215 lines
5.8 KiB
C
215 lines
5.8 KiB
C
/* PDCurses */
|
|
|
|
#include <curspriv.h>
|
|
|
|
/*man-start**************************************************************
|
|
|
|
overlay
|
|
-------
|
|
|
|
### Synopsis
|
|
|
|
int overlay(const WINDOW *src_w, WINDOW *dst_w)
|
|
int overwrite(const WINDOW *src_w, WINDOW *dst_w)
|
|
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)
|
|
|
|
### Description
|
|
|
|
overlay() and overwrite() copy all the text from src_w into dst_w.
|
|
The windows need not be the same size. Those characters in the source
|
|
window that intersect with the destination window are copied, so that
|
|
the characters appear in the same physical position on the screen.
|
|
The difference between the two functions is that overlay() is non-
|
|
destructive (blanks are not copied) while overwrite() is destructive
|
|
(blanks are copied).
|
|
|
|
copywin() is similar, but doesn't require that the two windows
|
|
overlap. The arguments src_tc and src_tr specify the top left corner
|
|
of the region to be copied. dst_tc, dst_tr, dst_br, and dst_bc
|
|
specify the region within the destination window to copy to. The
|
|
argument "overlay", if TRUE, indicates that the copy is done non-
|
|
destructively (as in overlay()); blanks in the source window are not
|
|
copied to the destination window. When overlay is FALSE, blanks are
|
|
copied.
|
|
|
|
### Return Value
|
|
|
|
All functions return OK on success and ERR on error.
|
|
|
|
### Portability
|
|
X/Open ncurses NetBSD
|
|
overlay Y Y Y
|
|
overwrite Y Y Y
|
|
copywin Y Y Y
|
|
|
|
**man-end****************************************************************/
|
|
|
|
/* Thanks to Andreas Otte <venn@@uni-paderborn.de> for the
|
|
corrected overlay()/overwrite() behavior. */
|
|
|
|
static int _copy_win(const WINDOW *src_w, WINDOW *dst_w, int src_tr,
|
|
int src_tc, int src_br, int src_bc, int dst_tr,
|
|
int dst_tc, bool _overlay)
|
|
{
|
|
int col, line, y1, fc, *minchng, *maxchng;
|
|
chtype *w1ptr, *w2ptr;
|
|
|
|
int lc = 0;
|
|
int xdiff = src_bc - src_tc;
|
|
int ydiff = src_br - src_tr;
|
|
|
|
if (!src_w || !dst_w)
|
|
return ERR;
|
|
|
|
minchng = dst_w->_firstch;
|
|
maxchng = dst_w->_lastch;
|
|
|
|
for (y1 = 0; y1 < dst_tr; y1++)
|
|
{
|
|
minchng++;
|
|
maxchng++;
|
|
}
|
|
|
|
for (line = 0; line < ydiff; line++)
|
|
{
|
|
w1ptr = src_w->_y[line + src_tr] + src_tc;
|
|
w2ptr = dst_w->_y[line + dst_tr] + dst_tc;
|
|
|
|
fc = _NO_CHANGE;
|
|
|
|
for (col = 0; col < xdiff; col++)
|
|
{
|
|
if ((*w1ptr) != (*w2ptr) &&
|
|
!((*w1ptr & A_CHARTEXT) == ' ' && _overlay))
|
|
{
|
|
*w2ptr = *w1ptr;
|
|
|
|
if (fc == _NO_CHANGE)
|
|
fc = col + dst_tc;
|
|
|
|
lc = col + dst_tc;
|
|
}
|
|
|
|
w1ptr++;
|
|
w2ptr++;
|
|
}
|
|
|
|
if (*minchng == _NO_CHANGE)
|
|
{
|
|
*minchng = fc;
|
|
*maxchng = lc;
|
|
}
|
|
else if (fc != _NO_CHANGE)
|
|
{
|
|
if (fc < *minchng)
|
|
*minchng = fc;
|
|
if (lc > *maxchng)
|
|
*maxchng = lc;
|
|
}
|
|
|
|
minchng++;
|
|
maxchng++;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
int _copy_overlap(const WINDOW *src_w, WINDOW *dst_w, bool overlay)
|
|
{
|
|
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 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, overlay);
|
|
}
|
|
|
|
int overlay(const WINDOW *src_w, WINDOW *dst_w)
|
|
{
|
|
PDC_LOG(("overlay() - called\n"));
|
|
|
|
return _copy_overlap(src_w, dst_w, TRUE);
|
|
}
|
|
|
|
int overwrite(const WINDOW *src_w, WINDOW *dst_w)
|
|
{
|
|
PDC_LOG(("overwrite() - called\n"));
|
|
|
|
return _copy_overlap(src_w, dst_w, FALSE);
|
|
}
|
|
|
|
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);
|
|
}
|