Pileus Git - wmpus/blob - sys-x11.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <search.h>
   4
   5 #include <X11/Xlib.h>
   6 #include <X11/Xproto.h>
   7 #include <X11/Xatom.h>
   8 #include <X11/keysym.h>
   9 #include <X11/extensions/Xinerama.h>
  10
  11 #include "util.h"
  12 #include "sys.h"
  13 #include "wm.h"
  14
  15 #define BORDER 2
  16
  17 /* Internal structures */
  18 struct win_sys {
  19         Window   xid;
  20         Display *dpy;
  21         struct {
  22                 int left, right, top, bottom;
  23         } strut;
  24 };
  25
  26 typedef struct {
  27         Key_t key;
  28         int   sym;
  29 } keymap_t;
  30
  31 typedef enum {
  32         wm_proto, wm_focus, net_strut, natoms
  33 } atom_t;
  34
  35 typedef enum {
  36         clr_focus, clr_unfocus, clr_urgent, ncolors
  37 } color_t;
  38
  39 /* Global data */
  40 static void *win_cache;
  41 static Atom atoms[natoms];
  42 static int (*xerrorxlib)(Display *, XErrorEvent *);
  43 static unsigned long colors[ncolors];
  44
  45 /* Conversion functions */
  46 static keymap_t key2sym[] = {
  47         {key_left    , XK_Left },
  48         {key_right   , XK_Right},
  49         {key_up      , XK_Up   },
  50         {key_down    , XK_Down },
  51         {key_home    , XK_Home },
  52         {key_end     , XK_End  },
  53         {key_pageup  , XK_Prior},
  54         {key_pagedown, XK_Next },
  55         {key_f1      , XK_F1   },
  56         {key_f2      , XK_F2   },
  57         {key_f3      , XK_F3   },
  58         {key_f4      , XK_F4   },
  59         {key_f5      , XK_F5   },
  60         {key_f6      , XK_F6   },
  61         {key_f7      , XK_F7   },
  62         {key_f8      , XK_F8   },
  63         {key_f9      , XK_F9   },
  64         {key_f10     , XK_F10  },
  65         {key_f11     , XK_F11  },
  66         {key_f12     , XK_F12  },
  67 };
  68
  69 /* - Modifiers */
  70 static mod_t x2mod(unsigned int state, int up)
  71 {
  72         return (mod_t){
  73                .alt   = !!(state & Mod1Mask   ),
  74                .ctrl  = !!(state & ControlMask),
  75                .shift = !!(state & ShiftMask  ),
  76                .win   = !!(state & Mod4Mask   ),
  77                .up    = up,
  78         };
  79 }
  80
  81 static unsigned int mod2x(mod_t mod)
  82 {
  83         return (mod.alt   ? Mod1Mask    : 0)
  84              | (mod.ctrl  ? ControlMask : 0)
  85              | (mod.shift ? ShiftMask   : 0)
  86              | (mod.win   ? Mod4Mask    : 0);
  87 }
  88
  89 /* - Keycodes */
  90 static Key_t x2key(KeySym sym)
  91 {
  92         keymap_t *km = map_getr(key2sym,sym);
  93         return km ? km->key : sym;
  94 }
  95
  96 static KeySym key2x(Key_t key)
  97 {
  98         keymap_t *km = map_get(key2sym,key);
  99         return km ? km->sym : key;
 100 }
 101
 102 static Key_t x2btn(int btn)
 103 {
 104         return btn + key_mouse0;
 105 }
 106
 107 static int btn2x(Key_t key)
 108 {
 109         return key - key_mouse0;
 110 }
 111
 112 /* - Pointers */
 113 static ptr_t x2ptr(XEvent *_ev)
 114 {
 115         XKeyEvent *ev = &_ev->xkey;
 116         return (ptr_t){ev->x, ev->y, ev->x_root, ev->y_root};
 117 }
 118
 119 static Window getfocus(win_t *root, XEvent *event)
 120 {
 121         int revert;
 122         Window focus = PointerRoot;
 123         if (event->type == KeyPress || event->type == KeyRelease)
 124                 XGetInputFocus(root->sys->dpy, &focus, &revert);
 125         if (focus == PointerRoot)
 126                 focus = event->xkey.subwindow;
 127         if (focus == None)
 128                 focus = event->xkey.window;
 129         return focus;
 130 }
 131
 132 /* Helpers */
 133 static int add_strut(win_t *root, win_t *win)
 134 {
 135         /* Get X11 strut data */
 136         Atom ret_type;
 137         int ret_size;
 138         unsigned long ret_items, bytes_left;
 139         unsigned char *xdata;
 140         int status = XGetWindowProperty(win->sys->dpy, win->sys->xid,
 141                         atoms[net_strut], 0L, 4L, False, XA_CARDINAL,
 142                         &ret_type, &ret_size, &ret_items, &bytes_left, &xdata);
 143         if (status != Success || ret_size != 32 || ret_items != 4)
 144                 return 0;
 145
 146         int left   = ((int*)xdata)[0];
 147         int right  = ((int*)xdata)[1];
 148         int top    = ((int*)xdata)[2];
 149         int bottom = ((int*)xdata)[3];
 150         if (left == 0 && right == 0 && top == 0 && bottom == 0)
 151                 return 0;
 152
 153         win->sys->strut.left   = left;
 154         win->sys->strut.right  = right;
 155         win->sys->strut.top    = top;
 156         win->sys->strut.bottom = bottom;
 157         root->x += left;
 158         root->y += top;
 159         root->w -= left+right;
 160         root->h -= top+bottom;
 161         return 1;
 162 }
 163
 164 static int del_strut(win_t *root, win_t *win)
 165 {
 166         int left   = win->sys->strut.left;
 167         int right  = win->sys->strut.right;
 168         int top    = win->sys->strut.top;
 169         int bottom = win->sys->strut.bottom;
 170         if (left == 0 && right == 0 && top == 0 && bottom == 0)
 171                 return 0;
 172
 173         root->x -= left;
 174         root->y -= top;
 175         root->w += left+right;
 176         root->h += top+bottom;
 177         return 1;
 178 }
 179
 180 /* Window functions */
 181 static win_t *win_new(Display *dpy, Window xid)
 182 {
 183         XWindowAttributes attr;
 184         if (XGetWindowAttributes(dpy, xid, &attr))
 185                 if (attr.override_redirect)
 186                         return NULL;
 187         win_t *win    = new0(win_t);
 188         win->x        = attr.x;
 189         win->y        = attr.y;
 190         win->w        = attr.width;
 191         win->h        = attr.height;
 192         win->sys      = new0(win_sys_t);
 193         win->sys->dpy = dpy;
 194         win->sys->xid = xid;
 195         printf("win_new: %p = %p, %d (%d,%d %dx%d)\n",
 196                         win, dpy, (int)xid,
 197                         win->x, win->y, win->w, win->h);
 198         return win;
 199 }
 200
 201 static int win_cmp(const void *_a, const void *_b)
 202 {
 203         const win_t *a = _a, *b = _b;
 204         if (a->sys->dpy < b->sys->dpy) return -1;
 205         if (a->sys->dpy > b->sys->dpy) return  1;
 206         if (a->sys->xid < b->sys->xid) return -1;
 207         if (a->sys->xid > b->sys->xid) return  1;
 208         return 0;
 209 }
 210
 211 static win_t *win_find(Display *dpy, Window xid, int create)
 212 {
 213         if (!dpy || !xid)
 214                 return NULL;
 215         //printf("win_find: %p, %d\n", dpy, (int)xid);
 216         win_sys_t sys = {.dpy=dpy, .xid=xid};
 217         win_t     tmp = {.sys=&sys};
 218         win_t **old = NULL, *new = NULL;
 219         if ((old = tfind(&tmp, &win_cache, win_cmp)))
 220                 return *old;
 221         if (create && (new = win_new(dpy,xid)))
 222                 tsearch(new, &win_cache, win_cmp);
 223         return new;
 224 }
 225
 226 static void win_remove(win_t *win)
 227 {
 228         tdelete(win, &win_cache, win_cmp);
 229         free(win->sys);
 230         free(win);
 231 }
 232
 233 static int win_viewable(win_t *win)
 234 {
 235         XWindowAttributes attr;
 236         if (XGetWindowAttributes(win->sys->dpy, win->sys->xid, &attr))
 237                 return attr.map_state == IsViewable;
 238         else
 239                 return True;
 240 }
 241
 242 /* Drawing functions */
 243 unsigned long get_color(Display *dpy, const char *name)
 244 {
 245         XColor color;
 246         int screen = DefaultScreen(dpy);
 247         Colormap cmap = DefaultColormap(dpy, screen);
 248         XAllocNamedColor(dpy, cmap, name, &color, &color);
 249         return color.pixel;
 250 }
 251
 252 /* Callbacks */
 253 static void process_event(int type, XEvent *ev, win_t *root)
 254 {
 255         Display  *dpy = root->sys->dpy;
 256         win_t *win = NULL;
 257         printf("event: %d\n", type);
 258
 259         /* Common data for all these events ... */
 260         ptr_t ptr; mod_t mod;
 261         if (type == KeyPress    || type == KeyRelease    ||
 262             type == ButtonPress || type == ButtonRelease ||
 263             type == MotionNotify) {
 264                 Window xid = getfocus(root, ev);
 265                 if (!(win = win_find(dpy,xid,0)))
 266                         return;
 267                 ptr = x2ptr(ev);
 268                 mod = x2mod(ev->xkey.state, type==KeyRelease||type==ButtonRelease);
 269         }
 270
 271         /* Split based on event */
 272         if (type == KeyPress) {
 273                 while (XCheckTypedEvent(dpy, KeyPress, ev));
 274                 KeySym sym = XKeycodeToKeysym(dpy, ev->xkey.keycode, 0);
 275                 wm_handle_key(win, x2key(sym), mod, ptr);
 276         }
 277         else if (type == KeyRelease) {
 278                 //printf("release: %d\n", type);
 279         }
 280         else if (type == ButtonPress) {
 281                 if (wm_handle_key(win, x2btn(ev->xbutton.button), mod, ptr))
 282                         XGrabPointer(dpy, ev->xbutton.root, True, PointerMotionMask|ButtonReleaseMask,
 283                                         GrabModeAsync, GrabModeAsync, None, None, CurrentTime);
 284                 else {
 285                         printf("resending event\n");
 286                         XSendEvent(win->sys->dpy, ev->xbutton.window,    True,  NoEventMask, ev);
 287                         XSendEvent(win->sys->dpy, ev->xbutton.window,    False, NoEventMask, ev);
 288                         XSendEvent(win->sys->dpy, ev->xbutton.root,      True,  NoEventMask, ev);
 289                         XSendEvent(win->sys->dpy, ev->xbutton.root,      False, NoEventMask, ev);
 290                         XSendEvent(win->sys->dpy, ev->xbutton.subwindow, True,  NoEventMask, ev);
 291                         XSendEvent(win->sys->dpy, ev->xbutton.subwindow, False, NoEventMask, ev);
 292                 }
 293         }
 294         else if (type == ButtonRelease) {
 295                 XUngrabPointer(dpy, CurrentTime);
 296                 wm_handle_key(win, x2btn(ev->xbutton.button), mod, ptr);
 297         }
 298         else if (type == MotionNotify) {
 299                 while (XCheckTypedEvent(dpy, MotionNotify, ev));
 300                 wm_handle_ptr(win, ptr);
 301         }
 302         else if (type == EnterNotify || type == LeaveNotify) {
 303                 printf("enter: %d\n", type);
 304                 key_t key = EnterNotify ? key_enter : key_leave;
 305                 if ((win = win_find(dpy,ev->xcrossing.window,0)))
 306                         wm_handle_key(win, key, MOD(), PTR());
 307         }
 308         else if (type == FocusIn || type == FocusOut) {
 309                 printf("focus: %d\n", type);
 310                 key_t key = FocusIn ? key_focus : key_unfocus;
 311                 if ((win = win_find(dpy,ev->xfocus.window,0)))
 312                         wm_handle_key(win, key, MOD(), PTR());
 313         }
 314         else if (type == ConfigureNotify) {
 315                 printf("configure: %d\n", type);
 316         }
 317         else if (type == MapNotify) {
 318                 printf("map: %d\n", type);
 319         }
 320         else if (type == UnmapNotify) {
 321                 //printf("unmap: %d\n", type);
 322                 if ((win = win_find(dpy,ev->xunmap.window,0))) {
 323                         if (!del_strut(root, win))
 324                                 wm_remove(win);
 325                         else
 326                                 wm_update();
 327                         win_remove(win);
 328                 }
 329         }
 330         else if (type == ConfigureRequest) {
 331                 XConfigureRequestEvent *cre = &ev->xconfigurerequest;
 332                 printf("configure_req: %d - %x, (0x%lx) %dx%d @ %d,%d\n",
 333                                 type, (int)cre->window, cre->value_mask,
 334                                 cre->height, cre->width, cre->x, cre->y);
 335                 XConfigureWindow(dpy, cre->window, cre->value_mask, &(XWindowChanges){
 336                         .x      = cre->x,
 337                         .y      = cre->y,
 338                         .width  = cre->width,
 339                         .height = cre->height,
 340                 });
 341
 342                 /* This seems necessasairy for, but causes flicker
 343                  * there could be a better way to do this */
 344                 if ((win = win_find(dpy,ev->xmaprequest.window,0)))
 345                         sys_move(win, win->x, win->y, win->w, win->h);
 346         }
 347         else if (type == MapRequest) {
 348                 printf("map_req: %d\n", type);
 349                 if ((win = win_find(dpy,ev->xmaprequest.window,1))) {
 350                         if (!add_strut(root, win))
 351                                 wm_insert(win);
 352                         else
 353                                 wm_update();
 354                 }
 355                 XMapWindow(dpy,ev->xmaprequest.window);
 356         }
 357         else {
 358                 printf("unknown event: %d\n", type);
 359         }
 360 }
 361
 362 static int xerror(Display *dpy, XErrorEvent *err)
 363 {
 364         if (err->error_code == BadWindow ||
 365             (err->request_code == X_SetInputFocus     && err->error_code == BadMatch   ) ||
 366             (err->request_code == X_PolyText8         && err->error_code == BadDrawable) ||
 367             (err->request_code == X_PolyFillRectangle && err->error_code == BadDrawable) ||
 368             (err->request_code == X_PolySegment       && err->error_code == BadDrawable) ||
 369             (err->request_code == X_ConfigureWindow   && err->error_code == BadMatch   ) ||
 370             (err->request_code == X_GrabButton        && err->error_code == BadAccess  ) ||
 371             (err->request_code == X_GrabKey           && err->error_code == BadAccess  ) ||
 372             (err->request_code == X_CopyArea          && err->error_code == BadDrawable))
 373                 return 0;
 374         return xerrorxlib(dpy, err);
 375 }
 376
 377 /*****************
 378  * Sys functions *
 379  *****************/
 380 void sys_move(win_t *win, int x, int y, int w, int h)
 381 {
 382         //printf("sys_move: %p - %d,%d  %dx%d\n", win, x, y, w, h);
 383         int b = 2*BORDER;
 384         win->x = MAX(x,0);   win->y = MAX(y,0);
 385         win->w = MAX(w,1+b); win->h = MAX(h,1+b);
 386         w      = MAX(w-b,1); h      = MAX(h-b,1);
 387         XMoveResizeWindow(win->sys->dpy, win->sys->xid, x, y, w, h);
 388
 389         /* Flush events, so moving window doesn't cuase re-focus
 390          * There's probably a better way to do this */
 391         XEvent ev;
 392         XSync(win->sys->dpy, False);
 393         while (XCheckMaskEvent(win->sys->dpy, EnterWindowMask|LeaveWindowMask, &ev))
 394                 printf("Skipping enter/leave event\n");
 395 }
 396
 397 void sys_raise(win_t *win)
 398 {
 399         //printf("sys_raise: %p\n", win);
 400         XRaiseWindow(win->sys->dpy, win->sys->xid);
 401 }
 402
 403 void sys_focus(win_t *win)
 404 {
 405         printf("sys_focus: %p\n", win);
 406
 407         /* Set border on focused window */
 408         static win_t *last = NULL;
 409         if (last)
 410                 XSetWindowBorder(last->sys->dpy, last->sys->xid, colors[clr_unfocus]);
 411         XSetWindowBorder(win->sys->dpy, win->sys->xid, colors[clr_focus]);
 412         XSetWindowBorderWidth(win->sys->dpy, win->sys->xid, BORDER);
 413         last = win;
 414
 415         /* Set actual focus */
 416         XSetInputFocus(win->sys->dpy, win->sys->xid,
 417                         RevertToPointerRoot, CurrentTime);
 418         XSendEvent(win->sys->dpy, win->sys->xid, False, NoEventMask, &(XEvent){
 419                 .type                 = ClientMessage,
 420                 .xclient.window       = win->sys->xid,
 421                 .xclient.message_type = atoms[wm_proto],
 422                 .xclient.format       = 32,
 423                 .xclient.data.l[0]    = atoms[wm_focus],
 424                 .xclient.data.l[1]    = CurrentTime,
 425         });
 426 }
 427
 428 void sys_watch(win_t *win, Key_t key, mod_t mod)
 429 {
 430         //printf("sys_watch: %p - %x %hhx\n", win, key, mod);
 431         XWindowAttributes attr;
 432         XGetWindowAttributes(win->sys->dpy, win->sys->xid, &attr);
 433         long mask = attr.your_event_mask;
 434         if (key_mouse0 <= key && key <= key_mouse7)
 435                 XGrabButton(win->sys->dpy, btn2x(key), mod2x(mod), win->sys->xid, False,
 436                                 mod.up ? ButtonReleaseMask : ButtonPressMask,
 437                                 GrabModeAsync, GrabModeAsync, None, None);
 438         else if (key == key_enter)
 439                 XSelectInput(win->sys->dpy, win->sys->xid, EnterWindowMask|mask);
 440         else if (key == key_leave)
 441                 XSelectInput(win->sys->dpy, win->sys->xid, LeaveWindowMask|mask);
 442         else if (key == key_focus || key == key_unfocus)
 443                 XSelectInput(win->sys->dpy, win->sys->xid, FocusChangeMask|mask);
 444         else
 445                 XGrabKey(win->sys->dpy, XKeysymToKeycode(win->sys->dpy, key2x(key)),
 446                                 mod2x(mod), win->sys->xid, True, GrabModeAsync, GrabModeAsync);
 447 }
 448
 449 void sys_unwatch(win_t *win, Key_t key, mod_t mod)
 450 {
 451         if (key_mouse0 <= key && key <= key_mouse7)
 452                 XUngrabButton(win->sys->dpy, btn2x(key), mod2x(mod), win->sys->xid);
 453 }
 454
 455 list_t *sys_info(win_t *win)
 456 {
 457         int n;
 458         XineramaScreenInfo *info = NULL;
 459         if (XineramaIsActive(win->sys->dpy))
 460                 info = XineramaQueryScreens(win->sys->dpy, &n);
 461         if (!info) {
 462                 win_t *screen = new0(win_t);
 463                 *screen = *win;
 464                 return list_insert(NULL, screen);
 465         }
 466         list_t *screens = NULL;
 467         for (int i = 0; i < n; i++) {
 468                 win_t *screen = new0(win_t);
 469                 screen->x = info[i].x_org;
 470                 screen->y = info[i].y_org;
 471                 screen->w = info[i].width;
 472                 screen->h = info[i].height;
 473                 screens = list_append(screens, screen);
 474         }
 475         return screens;
 476 }
 477
 478 win_t *sys_init(void)
 479 {
 480         Display *dpy;
 481         Window   xid;
 482
 483         /* Open the display */
 484         if (!(dpy = XOpenDisplay(NULL)))
 485                 error("Unable to get display");
 486         if (!(xid = DefaultRootWindow(dpy)))
 487                 error("Unable to get root window");
 488
 489         /* Setup X11 data */
 490         atoms[wm_proto]  = XInternAtom(dpy, "WM_PROTOCOLS",  False);
 491         atoms[wm_focus]  = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
 492         atoms[net_strut] = XInternAtom(dpy, "_NET_WM_STRUT", False);
 493
 494         colors[clr_focus]   = get_color(dpy, "#a0a0ff");
 495         colors[clr_unfocus] = get_color(dpy, "#101066");
 496         colors[clr_urgent]  = get_color(dpy, "#ff0000");
 497         printf("colors = #%06lx #%06lx #%06lx\n", colors[0], colors[1], colors[2]);
 498
 499         /* Selec Window Managmenet events */
 500         XSelectInput(dpy, xid, SubstructureRedirectMask|SubstructureNotifyMask);
 501         XSetInputFocus(dpy, None, RevertToNone, CurrentTime);
 502         xerrorxlib = XSetErrorHandler(xerror);
 503
 504         return win_find(dpy, xid, 1);
 505 }
 506
 507 void sys_run(win_t *root)
 508 {
 509         /* Add each initial window */
 510         unsigned int nkids;
 511         Window par, xid, *kids = NULL;
 512         if (XQueryTree(root->sys->dpy, root->sys->xid,
 513                                 &par, &xid, &kids, &nkids))
 514                 for(int i = 0; i < nkids; i++) {
 515                         win_t *win = win_find(root->sys->dpy, kids[i], 1);
 516                         if (win && win_viewable(win) && !add_strut(root,win))
 517                                 wm_insert(win);
 518                 }
 519         wm_update(); // For struts
 520
 521         /* Main loop */
 522         for(;;)
 523         {
 524                 XEvent ev;
 525                 XNextEvent(root->sys->dpy, &ev);
 526                 process_event(ev.type, &ev, root);
 527         }
 528 }