client.c (view raw)
1/* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
2 * See LICENSE file for license details.
3 */
4#include "dwm.h"
5#include <stdlib.h>
6#include <string.h>
7#include <X11/Xatom.h>
8#include <X11/Xutil.h>
9
10/* static */
11
12static void
13detachstack(Client *c) {
14 Client **tc;
15 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
16 *tc = c->snext;
17}
18
19static void
20grabbuttons(Client *c, Bool focused) {
21 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
22
23 if(focused) {
24 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
25 GrabModeAsync, GrabModeSync, None, None);
26 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
27 GrabModeAsync, GrabModeSync, None, None);
28 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
29 GrabModeAsync, GrabModeSync, None, None);
30 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
31 GrabModeAsync, GrabModeSync, None, None);
32
33 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
34 GrabModeAsync, GrabModeSync, None, None);
35 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
36 GrabModeAsync, GrabModeSync, None, None);
37 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
38 GrabModeAsync, GrabModeSync, None, None);
39 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
40 GrabModeAsync, GrabModeSync, None, None);
41
42 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
43 GrabModeAsync, GrabModeSync, None, None);
44 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
45 GrabModeAsync, GrabModeSync, None, None);
46 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
47 GrabModeAsync, GrabModeSync, None, None);
48 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
49 GrabModeAsync, GrabModeSync, None, None);
50 }
51 else
52 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
53 GrabModeAsync, GrabModeSync, None, None);
54}
55
56static void
57setclientstate(Client *c, long state) {
58 long data[] = {state, None};
59 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
60 PropModeReplace, (unsigned char *)data, 2);
61}
62
63static int
64xerrordummy(Display *dsply, XErrorEvent *ee) {
65 return 0;
66}
67
68/* extern */
69
70void
71configure(Client *c) {
72 XConfigureEvent ce;
73
74 ce.type = ConfigureNotify;
75 ce.display = dpy;
76 ce.event = c->win;
77 ce.window = c->win;
78 ce.x = c->x;
79 ce.y = c->y;
80 ce.width = c->w;
81 ce.height = c->h;
82 ce.border_width = c->border;
83 ce.above = None;
84 ce.override_redirect = False;
85 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
86}
87
88void
89focus(Client *c) {
90 if(c && !isvisible(c))
91 return;
92 if(sel && sel != c) {
93 grabbuttons(sel, False);
94 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
95 }
96 if(c) {
97 detachstack(c);
98 c->snext = stack;
99 stack = c;
100 grabbuttons(c, True);
101 }
102 sel = c;
103 drawstatus();
104 if(!selscreen)
105 return;
106 if(c) {
107 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
108 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
109 }
110 else
111 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
112}
113
114Client *
115getclient(Window w) {
116 Client *c;
117
118 for(c = clients; c; c = c->next)
119 if(c->win == w)
120 return c;
121 return NULL;
122}
123
124Bool
125isprotodel(Client *c) {
126 int i, n;
127 Atom *protocols;
128 Bool ret = False;
129
130 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
131 for(i = 0; !ret && i < n; i++)
132 if(protocols[i] == wmatom[WMDelete])
133 ret = True;
134 XFree(protocols);
135 }
136 return ret;
137}
138
139void
140killclient(Arg *arg) {
141 if(!sel)
142 return;
143 if(isprotodel(sel))
144 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
145 else
146 XKillClient(dpy, sel->win);
147}
148
149void
150manage(Window w, XWindowAttributes *wa) {
151 Client *c, *t;
152 Window trans;
153
154 c = emallocz(sizeof(Client));
155 c->tags = emallocz(ntags * sizeof(Bool));
156 c->win = w;
157 c->x = wa->x;
158 c->y = wa->y;
159 c->w = wa->width;
160 c->h = wa->height;
161 if(c->w == sw && c->h == sh) {
162 c->border = 0;
163 c->x = sx;
164 c->y = sy;
165 }
166 else {
167 c->border = BORDERPX;
168 if(c->x + c->w + 2 * c->border > wax + waw)
169 c->x = wax + waw - c->w - 2 * c->border;
170 if(c->y + c->h + 2 * c->border > way + wah)
171 c->y = way + wah - c->h - 2 * c->border;
172 if(c->x < wax)
173 c->x = wax;
174 if(c->y < way)
175 c->y = way;
176 }
177 updatesizehints(c);
178 XSelectInput(dpy, c->win,
179 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
180 XGetTransientForHint(dpy, c->win, &trans);
181 grabbuttons(c, False);
182 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
183 updatetitle(c);
184 t = getclient(trans);
185 settags(c, t);
186 if(!c->isfloat)
187 c->isfloat = (t != 0) || c->isfixed;
188 if(clients)
189 clients->prev = c;
190 c->next = clients;
191 c->snext = stack;
192 stack = clients = c;
193 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
194 XMapWindow(dpy, c->win);
195 setclientstate(c, NormalState);
196 if(isvisible(c))
197 focus(c);
198 arrange();
199}
200
201void
202resize(Client *c, Bool sizehints) {
203 float actual, dx, dy, max, min;
204 XWindowChanges wc;
205
206 if(c->w <= 0 || c->h <= 0)
207 return;
208 if(sizehints) {
209 if(c->minw && c->w < c->minw)
210 c->w = c->minw;
211 if(c->minh && c->h < c->minh)
212 c->h = c->minh;
213 if(c->maxw && c->w > c->maxw)
214 c->w = c->maxw;
215 if(c->maxh && c->h > c->maxh)
216 c->h = c->maxh;
217 /* inspired by algorithm from fluxbox */
218 if(c->minay > 0 && c->maxay && (c->h - c->baseh) > 0) {
219 dx = (float)(c->w - c->basew);
220 dy = (float)(c->h - c->baseh);
221 min = (float)(c->minax) / (float)(c->minay);
222 max = (float)(c->maxax) / (float)(c->maxay);
223 actual = dx / dy;
224 if(max > 0 && min > 0 && actual > 0) {
225 if(actual < min) {
226 dy = (dx * min + dy) / (min * min + 1);
227 dx = dy * min;
228 c->w = (int)dx + c->basew;
229 c->h = (int)dy + c->baseh;
230 }
231 else if(actual > max) {
232 dy = (dx * min + dy) / (max * max + 1);
233 dx = dy * min;
234 c->w = (int)dx + c->basew;
235 c->h = (int)dy + c->baseh;
236 }
237 }
238 }
239 if(c->incw)
240 c->w -= (c->w - c->basew) % c->incw;
241 if(c->inch)
242 c->h -= (c->h - c->baseh) % c->inch;
243 }
244 if(c->w == sw && c->h == sh)
245 c->border = 0;
246 else
247 c->border = BORDERPX;
248 /* offscreen appearance fixes */
249 if(c->x > sw)
250 c->x = sw - c->w - 2 * c->border;
251 if(c->y > sh)
252 c->y = sh - c->h - 2 * c->border;
253 if(c->x + c->w + 2 * c->border < sx)
254 c->x = sx;
255 if(c->y + c->h + 2 * c->border < sy)
256 c->y = sy;
257 wc.x = c->x;
258 wc.y = c->y;
259 wc.width = c->w;
260 wc.height = c->h;
261 wc.border_width = c->border;
262 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
263 configure(c);
264 XSync(dpy, False);
265}
266
267void
268updatesizehints(Client *c) {
269 long msize;
270 XSizeHints size;
271
272 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
273 size.flags = PSize;
274 c->flags = size.flags;
275 if(c->flags & PBaseSize) {
276 c->basew = size.base_width;
277 c->baseh = size.base_height;
278 }
279 else
280 c->basew = c->baseh = 0;
281 if(c->flags & PResizeInc) {
282 c->incw = size.width_inc;
283 c->inch = size.height_inc;
284 }
285 else
286 c->incw = c->inch = 0;
287 if(c->flags & PMaxSize) {
288 c->maxw = size.max_width;
289 c->maxh = size.max_height;
290 }
291 else
292 c->maxw = c->maxh = 0;
293 if(c->flags & PMinSize) {
294 c->minw = size.min_width;
295 c->minh = size.min_height;
296 }
297 else
298 c->minw = c->minh = 0;
299 if(c->flags & PAspect) {
300 c->minax = size.min_aspect.x;
301 c->minay = size.min_aspect.y;
302 c->maxax = size.max_aspect.x;
303 c->maxay = size.max_aspect.y;
304 }
305 else
306 c->minax = c->minay = c->maxax = c->maxay = 0;
307 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
308 && c->maxw == c->minw && c->maxh == c->minh);
309}
310
311void
312updatetitle(Client *c) {
313 char **list = NULL;
314 int n;
315 XTextProperty name;
316
317 name.nitems = 0;
318 c->name[0] = 0;
319 XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
320 if(!name.nitems)
321 XGetWMName(dpy, c->win, &name);
322 if(!name.nitems)
323 return;
324 if(name.encoding == XA_STRING)
325 strncpy(c->name, (char *)name.value, sizeof c->name);
326 else {
327 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
328 && n > 0 && *list)
329 {
330 strncpy(c->name, *list, sizeof c->name);
331 XFreeStringList(list);
332 }
333 }
334 XFree(name.value);
335}
336
337void
338unmanage(Client *c) {
339 Client *nc;
340
341 /* The server grab construct avoids race conditions. */
342 XGrabServer(dpy);
343 XSetErrorHandler(xerrordummy);
344 detach(c);
345 detachstack(c);
346 if(sel == c) {
347 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
348 focus(nc);
349 }
350 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
351 setclientstate(c, WithdrawnState);
352 free(c->tags);
353 free(c);
354 XSync(dpy, False);
355 XSetErrorHandler(xerror);
356 XUngrabServer(dpy);
357 arrange();
358}