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                         drawclient(old);
  94                 }
  95         }
  96         if(c) {
  97                 detachstack(c);
  98                 c->snext = stack;
  99                 stack = c;
 100                 grabbuttons(c, True);
 101                 drawclient(c);
 102                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 103         }
 104         else
 105                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 106 }
 107
 108 Client *
 109 getclient(Window w) {
 110         Client *c;
 111
 112         for(c = clients; c; c = c->next)
 113                 if(c->win == w)
 114                         return c;
 115         return NULL;
 116 }
 117
 118 void
 119 killclient(Arg *arg) {
 120         if(!sel)
 121                 return;
 122         if(sel->proto & PROTODELWIN)
 123                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 124         else
 125                 XKillClient(dpy, sel->win);
 126 }
 127
 128 void
 129 manage(Window w, XWindowAttributes *wa) {
 130         Client *c;
 131         Window trans;
 132
 133         c = emallocz(sizeof(Client));
 134         c->tags = emallocz(ntags * sizeof(Bool));
 135         c->win = w;
 136         c->border = 0;
 137         c->x = wa->x;
 138         c->y = wa->y;
 139         c->w = wa->width;
 140         c->h = wa->height;
 141         updatesizehints(c);
 142         if(c->x + c->w + 2 * BORDERPX > sw)
 143                 c->x = sw - c->w - 2 * BORDERPX;
 144         if(c->x < sx)
 145                 c->x = sx;
 146         if(c->y + c->h + 2 * BORDERPX > sh)
 147                 c->y = sh - c->h - 2 * BORDERPX;
 148         if(c->h != sh && c->y < bh)
 149                 c->y = bh;
 150         c->proto = getproto(c->win);
 151         XSelectInput(dpy, c->win,
 152                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 153         XGetTransientForHint(dpy, c->win, &trans);
 154         grabbuttons(c, False);
 155         updatetitle(c);
 156         settags(c, getclient(trans));
 157         if(!c->isfloat)
 158                 c->isfloat = trans || c->isfixed;
 159         if(clients)
 160                 clients->prev = c;
 161         c->next = clients;
 162         c->snext = stack;
 163         stack = clients = c;
 164         XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
 165         XMapWindow(dpy, c->win);
 166         if(isvisible(c))
 167                 focus(c);
 168         arrange();
 169 }
 170
 171 void
 172 resize(Client *c, Bool sizehints, Corner sticky) {
 173         int bottom = c->y + c->h;
 174         int right = c->x + c->w;
 175         XWindowChanges wc;
 176
 177         if(sizehints) {
 178                 if(c->incw)
 179                         c->w -= (c->w - c->basew) % c->incw;
 180                 if(c->inch)
 181                         c->h -= (c->h - c->baseh) % c->inch;
 182                 if(c->minw && c->w < c->minw)
 183                         c->w = c->minw;
 184                 if(c->minh && c->h < c->minh)
 185                         c->h = c->minh;
 186                 if(c->maxw && c->w > c->maxw)
 187                         c->w = c->maxw;
 188                 if(c->maxh && c->h > c->maxh)
 189                         c->h = c->maxh;
 190         }
 191         if(sticky == TopRight || sticky == BotRight)
 192                 c->x = right - c->w;
 193         if(sticky == BotLeft || sticky == BotRight)
 194                 c->y = bottom - c->h;
 195         /* offscreen appearance fixes */
 196         if(c->x + c->w < sx)
 197                 c->x = sx;
 198         if(c->y + c->h < bh)
 199                 c->y = bh;
 200         if(c->x > sw)
 201                 c->x = sw - c->w;
 202         if(c->y > sh)
 203                 c->y = sh - c->h;
 204         wc.x = c->x;
 205         wc.y = c->y;
 206         wc.width = c->w;
 207         wc.height = c->h;
 208         if(c->w == sw && c->h == sh)
 209                 wc.border_width = 0;
 210         else
 211                 wc.border_width = BORDERPX;
 212         XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 213         configure(c);
 214         XSync(dpy, False);
 215 }
 216
 217 void
 218 updatesizehints(Client *c) {
 219         long msize;
 220         XSizeHints size;
 221
 222         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 223                 size.flags = PSize;
 224         c->flags = size.flags;
 225         if(c->flags & PBaseSize) {
 226                 c->basew = size.base_width;
 227                 c->baseh = size.base_height;
 228         }
 229         else
 230                 c->basew = c->baseh = 0;
 231         if(c->flags & PResizeInc) {
 232                 c->incw = size.width_inc;
 233                 c->inch = size.height_inc;
 234         }
 235         else
 236                 c->incw = c->inch = 0;
 237         if(c->flags & PMaxSize) {
 238                 c->maxw = size.max_width;
 239                 c->maxh = size.max_height;
 240         }
 241         else
 242                 c->maxw = c->maxh = 0;
 243         if(c->flags & PMinSize) {
 244                 c->minw = size.min_width;
 245                 c->minh = size.min_height;
 246         }
 247         else
 248                 c->minw = c->minh = 0;
 249         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh &&
 250                                 c->maxw == c->minw && c->maxh == c->minh);
 251 }
 252
 253 void
 254 updatetitle(Client *c) {
 255         char **list = NULL;
 256         int n;
 257         XTextProperty name;
 258
 259         name.nitems = 0;
 260         c->name[0] = 0;
 261         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 262         if(!name.nitems)
 263                 XGetWMName(dpy, c->win, &name);
 264         if(!name.nitems)
 265                 return;
 266         if(name.encoding == XA_STRING)
 267                 strncpy(c->name, (char *)name.value, sizeof c->name);
 268         else {
 269                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 270                                 && n > 0 && *list)
 271                 {
 272                         strncpy(c->name, *list, sizeof c->name);
 273                         XFreeStringList(list);
 274                 }
 275         }
 276         XFree(name.value);
 277 }
 278
 279 void
 280 unmanage(Client *c) {
 281         Client *nc;
 282
 283         /* The server grab construct avoids race conditions. */
 284         XGrabServer(dpy);
 285         XSetErrorHandler(xerrordummy);
 286         detach(c);
 287         detachstack(c);
 288         if(sel == c) {
 289                 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
 290                 focus(nc);
 291         }
 292         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 293         free(c->tags);
 294         free(c);
 295         XSync(dpy, False);
 296         XSetErrorHandler(xerror);
 297         XUngrabServer(dpy);
 298         arrange();
 299 }