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 functions */
  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 int
  57 xerrordummy(Display *dsply, XErrorEvent *ee) {
  58         return 0;
  59 }
  60
  61 /* extern functions */
  62
  63 void
  64 configure(Client *c) {
  65         XEvent synev;
  66
  67         synev.type = ConfigureNotify;
  68         synev.xconfigure.display = dpy;
  69         synev.xconfigure.event = c->win;
  70         synev.xconfigure.window = c->win;
  71         synev.xconfigure.x = c->x;
  72         synev.xconfigure.y = c->y;
  73         synev.xconfigure.width = c->w;
  74         synev.xconfigure.height = c->h;
  75         synev.xconfigure.border_width = c->border;
  76         synev.xconfigure.above = None;
  77         XSendEvent(dpy, c->win, True, NoEventMask, &synev);
  78 }
  79
  80 void
  81 focus(Client *c) {
  82         Client *old;
  83
  84         if(!issel || (c && !isvisible(c)))
  85                 return;
  86         if(!sel)
  87                 sel = c;
  88         else if(sel != c) {
  89                 old = sel;
  90                 sel = c;
  91                 if(old) {
  92                         grabbuttons(old, False);
  93                         XSetWindowBorder(dpy, old->win, dc.norm[ColBorder]);
  94                 }
  95         }
  96         if(c) {
  97                 detachstack(c);
  98                 c->snext = stack;
  99                 stack = c;
 100                 grabbuttons(c, True);
 101                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 102                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 103         }
 104         else
 105                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 106         drawstatus();
 107 }
 108
 109 Client *
 110 getclient(Window w) {
 111         Client *c;
 112
 113         for(c = clients; c; c = c->next)
 114                 if(c->win == w)
 115                         return c;
 116         return NULL;
 117 }
 118
 119 void
 120 killclient(Arg *arg) {
 121         if(!sel)
 122                 return;
 123         if(sel->proto & PROTODELWIN)
 124                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 125         else
 126                 XKillClient(dpy, sel->win);
 127 }
 128
 129 void
 130 manage(Window w, XWindowAttributes *wa) {
 131         Client *c;
 132         Window trans;
 133
 134         c = emallocz(sizeof(Client));
 135         c->tags = emallocz(ntags * sizeof(Bool));
 136         c->win = w;
 137         c->border = 0;
 138         c->x = wa->x;
 139         c->y = wa->y;
 140         c->w = wa->width;
 141         c->h = wa->height;
 142         updatesizehints(c);
 143         if(c->x + c->w + 2 * BORDERPX > sw)
 144                 c->x = sw - c->w - 2 * BORDERPX;
 145         if(c->x < sx)
 146                 c->x = sx;
 147         if(c->y + c->h + 2 * BORDERPX > sh)
 148                 c->y = sh - c->h - 2 * BORDERPX;
 149         if(c->h != sh && c->y < bh)
 150                 c->y = bh;
 151         c->proto = getproto(c->win);
 152         XSelectInput(dpy, c->win,
 153                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 154         XGetTransientForHint(dpy, c->win, &trans);
 155         grabbuttons(c, False);
 156         updatetitle(c);
 157         settags(c, getclient(trans));
 158         if(!c->isfloat)
 159                 c->isfloat = trans || c->isfixed;
 160         if(clients)
 161                 clients->prev = c;
 162         c->next = clients;
 163         c->snext = stack;
 164         stack = clients = c;
 165         XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
 166         XMapWindow(dpy, c->win);
 167         if(isvisible(c))
 168                 focus(c);
 169         arrange();
 170 }
 171
 172 void
 173 resize(Client *c, Bool sizehints, Corner sticky) {
 174         int bottom = c->y + c->h;
 175         int right = c->x + c->w;
 176         XWindowChanges wc;
 177
 178         if(sizehints) {
 179                 if(c->incw)
 180                         c->w -= (c->w - c->basew) % c->incw;
 181                 if(c->inch)
 182                         c->h -= (c->h - c->baseh) % c->inch;
 183                 if(c->minw && c->w < c->minw)
 184                         c->w = c->minw;
 185                 if(c->minh && c->h < c->minh)
 186                         c->h = c->minh;
 187                 if(c->maxw && c->w > c->maxw)
 188                         c->w = c->maxw;
 189                 if(c->maxh && c->h > c->maxh)
 190                         c->h = c->maxh;
 191         }
 192         if(sticky == TopRight || sticky == BotRight)
 193                 c->x = right - c->w;
 194         if(sticky == BotLeft || sticky == BotRight)
 195                 c->y = bottom - c->h;
 196         /* offscreen appearance fixes */
 197         if(c->x + c->w < sx)
 198                 c->x = sx;
 199         if(c->y + c->h < bh)
 200                 c->y = bh;
 201         if(c->x > sw)
 202                 c->x = sw - c->w;
 203         if(c->y > sh)
 204                 c->y = sh - c->h;
 205         wc.x = c->x;
 206         wc.y = c->y;
 207         wc.width = c->w;
 208         wc.height = c->h;
 209         if(c->w == sw && c->h == sh)
 210                 wc.border_width = 0;
 211         else
 212                 wc.border_width = BORDERPX;
 213         XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 214         configure(c);
 215         XSync(dpy, False);
 216 }
 217
 218 void
 219 updatesizehints(Client *c) {
 220         long msize;
 221         XSizeHints size;
 222
 223         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 224                 size.flags = PSize;
 225         c->flags = size.flags;
 226         if(c->flags & PBaseSize) {
 227                 c->basew = size.base_width;
 228                 c->baseh = size.base_height;
 229         }
 230         else
 231                 c->basew = c->baseh = 0;
 232         if(c->flags & PResizeInc) {
 233                 c->incw = size.width_inc;
 234                 c->inch = size.height_inc;
 235         }
 236         else
 237                 c->incw = c->inch = 0;
 238         if(c->flags & PMaxSize) {
 239                 c->maxw = size.max_width;
 240                 c->maxh = size.max_height;
 241         }
 242         else
 243                 c->maxw = c->maxh = 0;
 244         if(c->flags & PMinSize) {
 245                 c->minw = size.min_width;
 246                 c->minh = size.min_height;
 247         }
 248         else
 249                 c->minw = c->minh = 0;
 250         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh &&
 251                                 c->maxw == c->minw && c->maxh == c->minh);
 252 }
 253
 254 void
 255 updatetitle(Client *c) {
 256         char **list = NULL;
 257         int n;
 258         XTextProperty name;
 259
 260         name.nitems = 0;
 261         c->name[0] = 0;
 262         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 263         if(!name.nitems)
 264                 XGetWMName(dpy, c->win, &name);
 265         if(!name.nitems)
 266                 return;
 267         if(name.encoding == XA_STRING)
 268                 strncpy(c->name, (char *)name.value, sizeof c->name);
 269         else {
 270                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 271                                 && n > 0 && *list)
 272                 {
 273                         strncpy(c->name, *list, sizeof c->name);
 274                         XFreeStringList(list);
 275                 }
 276         }
 277         XFree(name.value);
 278 }
 279
 280 void
 281 unmanage(Client *c) {
 282         Client *nc;
 283
 284         /* The server grab construct avoids race conditions. */
 285         XGrabServer(dpy);
 286         XSetErrorHandler(xerrordummy);
 287         detach(c);
 288         detachstack(c);
 289         if(sel == c) {
 290                 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
 291                 focus(nc);
 292         }
 293         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 294         free(c->tags);
 295         free(c);
 296         XSync(dpy, False);
 297         XSetErrorHandler(xerror);
 298         XUngrabServer(dpy);
 299         arrange();
 300 }