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