &len );
                  if ( s )
                  {
                    data.SetData( format , len , s ) ;
                    delete [] s;

                    transferred = true ;
                  }
              }
              default :
                break ;
          }
       }
    }

    delete[] array ;
    return transferred ;
}