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();

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:	2.3
Committed:	Mon Mar 8 12:37:44 1993 UTC (31 years, 1 month ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.2:	+2 -0 lines
Log Message:	portability fixes (removed gcc warnings)
#	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	greg	2.3	static togglecurs();
40
41	greg	1.1
42			TEXTWIND *
43	greg	2.2	xt_open(dpy, parent, x, y, width, height, bw, fore, back, fontname)
44			Display *dpy;
45			Window parent;
46			int x, y;
47			int width, height;
48			int bw;
49			unsigned long fore, back;
50			char *fontname;
51	greg	1.1	{
52			register int i;
53			register TEXTWIND *t;
54
55			if ((t = (TEXTWIND *)malloc(sizeof(TEXTWIND))) == NULL)
56			return(NULL);
57
58			t->dpy = dpy;
59	greg	2.2	t->w = XCreateSimpleWindow(dpy, parent, x, y, width, height,
60			bw, fore, back);
61	greg	1.1	if (t->w == 0)
62			return(NULL);
63			XMapWindow(dpy, t->w);
64
65			if ((t->f = XLoadQueryFont(dpy, fontname)) == 0)
66			return(NULL);
67
68			/* if (!t->f.fixedwidth) check for fixedwidth later
69			return(NULL); */
70	greg	2.2
71	greg	1.1	t->gc = XCreateGC(dpy,t->w,0,NULL);
72	greg	2.2	XSetState(dpy, t->gc, fore, back, GXcopy, AllPlanes);
73	greg	1.1	XSetFont(dpy, t->gc, t->f->fid);
74
75			t->nc = (width - LEFTMAR) /
76			Width(t->f); /* number of columns */
77			t->nr = height /
78			Height(t->f); /* number of rows */
79			if (t->nc < 1 \|\| t->nr < 1)
80			return(NULL);
81			if ((t->lp = (char *)calloc(t->nr, sizeof(char ))) == NULL)
82			return(NULL);
83			for (i = 0; i < t->nr; i++)
84			if ((t->lp[i] = calloc(t->nc+1, 1)) == NULL)
85			return(NULL);
86			t->r = t->c = 0;
87			t->cursor = TNOCURS;
88			return(t);
89
90			}
91
92
93			xt_puts(s, t) /* output a string */
94			register char *s;
95			TEXTWIND *t;
96			{
97			int oldcurs;
98
99			oldcurs = xt_cursor(t, TNOCURS); /* for efficiency */
100			while (*s)
101			xt_putc(*s++, t);
102			xt_cursor(t, oldcurs);
103			}
104
105
106			xt_putc(c, t) /* output a character */
107			char c;
108			register TEXTWIND *t;
109			{
110			checkcurs(t);
111			switch (c) {
112			case '\n':
113			if (t->r >= t->nr - 1)
114			xt_delete(t, 0); /* scroll up 1 line */
115			else if (t->r < t->nr - 1)
116			t->r++;
117			/* fall through */
118			case '\r':
119			t->c = 0;
120			break;
121			case '\b':
122			while (t->c < 1 && t->r > 0)
123			t->c = strlen(t->lp[--t->r]);
124			if (t->c > 0)
125			t->c--;
126			break;
127			default:
128			if (t->c >= t->nc)
129			xt_putc('\n', t);
130			XDrawImageString(t->dpy, t->w, t->gc, LEFTMAR+t->c*Width(t->f),
131			YStart(t->f)+t->r*Height(t->f), &c, 1);
132			t->lp[t->r][t->c++] = c;
133			break;
134			}
135			restorecurs(t);
136			}
137
138
139			xt_delete(t, r) /* delete a line */
140			register TEXTWIND *t;
141			int r;
142			{
143			char *cp;
144			register int i;
145
146			if (r < 0 \|\| r >= t->nr)
147			return;
148			checkcurs(t);
149			/* move lines */
150			XCopyArea(t->dpy, t->w, t->w, t->gc, LEFTMAR, (r+1)*Height(t->f),
151			t->ncWidth(t->f), (t->nr-1-r)Height(t->f),
152			LEFTMAR, r*Height(t->f));
153			cp = t->lp[r];
154			for (i = r; i < t->nr-1; i++)
155			t->lp[i] = t->lp[i+1];
156			t->lp[t->nr-1] = cp;
157			/* clear bottom */
158			XClearArea(t->dpy, t->w, LEFTMAR, (t->nr-1)*Height(t->f),
159			t->nc*Width(t->f), Height(t->f),(Bool) 0);
160
161			bzero(cp, t->nc);
162			restorecurs(t); /* should we reposition cursor? */
163			}
164
165
166			xt_insert(t, r) /* insert a line */
167			register TEXTWIND *t;
168			int r;
169			{
170			char *cp;
171			register int i;
172
173			if (r < 0 \|\| r >= t->nr)
174			return;
175			checkcurs(t);
176			/* move lines */
177			XCopyArea(t->dpy, t->w, t->w, t->gc, LEFTMAR, r*Height(t->f), LEFTMAR,
178			(r+1)Height(t->f), t->ncWidth(t->f),
179			(t->nr-1-r)*Height(t->f));
180			cp = t->lp[t->nr-1];
181			for (i = t->nr-1; i > r; i--)
182			t->lp[i] = t->lp[i-1];
183			t->lp[r] = cp;
184			/* clear new line */
185			XClearArea(t->dpy, t->w, LEFTMAR, r*Height(t->f),
186			t->nc*Width(t->f), Height(t->f), (Bool) 0);
187			bzero(cp, t->nc);
188			restorecurs(t); /* should we reposition cursor? */
189			}
190
191
192			xt_redraw(t) /* redraw text window */
193			register TEXTWIND *t;
194			{
195			register int i;
196
197			XClearWindow(t->dpy, t->w);
198			for (i = 0; i < t->nr; i++)
199			if (strlen(t->lp[i]) > 0)
200			XDrawImageString(t->dpy, t->w, t->gc, LEFTMAR,
201			YStart(t->f)+i*Height(t->f),
202			t->lp[i], strlen(t->lp[i]));
203			restorecurs(t);
204			}
205
206
207			xt_clear(t) /* clear text window */
208			register TEXTWIND *t;
209			{
210			register int i;
211
212			XClearWindow(t->dpy, t->w);
213			for (i = 0; i < t->nr; i++)
214			bzero(t->lp[i], t->nc);
215			t->r = t->c = 0;
216			restorecurs(t);
217			}
218
219
220			xt_move(t, r, c) /* move to new position */
221			register TEXTWIND *t;
222			int r, c;
223			{
224			if (r < 0 \|\| c < 0 \|\| r >= t->nr \|\| c >= t->nc)
225			return;
226			checkcurs(t);
227			t->r = r;
228			t->c = c;
229			restorecurs(t);
230			}
231
232
233			int
234			xt_cursor(t, curs) /* change cursor */
235			register TEXTWIND *t;
236			register int curs;
237			{
238			register int oldcurs;
239
240			if (curs != TNOCURS && curs != TBLKCURS)
241			return(-1);
242			oldcurs = t->cursor;
243			if (curs != oldcurs)
244			togglecurs(t);
245			t->cursor = curs;
246			return(oldcurs);
247			}
248
249
250			xt_close(t) /* close text window */
251			register TEXTWIND *t;
252			{
253			register int i;
254
255			XFreeFont(t->dpy, t->f);
256			XFreeGC(t->dpy,t->gc);
257			XDestroyWindow(t->dpy, t->w);
258			for (i = 0; i < t->nr; i++)
259			free(t->lp[i]);
260			free((char *)t->lp);
261			free((char *)t);
262			}
263
264
265			static
266			togglecurs(t)
267			register TEXTWIND *t;
268			{
269			XSetFunction(t->dpy, t->gc, GXinvert);
270			XSetPlaneMask(t->dpy, t->gc, 1L);
271			XFillRectangle(t->dpy, t->w, t->gc,
272			t->cWidth(t->f)+LEFTMAR, t->rHeight(t->f),
273			Width(t->f), Height(t->f));
274			XSetFunction(t->dpy, t->gc, GXcopy);
275			XSetPlaneMask(t->dpy, t->gc, ~0L);
276			}