src/rt/x11twind.c

#ifndef lint
static const char       RCSid[] = "$Id: x11twind.c,v 2.11 2024/05/23 22:49:20 greg Exp $";
#endif
/*
 *  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 "copyright.h"

#include  <stdio.h>
#include  <stdlib.h>
#include  <string.h>
#include  <X11/Xlib.h>

#include  "x11twind.h"

#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)

static void  togglecurs(TEXTWIND  *t);


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

}


void
xt_putc(                                /* output a character */
int  c,
TEXTWIND  *t
)
{
        char    ch[2];

        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);
                ch[0] = c; ch[1] = '\0';
                XDrawImageString(t->dpy, t->w, t->gc, LEFTMAR+t->c*Width(t->f), 
                        YStart(t->f)+t->r*Height(t->f), ch, 1);
                t->lp[t->r][t->c++] = c;
                break;
        }
        restorecurs(t);
}


void
xt_puts(const char *s, TEXTWIND *t)                             /* output a string */
{
        int     oldcurs;

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


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

        memset(cp, '\0', t->nc);
        restorecurs(t);                 /* should we reposition cursor? */
}


void
xt_insert(                      /* insert a line */
TEXTWIND  *t,
int  r
)
{
        char  *cp;
        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);
        memset(cp, '\0', t->nc);
        restorecurs(t);                 /* should we reposition cursor? */
}


void
xt_redraw(TEXTWIND  *t)                         /* redraw text window */
{
        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);
}


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

        XClearWindow(t->dpy, t->w);
        for (i = 0; i < t->nr; i++)
                memset(t->lp[i], '\0', t->nc);
        t->r = t->c = 0;
        restorecurs(t);
}


void
xt_move(                        /* move to new position */
TEXTWIND  *t,
int  r, int 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(                      /* change cursor */
TEXTWIND  *t,
int  curs
)
{
        int     oldcurs;

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


void
xt_close(TEXTWIND  *t)                          /* close text window */
{
        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((void *)t->lp);
        free((void *)t);
}


static void
togglecurs(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:	2.12
Committed:	Tue Dec 3 19:36:58 2024 UTC (4 months, 4 weeks ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 2.11:	+5 -5 lines
Log Message:	perf: Minor conditional optimizations
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.12	static const char RCSid[] = "$Id: x11twind.c,v 2.11 2024/05/23 22:49:20 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* x11twind.c - routines for X11 text windows.
6			*
7			* Written by G. Ward
8			* 10/30/87
9			*
10			* Modified for X11 by B. V. Smith
11			* 9/26/88
12			*/
13
14	greg	2.6	#include "copyright.h"
15	greg	2.5
16	greg	1.1	#include <stdio.h>
17	greg	2.5	#include <stdlib.h>
18	schorsch	2.9	#include <string.h>
19	greg	1.1	#include <X11/Xlib.h>
20
21			#include "x11twind.h"
22
23			#define checkcurs(t) if ((t)->cursor) togglecurs(t)
24
25			#define restorecurs checkcurs
26
27			/* width/height of a character in fontstruct f */
28			#define Width(f) ((f)->max_bounds.rbearing - (f)->min_bounds.lbearing)
29			#define Height(f) ((f)->ascent + (f)->descent)
30			#define YStart(f) ((f)->ascent)
31
32	greg	2.11	static void togglecurs(TEXTWIND *t);
33	greg	2.3
34	greg	1.1
35			TEXTWIND *
36	greg	2.10	xt_open(
37			Display *dpy,
38			Window parent,
39			int x, int y,
40			int width, int height,
41			int bw,
42			unsigned long fore, unsigned long back,
43			char *fontname
44			)
45	greg	1.1	{
46	greg	2.10	int i;
47			TEXTWIND *t;
48	greg	1.1
49			if ((t = (TEXTWIND *)malloc(sizeof(TEXTWIND))) == NULL)
50			return(NULL);
51
52			t->dpy = dpy;
53	greg	2.2	t->w = XCreateSimpleWindow(dpy, parent, x, y, width, height,
54			bw, fore, back);
55	greg	1.1	if (t->w == 0)
56			return(NULL);
57			XMapWindow(dpy, t->w);
58
59			if ((t->f = XLoadQueryFont(dpy, fontname)) == 0)
60			return(NULL);
61
62			/* if (!t->f.fixedwidth) check for fixedwidth later
63			return(NULL); */
64	greg	2.2
65	greg	1.1	t->gc = XCreateGC(dpy,t->w,0,NULL);
66	greg	2.2	XSetState(dpy, t->gc, fore, back, GXcopy, AllPlanes);
67	greg	1.1	XSetFont(dpy, t->gc, t->f->fid);
68
69			t->nc = (width - LEFTMAR) /
70			Width(t->f); /* number of columns */
71			t->nr = height /
72			Height(t->f); /* number of rows */
73	greg	2.12	if ((t->nc < 1) \| (t->nr < 1))
74	greg	1.1	return(NULL);
75			if ((t->lp = (char *)calloc(t->nr, sizeof(char ))) == NULL)
76			return(NULL);
77			for (i = 0; i < t->nr; i++)
78			if ((t->lp[i] = calloc(t->nc+1, 1)) == NULL)
79			return(NULL);
80			t->r = t->c = 0;
81			t->cursor = TNOCURS;
82			return(t);
83
84			}
85
86
87	greg	2.5	void
88	greg	2.10	xt_putc( /* output a character */
89			int c,
90			TEXTWIND *t
91			)
92	greg	1.1	{
93	greg	2.8	char ch[2];
94
95	greg	1.1	checkcurs(t);
96			switch (c) {
97			case '\n':
98			if (t->r >= t->nr - 1)
99			xt_delete(t, 0); /* scroll up 1 line */
100			else if (t->r < t->nr - 1)
101			t->r++;
102			/* fall through */
103			case '\r':
104			t->c = 0;
105			break;
106			case '\b':
107			while (t->c < 1 && t->r > 0)
108			t->c = strlen(t->lp[--t->r]);
109			if (t->c > 0)
110			t->c--;
111			break;
112			default:
113			if (t->c >= t->nc)
114			xt_putc('\n', t);
115	greg	2.8	ch[0] = c; ch[1] = '\0';
116	greg	1.1	XDrawImageString(t->dpy, t->w, t->gc, LEFTMAR+t->c*Width(t->f),
117	greg	2.8	YStart(t->f)+t->r*Height(t->f), ch, 1);
118	greg	1.1	t->lp[t->r][t->c++] = c;
119			break;
120			}
121			restorecurs(t);
122	greg	2.7	}
123
124
125			void
126	greg	2.10	xt_puts(const char s, TEXTWIND t) /* output a string */
127	greg	2.7	{
128			int oldcurs;
129
130			oldcurs = xt_cursor(t, TNOCURS); /* for efficiency */
131			while (*s)
132			xt_putc(*s++, t);
133			xt_cursor(t, oldcurs);
134	greg	1.1	}
135
136
137	greg	2.5	void
138	greg	2.10	xt_delete( /* delete a line */
139			TEXTWIND *t,
140			int r
141			)
142	greg	1.1	{
143			char *cp;
144	greg	2.10	int i;
145	greg	1.1
146	greg	2.12	if ((r < 0) \| (r >= t->nr))
147	greg	1.1	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	schorsch	2.9	memset(cp, '\0', t->nc);
162	greg	1.1	restorecurs(t); /* should we reposition cursor? */
163			}
164
165
166	greg	2.5	void
167	greg	2.10	xt_insert( /* insert a line */
168			TEXTWIND *t,
169			int r
170			)
171	greg	1.1	{
172			char *cp;
173	greg	2.10	int i;
174	greg	1.1
175	greg	2.12	if ((r < 0) \| (r >= t->nr))
176	greg	1.1	return;
177			checkcurs(t);
178			/* move lines */
179			XCopyArea(t->dpy, t->w, t->w, t->gc, LEFTMAR, r*Height(t->f), LEFTMAR,
180			(r+1)Height(t->f), t->ncWidth(t->f),
181			(t->nr-1-r)*Height(t->f));
182			cp = t->lp[t->nr-1];
183			for (i = t->nr-1; i > r; i--)
184			t->lp[i] = t->lp[i-1];
185			t->lp[r] = cp;
186			/* clear new line */
187			XClearArea(t->dpy, t->w, LEFTMAR, r*Height(t->f),
188			t->nc*Width(t->f), Height(t->f), (Bool) 0);
189	schorsch	2.9	memset(cp, '\0', t->nc);
190	greg	1.1	restorecurs(t); /* should we reposition cursor? */
191			}
192
193
194	greg	2.5	void
195	greg	2.10	xt_redraw(TEXTWIND t) / redraw text window */
196	greg	1.1	{
197	greg	2.10	int i;
198	greg	1.1
199			XClearWindow(t->dpy, t->w);
200			for (i = 0; i < t->nr; i++)
201			if (strlen(t->lp[i]) > 0)
202			XDrawImageString(t->dpy, t->w, t->gc, LEFTMAR,
203			YStart(t->f)+i*Height(t->f),
204			t->lp[i], strlen(t->lp[i]));
205			restorecurs(t);
206			}
207
208
209	greg	2.5	void
210	greg	2.10	xt_clear(TEXTWIND t) / clear text window */
211	greg	1.1	{
212	greg	2.10	int i;
213	greg	1.1
214			XClearWindow(t->dpy, t->w);
215			for (i = 0; i < t->nr; i++)
216	schorsch	2.9	memset(t->lp[i], '\0', t->nc);
217	greg	1.1	t->r = t->c = 0;
218			restorecurs(t);
219			}
220
221
222	greg	2.5	void
223	greg	2.10	xt_move( /* move to new position */
224			TEXTWIND *t,
225			int r, int c
226			)
227	greg	1.1	{
228	greg	2.12	if ((r < 0) \| (c < 0) \| (r >= t->nr) \| (c >= t->nc))
229	greg	1.1	return;
230			checkcurs(t);
231			t->r = r;
232			t->c = c;
233			restorecurs(t);
234			}
235
236
237			int
238	greg	2.10	xt_cursor( /* change cursor */
239			TEXTWIND *t,
240			int curs
241			)
242	greg	1.1	{
243	greg	2.10	int oldcurs;
244	greg	1.1
245			if (curs != TNOCURS && curs != TBLKCURS)
246			return(-1);
247			oldcurs = t->cursor;
248			if (curs != oldcurs)
249			togglecurs(t);
250			t->cursor = curs;
251			return(oldcurs);
252			}
253
254
255	greg	2.5	void
256	greg	2.10	xt_close(TEXTWIND t) / close text window */
257	greg	1.1	{
258	greg	2.10	int i;
259	greg	1.1
260			XFreeFont(t->dpy, t->f);
261			XFreeGC(t->dpy,t->gc);
262			XDestroyWindow(t->dpy, t->w);
263			for (i = 0; i < t->nr; i++)
264			free(t->lp[i]);
265	greg	2.5	free((void *)t->lp);
266			free((void *)t);
267	greg	1.1	}
268
269
270	greg	2.5	static void
271	greg	2.10	togglecurs(TEXTWIND *t)
272	greg	1.1	{
273			XSetFunction(t->dpy, t->gc, GXinvert);
274			XSetPlaneMask(t->dpy, t->gc, 1L);
275			XFillRectangle(t->dpy, t->w, t->gc,
276			t->cWidth(t->f)+LEFTMAR, t->rHeight(t->f),
277			Width(t->f), Height(t->f));
278			XSetFunction(t->dpy, t->gc, GXcopy);
279			XSetPlaneMask(t->dpy, t->gc, ~0L);
280			}