| 1 | /*
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| 2 | * Copyright (c) 1981 Regents of the University of California.
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | * 3. All advertising materials mentioning features or use of this software
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| 14 | * must display the following acknowledgement:
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| 15 | * This product includes software developed by the University of
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| 16 | * California, Berkeley and its contributors.
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| 17 | * 4. Neither the name of the University nor the names of its contributors
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| 18 | * may be used to endorse or promote products derived from this software
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| 19 | * without specific prior written permission.
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| 20 | *
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 31 | * SUCH DAMAGE.
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| 32 | */
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| 33 |
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| 34 | #ifndef lint
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| 35 | static char sccsid[] = "@(#)refresh.c 5.5 (Berkeley) 3/3/91";
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| 36 | #endif /* not lint */
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| 37 |
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| 38 | /*
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| 39 | * make the current screen look like "win" over the area coverd by
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| 40 | * win.
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| 41 | */
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| 42 |
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| 43 | # include "curses.ext"
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| 44 |
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| 45 | # ifdef DEBUG
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| 46 | # define STATIC
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| 47 | # else
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| 48 | # define STATIC static
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| 49 | # endif
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| 50 |
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| 51 | STATIC short ly, lx;
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| 52 |
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| 53 | STATIC bool curwin;
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| 54 |
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| 55 | WINDOW *_win = NULL;
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| 56 |
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| 57 | STATIC int domvcur(), makech();
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| 58 |
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| 59 | wrefresh(win)
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| 60 | reg WINDOW *win;
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| 61 | {
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| 62 | reg short wy;
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| 63 | reg int retval;
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| 64 | reg WINDOW *orig;
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| 65 |
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| 66 | /*
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| 67 | * make sure were in visual state
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| 68 | */
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| 69 | if (_endwin) {
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| 70 | _puts(VS);
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| 71 | _puts(TI);
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| 72 | _endwin = FALSE;
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| 73 | }
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| 74 |
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| 75 | /*
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| 76 | * initialize loop parameters
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| 77 | */
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| 78 |
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| 79 | ly = curscr->_cury;
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| 80 | lx = curscr->_curx;
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| 81 | wy = 0;
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| 82 | _win = win;
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| 83 | curwin = (win == curscr);
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| 84 |
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| 85 | if (win->_clear || curscr->_clear || curwin) {
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| 86 | if ((win->_flags & _FULLWIN) || curscr->_clear) {
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| 87 | _puts(CL);
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| 88 | ly = 0;
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| 89 | lx = 0;
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| 90 | if (!curwin) {
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| 91 | curscr->_clear = FALSE;
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| 92 | curscr->_cury = 0;
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| 93 | curscr->_curx = 0;
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| 94 | werase(curscr);
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| 95 | }
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| 96 | touchwin(win);
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| 97 | }
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| 98 | win->_clear = FALSE;
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| 99 | }
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| 100 | if (!CA) {
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| 101 | if (win->_curx != 0)
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| 102 | _putchar('\n');
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| 103 | if (!curwin)
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| 104 | werase(curscr);
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| 105 | }
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| 106 | # ifdef DEBUG
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| 107 | fprintf(outf, "REFRESH(%0.2o): curwin = %d\n", win, curwin);
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| 108 | fprintf(outf, "REFRESH:\n\tfirstch\tlastch\n");
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| 109 | # endif
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| 110 | for (wy = 0; wy < win->_maxy; wy++) {
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| 111 | # ifdef DEBUG
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| 112 | fprintf(outf, "%d\t%d\t%d\n", wy, win->_firstch[wy],
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| 113 | win->_lastch[wy]);
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| 114 | # endif
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| 115 | if (win->_firstch[wy] != _NOCHANGE)
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| 116 | if (makech(win, wy) == ERR)
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| 117 | return ERR;
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| 118 | else {
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| 119 | if (win->_firstch[wy] >= win->_ch_off)
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| 120 | win->_firstch[wy] = win->_maxx +
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| 121 | win->_ch_off;
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| 122 | if (win->_lastch[wy] < win->_maxx +
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| 123 | win->_ch_off)
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| 124 | win->_lastch[wy] = win->_ch_off;
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| 125 | if (win->_lastch[wy] < win->_firstch[wy])
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| 126 | win->_firstch[wy] = _NOCHANGE;
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| 127 | }
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| 128 | # ifdef DEBUG
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| 129 | fprintf(outf, "\t%d\t%d\n", win->_firstch[wy],
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| 130 | win->_lastch[wy]);
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| 131 | # endif
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| 132 | }
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| 133 |
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| 134 | if (win == curscr)
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| 135 | domvcur(ly, lx, win->_cury, win->_curx);
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| 136 | else {
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| 137 | if (win->_leave) {
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| 138 | curscr->_cury = ly;
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| 139 | curscr->_curx = lx;
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| 140 | ly -= win->_begy;
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| 141 | lx -= win->_begx;
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| 142 | if (ly >= 0 && ly < win->_maxy && lx >= 0 &&
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| 143 | lx < win->_maxx) {
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| 144 | win->_cury = ly;
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| 145 | win->_curx = lx;
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| 146 | }
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| 147 | else
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| 148 | win->_cury = win->_curx = 0;
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| 149 | }
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| 150 | else {
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| 151 | domvcur(ly, lx, win->_cury + win->_begy,
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| 152 | win->_curx + win->_begx);
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| 153 | curscr->_cury = win->_cury + win->_begy;
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| 154 | curscr->_curx = win->_curx + win->_begx;
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| 155 | }
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| 156 | }
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| 157 | retval = OK;
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| 158 | ret:
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| 159 | _win = NULL;
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| 160 | fflush(stdout);
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| 161 | return retval;
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| 162 | }
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| 163 |
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| 164 | /*
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| 165 | * make a change on the screen
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| 166 | */
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| 167 | STATIC
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| 168 | makech(win, wy)
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| 169 | reg WINDOW *win;
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| 170 | short wy;
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| 171 | {
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| 172 | reg char *nsp, *csp, *ce;
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| 173 | reg short wx, lch, y;
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| 174 | reg int nlsp, clsp; /* last space in lines */
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| 175 |
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| 176 | wx = win->_firstch[wy] - win->_ch_off;
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| 177 | if (wx >= win->_maxx)
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| 178 | return OK;
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| 179 | else if (wx < 0)
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| 180 | wx = 0;
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| 181 | lch = win->_lastch[wy] - win->_ch_off;
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| 182 | if (lch < 0)
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| 183 | return OK;
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| 184 | else if (lch >= win->_maxx)
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| 185 | lch = win->_maxx - 1;;
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| 186 | y = wy + win->_begy;
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| 187 |
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| 188 | if (curwin)
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| 189 | csp = " ";
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| 190 | else
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| 191 | csp = &curscr->_y[wy + win->_begy][wx + win->_begx];
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| 192 |
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| 193 | nsp = &win->_y[wy][wx];
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| 194 | if (CE && !curwin) {
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| 195 | for (ce = &win->_y[wy][win->_maxx - 1]; *ce == ' '; ce--)
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| 196 | if (ce <= win->_y[wy])
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| 197 | break;
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| 198 | nlsp = ce - win->_y[wy];
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| 199 | }
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| 200 |
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| 201 | if (!curwin)
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| 202 | ce = CE;
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| 203 | else
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| 204 | ce = NULL;
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| 205 |
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| 206 | while (wx <= lch) {
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| 207 | if (*nsp != *csp) {
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| 208 | domvcur(ly, lx, y, wx + win->_begx);
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| 209 | # ifdef DEBUG
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| 210 | fprintf(outf, "MAKECH: 1: wx = %d, lx = %d\n", wx, lx);
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| 211 | # endif
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| 212 | ly = y;
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| 213 | lx = wx + win->_begx;
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| 214 | while (*nsp != *csp && wx <= lch) {
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| 215 | if (ce != NULL && wx >= nlsp && *nsp == ' ') {
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| 216 | /*
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| 217 | * check for clear to end-of-line
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| 218 | */
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| 219 | ce = &curscr->_y[ly][COLS - 1];
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| 220 | while (*ce == ' ')
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| 221 | if (ce-- <= csp)
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| 222 | break;
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| 223 | clsp = ce - curscr->_y[ly] - win->_begx;
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| 224 | # ifdef DEBUG
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| 225 | fprintf(outf, "MAKECH: clsp = %d, nlsp = %d\n", clsp, nlsp);
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| 226 | # endif
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| 227 | if (clsp - nlsp >= strlen(CE)
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| 228 | && clsp < win->_maxx) {
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| 229 | # ifdef DEBUG
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| 230 | fprintf(outf, "MAKECH: using CE\n");
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| 231 | # endif
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| 232 | _puts(CE);
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| 233 | lx = wx + win->_begx;
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| 234 | while (wx++ <= clsp)
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| 235 | *csp++ = ' ';
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| 236 | return OK;
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| 237 | }
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| 238 | ce = NULL;
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| 239 | }
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| 240 | /*
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| 241 | * enter/exit standout mode as appropriate
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| 242 | */
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| 243 | if (SO && (*nsp&_STANDOUT) != (curscr->_flags&_STANDOUT)) {
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| 244 | if (*nsp & _STANDOUT) {
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| 245 | _puts(SO);
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| 246 | curscr->_flags |= _STANDOUT;
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| 247 | }
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| 248 | else {
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| 249 | _puts(SE);
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| 250 | curscr->_flags &= ~_STANDOUT;
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| 251 | }
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| 252 | }
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| 253 | wx++;
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| 254 | if (wx >= win->_maxx && wy == win->_maxy - 1)
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| 255 | if (win->_scroll) {
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| 256 | if ((curscr->_flags&_STANDOUT) &&
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| 257 | (win->_flags & _ENDLINE))
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| 258 | if (!MS) {
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| 259 | _puts(SE);
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| 260 | curscr->_flags &= ~_STANDOUT;
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| 261 | }
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| 262 | if (!curwin)
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| 263 | _putchar((*csp = *nsp));
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| 264 | else
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| 265 | _putchar(*nsp);
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| 266 | if (win->_flags&_FULLWIN && !curwin)
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| 267 | scroll(curscr);
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| 268 | ly = win->_begy+win->_cury;
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| 269 | lx = win->_begx+win->_curx;
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| 270 | return OK;
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| 271 | }
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| 272 | else if (win->_flags&_SCROLLWIN) {
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| 273 | lx = --wx;
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| 274 | return ERR;
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| 275 | }
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| 276 | if (!curwin)
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| 277 | _putchar((*csp++ = *nsp));
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| 278 | else
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| 279 | _putchar(*nsp);
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| 280 | # ifdef FULLDEBUG
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| 281 | fprintf(outf,
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| 282 | "MAKECH:putchar(%c)\n", *nsp);
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| 283 | # endif
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| 284 | if (UC && (*nsp & _STANDOUT)) {
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| 285 | _putchar('\b');
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| 286 | _puts(UC);
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| 287 | }
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| 288 | nsp++;
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| 289 | }
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| 290 | # ifdef DEBUG
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| 291 | fprintf(outf, "MAKECH: 2: wx = %d, lx = %d\n", wx, lx);
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| 292 | # endif
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| 293 | if (lx == wx + win->_begx) /* if no change */
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| 294 | break;
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| 295 | lx = wx + win->_begx;
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| 296 | if (lx >= COLS && AM) {
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| 297 | lx = 0;
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| 298 | ly++;
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| 299 | /*
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| 300 | * xn glitch: chomps a newline after auto-wrap.
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| 301 | * we just feed it now and forget about it.
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| 302 | */
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| 303 | if (XN) {
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| 304 | _putchar('\n');
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| 305 | _putchar('\r');
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| 306 | }
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| 307 | }
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| 308 | }
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| 309 | else if (wx <= lch)
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| 310 | while (*nsp == *csp && wx <= lch) {
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| 311 | nsp++;
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| 312 | if (!curwin)
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| 313 | csp++;
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| 314 | ++wx;
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| 315 | }
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| 316 | else
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| 317 | break;
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| 318 | # ifdef DEBUG
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| 319 | fprintf(outf, "MAKECH: 3: wx = %d, lx = %d\n", wx, lx);
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| 320 | # endif
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| 321 | }
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| 322 | return OK;
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| 323 | }
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| 324 |
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| 325 | /*
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| 326 | * perform a mvcur, leaving standout mode if necessary
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| 327 | */
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| 328 | STATIC
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| 329 | domvcur(oy, ox, ny, nx)
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| 330 | int oy, ox, ny, nx; {
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| 331 |
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| 332 | if (curscr->_flags & _STANDOUT && !MS) {
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| 333 | _puts(SE);
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| 334 | curscr->_flags &= ~_STANDOUT;
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| 335 | }
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| 336 | mvcur(oy, ox, ny, nx);
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| 337 | }
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