[unix-history] / usr / src / lib / libcurses / refresh.c

/*
 * 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 char	*nsp, *csp, *ce;
	reg short	wx, lch, y;
	reg int		nlsp, clsp;	/* last space in lines		*/

	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 = " ";
	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 = CE;
	else
		ce = 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 != 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 = 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) & 0177);
					    else
						_putchar(*nsp & 0177);
					    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) & 0177);
				else
					_putchar(*nsp & 0177);
# ifdef FULLDEBUG
				fprintf(outf,
					"MAKECH:putchar(%c)\n", *nsp & 0177);
# 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);
}
Commit	Line	Data
6e7daf84 WJ	1	/*
	2	* Copyright (c) 1981 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*/
	33
	34	#ifndef lint
	35	static char sccsid[] = "@(#)refresh.c 5.5 (Berkeley) 3/3/91";
	36	#endif /* not lint */
	37
	38	/*
	39	* make the current screen look like "win" over the area coverd by
	40	* win.
	41	*/
	42
	43	# include "curses.ext"
	44
	45	# ifdef DEBUG
	46	# define STATIC
	47	# else
	48	# define STATIC static
	49	# endif
	50
	51	STATIC short ly, lx;
	52
	53	STATIC bool curwin;
	54
	55	WINDOW *_win = NULL;
	56
	57	STATIC int domvcur(), makech();
	58
	59	wrefresh(win)
	60	reg WINDOW *win;
	61	{
	62	reg short wy;
	63	reg int retval;
	64	reg WINDOW *orig;
65
66	/*
67	* make sure were in visual state
68	*/
69	if (_endwin) {
70	_puts(VS);
71	_puts(TI);
72	_endwin = FALSE;
73	}
74
75	/*
76	* initialize loop parameters
77	*/
78
79	ly = curscr->_cury;
80	lx = curscr->_curx;
81	wy = 0;
82	_win = win;
83	curwin = (win == curscr);
84
85	if (win->_clear \|\| curscr->_clear \|\| curwin) {
86	if ((win->_flags & _FULLWIN) \|\| curscr->_clear) {
87	_puts(CL);
88	ly = 0;
89	lx = 0;
90	if (!curwin) {
91	curscr->_clear = FALSE;
92	curscr->_cury = 0;
93	curscr->_curx = 0;
94	werase(curscr);
95	}
96	touchwin(win);
97	}
98	win->_clear = FALSE;
99	}
100	if (!CA) {
101	if (win->_curx != 0)
102	_putchar('\n');
103	if (!curwin)
104	werase(curscr);
105	}
106	# ifdef DEBUG
107	fprintf(outf, "REFRESH(%0.2o): curwin = %d\n", win, curwin);
108	fprintf(outf, "REFRESH:\n\tfirstch\tlastch\n");
109	# endif
110	for (wy = 0; wy < win->_maxy; wy++) {
111	# ifdef DEBUG
112	fprintf(outf, "%d\t%d\t%d\n", wy, win->_firstch[wy],
113	win->_lastch[wy]);
114	# endif
115	if (win->_firstch[wy] != _NOCHANGE)
116	if (makech(win, wy) == ERR)
117	return ERR;
118	else {
119	if (win->_firstch[wy] >= win->_ch_off)
120	win->_firstch[wy] = win->_maxx +
121	win->_ch_off;
122	if (win->_lastch[wy] < win->_maxx +
123	win->_ch_off)
124	win->_lastch[wy] = win->_ch_off;
125	if (win->_lastch[wy] < win->_firstch[wy])
126	win->_firstch[wy] = _NOCHANGE;
127	}
128	# ifdef DEBUG
129	fprintf(outf, "\t%d\t%d\n", win->_firstch[wy],
130	win->_lastch[wy]);
131	# endif
132	}
133
134	if (win == curscr)
135	domvcur(ly, lx, win->_cury, win->_curx);
136	else {
137	if (win->_leave) {
138	curscr->_cury = ly;
139	curscr->_curx = lx;
140	ly -= win->_begy;
141	lx -= win->_begx;
142	if (ly >= 0 && ly < win->_maxy && lx >= 0 &&
143	lx < win->_maxx) {
144	win->_cury = ly;
145	win->_curx = lx;
146	}
147	else
148	win->_cury = win->_curx = 0;
149	}
150	else {
151	domvcur(ly, lx, win->_cury + win->_begy,
152	win->_curx + win->_begx);
153	curscr->_cury = win->_cury + win->_begy;
154	curscr->_curx = win->_curx + win->_begx;
155	}
156	}
157	retval = OK;
158	ret:
159	_win = NULL;
160	fflush(stdout);
161	return retval;
162	}
163
164	/*
165	* make a change on the screen
166	*/
167	STATIC
168	makech(win, wy)
169	reg WINDOW *win;
170	short wy;
171	{
172	reg char nsp, csp, *ce;
173	reg short wx, lch, y;
174	reg int nlsp, clsp; /* last space in lines */
175
176	wx = win->_firstch[wy] - win->_ch_off;
177	if (wx >= win->_maxx)
178	return OK;
179	else if (wx < 0)
180	wx = 0;
181	lch = win->_lastch[wy] - win->_ch_off;
182	if (lch < 0)
183	return OK;
184	else if (lch >= win->_maxx)
185	lch = win->_maxx - 1;;
186	y = wy + win->_begy;
187
188	if (curwin)
189	csp = " ";
190	else
191	csp = &curscr->_y[wy + win->_begy][wx + win->_begx];
192
193	nsp = &win->_y[wy][wx];
194	if (CE && !curwin) {
195	for (ce = &win->_y[wy][win->_maxx - 1]; *ce == ' '; ce--)
196	if (ce <= win->_y[wy])
197	break;
198	nlsp = ce - win->_y[wy];
199	}
200
201	if (!curwin)
202	ce = CE;
203	else
204	ce = NULL;
205
206	while (wx <= lch) {
207	if (nsp != csp) {
208	domvcur(ly, lx, y, wx + win->_begx);
209	# ifdef DEBUG
210	fprintf(outf, "MAKECH: 1: wx = %d, lx = %d\n", wx, lx);
211	# endif
212	ly = y;
213	lx = wx + win->_begx;
214	while (nsp != csp && wx <= lch) {
215	if (ce != NULL && wx >= nlsp && *nsp == ' ') {
216	/*
217	* check for clear to end-of-line
218	*/
219	ce = &curscr->_y[ly][COLS - 1];
220	while (*ce == ' ')
221	if (ce-- <= csp)
222	break;
223	clsp = ce - curscr->_y[ly] - win->_begx;
224	# ifdef DEBUG
225	fprintf(outf, "MAKECH: clsp = %d, nlsp = %d\n", clsp, nlsp);
226	# endif
227	if (clsp - nlsp >= strlen(CE)
228	&& clsp < win->_maxx) {
229	# ifdef DEBUG
230	fprintf(outf, "MAKECH: using CE\n");
231	# endif
232	_puts(CE);
233	lx = wx + win->_begx;
234	while (wx++ <= clsp)
235	*csp++ = ' ';
236	return OK;
237	}
238	ce = NULL;
239	}
240	/*
241	* enter/exit standout mode as appropriate
242	*/
243	if (SO && (*nsp&_STANDOUT) != (curscr->_flags&_STANDOUT)) {
244	if (*nsp & _STANDOUT) {
245	_puts(SO);
246	curscr->_flags \|= _STANDOUT;
247	}
248	else {
249	_puts(SE);
250	curscr->_flags &= ~_STANDOUT;
251	}
252	}
253	wx++;
254	if (wx >= win->_maxx && wy == win->_maxy - 1)
255	if (win->_scroll) {
256	if ((curscr->_flags&_STANDOUT) &&
257	(win->_flags & _ENDLINE))
258	if (!MS) {
259	_puts(SE);
260	curscr->_flags &= ~_STANDOUT;
261	}
262	if (!curwin)
263	_putchar((csp = nsp) & 0177);
264	else
265	_putchar(*nsp & 0177);
266	if (win->_flags&_FULLWIN && !curwin)
267	scroll(curscr);
268	ly = win->_begy+win->_cury;
269	lx = win->_begx+win->_curx;
270	return OK;
271	}
272	else if (win->_flags&_SCROLLWIN) {
273	lx = --wx;
274	return ERR;
275	}
276	if (!curwin)
277	_putchar((csp++ = nsp) & 0177);
278	else
279	_putchar(*nsp & 0177);
280	# ifdef FULLDEBUG
281	fprintf(outf,
282	"MAKECH:putchar(%c)\n", *nsp & 0177);
283	# endif
284	if (UC && (*nsp & _STANDOUT)) {
285	_putchar('\b');
286	_puts(UC);
287	}
288	nsp++;
289	}
290	# ifdef DEBUG
291	fprintf(outf, "MAKECH: 2: wx = %d, lx = %d\n", wx, lx);
292	# endif
293	if (lx == wx + win->_begx) /* if no change */
294	break;
295	lx = wx + win->_begx;
296	if (lx >= COLS && AM) {
297	lx = 0;
298	ly++;
299	/*
300	* xn glitch: chomps a newline after auto-wrap.
301	* we just feed it now and forget about it.
302	*/
303	if (XN) {
304	_putchar('\n');
305	_putchar('\r');
306	}
307	}
308	}
309	else if (wx <= lch)
310	while (nsp == csp && wx <= lch) {
311	nsp++;
312	if (!curwin)
313	csp++;
314	++wx;
315	}
316	else
317	break;
318	# ifdef DEBUG
319	fprintf(outf, "MAKECH: 3: wx = %d, lx = %d\n", wx, lx);
320	# endif
321	}
322	return OK;
323	}
324
325	/*
326	* perform a mvcur, leaving standout mode if necessary
327	*/
328	STATIC
329	domvcur(oy, ox, ny, nx)
330	int oy, ox, ny, nx; {
331
332	if (curscr->_flags & _STANDOUT && !MS) {
333	_puts(SE);
334	curscr->_flags &= ~_STANDOUT;
335	}
336	mvcur(oy, ox, ny, nx);
337	}