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-rw-r--r--lib/libcurses/refresh.c339
1 files changed, 339 insertions, 0 deletions
diff --git a/lib/libcurses/refresh.c b/lib/libcurses/refresh.c
new file mode 100644
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--- /dev/null
+++ b/lib/libcurses/refresh.c
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+/*
+ * Copyright (c) 1981 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)refresh.c 5.5 (Berkeley) 3/3/91";
+#endif /* not lint */
+
+/*
+ * make the current screen look like "win" over the area coverd by
+ * win.
+ */
+
+# include "curses.ext"
+
+# ifdef DEBUG
+# define STATIC
+# else
+# define STATIC static
+# endif
+
+STATIC short ly, lx;
+
+STATIC bool curwin;
+
+WINDOW *_win = NULL;
+
+STATIC int domvcur(), makech();
+
+wrefresh(win)
+reg WINDOW *win;
+{
+ reg short wy;
+ reg int retval;
+ reg WINDOW *orig;
+
+ /*
+ * make sure were in visual state
+ */
+ if (_endwin) {
+ _puts(VS);
+ _puts(TI);
+ _endwin = FALSE;
+ }
+
+ /*
+ * initialize loop parameters
+ */
+
+ ly = curscr->_cury;
+ lx = curscr->_curx;
+ wy = 0;
+ _win = win;
+ curwin = (win == curscr);
+
+ if (win->_clear || curscr->_clear || curwin) {
+ if ((win->_flags & _FULLWIN) || curscr->_clear) {
+ _puts(CL);
+ ly = 0;
+ lx = 0;
+ if (!curwin) {
+ curscr->_clear = FALSE;
+ curscr->_cury = 0;
+ curscr->_curx = 0;
+ werase(curscr);
+ }
+ touchwin(win);
+ }
+ win->_clear = FALSE;
+ }
+ if (!CA) {
+ if (win->_curx != 0)
+ _putchar('\n');
+ if (!curwin)
+ werase(curscr);
+ }
+# ifdef DEBUG
+ fprintf(outf, "REFRESH(%0.2o): curwin = %d\n", win, curwin);
+ fprintf(outf, "REFRESH:\n\tfirstch\tlastch\n");
+# endif
+ for (wy = 0; wy < win->_maxy; wy++) {
+# ifdef DEBUG
+ fprintf(outf, "%d\t%d\t%d\n", wy, win->_firstch[wy],
+ win->_lastch[wy]);
+# endif
+ if (win->_firstch[wy] != _NOCHANGE)
+ if (makech(win, wy) == ERR)
+ return ERR;
+ else {
+ if (win->_firstch[wy] >= win->_ch_off)
+ win->_firstch[wy] = win->_maxx +
+ win->_ch_off;
+ if (win->_lastch[wy] < win->_maxx +
+ win->_ch_off)
+ win->_lastch[wy] = win->_ch_off;
+ if (win->_lastch[wy] < win->_firstch[wy])
+ win->_firstch[wy] = _NOCHANGE;
+ }
+# ifdef DEBUG
+ fprintf(outf, "\t%d\t%d\n", win->_firstch[wy],
+ win->_lastch[wy]);
+# endif
+ }
+
+ if (win == curscr)
+ domvcur(ly, lx, win->_cury, win->_curx);
+ else {
+ if (win->_leave) {
+ curscr->_cury = ly;
+ curscr->_curx = lx;
+ ly -= win->_begy;
+ lx -= win->_begx;
+ if (ly >= 0 && ly < win->_maxy && lx >= 0 &&
+ lx < win->_maxx) {
+ win->_cury = ly;
+ win->_curx = lx;
+ }
+ else
+ win->_cury = win->_curx = 0;
+ }
+ else {
+ domvcur(ly, lx, win->_cury + win->_begy,
+ win->_curx + win->_begx);
+ curscr->_cury = win->_cury + win->_begy;
+ curscr->_curx = win->_curx + win->_begx;
+ }
+ }
+ retval = OK;
+ret:
+ _win = NULL;
+ fflush(stdout);
+ return retval;
+}
+
+/*
+ * make a change on the screen
+ */
+STATIC
+makech(win, wy)
+reg WINDOW *win;
+short wy;
+{
+ reg chtype *nsp, *csp, *ce;
+ reg short wx, lch, y;
+ reg int nlsp, clsp; /* last space in lines */
+ char *ce_tcap;
+ static chtype blank[] = {' ','\0'};
+
+ wx = win->_firstch[wy] - win->_ch_off;
+ if (wx >= win->_maxx)
+ return OK;
+ else if (wx < 0)
+ wx = 0;
+ lch = win->_lastch[wy] - win->_ch_off;
+ if (lch < 0)
+ return OK;
+ else if (lch >= win->_maxx)
+ lch = win->_maxx - 1;;
+ y = wy + win->_begy;
+
+ if (curwin)
+ csp = blank;
+ else
+ csp = &curscr->_y[wy + win->_begy][wx + win->_begx];
+
+ nsp = &win->_y[wy][wx];
+ if (CE && !curwin) {
+ for (ce = &win->_y[wy][win->_maxx - 1]; *ce == ' '; ce--)
+ if (ce <= win->_y[wy])
+ break;
+ nlsp = ce - win->_y[wy];
+ }
+
+ if (!curwin)
+ ce_tcap = CE;
+ else
+ ce_tcap = NULL;
+
+ while (wx <= lch) {
+ if (*nsp != *csp) {
+ domvcur(ly, lx, y, wx + win->_begx);
+# ifdef DEBUG
+ fprintf(outf, "MAKECH: 1: wx = %d, lx = %d\n", wx, lx);
+# endif
+ ly = y;
+ lx = wx + win->_begx;
+ while (*nsp != *csp && wx <= lch) {
+ if (ce_tcap != NULL && wx >= nlsp && *nsp == ' ') {
+ /*
+ * check for clear to end-of-line
+ */
+ ce = &curscr->_y[ly][COLS - 1];
+ while (*ce == ' ')
+ if (ce-- <= csp)
+ break;
+ clsp = ce - curscr->_y[ly] - win->_begx;
+# ifdef DEBUG
+ fprintf(outf, "MAKECH: clsp = %d, nlsp = %d\n", clsp, nlsp);
+# endif
+ if (clsp - nlsp >= strlen(CE)
+ && clsp < win->_maxx) {
+# ifdef DEBUG
+ fprintf(outf, "MAKECH: using CE\n");
+# endif
+ _puts(CE);
+ lx = wx + win->_begx;
+ while (wx++ <= clsp)
+ *csp++ = ' ';
+ return OK;
+ }
+ ce_tcap = NULL;
+ }
+ /*
+ * enter/exit standout mode as appropriate
+ */
+ if (SO && (*nsp&_STANDOUT) != (curscr->_flags&_STANDOUT)) {
+ if (*nsp & _STANDOUT) {
+ _puts(SO);
+ curscr->_flags |= _STANDOUT;
+ }
+ else {
+ _puts(SE);
+ curscr->_flags &= ~_STANDOUT;
+ }
+ }
+ wx++;
+ if (wx >= win->_maxx && wy == win->_maxy - 1)
+ if (win->_scroll) {
+ if ((curscr->_flags&_STANDOUT) &&
+ (win->_flags & _ENDLINE))
+ if (!MS) {
+ _puts(SE);
+ curscr->_flags &= ~_STANDOUT;
+ }
+ if (!curwin)
+ _putchar((*csp = *nsp));
+ else
+ _putchar(*nsp);
+ if (win->_flags&_FULLWIN && !curwin)
+ scroll(curscr);
+ ly = win->_begy+win->_cury;
+ lx = win->_begx+win->_curx;
+ return OK;
+ }
+ else if (win->_flags&_SCROLLWIN) {
+ lx = --wx;
+ return ERR;
+ }
+ if (!curwin)
+ _putchar((*csp++ = *nsp));
+ else
+ _putchar(*nsp);
+# ifdef FULLDEBUG
+ fprintf(outf,
+ "MAKECH:putchar(%c)\n", *nsp);
+# endif
+ if (UC && (*nsp & _STANDOUT)) {
+ _putchar('\b');
+ _puts(UC);
+ }
+ nsp++;
+ }
+# ifdef DEBUG
+ fprintf(outf, "MAKECH: 2: wx = %d, lx = %d\n", wx, lx);
+# endif
+ if (lx == wx + win->_begx) /* if no change */
+ break;
+ lx = wx + win->_begx;
+ if (lx >= COLS && AM) {
+ lx = 0;
+ ly++;
+ /*
+ * xn glitch: chomps a newline after auto-wrap.
+ * we just feed it now and forget about it.
+ */
+ if (XN) {
+ _putchar('\n');
+ _putchar('\r');
+ }
+ }
+ }
+ else if (wx <= lch)
+ while (*nsp == *csp && wx <= lch) {
+ nsp++;
+ if (!curwin)
+ csp++;
+ ++wx;
+ }
+ else
+ break;
+# ifdef DEBUG
+ fprintf(outf, "MAKECH: 3: wx = %d, lx = %d\n", wx, lx);
+# endif
+ }
+ return OK;
+}
+
+/*
+ * perform a mvcur, leaving standout mode if necessary
+ */
+STATIC
+domvcur(oy, ox, ny, nx)
+int oy, ox, ny, nx; {
+
+ if (curscr->_flags & _STANDOUT && !MS) {
+ _puts(SE);
+ curscr->_flags &= ~_STANDOUT;
+ }
+ mvcur(oy, ox, ny, nx);
+}
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