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 #include <xcb/xcb_cursor.h>
  15
  16 #include <stdio.h>
  17 #include <stdlib.h>
  18 #include <unistd.h>
  19 #include <fcntl.h>
  20 #include <string.h>
  21 #include <i3/ipc.h>
  22 #include <ev.h>
  23 #include <errno.h>
  24 #include <limits.h>
  25 #include <err.h>
  26
  27 #include <X11/Xlib.h>
  28 #include <X11/XKBlib.h>
  29 #include <X11/extensions/XKB.h>
  30
  31 #ifdef I3_ASAN_ENABLED
  32 #include <sanitizer/lsan_interface.h>
  33 #endif
  34
  35 #include "common.h"
  36 #include "libi3.h"
  37
  38 /** This is the equivalent of XC_left_ptr. I’m not sure why xcb doesn’t have a
  39  * constant for that. */
  40 #define XCB_CURSOR_LEFT_PTR 68
  41
  42 /* We save the atoms in an easy to access array, indexed by an enum */
  43 enum {
  44 #define ATOM_DO(name) name,
  45 #include "xcb_atoms.def"
  46     NUM_ATOMS
  47 };
  48
  49 xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
  50 xcb_atom_t atoms[NUM_ATOMS];
  51
  52 /* Variables, that are the same for all functions at all times */
  53 xcb_connection_t *xcb_connection;
  54 int screen;
  55 xcb_screen_t *root_screen;
  56 xcb_window_t xcb_root;
  57 static xcb_cursor_t cursor;
  58
  59 /* selection window for tray support */
  60 static xcb_window_t selwin = XCB_NONE;
  61 static xcb_intern_atom_reply_t *tray_reply = NULL;
  62
  63 /* This is needed for integration with libi3 */
  64 xcb_connection_t *conn;
  65
  66 /* The font we'll use */
  67 static i3Font font;
  68
  69 /* Icon size (based on font size) */
  70 int icon_size;
  71
  72 xcb_visualtype_t *visual_type;
  73 uint8_t depth;
  74 xcb_colormap_t colormap;
  75
  76 /* Overall height of the bar (based on font size) */
  77 int bar_height;
  78
  79 /* These are only relevant for XKB, which we only need for grabbing modifiers */
  80 int xkb_base;
  81 int mod_pressed = 0;
  82
  83 /* Event watchers, to interact with the user */
  84 ev_prepare *xcb_prep;
  85 ev_check *xcb_chk;
  86 ev_io *xcb_io;
  87 ev_io *xkb_io;
  88
  89 /* The name of current binding mode */
  90 static mode binding;
  91
  92 /* Indicates whether a new binding mode was recently activated */
  93 bool activated_mode = false;
  94
  95 /* The parsed colors */
  96 struct xcb_colors_t {
  97     color_t bar_fg;
  98     color_t bar_bg;
  99     color_t sep_fg;
 100     color_t focus_bar_fg;
 101     color_t focus_bar_bg;
 102     color_t focus_sep_fg;
 103     color_t active_ws_fg;
 104     color_t active_ws_bg;
 105     color_t active_ws_border;
 106     color_t inactive_ws_fg;
 107     color_t inactive_ws_bg;
 108     color_t inactive_ws_border;
 109     color_t urgent_ws_bg;
 110     color_t urgent_ws_fg;
 111     color_t urgent_ws_border;
 112     color_t focus_ws_bg;
 113     color_t focus_ws_fg;
 114     color_t focus_ws_border;
 115     color_t binding_mode_bg;
 116     color_t binding_mode_fg;
 117     color_t binding_mode_border;
 118 };
 119 struct xcb_colors_t colors;
 120
 121 /* Horizontal offset between a workspace label and button borders */
 122 static const int ws_hoff_px = 4;
 123
 124 /* Vertical offset between a workspace label and button borders */
 125 static const int ws_voff_px = 3;
 126
 127 /* Offset between two workspace buttons */
 128 static const int ws_spacing_px = 1;
 129
 130 /* Offset between the statusline and 1) workspace buttons on the left
 131  *                                   2) the tray or screen edge on the right */
 132 static const int sb_hoff_px = 4;
 133
 134 /* Additional offset between the tray and the statusline, if the tray is not empty */
 135 static const int tray_loff_px = 2;
 136
 137 /* Vertical offset between the bar and a separator */
 138 static const int sep_voff_px = 4;
 139
 140 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
 141     xcb_generic_error_t *err;
 142     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
 143         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
 144         return err->error_code;
 145     }
 146     return 0;
 147 }
 148
 149 uint32_t get_sep_offset(struct status_block *block) {
 150     if (!block->no_separator && block->sep_block_width > 0)
 151         return block->sep_block_width / 2 + block->sep_block_width % 2;
 152     return 0;
 153 }
 154
 155 int get_tray_width(struct tc_head *trayclients) {
 156     trayclient *trayclient;
 157     int tray_width = 0;
 158     TAILQ_FOREACH_REVERSE(trayclient, trayclients, tc_head, tailq) {
 159         if (!trayclient->mapped)
 160             continue;
 161         tray_width += icon_size + logical_px(config.tray_padding);
 162     }
 163     if (tray_width > 0)
 164         tray_width += logical_px(tray_loff_px);
 165     return tray_width;
 166 }
 167
 168 /*
 169  * Draws a separator for the given block if necessary.
 170  *
 171  */
 172 static void draw_separator(i3_output *output, uint32_t x, struct status_block *block, bool use_focus_colors) {
 173     color_t sep_fg = (use_focus_colors ? colors.focus_sep_fg : colors.sep_fg);
 174     color_t bar_bg = (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg);
 175
 176     uint32_t sep_offset = get_sep_offset(block);
 177     if (TAILQ_NEXT(block, blocks) == NULL || sep_offset == 0)
 178         return;
 179
 180     uint32_t center_x = x - sep_offset;
 181     if (config.separator_symbol == NULL) {
 182         /* Draw a classic one pixel, vertical separator. */
 183         draw_util_rectangle(xcb_connection, &output->statusline_buffer, sep_fg,
 184                             center_x,
 185                             logical_px(sep_voff_px),
 186                             logical_px(1),
 187                             bar_height - 2 * logical_px(sep_voff_px));
 188     } else {
 189         /* Draw a custom separator. */
 190         uint32_t separator_x = MAX(x - block->sep_block_width, center_x - separator_symbol_width / 2);
 191         draw_util_text(config.separator_symbol, &output->statusline_buffer, sep_fg, bar_bg,
 192                        separator_x, logical_px(ws_voff_px), x - separator_x);
 193     }
 194 }
 195
 196 uint32_t predict_statusline_length(bool use_short_text) {
 197     uint32_t width = 0;
 198     struct status_block *block;
 199
 200     TAILQ_FOREACH(block, &statusline_head, blocks) {
 201         i3String *text = block->full_text;
 202         struct status_block_render_desc *render = &block->full_render;
 203         if (use_short_text && block->short_text != NULL) {
 204             text = block->short_text;
 205             render = &block->short_render;
 206         }
 207
 208         if (i3string_get_num_bytes(text) == 0)
 209             continue;
 210
 211         render->width = predict_text_width(text);
 212         if (block->border)
 213             render->width += logical_px(2);
 214
 215         /* Compute offset and append for text aligment in min_width. */
 216         if (block->min_width <= render->width) {
 217             render->x_offset = 0;
 218             render->x_append = 0;
 219         } else {
 220             uint32_t padding_width = block->min_width - render->width;
 221             switch (block->align) {
 222                 case ALIGN_LEFT:
 223                     render->x_append = padding_width;
 224                     break;
 225                 case ALIGN_RIGHT:
 226                     render->x_offset = padding_width;
 227                     break;
 228                 case ALIGN_CENTER:
 229                     render->x_offset = padding_width / 2;
 230                     render->x_append = padding_width / 2 + padding_width % 2;
 231                     break;
 232             }
 233         }
 234
 235         width += render->width + render->x_offset + render->x_append;
 236
 237         /* If this is not the last block, add some pixels for a separator. */
 238         if (TAILQ_NEXT(block, blocks) != NULL)
 239             width += block->sep_block_width;
 240     }
 241
 242     return width;
 243 }
 244
 245 /*
 246  * Redraws the statusline to the output's statusline_buffer
 247  */
 248 void draw_statusline(i3_output *output, uint32_t clip_left, bool use_focus_colors, bool use_short_text) {
 249     struct status_block *block;
 250
 251     color_t bar_color = (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg);
 252     draw_util_clear_surface(xcb_connection, &output->statusline_buffer, bar_color);
 253
 254     /* Use unsigned integer wraparound to clip off the left side.
 255      * For example, if clip_left is 75, then x will start at the very large
 256      * number INT_MAX-75, which is way outside the surface dimensions. Drawing
 257      * to that x position is a no-op which XCB and Cairo safely ignore. Once x moves
 258      * up by 75 and goes past INT_MAX, it will wrap around again to 0, and we start
 259      * actually rendering content to the surface. */
 260     uint32_t x = 0 - clip_left;
 261
 262     /* Draw the text of each block */
 263     TAILQ_FOREACH(block, &statusline_head, blocks) {
 264         i3String *text = block->full_text;
 265         struct status_block_render_desc *render = &block->full_render;
 266         if (use_short_text && block->short_text != NULL) {
 267             text = block->short_text;
 268             render = &block->short_render;
 269         }
 270
 271         if (i3string_get_num_bytes(text) == 0)
 272             continue;
 273
 274         color_t fg_color;
 275         if (block->urgent) {
 276             fg_color = colors.urgent_ws_fg;
 277         } else if (block->color) {
 278             fg_color = draw_util_hex_to_color(block->color);
 279         } else if (use_focus_colors) {
 280             fg_color = colors.focus_bar_fg;
 281         } else {
 282             fg_color = colors.bar_fg;
 283         }
 284
 285         color_t bg_color = bar_color;
 286
 287         int border_width = (block->border) ? logical_px(1) : 0;
 288         int full_render_width = render->width + render->x_offset + render->x_append;
 289         if (block->border || block->background || block->urgent) {
 290             /* Let's determine the colors first. */
 291             color_t border_color = bar_color;
 292             if (block->urgent) {
 293                 border_color = colors.urgent_ws_border;
 294                 bg_color = colors.urgent_ws_bg;
 295             } else {
 296                 if (block->border)
 297                     border_color = draw_util_hex_to_color(block->border);
 298                 if (block->background)
 299                     bg_color = draw_util_hex_to_color(block->background);
 300             }
 301
 302             /* Draw the border. */
 303             draw_util_rectangle(xcb_connection, &output->statusline_buffer, border_color,
 304                                 x, logical_px(1),
 305                                 full_render_width,
 306                                 bar_height - logical_px(2));
 307
 308             /* Draw the background. */
 309             draw_util_rectangle(xcb_connection, &output->statusline_buffer, bg_color,
 310                                 x + border_width,
 311                                 logical_px(1) + border_width,
 312                                 full_render_width - 2 * border_width,
 313                                 bar_height - 2 * border_width - logical_px(2));
 314         }
 315
 316         draw_util_text(text, &output->statusline_buffer, fg_color, bg_color,
 317                        x + render->x_offset + border_width, logical_px(ws_voff_px),
 318                        render->width - 2 * border_width);
 319         x += full_render_width;
 320
 321         /* If this is not the last block, draw a separator. */
 322         if (TAILQ_NEXT(block, blocks) != NULL) {
 323             x += block->sep_block_width;
 324             draw_separator(output, x, block, use_focus_colors);
 325         }
 326     }
 327 }
 328
 329 /*
 330  * Hides all bars (unmaps them)
 331  *
 332  */
 333 void hide_bars(void) {
 334     if ((config.hide_on_modifier == M_DOCK) || (config.hidden_state == S_SHOW && config.hide_on_modifier == M_HIDE)) {
 335         return;
 336     }
 337
 338     i3_output *walk;
 339     SLIST_FOREACH(walk, outputs, slist) {
 340         if (!walk->active) {
 341             continue;
 342         }
 343         xcb_unmap_window(xcb_connection, walk->bar.id);
 344     }
 345     stop_child();
 346 }
 347
 348 /*
 349  * Unhides all bars (maps them)
 350  *
 351  */
 352 void unhide_bars(void) {
 353     if (config.hide_on_modifier != M_HIDE) {
 354         return;
 355     }
 356
 357     i3_output *walk;
 358     xcb_void_cookie_t cookie;
 359     uint32_t mask;
 360     uint32_t values[5];
 361
 362     cont_child();
 363
 364     SLIST_FOREACH(walk, outputs, slist) {
 365         if (walk->bar.id == XCB_NONE) {
 366             continue;
 367         }
 368         mask = XCB_CONFIG_WINDOW_X |
 369                XCB_CONFIG_WINDOW_Y |
 370                XCB_CONFIG_WINDOW_WIDTH |
 371                XCB_CONFIG_WINDOW_HEIGHT |
 372                XCB_CONFIG_WINDOW_STACK_MODE;
 373         values[0] = walk->rect.x;
 374         if (config.position == POS_TOP)
 375             values[1] = walk->rect.y;
 376         else
 377             values[1] = walk->rect.y + walk->rect.h - bar_height;
 378         values[2] = walk->rect.w;
 379         values[3] = bar_height;
 380         values[4] = XCB_STACK_MODE_ABOVE;
 381         DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 382         cookie = xcb_configure_window_checked(xcb_connection,
 383                                               walk->bar.id,
 384                                               mask,
 385                                               values);
 386
 387         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 388             exit(EXIT_FAILURE);
 389         }
 390         xcb_map_window(xcb_connection, walk->bar.id);
 391     }
 392 }
 393
 394 /*
 395  * Parse the colors into a format that we can use
 396  *
 397  */
 398 void init_colors(const struct xcb_color_strings_t *new_colors) {
 399 #define PARSE_COLOR(name, def)                                                           \
 400     do {                                                                                 \
 401         colors.name = draw_util_hex_to_color(new_colors->name ? new_colors->name : def); \
 402     } while (0)
 403     PARSE_COLOR(bar_fg, "#FFFFFF");
 404     PARSE_COLOR(bar_bg, "#000000");
 405     PARSE_COLOR(sep_fg, "#666666");
 406     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 407     PARSE_COLOR(active_ws_bg, "#333333");
 408     PARSE_COLOR(active_ws_border, "#333333");
 409     PARSE_COLOR(inactive_ws_fg, "#888888");
 410     PARSE_COLOR(inactive_ws_bg, "#222222");
 411     PARSE_COLOR(inactive_ws_border, "#333333");
 412     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 413     PARSE_COLOR(urgent_ws_bg, "#900000");
 414     PARSE_COLOR(urgent_ws_border, "#2f343a");
 415     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 416     PARSE_COLOR(focus_ws_bg, "#285577");
 417     PARSE_COLOR(focus_ws_border, "#4c7899");
 418 #undef PARSE_COLOR
 419
 420 #define PARSE_COLOR_FALLBACK(name, fallback)                                                         \
 421     do {                                                                                             \
 422         colors.name = new_colors->name ? draw_util_hex_to_color(new_colors->name) : colors.fallback; \
 423     } while (0)
 424
 425     /* For the binding mode indicator colors, we don't hardcode a default.
 426      * Instead, we fall back to urgent_ws_* colors. */
 427     PARSE_COLOR_FALLBACK(binding_mode_fg, urgent_ws_fg);
 428     PARSE_COLOR_FALLBACK(binding_mode_bg, urgent_ws_bg);
 429     PARSE_COLOR_FALLBACK(binding_mode_border, urgent_ws_border);
 430
 431     /* Similarly, for unspecified focused bar colors, we fall back to the
 432      * regular bar colors. */
 433     PARSE_COLOR_FALLBACK(focus_bar_fg, bar_fg);
 434     PARSE_COLOR_FALLBACK(focus_bar_bg, bar_bg);
 435     PARSE_COLOR_FALLBACK(focus_sep_fg, sep_fg);
 436 #undef PARSE_COLOR_FALLBACK
 437
 438     init_tray_colors();
 439     xcb_flush(xcb_connection);
 440 }
 441
 442 /*
 443  * Handle a button press event (i.e. a mouse click on one of our bars).
 444  * We determine, whether the click occurred on a workspace button or if the scroll-
 445  * wheel was used and change the workspace appropriately
 446  *
 447  */
 448 void handle_button(xcb_button_press_event_t *event) {
 449     /* Determine, which bar was clicked */
 450     i3_output *walk;
 451     xcb_window_t bar = event->event;
 452     SLIST_FOREACH(walk, outputs, slist) {
 453         if (walk->bar.id == bar) {
 454             break;
 455         }
 456     }
 457
 458     if (walk == NULL) {
 459         DLOG("Unknown bar clicked!\n");
 460         return;
 461     }
 462
 463     int32_t x = event->event_x >= 0 ? event->event_x : 0;
 464
 465     DLOG("Got button %d\n", event->detail);
 466
 467     int workspace_width = 0;
 468     i3_ws *cur_ws = NULL, *clicked_ws = NULL, *ws_walk;
 469
 470     TAILQ_FOREACH(ws_walk, walk->workspaces, tailq) {
 471         int w = 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
 472         if (x >= workspace_width && x <= workspace_width + w)
 473             clicked_ws = ws_walk;
 474         if (ws_walk->visible)
 475             cur_ws = ws_walk;
 476         workspace_width += w;
 477         if (TAILQ_NEXT(ws_walk, tailq) != NULL)
 478             workspace_width += logical_px(ws_spacing_px);
 479     }
 480
 481     if (x > workspace_width && child_want_click_events()) {
 482         /* If the child asked for click events,
 483          * check if a status block has been clicked. */
 484         int tray_width = get_tray_width(walk->trayclients);
 485         int block_x = 0, last_block_x;
 486         int offset = walk->rect.w - walk->statusline_width - tray_width - logical_px(sb_hoff_px);
 487         int32_t statusline_x = x - offset;
 488
 489         if (statusline_x >= 0 && statusline_x < walk->statusline_width) {
 490             struct status_block *block;
 491             int sep_offset_remainder = 0;
 492
 493             TAILQ_FOREACH(block, &statusline_head, blocks) {
 494                 i3String *text = block->full_text;
 495                 struct status_block_render_desc *render = &block->full_render;
 496                 if (walk->statusline_short_text && block->short_text != NULL) {
 497                     text = block->short_text;
 498                     render = &block->short_render;
 499                 }
 500
 501                 if (i3string_get_num_bytes(text) == 0)
 502                     continue;
 503
 504                 last_block_x = block_x;
 505                 block_x += render->width + render->x_offset + render->x_append + get_sep_offset(block) + sep_offset_remainder;
 506
 507                 if (statusline_x <= block_x && statusline_x >= last_block_x) {
 508                     send_block_clicked(event->detail, block->name, block->instance, event->root_x, event->root_y);
 509                     return;
 510                 }
 511
 512                 sep_offset_remainder = block->sep_block_width - get_sep_offset(block);
 513             }
 514         }
 515     }
 516
 517     /* If a custom command was specified for this mouse button, it overrides
 518      * the default behavior. */
 519     binding_t *binding;
 520     TAILQ_FOREACH(binding, &(config.bindings), bindings) {
 521         if (binding->input_code != event->detail)
 522             continue;
 523
 524         i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, binding->command);
 525         return;
 526     }
 527
 528     if (cur_ws == NULL) {
 529         DLOG("No workspace active?\n");
 530         return;
 531     }
 532     switch (event->detail) {
 533         case 4:
 534             /* Mouse wheel up. We select the previous ws, if any.
 535              * If there is no more workspace, don’t even send the workspace
 536              * command, otherwise (with workspace auto_back_and_forth) we’d end
 537              * up on the wrong workspace. */
 538             if (cur_ws == TAILQ_FIRST(walk->workspaces))
 539                 return;
 540
 541             cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 542             break;
 543         case 5:
 544             /* Mouse wheel down. We select the next ws, if any.
 545              * If there is no more workspace, don’t even send the workspace
 546              * command, otherwise (with workspace auto_back_and_forth) we’d end
 547              * up on the wrong workspace. */
 548             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
 549                 return;
 550
 551             cur_ws = TAILQ_NEXT(cur_ws, tailq);
 552             break;
 553         case 1:
 554             cur_ws = clicked_ws;
 555
 556             /* if no workspace was clicked, focus our currently visible
 557              * workspace if it is not already focused */
 558             if (cur_ws == NULL) {
 559                 TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 560                     if (cur_ws->visible && !cur_ws->focused)
 561                         break;
 562                 }
 563             }
 564
 565             /* if there is nothing to focus, we are done */
 566             if (cur_ws == NULL)
 567                 return;
 568
 569             break;
 570         default:
 571             return;
 572     }
 573
 574     /* To properly handle workspace names with double quotes in them, we need
 575      * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
 576      * first count the number of double quotes, then we allocate a large enough
 577      * buffer, then we copy character by character. */
 578     int num_quotes = 0;
 579     size_t namelen = 0;
 580     const char *utf8_name = cur_ws->canonical_name;
 581     for (const char *walk = utf8_name; *walk != '\0'; walk++) {
 582         if (*walk == '"' || *walk == '\\')
 583             num_quotes++;
 584         /* While we’re looping through the name anyway, we can save one
 585          * strlen(). */
 586         namelen++;
 587     }
 588
 589     const size_t len = namelen + strlen("workspace \"\"") + 1;
 590     char *buffer = scalloc(len + num_quotes, 1);
 591     strncpy(buffer, "workspace \"", strlen("workspace \""));
 592     size_t inpos, outpos;
 593     for (inpos = 0, outpos = strlen("workspace \"");
 594          inpos < namelen;
 595          inpos++, outpos++) {
 596         if (utf8_name[inpos] == '"' || utf8_name[inpos] == '\\') {
 597             buffer[outpos] = '\\';
 598             outpos++;
 599         }
 600         buffer[outpos] = utf8_name[inpos];
 601     }
 602     buffer[outpos] = '"';
 603     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 604     free(buffer);
 605 }
 606
 607 /*
 608  * Handle visibility notifications: when none of the bars are visible, e.g.
 609  * if windows are in fullscreen on each output, suspend the child process.
 610  *
 611  */
 612 static void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
 613     bool visible = (event->state != XCB_VISIBILITY_FULLY_OBSCURED);
 614     int num_visible = 0;
 615     i3_output *output;
 616
 617     SLIST_FOREACH(output, outputs, slist) {
 618         if (!output->active) {
 619             continue;
 620         }
 621         if (output->bar.id == event->window) {
 622             if (output->visible == visible) {
 623                 return;
 624             }
 625             output->visible = visible;
 626         }
 627         num_visible += output->visible;
 628     }
 629
 630     if (num_visible == 0) {
 631         stop_child();
 632     } else if (num_visible == visible) {
 633         /* Wake the child only when transitioning from 0 to 1 visible bar.
 634          * We cannot transition from 0 to 2 or more visible bars at once since
 635          * visibility events are delivered to each window separately */
 636         cont_child();
 637     }
 638 }
 639
 640 /*
 641  * Adjusts the size of the tray window and alignment of the tray clients by
 642  * configuring their respective x coordinates. To be called when mapping or
 643  * unmapping a tray client window.
 644  *
 645  */
 646 static void configure_trayclients(void) {
 647     trayclient *trayclient;
 648     i3_output *output;
 649     SLIST_FOREACH(output, outputs, slist) {
 650         if (!output->active)
 651             continue;
 652
 653         int clients = 0;
 654         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 655             if (!trayclient->mapped)
 656                 continue;
 657             clients++;
 658
 659             DLOG("Configuring tray window %08x to x=%d\n",
 660                  trayclient->win, output->rect.w - (clients * (icon_size + logical_px(config.tray_padding))));
 661             uint32_t x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
 662             xcb_configure_window(xcb_connection,
 663                                  trayclient->win,
 664                                  XCB_CONFIG_WINDOW_X,
 665                                  &x);
 666         }
 667     }
 668 }
 669
 670 /*
 671  * Handles ClientMessages (messages sent from another client directly to us).
 672  *
 673  * At the moment, only the tray window will receive client messages. All
 674  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 675  *
 676  */
 677 static void handle_client_message(xcb_client_message_event_t *event) {
 678     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 679         event->format == 32) {
 680         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 681         /* event->data.data32[0] is the timestamp */
 682         uint32_t op = event->data.data32[1];
 683         uint32_t mask;
 684         uint32_t values[2];
 685         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 686             xcb_window_t client = event->data.data32[2];
 687
 688             mask = XCB_CW_EVENT_MASK;
 689
 690             /* Needed to get the most recent value of XEMBED_MAPPED. */
 691             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE;
 692             /* Needed for UnmapNotify events. */
 693             values[0] |= XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 694             /* Needed because some tray applications (e.g., VLC) use
 695              * override_redirect which causes no ConfigureRequest to be sent. */
 696             values[0] |= XCB_EVENT_MASK_RESIZE_REDIRECT;
 697
 698             xcb_change_window_attributes(xcb_connection, client, mask, values);
 699
 700             /* Request the _XEMBED_INFO property. The XEMBED specification
 701              * (which is referred by the tray specification) says this *has* to
 702              * be set, but VLC does not set it… */
 703             bool map_it = true;
 704             int xe_version = 1;
 705             xcb_get_property_cookie_t xembedc;
 706             xcb_generic_error_t *error;
 707             xembedc = xcb_get_property(xcb_connection,
 708                                        0,
 709                                        client,
 710                                        atoms[_XEMBED_INFO],
 711                                        XCB_GET_PROPERTY_TYPE_ANY,
 712                                        0,
 713                                        2 * 32);
 714
 715             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 716                                                                        xembedc,
 717                                                                        &error);
 718             if (error != NULL) {
 719                 ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
 720                      error->error_code);
 721                 free(error);
 722                 return;
 723             }
 724             if (xembedr != NULL && xembedr->length != 0) {
 725                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 726                 uint32_t *xembed = xcb_get_property_value(xembedr);
 727                 DLOG("xembed version = %d\n", xembed[0]);
 728                 DLOG("xembed flags = %d\n", xembed[1]);
 729                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 730                 xe_version = xembed[0];
 731                 if (xe_version > 1)
 732                     xe_version = 1;
 733                 free(xembedr);
 734             } else {
 735                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 736             }
 737
 738             DLOG("X window %08x requested docking\n", client);
 739             i3_output *output = NULL;
 740             i3_output *walk = NULL;
 741             tray_output_t *tray_output = NULL;
 742             /* We need to iterate through the tray_output assignments first in
 743              * order to prioritize them. Otherwise, if this bar manages two
 744              * outputs and both are assigned as tray_output as well, the first
 745              * output in our list would receive the tray rather than the first
 746              * one defined via tray_output. */
 747             TAILQ_FOREACH(tray_output, &(config.tray_outputs), tray_outputs) {
 748                 SLIST_FOREACH(walk, outputs, slist) {
 749                     if (!walk->active)
 750                         continue;
 751
 752                     if (strcasecmp(walk->name, tray_output->output) == 0) {
 753                         DLOG("Found tray_output assignment for output %s.\n", walk->name);
 754                         output = walk;
 755                         break;
 756                     }
 757
 758                     if (walk->primary && strcasecmp("primary", tray_output->output) == 0) {
 759                         DLOG("Found tray_output assignment on primary output %s.\n", walk->name);
 760                         output = walk;
 761                         break;
 762                     }
 763                 }
 764
 765                 /* If we found an output, we're done. */
 766                 if (output != NULL)
 767                     break;
 768             }
 769
 770             /* If no tray_output has been specified, we fall back to the first
 771              * available output. */
 772             if (output == NULL && TAILQ_EMPTY(&(config.tray_outputs))) {
 773                 SLIST_FOREACH(walk, outputs, slist) {
 774                     if (!walk->active)
 775                         continue;
 776                     DLOG("Falling back to output %s because no primary output is configured\n", walk->name);
 777                     output = walk;
 778                     break;
 779                 }
 780             }
 781
 782             if (output == NULL) {
 783                 ELOG("No output found\n");
 784                 return;
 785             }
 786
 787             xcb_void_cookie_t rcookie = xcb_reparent_window(xcb_connection,
 788                                                             client,
 789                                                             output->bar.id,
 790                                                             output->rect.w - icon_size - logical_px(config.tray_padding),
 791                                                             logical_px(config.tray_padding));
 792             if (xcb_request_failed(rcookie, "Could not reparent window. Maybe it is using an incorrect depth/visual?"))
 793                 return;
 794
 795             /* We reconfigure the window to use a reasonable size. The systray
 796              * specification explicitly says:
 797              *   Tray icons may be assigned any size by the system tray, and
 798              *   should do their best to cope with any size effectively
 799              */
 800             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 801             values[0] = icon_size;
 802             values[1] = icon_size;
 803             xcb_configure_window(xcb_connection,
 804                                  client,
 805                                  mask,
 806                                  values);
 807
 808             /* send the XEMBED_EMBEDDED_NOTIFY message */
 809             void *event = scalloc(32, 1);
 810             xcb_client_message_event_t *ev = event;
 811             ev->response_type = XCB_CLIENT_MESSAGE;
 812             ev->window = client;
 813             ev->type = atoms[_XEMBED];
 814             ev->format = 32;
 815             ev->data.data32[0] = XCB_CURRENT_TIME;
 816             ev->data.data32[1] = XEMBED_EMBEDDED_NOTIFY;
 817             ev->data.data32[2] = output->bar.id;
 818             ev->data.data32[3] = xe_version;
 819             xcb_send_event(xcb_connection,
 820                            0,
 821                            client,
 822                            XCB_EVENT_MASK_NO_EVENT,
 823                            (char *)ev);
 824             free(event);
 825
 826             /* Put the client inside the save set. Upon termination (whether
 827              * killed or normal exit does not matter) of i3bar, these clients
 828              * will be correctly reparented to their most closest living
 829              * ancestor. Without this, tray icons might die when i3bar
 830              * exits/crashes. */
 831             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 832
 833             trayclient *tc = smalloc(sizeof(trayclient));
 834             tc->win = client;
 835             tc->xe_version = xe_version;
 836             tc->mapped = false;
 837             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 838
 839             if (map_it) {
 840                 DLOG("Mapping dock client\n");
 841                 xcb_map_window(xcb_connection, client);
 842             } else {
 843                 DLOG("Not mapping dock client yet\n");
 844             }
 845             /* Trigger an update to copy the statusline text to the appropriate
 846              * position */
 847             configure_trayclients();
 848             draw_bars(false);
 849         }
 850     }
 851 }
 852
 853 /*
 854  * Handles DestroyNotify events by removing the tray client from the data
 855  * structure. According to the XEmbed protocol, this is one way for a tray
 856  * client to finish the protocol. After this event is received, there is no
 857  * further interaction with the tray client.
 858  *
 859  * See: http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
 860  *
 861  */
 862 static void handle_destroy_notify(xcb_destroy_notify_event_t *event) {
 863     DLOG("DestroyNotify for window = %08x, event = %08x\n", event->window, event->event);
 864
 865     i3_output *walk;
 866     SLIST_FOREACH(walk, outputs, slist) {
 867         if (!walk->active)
 868             continue;
 869         DLOG("checking output %s\n", walk->name);
 870         trayclient *trayclient;
 871         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 872             if (trayclient->win != event->window)
 873                 continue;
 874
 875             DLOG("Removing tray client with window ID %08x\n", event->window);
 876             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 877
 878             /* Trigger an update, we now have more space for the statusline */
 879             configure_trayclients();
 880             draw_bars(false);
 881             return;
 882         }
 883     }
 884 }
 885
 886 /*
 887  * Handles MapNotify events. These events happen when a tray client shows its
 888  * window. We respond by realigning the tray clients.
 889  *
 890  */
 891 static void handle_map_notify(xcb_map_notify_event_t *event) {
 892     DLOG("MapNotify for window = %08x, event = %08x\n", event->window, event->event);
 893
 894     i3_output *walk;
 895     SLIST_FOREACH(walk, outputs, slist) {
 896         if (!walk->active)
 897             continue;
 898         DLOG("checking output %s\n", walk->name);
 899         trayclient *trayclient;
 900         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 901             if (trayclient->win != event->window)
 902                 continue;
 903
 904             DLOG("Tray client mapped (window ID %08x). Adjusting tray.\n", event->window);
 905             trayclient->mapped = true;
 906
 907             /* Trigger an update, we now have more space for the statusline */
 908             configure_trayclients();
 909             draw_bars(false);
 910             return;
 911         }
 912     }
 913 }
 914 /*
 915  * Handles UnmapNotify events. These events happen when a tray client hides its
 916  * window. We respond by realigning the tray clients.
 917  *
 918  */
 919 static void handle_unmap_notify(xcb_unmap_notify_event_t *event) {
 920     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 921
 922     i3_output *walk;
 923     SLIST_FOREACH(walk, outputs, slist) {
 924         if (!walk->active)
 925             continue;
 926         DLOG("checking output %s\n", walk->name);
 927         trayclient *trayclient;
 928         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 929             if (trayclient->win != event->window)
 930                 continue;
 931
 932             DLOG("Tray client unmapped (window ID %08x). Adjusting tray.\n", event->window);
 933             trayclient->mapped = false;
 934
 935             /* Trigger an update, we now have more space for the statusline */
 936             configure_trayclients();
 937             draw_bars(false);
 938             return;
 939         }
 940     }
 941 }
 942
 943 /*
 944  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 945  * handled, which tells us whether a dock client should be mapped or unmapped.
 946  *
 947  */
 948 static void handle_property_notify(xcb_property_notify_event_t *event) {
 949     DLOG("PropertyNotify\n");
 950     if (event->atom == atoms[_XEMBED_INFO] &&
 951         event->state == XCB_PROPERTY_NEW_VALUE) {
 952         DLOG("xembed_info updated\n");
 953         trayclient *trayclient = NULL, *walk;
 954         i3_output *o_walk;
 955         SLIST_FOREACH(o_walk, outputs, slist) {
 956             if (!o_walk->active)
 957                 continue;
 958
 959             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 960                 if (walk->win != event->window)
 961                     continue;
 962                 trayclient = walk;
 963                 break;
 964             }
 965
 966             if (trayclient)
 967                 break;
 968         }
 969         if (!trayclient) {
 970             ELOG("PropertyNotify received for unknown window %08x\n",
 971                  event->window);
 972             return;
 973         }
 974         xcb_get_property_cookie_t xembedc;
 975         xembedc = xcb_get_property_unchecked(xcb_connection,
 976                                              0,
 977                                              trayclient->win,
 978                                              atoms[_XEMBED_INFO],
 979                                              XCB_GET_PROPERTY_TYPE_ANY,
 980                                              0,
 981                                              2 * 32);
 982
 983         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 984                                                                    xembedc,
 985                                                                    NULL);
 986         if (xembedr == NULL || xembedr->length == 0) {
 987             DLOG("xembed_info unset\n");
 988             return;
 989         }
 990
 991         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 992         uint32_t *xembed = xcb_get_property_value(xembedr);
 993         DLOG("xembed version = %d\n", xembed[0]);
 994         DLOG("xembed flags = %d\n", xembed[1]);
 995         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 996         DLOG("map state now %d\n", map_it);
 997         if (trayclient->mapped && !map_it) {
 998             /* need to unmap the window */
 999             xcb_unmap_window(xcb_connection, trayclient->win);
1000         } else if (!trayclient->mapped && map_it) {
1001             /* need to map the window */
1002             xcb_map_window(xcb_connection, trayclient->win);
1003         }
1004         free(xembedr);
1005     }
1006 }
1007
1008 /*
1009  * If a tray client attempts to change its size we deny the request and respond
1010  * by telling it its actual size.
1011  *
1012  */
1013 static void handle_configuration_change(xcb_window_t window) {
1014     trayclient *trayclient;
1015     i3_output *output;
1016     SLIST_FOREACH(output, outputs, slist) {
1017         if (!output->active)
1018             continue;
1019
1020         int clients = 0;
1021         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
1022             if (!trayclient->mapped)
1023                 continue;
1024             clients++;
1025
1026             if (trayclient->win != window)
1027                 continue;
1028
1029             xcb_rectangle_t rect;
1030             rect.x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
1031             rect.y = logical_px(config.tray_padding);
1032             rect.width = icon_size;
1033             rect.height = icon_size;
1034
1035             DLOG("This is a tray window. x = %d\n", rect.x);
1036             fake_configure_notify(xcb_connection, rect, window, 0);
1037             return;
1038         }
1039     }
1040
1041     DLOG("WARNING: Could not find corresponding tray window.\n");
1042 }
1043
1044 static void handle_configure_request(xcb_configure_request_event_t *event) {
1045     DLOG("ConfigureRequest for window = %08x\n", event->window);
1046     handle_configuration_change(event->window);
1047 }
1048
1049 static void handle_resize_request(xcb_resize_request_event_t *event) {
1050     DLOG("ResizeRequest for window = %08x\n", event->window);
1051     handle_configuration_change(event->window);
1052 }
1053
1054 /*
1055  * This function is called immediately before the main loop locks. We flush xcb
1056  * then (and only then)
1057  *
1058  */
1059 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
1060     xcb_flush(xcb_connection);
1061 }
1062
1063 /*
1064  * This function is called immediately after the main loop locks, so when one
1065  * of the watchers registered an event.
1066  * We check whether an X-Event arrived and handle it.
1067  *
1068  */
1069 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
1070     xcb_generic_event_t *event;
1071
1072     if (xcb_connection_has_error(xcb_connection)) {
1073         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
1074 #ifdef I3_ASAN_ENABLED
1075         __lsan_do_leak_check();
1076 #endif
1077         exit(1);
1078     }
1079
1080     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
1081         if (event->response_type == 0) {
1082             xcb_generic_error_t *error = (xcb_generic_error_t *)event;
1083             DLOG("Received X11 error, sequence 0x%x, error_code = %d\n", error->sequence, error->error_code);
1084             free(event);
1085             continue;
1086         }
1087
1088         int type = (event->response_type & ~0x80);
1089
1090         if (type == xkb_base && xkb_base > -1) {
1091             DLOG("received an xkb event\n");
1092
1093             xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event;
1094             if (state->xkbType == XCB_XKB_STATE_NOTIFY && config.modifier != XCB_NONE) {
1095                 int modstate = state->mods & config.modifier;
1096
1097 #define DLOGMOD(modmask, status)                        \
1098     do {                                                \
1099         switch (modmask) {                              \
1100             case ShiftMask:                             \
1101                 DLOG("ShiftMask got " #status "!\n");   \
1102                 break;                                  \
1103             case ControlMask:                           \
1104                 DLOG("ControlMask got " #status "!\n"); \
1105                 break;                                  \
1106             case Mod1Mask:                              \
1107                 DLOG("Mod1Mask got " #status "!\n");    \
1108                 break;                                  \
1109             case Mod2Mask:                              \
1110                 DLOG("Mod2Mask got " #status "!\n");    \
1111                 break;                                  \
1112             case Mod3Mask:                              \
1113                 DLOG("Mod3Mask got " #status "!\n");    \
1114                 break;                                  \
1115             case Mod4Mask:                              \
1116                 DLOG("Mod4Mask got " #status "!\n");    \
1117                 break;                                  \
1118             case Mod5Mask:                              \
1119                 DLOG("Mod5Mask got " #status "!\n");    \
1120                 break;                                  \
1121         }                                               \
1122     } while (0)
1123
1124                 if (modstate != mod_pressed) {
1125                     if (modstate == 0) {
1126                         DLOGMOD(config.modifier, released);
1127                         if (!activated_mode)
1128                             hide_bars();
1129                     } else {
1130                         DLOGMOD(config.modifier, pressed);
1131                         activated_mode = false;
1132                         unhide_bars();
1133                     }
1134                     mod_pressed = modstate;
1135                 }
1136 #undef DLOGMOD
1137             }
1138
1139             free(event);
1140             continue;
1141         }
1142
1143         switch (type) {
1144             case XCB_VISIBILITY_NOTIFY:
1145                 /* Visibility change: a bar is [un]obscured by other window */
1146                 handle_visibility_notify((xcb_visibility_notify_event_t *)event);
1147                 break;
1148             case XCB_EXPOSE:
1149                 /* Expose-events happen, when the window needs to be redrawn */
1150                 redraw_bars();
1151                 break;
1152             case XCB_BUTTON_PRESS:
1153                 /* Button press events are mouse buttons clicked on one of our bars */
1154                 handle_button((xcb_button_press_event_t *)event);
1155                 break;
1156             case XCB_CLIENT_MESSAGE:
1157                 /* Client messages are used for client-to-client communication, for
1158                  * example system tray widgets talk to us directly via client messages. */
1159                 handle_client_message((xcb_client_message_event_t *)event);
1160                 break;
1161             case XCB_DESTROY_NOTIFY:
1162                 /* DestroyNotify signifies the end of the XEmbed protocol */
1163                 handle_destroy_notify((xcb_destroy_notify_event_t *)event);
1164                 break;
1165             case XCB_UNMAP_NOTIFY:
1166                 /* UnmapNotify is received when a tray client hides its window. */
1167                 handle_unmap_notify((xcb_unmap_notify_event_t *)event);
1168                 break;
1169             case XCB_MAP_NOTIFY:
1170                 handle_map_notify((xcb_map_notify_event_t *)event);
1171                 break;
1172             case XCB_PROPERTY_NOTIFY:
1173                 /* PropertyNotify */
1174                 handle_property_notify((xcb_property_notify_event_t *)event);
1175                 break;
1176             case XCB_CONFIGURE_REQUEST:
1177                 /* ConfigureRequest, sent by a tray child */
1178                 handle_configure_request((xcb_configure_request_event_t *)event);
1179             case XCB_RESIZE_REQUEST:
1180                 /* ResizeRequest sent by a tray child using override_redirect. */
1181                 handle_resize_request((xcb_resize_request_event_t *)event);
1182                 break;
1183         }
1184         free(event);
1185     }
1186 }
1187
1188 /*
1189  * Dummy callback. We only need this, so that the prepare and check watchers
1190  * are triggered
1191  *
1192  */
1193 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
1194 }
1195
1196 /*
1197  * Early initialization of the connection to X11: Everything which does not
1198  * depend on 'config'.
1199  *
1200  */
1201 char *init_xcb_early() {
1202     /* FIXME: xcb_connect leaks memory */
1203     xcb_connection = xcb_connect(NULL, &screen);
1204     if (xcb_connection_has_error(xcb_connection)) {
1205         ELOG("Cannot open display\n");
1206         exit(EXIT_FAILURE);
1207     }
1208     conn = xcb_connection;
1209     DLOG("Connected to xcb\n");
1210
1211 /* We have to request the atoms we need */
1212 #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
1213 #include "xcb_atoms.def"
1214
1215     root_screen = xcb_aux_get_screen(xcb_connection, screen);
1216     xcb_root = root_screen->root;
1217
1218     depth = root_screen->root_depth;
1219     colormap = root_screen->default_colormap;
1220     visual_type = get_visualtype(root_screen);
1221
1222     xcb_cursor_context_t *cursor_ctx;
1223     if (xcb_cursor_context_new(conn, root_screen, &cursor_ctx) == 0) {
1224         cursor = xcb_cursor_load_cursor(cursor_ctx, "left_ptr");
1225         xcb_cursor_context_free(cursor_ctx);
1226     } else {
1227         cursor = xcb_generate_id(xcb_connection);
1228         i3Font cursor_font = load_font("cursor", false);
1229         xcb_create_glyph_cursor(
1230             xcb_connection,
1231             cursor,
1232             cursor_font.specific.xcb.id,
1233             cursor_font.specific.xcb.id,
1234             XCB_CURSOR_LEFT_PTR,
1235             XCB_CURSOR_LEFT_PTR + 1,
1236             0, 0, 0,
1237             65535, 65535, 65535);
1238     }
1239
1240     /* The various watchers to communicate with xcb */
1241     xcb_io = smalloc(sizeof(ev_io));
1242     xcb_prep = smalloc(sizeof(ev_prepare));
1243     xcb_chk = smalloc(sizeof(ev_check));
1244
1245     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
1246     ev_prepare_init(xcb_prep, &xcb_prep_cb);
1247     ev_check_init(xcb_chk, &xcb_chk_cb);
1248
1249     ev_io_start(main_loop, xcb_io);
1250     ev_prepare_start(main_loop, xcb_prep);
1251     ev_check_start(main_loop, xcb_chk);
1252
1253     /* Now we get the atoms and save them in a nice data structure */
1254     get_atoms();
1255
1256     char *path = root_atom_contents("I3_SOCKET_PATH", xcb_connection, screen);
1257
1258     return path;
1259 }
1260
1261 /*
1262  * Register for xkb keyevents. To grab modifiers without blocking other applications from receiving key events
1263  * involving that modifier, we sadly have to use xkb which is not yet fully supported
1264  * in xcb.
1265  *
1266  */
1267 void register_xkb_keyevents() {
1268     const xcb_query_extension_reply_t *extreply;
1269     extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
1270     if (!extreply->present) {
1271         ELOG("xkb is not present on this server\n");
1272         exit(EXIT_FAILURE);
1273     }
1274     DLOG("initializing xcb-xkb\n");
1275     xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
1276     xcb_xkb_select_events(conn,
1277                           XCB_XKB_ID_USE_CORE_KBD,
1278                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1279                           0,
1280                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1281                           0xff,
1282                           0xff,
1283                           NULL);
1284     xkb_base = extreply->first_event;
1285 }
1286
1287 /*
1288  * Deregister from xkb keyevents.
1289  *
1290  */
1291 void deregister_xkb_keyevents() {
1292     xcb_xkb_select_events(conn,
1293                           XCB_XKB_ID_USE_CORE_KBD,
1294                           0,
1295                           0,
1296                           0,
1297                           0xff,
1298                           0xff,
1299                           NULL);
1300 }
1301
1302 /*
1303  * Initialization which depends on 'config' being usable. Called after the
1304  * configuration has arrived.
1305  *
1306  */
1307 void init_xcb_late(char *fontname) {
1308     if (fontname == NULL)
1309         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
1310
1311     /* Load the font */
1312     font = load_font(fontname, true);
1313     set_font(&font);
1314     DLOG("Calculated font height: %d\n", font.height);
1315     bar_height = font.height + 2 * logical_px(ws_voff_px);
1316     icon_size = bar_height - 2 * logical_px(config.tray_padding);
1317
1318     if (config.separator_symbol)
1319         separator_symbol_width = predict_text_width(config.separator_symbol);
1320
1321     xcb_flush(xcb_connection);
1322
1323     if (config.hide_on_modifier == M_HIDE)
1324         register_xkb_keyevents();
1325 }
1326
1327 /*
1328  * Inform clients waiting for a new _NET_SYSTEM_TRAY that we took the
1329  * selection.
1330  *
1331  */
1332 static void send_tray_clientmessage(void) {
1333     uint8_t buffer[32] = {0};
1334     xcb_client_message_event_t *ev = (xcb_client_message_event_t *)buffer;
1335
1336     ev->response_type = XCB_CLIENT_MESSAGE;
1337     ev->window = xcb_root;
1338     ev->type = atoms[MANAGER];
1339     ev->format = 32;
1340     ev->data.data32[0] = XCB_CURRENT_TIME;
1341     ev->data.data32[1] = tray_reply->atom;
1342     ev->data.data32[2] = selwin;
1343
1344     xcb_send_event(xcb_connection,
1345                    0,
1346                    xcb_root,
1347                    0xFFFFFF,
1348                    (char *)buffer);
1349 }
1350
1351 /*
1352  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
1353  * for the X11 display we are running on, then acquiring the selection for this
1354  * atom. Afterwards, tray clients will send ClientMessages to our window.
1355  *
1356  */
1357 void init_tray(void) {
1358     DLOG("Initializing system tray functionality\n");
1359     /* request the tray manager atom for the X11 display we are running on */
1360     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
1361     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
1362     xcb_intern_atom_cookie_t tray_cookie;
1363     if (tray_reply == NULL)
1364         tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
1365
1366     /* tray support: we need a window to own the selection */
1367     selwin = xcb_generate_id(xcb_connection);
1368     uint32_t selmask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_COLORMAP;
1369     uint32_t selval[] = {root_screen->black_pixel, root_screen->black_pixel, 1, colormap};
1370     xcb_create_window(xcb_connection,
1371                       depth,
1372                       selwin,
1373                       xcb_root,
1374                       -1, -1,
1375                       1, 1,
1376                       0,
1377                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
1378                       visual_type->visual_id,
1379                       selmask,
1380                       selval);
1381
1382     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
1383     /* set the atoms */
1384     xcb_change_property(xcb_connection,
1385                         XCB_PROP_MODE_REPLACE,
1386                         selwin,
1387                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1388                         XCB_ATOM_CARDINAL,
1389                         32,
1390                         1,
1391                         &orientation);
1392     xcb_change_property(xcb_connection,
1393                         XCB_PROP_MODE_REPLACE,
1394                         selwin,
1395                         atoms[_NET_SYSTEM_TRAY_VISUAL],
1396                         XCB_ATOM_VISUALID,
1397                         32,
1398                         1,
1399                         &visual_type->visual_id);
1400
1401     init_tray_colors();
1402
1403     if (tray_reply == NULL) {
1404         if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1405             ELOG("Could not get atom %s\n", atomname);
1406             exit(EXIT_FAILURE);
1407         }
1408     }
1409
1410     xcb_set_selection_owner(xcb_connection,
1411                             selwin,
1412                             tray_reply->atom,
1413                             XCB_CURRENT_TIME);
1414
1415     /* Verify that we have the selection */
1416     xcb_get_selection_owner_cookie_t selcookie;
1417     xcb_get_selection_owner_reply_t *selreply;
1418
1419     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1420     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1421         ELOG("Could not get selection owner for %s\n", atomname);
1422         exit(EXIT_FAILURE);
1423     }
1424
1425     if (selreply->owner != selwin) {
1426         ELOG("Could not set the %s selection. "
1427              "Maybe another tray is already running?\n",
1428              atomname);
1429         /* NOTE that this error is not fatal. We just can’t provide tray
1430          * functionality */
1431         free(selreply);
1432         return;
1433     }
1434
1435     free(selreply);
1436
1437     send_tray_clientmessage();
1438 }
1439
1440 /*
1441  * We need to set the _NET_SYSTEM_TRAY_COLORS atom on the tray selection window
1442  * to make GTK+ 3 applets with symbolic icons visible. If the colors are unset,
1443  * they assume a light background.
1444  * See also https://bugzilla.gnome.org/show_bug.cgi?id=679591
1445  *
1446  */
1447 void init_tray_colors(void) {
1448     /* Convert colors.bar_fg (#rrggbb) to 16-bit RGB */
1449     const char *bar_fg = (config.colors.bar_fg ? config.colors.bar_fg : "#FFFFFF");
1450
1451     DLOG("Setting bar_fg = %s as _NET_SYSTEM_TRAY_COLORS\n", bar_fg);
1452
1453     char strgroups[3][3] = {{bar_fg[1], bar_fg[2], '\0'},
1454                             {bar_fg[3], bar_fg[4], '\0'},
1455                             {bar_fg[5], bar_fg[6], '\0'}};
1456     const uint8_t r = strtol(strgroups[0], NULL, 16);
1457     const uint8_t g = strtol(strgroups[1], NULL, 16);
1458     const uint8_t b = strtol(strgroups[2], NULL, 16);
1459
1460     const uint16_t r16 = ((uint16_t)r << 8) | r;
1461     const uint16_t g16 = ((uint16_t)g << 8) | g;
1462     const uint16_t b16 = ((uint16_t)b << 8) | b;
1463
1464     const uint32_t tray_colors[12] = {
1465         r16, g16, b16, /* foreground color */
1466         r16, g16, b16, /* error color */
1467         r16, g16, b16, /* warning color */
1468         r16, g16, b16, /* success color */
1469     };
1470
1471     xcb_change_property(xcb_connection,
1472                         XCB_PROP_MODE_REPLACE,
1473                         selwin,
1474                         atoms[_NET_SYSTEM_TRAY_COLORS],
1475                         XCB_ATOM_CARDINAL,
1476                         32,
1477                         12,
1478                         tray_colors);
1479 }
1480
1481 /*
1482  * Cleanup the xcb stuff.
1483  * Called once, before the program terminates.
1484  *
1485  */
1486 void clean_xcb(void) {
1487     i3_output *o_walk;
1488     free_workspaces();
1489     SLIST_FOREACH(o_walk, outputs, slist) {
1490         destroy_window(o_walk);
1491         FREE(o_walk->trayclients);
1492         FREE(o_walk->workspaces);
1493         FREE(o_walk->name);
1494     }
1495     FREE_SLIST(outputs, i3_output);
1496     FREE(outputs);
1497
1498     free_font();
1499
1500     xcb_free_cursor(xcb_connection, cursor);
1501     xcb_flush(xcb_connection);
1502     xcb_aux_sync(xcb_connection);
1503     xcb_disconnect(xcb_connection);
1504
1505     ev_check_stop(main_loop, xcb_chk);
1506     ev_prepare_stop(main_loop, xcb_prep);
1507     ev_io_stop(main_loop, xcb_io);
1508
1509     FREE(xcb_chk);
1510     FREE(xcb_prep);
1511     FREE(xcb_io);
1512 }
1513
1514 /*
1515  * Get the earlier requested atoms and save them in the prepared data structure
1516  *
1517  */
1518 void get_atoms(void) {
1519     xcb_intern_atom_reply_t *reply;
1520 #define ATOM_DO(name)                                                        \
1521     reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1522     if (reply == NULL) {                                                     \
1523         ELOG("Could not get atom %s\n", #name);                              \
1524         exit(EXIT_FAILURE);                                                  \
1525     }                                                                        \
1526     atoms[name] = reply->atom;                                               \
1527     free(reply);
1528
1529 #include "xcb_atoms.def"
1530     DLOG("Got atoms\n");
1531 }
1532
1533 /*
1534  * Reparents all tray clients of the specified output to the root window. This
1535  * is either used when shutting down, when an output appears (xrandr --output
1536  * VGA1 --off) or when the primary output changes.
1537  *
1538  * Applications using the tray will start the protocol from the beginning again
1539  * afterwards.
1540  *
1541  */
1542 void kick_tray_clients(i3_output *output) {
1543     if (TAILQ_EMPTY(output->trayclients))
1544         return;
1545
1546     trayclient *trayclient;
1547     while (!TAILQ_EMPTY(output->trayclients)) {
1548         trayclient = TAILQ_FIRST(output->trayclients);
1549         /* Unmap, then reparent (to root) the tray client windows */
1550         xcb_unmap_window(xcb_connection, trayclient->win);
1551         xcb_reparent_window(xcb_connection,
1552                             trayclient->win,
1553                             xcb_root,
1554                             0,
1555                             0);
1556
1557         /* We remove the trayclient right here. We might receive an UnmapNotify
1558          * event afterwards, but better safe than sorry. */
1559         TAILQ_REMOVE(output->trayclients, trayclient, tailq);
1560     }
1561
1562     /* Fake a DestroyNotify so that Qt re-adds tray icons.
1563      * We cannot actually destroy the window because then Qt will not restore
1564      * its event mask on the new window. */
1565     uint8_t buffer[32] = {0};
1566     xcb_destroy_notify_event_t *event = (xcb_destroy_notify_event_t *)buffer;
1567
1568     event->response_type = XCB_DESTROY_NOTIFY;
1569     event->event = selwin;
1570     event->window = selwin;
1571
1572     xcb_send_event(conn, false, selwin, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char *)event);
1573
1574     send_tray_clientmessage();
1575 }
1576
1577 /*
1578  * Destroy the bar of the specified output
1579  *
1580  */
1581 void destroy_window(i3_output *output) {
1582     if (output == NULL) {
1583         return;
1584     }
1585     if (output->bar.id == XCB_NONE) {
1586         return;
1587     }
1588
1589     kick_tray_clients(output);
1590     xcb_destroy_window(xcb_connection, output->bar.id);
1591     output->bar.id = XCB_NONE;
1592 }
1593
1594 /* Strut partial tells i3 where to reserve space for i3bar. This is determined
1595  * by the `position` bar config directive. */
1596 xcb_void_cookie_t config_strut_partial(i3_output *output) {
1597     /* A local struct to save the strut_partial property */
1598     struct {
1599         uint32_t left;
1600         uint32_t right;
1601         uint32_t top;
1602         uint32_t bottom;
1603         uint32_t left_start_y;
1604         uint32_t left_end_y;
1605         uint32_t right_start_y;
1606         uint32_t right_end_y;
1607         uint32_t top_start_x;
1608         uint32_t top_end_x;
1609         uint32_t bottom_start_x;
1610         uint32_t bottom_end_x;
1611     } __attribute__((__packed__)) strut_partial;
1612     memset(&strut_partial, 0, sizeof(strut_partial));
1613
1614     switch (config.position) {
1615         case POS_NONE:
1616             break;
1617         case POS_TOP:
1618             strut_partial.top = bar_height;
1619             strut_partial.top_start_x = output->rect.x;
1620             strut_partial.top_end_x = output->rect.x + output->rect.w;
1621             break;
1622         case POS_BOT:
1623             strut_partial.bottom = bar_height;
1624             strut_partial.bottom_start_x = output->rect.x;
1625             strut_partial.bottom_end_x = output->rect.x + output->rect.w;
1626             break;
1627     }
1628     return xcb_change_property(xcb_connection,
1629                                XCB_PROP_MODE_REPLACE,
1630                                output->bar.id,
1631                                atoms[_NET_WM_STRUT_PARTIAL],
1632                                XCB_ATOM_CARDINAL,
1633                                32,
1634                                12,
1635                                &strut_partial);
1636 }
1637
1638 /*
1639  * Reconfigure all bars and create new bars for recently activated outputs
1640  *
1641  */
1642 void reconfig_windows(bool redraw_bars) {
1643     uint32_t mask;
1644     uint32_t values[6];
1645     static bool tray_configured = false;
1646
1647     i3_output *walk;
1648     SLIST_FOREACH(walk, outputs, slist) {
1649         if (!walk->active) {
1650             /* If an output is not active, we destroy its bar */
1651             /* FIXME: Maybe we rather want to unmap? */
1652             DLOG("Destroying window for output %s\n", walk->name);
1653             destroy_window(walk);
1654             continue;
1655         }
1656         if (walk->bar.id == XCB_NONE) {
1657             DLOG("Creating window for output %s\n", walk->name);
1658
1659             xcb_window_t bar_id = xcb_generate_id(xcb_connection);
1660             xcb_pixmap_t buffer_id = xcb_generate_id(xcb_connection);
1661             xcb_pixmap_t statusline_buffer_id = xcb_generate_id(xcb_connection);
1662             mask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK | XCB_CW_COLORMAP | XCB_CW_CURSOR;
1663
1664             values[0] = colors.bar_bg.colorpixel;
1665             values[1] = root_screen->black_pixel;
1666             /* If hide_on_modifier is set to hide or invisible mode, i3 is not supposed to manage our bar windows */
1667             values[2] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1668             /* We enable the following EventMask fields:
1669              * EXPOSURE, to get expose events (we have to re-draw then)
1670              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1671              *                        child windows use ConfigureWindow
1672              * BUTTON_PRESS, to handle clicks on the workspace buttons
1673              * */
1674             values[3] = XCB_EVENT_MASK_EXPOSURE |
1675                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
1676                         XCB_EVENT_MASK_BUTTON_PRESS;
1677             if (config.hide_on_modifier == M_DOCK) {
1678                 /* If the bar is normally visible, catch visibility change events to suspend
1679                  * the status process when the bar is obscured by full-screened windows.  */
1680                 values[3] |= XCB_EVENT_MASK_VISIBILITY_CHANGE;
1681                 walk->visible = true;
1682             }
1683             values[4] = colormap;
1684             values[5] = cursor;
1685
1686             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1687                                                                      depth,
1688                                                                      bar_id,
1689                                                                      xcb_root,
1690                                                                      walk->rect.x, walk->rect.y + walk->rect.h - bar_height,
1691                                                                      walk->rect.w, bar_height,
1692                                                                      0,
1693                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1694                                                                      visual_type->visual_id,
1695                                                                      mask,
1696                                                                      values);
1697
1698             /* The double-buffer we use to render stuff off-screen */
1699             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1700                                                                     depth,
1701                                                                     buffer_id,
1702                                                                     bar_id,
1703                                                                     walk->rect.w,
1704                                                                     bar_height);
1705
1706             /* The double-buffer we use to render the statusline before copying to buffer */
1707             xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
1708                                                                       depth,
1709                                                                       statusline_buffer_id,
1710                                                                       bar_id,
1711                                                                       walk->rect.w,
1712                                                                       bar_height);
1713
1714             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1715             xcb_void_cookie_t class_cookie;
1716             class_cookie = xcb_change_property(xcb_connection,
1717                                                XCB_PROP_MODE_REPLACE,
1718                                                bar_id,
1719                                                XCB_ATOM_WM_CLASS,
1720                                                XCB_ATOM_STRING,
1721                                                8,
1722                                                (strlen("i3bar") + 1) * 2,
1723                                                "i3bar\0i3bar\0");
1724
1725             char *name;
1726             sasprintf(&name, "i3bar for output %s", walk->name);
1727             xcb_void_cookie_t name_cookie;
1728             name_cookie = xcb_change_property(xcb_connection,
1729                                               XCB_PROP_MODE_REPLACE,
1730                                               bar_id,
1731                                               XCB_ATOM_WM_NAME,
1732                                               XCB_ATOM_STRING,
1733                                               8,
1734                                               strlen(name),
1735                                               name);
1736             free(name);
1737
1738             /* We want dock windows (for now). When override_redirect is set, i3 is ignoring
1739              * this one */
1740             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1741                                                                 XCB_PROP_MODE_REPLACE,
1742                                                                 bar_id,
1743                                                                 atoms[_NET_WM_WINDOW_TYPE],
1744                                                                 XCB_ATOM_ATOM,
1745                                                                 32,
1746                                                                 1,
1747                                                                 (unsigned char *)&atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1748
1749             draw_util_surface_init(xcb_connection, &walk->bar, bar_id, NULL, walk->rect.w, bar_height);
1750             draw_util_surface_init(xcb_connection, &walk->buffer, buffer_id, NULL, walk->rect.w, bar_height);
1751             draw_util_surface_init(xcb_connection, &walk->statusline_buffer, statusline_buffer_id, NULL, walk->rect.w, bar_height);
1752
1753             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1754
1755             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1756             xcb_void_cookie_t map_cookie;
1757             if (config.hide_on_modifier == M_DOCK) {
1758                 map_cookie = xcb_map_window_checked(xcb_connection, bar_id);
1759             }
1760
1761             if (xcb_request_failed(win_cookie, "Could not create window") ||
1762                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1763                 xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
1764                 xcb_request_failed(dock_cookie, "Could not set dock mode") ||
1765                 xcb_request_failed(class_cookie, "Could not set WM_CLASS") ||
1766                 xcb_request_failed(name_cookie, "Could not set WM_NAME") ||
1767                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1768                 ((config.hide_on_modifier == M_DOCK) && xcb_request_failed(map_cookie, "Could not map window"))) {
1769                 exit(EXIT_FAILURE);
1770             }
1771
1772             /* Unless "tray_output none" was specified, we need to initialize the tray. */
1773             bool no_tray = false;
1774             if (!(TAILQ_EMPTY(&(config.tray_outputs)))) {
1775                 no_tray = strcasecmp(TAILQ_FIRST(&(config.tray_outputs))->output, "none") == 0;
1776             }
1777
1778             /*
1779              * There are three scenarios in which we need to initialize the tray:
1780              *   1. A specific output was listed in tray_outputs which is also
1781              *      in the list of outputs managed by this bar.
1782              *   2. No tray_output directive was specified. In this case, we
1783              *      use the first available output.
1784              *   3. 'tray_output primary' was specified. In this case we use the
1785              *      primary output.
1786              *
1787              * Three scenarios in which we specifically don't want to
1788              * initialize the tray are:
1789              *   1. 'tray_output none' was specified.
1790              *   2. A specific output was listed as a tray_output, but is not
1791              *      one of the outputs managed by this bar. For example, consider
1792              *      tray_outputs == [VGA-1], but outputs == [HDMI-1].
1793              *   3. 'tray_output primary' was specified and no output in the list
1794              *      is primary.
1795              */
1796             if (!tray_configured && !no_tray) {
1797                 /* If no tray_output was specified, we go ahead and initialize the tray as
1798                  * we will be using the first available output. */
1799                 if (TAILQ_EMPTY(&(config.tray_outputs))) {
1800                     init_tray();
1801                 }
1802
1803                 /* If one or more tray_output assignments were specified, we ensure that at least one of
1804                  * them is actually an output managed by this instance. */
1805                 tray_output_t *tray_output;
1806                 TAILQ_FOREACH(tray_output, &(config.tray_outputs), tray_outputs) {
1807                     i3_output *output;
1808                     bool found = false;
1809                     SLIST_FOREACH(output, outputs, slist) {
1810                         if (strcasecmp(output->name, tray_output->output) == 0 ||
1811                             (strcasecmp(tray_output->output, "primary") == 0 && output->primary)) {
1812                             found = true;
1813                             init_tray();
1814                             break;
1815                         }
1816                     }
1817
1818                     if (found)
1819                         break;
1820                 }
1821
1822                 tray_configured = true;
1823             }
1824         } else {
1825             /* We already have a bar, so we just reconfigure it */
1826             mask = XCB_CONFIG_WINDOW_X |
1827                    XCB_CONFIG_WINDOW_Y |
1828                    XCB_CONFIG_WINDOW_WIDTH |
1829                    XCB_CONFIG_WINDOW_HEIGHT |
1830                    XCB_CONFIG_WINDOW_STACK_MODE;
1831             values[0] = walk->rect.x;
1832             if (config.position == POS_TOP)
1833                 values[1] = walk->rect.y;
1834             else
1835                 values[1] = walk->rect.y + walk->rect.h - bar_height;
1836             values[2] = walk->rect.w;
1837             values[3] = bar_height;
1838             values[4] = XCB_STACK_MODE_ABOVE;
1839
1840             DLOG("Reconfiguring strut partial property for output %s\n", walk->name);
1841             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1842
1843             DLOG("Destroying buffer for output %s\n", walk->name);
1844             xcb_free_pixmap(xcb_connection, walk->buffer.id);
1845
1846             DLOG("Destroying statusline buffer for output %s\n", walk->name);
1847             xcb_free_pixmap(xcb_connection, walk->statusline_buffer.id);
1848
1849             DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1850             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1851                                                                         walk->bar.id,
1852                                                                         mask,
1853                                                                         values);
1854
1855             mask = XCB_CW_OVERRIDE_REDIRECT;
1856             values[0] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1857             DLOG("Changing window attribute override_redirect for output %s to %d\n", walk->name, values[0]);
1858             xcb_void_cookie_t chg_cookie = xcb_change_window_attributes(xcb_connection,
1859                                                                         walk->bar.id,
1860                                                                         mask,
1861                                                                         values);
1862
1863             DLOG("Recreating buffer for output %s\n", walk->name);
1864             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1865                                                                     depth,
1866                                                                     walk->buffer.id,
1867                                                                     walk->bar.id,
1868                                                                     walk->rect.w,
1869                                                                     bar_height);
1870
1871             DLOG("Recreating statusline buffer for output %s\n", walk->name);
1872             xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
1873                                                                       depth,
1874                                                                       walk->statusline_buffer.id,
1875                                                                       walk->bar.id,
1876                                                                       walk->rect.w,
1877                                                                       bar_height);
1878
1879             draw_util_surface_free(xcb_connection, &(walk->bar));
1880             draw_util_surface_free(xcb_connection, &(walk->buffer));
1881             draw_util_surface_free(xcb_connection, &(walk->statusline_buffer));
1882             draw_util_surface_init(xcb_connection, &(walk->bar), walk->bar.id, NULL, walk->rect.w, bar_height);
1883             draw_util_surface_init(xcb_connection, &(walk->buffer), walk->buffer.id, NULL, walk->rect.w, bar_height);
1884             draw_util_surface_init(xcb_connection, &(walk->statusline_buffer), walk->statusline_buffer.id, NULL, walk->rect.w, bar_height);
1885
1886             xcb_void_cookie_t map_cookie, umap_cookie;
1887             if (redraw_bars) {
1888                 /* Unmap the window, and draw it again when in dock mode */
1889                 umap_cookie = xcb_unmap_window_checked(xcb_connection, walk->bar.id);
1890                 if (config.hide_on_modifier == M_DOCK) {
1891                     cont_child();
1892                     map_cookie = xcb_map_window_checked(xcb_connection, walk->bar.id);
1893                 } else {
1894                     stop_child();
1895                 }
1896
1897                 if (config.hide_on_modifier == M_HIDE) {
1898                     /* Switching to hide mode, register for keyevents */
1899                     register_xkb_keyevents();
1900                 } else {
1901                     /* Switching to dock/invisible mode, deregister from keyevents */
1902                     deregister_xkb_keyevents();
1903                 }
1904             }
1905
1906             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window") ||
1907                 xcb_request_failed(chg_cookie, "Could not change window") ||
1908                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1909                 xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
1910                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1911                 (redraw_bars && (xcb_request_failed(umap_cookie, "Could not unmap window") ||
1912                                  (config.hide_on_modifier == M_DOCK && xcb_request_failed(map_cookie, "Could not map window"))))) {
1913                 exit(EXIT_FAILURE);
1914             }
1915         }
1916     }
1917 }
1918
1919 /*
1920  * Render the bars, with buttons and statusline
1921  *
1922  */
1923 void draw_bars(bool unhide) {
1924     DLOG("Drawing bars...\n");
1925
1926     uint32_t full_statusline_width = predict_statusline_length(false);
1927     uint32_t short_statusline_width = predict_statusline_length(true);
1928
1929     i3_output *outputs_walk;
1930     SLIST_FOREACH(outputs_walk, outputs, slist) {
1931         int workspace_width = 0;
1932
1933         if (!outputs_walk->active) {
1934             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1935             continue;
1936         }
1937         if (outputs_walk->bar.id == XCB_NONE) {
1938             /* Oh shit, an active output without an own bar. Create it now! */
1939             reconfig_windows(false);
1940         }
1941
1942         bool use_focus_colors = output_has_focus(outputs_walk);
1943
1944         /* First things first: clear the backbuffer */
1945         draw_util_clear_surface(xcb_connection, &(outputs_walk->buffer),
1946                                 (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg));
1947
1948         if (!config.disable_ws) {
1949             i3_ws *ws_walk;
1950             TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1951                 DLOG("Drawing button for WS %s at x = %d, len = %d\n",
1952                      i3string_as_utf8(ws_walk->name), workspace_width, ws_walk->name_width);
1953                 color_t fg_color = colors.inactive_ws_fg;
1954                 color_t bg_color = colors.inactive_ws_bg;
1955                 color_t border_color = colors.inactive_ws_border;
1956                 if (ws_walk->visible) {
1957                     if (!ws_walk->focused) {
1958                         fg_color = colors.active_ws_fg;
1959                         bg_color = colors.active_ws_bg;
1960                         border_color = colors.active_ws_border;
1961                     } else {
1962                         fg_color = colors.focus_ws_fg;
1963                         bg_color = colors.focus_ws_bg;
1964                         border_color = colors.focus_ws_border;
1965                     }
1966                 }
1967                 if (ws_walk->urgent) {
1968                     DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
1969                     fg_color = colors.urgent_ws_fg;
1970                     bg_color = colors.urgent_ws_bg;
1971                     border_color = colors.urgent_ws_border;
1972                     unhide = true;
1973                 }
1974
1975                 /* Draw the border of the button. */
1976                 draw_util_rectangle(xcb_connection, &(outputs_walk->buffer), border_color,
1977                                     workspace_width,
1978                                     logical_px(1),
1979                                     ws_walk->name_width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
1980                                     font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1));
1981
1982                 /* Draw the inside of the button. */
1983                 draw_util_rectangle(xcb_connection, &(outputs_walk->buffer), bg_color,
1984                                     workspace_width + logical_px(1),
1985                                     2 * logical_px(1),
1986                                     ws_walk->name_width + 2 * logical_px(ws_hoff_px),
1987                                     font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1));
1988
1989                 draw_util_text(ws_walk->name, &(outputs_walk->buffer), fg_color, bg_color,
1990                                workspace_width + logical_px(ws_hoff_px) + logical_px(1),
1991                                logical_px(ws_voff_px),
1992                                ws_walk->name_width);
1993
1994                 workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
1995                 if (TAILQ_NEXT(ws_walk, tailq) != NULL)
1996                     workspace_width += logical_px(ws_spacing_px);
1997             }
1998         }
1999
2000         if (binding.name && !config.disable_binding_mode_indicator) {
2001             workspace_width += logical_px(ws_spacing_px);
2002
2003             color_t fg_color = colors.binding_mode_fg;
2004             color_t bg_color = colors.binding_mode_bg;
2005
2006             draw_util_rectangle(xcb_connection, &(outputs_walk->buffer), colors.binding_mode_border,
2007                                 workspace_width,
2008                                 logical_px(1),
2009                                 binding.width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
2010                                 font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1));
2011
2012             draw_util_rectangle(xcb_connection, &(outputs_walk->buffer), bg_color,
2013                                 workspace_width + logical_px(1),
2014                                 2 * logical_px(1),
2015                                 binding.width + 2 * logical_px(ws_hoff_px),
2016                                 font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1));
2017
2018             draw_util_text(binding.name, &(outputs_walk->buffer), fg_color, bg_color,
2019                            workspace_width + logical_px(ws_hoff_px) + logical_px(1),
2020                            logical_px(ws_voff_px),
2021                            binding.width);
2022
2023             unhide = true;
2024             workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + binding.width;
2025         }
2026
2027         if (!TAILQ_EMPTY(&statusline_head)) {
2028             DLOG("Printing statusline!\n");
2029
2030             int tray_width = get_tray_width(outputs_walk->trayclients);
2031             uint32_t max_statusline_width = outputs_walk->rect.w - workspace_width - tray_width - 2 * logical_px(sb_hoff_px);
2032             uint32_t clip_left = 0;
2033             uint32_t statusline_width = full_statusline_width;
2034             bool use_short_text = false;
2035
2036             if (statusline_width > max_statusline_width) {
2037                 statusline_width = short_statusline_width;
2038                 use_short_text = true;
2039                 if (statusline_width > max_statusline_width) {
2040                     clip_left = statusline_width - max_statusline_width;
2041                 }
2042             }
2043
2044             int16_t visible_statusline_width = MIN(statusline_width, max_statusline_width);
2045             int x_dest = outputs_walk->rect.w - tray_width - logical_px(sb_hoff_px) - visible_statusline_width;
2046
2047             draw_statusline(outputs_walk, clip_left, use_focus_colors, use_short_text);
2048             draw_util_copy_surface(xcb_connection, &outputs_walk->statusline_buffer, &outputs_walk->buffer, 0, 0,
2049                                    x_dest, 0, visible_statusline_width, (int16_t)bar_height);
2050
2051             outputs_walk->statusline_width = statusline_width;
2052             outputs_walk->statusline_short_text = use_short_text;
2053         }
2054     }
2055
2056     /* Assure the bar is hidden/unhidden according to the specified hidden_state and mode */
2057     if (mod_pressed ||
2058         config.hidden_state == S_SHOW ||
2059         unhide) {
2060         unhide_bars();
2061     } else if (config.hide_on_modifier == M_HIDE) {
2062         hide_bars();
2063     }
2064
2065     redraw_bars();
2066 }
2067
2068 /*
2069  * Redraw the bars, i.e. simply copy the buffer to the barwindow
2070  *
2071  */
2072 void redraw_bars(void) {
2073     i3_output *outputs_walk;
2074     SLIST_FOREACH(outputs_walk, outputs, slist) {
2075         if (!outputs_walk->active) {
2076             continue;
2077         }
2078
2079         draw_util_copy_surface(xcb_connection, &(outputs_walk->buffer), &(outputs_walk->bar), 0, 0,
2080                                0, 0, outputs_walk->rect.w, outputs_walk->rect.h);
2081         xcb_flush(xcb_connection);
2082     }
2083 }
2084
2085 /*
2086  * Set the current binding mode
2087  *
2088  */
2089 void set_current_mode(struct mode *current) {
2090     I3STRING_FREE(binding.name);
2091     binding = *current;
2092     activated_mode = binding.name != NULL;
2093     return;
2094 }