155 lines
3.5 KiB
C
155 lines
3.5 KiB
C
/* Public Domain Curses */
|
|
|
|
#include <curspriv.h>
|
|
|
|
RCSID("$Id: clear.c,v 1.35 2008/07/13 16:08:18 wmcbrine Exp $")
|
|
|
|
/*man-start**************************************************************
|
|
|
|
Name: clear
|
|
|
|
Synopsis:
|
|
int clear(void);
|
|
int wclear(WINDOW *win);
|
|
int erase(void);
|
|
int werase(WINDOW *win);
|
|
int clrtobot(void);
|
|
int wclrtobot(WINDOW *win);
|
|
int clrtoeol(void);
|
|
int wclrtoeol(WINDOW *win);
|
|
|
|
Description:
|
|
erase() and werase() copy blanks (i.e. the background chtype) to
|
|
every cell of the window.
|
|
|
|
clear() and wclear() are similar to erase() and werase(), but
|
|
they also call clearok() to ensure that the window is
|
|
cleared on the next wrefresh().
|
|
|
|
clrtobot() and wclrtobot() clear the window from the current
|
|
cursor position to the end of the window.
|
|
|
|
clrtoeol() and wclrtoeol() clear the window from the current
|
|
cursor position to the end of the current line.
|
|
|
|
Return Value:
|
|
All functions return OK on success and ERR on error.
|
|
|
|
Portability X/Open BSD SYS V
|
|
clear Y Y Y
|
|
wclear Y Y Y
|
|
erase Y Y Y
|
|
werase Y Y Y
|
|
clrtobot Y Y Y
|
|
wclrtobot Y Y Y
|
|
clrtoeol Y Y Y
|
|
wclrtoeol Y Y Y
|
|
|
|
**man-end****************************************************************/
|
|
|
|
int wclrtoeol(WINDOW *win)
|
|
{
|
|
int x, y, minx;
|
|
chtype blank, *ptr;
|
|
|
|
PDC_LOG(("wclrtoeol() - called: Row: %d Col: %d\n",
|
|
win->_cury, win->_curx));
|
|
|
|
if (!win)
|
|
return ERR;
|
|
|
|
y = win->_cury;
|
|
x = win->_curx;
|
|
|
|
/* wrs (4/10/93) account for window background */
|
|
|
|
blank = win->_bkgd;
|
|
|
|
for (minx = x, ptr = &win->_y[y][x]; minx < win->_maxx; minx++, ptr++)
|
|
*ptr = blank;
|
|
|
|
if (x < win->_firstch[y] || win->_firstch[y] == _NO_CHANGE)
|
|
win->_firstch[y] = x;
|
|
|
|
win->_lastch[y] = win->_maxx - 1;
|
|
|
|
PDC_sync(win);
|
|
return OK;
|
|
}
|
|
|
|
int clrtoeol(void)
|
|
{
|
|
PDC_LOG(("clrtoeol() - called\n"));
|
|
|
|
return wclrtoeol(stdscr);
|
|
}
|
|
|
|
int wclrtobot(WINDOW *win)
|
|
{
|
|
PDC_LOG(("wclrtobot() - called\n"));
|
|
|
|
if (!win)
|
|
return ERR;
|
|
|
|
int savey = win->_cury;
|
|
int savex = win->_curx;
|
|
|
|
/* should this involve scrolling region somehow ? */
|
|
|
|
if (win->_cury + 1 < win->_maxy)
|
|
{
|
|
win->_curx = 0;
|
|
win->_cury++;
|
|
for (; win->_maxy > win->_cury; win->_cury++)
|
|
wclrtoeol(win);
|
|
win->_cury = savey;
|
|
win->_curx = savex;
|
|
}
|
|
wclrtoeol(win);
|
|
|
|
PDC_sync(win);
|
|
return OK;
|
|
}
|
|
|
|
int clrtobot(void)
|
|
{
|
|
PDC_LOG(("clrtobot() - called\n"));
|
|
|
|
return wclrtobot(stdscr);
|
|
}
|
|
|
|
int werase(WINDOW *win)
|
|
{
|
|
PDC_LOG(("werase() - called\n"));
|
|
|
|
if (wmove(win, 0, 0) == ERR)
|
|
return ERR;
|
|
|
|
return wclrtobot(win);
|
|
}
|
|
|
|
int erase(void)
|
|
{
|
|
PDC_LOG(("erase() - called\n"));
|
|
|
|
return werase(stdscr);
|
|
}
|
|
|
|
int wclear(WINDOW *win)
|
|
{
|
|
PDC_LOG(("wclear() - called\n"));
|
|
|
|
if (!win)
|
|
return ERR;
|
|
|
|
win->_clear = TRUE;
|
|
return werase(win);
|
|
}
|
|
|
|
int clear(void)
|
|
{
|
|
PDC_LOG(("clear() - called\n"));
|
|
|
|
return wclear(stdscr);
|
|
}
|