client.c

   1 /*
   2  * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
   3  * See LICENSE file for license details.
   4  */
   5
   6 #include <math.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <X11/Xatom.h>
  10
  11 #include "util.h"
  12 #include "wm.h"
  13
  14 void
  15 arrange(void *aux)
  16 {
  17         Client *c;
  18         int n, cols, rows, gw, gh, i, j;
  19     float rt, fd;
  20
  21         if(!clients)
  22                 return;
  23         for(n = 0, c = clients; c; c = c->next, n++);
  24         rt = sqrt(n);
  25         if(modff(rt, &fd) < 0.5)
  26                 rows = floor(rt);
  27         else
  28                 rows = ceil(rt);
  29         if(rows * rows < n)
  30                 cols = rows + 1;
  31         else
  32                 cols = rows;
  33
  34         gw = (sw - 1)  / cols;
  35         gh = (sh - bh - 1) / rows;
  36
  37         for(i = j = 0, c = clients; c; c = c->next) {
  38                 c->x = i * gw;
  39                 c->y = j * gh + bh;
  40                 c->w = gw;
  41                 c->h = gh;
  42                 resize(c);
  43                 if(++i == cols) {
  44                         j++;
  45                         i = 0;
  46                 }
  47         }
  48 }
  49
  50 void
  51 sel(void *aux)
  52 {
  53         const char *arg = aux;
  54         Client *c = NULL;
  55
  56         if(!arg || !stack)
  57                 return;
  58         if(!strncmp(arg, "next", 5))
  59                 c = stack->snext ? stack->snext : stack;
  60         else if(!strncmp(arg, "prev", 5))
  61                 for(c = stack; c && c->snext; c = c->snext);
  62         if(!c)
  63                 c = stack;
  64         raise(c);
  65         focus(c);
  66 }
  67
  68 void
  69 kill(void *aux)
  70 {
  71         Client *c = stack;
  72
  73         if(!c)
  74                 return;
  75         if(c->proto & WM_PROTOCOL_DELWIN)
  76                 send_message(c->win, wm_atom[WMProtocols], wm_atom[WMDelete]);
  77         else
  78                 XKillClient(dpy, c->win);
  79 }
  80
  81 static void
  82 resize_title(Client *c)
  83 {
  84         c->tw = textw(&brush.font, c->name) + bh;
  85         if(c->tw > c->w)
  86                 c->tw = c->w + 2;
  87         c->tx = c->x + c->w - c->tw + 2;
  88         c->ty = c->y;
  89         XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
  90 }
  91
  92 void
  93 update_name(Client *c)
  94 {
  95         XTextProperty name;
  96         int n;
  97         char **list = NULL;
  98
  99         name.nitems = 0;
 100         c->name[0] = 0;
 101         XGetTextProperty(dpy, c->win, &name, net_atom[NetWMName]);
 102         if(!name.nitems)
 103                 XGetWMName(dpy, c->win, &name);
 104         if(!name.nitems)
 105                 return;
 106         if(name.encoding == XA_STRING)
 107                 strncpy(c->name, (char *)name.value, sizeof(c->name));
 108         else {
 109                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 110                                 && n > 0 && *list)
 111                 {
 112                         strncpy(c->name, *list, sizeof(c->name));
 113                         XFreeStringList(list);
 114                 }
 115         }
 116         XFree(name.value);
 117         resize_title(c);
 118 }
 119
 120 void
 121 update_size(Client *c)
 122 {
 123         XSizeHints size;
 124         long msize;
 125         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 126                 size.flags = PSize;
 127         c->flags = size.flags;
 128         if(c->flags & PBaseSize) {
 129                 c->basew = size.base_width;
 130                 c->baseh = size.base_height;
 131         }
 132         else
 133                 c->basew = c->baseh = 0;
 134         if(c->flags & PResizeInc) {
 135                 c->incw = size.width_inc;
 136                 c->inch = size.height_inc;
 137         }
 138         else
 139                 c->incw = c->inch = 0;
 140         if(c->flags & PMaxSize) {
 141                 c->maxw = size.max_width;
 142                 c->maxh = size.max_height;
 143         }
 144         else
 145                 c->maxw = c->maxh = 0;
 146         if(c->flags & PMinSize) {
 147                 c->minw = size.min_width;
 148                 c->minh = size.min_height;
 149         }
 150         else
 151                 c->minw = c->minh = 0;
 152 }
 153
 154 void
 155 raise(Client *c)
 156 {
 157         XRaiseWindow(dpy, c->win);
 158         XRaiseWindow(dpy, c->title);
 159 }
 160
 161 void
 162 lower(Client *c)
 163 {
 164         XLowerWindow(dpy, c->title);
 165         XLowerWindow(dpy, c->win);
 166 }
 167
 168 void
 169 focus(Client *c)
 170 {
 171         Client **l, *old;
 172
 173         old = stack;
 174         for(l = &stack; *l && *l != c; l = &(*l)->snext);
 175         eassert(*l == c);
 176         *l = c->snext;
 177         c->snext = stack;
 178         stack = c;
 179         if(old && old != c) {
 180                 XMapWindow(dpy, old->title);
 181                 draw_client(old);
 182         }
 183         XUnmapWindow(dpy, c->title);
 184         draw_client(c);
 185         XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 186         XFlush(dpy);
 187 }
 188
 189 void
 190 manage(Window w, XWindowAttributes *wa)
 191 {
 192         Client *c, **l;
 193         XSetWindowAttributes twa;
 194
 195         c = emallocz(sizeof(Client));
 196         c->win = w;
 197         c->tx = c->x = wa->x;
 198         c->ty = c->y = wa->y;
 199         if(c->y < bh)
 200                 c->ty = c->y += bh;
 201         c->tw = c->w = wa->width;
 202         c->h = wa->height;
 203         c->th = bh;
 204         update_size(c);
 205         XSetWindowBorderWidth(dpy, c->win, 1);
 206         XSetWindowBorder(dpy, c->win, brush.border);
 207         XSelectInput(dpy, c->win,
 208                         StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 209         XGetTransientForHint(dpy, c->win, &c->trans);
 210         twa.override_redirect = 1;
 211         twa.background_pixmap = ParentRelative;
 212         twa.event_mask = ExposureMask;
 213
 214         c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
 215                         0, DefaultDepth(dpy, screen), CopyFromParent,
 216                         DefaultVisual(dpy, screen),
 217                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
 218         update_name(c);
 219
 220         for(l=&clients; *l; l=&(*l)->next);
 221         c->next = *l; /* *l == nil */
 222         *l = c;
 223         c->snext = stack;
 224         stack = c;
 225         XMapRaised(dpy, c->win);
 226         XMapRaised(dpy, c->title);
 227         XGrabButton(dpy, Button1, Mod1Mask, c->win, False, ButtonPressMask,
 228                         GrabModeAsync, GrabModeSync, None, None);
 229         XGrabButton(dpy, Button2, Mod1Mask, c->win, False, ButtonPressMask,
 230                         GrabModeAsync, GrabModeSync, None, None);
 231         XGrabButton(dpy, Button3, Mod1Mask, c->win, False, ButtonPressMask,
 232                         GrabModeAsync, GrabModeSync, None, None);
 233         resize(c);
 234         focus(c);
 235 }
 236
 237 void
 238 resize(Client *c)
 239 {
 240         XConfigureEvent e;
 241
 242         resize_title(c);
 243         XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 244         e.type = ConfigureNotify;
 245         e.event = c->win;
 246         e.window = c->win;
 247         e.x = c->x;
 248         e.y = c->y;
 249         e.width = c->w;
 250         e.height = c->h;
 251         e.border_width = 0;
 252         e.above = None;
 253         e.override_redirect = False;
 254         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&e);
 255         XFlush(dpy);
 256 }
 257
 258 static int
 259 dummy_error_handler(Display *dpy, XErrorEvent *error)
 260 {
 261         return 0;
 262 }
 263
 264 void
 265 unmanage(Client *c)
 266 {
 267         Client **l;
 268
 269         XGrabServer(dpy);
 270         XSetErrorHandler(dummy_error_handler);
 271
 272         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 273         XDestroyWindow(dpy, c->title);
 274
 275         for(l=&clients; *l && *l != c; l=&(*l)->next);
 276         eassert(*l == c);
 277         *l = c->next;
 278         for(l=&stack; *l && *l != c; l=&(*l)->snext);
 279         eassert(*l == c);
 280         *l = c->snext;
 281         free(c);
 282
 283         XFlush(dpy);
 284         XSetErrorHandler(error_handler);
 285         XUngrabServer(dpy);
 286         if(stack)
 287                 focus(stack);
 288 }
 289
 290 Client *
 291 gettitle(Window w)
 292 {
 293         Client *c;
 294         for(c = clients; c; c = c->next)
 295                 if(c->title == w)
 296                         return c;
 297         return NULL;
 298 }
 299
 300 Client *
 301 getclient(Window w)
 302 {
 303         Client *c;
 304         for(c = clients; c; c = c->next)
 305                 if(c->win == w)
 306                         return c;
 307         return NULL;
 308 }
 309
 310 void
 311 draw_client(Client *c)
 312 {
 313         if(c == stack) {
 314                 draw_bar();
 315                 return;
 316         }
 317
 318         brush.x = brush.y = 0;
 319         brush.w = c->tw;
 320         brush.h = c->th;
 321
 322         draw(dpy, &brush, True, c->name);
 323         XCopyArea(dpy, brush.drawable, c->title, brush.gc,
 324                         0, 0, c->tw, c->th, 0, 0);
 325         XFlush(dpy);
 326 }