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 Axel Wagner and contributors (see also: LICENSE)
   6  *
   7  * xcb.c: Communicating with X
   8  *
   9  */
  10 #include <xcb/xcb.h>
  11 #include <xcb/xkb.h>
  12 #include <xcb/xproto.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 /* selection window for tray support */
  54 static xcb_window_t selwin = XCB_NONE;
  55 static xcb_intern_atom_reply_t *tray_reply = NULL;
  56
  57 /* This is needed for integration with libi3 */
  58 xcb_connection_t *conn;
  59
  60 /* The font we'll use */
  61 static i3Font font;
  62
  63 /* Icon size (based on font size) */
  64 int icon_size;
  65
  66 /* Overall height of the bar (based on font size) */
  67 int bar_height;
  68
  69 /* These are only relevant for XKB, which we only need for grabbing modifiers */
  70 int xkb_base;
  71 int mod_pressed = 0;
  72
  73 /* Because the statusline is the same on all outputs, we have
  74  * global buffer to render it on */
  75 xcb_gcontext_t statusline_ctx;
  76 xcb_gcontext_t statusline_clear;
  77 xcb_pixmap_t statusline_pm;
  78 uint32_t statusline_width;
  79
  80 /* Event watchers, to interact with the user */
  81 ev_prepare *xcb_prep;
  82 ev_check *xcb_chk;
  83 ev_io *xcb_io;
  84 ev_io *xkb_io;
  85
  86 /* The name of current binding mode */
  87 static mode binding;
  88
  89 /* Indicates whether a new binding mode was recently activated */
  90 bool activated_mode = false;
  91
  92 /* The parsed colors */
  93 struct xcb_colors_t {
  94     uint32_t bar_fg;
  95     uint32_t bar_bg;
  96     uint32_t sep_fg;
  97     uint32_t active_ws_fg;
  98     uint32_t active_ws_bg;
  99     uint32_t active_ws_border;
 100     uint32_t inactive_ws_fg;
 101     uint32_t inactive_ws_bg;
 102     uint32_t inactive_ws_border;
 103     uint32_t urgent_ws_bg;
 104     uint32_t urgent_ws_fg;
 105     uint32_t urgent_ws_border;
 106     uint32_t focus_ws_bg;
 107     uint32_t focus_ws_fg;
 108     uint32_t focus_ws_border;
 109     uint32_t binding_mode_bg;
 110     uint32_t binding_mode_fg;
 111     uint32_t binding_mode_border;
 112 };
 113 struct xcb_colors_t colors;
 114
 115 /* Horizontal offset between a workspace label and button borders */
 116 static const int ws_hoff_px = 4;
 117
 118 /* Vertical offset between a workspace label and button borders */
 119 static const int ws_voff_px = 3;
 120
 121 /* Offset between two workspace buttons */
 122 static const int ws_spacing_px = 1;
 123
 124 /* Offset between the statusline and 1) workspace buttons on the left
 125  *                                   2) the tray or screen edge on the right */
 126 static const int sb_hoff_px = 4;
 127
 128 /* Additional offset between the tray and the statusline, if the tray is not empty */
 129 static const int tray_loff_px = 2;
 130
 131 /* Padding around the tray icons */
 132 static const int tray_spacing_px = 2;
 133
 134 /* Vertical offset between the bar and a separator */
 135 static const int sep_voff_px = 4;
 136
 137 /* We define xcb_request_failed as a macro to include the relevant line number */
 138 #define xcb_request_failed(cookie, err_msg) _xcb_request_failed(cookie, err_msg, __LINE__)
 139 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
 140     xcb_generic_error_t *err;
 141     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
 142         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
 143         return err->error_code;
 144     }
 145     return 0;
 146 }
 147
 148 uint32_t get_sep_offset(struct status_block *block) {
 149     if (!block->no_separator && block->sep_block_width > 0)
 150         return block->sep_block_width / 2 + block->sep_block_width % 2;
 151     return 0;
 152 }
 153
 154 int get_tray_width(struct tc_head *trayclients) {
 155     trayclient *trayclient;
 156     int tray_width = 0;
 157     TAILQ_FOREACH_REVERSE(trayclient, trayclients, tc_head, tailq) {
 158         if (!trayclient->mapped)
 159             continue;
 160         tray_width += icon_size + logical_px(tray_spacing_px);
 161     }
 162     if (tray_width > 0)
 163         tray_width += logical_px(tray_loff_px);
 164     return tray_width;
 165 }
 166
 167 /*
 168  * Draws a separator for the given block if necessary.
 169  *
 170  */
 171 static void draw_separator(uint32_t x, struct status_block *block) {
 172     uint32_t sep_offset = get_sep_offset(block);
 173     if (TAILQ_NEXT(block, blocks) == NULL || sep_offset == 0)
 174         return;
 175
 176     uint32_t center_x = x - sep_offset;
 177     if (config.separator_symbol == NULL) {
 178         /* Draw a classic one pixel, vertical separator. */
 179         uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_LINE_WIDTH;
 180         uint32_t values[] = {colors.sep_fg, colors.bar_bg, logical_px(1)};
 181         xcb_change_gc(xcb_connection, statusline_ctx, mask, values);
 182         xcb_poly_line(xcb_connection, XCB_COORD_MODE_ORIGIN, statusline_pm, statusline_ctx, 2,
 183                       (xcb_point_t[]){{center_x, logical_px(sep_voff_px)},
 184                                       {center_x, bar_height - logical_px(sep_voff_px)}});
 185     } else {
 186         /* Draw a custom separator. */
 187         uint32_t separator_x = MAX(x - block->sep_block_width, center_x - separator_symbol_width / 2);
 188         set_font_colors(statusline_ctx, colors.sep_fg, colors.bar_bg);
 189         draw_text(config.separator_symbol, statusline_pm, statusline_ctx,
 190                   separator_x, logical_px(ws_voff_px), x - separator_x);
 191     }
 192 }
 193
 194 /*
 195  * Redraws the statusline to the buffer
 196  *
 197  */
 198 void refresh_statusline(bool use_short_text) {
 199     struct status_block *block;
 200
 201     uint32_t old_statusline_width = statusline_width;
 202     statusline_width = 0;
 203
 204     /* Predict the text width of all blocks (in pixels). */
 205     TAILQ_FOREACH(block, &statusline_head, blocks) {
 206         /* Try to use the shorter text if necessary and possible. */
 207         if (use_short_text && block->short_text != NULL) {
 208             I3STRING_FREE(block->full_text);
 209             block->full_text = i3string_copy(block->short_text);
 210         }
 211
 212         if (i3string_get_num_bytes(block->full_text) == 0)
 213             continue;
 214
 215         block->width = predict_text_width(block->full_text);
 216
 217         /* Compute offset and append for text aligment in min_width. */
 218         if (block->min_width <= block->width) {
 219             block->x_offset = 0;
 220             block->x_append = 0;
 221         } else {
 222             uint32_t padding_width = block->min_width - block->width;
 223             switch (block->align) {
 224                 case ALIGN_LEFT:
 225                     block->x_append = padding_width;
 226                     break;
 227                 case ALIGN_RIGHT:
 228                     block->x_offset = padding_width;
 229                     break;
 230                 case ALIGN_CENTER:
 231                     block->x_offset = padding_width / 2;
 232                     block->x_append = padding_width / 2 + padding_width % 2;
 233                     break;
 234             }
 235         }
 236
 237         /* If this is not the last block, add some pixels for a separator. */
 238         if (TAILQ_NEXT(block, blocks) != NULL)
 239             statusline_width += block->sep_block_width;
 240
 241         statusline_width += block->width + block->x_offset + block->x_append;
 242     }
 243
 244     /* If the statusline is bigger than our screen we need to make sure that
 245      * the pixmap provides enough space, so re-allocate if the width grew */
 246     if (statusline_width > root_screen->width_in_pixels &&
 247         statusline_width > old_statusline_width)
 248         realloc_sl_buffer();
 249
 250     /* Clear the statusline pixmap. */
 251     xcb_rectangle_t rect = {0, 0, MAX(root_screen->width_in_pixels, statusline_width), bar_height};
 252     xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_clear, 1, &rect);
 253
 254     /* Draw the text of each block. */
 255     uint32_t x = 0;
 256     TAILQ_FOREACH(block, &statusline_head, blocks) {
 257         if (i3string_get_num_bytes(block->full_text) == 0)
 258             continue;
 259         uint32_t fg_color;
 260
 261         /* If this block is urgent, draw it with the defined color and border. */
 262         if (block->urgent) {
 263             fg_color = colors.urgent_ws_fg;
 264
 265             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
 266
 267             /* Draw the background */
 268             uint32_t bg_color = colors.urgent_ws_bg;
 269             uint32_t bg_values[] = {bg_color, bg_color};
 270             xcb_change_gc(xcb_connection, statusline_ctx, mask, bg_values);
 271
 272             /* The urgent background “overshoots” by 2 px so that the text that
 273              * is printed onto it will not be look so cut off. */
 274             xcb_rectangle_t bg_rect = {x - logical_px(2), logical_px(1), block->width + logical_px(4), bar_height - logical_px(2)};
 275             xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_ctx, 1, &bg_rect);
 276         } else {
 277             fg_color = (block->color ? get_colorpixel(block->color) : colors.bar_fg);
 278         }
 279
 280         set_font_colors(statusline_ctx, fg_color, colors.bar_bg);
 281         draw_text(block->full_text, statusline_pm, statusline_ctx, x + block->x_offset, logical_px(ws_voff_px), block->width);
 282         x += block->width + block->sep_block_width + block->x_offset + block->x_append;
 283
 284         /* If this is not the last block, draw a separator. */
 285         draw_separator(x, block);
 286     }
 287 }
 288
 289 /*
 290  * Hides all bars (unmaps them)
 291  *
 292  */
 293 void hide_bars(void) {
 294     if ((config.hide_on_modifier == M_DOCK) || (config.hidden_state == S_SHOW && config.hide_on_modifier == M_HIDE)) {
 295         return;
 296     }
 297
 298     i3_output *walk;
 299     SLIST_FOREACH(walk, outputs, slist) {
 300         if (!walk->active) {
 301             continue;
 302         }
 303         xcb_unmap_window(xcb_connection, walk->bar);
 304     }
 305     stop_child();
 306 }
 307
 308 /*
 309  * Unhides all bars (maps them)
 310  *
 311  */
 312 void unhide_bars(void) {
 313     if (config.hide_on_modifier != M_HIDE) {
 314         return;
 315     }
 316
 317     i3_output *walk;
 318     xcb_void_cookie_t cookie;
 319     uint32_t mask;
 320     uint32_t values[5];
 321
 322     cont_child();
 323
 324     SLIST_FOREACH(walk, outputs, slist) {
 325         if (walk->bar == XCB_NONE) {
 326             continue;
 327         }
 328         mask = XCB_CONFIG_WINDOW_X |
 329                XCB_CONFIG_WINDOW_Y |
 330                XCB_CONFIG_WINDOW_WIDTH |
 331                XCB_CONFIG_WINDOW_HEIGHT |
 332                XCB_CONFIG_WINDOW_STACK_MODE;
 333         values[0] = walk->rect.x;
 334         if (config.position == POS_TOP)
 335             values[1] = walk->rect.y;
 336         else
 337             values[1] = walk->rect.y + walk->rect.h - bar_height;
 338         values[2] = walk->rect.w;
 339         values[3] = bar_height;
 340         values[4] = XCB_STACK_MODE_ABOVE;
 341         DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 342         cookie = xcb_configure_window_checked(xcb_connection,
 343                                               walk->bar,
 344                                               mask,
 345                                               values);
 346
 347         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 348             exit(EXIT_FAILURE);
 349         }
 350         xcb_map_window(xcb_connection, walk->bar);
 351     }
 352 }
 353
 354 /*
 355  * Parse the colors into a format that we can use
 356  *
 357  */
 358 void init_colors(const struct xcb_color_strings_t *new_colors) {
 359 #define PARSE_COLOR(name, def)                                                   \
 360     do {                                                                         \
 361         colors.name = get_colorpixel(new_colors->name ? new_colors->name : def); \
 362     } while (0)
 363     PARSE_COLOR(bar_fg, "#FFFFFF");
 364     PARSE_COLOR(bar_bg, "#000000");
 365     PARSE_COLOR(sep_fg, "#666666");
 366     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 367     PARSE_COLOR(active_ws_bg, "#333333");
 368     PARSE_COLOR(active_ws_border, "#333333");
 369     PARSE_COLOR(inactive_ws_fg, "#888888");
 370     PARSE_COLOR(inactive_ws_bg, "#222222");
 371     PARSE_COLOR(inactive_ws_border, "#333333");
 372     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 373     PARSE_COLOR(urgent_ws_bg, "#900000");
 374     PARSE_COLOR(urgent_ws_border, "#2f343a");
 375     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 376     PARSE_COLOR(focus_ws_bg, "#285577");
 377     PARSE_COLOR(focus_ws_border, "#4c7899");
 378 #undef PARSE_COLOR
 379
 380 #define PARSE_COLOR_FALLBACK(name, fallback)                                                 \
 381     do {                                                                                     \
 382         colors.name = new_colors->name ? get_colorpixel(new_colors->name) : colors.fallback; \
 383     } while (0)
 384
 385     /* For the binding mode indicator colors, we don't hardcode a default.
 386      * Instead, we fall back to urgent_ws_* colors. */
 387     PARSE_COLOR_FALLBACK(binding_mode_fg, urgent_ws_fg);
 388     PARSE_COLOR_FALLBACK(binding_mode_bg, urgent_ws_bg);
 389     PARSE_COLOR_FALLBACK(binding_mode_border, urgent_ws_border);
 390 #undef PARSE_COLOR_FALLBACK
 391
 392     init_tray_colors();
 393     xcb_flush(xcb_connection);
 394 }
 395
 396 /*
 397  * Handle a button press event (i.e. a mouse click on one of our bars).
 398  * We determine, whether the click occured on a workspace button or if the scroll-
 399  * wheel was used and change the workspace appropriately
 400  *
 401  */
 402 void handle_button(xcb_button_press_event_t *event) {
 403     /* Determine, which bar was clicked */
 404     i3_output *walk;
 405     xcb_window_t bar = event->event;
 406     SLIST_FOREACH(walk, outputs, slist) {
 407         if (walk->bar == bar) {
 408             break;
 409         }
 410     }
 411
 412     if (walk == NULL) {
 413         DLOG("Unknown bar clicked!\n");
 414         return;
 415     }
 416
 417     int32_t x = event->event_x >= 0 ? event->event_x : 0;
 418     int32_t original_x = x;
 419
 420     DLOG("Got button %d\n", event->detail);
 421
 422     int workspace_width = 0;
 423     i3_ws *cur_ws = NULL, *clicked_ws = NULL, *ws_walk;
 424
 425     TAILQ_FOREACH(ws_walk, walk->workspaces, tailq) {
 426         int w = 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
 427         if (x >= workspace_width && x <= workspace_width + w)
 428             clicked_ws = ws_walk;
 429         if (ws_walk->visible)
 430             cur_ws = ws_walk;
 431         workspace_width += w;
 432         if (TAILQ_NEXT(ws_walk, tailq) != NULL)
 433             workspace_width += logical_px(ws_spacing_px);
 434     }
 435
 436     if (x > workspace_width && child_want_click_events()) {
 437         /* If the child asked for click events,
 438          * check if a status block has been clicked. */
 439         int tray_width = get_tray_width(walk->trayclients);
 440         int block_x = 0, last_block_x;
 441         int offset = walk->rect.w - statusline_width - tray_width - logical_px(sb_hoff_px);
 442
 443         x = original_x - offset;
 444         if (x >= 0 && (size_t)x < statusline_width) {
 445             struct status_block *block;
 446             int sep_offset_remainder = 0;
 447
 448             TAILQ_FOREACH(block, &statusline_head, blocks) {
 449                 if (i3string_get_num_bytes(block->full_text) == 0)
 450                     continue;
 451
 452                 last_block_x = block_x;
 453                 block_x += block->width + block->x_offset + block->x_append + get_sep_offset(block) + sep_offset_remainder;
 454
 455                 if (x <= block_x && x >= last_block_x) {
 456                     send_block_clicked(event->detail, block->name, block->instance, event->root_x, event->root_y);
 457                     return;
 458                 }
 459
 460                 sep_offset_remainder = block->sep_block_width - get_sep_offset(block);
 461             }
 462         }
 463         x = original_x;
 464     }
 465
 466     if (cur_ws == NULL) {
 467         DLOG("No workspace active?\n");
 468         return;
 469     }
 470
 471     /* If a custom command was specified for this mouse button, it overrides
 472      * the default behavior. */
 473     mouse_command_t *command;
 474     TAILQ_FOREACH(command, &(config.mouse_commands), commands) {
 475         if (command->button != event->detail)
 476             continue;
 477
 478         i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, command->command);
 479         return;
 480     }
 481
 482     switch (event->detail) {
 483         case 4:
 484             /* Mouse wheel up. We select the previous ws, if any.
 485              * If there is no more workspace, don’t even send the workspace
 486              * command, otherwise (with workspace auto_back_and_forth) we’d end
 487              * up on the wrong workspace. */
 488             if (cur_ws == TAILQ_FIRST(walk->workspaces))
 489                 return;
 490
 491             cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 492             break;
 493         case 5:
 494             /* Mouse wheel down. We select the next ws, if any.
 495              * If there is no more workspace, don’t even send the workspace
 496              * command, otherwise (with workspace auto_back_and_forth) we’d end
 497              * up on the wrong workspace. */
 498             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
 499                 return;
 500
 501             cur_ws = TAILQ_NEXT(cur_ws, tailq);
 502             break;
 503         case 1:
 504             cur_ws = clicked_ws;
 505
 506             /* if no workspace was clicked, focus our currently visible
 507              * workspace if it is not already focused */
 508             if (cur_ws == NULL) {
 509                 TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 510                     if (cur_ws->visible && !cur_ws->focused)
 511                         break;
 512                 }
 513             }
 514
 515             /* if there is nothing to focus, we are done */
 516             if (cur_ws == NULL)
 517                 return;
 518
 519             break;
 520         default:
 521             return;
 522     }
 523
 524     /* To properly handle workspace names with double quotes in them, we need
 525      * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
 526      * first count the number of double quotes, then we allocate a large enough
 527      * buffer, then we copy character by character. */
 528     int num_quotes = 0;
 529     size_t namelen = 0;
 530     const char *utf8_name = cur_ws->canonical_name;
 531     for (const char *walk = utf8_name; *walk != '\0'; walk++) {
 532         if (*walk == '"' || *walk == '\\')
 533             num_quotes++;
 534         /* While we’re looping through the name anyway, we can save one
 535          * strlen(). */
 536         namelen++;
 537     }
 538
 539     const size_t len = namelen + strlen("workspace \"\"") + 1;
 540     char *buffer = scalloc(len + num_quotes);
 541     strncpy(buffer, "workspace \"", strlen("workspace \""));
 542     size_t inpos, outpos;
 543     for (inpos = 0, outpos = strlen("workspace \"");
 544          inpos < namelen;
 545          inpos++, outpos++) {
 546         if (utf8_name[inpos] == '"' || utf8_name[inpos] == '\\') {
 547             buffer[outpos] = '\\';
 548             outpos++;
 549         }
 550         buffer[outpos] = utf8_name[inpos];
 551     }
 552     buffer[outpos] = '"';
 553     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 554     free(buffer);
 555 }
 556
 557 /*
 558  * Handle visibility notifications: when none of the bars are visible, e.g.
 559  * if windows are in fullscreen on each output, suspend the child process.
 560  *
 561  */
 562 static void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
 563     bool visible = (event->state != XCB_VISIBILITY_FULLY_OBSCURED);
 564     int num_visible = 0;
 565     i3_output *output;
 566
 567     SLIST_FOREACH(output, outputs, slist) {
 568         if (!output->active) {
 569             continue;
 570         }
 571         if (output->bar == event->window) {
 572             if (output->visible == visible) {
 573                 return;
 574             }
 575             output->visible = visible;
 576         }
 577         num_visible += output->visible;
 578     }
 579
 580     if (num_visible == 0) {
 581         stop_child();
 582     } else if (num_visible == visible) {
 583         /* Wake the child only when transitioning from 0 to 1 visible bar.
 584          * We cannot transition from 0 to 2 or more visible bars at once since
 585          * visibility events are delivered to each window separately */
 586         cont_child();
 587     }
 588 }
 589
 590 /*
 591  * Adjusts the size of the tray window and alignment of the tray clients by
 592  * configuring their respective x coordinates. To be called when mapping or
 593  * unmapping a tray client window.
 594  *
 595  */
 596 static void configure_trayclients(void) {
 597     trayclient *trayclient;
 598     i3_output *output;
 599     SLIST_FOREACH(output, outputs, slist) {
 600         if (!output->active)
 601             continue;
 602
 603         int clients = 0;
 604         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 605             if (!trayclient->mapped)
 606                 continue;
 607             clients++;
 608
 609             DLOG("Configuring tray window %08x to x=%d\n",
 610                  trayclient->win, output->rect.w - (clients * (icon_size + logical_px(tray_spacing_px))));
 611             uint32_t x = output->rect.w - (clients * (icon_size + logical_px(tray_spacing_px)));
 612             xcb_configure_window(xcb_connection,
 613                                  trayclient->win,
 614                                  XCB_CONFIG_WINDOW_X,
 615                                  &x);
 616         }
 617     }
 618 }
 619
 620 /*
 621  * Handles ClientMessages (messages sent from another client directly to us).
 622  *
 623  * At the moment, only the tray window will receive client messages. All
 624  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 625  *
 626  */
 627 static void handle_client_message(xcb_client_message_event_t *event) {
 628     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 629         event->format == 32) {
 630         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 631         /* event->data.data32[0] is the timestamp */
 632         uint32_t op = event->data.data32[1];
 633         uint32_t mask;
 634         uint32_t values[2];
 635         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 636             xcb_window_t client = event->data.data32[2];
 637
 638             /* Listen for PropertyNotify events to get the most recent value of
 639              * the XEMBED_MAPPED atom, also listen for UnmapNotify events */
 640             mask = XCB_CW_EVENT_MASK;
 641             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE |
 642                         XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 643             xcb_change_window_attributes(xcb_connection,
 644                                          client,
 645                                          mask,
 646                                          values);
 647
 648             /* Request the _XEMBED_INFO property. The XEMBED specification
 649              * (which is referred by the tray specification) says this *has* to
 650              * be set, but VLC does not set it… */
 651             bool map_it = true;
 652             int xe_version = 1;
 653             xcb_get_property_cookie_t xembedc;
 654             xcb_generic_error_t *error;
 655             xembedc = xcb_get_property(xcb_connection,
 656                                        0,
 657                                        client,
 658                                        atoms[_XEMBED_INFO],
 659                                        XCB_GET_PROPERTY_TYPE_ANY,
 660                                        0,
 661                                        2 * 32);
 662
 663             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 664                                                                        xembedc,
 665                                                                        &error);
 666             if (error != NULL) {
 667                 ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
 668                      error->error_code);
 669                 free(error);
 670                 return;
 671             }
 672             if (xembedr != NULL && xembedr->length != 0) {
 673                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 674                 uint32_t *xembed = xcb_get_property_value(xembedr);
 675                 DLOG("xembed version = %d\n", xembed[0]);
 676                 DLOG("xembed flags = %d\n", xembed[1]);
 677                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 678                 xe_version = xembed[0];
 679                 if (xe_version > 1)
 680                     xe_version = 1;
 681                 free(xembedr);
 682             } else {
 683                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 684             }
 685
 686             DLOG("X window %08x requested docking\n", client);
 687             i3_output *walk, *output = NULL;
 688             SLIST_FOREACH(walk, outputs, slist) {
 689                 if (!walk->active)
 690                     continue;
 691                 if (config.tray_output) {
 692                     if ((strcasecmp(walk->name, config.tray_output) != 0) &&
 693                         (!walk->primary || strcasecmp("primary", config.tray_output) != 0))
 694                         continue;
 695                 }
 696
 697                 DLOG("using output %s\n", walk->name);
 698                 output = walk;
 699                 break;
 700             }
 701             /* In case of tray_output == primary and there is no primary output
 702              * configured, we fall back to the first available output. */
 703             if (output == NULL &&
 704                 config.tray_output &&
 705                 strcasecmp("primary", config.tray_output) == 0) {
 706                 SLIST_FOREACH(walk, outputs, slist) {
 707                     if (!walk->active)
 708                         continue;
 709                     DLOG("Falling back to output %s because no primary output is configured\n", walk->name);
 710                     output = walk;
 711                     break;
 712                 }
 713             }
 714             if (output == NULL) {
 715                 ELOG("No output found\n");
 716                 return;
 717             }
 718             xcb_reparent_window(xcb_connection,
 719                                 client,
 720                                 output->bar,
 721                                 output->rect.w - icon_size - logical_px(tray_spacing_px),
 722                                 logical_px(tray_spacing_px));
 723             /* We reconfigure the window to use a reasonable size. The systray
 724              * specification explicitly says:
 725              *   Tray icons may be assigned any size by the system tray, and
 726              *   should do their best to cope with any size effectively
 727              */
 728             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 729             values[0] = icon_size;
 730             values[1] = icon_size;
 731             xcb_configure_window(xcb_connection,
 732                                  client,
 733                                  mask,
 734                                  values);
 735
 736             /* send the XEMBED_EMBEDDED_NOTIFY message */
 737             void *event = scalloc(32);
 738             xcb_client_message_event_t *ev = event;
 739             ev->response_type = XCB_CLIENT_MESSAGE;
 740             ev->window = client;
 741             ev->type = atoms[_XEMBED];
 742             ev->format = 32;
 743             ev->data.data32[0] = XCB_CURRENT_TIME;
 744             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 745             ev->data.data32[2] = output->bar;
 746             ev->data.data32[3] = xe_version;
 747             xcb_send_event(xcb_connection,
 748                            0,
 749                            client,
 750                            XCB_EVENT_MASK_NO_EVENT,
 751                            (char *)ev);
 752             free(event);
 753
 754             /* Put the client inside the save set. Upon termination (whether
 755              * killed or normal exit does not matter) of i3bar, these clients
 756              * will be correctly reparented to their most closest living
 757              * ancestor. Without this, tray icons might die when i3bar
 758              * exits/crashes. */
 759             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 760
 761             trayclient *tc = smalloc(sizeof(trayclient));
 762             tc->win = client;
 763             tc->xe_version = xe_version;
 764             tc->mapped = false;
 765             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 766
 767             if (map_it) {
 768                 DLOG("Mapping dock client\n");
 769                 xcb_map_window(xcb_connection, client);
 770             } else {
 771                 DLOG("Not mapping dock client yet\n");
 772             }
 773             /* Trigger an update to copy the statusline text to the appropriate
 774              * position */
 775             configure_trayclients();
 776             draw_bars(false);
 777         }
 778     }
 779 }
 780
 781 /*
 782  * Handles DestroyNotify events by removing the tray client from the data
 783  * structure. According to the XEmbed protocol, this is one way for a tray
 784  * client to finish the protocol. After this event is received, there is no
 785  * further interaction with the tray client.
 786  *
 787  * See: http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
 788  *
 789  */
 790 static void handle_destroy_notify(xcb_destroy_notify_event_t *event) {
 791     DLOG("DestroyNotify for window = %08x, event = %08x\n", event->window, event->event);
 792
 793     i3_output *walk;
 794     SLIST_FOREACH(walk, outputs, slist) {
 795         if (!walk->active)
 796             continue;
 797         DLOG("checking output %s\n", walk->name);
 798         trayclient *trayclient;
 799         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 800             if (trayclient->win != event->window)
 801                 continue;
 802
 803             DLOG("Removing tray client with window ID %08x\n", event->window);
 804             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 805
 806             /* Trigger an update, we now have more space for the statusline */
 807             configure_trayclients();
 808             draw_bars(false);
 809             return;
 810         }
 811     }
 812 }
 813
 814 /*
 815  * Handles MapNotify events. These events happen when a tray client shows its
 816  * window. We respond by realigning the tray clients.
 817  *
 818  */
 819 static void handle_map_notify(xcb_map_notify_event_t *event) {
 820     DLOG("MapNotify for window = %08x, event = %08x\n", event->window, event->event);
 821
 822     i3_output *walk;
 823     SLIST_FOREACH(walk, outputs, slist) {
 824         if (!walk->active)
 825             continue;
 826         DLOG("checking output %s\n", walk->name);
 827         trayclient *trayclient;
 828         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 829             if (trayclient->win != event->window)
 830                 continue;
 831
 832             DLOG("Tray client mapped (window ID %08x). Adjusting tray.\n", event->window);
 833             trayclient->mapped = true;
 834
 835             /* Trigger an update, we now have more space for the statusline */
 836             configure_trayclients();
 837             draw_bars(false);
 838             return;
 839         }
 840     }
 841 }
 842 /*
 843  * Handles UnmapNotify events. These events happen when a tray client hides its
 844  * window. We respond by realigning the tray clients.
 845  *
 846  */
 847 static void handle_unmap_notify(xcb_unmap_notify_event_t *event) {
 848     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 849
 850     i3_output *walk;
 851     SLIST_FOREACH(walk, outputs, slist) {
 852         if (!walk->active)
 853             continue;
 854         DLOG("checking output %s\n", walk->name);
 855         trayclient *trayclient;
 856         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 857             if (trayclient->win != event->window)
 858                 continue;
 859
 860             DLOG("Tray client unmapped (window ID %08x). Adjusting tray.\n", event->window);
 861             trayclient->mapped = false;
 862
 863             /* Trigger an update, we now have more space for the statusline */
 864             configure_trayclients();
 865             draw_bars(false);
 866             return;
 867         }
 868     }
 869 }
 870
 871 /*
 872  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 873  * handled, which tells us whether a dock client should be mapped or unmapped.
 874  *
 875  */
 876 static void handle_property_notify(xcb_property_notify_event_t *event) {
 877     DLOG("PropertyNotify\n");
 878     if (event->atom == atoms[_XEMBED_INFO] &&
 879         event->state == XCB_PROPERTY_NEW_VALUE) {
 880         DLOG("xembed_info updated\n");
 881         trayclient *trayclient = NULL, *walk;
 882         i3_output *o_walk;
 883         SLIST_FOREACH(o_walk, outputs, slist) {
 884             if (!o_walk->active)
 885                 continue;
 886
 887             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 888                 if (walk->win != event->window)
 889                     continue;
 890                 trayclient = walk;
 891                 break;
 892             }
 893
 894             if (trayclient)
 895                 break;
 896         }
 897         if (!trayclient) {
 898             ELOG("PropertyNotify received for unknown window %08x\n",
 899                  event->window);
 900             return;
 901         }
 902         xcb_get_property_cookie_t xembedc;
 903         xembedc = xcb_get_property_unchecked(xcb_connection,
 904                                              0,
 905                                              trayclient->win,
 906                                              atoms[_XEMBED_INFO],
 907                                              XCB_GET_PROPERTY_TYPE_ANY,
 908                                              0,
 909                                              2 * 32);
 910
 911         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 912                                                                    xembedc,
 913                                                                    NULL);
 914         if (xembedr == NULL || xembedr->length == 0) {
 915             DLOG("xembed_info unset\n");
 916             return;
 917         }
 918
 919         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 920         uint32_t *xembed = xcb_get_property_value(xembedr);
 921         DLOG("xembed version = %d\n", xembed[0]);
 922         DLOG("xembed flags = %d\n", xembed[1]);
 923         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 924         DLOG("map state now %d\n", map_it);
 925         if (trayclient->mapped && !map_it) {
 926             /* need to unmap the window */
 927             xcb_unmap_window(xcb_connection, trayclient->win);
 928         } else if (!trayclient->mapped && map_it) {
 929             /* need to map the window */
 930             xcb_map_window(xcb_connection, trayclient->win);
 931         }
 932         free(xembedr);
 933     }
 934 }
 935
 936 /*
 937  * Handle ConfigureRequests by denying them and sending the client a
 938  * ConfigureNotify with its actual size.
 939  *
 940  */
 941 static void handle_configure_request(xcb_configure_request_event_t *event) {
 942     DLOG("ConfigureRequest for window = %08x\n", event->window);
 943
 944     trayclient *trayclient;
 945     i3_output *output;
 946     SLIST_FOREACH(output, outputs, slist) {
 947         if (!output->active)
 948             continue;
 949
 950         int clients = 0;
 951         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 952             if (!trayclient->mapped)
 953                 continue;
 954             clients++;
 955
 956             if (trayclient->win != event->window)
 957                 continue;
 958
 959             xcb_rectangle_t rect;
 960             rect.x = output->rect.w - (clients * (icon_size + logical_px(tray_spacing_px)));
 961             rect.y = logical_px(tray_spacing_px);
 962             rect.width = icon_size;
 963             rect.height = icon_size;
 964
 965             DLOG("This is a tray window. x = %d\n", rect.x);
 966             fake_configure_notify(xcb_connection, rect, event->window, 0);
 967             return;
 968         }
 969     }
 970
 971     DLOG("WARNING: Could not find corresponding tray window.\n");
 972 }
 973
 974 /*
 975  * This function is called immediately before the main loop locks. We flush xcb
 976  * then (and only then)
 977  *
 978  */
 979 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 980     xcb_flush(xcb_connection);
 981 }
 982
 983 /*
 984  * This function is called immediately after the main loop locks, so when one
 985  * of the watchers registered an event.
 986  * We check whether an X-Event arrived and handle it.
 987  *
 988  */
 989 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 990     xcb_generic_event_t *event;
 991
 992     if (xcb_connection_has_error(xcb_connection)) {
 993         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
 994         exit(1);
 995     }
 996
 997     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
 998         int type = (event->response_type & ~0x80);
 999
1000         if (type == xkb_base && xkb_base > -1) {
1001             DLOG("received an xkb event\n");
1002
1003             xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event;
1004             if (state->xkbType == XCB_XKB_STATE_NOTIFY) {
1005                 int modstate = state->mods & config.modifier;
1006
1007 #define DLOGMOD(modmask, status)                        \
1008     do {                                                \
1009         switch (modmask) {                              \
1010             case ShiftMask:                             \
1011                 DLOG("ShiftMask got " #status "!\n");   \
1012                 break;                                  \
1013             case ControlMask:                           \
1014                 DLOG("ControlMask got " #status "!\n"); \
1015                 break;                                  \
1016             case Mod1Mask:                              \
1017                 DLOG("Mod1Mask got " #status "!\n");    \
1018                 break;                                  \
1019             case Mod2Mask:                              \
1020                 DLOG("Mod2Mask got " #status "!\n");    \
1021                 break;                                  \
1022             case Mod3Mask:                              \
1023                 DLOG("Mod3Mask got " #status "!\n");    \
1024                 break;                                  \
1025             case Mod4Mask:                              \
1026                 DLOG("Mod4Mask got " #status "!\n");    \
1027                 break;                                  \
1028             case Mod5Mask:                              \
1029                 DLOG("Mod5Mask got " #status "!\n");    \
1030                 break;                                  \
1031         }                                               \
1032     } while (0)
1033
1034                 if (modstate != mod_pressed) {
1035                     if (modstate == 0) {
1036                         DLOGMOD(config.modifier, released);
1037                         if (!activated_mode)
1038                             hide_bars();
1039                     } else {
1040                         DLOGMOD(config.modifier, pressed);
1041                         activated_mode = false;
1042                         unhide_bars();
1043                     }
1044                     mod_pressed = modstate;
1045                 }
1046 #undef DLOGMOD
1047             }
1048
1049             free(event);
1050             continue;
1051         }
1052
1053         switch (type) {
1054             case XCB_VISIBILITY_NOTIFY:
1055                 /* Visibility change: a bar is [un]obscured by other window */
1056                 handle_visibility_notify((xcb_visibility_notify_event_t *)event);
1057                 break;
1058             case XCB_EXPOSE:
1059                 /* Expose-events happen, when the window needs to be redrawn */
1060                 redraw_bars();
1061                 break;
1062             case XCB_BUTTON_PRESS:
1063                 /* Button press events are mouse buttons clicked on one of our bars */
1064                 handle_button((xcb_button_press_event_t *)event);
1065                 break;
1066             case XCB_CLIENT_MESSAGE:
1067                 /* Client messages are used for client-to-client communication, for
1068                  * example system tray widgets talk to us directly via client messages. */
1069                 handle_client_message((xcb_client_message_event_t *)event);
1070                 break;
1071             case XCB_DESTROY_NOTIFY:
1072                 /* DestroyNotify signifies the end of the XEmbed protocol */
1073                 handle_destroy_notify((xcb_destroy_notify_event_t *)event);
1074                 break;
1075             case XCB_UNMAP_NOTIFY:
1076                 /* UnmapNotify is received when a tray client hides its window. */
1077                 handle_unmap_notify((xcb_unmap_notify_event_t *)event);
1078                 break;
1079             case XCB_MAP_NOTIFY:
1080                 handle_map_notify((xcb_map_notify_event_t *)event);
1081                 break;
1082             case XCB_PROPERTY_NOTIFY:
1083                 /* PropertyNotify */
1084                 handle_property_notify((xcb_property_notify_event_t *)event);
1085                 break;
1086             case XCB_CONFIGURE_REQUEST:
1087                 /* ConfigureRequest, sent by a tray child */
1088                 handle_configure_request((xcb_configure_request_event_t *)event);
1089                 break;
1090         }
1091         free(event);
1092     }
1093 }
1094
1095 /*
1096  * Dummy callback. We only need this, so that the prepare and check watchers
1097  * are triggered
1098  *
1099  */
1100 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
1101 }
1102
1103 /*
1104  * Early initialization of the connection to X11: Everything which does not
1105  * depend on 'config'.
1106  *
1107  */
1108 char *init_xcb_early() {
1109     /* FIXME: xcb_connect leaks memory */
1110     xcb_connection = xcb_connect(NULL, &screen);
1111     if (xcb_connection_has_error(xcb_connection)) {
1112         ELOG("Cannot open display\n");
1113         exit(EXIT_FAILURE);
1114     }
1115     conn = xcb_connection;
1116     DLOG("Connected to xcb\n");
1117
1118 /* We have to request the atoms we need */
1119 #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
1120 #include "xcb_atoms.def"
1121
1122     root_screen = xcb_aux_get_screen(xcb_connection, screen);
1123     xcb_root = root_screen->root;
1124
1125     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
1126      * this way, we can choose to crop it */
1127     uint32_t mask = XCB_GC_FOREGROUND;
1128     uint32_t vals[] = {colors.bar_bg, colors.bar_bg};
1129
1130     statusline_clear = xcb_generate_id(xcb_connection);
1131     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1132                                                                statusline_clear,
1133                                                                xcb_root,
1134                                                                mask,
1135                                                                vals);
1136
1137     statusline_ctx = xcb_generate_id(xcb_connection);
1138     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1139                                                             statusline_ctx,
1140                                                             xcb_root,
1141                                                             0,
1142                                                             NULL);
1143
1144     statusline_pm = xcb_generate_id(xcb_connection);
1145     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1146                                                                root_screen->root_depth,
1147                                                                statusline_pm,
1148                                                                xcb_root,
1149                                                                root_screen->width_in_pixels,
1150                                                                root_screen->height_in_pixels);
1151
1152     /* The various watchers to communicate with xcb */
1153     xcb_io = smalloc(sizeof(ev_io));
1154     xcb_prep = smalloc(sizeof(ev_prepare));
1155     xcb_chk = smalloc(sizeof(ev_check));
1156
1157     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
1158     ev_prepare_init(xcb_prep, &xcb_prep_cb);
1159     ev_check_init(xcb_chk, &xcb_chk_cb);
1160
1161     ev_io_start(main_loop, xcb_io);
1162     ev_prepare_start(main_loop, xcb_prep);
1163     ev_check_start(main_loop, xcb_chk);
1164
1165     /* Now we get the atoms and save them in a nice data structure */
1166     get_atoms();
1167
1168     char *path = root_atom_contents("I3_SOCKET_PATH", xcb_connection, screen);
1169
1170     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline buffer") ||
1171         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline buffer clearcontext") ||
1172         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline buffer context")) {
1173         exit(EXIT_FAILURE);
1174     }
1175
1176     return path;
1177 }
1178
1179 /*
1180  * Register for xkb keyevents. To grab modifiers without blocking other applications from receiving key events
1181  * involving that modifier, we sadly have to use xkb which is not yet fully supported
1182  * in xcb.
1183  *
1184  */
1185 void register_xkb_keyevents() {
1186     const xcb_query_extension_reply_t *extreply;
1187     extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
1188     if (!extreply->present) {
1189         ELOG("xkb is not present on this server\n");
1190         exit(EXIT_FAILURE);
1191     }
1192     DLOG("initializing xcb-xkb\n");
1193     xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
1194     xcb_xkb_select_events(conn,
1195                           XCB_XKB_ID_USE_CORE_KBD,
1196                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1197                           0,
1198                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1199                           0xff,
1200                           0xff,
1201                           NULL);
1202     xkb_base = extreply->first_event;
1203 }
1204
1205 /*
1206  * Deregister from xkb keyevents.
1207  *
1208  */
1209 void deregister_xkb_keyevents() {
1210     xcb_xkb_select_events(conn,
1211                           XCB_XKB_ID_USE_CORE_KBD,
1212                           0,
1213                           0,
1214                           0,
1215                           0xff,
1216                           0xff,
1217                           NULL);
1218 }
1219
1220 /*
1221  * Initialization which depends on 'config' being usable. Called after the
1222  * configuration has arrived.
1223  *
1224  */
1225 void init_xcb_late(char *fontname) {
1226     if (fontname == NULL)
1227         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
1228
1229     /* Load the font */
1230     font = load_font(fontname, true);
1231     set_font(&font);
1232     DLOG("Calculated font height: %d\n", font.height);
1233     bar_height = font.height + 2 * logical_px(ws_voff_px);
1234     icon_size = bar_height - 2 * logical_px(tray_spacing_px);
1235
1236     if (config.separator_symbol)
1237         separator_symbol_width = predict_text_width(config.separator_symbol);
1238
1239     xcb_flush(xcb_connection);
1240
1241     if (config.hide_on_modifier == M_HIDE)
1242         register_xkb_keyevents();
1243 }
1244
1245 /*
1246  * Inform clients waiting for a new _NET_SYSTEM_TRAY that we took the
1247  * selection.
1248  *
1249  */
1250 static void send_tray_clientmessage(void) {
1251     uint8_t buffer[32] = {0};
1252     xcb_client_message_event_t *ev = (xcb_client_message_event_t *)buffer;
1253
1254     ev->response_type = XCB_CLIENT_MESSAGE;
1255     ev->window = xcb_root;
1256     ev->type = atoms[MANAGER];
1257     ev->format = 32;
1258     ev->data.data32[0] = XCB_CURRENT_TIME;
1259     ev->data.data32[1] = tray_reply->atom;
1260     ev->data.data32[2] = selwin;
1261
1262     xcb_send_event(xcb_connection,
1263                    0,
1264                    xcb_root,
1265                    0xFFFFFF,
1266                    (char *)buffer);
1267 }
1268
1269 /*
1270  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
1271  * for the X11 display we are running on, then acquiring the selection for this
1272  * atom. Afterwards, tray clients will send ClientMessages to our window.
1273  *
1274  */
1275 void init_tray(void) {
1276     DLOG("Initializing system tray functionality\n");
1277     /* request the tray manager atom for the X11 display we are running on */
1278     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
1279     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
1280     xcb_intern_atom_cookie_t tray_cookie;
1281     if (tray_reply == NULL)
1282         tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
1283
1284     /* tray support: we need a window to own the selection */
1285     selwin = xcb_generate_id(xcb_connection);
1286     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
1287     uint32_t selval[] = {1};
1288     xcb_create_window(xcb_connection,
1289                       root_screen->root_depth,
1290                       selwin,
1291                       xcb_root,
1292                       -1, -1,
1293                       1, 1,
1294                       0,
1295                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
1296                       root_screen->root_visual,
1297                       selmask,
1298                       selval);
1299
1300     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
1301     /* set the atoms */
1302     xcb_change_property(xcb_connection,
1303                         XCB_PROP_MODE_REPLACE,
1304                         selwin,
1305                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1306                         XCB_ATOM_CARDINAL,
1307                         32,
1308                         1,
1309                         &orientation);
1310
1311     init_tray_colors();
1312
1313     if (tray_reply == NULL) {
1314         if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1315             ELOG("Could not get atom %s\n", atomname);
1316             exit(EXIT_FAILURE);
1317         }
1318     }
1319
1320     xcb_set_selection_owner(xcb_connection,
1321                             selwin,
1322                             tray_reply->atom,
1323                             XCB_CURRENT_TIME);
1324
1325     /* Verify that we have the selection */
1326     xcb_get_selection_owner_cookie_t selcookie;
1327     xcb_get_selection_owner_reply_t *selreply;
1328
1329     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1330     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1331         ELOG("Could not get selection owner for %s\n", atomname);
1332         exit(EXIT_FAILURE);
1333     }
1334
1335     if (selreply->owner != selwin) {
1336         ELOG("Could not set the %s selection. "
1337              "Maybe another tray is already running?\n",
1338              atomname);
1339         /* NOTE that this error is not fatal. We just can’t provide tray
1340          * functionality */
1341         free(selreply);
1342         return;
1343     }
1344
1345     send_tray_clientmessage();
1346 }
1347
1348 /*
1349  * We need to set the _NET_SYSTEM_TRAY_COLORS atom on the tray selection window
1350  * to make GTK+ 3 applets with symbolic icons visible. If the colors are unset,
1351  * they assume a light background.
1352  * See also https://bugzilla.gnome.org/show_bug.cgi?id=679591
1353  *
1354  */
1355 void init_tray_colors(void) {
1356     /* Convert colors.bar_fg (#rrggbb) to 16-bit RGB */
1357     const char *bar_fg = (config.colors.bar_fg ? config.colors.bar_fg : "#FFFFFF");
1358
1359     DLOG("Setting bar_fg = %s as _NET_SYSTEM_TRAY_COLORS\n", bar_fg);
1360
1361     char strgroups[3][3] = {{bar_fg[1], bar_fg[2], '\0'},
1362                             {bar_fg[3], bar_fg[4], '\0'},
1363                             {bar_fg[5], bar_fg[6], '\0'}};
1364     const uint8_t r = strtol(strgroups[0], NULL, 16);
1365     const uint8_t g = strtol(strgroups[1], NULL, 16);
1366     const uint8_t b = strtol(strgroups[2], NULL, 16);
1367
1368     const uint16_t r16 = ((uint16_t)r << 8) | r;
1369     const uint16_t g16 = ((uint16_t)g << 8) | g;
1370     const uint16_t b16 = ((uint16_t)b << 8) | b;
1371
1372     const uint32_t tray_colors[12] = {
1373         r16, g16, b16, /* foreground color */
1374         r16, g16, b16, /* error color */
1375         r16, g16, b16, /* warning color */
1376         r16, g16, b16, /* success color */
1377     };
1378
1379     xcb_change_property(xcb_connection,
1380                         XCB_PROP_MODE_REPLACE,
1381                         selwin,
1382                         atoms[_NET_SYSTEM_TRAY_COLORS],
1383                         XCB_ATOM_CARDINAL,
1384                         32,
1385                         12,
1386                         tray_colors);
1387 }
1388
1389 /*
1390  * Cleanup the xcb stuff.
1391  * Called once, before the program terminates.
1392  *
1393  */
1394 void clean_xcb(void) {
1395     i3_output *o_walk;
1396     free_workspaces();
1397     SLIST_FOREACH(o_walk, outputs, slist) {
1398         destroy_window(o_walk);
1399         FREE(o_walk->trayclients);
1400         FREE(o_walk->workspaces);
1401         FREE(o_walk->name);
1402     }
1403     FREE_SLIST(outputs, i3_output);
1404     FREE(outputs);
1405
1406     xcb_flush(xcb_connection);
1407     xcb_aux_sync(xcb_connection);
1408     xcb_disconnect(xcb_connection);
1409
1410     ev_check_stop(main_loop, xcb_chk);
1411     ev_prepare_stop(main_loop, xcb_prep);
1412     ev_io_stop(main_loop, xcb_io);
1413
1414     FREE(xcb_chk);
1415     FREE(xcb_prep);
1416     FREE(xcb_io);
1417 }
1418
1419 /*
1420  * Get the earlier requested atoms and save them in the prepared data structure
1421  *
1422  */
1423 void get_atoms(void) {
1424     xcb_intern_atom_reply_t *reply;
1425 #define ATOM_DO(name)                                                        \
1426     reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1427     if (reply == NULL) {                                                     \
1428         ELOG("Could not get atom %s\n", #name);                              \
1429         exit(EXIT_FAILURE);                                                  \
1430     }                                                                        \
1431     atoms[name] = reply->atom;                                               \
1432     free(reply);
1433
1434 #include "xcb_atoms.def"
1435     DLOG("Got atoms\n");
1436 }
1437
1438 /*
1439  * Reparents all tray clients of the specified output to the root window. This
1440  * is either used when shutting down, when an output appears (xrandr --output
1441  * VGA1 --off) or when the primary output changes.
1442  *
1443  * Applications using the tray will start the protocol from the beginning again
1444  * afterwards.
1445  *
1446  */
1447 void kick_tray_clients(i3_output *output) {
1448     if (TAILQ_EMPTY(output->trayclients))
1449         return;
1450
1451     trayclient *trayclient;
1452     while (!TAILQ_EMPTY(output->trayclients)) {
1453         trayclient = TAILQ_FIRST(output->trayclients);
1454         /* Unmap, then reparent (to root) the tray client windows */
1455         xcb_unmap_window(xcb_connection, trayclient->win);
1456         xcb_reparent_window(xcb_connection,
1457                             trayclient->win,
1458                             xcb_root,
1459                             0,
1460                             0);
1461
1462         /* We remove the trayclient right here. We might receive an UnmapNotify
1463          * event afterwards, but better safe than sorry. */
1464         TAILQ_REMOVE(output->trayclients, trayclient, tailq);
1465     }
1466
1467     /* Fake a DestroyNotify so that Qt re-adds tray icons.
1468      * We cannot actually destroy the window because then Qt will not restore
1469      * its event mask on the new window. */
1470     uint8_t buffer[32] = {0};
1471     xcb_destroy_notify_event_t *event = (xcb_destroy_notify_event_t *)buffer;
1472
1473     event->response_type = XCB_DESTROY_NOTIFY;
1474     event->event = selwin;
1475     event->window = selwin;
1476
1477     xcb_send_event(conn, false, selwin, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char *)event);
1478
1479     send_tray_clientmessage();
1480 }
1481
1482 /*
1483  * Destroy the bar of the specified output
1484  *
1485  */
1486 void destroy_window(i3_output *output) {
1487     if (output == NULL) {
1488         return;
1489     }
1490     if (output->bar == XCB_NONE) {
1491         return;
1492     }
1493
1494     kick_tray_clients(output);
1495     xcb_destroy_window(xcb_connection, output->bar);
1496     output->bar = XCB_NONE;
1497 }
1498
1499 /*
1500  * Reallocate the statusline buffer
1501  *
1502  */
1503 void realloc_sl_buffer(void) {
1504     DLOG("Re-allocating statusline buffer, statusline_width = %d, root_screen->width_in_pixels = %d\n",
1505          statusline_width, root_screen->width_in_pixels);
1506     xcb_free_pixmap(xcb_connection, statusline_pm);
1507     statusline_pm = xcb_generate_id(xcb_connection);
1508     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1509                                                                root_screen->root_depth,
1510                                                                statusline_pm,
1511                                                                xcb_root,
1512                                                                MAX(root_screen->width_in_pixels, statusline_width),
1513                                                                bar_height);
1514
1515     uint32_t mask = XCB_GC_FOREGROUND;
1516     uint32_t vals[2] = {colors.bar_bg, colors.bar_bg};
1517     xcb_free_gc(xcb_connection, statusline_clear);
1518     statusline_clear = xcb_generate_id(xcb_connection);
1519     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1520                                                                statusline_clear,
1521                                                                xcb_root,
1522                                                                mask,
1523                                                                vals);
1524
1525     mask |= XCB_GC_BACKGROUND;
1526     vals[0] = colors.bar_fg;
1527     xcb_free_gc(xcb_connection, statusline_ctx);
1528     statusline_ctx = xcb_generate_id(xcb_connection);
1529     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1530                                                             statusline_ctx,
1531                                                             xcb_root,
1532                                                             mask,
1533                                                             vals);
1534
1535     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline buffer") ||
1536         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline buffer clearcontext") ||
1537         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline buffer context")) {
1538         exit(EXIT_FAILURE);
1539     }
1540 }
1541
1542 /* Strut partial tells i3 where to reserve space for i3bar. This is determined
1543  * by the `position` bar config directive. */
1544 xcb_void_cookie_t config_strut_partial(i3_output *output) {
1545     /* A local struct to save the strut_partial property */
1546     struct {
1547         uint32_t left;
1548         uint32_t right;
1549         uint32_t top;
1550         uint32_t bottom;
1551         uint32_t left_start_y;
1552         uint32_t left_end_y;
1553         uint32_t right_start_y;
1554         uint32_t right_end_y;
1555         uint32_t top_start_x;
1556         uint32_t top_end_x;
1557         uint32_t bottom_start_x;
1558         uint32_t bottom_end_x;
1559     } __attribute__((__packed__)) strut_partial;
1560     memset(&strut_partial, 0, sizeof(strut_partial));
1561
1562     switch (config.position) {
1563         case POS_NONE:
1564             break;
1565         case POS_TOP:
1566             strut_partial.top = bar_height;
1567             strut_partial.top_start_x = output->rect.x;
1568             strut_partial.top_end_x = output->rect.x + output->rect.w;
1569             break;
1570         case POS_BOT:
1571             strut_partial.bottom = bar_height;
1572             strut_partial.bottom_start_x = output->rect.x;
1573             strut_partial.bottom_end_x = output->rect.x + output->rect.w;
1574             break;
1575     }
1576     return xcb_change_property(xcb_connection,
1577                                XCB_PROP_MODE_REPLACE,
1578                                output->bar,
1579                                atoms[_NET_WM_STRUT_PARTIAL],
1580                                XCB_ATOM_CARDINAL,
1581                                32,
1582                                12,
1583                                &strut_partial);
1584 }
1585
1586 /*
1587  * Reconfigure all bars and create new bars for recently activated outputs
1588  *
1589  */
1590 void reconfig_windows(bool redraw_bars) {
1591     uint32_t mask;
1592     uint32_t values[5];
1593     static bool tray_configured = false;
1594
1595     i3_output *walk;
1596     SLIST_FOREACH(walk, outputs, slist) {
1597         if (!walk->active) {
1598             /* If an output is not active, we destroy its bar */
1599             /* FIXME: Maybe we rather want to unmap? */
1600             DLOG("Destroying window for output %s\n", walk->name);
1601             destroy_window(walk);
1602             continue;
1603         }
1604         if (walk->bar == XCB_NONE) {
1605             DLOG("Creating window for output %s\n", walk->name);
1606
1607             walk->bar = xcb_generate_id(xcb_connection);
1608             walk->buffer = xcb_generate_id(xcb_connection);
1609             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1610             /* Black background */
1611             values[0] = colors.bar_bg;
1612             /* If hide_on_modifier is set to hide or invisible mode, i3 is not supposed to manage our bar windows */
1613             values[1] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1614             /* We enable the following EventMask fields:
1615              * EXPOSURE, to get expose events (we have to re-draw then)
1616              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1617              *                        child windows use ConfigureWindow
1618              * BUTTON_PRESS, to handle clicks on the workspace buttons
1619              * */
1620             values[2] = XCB_EVENT_MASK_EXPOSURE |
1621                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
1622                         XCB_EVENT_MASK_BUTTON_PRESS;
1623             if (config.hide_on_modifier == M_DOCK) {
1624                 /* If the bar is normally visible, catch visibility change events to suspend
1625                  * the status process when the bar is obscured by full-screened windows.  */
1626                 values[2] |= XCB_EVENT_MASK_VISIBILITY_CHANGE;
1627                 walk->visible = true;
1628             }
1629             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1630                                                                      root_screen->root_depth,
1631                                                                      walk->bar,
1632                                                                      xcb_root,
1633                                                                      walk->rect.x, walk->rect.y + walk->rect.h - bar_height,
1634                                                                      walk->rect.w, bar_height,
1635                                                                      0,
1636                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1637                                                                      root_screen->root_visual,
1638                                                                      mask,
1639                                                                      values);
1640
1641             /* The double-buffer we use to render stuff off-screen */
1642             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1643                                                                     root_screen->root_depth,
1644                                                                     walk->buffer,
1645                                                                     walk->bar,
1646                                                                     walk->rect.w,
1647                                                                     bar_height);
1648
1649             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1650             xcb_void_cookie_t class_cookie;
1651             class_cookie = xcb_change_property(xcb_connection,
1652                                                XCB_PROP_MODE_REPLACE,
1653                                                walk->bar,
1654                                                XCB_ATOM_WM_CLASS,
1655                                                XCB_ATOM_STRING,
1656                                                8,
1657                                                (strlen("i3bar") + 1) * 2,
1658                                                "i3bar\0i3bar\0");
1659
1660             char *name;
1661             if (asprintf(&name, "i3bar for output %s", walk->name) == -1)
1662                 err(EXIT_FAILURE, "asprintf()");
1663             xcb_void_cookie_t name_cookie;
1664             name_cookie = xcb_change_property(xcb_connection,
1665                                               XCB_PROP_MODE_REPLACE,
1666                                               walk->bar,
1667                                               XCB_ATOM_WM_NAME,
1668                                               XCB_ATOM_STRING,
1669                                               8,
1670                                               strlen(name),
1671                                               name);
1672             free(name);
1673
1674             /* We want dock windows (for now). When override_redirect is set, i3 is ignoring
1675              * this one */
1676             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1677                                                                 XCB_PROP_MODE_REPLACE,
1678                                                                 walk->bar,
1679                                                                 atoms[_NET_WM_WINDOW_TYPE],
1680                                                                 XCB_ATOM_ATOM,
1681                                                                 32,
1682                                                                 1,
1683                                                                 (unsigned char *)&atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1684
1685             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1686
1687             /* We also want a graphics context for the bars (it defines the properties
1688              * with which we draw to them) */
1689             walk->bargc = xcb_generate_id(xcb_connection);
1690             xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
1691                                                                 walk->bargc,
1692                                                                 walk->bar,
1693                                                                 0,
1694                                                                 NULL);
1695
1696             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1697             xcb_void_cookie_t map_cookie;
1698             if (config.hide_on_modifier == M_DOCK) {
1699                 map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1700             }
1701
1702             if (xcb_request_failed(win_cookie, "Could not create window") ||
1703                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1704                 xcb_request_failed(dock_cookie, "Could not set dock mode") ||
1705                 xcb_request_failed(class_cookie, "Could not set WM_CLASS") ||
1706                 xcb_request_failed(name_cookie, "Could not set WM_NAME") ||
1707                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1708                 xcb_request_failed(gc_cookie, "Could not create graphical context") ||
1709                 ((config.hide_on_modifier == M_DOCK) && xcb_request_failed(map_cookie, "Could not map window"))) {
1710                 exit(EXIT_FAILURE);
1711             }
1712
1713             const char *tray_output = (config.tray_output ? config.tray_output : SLIST_FIRST(outputs)->name);
1714             if (!tray_configured && strcasecmp(tray_output, "none") != 0) {
1715                 /* Configuration sanity check: ensure this i3bar instance handles the output on
1716                  * which the tray should appear (e.g. don’t initialize a tray if tray_output ==
1717                  * VGA-1 but output == [HDMI-1]).
1718                  */
1719                 i3_output *output;
1720                 SLIST_FOREACH(output, outputs, slist) {
1721                     if (strcasecmp(output->name, tray_output) == 0 ||
1722                         (strcasecmp(tray_output, "primary") == 0 && output->primary)) {
1723                         init_tray();
1724                         break;
1725                     }
1726                 }
1727                 tray_configured = true;
1728             }
1729         } else {
1730             /* We already have a bar, so we just reconfigure it */
1731             mask = XCB_CONFIG_WINDOW_X |
1732                    XCB_CONFIG_WINDOW_Y |
1733                    XCB_CONFIG_WINDOW_WIDTH |
1734                    XCB_CONFIG_WINDOW_HEIGHT |
1735                    XCB_CONFIG_WINDOW_STACK_MODE;
1736             values[0] = walk->rect.x;
1737             if (config.position == POS_TOP)
1738                 values[1] = walk->rect.y;
1739             else
1740                 values[1] = walk->rect.y + walk->rect.h - bar_height;
1741             values[2] = walk->rect.w;
1742             values[3] = bar_height;
1743             values[4] = XCB_STACK_MODE_ABOVE;
1744
1745             DLOG("Reconfiguring strut partial property for output %s\n", walk->name);
1746             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1747
1748             DLOG("Destroying buffer for output %s\n", walk->name);
1749             xcb_free_pixmap(xcb_connection, walk->buffer);
1750
1751             DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1752             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1753                                                                         walk->bar,
1754                                                                         mask,
1755                                                                         values);
1756
1757             mask = XCB_CW_OVERRIDE_REDIRECT;
1758             values[0] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1759             DLOG("Changing window attribute override_redirect for output %s to %d\n", walk->name, values[0]);
1760             xcb_void_cookie_t chg_cookie = xcb_change_window_attributes(xcb_connection,
1761                                                                         walk->bar,
1762                                                                         mask,
1763                                                                         values);
1764
1765             DLOG("Recreating buffer for output %s\n", walk->name);
1766             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1767                                                                     root_screen->root_depth,
1768                                                                     walk->buffer,
1769                                                                     walk->bar,
1770                                                                     walk->rect.w,
1771                                                                     bar_height);
1772
1773             xcb_void_cookie_t map_cookie, umap_cookie;
1774             if (redraw_bars) {
1775                 /* Unmap the window, and draw it again when in dock mode */
1776                 umap_cookie = xcb_unmap_window_checked(xcb_connection, walk->bar);
1777                 if (config.hide_on_modifier == M_DOCK) {
1778                     cont_child();
1779                     map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1780                 } else {
1781                     stop_child();
1782                 }
1783
1784                 if (config.hide_on_modifier == M_HIDE) {
1785                     /* Switching to hide mode, register for keyevents */
1786                     register_xkb_keyevents();
1787                 } else {
1788                     /* Switching to dock/invisible mode, deregister from keyevents */
1789                     deregister_xkb_keyevents();
1790                 }
1791             }
1792
1793             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window") ||
1794                 xcb_request_failed(chg_cookie, "Could not change window") ||
1795                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1796                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1797                 (redraw_bars && (xcb_request_failed(umap_cookie, "Could not unmap window") ||
1798                                  (config.hide_on_modifier == M_DOCK && xcb_request_failed(map_cookie, "Could not map window"))))) {
1799                 exit(EXIT_FAILURE);
1800             }
1801         }
1802     }
1803 }
1804
1805 /*
1806  * Render the bars, with buttons and statusline
1807  *
1808  */
1809 void draw_bars(bool unhide) {
1810     DLOG("Drawing bars...\n");
1811     int workspace_width = 0;
1812     /* Is the currently-rendered statusline using short_text items? */
1813     bool rendered_statusline_is_short = false;
1814
1815     refresh_statusline(false);
1816
1817     i3_output *outputs_walk;
1818     SLIST_FOREACH(outputs_walk, outputs, slist) {
1819         if (!outputs_walk->active) {
1820             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1821             continue;
1822         }
1823         if (outputs_walk->bar == XCB_NONE) {
1824             /* Oh shit, an active output without an own bar. Create it now! */
1825             reconfig_windows(false);
1826         }
1827         /* First things first: clear the backbuffer */
1828         uint32_t color = colors.bar_bg;
1829         xcb_change_gc(xcb_connection,
1830                       outputs_walk->bargc,
1831                       XCB_GC_FOREGROUND,
1832                       &color);
1833         xcb_rectangle_t rect = {0, 0, outputs_walk->rect.w, bar_height};
1834         xcb_poly_fill_rectangle(xcb_connection,
1835                                 outputs_walk->buffer,
1836                                 outputs_walk->bargc,
1837                                 1,
1838                                 &rect);
1839
1840         if (!config.disable_ws) {
1841             i3_ws *ws_walk;
1842             TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1843                 DLOG("Drawing button for WS %s at x = %d, len = %d\n",
1844                      i3string_as_utf8(ws_walk->name), workspace_width, ws_walk->name_width);
1845                 uint32_t fg_color = colors.inactive_ws_fg;
1846                 uint32_t bg_color = colors.inactive_ws_bg;
1847                 uint32_t border_color = colors.inactive_ws_border;
1848                 if (ws_walk->visible) {
1849                     if (!ws_walk->focused) {
1850                         fg_color = colors.active_ws_fg;
1851                         bg_color = colors.active_ws_bg;
1852                         border_color = colors.active_ws_border;
1853                     } else {
1854                         fg_color = colors.focus_ws_fg;
1855                         bg_color = colors.focus_ws_bg;
1856                         border_color = colors.focus_ws_border;
1857                     }
1858                 }
1859                 if (ws_walk->urgent) {
1860                     DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
1861                     fg_color = colors.urgent_ws_fg;
1862                     bg_color = colors.urgent_ws_bg;
1863                     border_color = colors.urgent_ws_border;
1864                     unhide = true;
1865                 }
1866                 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1867                 uint32_t vals_border[] = {border_color, border_color};
1868                 xcb_change_gc(xcb_connection,
1869                               outputs_walk->bargc,
1870                               mask,
1871                               vals_border);
1872                 xcb_rectangle_t rect_border = {workspace_width,
1873                                                logical_px(1),
1874                                                ws_walk->name_width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
1875                                                font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1)};
1876                 xcb_poly_fill_rectangle(xcb_connection,
1877                                         outputs_walk->buffer,
1878                                         outputs_walk->bargc,
1879                                         1,
1880                                         &rect_border);
1881                 uint32_t vals[] = {bg_color, bg_color};
1882                 xcb_change_gc(xcb_connection,
1883                               outputs_walk->bargc,
1884                               mask,
1885                               vals);
1886                 xcb_rectangle_t rect = {workspace_width + logical_px(1),
1887                                         2 * logical_px(1),
1888                                         ws_walk->name_width + 2 * logical_px(ws_hoff_px),
1889                                         font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1)};
1890                 xcb_poly_fill_rectangle(xcb_connection,
1891                                         outputs_walk->buffer,
1892                                         outputs_walk->bargc,
1893                                         1,
1894                                         &rect);
1895                 set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1896                 draw_text(ws_walk->name, outputs_walk->buffer, outputs_walk->bargc,
1897                           workspace_width + logical_px(ws_hoff_px) + logical_px(1),
1898                           logical_px(ws_voff_px),
1899                           ws_walk->name_width);
1900
1901                 workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
1902                 if (TAILQ_NEXT(ws_walk, tailq) != NULL)
1903                     workspace_width += logical_px(ws_spacing_px);
1904             }
1905         }
1906
1907         if (binding.name && !config.disable_binding_mode_indicator) {
1908             workspace_width += logical_px(ws_spacing_px);
1909
1910             uint32_t fg_color = colors.binding_mode_fg;
1911             uint32_t bg_color = colors.binding_mode_bg;
1912             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1913
1914             uint32_t vals_border[] = {colors.binding_mode_border, colors.binding_mode_border};
1915             xcb_change_gc(xcb_connection,
1916                           outputs_walk->bargc,
1917                           mask,
1918                           vals_border);
1919             xcb_rectangle_t rect_border = {workspace_width,
1920                                            logical_px(1),
1921                                            binding.width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
1922                                            font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1)};
1923             xcb_poly_fill_rectangle(xcb_connection,
1924                                     outputs_walk->buffer,
1925                                     outputs_walk->bargc,
1926                                     1,
1927                                     &rect_border);
1928
1929             uint32_t vals[] = {bg_color, bg_color};
1930             xcb_change_gc(xcb_connection,
1931                           outputs_walk->bargc,
1932                           mask,
1933                           vals);
1934             xcb_rectangle_t rect = {workspace_width + logical_px(1),
1935                                     2 * logical_px(1),
1936                                     binding.width + 2 * logical_px(ws_hoff_px),
1937                                     font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1)};
1938             xcb_poly_fill_rectangle(xcb_connection,
1939                                     outputs_walk->buffer,
1940                                     outputs_walk->bargc,
1941                                     1,
1942                                     &rect);
1943
1944             set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1945             draw_text(binding.name,
1946                       outputs_walk->buffer,
1947                       outputs_walk->bargc,
1948                       workspace_width + logical_px(ws_hoff_px) + logical_px(1),
1949                       logical_px(ws_voff_px),
1950                       binding.width);
1951
1952             unhide = true;
1953             workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + binding.width;
1954         }
1955
1956         if (!TAILQ_EMPTY(&statusline_head)) {
1957             DLOG("Printing statusline!\n");
1958
1959             int tray_width = get_tray_width(outputs_walk->trayclients);
1960             uint32_t max_statusline_width = outputs_walk->rect.w - workspace_width - tray_width - 2 * logical_px(sb_hoff_px);
1961
1962             /* If the statusline is too long, try to use short texts. */
1963             if (statusline_width > max_statusline_width) {
1964                 /* If the currently rendered statusline is long, render a short status line */
1965                 refresh_statusline(true);
1966                 rendered_statusline_is_short = true;
1967             } else if (rendered_statusline_is_short) {
1968                 /* If the currently rendered statusline is short, render a long status line */
1969                 refresh_statusline(false);
1970                 rendered_statusline_is_short = false;
1971             }
1972
1973             /* Luckily we already prepared a seperate pixmap containing the rendered
1974              * statusline, we just have to copy the relevant parts to the relevant
1975              * position */
1976             int visible_statusline_width = MIN(statusline_width, max_statusline_width);
1977             xcb_copy_area(xcb_connection,
1978                           statusline_pm,
1979                           outputs_walk->buffer,
1980                           outputs_walk->bargc,
1981                           (int16_t)(statusline_width - visible_statusline_width), 0,
1982                           (int16_t)(outputs_walk->rect.w - tray_width - logical_px(sb_hoff_px) - visible_statusline_width), 0,
1983                           (int16_t)visible_statusline_width, (int16_t)bar_height);
1984         }
1985
1986         workspace_width = 0;
1987     }
1988
1989     /* Assure the bar is hidden/unhidden according to the specified hidden_state and mode */
1990     if (mod_pressed ||
1991         config.hidden_state == S_SHOW ||
1992         unhide) {
1993         unhide_bars();
1994     } else if (config.hide_on_modifier == M_HIDE) {
1995         hide_bars();
1996     }
1997
1998     redraw_bars();
1999 }
2000
2001 /*
2002  * Redraw the bars, i.e. simply copy the buffer to the barwindow
2003  *
2004  */
2005 void redraw_bars(void) {
2006     i3_output *outputs_walk;
2007     SLIST_FOREACH(outputs_walk, outputs, slist) {
2008         if (!outputs_walk->active) {
2009             continue;
2010         }
2011         xcb_copy_area(xcb_connection,
2012                       outputs_walk->buffer,
2013                       outputs_walk->bar,
2014                       outputs_walk->bargc,
2015                       0, 0,
2016                       0, 0,
2017                       outputs_walk->rect.w,
2018                       outputs_walk->rect.h);
2019         xcb_flush(xcb_connection);
2020     }
2021 }
2022
2023 /*
2024  * Set the current binding mode
2025  *
2026  */
2027 void set_current_mode(struct mode *current) {
2028     I3STRING_FREE(binding.name);
2029     binding = *current;
2030     activated_mode = binding.name != NULL;
2031     return;
2032 }