git.sur5r.net Git - i3/i3/blob - i3bar/src/xcb.c

   1 /*
   2  * vim:ts=4:sw=4:expandtab
   3  *
   4  * i3bar - an xcb-based status- and ws-bar for i3
   5  * © 2010-2012 Axel Wagner and contributors (see also: LICENSE)
   6  *
   7  * xcb.c: Communicating with X
   8  *
   9  */
  10 #include <xcb/xcb.h>
  11 #include <xcb/xproto.h>
  12 #include <xcb/xcb_atom.h>
  13 #include <xcb/xcb_aux.h>
  14
  15 #ifdef XCB_COMPAT
  16 #include "xcb_compat.h"
  17 #endif
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <fcntl.h>
  23 #include <string.h>
  24 #include <i3/ipc.h>
  25 #include <ev.h>
  26 #include <errno.h>
  27 #include <limits.h>
  28 #include <err.h>
  29
  30 #include <X11/Xlib.h>
  31 #include <X11/XKBlib.h>
  32 #include <X11/extensions/XKB.h>
  33
  34 #include "common.h"
  35 #include "libi3.h"
  36
  37 /* We save the Atoms in an easy to access array, indexed by an enum */
  38 enum {
  39     #define ATOM_DO(name) name,
  40     #include "xcb_atoms.def"
  41     NUM_ATOMS
  42 };
  43
  44 xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
  45 xcb_atom_t               atoms[NUM_ATOMS];
  46
  47 /* Variables, that are the same for all functions at all times */
  48 xcb_connection_t *xcb_connection;
  49 int              screen;
  50 xcb_screen_t     *root_screen;
  51 xcb_window_t     xcb_root;
  52
  53 /* This is needed for integration with libi3 */
  54 xcb_connection_t *conn;
  55
  56 /* The font we'll use */
  57 static i3Font font;
  58
  59 /* These are only relevant for XKB, which we only need for grabbing modifiers */
  60 Display          *xkb_dpy;
  61 int              xkb_event_base;
  62 int              mod_pressed = 0;
  63
  64 /* Because the statusline is the same on all outputs, we have
  65  * global buffer to render it on */
  66 xcb_gcontext_t   statusline_ctx;
  67 xcb_gcontext_t   statusline_clear;
  68 xcb_pixmap_t     statusline_pm;
  69 uint32_t         statusline_width;
  70
  71 /* Event-Watchers, to interact with the user */
  72 ev_prepare *xcb_prep;
  73 ev_check   *xcb_chk;
  74 ev_io      *xcb_io;
  75 ev_io      *xkb_io;
  76
  77 /* The name of current binding mode */
  78 static mode binding;
  79
  80 /* The parsed colors */
  81 struct xcb_colors_t {
  82     uint32_t bar_fg;
  83     uint32_t bar_bg;
  84     uint32_t active_ws_fg;
  85     uint32_t active_ws_bg;
  86     uint32_t active_ws_border;
  87     uint32_t inactive_ws_fg;
  88     uint32_t inactive_ws_bg;
  89     uint32_t inactive_ws_border;
  90     uint32_t urgent_ws_bg;
  91     uint32_t urgent_ws_fg;
  92     uint32_t urgent_ws_border;
  93     uint32_t focus_ws_bg;
  94     uint32_t focus_ws_fg;
  95     uint32_t focus_ws_border;
  96 };
  97 struct xcb_colors_t colors;
  98
  99 /* We define xcb_request_failed as a macro to include the relevant line-number */
 100 #define xcb_request_failed(cookie, err_msg) _xcb_request_failed(cookie, err_msg, __LINE__)
 101 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
 102     xcb_generic_error_t *err;
 103     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
 104         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
 105         return err->error_code;
 106     }
 107     return 0;
 108 }
 109
 110 /*
 111  * Redraws the statusline to the buffer
 112  *
 113  */
 114 void refresh_statusline(void) {
 115     struct status_block *block;
 116
 117     uint32_t old_statusline_width = statusline_width;
 118     statusline_width = 0;
 119
 120     /* Predict the text width of all blocks (in pixels). */
 121     TAILQ_FOREACH(block, &statusline_head, blocks) {
 122         if (i3string_get_num_bytes(block->full_text) == 0)
 123             continue;
 124
 125         block->width = predict_text_width(block->full_text);
 126
 127         /* Compute offset and append for text aligment in min_width. */
 128         if (block->min_width <= block->width) {
 129             block->x_offset = 0;
 130             block->x_append = 0;
 131         } else {
 132             uint32_t padding_width = block->min_width - block->width;
 133             switch (block->align) {
 134                 case ALIGN_LEFT:
 135                     block->x_append = padding_width;
 136                     break;
 137                 case ALIGN_RIGHT:
 138                     block->x_offset = padding_width;
 139                     break;
 140                 case ALIGN_CENTER:
 141                     block->x_offset = padding_width / 2;
 142                     block->x_append = padding_width / 2 + padding_width % 2;
 143                     break;
 144             }
 145         }
 146
 147         /* If this is not the last block, add some pixels for a separator. */
 148         if (TAILQ_NEXT(block, blocks) != NULL)
 149             block->width += 9;
 150         statusline_width += block->width + block->x_offset + block->x_append;
 151     }
 152
 153     /* If the statusline is bigger than our screen we need to make sure that
 154      * the pixmap provides enough space, so re-allocate if the width grew */
 155     if (statusline_width > root_screen->width_in_pixels &&
 156         statusline_width > old_statusline_width)
 157         realloc_sl_buffer();
 158
 159     /* Clear the statusline pixmap. */
 160     xcb_rectangle_t rect = { 0, 0, root_screen->width_in_pixels, font.height };
 161     xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_clear, 1, &rect);
 162
 163     /* Draw the text of each block. */
 164     uint32_t x = 0;
 165     TAILQ_FOREACH(block, &statusline_head, blocks) {
 166         if (i3string_get_num_bytes(block->full_text) == 0)
 167             continue;
 168
 169         uint32_t colorpixel = (block->color ? get_colorpixel(block->color) : colors.bar_fg);
 170         set_font_colors(statusline_ctx, colorpixel, colors.bar_bg);
 171         draw_text(block->full_text, statusline_pm, statusline_ctx, x + block->x_offset, 0, block->width);
 172         x += block->width + block->x_offset + block->x_append;
 173
 174         if (TAILQ_NEXT(block, blocks) != NULL) {
 175             /* This is not the last block, draw a separator. */
 176             set_font_colors(statusline_ctx, get_colorpixel("#666666"), colors.bar_bg);
 177             xcb_poly_line(xcb_connection, XCB_COORD_MODE_ORIGIN, statusline_pm,
 178                           statusline_ctx, 2,
 179                           (xcb_point_t[]){ { x - 5, 2 }, { x - 5, font.height - 2 } });
 180         }
 181     }
 182 }
 183
 184 /*
 185  * Hides all bars (unmaps them)
 186  *
 187  */
 188 void hide_bars(void) {
 189     if (!config.hide_on_modifier) {
 190         return;
 191     }
 192
 193     i3_output *walk;
 194     SLIST_FOREACH(walk, outputs, slist) {
 195         if (!walk->active) {
 196             continue;
 197         }
 198         xcb_unmap_window(xcb_connection, walk->bar);
 199     }
 200     stop_child();
 201 }
 202
 203 /*
 204  * Unhides all bars (maps them)
 205  *
 206  */
 207 void unhide_bars(void) {
 208     if (!config.hide_on_modifier) {
 209         return;
 210     }
 211
 212     i3_output           *walk;
 213     xcb_void_cookie_t   cookie;
 214     uint32_t            mask;
 215     uint32_t            values[5];
 216
 217     cont_child();
 218
 219     SLIST_FOREACH(walk, outputs, slist) {
 220         if (walk->bar == XCB_NONE) {
 221             continue;
 222         }
 223         mask = XCB_CONFIG_WINDOW_X |
 224                XCB_CONFIG_WINDOW_Y |
 225                XCB_CONFIG_WINDOW_WIDTH |
 226                XCB_CONFIG_WINDOW_HEIGHT |
 227                XCB_CONFIG_WINDOW_STACK_MODE;
 228         values[0] = walk->rect.x;
 229         if (config.position == POS_TOP)
 230             values[1] = walk->rect.y;
 231         else values[1] = walk->rect.y + walk->rect.h - font.height - 6;
 232         values[2] = walk->rect.w;
 233         values[3] = font.height + 6;
 234         values[4] = XCB_STACK_MODE_ABOVE;
 235         DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 236         cookie = xcb_configure_window_checked(xcb_connection,
 237                                               walk->bar,
 238                                               mask,
 239                                               values);
 240
 241         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 242             exit(EXIT_FAILURE);
 243         }
 244         xcb_map_window(xcb_connection, walk->bar);
 245     }
 246 }
 247
 248 /*
 249  * Parse the colors into a format that we can use
 250  *
 251  */
 252 void init_colors(const struct xcb_color_strings_t *new_colors) {
 253 #define PARSE_COLOR(name, def) \
 254     do { \
 255         colors.name = get_colorpixel(new_colors->name ? new_colors->name : def); \
 256     } while  (0)
 257     PARSE_COLOR(bar_fg, "#FFFFFF");
 258     PARSE_COLOR(bar_bg, "#000000");
 259     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 260     PARSE_COLOR(active_ws_bg, "#333333");
 261     PARSE_COLOR(active_ws_border, "#333333");
 262     PARSE_COLOR(inactive_ws_fg, "#888888");
 263     PARSE_COLOR(inactive_ws_bg, "#222222");
 264     PARSE_COLOR(inactive_ws_border, "#333333");
 265     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 266     PARSE_COLOR(urgent_ws_bg, "#900000");
 267     PARSE_COLOR(urgent_ws_border, "#2f343a");
 268     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 269     PARSE_COLOR(focus_ws_bg, "#285577");
 270     PARSE_COLOR(focus_ws_border, "#4c7899");
 271 #undef PARSE_COLOR
 272 }
 273
 274 /*
 275  * Handle a button-press-event (i.e. a mouse click on one of our bars).
 276  * We determine, whether the click occured on a ws-button or if the scroll-
 277  * wheel was used and change the workspace appropriately
 278  *
 279  */
 280 void handle_button(xcb_button_press_event_t *event) {
 281     i3_ws *cur_ws;
 282
 283     /* Determine, which bar was clicked */
 284     i3_output *walk;
 285     xcb_window_t bar = event->event;
 286     SLIST_FOREACH(walk, outputs, slist) {
 287         if (walk->bar == bar) {
 288             break;
 289         }
 290     }
 291
 292     if (walk == NULL) {
 293         DLOG("Unknown Bar klicked!\n");
 294         return;
 295     }
 296
 297     /* TODO: Move this to extern get_ws_for_output() */
 298     TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 299         if (cur_ws->visible) {
 300             break;
 301         }
 302     }
 303
 304     if (cur_ws == NULL) {
 305         DLOG("No Workspace active?\n");
 306         return;
 307     }
 308
 309     int32_t x = event->event_x >= 0 ? event->event_x : 0;
 310
 311     DLOG("Got Button %d\n", event->detail);
 312
 313     switch (event->detail) {
 314         case 1:
 315             /* Left Mousbutton. We determine, which button was clicked
 316              * and set cur_ws accordingly */
 317             TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 318                 DLOG("x = %d\n", x);
 319                 if (x >= 0 && x < cur_ws->name_width + 10) {
 320                     break;
 321                 }
 322                 x -= cur_ws->name_width + 11;
 323             }
 324             if (cur_ws == NULL) {
 325                 return;
 326             }
 327             break;
 328         case 4:
 329             /* Mouse wheel up. We select the previous ws, if any.
 330              * If there is no more workspace, don’t even send the workspace
 331              * command, otherwise (with workspace auto_back_and_forth) we’d end
 332              * up on the wrong workspace. */
 333             if (cur_ws == TAILQ_FIRST(walk->workspaces))
 334                 return;
 335
 336             cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 337             break;
 338         case 5:
 339             /* Mouse wheel down. We select the next ws, if any.
 340              * If there is no more workspace, don’t even send the workspace
 341              * command, otherwise (with workspace auto_back_and_forth) we’d end
 342              * up on the wrong workspace. */
 343             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
 344                 return;
 345
 346             cur_ws = TAILQ_NEXT(cur_ws, tailq);
 347             break;
 348     }
 349
 350     /* To properly handle workspace names with double quotes in them, we need
 351      * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
 352      * first count the number of double quotes, then we allocate a large enough
 353      * buffer, then we copy character by character. */
 354     int num_quotes = 0;
 355     size_t namelen = 0;
 356     const char *utf8_name = i3string_as_utf8(cur_ws->name);
 357     for (const char *walk = utf8_name; *walk != '\0'; walk++) {
 358         if (*walk == '"')
 359             num_quotes++;
 360         /* While we’re looping through the name anyway, we can save one
 361          * strlen(). */
 362         namelen++;
 363     }
 364
 365     const size_t len = namelen + strlen("workspace \"\"") + 1;
 366     char *buffer = scalloc(len+num_quotes);
 367     strncpy(buffer, "workspace \"", strlen("workspace \""));
 368     int inpos, outpos;
 369     for (inpos = 0, outpos = strlen("workspace \"");
 370          inpos < namelen;
 371          inpos++, outpos++) {
 372         if (utf8_name[inpos] == '"') {
 373             buffer[outpos] = '\\';
 374             outpos++;
 375         }
 376         buffer[outpos] = utf8_name[inpos];
 377     }
 378     buffer[outpos] = '"';
 379     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 380     free(buffer);
 381 }
 382
 383 /*
 384  * Configures the x coordinate of all trayclients. To be called after adding a
 385  * new tray client or removing an old one.
 386  *
 387  */
 388 static void configure_trayclients(void) {
 389     trayclient *trayclient;
 390     i3_output *output;
 391     SLIST_FOREACH(output, outputs, slist) {
 392         if (!output->active)
 393             continue;
 394
 395         int clients = 0;
 396         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 397             if (!trayclient->mapped)
 398                 continue;
 399             clients++;
 400
 401             DLOG("Configuring tray window %08x to x=%d\n",
 402                  trayclient->win, output->rect.w - (clients * (font.height + 2)));
 403             uint32_t x = output->rect.w - (clients * (font.height + 2));
 404             xcb_configure_window(xcb_connection,
 405                                  trayclient->win,
 406                                  XCB_CONFIG_WINDOW_X,
 407                                  &x);
 408         }
 409     }
 410 }
 411
 412 /*
 413  * Handles ClientMessages (messages sent from another client directly to us).
 414  *
 415  * At the moment, only the tray window will receive client messages. All
 416  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 417  *
 418  */
 419 static void handle_client_message(xcb_client_message_event_t* event) {
 420     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 421         event->format == 32) {
 422         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 423         /* event->data.data32[0] is the timestamp */
 424         uint32_t op = event->data.data32[1];
 425         uint32_t mask;
 426         uint32_t values[2];
 427         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 428             xcb_window_t client = event->data.data32[2];
 429
 430             /* Listen for PropertyNotify events to get the most recent value of
 431              * the XEMBED_MAPPED atom, also listen for UnmapNotify events */
 432             mask = XCB_CW_EVENT_MASK;
 433             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE |
 434                         XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 435             xcb_change_window_attributes(xcb_connection,
 436                                          client,
 437                                          mask,
 438                                          values);
 439
 440             /* Request the _XEMBED_INFO property. The XEMBED specification
 441              * (which is referred by the tray specification) says this *has* to
 442              * be set, but VLC does not set it… */
 443             bool map_it = true;
 444             int xe_version = 1;
 445             xcb_get_property_cookie_t xembedc;
 446             xcb_generic_error_t *error;
 447             xembedc = xcb_get_property(xcb_connection,
 448                                        0,
 449                                        client,
 450                                        atoms[_XEMBED_INFO],
 451                                        XCB_GET_PROPERTY_TYPE_ANY,
 452                                        0,
 453                                        2 * 32);
 454
 455             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 456                                                                        xembedc,
 457                                                                        &error);
 458             if (error != NULL) {
 459                 ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
 460                      error->error_code);
 461                 free(error);
 462                 return;
 463             }
 464             if (xembedr != NULL && xembedr->length != 0) {
 465                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 466                 uint32_t *xembed = xcb_get_property_value(xembedr);
 467                 DLOG("xembed version = %d\n", xembed[0]);
 468                 DLOG("xembed flags = %d\n", xembed[1]);
 469                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 470                 xe_version = xembed[0];
 471                 if (xe_version > 1)
 472                     xe_version = 1;
 473                 free(xembedr);
 474             } else {
 475                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 476             }
 477
 478             DLOG("X window %08x requested docking\n", client);
 479             i3_output *walk, *output = NULL;
 480             SLIST_FOREACH(walk, outputs, slist) {
 481                 if (!walk->active)
 482                     continue;
 483                 if (config.tray_output) {
 484                     if ((strcasecmp(walk->name, config.tray_output) != 0) &&
 485                         (!walk->primary || strcasecmp("primary", config.tray_output) != 0))
 486                         continue;
 487                 }
 488
 489                 DLOG("using output %s\n", walk->name);
 490                 output = walk;
 491                 break;
 492             }
 493             /* In case of tray_output == primary and there is no primary output
 494              * configured, we fall back to the first available output. */
 495             if (output == NULL && strcasecmp("primary", config.tray_output) == 0) {
 496                 SLIST_FOREACH(walk, outputs, slist) {
 497                     if (!walk->active)
 498                         continue;
 499                     DLOG("Falling back to output %s because no primary output is configured\n", walk->name);
 500                     output = walk;
 501                     break;
 502                 }
 503             }
 504             if (output == NULL) {
 505                 ELOG("No output found\n");
 506                 return;
 507             }
 508             xcb_reparent_window(xcb_connection,
 509                                 client,
 510                                 output->bar,
 511                                 output->rect.w - font.height - 2,
 512                                 2);
 513             /* We reconfigure the window to use a reasonable size. The systray
 514              * specification explicitly says:
 515              *   Tray icons may be assigned any size by the system tray, and
 516              *   should do their best to cope with any size effectively
 517              */
 518             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 519             values[0] = font.height;
 520             values[1] = font.height;
 521             xcb_configure_window(xcb_connection,
 522                                  client,
 523                                  mask,
 524                                  values);
 525
 526             /* send the XEMBED_EMBEDDED_NOTIFY message */
 527             void *event = scalloc(32);
 528             xcb_client_message_event_t *ev = event;
 529             ev->response_type = XCB_CLIENT_MESSAGE;
 530             ev->window = client;
 531             ev->type = atoms[_XEMBED];
 532             ev->format = 32;
 533             ev->data.data32[0] = XCB_CURRENT_TIME;
 534             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 535             ev->data.data32[2] = output->bar;
 536             ev->data.data32[3] = xe_version;
 537             xcb_send_event(xcb_connection,
 538                            0,
 539                            client,
 540                            XCB_EVENT_MASK_NO_EVENT,
 541                            (char*)ev);
 542             free(event);
 543
 544             /* Put the client inside the save set. Upon termination (whether
 545              * killed or normal exit does not matter) of i3bar, these clients
 546              * will be correctly reparented to their most closest living
 547              * ancestor. Without this, tray icons might die when i3bar
 548              * exits/crashes. */
 549             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 550
 551             if (map_it) {
 552                 DLOG("Mapping dock client\n");
 553                 xcb_map_window(xcb_connection, client);
 554             } else {
 555                 DLOG("Not mapping dock client yet\n");
 556             }
 557             trayclient *tc = smalloc(sizeof(trayclient));
 558             tc->win = client;
 559             tc->mapped = map_it;
 560             tc->xe_version = xe_version;
 561             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 562
 563             /* Trigger an update to copy the statusline text to the appropriate
 564              * position */
 565             configure_trayclients();
 566             draw_bars(false);
 567         }
 568     }
 569 }
 570
 571 /*
 572  * Handles UnmapNotify events. These events happen when a tray window unmaps
 573  * itself. We then update our data structure
 574  *
 575  */
 576 static void handle_unmap_notify(xcb_unmap_notify_event_t* event) {
 577     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 578
 579     i3_output *walk;
 580     SLIST_FOREACH(walk, outputs, slist) {
 581         if (!walk->active)
 582             continue;
 583         DLOG("checking output %s\n", walk->name);
 584         trayclient *trayclient;
 585         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 586             if (trayclient->win != event->window)
 587                 continue;
 588
 589             DLOG("Removing tray client with window ID %08x\n", event->window);
 590             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 591
 592             /* Trigger an update, we now have more space for the statusline */
 593             configure_trayclients();
 594             draw_bars(false);
 595             return;
 596         }
 597     }
 598 }
 599
 600 /*
 601  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 602  * handled, which tells us whether a dock client should be mapped or unmapped.
 603  *
 604  */
 605 static void handle_property_notify(xcb_property_notify_event_t *event) {
 606     DLOG("PropertyNotify\n");
 607     if (event->atom == atoms[_XEMBED_INFO] &&
 608         event->state == XCB_PROPERTY_NEW_VALUE) {
 609         DLOG("xembed_info updated\n");
 610         trayclient *trayclient = NULL, *walk;
 611         i3_output *o_walk;
 612         SLIST_FOREACH(o_walk, outputs, slist) {
 613             if (!o_walk->active)
 614                 continue;
 615
 616             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 617                 if (walk->win != event->window)
 618                     continue;
 619                 trayclient = walk;
 620                 break;
 621             }
 622
 623             if (trayclient)
 624                 break;
 625         }
 626         if (!trayclient) {
 627             ELOG("PropertyNotify received for unknown window %08x\n",
 628                  event->window);
 629             return;
 630         }
 631         xcb_get_property_cookie_t xembedc;
 632         xembedc = xcb_get_property_unchecked(xcb_connection,
 633                                              0,
 634                                              trayclient->win,
 635                                              atoms[_XEMBED_INFO],
 636                                              XCB_GET_PROPERTY_TYPE_ANY,
 637                                              0,
 638                                              2 * 32);
 639
 640         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 641                                                                    xembedc,
 642                                                                    NULL);
 643         if (xembedr == NULL || xembedr->length == 0) {
 644             DLOG("xembed_info unset\n");
 645             return;
 646         }
 647
 648         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 649         uint32_t *xembed = xcb_get_property_value(xembedr);
 650         DLOG("xembed version = %d\n", xembed[0]);
 651         DLOG("xembed flags = %d\n", xembed[1]);
 652         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 653         DLOG("map-state now %d\n", map_it);
 654         if (trayclient->mapped && !map_it) {
 655             /* need to unmap the window */
 656             xcb_unmap_window(xcb_connection, trayclient->win);
 657             trayclient->mapped = map_it;
 658             configure_trayclients();
 659             draw_bars(false);
 660         } else if (!trayclient->mapped && map_it) {
 661             /* need to map the window */
 662             xcb_map_window(xcb_connection, trayclient->win);
 663             trayclient->mapped = map_it;
 664             configure_trayclients();
 665             draw_bars(false);
 666         }
 667         free(xembedr);
 668     }
 669 }
 670
 671 /*
 672  * Handle ConfigureRequests by denying them and sending the client a
 673  * ConfigureNotify with its actual size.
 674  *
 675  */
 676 static void handle_configure_request(xcb_configure_request_event_t *event) {
 677     DLOG("ConfigureRequest for window = %08x\n", event->window);
 678
 679     trayclient *trayclient;
 680     i3_output *output;
 681     SLIST_FOREACH(output, outputs, slist) {
 682         if (!output->active)
 683             continue;
 684
 685         int clients = 0;
 686         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 687             if (!trayclient->mapped)
 688                 continue;
 689             clients++;
 690
 691             if (trayclient->win != event->window)
 692                 continue;
 693
 694             xcb_rectangle_t rect;
 695             rect.x = output->rect.w - (clients * (font.height + 2));
 696             rect.y = 2;
 697             rect.width = font.height;
 698             rect.height = font.height;
 699
 700             DLOG("This is a tray window. x = %d\n", rect.x);
 701             fake_configure_notify(xcb_connection, rect, event->window, 0);
 702             return;
 703         }
 704     }
 705
 706     DLOG("WARNING: Could not find corresponding tray window.\n");
 707 }
 708
 709 /*
 710  * This function is called immediately before the main loop locks. We flush xcb
 711  * then (and only then)
 712  *
 713  */
 714 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 715     xcb_flush(xcb_connection);
 716 }
 717
 718 /*
 719  * This function is called immediately after the main loop locks, so when one
 720  * of the watchers registered an event.
 721  * We check whether an X-Event arrived and handle it.
 722  *
 723  */
 724 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 725     xcb_generic_event_t *event;
 726
 727     if (xcb_connection_has_error(xcb_connection)) {
 728         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
 729         exit(1);
 730     }
 731
 732     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
 733         switch (event->response_type & ~0x80) {
 734             case XCB_EXPOSE:
 735                 /* Expose-events happen, when the window needs to be redrawn */
 736                 redraw_bars();
 737                 break;
 738             case XCB_BUTTON_PRESS:
 739                 /* Button-press-events are mouse-buttons clicked on one of our bars */
 740                 handle_button((xcb_button_press_event_t*) event);
 741                 break;
 742             case XCB_CLIENT_MESSAGE:
 743                 /* Client messages are used for client-to-client communication, for
 744                  * example system tray widgets talk to us directly via client messages. */
 745                 handle_client_message((xcb_client_message_event_t*) event);
 746                 break;
 747             case XCB_UNMAP_NOTIFY:
 748             case XCB_DESTROY_NOTIFY:
 749                 /* UnmapNotifies are received when a tray window unmaps itself */
 750                 handle_unmap_notify((xcb_unmap_notify_event_t*) event);
 751                 break;
 752             case XCB_PROPERTY_NOTIFY:
 753                 /* PropertyNotify */
 754                 handle_property_notify((xcb_property_notify_event_t*) event);
 755                 break;
 756             case XCB_CONFIGURE_REQUEST:
 757                 /* ConfigureRequest, sent by a tray child */
 758                 handle_configure_request((xcb_configure_request_event_t*) event);
 759                 break;
 760         }
 761         free(event);
 762     }
 763 }
 764
 765 /*
 766  * Dummy Callback. We only need this, so that the Prepare- and Check-Watchers
 767  * are triggered
 768  *
 769  */
 770 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 771 }
 772
 773 /*
 774  * We need to bind to the modifier per XKB. Sadly, XCB does not implement this
 775  *
 776  */
 777 void xkb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 778     XkbEvent ev;
 779     int modstate = 0;
 780
 781     DLOG("Got XKB-Event!\n");
 782
 783     while (XPending(xkb_dpy)) {
 784         XNextEvent(xkb_dpy, (XEvent*)&ev);
 785
 786         if (ev.type != xkb_event_base) {
 787             ELOG("No Xkb-Event!\n");
 788             continue;
 789         }
 790
 791         if (ev.any.xkb_type != XkbStateNotify) {
 792             ELOG("No State Notify!\n");
 793             continue;
 794         }
 795
 796         unsigned int mods = ev.state.mods;
 797         modstate = mods & config.modifier;
 798     }
 799
 800 #define DLOGMOD(modmask, status, barfunc) \
 801     do { \
 802         switch (modmask) { \
 803             case ShiftMask: \
 804                 DLOG("ShiftMask got " #status "!\n"); \
 805                 break; \
 806             case ControlMask: \
 807                 DLOG("ControlMask got " #status "!\n"); \
 808                 break; \
 809             case Mod1Mask: \
 810                 DLOG("Mod1Mask got " #status "!\n"); \
 811                 break; \
 812             case Mod2Mask: \
 813                 DLOG("Mod2Mask got " #status "!\n"); \
 814                 break; \
 815             case Mod3Mask: \
 816                 DLOG("Mod3Mask got " #status "!\n"); \
 817                 break; \
 818             case Mod4Mask: \
 819                 DLOG("Mod4Mask got " #status "!\n"); \
 820                 break; \
 821             case Mod5Mask: \
 822                 DLOG("Mod5Mask got " #status "!\n"); \
 823                 break; \
 824         } \
 825         barfunc(); \
 826     } while (0)
 827
 828     if (modstate != mod_pressed) {
 829         if (modstate == 0) {
 830             DLOGMOD(config.modifier, released, hide_bars);
 831         } else {
 832             DLOGMOD(config.modifier, pressed, unhide_bars);
 833         }
 834         mod_pressed = modstate;
 835     }
 836
 837 #undef DLOGMOD
 838 }
 839
 840 /*
 841  * Early initialization of the connection to X11: Everything which does not
 842  * depend on 'config'.
 843  *
 844  */
 845 char *init_xcb_early() {
 846     /* FIXME: xcb_connect leaks Memory */
 847     xcb_connection = xcb_connect(NULL, &screen);
 848     if (xcb_connection_has_error(xcb_connection)) {
 849         ELOG("Cannot open display\n");
 850         exit(EXIT_FAILURE);
 851     }
 852     conn = xcb_connection;
 853     DLOG("Connected to xcb\n");
 854
 855     /* We have to request the atoms we need */
 856     #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
 857     #include "xcb_atoms.def"
 858
 859     root_screen = xcb_aux_get_screen(xcb_connection, screen);
 860     xcb_root = root_screen->root;
 861
 862     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
 863      * this way, we can choose to crop it */
 864     uint32_t mask = XCB_GC_FOREGROUND;
 865     uint32_t vals[] = { colors.bar_bg, colors.bar_bg };
 866
 867     statusline_clear = xcb_generate_id(xcb_connection);
 868     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 869                                                                statusline_clear,
 870                                                                xcb_root,
 871                                                                mask,
 872                                                                vals);
 873
 874     statusline_ctx = xcb_generate_id(xcb_connection);
 875     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 876                                                             statusline_ctx,
 877                                                             xcb_root,
 878                                                             0,
 879                                                             NULL);
 880
 881     statusline_pm = xcb_generate_id(xcb_connection);
 882     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
 883                                                                root_screen->root_depth,
 884                                                                statusline_pm,
 885                                                                xcb_root,
 886                                                                root_screen->width_in_pixels,
 887                                                                root_screen->height_in_pixels);
 888
 889
 890     /* The various Watchers to communicate with xcb */
 891     xcb_io = smalloc(sizeof(ev_io));
 892     xcb_prep = smalloc(sizeof(ev_prepare));
 893     xcb_chk = smalloc(sizeof(ev_check));
 894
 895     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
 896     ev_prepare_init(xcb_prep, &xcb_prep_cb);
 897     ev_check_init(xcb_chk, &xcb_chk_cb);
 898
 899     ev_io_start(main_loop, xcb_io);
 900     ev_prepare_start(main_loop, xcb_prep);
 901     ev_check_start(main_loop, xcb_chk);
 902
 903     /* Now we get the atoms and save them in a nice data structure */
 904     get_atoms();
 905
 906     xcb_get_property_cookie_t path_cookie;
 907     path_cookie = xcb_get_property_unchecked(xcb_connection,
 908                                    0,
 909                                    xcb_root,
 910                                    atoms[I3_SOCKET_PATH],
 911                                    XCB_GET_PROPERTY_TYPE_ANY,
 912                                    0, PATH_MAX);
 913
 914     /* We check, if i3 set its socket-path */
 915     xcb_get_property_reply_t *path_reply = xcb_get_property_reply(xcb_connection,
 916                                                                   path_cookie,
 917                                                                   NULL);
 918     char *path = NULL;
 919     if (path_reply) {
 920         int len = xcb_get_property_value_length(path_reply);
 921         if (len != 0) {
 922             path = strndup(xcb_get_property_value(path_reply), len);
 923         }
 924     }
 925
 926
 927     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
 928         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
 929         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
 930         exit(EXIT_FAILURE);
 931     }
 932
 933     return path;
 934 }
 935
 936 /*
 937  * Initialization which depends on 'config' being usable. Called after the
 938  * configuration has arrived.
 939  *
 940  */
 941 void init_xcb_late(char *fontname) {
 942     if (fontname == NULL)
 943         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
 944
 945     /* Load the font */
 946     font = load_font(fontname, true);
 947     set_font(&font);
 948     DLOG("Calculated Font-height: %d\n", font.height);
 949
 950     xcb_flush(xcb_connection);
 951
 952     /* To grab modifiers without blocking other applications from receiving key-events
 953      * involving that modifier, we sadly have to use xkb which is not yet fully supported
 954      * in xcb */
 955     if (config.hide_on_modifier) {
 956         int xkb_major, xkb_minor, xkb_errbase, xkb_err;
 957         xkb_major = XkbMajorVersion;
 958         xkb_minor = XkbMinorVersion;
 959
 960         xkb_dpy = XkbOpenDisplay(NULL,
 961                                  &xkb_event_base,
 962                                  &xkb_errbase,
 963                                  &xkb_major,
 964                                  &xkb_minor,
 965                                  &xkb_err);
 966
 967         if (xkb_dpy == NULL) {
 968             ELOG("No XKB!\n");
 969             exit(EXIT_FAILURE);
 970         }
 971
 972         if (fcntl(ConnectionNumber(xkb_dpy), F_SETFD, FD_CLOEXEC) == -1) {
 973             ELOG("Could not set FD_CLOEXEC on xkbdpy: %s\n", strerror(errno));
 974             exit(EXIT_FAILURE);
 975         }
 976
 977         int i1;
 978         if (!XkbQueryExtension(xkb_dpy, &i1, &xkb_event_base, &xkb_errbase, &xkb_major, &xkb_minor)) {
 979             ELOG("XKB not supported by X-server!\n");
 980             exit(EXIT_FAILURE);
 981         }
 982
 983         if (!XkbSelectEvents(xkb_dpy, XkbUseCoreKbd, XkbStateNotifyMask, XkbStateNotifyMask)) {
 984             ELOG("Could not grab Key!\n");
 985             exit(EXIT_FAILURE);
 986         }
 987
 988         xkb_io = smalloc(sizeof(ev_io));
 989         ev_io_init(xkb_io, &xkb_io_cb, ConnectionNumber(xkb_dpy), EV_READ);
 990         ev_io_start(main_loop, xkb_io);
 991         XFlush(xkb_dpy);
 992     }
 993 }
 994
 995 /*
 996  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
 997  * for the X11 display we are running on, then acquiring the selection for this
 998  * atom. Afterwards, tray clients will send ClientMessages to our window.
 999  *
1000  */
1001 void init_tray(void) {
1002     DLOG("Initializing system tray functionality\n");
1003     /* request the tray manager atom for the X11 display we are running on */
1004     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
1005     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
1006     xcb_intern_atom_cookie_t tray_cookie;
1007     xcb_intern_atom_reply_t *tray_reply;
1008     tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
1009
1010     /* tray support: we need a window to own the selection */
1011     xcb_window_t selwin = xcb_generate_id(xcb_connection);
1012     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
1013     uint32_t selval[] = { 1 };
1014     xcb_create_window(xcb_connection,
1015                       root_screen->root_depth,
1016                       selwin,
1017                       xcb_root,
1018                       -1, -1,
1019                       1, 1,
1020                       1,
1021                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
1022                       root_screen->root_visual,
1023                       selmask,
1024                       selval);
1025
1026     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
1027     /* set the atoms */
1028     xcb_change_property(xcb_connection,
1029                         XCB_PROP_MODE_REPLACE,
1030                         selwin,
1031                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1032                         XCB_ATOM_CARDINAL,
1033                         32,
1034                         1,
1035                         &orientation);
1036
1037     if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1038         ELOG("Could not get atom %s\n", atomname);
1039         exit(EXIT_FAILURE);
1040     }
1041
1042     xcb_set_selection_owner(xcb_connection,
1043                             selwin,
1044                             tray_reply->atom,
1045                             XCB_CURRENT_TIME);
1046
1047     /* Verify that we have the selection */
1048     xcb_get_selection_owner_cookie_t selcookie;
1049     xcb_get_selection_owner_reply_t *selreply;
1050
1051     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1052     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1053         ELOG("Could not get selection owner for %s\n", atomname);
1054         exit(EXIT_FAILURE);
1055     }
1056
1057     if (selreply->owner != selwin) {
1058         ELOG("Could not set the %s selection. " \
1059              "Maybe another tray is already running?\n", atomname);
1060         /* NOTE that this error is not fatal. We just can’t provide tray
1061          * functionality */
1062         free(selreply);
1063         return;
1064     }
1065
1066     /* Inform clients waiting for a new _NET_SYSTEM_TRAY that we are here */
1067     void *event = scalloc(32);
1068     xcb_client_message_event_t *ev = event;
1069     ev->response_type = XCB_CLIENT_MESSAGE;
1070     ev->window = xcb_root;
1071     ev->type = atoms[MANAGER];
1072     ev->format = 32;
1073     ev->data.data32[0] = XCB_CURRENT_TIME;
1074     ev->data.data32[1] = tray_reply->atom;
1075     ev->data.data32[2] = selwin;
1076     xcb_send_event(xcb_connection,
1077                    0,
1078                    xcb_root,
1079                    0xFFFFFF,
1080                    (char*)ev);
1081     free(event);
1082     free(tray_reply);
1083 }
1084
1085 /*
1086  * Cleanup the xcb-stuff.
1087  * Called once, before the program terminates.
1088  *
1089  */
1090 void clean_xcb(void) {
1091     i3_output *o_walk;
1092     free_workspaces();
1093     SLIST_FOREACH(o_walk, outputs, slist) {
1094         destroy_window(o_walk);
1095         FREE(o_walk->trayclients);
1096         FREE(o_walk->workspaces);
1097         FREE(o_walk->name);
1098     }
1099     FREE_SLIST(outputs, i3_output);
1100     FREE(outputs);
1101
1102     xcb_flush(xcb_connection);
1103     xcb_disconnect(xcb_connection);
1104
1105     ev_check_stop(main_loop, xcb_chk);
1106     ev_prepare_stop(main_loop, xcb_prep);
1107     ev_io_stop(main_loop, xcb_io);
1108
1109     FREE(xcb_chk);
1110     FREE(xcb_prep);
1111     FREE(xcb_io);
1112 }
1113
1114 /*
1115  * Get the earlier requested atoms and save them in the prepared data structure
1116  *
1117  */
1118 void get_atoms(void) {
1119     xcb_intern_atom_reply_t *reply;
1120     #define ATOM_DO(name) reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1121         if (reply == NULL) { \
1122             ELOG("Could not get atom %s\n", #name); \
1123             exit(EXIT_FAILURE); \
1124         } \
1125         atoms[name] = reply->atom; \
1126         free(reply);
1127
1128     #include "xcb_atoms.def"
1129     DLOG("Got Atoms\n");
1130 }
1131
1132 /*
1133  * Reparents all tray clients of the specified output to the root window. This
1134  * is either used when shutting down, when an output appears (xrandr --output
1135  * VGA1 --off) or when the primary output changes.
1136  *
1137  * Applications using the tray will start the protocol from the beginning again
1138  * afterwards.
1139  *
1140  */
1141 void kick_tray_clients(i3_output *output) {
1142     trayclient *trayclient;
1143     while (!TAILQ_EMPTY(output->trayclients)) {
1144         trayclient = TAILQ_FIRST(output->trayclients);
1145         /* Unmap, then reparent (to root) the tray client windows */
1146         xcb_unmap_window(xcb_connection, trayclient->win);
1147         xcb_reparent_window(xcb_connection,
1148                             trayclient->win,
1149                             xcb_root,
1150                             0,
1151                             0);
1152
1153         /* We remove the trayclient right here. We might receive an UnmapNotify
1154          * event afterwards, but better safe than sorry. */
1155         TAILQ_REMOVE(output->trayclients, trayclient, tailq);
1156     }
1157 }
1158
1159 /*
1160  * Destroy the bar of the specified output
1161  *
1162  */
1163 void destroy_window(i3_output *output) {
1164     if (output == NULL) {
1165         return;
1166     }
1167     if (output->bar == XCB_NONE) {
1168         return;
1169     }
1170
1171     kick_tray_clients(output);
1172     xcb_destroy_window(xcb_connection, output->bar);
1173     output->bar = XCB_NONE;
1174 }
1175
1176 /*
1177  * Reallocate the statusline-buffer
1178  *
1179  */
1180 void realloc_sl_buffer(void) {
1181     DLOG("Re-allocating statusline-buffer, statusline_width = %d, root_screen->width_in_pixels = %d\n",
1182          statusline_width, root_screen->width_in_pixels);
1183     xcb_free_pixmap(xcb_connection, statusline_pm);
1184     statusline_pm = xcb_generate_id(xcb_connection);
1185     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1186                                                                root_screen->root_depth,
1187                                                                statusline_pm,
1188                                                                xcb_root,
1189                                                                MAX(root_screen->width_in_pixels, statusline_width),
1190                                                                root_screen->height_in_pixels);
1191
1192     uint32_t mask = XCB_GC_FOREGROUND;
1193     uint32_t vals[2] = { colors.bar_bg, colors.bar_bg };
1194     xcb_free_gc(xcb_connection, statusline_clear);
1195     statusline_clear = xcb_generate_id(xcb_connection);
1196     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1197                                                                statusline_clear,
1198                                                                xcb_root,
1199                                                                mask,
1200                                                                vals);
1201
1202     mask |= XCB_GC_BACKGROUND;
1203     vals[0] = colors.bar_fg;
1204     statusline_ctx = xcb_generate_id(xcb_connection);
1205     xcb_free_gc(xcb_connection, statusline_ctx);
1206     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1207                                                             statusline_ctx,
1208                                                             xcb_root,
1209                                                             mask,
1210                                                             vals);
1211
1212     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
1213         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
1214         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
1215         exit(EXIT_FAILURE);
1216     }
1217
1218 }
1219
1220 /*
1221  * Reconfigure all bars and create new bars for recently activated outputs
1222  *
1223  */
1224 void reconfig_windows(void) {
1225     uint32_t mask;
1226     uint32_t values[5];
1227     static bool tray_configured = false;
1228
1229     i3_output *walk;
1230     SLIST_FOREACH(walk, outputs, slist) {
1231         if (!walk->active) {
1232             /* If an output is not active, we destroy its bar */
1233             /* FIXME: Maybe we rather want to unmap? */
1234             DLOG("Destroying window for output %s\n", walk->name);
1235             destroy_window(walk);
1236             continue;
1237         }
1238         if (walk->bar == XCB_NONE) {
1239             DLOG("Creating Window for output %s\n", walk->name);
1240
1241             walk->bar = xcb_generate_id(xcb_connection);
1242             walk->buffer = xcb_generate_id(xcb_connection);
1243             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1244             /* Black background */
1245             values[0] = colors.bar_bg;
1246             /* If hide_on_modifier is set, i3 is not supposed to manage our bar-windows */
1247             values[1] = config.hide_on_modifier;
1248             /* We enable the following EventMask fields:
1249              * EXPOSURE, to get expose events (we have to re-draw then)
1250              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1251              *                        child windows use ConfigureWindow
1252              * BUTTON_PRESS, to handle clicks on the workspace buttons
1253              * */
1254             values[2] = XCB_EVENT_MASK_EXPOSURE |
1255                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
1256             if (!config.disable_ws) {
1257                 values[2] |= XCB_EVENT_MASK_BUTTON_PRESS;
1258             }
1259             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1260                                                                      root_screen->root_depth,
1261                                                                      walk->bar,
1262                                                                      xcb_root,
1263                                                                      walk->rect.x, walk->rect.y + walk->rect.h - font.height - 6,
1264                                                                      walk->rect.w, font.height + 6,
1265                                                                      1,
1266                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1267                                                                      root_screen->root_visual,
1268                                                                      mask,
1269                                                                      values);
1270
1271             /* The double-buffer we use to render stuff off-screen */
1272             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1273                                                                     root_screen->root_depth,
1274                                                                     walk->buffer,
1275                                                                     walk->bar,
1276                                                                     walk->rect.w,
1277                                                                     walk->rect.h);
1278
1279             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1280             xcb_void_cookie_t class_cookie;
1281             class_cookie = xcb_change_property(xcb_connection,
1282                                                XCB_PROP_MODE_REPLACE,
1283                                                walk->bar,
1284                                                XCB_ATOM_WM_CLASS,
1285                                                XCB_ATOM_STRING,
1286                                                8,
1287                                                (strlen("i3bar") + 1) * 2,
1288                                                "i3bar\0i3bar\0");
1289
1290             char *name;
1291             if (asprintf(&name, "i3bar for output %s", walk->name) == -1)
1292                 err(EXIT_FAILURE, "asprintf()");
1293             xcb_void_cookie_t name_cookie;
1294             name_cookie = xcb_change_property(xcb_connection,
1295                                               XCB_PROP_MODE_REPLACE,
1296                                               walk->bar,
1297                                               XCB_ATOM_WM_NAME,
1298                                               XCB_ATOM_STRING,
1299                                               8,
1300                                               strlen(name),
1301                                               name);
1302             free(name);
1303
1304             /* We want dock-windows (for now). When override_redirect is set, i3 is ignoring
1305              * this one */
1306             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1307                                                                 XCB_PROP_MODE_REPLACE,
1308                                                                 walk->bar,
1309                                                                 atoms[_NET_WM_WINDOW_TYPE],
1310                                                                 XCB_ATOM_ATOM,
1311                                                                 32,
1312                                                                 1,
1313                                                                 (unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1314
1315             /* We need to tell i3, where to reserve space for i3bar */
1316             /* left, right, top, bottom, left_start_y, left_end_y,
1317              * right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x,
1318              * bottom_end_x */
1319             /* A local struct to save the strut_partial property */
1320             struct {
1321                 uint32_t left;
1322                 uint32_t right;
1323                 uint32_t top;
1324                 uint32_t bottom;
1325                 uint32_t left_start_y;
1326                 uint32_t left_end_y;
1327                 uint32_t right_start_y;
1328                 uint32_t right_end_y;
1329                 uint32_t top_start_x;
1330                 uint32_t top_end_x;
1331                 uint32_t bottom_start_x;
1332                 uint32_t bottom_end_x;
1333             } __attribute__((__packed__)) strut_partial = {0,};
1334             switch (config.position) {
1335                 case POS_NONE:
1336                     break;
1337                 case POS_TOP:
1338                     strut_partial.top = font.height + 6;
1339                     strut_partial.top_start_x = walk->rect.x;
1340                     strut_partial.top_end_x = walk->rect.x + walk->rect.w;
1341                     break;
1342                 case POS_BOT:
1343                     strut_partial.bottom = font.height + 6;
1344                     strut_partial.bottom_start_x = walk->rect.x;
1345                     strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
1346                     break;
1347             }
1348             xcb_void_cookie_t strut_cookie = xcb_change_property(xcb_connection,
1349                                                                  XCB_PROP_MODE_REPLACE,
1350                                                                  walk->bar,
1351                                                                  atoms[_NET_WM_STRUT_PARTIAL],
1352                                                                  XCB_ATOM_CARDINAL,
1353                                                                  32,
1354                                                                  12,
1355                                                                  &strut_partial);
1356
1357             /* We also want a graphics-context for the bars (it defines the properties
1358              * with which we draw to them) */
1359             walk->bargc = xcb_generate_id(xcb_connection);
1360             xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
1361                                                                 walk->bargc,
1362                                                                 walk->bar,
1363                                                                 0,
1364                                                                 NULL);
1365
1366             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1367             xcb_void_cookie_t map_cookie;
1368             if (!config.hide_on_modifier) {
1369                 map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1370             }
1371
1372             if (xcb_request_failed(win_cookie,   "Could not create window") ||
1373                 xcb_request_failed(pm_cookie,    "Could not create pixmap") ||
1374                 xcb_request_failed(dock_cookie,  "Could not set dock mode") ||
1375                 xcb_request_failed(class_cookie, "Could not set WM_CLASS")  ||
1376                 xcb_request_failed(name_cookie,  "Could not set WM_NAME")   ||
1377                 xcb_request_failed(strut_cookie, "Could not set strut")     ||
1378                 xcb_request_failed(gc_cookie,    "Could not create graphical context") ||
1379                 (!config.hide_on_modifier && xcb_request_failed(map_cookie, "Could not map window"))) {
1380                 exit(EXIT_FAILURE);
1381             }
1382
1383             if (!tray_configured &&
1384                 (!config.tray_output ||
1385                  strcasecmp("none", config.tray_output) != 0)) {
1386                 init_tray();
1387                 tray_configured = true;
1388             }
1389         } else {
1390             /* We already have a bar, so we just reconfigure it */
1391             mask = XCB_CONFIG_WINDOW_X |
1392                    XCB_CONFIG_WINDOW_Y |
1393                    XCB_CONFIG_WINDOW_WIDTH |
1394                    XCB_CONFIG_WINDOW_HEIGHT |
1395                    XCB_CONFIG_WINDOW_STACK_MODE;
1396             values[0] = walk->rect.x;
1397             values[1] = walk->rect.y + walk->rect.h - font.height - 6;
1398             values[2] = walk->rect.w;
1399             values[3] = font.height + 6;
1400             values[4] = XCB_STACK_MODE_ABOVE;
1401
1402             DLOG("Destroying buffer for output %s", walk->name);
1403             xcb_free_pixmap(xcb_connection, walk->buffer);
1404
1405             DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1406             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1407                                                                         walk->bar,
1408                                                                         mask,
1409                                                                         values);
1410
1411             DLOG("Recreating buffer for output %s", walk->name);
1412             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1413                                                                     root_screen->root_depth,
1414                                                                     walk->buffer,
1415                                                                     walk->bar,
1416                                                                     walk->rect.w,
1417                                                                     walk->rect.h);
1418
1419             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window")) {
1420                 exit(EXIT_FAILURE);
1421             }
1422             if (xcb_request_failed(pm_cookie,  "Could not create pixmap")) {
1423                 exit(EXIT_FAILURE);
1424             }
1425         }
1426     }
1427 }
1428
1429 /*
1430  * Render the bars, with buttons and statusline
1431  *
1432  */
1433 void draw_bars(bool unhide) {
1434     DLOG("Drawing Bars...\n");
1435     int i = 0;
1436
1437     refresh_statusline();
1438
1439     static char *last_urgent_ws = NULL;
1440     bool walks_away = true;
1441
1442     i3_output *outputs_walk;
1443     SLIST_FOREACH(outputs_walk, outputs, slist) {
1444         if (!outputs_walk->active) {
1445             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1446             continue;
1447         }
1448         if (outputs_walk->bar == XCB_NONE) {
1449             /* Oh shit, an active output without an own bar. Create it now! */
1450             reconfig_windows();
1451         }
1452         /* First things first: clear the backbuffer */
1453         uint32_t color = colors.bar_bg;
1454         xcb_change_gc(xcb_connection,
1455                       outputs_walk->bargc,
1456                       XCB_GC_FOREGROUND,
1457                       &color);
1458         xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font.height + 6 };
1459         xcb_poly_fill_rectangle(xcb_connection,
1460                                 outputs_walk->buffer,
1461                                 outputs_walk->bargc,
1462                                 1,
1463                                 &rect);
1464
1465         if (!TAILQ_EMPTY(&statusline_head)) {
1466             DLOG("Printing statusline!\n");
1467
1468             /* Luckily we already prepared a seperate pixmap containing the rendered
1469              * statusline, we just have to copy the relevant parts to the relevant
1470              * position */
1471             trayclient *trayclient;
1472             int traypx = 0;
1473             TAILQ_FOREACH(trayclient, outputs_walk->trayclients, tailq) {
1474                 if (!trayclient->mapped)
1475                     continue;
1476                 /* We assume the tray icons are quadratic (we use the font
1477                  * *height* as *width* of the icons) because we configured them
1478                  * like this. */
1479                 traypx += font.height + 2;
1480             }
1481             /* Add 2px of padding if there are any tray icons */
1482             if (traypx > 0)
1483                 traypx += 2;
1484             xcb_copy_area(xcb_connection,
1485                           statusline_pm,
1486                           outputs_walk->buffer,
1487                           outputs_walk->bargc,
1488                           MAX(0, (int16_t)(statusline_width - outputs_walk->rect.w + 4)), 0,
1489                           MAX(0, (int16_t)(outputs_walk->rect.w - statusline_width - traypx - 4)), 3,
1490                           MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font.height);
1491         }
1492
1493         if (config.disable_ws) {
1494             continue;
1495         }
1496
1497         i3_ws *ws_walk;
1498
1499         TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1500             DLOG("Drawing Button for WS %s at x = %d, len = %d\n", i3string_as_utf8(ws_walk->name), i, ws_walk->name_width);
1501             uint32_t fg_color = colors.inactive_ws_fg;
1502             uint32_t bg_color = colors.inactive_ws_bg;
1503             uint32_t border_color = colors.inactive_ws_border;
1504             if (ws_walk->visible) {
1505                 if (!ws_walk->focused) {
1506                     fg_color = colors.active_ws_fg;
1507                     bg_color = colors.active_ws_bg;
1508                     border_color = colors.active_ws_border;
1509                 } else {
1510                     fg_color = colors.focus_ws_fg;
1511                     bg_color = colors.focus_ws_bg;
1512                     border_color = colors.focus_ws_border;
1513                     if (last_urgent_ws && strcmp(i3string_as_utf8(ws_walk->name), last_urgent_ws) == 0)
1514                         walks_away = false;
1515                 }
1516             }
1517             if (ws_walk->urgent) {
1518                 DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
1519                 fg_color = colors.urgent_ws_fg;
1520                 bg_color = colors.urgent_ws_bg;
1521                 border_color = colors.urgent_ws_border;
1522                 unhide = true;
1523                 if (!ws_walk->focused) {
1524                     FREE(last_urgent_ws);
1525                     last_urgent_ws = sstrdup(i3string_as_utf8(ws_walk->name));
1526                 }
1527             }
1528             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1529             uint32_t vals_border[] = { border_color, border_color };
1530             xcb_change_gc(xcb_connection,
1531                           outputs_walk->bargc,
1532                           mask,
1533                           vals_border);
1534             xcb_rectangle_t rect_border = { i, 0, ws_walk->name_width + 10, font.height + 4 };
1535             xcb_poly_fill_rectangle(xcb_connection,
1536                                     outputs_walk->buffer,
1537                                     outputs_walk->bargc,
1538                                     1,
1539                                     &rect_border);
1540             uint32_t vals[] = { bg_color, bg_color };
1541             xcb_change_gc(xcb_connection,
1542                           outputs_walk->bargc,
1543                           mask,
1544                           vals);
1545             xcb_rectangle_t rect = { i + 1, 1, ws_walk->name_width + 8, font.height + 2 };
1546             xcb_poly_fill_rectangle(xcb_connection,
1547                                     outputs_walk->buffer,
1548                                     outputs_walk->bargc,
1549                                     1,
1550                                     &rect);
1551             set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1552             draw_text(ws_walk->name, outputs_walk->buffer, outputs_walk->bargc, i + 5, 2, ws_walk->name_width);
1553             i += 10 + ws_walk->name_width + 1;
1554
1555         }
1556
1557         if (binding.name) {
1558
1559             uint32_t fg_color = colors.urgent_ws_fg;
1560             uint32_t bg_color = colors.urgent_ws_bg;
1561             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1562
1563             uint32_t vals_border[] = { colors.urgent_ws_border, colors.urgent_ws_border };
1564             xcb_change_gc(xcb_connection,
1565                           outputs_walk->bargc,
1566                           mask,
1567                           vals_border);
1568             xcb_rectangle_t rect_border = { i, 0, binding.width + 10, font.height + 4 };
1569             xcb_poly_fill_rectangle(xcb_connection,
1570                                     outputs_walk->buffer,
1571                                     outputs_walk->bargc,
1572                                     1,
1573                                     &rect_border);
1574
1575             uint32_t vals[] = { bg_color, bg_color };
1576             xcb_change_gc(xcb_connection,
1577                           outputs_walk->bargc,
1578                           mask,
1579                           vals);
1580             xcb_rectangle_t rect = { i + 1, 1, binding.width + 8, font.height + 2 };
1581             xcb_poly_fill_rectangle(xcb_connection,
1582                                     outputs_walk->buffer,
1583                                     outputs_walk->bargc,
1584                                     1,
1585                                     &rect);
1586
1587             set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1588             draw_text(binding.name, outputs_walk->buffer, outputs_walk->bargc, i + 5, 2, binding.width);
1589         }
1590
1591         i = 0;
1592     }
1593
1594     if (!mod_pressed) {
1595         if (unhide) {
1596             /* The urgent-hint should get noticed, so we unhide the bars shortly */
1597             unhide_bars();
1598         } else if (walks_away) {
1599             FREE(last_urgent_ws);
1600             hide_bars();
1601         }
1602     }
1603
1604     redraw_bars();
1605 }
1606
1607 /*
1608  * Redraw the bars, i.e. simply copy the buffer to the barwindow
1609  *
1610  */
1611 void redraw_bars(void) {
1612     i3_output *outputs_walk;
1613     SLIST_FOREACH(outputs_walk, outputs, slist) {
1614         if (!outputs_walk->active) {
1615             continue;
1616         }
1617         xcb_copy_area(xcb_connection,
1618                       outputs_walk->buffer,
1619                       outputs_walk->bar,
1620                       outputs_walk->bargc,
1621                       0, 0,
1622                       0, 0,
1623                       outputs_walk->rect.w,
1624                       outputs_walk->rect.h);
1625         xcb_flush(xcb_connection);
1626     }
1627 }
1628
1629 /*
1630  * Set the current binding mode
1631  *
1632  */
1633 void set_current_mode(struct mode *current) {
1634     I3STRING_FREE(binding.name);
1635     binding = *current;
1636     return;
1637 }