[apple/network_cmds.git] / talk.tproj / display.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1983, 1993
 *	The 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.
 */


/*
 * The window 'manager', initializes curses and handles the actual
 * displaying of text
 */
#include "talk.h"

xwin_t	my_win;
xwin_t	his_win;
WINDOW	*line_win;

int	curses_initialized = 0;

/*
 * max HAS to be a function, it is called with
 * a argument of the form --foo at least once.
 */
max(a,b)
	int a, b;
{

	return (a > b ? a : b);
}

/*
 * Display some text on somebody's window, processing some control
 * characters while we are at it.
 */
display(win, text, size)
	register xwin_t *win;
	register char *text;
	int size;
{
	register int i;
	char cch;

	for (i = 0; i < size; i++) {
		if (*text == '\n') {
			xscroll(win, 0);
			text++;
			continue;
		}
		/* erase character */
		if (*text == win->cerase) {
			wmove(win->x_win, win->x_line, max(--win->x_col, 0));
			getyx(win->x_win, win->x_line, win->x_col);
			waddch(win->x_win, ' ');
			wmove(win->x_win, win->x_line, win->x_col);
			getyx(win->x_win, win->x_line, win->x_col);
			text++;
			continue;
		}
		/*
		 * On word erase search backwards until we find
		 * the beginning of a word or the beginning of
		 * the line.
		 */
		if (*text == win->werase) {
			int endcol, xcol, i, c;

			endcol = win->x_col;
			xcol = endcol - 1;
			while (xcol >= 0) {
				c = readwin(win->x_win, win->x_line, xcol);
				if (c != ' ')
					break;
				xcol--;
			}
			while (xcol >= 0) {
				c = readwin(win->x_win, win->x_line, xcol);
				if (c == ' ')
					break;
				xcol--;
			}
			wmove(win->x_win, win->x_line, xcol + 1);
			for (i = xcol + 1; i < endcol; i++)
				waddch(win->x_win, ' ');
			wmove(win->x_win, win->x_line, xcol + 1);
			getyx(win->x_win, win->x_line, win->x_col);
			text++;
			continue;
		}
		/* line kill */
		if (*text == win->kill) {
			wmove(win->x_win, win->x_line, 0);
			wclrtoeol(win->x_win);
			getyx(win->x_win, win->x_line, win->x_col);
			text++;
			continue;
		}
		if (*text == '\f') {
			if (win == &my_win)
				wrefresh(curscr);
			text++;
			continue;
		}
		if (win->x_col == COLS-1) {
			/* check for wraparound */
			xscroll(win, 0);
		}
		if (*text < ' ' && *text != '\t') {
			waddch(win->x_win, '^');
			getyx(win->x_win, win->x_line, win->x_col);
			if (win->x_col == COLS-1) /* check for wraparound */
				xscroll(win, 0);
			cch = (*text & 63) + 64;
			waddch(win->x_win, cch);
		} else
			waddch(win->x_win, *text);
		getyx(win->x_win, win->x_line, win->x_col);
		text++;
	}
	wrefresh(win->x_win);
}

/*
 * Read the character at the indicated position in win
 */
readwin(win, line, col)
	WINDOW *win;
{
	int oldline, oldcol;
	register int c;

	getyx(win, oldline, oldcol);
	wmove(win, line, col);
	c = winch(win);
	wmove(win, oldline, oldcol);
	return (c);
}

/*
 * Scroll a window, blanking out the line following the current line
 * so that the current position is obvious
 */
xscroll(win, flag)
	register xwin_t *win;
	int flag;
{

	if (flag == -1) {
		wmove(win->x_win, 0, 0);
		win->x_line = 0;
		win->x_col = 0;
		return;
	}
	win->x_line = (win->x_line + 1) % win->x_nlines;
	win->x_col = 0;
	wmove(win->x_win, win->x_line, win->x_col);
	wclrtoeol(win->x_win);
	wmove(win->x_win, (win->x_line + 1) % win->x_nlines, win->x_col);
	wclrtoeol(win->x_win);
	wmove(win->x_win, win->x_line, win->x_col);
}
Commit	Line	Data
b7080c8e A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
ac2f15b3 A	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
	7	*
	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
b7080c8e A	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
ac2f15b3 A	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
b7080c8e A	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	/*
	26	* Copyright (c) 1983, 1993
	27	* The Regents of the University of California. All rights reserved.
	28	*
	29	* Redistribution and use in source and binary forms, with or without
	30	* modification, are permitted provided that the following conditions
	31	* are met:
	32	* 1. Redistributions of source code must retain the above copyright
	33	* notice, this list of conditions and the following disclaimer.
	34	* 2. Redistributions in binary form must reproduce the above copyright
	35	* notice, this list of conditions and the following disclaimer in the
	36	* documentation and/or other materials provided with the distribution.
	37	* 3. All advertising materials mentioning features or use of this software
	38	* must display the following acknowledgement:
	39	* This product includes software developed by the University of
	40	* California, Berkeley and its contributors.
	41	* 4. Neither the name of the University nor the names of its contributors
	42	* may be used to endorse or promote products derived from this software
	43	* without specific prior written permission.
	44	*
	45	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	46	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	47	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	48	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	49	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	50	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	51	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	52	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	53	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	54	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	55	* SUCH DAMAGE.
	56	*/
	57
	58
	59	/*
	60	* The window 'manager', initializes curses and handles the actual
	61	* displaying of text
	62	*/
	63	#include "talk.h"
	64
	65	xwin_t my_win;
	66	xwin_t his_win;
	67	WINDOW *line_win;
	68
	69	int curses_initialized = 0;
	70
	71	/*
	72	* max HAS to be a function, it is called with
	73	* a argument of the form --foo at least once.
	74	*/
	75	max(a,b)
	76	int a, b;
	77	{
	78
	79	return (a > b ? a : b);
	80	}
	81
	82	/*
	83	* Display some text on somebody's window, processing some control
	84	* characters while we are at it.
	85	*/
86	display(win, text, size)
87	register xwin_t *win;
88	register char *text;
89	int size;
90	{
91	register int i;
92	char cch;
93
94	for (i = 0; i < size; i++) {
95	if (*text == '\n') {
96	xscroll(win, 0);
97	text++;
98	continue;
99	}
100	/* erase character */
101	if (*text == win->cerase) {
102	wmove(win->x_win, win->x_line, max(--win->x_col, 0));
103	getyx(win->x_win, win->x_line, win->x_col);
104	waddch(win->x_win, ' ');
105	wmove(win->x_win, win->x_line, win->x_col);
106	getyx(win->x_win, win->x_line, win->x_col);
107	text++;
108	continue;
109	}
110	/*
111	* On word erase search backwards until we find
112	* the beginning of a word or the beginning of
113	* the line.
114	*/
115	if (*text == win->werase) {
116	int endcol, xcol, i, c;
117
118	endcol = win->x_col;
119	xcol = endcol - 1;
120	while (xcol >= 0) {
121	c = readwin(win->x_win, win->x_line, xcol);
122	if (c != ' ')
123	break;
124	xcol--;
125	}
126	while (xcol >= 0) {
127	c = readwin(win->x_win, win->x_line, xcol);
128	if (c == ' ')
129	break;
130	xcol--;
131	}
132	wmove(win->x_win, win->x_line, xcol + 1);
133	for (i = xcol + 1; i < endcol; i++)
134	waddch(win->x_win, ' ');
135	wmove(win->x_win, win->x_line, xcol + 1);
136	getyx(win->x_win, win->x_line, win->x_col);
137	text++;
138	continue;
139	}
140	/* line kill */
141	if (*text == win->kill) {
142	wmove(win->x_win, win->x_line, 0);
143	wclrtoeol(win->x_win);
144	getyx(win->x_win, win->x_line, win->x_col);
145	text++;
146	continue;
147	}
148	if (*text == '\f') {
149	if (win == &my_win)
150	wrefresh(curscr);
151	text++;
152	continue;
153	}
154	if (win->x_col == COLS-1) {
155	/* check for wraparound */
156	xscroll(win, 0);
157	}
158	if (text < ' ' && text != '\t') {
159	waddch(win->x_win, '^');
160	getyx(win->x_win, win->x_line, win->x_col);
161	if (win->x_col == COLS-1) /* check for wraparound */
162	xscroll(win, 0);
163	cch = (*text & 63) + 64;
164	waddch(win->x_win, cch);
165	} else
166	waddch(win->x_win, *text);
167	getyx(win->x_win, win->x_line, win->x_col);
168	text++;
169	}
170	wrefresh(win->x_win);
171	}
172
173	/*
174	* Read the character at the indicated position in win
175	*/
176	readwin(win, line, col)
177	WINDOW *win;
178	{
179	int oldline, oldcol;
180	register int c;
181
182	getyx(win, oldline, oldcol);
183	wmove(win, line, col);
184	c = winch(win);
185	wmove(win, oldline, oldcol);
186	return (c);
187	}
188
189	/*
190	* Scroll a window, blanking out the line following the current line
191	* so that the current position is obvious
192	*/
193	xscroll(win, flag)
194	register xwin_t *win;
195	int flag;
196	{
197
198	if (flag == -1) {
199	wmove(win->x_win, 0, 0);
200	win->x_line = 0;
201	win->x_col = 0;
202	return;
203	}
204	win->x_line = (win->x_line + 1) % win->x_nlines;
205	win->x_col = 0;
206	wmove(win->x_win, win->x_line, win->x_col);
207	wclrtoeol(win->x_win);
208	wmove(win->x_win, (win->x_line + 1) % win->x_nlines, win->x_col);
209	wclrtoeol(win->x_win);
210	wmove(win->x_win, win->x_line, win->x_col);
211	}