| /* 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); |
| } |