277 lines
7.6 KiB
C
277 lines
7.6 KiB
C
/* Public Domain Curses */
|
|
|
|
#include <curspriv.h>
|
|
|
|
RCSID("$Id: refresh.c,v 1.56 2008/07/13 16:08:18 wmcbrine Exp $")
|
|
|
|
/*man-start**************************************************************
|
|
|
|
Name: refresh
|
|
|
|
Synopsis:
|
|
int refresh(void);
|
|
int wrefresh(WINDOW *win);
|
|
int wnoutrefresh(WINDOW *win);
|
|
int doupdate(void);
|
|
int redrawwin(WINDOW *win);
|
|
int wredrawln(WINDOW *win, int beg_line, int num_lines);
|
|
|
|
Description:
|
|
wrefresh() copies the named window to the physical terminal
|
|
screen, taking into account what is already there in order to
|
|
optimize cursor movement. refresh() does the same, using stdscr.
|
|
These routines must be called to get any output on the terminal,
|
|
as other routines only manipulate data structures. Unless
|
|
leaveok() has been enabled, the physical cursor of the terminal
|
|
is left at the location of the window's cursor.
|
|
|
|
wnoutrefresh() and doupdate() allow multiple updates with more
|
|
efficiency than wrefresh() alone. wrefresh() works by first
|
|
calling wnoutrefresh(), which copies the named window to the
|
|
virtual screen. It then calls doupdate(), which compares the
|
|
virtual screen to the physical screen and does the actual
|
|
update. A series of calls to wrefresh() will result in
|
|
alternating calls to wnoutrefresh() and doupdate(), causing
|
|
several bursts of output to the screen. By first calling
|
|
wnoutrefresh() for each window, it is then possible to call
|
|
doupdate() only once.
|
|
|
|
In PDCurses, redrawwin() is equivalent to touchwin(), and
|
|
wredrawln() is the same as touchline(). In some other curses
|
|
implementations, there's a subtle distinction, but it has no
|
|
meaning in PDCurses.
|
|
|
|
Return Value:
|
|
All functions return OK on success and ERR on error.
|
|
|
|
Portability X/Open BSD SYS V
|
|
refresh Y Y Y
|
|
wrefresh Y Y Y
|
|
wnoutrefresh Y Y Y
|
|
doupdate Y Y Y
|
|
redrawwin Y - 4.0
|
|
wredrawln Y - 4.0
|
|
|
|
**man-end****************************************************************/
|
|
|
|
#include <string.h>
|
|
|
|
int wnoutrefresh(WINDOW *win)
|
|
{
|
|
int begy, begx; /* window's place on screen */
|
|
int i, j;
|
|
|
|
PDC_LOG(("wnoutrefresh() - called: win=%p\n", win));
|
|
|
|
if ( !win || (win->_flags & (_PAD|_SUBPAD)) )
|
|
return ERR;
|
|
|
|
begy = win->_begy;
|
|
begx = win->_begx;
|
|
|
|
for (i = 0, j = begy; i < win->_maxy; i++, j++)
|
|
{
|
|
if (win->_firstch[i] != _NO_CHANGE)
|
|
{
|
|
chtype *src = win->_y[i];
|
|
chtype *dest = curscr->_y[j] + begx;
|
|
|
|
int first = win->_firstch[i]; /* first changed */
|
|
int last = win->_lastch[i]; /* last changed */
|
|
|
|
/* ignore areas on the outside that are marked as changed,
|
|
but really aren't */
|
|
|
|
while (first <= last && src[first] == dest[first])
|
|
first++;
|
|
|
|
while (last >= first && src[last] == dest[last])
|
|
last--;
|
|
|
|
/* if any have really changed... */
|
|
|
|
if (first <= last)
|
|
{
|
|
memcpy(dest + first, src + first,
|
|
(last - first + 1) * sizeof(chtype));
|
|
|
|
first += begx;
|
|
last += begx;
|
|
|
|
if (first < curscr->_firstch[j] ||
|
|
curscr->_firstch[j] == _NO_CHANGE)
|
|
curscr->_firstch[j] = first;
|
|
|
|
if (last > curscr->_lastch[j])
|
|
curscr->_lastch[j] = last;
|
|
}
|
|
|
|
win->_firstch[i] = _NO_CHANGE; /* updated now */
|
|
}
|
|
|
|
win->_lastch[i] = _NO_CHANGE; /* updated now */
|
|
}
|
|
|
|
if (win->_clear)
|
|
win->_clear = FALSE;
|
|
|
|
if (!win->_leaveit)
|
|
{
|
|
curscr->_cury = win->_cury + begy;
|
|
curscr->_curx = win->_curx + begx;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
int doupdate(void)
|
|
{
|
|
int y;
|
|
bool clearall;
|
|
|
|
PDC_LOG(("doupdate() - called\n"));
|
|
|
|
if (!curscr)
|
|
return ERR;
|
|
|
|
if (isendwin()) /* coming back after endwin() called */
|
|
{
|
|
reset_prog_mode();
|
|
clearall = TRUE;
|
|
SP->alive = TRUE; /* so isendwin() result is correct */
|
|
}
|
|
else
|
|
clearall = curscr->_clear;
|
|
|
|
for (y = 0; y < SP->lines; y++)
|
|
{
|
|
PDC_LOG(("doupdate() - Transforming line %d of %d: %s\n",
|
|
y, SP->lines, (curscr->_firstch[y] != _NO_CHANGE) ?
|
|
"Yes" : "No"));
|
|
|
|
if (clearall || curscr->_firstch[y] != _NO_CHANGE)
|
|
{
|
|
int first, last;
|
|
|
|
chtype *src = curscr->_y[y];
|
|
chtype *dest = pdc_lastscr->_y[y];
|
|
|
|
if (clearall)
|
|
{
|
|
first = 0;
|
|
last = COLS - 1;
|
|
}
|
|
else
|
|
{
|
|
first = curscr->_firstch[y];
|
|
last = curscr->_lastch[y];
|
|
}
|
|
|
|
while (first <= last)
|
|
{
|
|
int len = 0;
|
|
|
|
/* build up a run of changed cells; if two runs are
|
|
separated by a single unchanged cell, ignore the
|
|
break */
|
|
|
|
if (clearall)
|
|
len = last - first + 1;
|
|
else
|
|
while (first + len <= last &&
|
|
(src[first + len] != dest[first + len] ||
|
|
(len && first + len < last &&
|
|
src[first + len + 1] != dest[first + len + 1])
|
|
)
|
|
)
|
|
len++;
|
|
|
|
/* update the screen, and pdc_lastscr */
|
|
|
|
if (len)
|
|
{
|
|
PDC_transform_line(y, first, len, src + first);
|
|
memcpy(dest + first, src + first, len * sizeof(chtype));
|
|
first += len;
|
|
}
|
|
|
|
/* skip over runs of unchanged cells */
|
|
|
|
while (first <= last && src[first] == dest[first])
|
|
first++;
|
|
}
|
|
|
|
curscr->_firstch[y] = _NO_CHANGE;
|
|
curscr->_lastch[y] = _NO_CHANGE;
|
|
}
|
|
}
|
|
|
|
curscr->_clear = FALSE;
|
|
|
|
if (SP->visibility)
|
|
PDC_gotoyx(curscr->_cury, curscr->_curx);
|
|
|
|
SP->cursrow = curscr->_cury;
|
|
SP->curscol = curscr->_curx;
|
|
|
|
return OK;
|
|
}
|
|
|
|
int wrefresh(WINDOW *win)
|
|
{
|
|
bool save_clear;
|
|
|
|
PDC_LOG(("wrefresh() - called\n"));
|
|
|
|
if ( !win || (win->_flags & (_PAD|_SUBPAD)) )
|
|
return ERR;
|
|
|
|
save_clear = win->_clear;
|
|
|
|
if (win == curscr)
|
|
curscr->_clear = TRUE;
|
|
else
|
|
wnoutrefresh(win);
|
|
|
|
if (save_clear && win->_maxy == SP->lines && win->_maxx == SP->cols)
|
|
curscr->_clear = TRUE;
|
|
|
|
return doupdate();
|
|
}
|
|
|
|
int refresh(void)
|
|
{
|
|
PDC_LOG(("refresh() - called\n"));
|
|
|
|
return wrefresh(stdscr);
|
|
}
|
|
|
|
int wredrawln(WINDOW *win, int start, int num)
|
|
{
|
|
int i;
|
|
|
|
PDC_LOG(("wredrawln() - called: win=%p start=%d num=%d\n",
|
|
win, start, num));
|
|
|
|
if (!win || start > win->_maxy || start + num > win->_maxy)
|
|
return ERR;
|
|
|
|
for (i = start; i < start + num; i++)
|
|
{
|
|
win->_firstch[i] = 0;
|
|
win->_lastch[i] = win->_maxx - 1;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
int redrawwin(WINDOW *win)
|
|
{
|
|
PDC_LOG(("redrawwin() - called: win=%p\n", win));
|
|
|
|
if (!win)
|
|
return ERR;
|
|
|
|
return wredrawln(win, 0, win->_maxy);
|
|
}
|