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

   1 /*
   2  * Copyright (c) 2015 Andy Spencer <andy753421@gmail.com>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  */
  15
  16 #define _GNU_SOURCE
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <search.h>
  20 #include <string.h>
  21
  22 #include <xcb/xcb.h>
  23 #include <xcb/xcb_event.h>
  24 #include <xcb/xcb_keysyms.h>
  25 #include <xcb/xcb_icccm.h>
  26 #include <xcb/xcb_ewmh.h>
  27 #include <xcb/xinerama.h>
  28
  29 #include "util.h"
  30 #include "conf.h"
  31 #include "types.h"
  32 #include "sys.h"
  33 #include "wm.h"
  34
  35 /* Configuration */
  36 static int border     = 2;
  37 static int stack      = 25;
  38 static int no_capture = 0;
  39
  40 /* Internal structures */
  41 typedef struct {
  42         int left;
  43         int right;
  44         int top;
  45         int bottom;
  46 } strut_t;
  47
  48 struct win_sys {
  49         xcb_window_t     xcb;    // xcb window id
  50         xcb_event_mask_t events; // currently watch events
  51         strut_t          strut;  // toolbar struts
  52         int managed;             // window is managed by wm
  53 };
  54
  55 typedef enum {
  56         CLR_FOCUS,
  57         CLR_UNFOCUS,
  58         CLR_URGENT,
  59         NCOLORS
  60 } color_t;
  61
  62 /* Global data */
  63 static xcb_connection_t      *conn;
  64 static xcb_ewmh_connection_t  ewmh;
  65 static xcb_key_symbols_t     *keysyms;
  66 static xcb_colormap_t         colormap;
  67 static xcb_window_t           root;
  68 static xcb_event_mask_t       events;
  69 static list_t                *screens;
  70 static void                  *cache;
  71 static xcb_pixmap_t           colors[NCOLORS];
  72 static unsigned int           grabbed;
  73 static int                    running;
  74 static xcb_window_t           control;
  75 static xcb_atom_t             wm_protos;
  76 static xcb_atom_t             wm_delete;
  77
  78 /************************
  79  * Conversion functions *
  80  ************************/
  81
  82 /* State names */
  83 static char *state_map[] = {
  84         [ST_HIDE ] "hide ",
  85         [ST_SHOW ] "show ",
  86         [ST_FULL ] "full ",
  87         [ST_MAX  ] "max  ",
  88         [ST_SHADE] "shade",
  89         [ST_ICON ] "icon ",
  90         [ST_CLOSE] "close",
  91 };
  92
  93 /* Key presses */
  94 static struct {
  95         event_t      ev;
  96         xcb_keysym_t sym;
  97 } keysym_map[] = {
  98         { EV_LEFT,     0xFF51 },
  99         { EV_RIGHT,    0xFF53 },
 100         { EV_UP,       0xFF52 },
 101         { EV_DOWN,     0xFF54 },
 102         { EV_HOME,     0xFF50 },
 103         { EV_END,      0xFF57 },
 104         { EV_PAGEUP,   0xFF55 },
 105         { EV_PAGEDOWN, 0xFF56 },
 106         { EV_F1,       0xFFBE },
 107         { EV_F2,       0xFFBF },
 108         { EV_F3,       0xFFC0 },
 109         { EV_F4,       0xFFC1 },
 110         { EV_F5,       0xFFC2 },
 111         { EV_F6,       0xFFC3 },
 112         { EV_F7,       0xFFC4 },
 113         { EV_F8,       0xFFC5 },
 114         { EV_F9,       0xFFC6 },
 115         { EV_F10,      0xFFC7 },
 116         { EV_F11,      0xFFC8 },
 117         { EV_F12,      0xFFC9 },
 118 };
 119
 120 /************************
 121  * Conversion functions *
 122  ************************/
 123
 124 static xcb_keycode_t *event_to_keycodes(event_t ev)
 125 {
 126         xcb_keycode_t *codes = NULL;
 127
 128         /* Get keysym */
 129         xcb_keysym_t keysym = map_get(keysym_map, ev, ev, sym, ev);
 130
 131         /* Get keycodes */
 132         if (!(codes = xcb_key_symbols_get_keycode(keysyms, keysym)))
 133                 warn("no keycode found for %d->%d", ev, keysym);
 134
 135         return codes;
 136 }
 137
 138 static event_t keycode_to_event(xcb_keycode_t code)
 139 {
 140         /* Get keysym */
 141         xcb_keysym_t keysym = xcb_key_symbols_get_keysym(keysyms, code, 0);
 142
 143         /* Get event */
 144         return map_get(keysym_map, sym,keysym, ev,keysym);
 145 }
 146
 147 /* Button presses */
 148 static event_t button_to_event(xcb_button_t btn)
 149 {
 150         return EV_MOUSE0 + btn;
 151 }
 152
 153 static xcb_button_t event_to_button(event_t ev)
 154 {
 155         return ev - EV_MOUSE0;
 156 }
 157
 158 /* Modifier masks */
 159 static xcb_mod_mask_t mod_to_mask(mod_t mod)
 160 {
 161         xcb_mod_mask_t mask = 0;
 162         if (mod.alt)   mask |= XCB_MOD_MASK_1;
 163         if (mod.ctrl)  mask |= XCB_MOD_MASK_CONTROL;
 164         if (mod.shift) mask |= XCB_MOD_MASK_SHIFT;
 165         if (mod.win)   mask |= XCB_MOD_MASK_4;
 166         return mask;
 167 }
 168
 169 static mod_t mask_to_mod(xcb_mod_mask_t mask, int up)
 170 {
 171         mod_t mod = { .up = up };
 172         if (mask & XCB_MOD_MASK_1)       mod.alt   = 1;
 173         if (mask & XCB_MOD_MASK_CONTROL) mod.ctrl  = 1;
 174         if (mask & XCB_MOD_MASK_SHIFT)   mod.shift = 1;
 175         if (mask & XCB_MOD_MASK_4)       mod.win   = 1;
 176         return mod;
 177 }
 178
 179 /* Mouse pointers */
 180 static ptr_t list_to_ptr(int16_t *list)
 181 {
 182         ptr_t ptr = {};
 183         if (list) {
 184                 ptr.rx = list[0]; // root_x
 185                 ptr.ry = list[1]; // root_y
 186                 ptr.x  = list[2]; // event_x
 187                 ptr.y  = list[3]; // event_y
 188         }
 189         return ptr;
 190 }
 191
 192 /********************
 193  * Window functions *
 194  ********************/
 195
 196 static int win_cmp(const void *_a, const void *_b)
 197 {
 198         const win_t *a = _a;
 199         const win_t *b = _b;
 200         if (a->sys->xcb < b->sys->xcb) return -1;
 201         if (a->sys->xcb > b->sys->xcb) return  1;
 202         return 0;
 203 }
 204
 205 static win_t *win_get(xcb_window_t xcb)
 206 {
 207         win_sys_t sys = { .xcb =  xcb };
 208         win_t     key = { .sys = &sys };
 209
 210         win_t   **win = tfind(&key, &cache, win_cmp);
 211
 212         if (!win) {
 213                 warn("no window for %u", xcb);
 214                 return NULL;
 215         }
 216
 217         return *win;
 218 }
 219
 220 /****************
 221  * XCB Wrappers *
 222  ****************/
 223
 224 static int do_query_tree(xcb_window_t win, xcb_window_t **kids)
 225 {
 226         xcb_query_tree_cookie_t cookie =
 227                 xcb_query_tree(conn, win);
 228         if (!cookie.sequence)
 229                 return warn("do_query_tree: %d - bad cookie", win);
 230
 231         xcb_query_tree_reply_t *reply =
 232                 xcb_query_tree_reply(conn, cookie, NULL);
 233         if (!reply)
 234                 return warn("do_query_tree: %d - no reply", win);
 235
 236         int nkids = xcb_query_tree_children_length(reply);
 237         *kids = xcb_query_tree_children(reply);
 238         printf("do_query_tree: %d - n=%d\n", win, nkids);
 239         return nkids;
 240 }
 241
 242 static int do_get_geometry(xcb_window_t win,
 243                 int *x, int *y, int *w, int *h)
 244 {
 245         xcb_get_geometry_cookie_t cookie =
 246                 xcb_get_geometry(conn, win);
 247         if (!cookie.sequence)
 248                 return warn("do_get_geometry: %d - bad cookie", win);
 249
 250         xcb_get_geometry_reply_t *reply =
 251                 xcb_get_geometry_reply(conn, cookie, NULL);
 252         if (!reply)
 253                 return warn("do_get_geometry: %d - no reply", win);
 254
 255         printf("do_get_geometry: %d - %dx%d @ %d,%d\n",
 256                         win, reply->width, reply->height, reply->x, reply->y);
 257         *x = reply->x;
 258         *y = reply->y;
 259         *w = reply->width;
 260         *h = reply->height;
 261         return 1;
 262 }
 263
 264 static int do_get_window_attributes(xcb_window_t win,
 265                 int *override, int *mapped)
 266 {
 267         xcb_get_window_attributes_cookie_t cookie =
 268                 xcb_get_window_attributes(conn, win);
 269         if (!cookie.sequence)
 270                 return warn("do_get_window_attributes: %d - bad cookie", win);
 271
 272         xcb_get_window_attributes_reply_t *reply =
 273                 xcb_get_window_attributes_reply(conn, cookie, NULL);
 274         if (!reply)
 275                 return warn("do_get_window_attributes: %d - no reply ", win);
 276
 277         printf("do_get_window_attributes: %d - %d\n",
 278                         win, reply->override_redirect);
 279         *override = reply->override_redirect;
 280         *mapped   = reply->map_state != XCB_MAP_STATE_UNMAPPED;
 281         return 1;
 282 }
 283
 284 static int do_xinerama_check(void)
 285 {
 286         const xcb_query_extension_reply_t *data =
 287                 xcb_get_extension_data(conn, &xcb_xinerama_id);
 288         if (!data || !data->present)
 289                 return warn("do_xinerama_check: no ext");
 290
 291         xcb_xinerama_is_active_cookie_t cookie =
 292                 xcb_xinerama_is_active(conn);
 293         if (!cookie.sequence)
 294                 return warn("do_xinerama_check: no cookie");
 295
 296         xcb_xinerama_is_active_reply_t *reply =
 297                 xcb_xinerama_is_active_reply(conn, cookie, NULL);
 298         if (!reply)
 299                 warn("do_xinerama_check: no reply");
 300
 301         printf("do_xinerama_check: %d\n", reply->state);
 302         return reply && reply->state;
 303 }
 304
 305 static int do_query_screens(xcb_xinerama_screen_info_t **info)
 306 {
 307         xcb_xinerama_query_screens_cookie_t cookie =
 308                 xcb_xinerama_query_screens(conn);
 309         if (!cookie.sequence)
 310                 return warn("do_query_screens: bad cookie");
 311
 312         xcb_xinerama_query_screens_reply_t *reply =
 313                 xcb_xinerama_query_screens_reply(conn, cookie, NULL);
 314         if (!reply)
 315                 return warn("do_query_screens: no reply");
 316
 317         int ninfo = xcb_xinerama_query_screens_screen_info_length(reply);
 318         *info = xcb_xinerama_query_screens_screen_info(reply);
 319         printf("do_query_screens: %d screens\n", ninfo);
 320         return ninfo;
 321 }
 322
 323 static int do_get_input_focus(void)
 324 {
 325         xcb_get_input_focus_cookie_t cookie =
 326                 xcb_get_input_focus(conn);
 327         if (!cookie.sequence)
 328                 return warn("do_get_input_focus: bad cookie");
 329
 330         xcb_get_input_focus_reply_t *reply =
 331                 xcb_get_input_focus_reply(conn, cookie, NULL);
 332         if (!reply)
 333                 return warn("do_get_input_focus: no reply");
 334
 335         return reply->focus;
 336 }
 337
 338 static xcb_atom_t do_intern_atom(const char *name)
 339 {
 340         xcb_intern_atom_cookie_t cookie =
 341                 xcb_intern_atom(conn, 0, strlen(name), name);
 342         if (!cookie.sequence)
 343                 return warn("do_intern_atom: bad cookie");
 344
 345         xcb_intern_atom_reply_t *reply =
 346                 xcb_intern_atom_reply(conn, cookie, NULL);
 347         if (!reply)
 348                 return warn("do_intern_atom: no reply");
 349
 350         xcb_atom_t atom = reply->atom;
 351         free(reply);
 352         return atom;
 353 }
 354
 355 static int do_ewmh_init_atoms(void)
 356 {
 357         xcb_intern_atom_cookie_t *cookies =
 358                 xcb_ewmh_init_atoms(conn, &ewmh);
 359         if (!cookies)
 360                 return warn("do_ewmh_init_atoms: no cookies");
 361
 362         int status =
 363                 xcb_ewmh_init_atoms_replies(&ewmh, cookies, NULL);
 364         if (!status)
 365                 return warn("do_ewmh_init_atoms: no status");
 366         return status;
 367 }
 368
 369 static int do_get_strut(xcb_window_t win, strut_t *strut)
 370 {
 371         xcb_get_property_cookie_t cookie =
 372                 xcb_ewmh_get_wm_strut(&ewmh, win);
 373         if (!cookie.sequence)
 374                 return warn("do_get_strut: bad cookie");
 375
 376         xcb_ewmh_get_extents_reply_t ext = {};
 377         int status =
 378                 xcb_ewmh_get_wm_strut_reply(&ewmh, cookie, &ext, NULL);
 379         if (!status)
 380                 return warn("do_get_strut: no status");
 381
 382         strut->left   = ext.left;
 383         strut->right  = ext.right;
 384         strut->top    = ext.top;
 385         strut->bottom = ext.bottom;
 386
 387         return ext.left || ext.right || ext.top || ext.bottom;
 388 }
 389
 390 static xcb_pixmap_t do_alloc_color(uint32_t rgb)
 391 {
 392         uint16_t r = (rgb & 0xFF0000) >> 8;
 393         uint16_t g = (rgb & 0x00FF00);
 394         uint16_t b = (rgb & 0x0000FF) << 8;
 395         xcb_alloc_color_cookie_t cookie =
 396                 xcb_alloc_color(conn, colormap, r, g, b);
 397         if (!cookie.sequence)
 398                 return warn("do_alloc_color: bad cookie");
 399
 400         xcb_alloc_color_reply_t *reply =
 401                 xcb_alloc_color_reply(conn, cookie, NULL);
 402         if (!reply)
 403                 return warn("do_alloc_color: no reply");
 404
 405         printf("do_alloc_color: %06x -> %06x\n", rgb, reply->pixel);
 406         xcb_pixmap_t pixel = reply->pixel;
 407         free(reply);
 408         return pixel;
 409 }
 410
 411 static void do_grab_pointer(xcb_event_mask_t mask)
 412 {
 413         if (!grabbed)
 414                 xcb_grab_pointer(conn, 0, root, mask,
 415                                 XCB_GRAB_MODE_ASYNC,
 416                                 XCB_GRAB_MODE_ASYNC,
 417                                 0, 0, XCB_CURRENT_TIME);
 418         grabbed++;
 419 }
 420
 421 static void do_ungrab_pointer(void)
 422 {
 423         grabbed--;
 424         if (!grabbed)
 425                 xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 426 }
 427
 428 static void do_configure_window(xcb_window_t win,
 429                 int x, int y, int w, int h,
 430                 int b, int s, int r)
 431 {
 432         int table[][2] = {
 433                 { x, XCB_CONFIG_WINDOW_X            },
 434                 { y, XCB_CONFIG_WINDOW_Y            },
 435                 { w, XCB_CONFIG_WINDOW_WIDTH        },
 436                 { h, XCB_CONFIG_WINDOW_HEIGHT       },
 437                 { b, XCB_CONFIG_WINDOW_BORDER_WIDTH },
 438                 { s, XCB_CONFIG_WINDOW_SIBLING      },
 439                 { r, XCB_CONFIG_WINDOW_STACK_MODE   },
 440         };
 441
 442         uint16_t mask    = 0;
 443         uint32_t list[7] = {};
 444         for (int i = 0; i < 7; i++) {
 445                 if (table[i][0] >= 0) {
 446                         list[i] = table[i][0];
 447                         mask   |= table[i][1];
 448                 }
 449         }
 450
 451         xcb_configure_window(conn, win, mask, list);
 452 }
 453
 454 static int do_client_message(xcb_window_t win, xcb_atom_t atom)
 455 {
 456         /* Get protocols */
 457         xcb_get_property_cookie_t cookie =
 458                 xcb_icccm_get_wm_protocols(conn, win, wm_protos);
 459         if (!cookie.sequence)
 460                 return warn("do_client_message: %d - bad cookie", win);
 461
 462         xcb_icccm_get_wm_protocols_reply_t protos = {};
 463         if (!xcb_icccm_get_wm_protocols_reply(conn, cookie, &protos, NULL))
 464                 return warn("do_client_message: %d - no reply", win);
 465
 466         /* Search for the atom */
 467         int found = 0;
 468         for (int i = 0; i < protos.atoms_len; i++)
 469                 if (protos.atoms[i] == atom)
 470                         found = 1;
 471         if (!found)
 472                 return warn("do_client_message: %d - no atom", win);
 473
 474         /* Send the message */
 475         xcb_client_message_event_t msg = {
 476                 .response_type  = XCB_CLIENT_MESSAGE,
 477                 .format         = 32,
 478                 .window         = win,
 479                 .type           = wm_protos,
 480                 .data.data32[0] = atom,
 481                 .data.data32[1] = XCB_CURRENT_TIME,
 482         };
 483         xcb_send_event(conn, 0, win, XCB_EVENT_MASK_NO_EVENT,
 484                         (const char *)&msg);
 485         return 1;
 486 }
 487
 488 /**************************
 489  * Window Manager Helpers *
 490  **************************/
 491
 492 /* Send event info */
 493 static int send_event(event_t ev, xcb_window_t ewin)
 494 {
 495         win_t *win = win_get(ewin);
 496         do_grab_pointer(0);
 497         int status = wm_handle_event(win, ev, MOD(), PTR());
 498         do_ungrab_pointer();
 499         return status;
 500 }
 501
 502 /* Send event info */
 503 static int send_event_info(event_t ev, xcb_mod_mask_t mask, int up, int16_t *pos,
 504                 xcb_window_t rwin, xcb_window_t ewin, xcb_window_t cwin)
 505 {
 506         xcb_window_t xcb = ewin == rwin ? cwin : ewin;
 507         win_t *win = win_get(xcb);
 508         mod_t  mod = mask_to_mod(mask, up);
 509         ptr_t  ptr = list_to_ptr(pos);
 510         do_grab_pointer(0);
 511         int status = wm_handle_event(win, ev, mod, ptr);
 512         do_ungrab_pointer();
 513         return status;
 514 }
 515
 516 /* Send pointer motion info */
 517 static int send_pointer(int16_t *pos,
 518                 xcb_window_t rwin, xcb_window_t ewin, xcb_window_t cwin)
 519 {
 520         xcb_window_t xcb = ewin == rwin ? cwin : ewin;
 521         win_t *win = win_get(xcb);
 522         ptr_t  ptr = list_to_ptr(pos);
 523         do_grab_pointer(0);
 524         int status = wm_handle_ptr(win, ptr);
 525         do_ungrab_pointer();
 526         return status;
 527 }
 528
 529 /* Send window state info */
 530 static void send_manage(win_t *win, int managed)
 531 {
 532         if (win->sys->managed == managed)
 533                 return;
 534         if (managed)
 535                 wm_insert(win);
 536         else
 537                 wm_remove(win);
 538         win->sys->managed = managed;
 539 }
 540
 541 /* Send window state info */
 542 static void send_state(win_t *win, state_t next)
 543 {
 544         if (!win->sys->managed)
 545                 return;
 546         if (win->state == next)
 547                 return;
 548         state_t prev = win->state;
 549         win->state = next;
 550         wm_handle_state(win, prev, next);
 551 }
 552
 553 /**********************
 554  * X11 Event Handlers *
 555  **********************/
 556
 557 /* Specific events */
 558 static void on_key_event(xcb_key_press_event_t *event, int up)
 559 {
 560         printf("on_key_event:         xcb=%-8u\n", event->event);
 561         xcb_window_t focus = do_get_input_focus();
 562         event_t ev = keycode_to_event(event->detail);
 563         send_event_info(ev, event->state, up, &event->root_x,
 564                 event->root, focus, event->child);
 565 }
 566
 567 static void on_button_event(xcb_button_press_event_t *event, int up)
 568 {
 569         printf("on_button_event:      xcb=%-8u\n", event->event);
 570         event_t ev = button_to_event(event->detail);
 571         if (!send_event_info(ev, event->state, up, &event->root_x,
 572                                 event->root, event->event, event->child))
 573                 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
 574         else if (!up)
 575                 do_grab_pointer(XCB_EVENT_MASK_POINTER_MOTION |
 576                                 XCB_EVENT_MASK_BUTTON_RELEASE);
 577         else
 578                 do_ungrab_pointer();
 579
 580 }
 581
 582 static void on_motion_notify(xcb_motion_notify_event_t *event)
 583 {
 584         printf("on_motion_notify:     xcb=%-8u - %d,%d / %d.%d\n", event->event,
 585                         event->event_x, event->event_y,
 586                         event->root_x,  event->root_y);
 587         send_pointer(&event->root_x, event->root, event->event, event->child);
 588 }
 589
 590 static void on_enter_notify(xcb_enter_notify_event_t *event)
 591 {
 592         if (event->mode != XCB_NOTIFY_MODE_NORMAL)
 593                 return;
 594         printf("on_enter_notify:      xcb=%-8u\n", event->event);
 595         send_event_info(EV_ENTER, event->state, 0, &event->root_x,
 596                 event->root, event->event, event->child);
 597 }
 598
 599 static void on_leave_notify(xcb_leave_notify_event_t *event)
 600 {
 601         if (event->mode != XCB_NOTIFY_MODE_NORMAL)
 602                 return;
 603         printf("on_leave_notify:      xcb=%-8u\n", event->event);
 604         send_event_info(EV_LEAVE, event->state, 0, &event->root_x,
 605                 event->root, event->event, event->child);
 606 }
 607
 608 static void on_focus_in(xcb_focus_in_event_t *event)
 609 {
 610         if (event->mode != XCB_NOTIFY_MODE_NORMAL &&
 611             event->mode != XCB_NOTIFY_MODE_WHILE_GRABBED)
 612                 return;
 613         printf("on_focus_in:          xcb=%-8u mode=%d\n", event->event, event->mode);
 614         xcb_change_window_attributes(conn, event->event,
 615                         XCB_CW_BORDER_PIXEL, &colors[CLR_FOCUS]);
 616         if (event->mode == XCB_NOTIFY_MODE_NORMAL)
 617                 send_event(EV_FOCUS, event->event);
 618 }
 619
 620 static void on_focus_out(xcb_focus_out_event_t *event)
 621 {
 622         if (event->mode != XCB_NOTIFY_MODE_NORMAL &&
 623             event->mode != XCB_NOTIFY_MODE_WHILE_GRABBED)
 624                 return;
 625         printf("on_focus_out:         xcb=%-8u mode=%d\n", event->event, event->mode);
 626         xcb_change_window_attributes(conn, event->event,
 627                         XCB_CW_BORDER_PIXEL, &colors[CLR_UNFOCUS]);
 628         if (event->mode == XCB_NOTIFY_MODE_NORMAL)
 629                 send_event(EV_UNFOCUS, event->event);
 630 }
 631
 632 static void on_create_notify(xcb_create_notify_event_t *event)
 633 {
 634         win_t     *win = new0(win_t);
 635         win_sys_t *sys = new0(win_sys_t);
 636
 637         printf("on_create_notify:     xcb=%-8u -> win=%p\n",
 638                         event->window, win);
 639
 640         win->x        = event->x;
 641         win->y        = event->y;
 642         win->w        = event->width;
 643         win->h        = event->height;
 644         win->sys      = sys;
 645
 646         sys->xcb      = event->window;
 647
 648         if (!event->override_redirect)
 649                 send_manage(win, 1);
 650
 651         tsearch(win, &cache, win_cmp);
 652 }
 653
 654 static void on_destroy_notify(xcb_destroy_notify_event_t *event)
 655 {
 656         win_t *win = win_get(event->window);
 657         printf("on_destroy_notify:    xcb=%-8u -> win=%p\n",
 658                         event->window, win);
 659         if (!win) return;
 660
 661         send_manage(win, 0);
 662
 663         tdelete(win, &cache, win_cmp);
 664
 665         free(win->sys);
 666         free(win);
 667 }
 668
 669 static void on_unmap_notify(xcb_unmap_notify_event_t *event)
 670 {
 671         win_t *win = win_get(event->window);
 672         printf("on_unmap_notify:      xcb=%-8u -> win=%p\n",
 673                         event->window, win);
 674         if (!win) return;
 675
 676         send_state(win, ST_HIDE);
 677 }
 678
 679 static void on_map_notify(xcb_map_notify_event_t *event)
 680 {
 681         win_t *win = win_get(event->window);
 682         printf("on_map_notify:        xcb=%-8u -> win=%p\n",
 683                         event->window, win);
 684         if (!win) return;
 685
 686         send_state(win, ST_SHOW);
 687 }
 688
 689 static void on_map_request(xcb_map_request_event_t *event)
 690 {
 691         win_t *win = win_get(event->window);
 692         printf("on_map_request:       xcb=%-8u -> win=%p\n",
 693                         event->window, win);
 694         if (!win) return;
 695
 696         if (do_get_strut(win->sys->xcb, &win->sys->strut))
 697                 printf("Map: Got a strut!\n");
 698         else
 699                 printf("Map: No struts here!\n");
 700
 701         send_state(win, ST_SHOW);
 702         xcb_map_window(conn, win->sys->xcb);
 703         sys_move(win, win->x, win->y, win->w, win->h);
 704 }
 705
 706 static void on_configure_request(xcb_configure_request_event_t *event)
 707 {
 708         win_t *win = win_get(event->window);
 709         printf("on_configure_request: xcb=%-8u -> win=%p -- %dx%d @ %d,%d\n",
 710                         event->window, win,
 711                         event->width, event->height,
 712                         event->x, event->y);
 713         if (!win) return;
 714
 715         win->x = event->x;
 716         win->y = event->y;
 717         win->w = event->width;
 718         win->h = event->height;
 719
 720         xcb_configure_notify_event_t resp = {
 721                 .response_type = XCB_CONFIGURE_NOTIFY,
 722                 .event         = win->sys->xcb,
 723                 .window        = win->sys->xcb,
 724                 .x             = win->x,
 725                 .y             = win->y,
 726                 .width         = win->w,
 727                 .height        = win->h,
 728                 .border_width  = border,
 729         };
 730
 731         xcb_send_event(conn, 0, win->sys->xcb,
 732                         XCB_EVENT_MASK_STRUCTURE_NOTIFY,
 733                         (const char *)&resp);
 734 }
 735
 736 static void on_client_message(xcb_client_message_event_t *event)
 737 {
 738         printf("on_client_message: xcb=%-8u\n", event->window);
 739         if (event->window         == control   &&
 740             event->type           == wm_protos &&
 741             event->data.data32[0] == wm_delete)
 742                 running = 0;
 743 }
 744
 745 /* Generic Event */
 746 static void on_event(xcb_generic_event_t *event)
 747 {
 748         int type = XCB_EVENT_RESPONSE_TYPE(event);
 749
 750         switch (type) {
 751                 /* Input handling */
 752                 case XCB_KEY_PRESS:
 753                         on_key_event((xcb_key_press_event_t *)event, 0);
 754                         break;
 755                 case XCB_KEY_RELEASE:
 756                         on_key_event((xcb_key_release_event_t *)event, 1);
 757                         break;
 758                 case XCB_BUTTON_PRESS:
 759                         on_button_event((xcb_button_press_event_t *)event, 0);
 760                         break;
 761                 case XCB_BUTTON_RELEASE:
 762                         on_button_event((xcb_button_release_event_t *)event, 1);
 763                         break;
 764                 case XCB_MOTION_NOTIFY:
 765                         on_motion_notify((xcb_motion_notify_event_t *)event);
 766                         break;
 767                 case XCB_ENTER_NOTIFY:
 768                         on_enter_notify((xcb_enter_notify_event_t *)event);
 769                         break;
 770                 case XCB_LEAVE_NOTIFY:
 771                         on_leave_notify((xcb_leave_notify_event_t *)event);
 772                         break;
 773                 case XCB_FOCUS_IN:
 774                         on_focus_in((xcb_focus_in_event_t *)event);
 775                         break;
 776                 case XCB_FOCUS_OUT:
 777                         on_focus_out((xcb_focus_out_event_t *)event);
 778                         break;
 779
 780                 /* Window management */
 781                 case XCB_CREATE_NOTIFY:
 782                         on_create_notify((xcb_create_notify_event_t *)event);
 783                         break;
 784                 case XCB_DESTROY_NOTIFY:
 785                         on_destroy_notify((xcb_destroy_notify_event_t *)event);
 786                         break;
 787                 case XCB_UNMAP_NOTIFY:
 788                         on_unmap_notify((xcb_unmap_notify_event_t *)event);
 789                         break;
 790                 case XCB_MAP_NOTIFY:
 791                         on_map_notify((xcb_map_notify_event_t *)event);
 792                         break;
 793                 case XCB_MAP_REQUEST:
 794                         on_map_request((xcb_map_request_event_t *)event);
 795                         break;
 796                 case XCB_CONFIGURE_REQUEST:
 797                         on_configure_request((xcb_configure_request_event_t *)event);
 798                         break;
 799                 case XCB_CLIENT_MESSAGE:
 800                         on_client_message((xcb_client_message_event_t *)event);
 801                         break;
 802
 803                 /* Unknown events */
 804                 default:
 805                         printf("on_event: %d:%02X -> %s\n",
 806                                 XCB_EVENT_SENT(event) != 0,
 807                                 XCB_EVENT_RESPONSE_TYPE(event),
 808                                 xcb_event_get_label(type) ?: "unknown_event");
 809                         break;
 810         }
 811 }
 812
 813 /********************
 814  * System functions *
 815  ********************/
 816
 817 void sys_move(win_t *win, int x, int y, int w, int h)
 818 {
 819         printf("sys_move:  %p - %dx%d @ %d,%d\n",
 820                         win, w, h, x, y);
 821
 822         int b = 2*border;
 823
 824         win->x = x;
 825         win->y = y;
 826         win->w = MAX(w,1+b);
 827         win->h = MAX(h,1+b);
 828         w      = MAX(w-b,1);
 829         h      = MAX(h-b,1);
 830
 831         do_configure_window(win->sys->xcb, x, y, w, h, -1, -1, -1);
 832 }
 833
 834 void sys_raise(win_t *win)
 835 {
 836         printf("sys_raise: %p\n", win);
 837
 838         uint16_t mask = XCB_CONFIG_WINDOW_STACK_MODE;
 839         uint32_t list = XCB_STACK_MODE_ABOVE;
 840
 841         xcb_configure_window(conn, win->sys->xcb, mask, &list);
 842 }
 843
 844 void sys_focus(win_t *win)
 845 {
 846         printf("sys_focus: %p\n", win);
 847         xcb_window_t xcb = win ? win->sys->xcb : root;
 848
 849         xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT,
 850                         xcb, XCB_CURRENT_TIME);
 851 }
 852
 853 void sys_show(win_t *win, state_t state)
 854 {
 855         printf("sys_show:  %p - %s -> %s\n", win,
 856                         state_map[win->state], state_map[state]);
 857         xcb_window_t xcb = win ? win->sys->xcb : root;
 858
 859         /* Find screen */
 860         win_t *screen = NULL;
 861         if (state == ST_FULL || state == ST_MAX) {
 862                 for (list_t *cur = screens; cur; cur = cur->next) {
 863                         screen = cur->data;
 864                         if (win->x >= screen->x && win->x <= screen->x+screen->w &&
 865                             win->y >= screen->y && win->y <= screen->y+screen->h)
 866                                 break;
 867                 }
 868         }
 869
 870         /* Change window state */
 871         switch (state) {
 872                 case ST_HIDE:
 873                         xcb_unmap_window(conn, xcb);
 874                         break;
 875
 876                 case ST_SHOW:
 877                         xcb_map_window(conn, xcb);
 878                         do_configure_window(xcb, win->x, win->y,
 879                                         MAX(win->w - 2*border, 1),
 880                                         MAX(win->h - 2*border, 1),
 881                                         border, -1, -1);
 882                         break;
 883
 884                 case ST_FULL:
 885                         xcb_map_window(conn, xcb);
 886                         do_configure_window(xcb, screen->x, screen->y, screen->w, screen->h,
 887                                         0, -1, XCB_STACK_MODE_ABOVE);
 888                         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, xcb);
 889                         break;
 890
 891                 case ST_MAX:
 892                         xcb_map_window(conn, xcb);
 893                         do_configure_window(xcb, screen->x, screen->y,
 894                                         MAX(screen->w - 2*border, 1),
 895                                         MAX(screen->h - 2*border, 1),
 896                                         border, -1, XCB_STACK_MODE_ABOVE);
 897                         break;
 898
 899                 case ST_SHADE:
 900                         xcb_map_window(conn, xcb);
 901                         do_configure_window(xcb, -1, -1, -1, stack,
 902                                         border, -1, -1);
 903                         break;
 904
 905                 case ST_ICON:
 906                         xcb_map_window(conn, xcb);
 907                         do_configure_window(xcb, -1, -1, 100, 100,
 908                                         border, -1, -1);
 909                         break;
 910
 911                 case ST_CLOSE:
 912                         if (!do_client_message(xcb, wm_delete))
 913                                 xcb_kill_client(conn, xcb);
 914                         break;
 915         }
 916
 917         /* Update state */
 918         win->state = state;
 919 }
 920
 921 void sys_watch(win_t *win, event_t ev, mod_t mod)
 922 {
 923         printf("sys_watch: %p - 0x%X,0x%X\n", win, ev, mod2int(mod));
 924         xcb_window_t      xcb  = win ? win->sys->xcb     : root;
 925         xcb_event_mask_t *mask = win ? &win->sys->events : &events;
 926         xcb_mod_mask_t    mods = 0;
 927         xcb_button_t      btn  = 0;
 928         xcb_keycode_t    *code = 0;
 929
 930         switch (ev) {
 931                 case EV_ENTER:
 932                         *mask |= XCB_EVENT_MASK_ENTER_WINDOW;
 933                         xcb_change_window_attributes(conn, xcb, XCB_CW_EVENT_MASK, mask);
 934                         break;
 935
 936                 case EV_LEAVE:
 937                         *mask |= XCB_EVENT_MASK_LEAVE_WINDOW;
 938                         xcb_change_window_attributes(conn, xcb, XCB_CW_EVENT_MASK, mask);
 939                         break;
 940
 941                 case EV_FOCUS:
 942                 case EV_UNFOCUS:
 943                         *mask |= XCB_EVENT_MASK_FOCUS_CHANGE;
 944                         xcb_change_window_attributes(conn, xcb, XCB_CW_EVENT_MASK, mask);
 945                         break;
 946
 947                 case EV_MOUSE0...EV_MOUSE7:
 948                         btn    = event_to_button(ev);
 949                         mods   = mod_to_mask(mod);
 950                         *mask |= mod.up ? XCB_EVENT_MASK_BUTTON_RELEASE
 951                                         : XCB_EVENT_MASK_BUTTON_PRESS;
 952                         xcb_grab_button(conn, 0, xcb, *mask,
 953                                         XCB_GRAB_MODE_ASYNC,
 954                                         XCB_GRAB_MODE_ASYNC,
 955                                         0, 0, btn, mods);
 956                         break;
 957
 958                 default:
 959                         code = event_to_keycodes(ev);
 960                         mods = mod_to_mask(mod);
 961                         for (int i = 0; code && code[i] != XCB_NO_SYMBOL; i++)
 962                                 xcb_grab_key(conn, 1, xcb, mods, code[i],
 963                                                 XCB_GRAB_MODE_ASYNC,
 964                                                 XCB_GRAB_MODE_ASYNC);
 965
 966                         break;
 967         }
 968 }
 969
 970 void sys_unwatch(win_t *win, event_t ev, mod_t mod)
 971 {
 972         printf("sys_unwatch: %p - 0x%X,0x%X\n", win, ev, mod2int(mod));
 973 }
 974
 975 list_t *sys_info(void)
 976 {
 977         printf("sys_info\n");
 978
 979         if (screens == NULL && do_xinerama_check()) {
 980                 /* Add Xinerama screens */
 981                 xcb_xinerama_screen_info_t *info = NULL;
 982                 int ninfo = do_query_screens(&info);
 983                 for (int i = 0; i < ninfo; i++) {
 984                         win_t *screen = new0(win_t);
 985
 986                         screen->x = info[i].x_org;
 987                         screen->y = info[i].y_org;
 988                         screen->w = info[i].width;
 989                         screen->h = info[i].height;
 990
 991                         screens = list_insert(NULL, screen);
 992
 993                         printf("sys_info: xinerama screen - %dx%d @ %d,%d\n",
 994                                         screen->w, screen->h,
 995                                         screen->x, screen->y);
 996                 }
 997         }
 998
 999         if (screens == NULL) {
1000                 /* No xinerama support */
1001                 const xcb_setup_t *setup = xcb_get_setup(conn);
1002                 xcb_screen_t      *geom  = xcb_setup_roots_iterator(setup).data;
1003
1004                 win_t *screen = new0(win_t);
1005
1006                 screen->w = geom->width_in_pixels;
1007                 screen->h = geom->height_in_pixels;
1008
1009                 screens = list_insert(NULL, screen);
1010
1011                 printf("sys_info: root screen - %dx%d\n",
1012                                 screen->w, screen->h);
1013         }
1014
1015         return screens;
1016 }
1017
1018 void sys_init(void)
1019 {
1020         printf("sys_init\n");
1021
1022         xcb_void_cookie_t cookie;
1023         xcb_generic_error_t *err;
1024
1025         /* Load configuration */
1026         stack      = conf_get_int("main.stack",      stack);
1027         border     = conf_get_int("main.border",     border);
1028         no_capture = conf_get_int("main.no-capture", no_capture);
1029
1030         /* Connect to display */
1031         if (!(conn = xcb_connect(NULL, NULL)))
1032                 error("xcb connect failed");
1033         if (xcb_connection_has_error(conn))
1034                 error("xcb connection has errors");
1035
1036         /* Get root window */
1037         const xcb_setup_t     *setup = xcb_get_setup(conn);
1038         xcb_screen_iterator_t  iter  = xcb_setup_roots_iterator(setup);
1039         root     = iter.data->root;
1040         colormap = iter.data->default_colormap;
1041
1042         /* Request substructure redirect */
1043         events = XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
1044                  XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY;
1045         cookie = xcb_change_window_attributes_checked(conn, root,
1046                         XCB_CW_EVENT_MASK, &events);
1047         if ((err = xcb_request_check(conn, cookie)))
1048                 error("another window manager is already running");
1049
1050         /* Setup X Atoms */
1051         wm_protos = do_intern_atom("WM_PROTOCOLS");
1052         wm_delete = do_intern_atom("WM_DELETE_WINDOW");
1053         if (!wm_protos || !wm_delete)
1054                 error("unable to setup atoms");
1055
1056         /* Setup EWMH connection */
1057         if (!do_ewmh_init_atoms())
1058                 error("ewmh setup failed");
1059
1060         /* Set EWMH wm window */
1061         control = xcb_generate_id(conn);
1062         cookie  = xcb_create_window_checked(conn, 0, control, root,
1063                         0, 0, 1, 1, 0, 0, 0, 0, NULL);
1064         if ((err = xcb_request_check(conn, cookie)))
1065                 error("can't create control window");
1066         cookie = xcb_ewmh_set_wm_name_checked(&ewmh, control, 5, "wmpus");
1067         if ((err = xcb_request_check(conn, cookie)))
1068                 error("can't set wm name");
1069         cookie = xcb_ewmh_set_supporting_wm_check_checked(&ewmh, root, control);
1070         if ((err = xcb_request_check(conn, cookie)))
1071                 error("can't set control window");
1072
1073         /* Setup for for ST_CLOSE */
1074         xcb_set_close_down_mode(conn, XCB_CLOSE_DOWN_DESTROY_ALL);
1075
1076         /* Allocate key symbols */
1077         if (!(keysyms = xcb_key_symbols_alloc(conn)))
1078                 error("cannot allocate key symbols");
1079
1080         /* Read color information */
1081         colors[CLR_FOCUS]   = do_alloc_color(0xFF6060);
1082         colors[CLR_UNFOCUS] = do_alloc_color(0xD8D8FF);
1083         colors[CLR_URGENT]  = do_alloc_color(0xFF0000);
1084 }
1085
1086 void sys_run(void)
1087 {
1088         printf("sys_run\n");
1089
1090         /* Add each initial window */
1091         if (!no_capture) {
1092                 xcb_window_t *kids = NULL;
1093                 int nkids = do_query_tree(root, &kids);
1094                 for(int i = 0; i < nkids; i++) {
1095                         int override=0, mapped=0;
1096                         win_t *win = new0(win_t);
1097                         win->sys = new0(win_sys_t);
1098                         win->sys->xcb = kids[i];
1099                         tsearch(win, &cache, win_cmp);
1100                         do_get_geometry(kids[i], &win->x, &win->y, &win->w, &win->h);
1101                         do_get_window_attributes(kids[i], &override, &mapped);
1102                         if (!override)
1103                                 send_manage(win, 1);
1104                         if (mapped)
1105                                 send_state(win, ST_SHOW);
1106                 }
1107                 xcb_flush(conn);
1108         }
1109
1110         /* Main loop */
1111         running = 1;
1112         while (running)
1113         {
1114                 int status;
1115                 xcb_generic_event_t *event;
1116                 if (!(event = xcb_wait_for_event(conn)))
1117                         break;
1118                 on_event(event);
1119                 free(event);
1120                 if (!(status = xcb_flush(conn)))
1121                         break;
1122         }
1123 }
1124
1125 void sys_exit(void)
1126 {
1127         printf("sys_exit\n");
1128
1129         xcb_client_message_event_t msg = {
1130                 .response_type  = XCB_CLIENT_MESSAGE,
1131                 .format         = 32,
1132                 .window         = control,
1133                 .type           = wm_protos,
1134                 .data.data32[0] = wm_delete,
1135                 .data.data32[1] = XCB_CURRENT_TIME,
1136         };
1137         xcb_send_event(conn, 0, control, XCB_EVENT_MASK_NO_EVENT,
1138                         (const char *)&msg);
1139         xcb_flush(conn);
1140 }
1141
1142 void sys_free(void)
1143 {
1144         printf("sys_free\n");
1145
1146         xcb_void_cookie_t cookie;
1147         xcb_generic_error_t *err;
1148
1149         cookie = xcb_delete_property_checked(conn, root,
1150                         ewmh._NET_SUPPORTING_WM_CHECK);
1151         if ((err = xcb_request_check(conn, cookie)))
1152                 warn("can't remove control window");
1153
1154         cookie = xcb_destroy_window_checked(conn, control);
1155         if ((err = xcb_request_check(conn, cookie)))
1156                 warn("can't destroy control window");
1157
1158         xcb_ewmh_connection_wipe(&ewmh);
1159         xcb_disconnect(conn);
1160 }