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 #ifndef BORDER
  16 #define BORDER 2
  17 #endif
  18
  19 /* Internal structures */
  20 struct win_sys {
  21         Window   xid;
  22         Display *dpy;
  23         struct {
  24                 int left, right, top, bottom;
  25         } strut;
  26         state_t  state;
  27 };
  28
  29 typedef struct {
  30         Key_t key;
  31         int   sym;
  32 } keymap_t;
  33
  34 typedef enum {
  35         wm_proto, wm_focus, net_strut, natoms
  36 } atom_t;
  37
  38 typedef enum {
  39         clr_focus, clr_unfocus, clr_urgent, ncolors
  40 } color_t;
  41
  42 /* Global data */
  43 static void *cache;
  44 static Atom atoms[natoms];
  45 static int (*xerrorxlib)(Display *, XErrorEvent *);
  46 static unsigned long colors[ncolors];
  47
  48 /* Conversion functions */
  49 static keymap_t key2sym[] = {
  50         {key_left    , XK_Left },
  51         {key_right   , XK_Right},
  52         {key_up      , XK_Up   },
  53         {key_down    , XK_Down },
  54         {key_home    , XK_Home },
  55         {key_end     , XK_End  },
  56         {key_pageup  , XK_Prior},
  57         {key_pagedown, XK_Next },
  58         {key_f1      , XK_F1   },
  59         {key_f2      , XK_F2   },
  60         {key_f3      , XK_F3   },
  61         {key_f4      , XK_F4   },
  62         {key_f5      , XK_F5   },
  63         {key_f6      , XK_F6   },
  64         {key_f7      , XK_F7   },
  65         {key_f8      , XK_F8   },
  66         {key_f9      , XK_F9   },
  67         {key_f10     , XK_F10  },
  68         {key_f11     , XK_F11  },
  69         {key_f12     , XK_F12  },
  70 };
  71
  72 /* - Modifiers */
  73 static mod_t x2mod(unsigned int state, int up)
  74 {
  75         return (mod_t){
  76                .alt   = !!(state & Mod1Mask   ),
  77                .ctrl  = !!(state & ControlMask),
  78                .shift = !!(state & ShiftMask  ),
  79                .win   = !!(state & Mod4Mask   ),
  80                .up    = up,
  81         };
  82 }
  83
  84 static unsigned int mod2x(mod_t mod)
  85 {
  86         return (mod.alt   ? Mod1Mask    : 0)
  87              | (mod.ctrl  ? ControlMask : 0)
  88              | (mod.shift ? ShiftMask   : 0)
  89              | (mod.win   ? Mod4Mask    : 0);
  90 }
  91
  92 /* - Keycodes */
  93 static Key_t x2key(KeySym sym)
  94 {
  95         keymap_t *km = map_getr(key2sym,sym);
  96         return km ? km->key : sym;
  97 }
  98
  99 static KeySym key2x(Key_t key)
 100 {
 101         keymap_t *km = map_get(key2sym,key);
 102         return km ? km->sym : key;
 103 }
 104
 105 static Key_t x2btn(int btn)
 106 {
 107         return btn + key_mouse0;
 108 }
 109
 110 static int btn2x(Key_t key)
 111 {
 112         return key - key_mouse0;
 113 }
 114
 115 /* - Pointers */
 116 static ptr_t x2ptr(XEvent *_ev)
 117 {
 118         XKeyEvent *ev = &_ev->xkey;
 119         return (ptr_t){ev->x, ev->y, ev->x_root, ev->y_root};
 120 }
 121
 122 static Window getfocus(win_t *root, XEvent *event)
 123 {
 124         int revert;
 125         Window focus = PointerRoot;
 126         if (event->type == KeyPress || event->type == KeyRelease)
 127                 XGetInputFocus(root->sys->dpy, &focus, &revert);
 128         if (focus == PointerRoot)
 129                 focus = event->xkey.subwindow;
 130         if (focus == None)
 131                 focus = event->xkey.window;
 132         return focus;
 133 }
 134
 135 /* Helpers */
 136 static int add_strut(win_t *root, win_t *win)
 137 {
 138         /* Get X11 strut data */
 139         Atom ret_type;
 140         int ret_size;
 141         unsigned long ret_items, bytes_left;
 142         unsigned char *xdata;
 143         int status = XGetWindowProperty(win->sys->dpy, win->sys->xid,
 144                         atoms[net_strut], 0L, 4L, False, XA_CARDINAL,
 145                         &ret_type, &ret_size, &ret_items, &bytes_left, &xdata);
 146         if (status != Success || ret_size != 32 || ret_items != 4)
 147                 return 0;
 148
 149         int left   = ((int*)xdata)[0];
 150         int right  = ((int*)xdata)[1];
 151         int top    = ((int*)xdata)[2];
 152         int bottom = ((int*)xdata)[3];
 153         if (left == 0 && right == 0 && top == 0 && bottom == 0)
 154                 return 0;
 155
 156         win->sys->strut.left   = left;
 157         win->sys->strut.right  = right;
 158         win->sys->strut.top    = top;
 159         win->sys->strut.bottom = bottom;
 160         root->x += left;
 161         root->y += top;
 162         root->w -= left+right;
 163         root->h -= top+bottom;
 164         return 1;
 165 }
 166
 167 static int del_strut(win_t *root, win_t *win)
 168 {
 169         int left   = win->sys->strut.left;
 170         int right  = win->sys->strut.right;
 171         int top    = win->sys->strut.top;
 172         int bottom = win->sys->strut.bottom;
 173         if (left == 0 && right == 0 && top == 0 && bottom == 0)
 174                 return 0;
 175
 176         root->x -= left;
 177         root->y -= top;
 178         root->w += left+right;
 179         root->h += top+bottom;
 180         return 1;
 181 }
 182
 183 /* Window functions */
 184 static win_t *win_new(Display *dpy, Window xid)
 185 {
 186         XWindowAttributes attr;
 187         if (XGetWindowAttributes(dpy, xid, &attr))
 188                 if (attr.override_redirect)
 189                         return NULL;
 190         win_t *win    = new0(win_t);
 191         win->x        = attr.x;
 192         win->y        = attr.y;
 193         win->w        = attr.width;
 194         win->h        = attr.height;
 195         win->sys      = new0(win_sys_t);
 196         win->sys->dpy = dpy;
 197         win->sys->xid = xid;
 198         printf("win_new: %p = %p, %d (%d,%d %dx%d)\n",
 199                         win, dpy, (int)xid,
 200                         win->x, win->y, win->w, win->h);
 201         return win;
 202 }
 203
 204 static int win_cmp(const void *_a, const void *_b)
 205 {
 206         const win_t *a = _a, *b = _b;
 207         if (a->sys->dpy < b->sys->dpy) return -1;
 208         if (a->sys->dpy > b->sys->dpy) return  1;
 209         if (a->sys->xid < b->sys->xid) return -1;
 210         if (a->sys->xid > b->sys->xid) return  1;
 211         return 0;
 212 }
 213
 214 static win_t *win_find(Display *dpy, Window xid, int create)
 215 {
 216         if (!dpy || !xid)
 217                 return NULL;
 218         //printf("win_find: %p, %d\n", dpy, (int)xid);
 219         win_sys_t sys = {.dpy=dpy, .xid=xid};
 220         win_t     tmp = {.sys=&sys};
 221         win_t **old = NULL, *new = NULL;
 222         if ((old = tfind(&tmp, &cache, win_cmp)))
 223                 return *old;
 224         if (create && (new = win_new(dpy,xid)))
 225                 tsearch(new, &cache, win_cmp);
 226         return new;
 227 }
 228
 229 static void win_remove(win_t *win)
 230 {
 231         tdelete(win, &cache, win_cmp);
 232         free(win->sys);
 233         free(win);
 234 }
 235
 236 static int win_viewable(win_t *win)
 237 {
 238         XWindowAttributes attr;
 239         if (XGetWindowAttributes(win->sys->dpy, win->sys->xid, &attr))
 240                 return attr.map_state == IsViewable;
 241         else
 242                 return True;
 243 }
 244
 245 /* Drawing functions */
 246 unsigned long get_color(Display *dpy, const char *name)
 247 {
 248         XColor color;
 249         int screen = DefaultScreen(dpy);
 250         Colormap cmap = DefaultColormap(dpy, screen);
 251         XAllocNamedColor(dpy, cmap, name, &color, &color);
 252         return color.pixel;
 253 }
 254
 255 /* Callbacks */
 256 static void process_event(int type, XEvent *ev, win_t *root)
 257 {
 258         Display  *dpy = root->sys->dpy;
 259         win_t *win = NULL;
 260         //printf("event: %d\n", type);
 261
 262         /* Common data for all these events ... */
 263         ptr_t ptr; mod_t mod;
 264         if (type == KeyPress    || type == KeyRelease    ||
 265             type == ButtonPress || type == ButtonRelease ||
 266             type == MotionNotify) {
 267                 Window xid = getfocus(root, ev);
 268                 if (!(win = win_find(dpy,xid,0)))
 269                         return;
 270                 ptr = x2ptr(ev);
 271                 mod = x2mod(ev->xkey.state, type==KeyRelease||type==ButtonRelease);
 272         }
 273
 274         /* Split based on event */
 275         if (type == KeyPress) {
 276                 while (XCheckTypedEvent(dpy, KeyPress, ev));
 277                 KeySym sym = XKeycodeToKeysym(dpy, ev->xkey.keycode, 0);
 278                 printf("got key %c %hhx\n", x2key(sym), mod2int(mod));
 279                 wm_handle_key(win, x2key(sym), mod, ptr);
 280         }
 281         else if (type == KeyRelease) {
 282                 //printf("release: %d\n", type);
 283         }
 284         else if (type == ButtonPress) {
 285                 if (wm_handle_key(win, x2btn(ev->xbutton.button), mod, ptr))
 286                         XGrabPointer(dpy, ev->xbutton.root, True, PointerMotionMask|ButtonReleaseMask,
 287                                         GrabModeAsync, GrabModeAsync, None, None, CurrentTime);
 288                 else {
 289                         printf("resending event\n");
 290                         XSendEvent(win->sys->dpy, ev->xbutton.window,    True,  NoEventMask, ev);
 291                         XSendEvent(win->sys->dpy, ev->xbutton.window,    False, NoEventMask, ev);
 292                         XSendEvent(win->sys->dpy, ev->xbutton.root,      True,  NoEventMask, ev);
 293                         XSendEvent(win->sys->dpy, ev->xbutton.root,      False, NoEventMask, ev);
 294                         XSendEvent(win->sys->dpy, ev->xbutton.subwindow, True,  NoEventMask, ev);
 295                         XSendEvent(win->sys->dpy, ev->xbutton.subwindow, False, NoEventMask, ev);
 296                 }
 297         }
 298         else if (type == ButtonRelease) {
 299                 XUngrabPointer(dpy, CurrentTime);
 300                 wm_handle_key(win, x2btn(ev->xbutton.button), mod, ptr);
 301         }
 302         else if (type == MotionNotify) {
 303                 while (XCheckTypedEvent(dpy, MotionNotify, ev));
 304                 wm_handle_ptr(win, ptr);
 305         }
 306         else if (type == EnterNotify || type == LeaveNotify) {
 307                 printf("enter: %d\n", type);
 308                 key_t key = EnterNotify ? key_enter : key_leave;
 309                 if ((win = win_find(dpy,ev->xcrossing.window,0)))
 310                         wm_handle_key(win, key, MOD(), PTR());
 311         }
 312         else if (type == FocusIn || type == FocusOut) {
 313                 //printf("focus: %d\n", type);
 314                 key_t key = FocusIn ? key_focus : key_unfocus;
 315                 if ((win = win_find(dpy,ev->xfocus.window,0)))
 316                         wm_handle_key(win, key, MOD(), PTR());
 317         }
 318         else if (type == ConfigureNotify) {
 319                 printf("configure: %d\n", type);
 320         }
 321         else if (type == MapNotify) {
 322                 printf("map: %d\n", type);
 323         }
 324         else if (type == UnmapNotify) {
 325                 if ((win = win_find(dpy,ev->xunmap.window,0)) &&
 326                      win->sys->state == st_show) {
 327                         if (!del_strut(root, win))
 328                                 wm_remove(win);
 329                         else
 330                                 wm_update();
 331                         win->sys->state = st_hide;
 332                 }
 333         }
 334         else if (type == DestroyNotify) {
 335                 //printf("destroy: %d\n", type);
 336                 if ((win = win_find(dpy,ev->xdestroywindow.window,0)))
 337                         win_remove(win);
 338         }
 339         else if (type == ConfigureRequest) {
 340                 XConfigureRequestEvent *cre = &ev->xconfigurerequest;
 341                 printf("configure_req: %d - %x, (0x%lx) %dx%d @ %d,%d\n",
 342                                 type, (int)cre->window, cre->value_mask,
 343                                 cre->height, cre->width, cre->x, cre->y);
 344                 XConfigureWindow(dpy, cre->window, cre->value_mask, &(XWindowChanges){
 345                         .x      = cre->x,
 346                         .y      = cre->y,
 347                         .width  = cre->width,
 348                         .height = cre->height,
 349                 });
 350
 351                 /* This seems necessasairy for, but causes flicker
 352                  * there could be a better way to do this */
 353                 if ((win = win_find(dpy,ev->xmaprequest.window,0)))
 354                         sys_move(win, win->x, win->y, win->w, win->h);
 355         }
 356         else if (type == MapRequest) {
 357                 printf("map_req: %d\n", type);
 358                 if ((win = win_find(dpy,ev->xmaprequest.window,1))) {
 359                         if (!add_strut(root, win))
 360                                 wm_insert(win);
 361                         else
 362                                 wm_update();
 363                 }
 364                 XMapWindow(dpy,ev->xmaprequest.window);
 365         }
 366         else {
 367                 printf("unknown event: %d\n", type);
 368         }
 369 }
 370
 371 static int xerror(Display *dpy, XErrorEvent *err)
 372 {
 373         if (err->error_code == BadWindow ||
 374             (err->request_code == X_SetInputFocus     && err->error_code == BadMatch   ) ||
 375             (err->request_code == X_PolyText8         && err->error_code == BadDrawable) ||
 376             (err->request_code == X_PolyFillRectangle && err->error_code == BadDrawable) ||
 377             (err->request_code == X_PolySegment       && err->error_code == BadDrawable) ||
 378             (err->request_code == X_ConfigureWindow   && err->error_code == BadMatch   ) ||
 379             (err->request_code == X_GrabButton        && err->error_code == BadAccess  ) ||
 380             (err->request_code == X_GrabKey           && err->error_code == BadAccess  ) ||
 381             (err->request_code == X_CopyArea          && err->error_code == BadDrawable))
 382                 return 0;
 383         return xerrorxlib(dpy, err);
 384 }
 385
 386 /*****************
 387  * Sys functions *
 388  *****************/
 389 void sys_move(win_t *win, int x, int y, int w, int h)
 390 {
 391         //printf("sys_move: %p - %d,%d  %dx%d\n", win, x, y, w, h);
 392         int b = 2*BORDER;
 393         win->x = x; win->y = y;
 394         win->w = MAX(w,1+b); win->h = MAX(h,1+b);
 395         w      = MAX(w-b,1); h      = MAX(h-b,1);
 396         XMoveResizeWindow(win->sys->dpy, win->sys->xid, x, y, w, h);
 397
 398         /* Flush events, so moving window doesn't cuase re-focus
 399          * There's probably a better way to do this */
 400         XEvent ev;
 401         XSync(win->sys->dpy, False);
 402         while (XCheckMaskEvent(win->sys->dpy, EnterWindowMask|LeaveWindowMask, &ev))
 403                 printf("Skipping enter/leave event\n");
 404 }
 405
 406 void sys_raise(win_t *win)
 407 {
 408         //printf("sys_raise: %p\n", win);
 409         XRaiseWindow(win->sys->dpy, win->sys->xid);
 410 }
 411
 412 void sys_focus(win_t *win)
 413 {
 414         //printf("sys_focus: %p\n", win);
 415
 416         /* Set border on focused window */
 417         static win_t *last = NULL;
 418         if (last)
 419                 XSetWindowBorder(last->sys->dpy, last->sys->xid, colors[clr_unfocus]);
 420         XSetWindowBorder(win->sys->dpy, win->sys->xid, colors[clr_focus]);
 421         XSetWindowBorderWidth(win->sys->dpy, win->sys->xid, BORDER);
 422         last = win;
 423
 424         /* Set actual focus */
 425         XSetInputFocus(win->sys->dpy, win->sys->xid,
 426                         RevertToPointerRoot, CurrentTime);
 427         XSendEvent(win->sys->dpy, win->sys->xid, False, NoEventMask, &(XEvent){
 428                 .type                 = ClientMessage,
 429                 .xclient.window       = win->sys->xid,
 430                 .xclient.message_type = atoms[wm_proto],
 431                 .xclient.format       = 32,
 432                 .xclient.data.l[0]    = atoms[wm_focus],
 433                 .xclient.data.l[1]    = CurrentTime,
 434         });
 435 }
 436
 437 void sys_show(win_t *win, state_t state)
 438 {
 439         win->sys->state = state;
 440         switch (state) {
 441         case st_show:
 442                 printf("sys_show: show\n");
 443                 XMapWindow(win->sys->dpy, win->sys->xid);
 444                 return;
 445         case st_full:
 446                 printf("sys_show: full\n");
 447                 return;
 448         case st_shade:
 449                 printf("sys_show: shade\n");
 450                 return;
 451         case st_icon:
 452                 printf("sys_show: icon\n");
 453                 return;
 454         case st_hide:
 455                 printf("sys_show: hide\n");
 456                 XUnmapWindow(win->sys->dpy, win->sys->xid);
 457                 return;
 458         }
 459 }
 460
 461 void sys_watch(win_t *win, Key_t key, mod_t mod)
 462 {
 463         //printf("sys_watch: %p - %x %hhx\n", win, key, mod);
 464         XWindowAttributes attr;
 465         XGetWindowAttributes(win->sys->dpy, win->sys->xid, &attr);
 466         long mask = attr.your_event_mask;
 467         if (key_mouse0 <= key && key <= key_mouse7)
 468                 XGrabButton(win->sys->dpy, btn2x(key), mod2x(mod), win->sys->xid, False,
 469                                 mod.up ? ButtonReleaseMask : ButtonPressMask,
 470                                 GrabModeAsync, GrabModeAsync, None, None);
 471         else if (key == key_enter)
 472                 XSelectInput(win->sys->dpy, win->sys->xid, EnterWindowMask|mask);
 473         else if (key == key_leave)
 474                 XSelectInput(win->sys->dpy, win->sys->xid, LeaveWindowMask|mask);
 475         else if (key == key_focus || key == key_unfocus)
 476                 XSelectInput(win->sys->dpy, win->sys->xid, FocusChangeMask|mask);
 477         else
 478                 XGrabKey(win->sys->dpy, XKeysymToKeycode(win->sys->dpy, key2x(key)),
 479                                 mod2x(mod), win->sys->xid, True, GrabModeAsync, GrabModeAsync);
 480 }
 481
 482 void sys_unwatch(win_t *win, Key_t key, mod_t mod)
 483 {
 484         if (key_mouse0 <= key && key <= key_mouse7)
 485                 XUngrabButton(win->sys->dpy, btn2x(key), mod2x(mod), win->sys->xid);
 486 }
 487
 488 list_t *sys_info(win_t *win)
 489 {
 490         int n;
 491         XineramaScreenInfo *info = NULL;
 492         if (XineramaIsActive(win->sys->dpy))
 493                 info = XineramaQueryScreens(win->sys->dpy, &n);
 494         if (!info) {
 495                 win_t *screen = new0(win_t);
 496                 *screen = *win;
 497                 return list_insert(NULL, screen);
 498         }
 499         list_t *screens = NULL;
 500         for (int i = 0; i < n; i++) {
 501                 win_t *screen = new0(win_t);
 502                 screen->x = info[i].x_org;
 503                 screen->y = info[i].y_org;
 504                 screen->w = info[i].width;
 505                 screen->h = info[i].height;
 506                 screens = list_append(screens, screen);
 507         }
 508         return screens;
 509 }
 510
 511 win_t *sys_init(void)
 512 {
 513         Display *dpy;
 514         Window   xid;
 515
 516         /* Open the display */
 517         if (!(dpy = XOpenDisplay(NULL)))
 518                 error("Unable to get display");
 519         if (!(xid = DefaultRootWindow(dpy)))
 520                 error("Unable to get root window");
 521
 522         /* Setup X11 data */
 523         atoms[wm_proto]  = XInternAtom(dpy, "WM_PROTOCOLS",  False);
 524         atoms[wm_focus]  = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
 525         atoms[net_strut] = XInternAtom(dpy, "_NET_WM_STRUT", False);
 526
 527         colors[clr_focus]   = get_color(dpy, "#a0a0ff");
 528         colors[clr_unfocus] = get_color(dpy, "#101066");
 529         colors[clr_urgent]  = get_color(dpy, "#ff0000");
 530         printf("colors = #%06lx #%06lx #%06lx\n", colors[0], colors[1], colors[2]);
 531
 532         /* Selec Window Managmenet events */
 533         XSelectInput(dpy, xid, SubstructureRedirectMask|SubstructureNotifyMask);
 534         XSetInputFocus(dpy, None, RevertToNone, CurrentTime);
 535         xerrorxlib = XSetErrorHandler(xerror);
 536
 537         return win_find(dpy, xid, 1);
 538 }
 539
 540 void sys_run(win_t *root)
 541 {
 542         /* Add each initial window */
 543         unsigned int nkids;
 544         Window par, xid, *kids = NULL;
 545         if (XQueryTree(root->sys->dpy, root->sys->xid,
 546                                 &par, &xid, &kids, &nkids))
 547                 for(int i = 0; i < nkids; i++) {
 548                         win_t *win = win_find(root->sys->dpy, kids[i], 1);
 549                         if (win && win_viewable(win) && !add_strut(root,win))
 550                                 wm_insert(win);
 551                 }
 552         wm_update(); // For struts
 553
 554         /* Main loop */
 555         for(;;)
 556         {
 557                 XEvent ev;
 558                 XNextEvent(root->sys->dpy, &ev);
 559                 process_event(ev.type, &ev, root);
 560         }
 561 }