src/rt/x11.c

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

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

/*
 *  x11.c - driver for X-windows version 11.3
 *
 *     Jan 1990
 */

#include  <stdio.h>

#include  <sys/ioctl.h>

#include  <X11/Xlib.h>
#include  <X11/cursorfont.h>
#include  <X11/Xutil.h>

#include  "color.h"
#include  "driver.h"
#include  "x11twind.h"

#define GAMMA           2.2             /* exponent for color correction */

#define MINWIDTH        (4*COMCW)       /* minimum graphics window width */
#define MINHEIGHT       16              /* minimum graphics window height */

#define BORWIDTH        5               /* border width */
#define COMHEIGHT       (COMLH*COMCH)   /* command line height (pixels) */

#define COMFN           "8x13"          /* command line font name */
#define COMLH           3               /* number of command lines */
#define COMCW           8               /* approx. character width (pixels) */
#define COMCH           14              /* approx. character height (pixels) */

#define  ourscreen      DefaultScreen(ourdisplay)
#define  ourroot        RootWindow(ourdisplay,ourscreen)
#define  ourwhite       WhitePixel(ourdisplay,ourscreen)
#define  ourblack       BlackPixel(ourdisplay,ourscreen)

#define  levptr(etype)  ((etype *)&currentevent)

static XEvent  currentevent;            /* current event */

static int  ncolors = 0;                /* color table size */
static int  *pixval = NULL;             /* allocated pixels */

static Display  *ourdisplay = NULL;     /* our display */

static Window  gwind = 0;               /* our graphics window */

static Cursor  pickcursor = 0;          /* cursor used for picking */

static int  gwidth, gheight;            /* graphics window size */

static TEXTWIND  *comline = NULL;       /* our command line */

static char  c_queue[64];               /* input queue */
static int  c_first = 0;                /* first character in queue */
static int  c_last = 0;                 /* last character in queue */

static GC  ourgc = 0;                   /* our graphics context for drawing */

static Colormap ourmap;                 /* our color map */

extern char  *malloc();

int  x11_close(), x11_clear(), x11_paintr(), x11_errout(),
                x11_getcur(), x11_comout(), x11_comin(), x11_flush();

static struct driver  x11_driver = {
        x11_close, x11_clear, x11_paintr, x11_getcur,
        x11_comout, x11_comin, x11_flush, 1.0
};


struct driver *
x11_init(name, id)              /* initialize driver */
char  *name, *id;
{
        XWMHints  ourxwmhints;
        Pixmap  bmCursorSrc, bmCursorMsk;

        ourdisplay = XOpenDisplay(NULL);
        if (ourdisplay == NULL) {
                stderr_v("cannot open X-windows; DISPLAY variable set?\n");
                return(NULL);
        }
        if (DisplayPlanes(ourdisplay, ourscreen) < 4) {
                stderr_v("not enough colors\n");
                return(NULL);
        }
        ourmap = DefaultColormap(ourdisplay,ourscreen);
        make_gmap(GAMMA);                       /* make color map */
        /* create a cursor */
        pickcursor = XCreateFontCursor (ourdisplay, XC_diamond_cross);
        /* open window */
        gwind = XCreateSimpleWindow(ourdisplay, ourroot, 0, 0,
                DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
                DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
                BORWIDTH, ourblack, ourwhite);
        if (gwind == 0) {
                stderr_v("cannot create window\n");
                return(NULL);
        }
        XStoreName(ourdisplay, gwind, id);
        ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
        ourxwmhints.flags = InputHint;
        ourxwmhints.input = True;
        XSetWMHints(ourdisplay, gwind, &ourxwmhints);
        XSelectInput(ourdisplay, gwind, ExposureMask);
        XMapWindow(ourdisplay, gwind);
        XWindowEvent(ourdisplay, gwind, ExposureMask, levptr(XExposeEvent));
        gwidth = levptr(XExposeEvent)->width;
        gheight = levptr(XExposeEvent)->height - COMHEIGHT;
        x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
        x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
        x11_driver.inpready = 0;
        cmdvec = x11_comout;                    /* set error vectors */
        if (wrnvec != NULL)
                wrnvec = x11_errout;
        return(&x11_driver);
}


static
x11_close()                     /* close our display */
{
        cmdvec = NULL;                          /* reset error vectors */
        if (wrnvec != NULL)
                wrnvec = stderr_v;
        if (ourdisplay == NULL)
                return;
        if (comline != NULL) {
                xt_close(comline);
                comline = NULL;
        }
        if (gwind != 0) {
                XFreeGC(ourdisplay, ourgc);
                XDestroyWindow(ourdisplay, gwind);
                gwind = 0;
                ourgc = 0;
        }
        XFreeCursor(ourdisplay, pickcursor);
        freepixels();
        XCloseDisplay(ourdisplay);
        ourdisplay = NULL;
}


static
x11_clear(xres, yres)                   /* clear our display */
int  xres, yres;
{
        if (xres != gwidth || yres != gheight) {        /* change window */
                if (comline != NULL)
                        xt_close(comline);
                XSelectInput(ourdisplay, gwind, 0);
                XResizeWindow(ourdisplay, gwind, xres, yres+COMHEIGHT);
                comline = xt_open(ourdisplay,
                                DefaultGC(ourdisplay,ourscreen),
                                gwind, 0, yres, xres, COMHEIGHT, 0, COMFN);
                if (comline == NULL) {
                        stderr_v("Cannot open command line window\n");
                        quit(1);
                }
                XSelectInput(ourdisplay, comline->w, ExposureMask);
                gwidth = xres;
                gheight = yres;
                XSync(ourdisplay, 1);           /* discard input */
                sleep(2);                       /* wait for window manager */
        }
        XClearWindow(ourdisplay, gwind);
                                                /* reinitialize color table */
        if (getpixels() == 0)
                stderr_v("cannot allocate colors\n");
        else
                new_ctab(ncolors);

        XSelectInput(ourdisplay, gwind,
                StructureNotifyMask|ExposureMask|KeyPressMask|ButtonPressMask);
}


static
x11_paintr(col, xmin, ymin, xmax, ymax)         /* fill a rectangle */
COLOR  col;
int  xmin, ymin, xmax, ymax;
{
        extern int  xnewcolr();         /* pixel assignment routine */

        if (ncolors > 0) {
                XSetForeground(ourdisplay, ourgc, 
                                pixval[get_pixel(col, xnewcolr)]);
                XFillRectangle(ourdisplay, gwind, 
                        ourgc, xmin, gheight-ymax, xmax-xmin, ymax-ymin);
        }
}


static
x11_flush()                     /* flush output */
{
        if (ncolors <= 0)       /* output necessary for death */
                XFillRectangle(ourdisplay, gwind, ourgc, 0, 0, 1 ,1);
        while (XPending(ourdisplay) > 0)
                getevent();
}


static
x11_comin(inp, prompt)          /* read in a command line */
char  *inp, *prompt;
{
        int  x11_getc(), x11_comout();

        if (prompt != NULL)
                if (fromcombuf(inp, &x11_driver))
                        return;
                else
                        xt_puts(prompt, comline);
        xt_cursor(comline, TBLKCURS);
        editline(inp, x11_getc, x11_comout);
        xt_cursor(comline, TNOCURS);
}


static
x11_comout(out)                 /* output a string to command line */
char  *out;
{
        if (comline != NULL)
                xt_puts(out, comline);
        XFlush(ourdisplay);
}


static
x11_errout(msg)                 /* output an error message */
char  *msg;
{
        x11_comout(msg);
        stderr_v(msg);          /* send to stderr also! */
}


static int
x11_getcur(xp, yp)              /* get cursor position */
int  *xp, *yp;
{
        while (XGrabPointer(ourdisplay, gwind, True, ButtonPressMask,
                        GrabModeAsync, GrabModeAsync, None, pickcursor,
                        CurrentTime) != GrabSuccess)
                sleep(2);

        do
                getevent();
        while (c_last <= c_first && levptr(XEvent)->type != ButtonPress);
        *xp = levptr(XButtonPressedEvent)->x;
        *yp = gheight-1 - levptr(XButtonPressedEvent)->y;
        XUngrabPointer(ourdisplay, CurrentTime);
        XFlush(ourdisplay);                             /* insure release */
        if (c_last > c_first)                   /* key pressed */
                return(x11_getc());
                                                /* button pressed */
        if (levptr(XButtonPressedEvent)->button & Button1)
                return(MB1);
        if (levptr(XButtonPressedEvent)->button & Button2)
                return(MB2);
        if (levptr(XButtonPressedEvent)->button & Button3)
                return(MB3);
        if (levptr(XButtonPressedEvent)->button & (Button4|Button5))
                return(MB1);
        return(ABORT);
}


static
xnewcolr(ndx, r, g, b)          /* enter a color into hardware table */
int  ndx;
int  r, g, b;
{
        XColor  xcolor;

        xcolor.pixel = pixval[ndx];
        xcolor.red = r << 8;
        xcolor.green = g << 8;
        xcolor.blue = b << 8;
        xcolor.flags = DoRed|DoGreen|DoBlue;

        XStoreColor(ourdisplay, ourmap, &xcolor);
}


static int
getpixels()                             /* get the color map */
{
        Visual  *ourvis = DefaultVisual(ourdisplay,ourscreen);

        if (ncolors > 0)
                return(ncolors);
        for (ncolors=(ourvis->map_entries)-3; ncolors>12; ncolors=ncolors*.937){
                pixval = (int *)malloc(ncolors*sizeof(int));
                if (pixval == NULL)
                        break;
                if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,
                                pixval,ncolors) != 0)
                        return(ncolors);
                free((char *)pixval);
        }
        return(ncolors = 0);
}


static
freepixels()                            /* free our pixels */
{
        if (ncolors == 0)
                return;
        XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
        ncolors = 0;
}


static int
x11_getc()                      /* get a command character */
{
        while (c_last <= c_first) {
                c_first = c_last = 0;           /* reset */
                getevent();                     /* wait for key */
        }
        x11_driver.inpready--;
        return(c_queue[c_first++]);
}


static
getevent()                      /* get next event */
{
        XNextEvent(ourdisplay, levptr(XEvent));
        switch (levptr(XEvent)->type) {
        case ConfigureNotify:
                resizewindow(levptr(XConfigureEvent));
                break;
        case UnmapNotify:
                freepixels();
                break;
        case MapNotify:
                if (getpixels() == 0)
                        stderr_v("Cannot allocate colors\n");
                else
                        new_ctab(ncolors);
                break;
        case Expose:
                fixwindow(levptr(XExposeEvent));
                break;
        case KeyPress:
                getkey(levptr(XKeyPressedEvent));
                break;
        case ButtonPress:
                break;
        }
}


static
getkey(ekey)                            /* get input key */
register XKeyPressedEvent  *ekey;
{
        c_last += XLookupString(ekey, c_queue+c_last, sizeof(c_queue)-c_last,
                                NULL, NULL);
        x11_driver.inpready = c_last-c_first;
}


static
fixwindow(eexp)                         /* repair damage to window */
register XExposeEvent  *eexp;
{
        if (eexp->window == gwind) {
                sprintf(getcombuf(&x11_driver), "repaint %d %d %d %d\n",
                        eexp->x, gheight - eexp->y - eexp->height,
                        eexp->x + eexp->width, gheight - eexp->y);
        } else if (eexp->window == comline->w) {
                if (eexp->count == 0)
                        xt_redraw(comline);
        }
}


static
resizewindow(ersz)                      /* resize window */
register XConfigureEvent  *ersz;
{
        if (ersz->width == gwidth && ersz->height-COMHEIGHT == gheight)
                return;

        gwidth = ersz->width;
        gheight = ersz->height-COMHEIGHT;
        x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
        x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;

        strcpy(getcombuf(&x11_driver), "new\n");
}
Revision:	1.5
Committed:	Thu Feb 22 11:46:26 1990 UTC (34 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.4:	+12 -17 lines
Log Message:	added explicit flush call to drivers
#	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	greg	1.4	* x11.c - driver for X-windows version 11.3
9	greg	1.1	*
10	greg	1.4	* Jan 1990
11	greg	1.1	*/
12
13			#include <stdio.h>
14
15			#include <sys/ioctl.h>
16
17			#include <X11/Xlib.h>
18	greg	1.4	#include <X11/cursorfont.h>
19			#include <X11/Xutil.h>
20	greg	1.1
21			#include "color.h"
22			#include "driver.h"
23			#include "x11twind.h"
24
25			#define GAMMA 2.2 /* exponent for color correction */
26
27	greg	1.4	#define MINWIDTH (4COMCW) / minimum graphics window width */
28			#define MINHEIGHT 16 /* minimum graphics window height */
29
30	greg	1.1	#define BORWIDTH 5 /* border width */
31			#define COMHEIGHT (COMLHCOMCH) / command line height (pixels) */
32
33			#define COMFN "8x13" /* command line font name */
34			#define COMLH 3 /* number of command lines */
35			#define COMCW 8 /* approx. character width (pixels) */
36			#define COMCH 14 /* approx. character height (pixels) */
37
38	greg	1.4	#define ourscreen DefaultScreen(ourdisplay)
39			#define ourroot RootWindow(ourdisplay,ourscreen)
40			#define ourwhite WhitePixel(ourdisplay,ourscreen)
41			#define ourblack BlackPixel(ourdisplay,ourscreen)
42
43			#define levptr(etype) ((etype *)&currentevent)
44	greg	1.1
45	greg	1.4	static XEvent currentevent; /* current event */
46	greg	1.1
47			static int ncolors = 0; /* color table size */
48			static int pixval = NULL; / allocated pixels */
49
50			static Display ourdisplay = NULL; / our display */
51
52			static Window gwind = 0; /* our graphics window */
53
54			static Cursor pickcursor = 0; /* cursor used for picking */
55
56	greg	1.4	static int gwidth, gheight; /* graphics window size */
57	greg	1.1
58			static TEXTWIND comline = NULL; / our command line */
59
60			static char c_queue[64]; /* input queue */
61			static int c_first = 0; /* first character in queue */
62			static int c_last = 0; /* last character in queue */
63
64			static GC ourgc = 0; /* our graphics context for drawing */
65
66			static Colormap ourmap; /* our color map */
67
68			extern char *malloc();
69
70			int x11_close(), x11_clear(), x11_paintr(), x11_errout(),
71	greg	1.5	x11_getcur(), x11_comout(), x11_comin(), x11_flush();
72	greg	1.1
73			static struct driver x11_driver = {
74			x11_close, x11_clear, x11_paintr, x11_getcur,
75	greg	1.5	x11_comout, x11_comin, x11_flush, 1.0
76	greg	1.1	};
77
78
79			struct driver *
80			x11_init(name, id) /* initialize driver */
81			char name, id;
82			{
83	greg	1.4	XWMHints ourxwmhints;
84	greg	1.1	Pixmap bmCursorSrc, bmCursorMsk;
85
86			ourdisplay = XOpenDisplay(NULL);
87			if (ourdisplay == NULL) {
88			stderr_v("cannot open X-windows; DISPLAY variable set?\n");
89			return(NULL);
90			}
91	greg	1.4	if (DisplayPlanes(ourdisplay, ourscreen) < 4) {
92	greg	1.1	stderr_v("not enough colors\n");
93			return(NULL);
94			}
95	greg	1.4	ourmap = DefaultColormap(ourdisplay,ourscreen);
96	greg	1.1	make_gmap(GAMMA); /* make color map */
97			/* create a cursor */
98			pickcursor = XCreateFontCursor (ourdisplay, XC_diamond_cross);
99	greg	1.4	/* open window */
100			gwind = XCreateSimpleWindow(ourdisplay, ourroot, 0, 0,
101			DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
102			DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
103			BORWIDTH, ourblack, ourwhite);
104			if (gwind == 0) {
105			stderr_v("cannot create window\n");
106			return(NULL);
107			}
108			XStoreName(ourdisplay, gwind, id);
109			ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
110			ourxwmhints.flags = InputHint;
111			ourxwmhints.input = True;
112			XSetWMHints(ourdisplay, gwind, &ourxwmhints);
113			XSelectInput(ourdisplay, gwind, ExposureMask);
114			XMapWindow(ourdisplay, gwind);
115			XWindowEvent(ourdisplay, gwind, ExposureMask, levptr(XExposeEvent));
116			gwidth = levptr(XExposeEvent)->width;
117			gheight = levptr(XExposeEvent)->height - COMHEIGHT;
118			x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
119			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
120	greg	1.1	x11_driver.inpready = 0;
121			cmdvec = x11_comout; /* set error vectors */
122			if (wrnvec != NULL)
123			wrnvec = x11_errout;
124			return(&x11_driver);
125			}
126
127
128			static
129			x11_close() /* close our display */
130			{
131			cmdvec = NULL; /* reset error vectors */
132			if (wrnvec != NULL)
133			wrnvec = stderr_v;
134			if (ourdisplay == NULL)
135			return;
136			if (comline != NULL) {
137			xt_close(comline);
138			comline = NULL;
139			}
140			if (gwind != 0) {
141			XFreeGC(ourdisplay, ourgc);
142			XDestroyWindow(ourdisplay, gwind);
143			gwind = 0;
144			ourgc = 0;
145			}
146			XFreeCursor(ourdisplay, pickcursor);
147			freepixels();
148			XCloseDisplay(ourdisplay);
149			ourdisplay = NULL;
150			}
151
152
153			static
154			x11_clear(xres, yres) /* clear our display */
155			int xres, yres;
156			{
157			if (xres != gwidth \|\| yres != gheight) { /* change window */
158			if (comline != NULL)
159			xt_close(comline);
160	greg	1.4	XSelectInput(ourdisplay, gwind, 0);
161			XResizeWindow(ourdisplay, gwind, xres, yres+COMHEIGHT);
162	greg	1.1	comline = xt_open(ourdisplay,
163	greg	1.4	DefaultGC(ourdisplay,ourscreen),
164	greg	1.1	gwind, 0, yres, xres, COMHEIGHT, 0, COMFN);
165	greg	1.4	if (comline == NULL) {
166			stderr_v("Cannot open command line window\n");
167			quit(1);
168			}
169			XSelectInput(ourdisplay, comline->w, ExposureMask);
170	greg	1.1	gwidth = xres;
171			gheight = yres;
172	greg	1.4	XSync(ourdisplay, 1); /* discard input */
173			sleep(2); /* wait for window manager */
174			}
175			XClearWindow(ourdisplay, gwind);
176	greg	1.1	/* reinitialize color table */
177	greg	1.4	if (getpixels() == 0)
178	greg	1.1	stderr_v("cannot allocate colors\n");
179			else
180			new_ctab(ncolors);
181	greg	1.4
182			XSelectInput(ourdisplay, gwind,
183			StructureNotifyMask\|ExposureMask\|KeyPressMask\|ButtonPressMask);
184	greg	1.1	}
185
186
187			static
188			x11_paintr(col, xmin, ymin, xmax, ymax) /* fill a rectangle */
189			COLOR col;
190			int xmin, ymin, xmax, ymax;
191			{
192			extern int xnewcolr(); /* pixel assignment routine */
193
194			if (ncolors > 0) {
195			XSetForeground(ourdisplay, ourgc,
196			pixval[get_pixel(col, xnewcolr)]);
197			XFillRectangle(ourdisplay, gwind,
198			ourgc, xmin, gheight-ymax, xmax-xmin, ymax-ymin);
199			}
200	greg	1.5	}
201
202
203			static
204			x11_flush() /* flush output */
205			{
206			if (ncolors <= 0) /* output necessary for death */
207			XFillRectangle(ourdisplay, gwind, ourgc, 0, 0, 1 ,1);
208			while (XPending(ourdisplay) > 0)
209			getevent();
210	greg	1.1	}
211
212
213			static
214	greg	1.3	x11_comin(inp, prompt) /* read in a command line */
215			char inp, prompt;
216	greg	1.1	{
217			int x11_getc(), x11_comout();
218
219	greg	1.3	if (prompt != NULL)
220	greg	1.4	if (fromcombuf(inp, &x11_driver))
221			return;
222			else
223			xt_puts(prompt, comline);
224	greg	1.1	xt_cursor(comline, TBLKCURS);
225			editline(inp, x11_getc, x11_comout);
226			xt_cursor(comline, TNOCURS);
227			}
228
229
230			static
231			x11_comout(out) /* output a string to command line */
232			char *out;
233			{
234			if (comline != NULL)
235			xt_puts(out, comline);
236			XFlush(ourdisplay);
237			}
238
239
240			static
241			x11_errout(msg) /* output an error message */
242			char *msg;
243			{
244			x11_comout(msg);
245			stderr_v(msg); /* send to stderr also! */
246			}
247
248
249			static int
250			x11_getcur(xp, yp) /* get cursor position */
251			int xp, yp;
252			{
253			while (XGrabPointer(ourdisplay, gwind, True, ButtonPressMask,
254			GrabModeAsync, GrabModeAsync, None, pickcursor,
255			CurrentTime) != GrabSuccess)
256			sleep(2);
257
258			do
259			getevent();
260			while (c_last <= c_first && levptr(XEvent)->type != ButtonPress);
261			*xp = levptr(XButtonPressedEvent)->x;
262			*yp = gheight-1 - levptr(XButtonPressedEvent)->y;
263			XUngrabPointer(ourdisplay, CurrentTime);
264			XFlush(ourdisplay); /* insure release */
265			if (c_last > c_first) /* key pressed */
266			return(x11_getc());
267			/* button pressed */
268			if (levptr(XButtonPressedEvent)->button & Button1)
269			return(MB1);
270			if (levptr(XButtonPressedEvent)->button & Button2)
271			return(MB2);
272			if (levptr(XButtonPressedEvent)->button & Button3)
273			return(MB3);
274			if (levptr(XButtonPressedEvent)->button & (Button4\|Button5))
275			return(MB1);
276			return(ABORT);
277			}
278
279
280			static
281			xnewcolr(ndx, r, g, b) /* enter a color into hardware table */
282			int ndx;
283			int r, g, b;
284			{
285			XColor xcolor;
286
287			xcolor.pixel = pixval[ndx];
288			xcolor.red = r << 8;
289			xcolor.green = g << 8;
290			xcolor.blue = b << 8;
291			xcolor.flags = DoRed\|DoGreen\|DoBlue;
292
293			XStoreColor(ourdisplay, ourmap, &xcolor);
294			}
295
296
297			static int
298			getpixels() /* get the color map */
299			{
300	greg	1.4	Visual *ourvis = DefaultVisual(ourdisplay,ourscreen);
301	greg	1.1
302	greg	1.4	if (ncolors > 0)
303			return(ncolors);
304	greg	1.1	for (ncolors=(ourvis->map_entries)-3; ncolors>12; ncolors=ncolors*.937){
305			pixval = (int )malloc(ncolorssizeof(int));
306			if (pixval == NULL)
307			break;
308			if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,
309			pixval,ncolors) != 0)
310			return(ncolors);
311			free((char *)pixval);
312			}
313			return(ncolors = 0);
314			}
315
316
317			static
318			freepixels() /* free our pixels */
319			{
320			if (ncolors == 0)
321			return;
322			XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
323			ncolors = 0;
324			}
325
326
327			static int
328			x11_getc() /* get a command character */
329			{
330			while (c_last <= c_first) {
331			c_first = c_last = 0; /* reset */
332			getevent(); /* wait for key */
333			}
334			x11_driver.inpready--;
335			return(c_queue[c_first++]);
336			}
337
338
339			static
340			getevent() /* get next event */
341			{
342			XNextEvent(ourdisplay, levptr(XEvent));
343			switch (levptr(XEvent)->type) {
344	greg	1.4	case ConfigureNotify:
345			resizewindow(levptr(XConfigureEvent));
346			break;
347			case UnmapNotify:
348			freepixels();
349			break;
350			case MapNotify:
351			if (getpixels() == 0)
352			stderr_v("Cannot allocate colors\n");
353			else
354			new_ctab(ncolors);
355			break;
356			case Expose:
357			fixwindow(levptr(XExposeEvent));
358			break;
359	greg	1.1	case KeyPress:
360			getkey(levptr(XKeyPressedEvent));
361			break;
362			case ButtonPress:
363			break;
364			}
365			}
366
367
368			static
369			getkey(ekey) /* get input key */
370			register XKeyPressedEvent *ekey;
371			{
372			c_last += XLookupString(ekey, c_queue+c_last, sizeof(c_queue)-c_last,
373			NULL, NULL);
374			x11_driver.inpready = c_last-c_first;
375			}
376
377
378			static
379			fixwindow(eexp) /* repair damage to window */
380			register XExposeEvent *eexp;
381			{
382	greg	1.4	if (eexp->window == gwind) {
383			sprintf(getcombuf(&x11_driver), "repaint %d %d %d %d\n",
384			eexp->x, gheight - eexp->y - eexp->height,
385	greg	1.1	eexp->x + eexp->width, gheight - eexp->y);
386	greg	1.4	} else if (eexp->window == comline->w) {
387			if (eexp->count == 0)
388			xt_redraw(comline);
389			}
390	greg	1.1	}
391	greg	1.4
392
393			static
394			resizewindow(ersz) /* resize window */
395			register XConfigureEvent *ersz;
396			{
397			if (ersz->width == gwidth && ersz->height-COMHEIGHT == gheight)
398			return;
399
400			gwidth = ersz->width;
401			gheight = ersz->height-COMHEIGHT;
402			x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
403			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
404
405			strcpy(getcombuf(&x11_driver), "new\n");
406			}