layout.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include "dwm.h"
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5
   6 unsigned int blw = 0;
   7 Layout *lt = NULL;
   8
   9 /* static */
  10
  11 static double hratio = HRATIO;
  12 static double vratio = VRATIO;
  13 static unsigned int nlayouts = 0;
  14 static unsigned int nmaster = NMASTER;
  15
  16 static double /* simple pow() */
  17 spow(double x, double y)
  18 {
  19         if(y == 0)
  20                 return 1;
  21         while(--y)
  22                 x *= x;
  23         return x;
  24 }
  25
  26 static void
  27 tile(void) {
  28         Bool mmaxtile = False, smaxtile = False; /* fallback tiling */
  29         double mscale = 0, sscale = 0, sum = 0;
  30         unsigned int i, n, nx, ny, nw, nh, mw, tw;
  31         Client *c;
  32
  33         /* preparation */
  34         for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
  35                 n++;
  36         nx = wax;
  37         ny = way;
  38         mw = (n <= nmaster) ? waw :  waw / (1 + hratio);
  39         tw = waw - mw;
  40         if(n > 0) {
  41                 if(n <= nmaster) {
  42                         for(i = 0; i < n; i++)
  43                                 sum += spow(vratio, i);
  44                         mscale = wah / sum;
  45                         if(vratio >= 1)
  46                                 mmaxtile = bh > mscale;
  47                         else
  48                                 mmaxtile = bh > (mscale * spow(vratio, n - 1));
  49                 }
  50                 else {
  51                         for(i = 0; i < nmaster; i++)
  52                                 sum += spow(vratio, i);
  53                         mscale = wah / sum;
  54                         for(sum = 0, i = 0; i < (n - nmaster); i++)
  55                                 sum += spow(vratio, i);
  56                         sscale = wah / sum;
  57                         if(vratio >= 1) {
  58                                 mmaxtile = bh > mscale;
  59                                 smaxtile = bh > sscale;
  60                         }
  61                         else {
  62                                 mmaxtile = bh > (mscale * spow(vratio, nmaster - 1));
  63                                 smaxtile = bh > (sscale * spow(vratio, n - nmaster - 1));
  64                         }
  65                 }
  66         }
  67         /* tiling */
  68         for(i = 0, c = clients; c; c = c->next)
  69                 if(isvisible(c)) {
  70                         unban(c);
  71                         if(c->isfloating)
  72                                 continue;
  73                         c->ismax = False;
  74                         if(i < nmaster) { /* master window */
  75                                 nw = mw - 2 * c->border;
  76                                 if(mmaxtile) {
  77                                         ny = way;
  78                                         nh = wah - 2 * c->border;
  79                                 }
  80                                 else if(i + 1 == (n < nmaster ? n : nmaster))
  81                                         nh = (way + wah) - ny - 2 * c->border;
  82                                 else
  83                                         nh = (mscale * spow(vratio, i)) - 2 * c->border;
  84                         }
  85                         else { /* tile window */
  86                                 nw = tw - 2 * c->border;
  87                                 if(i == nmaster) {
  88                                         ny = way;
  89                                         nx = wax + mw;
  90                                 }
  91                                 if(smaxtile) {
  92                                         ny = way;
  93                                         nh = wah - 2 * c->border;
  94                                 }
  95                                 else if(i + 1 == n)
  96                                         nh = (way + wah) - ny - 2 * c->border;
  97                                 else
  98                                         nh = (sscale * spow(vratio, i - nmaster)) - 2 * c->border;
  99                         }
 100                         resize(c, nx, ny, nw, nh, False);
 101                         ny += nh;
 102                         i++;
 103                 }
 104                 else
 105                         ban(c);
 106         focus(NULL);
 107         restack();
 108 }
 109
 110 LAYOUTS
 111
 112 static void
 113 incratio(const char *arg, double *ratio, double def) {
 114         double delta;
 115
 116         if(lt->arrange != tile)
 117                 return;
 118         if(!arg)
 119                 *ratio = def;
 120         else {
 121                 if(1 == sscanf(arg, "%lf", &delta)) {
 122                         if(delta + (*ratio) < .1 || delta + (*ratio) > 1.9)
 123                                 return;
 124                         *ratio += delta;
 125                 }
 126         }
 127         lt->arrange();
 128 }
 129
 130 /* extern */
 131
 132 void
 133 floating(void) {
 134         Client *c;
 135
 136         for(c = clients; c; c = c->next)
 137                 if(isvisible(c)) {
 138                         unban(c);
 139                         resize(c, c->x, c->y, c->w, c->h, True);
 140                 }
 141                 else
 142                         ban(c);
 143         focus(NULL);
 144         restack();
 145 }
 146
 147 void
 148 focusclient(const char *arg) {
 149         Client *c;
 150
 151         if(!sel || !arg)
 152                 return;
 153         if(atoi(arg) < 0) {
 154                 for(c = sel->prev; c && !isvisible(c); c = c->prev);
 155                 if(!c) {
 156                         for(c = clients; c && c->next; c = c->next);
 157                         for(; c && !isvisible(c); c = c->prev);
 158                 }
 159         }
 160         else {
 161                 for(c = sel->next; c && !isvisible(c); c = c->next);
 162                 if(!c)
 163                         for(c = clients; c && !isvisible(c); c = c->next);
 164         }
 165         if(c) {
 166                 focus(c);
 167                 restack();
 168         }
 169 }
 170
 171 void
 172 inchratio(const char *arg) {
 173         incratio(arg, &hratio, HRATIO);
 174 }
 175
 176 void
 177 incvratio(const char *arg) {
 178         incratio(arg, &vratio, VRATIO);
 179 }
 180
 181 void
 182 incnmaster(const char *arg) {
 183         int i;
 184
 185         if(!arg)
 186                 nmaster = NMASTER;
 187         else {
 188                 i = atoi(arg);
 189                 if((lt->arrange != tile) || (nmaster + i < 1)
 190                 || (wah / (nmaster + i) <= 2 * BORDERPX))
 191                         return;
 192                 nmaster += i;
 193         }
 194         if(sel)
 195                 lt->arrange();
 196         else
 197                 drawstatus();
 198 }
 199
 200 void
 201 initlayouts(void) {
 202         unsigned int i, w;
 203
 204         lt = &layout[0];
 205         nlayouts = sizeof layout / sizeof layout[0];
 206         for(blw = i = 0; i < nlayouts; i++) {
 207                 w = textw(layout[i].symbol);
 208                 if(w > blw)
 209                         blw = w;
 210         }
 211 }
 212
 213 Client *
 214 nexttiled(Client *c) {
 215         for(; c && (c->isfloating || !isvisible(c)); c = c->next);
 216         return c;
 217 }
 218
 219 void
 220 restack(void) {
 221         Client *c;
 222         XEvent ev;
 223         XWindowChanges wc;
 224
 225         drawstatus();
 226         if(!sel)
 227                 return;
 228         if(sel->isfloating || lt->arrange == floating)
 229                 XRaiseWindow(dpy, sel->win);
 230         if(lt->arrange != floating) {
 231                 wc.stack_mode = Below;
 232                 wc.sibling = barwin;
 233                 if(!sel->isfloating) {
 234                         XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
 235                         wc.sibling = sel->win;
 236                 }
 237                 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
 238                         if(c == sel)
 239                                 continue;
 240                         XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
 241                         wc.sibling = c->win;
 242                 }
 243         }
 244         XSync(dpy, False);
 245         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 246 }
 247
 248 void
 249 setlayout(const char *arg) {
 250         int i;
 251
 252         if(!arg) {
 253                 lt++;
 254                 if(lt == layout + nlayouts)
 255                         lt = layout;
 256         }
 257         else {
 258                 i = atoi(arg);
 259                 if(i < 0 || i >= nlayouts)
 260                         return;
 261                 lt = &layout[i];
 262         }
 263         if(sel)
 264                 lt->arrange();
 265         else
 266                 drawstatus();
 267 }
 268
 269 void
 270 togglebar(const char *arg) {
 271         if(bpos == BarOff)
 272                 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
 273         else
 274                 bpos = BarOff;
 275         updatebarpos();
 276         lt->arrange();
 277 }
 278
 279 void
 280 togglemax(const char *arg) {
 281         XEvent ev;
 282
 283         if(!sel || (lt->arrange != floating && !sel->isfloating) || sel->isfixed)
 284                 return;
 285         if((sel->ismax = !sel->ismax)) {
 286                 sel->rx = sel->x;
 287                 sel->ry = sel->y;
 288                 sel->rw = sel->w;
 289                 sel->rh = sel->h;
 290                 resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
 291         }
 292         else
 293                 resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
 294         drawstatus();
 295         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 296 }
 297
 298 void
 299 zoom(const char *arg) {
 300         Client *c;
 301
 302         if(!sel || lt->arrange == floating || sel->isfloating)
 303                 return;
 304         if((c = sel) == nexttiled(clients))
 305                 if(!(c = nexttiled(c->next)))
 306                         return;
 307         detach(c);
 308         attach(c);
 309         focus(c);
 310         lt->arrange();
 311 }