int copywin(const WINDOW *src_w, WINDOW *dst_w, int src_tr, int src_tc,
int dst_tr, int dst_tc, int dst_br, int dst_bc, int overlay)
{
int src_end_x, src_end_y;
int src_rows, src_cols, dst_rows, dst_cols;
int min_rows, min_cols;
PDC_LOG(("copywin() - called\n"));
if (!src_w || !dst_w || dst_w == curscr || dst_br > dst_w->_maxy
|| dst_bc > dst_w->_maxx || dst_tr < 0 || dst_tc < 0)
return ERR;
src_rows = src_w->_maxy - src_tr;
src_cols = src_w->_maxx - src_tc;
dst_rows = dst_br - dst_tr + 1;
dst_cols = dst_bc - dst_tc + 1;
min_rows = min(src_rows, dst_rows);
min_cols = min(src_cols, dst_cols);
src_end_y = src_tr + min_rows;
src_end_x = src_tc + min_cols;
return _copy_win(src_w, dst_w, src_tr, src_tc, src_end_y, src_end_x,
dst_tr, dst_tc, overlay);
}
//------------------------------------------------------------------------------
int copywin( const WINDOW* src_w, WINDOW* dst_w, int src_tr, int src_tc, int dst_tr, int dst_tc, int dst_br, int dst_bc, int overlay )
{
__QCS_FCONTEXT( "copywin" );
int src_end_x, src_end_y;
int src_rows, src_cols, dst_rows, dst_cols;
int min_rows, min_cols;
if( !src_w || !dst_w || dst_w == curscr || dst_br > dst_w->_maxy || dst_bc > dst_w->_maxx || dst_tr < 0 || dst_tc < 0 )
{
return ERR;
}
src_rows = src_w->_maxy - src_tr;
src_cols = src_w->_maxx - src_tc;
dst_rows = dst_br - dst_tr + 1;
dst_cols = dst_bc - dst_tc + 1;
min_rows = min( src_rows, dst_rows );
min_cols = min( src_cols, dst_cols );
src_end_y = src_tr + min_rows;
src_end_x = src_tc + min_cols;
return _copy_win( src_w, dst_w, src_tr, src_tc, src_end_y, src_end_x, dst_tr, dst_tc, overlay ) ? true : false;
}
//------------------------------------------------------------------------------
int overwrite( const WINDOW* src_w, WINDOW* dst_w )
{
__QCS_FCONTEXT( "overwrite" );
int first_line, first_col, last_line, last_col;
int src_start_x, src_start_y, dst_start_x, dst_start_y;
int xdiff, ydiff;
if( !src_w || !dst_w )
{
return ERR;
}
first_col = max( dst_w->_begx, src_w->_begx );
first_line = max( dst_w->_begy, src_w->_begy );
last_col = min( src_w->_begx + src_w->_maxx, dst_w->_begx + dst_w->_maxx );
last_line = min( src_w->_begy + src_w->_maxy, dst_w->_begy + dst_w->_maxy );
// determine the overlapping region of the two windows in real coordinates
// if no overlapping region, do nothing
if( ( last_col < first_col ) || ( last_line < first_line ) )
{
return 0;
}
// size of overlapping region
xdiff = last_col - first_col;
ydiff = last_line - first_line;
if( src_w->_begx <= dst_w->_begx )
{
src_start_x = dst_w->_begx - src_w->_begx;
dst_start_x = 0;
}
else
{
dst_start_x = src_w->_begx - dst_w->_begx;
src_start_x = 0;
}
if( src_w->_begy <= dst_w->_begy )
{
src_start_y = dst_w->_begy - src_w->_begy;
dst_start_y = 0;
}
else
{
dst_start_y = src_w->_begy - dst_w->_begy;
src_start_y = 0;
}
return _copy_win( src_w, dst_w, src_start_y, src_start_x, src_start_y + ydiff, src_start_x + xdiff, dst_start_y, dst_start_x, FALSE );
}
int overwrite(const WINDOW *src_w, WINDOW *dst_w)
{
int first_line, first_col, last_line, last_col;
int src_start_x, src_start_y, dst_start_x, dst_start_y;
int xdiff, ydiff;
PDC_LOG(("overwrite() - called\n"));
if (!src_w || !dst_w)
return ERR;
first_col = max(dst_w->_begx, src_w->_begx);
first_line = max(dst_w->_begy, src_w->_begy);
last_col = min(src_w->_begx + src_w->_maxx, dst_w->_begx + dst_w->_maxx);
last_line = min(src_w->_begy + src_w->_maxy, dst_w->_begy + dst_w->_maxy);
/* determine the overlapping region of the two windows in real
coordinates */
/* if no overlapping region, do nothing */
if ((last_col < first_col) || (last_line < first_line))
return OK;
/* size of overlapping region */
xdiff = last_col - first_col;
ydiff = last_line - first_line;
if (src_w->_begx <= dst_w->_begx)
{
src_start_x = dst_w->_begx - src_w->_begx;
dst_start_x = 0;
}
else
{
dst_start_x = src_w->_begx - dst_w->_begx;
src_start_x = 0;
}
if (src_w->_begy <= dst_w->_begy)
{
src_start_y = dst_w->_begy - src_w->_begy;
dst_start_y = 0;
}
else
{
dst_start_y = src_w->_begy - dst_w->_begy;
src_start_y = 0;
}
return _copy_win(src_w, dst_w, src_start_y, src_start_x,
src_start_y + ydiff, src_start_x + xdiff,
dst_start_y, dst_start_x, FALSE);
}
