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)
extern char  *memset();
#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();


TEXTWIND *
xt_open(dpy, gc, parent, x, y, width, height, bw, fontname)
Display *dpy;
GC gc;
Window parent;
int x, y;
int width, height;
int bw;
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,
                                        BlackPixel(dpy,DefaultScreen(dpy)),
                                        WhitePixel(dpy,DefaultScreen(dpy)));
        /*
        t->w = XCreateWindow(dpy, parent, x, y, width, height, bw, 0,
                                CopyFromParent, CopyFromParent, 0, 0);
        */

        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);

        XCopyGC(dpy, gc, ~0L, t->gc);

        XSetFont(dpy, t->gc, t->f->fid);
        XSetFunction(dpy, t->gc, GXcopy);

        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:	1.2
Committed:	Fri Jan 19 00:00:35 1990 UTC (34 years, 3 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.1:	+5 -0 lines
Log Message:	improved portability and speed of bcopy()
#	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			extern char *memset();
26			#endif
27
28	greg	1.1	#define checkcurs(t) if ((t)->cursor) togglecurs(t)
29
30			#define restorecurs checkcurs
31
32			/* width/height of a character in fontstruct f */
33			#define Width(f) ((f)->max_bounds.rbearing - (f)->min_bounds.lbearing)
34			#define Height(f) ((f)->ascent + (f)->descent)
35			#define YStart(f) ((f)->ascent)
36
37			extern char calloc(), malloc();
38
39
40			TEXTWIND *
41			xt_open(dpy, gc, parent, x, y, width, height, bw, fontname)
42			Display *dpy;
43			GC gc;
44			Window parent;
45			int x, y;
46			int width, height;
47			int bw;
48			char *fontname;
49			{
50			register int i;
51			register TEXTWIND *t;
52
53			if ((t = (TEXTWIND *)malloc(sizeof(TEXTWIND))) == NULL)
54			return(NULL);
55
56			t->dpy = dpy;
57			t->w = XCreateSimpleWindow(dpy, parent, x, y, width, height, bw,
58			BlackPixel(dpy,DefaultScreen(dpy)),
59			WhitePixel(dpy,DefaultScreen(dpy)));
60			/*
61			t->w = XCreateWindow(dpy, parent, x, y, width, height, bw, 0,
62			CopyFromParent, CopyFromParent, 0, 0);
63			*/
64
65			if (t->w == 0)
66			return(NULL);
67			XMapWindow(dpy, t->w);
68
69			if ((t->f = XLoadQueryFont(dpy, fontname)) == 0)
70			return(NULL);
71
72			/* if (!t->f.fixedwidth) check for fixedwidth later
73			return(NULL); */
74			t->gc = XCreateGC(dpy,t->w,0,NULL);
75
76			XCopyGC(dpy, gc, ~0L, t->gc);
77
78			XSetFont(dpy, t->gc, t->f->fid);
79			XSetFunction(dpy, t->gc, GXcopy);
80
81			t->nc = (width - LEFTMAR) /
82			Width(t->f); /* number of columns */
83			t->nr = height /
84			Height(t->f); /* number of rows */
85			if (t->nc < 1 \|\| t->nr < 1)
86			return(NULL);
87			if ((t->lp = (char *)calloc(t->nr, sizeof(char ))) == NULL)
88			return(NULL);
89			for (i = 0; i < t->nr; i++)
90			if ((t->lp[i] = calloc(t->nc+1, 1)) == NULL)
91			return(NULL);
92			t->r = t->c = 0;
93			t->cursor = TNOCURS;
94			return(t);
95
96			}
97
98
99			xt_puts(s, t) /* output a string */
100			register char *s;
101			TEXTWIND *t;
102			{
103			int oldcurs;
104
105			oldcurs = xt_cursor(t, TNOCURS); /* for efficiency */
106			while (*s)
107			xt_putc(*s++, t);
108			xt_cursor(t, oldcurs);
109			}
110
111
112			xt_putc(c, t) /* output a character */
113			char c;
114			register TEXTWIND *t;
115			{
116			checkcurs(t);
117			switch (c) {
118			case '\n':
119			if (t->r >= t->nr - 1)
120			xt_delete(t, 0); /* scroll up 1 line */
121			else if (t->r < t->nr - 1)
122			t->r++;
123			/* fall through */
124			case '\r':
125			t->c = 0;
126			break;
127			case '\b':
128			while (t->c < 1 && t->r > 0)
129			t->c = strlen(t->lp[--t->r]);
130			if (t->c > 0)
131			t->c--;
132			break;
133			default:
134			if (t->c >= t->nc)
135			xt_putc('\n', t);
136			XDrawImageString(t->dpy, t->w, t->gc, LEFTMAR+t->c*Width(t->f),
137			YStart(t->f)+t->r*Height(t->f), &c, 1);
138			t->lp[t->r][t->c++] = c;
139			break;
140			}
141			restorecurs(t);
142			}
143
144
145			xt_delete(t, r) /* delete 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			XCopyArea(t->dpy, t->w, t->w, t->gc, LEFTMAR, (r+1)*Height(t->f),
157			t->ncWidth(t->f), (t->nr-1-r)Height(t->f),
158			LEFTMAR, r*Height(t->f));
159			cp = t->lp[r];
160			for (i = r; i < t->nr-1; i++)
161			t->lp[i] = t->lp[i+1];
162			t->lp[t->nr-1] = cp;
163			/* clear bottom */
164			XClearArea(t->dpy, t->w, LEFTMAR, (t->nr-1)*Height(t->f),
165			t->nc*Width(t->f), Height(t->f),(Bool) 0);
166
167			bzero(cp, t->nc);
168			restorecurs(t); /* should we reposition cursor? */
169			}
170
171
172			xt_insert(t, r) /* insert a line */
173			register TEXTWIND *t;
174			int r;
175			{
176			char *cp;
177			register int i;
178
179			if (r < 0 \|\| r >= t->nr)
180			return;
181			checkcurs(t);
182			/* move lines */
183			XCopyArea(t->dpy, t->w, t->w, t->gc, LEFTMAR, r*Height(t->f), LEFTMAR,
184			(r+1)Height(t->f), t->ncWidth(t->f),
185			(t->nr-1-r)*Height(t->f));
186			cp = t->lp[t->nr-1];
187			for (i = t->nr-1; i > r; i--)
188			t->lp[i] = t->lp[i-1];
189			t->lp[r] = cp;
190			/* clear new line */
191			XClearArea(t->dpy, t->w, LEFTMAR, r*Height(t->f),
192			t->nc*Width(t->f), Height(t->f), (Bool) 0);
193			bzero(cp, t->nc);
194			restorecurs(t); /* should we reposition cursor? */
195			}
196
197
198			xt_redraw(t) /* redraw text window */
199			register TEXTWIND *t;
200			{
201			register int i;
202
203			XClearWindow(t->dpy, t->w);
204			for (i = 0; i < t->nr; i++)
205			if (strlen(t->lp[i]) > 0)
206			XDrawImageString(t->dpy, t->w, t->gc, LEFTMAR,
207			YStart(t->f)+i*Height(t->f),
208			t->lp[i], strlen(t->lp[i]));
209			restorecurs(t);
210			}
211
212
213			xt_clear(t) /* clear text window */
214			register TEXTWIND *t;
215			{
216			register int i;
217
218			XClearWindow(t->dpy, t->w);
219			for (i = 0; i < t->nr; i++)
220			bzero(t->lp[i], t->nc);
221			t->r = t->c = 0;
222			restorecurs(t);
223			}
224
225
226			xt_move(t, r, c) /* move to new position */
227			register TEXTWIND *t;
228			int r, c;
229			{
230			if (r < 0 \|\| c < 0 \|\| r >= t->nr \|\| c >= t->nc)
231			return;
232			checkcurs(t);
233			t->r = r;
234			t->c = c;
235			restorecurs(t);
236			}
237
238
239			int
240			xt_cursor(t, curs) /* change cursor */
241			register TEXTWIND *t;
242			register int curs;
243			{
244			register int oldcurs;
245
246			if (curs != TNOCURS && curs != TBLKCURS)
247			return(-1);
248			oldcurs = t->cursor;
249			if (curs != oldcurs)
250			togglecurs(t);
251			t->cursor = curs;
252			return(oldcurs);
253			}
254
255
256			xt_close(t) /* close text window */
257			register TEXTWIND *t;
258			{
259			register int i;
260
261			XFreeFont(t->dpy, t->f);
262			XFreeGC(t->dpy,t->gc);
263			XDestroyWindow(t->dpy, t->w);
264			for (i = 0; i < t->nr; i++)
265			free(t->lp[i]);
266			free((char *)t->lp);
267			free((char *)t);
268			}
269
270
271			static
272			togglecurs(t)
273			register TEXTWIND *t;
274			{
275			XSetFunction(t->dpy, t->gc, GXinvert);
276			XSetPlaneMask(t->dpy, t->gc, 1L);
277			XFillRectangle(t->dpy, t->w, t->gc,
278			t->cWidth(t->f)+LEFTMAR, t->rHeight(t->f),
279			Width(t->f), Height(t->f));
280			XSetFunction(t->dpy, t->gc, GXcopy);
281			XSetPlaneMask(t->dpy, t->gc, ~0L);
282			}