+++ /dev/null
-/****************************************************************************
- * Copyright (c) 1998 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 1.19 1998/02/11 12:13:59 tom Exp $")
-
-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);
-}
-
-int wnoutrefresh(WINDOW *win)
-{
-short i, j;
-short begx;
-short begy;
-short m, n;
-bool wide;
-
- 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;
-
- /*
- * If 'newscr' has a different background than the window that we're
- * trying to refresh, we'll have to copy the whole thing.
- */
- if (win->_bkgd != newscr->_bkgd) {
- touchwin(win);
- newscr->_bkgd = win->_bkgd;
- }
- newscr->_attrs = win->_attrs;
-
- /* merge in change information from all subwindows of this window */
- wsyncdown(win);
-
- /*
- * 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));
-
- 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.
- */
- 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;
-
- /* limit(j) */
- if (last > win->_maxx)
- last = win->_maxx;
- /* limit(n) */
- if (last > newscr->_maxx - begx)
- last = newscr->_maxx - begx;
-
- for (j = oline->firstchar, n = j + begx; j <= last; j++, n++) {
- if (oline->text[j] != nline->text[n]) {
- nline->text[n] = oline->text[j];
-
- if (nline->firstchar == _NOCHANGE)
- nline->firstchar = nline->lastchar = n;
- else if (n < nline->firstchar)
- nline->firstchar = n;
- else if (n > nline->lastchar)
- nline->lastchar = 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;
- }
-#ifdef TRACE
- if (_nc_tracing & TRACE_UPDATE)
- _tracedump("newscr", newscr);
-#endif /* TRACE */
- returnCode(OK);
-}
projects / ncurses.git / blobdiff