client.c

   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
  12 static void
  13 detachstack(Client *c) {
  14         Client **tc;
  15         for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
  16         *tc = c->snext;
  17 }
  18
  19 static void
  20 grabbuttons(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
  56 static void
  57 setclientstate(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
  63 static int
  64 xerrordummy(Display *dsply, XErrorEvent *ee) {
  65         return 0;
  66 }
  67
  68 /* extern */
  69
  70 void
  71 ban(Client *c) {
  72         if(!c || c->isbanned)
  73                 return;
  74         c->isbanned = True;
  75         XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
  76 }
  77
  78 void
  79 configure(Client *c) {
  80         XConfigureEvent ce;
  81
  82         ce.type = ConfigureNotify;
  83         ce.display = dpy;
  84         ce.event = c->win;
  85         ce.window = c->win;
  86         ce.x = c->x;
  87         ce.y = c->y;
  88         ce.width = c->w;
  89         ce.height = c->h;
  90         ce.border_width = c->border;
  91         ce.above = None;
  92         ce.override_redirect = False;
  93         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
  94 }
  95
  96 void
  97 focus(Client *c) {
  98         if(c && !isvisible(c))
  99                 return;
 100         if(sel && sel != c) {
 101                 grabbuttons(sel, False);
 102                 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
 103         }
 104         if(c) {
 105                 detachstack(c);
 106                 c->snext = stack;
 107                 stack = c;
 108                 grabbuttons(c, True);
 109         }
 110         sel = c;
 111         drawstatus();
 112         if(!selscreen)
 113                 return;
 114         if(c) {
 115                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 116                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 117         }
 118         else
 119                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 120 }
 121
 122 Client *
 123 getclient(Window w) {
 124         Client *c;
 125
 126         for(c = clients; c; c = c->next)
 127                 if(c->win == w)
 128                         return c;
 129         return NULL;
 130 }
 131
 132 Bool
 133 isprotodel(Client *c) {
 134         int i, n;
 135         Atom *protocols;
 136         Bool ret = False;
 137
 138         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
 139                 for(i = 0; !ret && i < n; i++)
 140                         if(protocols[i] == wmatom[WMDelete])
 141                                 ret = True;
 142                 XFree(protocols);
 143         }
 144         return ret;
 145 }
 146
 147 void
 148 killclient(Arg *arg) {
 149         if(!sel)
 150                 return;
 151         if(isprotodel(sel))
 152                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 153         else
 154                 XKillClient(dpy, sel->win);
 155 }
 156
 157 void
 158 manage(Window w, XWindowAttributes *wa) {
 159         Client *c, *t;
 160         Window trans;
 161         XWindowChanges wc;
 162
 163         c = emallocz(sizeof(Client));
 164         c->tags = emallocz(ntags * sizeof(Bool));
 165         c->win = w;
 166         c->x = wa->x;
 167         c->y = wa->y;
 168         c->w = wa->width;
 169         c->h = wa->height;
 170         if(c->w == sw && c->h == sh) {
 171                 c->border = 0;
 172                 c->x = sx;
 173                 c->y = sy;
 174         }
 175         else {
 176                 c->border = BORDERPX;
 177                 if(c->x + c->w + 2 * c->border > wax + waw)
 178                         c->x = wax + waw - c->w - 2 * c->border;
 179                 if(c->y + c->h + 2 * c->border > way + wah)
 180                         c->y = way + wah - c->h - 2 * c->border;
 181                 if(c->x < wax)
 182                         c->x = wax;
 183                 if(c->y < way)
 184                         c->y = way;
 185         }
 186         updatesizehints(c);
 187         XSelectInput(dpy, c->win,
 188                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 189         XGetTransientForHint(dpy, c->win, &trans);
 190         grabbuttons(c, False);
 191         wc.border_width = c->border;
 192         XConfigureWindow(dpy, c->win, CWBorderWidth, &wc);
 193         XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
 194         configure(c); /* propagates border_width, if size doesn't change */
 195         updatetitle(c);
 196         t = getclient(trans);
 197         settags(c, t);
 198         if(!c->isfloat)
 199                 c->isfloat = (t != 0) || c->isfixed;
 200         if(clients)
 201                 clients->prev = c;
 202         c->next = clients;
 203         c->snext = stack;
 204         stack = clients = c;
 205         c->isbanned = True;
 206         XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
 207         XMapWindow(dpy, c->win);
 208         setclientstate(c, NormalState);
 209         if(isvisible(c))
 210                 focus(c);
 211         arrange();
 212 }
 213
 214 void
 215 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
 216         float actual, dx, dy, max, min;
 217         XWindowChanges wc;
 218
 219         if(w <= 0 || h <= 0)
 220                 return;
 221         if(sizehints) {
 222                 if(c->minw && w < c->minw)
 223                         w = c->minw;
 224                 if(c->minh && h < c->minh)
 225                         h = c->minh;
 226                 if(c->maxw && w > c->maxw)
 227                         w = c->maxw;
 228                 if(c->maxh && h > c->maxh)
 229                         h = c->maxh;
 230                 /* inspired by algorithm from fluxbox */
 231                 if(c->minay > 0 && c->maxay && (h - c->baseh) > 0) {
 232                         dx = (float)(w - c->basew);
 233                         dy = (float)(h - c->baseh);
 234                         min = (float)(c->minax) / (float)(c->minay);
 235                         max = (float)(c->maxax) / (float)(c->maxay);
 236                         actual = dx / dy;
 237                         if(max > 0 && min > 0 && actual > 0) {
 238                                 if(actual < min) {
 239                                         dy = (dx * min + dy) / (min * min + 1);
 240                                         dx = dy * min;
 241                                         w = (int)dx + c->basew;
 242                                         h = (int)dy + c->baseh;
 243                                 }
 244                                 else if(actual > max) {
 245                                         dy = (dx * min + dy) / (max * max + 1);
 246                                         dx = dy * min;
 247                                         w = (int)dx + c->basew;
 248                                         h = (int)dy + c->baseh;
 249                                 }
 250                         }
 251                 }
 252                 if(c->incw)
 253                         w -= (w - c->basew) % c->incw;
 254                 if(c->inch)
 255                         h -= (h - c->baseh) % c->inch;
 256         }
 257         if(w == sw && h == sh)
 258                 c->border = 0;
 259         else
 260                 c->border = BORDERPX;
 261         /* offscreen appearance fixes */
 262         if(x > sw)
 263                 x = sw - w - 2 * c->border;
 264         if(y > sh)
 265                 y = sh - h - 2 * c->border;
 266         if(x + w + 2 * c->border < sx)
 267                 x = sx;
 268         if(y + h + 2 * c->border < sy)
 269                 y = sy;
 270         if(c->x != x || c->y != y || c->w != w || c->h != h) {
 271                 c->x = wc.x = x;
 272                 c->y = wc.y = y;
 273                 c->w = wc.width = w;
 274                 c->h = wc.height = h;
 275                 wc.border_width = c->border;
 276                 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 277                 configure(c);
 278                 XSync(dpy, False);
 279         }
 280 }
 281
 282 void
 283 updatesizehints(Client *c) {
 284         long msize;
 285         XSizeHints size;
 286
 287         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 288                 size.flags = PSize;
 289         c->flags = size.flags;
 290         if(c->flags & PBaseSize) {
 291                 c->basew = size.base_width;
 292                 c->baseh = size.base_height;
 293         }
 294         else
 295                 c->basew = c->baseh = 0;
 296         if(c->flags & PResizeInc) {
 297                 c->incw = size.width_inc;
 298                 c->inch = size.height_inc;
 299         }
 300         else
 301                 c->incw = c->inch = 0;
 302         if(c->flags & PMaxSize) {
 303                 c->maxw = size.max_width;
 304                 c->maxh = size.max_height;
 305         }
 306         else
 307                 c->maxw = c->maxh = 0;
 308         if(c->flags & PMinSize) {
 309                 c->minw = size.min_width;
 310                 c->minh = size.min_height;
 311         }
 312         else
 313                 c->minw = c->minh = 0;
 314         if(c->flags & PAspect) {
 315                 c->minax = size.min_aspect.x;
 316                 c->minay = size.min_aspect.y;
 317                 c->maxax = size.max_aspect.x;
 318                 c->maxay = size.max_aspect.y;
 319         }
 320         else
 321                 c->minax = c->minay = c->maxax = c->maxay = 0;
 322         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 323                         && c->maxw == c->minw && c->maxh == c->minh);
 324 }
 325
 326 void
 327 updatetitle(Client *c) {
 328         char **list = NULL;
 329         int n;
 330         XTextProperty name;
 331
 332         name.nitems = 0;
 333         c->name[0] = 0;
 334         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 335         if(!name.nitems)
 336                 XGetWMName(dpy, c->win, &name);
 337         if(!name.nitems)
 338                 return;
 339         if(name.encoding == XA_STRING)
 340                 strncpy(c->name, (char *)name.value, sizeof c->name);
 341         else {
 342                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 343                 && n > 0 && *list)
 344                 {
 345                         strncpy(c->name, *list, sizeof c->name);
 346                         XFreeStringList(list);
 347                 }
 348         }
 349         XFree(name.value);
 350 }
 351
 352 void
 353 unmanage(Client *c) {
 354         Client *nc;
 355
 356         /* The server grab construct avoids race conditions. */
 357         XGrabServer(dpy);
 358         XSetErrorHandler(xerrordummy);
 359         detach(c);
 360         detachstack(c);
 361         if(sel == c) {
 362                 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
 363                 focus(nc);
 364         }
 365         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 366         setclientstate(c, WithdrawnState);
 367         free(c->tags);
 368         free(c);
 369         XSync(dpy, False);
 370         XSetErrorHandler(xerror);
 371         XUngrabServer(dpy);
 372         arrange();
 373 }