client.c

   1 /* (C)opyright MMVI 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 ban(Client *c) {
  65         XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
  66         XMoveWindow(dpy, c->twin, c->tx + 2 * sw, c->ty);
  67 }
  68
  69 void
  70 configure(Client *c) {
  71         XEvent synev;
  72
  73         synev.type = ConfigureNotify;
  74         synev.xconfigure.display = dpy;
  75         synev.xconfigure.event = c->win;
  76         synev.xconfigure.window = c->win;
  77         synev.xconfigure.x = c->x;
  78         synev.xconfigure.y = c->y;
  79         synev.xconfigure.width = c->w;
  80         synev.xconfigure.height = c->h;
  81         synev.xconfigure.border_width = c->border;
  82         synev.xconfigure.above = None;
  83         XSendEvent(dpy, c->win, True, NoEventMask, &synev);
  84 }
  85
  86 void
  87 focus(Client *c) {
  88         Client *old;
  89
  90         if(!issel || (c && !isvisible(c)))
  91                 return;
  92         if(!sel)
  93                 sel = c;
  94         else if(sel != c) {
  95                 old = sel;
  96                 sel = c;
  97                 if(old) {
  98                         grabbuttons(old, False);
  99                         drawtitle(old);
 100                 }
 101         }
 102         if(c) {
 103                 detachstack(c);
 104                 c->snext = stack;
 105                 stack = c;
 106                 grabbuttons(c, True);
 107                 drawtitle(c);
 108                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 109         }
 110         else
 111                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 112 }
 113
 114 Client *
 115 getclient(Window w) {
 116         Client *c;
 117
 118         for(c = clients; c; c = c->next)
 119                 if(c->win == w)
 120                         return c;
 121         return NULL;
 122 }
 123
 124 Client *
 125 getctitle(Window w) {
 126         Client *c;
 127
 128         for(c = clients; c; c = c->next)
 129                 if(c->twin == w)
 130                         return c;
 131         return NULL;
 132 }
 133
 134 void
 135 killclient(Arg *arg) {
 136         if(!sel)
 137                 return;
 138         if(sel->proto & PROTODELWIN)
 139                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 140         else
 141                 XKillClient(dpy, sel->win);
 142 }
 143
 144 void
 145 manage(Window w, XWindowAttributes *wa) {
 146         Client *c;
 147         Window trans;
 148         XSetWindowAttributes twa;
 149
 150         c = emallocz(sizeof(Client));
 151         c->tags = emallocz(ntags * sizeof(Bool));
 152         c->win = w;
 153         c->border = 0;
 154         c->x = c->tx = wa->x;
 155         c->y = c->ty = wa->y;
 156         c->w = c->tw = wa->width;
 157         c->h = wa->height;
 158         c->th = bh;
 159         updatesizehints(c);
 160         if(c->x + c->w + 2 * BORDERPX > sw)
 161                 c->x = sw - c->w - 2 * BORDERPX;
 162         if(c->x < sx)
 163                 c->x = sx;
 164         if(c->y + c->h + 2 * BORDERPX > sh)
 165                 c->y = sh - c->h - 2 * BORDERPX;
 166         if(c->h != sh && c->y < bh)
 167                 c->y = bh;
 168         c->proto = getproto(c->win);
 169         XSelectInput(dpy, c->win,
 170                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 171         XGetTransientForHint(dpy, c->win, &trans);
 172         twa.override_redirect = 1;
 173         twa.background_pixmap = ParentRelative;
 174         twa.event_mask = ExposureMask | EnterWindowMask;
 175         c->twin = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
 176                         0, DefaultDepth(dpy, screen), CopyFromParent,
 177                         DefaultVisual(dpy, screen),
 178                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
 179         grabbuttons(c, False);
 180         updatetitle(c);
 181         settags(c, getclient(trans));
 182         if(!c->isfloat)
 183                 c->isfloat = trans || c->isfixed;
 184         resizetitle(c);
 185         if(clients)
 186                 clients->prev = c;
 187         c->next = clients;
 188         c->snext = stack;
 189         stack = clients = c;
 190         ban(c);
 191         XMapWindow(dpy, c->win);
 192         XMapWindow(dpy, c->twin);
 193         if(isvisible(c))
 194                 focus(c);
 195         arrange();
 196 }
 197
 198 void
 199 resize(Client *c, Bool sizehints, Corner sticky) {
 200         int bottom = c->y + c->h;
 201         int right = c->x + c->w;
 202         XWindowChanges wc;
 203
 204         if(sizehints) {
 205                 if(c->incw)
 206                         c->w -= (c->w - c->basew) % c->incw;
 207                 if(c->inch)
 208                         c->h -= (c->h - c->baseh) % c->inch;
 209                 if(c->minw && c->w < c->minw)
 210                         c->w = c->minw;
 211                 if(c->minh && c->h < c->minh)
 212                         c->h = c->minh;
 213                 if(c->maxw && c->w > c->maxw)
 214                         c->w = c->maxw;
 215                 if(c->maxh && c->h > c->maxh)
 216                         c->h = c->maxh;
 217         }
 218         if(sticky == TopRight || sticky == BotRight)
 219                 c->x = right - c->w;
 220         if(sticky == BotLeft || sticky == BotRight)
 221                 c->y = bottom - c->h;
 222         /* offscreen appearance fixes */
 223         if(c->x + c->w < sx)
 224                 c->x = sx;
 225         if(c->y + c->h < bh)
 226                 c->y = bh;
 227         if(c->x > sw)
 228                 c->x = sw - c->w;
 229         if(c->y > sh)
 230                 c->y = sh - c->h;
 231         resizetitle(c);
 232         wc.x = c->x;
 233         wc.y = c->y;
 234         wc.width = c->w;
 235         wc.height = c->h;
 236         if(c->w == sw && c->h == sh)
 237                 wc.border_width = 0;
 238         else
 239                 wc.border_width = BORDERPX;
 240         XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 241         configure(c);
 242         XSync(dpy, False);
 243 }
 244
 245 void
 246 resizetitle(Client *c) {
 247         c->tw = textw(c->name);
 248         if(c->tw > c->w)
 249                 c->tw = c->w + 2 * BORDERPX;
 250         c->tx = c->x + c->w - c->tw + 2 * BORDERPX;
 251         c->ty = c->y;
 252         if(isvisible(c))
 253                 XMoveResizeWindow(dpy, c->twin, c->tx, c->ty, c->tw, c->th);
 254         else
 255                 XMoveResizeWindow(dpy, c->twin, c->tx + 2 * sw, c->ty, c->tw, c->th);
 256 }
 257
 258 void
 259 updatesizehints(Client *c) {
 260         long msize;
 261         XSizeHints size;
 262
 263         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 264                 size.flags = PSize;
 265         c->flags = size.flags;
 266         if(c->flags & PBaseSize) {
 267                 c->basew = size.base_width;
 268                 c->baseh = size.base_height;
 269         }
 270         else
 271                 c->basew = c->baseh = 0;
 272         if(c->flags & PResizeInc) {
 273                 c->incw = size.width_inc;
 274                 c->inch = size.height_inc;
 275         }
 276         else
 277                 c->incw = c->inch = 0;
 278         if(c->flags & PMaxSize) {
 279                 c->maxw = size.max_width;
 280                 c->maxh = size.max_height;
 281         }
 282         else
 283                 c->maxw = c->maxh = 0;
 284         if(c->flags & PMinSize) {
 285                 c->minw = size.min_width;
 286                 c->minh = size.min_height;
 287         }
 288         else
 289                 c->minw = c->minh = 0;
 290         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh &&
 291                                 c->maxw == c->minw && c->maxh == c->minh);
 292 }
 293
 294 void
 295 updatetitle(Client *c) {
 296         char **list = NULL;
 297         int n;
 298         XTextProperty name;
 299
 300         name.nitems = 0;
 301         c->name[0] = 0;
 302         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 303         if(!name.nitems)
 304                 XGetWMName(dpy, c->win, &name);
 305         if(!name.nitems)
 306                 return;
 307         if(name.encoding == XA_STRING)
 308                 strncpy(c->name, (char *)name.value, sizeof c->name);
 309         else {
 310                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 311                                 && n > 0 && *list)
 312                 {
 313                         strncpy(c->name, *list, sizeof c->name);
 314                         XFreeStringList(list);
 315                 }
 316         }
 317         XFree(name.value);
 318 }
 319
 320 void
 321 unmanage(Client *c) {
 322         Client *nc;
 323
 324         /* The server grab construct avoids race conditions. */
 325         XGrabServer(dpy);
 326         XSetErrorHandler(xerrordummy);
 327         detach(c);
 328         detachstack(c);
 329         if(sel == c) {
 330                 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
 331                 focus(nc);
 332         }
 333         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 334         XDestroyWindow(dpy, c->twin);
 335         free(c->tags);
 336         free(c);
 337         XSync(dpy, False);
 338         XSetErrorHandler(xerror);
 339         XUngrabServer(dpy);
 340         arrange();
 341 }