/* 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; }