client.c

   1 /* © 2006-2007 Anselm R. Garbe <garbeam at gmail dot com>
   2  * © 2006-2007 Sander van Dijk <a dot h dot vandijk at gmail dot com>
   3  * © 2007 Premysl Hruby <dfenze at gmail dot com>
   4  * See LICENSE file for license details. */
   5 #include "dwm.h"
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <X11/Xatom.h>
   9 #include <X11/Xutil.h>
  10
  11 /* static */
  12
  13 static void
  14 attachstack(Client *c) {
  15         c->snext = stack;
  16         stack = c;
  17 }
  18
  19 static void
  20 detachstack(Client *c) {
  21         Client **tc;
  22
  23         for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
  24         *tc = c->snext;
  25 }
  26
  27 static void
  28 grabbuttons(Client *c, Bool focused) {
  29         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
  30
  31         if(focused) {
  32                 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
  33                                 GrabModeAsync, GrabModeSync, None, None);
  34                 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
  35                                 GrabModeAsync, GrabModeSync, None, None);
  36                 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  37                                 GrabModeAsync, GrabModeSync, None, None);
  38                 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  39                                 GrabModeAsync, GrabModeSync, None, None);
  40
  41                 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
  42                                 GrabModeAsync, GrabModeSync, None, None);
  43                 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
  44                                 GrabModeAsync, GrabModeSync, None, None);
  45                 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  46                                 GrabModeAsync, GrabModeSync, None, None);
  47                 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  48                                 GrabModeAsync, GrabModeSync, None, None);
  49
  50                 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
  51                                 GrabModeAsync, GrabModeSync, None, None);
  52                 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
  53                                 GrabModeAsync, GrabModeSync, None, None);
  54                 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  55                                 GrabModeAsync, GrabModeSync, None, None);
  56                 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  57                                 GrabModeAsync, GrabModeSync, None, None);
  58         }
  59         else
  60                 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
  61                                 GrabModeAsync, GrabModeSync, None, None);
  62 }
  63
  64 static Bool
  65 isprotodel(Client *c) {
  66         int i, n;
  67         Atom *protocols;
  68         Bool ret = False;
  69
  70         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
  71                 for(i = 0; !ret && i < n; i++)
  72                         if(protocols[i] == wmatom[WMDelete])
  73                                 ret = True;
  74                 XFree(protocols);
  75         }
  76         return ret;
  77 }
  78
  79 static void
  80 setclientstate(Client *c, long state) {
  81         long data[] = {state, None};
  82
  83         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
  84                         PropModeReplace, (unsigned char *)data, 2);
  85 }
  86
  87 static int
  88 xerrordummy(Display *dsply, XErrorEvent *ee) {
  89         return 0;
  90 }
  91
  92 /* extern */
  93
  94 void
  95 attach(Client *c) {
  96         if(clients)
  97                 clients->prev = c;
  98         c->next = clients;
  99         clients = c;
 100 }
 101
 102 void
 103 configure(Client *c) {
 104         XConfigureEvent ce;
 105
 106         ce.type = ConfigureNotify;
 107         ce.display = dpy;
 108         ce.event = c->win;
 109         ce.window = c->win;
 110         ce.x = c->x;
 111         ce.y = c->y;
 112         ce.width = c->w;
 113         ce.height = c->h;
 114         ce.border_width = c->border;
 115         ce.above = None;
 116         ce.override_redirect = False;
 117         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 118 }
 119
 120 void
 121 detach(Client *c) {
 122         if(c->prev)
 123                 c->prev->next = c->next;
 124         if(c->next)
 125                 c->next->prev = c->prev;
 126         if(c == clients)
 127                 clients = c->next;
 128         c->next = c->prev = NULL;
 129 }
 130
 131 void
 132 focus(Client *c) {
 133         if( !c && selscreen || c && !isvisible(c))
 134                 for(c = stack; c && !isvisible(c); c = c->snext);
 135         if(sel && sel != c) {
 136                 grabbuttons(sel, False);
 137                 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
 138         }
 139         if(c) {
 140                 detachstack(c);
 141                 attachstack(c);
 142                 grabbuttons(c, True);
 143         }
 144         sel = c;
 145         drawstatus();
 146         if(!selscreen)
 147                 return;
 148         if(c) {
 149                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 150                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 151         }
 152         else
 153                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 154 }
 155
 156 void
 157 killclient(const char *arg) {
 158         XEvent ev;
 159
 160         if(!sel)
 161                 return;
 162         if(isprotodel(sel)) {
 163                 ev.type = ClientMessage;
 164                 ev.xclient.window = sel->win;
 165                 ev.xclient.message_type = wmatom[WMProtocols];
 166                 ev.xclient.format = 32;
 167                 ev.xclient.data.l[0] = wmatom[WMDelete];
 168                 ev.xclient.data.l[1] = CurrentTime;
 169                 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
 170         }
 171         else
 172                 XKillClient(dpy, sel->win);
 173 }
 174
 175 void
 176 manage(Window w, XWindowAttributes *wa) {
 177         Client *c, *t = NULL;
 178         Window trans;
 179         Status rettrans;
 180         XWindowChanges wc;
 181
 182         c = emallocz(sizeof(Client));
 183         c->tags = emallocz(ntags * sizeof(Bool));
 184         c->win = w;
 185         c->x = wa->x;
 186         c->y = wa->y;
 187         c->w = wa->width;
 188         c->h = wa->height;
 189         c->oldborder = wa->border_width;
 190         if(c->w == sw && c->h == sh) {
 191                 c->x = sx;
 192                 c->y = sy;
 193                 c->border = wa->border_width;
 194         }
 195         else {
 196                 if(c->x + c->w + 2 * c->border > wax + waw)
 197                         c->x = wax + waw - c->w - 2 * c->border;
 198                 if(c->y + c->h + 2 * c->border > way + wah)
 199                         c->y = way + wah - c->h - 2 * c->border;
 200                 if(c->x < wax)
 201                         c->x = wax;
 202                 if(c->y < way)
 203                         c->y = way;
 204                 c->border = BORDERPX;
 205         }
 206         wc.border_width = c->border;
 207         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
 208         XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
 209         configure(c); /* propagates border_width, if size doesn't change */
 210         updatesizehints(c);
 211         XSelectInput(dpy, w,
 212                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 213         grabbuttons(c, False);
 214         updatetitle(c);
 215         if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
 216                 for(t = clients; t && t->win != trans; t = t->next);
 217         settags(c, t);
 218         if(!c->isfloating)
 219                 c->isfloating = (rettrans == Success) || c->isfixed;
 220         attach(c);
 221         attachstack(c);
 222         c->isbanned = True;
 223         XMoveWindow(dpy, w, c->x + 2 * sw, c->y);
 224         XMapWindow(dpy, w);
 225         setclientstate(c, NormalState);
 226         focus(c);
 227         lt->arrange();
 228 }
 229
 230 void
 231 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
 232         float dx, dy, max, min, ratio;
 233         XWindowChanges wc;
 234
 235         if(w <= 0 || h <= 0)
 236                 return;
 237         if(sizehints) {
 238                 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0) {
 239                         dx = (float)(w - c->basew);
 240                         dy = (float)(h - c->baseh);
 241                         min = (float)(c->minax) / (float)(c->minay);
 242                         max = (float)(c->maxax) / (float)(c->maxay);
 243                         ratio = dx / dy;
 244                         if(max > 0 && min > 0 && ratio > 0) {
 245                                 if(ratio < min) {
 246                                         dy = (dx * min + dy) / (min * min + 1);
 247                                         dx = dy * min;
 248                                         w = (int)dx + c->basew;
 249                                         h = (int)dy + c->baseh;
 250                                 }
 251                                 else if(ratio > max) {
 252                                         dy = (dx * min + dy) / (max * max + 1);
 253                                         dx = dy * min;
 254                                         w = (int)dx + c->basew;
 255                                         h = (int)dy + c->baseh;
 256                                 }
 257                         }
 258                 }
 259                 if(c->minw && w < c->minw)
 260                         w = c->minw;
 261                 if(c->minh && h < c->minh)
 262                         h = c->minh;
 263                 if(c->maxw && w > c->maxw)
 264                         w = c->maxw;
 265                 if(c->maxh && h > c->maxh)
 266                         h = c->maxh;
 267                 if(c->incw)
 268                         w -= (w - c->basew) % c->incw;
 269                 if(c->inch)
 270                         h -= (h - c->baseh) % c->inch;
 271         }
 272         if(w <= 0 || h <= 0)
 273                 return;
 274         /* offscreen appearance fixes */
 275         if(x > sw)
 276                 x = sw - w - 2 * c->border;
 277         if(y > sh)
 278                 y = sh - h - 2 * c->border;
 279         if(x + w + 2 * c->border < sx)
 280                 x = sx;
 281         if(y + h + 2 * c->border < sy)
 282                 y = sy;
 283         if(c->x != x || c->y != y || c->w != w || c->h != h) {
 284                 c->x = wc.x = x;
 285                 c->y = wc.y = y;
 286                 c->w = wc.width = w;
 287                 c->h = wc.height = h;
 288                 wc.border_width = c->border;
 289                 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 290                 configure(c);
 291                 XSync(dpy, False);
 292         }
 293 }
 294
 295 void
 296 togglefloating(const char *arg) {
 297         if(!sel || lt->arrange == floating)
 298                 return;
 299         sel->isfloating = !sel->isfloating;
 300         if(sel->isfloating)
 301                 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
 302         lt->arrange();
 303 }
 304
 305 void
 306 updatesizehints(Client *c) {
 307         long msize;
 308         XSizeHints size;
 309
 310         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 311                 size.flags = PSize;
 312         c->flags = size.flags;
 313         if(c->flags & PBaseSize) {
 314                 c->basew = size.base_width;
 315                 c->baseh = size.base_height;
 316         }
 317         else if(c->flags & PMinSize) {
 318                 c->basew = size.min_width;
 319                 c->baseh = size.min_height;
 320         }
 321         else
 322                 c->basew = c->baseh = 0;
 323         if(c->flags & PResizeInc) {
 324                 c->incw = size.width_inc;
 325                 c->inch = size.height_inc;
 326         }
 327         else
 328                 c->incw = c->inch = 0;
 329         if(c->flags & PMaxSize) {
 330                 c->maxw = size.max_width;
 331                 c->maxh = size.max_height;
 332         }
 333         else
 334                 c->maxw = c->maxh = 0;
 335         if(c->flags & PMinSize) {
 336                 c->minw = size.min_width;
 337                 c->minh = size.min_height;
 338         }
 339         else if(c->flags & PBaseSize) {
 340                 c->minw = size.base_width;
 341                 c->minh = size.base_height;
 342         }
 343         else
 344                 c->minw = c->minh = 0;
 345         if(c->flags & PAspect) {
 346                 c->minax = size.min_aspect.x;
 347                 c->maxax = size.max_aspect.x;
 348                 c->minay = size.min_aspect.y;
 349                 c->maxay = size.max_aspect.y;
 350         }
 351         else
 352                 c->minax = c->maxax = c->minay = c->maxay = 0;
 353         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 354                         && c->maxw == c->minw && c->maxh == c->minh);
 355 }
 356
 357 void
 358 updatetitle(Client *c) {
 359         char **list = NULL;
 360         int n;
 361         XTextProperty name;
 362
 363         name.nitems = 0;
 364         c->name[0] = 0;
 365         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 366         if(!name.nitems)
 367                 XGetWMName(dpy, c->win, &name);
 368         if(!name.nitems)
 369                 return;
 370         if(name.encoding == XA_STRING)
 371                 strncpy(c->name, (char *)name.value, sizeof c->name - 1);
 372         else {
 373                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 374                 && n > 0 && *list)
 375                 {
 376                         strncpy(c->name, *list, sizeof c->name - 1);
 377                         XFreeStringList(list);
 378                 }
 379         }
 380         c->name[sizeof c->name - 1] = '\0';
 381         XFree(name.value);
 382 }
 383
 384 void
 385 unmanage(Client *c) {
 386         XWindowChanges wc;
 387
 388         wc.border_width = c->oldborder;
 389         /* The server grab construct avoids race conditions. */
 390         XGrabServer(dpy);
 391         XSetErrorHandler(xerrordummy);
 392         XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
 393         detach(c);
 394         detachstack(c);
 395         if(sel == c)
 396                 focus(NULL);
 397         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 398         setclientstate(c, WithdrawnState);
 399         free(c->tags);
 400         free(c);
 401         XSync(dpy, False);
 402         XSetErrorHandler(xerror);
 403         XUngrabServer(dpy);
 404         lt->arrange();
 405 }