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 grabbuttons(Client *c, Bool focused) {
  14         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
  15
  16         if(focused) {
  17                 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
  18                                 GrabModeAsync, GrabModeSync, None, None);
  19                 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
  20                                 GrabModeAsync, GrabModeSync, None, None);
  21                 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  22                                 GrabModeAsync, GrabModeSync, None, None);
  23                 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  24                                 GrabModeAsync, GrabModeSync, None, None);
  25
  26                 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
  27                                 GrabModeAsync, GrabModeSync, None, None);
  28                 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
  29                                 GrabModeAsync, GrabModeSync, None, None);
  30                 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  31                                 GrabModeAsync, GrabModeSync, None, None);
  32                 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  33                                 GrabModeAsync, GrabModeSync, None, None);
  34
  35                 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
  36                                 GrabModeAsync, GrabModeSync, None, None);
  37                 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
  38                                 GrabModeAsync, GrabModeSync, None, None);
  39                 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  40                                 GrabModeAsync, GrabModeSync, None, None);
  41                 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  42                                 GrabModeAsync, GrabModeSync, None, None);
  43         }
  44         else
  45                 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
  46                                 GrabModeAsync, GrabModeSync, None, None);
  47 }
  48
  49 static void
  50 setclientstate(Client *c, long state) {
  51         long data[] = {state, None};
  52         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
  53                         PropModeReplace, (unsigned char *)data, 2);
  54 }
  55
  56 static int
  57 xerrordummy(Display *dsply, XErrorEvent *ee) {
  58         return 0;
  59 }
  60
  61 /* extern */
  62
  63 void
  64 configure(Client *c) {
  65         XConfigureEvent ce;
  66
  67         ce.type = ConfigureNotify;
  68         ce.display = dpy;
  69         ce.event = c->win;
  70         ce.window = c->win;
  71         ce.x = c->x;
  72         ce.y = c->y;
  73         ce.width = c->w;
  74         ce.height = c->h;
  75         ce.border_width = c->border;
  76         ce.above = None;
  77         ce.override_redirect = False;
  78         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
  79 }
  80
  81 void
  82 focus(Client *c) {
  83         if(c && !isvisible(c))
  84                 return;
  85         if(sel && sel != c) {
  86                 grabbuttons(sel, False);
  87                 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
  88         }
  89         if(c) {
  90                 detachstack(c);
  91                 attachstack(c);
  92                 grabbuttons(c, True);
  93         }
  94         sel = c;
  95         drawstatus();
  96         if(!selscreen)
  97                 return;
  98         if(c) {
  99                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 100                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 101         }
 102         else
 103                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 104 }
 105
 106 Bool
 107 isprotodel(Client *c) {
 108         int i, n;
 109         Atom *protocols;
 110         Bool ret = False;
 111
 112         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
 113                 for(i = 0; !ret && i < n; i++)
 114                         if(protocols[i] == wmatom[WMDelete])
 115                                 ret = True;
 116                 XFree(protocols);
 117         }
 118         return ret;
 119 }
 120
 121 void
 122 killclient(Arg *arg) {
 123         if(!sel)
 124                 return;
 125         if(isprotodel(sel))
 126                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 127         else
 128                 XKillClient(dpy, sel->win);
 129 }
 130
 131 void
 132 manage(Window w, XWindowAttributes *wa) {
 133         Client *c, *t;
 134         Window trans;
 135         XWindowChanges wc;
 136
 137         c = emallocz(sizeof(Client));
 138         c->tags = emallocz(ntags * sizeof(Bool));
 139         c->win = w;
 140         c->x = wa->x;
 141         c->y = wa->y;
 142         c->w = wa->width;
 143         c->h = wa->height;
 144         if(c->w == sw && c->h == sh) {
 145                 c->border = 0;
 146                 c->x = sx;
 147                 c->y = sy;
 148         }
 149         else {
 150                 c->border = BORDERPX;
 151                 if(c->x + c->w + 2 * c->border > wax + waw)
 152                         c->x = wax + waw - c->w - 2 * c->border;
 153                 if(c->y + c->h + 2 * c->border > way + wah)
 154                         c->y = way + wah - c->h - 2 * c->border;
 155                 if(c->x < wax)
 156                         c->x = wax;
 157                 if(c->y < way)
 158                         c->y = way;
 159         }
 160         updatesizehints(c);
 161         XSelectInput(dpy, c->win,
 162                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 163         XGetTransientForHint(dpy, c->win, &trans);
 164         grabbuttons(c, False);
 165         wc.border_width = c->border;
 166         XConfigureWindow(dpy, c->win, CWBorderWidth, &wc);
 167         XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
 168         configure(c); /* propagates border_width, if size doesn't change */
 169         updatetitle(c);
 170         t = getclient(trans);
 171         settags(c, t);
 172         if(!c->isfloat)
 173                 c->isfloat = (t != 0) || c->isfixed;
 174         attach(c);
 175         attachstack(c);
 176         c->isbanned = True;
 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, int x, int y, int w, int h, Bool sizehints) {
 187         float actual, dx, dy, max, min;
 188         XWindowChanges wc;
 189
 190         if(w <= 0 || h <= 0)
 191                 return;
 192         if(sizehints) {
 193                 if(c->minw && w < c->minw)
 194                         w = c->minw;
 195                 if(c->minh && h < c->minh)
 196                         h = c->minh;
 197                 if(c->maxw && w > c->maxw)
 198                         w = c->maxw;
 199                 if(c->maxh && h > c->maxh)
 200                         h = c->maxh;
 201                 /* inspired by algorithm from fluxbox */
 202                 if(c->minay > 0 && c->maxay && (h - c->baseh) > 0) {
 203                         dx = (float)(w - c->basew);
 204                         dy = (float)(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                                         w = (int)dx + c->basew;
 213                                         h = (int)dy + c->baseh;
 214                                 }
 215                                 else if(actual > max) {
 216                                         dy = (dx * min + dy) / (max * max + 1);
 217                                         dx = dy * min;
 218                                         w = (int)dx + c->basew;
 219                                         h = (int)dy + c->baseh;
 220                                 }
 221                         }
 222                 }
 223                 if(c->incw)
 224                         w -= (w - c->basew) % c->incw;
 225                 if(c->inch)
 226                         h -= (h - c->baseh) % c->inch;
 227         }
 228         if(w == sw && h == sh)
 229                 c->border = 0;
 230         else
 231                 c->border = BORDERPX;
 232         /* offscreen appearance fixes */
 233         if(x > sw)
 234                 x = sw - w - 2 * c->border;
 235         if(y > sh)
 236                 y = sh - h - 2 * c->border;
 237         if(x + w + 2 * c->border < sx)
 238                 x = sx;
 239         if(y + h + 2 * c->border < sy)
 240                 y = sy;
 241         if(c->x != x || c->y != y || c->w != w || c->h != h) {
 242                 c->x = wc.x = x;
 243                 c->y = wc.y = y;
 244                 c->w = wc.width = w;
 245                 c->h = wc.height = h;
 246                 wc.border_width = c->border;
 247                 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 248                 configure(c);
 249                 XSync(dpy, False);
 250         }
 251 }
 252
 253 void
 254 updatesizehints(Client *c) {
 255         long msize;
 256         XSizeHints size;
 257
 258         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 259                 size.flags = PSize;
 260         c->flags = size.flags;
 261         if(c->flags & PBaseSize) {
 262                 c->basew = size.base_width;
 263                 c->baseh = size.base_height;
 264         }
 265         else
 266                 c->basew = c->baseh = 0;
 267         if(c->flags & PResizeInc) {
 268                 c->incw = size.width_inc;
 269                 c->inch = size.height_inc;
 270         }
 271         else
 272                 c->incw = c->inch = 0;
 273         if(c->flags & PMaxSize) {
 274                 c->maxw = size.max_width;
 275                 c->maxh = size.max_height;
 276         }
 277         else
 278                 c->maxw = c->maxh = 0;
 279         if(c->flags & PMinSize) {
 280                 c->minw = size.min_width;
 281                 c->minh = size.min_height;
 282         }
 283         else
 284                 c->minw = c->minh = 0;
 285         if(c->flags & PAspect) {
 286                 c->minax = size.min_aspect.x;
 287                 c->minay = size.min_aspect.y;
 288                 c->maxax = size.max_aspect.x;
 289                 c->maxay = size.max_aspect.y;
 290         }
 291         else
 292                 c->minax = c->minay = c->maxax = c->maxay = 0;
 293         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 294                         && c->maxw == c->minw && c->maxh == c->minh);
 295 }
 296
 297 void
 298 updatetitle(Client *c) {
 299         char **list = NULL;
 300         int n;
 301         XTextProperty name;
 302
 303         name.nitems = 0;
 304         c->name[0] = 0;
 305         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 306         if(!name.nitems)
 307                 XGetWMName(dpy, c->win, &name);
 308         if(!name.nitems)
 309                 return;
 310         if(name.encoding == XA_STRING)
 311                 strncpy(c->name, (char *)name.value, sizeof c->name);
 312         else {
 313                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 314                 && n > 0 && *list)
 315                 {
 316                         strncpy(c->name, *list, sizeof c->name);
 317                         XFreeStringList(list);
 318                 }
 319         }
 320         XFree(name.value);
 321 }
 322
 323 void
 324 unmanage(Client *c) {
 325         Client *nc;
 326
 327         /* The server grab construct avoids race conditions. */
 328         XGrabServer(dpy);
 329         XSetErrorHandler(xerrordummy);
 330         detach(c);
 331         detachstack(c);
 332         if(sel == c) {
 333                 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
 334                 focus(nc);
 335         }
 336         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 337         setclientstate(c, WithdrawnState);
 338         free(c->tags);
 339         free(c);
 340         XSync(dpy, False);
 341         XSetErrorHandler(xerror);
 342         XUngrabServer(dpy);
 343         arrange();
 344 }