1 /* input event and data structure translation */
2 
3 #include <u.h>
4 #include "x11-inc.h"
5 #include <libc.h>
6 #include <draw.h>
7 #include <memdraw.h>
8 #include <mouse.h>
9 #include <cursor.h>
10 #include <keyboard.h>
11 #include "x11-memdraw.h"
12 #include "x11-keysym2ucs.h"
13 
14 #undef time
15 
16 
17 static KeySym
18 __xtoplan9kbd(XEvent *e)
19 {
20 	KeySym k;
21 
22 	if(e->xany.type != KeyPress)
23 		return -1;
24 	needstack(20*1024);	/* X has some *huge* buffers in openobject */
25 	XLookupString((XKeyEvent*)e,NULL,0,&k,NULL);
26 	if(k == XK_Multi_key || k == NoSymbol)
27 		return -1;
28 
29 	if(k&0xFF00){
30 		switch(k){
31 		case XK_BackSpace:
32 		case XK_Tab:
33 		case XK_Escape:
34 		case XK_Delete:
35 		case XK_KP_0:
36 		case XK_KP_1:
37 		case XK_KP_2:
38 		case XK_KP_3:
39 		case XK_KP_4:
40 		case XK_KP_5:
41 		case XK_KP_6:
42 		case XK_KP_7:
43 		case XK_KP_8:
44 		case XK_KP_9:
45 		case XK_KP_Divide:
46 		case XK_KP_Multiply:
47 		case XK_KP_Subtract:
48 		case XK_KP_Add:
49 		case XK_KP_Decimal:
50 			k &= 0x7F;
51 			break;
52 		case XK_Linefeed:
53 			k = '\r';
54 			break;
55 		case XK_KP_Space:
56 			k = ' ';
57 			break;
58 		case XK_Home:
59 		case XK_KP_Home:
60 			k = Khome;
61 			break;
62 		case XK_Left:
63 		case XK_KP_Left:
64 			k = Kleft;
65 			break;
66 		case XK_Up:
67 		case XK_KP_Up:
68 			k = Kup;
69 			break;
70 		case XK_Down:
71 		case XK_KP_Down:
72 			k = Kdown;
73 			break;
74 		case XK_Right:
75 		case XK_KP_Right:
76 			k = Kright;
77 			break;
78 		case XK_Page_Down:
79 		case XK_KP_Page_Down:
80 			k = Kpgdown;
81 			break;
82 		case XK_End:
83 		case XK_KP_End:
84 			k = Kend;
85 			break;
86 		case XK_Page_Up:	
87 		case XK_KP_Page_Up:
88 			k = Kpgup;
89 			break;
90 		case XK_Insert:
91 		case XK_KP_Insert:
92 			k = Kins;
93 			break;
94 		case XK_KP_Enter:
95 		case XK_Return:
96 			k = '\n';
97 			break;
98 		case XK_Alt_L:
99 		case XK_Meta_L:	/* Shift Alt on PCs */
100 		case XK_Alt_R:
101 		case XK_Meta_R:	/* Shift Alt on PCs */
102 			k = Kalt;
103 			break;
104 		default:		/* not ISO-1 or tty control */
105 			if(k>0xff) {
106 				k = keysym2ucs(k);
107 				if(k==-1) return -1;
108 			}
109 		}
110 	}
111 
112 	/* Compensate for servers that call a minus a hyphen */
113 	if(k == XK_hyphen)
114 		k = XK_minus;
115 	/* Do control mapping ourselves if translator doesn't */
116 	if(e->xkey.state&ControlMask)
117 		k &= 0x9f;
118 	if(k == NoSymbol) {
119 		return -1;
120 	}
121 
122 	return k+0;
123 }
124 
125 static Rune*
126 xtoplan9latin1(XEvent *e)
127 {
128 	static Rune k[10];
129 	static int alting, nk;
130 	int n;
131 	int r;
132 
133 	r = __xtoplan9kbd(e);
134 	if(r < 0)
135 		return nil;
136 	if(alting){
137 		k[nk++] = r;
138 		n = _latin1(k, nk);
139 		if(n > 0){
140 			alting = 0;
141 			k[0] = n;
142 			k[1] = 0;
143 			return k;
144 		}
145 		if(n == -1){
146 			alting = 0;
147 			k[nk] = 0;
148 			return k;
149 		}
150 		/* n < -1, need more input */
151 		return nil;
152 	}else if(r == Kalt){
153 		alting = 1;
154 		nk = 0;
155 		return nil;
156 	}else{
157 		k[0] = r;
158 		k[1] = 0;
159 		return k;
160 	}
161 }
162 
163 int
164 _xtoplan9kbd(XEvent *e)
165 {
166 	static Rune *r;
167 
168 	if(e == (XEvent*)-1){
169 		assert(r);
170 		r--;
171 		return 0;
172 	}
173 	if(e)
174 		r = xtoplan9latin1(e);
175 	if(r && *r)
176 		return *r++;
177 	return -1;
178 }
179 
180 int
181 _xtoplan9mouse(XDisplay *xd, XEvent *e, Mouse *m)
182 {
183 	int s;
184 	XButtonEvent *be;
185 	XMotionEvent *me;
186 
187 	if(_x.putsnarf != _x.assertsnarf){
188 		_x.assertsnarf = _x.putsnarf;
189 		XSetSelectionOwner(_x.mousecon, XA_PRIMARY, _x.drawable, CurrentTime);
190 		if(_x.clipboard != None)
191 			XSetSelectionOwner(_x.mousecon, _x.clipboard, _x.drawable, CurrentTime);
192 		XFlush(xd);
193 	}
194 
195 	switch(e->type){
196 	case ButtonPress:
197 		be = (XButtonEvent*)e;
198 		/* 
199 		 * Fake message, just sent to make us announce snarf.
200 		 * Apparently state and button are 16 and 8 bits on
201 		 * the wire, since they are truncated by the time they
202 		 * get to us.
203 		 */
204 		if(be->send_event
205 		&& (~be->state&0xFFFF)==0
206 		&& (~be->button&0xFF)==0)
207 			return -1;
208 		/* BUG? on mac need to inherit these from elsewhere? */
209 		m->xy.x = be->x;
210 		m->xy.y = be->y;
211 		s = be->state;
212 		m->msec = be->time;
213 		switch(be->button){
214 		case 1:
215 			s |= Button1Mask;
216 			break;
217 		case 2:
218 			s |= Button2Mask;
219 			break;
220 		case 3:
221 			s |= Button3Mask;
222 			break;
223 		}
224 		break;
225 	case ButtonRelease:
226 		be = (XButtonEvent*)e;
227 		m->xy.x = be->x;
228 		m->xy.y = be->y;
229 		s = be->state;
230 		m->msec = be->time;
231 		switch(be->button){
232 		case 1:
233 			s &= ~Button1Mask;
234 			break;
235 		case 2:
236 			s &= ~Button2Mask;
237 			break;
238 		case 3:
239 			s &= ~Button3Mask;
240 			break;
241 		}
242 		break;
243 
244 	case MotionNotify:
245 		me = (XMotionEvent*)e;
246 		s = me->state;
247 		m->xy.x = me->x;
248 		m->xy.y = me->y;
249 		m->msec = me->time;
250 		break;
251 
252 	default:
253 		return -1;
254 	}
255 
256 	m->buttons = 0;
257 	if(s & Button1Mask)
258 		m->buttons |= 1;
259 	if(s & Button2Mask)
260 		m->buttons |= 2;
261 	if(s & Button3Mask)
262 		m->buttons |= 4;
263 
264 	return 0;
265 }
266 
267 void
268 _xmoveto(Point p)
269 {
270 	XWarpPointer(_x.display, None, _x.drawable, 0, 0, 0, 0, p.x, p.y);
271 	XFlush(_x.display);
272 }
273 
274 static int
275 revbyte(int b)
276 {
277 	int r;
278 
279 	r = 0;
280 	r |= (b&0x01) << 7;
281 	r |= (b&0x02) << 5;
282 	r |= (b&0x04) << 3;
283 	r |= (b&0x08) << 1;
284 	r |= (b&0x10) >> 1;
285 	r |= (b&0x20) >> 3;
286 	r |= (b&0x40) >> 5;
287 	r |= (b&0x80) >> 7;
288 	return r;
289 }
290 
291 static void
292 xcursorarrow(void)
293 {
294 	if(_x.cursor != 0){
295 		XFreeCursor(_x.display, _x.cursor);
296 		_x.cursor = 0;
297 	}
298 	XUndefineCursor(_x.display, _x.drawable);
299 	XFlush(_x.display);
300 }
301 
302 
303 void
304 _xsetcursor(Cursor *c)
305 {
306 	XColor fg, bg;
307 	XCursor xc;
308 	Pixmap xsrc, xmask;
309 	int i;
310 	uchar src[2*16], mask[2*16];
311 
312 	if(c == nil){
313 		xcursorarrow();
314 		return;
315 	}
316 	for(i=0; i<2*16; i++){
317 		src[i] = revbyte(c->set[i]);
318 		mask[i] = revbyte(c->set[i] | c->clr[i]);
319 	}
320 
321 	fg = _x.map[0];
322 	bg = _x.map[255];
323 	xsrc = XCreateBitmapFromData(_x.display, _x.drawable, (char*)src, 16, 16);
324 	xmask = XCreateBitmapFromData(_x.display, _x.drawable, (char*)mask, 16, 16);
325 	xc = XCreatePixmapCursor(_x.display, xsrc, xmask, &fg, &bg, -c->offset.x, -c->offset.y);
326 	if(xc != 0) {
327 		XDefineCursor(_x.display, _x.drawable, xc);
328 		if(_x.cursor != 0)
329 			XFreeCursor(_x.display, _x.cursor);
330 		_x.cursor = xc;
331 	}
332 	XFreePixmap(_x.display, xsrc);
333 	XFreePixmap(_x.display, xmask);
334 	XFlush(_x.display);
335 }
336 
337 struct {
338 	char buf[SnarfSize];
339 	QLock lk;
340 } clip;
341 
342 char*
343 _xgetsnarf(XDisplay *xd)
344 {
345 	uchar *data, *xdata;
346 	Atom clipboard, type, prop;
347 	ulong len, lastlen, dummy;
348 	int fmt, i;
349 	XWindow w;
350 
351 	qlock(&clip.lk);
352 	/*
353 	 * Is there a primary selection (highlighted text in an xterm)?
354 	 */
355 	clipboard = XA_PRIMARY;
356 	w = XGetSelectionOwner(xd, XA_PRIMARY);
357 	if(w == _x.drawable){
358 	mine:
359 		data = (uchar*)strdup(clip.buf);
360 		goto out;
361 	}
362 
363 	/*
364 	 * If not, is there a clipboard selection?
365 	 */
366 	if(w == None && _x.clipboard != None){
367 		clipboard = _x.clipboard;
368 		w = XGetSelectionOwner(xd, _x.clipboard);
369 		if(w == _x.drawable)
370 			goto mine;
371 	}
372 
373 	/*
374 	 * If not, give up.
375 	 */
376 	if(w == None){
377 		data = nil;
378 		goto out;
379 	}
380 		
381 	/*
382 	 * We should be waiting for SelectionNotify here, but it might never
383 	 * come, and we have no way to time out.  Instead, we will clear
384 	 * local property #1, request our buddy to fill it in for us, and poll
385 	 * until he's done or we get tired of waiting.
386 	 *
387 	 * We should try to go for _x.utf8string instead of XA_STRING,
388 	 * but that would add to the polling.
389 	 */
390 	prop = 1;
391 	XChangeProperty(xd, _x.drawable, prop, XA_STRING, 8, PropModeReplace, (uchar*)"", 0);
392 	XConvertSelection(xd, clipboard, XA_STRING, prop, _x.drawable, CurrentTime);
393 	XFlush(xd);
394 	lastlen = 0;
395 	for(i=0; i<10 || (lastlen!=0 && i<30); i++){
396 		usleep(100*1000);
397 		XGetWindowProperty(xd, _x.drawable, prop, 0, 0, 0, AnyPropertyType,
398 			&type, &fmt, &dummy, &len, &data);
399 		if(lastlen == len && len > 0)
400 			break;
401 		lastlen = len;
402 	}
403 	if(i == 10){
404 		data = nil;
405 		goto out;
406 	}
407 	/* get the property */
408 	data = nil;
409 	XGetWindowProperty(xd, _x.drawable, prop, 0, SnarfSize/sizeof(ulong), 0, 
410 		AnyPropertyType, &type, &fmt, &len, &dummy, &xdata);
411 	if((type != XA_STRING && type != _x.utf8string) || len == 0){
412 		if(xdata)
413 			XFree(xdata);
414 		data = nil;
415 	}else{
416 		if(xdata){
417 			data = (uchar*)strdup((char*)xdata);
418 			XFree(xdata);
419 		}else
420 			data = nil;
421 	}
422 out:
423 	qunlock(&clip.lk);
424 	return (char*)data;
425 }
426 
427 void
428 _xputsnarf(XDisplay *xd, char *data)
429 {
430 	XButtonEvent e;
431 
432 	if(strlen(data) >= SnarfSize)
433 		return;
434 	qlock(&clip.lk);
435 	strcpy(clip.buf, data);
436 
437 	/* leave note for mouse proc to assert selection ownership */
438 	_x.putsnarf++;
439 
440 	/* send mouse a fake event so snarf is announced */
441 	memset(&e, 0, sizeof e);
442 	e.type = ButtonPress;
443 	e.window = _x.drawable;
444 	e.state = ~0;
445 	e.button = ~0;
446 	XSendEvent(xd, _x.drawable, True, ButtonPressMask, (XEvent*)&e);
447 	XFlush(xd);
448 
449 	qunlock(&clip.lk);
450 }
451 
452 int
453 _xselect(XEvent *e, XDisplay *xd)
454 {
455 	char *name;
456 	XEvent r;
457 	XSelectionRequestEvent *xe;
458 	Atom a[4];
459 
460 	memset(&r, 0, sizeof r);
461 	xe = (XSelectionRequestEvent*)e;
462 if(0) fprint(2, "xselect target=%d requestor=%d property=%d selection=%d\n",
463 	xe->target, xe->requestor, xe->property, xe->selection);
464 	r.xselection.property = xe->property;
465 	if(xe->target == _x.targets){
466 		a[0] = XA_STRING;
467 		a[1] = _x.utf8string;
468 		a[2] = _x.text;
469 		a[3] = _x.compoundtext;
470 
471 		XChangeProperty(xd, xe->requestor, xe->property, xe->target,
472 			8, PropModeReplace, (uchar*)a, sizeof a);
473 	}else if(xe->target == XA_STRING || xe->target == _x.utf8string || xe->target == _x.text || xe->target == _x.compoundtext){
474 		/* if the target is STRING we're supposed to reply with Latin1 XXX */
475 		qlock(&clip.lk);
476 		XChangeProperty(xd, xe->requestor, xe->property, xe->target,
477 			8, PropModeReplace, (uchar*)clip.buf, strlen(clip.buf));
478 		qunlock(&clip.lk);
479 	}else{
480 		name = XGetAtomName(xd, xe->target);
481 		if(strcmp(name, "TIMESTAMP") != 0)
482 			fprint(2, "%s: cannot handle selection request for '%s' (%d)\n", argv0, name, (int)xe->target);
483 		r.xselection.property = None;
484 	}
485 
486 	r.xselection.display = xe->display;
487 	/* r.xselection.property filled above */
488 	r.xselection.target = xe->target;
489 	r.xselection.type = SelectionNotify;
490 	r.xselection.requestor = xe->requestor;
491 	r.xselection.time = xe->time;
492 	r.xselection.send_event = True;
493 	r.xselection.selection = xe->selection;
494 	XSendEvent(xd, xe->requestor, False, 0, &r);
495 	XFlush(xd);
496 	return 0;
497 }
498 
499 void
500 putsnarf(char *data)
501 {
502 	_xputsnarf(_x.snarfcon, data);
503 }
504 
505 char*
506 getsnarf(void)
507 {
508 	return _xgetsnarf(_x.snarfcon);
509 }
510