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Date:: Wed Jun 9 14:01:30 2004 UTC
Message:: Add buttons 4 and 5 (scrolling on X).
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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 		case 4:
224 			s |= Button4Mask;
225 			break;
226 		case 5:
227 			s |= Button5Mask;
228 			break;
229 		}
230 		break;
231 	case ButtonRelease:
232 		be = (XButtonEvent*)e;
233 		m->xy.x = be->x;
234 		m->xy.y = be->y;
235 		s = be->state;
236 		m->msec = be->time;
237 		switch(be->button){
238 		case 1:
239 			s &= ~Button1Mask;
240 			break;
241 		case 2:
242 			s &= ~Button2Mask;
243 			break;
244 		case 3:
245 			s &= ~Button3Mask;
246 			break;
247 		case 4:
248 			s &= ~Button4Mask;
249 			break;
250 		case 5:
251 			s &= ~Button5Mask;
252 			break;
253 		}
254 		break;
255 
256 	case MotionNotify:
257 		me = (XMotionEvent*)e;
258 		s = me->state;
259 		m->xy.x = me->x;
260 		m->xy.y = me->y;
261 		m->msec = me->time;
262 		break;
263 
264 	default:
265 		return -1;
266 	}
267 
268 	m->buttons = 0;
269 	if(s & Button1Mask)
270 		m->buttons |= 1;
271 	if(s & Button2Mask)
272 		m->buttons |= 2;
273 	if(s & Button3Mask)
274 		m->buttons |= 4;
275 	if(s & Button4Mask)
276 		m->buttons |= 8;
277 	if(s & Button5Mask)
278 		m->buttons |= 16;
279 	return 0;
280 }
281 
282 void
283 _xmoveto(Point p)
284 {
285 	XWarpPointer(_x.display, None, _x.drawable, 0, 0, 0, 0, p.x, p.y);
286 	XFlush(_x.display);
287 }
288 
289 static int
290 revbyte(int b)
291 {
292 	int r;
293 
294 	r = 0;
295 	r |= (b&0x01) << 7;
296 	r |= (b&0x02) << 5;
297 	r |= (b&0x04) << 3;
298 	r |= (b&0x08) << 1;
299 	r |= (b&0x10) >> 1;
300 	r |= (b&0x20) >> 3;
301 	r |= (b&0x40) >> 5;
302 	r |= (b&0x80) >> 7;
303 	return r;
304 }
305 
306 static void
307 xcursorarrow(void)
308 {
309 	if(_x.cursor != 0){
310 		XFreeCursor(_x.display, _x.cursor);
311 		_x.cursor = 0;
312 	}
313 	XUndefineCursor(_x.display, _x.drawable);
314 	XFlush(_x.display);
315 }
316 
317 
318 void
319 _xsetcursor(Cursor *c)
320 {
321 	XColor fg, bg;
322 	XCursor xc;
323 	Pixmap xsrc, xmask;
324 	int i;
325 	uchar src[2*16], mask[2*16];
326 
327 	if(c == nil){
328 		xcursorarrow();
329 		return;
330 	}
331 	for(i=0; i<2*16; i++){
332 		src[i] = revbyte(c->set[i]);
333 		mask[i] = revbyte(c->set[i] | c->clr[i]);
334 	}
335 
336 	fg = _x.map[0];
337 	bg = _x.map[255];
338 	xsrc = XCreateBitmapFromData(_x.display, _x.drawable, (char*)src, 16, 16);
339 	xmask = XCreateBitmapFromData(_x.display, _x.drawable, (char*)mask, 16, 16);
340 	xc = XCreatePixmapCursor(_x.display, xsrc, xmask, &fg, &bg, -c->offset.x, -c->offset.y);
341 	if(xc != 0) {
342 		XDefineCursor(_x.display, _x.drawable, xc);
343 		if(_x.cursor != 0)
344 			XFreeCursor(_x.display, _x.cursor);
345 		_x.cursor = xc;
346 	}
347 	XFreePixmap(_x.display, xsrc);
348 	XFreePixmap(_x.display, xmask);
349 	XFlush(_x.display);
350 }
351 
352 struct {
353 	char buf[SnarfSize];
354 	QLock lk;
355 } clip;
356 
357 char*
358 _xgetsnarf(XDisplay *xd)
359 {
360 	uchar *data, *xdata;
361 	Atom clipboard, type, prop;
362 	ulong len, lastlen, dummy;
363 	int fmt, i;
364 	XWindow w;
365 
366 	qlock(&clip.lk);
367 	/*
368 	 * Is there a primary selection (highlighted text in an xterm)?
369 	 */
370 	clipboard = XA_PRIMARY;
371 	w = XGetSelectionOwner(xd, XA_PRIMARY);
372 	if(w == _x.drawable){
373 	mine:
374 		data = (uchar*)strdup(clip.buf);
375 		goto out;
376 	}
377 
378 	/*
379 	 * If not, is there a clipboard selection?
380 	 */
381 	if(w == None && _x.clipboard != None){
382 		clipboard = _x.clipboard;
383 		w = XGetSelectionOwner(xd, _x.clipboard);
384 		if(w == _x.drawable)
385 			goto mine;
386 	}
387 
388 	/*
389 	 * If not, give up.
390 	 */
391 	if(w == None){
392 		data = nil;
393 		goto out;
394 	}
395 		
396 	/*
397 	 * We should be waiting for SelectionNotify here, but it might never
398 	 * come, and we have no way to time out.  Instead, we will clear
399 	 * local property #1, request our buddy to fill it in for us, and poll
400 	 * until he's done or we get tired of waiting.
401 	 *
402 	 * We should try to go for _x.utf8string instead of XA_STRING,
403 	 * but that would add to the polling.
404 	 */
405 	prop = 1;
406 	XChangeProperty(xd, _x.drawable, prop, XA_STRING, 8, PropModeReplace, (uchar*)"", 0);
407 	XConvertSelection(xd, clipboard, XA_STRING, prop, _x.drawable, CurrentTime);
408 	XFlush(xd);
409 	lastlen = 0;
410 	for(i=0; i<10 || (lastlen!=0 && i<30); i++){
411 		usleep(100*1000);
412 		XGetWindowProperty(xd, _x.drawable, prop, 0, 0, 0, AnyPropertyType,
413 			&type, &fmt, &dummy, &len, &data);
414 		if(lastlen == len && len > 0)
415 			break;
416 		lastlen = len;
417 	}
418 	if(i == 10){
419 		data = nil;
420 		goto out;
421 	}
422 	/* get the property */
423 	data = nil;
424 	XGetWindowProperty(xd, _x.drawable, prop, 0, SnarfSize/sizeof(ulong), 0, 
425 		AnyPropertyType, &type, &fmt, &len, &dummy, &xdata);
426 	if((type != XA_STRING && type != _x.utf8string) || len == 0){
427 		if(xdata)
428 			XFree(xdata);
429 		data = nil;
430 	}else{
431 		if(xdata){
432 			data = (uchar*)strdup((char*)xdata);
433 			XFree(xdata);
434 		}else
435 			data = nil;
436 	}
437 out:
438 	qunlock(&clip.lk);
439 	return (char*)data;
440 }
441 
442 void
443 _xputsnarf(XDisplay *xd, char *data)
444 {
445 	XButtonEvent e;
446 
447 	if(strlen(data) >= SnarfSize)
448 		return;
449 	qlock(&clip.lk);
450 	strcpy(clip.buf, data);
451 
452 	/* leave note for mouse proc to assert selection ownership */
453 	_x.putsnarf++;
454 
455 	/* send mouse a fake event so snarf is announced */
456 	memset(&e, 0, sizeof e);
457 	e.type = ButtonPress;
458 	e.window = _x.drawable;
459 	e.state = ~0;
460 	e.button = ~0;
461 	XSendEvent(xd, _x.drawable, True, ButtonPressMask, (XEvent*)&e);
462 	XFlush(xd);
463 
464 	qunlock(&clip.lk);
465 }
466 
467 int
468 _xselect(XEvent *e, XDisplay *xd)
469 {
470 	char *name;
471 	XEvent r;
472 	XSelectionRequestEvent *xe;
473 	Atom a[4];
474 
475 	memset(&r, 0, sizeof r);
476 	xe = (XSelectionRequestEvent*)e;
477 if(0) fprint(2, "xselect target=%d requestor=%d property=%d selection=%d\n",
478 	xe->target, xe->requestor, xe->property, xe->selection);
479 	r.xselection.property = xe->property;
480 	if(xe->target == _x.targets){
481 		a[0] = XA_STRING;
482 		a[1] = _x.utf8string;
483 		a[2] = _x.text;
484 		a[3] = _x.compoundtext;
485 
486 		XChangeProperty(xd, xe->requestor, xe->property, xe->target,
487 			8, PropModeReplace, (uchar*)a, sizeof a);
488 	}else if(xe->target == XA_STRING || xe->target == _x.utf8string || xe->target == _x.text || xe->target == _x.compoundtext){
489 		/* if the target is STRING we're supposed to reply with Latin1 XXX */
490 		qlock(&clip.lk);
491 		XChangeProperty(xd, xe->requestor, xe->property, xe->target,
492 			8, PropModeReplace, (uchar*)clip.buf, strlen(clip.buf));
493 		qunlock(&clip.lk);
494 	}else{
495 		name = XGetAtomName(xd, xe->target);
496 		if(strcmp(name, "TIMESTAMP") != 0)
497 			fprint(2, "%s: cannot handle selection request for '%s' (%d)\n", argv0, name, (int)xe->target);
498 		r.xselection.property = None;
499 	}
500 
501 	r.xselection.display = xe->display;
502 	/* r.xselection.property filled above */
503 	r.xselection.target = xe->target;
504 	r.xselection.type = SelectionNotify;
505 	r.xselection.requestor = xe->requestor;
506 	r.xselection.time = xe->time;
507 	r.xselection.send_event = True;
508 	r.xselection.selection = xe->selection;
509 	XSendEvent(xd, xe->requestor, False, 0, &r);
510 	XFlush(xd);
511 	return 0;
512 }
513 
514 void
515 putsnarf(char *data)
516 {
517 	_xputsnarf(_x.snarfcon, data);
518 }
519 
520 char*
521 getsnarf(void)
522 {
523 	return _xgetsnarf(_x.snarfcon);
524 }
525