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