3b77b723ca
PDCurses provides an alternative implementation of the curses library standard in addition to tinycurses. Where tinycurses is really tiny, PDCurses is more complete and provides virtually unlimited windows and the full API. The PDCurses code is brought in "vanilla", with all local changes residing in curses/pdcurses-backend/ In addition to a curses library, this change also provides libpanel (as part of the PDCurses code), and libform and libmenu which were derived from ncurses-5.9. As they rely on ncurses internals (and PDCurses is not ncurses), more changes were required for these libraries to work. The build system is extended to install the right set of header files depending on the selected curses implementation. Change-Id: I9e5b920f94b6510da01da2f656196a993170d1c5 Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com> Reviewed-on: http://review.coreboot.org/106 Tested-by: build bot (Jenkins) Reviewed-by: Marc Jones <marcj303@gmail.com>
276 lines
7.6 KiB
C
276 lines
7.6 KiB
C
/* Public Domain Curses */
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#include <curspriv.h>
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RCSID("$Id: refresh.c,v 1.56 2008/07/13 16:08:18 wmcbrine Exp $")
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/*man-start**************************************************************
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Name: refresh
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Synopsis:
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int refresh(void);
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int wrefresh(WINDOW *win);
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int wnoutrefresh(WINDOW *win);
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int doupdate(void);
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int redrawwin(WINDOW *win);
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int wredrawln(WINDOW *win, int beg_line, int num_lines);
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Description:
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wrefresh() copies the named window to the physical terminal
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screen, taking into account what is already there in order to
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optimize cursor movement. refresh() does the same, using stdscr.
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These routines must be called to get any output on the terminal,
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as other routines only manipulate data structures. Unless
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leaveok() has been enabled, the physical cursor of the terminal
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is left at the location of the window's cursor.
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wnoutrefresh() and doupdate() allow multiple updates with more
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efficiency than wrefresh() alone. wrefresh() works by first
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calling wnoutrefresh(), which copies the named window to the
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virtual screen. It then calls doupdate(), which compares the
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virtual screen to the physical screen and does the actual
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update. A series of calls to wrefresh() will result in
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alternating calls to wnoutrefresh() and doupdate(), causing
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several bursts of output to the screen. By first calling
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wnoutrefresh() for each window, it is then possible to call
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doupdate() only once.
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In PDCurses, redrawwin() is equivalent to touchwin(), and
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wredrawln() is the same as touchline(). In some other curses
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implementations, there's a subtle distinction, but it has no
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meaning in PDCurses.
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Return Value:
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All functions return OK on success and ERR on error.
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Portability X/Open BSD SYS V
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refresh Y Y Y
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wrefresh Y Y Y
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wnoutrefresh Y Y Y
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doupdate Y Y Y
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redrawwin Y - 4.0
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wredrawln Y - 4.0
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**man-end****************************************************************/
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#include <string.h>
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int wnoutrefresh(WINDOW *win)
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{
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int begy, begx; /* window's place on screen */
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int i, j;
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PDC_LOG(("wnoutrefresh() - called: win=%p\n", win));
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if ( !win || (win->_flags & (_PAD|_SUBPAD)) )
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return ERR;
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begy = win->_begy;
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begx = win->_begx;
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for (i = 0, j = begy; i < win->_maxy; i++, j++)
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{
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if (win->_firstch[i] != _NO_CHANGE)
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{
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chtype *src = win->_y[i];
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chtype *dest = curscr->_y[j] + begx;
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int first = win->_firstch[i]; /* first changed */
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int last = win->_lastch[i]; /* last changed */
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/* ignore areas on the outside that are marked as changed,
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but really aren't */
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while (first <= last && src[first] == dest[first])
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first++;
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while (last >= first && src[last] == dest[last])
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last--;
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/* if any have really changed... */
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if (first <= last)
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{
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memcpy(dest + first, src + first,
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(last - first + 1) * sizeof(chtype));
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first += begx;
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last += begx;
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if (first < curscr->_firstch[j] ||
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curscr->_firstch[j] == _NO_CHANGE)
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curscr->_firstch[j] = first;
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if (last > curscr->_lastch[j])
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curscr->_lastch[j] = last;
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}
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win->_firstch[i] = _NO_CHANGE; /* updated now */
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}
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win->_lastch[i] = _NO_CHANGE; /* updated now */
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}
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if (win->_clear)
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win->_clear = FALSE;
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if (!win->_leaveit)
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{
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curscr->_cury = win->_cury + begy;
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curscr->_curx = win->_curx + begx;
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}
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return OK;
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}
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int doupdate(void)
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{
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int y;
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bool clearall;
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PDC_LOG(("doupdate() - called\n"));
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if (!curscr)
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return ERR;
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if (isendwin()) /* coming back after endwin() called */
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{
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reset_prog_mode();
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clearall = TRUE;
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SP->alive = TRUE; /* so isendwin() result is correct */
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}
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else
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clearall = curscr->_clear;
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for (y = 0; y < SP->lines; y++)
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{
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PDC_LOG(("doupdate() - Transforming line %d of %d: %s\n",
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y, SP->lines, (curscr->_firstch[y] != _NO_CHANGE) ?
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"Yes" : "No"));
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if (clearall || curscr->_firstch[y] != _NO_CHANGE)
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{
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int first, last;
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chtype *src = curscr->_y[y];
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chtype *dest = pdc_lastscr->_y[y];
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if (clearall)
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{
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first = 0;
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last = COLS - 1;
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}
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else
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{
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first = curscr->_firstch[y];
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last = curscr->_lastch[y];
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}
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while (first <= last)
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{
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int len = 0;
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/* build up a run of changed cells; if two runs are
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separated by a single unchanged cell, ignore the
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break */
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if (clearall)
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len = last - first + 1;
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else
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while (first + len <= last &&
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(src[first + len] != dest[first + len] ||
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(len && first + len < last &&
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src[first + len + 1] != dest[first + len + 1])
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)
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)
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len++;
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/* update the screen, and pdc_lastscr */
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if (len)
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{
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PDC_transform_line(y, first, len, src + first);
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memcpy(dest + first, src + first, len * sizeof(chtype));
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first += len;
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}
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/* skip over runs of unchanged cells */
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while (first <= last && src[first] == dest[first])
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first++;
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}
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curscr->_firstch[y] = _NO_CHANGE;
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curscr->_lastch[y] = _NO_CHANGE;
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}
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}
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curscr->_clear = FALSE;
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if (SP->visibility)
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PDC_gotoyx(curscr->_cury, curscr->_curx);
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SP->cursrow = curscr->_cury;
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SP->curscol = curscr->_curx;
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return OK;
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}
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int wrefresh(WINDOW *win)
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{
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bool save_clear;
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PDC_LOG(("wrefresh() - called\n"));
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if ( !win || (win->_flags & (_PAD|_SUBPAD)) )
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return ERR;
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save_clear = win->_clear;
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if (win == curscr)
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curscr->_clear = TRUE;
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else
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wnoutrefresh(win);
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if (save_clear && win->_maxy == SP->lines && win->_maxx == SP->cols)
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curscr->_clear = TRUE;
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return doupdate();
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}
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int refresh(void)
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{
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PDC_LOG(("refresh() - called\n"));
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return wrefresh(stdscr);
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}
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int wredrawln(WINDOW *win, int start, int num)
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{
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int i;
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PDC_LOG(("wredrawln() - called: win=%p start=%d num=%d\n",
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win, start, num));
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if (!win || start > win->_maxy || start + num > win->_maxy)
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return ERR;
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for (i = start; i < start + num; i++)
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{
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win->_firstch[i] = 0;
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win->_lastch[i] = win->_maxx - 1;
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}
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return OK;
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}
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int redrawwin(WINDOW *win)
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{
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PDC_LOG(("redrawwin() - called: win=%p\n", win));
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if (!win)
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return ERR;
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return wredrawln(win, 0, win->_maxy);
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}
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