src/common/xtwind.c

/* Copyright (c) 1987 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 *  xtwind.c - routines for X text windows.
 *
 *      10/30/87
 */

#include  <stdio.h>

#include  <X/Xlib.h>

#include  "xtwind.h"

#ifndef  BSD
#define  bzero(d,n)             (void)memset(d,0,n)
extern char  *memset();
#endif

#define checkcurs(t)            if ((t)->cursor) togglecurs(t)

#define restorecurs             checkcurs

#define togglecurs(t)           XPixFill((t)->w, (t)->c*(t)->f.width+LEFTMAR, \
                                (t)->r*(t)->f.height, (t)->f.width, \
                                (t)->f.height, 0, 0, GXinvert, 1)

extern char  *calloc(), *malloc();


TEXTWIND *
xt_open(parent, x, y, width, height, border, fontname)
Window  parent;
int  x, y;
int  width, height;
int  border;
char  *fontname;
{
        register int  i;
        register TEXTWIND  *t;

        if ((t = (TEXTWIND *)malloc(sizeof(TEXTWIND))) == NULL)
                return(NULL);
        t->w = XCreateWindow(parent, x, y, width, height,
                        border, BlackPixmap, WhitePixmap);
        if (t->w == 0)
                return(NULL);
        XMapWindow(t->w);
        if ((i = XGetFont(fontname)) == 0)
                return(NULL);
        if (XQueryFont(i, &t->f) == 0)
                return(NULL);
        if (!t->f.fixedwidth)
                return(NULL);
        t->nc = (width - LEFTMAR) / t->f.width;
        t->nr = height / t->f.height;
        if (t->nc < 1 || t->nr < 1)
                return(NULL);
        if ((t->lp = (char **)calloc(t->nr+1, sizeof(char *))) == NULL)
                return(NULL);
        for (i = 0; i < t->nr; i++)
                if ((t->lp[i] = calloc(t->nc+1, 1)) == NULL)
                        return(NULL);
        t->r = t->c = 0;
        t->cursor = TNOCURS;
        return(t);
}


xt_puts(s, t)                           /* output a string */
register char  *s;
TEXTWIND  *t;
{
        int  oldcurs = xt_cursor(t, TNOCURS);

        while (*s)
                xt_putc(*s++, t);
        xt_cursor(t, oldcurs);
}


xt_putc(c, t)                           /* output a character */
char  c;
register TEXTWIND  *t;
{
        int  oldcurs = xt_cursor(t, TNOCURS);

        switch (c) {
        case '\n':
                if (t->r >= t->nr - 1)
                        xt_delete(t, 0);        /* scroll up 1 line */
                else
                        t->r++;
        /* fall through */
        case '\r':
                t->c = 0;
                break;
        case '\b':
                while (t->c < 1 && t->r > 0)
                        t->c = strlen(t->lp[--t->r]);
                if (t->c > 0)
                        t->c--;
                break;
        default:
                if (t->c >= t->nc)
                        xt_putc('\n', t);
                XText(t->w, LEFTMAR + t->c*t->f.width, t->r*t->f.height,
                                &c, 1, t->f.id, BlackPixel, WhitePixel);
                t->lp[t->r][t->c++] = c;
                break;
        }
        xt_cursor(t, oldcurs);
}


xt_delete(t, r)                         /* delete a line */
register TEXTWIND  *t;
int  r;
{
        char  *cp;
        register int  i;

        if (r < 0 || r >= t->nr)
                return;
        checkcurs(t);
                                        /* move lines */
        XMoveArea(t->w, LEFTMAR, (r+1)*t->f.height, LEFTMAR, r*t->f.height,
                        t->nc*t->f.width, (t->nr-1-r)*t->f.height);
        cp = t->lp[r];
        for (i = r; i < t->nr-1; i++)
                t->lp[i] = t->lp[i+1];
        t->lp[t->nr-1] = cp;
                                        /* clear bottom */
        XPixSet(t->w, LEFTMAR, (t->nr-1)*t->f.height,
                        t->nc*t->f.width, t->f.height, WhitePixel);
        bzero(cp, t->nc);
        restorecurs(t);                 /* should we reposition cursor? */
}


xt_insert(t, r)                         /* insert a line */
register TEXTWIND  *t;
int  r;
{
        char  *cp;
        register int  i;

        if (r < 0 || r >= t->nr)
                return;
        checkcurs(t);
                                        /* move lines */
        XMoveArea(t->w, LEFTMAR, r*t->f.height, LEFTMAR, (r+1)*t->f.height,
                        t->nc*t->f.width, (t->nr-1-r)*t->f.height);
        cp = t->lp[t->nr-1];
        for (i = t->nr-1; i > r; i--)
                t->lp[i] = t->lp[i-1];
        t->lp[r] = cp;
                                        /* clear new line */
        XPixSet(t->w, LEFTMAR, r*t->f.height,
                        t->nc*t->f.width, t->f.height, WhitePixel);
        bzero(cp, t->nc);
        restorecurs(t);                 /* should we reposition cursor? */
}


xt_redraw(t)                            /* redraw text window */
register TEXTWIND  *t;
{
        register int  i;

        checkcurs(t);
        XClear(t->w);
        for (i = 0; i < t->nr; i++)
                XText(t->w, LEFTMAR, i*t->f.height, t->lp[i], strlen(t->lp[i]),
                                t->f.id, BlackPixel, WhitePixel);
        restorecurs(t);
}


xt_clear(t)                             /* clear text window */
register TEXTWIND  *t;
{
        register int  i;

        checkcurs(t);
        XClear(t->w);
        for (i = 0; i < t->nr; i++)
                bzero(t->lp[i], t->nc);
        t->r = t->c = 0;
        restorecurs(t);
}


xt_move(t, r, c)                        /* move to new position */
register TEXTWIND  *t;
int  r, c;
{
        if (r < 0 || c < 0 || r >= t->nr || c >= t->nc)
                return;
        checkcurs(t);
        t->r = r;
        t->c = c;
        restorecurs(t);
}


int
xt_cursor(t, curs)                      /* change cursor */
register TEXTWIND  *t;
register int  curs;
{
        register int    oldcurs;

        if (curs != TNOCURS && curs != TBLKCURS)
                return(-1);
        oldcurs = t->cursor;
        if (curs != oldcurs)
                togglecurs(t);
        t->cursor = curs;
        return(oldcurs);
}


xt_close(t)                             /* close text window */
register TEXTWIND  *t;
{
        register int  i;

        XFreeFont(t->f.id);
        XDestroyWindow(t->w);
        for (i = 0; i < t->nr; i++)
                free(t->lp[i]);
        free((char *)t->lp);
        free((char *)t);
}
Revision:	1.3
Committed:	Thu Jan 18 23:58:59 1990 UTC (35 years, 3 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.2:	+5 -0 lines
Log Message:	improved portability of bcopy()
#	User	Rev	Content
1	greg	1.1	/* Copyright (c) 1987 Regents of the University of California */
2
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* xtwind.c - routines for X text windows.
9			*
10			* 10/30/87
11			*/
12
13			#include <stdio.h>
14
15			#include <X/Xlib.h>
16
17			#include "xtwind.h"
18
19	greg	1.3	#ifndef BSD
20			#define bzero(d,n) (void)memset(d,0,n)
21			extern char *memset();
22			#endif
23
24	greg	1.1	#define checkcurs(t) if ((t)->cursor) togglecurs(t)
25
26			#define restorecurs checkcurs
27
28			#define togglecurs(t) XPixFill((t)->w, (t)->c*(t)->f.width+LEFTMAR, \
29			(t)->r*(t)->f.height, (t)->f.width, \
30			(t)->f.height, 0, 0, GXinvert, 1)
31
32			extern char calloc(), malloc();
33
34
35			TEXTWIND *
36			xt_open(parent, x, y, width, height, border, fontname)
37			Window parent;
38			int x, y;
39			int width, height;
40			int border;
41			char *fontname;
42			{
43			register int i;
44			register TEXTWIND *t;
45
46			if ((t = (TEXTWIND *)malloc(sizeof(TEXTWIND))) == NULL)
47			return(NULL);
48			t->w = XCreateWindow(parent, x, y, width, height,
49			border, BlackPixmap, WhitePixmap);
50			if (t->w == 0)
51			return(NULL);
52			XMapWindow(t->w);
53			if ((i = XGetFont(fontname)) == 0)
54			return(NULL);
55			if (XQueryFont(i, &t->f) == 0)
56			return(NULL);
57			if (!t->f.fixedwidth)
58			return(NULL);
59			t->nc = (width - LEFTMAR) / t->f.width;
60			t->nr = height / t->f.height;
61			if (t->nc < 1 \|\| t->nr < 1)
62			return(NULL);
63			if ((t->lp = (char *)calloc(t->nr+1, sizeof(char ))) == NULL)
64			return(NULL);
65			for (i = 0; i < t->nr; i++)
66			if ((t->lp[i] = calloc(t->nc+1, 1)) == NULL)
67			return(NULL);
68			t->r = t->c = 0;
69			t->cursor = TNOCURS;
70			return(t);
71			}
72
73
74			xt_puts(s, t) /* output a string */
75			register char *s;
76			TEXTWIND *t;
77			{
78			int oldcurs = xt_cursor(t, TNOCURS);
79
80			while (*s)
81			xt_putc(*s++, t);
82			xt_cursor(t, oldcurs);
83			}
84
85
86			xt_putc(c, t) /* output a character */
87			char c;
88			register TEXTWIND *t;
89			{
90			int oldcurs = xt_cursor(t, TNOCURS);
91
92			switch (c) {
93			case '\n':
94			if (t->r >= t->nr - 1)
95			xt_delete(t, 0); /* scroll up 1 line */
96	greg	1.2	else
97	greg	1.1	t->r++;
98			/* fall through */
99			case '\r':
100			t->c = 0;
101			break;
102			case '\b':
103			while (t->c < 1 && t->r > 0)
104			t->c = strlen(t->lp[--t->r]);
105			if (t->c > 0)
106			t->c--;
107			break;
108			default:
109			if (t->c >= t->nc)
110			xt_putc('\n', t);
111			XText(t->w, LEFTMAR + t->ct->f.width, t->rt->f.height,
112			&c, 1, t->f.id, BlackPixel, WhitePixel);
113			t->lp[t->r][t->c++] = c;
114			break;
115			}
116			xt_cursor(t, oldcurs);
117			}
118
119
120			xt_delete(t, r) /* delete a line */
121			register TEXTWIND *t;
122			int r;
123			{
124			char *cp;
125			register int i;
126
127			if (r < 0 \|\| r >= t->nr)
128			return;
129			checkcurs(t);
130			/* move lines */
131			XMoveArea(t->w, LEFTMAR, (r+1)t->f.height, LEFTMAR, rt->f.height,
132			t->nct->f.width, (t->nr-1-r)t->f.height);
133			cp = t->lp[r];
134			for (i = r; i < t->nr-1; i++)
135			t->lp[i] = t->lp[i+1];
136			t->lp[t->nr-1] = cp;
137			/* clear bottom */
138			XPixSet(t->w, LEFTMAR, (t->nr-1)*t->f.height,
139			t->nc*t->f.width, t->f.height, WhitePixel);
140			bzero(cp, t->nc);
141			restorecurs(t); /* should we reposition cursor? */
142			}
143
144
145			xt_insert(t, r) /* insert a line */
146			register TEXTWIND *t;
147			int r;
148			{
149			char *cp;
150			register int i;
151
152			if (r < 0 \|\| r >= t->nr)
153			return;
154			checkcurs(t);
155			/* move lines */
156			XMoveArea(t->w, LEFTMAR, rt->f.height, LEFTMAR, (r+1)t->f.height,
157			t->nct->f.width, (t->nr-1-r)t->f.height);
158			cp = t->lp[t->nr-1];
159			for (i = t->nr-1; i > r; i--)
160			t->lp[i] = t->lp[i-1];
161			t->lp[r] = cp;
162			/* clear new line */
163			XPixSet(t->w, LEFTMAR, r*t->f.height,
164			t->nc*t->f.width, t->f.height, WhitePixel);
165			bzero(cp, t->nc);
166			restorecurs(t); /* should we reposition cursor? */
167			}
168
169
170			xt_redraw(t) /* redraw text window */
171			register TEXTWIND *t;
172			{
173			register int i;
174
175			checkcurs(t);
176			XClear(t->w);
177			for (i = 0; i < t->nr; i++)
178			XText(t->w, LEFTMAR, i*t->f.height, t->lp[i], strlen(t->lp[i]),
179			t->f.id, BlackPixel, WhitePixel);
180			restorecurs(t);
181			}
182
183
184			xt_clear(t) /* clear text window */
185			register TEXTWIND *t;
186			{
187			register int i;
188
189			checkcurs(t);
190			XClear(t->w);
191			for (i = 0; i < t->nr; i++)
192			bzero(t->lp[i], t->nc);
193			t->r = t->c = 0;
194			restorecurs(t);
195			}
196
197
198			xt_move(t, r, c) /* move to new position */
199			register TEXTWIND *t;
200			int r, c;
201			{
202			if (r < 0 \|\| c < 0 \|\| r >= t->nr \|\| c >= t->nc)
203			return;
204			checkcurs(t);
205			t->r = r;
206			t->c = c;
207			restorecurs(t);
208			}
209
210
211			int
212			xt_cursor(t, curs) /* change cursor */
213			register TEXTWIND *t;
214			register int curs;
215			{
216			register int oldcurs;
217
218			if (curs != TNOCURS && curs != TBLKCURS)
219			return(-1);
220			oldcurs = t->cursor;
221			if (curs != oldcurs)
222			togglecurs(t);
223			t->cursor = curs;
224			return(oldcurs);
225			}
226
227
228			xt_close(t) /* close text window */
229			register TEXTWIND *t;
230			{
231			register int i;
232
233			XFreeFont(t->f.id);
234			XDestroyWindow(t->w);
235			for (i = 0; i < t->nr; i++)
236			free(t->lp[i]);
237			free((char *)t->lp);
238			free((char *)t);
239			}