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_aux.h>
  13
  14 #ifdef XCB_COMPAT
  15 #include "xcb_compat.h"
  16 #endif
  17
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <unistd.h>
  21 #include <fcntl.h>
  22 #include <string.h>
  23 #include <i3/ipc.h>
  24 #include <ev.h>
  25 #include <errno.h>
  26 #include <limits.h>
  27 #include <err.h>
  28
  29 #include <X11/Xlib.h>
  30 #include <X11/XKBlib.h>
  31 #include <X11/extensions/XKB.h>
  32
  33 #include "common.h"
  34 #include "libi3.h"
  35
  36 /* We save the Atoms in an easy to access array, indexed by an enum */
  37 enum {
  38     #define ATOM_DO(name) name,
  39     #include "xcb_atoms.def"
  40     NUM_ATOMS
  41 };
  42
  43 xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
  44 xcb_atom_t               atoms[NUM_ATOMS];
  45
  46 /* Variables, that are the same for all functions at all times */
  47 xcb_connection_t *xcb_connection;
  48 int              screen;
  49 xcb_screen_t     *root_screen;
  50 xcb_window_t     xcb_root;
  51
  52 /* selection window for tray support */
  53 static xcb_window_t selwin = XCB_NONE;
  54 static xcb_intern_atom_reply_t *tray_reply = NULL;
  55
  56 /* This is needed for integration with libi3 */
  57 xcb_connection_t *conn;
  58
  59 /* The font we'll use */
  60 static i3Font font;
  61
  62 /* These are only relevant for XKB, which we only need for grabbing modifiers */
  63 Display          *xkb_dpy;
  64 int              xkb_event_base;
  65 int              mod_pressed = 0;
  66
  67 /* Because the statusline is the same on all outputs, we have
  68  * global buffer to render it on */
  69 xcb_gcontext_t   statusline_ctx;
  70 xcb_gcontext_t   statusline_clear;
  71 xcb_pixmap_t     statusline_pm;
  72 uint32_t         statusline_width;
  73
  74 /* Event-Watchers, to interact with the user */
  75 ev_prepare *xcb_prep;
  76 ev_check   *xcb_chk;
  77 ev_io      *xcb_io;
  78 ev_io      *xkb_io;
  79
  80 /* The name of current binding mode */
  81 static mode binding;
  82
  83 /* The parsed colors */
  84 struct xcb_colors_t {
  85     uint32_t bar_fg;
  86     uint32_t bar_bg;
  87     uint32_t sep_fg;
  88     uint32_t active_ws_fg;
  89     uint32_t active_ws_bg;
  90     uint32_t active_ws_border;
  91     uint32_t inactive_ws_fg;
  92     uint32_t inactive_ws_bg;
  93     uint32_t inactive_ws_border;
  94     uint32_t urgent_ws_bg;
  95     uint32_t urgent_ws_fg;
  96     uint32_t urgent_ws_border;
  97     uint32_t focus_ws_bg;
  98     uint32_t focus_ws_fg;
  99     uint32_t focus_ws_border;
 100 };
 101 struct xcb_colors_t colors;
 102
 103 /* We define xcb_request_failed as a macro to include the relevant line-number */
 104 #define xcb_request_failed(cookie, err_msg) _xcb_request_failed(cookie, err_msg, __LINE__)
 105 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
 106     xcb_generic_error_t *err;
 107     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
 108         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
 109         return err->error_code;
 110     }
 111     return 0;
 112 }
 113
 114 /*
 115  * Redraws the statusline to the buffer
 116  *
 117  */
 118 void refresh_statusline(void) {
 119     struct status_block *block;
 120
 121     uint32_t old_statusline_width = statusline_width;
 122     statusline_width = 0;
 123
 124     /* Predict the text width of all blocks (in pixels). */
 125     TAILQ_FOREACH(block, &statusline_head, blocks) {
 126         if (i3string_get_num_bytes(block->full_text) == 0)
 127             continue;
 128
 129         block->width = predict_text_width(block->full_text);
 130
 131         /* Compute offset and append for text aligment in min_width. */
 132         if (block->min_width <= block->width) {
 133             block->x_offset = 0;
 134             block->x_append = 0;
 135         } else {
 136             uint32_t padding_width = block->min_width - block->width;
 137             switch (block->align) {
 138                 case ALIGN_LEFT:
 139                     block->x_append = padding_width;
 140                     break;
 141                 case ALIGN_RIGHT:
 142                     block->x_offset = padding_width;
 143                     break;
 144                 case ALIGN_CENTER:
 145                     block->x_offset = padding_width / 2;
 146                     block->x_append = padding_width / 2 + padding_width % 2;
 147                     break;
 148             }
 149         }
 150
 151         /* If this is not the last block, add some pixels for a separator. */
 152         if (TAILQ_NEXT(block, blocks) != NULL)
 153             block->width += block->sep_block_width;
 154
 155         statusline_width += block->width + block->x_offset + block->x_append;
 156     }
 157
 158     /* If the statusline is bigger than our screen we need to make sure that
 159      * the pixmap provides enough space, so re-allocate if the width grew */
 160     if (statusline_width > root_screen->width_in_pixels &&
 161         statusline_width > old_statusline_width)
 162         realloc_sl_buffer();
 163
 164     /* Clear the statusline pixmap. */
 165     xcb_rectangle_t rect = { 0, 0, root_screen->width_in_pixels, font.height };
 166     xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_clear, 1, &rect);
 167
 168     /* Draw the text of each block. */
 169     uint32_t x = 0;
 170     TAILQ_FOREACH(block, &statusline_head, blocks) {
 171         if (i3string_get_num_bytes(block->full_text) == 0)
 172             continue;
 173
 174         uint32_t colorpixel = (block->color ? get_colorpixel(block->color) : colors.bar_fg);
 175         set_font_colors(statusline_ctx, colorpixel, colors.bar_bg);
 176         draw_text(block->full_text, statusline_pm, statusline_ctx, x + block->x_offset, 1, block->width);
 177         x += block->width + block->x_offset + block->x_append;
 178
 179         if (TAILQ_NEXT(block, blocks) != NULL && !block->no_separator && block->sep_block_width > 0) {
 180             /* This is not the last block, draw a separator. */
 181             uint32_t sep_offset = block->sep_block_width/2 + block->sep_block_width % 2;
 182             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
 183             uint32_t values[] = { colors.sep_fg, colors.bar_bg };
 184             xcb_change_gc(xcb_connection, statusline_ctx, mask, values);
 185             xcb_poly_line(xcb_connection, XCB_COORD_MODE_ORIGIN, statusline_pm,
 186                           statusline_ctx, 2,
 187                           (xcb_point_t[]){ { x - sep_offset, 2 },
 188                                            { x - sep_offset, font.height - 2 } });
 189         }
 190     }
 191 }
 192
 193 /*
 194  * Hides all bars (unmaps them)
 195  *
 196  */
 197 void hide_bars(void) {
 198     if (!config.hide_on_modifier) {
 199         return;
 200     }
 201
 202     i3_output *walk;
 203     SLIST_FOREACH(walk, outputs, slist) {
 204         if (!walk->active) {
 205             continue;
 206         }
 207         xcb_unmap_window(xcb_connection, walk->bar);
 208     }
 209     stop_child();
 210 }
 211
 212 /*
 213  * Unhides all bars (maps them)
 214  *
 215  */
 216 void unhide_bars(void) {
 217     if (!config.hide_on_modifier) {
 218         return;
 219     }
 220
 221     i3_output           *walk;
 222     xcb_void_cookie_t   cookie;
 223     uint32_t            mask;
 224     uint32_t            values[5];
 225
 226     cont_child();
 227
 228     SLIST_FOREACH(walk, outputs, slist) {
 229         if (walk->bar == XCB_NONE) {
 230             continue;
 231         }
 232         mask = XCB_CONFIG_WINDOW_X |
 233                XCB_CONFIG_WINDOW_Y |
 234                XCB_CONFIG_WINDOW_WIDTH |
 235                XCB_CONFIG_WINDOW_HEIGHT |
 236                XCB_CONFIG_WINDOW_STACK_MODE;
 237         values[0] = walk->rect.x;
 238         if (config.position == POS_TOP)
 239             values[1] = walk->rect.y;
 240         else values[1] = walk->rect.y + walk->rect.h - font.height - 6;
 241         values[2] = walk->rect.w;
 242         values[3] = font.height + 6;
 243         values[4] = XCB_STACK_MODE_ABOVE;
 244         DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 245         cookie = xcb_configure_window_checked(xcb_connection,
 246                                               walk->bar,
 247                                               mask,
 248                                               values);
 249
 250         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 251             exit(EXIT_FAILURE);
 252         }
 253         xcb_map_window(xcb_connection, walk->bar);
 254     }
 255 }
 256
 257 /*
 258  * Parse the colors into a format that we can use
 259  *
 260  */
 261 void init_colors(const struct xcb_color_strings_t *new_colors) {
 262 #define PARSE_COLOR(name, def) \
 263     do { \
 264         colors.name = get_colorpixel(new_colors->name ? new_colors->name : def); \
 265     } while  (0)
 266     PARSE_COLOR(bar_fg, "#FFFFFF");
 267     PARSE_COLOR(bar_bg, "#000000");
 268     PARSE_COLOR(sep_fg, "#666666");
 269     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 270     PARSE_COLOR(active_ws_bg, "#333333");
 271     PARSE_COLOR(active_ws_border, "#333333");
 272     PARSE_COLOR(inactive_ws_fg, "#888888");
 273     PARSE_COLOR(inactive_ws_bg, "#222222");
 274     PARSE_COLOR(inactive_ws_border, "#333333");
 275     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 276     PARSE_COLOR(urgent_ws_bg, "#900000");
 277     PARSE_COLOR(urgent_ws_border, "#2f343a");
 278     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 279     PARSE_COLOR(focus_ws_bg, "#285577");
 280     PARSE_COLOR(focus_ws_border, "#4c7899");
 281 #undef PARSE_COLOR
 282
 283     init_tray_colors();
 284     xcb_flush(xcb_connection);
 285 }
 286
 287 /*
 288  * Handle a button-press-event (i.e. a mouse click on one of our bars).
 289  * We determine, whether the click occured on a ws-button or if the scroll-
 290  * wheel was used and change the workspace appropriately
 291  *
 292  */
 293 void handle_button(xcb_button_press_event_t *event) {
 294     i3_ws *cur_ws;
 295
 296     /* Determine, which bar was clicked */
 297     i3_output *walk;
 298     xcb_window_t bar = event->event;
 299     SLIST_FOREACH(walk, outputs, slist) {
 300         if (walk->bar == bar) {
 301             break;
 302         }
 303     }
 304
 305     if (walk == NULL) {
 306         DLOG("Unknown Bar klicked!\n");
 307         return;
 308     }
 309
 310     /* TODO: Move this to extern get_ws_for_output() */
 311     TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 312         if (cur_ws->visible) {
 313             break;
 314         }
 315     }
 316
 317     if (cur_ws == NULL) {
 318         DLOG("No Workspace active?\n");
 319         return;
 320     }
 321
 322     int32_t x = event->event_x >= 0 ? event->event_x : 0;
 323
 324     DLOG("Got Button %d\n", event->detail);
 325
 326     switch (event->detail) {
 327         case 1:
 328             /* Left Mousbutton. We determine, which button was clicked
 329              * and set cur_ws accordingly */
 330             TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 331                 DLOG("x = %d\n", x);
 332                 if (x >= 0 && x < cur_ws->name_width + 10) {
 333                     break;
 334                 }
 335                 x -= cur_ws->name_width + 11;
 336             }
 337             if (cur_ws == NULL) {
 338                 return;
 339             }
 340             break;
 341         case 4:
 342             /* Mouse wheel up. We select the previous ws, if any.
 343              * If there is no more workspace, don’t even send the workspace
 344              * command, otherwise (with workspace auto_back_and_forth) we’d end
 345              * up on the wrong workspace. */
 346             if (cur_ws == TAILQ_FIRST(walk->workspaces))
 347                 return;
 348
 349             cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 350             break;
 351         case 5:
 352             /* Mouse wheel down. We select the next ws, if any.
 353              * If there is no more workspace, don’t even send the workspace
 354              * command, otherwise (with workspace auto_back_and_forth) we’d end
 355              * up on the wrong workspace. */
 356             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
 357                 return;
 358
 359             cur_ws = TAILQ_NEXT(cur_ws, tailq);
 360             break;
 361     }
 362
 363     /* To properly handle workspace names with double quotes in them, we need
 364      * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
 365      * first count the number of double quotes, then we allocate a large enough
 366      * buffer, then we copy character by character. */
 367     int num_quotes = 0;
 368     size_t namelen = 0;
 369     const char *utf8_name = i3string_as_utf8(cur_ws->name);
 370     for (const char *walk = utf8_name; *walk != '\0'; walk++) {
 371         if (*walk == '"')
 372             num_quotes++;
 373         /* While we’re looping through the name anyway, we can save one
 374          * strlen(). */
 375         namelen++;
 376     }
 377
 378     const size_t len = namelen + strlen("workspace \"\"") + 1;
 379     char *buffer = scalloc(len+num_quotes);
 380     strncpy(buffer, "workspace \"", strlen("workspace \""));
 381     int inpos, outpos;
 382     for (inpos = 0, outpos = strlen("workspace \"");
 383          inpos < namelen;
 384          inpos++, outpos++) {
 385         if (utf8_name[inpos] == '"') {
 386             buffer[outpos] = '\\';
 387             outpos++;
 388         }
 389         buffer[outpos] = utf8_name[inpos];
 390     }
 391     buffer[outpos] = '"';
 392     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 393     free(buffer);
 394 }
 395
 396 /*
 397  * Configures the x coordinate of all trayclients. To be called after adding a
 398  * new tray client or removing an old one.
 399  *
 400  */
 401 static void configure_trayclients(void) {
 402     trayclient *trayclient;
 403     i3_output *output;
 404     SLIST_FOREACH(output, outputs, slist) {
 405         if (!output->active)
 406             continue;
 407
 408         int clients = 0;
 409         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 410             if (!trayclient->mapped)
 411                 continue;
 412             clients++;
 413
 414             DLOG("Configuring tray window %08x to x=%d\n",
 415                  trayclient->win, output->rect.w - (clients * (font.height + 2)));
 416             uint32_t x = output->rect.w - (clients * (font.height + 2));
 417             xcb_configure_window(xcb_connection,
 418                                  trayclient->win,
 419                                  XCB_CONFIG_WINDOW_X,
 420                                  &x);
 421         }
 422     }
 423 }
 424
 425 /*
 426  * Handles ClientMessages (messages sent from another client directly to us).
 427  *
 428  * At the moment, only the tray window will receive client messages. All
 429  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 430  *
 431  */
 432 static void handle_client_message(xcb_client_message_event_t* event) {
 433     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 434         event->format == 32) {
 435         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 436         /* event->data.data32[0] is the timestamp */
 437         uint32_t op = event->data.data32[1];
 438         uint32_t mask;
 439         uint32_t values[2];
 440         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 441             xcb_window_t client = event->data.data32[2];
 442
 443             /* Listen for PropertyNotify events to get the most recent value of
 444              * the XEMBED_MAPPED atom, also listen for UnmapNotify events */
 445             mask = XCB_CW_EVENT_MASK;
 446             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE |
 447                         XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 448             xcb_change_window_attributes(xcb_connection,
 449                                          client,
 450                                          mask,
 451                                          values);
 452
 453             /* Request the _XEMBED_INFO property. The XEMBED specification
 454              * (which is referred by the tray specification) says this *has* to
 455              * be set, but VLC does not set it… */
 456             bool map_it = true;
 457             int xe_version = 1;
 458             xcb_get_property_cookie_t xembedc;
 459             xcb_generic_error_t *error;
 460             xembedc = xcb_get_property(xcb_connection,
 461                                        0,
 462                                        client,
 463                                        atoms[_XEMBED_INFO],
 464                                        XCB_GET_PROPERTY_TYPE_ANY,
 465                                        0,
 466                                        2 * 32);
 467
 468             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 469                                                                        xembedc,
 470                                                                        &error);
 471             if (error != NULL) {
 472                 ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
 473                      error->error_code);
 474                 free(error);
 475                 return;
 476             }
 477             if (xembedr != NULL && xembedr->length != 0) {
 478                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 479                 uint32_t *xembed = xcb_get_property_value(xembedr);
 480                 DLOG("xembed version = %d\n", xembed[0]);
 481                 DLOG("xembed flags = %d\n", xembed[1]);
 482                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 483                 xe_version = xembed[0];
 484                 if (xe_version > 1)
 485                     xe_version = 1;
 486                 free(xembedr);
 487             } else {
 488                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 489             }
 490
 491             DLOG("X window %08x requested docking\n", client);
 492             i3_output *walk, *output = NULL;
 493             SLIST_FOREACH(walk, outputs, slist) {
 494                 if (!walk->active)
 495                     continue;
 496                 if (config.tray_output) {
 497                     if ((strcasecmp(walk->name, config.tray_output) != 0) &&
 498                         (!walk->primary || strcasecmp("primary", config.tray_output) != 0))
 499                         continue;
 500                 }
 501
 502                 DLOG("using output %s\n", walk->name);
 503                 output = walk;
 504                 break;
 505             }
 506             /* In case of tray_output == primary and there is no primary output
 507              * configured, we fall back to the first available output. */
 508             if (output == NULL &&
 509                 config.tray_output &&
 510                 strcasecmp("primary", config.tray_output) == 0) {
 511                 SLIST_FOREACH(walk, outputs, slist) {
 512                     if (!walk->active)
 513                         continue;
 514                     DLOG("Falling back to output %s because no primary output is configured\n", walk->name);
 515                     output = walk;
 516                     break;
 517                 }
 518             }
 519             if (output == NULL) {
 520                 ELOG("No output found\n");
 521                 return;
 522             }
 523             xcb_reparent_window(xcb_connection,
 524                                 client,
 525                                 output->bar,
 526                                 output->rect.w - font.height - 2,
 527                                 2);
 528             /* We reconfigure the window to use a reasonable size. The systray
 529              * specification explicitly says:
 530              *   Tray icons may be assigned any size by the system tray, and
 531              *   should do their best to cope with any size effectively
 532              */
 533             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 534             values[0] = font.height;
 535             values[1] = font.height;
 536             xcb_configure_window(xcb_connection,
 537                                  client,
 538                                  mask,
 539                                  values);
 540
 541             /* send the XEMBED_EMBEDDED_NOTIFY message */
 542             void *event = scalloc(32);
 543             xcb_client_message_event_t *ev = event;
 544             ev->response_type = XCB_CLIENT_MESSAGE;
 545             ev->window = client;
 546             ev->type = atoms[_XEMBED];
 547             ev->format = 32;
 548             ev->data.data32[0] = XCB_CURRENT_TIME;
 549             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 550             ev->data.data32[2] = output->bar;
 551             ev->data.data32[3] = xe_version;
 552             xcb_send_event(xcb_connection,
 553                            0,
 554                            client,
 555                            XCB_EVENT_MASK_NO_EVENT,
 556                            (char*)ev);
 557             free(event);
 558
 559             /* Put the client inside the save set. Upon termination (whether
 560              * killed or normal exit does not matter) of i3bar, these clients
 561              * will be correctly reparented to their most closest living
 562              * ancestor. Without this, tray icons might die when i3bar
 563              * exits/crashes. */
 564             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 565
 566             if (map_it) {
 567                 DLOG("Mapping dock client\n");
 568                 xcb_map_window(xcb_connection, client);
 569             } else {
 570                 DLOG("Not mapping dock client yet\n");
 571             }
 572             trayclient *tc = smalloc(sizeof(trayclient));
 573             tc->win = client;
 574             tc->mapped = map_it;
 575             tc->xe_version = xe_version;
 576             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 577
 578             /* Trigger an update to copy the statusline text to the appropriate
 579              * position */
 580             configure_trayclients();
 581             draw_bars(false);
 582         }
 583     }
 584 }
 585
 586 /*
 587  * Handles UnmapNotify events. These events happen when a tray window unmaps
 588  * itself. We then update our data structure
 589  *
 590  */
 591 static void handle_unmap_notify(xcb_unmap_notify_event_t* event) {
 592     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 593
 594     i3_output *walk;
 595     SLIST_FOREACH(walk, outputs, slist) {
 596         if (!walk->active)
 597             continue;
 598         DLOG("checking output %s\n", walk->name);
 599         trayclient *trayclient;
 600         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 601             if (trayclient->win != event->window)
 602                 continue;
 603
 604             DLOG("Removing tray client with window ID %08x\n", event->window);
 605             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 606
 607             /* Trigger an update, we now have more space for the statusline */
 608             configure_trayclients();
 609             draw_bars(false);
 610             return;
 611         }
 612     }
 613 }
 614
 615 /*
 616  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 617  * handled, which tells us whether a dock client should be mapped or unmapped.
 618  *
 619  */
 620 static void handle_property_notify(xcb_property_notify_event_t *event) {
 621     DLOG("PropertyNotify\n");
 622     if (event->atom == atoms[_XEMBED_INFO] &&
 623         event->state == XCB_PROPERTY_NEW_VALUE) {
 624         DLOG("xembed_info updated\n");
 625         trayclient *trayclient = NULL, *walk;
 626         i3_output *o_walk;
 627         SLIST_FOREACH(o_walk, outputs, slist) {
 628             if (!o_walk->active)
 629                 continue;
 630
 631             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 632                 if (walk->win != event->window)
 633                     continue;
 634                 trayclient = walk;
 635                 break;
 636             }
 637
 638             if (trayclient)
 639                 break;
 640         }
 641         if (!trayclient) {
 642             ELOG("PropertyNotify received for unknown window %08x\n",
 643                  event->window);
 644             return;
 645         }
 646         xcb_get_property_cookie_t xembedc;
 647         xembedc = xcb_get_property_unchecked(xcb_connection,
 648                                              0,
 649                                              trayclient->win,
 650                                              atoms[_XEMBED_INFO],
 651                                              XCB_GET_PROPERTY_TYPE_ANY,
 652                                              0,
 653                                              2 * 32);
 654
 655         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 656                                                                    xembedc,
 657                                                                    NULL);
 658         if (xembedr == NULL || xembedr->length == 0) {
 659             DLOG("xembed_info unset\n");
 660             return;
 661         }
 662
 663         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 664         uint32_t *xembed = xcb_get_property_value(xembedr);
 665         DLOG("xembed version = %d\n", xembed[0]);
 666         DLOG("xembed flags = %d\n", xembed[1]);
 667         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 668         DLOG("map-state now %d\n", map_it);
 669         if (trayclient->mapped && !map_it) {
 670             /* need to unmap the window */
 671             xcb_unmap_window(xcb_connection, trayclient->win);
 672             trayclient->mapped = map_it;
 673             configure_trayclients();
 674             draw_bars(false);
 675         } else if (!trayclient->mapped && map_it) {
 676             /* need to map the window */
 677             xcb_map_window(xcb_connection, trayclient->win);
 678             trayclient->mapped = map_it;
 679             configure_trayclients();
 680             draw_bars(false);
 681         }
 682         free(xembedr);
 683     }
 684 }
 685
 686 /*
 687  * Handle ConfigureRequests by denying them and sending the client a
 688  * ConfigureNotify with its actual size.
 689  *
 690  */
 691 static void handle_configure_request(xcb_configure_request_event_t *event) {
 692     DLOG("ConfigureRequest for window = %08x\n", event->window);
 693
 694     trayclient *trayclient;
 695     i3_output *output;
 696     SLIST_FOREACH(output, outputs, slist) {
 697         if (!output->active)
 698             continue;
 699
 700         int clients = 0;
 701         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 702             if (!trayclient->mapped)
 703                 continue;
 704             clients++;
 705
 706             if (trayclient->win != event->window)
 707                 continue;
 708
 709             xcb_rectangle_t rect;
 710             rect.x = output->rect.w - (clients * (font.height + 2));
 711             rect.y = 2;
 712             rect.width = font.height;
 713             rect.height = font.height;
 714
 715             DLOG("This is a tray window. x = %d\n", rect.x);
 716             fake_configure_notify(xcb_connection, rect, event->window, 0);
 717             return;
 718         }
 719     }
 720
 721     DLOG("WARNING: Could not find corresponding tray window.\n");
 722 }
 723
 724 /*
 725  * This function is called immediately before the main loop locks. We flush xcb
 726  * then (and only then)
 727  *
 728  */
 729 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 730     xcb_flush(xcb_connection);
 731 }
 732
 733 /*
 734  * This function is called immediately after the main loop locks, so when one
 735  * of the watchers registered an event.
 736  * We check whether an X-Event arrived and handle it.
 737  *
 738  */
 739 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 740     xcb_generic_event_t *event;
 741
 742     if (xcb_connection_has_error(xcb_connection)) {
 743         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
 744         exit(1);
 745     }
 746
 747     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
 748         switch (event->response_type & ~0x80) {
 749             case XCB_EXPOSE:
 750                 /* Expose-events happen, when the window needs to be redrawn */
 751                 redraw_bars();
 752                 break;
 753             case XCB_BUTTON_PRESS:
 754                 /* Button-press-events are mouse-buttons clicked on one of our bars */
 755                 handle_button((xcb_button_press_event_t*) event);
 756                 break;
 757             case XCB_CLIENT_MESSAGE:
 758                 /* Client messages are used for client-to-client communication, for
 759                  * example system tray widgets talk to us directly via client messages. */
 760                 handle_client_message((xcb_client_message_event_t*) event);
 761                 break;
 762             case XCB_UNMAP_NOTIFY:
 763             case XCB_DESTROY_NOTIFY:
 764                 /* UnmapNotifies are received when a tray window unmaps itself */
 765                 handle_unmap_notify((xcb_unmap_notify_event_t*) event);
 766                 break;
 767             case XCB_PROPERTY_NOTIFY:
 768                 /* PropertyNotify */
 769                 handle_property_notify((xcb_property_notify_event_t*) event);
 770                 break;
 771             case XCB_CONFIGURE_REQUEST:
 772                 /* ConfigureRequest, sent by a tray child */
 773                 handle_configure_request((xcb_configure_request_event_t*) event);
 774                 break;
 775         }
 776         free(event);
 777     }
 778 }
 779
 780 /*
 781  * Dummy Callback. We only need this, so that the Prepare- and Check-Watchers
 782  * are triggered
 783  *
 784  */
 785 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 786 }
 787
 788 /*
 789  * We need to bind to the modifier per XKB. Sadly, XCB does not implement this
 790  *
 791  */
 792 void xkb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 793     XkbEvent ev;
 794     int modstate = 0;
 795
 796     DLOG("Got XKB-Event!\n");
 797
 798     while (XPending(xkb_dpy)) {
 799         XNextEvent(xkb_dpy, (XEvent*)&ev);
 800
 801         if (ev.type != xkb_event_base) {
 802             ELOG("No Xkb-Event!\n");
 803             continue;
 804         }
 805
 806         if (ev.any.xkb_type != XkbStateNotify) {
 807             ELOG("No State Notify!\n");
 808             continue;
 809         }
 810
 811         unsigned int mods = ev.state.mods;
 812         modstate = mods & config.modifier;
 813     }
 814
 815 #define DLOGMOD(modmask, status, barfunc) \
 816     do { \
 817         switch (modmask) { \
 818             case ShiftMask: \
 819                 DLOG("ShiftMask got " #status "!\n"); \
 820                 break; \
 821             case ControlMask: \
 822                 DLOG("ControlMask got " #status "!\n"); \
 823                 break; \
 824             case Mod1Mask: \
 825                 DLOG("Mod1Mask got " #status "!\n"); \
 826                 break; \
 827             case Mod2Mask: \
 828                 DLOG("Mod2Mask got " #status "!\n"); \
 829                 break; \
 830             case Mod3Mask: \
 831                 DLOG("Mod3Mask got " #status "!\n"); \
 832                 break; \
 833             case Mod4Mask: \
 834                 DLOG("Mod4Mask got " #status "!\n"); \
 835                 break; \
 836             case Mod5Mask: \
 837                 DLOG("Mod5Mask got " #status "!\n"); \
 838                 break; \
 839         } \
 840         barfunc(); \
 841     } while (0)
 842
 843     if (modstate != mod_pressed) {
 844         if (modstate == 0) {
 845             DLOGMOD(config.modifier, released, hide_bars);
 846         } else {
 847             DLOGMOD(config.modifier, pressed, unhide_bars);
 848         }
 849         mod_pressed = modstate;
 850     }
 851
 852 #undef DLOGMOD
 853 }
 854
 855 /*
 856  * Early initialization of the connection to X11: Everything which does not
 857  * depend on 'config'.
 858  *
 859  */
 860 char *init_xcb_early() {
 861     /* FIXME: xcb_connect leaks Memory */
 862     xcb_connection = xcb_connect(NULL, &screen);
 863     if (xcb_connection_has_error(xcb_connection)) {
 864         ELOG("Cannot open display\n");
 865         exit(EXIT_FAILURE);
 866     }
 867     conn = xcb_connection;
 868     DLOG("Connected to xcb\n");
 869
 870     /* We have to request the atoms we need */
 871     #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
 872     #include "xcb_atoms.def"
 873
 874     root_screen = xcb_aux_get_screen(xcb_connection, screen);
 875     xcb_root = root_screen->root;
 876
 877     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
 878      * this way, we can choose to crop it */
 879     uint32_t mask = XCB_GC_FOREGROUND;
 880     uint32_t vals[] = { colors.bar_bg, colors.bar_bg };
 881
 882     statusline_clear = xcb_generate_id(xcb_connection);
 883     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 884                                                                statusline_clear,
 885                                                                xcb_root,
 886                                                                mask,
 887                                                                vals);
 888
 889     statusline_ctx = xcb_generate_id(xcb_connection);
 890     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 891                                                             statusline_ctx,
 892                                                             xcb_root,
 893                                                             0,
 894                                                             NULL);
 895
 896     statusline_pm = xcb_generate_id(xcb_connection);
 897     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
 898                                                                root_screen->root_depth,
 899                                                                statusline_pm,
 900                                                                xcb_root,
 901                                                                root_screen->width_in_pixels,
 902                                                                root_screen->height_in_pixels);
 903
 904
 905     /* The various Watchers to communicate with xcb */
 906     xcb_io = smalloc(sizeof(ev_io));
 907     xcb_prep = smalloc(sizeof(ev_prepare));
 908     xcb_chk = smalloc(sizeof(ev_check));
 909
 910     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
 911     ev_prepare_init(xcb_prep, &xcb_prep_cb);
 912     ev_check_init(xcb_chk, &xcb_chk_cb);
 913
 914     ev_io_start(main_loop, xcb_io);
 915     ev_prepare_start(main_loop, xcb_prep);
 916     ev_check_start(main_loop, xcb_chk);
 917
 918     /* Now we get the atoms and save them in a nice data structure */
 919     get_atoms();
 920
 921     xcb_get_property_cookie_t path_cookie;
 922     path_cookie = xcb_get_property_unchecked(xcb_connection,
 923                                    0,
 924                                    xcb_root,
 925                                    atoms[I3_SOCKET_PATH],
 926                                    XCB_GET_PROPERTY_TYPE_ANY,
 927                                    0, PATH_MAX);
 928
 929     /* We check, if i3 set its socket-path */
 930     xcb_get_property_reply_t *path_reply = xcb_get_property_reply(xcb_connection,
 931                                                                   path_cookie,
 932                                                                   NULL);
 933     char *path = NULL;
 934     if (path_reply) {
 935         int len = xcb_get_property_value_length(path_reply);
 936         if (len != 0) {
 937             path = strndup(xcb_get_property_value(path_reply), len);
 938         }
 939     }
 940
 941
 942     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
 943         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
 944         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
 945         exit(EXIT_FAILURE);
 946     }
 947
 948     return path;
 949 }
 950
 951 /*
 952  * Initialization which depends on 'config' being usable. Called after the
 953  * configuration has arrived.
 954  *
 955  */
 956 void init_xcb_late(char *fontname) {
 957     if (fontname == NULL)
 958         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
 959
 960     /* Load the font */
 961     font = load_font(fontname, true);
 962     set_font(&font);
 963     DLOG("Calculated Font-height: %d\n", font.height);
 964
 965     xcb_flush(xcb_connection);
 966
 967     /* To grab modifiers without blocking other applications from receiving key-events
 968      * involving that modifier, we sadly have to use xkb which is not yet fully supported
 969      * in xcb */
 970     if (config.hide_on_modifier) {
 971         int xkb_major, xkb_minor, xkb_errbase, xkb_err;
 972         xkb_major = XkbMajorVersion;
 973         xkb_minor = XkbMinorVersion;
 974
 975         xkb_dpy = XkbOpenDisplay(NULL,
 976                                  &xkb_event_base,
 977                                  &xkb_errbase,
 978                                  &xkb_major,
 979                                  &xkb_minor,
 980                                  &xkb_err);
 981
 982         if (xkb_dpy == NULL) {
 983             ELOG("No XKB!\n");
 984             exit(EXIT_FAILURE);
 985         }
 986
 987         if (fcntl(ConnectionNumber(xkb_dpy), F_SETFD, FD_CLOEXEC) == -1) {
 988             ELOG("Could not set FD_CLOEXEC on xkbdpy: %s\n", strerror(errno));
 989             exit(EXIT_FAILURE);
 990         }
 991
 992         int i1;
 993         if (!XkbQueryExtension(xkb_dpy, &i1, &xkb_event_base, &xkb_errbase, &xkb_major, &xkb_minor)) {
 994             ELOG("XKB not supported by X-server!\n");
 995             exit(EXIT_FAILURE);
 996         }
 997
 998         if (!XkbSelectEvents(xkb_dpy, XkbUseCoreKbd, XkbStateNotifyMask, XkbStateNotifyMask)) {
 999             ELOG("Could not grab Key!\n");
1000             exit(EXIT_FAILURE);
1001         }
1002
1003         xkb_io = smalloc(sizeof(ev_io));
1004         ev_io_init(xkb_io, &xkb_io_cb, ConnectionNumber(xkb_dpy), EV_READ);
1005         ev_io_start(main_loop, xkb_io);
1006         XFlush(xkb_dpy);
1007     }
1008 }
1009
1010 /*
1011  * Inform clients waiting for a new _NET_SYSTEM_TRAY that we took the
1012  * selection.
1013  *
1014  */
1015 static void send_tray_clientmessage(void) {
1016     uint8_t buffer[32] = { 0 };
1017     xcb_client_message_event_t *ev = (xcb_client_message_event_t*)buffer;
1018
1019     ev->response_type = XCB_CLIENT_MESSAGE;
1020     ev->window = xcb_root;
1021     ev->type = atoms[MANAGER];
1022     ev->format = 32;
1023     ev->data.data32[0] = XCB_CURRENT_TIME;
1024     ev->data.data32[1] = tray_reply->atom;
1025     ev->data.data32[2] = selwin;
1026
1027     xcb_send_event(xcb_connection,
1028                    0,
1029                    xcb_root,
1030                    0xFFFFFF,
1031                    (char*)buffer);
1032 }
1033
1034
1035 /*
1036  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
1037  * for the X11 display we are running on, then acquiring the selection for this
1038  * atom. Afterwards, tray clients will send ClientMessages to our window.
1039  *
1040  */
1041 void init_tray(void) {
1042     DLOG("Initializing system tray functionality\n");
1043     /* request the tray manager atom for the X11 display we are running on */
1044     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
1045     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
1046     xcb_intern_atom_cookie_t tray_cookie;
1047     if (tray_reply == NULL)
1048         tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
1049
1050     /* tray support: we need a window to own the selection */
1051     selwin = xcb_generate_id(xcb_connection);
1052     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
1053     uint32_t selval[] = { 1 };
1054     xcb_create_window(xcb_connection,
1055                       root_screen->root_depth,
1056                       selwin,
1057                       xcb_root,
1058                       -1, -1,
1059                       1, 1,
1060                       0,
1061                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
1062                       root_screen->root_visual,
1063                       selmask,
1064                       selval);
1065
1066     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
1067     /* set the atoms */
1068     xcb_change_property(xcb_connection,
1069                         XCB_PROP_MODE_REPLACE,
1070                         selwin,
1071                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1072                         XCB_ATOM_CARDINAL,
1073                         32,
1074                         1,
1075                         &orientation);
1076
1077     init_tray_colors();
1078
1079     if (tray_reply == NULL) {
1080         if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1081             ELOG("Could not get atom %s\n", atomname);
1082             exit(EXIT_FAILURE);
1083         }
1084     }
1085
1086     xcb_set_selection_owner(xcb_connection,
1087                             selwin,
1088                             tray_reply->atom,
1089                             XCB_CURRENT_TIME);
1090
1091     /* Verify that we have the selection */
1092     xcb_get_selection_owner_cookie_t selcookie;
1093     xcb_get_selection_owner_reply_t *selreply;
1094
1095     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1096     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1097         ELOG("Could not get selection owner for %s\n", atomname);
1098         exit(EXIT_FAILURE);
1099     }
1100
1101     if (selreply->owner != selwin) {
1102         ELOG("Could not set the %s selection. " \
1103              "Maybe another tray is already running?\n", atomname);
1104         /* NOTE that this error is not fatal. We just can’t provide tray
1105          * functionality */
1106         free(selreply);
1107         return;
1108     }
1109
1110     send_tray_clientmessage();
1111 }
1112
1113 /*
1114  * We need to set the _NET_SYSTEM_TRAY_COLORS atom on the tray selection window
1115  * to make GTK+ 3 applets with Symbolic Icons visible. If the colors are unset,
1116  * they assume a light background.
1117  * See also https://bugzilla.gnome.org/show_bug.cgi?id=679591
1118  *
1119  */
1120 void init_tray_colors(void) {
1121     /* Convert colors.bar_fg (#rrggbb) to 16-bit RGB */
1122     const char *bar_fg = (config.colors.bar_fg ? config.colors.bar_fg : "#FFFFFF");
1123
1124     DLOG("Setting bar_fg = %s as _NET_SYSTEM_TRAY_COLORS\n", bar_fg);
1125
1126     char strgroups[3][3] = {{bar_fg[1], bar_fg[2], '\0'},
1127                             {bar_fg[3], bar_fg[4], '\0'},
1128                             {bar_fg[5], bar_fg[6], '\0'}};
1129     const uint8_t r = strtol(strgroups[0], NULL, 16);
1130     const uint8_t g = strtol(strgroups[1], NULL, 16);
1131     const uint8_t b = strtol(strgroups[2], NULL, 16);
1132
1133     const uint16_t r16 = ((uint16_t)r << 8) | r;
1134     const uint16_t g16 = ((uint16_t)g << 8) | g;
1135     const uint16_t b16 = ((uint16_t)b << 8) | b;
1136
1137     const uint32_t tray_colors[12] = {
1138         r16, g16, b16, /* foreground color */
1139         r16, g16, b16, /* error color */
1140         r16, g16, b16, /* warning color */
1141         r16, g16, b16, /* success color */
1142     };
1143
1144     xcb_change_property(xcb_connection,
1145                         XCB_PROP_MODE_REPLACE,
1146                         selwin,
1147                         atoms[_NET_SYSTEM_TRAY_COLORS],
1148                         XCB_ATOM_CARDINAL,
1149                         32,
1150                         12,
1151                         tray_colors);
1152 }
1153
1154 /*
1155  * Cleanup the xcb-stuff.
1156  * Called once, before the program terminates.
1157  *
1158  */
1159 void clean_xcb(void) {
1160     i3_output *o_walk;
1161     free_workspaces();
1162     SLIST_FOREACH(o_walk, outputs, slist) {
1163         destroy_window(o_walk);
1164         FREE(o_walk->trayclients);
1165         FREE(o_walk->workspaces);
1166         FREE(o_walk->name);
1167     }
1168     FREE_SLIST(outputs, i3_output);
1169     FREE(outputs);
1170
1171     xcb_flush(xcb_connection);
1172     xcb_disconnect(xcb_connection);
1173
1174     ev_check_stop(main_loop, xcb_chk);
1175     ev_prepare_stop(main_loop, xcb_prep);
1176     ev_io_stop(main_loop, xcb_io);
1177
1178     FREE(xcb_chk);
1179     FREE(xcb_prep);
1180     FREE(xcb_io);
1181 }
1182
1183 /*
1184  * Get the earlier requested atoms and save them in the prepared data structure
1185  *
1186  */
1187 void get_atoms(void) {
1188     xcb_intern_atom_reply_t *reply;
1189     #define ATOM_DO(name) reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1190         if (reply == NULL) { \
1191             ELOG("Could not get atom %s\n", #name); \
1192             exit(EXIT_FAILURE); \
1193         } \
1194         atoms[name] = reply->atom; \
1195         free(reply);
1196
1197     #include "xcb_atoms.def"
1198     DLOG("Got Atoms\n");
1199 }
1200
1201 /*
1202  * Reparents all tray clients of the specified output to the root window. This
1203  * is either used when shutting down, when an output appears (xrandr --output
1204  * VGA1 --off) or when the primary output changes.
1205  *
1206  * Applications using the tray will start the protocol from the beginning again
1207  * afterwards.
1208  *
1209  */
1210 void kick_tray_clients(i3_output *output) {
1211     if (TAILQ_EMPTY(output->trayclients))
1212         return;
1213
1214     trayclient *trayclient;
1215     while (!TAILQ_EMPTY(output->trayclients)) {
1216         trayclient = TAILQ_FIRST(output->trayclients);
1217         /* Unmap, then reparent (to root) the tray client windows */
1218         xcb_unmap_window(xcb_connection, trayclient->win);
1219         xcb_reparent_window(xcb_connection,
1220                             trayclient->win,
1221                             xcb_root,
1222                             0,
1223                             0);
1224
1225         /* We remove the trayclient right here. We might receive an UnmapNotify
1226          * event afterwards, but better safe than sorry. */
1227         TAILQ_REMOVE(output->trayclients, trayclient, tailq);
1228     }
1229
1230     /* Fake a DestroyNotify so that Qt re-adds tray icons.
1231      * We cannot actually destroy the window because then Qt will not restore
1232      * its event mask on the new window. */
1233     uint8_t buffer[32] = { 0 };
1234     xcb_destroy_notify_event_t *event = (xcb_destroy_notify_event_t*)buffer;
1235
1236     event->response_type = XCB_DESTROY_NOTIFY;
1237     event->event = selwin;
1238     event->window = selwin;
1239
1240     xcb_send_event(conn, false, selwin, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char*)event);
1241
1242     send_tray_clientmessage();
1243 }
1244
1245 /*
1246  * Destroy the bar of the specified output
1247  *
1248  */
1249 void destroy_window(i3_output *output) {
1250     if (output == NULL) {
1251         return;
1252     }
1253     if (output->bar == XCB_NONE) {
1254         return;
1255     }
1256
1257     kick_tray_clients(output);
1258     xcb_destroy_window(xcb_connection, output->bar);
1259     output->bar = XCB_NONE;
1260 }
1261
1262 /*
1263  * Reallocate the statusline-buffer
1264  *
1265  */
1266 void realloc_sl_buffer(void) {
1267     DLOG("Re-allocating statusline-buffer, statusline_width = %d, root_screen->width_in_pixels = %d\n",
1268          statusline_width, root_screen->width_in_pixels);
1269     xcb_free_pixmap(xcb_connection, statusline_pm);
1270     statusline_pm = xcb_generate_id(xcb_connection);
1271     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1272                                                                root_screen->root_depth,
1273                                                                statusline_pm,
1274                                                                xcb_root,
1275                                                                MAX(root_screen->width_in_pixels, statusline_width),
1276                                                                root_screen->height_in_pixels);
1277
1278     uint32_t mask = XCB_GC_FOREGROUND;
1279     uint32_t vals[2] = { colors.bar_bg, colors.bar_bg };
1280     xcb_free_gc(xcb_connection, statusline_clear);
1281     statusline_clear = xcb_generate_id(xcb_connection);
1282     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1283                                                                statusline_clear,
1284                                                                xcb_root,
1285                                                                mask,
1286                                                                vals);
1287
1288     mask |= XCB_GC_BACKGROUND;
1289     vals[0] = colors.bar_fg;
1290     statusline_ctx = xcb_generate_id(xcb_connection);
1291     xcb_free_gc(xcb_connection, statusline_ctx);
1292     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1293                                                             statusline_ctx,
1294                                                             xcb_root,
1295                                                             mask,
1296                                                             vals);
1297
1298     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
1299         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
1300         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
1301         exit(EXIT_FAILURE);
1302     }
1303
1304 }
1305
1306 /*
1307  * Reconfigure all bars and create new bars for recently activated outputs
1308  *
1309  */
1310 void reconfig_windows(void) {
1311     uint32_t mask;
1312     uint32_t values[5];
1313     static bool tray_configured = false;
1314
1315     i3_output *walk;
1316     SLIST_FOREACH(walk, outputs, slist) {
1317         if (!walk->active) {
1318             /* If an output is not active, we destroy its bar */
1319             /* FIXME: Maybe we rather want to unmap? */
1320             DLOG("Destroying window for output %s\n", walk->name);
1321             destroy_window(walk);
1322             continue;
1323         }
1324         if (walk->bar == XCB_NONE) {
1325             DLOG("Creating Window for output %s\n", walk->name);
1326
1327             walk->bar = xcb_generate_id(xcb_connection);
1328             walk->buffer = xcb_generate_id(xcb_connection);
1329             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1330             /* Black background */
1331             values[0] = colors.bar_bg;
1332             /* If hide_on_modifier is set, i3 is not supposed to manage our bar-windows */
1333             values[1] = config.hide_on_modifier;
1334             /* We enable the following EventMask fields:
1335              * EXPOSURE, to get expose events (we have to re-draw then)
1336              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1337              *                        child windows use ConfigureWindow
1338              * BUTTON_PRESS, to handle clicks on the workspace buttons
1339              * */
1340             values[2] = XCB_EVENT_MASK_EXPOSURE |
1341                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
1342             if (!config.disable_ws) {
1343                 values[2] |= XCB_EVENT_MASK_BUTTON_PRESS;
1344             }
1345             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1346                                                                      root_screen->root_depth,
1347                                                                      walk->bar,
1348                                                                      xcb_root,
1349                                                                      walk->rect.x, walk->rect.y + walk->rect.h - font.height - 6,
1350                                                                      walk->rect.w, font.height + 6,
1351                                                                      0,
1352                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1353                                                                      root_screen->root_visual,
1354                                                                      mask,
1355                                                                      values);
1356
1357             /* The double-buffer we use to render stuff off-screen */
1358             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1359                                                                     root_screen->root_depth,
1360                                                                     walk->buffer,
1361                                                                     walk->bar,
1362                                                                     walk->rect.w,
1363                                                                     walk->rect.h);
1364
1365             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1366             xcb_void_cookie_t class_cookie;
1367             class_cookie = xcb_change_property(xcb_connection,
1368                                                XCB_PROP_MODE_REPLACE,
1369                                                walk->bar,
1370                                                XCB_ATOM_WM_CLASS,
1371                                                XCB_ATOM_STRING,
1372                                                8,
1373                                                (strlen("i3bar") + 1) * 2,
1374                                                "i3bar\0i3bar\0");
1375
1376             char *name;
1377             if (asprintf(&name, "i3bar for output %s", walk->name) == -1)
1378                 err(EXIT_FAILURE, "asprintf()");
1379             xcb_void_cookie_t name_cookie;
1380             name_cookie = xcb_change_property(xcb_connection,
1381                                               XCB_PROP_MODE_REPLACE,
1382                                               walk->bar,
1383                                               XCB_ATOM_WM_NAME,
1384                                               XCB_ATOM_STRING,
1385                                               8,
1386                                               strlen(name),
1387                                               name);
1388             free(name);
1389
1390             /* We want dock-windows (for now). When override_redirect is set, i3 is ignoring
1391              * this one */
1392             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1393                                                                 XCB_PROP_MODE_REPLACE,
1394                                                                 walk->bar,
1395                                                                 atoms[_NET_WM_WINDOW_TYPE],
1396                                                                 XCB_ATOM_ATOM,
1397                                                                 32,
1398                                                                 1,
1399                                                                 (unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1400
1401             /* We need to tell i3, where to reserve space for i3bar */
1402             /* left, right, top, bottom, left_start_y, left_end_y,
1403              * right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x,
1404              * bottom_end_x */
1405             /* A local struct to save the strut_partial property */
1406             struct {
1407                 uint32_t left;
1408                 uint32_t right;
1409                 uint32_t top;
1410                 uint32_t bottom;
1411                 uint32_t left_start_y;
1412                 uint32_t left_end_y;
1413                 uint32_t right_start_y;
1414                 uint32_t right_end_y;
1415                 uint32_t top_start_x;
1416                 uint32_t top_end_x;
1417                 uint32_t bottom_start_x;
1418                 uint32_t bottom_end_x;
1419             } __attribute__((__packed__)) strut_partial = {0,};
1420             switch (config.position) {
1421                 case POS_NONE:
1422                     break;
1423                 case POS_TOP:
1424                     strut_partial.top = font.height + 6;
1425                     strut_partial.top_start_x = walk->rect.x;
1426                     strut_partial.top_end_x = walk->rect.x + walk->rect.w;
1427                     break;
1428                 case POS_BOT:
1429                     strut_partial.bottom = font.height + 6;
1430                     strut_partial.bottom_start_x = walk->rect.x;
1431                     strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
1432                     break;
1433             }
1434             xcb_void_cookie_t strut_cookie = xcb_change_property(xcb_connection,
1435                                                                  XCB_PROP_MODE_REPLACE,
1436                                                                  walk->bar,
1437                                                                  atoms[_NET_WM_STRUT_PARTIAL],
1438                                                                  XCB_ATOM_CARDINAL,
1439                                                                  32,
1440                                                                  12,
1441                                                                  &strut_partial);
1442
1443             /* We also want a graphics-context for the bars (it defines the properties
1444              * with which we draw to them) */
1445             walk->bargc = xcb_generate_id(xcb_connection);
1446             xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
1447                                                                 walk->bargc,
1448                                                                 walk->bar,
1449                                                                 0,
1450                                                                 NULL);
1451
1452             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1453             xcb_void_cookie_t map_cookie;
1454             if (!config.hide_on_modifier) {
1455                 map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1456             }
1457
1458             if (xcb_request_failed(win_cookie,   "Could not create window") ||
1459                 xcb_request_failed(pm_cookie,    "Could not create pixmap") ||
1460                 xcb_request_failed(dock_cookie,  "Could not set dock mode") ||
1461                 xcb_request_failed(class_cookie, "Could not set WM_CLASS")  ||
1462                 xcb_request_failed(name_cookie,  "Could not set WM_NAME")   ||
1463                 xcb_request_failed(strut_cookie, "Could not set strut")     ||
1464                 xcb_request_failed(gc_cookie,    "Could not create graphical context") ||
1465                 (!config.hide_on_modifier && xcb_request_failed(map_cookie, "Could not map window"))) {
1466                 exit(EXIT_FAILURE);
1467             }
1468
1469             if (!tray_configured &&
1470                 (!config.tray_output ||
1471                  strcasecmp("none", config.tray_output) != 0)) {
1472                 init_tray();
1473                 tray_configured = true;
1474             }
1475         } else {
1476             /* We already have a bar, so we just reconfigure it */
1477             mask = XCB_CONFIG_WINDOW_X |
1478                    XCB_CONFIG_WINDOW_Y |
1479                    XCB_CONFIG_WINDOW_WIDTH |
1480                    XCB_CONFIG_WINDOW_HEIGHT |
1481                    XCB_CONFIG_WINDOW_STACK_MODE;
1482             values[0] = walk->rect.x;
1483             values[1] = walk->rect.y + walk->rect.h - font.height - 6;
1484             values[2] = walk->rect.w;
1485             values[3] = font.height + 6;
1486             values[4] = XCB_STACK_MODE_ABOVE;
1487
1488             DLOG("Destroying buffer for output %s\n", walk->name);
1489             xcb_free_pixmap(xcb_connection, walk->buffer);
1490
1491             DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1492             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1493                                                                         walk->bar,
1494                                                                         mask,
1495                                                                         values);
1496
1497             DLOG("Recreating buffer for output %s\n", walk->name);
1498             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1499                                                                     root_screen->root_depth,
1500                                                                     walk->buffer,
1501                                                                     walk->bar,
1502                                                                     walk->rect.w,
1503                                                                     walk->rect.h);
1504
1505             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window")) {
1506                 exit(EXIT_FAILURE);
1507             }
1508             if (xcb_request_failed(pm_cookie,  "Could not create pixmap")) {
1509                 exit(EXIT_FAILURE);
1510             }
1511         }
1512     }
1513 }
1514
1515 /*
1516  * Render the bars, with buttons and statusline
1517  *
1518  */
1519 void draw_bars(bool unhide) {
1520     DLOG("Drawing Bars...\n");
1521     int i = 1;
1522
1523     refresh_statusline();
1524
1525     static char *last_urgent_ws = NULL;
1526     bool walks_away = true;
1527
1528     i3_output *outputs_walk;
1529     SLIST_FOREACH(outputs_walk, outputs, slist) {
1530         if (!outputs_walk->active) {
1531             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1532             continue;
1533         }
1534         if (outputs_walk->bar == XCB_NONE) {
1535             /* Oh shit, an active output without an own bar. Create it now! */
1536             reconfig_windows();
1537         }
1538         /* First things first: clear the backbuffer */
1539         uint32_t color = colors.bar_bg;
1540         xcb_change_gc(xcb_connection,
1541                       outputs_walk->bargc,
1542                       XCB_GC_FOREGROUND,
1543                       &color);
1544         xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font.height + 6 };
1545         xcb_poly_fill_rectangle(xcb_connection,
1546                                 outputs_walk->buffer,
1547                                 outputs_walk->bargc,
1548                                 1,
1549                                 &rect);
1550
1551         if (!TAILQ_EMPTY(&statusline_head)) {
1552             DLOG("Printing statusline!\n");
1553
1554             /* Luckily we already prepared a seperate pixmap containing the rendered
1555              * statusline, we just have to copy the relevant parts to the relevant
1556              * position */
1557             trayclient *trayclient;
1558             int traypx = 0;
1559             TAILQ_FOREACH(trayclient, outputs_walk->trayclients, tailq) {
1560                 if (!trayclient->mapped)
1561                     continue;
1562                 /* We assume the tray icons are quadratic (we use the font
1563                  * *height* as *width* of the icons) because we configured them
1564                  * like this. */
1565                 traypx += font.height + 2;
1566             }
1567             /* Add 2px of padding if there are any tray icons */
1568             if (traypx > 0)
1569                 traypx += 2;
1570             xcb_copy_area(xcb_connection,
1571                           statusline_pm,
1572                           outputs_walk->buffer,
1573                           outputs_walk->bargc,
1574                           MAX(0, (int16_t)(statusline_width - outputs_walk->rect.w + 4)), 0,
1575                           MAX(0, (int16_t)(outputs_walk->rect.w - statusline_width - traypx - 4)), 3,
1576                           MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font.height);
1577         }
1578
1579         if (config.disable_ws) {
1580             continue;
1581         }
1582
1583         i3_ws *ws_walk;
1584
1585         TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1586             DLOG("Drawing Button for WS %s at x = %d, len = %d\n", i3string_as_utf8(ws_walk->name), i, ws_walk->name_width);
1587             uint32_t fg_color = colors.inactive_ws_fg;
1588             uint32_t bg_color = colors.inactive_ws_bg;
1589             uint32_t border_color = colors.inactive_ws_border;
1590             if (ws_walk->visible) {
1591                 if (!ws_walk->focused) {
1592                     fg_color = colors.active_ws_fg;
1593                     bg_color = colors.active_ws_bg;
1594                     border_color = colors.active_ws_border;
1595                 } else {
1596                     fg_color = colors.focus_ws_fg;
1597                     bg_color = colors.focus_ws_bg;
1598                     border_color = colors.focus_ws_border;
1599                     if (last_urgent_ws && strcmp(i3string_as_utf8(ws_walk->name), last_urgent_ws) == 0)
1600                         walks_away = false;
1601                 }
1602             }
1603             if (ws_walk->urgent) {
1604                 DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
1605                 fg_color = colors.urgent_ws_fg;
1606                 bg_color = colors.urgent_ws_bg;
1607                 border_color = colors.urgent_ws_border;
1608                 unhide = true;
1609                 if (!ws_walk->focused) {
1610                     FREE(last_urgent_ws);
1611                     last_urgent_ws = sstrdup(i3string_as_utf8(ws_walk->name));
1612                 }
1613             }
1614             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1615             uint32_t vals_border[] = { border_color, border_color };
1616             xcb_change_gc(xcb_connection,
1617                           outputs_walk->bargc,
1618                           mask,
1619                           vals_border);
1620             xcb_rectangle_t rect_border = { i, 1, ws_walk->name_width + 10, font.height + 4 };
1621             xcb_poly_fill_rectangle(xcb_connection,
1622                                     outputs_walk->buffer,
1623                                     outputs_walk->bargc,
1624                                     1,
1625                                     &rect_border);
1626             uint32_t vals[] = { bg_color, bg_color };
1627             xcb_change_gc(xcb_connection,
1628                           outputs_walk->bargc,
1629                           mask,
1630                           vals);
1631             xcb_rectangle_t rect = { i + 1, 2, ws_walk->name_width + 8, font.height + 2 };
1632             xcb_poly_fill_rectangle(xcb_connection,
1633                                     outputs_walk->buffer,
1634                                     outputs_walk->bargc,
1635                                     1,
1636                                     &rect);
1637             set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1638             draw_text(ws_walk->name, outputs_walk->buffer, outputs_walk->bargc, i + 5, 3, ws_walk->name_width);
1639             i += 10 + ws_walk->name_width + 1;
1640
1641         }
1642
1643         if (binding.name) {
1644
1645             uint32_t fg_color = colors.urgent_ws_fg;
1646             uint32_t bg_color = colors.urgent_ws_bg;
1647             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1648
1649             uint32_t vals_border[] = { colors.urgent_ws_border, colors.urgent_ws_border };
1650             xcb_change_gc(xcb_connection,
1651                           outputs_walk->bargc,
1652                           mask,
1653                           vals_border);
1654             xcb_rectangle_t rect_border = { i, 1, binding.width + 10, font.height + 4 };
1655             xcb_poly_fill_rectangle(xcb_connection,
1656                                     outputs_walk->buffer,
1657                                     outputs_walk->bargc,
1658                                     1,
1659                                     &rect_border);
1660
1661             uint32_t vals[] = { bg_color, bg_color };
1662             xcb_change_gc(xcb_connection,
1663                           outputs_walk->bargc,
1664                           mask,
1665                           vals);
1666             xcb_rectangle_t rect = { i + 1, 2, binding.width + 8, font.height + 2 };
1667             xcb_poly_fill_rectangle(xcb_connection,
1668                                     outputs_walk->buffer,
1669                                     outputs_walk->bargc,
1670                                     1,
1671                                     &rect);
1672
1673             set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1674             draw_text(binding.name, outputs_walk->buffer, outputs_walk->bargc, i + 5, 3, binding.width);
1675         }
1676
1677         i = 0;
1678     }
1679
1680     if (!mod_pressed) {
1681         if (unhide) {
1682             /* The urgent-hint should get noticed, so we unhide the bars shortly */
1683             unhide_bars();
1684         } else if (walks_away) {
1685             FREE(last_urgent_ws);
1686             hide_bars();
1687         }
1688     }
1689
1690     redraw_bars();
1691 }
1692
1693 /*
1694  * Redraw the bars, i.e. simply copy the buffer to the barwindow
1695  *
1696  */
1697 void redraw_bars(void) {
1698     i3_output *outputs_walk;
1699     SLIST_FOREACH(outputs_walk, outputs, slist) {
1700         if (!outputs_walk->active) {
1701             continue;
1702         }
1703         xcb_copy_area(xcb_connection,
1704                       outputs_walk->buffer,
1705                       outputs_walk->bar,
1706                       outputs_walk->bargc,
1707                       0, 0,
1708                       0, 0,
1709                       outputs_walk->rect.w,
1710                       outputs_walk->rect.h);
1711         xcb_flush(xcb_connection);
1712     }
1713 }
1714
1715 /*
1716  * Set the current binding mode
1717  *
1718  */
1719 void set_current_mode(struct mode *current) {
1720     I3STRING_FREE(binding.name);
1721     binding = *current;
1722     return;
1723 }