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

   1 /*
   2  * Copyright (C) 2011 Andy Spencer <andy753421@gmail.com>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <search.h>
  21
  22 #include <X11/Xlib.h>
  23 #include <X11/Xproto.h>
  24 #include <X11/Xatom.h>
  25 #include <X11/keysym.h>
  26 #include <X11/extensions/Xinerama.h>
  27
  28 #include "util.h"
  29 #include "sys.h"
  30 #include "wm.h"
  31
  32 #ifndef BORDER
  33 #define BORDER 2
  34 #endif
  35
  36 /* Internal structures */
  37 struct win_sys {
  38         Window   xid;
  39         Display *dpy;
  40         struct {
  41                 int left, right, top, bottom;
  42         } strut;
  43         state_t  state;
  44 };
  45
  46 typedef struct {
  47         Key_t key;
  48         int   sym;
  49 } keymap_t;
  50
  51 typedef enum {
  52         wm_proto, wm_focus, net_strut, natoms
  53 } atom_t;
  54
  55 typedef enum {
  56         clr_focus, clr_unfocus, clr_urgent, ncolors
  57 } color_t;
  58
  59 /* Global data */
  60 static void *cache;
  61 static Atom atoms[natoms];
  62 static int (*xerrorxlib)(Display *, XErrorEvent *);
  63 static unsigned long colors[ncolors];
  64 static list_t *screens;
  65
  66 /* Conversion functions */
  67 static keymap_t key2sym[] = {
  68         {key_left    , XK_Left },
  69         {key_right   , XK_Right},
  70         {key_up      , XK_Up   },
  71         {key_down    , XK_Down },
  72         {key_home    , XK_Home },
  73         {key_end     , XK_End  },
  74         {key_pageup  , XK_Prior},
  75         {key_pagedown, XK_Next },
  76         {key_f1      , XK_F1   },
  77         {key_f2      , XK_F2   },
  78         {key_f3      , XK_F3   },
  79         {key_f4      , XK_F4   },
  80         {key_f5      , XK_F5   },
  81         {key_f6      , XK_F6   },
  82         {key_f7      , XK_F7   },
  83         {key_f8      , XK_F8   },
  84         {key_f9      , XK_F9   },
  85         {key_f10     , XK_F10  },
  86         {key_f11     , XK_F11  },
  87         {key_f12     , XK_F12  },
  88 };
  89
  90 /* - Modifiers */
  91 static mod_t x2mod(unsigned int state, int up)
  92 {
  93         return (mod_t){
  94                .alt   = !!(state & Mod1Mask   ),
  95                .ctrl  = !!(state & ControlMask),
  96                .shift = !!(state & ShiftMask  ),
  97                .win   = !!(state & Mod4Mask   ),
  98                .up    = up,
  99         };
 100 }
 101
 102 static unsigned int mod2x(mod_t mod)
 103 {
 104         return (mod.alt   ? Mod1Mask    : 0)
 105              | (mod.ctrl  ? ControlMask : 0)
 106              | (mod.shift ? ShiftMask   : 0)
 107              | (mod.win   ? Mod4Mask    : 0);
 108 }
 109
 110 /* - Keycodes */
 111 static Key_t x2key(KeySym sym)
 112 {
 113         keymap_t *km = map_getr(key2sym,sym);
 114         return km ? km->key : sym;
 115 }
 116
 117 static KeySym key2x(Key_t key)
 118 {
 119         keymap_t *km = map_get(key2sym,key);
 120         return km ? km->sym : key;
 121 }
 122
 123 static Key_t x2btn(int btn)
 124 {
 125         return btn + key_mouse0;
 126 }
 127
 128 static int btn2x(Key_t key)
 129 {
 130         return key - key_mouse0;
 131 }
 132
 133 /* - Pointers */
 134 static ptr_t x2ptr(XEvent *_ev)
 135 {
 136         XKeyEvent *ev = &_ev->xkey;
 137         return (ptr_t){ev->x, ev->y, ev->x_root, ev->y_root};
 138 }
 139
 140 static Window getfocus(win_t *root, XEvent *event)
 141 {
 142         int revert;
 143         Window focus = PointerRoot;
 144         if (event->type == KeyPress || event->type == KeyRelease)
 145                 XGetInputFocus(root->sys->dpy, &focus, &revert);
 146         if (focus == PointerRoot)
 147                 focus = event->xkey.subwindow;
 148         if (focus == None)
 149                 focus = event->xkey.window;
 150         return focus;
 151 }
 152
 153 /* Strut functions
 154  *   Struts are spaces at the edges of the screen that are used by
 155  *   toolbars and statusbars such as dzen. */
 156 static int strut_copy(win_t *to, win_t *from, int scale)
 157 {
 158         int left   = from->sys->strut.left;
 159         int right  = from->sys->strut.right;
 160         int top    = from->sys->strut.top;
 161         int bottom = from->sys->strut.bottom;
 162         if (left == 0 && right == 0 && top == 0 && bottom == 0)
 163                 return 0;
 164         to->x += scale*(left      );
 165         to->y += scale*(top       );
 166         to->w -= scale*(left+right);
 167         to->h -= scale*(top+bottom);
 168         return 1;
 169 }
 170
 171 static int strut_add(win_t *root, win_t *win)
 172 {
 173         /* Get X11 strut data */
 174         Atom ret_type;
 175         int ret_size;
 176         unsigned long ret_items, bytes_left;
 177         unsigned char *xdata;
 178         int status = XGetWindowProperty(win->sys->dpy, win->sys->xid,
 179                         atoms[net_strut], 0L, 4L, False, XA_CARDINAL,
 180                         &ret_type, &ret_size, &ret_items, &bytes_left, &xdata);
 181         if (status != Success || ret_size != 32 || ret_items != 4)
 182                 return 0;
 183
 184         win->sys->strut.left   = ((int*)xdata)[0];
 185         win->sys->strut.right  = ((int*)xdata)[1];
 186         win->sys->strut.top    = ((int*)xdata)[2];
 187         win->sys->strut.bottom = ((int*)xdata)[3];
 188         for (list_t *cur = screens; cur; cur = cur->next)
 189                 strut_copy(cur->data, win, 1);
 190         return strut_copy(root, win, 1);
 191 }
 192
 193 static int strut_del(win_t *root, win_t *win)
 194 {
 195         for (list_t *cur = screens; cur; cur = cur->next)
 196                 strut_copy(cur->data, win, -1);
 197         return strut_copy(root, win, -1);
 198 }
 199
 200 /* Window functions */
 201 static win_t *win_new(Display *dpy, Window xid)
 202 {
 203         XWindowAttributes attr;
 204         if (XGetWindowAttributes(dpy, xid, &attr))
 205                 if (attr.override_redirect)
 206                         return NULL;
 207         win_t *win    = new0(win_t);
 208         win->x        = attr.x;
 209         win->y        = attr.y;
 210         win->w        = attr.width;
 211         win->h        = attr.height;
 212         win->sys      = new0(win_sys_t);
 213         win->sys->dpy = dpy;
 214         win->sys->xid = xid;
 215         printf("win_new: %p = %p, %d (%d,%d %dx%d)\n",
 216                         win, dpy, (int)xid,
 217                         win->x, win->y, win->w, win->h);
 218         return win;
 219 }
 220
 221 static int win_cmp(const void *_a, const void *_b)
 222 {
 223         const win_t *a = _a, *b = _b;
 224         if (a->sys->dpy < b->sys->dpy) return -1;
 225         if (a->sys->dpy > b->sys->dpy) return  1;
 226         if (a->sys->xid < b->sys->xid) return -1;
 227         if (a->sys->xid > b->sys->xid) return  1;
 228         return 0;
 229 }
 230
 231 static win_t *win_find(Display *dpy, Window xid, int create)
 232 {
 233         if (!dpy || !xid)
 234                 return NULL;
 235         //printf("win_find: %p, %d\n", dpy, (int)xid);
 236         win_sys_t sys = {.dpy=dpy, .xid=xid};
 237         win_t     tmp = {.sys=&sys};
 238         win_t **old = NULL, *new = NULL;
 239         if ((old = tfind(&tmp, &cache, win_cmp)))
 240                 return *old;
 241         if (create && (new = win_new(dpy,xid)))
 242                 tsearch(new, &cache, win_cmp);
 243         return new;
 244 }
 245
 246 static void win_remove(win_t *win)
 247 {
 248         tdelete(win, &cache, win_cmp);
 249         free(win->sys);
 250         free(win);
 251 }
 252
 253 static int win_viewable(win_t *win)
 254 {
 255         XWindowAttributes attr;
 256         if (XGetWindowAttributes(win->sys->dpy, win->sys->xid, &attr))
 257                 return attr.map_state == IsViewable;
 258         else
 259                 return True;
 260 }
 261
 262 /* Drawing functions */
 263 static unsigned long get_color(Display *dpy, const char *name)
 264 {
 265         XColor color;
 266         int screen = DefaultScreen(dpy);
 267         Colormap cmap = DefaultColormap(dpy, screen);
 268         XAllocNamedColor(dpy, cmap, name, &color, &color);
 269         return color.pixel;
 270 }
 271
 272 /* Callbacks */
 273 static void process_event(int type, XEvent *ev, win_t *root)
 274 {
 275         Display  *dpy = root->sys->dpy;
 276         win_t *win = NULL;
 277         //printf("event: %d\n", type);
 278
 279         /* Common data for all these events ... */
 280         ptr_t ptr; mod_t mod;
 281         if (type == KeyPress    || type == KeyRelease    ||
 282             type == ButtonPress || type == ButtonRelease ||
 283             type == MotionNotify) {
 284                 Window xid = getfocus(root, ev);
 285                 if (!(win = win_find(dpy,xid,0)))
 286                         return;
 287                 ptr = x2ptr(ev);
 288                 mod = x2mod(ev->xkey.state, type==KeyRelease||type==ButtonRelease);
 289         }
 290
 291         /* Split based on event */
 292         if (type == KeyPress) {
 293                 while (XCheckTypedEvent(dpy, KeyPress, ev));
 294                 KeySym sym = XKeycodeToKeysym(dpy, ev->xkey.keycode, 0);
 295                 printf("got key %c %hhx\n", x2key(sym), mod2int(mod));
 296                 wm_handle_key(win, x2key(sym), mod, ptr);
 297         }
 298         else if (type == KeyRelease) {
 299                 //printf("release: %d\n", type);
 300         }
 301         else if (type == ButtonPress) {
 302                 if (wm_handle_key(win, x2btn(ev->xbutton.button), mod, ptr))
 303                         XGrabPointer(dpy, ev->xbutton.root, True, PointerMotionMask|ButtonReleaseMask,
 304                                         GrabModeAsync, GrabModeAsync, None, None, CurrentTime);
 305                 else {
 306                         printf("resending event\n");
 307                         XSendEvent(win->sys->dpy, ev->xbutton.window,    True,  NoEventMask, ev);
 308                         XSendEvent(win->sys->dpy, ev->xbutton.window,    False, NoEventMask, ev);
 309                         XSendEvent(win->sys->dpy, ev->xbutton.root,      True,  NoEventMask, ev);
 310                         XSendEvent(win->sys->dpy, ev->xbutton.root,      False, NoEventMask, ev);
 311                         XSendEvent(win->sys->dpy, ev->xbutton.subwindow, True,  NoEventMask, ev);
 312                         XSendEvent(win->sys->dpy, ev->xbutton.subwindow, False, NoEventMask, ev);
 313                 }
 314         }
 315         else if (type == ButtonRelease) {
 316                 XUngrabPointer(dpy, CurrentTime);
 317                 wm_handle_key(win, x2btn(ev->xbutton.button), mod, ptr);
 318         }
 319         else if (type == MotionNotify) {
 320                 while (XCheckTypedEvent(dpy, MotionNotify, ev));
 321                 wm_handle_ptr(win, ptr);
 322         }
 323         else if (type == EnterNotify || type == LeaveNotify) {
 324                 printf("enter: %d\n", type);
 325                 key_t key = EnterNotify ? key_enter : key_leave;
 326                 if ((win = win_find(dpy,ev->xcrossing.window,0)))
 327                         wm_handle_key(win, key, MOD(), PTR());
 328         }
 329         else if (type == FocusIn || type == FocusOut) {
 330                 //printf("focus: %d\n", type);
 331                 key_t key = FocusIn ? key_focus : key_unfocus;
 332                 if ((win = win_find(dpy,ev->xfocus.window,0)))
 333                         wm_handle_key(win, key, MOD(), PTR());
 334         }
 335         else if (type == ConfigureNotify) {
 336                 printf("configure: %d\n", type);
 337         }
 338         else if (type == MapNotify) {
 339                 printf("map: %d\n", type);
 340         }
 341         else if (type == UnmapNotify) {
 342                 if ((win = win_find(dpy,ev->xunmap.window,0)) &&
 343                      win->sys->state == st_show) {
 344                         if (!strut_del(root, win))
 345                                 wm_remove(win);
 346                         else
 347                                 wm_update();
 348                         win->sys->state = st_hide;
 349                 }
 350         }
 351         else if (type == DestroyNotify) {
 352                 //printf("destroy: %d\n", type);
 353                 if ((win = win_find(dpy,ev->xdestroywindow.window,0)))
 354                         win_remove(win);
 355         }
 356         else if (type == ConfigureRequest) {
 357                 XConfigureRequestEvent *cre = &ev->xconfigurerequest;
 358                 printf("configure_req: %d - %x, (0x%lx) %dx%d @ %d,%d\n",
 359                                 type, (int)cre->window, cre->value_mask,
 360                                 cre->height, cre->width, cre->x, cre->y);
 361                 XConfigureWindow(dpy, cre->window, cre->value_mask, &(XWindowChanges){
 362                         .x      = cre->x,
 363                         .y      = cre->y,
 364                         .width  = cre->width,
 365                         .height = cre->height,
 366                 });
 367
 368                 /* This seems necessary for, but causes flicker
 369                  * there could be a better way to do this */
 370                 if ((win = win_find(dpy,ev->xmaprequest.window,0)))
 371                         sys_move(win, win->x, win->y, win->w, win->h);
 372         }
 373         else if (type == MapRequest) {
 374                 printf("map_req: %d\n", type);
 375                 if ((win = win_find(dpy,ev->xmaprequest.window,1))) {
 376                         if (!strut_add(root, win))
 377                                 wm_insert(win);
 378                         else
 379                                 wm_update();
 380                 }
 381                 XMapWindow(dpy,ev->xmaprequest.window);
 382         }
 383         else {
 384                 printf("unknown event: %d\n", type);
 385         }
 386 }
 387
 388 static int xerror(Display *dpy, XErrorEvent *err)
 389 {
 390         if (err->error_code == BadWindow ||
 391             (err->request_code == X_SetInputFocus     && err->error_code == BadMatch   ) ||
 392             (err->request_code == X_PolyText8         && err->error_code == BadDrawable) ||
 393             (err->request_code == X_PolyFillRectangle && err->error_code == BadDrawable) ||
 394             (err->request_code == X_PolySegment       && err->error_code == BadDrawable) ||
 395             (err->request_code == X_ConfigureWindow   && err->error_code == BadMatch   ) ||
 396             (err->request_code == X_GrabButton        && err->error_code == BadAccess  ) ||
 397             (err->request_code == X_GrabKey           && err->error_code == BadAccess  ) ||
 398             (err->request_code == X_CopyArea          && err->error_code == BadDrawable))
 399                 return 0;
 400         return xerrorxlib(dpy, err);
 401 }
 402
 403 /********************
 404  * System functions *
 405  ********************/
 406 void sys_move(win_t *win, int x, int y, int w, int h)
 407 {
 408         //printf("sys_move: %p - %d,%d  %dx%d\n", win, x, y, w, h);
 409         int b = 2*BORDER;
 410         win->x = x; win->y = y;
 411         win->w = MAX(w,1+b); win->h = MAX(h,1+b);
 412         w      = MAX(w-b,1); h      = MAX(h-b,1);
 413         XMoveResizeWindow(win->sys->dpy, win->sys->xid, x, y, w, h);
 414
 415         /* Flush events, so moving window doesn't cause re-focus
 416          * There's probably a better way to do this */
 417         XEvent ev;
 418         XSync(win->sys->dpy, False);
 419         while (XCheckMaskEvent(win->sys->dpy, EnterWindowMask|LeaveWindowMask, &ev))
 420                 printf("Skipping enter/leave event\n");
 421 }
 422
 423 void sys_raise(win_t *win)
 424 {
 425         //printf("sys_raise: %p\n", win);
 426         XRaiseWindow(win->sys->dpy, win->sys->xid);
 427 }
 428
 429 void sys_focus(win_t *win)
 430 {
 431         //printf("sys_focus: %p\n", win);
 432
 433         /* Set border on focused window */
 434         static win_t *last = NULL;
 435         if (last)
 436                 XSetWindowBorder(last->sys->dpy, last->sys->xid, colors[clr_unfocus]);
 437         XSetWindowBorder(win->sys->dpy, win->sys->xid, colors[clr_focus]);
 438         XSetWindowBorderWidth(win->sys->dpy, win->sys->xid, BORDER);
 439         last = win;
 440
 441         /* Set actual focus */
 442         XSetInputFocus(win->sys->dpy, win->sys->xid,
 443                         RevertToPointerRoot, CurrentTime);
 444         XSendEvent(win->sys->dpy, win->sys->xid, False, NoEventMask, &(XEvent){
 445                 .type                 = ClientMessage,
 446                 .xclient.window       = win->sys->xid,
 447                 .xclient.message_type = atoms[wm_proto],
 448                 .xclient.format       = 32,
 449                 .xclient.data.l[0]    = atoms[wm_focus],
 450                 .xclient.data.l[1]    = CurrentTime,
 451         });
 452 }
 453
 454 void sys_show(win_t *win, state_t state)
 455 {
 456         win->sys->state = state;
 457         switch (state) {
 458         case st_show:
 459                 printf("sys_show: show\n");
 460                 XMapWindow(win->sys->dpy, win->sys->xid);
 461                 return;
 462         case st_full:
 463                 printf("sys_show: full\n");
 464                 return;
 465         case st_shade:
 466                 printf("sys_show: shade\n");
 467                 return;
 468         case st_icon:
 469                 printf("sys_show: icon\n");
 470                 return;
 471         case st_hide:
 472                 printf("sys_show: hide\n");
 473                 XUnmapWindow(win->sys->dpy, win->sys->xid);
 474                 return;
 475         }
 476 }
 477
 478 void sys_watch(win_t *win, Key_t key, mod_t mod)
 479 {
 480         //printf("sys_watch: %p - %x %hhx\n", win, key, mod);
 481         XWindowAttributes attr;
 482         XGetWindowAttributes(win->sys->dpy, win->sys->xid, &attr);
 483         long mask = attr.your_event_mask;
 484         if (key_mouse0 <= key && key <= key_mouse7)
 485                 XGrabButton(win->sys->dpy, btn2x(key), mod2x(mod), win->sys->xid, False,
 486                                 mod.up ? ButtonReleaseMask : ButtonPressMask,
 487                                 GrabModeAsync, GrabModeAsync, None, None);
 488         else if (key == key_enter)
 489                 XSelectInput(win->sys->dpy, win->sys->xid, EnterWindowMask|mask);
 490         else if (key == key_leave)
 491                 XSelectInput(win->sys->dpy, win->sys->xid, LeaveWindowMask|mask);
 492         else if (key == key_focus || key == key_unfocus)
 493                 XSelectInput(win->sys->dpy, win->sys->xid, FocusChangeMask|mask);
 494         else
 495                 XGrabKey(win->sys->dpy, XKeysymToKeycode(win->sys->dpy, key2x(key)),
 496                                 mod2x(mod), win->sys->xid, True, GrabModeAsync, GrabModeAsync);
 497 }
 498
 499 void sys_unwatch(win_t *win, Key_t key, mod_t mod)
 500 {
 501         if (key_mouse0 <= key && key <= key_mouse7)
 502                 XUngrabButton(win->sys->dpy, btn2x(key), mod2x(mod), win->sys->xid);
 503 }
 504
 505 list_t *sys_info(win_t *win)
 506 {
 507         /* Use global copy of screens so we can add struts */
 508         if (screens == NULL) {
 509                 int n;
 510                 XineramaScreenInfo *info = NULL;
 511                 if (XineramaIsActive(win->sys->dpy))
 512                         info = XineramaQueryScreens(win->sys->dpy, &n);
 513                 if (!info) {
 514                         win_t *screen = new0(win_t);
 515                         *screen = *win;
 516                         return list_insert(NULL, screen);
 517                 }
 518                 for (int i = 0; i < n; i++) {
 519                         win_t *screen = new0(win_t);
 520                         screen->x = info[i].x_org;
 521                         screen->y = info[i].y_org;
 522                         screen->w = info[i].width;
 523                         screen->h = info[i].height;
 524                         screens = list_append(screens, screen);
 525                 }
 526         }
 527         return screens;
 528 }
 529
 530 win_t *sys_init(void)
 531 {
 532         Display *dpy;
 533         Window   xid;
 534
 535         /* Open the display */
 536         if (!(dpy = XOpenDisplay(NULL)))
 537                 error("Unable to get display");
 538         if (!(xid = DefaultRootWindow(dpy)))
 539                 error("Unable to get root window");
 540
 541         /* Setup X11 data */
 542         atoms[wm_proto]  = XInternAtom(dpy, "WM_PROTOCOLS",  False);
 543         atoms[wm_focus]  = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
 544         atoms[net_strut] = XInternAtom(dpy, "_NET_WM_STRUT", False);
 545
 546         colors[clr_focus]   = get_color(dpy, "#a0a0ff");
 547         colors[clr_unfocus] = get_color(dpy, "#101066");
 548         colors[clr_urgent]  = get_color(dpy, "#ff0000");
 549         printf("colors = #%06lx #%06lx #%06lx\n", colors[0], colors[1], colors[2]);
 550
 551         /* Select window management events */
 552         XSelectInput(dpy, xid, SubstructureRedirectMask|SubstructureNotifyMask);
 553         XSetInputFocus(dpy, None, RevertToNone, CurrentTime);
 554         xerrorxlib = XSetErrorHandler(xerror);
 555
 556         return win_find(dpy, xid, 1);
 557 }
 558
 559 void sys_run(win_t *root)
 560 {
 561         /* Add each initial window */
 562         unsigned int nkids;
 563         Window par, xid, *kids = NULL;
 564         if (XQueryTree(root->sys->dpy, root->sys->xid,
 565                                 &par, &xid, &kids, &nkids))
 566                 for(int i = 0; i < nkids; i++) {
 567                         win_t *win = win_find(root->sys->dpy, kids[i], 1);
 568                         if (win && win_viewable(win) && !strut_add(root,win))
 569                                 wm_insert(win);
 570                 }
 571         wm_update(); // For struts
 572
 573         /* Main loop */
 574         for(;;)
 575         {
 576                 XEvent ev;
 577                 XNextEvent(root->sys->dpy, &ev);
 578                 process_event(ev.type, &ev, root);
 579         }
 580 }