/* PDCurses */
#include <curspriv.h>
/*man-start**************************************************************
touch
-----
### Synopsis
int touchwin(WINDOW *win);
int touchline(WINDOW *win, int start, int count);
int untouchwin(WINDOW *win);
int wtouchln(WINDOW *win, int y, int n, int changed);
bool is_linetouched(WINDOW *win, int line);
bool is_wintouched(WINDOW *win);
int touchoverlap(const WINDOW *win1, WINDOW *win2);
### Description
touchwin() and touchline() throw away all information about which
parts of the window have been touched, pretending that the entire
window has been drawn on. This is sometimes necessary when using
overlapping windows, since a change to one window will affect the
other window, but the records of which lines have been changed in the
other window will not reflect the change.
untouchwin() marks all lines in the window as unchanged since the
last call to wrefresh().
wtouchln() makes n lines in the window, starting at line y, look as
if they have (changed == 1) or have not (changed == 0) been changed
since the last call to wrefresh().
is_linetouched() returns TRUE if the specified line in the specified
window has been changed since the last call to wrefresh().
is_wintouched() returns TRUE if the specified window has been changed
since the last call to wrefresh().
touchoverlap(win1, win2) marks the portion of win2 which overlaps
with win1 as modified.
### Return Value
All functions return OK on success and ERR on error except
is_wintouched() and is_linetouched().
### Portability
X/Open ncurses NetBSD
touchwin Y Y Y
touchline Y Y Y
untouchwin Y Y Y
wtouchln Y Y Y
is_linetouched Y Y Y
is_wintouched Y Y Y
touchoverlap - - Y
**man-end****************************************************************/
int touchwin(WINDOW *win)
{
int i;
PDC_LOG(("touchwin() - called: Win=%x\n", win));
if (!win)
return ERR;
for (i = 0; i < win->_maxy; i++)
{
win->_firstch[i] = 0;
win->_lastch[i] = win->_maxx - 1;
}
return OK;
}
int touchline(WINDOW *win, int start, int count)
{
int i;
PDC_LOG(("touchline() - called: win=%p start %d count %d\n",
win, start, count));
if (!win || start > win->_maxy || start + count > win->_maxy)
return ERR;
for (i = start; i < start + count; i++)
{
win->_firstch[i] = 0;
win->_lastch[i] = win->_maxx - 1;
}
return OK;
}
int untouchwin(WINDOW *win)
{
int i;
PDC_LOG(("untouchwin() - called: win=%p", win));
if (!win)
return ERR;
for (i = 0; i < win->_maxy; i++)
{
win->_firstch[i] = _NO_CHANGE;
win->_lastch[i] = _NO_CHANGE;
}
return OK;
}
int wtouchln(WINDOW *win, int y, int n, int changed)
{
int i;
PDC_LOG(("wtouchln() - called: win=%p y=%d n=%d changed=%d\n",
win, y, n, changed));
if (!win || y > win->_maxy || y + n > win->_maxy)
return ERR;
for (i = y; i < y + n; i++)
{
if (changed)
{
win->_firstch[i] = 0;
win->_lastch[i] = win->_maxx - 1;
}
else
{
win->_firstch[i] = _NO_CHANGE;
win->_lastch[i] = _NO_CHANGE;
}
}
return OK;
}
bool is_linetouched(WINDOW *win, int line)
{
PDC_LOG(("is_linetouched() - called: win=%p line=%d\n", win, line));
if (!win || line > win->_maxy || line < 0)
return FALSE;
return (win->_firstch[line] != _NO_CHANGE) ? TRUE : FALSE;
}
bool is_wintouched(WINDOW *win)
{
int i;
PDC_LOG(("is_wintouched() - called: win=%p\n", win));
if (win)
for (i = 0; i < win->_maxy; i++)
if (win->_firstch[i] != _NO_CHANGE)
return TRUE;
return FALSE;
}
int touchoverlap(const WINDOW *win1, WINDOW *win2)
{
int y, endy, endx, starty, startx;
PDC_LOG(("touchoverlap() - called: win1=%p win2=%p\n", win1, win2));
if (!win1 || !win2)
return ERR;
starty = max(win1->_begy, win2->_begy);
startx = max(win1->_begx, win2->_begx);
endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begy);
endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx);
if (starty >= endy || startx >= endx)
return OK;
starty -= win2->_begy;
startx -= win2->_begx;
endy -= win2->_begy;
endx -= win2->_begx;
endx -= 1;
for (y = starty; y < endy; y++)
{
win2->_firstch[y] = startx;
win2->_lastch[y] = endx;
}
return OK;
}