client.c

   1 /*
   2  * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
   3  * See LICENSE file for license details.
   4  */
   5 #include "dwm.h"
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <X11/Xatom.h>
   9 #include <X11/Xutil.h>
  10
  11 /* static functions */
  12
  13 static void
  14 grabbutton(Client *c, unsigned int button, unsigned int modifier)
  15 {
  16         XGrabButton(dpy, button, modifier, c->win, False, BUTTONMASK,
  17                         GrabModeAsync, GrabModeSync, None, None);
  18         XGrabButton(dpy, button, modifier | LockMask, c->win, False, BUTTONMASK,
  19                         GrabModeAsync, GrabModeSync, None, None);
  20         XGrabButton(dpy, button, modifier | numlockmask, c->win, False, BUTTONMASK,
  21                         GrabModeAsync, GrabModeSync, None, None);
  22         XGrabButton(dpy, button, modifier | numlockmask | LockMask, c->win, False, BUTTONMASK,
  23                         GrabModeAsync, GrabModeSync, None, None);
  24 }
  25
  26 static void
  27 resizetitle(Client *c)
  28 {
  29         int i;
  30
  31         c->tw = 0;
  32         for(i = 0; i < ntags; i++)
  33                 if(c->tags[i])
  34                         c->tw += textw(tags[i]);
  35         c->tw += textw(c->name);
  36         if(c->tw > c->w)
  37                 c->tw = c->w + 2;
  38         c->tx = c->x + c->w - c->tw + 2;
  39         c->ty = c->y;
  40         if(isvisible(c))
  41                 XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
  42         else
  43                 XMoveResizeWindow(dpy, c->title, c->tx + 2 * sw, c->ty, c->tw, c->th);
  44
  45 }
  46
  47 static void
  48 ungrabbutton(Client *c, unsigned int button, unsigned int modifier)
  49 {
  50         XUngrabButton(dpy, button, modifier, c->win);
  51         XUngrabButton(dpy, button, modifier | LockMask, c->win);
  52         XUngrabButton(dpy, button, modifier | numlockmask, c->win);
  53         XUngrabButton(dpy, button, modifier | numlockmask | LockMask, c->win);
  54 }
  55
  56 static int
  57 xerrordummy(Display *dsply, XErrorEvent *ee)
  58 {
  59         return 0;
  60 }
  61
  62 /* extern functions */
  63
  64 void
  65 ban(Client *c)
  66 {
  67         XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
  68         XMoveWindow(dpy, c->title, c->tx + 2 * sw, c->ty);
  69 }
  70
  71 void
  72 focus(Client *c)
  73 {
  74         Client *old = sel;
  75
  76         if(!issel)
  77                 return;
  78         if(!sel)
  79                 sel = c;
  80         else if(sel != c) {
  81                 if(sel->ismax)
  82                         togglemax(NULL);
  83                 sel = c;
  84                 grabbutton(old, AnyButton, 0);
  85                 drawtitle(old);
  86         }
  87         ungrabbutton(c, AnyButton, 0);
  88         drawtitle(c);
  89         XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
  90 }
  91
  92 Client *
  93 getclient(Window w)
  94 {
  95         Client *c;
  96
  97         for(c = clients; c; c = c->next)
  98                 if(c->win == w)
  99                         return c;
 100         return NULL;
 101 }
 102
 103 Client *
 104 getctitle(Window w)
 105 {
 106         Client *c;
 107
 108         for(c = clients; c; c = c->next)
 109                 if(c->title == w)
 110                         return c;
 111         return NULL;
 112 }
 113
 114 void
 115 gravitate(Client *c, Bool invert)
 116 {
 117         int dx = 0, dy = 0;
 118
 119         switch(c->grav) {
 120         default:
 121                 break;
 122         case StaticGravity:
 123         case NorthWestGravity:
 124         case NorthGravity:
 125         case NorthEastGravity:
 126                 dy = c->border;
 127                 break;
 128         case EastGravity:
 129         case CenterGravity:
 130         case WestGravity:
 131                 dy = -(c->h / 2) + c->border;
 132                 break;
 133         case SouthEastGravity:
 134         case SouthGravity:
 135         case SouthWestGravity:
 136                 dy = -(c->h);
 137                 break;
 138         }
 139
 140         switch (c->grav) {
 141         default:
 142                 break;
 143         case StaticGravity:
 144         case NorthWestGravity:
 145         case WestGravity:
 146         case SouthWestGravity:
 147                 dx = c->border;
 148                 break;
 149         case NorthGravity:
 150         case CenterGravity:
 151         case SouthGravity:
 152                 dx = -(c->w / 2) + c->border;
 153                 break;
 154         case NorthEastGravity:
 155         case EastGravity:
 156         case SouthEastGravity:
 157                 dx = -(c->w + c->border);
 158                 break;
 159         }
 160
 161         if(invert) {
 162                 dx = -dx;
 163                 dy = -dy;
 164         }
 165         c->x += dx;
 166         c->y += dy;
 167 }
 168
 169 void
 170 killclient(Arg *arg)
 171 {
 172         if(!sel)
 173                 return;
 174         if(sel->proto & PROTODELWIN)
 175                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 176         else
 177                 XKillClient(dpy, sel->win);
 178 }
 179
 180 void
 181 manage(Window w, XWindowAttributes *wa)
 182 {
 183         unsigned int i;
 184         Client *c, *tc;
 185         Window trans;
 186         XSetWindowAttributes twa;
 187
 188         c = emallocz(sizeof(Client));
 189         c->tags = emallocz(ntags * sizeof(Bool));
 190         c->win = w;
 191         c->x = c->tx = wa->x;
 192         c->y = c->ty = wa->y;
 193         c->w = c->tw = wa->width;
 194         c->h = wa->height;
 195         c->th = bh;
 196
 197         c->border = 0;
 198         setsize(c);
 199
 200         if(c->x + c->w + 2 > sw)
 201                 c->x = sw - c->w - 2;
 202         if(c->x < 0)
 203                 c->x = 0;
 204         if(c->y + c->h + 2 > sh)
 205                 c->y = sh - c->h - 2;
 206         if(c->h != sh && c->y < bh)
 207                 c->y = bh;
 208
 209         c->proto = getproto(c->win);
 210         XSelectInput(dpy, c->win,
 211                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 212         XGetTransientForHint(dpy, c->win, &trans);
 213         twa.override_redirect = 1;
 214         twa.background_pixmap = ParentRelative;
 215         twa.event_mask = ExposureMask | EnterWindowMask;
 216
 217         c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
 218                         0, DefaultDepth(dpy, screen), CopyFromParent,
 219                         DefaultVisual(dpy, screen),
 220                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
 221
 222         if(clients)
 223                 clients->prev = c;
 224         c->next = clients;
 225         clients = c;
 226
 227         grabbutton(c, Button1, MODKEY);
 228         grabbutton(c, Button2, MODKEY);
 229         grabbutton(c, Button3, MODKEY);
 230
 231         if((tc = getclient(trans))) /* inherit tags */
 232                 for(i = 0; i < ntags; i++)
 233                         c->tags[i] = tc->tags[i];
 234         else
 235                 settags(c);
 236         if(!c->isfloat)
 237                 c->isfloat = trans
 238                         || (c->maxw && c->minw &&
 239                                 c->maxw == c->minw && c->maxh == c->minh);
 240         settitle(c);
 241         if(isvisible(c))
 242                 sel = c;
 243         arrange(NULL);
 244         XMapWindow(dpy, c->win);
 245         XMapWindow(dpy, c->title);
 246         if(isvisible(c))
 247                 focus(c);
 248 }
 249
 250 void
 251 resize(Client *c, Bool sizehints, Corner sticky)
 252 {
 253         int bottom = c->y + c->h;
 254         int right = c->x + c->w;
 255         XWindowChanges wc;
 256
 257         if(sizehints) {
 258                 if(c->incw)
 259                         c->w -= (c->w - c->basew) % c->incw;
 260                 if(c->inch)
 261                         c->h -= (c->h - c->baseh) % c->inch;
 262                 if(c->minw && c->w < c->minw)
 263                         c->w = c->minw;
 264                 if(c->minh && c->h < c->minh)
 265                         c->h = c->minh;
 266                 if(c->maxw && c->w > c->maxw)
 267                         c->w = c->maxw;
 268                 if(c->maxh && c->h > c->maxh)
 269                         c->h = c->maxh;
 270         }
 271         if(sticky == TopRight || sticky == BotRight)
 272                 c->x = right - c->w;
 273         if(sticky == BotLeft || sticky == BotRight)
 274                 c->y = bottom - c->h;
 275
 276         resizetitle(c);
 277         wc.x = c->x;
 278         wc.y = c->y;
 279         wc.width = c->w;
 280         wc.height = c->h;
 281         if(c->w == sw && c->h == sh)
 282                 wc.border_width = 0;
 283         else
 284                 wc.border_width = 1;
 285         XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
 286         XSync(dpy, False);
 287 }
 288
 289 void
 290 setsize(Client *c)
 291 {
 292         long msize;
 293         XSizeHints size;
 294
 295         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 296                 size.flags = PSize;
 297         c->flags = size.flags;
 298         if(c->flags & PBaseSize) {
 299                 c->basew = size.base_width;
 300                 c->baseh = size.base_height;
 301         }
 302         else
 303                 c->basew = c->baseh = 0;
 304         if(c->flags & PResizeInc) {
 305                 c->incw = size.width_inc;
 306                 c->inch = size.height_inc;
 307         }
 308         else
 309                 c->incw = c->inch = 0;
 310         if(c->flags & PMaxSize) {
 311                 c->maxw = size.max_width;
 312                 c->maxh = size.max_height;
 313         }
 314         else
 315                 c->maxw = c->maxh = 0;
 316         if(c->flags & PMinSize) {
 317                 c->minw = size.min_width;
 318                 c->minh = size.min_height;
 319         }
 320         else
 321                 c->minw = c->minh = 0;
 322         if(c->flags & PWinGravity)
 323                 c->grav = size.win_gravity;
 324         else
 325                 c->grav = NorthWestGravity;
 326 }
 327
 328 void
 329 settitle(Client *c)
 330 {
 331         char **list = NULL;
 332         int n;
 333         XTextProperty name;
 334
 335         name.nitems = 0;
 336         c->name[0] = 0;
 337         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 338         if(!name.nitems)
 339                 XGetWMName(dpy, c->win, &name);
 340         if(!name.nitems)
 341                 return;
 342         if(name.encoding == XA_STRING)
 343                 strncpy(c->name, (char *)name.value, sizeof(c->name));
 344         else {
 345                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 346                                 && n > 0 && *list)
 347                 {
 348                         strncpy(c->name, *list, sizeof(c->name));
 349                         XFreeStringList(list);
 350                 }
 351         }
 352         XFree(name.value);
 353         resizetitle(c);
 354 }
 355
 356 void
 357 togglemax(Arg *arg)
 358 {
 359         int ox, oy, ow, oh;
 360         XEvent ev;
 361
 362         if(!sel)
 363                 return;
 364
 365         if((sel->ismax = !sel->ismax)) {
 366                 ox = sel->x;
 367                 oy = sel->y;
 368                 ow = sel->w;
 369                 oh = sel->h;
 370                 sel->x = sx;
 371                 sel->y = sy + bh;
 372                 sel->w = sw - 2;
 373                 sel->h = sh - 2 - bh;
 374
 375                 restack();
 376                 resize(sel, arrange == dofloat, TopLeft);
 377
 378                 sel->x = ox;
 379                 sel->y = oy;
 380                 sel->w = ow;
 381                 sel->h = oh;
 382         }
 383         else
 384                 resize(sel, False, TopLeft);
 385         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 386 }
 387
 388 void
 389 unmanage(Client *c)
 390 {
 391         XGrabServer(dpy);
 392         XSetErrorHandler(xerrordummy);
 393
 394         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 395         XDestroyWindow(dpy, c->title);
 396
 397         if(c->prev)
 398                 c->prev->next = c->next;
 399         if(c->next)
 400                 c->next->prev = c->prev;
 401         if(c == clients)
 402                 clients = c->next;
 403         if(sel == c)
 404                 sel = getnext(clients);
 405         free(c->tags);
 406         free(c);
 407
 408         XSync(dpy, False);
 409         XSetErrorHandler(xerror);
 410         XUngrabServer(dpy);
 411         if(sel)
 412                 focus(sel);
 413         arrange(NULL);
 414 }