1 /*
2  * Window management.
3  */
4 
5 /* Copyright (c) 1994-1996 David Hogan, see README for licence details */
6 #include <stdio.h>
7 #include <stdlib.h>
8 #include <inttypes.h>
9 #include <X11/X.h>
10 #include <X11/Xos.h>
11 #include <X11/Xlib.h>
12 #include <X11/Xutil.h>
13 #include <X11/Xatom.h>
14 #include <X11/extensions/shape.h>
15 #include "dat.h"
16 #include "fns.h"
17 
18 int isNew;
19 
20 int
21 manage(Client *c, int mapped)
22 {
23 	int fixsize, dohide, doreshape, state;
24 	long msize;
25 	XClassHint class;
26 	XWMHints *hints;
27 	XSetWindowAttributes attrs;
28 
29 	trace("manage", c, 0);
30 	XSelectInput(dpy, c->window, ColormapChangeMask | EnterWindowMask | PropertyChangeMask | FocusChangeMask | KeyPressMask);
31 
32 	/* Get loads of hints */
33 
34 	if(XGetClassHint(dpy, c->window, &class) != 0){	/* ``Success'' */
35 		c->instance = class.res_name;
36 		c->class = class.res_class;
37 		c->is9term = 0;
38 		if(isNew){
39 			c->is9term = strstr(c->class, "term") || strstr(c->class, "Term");
40 			isNew = 0;
41 		}
42 	}
43 	else {
44 		c->instance = 0;
45 		c->class = 0;
46 		c->is9term = 0;
47 	}
48 	c->iconname = getprop(c->window, XA_WM_ICON_NAME);
49 	c->name = getprop(c->window, XA_WM_NAME);
50 	setlabel(c);
51 
52 	hints = XGetWMHints(dpy, c->window);
53 	if(XGetWMNormalHints(dpy, c->window, &c->size, &msize) == 0 || c->size.flags == 0)
54 		c->size.flags = PSize;		/* not specified - punt */
55 
56 	getcmaps(c);
57 	getproto(c);
58 	gettrans(c);
59 	if(c->is9term)
60 		c->hold = getiprop(c->window, _rio_hold_mode);
61 
62 	/* Figure out what to do with the window from hints */
63 
64 	if(!getstate(c->window, &state))
65 		state = hints ? hints->initial_state : NormalState;
66 	dohide = (state == IconicState);
67 
68 	fixsize = 0;
69 	if((c->size.flags & (USSize|PSize)))
70 		fixsize = 1;
71 	if((c->size.flags & (PMinSize|PMaxSize)) == (PMinSize|PMaxSize) && c->size.min_width == c->size.max_width && c->size.min_height == c->size.max_height)
72 		fixsize = 1;
73 	doreshape = !mapped;
74 	if(fixsize){
75 		if(c->size.flags & USPosition)
76 			doreshape = 0;
77 		if(dohide && (c->size.flags & PPosition))
78 			doreshape = 0;
79 		if(c->trans != None)
80 			doreshape = 0;
81 	}
82 	if(c->is9term)
83 		fixsize = 0;
84 	if(c->size.flags & PBaseSize){
85 		c->min_dx = c->size.base_width;
86 		c->min_dy = c->size.base_height;
87 	}
88 	else if(c->size.flags & PMinSize){
89 		c->min_dx = c->size.min_width;
90 		c->min_dy = c->size.min_height;
91 	}
92 	else if(c->is9term){
93 		c->min_dx = 100;
94 		c->min_dy = 50;
95 	}
96 	else
97 		c->min_dx = c->min_dy = 0;
98 
99 	if(hints)
100 		XFree(hints);
101 
102 	/* Now do it!!! */
103 
104 	if(doreshape){
105 		if(0) fprintf(stderr, "in doreshape is9term=%d fixsize=%d, x=%d, y=%d, min_dx=%d, min_dy=%d, dx=%d, dy=%d\n",
106 				c->is9term, fixsize, c->x, c->y, c->min_dx, c->min_dy, c->dx, c->dy);
107 		if(current && current->screen == c->screen)
108 			cmapnofocus(c->screen);
109 		if(!c->is9term && c->x==0 && c->y==0){
110 			static int nwin;
111 
112 			c->x = 20*nwin+BORDER;
113 			c->y = 20*nwin+BORDER;
114 			nwin++;
115 			nwin %= 10;
116 		}
117 
118 		if(c->is9term && !(fixsize ? drag(c, Button3) : sweep(c, Button3))){
119 			ScreenInfo *screen = c->screen;
120 			XKillClient(dpy, c->window);
121 			rmclient(c);
122 			if(current && current->screen == screen)
123 				cmapfocus(current);
124 			return 0;
125 		}
126 	}
127 
128 	attrs.border_pixel =  c->screen->black;
129 	attrs.background_pixel =  c->screen->white;
130 	attrs.colormap = c->screen->def_cmap;
131 	c->parent = XCreateWindow(dpy, c->screen->root,
132 			c->x - BORDER, c->y - BORDER,
133 			c->dx + 2*BORDER, c->dy + 2*BORDER,
134 			0,
135 			c->screen->depth,
136 			CopyFromParent,
137 			c->screen->vis,
138 			CWBackPixel | CWBorderPixel | CWColormap,
139 			&attrs);
140 
141 	XSelectInput(dpy, c->parent, SubstructureRedirectMask | SubstructureNotifyMask|ButtonPressMask| PointerMotionMask|LeaveWindowMask|KeyPressMask);
142 	if(mapped)
143 		c->reparenting = 1;
144 	if(doreshape && !fixsize)
145 		XResizeWindow(dpy, c->window, c->dx, c->dy);
146 	XSetWindowBorderWidth(dpy, c->window, 0);
147 
148 	/*
149 	  * To have something more than only a big white or black border
150 	  * XXX should replace this by a pattern in the white or black
151 	  * such that we can see the border also if all our
152 	  * windows are black and/or white
153 	  * (black (or white)  border around black (or white) window
154 	  *  is not very helpful.
155 	  */
156 	if(c->screen->depth <= 8){
157 		XSetWindowBorderWidth(dpy, c->parent, 1);
158 	}
159 
160 	XReparentWindow(dpy, c->window, c->parent, BORDER, BORDER);
161 #ifdef	SHAPE
162 	if(shape){
163 		XShapeSelectInput(dpy, c->window, ShapeNotifyMask);
164 		ignore_badwindow = 1;		/* magic */
165 		setshape(c);
166 		ignore_badwindow = 0;
167 	}
168 #endif
169 	XAddToSaveSet(dpy, c->window);
170 	if(dohide)
171 		hide(c);
172 	else {
173 		XMapWindow(dpy, c->window);
174 		XMapWindow(dpy, c->parent);
175 		XUnmapWindow(dpy, c->screen->sweepwin);
176 		if(nostalgia || doreshape)
177 			active(c);
178 		else if(c->trans != None && current && current->window == c->trans)
179 			active(c);
180 		else
181 			setactive(c, 0);
182 		setstate(c, NormalState);
183 	}
184 	if(current && (current != c))
185 		cmapfocus(current);
186 	c->init = 1;
187 
188 	/*
189 	 * If we swept the window, let's send a resize event to the
190 	 * guy who just got resized.  It's not clear whether the apps
191 	 * should notice their new size via other means.  Try as I might,
192 	 * I can't find a way to have them notice during initdraw, so
193 	 * I solve the problem this way instead.		-rsc
194 	 */
195 	if(c->is9term)
196 		sendconfig(c);
197 	return 1;
198 }
199 
200 void
201 scanwins(ScreenInfo *s)
202 {
203 	unsigned int i, nwins;
204 	Client *c;
205 	Window dw1, dw2, *wins;
206 	XWindowAttributes attr;
207 
208 	XQueryTree(dpy, s->root, &dw1, &dw2, &wins, &nwins);
209 	for(i = 0; i < nwins; i++){
210 		XGetWindowAttributes(dpy, wins[i], &attr);
211 		if(attr.override_redirect || wins[i] == s->menuwin)
212 			continue;
213 		c = getclient(wins[i], 1);
214 		if(c != 0 && c->window == wins[i] && !c->init){
215 			c->x = attr.x;
216 			c->y = attr.y;
217 			c->dx = attr.width;
218 			c->dy = attr.height;
219 			c->border = attr.border_width;
220 			c->screen = s;
221 			c->parent = s->root;
222 			if(attr.map_state == IsViewable)
223 				manage(c, 1);
224 		}
225 	}
226 	XFree((void *) wins);	/* cast is to shut stoopid compiler up */
227 }
228 
229 void
230 gettrans(Client *c)
231 {
232 	Window trans;
233 
234 	trans = None;
235 	if(XGetTransientForHint(dpy, c->window, &trans) != 0)
236 		c->trans = trans;
237 	else
238 		c->trans = None;
239 }
240 
241 void
242 withdraw(Client *c)
243 {
244 	XUnmapWindow(dpy, c->parent);
245 	XReparentWindow(dpy, c->window, c->screen->root, c->x, c->y);
246 	XRemoveFromSaveSet(dpy, c->window);
247 	setstate(c, WithdrawnState);
248 
249 	/* flush any errors */
250 	ignore_badwindow = 1;
251 	XSync(dpy, False);
252 	ignore_badwindow = 0;
253 }
254 
255 static void
256 installcmap(ScreenInfo *s, Colormap cmap)
257 {
258 	if(cmap == None)
259 		XInstallColormap(dpy, s->def_cmap);
260 	else
261 		XInstallColormap(dpy, cmap);
262 }
263 
264 void
265 cmapfocus(Client *c)
266 {
267 	int i, found;
268 	Client *cc;
269 
270 	if(c == 0)
271 		return;
272 	else if(c->ncmapwins != 0){
273 		found = 0;
274 		for(i = c->ncmapwins-1; i >= 0; i--){
275 			installcmap(c->screen, c->wmcmaps[i]);
276 			if(c->cmapwins[i] == c->window)
277 				found++;
278 		}
279 		if(!found)
280 			installcmap(c->screen, c->cmap);
281 	}
282 	else if(c->trans != None && (cc = getclient(c->trans, 0)) != 0 && cc->ncmapwins != 0)
283 		cmapfocus(cc);
284 	else
285 		installcmap(c->screen, c->cmap);
286 }
287 
288 void
289 cmapnofocus(ScreenInfo *s)
290 {
291 	installcmap(s, None);
292 }
293 
294 void
295 getcmaps(Client *c)
296 {
297 	int n, i;
298 	Window *cw;
299 	XWindowAttributes attr;
300 
301 	if(!c->init){
302 		ignore_badwindow = 1;
303 		XGetWindowAttributes(dpy, c->window, &attr);
304 		c->cmap = attr.colormap;
305 		XSync(dpy, False);
306 		ignore_badwindow = 0;
307 	}
308 
309 	n = _getprop(c->window, wm_colormaps, XA_WINDOW, 100L, (void*)&cw);
310 	if(c->ncmapwins != 0){
311 		XFree((char *)c->cmapwins);
312 		free((char *)c->wmcmaps);
313 	}
314 	if(n <= 0){
315 		c->ncmapwins = 0;
316 		return;
317 	}
318 
319 	c->ncmapwins = n;
320 	c->cmapwins = cw;
321 
322 	c->wmcmaps = (Colormap*)malloc(n*sizeof(Colormap));
323 	for(i = 0; i < n; i++){
324 		if(cw[i] == c->window)
325 			c->wmcmaps[i] = c->cmap;
326 		else {
327 			/* flush any errors (e.g., caused by mozilla tabs) */
328 			ignore_badwindow = 1;
329 			XSelectInput(dpy, cw[i], ColormapChangeMask);
330 			XGetWindowAttributes(dpy, cw[i], &attr);
331 			c->wmcmaps[i] = attr.colormap;
332 			XSync(dpy, False);
333 			ignore_badwindow = 0;
334 		}
335 	}
336 }
337 
338 void
339 setlabel(Client *c)
340 {
341 	char *label, *p;
342 
343 	if(c->iconname != 0)
344 		label = c->iconname;
345 	else if(c->name != 0)
346 		label = c->name;
347 	else if(c->instance != 0)
348 		label = c->instance;
349 	else if(c->class != 0)
350 		label = c->class;
351 	else
352 		label = "no label";
353 	if((p = index(label, ':')) != 0)
354 		*p = '\0';
355 	c->label = label;
356 }
357 
358 #ifdef	SHAPE
359 void
360 setshape(Client *c)
361 {
362 	int n, order;
363 	XRectangle *rect;
364 
365 	/* don't try to add a border if the window is non-rectangular */
366 	rect = XShapeGetRectangles(dpy, c->window, ShapeBounding, &n, &order);
367 	if(n > 1)
368 		XShapeCombineShape(dpy, c->parent, ShapeBounding, BORDER, BORDER,
369 			c->window, ShapeBounding, ShapeSet);
370 	XFree((void*)rect);
371 }
372 #endif
373 
374 int
375 _getprop(Window w, Atom a, Atom type, long len, unsigned char **p)
376 {
377 	Atom real_type;
378 	int format;
379 	unsigned long n, extra;
380 	int status;
381 
382 	status = XGetWindowProperty(dpy, w, a, 0L, len, False, type, &real_type, &format, &n, &extra, p);
383 	if(status != Success || *p == 0)
384 		return -1;
385 	if(n == 0)
386 		XFree((void*) *p);
387 	/* could check real_type, format, extra here... */
388 	return n;
389 }
390 
391 char *
392 getprop(Window w, Atom a)
393 {
394 	unsigned char *p;
395 
396 	if(_getprop(w, a, XA_STRING, 100L, &p) <= 0)
397 		return 0;
398 	return (char *)p;
399 }
400 
401 int
402 get1prop(Window w, Atom a, Atom type)
403 {
404 	char **p, *x;
405 
406 	if(_getprop(w, a, type, 1L, (void*)&p) <= 0)
407 		return 0;
408 	x = *p;
409 	XFree((void*) p);
410 	return (int)(uintptr_t)x;
411 }
412 
413 Window
414 getwprop(Window w, Atom a)
415 {
416 	return get1prop(w, a, XA_WINDOW);
417 }
418 
419 int
420 getiprop(Window w, Atom a)
421 {
422 	return get1prop(w, a, XA_INTEGER);
423 }
424 
425 void
426 setstate(Client *c, int state)
427 {
428 	long data[2];
429 
430 	data[0] = (long) state;
431 	data[1] = (long) None;
432 
433 	c->state = state;
434 	XChangeProperty(dpy, c->window, wm_state, wm_state, 32,
435 		PropModeReplace, (unsigned char *)data, 2);
436 }
437 
438 int
439 getstate(Window w, int *state)
440 {
441 	long *p = 0;
442 
443 	if(_getprop(w, wm_state, wm_state, 2L, (void*)&p) <= 0)
444 		return 0;
445 
446 	*state = (int) *p;
447 	XFree((char *) p);
448 	return 1;
449 }
450 
451 void
452 getproto(Client *c)
453 {
454 	Atom *p;
455 	int i;
456 	long n;
457 	Window w;
458 
459 	w = c->window;
460 	c->proto = 0;
461 	if((n = _getprop(w, wm_protocols, XA_ATOM, 20L, (void*)&p)) <= 0)
462 		return;
463 
464 	for(i = 0; i < n; i++)
465 		if(p[i] == wm_delete)
466 			c->proto |= Pdelete;
467 		else if(p[i] == wm_take_focus)
468 			c->proto |= Ptakefocus;
469 		else if(p[i] == wm_lose_focus)
470 			c->proto |= Plosefocus;
471 
472 	XFree((char *) p);
473 }