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