src/rt/x11twind.c

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

/* Copyright (c) 1989 Regents of the University of California */

/*
 *  x11twind.c - routines for X11 text windows.
 *
 *  Written by G. Ward
 *      10/30/87
 *
 *  Modified for X11 by B. V. Smith
 *      9/26/88
 */

#include  <stdio.h>

#include  <X11/Xlib.h>

#include  "x11twind.h"

#ifndef  BSD
#define  bzero(d,n)             (void)memset(d,0,n)
#endif

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

#define restorecurs             checkcurs

/* width/height of a character in fontstruct f */
#define Width(f)                ((f)->max_bounds.rbearing - (f)->min_bounds.lbearing)
#define Height(f)               ((f)->ascent + (f)->descent)
#define YStart(f)               ((f)->ascent)

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

static  togglecurs();


TEXTWIND *
xt_open(dpy, parent, x, y, width, height, bw, fore, back, fontname)
Display  *dpy;
Window  parent;
int  x, y;
int  width, height;
int  bw;
unsigned long  fore, back;
char  *fontname;
{
        register int  i;
        register TEXTWIND  *t;

        if ((t = (TEXTWIND *)malloc(sizeof(TEXTWIND))) == NULL)
                return(NULL);

        t->dpy = dpy;
        t->w = XCreateSimpleWindow(dpy, parent, x, y, width, height,
                                        bw, fore, back);
        if (t->w == 0)
                return(NULL);
        XMapWindow(dpy, t->w);

        if ((t->f = XLoadQueryFont(dpy, fontname)) == 0)
                return(NULL);

        /* if (!t->f.fixedwidth)   check for fixedwidth later 
                return(NULL); */

        t->gc = XCreateGC(dpy,t->w,0,NULL);
        XSetState(dpy, t->gc, fore, back, GXcopy, AllPlanes);
        XSetFont(dpy, t->gc, t->f->fid);

        t->nc = (width - LEFTMAR) / 
                Width(t->f);            /* number of columns */
        t->nr = height /
                Height(t->f);           /* number of rows */
        if (t->nc < 1 || t->nr < 1)
                return(NULL);
        if ((t->lp = (char **)calloc(t->nr, 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;

        oldcurs = xt_cursor(t, TNOCURS);        /* for efficiency */
        while (*s)
                xt_putc(*s++, t);
        xt_cursor(t, oldcurs);
}


xt_putc(c, t)                           /* output a character */
char  c;
register TEXTWIND  *t;
{
        checkcurs(t);
        switch (c) {
        case '\n':
                if (t->r >= t->nr - 1)
                        xt_delete(t, 0);        /* scroll up 1 line */
                else if (t->r < t->nr - 1)
                        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);
                XDrawImageString(t->dpy, t->w, t->gc, LEFTMAR+t->c*Width(t->f), 
                        YStart(t->f)+t->r*Height(t->f), &c, 1);
                t->lp[t->r][t->c++] = c;
                break;
        }
        restorecurs(t);
}


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 */
        XCopyArea(t->dpy, t->w, t->w, t->gc, LEFTMAR, (r+1)*Height(t->f),
                        t->nc*Width(t->f), (t->nr-1-r)*Height(t->f),
                        LEFTMAR, r*Height(t->f));
        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 */
        XClearArea(t->dpy, t->w, LEFTMAR, (t->nr-1)*Height(t->f),
                        t->nc*Width(t->f), Height(t->f),(Bool) 0);

        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 */
        XCopyArea(t->dpy, t->w, t->w, t->gc, LEFTMAR, r*Height(t->f), LEFTMAR,
                        (r+1)*Height(t->f), t->nc*Width(t->f),
                        (t->nr-1-r)*Height(t->f));
        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 */
        XClearArea(t->dpy, t->w, LEFTMAR, r*Height(t->f),
                        t->nc*Width(t->f), Height(t->f), (Bool) 0);
        bzero(cp, t->nc);
        restorecurs(t);                 /* should we reposition cursor? */
}


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

        XClearWindow(t->dpy, t->w);
        for (i = 0; i < t->nr; i++)
            if (strlen(t->lp[i]) > 0)
                XDrawImageString(t->dpy, t->w, t->gc, LEFTMAR, 
                                YStart(t->f)+i*Height(t->f),
                                t->lp[i], strlen(t->lp[i]));
        restorecurs(t);
}


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

        XClearWindow(t->dpy, 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->dpy, t->f);
        XFreeGC(t->dpy,t->gc);
        XDestroyWindow(t->dpy, t->w);
        for (i = 0; i < t->nr; i++)
                free(t->lp[i]);
        free((char *)t->lp);
        free((char *)t);
}


static
togglecurs(t)
register TEXTWIND  *t;
{
        XSetFunction(t->dpy, t->gc, GXinvert);
        XSetPlaneMask(t->dpy, t->gc, 1L);
        XFillRectangle(t->dpy, t->w, t->gc, 
                        t->c*Width(t->f)+LEFTMAR, t->r*Height(t->f),
                        Width(t->f), Height(t->f));
        XSetFunction(t->dpy, t->gc, GXcopy);
        XSetPlaneMask(t->dpy, t->gc, ~0L);
}
Revision:	2.4
Committed:	Wed Jun 17 13:34:10 1998 UTC (25 years, 10 months ago) by gwlarson
Content type:	text/plain
Branch:	MAIN
Changes since 2.3:	+0 -1 lines
Log Message:	got rid of problematic memset() declaration
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2			static char SCCSid[] = "$SunId$ LBL";
3			#endif
4
5			/* Copyright (c) 1989 Regents of the University of California */
6
7			/*
8			* x11twind.c - routines for X11 text windows.
9			*
10			* Written by G. Ward
11			* 10/30/87
12			*
13			* Modified for X11 by B. V. Smith
14			* 9/26/88
15			*/
16
17			#include <stdio.h>
18
19			#include <X11/Xlib.h>
20
21			#include "x11twind.h"
22
23	greg	1.2	#ifndef BSD
24			#define bzero(d,n) (void)memset(d,0,n)
25			#endif
26
27	greg	1.1	#define checkcurs(t) if ((t)->cursor) togglecurs(t)
28
29			#define restorecurs checkcurs
30
31			/* width/height of a character in fontstruct f */
32			#define Width(f) ((f)->max_bounds.rbearing - (f)->min_bounds.lbearing)
33			#define Height(f) ((f)->ascent + (f)->descent)
34			#define YStart(f) ((f)->ascent)
35
36			extern char calloc(), malloc();
37
38	greg	2.3	static togglecurs();
39
40	greg	1.1
41			TEXTWIND *
42	greg	2.2	xt_open(dpy, parent, x, y, width, height, bw, fore, back, fontname)
43			Display *dpy;
44			Window parent;
45			int x, y;
46			int width, height;
47			int bw;
48			unsigned long fore, back;
49			char *fontname;
50	greg	1.1	{
51			register int i;
52			register TEXTWIND *t;
53
54			if ((t = (TEXTWIND *)malloc(sizeof(TEXTWIND))) == NULL)
55			return(NULL);
56
57			t->dpy = dpy;
58	greg	2.2	t->w = XCreateSimpleWindow(dpy, parent, x, y, width, height,
59			bw, fore, back);
60	greg	1.1	if (t->w == 0)
61			return(NULL);
62			XMapWindow(dpy, t->w);
63
64			if ((t->f = XLoadQueryFont(dpy, fontname)) == 0)
65			return(NULL);
66
67			/* if (!t->f.fixedwidth) check for fixedwidth later
68			return(NULL); */
69	greg	2.2
70	greg	1.1	t->gc = XCreateGC(dpy,t->w,0,NULL);
71	greg	2.2	XSetState(dpy, t->gc, fore, back, GXcopy, AllPlanes);
72	greg	1.1	XSetFont(dpy, t->gc, t->f->fid);
73
74			t->nc = (width - LEFTMAR) /
75			Width(t->f); /* number of columns */
76			t->nr = height /
77			Height(t->f); /* number of rows */
78			if (t->nc < 1 \|\| t->nr < 1)
79			return(NULL);
80			if ((t->lp = (char *)calloc(t->nr, sizeof(char ))) == NULL)
81			return(NULL);
82			for (i = 0; i < t->nr; i++)
83			if ((t->lp[i] = calloc(t->nc+1, 1)) == NULL)
84			return(NULL);
85			t->r = t->c = 0;
86			t->cursor = TNOCURS;
87			return(t);
88
89			}
90
91
92			xt_puts(s, t) /* output a string */
93			register char *s;
94			TEXTWIND *t;
95			{
96			int oldcurs;
97
98			oldcurs = xt_cursor(t, TNOCURS); /* for efficiency */
99			while (*s)
100			xt_putc(*s++, t);
101			xt_cursor(t, oldcurs);
102			}
103
104
105			xt_putc(c, t) /* output a character */
106			char c;
107			register TEXTWIND *t;
108			{
109			checkcurs(t);
110			switch (c) {
111			case '\n':
112			if (t->r >= t->nr - 1)
113			xt_delete(t, 0); /* scroll up 1 line */
114			else if (t->r < t->nr - 1)
115			t->r++;
116			/* fall through */
117			case '\r':
118			t->c = 0;
119			break;
120			case '\b':
121			while (t->c < 1 && t->r > 0)
122			t->c = strlen(t->lp[--t->r]);
123			if (t->c > 0)
124			t->c--;
125			break;
126			default:
127			if (t->c >= t->nc)
128			xt_putc('\n', t);
129			XDrawImageString(t->dpy, t->w, t->gc, LEFTMAR+t->c*Width(t->f),
130			YStart(t->f)+t->r*Height(t->f), &c, 1);
131			t->lp[t->r][t->c++] = c;
132			break;
133			}
134			restorecurs(t);
135			}
136
137
138			xt_delete(t, r) /* delete a line */
139			register TEXTWIND *t;
140			int r;
141			{
142			char *cp;
143			register int i;
144
145			if (r < 0 \|\| r >= t->nr)
146			return;
147			checkcurs(t);
148			/* move lines */
149			XCopyArea(t->dpy, t->w, t->w, t->gc, LEFTMAR, (r+1)*Height(t->f),
150			t->ncWidth(t->f), (t->nr-1-r)Height(t->f),
151			LEFTMAR, r*Height(t->f));
152			cp = t->lp[r];
153			for (i = r; i < t->nr-1; i++)
154			t->lp[i] = t->lp[i+1];
155			t->lp[t->nr-1] = cp;
156			/* clear bottom */
157			XClearArea(t->dpy, t->w, LEFTMAR, (t->nr-1)*Height(t->f),
158			t->nc*Width(t->f), Height(t->f),(Bool) 0);
159
160			bzero(cp, t->nc);
161			restorecurs(t); /* should we reposition cursor? */
162			}
163
164
165			xt_insert(t, r) /* insert a line */
166			register TEXTWIND *t;
167			int r;
168			{
169			char *cp;
170			register int i;
171
172			if (r < 0 \|\| r >= t->nr)
173			return;
174			checkcurs(t);
175			/* move lines */
176			XCopyArea(t->dpy, t->w, t->w, t->gc, LEFTMAR, r*Height(t->f), LEFTMAR,
177			(r+1)Height(t->f), t->ncWidth(t->f),
178			(t->nr-1-r)*Height(t->f));
179			cp = t->lp[t->nr-1];
180			for (i = t->nr-1; i > r; i--)
181			t->lp[i] = t->lp[i-1];
182			t->lp[r] = cp;
183			/* clear new line */
184			XClearArea(t->dpy, t->w, LEFTMAR, r*Height(t->f),
185			t->nc*Width(t->f), Height(t->f), (Bool) 0);
186			bzero(cp, t->nc);
187			restorecurs(t); /* should we reposition cursor? */
188			}
189
190
191			xt_redraw(t) /* redraw text window */
192			register TEXTWIND *t;
193			{
194			register int i;
195
196			XClearWindow(t->dpy, t->w);
197			for (i = 0; i < t->nr; i++)
198			if (strlen(t->lp[i]) > 0)
199			XDrawImageString(t->dpy, t->w, t->gc, LEFTMAR,
200			YStart(t->f)+i*Height(t->f),
201			t->lp[i], strlen(t->lp[i]));
202			restorecurs(t);
203			}
204
205
206			xt_clear(t) /* clear text window */
207			register TEXTWIND *t;
208			{
209			register int i;
210
211			XClearWindow(t->dpy, t->w);
212			for (i = 0; i < t->nr; i++)
213			bzero(t->lp[i], t->nc);
214			t->r = t->c = 0;
215			restorecurs(t);
216			}
217
218
219			xt_move(t, r, c) /* move to new position */
220			register TEXTWIND *t;
221			int r, c;
222			{
223			if (r < 0 \|\| c < 0 \|\| r >= t->nr \|\| c >= t->nc)
224			return;
225			checkcurs(t);
226			t->r = r;
227			t->c = c;
228			restorecurs(t);
229			}
230
231
232			int
233			xt_cursor(t, curs) /* change cursor */
234			register TEXTWIND *t;
235			register int curs;
236			{
237			register int oldcurs;
238
239			if (curs != TNOCURS && curs != TBLKCURS)
240			return(-1);
241			oldcurs = t->cursor;
242			if (curs != oldcurs)
243			togglecurs(t);
244			t->cursor = curs;
245			return(oldcurs);
246			}
247
248
249			xt_close(t) /* close text window */
250			register TEXTWIND *t;
251			{
252			register int i;
253
254			XFreeFont(t->dpy, t->f);
255			XFreeGC(t->dpy,t->gc);
256			XDestroyWindow(t->dpy, t->w);
257			for (i = 0; i < t->nr; i++)
258			free(t->lp[i]);
259			free((char *)t->lp);
260			free((char *)t);
261			}
262
263
264			static
265			togglecurs(t)
266			register TEXTWIND *t;
267			{
268			XSetFunction(t->dpy, t->gc, GXinvert);
269			XSetPlaneMask(t->dpy, t->gc, 1L);
270			XFillRectangle(t->dpy, t->w, t->gc,
271			t->cWidth(t->f)+LEFTMAR, t->rHeight(t->f),
272			Width(t->f), Height(t->f));
273			XSetFunction(t->dpy, t->gc, GXcopy);
274			XSetPlaneMask(t->dpy, t->gc, ~0L);
275			}