/**************************************************************************** * Copyright (c) 1998-2001,2002 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the * * "Software"), to deal in the Software without restriction, including * * without limitation the rights to use, copy, modify, merge, publish, * * distribute, distribute with modifications, sublicense, and/or sell * * copies of the Software, and to permit persons to whom the Software is * * furnished to do so, subject to the following conditions: * * * * The above copyright notice and this permission notice shall be included * * in all copies or substantial portions of the Software. * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * * * Except as contained in this notice, the name(s) of the above copyright * * holders shall not be used in advertising or otherwise to promote the * * sale, use or other dealings in this Software without prior written * * authorization. * ****************************************************************************/ /**************************************************************************** * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * * and: Eric S. Raymond <esr@snark.thyrsus.com> * ****************************************************************************/ /* * lib_refresh.c * * The routines wrefresh() and wnoutrefresh(). * */ #include <curses.priv.h> MODULE_ID("$Id: lib_refresh.c,v 1.32 2002/05/26 00:17:04 tom Exp $") NCURSES_EXPORT(int) wrefresh(WINDOW *win) { int code; T((T_CALLED("wrefresh(%p)"), win)); if (win == curscr) { curscr->_clear = TRUE; code = doupdate(); } else if ((code = wnoutrefresh(win)) == OK) { if (win->_clear) newscr->_clear = TRUE; code = doupdate(); /* * Reset the clearok() flag in case it was set for the special * case in hardscroll.c (if we don't reset it here, we'll get 2 * refreshes because the flag is copied from stdscr to newscr). * Resetting the flag shouldn't do any harm, anyway. */ win->_clear = FALSE; } returnCode(code); } NCURSES_EXPORT(int) wnoutrefresh(WINDOW *win) { NCURSES_SIZE_T limit_x; NCURSES_SIZE_T i, j; NCURSES_SIZE_T begx; NCURSES_SIZE_T begy; NCURSES_SIZE_T m, n; #if USE_SCROLL_HINTS bool wide; #endif T((T_CALLED("wnoutrefresh(%p)"), win)); #ifdef TRACE if (_nc_tracing & TRACE_UPDATE) _tracedump("...win", win); #endif /* TRACE */ /* * This function will break badly if we try to refresh a pad. */ if ((win == 0) || (win->_flags & _ISPAD)) returnCode(ERR); /* put them here so "win == 0" won't break our code */ begx = win->_begx; begy = win->_begy; newscr->_nc_bkgd = win->_nc_bkgd; newscr->_attrs = win->_attrs; /* merge in change information from all subwindows of this window */ wsyncdown(win); #if USE_SCROLL_HINTS /* * For pure efficiency, we'd want to transfer scrolling information * from the window to newscr whenever the window is wide enough that * its update will dominate the cost of the update for the horizontal * band of newscr that it occupies. Unfortunately, this threshold * tends to be complex to estimate, and in any case scrolling the * whole band and rewriting the parts outside win's image would look * really ugly. So. What we do is consider the window "wide" if it * either (a) occupies the whole width of newscr, or (b) occupies * all but at most one column on either vertical edge of the screen * (this caters to fussy people who put boxes around full-screen * windows). Note that changing this formula will not break any code, * merely change the costs of various update cases. */ wide = (begx <= 1 && win->_maxx >= (newscr->_maxx - 1)); #endif win->_flags &= ~_HASMOVED; /* * Microtweaking alert! This double loop is one of the genuine * hot spots in the code. Even gcc doesn't seem to do enough * common-subexpression chunking to make it really tense, * so we'll force the issue. */ /* limit(n) */ limit_x = win->_maxx; /* limit(j) */ if (limit_x > newscr->_maxx - begx) limit_x = newscr->_maxx - begx; for (i = 0, m = begy + win->_yoffset; i <= win->_maxy && m <= newscr->_maxy; i++, m++) { register struct ldat *nline = &newscr->_line[m]; register struct ldat *oline = &win->_line[i]; if (oline->firstchar != _NOCHANGE) { int last = oline->lastchar; if (last > limit_x) last = limit_x; for (j = oline->firstchar, n = j + begx; j <= last; j++, n++) { if (!CharEq(oline->text[j], nline->text[n])) { nline->text[n] = oline->text[j]; CHANGED_CELL(nline, n); } } } #if USE_SCROLL_HINTS if (wide) { int oind = oline->oldindex; nline->oldindex = (oind == _NEWINDEX) ? _NEWINDEX : begy + oind + win->_yoffset; } #endif /* USE_SCROLL_HINTS */ oline->firstchar = oline->lastchar = _NOCHANGE; if_USE_SCROLL_HINTS(oline->oldindex = i); } if (win->_clear) { win->_clear = FALSE; newscr->_clear = TRUE; } if (!win->_leaveok) { newscr->_cury = win->_cury + win->_begy + win->_yoffset; newscr->_curx = win->_curx + win->_begx; } newscr->_leaveok = win->_leaveok; #ifdef TRACE if (_nc_tracing & TRACE_UPDATE) _tracedump("newscr", newscr); #endif /* TRACE */ returnCode(OK); }