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made introduction comment in dwm.h shorter
[dwm.git] / event.c
1 /*
2  * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
3  * See LICENSE file for license details.
4  */
5 #include "dwm.h"
6 #include <stdlib.h>
7 #include <X11/keysym.h>
8 #include <X11/Xatom.h>
9
10 /* static */
11
12 typedef struct {
13         unsigned long mod;
14         KeySym keysym;
15         void (*func)(Arg *arg);
16         Arg arg;
17 } Key;
18
19 KEYS
20
21 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
22
23 static void
24 movemouse(Client *c)
25 {
26         int x1, y1, ocx, ocy, di;
27         unsigned int dui;
28         Window dummy;
29         XEvent ev;
30
31         ocx = c->x;
32         ocy = c->y;
33         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
34                         None, cursor[CurMove], CurrentTime) != GrabSuccess)
35                 return;
36         XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
37         for(;;) {
38                 XMaskEvent(dpy, MOUSEMASK | ExposureMask, &ev);
39                 switch (ev.type) {
40                 default: break;
41                 case Expose:
42                         handler[Expose](&ev);
43                         break;
44                 case MotionNotify:
45                         XSync(dpy, False);
46                         c->x = ocx + (ev.xmotion.x - x1);
47                         c->y = ocy + (ev.xmotion.y - y1);
48                         resize(c, False, TopLeft);
49                         break;
50                 case ButtonRelease:
51                         XUngrabPointer(dpy, CurrentTime);
52                         return;
53                 }
54         }
55 }
56
57 static void
58 resizemouse(Client *c)
59 {
60         int ocx, ocy;
61         int nw, nh;
62         Corner sticky;
63         XEvent ev;
64
65         ocx = c->x;
66         ocy = c->y;
67         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
68                                 None, cursor[CurResize], CurrentTime) != GrabSuccess)
69                 return;
70         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w, c->h);
71         for(;;) {
72                 XMaskEvent(dpy, MOUSEMASK | ExposureMask, &ev);
73                 switch(ev.type) {
74                 default: break;
75                 case Expose:
76                         handler[Expose](&ev);
77                         break;
78                 case MotionNotify:
79                         XSync(dpy, False);
80                         if((nw = abs(ocx - ev.xmotion.x)))
81                                 c->w = abs(ocx - ev.xmotion.x);
82                         if((nh = abs(ocy - ev.xmotion.y)))
83                                 c->h = abs(ocy - ev.xmotion.y);
84                         c->x = (ocx <= ev.xmotion.x) ? ocx : ocx - c->w;
85                         c->y = (ocy <= ev.xmotion.y) ? ocy : ocy - c->h;
86                         if(ocx <= ev.xmotion.x)
87                                 sticky = (ocy <= ev.xmotion.y) ? TopLeft : BotLeft;
88                         else
89                                 sticky = (ocy <= ev.xmotion.y) ? TopRight : BotRight;
90                         resize(c, True, sticky);
91                         break;
92                 case ButtonRelease:
93                         XUngrabPointer(dpy, CurrentTime);
94                         return;
95                 }
96         }
97 }
98
99 static void
100 buttonpress(XEvent *e)
101 {
102         int x;
103         Arg a;
104         Client *c;
105         XButtonPressedEvent *ev = &e->xbutton;
106
107         if(barwin == ev->window) {
108                 x = 0;
109                 for(a.i = 0; a.i < ntags; a.i++) {
110                         x += textw(tags[a.i]);
111                         if(ev->x < x) {
112                                 if(ev->button == Button1) {
113                                         if(ev->state & MODKEY)
114                                                 tag(&a);
115                                         else
116                                                 view(&a);
117                                 }
118                                 else if(ev->button == Button3) {
119                                         if(ev->state & MODKEY)
120                                                 toggletag(&a);
121                                         else
122                                                 toggleview(&a);
123                                 }
124                                 return;
125                         }
126                 }
127                 if(ev->x < x + bmw) {
128                         if(ev->button == Button1)
129                                 togglemode(NULL);
130                 }
131         }
132         else if((c = getclient(ev->window))) {
133                 focus(c);
134                 if(maximized || CLEANMASK(ev->state) != MODKEY)
135                         return;
136                 if(ev->button == Button1 && (arrange == dofloat || c->isfloat)) {
137                         restack(c);
138                         movemouse(c);
139                 }
140                 else if(ev->button == Button2)
141                         zoom(NULL);
142                 else if(ev->button == Button3 && (arrange == dofloat || c->isfloat)) {
143                         restack(c);
144                         resizemouse(c);
145                 }
146         }
147 }
148
149 static void
150 synconfig(Client *c, int x, int y, int w, int h, unsigned int border)
151 {
152         XEvent synev;
153
154         synev.type = ConfigureNotify;
155         synev.xconfigure.display = dpy;
156         synev.xconfigure.event = c->win;
157         synev.xconfigure.window = c->win;
158         synev.xconfigure.x = x;
159         synev.xconfigure.y = y;
160         synev.xconfigure.width = w;
161         synev.xconfigure.height = h;
162         synev.xconfigure.border_width = border;
163         synev.xconfigure.above = None;
164         XSendEvent(dpy, c->win, True, NoEventMask, &synev);
165 }
166
167 static void
168 configurerequest(XEvent *e)
169 {
170         unsigned long newmask;
171         Client *c;
172         XConfigureRequestEvent *ev = &e->xconfigurerequest;
173         XWindowChanges wc;
174
175         if((c = getclient(ev->window))) {
176                 if((c == sel) && !c->isfloat && (arrange != dofloat) && maximized) {
177                         synconfig(c, sx, sy + bh, sw - 2, sh - 2 - bh, ev->border_width);
178                         XSync(dpy, False);
179                         return;
180                 }
181                 gravitate(c, True);
182                 if(ev->value_mask & CWX)
183                         c->x = ev->x;
184                 if(ev->value_mask & CWY)
185                         c->y = ev->y;
186                 if(ev->value_mask & CWWidth)
187                         c->w = ev->width;
188                 if(ev->value_mask & CWHeight)
189                         c->h = ev->height;
190                 if(ev->value_mask & CWBorderWidth)
191                         c->border = ev->border_width;
192                 gravitate(c, False);
193                 wc.x = c->x;
194                 wc.y = c->y;
195                 wc.width = c->w;
196                 wc.height = c->h;
197                 newmask = ev->value_mask & (~(CWSibling | CWStackMode | CWBorderWidth));
198                 if(newmask)
199                         XConfigureWindow(dpy, c->win, newmask, &wc);
200                 else
201                         synconfig(c, c->x, c->y, c->w, c->h, c->border);
202                 XSync(dpy, False);
203                 if(c->isfloat)
204                         resize(c, False, TopLeft);
205                 else
206                         arrange(NULL);
207         }
208         else {
209                 wc.x = ev->x;
210                 wc.y = ev->y;
211                 wc.width = ev->width;
212                 wc.height = ev->height;
213                 wc.border_width = ev->border_width;
214                 wc.sibling = ev->above;
215                 wc.stack_mode = ev->detail;
216                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
217                 XSync(dpy, False);
218         }
219 }
220
221 static void
222 destroynotify(XEvent *e)
223 {
224         Client *c;
225         XDestroyWindowEvent *ev = &e->xdestroywindow;
226
227         if((c = getclient(ev->window)))
228                 unmanage(c);
229 }
230
231 static void
232 enternotify(XEvent *e)
233 {
234         Client *c;
235         XCrossingEvent *ev = &e->xcrossing;
236
237         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
238                 return;
239
240         if((c = getclient(ev->window)) || (c = getctitle(ev->window)))
241                 focus(c);
242         else if(ev->window == root) {
243                 issel = True;
244                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
245                 drawall();
246         }
247 }
248
249 static void
250 expose(XEvent *e)
251 {
252         Client *c;
253         XExposeEvent *ev = &e->xexpose;
254
255         if(ev->count == 0) {
256                 if(barwin == ev->window)
257                         drawstatus();
258                 else if((c = getctitle(ev->window)))
259                         drawtitle(c);
260         }
261 }
262
263 static void
264 keypress(XEvent *e)
265 {
266         static unsigned int len = sizeof(key) / sizeof(key[0]);
267         unsigned int i;
268         KeySym keysym;
269         XKeyEvent *ev = &e->xkey;
270
271         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
272         for(i = 0; i < len; i++) {
273                 if(keysym == key[i].keysym &&
274                                 CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
275                 {
276                         if(key[i].func)
277                                 key[i].func(&key[i].arg);
278                         return;
279                 }
280         }
281 }
282
283 static void
284 leavenotify(XEvent *e)
285 {
286         XCrossingEvent *ev = &e->xcrossing;
287
288         if((ev->window == root) && !ev->same_screen) {
289                 issel = False;
290                 drawall();
291         }
292 }
293
294 static void
295 mappingnotify(XEvent *e)
296 {
297         XMappingEvent *ev = &e->xmapping;
298
299         XRefreshKeyboardMapping(ev);
300         if(ev->request == MappingKeyboard)
301                 grabkeys();
302 }
303
304 static void
305 maprequest(XEvent *e)
306 {
307         static XWindowAttributes wa;
308         XMapRequestEvent *ev = &e->xmaprequest;
309
310         if(!XGetWindowAttributes(dpy, ev->window, &wa))
311                 return;
312
313         if(wa.override_redirect) {
314                 XSelectInput(dpy, ev->window,
315                                 (StructureNotifyMask | PropertyChangeMask));
316                 return;
317         }
318
319         if(!getclient(ev->window))
320                 manage(ev->window, &wa);
321 }
322
323 static void
324 propertynotify(XEvent *e)
325 {
326         Client *c;
327         Window trans;
328         XPropertyEvent *ev = &e->xproperty;
329
330         if(ev->state == PropertyDelete)
331                 return; /* ignore */
332
333         if((c = getclient(ev->window))) {
334                 if(ev->atom == wmatom[WMProtocols]) {
335                         c->proto = getproto(c->win);
336                         return;
337                 }
338                 switch (ev->atom) {
339                         default: break;
340                         case XA_WM_TRANSIENT_FOR:
341                                 XGetTransientForHint(dpy, c->win, &trans);
342                                 if(!c->isfloat && (c->isfloat = (trans != 0)))
343                                         arrange(NULL);
344                                 break;
345                         case XA_WM_NORMAL_HINTS:
346                                 updatesize(c);
347                                 break;
348                 }
349                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
350                         updatetitle(c);
351                         drawtitle(c);
352                 }
353         }
354 }
355
356 static void
357 unmapnotify(XEvent *e)
358 {
359         Client *c;
360         XUnmapEvent *ev = &e->xunmap;
361
362         if((c = getclient(ev->window)))
363                 unmanage(c);
364 }
365
366 /* extern */
367
368 void (*handler[LASTEvent]) (XEvent *) = {
369         [ButtonPress] = buttonpress,
370         [ConfigureRequest] = configurerequest,
371         [DestroyNotify] = destroynotify,
372         [EnterNotify] = enternotify,
373         [LeaveNotify] = leavenotify,
374         [Expose] = expose,
375         [KeyPress] = keypress,
376         [MappingNotify] = mappingnotify,
377         [MapRequest] = maprequest,
378         [PropertyNotify] = propertynotify,
379         [UnmapNotify] = unmapnotify
380 };
381
382 void
383 grabkeys()
384 {
385         static unsigned int len = sizeof(key) / sizeof(key[0]);
386         unsigned int i;
387         KeyCode code;
388
389         XUngrabKey(dpy, AnyKey, AnyModifier, root);
390         for(i = 0; i < len; i++) {
391                 code = XKeysymToKeycode(dpy, key[i].keysym);
392                 XGrabKey(dpy, code, key[i].mod, root, True,
393                                 GrabModeAsync, GrabModeAsync);
394                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
395                                 GrabModeAsync, GrabModeAsync);
396                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
397                                 GrabModeAsync, GrabModeAsync);
398                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
399                                 GrabModeAsync, GrabModeAsync);
400         }
401 }
402
403 void
404 procevent()
405 {
406         XEvent ev;
407
408         while(XPending(dpy)) {
409                 XNextEvent(dpy, &ev);
410                 if(handler[ev.type])
411                         (handler[ev.type])(&ev); /* call handler */
412         }
413 }
414