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 configure(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
  88 void
  89 focus(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
 114 Client *
 115 getclient(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
 124 Bool
 125 isprotodel(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
 139 void
 140 killclient(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
 149 void
 150 manage(Window w, XWindowAttributes *wa) {
 151         Client *c, *t;
 152         Window trans;
 153         XWindowChanges wc;
 154
 155         c = emallocz(sizeof(Client));
 156         c->tags = emallocz(ntags * sizeof(Bool));
 157         c->win = w;
 158         c->x = wa->x;
 159         c->y = wa->y;
 160         c->w = wa->width;
 161         c->h = wa->height;
 162         if(c->w == sw && c->h == sh) {
 163                 c->border = 0;
 164                 c->x = sx;
 165                 c->y = sy;
 166         }
 167         else {
 168                 c->border = BORDERPX;
 169                 if(c->x + c->w + 2 * c->border > wax + waw)
 170                         c->x = wax + waw - c->w - 2 * c->border;
 171                 if(c->y + c->h + 2 * c->border > way + wah)
 172                         c->y = way + wah - c->h - 2 * c->border;
 173                 if(c->x < wax)
 174                         c->x = wax;
 175                 if(c->y < way)
 176                         c->y = way;
 177         }
 178         updatesizehints(c);
 179         XSelectInput(dpy, c->win,
 180                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 181         XGetTransientForHint(dpy, c->win, &trans);
 182         grabbuttons(c, False);
 183         wc.border_width = c->border;
 184         XConfigureWindow(dpy, c->win, CWBorderWidth, &wc);
 185         XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
 186         configure(c); /* propagates border_width, if size doesn't change */
 187         updatetitle(c);
 188         t = getclient(trans);
 189         settags(c, t);
 190         if(!c->isfloat)
 191                 c->isfloat = (t != 0) || c->isfixed;
 192         if(clients)
 193                 clients->prev = c;
 194         c->next = clients;
 195         c->snext = stack;
 196         stack = clients = c;
 197         c->isbanned = True;
 198         XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
 199         XMapWindow(dpy, c->win);
 200         setclientstate(c, NormalState);
 201         if(isvisible(c))
 202                 focus(c);
 203         arrange();
 204 }
 205
 206 void
 207 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
 208         float actual, dx, dy, max, min;
 209         XWindowChanges wc;
 210
 211         if(w <= 0 || h <= 0)
 212                 return;
 213         if(sizehints) {
 214                 if(c->minw && w < c->minw)
 215                         w = c->minw;
 216                 if(c->minh && h < c->minh)
 217                         h = c->minh;
 218                 if(c->maxw && w > c->maxw)
 219                         w = c->maxw;
 220                 if(c->maxh && h > c->maxh)
 221                         h = c->maxh;
 222                 /* inspired by algorithm from fluxbox */
 223                 if(c->minay > 0 && c->maxay && (h - c->baseh) > 0) {
 224                         dx = (float)(w - c->basew);
 225                         dy = (float)(h - c->baseh);
 226                         min = (float)(c->minax) / (float)(c->minay);
 227                         max = (float)(c->maxax) / (float)(c->maxay);
 228                         actual = dx / dy;
 229                         if(max > 0 && min > 0 && actual > 0) {
 230                                 if(actual < min) {
 231                                         dy = (dx * min + dy) / (min * min + 1);
 232                                         dx = dy * min;
 233                                         w = (int)dx + c->basew;
 234                                         h = (int)dy + c->baseh;
 235                                 }
 236                                 else if(actual > max) {
 237                                         dy = (dx * min + dy) / (max * max + 1);
 238                                         dx = dy * min;
 239                                         w = (int)dx + c->basew;
 240                                         h = (int)dy + c->baseh;
 241                                 }
 242                         }
 243                 }
 244                 if(c->incw)
 245                         w -= (w - c->basew) % c->incw;
 246                 if(c->inch)
 247                         h -= (h - c->baseh) % c->inch;
 248         }
 249         if(w == sw && h == sh)
 250                 c->border = 0;
 251         else
 252                 c->border = BORDERPX;
 253         /* offscreen appearance fixes */
 254         if(x > sw)
 255                 x = sw - w - 2 * c->border;
 256         if(y > sh)
 257                 y = sh - h - 2 * c->border;
 258         if(x + w + 2 * c->border < sx)
 259                 x = sx;
 260         if(y + h + 2 * c->border < sy)
 261                 y = sy;
 262         if(c->x != x || c->y != y || c->w != w || c->h != h) {
 263                 c->x = wc.x = x;
 264                 c->y = wc.y = y;
 265                 c->w = wc.width = w;
 266                 c->h = wc.height = h;
 267                 wc.border_width = c->border;
 268                 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 269                 configure(c);
 270                 XSync(dpy, False);
 271         }
 272 }
 273
 274 void
 275 updatesizehints(Client *c) {
 276         long msize;
 277         XSizeHints size;
 278
 279         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 280                 size.flags = PSize;
 281         c->flags = size.flags;
 282         if(c->flags & PBaseSize) {
 283                 c->basew = size.base_width;
 284                 c->baseh = size.base_height;
 285         }
 286         else
 287                 c->basew = c->baseh = 0;
 288         if(c->flags & PResizeInc) {
 289                 c->incw = size.width_inc;
 290                 c->inch = size.height_inc;
 291         }
 292         else
 293                 c->incw = c->inch = 0;
 294         if(c->flags & PMaxSize) {
 295                 c->maxw = size.max_width;
 296                 c->maxh = size.max_height;
 297         }
 298         else
 299                 c->maxw = c->maxh = 0;
 300         if(c->flags & PMinSize) {
 301                 c->minw = size.min_width;
 302                 c->minh = size.min_height;
 303         }
 304         else
 305                 c->minw = c->minh = 0;
 306         if(c->flags & PAspect) {
 307                 c->minax = size.min_aspect.x;
 308                 c->minay = size.min_aspect.y;
 309                 c->maxax = size.max_aspect.x;
 310                 c->maxay = size.max_aspect.y;
 311         }
 312         else
 313                 c->minax = c->minay = c->maxax = c->maxay = 0;
 314         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 315                         && c->maxw == c->minw && c->maxh == c->minh);
 316 }
 317
 318 void
 319 updatetitle(Client *c) {
 320         char **list = NULL;
 321         int n;
 322         XTextProperty name;
 323
 324         name.nitems = 0;
 325         c->name[0] = 0;
 326         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 327         if(!name.nitems)
 328                 XGetWMName(dpy, c->win, &name);
 329         if(!name.nitems)
 330                 return;
 331         if(name.encoding == XA_STRING)
 332                 strncpy(c->name, (char *)name.value, sizeof c->name);
 333         else {
 334                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 335                 && n > 0 && *list)
 336                 {
 337                         strncpy(c->name, *list, sizeof c->name);
 338                         XFreeStringList(list);
 339                 }
 340         }
 341         XFree(name.value);
 342 }
 343
 344 void
 345 unmanage(Client *c) {
 346         Client *nc;
 347
 348         /* The server grab construct avoids race conditions. */
 349         XGrabServer(dpy);
 350         XSetErrorHandler(xerrordummy);
 351         detach(c);
 352         detachstack(c);
 353         if(sel == c) {
 354                 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
 355                 focus(nc);
 356         }
 357         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 358         setclientstate(c, WithdrawnState);
 359         free(c->tags);
 360         free(c);
 361         XSync(dpy, False);
 362         XSetErrorHandler(xerror);
 363         XUngrabServer(dpy);
 364         arrange();
 365 }