screen.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include "dwm.h"
   3 #include <regex.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <X11/Xatom.h>
   8 #include <X11/Xutil.h>
   9
  10 /* static */
  11
  12 typedef struct {
  13         const char *symbol;
  14         void (*arrange)(void);
  15 } Layout;
  16
  17 typedef struct {
  18         const char *prop;
  19         const char *tags;
  20         Bool isfloating;
  21 } Rule;
  22
  23 typedef struct {
  24         regex_t *propregex;
  25         regex_t *tagregex;
  26 } Regs;
  27
  28 TAGS
  29 RULES
  30
  31 static char prop[512];
  32 static unsigned int nrules = 0;
  33 static unsigned int nlayouts = 0;
  34 static unsigned int ltidx = 0; /* default */
  35 static Regs *regs = NULL;
  36
  37 static unsigned int
  38 idxoftag(const char *tag) {
  39         unsigned int i;
  40
  41         for(i = 0; i < ntags; i++)
  42                 if(tags[i] == tag)
  43                         return i;
  44         return 0;
  45 }
  46
  47 static void
  48 floating(void) { /* default floating layout */
  49         Client *c;
  50
  51         for(c = clients; c; c = c->next)
  52                 if(isvisible(c))
  53                         resize(c, c->x, c->y, c->w, c->h, True);
  54 }
  55
  56 static void
  57 setdwmprops(void) {
  58         unsigned int i;
  59
  60         for(i = 0; i < ntags && i < sizeof prop - 1; i++)
  61                 prop[i] = seltags[i] ? '1' : '0';
  62         if(i < sizeof prop - 1)
  63                 prop[i++] = (char)ltidx + '0';
  64         prop[i] = '\0';
  65         XChangeProperty(dpy, root, dwmprops, XA_STRING, 8,
  66                         PropModeReplace, (unsigned char *)prop, i);
  67 }
  68
  69 LAYOUTS
  70
  71 /* extern */
  72
  73 unsigned int blw = 0;
  74
  75 void
  76 applyrules(Client *c) {
  77         unsigned int i, j;
  78         regmatch_t tmp;
  79         Bool matched = False;
  80         XClassHint ch = { 0 };
  81
  82         /* rule matching */
  83         XGetClassHint(dpy, c->win, &ch);
  84         snprintf(prop, sizeof prop, "%s:%s:%s",
  85                         ch.res_class ? ch.res_class : "",
  86                         ch.res_name ? ch.res_name : "", c->name);
  87         for(i = 0; i < nrules; i++)
  88                 if(regs[i].propregex && !regexec(regs[i].propregex, prop, 1, &tmp, 0)) {
  89                         c->isfloating = rules[i].isfloating;
  90                         for(j = 0; regs[i].tagregex && j < ntags; j++) {
  91                                 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
  92                                         matched = True;
  93                                         c->tags[j] = True;
  94                                 }
  95                         }
  96                 }
  97         if(ch.res_class)
  98                 XFree(ch.res_class);
  99         if(ch.res_name)
 100                 XFree(ch.res_name);
 101         if(!matched)
 102                 for(i = 0; i < ntags; i++)
 103                         c->tags[i] = seltags[i];
 104 }
 105
 106 void
 107 arrange(void) {
 108         Client *c;
 109
 110         for(c = clients; c; c = c->next)
 111                 if(isvisible(c))
 112                         unban(c);
 113                 else
 114                         ban(c);
 115         layouts[ltidx].arrange();
 116         focus(NULL);
 117         restack();
 118 }
 119
 120 void
 121 compileregs(void) {
 122         unsigned int i;
 123         regex_t *reg;
 124
 125         if(regs)
 126                 return;
 127         nrules = sizeof rules / sizeof rules[0];
 128         regs = emallocz(nrules * sizeof(Regs));
 129         for(i = 0; i < nrules; i++) {
 130                 if(rules[i].prop) {
 131                         reg = emallocz(sizeof(regex_t));
 132                         if(regcomp(reg, rules[i].prop, REG_EXTENDED))
 133                                 free(reg);
 134                         else
 135                                 regs[i].propregex = reg;
 136                 }
 137                 if(rules[i].tags) {
 138                         reg = emallocz(sizeof(regex_t));
 139                         if(regcomp(reg, rules[i].tags, REG_EXTENDED))
 140                                 free(reg);
 141                         else
 142                                 regs[i].tagregex = reg;
 143                 }
 144         }
 145 }
 146
 147 void
 148 focusnext(const char *arg) {
 149         Client *c;
 150
 151         if(!sel)
 152                 return;
 153         for(c = sel->next; c && !isvisible(c); c = c->next);
 154         if(!c)
 155                 for(c = clients; c && !isvisible(c); c = c->next);
 156         if(c) {
 157                 focus(c);
 158                 restack();
 159         }
 160 }
 161
 162 void
 163 focusprev(const char *arg) {
 164         Client *c;
 165
 166         if(!sel)
 167                 return;
 168         for(c = sel->prev; c && !isvisible(c); c = c->prev);
 169         if(!c) {
 170                 for(c = clients; c && c->next; c = c->next);
 171                 for(; c && !isvisible(c); c = c->prev);
 172         }
 173         if(c) {
 174                 focus(c);
 175                 restack();
 176         }
 177 }
 178
 179 const char *
 180 getsymbol(void)
 181 {
 182         return layouts[ltidx].symbol;
 183 }
 184
 185 void
 186 initlayouts(void) {
 187         unsigned int i, w;
 188
 189         nlayouts = sizeof layouts / sizeof layouts[0];
 190         for(blw = i = 0; i < nlayouts; i++) {
 191                 w = textw(layouts[i].symbol);
 192                 if(w > blw)
 193                         blw = w;
 194         }
 195 }
 196
 197 Bool
 198 isfloating(void) {
 199         return layouts[ltidx].arrange == floating;
 200 }
 201
 202 Bool
 203 isarrange(void (*func)())
 204 {
 205         return func == layouts[ltidx].arrange;
 206 }
 207
 208 Bool
 209 isvisible(Client *c) {
 210         unsigned int i;
 211
 212         for(i = 0; i < ntags; i++)
 213                 if(c->tags[i] && seltags[i])
 214                         return True;
 215         return False;
 216 }
 217
 218 void
 219 getdwmprops(void) {
 220         unsigned int i;
 221
 222         if(gettextprop(root, dwmprops, prop, sizeof prop)) {
 223                 for(i = 0; i < ntags && i < sizeof prop - 1 && prop[i] != '\0'; i++)
 224                         seltags[i] = prop[i] == '1';
 225                 if(i < sizeof prop - 1 && prop[i] != '\0') {
 226                         if((unsigned int)(prop[i] - '0') < nlayouts)
 227                                 ltidx = prop[i] - '0';
 228                 }
 229         }
 230 }
 231
 232 Client *
 233 nexttiled(Client *c) {
 234         for(; c && (c->isfloating || !isvisible(c)); c = c->next);
 235         return c;
 236 }
 237
 238 void
 239 restack(void) {
 240         Client *c;
 241         XEvent ev;
 242         XWindowChanges wc;
 243
 244         drawstatus();
 245         if(!sel)
 246                 return;
 247         if(sel->isfloating || isfloating())
 248                 XRaiseWindow(dpy, sel->win);
 249         if(!isfloating()) {
 250                 wc.stack_mode = Below;
 251                 wc.sibling = barwin;
 252                 if(!sel->isfloating) {
 253                         XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
 254                         wc.sibling = sel->win;
 255                 }
 256                 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
 257                         if(c == sel)
 258                                 continue;
 259                         XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
 260                         wc.sibling = c->win;
 261                 }
 262         }
 263         XSync(dpy, False);
 264         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 265 }
 266
 267 void
 268 setlayout(const char *arg) {
 269         int i;
 270
 271         if(!arg) {
 272                 if(++ltidx == nlayouts)
 273                         ltidx = 0;;
 274         }
 275         else {
 276                 i = atoi(arg);
 277                 if(i < 0 || i >= nlayouts)
 278                         return;
 279                 ltidx = i;
 280         }
 281         if(sel)
 282                 arrange();
 283         else
 284                 drawstatus();
 285         setdwmprops();
 286 }
 287
 288 void
 289 tag(const char *arg) {
 290         unsigned int i;
 291
 292         if(!sel)
 293                 return;
 294         for(i = 0; i < ntags; i++)
 295                 sel->tags[i] = arg == NULL;
 296         i = idxoftag(arg);
 297         if(i >= 0 && i < ntags)
 298                 sel->tags[i] = True;
 299         setprops(sel);
 300         arrange();
 301 }
 302
 303 void
 304 togglebar(const char *arg) {
 305         if(bpos == BarOff)
 306                 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
 307         else
 308                 bpos = BarOff;
 309         updatebarpos();
 310         arrange();
 311 }
 312
 313 void
 314 togglefloating(const char *arg) {
 315         if(!sel || isfloating())
 316                 return;
 317         sel->isfloating = !sel->isfloating;
 318         if(sel->isfloating) {
 319                 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
 320                 setprops(sel);
 321         }
 322         arrange();
 323 }
 324
 325 void
 326 togglemax(const char *arg) {
 327         XEvent ev;
 328
 329         if(!sel || (!isfloating() && !sel->isfloating) || sel->isfixed)
 330                 return;
 331         if((sel->ismax = !sel->ismax)) {
 332                 sel->rx = sel->x;
 333                 sel->ry = sel->y;
 334                 sel->rw = sel->w;
 335                 sel->rh = sel->h;
 336                 resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
 337         }
 338         else
 339                 resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
 340         drawstatus();
 341         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 342 }
 343
 344 void
 345 toggletag(const char *arg) {
 346         unsigned int i, j;
 347
 348         if(!sel)
 349                 return;
 350         i = idxoftag(arg);
 351         sel->tags[i] = !sel->tags[i];
 352         for(j = 0; j < ntags && !sel->tags[j]; j++);
 353         if(j == ntags)
 354                 sel->tags[i] = True;
 355         setprops(sel);
 356         arrange();
 357 }
 358
 359 void
 360 toggleview(const char *arg) {
 361         unsigned int i, j;
 362
 363         i = idxoftag(arg);
 364         seltags[i] = !seltags[i];
 365         for(j = 0; j < ntags && !seltags[j]; j++);
 366         if(j == ntags)
 367                 seltags[i] = True; /* cannot toggle last view */
 368         setdwmprops();
 369         arrange();
 370 }
 371
 372 void
 373 updatebarpos(void) {
 374         XEvent ev;
 375
 376         wax = sx;
 377         way = sy;
 378         wah = sh;
 379         waw = sw;
 380         switch(bpos) {
 381         default:
 382                 wah -= bh;
 383                 way += bh;
 384                 XMoveWindow(dpy, barwin, sx, sy);
 385                 break;
 386         case BarBot:
 387                 wah -= bh;
 388                 XMoveWindow(dpy, barwin, sx, sy + wah);
 389                 break;
 390         case BarOff:
 391                 XMoveWindow(dpy, barwin, sx, sy - bh);
 392                 break;
 393         }
 394         XSync(dpy, False);
 395         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 396 }
 397
 398 void
 399 view(const char *arg) {
 400         unsigned int i;
 401
 402         for(i = 0; i < ntags; i++)
 403                 seltags[i] = arg == NULL;
 404         i = idxoftag(arg);
 405         if(i >= 0 && i < ntags)
 406                 seltags[i] = True;
 407         setdwmprops();
 408         arrange();
 409 }