--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/pdcurses/touch.c Sat Jan 09 17:41:21 2016 +0200
@@ -0,0 +1,160 @@
+/* Public Domain Curses */
+
+#include <curspriv.h>
+
+RCSID("$Id: touch.c,v 1.29 2008/07/13 16:08:18 wmcbrine Exp $")
+
+/*man-start**************************************************************
+
+ Name: 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);
+
+ 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().
+
+ Return Value:
+ All functions return OK on success and ERR on error except
+ is_wintouched() and is_linetouched().
+
+ Portability X/Open BSD SYS V
+ touchwin Y Y Y
+ touchline Y - 3.0
+ untouchwin Y - 4.0
+ wtouchln Y Y Y
+ is_linetouched Y - 4.0
+ is_wintouched Y - 4.0
+
+**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;
+}