--- /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 1.24 1999/07/31 11:36:37 juergen 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 limit_x;
+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;
+
+ 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.
+ */
+
+ /* limit(n) */
+ limit_x = win->_maxx;
+ /* limit(j) */
+ if (limit_x > win->_maxx)
+ limit_x = win->_maxx;
+
+ 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 (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);
+}
projects / ncurses.git / blobdiff