client.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include "dwm.h"
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <X11/Xatom.h>
   6 #include <X11/Xutil.h>
   7
   8 /* static */
   9
  10 static void
  11 attachstack(Client *c) {
  12         c->snext = stack;
  13         stack = c;
  14 }
  15
  16 static void
  17 detachstack(Client *c) {
  18         Client **tc;
  19
  20         for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
  21         *tc = c->snext;
  22 }
  23
  24 static void
  25 grabbuttons(Client *c, Bool focused) {
  26         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
  27
  28         if(focused) {
  29                 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
  30                                 GrabModeAsync, GrabModeSync, None, None);
  31                 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
  32                                 GrabModeAsync, GrabModeSync, None, None);
  33                 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  34                                 GrabModeAsync, GrabModeSync, None, None);
  35                 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  36                                 GrabModeAsync, GrabModeSync, None, None);
  37
  38                 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
  39                                 GrabModeAsync, GrabModeSync, None, None);
  40                 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
  41                                 GrabModeAsync, GrabModeSync, None, None);
  42                 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  43                                 GrabModeAsync, GrabModeSync, None, None);
  44                 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  45                                 GrabModeAsync, GrabModeSync, None, None);
  46
  47                 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
  48                                 GrabModeAsync, GrabModeSync, None, None);
  49                 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
  50                                 GrabModeAsync, GrabModeSync, None, None);
  51                 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  52                                 GrabModeAsync, GrabModeSync, None, None);
  53                 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  54                                 GrabModeAsync, GrabModeSync, None, None);
  55         }
  56         else
  57                 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
  58                                 GrabModeAsync, GrabModeSync, None, None);
  59 }
  60
  61 static Bool
  62 isprotodel(Client *c) {
  63         int i, n;
  64         Atom *protocols;
  65         Bool ret = False;
  66
  67         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
  68                 for(i = 0; !ret && i < n; i++)
  69                         if(protocols[i] == wmatom[WMDelete])
  70                                 ret = True;
  71                 XFree(protocols);
  72         }
  73         return ret;
  74 }
  75
  76 static void
  77 setclientstate(Client *c, long state) {
  78         long data[] = {state, None};
  79
  80         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
  81                         PropModeReplace, (unsigned char *)data, 2);
  82 }
  83
  84 static int
  85 xerrordummy(Display *dsply, XErrorEvent *ee) {
  86         return 0;
  87 }
  88
  89 /* extern */
  90
  91 void
  92 attach(Client *c) {
  93         if(clients)
  94                 clients->prev = c;
  95         c->next = clients;
  96         clients = c;
  97 }
  98
  99 void
 100 ban(Client *c) {
 101         if(c->isbanned)
 102                 return;
 103         XUnmapWindow(dpy, c->win);
 104         setclientstate(c, IconicState);
 105         c->isbanned = True;
 106         c->unmapped++;
 107 }
 108
 109 void
 110 configure(Client *c) {
 111         XConfigureEvent ce;
 112
 113         ce.type = ConfigureNotify;
 114         ce.display = dpy;
 115         ce.event = c->win;
 116         ce.window = c->win;
 117         ce.x = c->x;
 118         ce.y = c->y;
 119         ce.width = c->w;
 120         ce.height = c->h;
 121         ce.border_width = c->border;
 122         ce.above = None;
 123         ce.override_redirect = False;
 124         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 125 }
 126
 127 void
 128 detach(Client *c) {
 129         if(c->prev)
 130                 c->prev->next = c->next;
 131         if(c->next)
 132                 c->next->prev = c->prev;
 133         if(c == clients)
 134                 clients = c->next;
 135         c->next = c->prev = NULL;
 136 }
 137
 138 void
 139 focus(Client *c) {
 140         if((!c && selscreen) || (c && !isvisible(c)))
 141                 for(c = stack; c && !isvisible(c); c = c->snext);
 142         if(sel && sel != c) {
 143                 grabbuttons(sel, False);
 144                 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
 145         }
 146         if(c) {
 147                 detachstack(c);
 148                 attachstack(c);
 149                 grabbuttons(c, True);
 150         }
 151         sel = c;
 152         drawstatus();
 153         if(!selscreen)
 154                 return;
 155         if(c) {
 156                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 157                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 158         }
 159         else
 160                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 161 }
 162
 163 void
 164 killclient(const char *arg) {
 165         XEvent ev;
 166
 167         if(!sel)
 168                 return;
 169         if(isprotodel(sel)) {
 170                 ev.type = ClientMessage;
 171                 ev.xclient.window = sel->win;
 172                 ev.xclient.message_type = wmatom[WMProtocols];
 173                 ev.xclient.format = 32;
 174                 ev.xclient.data.l[0] = wmatom[WMDelete];
 175                 ev.xclient.data.l[1] = CurrentTime;
 176                 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
 177         }
 178         else
 179                 XKillClient(dpy, sel->win);
 180 }
 181
 182 void
 183 manage(Window w, XWindowAttributes *wa) {
 184         Client *c, *t = NULL;
 185         Window trans;
 186         Status rettrans;
 187         XWindowChanges wc;
 188
 189         c = emallocz(sizeof(Client));
 190         c->tags = emallocz(ntags * sizeof(Bool));
 191         c->win = w;
 192         c->x = wa->x;
 193         c->y = wa->y;
 194         c->w = wa->width;
 195         c->h = wa->height;
 196         c->oldborder = wa->border_width;
 197         if(c->w == sw && c->h == sh) {
 198                 c->x = sx;
 199                 c->y = sy;
 200                 c->border = wa->border_width;
 201         }
 202         else {
 203                 if(c->x + c->w + 2 * c->border > wax + waw)
 204                         c->x = wax + waw - c->w - 2 * c->border;
 205                 if(c->y + c->h + 2 * c->border > way + wah)
 206                         c->y = way + wah - c->h - 2 * c->border;
 207                 if(c->x < wax)
 208                         c->x = wax;
 209                 if(c->y < way)
 210                         c->y = way;
 211                 c->border = BORDERPX;
 212         }
 213         wc.border_width = c->border;
 214         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
 215         XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
 216         configure(c); /* propagates border_width, if size doesn't change */
 217         updatesizehints(c);
 218         XSelectInput(dpy, w,
 219                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 220         grabbuttons(c, False);
 221         updatetitle(c);
 222         if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
 223                 for(t = clients; t && t->win != trans; t = t->next);
 224         settags(c, t);
 225         if(!c->isfloating)
 226                 c->isfloating = (rettrans == Success) || c->isfixed;
 227         attach(c);
 228         attachstack(c);
 229         XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
 230         ban(c);
 231         arrange();
 232 }
 233
 234 void
 235 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
 236         double dx, dy, max, min, ratio;
 237         XWindowChanges wc;
 238
 239         if(sizehints) {
 240                 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
 241                         dx = (double)(w - c->basew);
 242                         dy = (double)(h - c->baseh);
 243                         min = (double)(c->minax) / (double)(c->minay);
 244                         max = (double)(c->maxax) / (double)(c->maxay);
 245                         ratio = dx / dy;
 246                         if(max > 0 && min > 0 && ratio > 0) {
 247                                 if(ratio < min) {
 248                                         dy = (dx * min + dy) / (min * min + 1);
 249                                         dx = dy * min;
 250                                         w = (int)dx + c->basew;
 251                                         h = (int)dy + c->baseh;
 252                                 }
 253                                 else if(ratio > max) {
 254                                         dy = (dx * min + dy) / (max * max + 1);
 255                                         dx = dy * min;
 256                                         w = (int)dx + c->basew;
 257                                         h = (int)dy + c->baseh;
 258                                 }
 259                         }
 260                 }
 261                 if(c->minw && w < c->minw)
 262                         w = c->minw;
 263                 if(c->minh && h < c->minh)
 264                         h = c->minh;
 265                 if(c->maxw && w > c->maxw)
 266                         w = c->maxw;
 267                 if(c->maxh && h > c->maxh)
 268                         h = c->maxh;
 269                 if(c->incw)
 270                         w -= (w - c->basew) % c->incw;
 271                 if(c->inch)
 272                         h -= (h - c->baseh) % c->inch;
 273         }
 274         if(w <= 0 || h <= 0)
 275                 return;
 276         /* offscreen appearance fixes */
 277         if(x > sw)
 278                 x = sw - w - 2 * c->border;
 279         if(y > sh)
 280                 y = sh - h - 2 * c->border;
 281         if(x + w + 2 * c->border < sx)
 282                 x = sx;
 283         if(y + h + 2 * c->border < sy)
 284                 y = sy;
 285         if(c->x != x || c->y != y || c->w != w || c->h != h) {
 286                 c->x = wc.x = x;
 287                 c->y = wc.y = y;
 288                 c->w = wc.width = w;
 289                 c->h = wc.height = h;
 290                 wc.border_width = c->border;
 291                 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 292                 configure(c);
 293                 XSync(dpy, False);
 294         }
 295 }
 296
 297 void
 298 unban(Client *c) {
 299         if(!c->isbanned)
 300                 return;
 301         XMapWindow(dpy, c->win);
 302         setclientstate(c, NormalState);
 303         c->isbanned = False;
 304 }
 305
 306 void
 307 unmanage(Client *c, long state) {
 308         XWindowChanges wc;
 309
 310         wc.border_width = c->oldborder;
 311         /* The server grab construct avoids race conditions. */
 312         XGrabServer(dpy);
 313         XSetErrorHandler(xerrordummy);
 314         XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
 315         detach(c);
 316         detachstack(c);
 317         if(sel == c)
 318                 focus(NULL);
 319         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 320         setclientstate(c, state);
 321         free(c->tags);
 322         free(c);
 323         XSync(dpy, False);
 324         XSetErrorHandler(xerror);
 325         XUngrabServer(dpy);
 326         if(state != NormalState)
 327                 arrange();
 328 }
 329
 330 void
 331 updatesizehints(Client *c) {
 332         long msize;
 333         XSizeHints size;
 334
 335         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 336                 size.flags = PSize;
 337         c->flags = size.flags;
 338         if(c->flags & PBaseSize) {
 339                 c->basew = size.base_width;
 340                 c->baseh = size.base_height;
 341         }
 342         else if(c->flags & PMinSize) {
 343                 c->basew = size.min_width;
 344                 c->baseh = size.min_height;
 345         }
 346         else
 347                 c->basew = c->baseh = 0;
 348         if(c->flags & PResizeInc) {
 349                 c->incw = size.width_inc;
 350                 c->inch = size.height_inc;
 351         }
 352         else
 353                 c->incw = c->inch = 0;
 354         if(c->flags & PMaxSize) {
 355                 c->maxw = size.max_width;
 356                 c->maxh = size.max_height;
 357         }
 358         else
 359                 c->maxw = c->maxh = 0;
 360         if(c->flags & PMinSize) {
 361                 c->minw = size.min_width;
 362                 c->minh = size.min_height;
 363         }
 364         else if(c->flags & PBaseSize) {
 365                 c->minw = size.base_width;
 366                 c->minh = size.base_height;
 367         }
 368         else
 369                 c->minw = c->minh = 0;
 370         if(c->flags & PAspect) {
 371                 c->minax = size.min_aspect.x;
 372                 c->maxax = size.max_aspect.x;
 373                 c->minay = size.min_aspect.y;
 374                 c->maxay = size.max_aspect.y;
 375         }
 376         else
 377                 c->minax = c->maxax = c->minay = c->maxay = 0;
 378         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 379                         && c->maxw == c->minw && c->maxh == c->minh);
 380 }
 381
 382 void
 383 updatetitle(Client *c) {
 384         char **list = NULL;
 385         int n;
 386         XTextProperty name;
 387
 388         name.nitems = 0;
 389         c->name[0] = 0;
 390         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 391         if(!name.nitems)
 392                 XGetWMName(dpy, c->win, &name);
 393         if(!name.nitems)
 394                 return;
 395         if(name.encoding == XA_STRING)
 396                 strncpy(c->name, (char *)name.value, sizeof c->name - 1);
 397         else {
 398                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 399                 && n > 0 && *list)
 400                 {
 401                         strncpy(c->name, *list, sizeof c->name - 1);
 402                         XFreeStringList(list);
 403                 }
 404         }
 405         c->name[sizeof c->name - 1] = '\0';
 406         XFree(name.value);
 407 }