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 void
 124 killclient(Arg *arg) {
 125         if(!sel)
 126                 return;
 127         if(sel->proto & PROTODELWIN)
 128                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 129         else
 130                 XKillClient(dpy, sel->win);
 131 }
 132
 133 void
 134 manage(Window w, XWindowAttributes *wa) {
 135         Client *c;
 136         Window trans;
 137
 138         c = emallocz(sizeof(Client));
 139         c->tags = emallocz(ntags * sizeof(Bool));
 140         c->win = w;
 141         c->x = wa->x;
 142         c->y = wa->y;
 143         c->w = wa->width;
 144         c->h = wa->height;
 145         if(c->w == sw && c->h == sh) {
 146                 c->border = 0;
 147                 c->x = sx;
 148                 c->y = sy;
 149         }
 150         else {
 151                 c->border = BORDERPX;
 152                 if(c->x + c->w + 2 * c->border > wax + waw)
 153                         c->x = wax + waw - c->w - 2 * c->border;
 154                 if(c->y + c->h + 2 * c->border > way + wah)
 155                         c->y = way + wah - c->h - 2 * c->border;
 156                 if(c->x < wax)
 157                         c->x = wax;
 158                 if(c->y < way)
 159                         c->y = way;
 160         }
 161         updatesizehints(c);
 162         c->proto = getproto(c->win);
 163         XSelectInput(dpy, c->win,
 164                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 165         XGetTransientForHint(dpy, c->win, &trans);
 166         grabbuttons(c, False);
 167         XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
 168         updatetitle(c);
 169         settags(c, getclient(trans));
 170         if(!c->isfloat)
 171                 c->isfloat = trans || c->isfixed;
 172         if(clients)
 173                 clients->prev = c;
 174         c->next = clients;
 175         c->snext = stack;
 176         stack = clients = c;
 177         XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
 178         XMapWindow(dpy, c->win);
 179         setclientstate(c, NormalState);
 180         if(isvisible(c))
 181                 focus(c);
 182         arrange();
 183 }
 184
 185 void
 186 resize(Client *c, Bool sizehints) {
 187         float actual, dx, dy, max, min, u;
 188         XWindowChanges wc;
 189
 190         if(c->w <= 0 || c->h <= 0)
 191                 return;
 192         if(sizehints) {
 193                 if(c->minw && c->w < c->minw)
 194                         c->w = c->minw;
 195                 if(c->minh && c->h < c->minh)
 196                         c->h = c->minh;
 197                 if(c->maxw && c->w > c->maxw)
 198                         c->w = c->maxw;
 199                 if(c->maxh && c->h > c->maxh)
 200                         c->h = c->maxh;
 201                 /* inspired by algorithm from fluxbox */
 202                 if(c->minay > 0 && c->maxay && (c->h - c->baseh) > 0) {
 203                         dx = (float)(c->w - c->basew);
 204                         dy = (float)(c->h - c->baseh);
 205                         min = (float)(c->minax) / (float)(c->minay);
 206                         max = (float)(c->maxax) / (float)(c->maxay);
 207                         actual = dx / dy;
 208                         if(max > 0 && min > 0 && actual > 0) {
 209                                 if(actual < min) {
 210                                         dy = (dx * min + dy) / (min * min + 1);
 211                                         dx = dy * min;
 212                                         c->w = (int)dx + c->basew;
 213                                         c->h = (int)dy + c->baseh;
 214                                 }
 215                                 else if(actual > max) {
 216                                         dy = (dx * min + dy) / (max * max + 1);
 217                                         dx = dy * min;
 218                                         c->w = (int)dx + c->basew;
 219                                         c->h = (int)dy + c->baseh;
 220                                 }
 221                         }
 222                 }
 223                 if(c->incw)
 224                         c->w -= (c->w - c->basew) % c->incw;
 225                 if(c->inch)
 226                         c->h -= (c->h - c->baseh) % c->inch;
 227         }
 228         if(c->w == sw && c->h == sh)
 229                 c->border = 0;
 230         else
 231                 c->border = BORDERPX;
 232         /* offscreen appearance fixes */
 233         if(c->x > sw)
 234                 c->x = sw - c->w - 2 * c->border;
 235         if(c->y > sh)
 236                 c->y = sh - c->h - 2 * c->border;
 237         if(c->x + c->w + 2 * c->border < sx)
 238                 c->x = sx;
 239         if(c->y + c->h + 2 * c->border < sy)
 240                 c->y = sy;
 241         wc.x = c->x;
 242         wc.y = c->y;
 243         wc.width = c->w;
 244         wc.height = c->h;
 245         wc.border_width = c->border;
 246         XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 247         configure(c);
 248         XSync(dpy, False);
 249 }
 250
 251 void
 252 updatesizehints(Client *c) {
 253         long msize;
 254         XSizeHints size;
 255
 256         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 257                 size.flags = PSize;
 258         c->flags = size.flags;
 259         if(c->flags & PBaseSize) {
 260                 c->basew = size.base_width;
 261                 c->baseh = size.base_height;
 262         }
 263         else
 264                 c->basew = c->baseh = 0;
 265         if(c->flags & PResizeInc) {
 266                 c->incw = size.width_inc;
 267                 c->inch = size.height_inc;
 268         }
 269         else
 270                 c->incw = c->inch = 0;
 271         if(c->flags & PMaxSize) {
 272                 c->maxw = size.max_width;
 273                 c->maxh = size.max_height;
 274         }
 275         else
 276                 c->maxw = c->maxh = 0;
 277         if(c->flags & PMinSize) {
 278                 c->minw = size.min_width;
 279                 c->minh = size.min_height;
 280         }
 281         else
 282                 c->minw = c->minh = 0;
 283         if(c->flags & PAspect) {
 284                 c->minax = size.min_aspect.x;
 285                 c->minay = size.min_aspect.y;
 286                 c->maxax = size.max_aspect.x;
 287                 c->maxay = size.max_aspect.y;
 288         }
 289         else
 290                 c->minax = c->minay = c->maxax = c->maxay = 0;
 291         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh &&
 292                                 c->maxw == c->minw && c->maxh == c->minh);
 293 }
 294
 295 void
 296 updatetitle(Client *c) {
 297         char **list = NULL;
 298         int n;
 299         XTextProperty name;
 300
 301         name.nitems = 0;
 302         c->name[0] = 0;
 303         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 304         if(!name.nitems)
 305                 XGetWMName(dpy, c->win, &name);
 306         if(!name.nitems)
 307                 return;
 308         if(name.encoding == XA_STRING)
 309                 strncpy(c->name, (char *)name.value, sizeof c->name);
 310         else {
 311                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 312                                 && n > 0 && *list)
 313                 {
 314                         strncpy(c->name, *list, sizeof c->name);
 315                         XFreeStringList(list);
 316                 }
 317         }
 318         XFree(name.value);
 319 }
 320
 321 void
 322 unmanage(Client *c) {
 323         Client *nc;
 324
 325         /* The server grab construct avoids race conditions. */
 326         XGrabServer(dpy);
 327         XSetErrorHandler(xerrordummy);
 328         detach(c);
 329         detachstack(c);
 330         if(sel == c) {
 331                 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
 332                 focus(nc);
 333         }
 334         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 335         setclientstate(c, WithdrawnState);
 336         free(c->tags);
 337         free(c);
 338         XSync(dpy, False);
 339         XSetErrorHandler(xerror);
 340         XUngrabServer(dpy);
 341         arrange();
 342 }