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 max(void *aux)
  16 {
  17         if(!stack)
  18                 return;
  19         stack->x = sx;
  20         stack->y = bh;
  21         stack->w = sw - 2;
  22         stack->h = sh - bh - 2;
  23         resize(stack);
  24 }
  25
  26 void
  27 arrange(void *aux)
  28 {
  29         Client *c;
  30         int n, cols, rows, gw, gh, i, j;
  31     float rt, fd;
  32
  33         if(!clients)
  34                 return;
  35         for(n = 0, c = clients; c; c = c->next, n++);
  36         rt = sqrt(n);
  37         if(modff(rt, &fd) < 0.5)
  38                 rows = floor(rt);
  39         else
  40                 rows = ceil(rt);
  41         if(rows * rows < n)
  42                 cols = rows + 1;
  43         else
  44                 cols = rows;
  45
  46         gw = (sw - 1)  / cols;
  47         gh = (sh - bh - 1) / rows;
  48
  49         for(i = j = 0, c = clients; c; c = c->next) {
  50                 c->x = i * gw;
  51                 c->y = j * gh + bh;
  52                 c->w = gw;
  53                 c->h = gh;
  54                 resize(c);
  55                 if(++i == cols) {
  56                         j++;
  57                         i = 0;
  58                 }
  59         }
  60 }
  61
  62 void
  63 sel(void *aux)
  64 {
  65         const char *arg = aux;
  66         Client *c = NULL;
  67
  68         if(!arg || !stack)
  69                 return;
  70         if(!strncmp(arg, "next", 5))
  71                 c = stack->snext ? stack->snext : stack;
  72         else if(!strncmp(arg, "prev", 5))
  73                 for(c = stack; c && c->snext; c = c->snext);
  74         if(!c)
  75                 c = stack;
  76         raise(c);
  77         focus(c);
  78 }
  79
  80 void
  81 kill(void *aux)
  82 {
  83         Client *c = stack;
  84
  85         if(!c)
  86                 return;
  87         if(c->proto & WM_PROTOCOL_DELWIN)
  88                 send_message(c->win, wm_atom[WMProtocols], wm_atom[WMDelete]);
  89         else
  90                 XKillClient(dpy, c->win);
  91 }
  92
  93 static void
  94 resize_title(Client *c)
  95 {
  96         c->tw = textw(&brush.font, c->name) + bh;
  97         if(c->tw > c->w)
  98                 c->tw = c->w + 2;
  99         c->tx = c->x + c->w - c->tw + 2;
 100         c->ty = c->y;
 101         XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
 102 }
 103
 104 void
 105 update_name(Client *c)
 106 {
 107         XTextProperty name;
 108         int n;
 109         char **list = NULL;
 110
 111         name.nitems = 0;
 112         c->name[0] = 0;
 113         XGetTextProperty(dpy, c->win, &name, net_atom[NetWMName]);
 114         if(!name.nitems)
 115                 XGetWMName(dpy, c->win, &name);
 116         if(!name.nitems)
 117                 return;
 118         if(name.encoding == XA_STRING)
 119                 strncpy(c->name, (char *)name.value, sizeof(c->name));
 120         else {
 121                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 122                                 && n > 0 && *list)
 123                 {
 124                         strncpy(c->name, *list, sizeof(c->name));
 125                         XFreeStringList(list);
 126                 }
 127         }
 128         XFree(name.value);
 129         resize_title(c);
 130 }
 131
 132 void
 133 update_size(Client *c)
 134 {
 135         XSizeHints size;
 136         long msize;
 137         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 138                 size.flags = PSize;
 139         c->flags = size.flags;
 140         if(c->flags & PBaseSize) {
 141                 c->basew = size.base_width;
 142                 c->baseh = size.base_height;
 143         }
 144         else
 145                 c->basew = c->baseh = 0;
 146         if(c->flags & PResizeInc) {
 147                 c->incw = size.width_inc;
 148                 c->inch = size.height_inc;
 149         }
 150         else
 151                 c->incw = c->inch = 0;
 152         if(c->flags & PMaxSize) {
 153                 c->maxw = size.max_width;
 154                 c->maxh = size.max_height;
 155         }
 156         else
 157                 c->maxw = c->maxh = 0;
 158         if(c->flags & PMinSize) {
 159                 c->minw = size.min_width;
 160                 c->minh = size.min_height;
 161         }
 162         else
 163                 c->minw = c->minh = 0;
 164 }
 165
 166 void
 167 raise(Client *c)
 168 {
 169         XRaiseWindow(dpy, c->win);
 170         XRaiseWindow(dpy, c->title);
 171 }
 172
 173 void
 174 lower(Client *c)
 175 {
 176         XLowerWindow(dpy, c->title);
 177         XLowerWindow(dpy, c->win);
 178 }
 179
 180 void
 181 focus(Client *c)
 182 {
 183         Client **l, *old;
 184
 185         old = stack;
 186         for(l = &stack; *l && *l != c; l = &(*l)->snext);
 187         eassert(*l == c);
 188         *l = c->snext;
 189         c->snext = stack;
 190         stack = c;
 191         if(old && old != c) {
 192                 XMapWindow(dpy, old->title);
 193                 draw_client(old);
 194         }
 195         XUnmapWindow(dpy, c->title);
 196         draw_client(c);
 197         XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 198         XFlush(dpy);
 199 }
 200
 201 void
 202 manage(Window w, XWindowAttributes *wa)
 203 {
 204         Client *c, **l;
 205         XSetWindowAttributes twa;
 206
 207         c = emallocz(sizeof(Client));
 208         c->win = w;
 209         c->tx = c->x = wa->x;
 210         c->ty = c->y = wa->y;
 211         if(c->y < bh)
 212                 c->ty = c->y += bh;
 213         c->tw = c->w = wa->width;
 214         c->h = wa->height;
 215         c->th = bh;
 216         update_size(c);
 217         XSetWindowBorderWidth(dpy, c->win, 1);
 218         XSetWindowBorder(dpy, c->win, brush.border);
 219         XSelectInput(dpy, c->win,
 220                         StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 221         XGetTransientForHint(dpy, c->win, &c->trans);
 222         twa.override_redirect = 1;
 223         twa.background_pixmap = ParentRelative;
 224         twa.event_mask = ExposureMask;
 225
 226         c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
 227                         0, DefaultDepth(dpy, screen), CopyFromParent,
 228                         DefaultVisual(dpy, screen),
 229                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
 230         update_name(c);
 231
 232         for(l=&clients; *l; l=&(*l)->next);
 233         c->next = *l; /* *l == nil */
 234         *l = c;
 235         c->snext = stack;
 236         stack = c;
 237         XMapRaised(dpy, c->win);
 238         XMapRaised(dpy, c->title);
 239         XGrabButton(dpy, Button1, Mod1Mask, c->win, False, ButtonPressMask,
 240                         GrabModeAsync, GrabModeSync, None, None);
 241         XGrabButton(dpy, Button2, Mod1Mask, c->win, False, ButtonPressMask,
 242                         GrabModeAsync, GrabModeSync, None, None);
 243         XGrabButton(dpy, Button3, Mod1Mask, c->win, False, ButtonPressMask,
 244                         GrabModeAsync, GrabModeSync, None, None);
 245         resize(c);
 246         focus(c);
 247 }
 248
 249 void
 250 resize(Client *c)
 251 {
 252         XConfigureEvent e;
 253
 254         resize_title(c);
 255         XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 256         e.type = ConfigureNotify;
 257         e.event = c->win;
 258         e.window = c->win;
 259         e.x = c->x;
 260         e.y = c->y;
 261         e.width = c->w;
 262         e.height = c->h;
 263         e.border_width = 0;
 264         e.above = None;
 265         e.override_redirect = False;
 266         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&e);
 267         XFlush(dpy);
 268 }
 269
 270 static int
 271 dummy_error_handler(Display *dpy, XErrorEvent *error)
 272 {
 273         return 0;
 274 }
 275
 276 void
 277 unmanage(Client *c)
 278 {
 279         Client **l;
 280
 281         XGrabServer(dpy);
 282         XSetErrorHandler(dummy_error_handler);
 283
 284         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 285         XDestroyWindow(dpy, c->title);
 286
 287         for(l=&clients; *l && *l != c; l=&(*l)->next);
 288         eassert(*l == c);
 289         *l = c->next;
 290         for(l=&stack; *l && *l != c; l=&(*l)->snext);
 291         eassert(*l == c);
 292         *l = c->snext;
 293         free(c);
 294
 295         XFlush(dpy);
 296         XSetErrorHandler(error_handler);
 297         XUngrabServer(dpy);
 298         if(stack)
 299                 focus(stack);
 300 }
 301
 302 Client *
 303 gettitle(Window w)
 304 {
 305         Client *c;
 306         for(c = clients; c; c = c->next)
 307                 if(c->title == w)
 308                         return c;
 309         return NULL;
 310 }
 311
 312 Client *
 313 getclient(Window w)
 314 {
 315         Client *c;
 316         for(c = clients; c; c = c->next)
 317                 if(c->win == w)
 318                         return c;
 319         return NULL;
 320 }
 321
 322 void
 323 draw_client(Client *c)
 324 {
 325         if(c == stack) {
 326                 draw_bar();
 327                 return;
 328         }
 329
 330         brush.x = brush.y = 0;
 331         brush.w = c->tw;
 332         brush.h = c->th;
 333
 334         draw(dpy, &brush, True, c->name);
 335         XCopyArea(dpy, brush.drawable, c->title, brush.gc,
 336                         0, 0, c->tw, c->th, 0, 0);
 337         XFlush(dpy);
 338 }