Category : C++ Source Code
Archive   : C_ALL.ZIP
Filename : TI1021.ASC

PRODUCT : Borland C++ NUMBER : 1021
VERSION : 3.1
OS : DOS
DATE : October 23, 1992 PAGE : 1/2

TITLE : How to extract text from a TEditor Buffer.




//
// This document shows how to copy the contents of an editor
// buffer into a separate data area, assuming you have a pointer
// to an editor.
//
// For more information on how these calculations were obtained,
// see the first few pages of the TEditor object documentation in
// the Class Reference section in the Turbo Vision User's Guide.
//

//
// unsigned edDataSize( TEditor *ed )
//
// This function returns the length of the current editor
// buffer. This is how much space would need to be available in
// order to copy the editor buffer to another location.
//

inline unsigned edDataSize( TEditor *ed )
{
return( ed->bufLen );
}

//
// void edGetData( TEditor *ed, char *dest )
//
// This function copies the data from the editor buffer into
// the alternate buffer passed in. The alternate buffer must
// already have been allocated for at least as many bytes as
// edDataSize() returns.
//

void edGetData( TEditor *ed, char *dest )
{
// Copy from beginning of buffer up to cursor.
memcpy( dest, ed->buffer, ed->curPtr );

// Copy from end of gap through to end of buffer.
memcpy( dest + ed->curPtr,
ed->buffer + ed->curPtr + ed->gapLen,
ed->bufLen - ed->curPtr
);
}













PRODUCT : Borland C++ NUMBER : 1021
VERSION : 3.1
OS : DOS
DATE : October 23, 1992 PAGE : 2/2

TITLE : How to extract text from a TEditor Buffer.




//
// char *copyEditor()
//
// This function assumes that the current selected deskTop
// window is a TEditWindow, extracts the editor from the
// TEditWindow and copies the current editor buffer into an
// extra buffer that has been allocated for this purpose. It
// is intended to demonstrate how one might use the functions
// that are
//

char *TTestApp::copyEditor()
{
TFileEditor *ed = (TFileEditor *)
((TEditWindow *) TProgram::deskTop->current )->editor;

unsigned len = edDataSize( ed );
char *buf = new char [ len + 1]; // Allocate buffer for data
if( buf != NULL )
edGetData( ed, buf ); // Copy data from editor to
// buffer.
buf[ len ] = '\0';
return buf;
}


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