git.sur5r.net Git - i3/i3/blob - src/layout.c

   1 /*
   2  * vim:ts=8:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  *
   6  * © 2009 Michael Stapelberg and contributors
   7  *
   8  * See file LICENSE for license information.
   9  *
  10  * layout.c: Functions handling layout/drawing of window decorations
  11  *
  12  */
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include <stdlib.h>
  16 #include <xcb/xcb.h>
  17 #include <assert.h>
  18 #include <math.h>
  19
  20 #include "config.h"
  21 #include "i3.h"
  22 #include "xcb.h"
  23 #include "table.h"
  24 #include "util.h"
  25 #include "xinerama.h"
  26 #include "layout.h"
  27 #include "client.h"
  28 #include "floating.h"
  29 #include "handlers.h"
  30
  31 /*
  32  * Updates *destination with new_value and returns true if it was changed or false
  33  * if it was the same
  34  *
  35  */
  36 static bool update_if_necessary(uint32_t *destination, const uint32_t new_value) {
  37         uint32_t old_value = *destination;
  38
  39         return ((*destination = new_value) != old_value);
  40 }
  41
  42 /*
  43  * Gets the unoccupied space (= space which is available for windows which were resized by the user)
  44  * for the given row. This is necessary to render both, customly resized windows and never touched
  45  * windows correctly, meaning that the aspect ratio will be maintained when opening new windows.
  46  *
  47  */
  48 int get_unoccupied_x(Workspace *workspace) {
  49         int unoccupied = workspace->rect.width;
  50         float default_factor = ((float)workspace->rect.width / workspace->cols) / workspace->rect.width;
  51
  52         LOG("get_unoccupied_x(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
  53
  54         for (int cols = 0; cols < workspace->cols; cols++) {
  55                 LOG("width_factor[%d] = %f\n", cols, workspace->width_factor[cols]);
  56
  57                 if (workspace->width_factor[cols] == 0)
  58                         unoccupied -= workspace->rect.width * default_factor;
  59         }
  60
  61         LOG("unoccupied space: %d\n", unoccupied);
  62         return unoccupied;
  63 }
  64
  65 /* See get_unoccupied_x() */
  66 int get_unoccupied_y(Workspace *workspace) {
  67         int height = workspace->rect.height;
  68         i3Font *font = load_font(global_conn, config.font);
  69
  70         /* Reserve space for dock clients */
  71         Client *client;
  72         SLIST_FOREACH(client, &(workspace->screen->dock_clients), dock_clients)
  73                 height -= client->desired_height;
  74
  75         /* Space for the internal bar */
  76         height -= (font->height + 6);
  77
  78         int unoccupied = height;
  79         float default_factor = ((float)height / workspace->rows) / height;
  80
  81         LOG("get_unoccupied_y(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
  82
  83         for (int rows = 0; rows < workspace->rows; rows++) {
  84                 LOG("height_factor[%d] = %f\n", rows, workspace->height_factor[rows]);
  85                 if (workspace->height_factor[rows] == 0)
  86                         unoccupied -= height * default_factor;
  87         }
  88
  89         LOG("unoccupied space: %d\n", unoccupied);
  90         return unoccupied;
  91 }
  92
  93 /*
  94  * Redecorates the given client correctly by checking if it’s in a stacking container and
  95  * re-rendering the stack window or just calling decorate_window if it’s not in a stacking
  96  * container.
  97  *
  98  */
  99 void redecorate_window(xcb_connection_t *conn, Client *client) {
 100         if (client->container != NULL &&
 101             (client->container->mode == MODE_STACK ||
 102              client->container->mode == MODE_TABBED)) {
 103                 render_container(conn, client->container);
 104                 /* We clear the frame to generate exposure events, because the color used
 105                    in drawing may be different */
 106                 xcb_clear_area(conn, true, client->frame, 0, 0, client->rect.width, client->rect.height);
 107         } else decorate_window(conn, client, client->frame, client->titlegc, 0, 0);
 108         xcb_flush(conn);
 109 }
 110
 111 /*
 112  * (Re-)draws window decorations for a given Client onto the given drawable/graphic context.
 113  * When in stacking mode, the window decorations are drawn onto an own window.
 114  *
 115  */
 116 void decorate_window(xcb_connection_t *conn, Client *client, xcb_drawable_t drawable,
 117                      xcb_gcontext_t gc, int offset_x, int offset_y) {
 118         i3Font *font = load_font(conn, config.font);
 119         int decoration_height = font->height + 2 + 2;
 120         struct Colortriple *color;
 121         Client *last_focused;
 122
 123         /* Clients without a container (docks) won’t get decorated */
 124         if (client->dock)
 125                 return;
 126
 127         last_focused = SLIST_FIRST(&(client->workspace->focus_stack));
 128         /* Is the window urgent? */
 129         if (client->urgent)
 130                 color = &(config.client.urgent);
 131         else {
 132                 if (client_is_floating(client)) {
 133                         if (last_focused == client)
 134                                 color = &(config.client.focused);
 135                         else color = &(config.client.unfocused);
 136                 } else {
 137                         if (client->container->currently_focused == client) {
 138                                 /* Distinguish if the window is currently focused… */
 139                                 if (last_focused == client && c_ws == client->workspace)
 140                                         color = &(config.client.focused);
 141                                 /* …or if it is the focused window in a not focused container */
 142                                 else color = &(config.client.focused_inactive);
 143                         } else color = &(config.client.unfocused);
 144                 }
 145         }
 146
 147         /* Our plan is the following:
 148            - Draw a rect around the whole client in color->background
 149            - Draw two lines in a lighter color
 150            - Draw the window’s title
 151          */
 152
 153         /* Draw a rectangle in background color around the window */
 154         if (client->borderless && (client->container == NULL ||
 155             (client->container->mode != MODE_STACK &&
 156              client->container->mode != MODE_TABBED)))
 157                 xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 158         else xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, color->background);
 159
 160         /* In stacking mode, we only render the rect for this specific decoration */
 161         if (client->container != NULL && (client->container->mode == MODE_STACK || client->container->mode == MODE_TABBED)) {
 162                 /* We need to use the container’s width because it is the more recent value - when
 163                    in stacking mode, clients get reconfigured only on demand (the not active client
 164                    is not reconfigured), so the client’s rect.width would be wrong */
 165                 xcb_rectangle_t rect = {offset_x, offset_y,
 166                                         offset_x + client->container->width,
 167                                         offset_y + decoration_height };
 168                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 169         } else {
 170                 xcb_rectangle_t rect = {0, 0, client->rect.width, client->rect.height};
 171                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 172
 173                 /* Draw the inner background to have a black frame around clients (such as mplayer)
 174                    which cannot be resized exactly in our frames and therefore are centered */
 175                 xcb_change_gc_single(conn, client->titlegc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 176                 xcb_rectangle_t crect = {2, decoration_height,
 177                                          client->rect.width - (2 + 2), client->rect.height - 2 - decoration_height};
 178                 xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 179         }
 180
 181         if (client->titlebar_position != TITLEBAR_OFF) {
 182                 /* Draw the lines */
 183                 xcb_draw_line(conn, drawable, gc, color->border, offset_x, offset_y, offset_x + client->rect.width, offset_y);
 184                 if ((client->container == NULL ||
 185                     (client->container->mode != MODE_STACK &&
 186                      client->container->mode != MODE_TABBED) ||
 187                     CIRCLEQ_NEXT_OR_NULL(&(client->container->clients), client, clients) == NULL))
 188                         xcb_draw_line(conn, drawable, gc, color->border,
 189                                       offset_x + 2, /* x */
 190                                       offset_y + font->height + 3, /* y */
 191                                       offset_x + client->rect.width - 3, /* to_x */
 192                                       offset_y + font->height + 3 /* to_y */);
 193         }
 194
 195         /* If the client has a title, we draw it */
 196         if (client->name != NULL) {
 197                 /* Draw the font */
 198                 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
 199                 uint32_t values[] = { color->text, color->background, font->id };
 200                 xcb_change_gc(conn, gc, mask, values);
 201
 202                 /* name_len == -1 means this is a legacy application which does not specify _NET_WM_NAME,
 203                    and we don’t handle the old window name (COMPOUND_TEXT) but only _NET_WM_NAME, which
 204                    is UTF-8 */
 205                 if (client->name_len == -1)
 206                         xcb_image_text_8(conn, strlen(client->name), drawable, gc, offset_x + 3 /* X */,
 207                                          offset_y + font->height /* Y = baseline of font */, client->name);
 208                 else
 209                         xcb_image_text_16(conn, client->name_len, drawable, gc, offset_x + 3 /* X */,
 210                                           offset_y + font->height /* Y = baseline of font */, (xcb_char2b_t*)client->name);
 211         }
 212 }
 213
 214 /*
 215  * Pushes the client’s x and y coordinates to X11
 216  *
 217  */
 218 void reposition_client(xcb_connection_t *conn, Client *client) {
 219         i3Screen *screen;
 220
 221         LOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 222         /* Note: We can use a pointer to client->x like an array of uint32_ts
 223            because it is followed by client->y by definition */
 224         xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
 225
 226         if (!client_is_floating(client))
 227                 return;
 228
 229         /* If the client is floating, we need to check if we moved it to a different workspace */
 230         if (client->workspace->screen == (screen = get_screen_containing(client->rect.x, client->rect.y)))
 231                 return;
 232
 233         if (screen == NULL) {
 234                 LOG("Boundary checking disabled, no screen found for (%d, %d)\n", client->rect.x, client->rect.y);
 235                 return;
 236         }
 237
 238         LOG("Client is on workspace %p with screen %p\n", client->workspace, client->workspace->screen);
 239         LOG("but screen at %d, %d is %p\n", client->rect.x, client->rect.y, screen);
 240         floating_assign_to_workspace(client, &workspaces[screen->current_workspace]);
 241 }
 242
 243 /*
 244  * Pushes the client’s width/height to X11 and resizes the child window. This
 245  * function also updates the client’s position, so if you work on tiling clients
 246  * only, you can use this function instead of separate calls to reposition_client
 247  * and resize_client to reduce flickering.
 248  *
 249  */
 250 void resize_client(xcb_connection_t *conn, Client *client) {
 251         i3Font *font = load_font(conn, config.font);
 252
 253         LOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 254         LOG("resizing client 0x%08x to %d x %d\n", client->frame, client->rect.width, client->rect.height);
 255         xcb_configure_window(conn, client->frame,
 256                         XCB_CONFIG_WINDOW_X |
 257                         XCB_CONFIG_WINDOW_Y |
 258                         XCB_CONFIG_WINDOW_WIDTH |
 259                         XCB_CONFIG_WINDOW_HEIGHT,
 260                         &(client->rect.x));
 261
 262         /* Adjust the position of the child inside its frame.
 263          * The coordinates of the child are relative to its frame, we
 264          * add a border of 2 pixel to each value */
 265         uint32_t mask = XCB_CONFIG_WINDOW_X |
 266                         XCB_CONFIG_WINDOW_Y |
 267                         XCB_CONFIG_WINDOW_WIDTH |
 268                         XCB_CONFIG_WINDOW_HEIGHT;
 269         Rect *rect = &(client->child_rect);
 270         switch ((client->container != NULL ? client->container->mode : MODE_DEFAULT)) {
 271                 case MODE_STACK:
 272                 case MODE_TABBED:
 273                         rect->x = 2;
 274                         rect->y = 0;
 275                         rect->width = client->rect.width - (2 + 2);
 276                         rect->height = client->rect.height - 2;
 277                         break;
 278                 default:
 279                         if (client->titlebar_position == TITLEBAR_OFF && client->borderless) {
 280                                 rect->x = 0;
 281                                 rect->y = 0;
 282                                 rect->width = client->rect.width;
 283                                 rect->height = client->rect.height;
 284                         } else if (client->titlebar_position == TITLEBAR_OFF && !client->borderless) {
 285                                 rect->x = 1;
 286                                 rect->y = 1;
 287                                 rect->width = client->rect.width - 1 - 1;
 288                                 rect->height = client->rect.height - 1 - 1;
 289                         } else {
 290                                 rect->x = 2;
 291                                 rect->y = font->height + 2 + 2;
 292                                 rect->width = client->rect.width - (2 + 2);
 293                                 rect->height = client->rect.height - ((font->height + 2 + 2) + 2);
 294                         }
 295                         break;
 296         }
 297
 298         /* Obey the ratio, if any */
 299         if (client->proportional_height != 0 &&
 300             client->proportional_width != 0) {
 301                 LOG("proportional height = %d, width = %d\n", client->proportional_height, client->proportional_width);
 302                 double new_height = rect->height + 1;
 303                 int new_width = rect->width;
 304
 305                 while (new_height > rect->height) {
 306                         new_height = ((double)client->proportional_height / client->proportional_width) * new_width;
 307
 308                         if (new_height > rect->height)
 309                                 new_width--;
 310                 }
 311                 /* Center the window */
 312                 rect->y += ceil(rect->height / 2) - floor(new_height / 2);
 313                 rect->x += ceil(rect->width / 2) - floor(new_width / 2);
 314
 315                 rect->height = new_height;
 316                 rect->width = new_width;
 317                 LOG("new_height = %f, new_width = %d\n", new_height, new_width);
 318         }
 319
 320         if (client->height_increment > 1) {
 321                 int old_height = rect->height;
 322                 rect->height -= (rect->height - client->base_height) % client->height_increment;
 323                 LOG("Lost %d pixel due to client's height_increment (%d px)\n",
 324                     old_height - rect->height, client->height_increment);
 325         }
 326
 327         if (client->width_increment > 1) {
 328                 int old_width = rect->width;
 329                 rect->width -= (rect->width - client->base_width) % client->width_increment;
 330                 LOG("Lost %d pixel due to client's width_increment (%d px)\n",
 331                     old_width - rect->width, client->width_increment);
 332         }
 333
 334         LOG("child will be at %dx%d with size %dx%d\n", rect->x, rect->y, rect->width, rect->height);
 335
 336         xcb_configure_window(conn, client->child, mask, &(rect->x));
 337
 338         /* After configuring a child window we need to fake a configure_notify_event (see ICCCM 4.2.3).
 339          * This is necessary to inform the client of its position relative to the root window,
 340          * not relative to its frame (as done in the configure_notify_event by the x server). */
 341         fake_absolute_configure_notify(conn, client);
 342
 343         /* Force redrawing after resizing the window because any now lost
 344          * pixels could contain old garbage. */
 345         xcb_expose_event_t generated;
 346         generated.window = client->frame;
 347         generated.count = 0;
 348         handle_expose_event(NULL, conn, &generated);
 349 }
 350
 351 /*
 352  * Renders the given container. Is called by render_layout() or individually (for example
 353  * when focus changes in a stacking container)
 354  *
 355  */
 356 void render_container(xcb_connection_t *conn, Container *container) {
 357         Client *client;
 358         int num_clients = 0, current_client = 0;
 359
 360         CIRCLEQ_FOREACH(client, &(container->clients), clients)
 361                 num_clients++;
 362
 363         if (container->mode == MODE_DEFAULT) {
 364                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 365                         /* If the client is in fullscreen mode, it does not get reconfigured */
 366                         if (container->workspace->fullscreen_client == client) {
 367                                 current_client++;
 368                                 continue;
 369                         }
 370
 371                         /* Check if we changed client->x or client->y by updating it.
 372                          * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 373                         if (client->force_reconfigure |
 374                             update_if_necessary(&(client->rect.x), container->x) |
 375                             update_if_necessary(&(client->rect.y), container->y +
 376                                         (container->height / num_clients) * current_client) |
 377                             update_if_necessary(&(client->rect.width), container->width) |
 378                             update_if_necessary(&(client->rect.height), container->height / num_clients))
 379                                 resize_client(conn, client);
 380
 381                         /* TODO: vertical default layout */
 382
 383                         client->force_reconfigure = false;
 384
 385                         current_client++;
 386                 }
 387         } else {
 388                 i3Font *font = load_font(conn, config.font);
 389                 int decoration_height = (font->height + 2 + 2);
 390                 struct Stack_Window *stack_win = &(container->stack_win);
 391                 /* The size for each tab (width), necessary as a separate variable
 392                  * because num_clients gets fixed to 1 in tabbed mode. */
 393                 int size_each = (num_clients == 0 ? container->width : container->width / num_clients);
 394                 int stack_lines = num_clients;
 395
 396                 /* Check if we need to remap our stack title window, it gets unmapped when the container
 397                    is empty in src/handlers.c:unmap_notify() */
 398                 if (stack_win->rect.height == 0 && num_clients > 0) {
 399                         LOG("remapping stack win\n");
 400                         xcb_map_window(conn, stack_win->window);
 401                 } else LOG("not remapping stackwin, height = %d, num_clients = %d\n",
 402                                 stack_win->rect.height, num_clients);
 403
 404                 if (container->mode == MODE_TABBED) {
 405                         /* By setting num_clients to 1 we force that the stack window will be only one line
 406                          * high. The rest of the code is useful in both cases. */
 407                         LOG("tabbed mode, setting num_clients = 1\n");
 408                         if (stack_lines > 1)
 409                                 stack_lines = 1;
 410                 }
 411
 412                 if (container->stack_limit == STACK_LIMIT_COLS) {
 413                         stack_lines = ceil((float)num_clients / container->stack_limit_value);
 414                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 415                         stack_lines = min(num_clients, container->stack_limit_value);
 416                 }
 417
 418                 /* Check if we need to reconfigure our stack title window */
 419                 if (update_if_necessary(&(stack_win->rect.x), container->x) |
 420                     update_if_necessary(&(stack_win->rect.y), container->y) |
 421                     update_if_necessary(&(stack_win->rect.width), container->width) |
 422                     update_if_necessary(&(stack_win->rect.height), decoration_height * stack_lines)) {
 423
 424                         /* Configuration can happen in two slightly different ways:
 425
 426                            If there is no client in fullscreen mode, 5 parameters are passed
 427                            (x, y, width, height, stack mode is set to above which means top-most position).
 428
 429                            If there is a fullscreen client, the fourth parameter is set to to the
 430                            fullscreen window as sibling and the stack mode is set to below, which means
 431                            that the stack_window will be placed just below the sibling, that is, under
 432                            the fullscreen window.
 433                          */
 434                         uint32_t values[] = { stack_win->rect.x, stack_win->rect.y,
 435                                               stack_win->rect.width, stack_win->rect.height,
 436                                               XCB_STACK_MODE_ABOVE, XCB_STACK_MODE_BELOW };
 437                         uint32_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
 438                                         XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT |
 439                                         XCB_CONFIG_WINDOW_STACK_MODE;
 440
 441                         /* Raise the stack window, but keep it below the first floating client
 442                          * and below the fullscreen client (if any) */
 443                         Client *first_floating = TAILQ_FIRST(&(container->workspace->floating_clients));
 444                         if (first_floating != TAILQ_END(&(container->workspace->floating_clients))) {
 445                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 446                                 values[4] = first_floating->frame;
 447                         } else if (container->workspace->fullscreen_client != NULL) {
 448                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 449                                 values[4] = container->workspace->fullscreen_client->frame;
 450                         }
 451
 452                         xcb_configure_window(conn, stack_win->window, mask, values);
 453                 }
 454
 455                 /* Prepare the pixmap for usage */
 456                 cached_pixmap_prepare(conn, &(stack_win->pixmap));
 457
 458                 int current_row = 0, current_col = 0;
 459                 int wrap = 0;
 460
 461                 if (container->stack_limit == STACK_LIMIT_COLS) {
 462                         /* wrap stores the number of rows after which we will
 463                          * wrap to a new column. */
 464                         wrap = ceil((float)num_clients / container->stack_limit_value);
 465                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 466                         /* When limiting rows, the wrap variable serves a
 467                          * slightly different purpose: it holds the number of
 468                          * pixels which each client will get. This is constant
 469                          * during the following loop, so it saves us some
 470                          * divisions and ceil()ing. */
 471                         wrap = (stack_win->rect.width / ceil((float)num_clients / container->stack_limit_value));
 472                 }
 473
 474                 /* Render the decorations of all clients */
 475                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 476                         /* If the client is in fullscreen mode, it does not get reconfigured */
 477                         if (container->workspace->fullscreen_client == client) {
 478                                 current_client++;
 479                                 continue;
 480                         }
 481
 482                         /* Check if we changed client->x or client->y by updating it.
 483                          * Note the bitwise OR instead of logical OR to force evaluation of all statements */
 484                         if (client->force_reconfigure |
 485                             update_if_necessary(&(client->rect.x), container->x) |
 486                             update_if_necessary(&(client->rect.y), container->y + (decoration_height * stack_lines)) |
 487                             update_if_necessary(&(client->rect.width), container->width) |
 488                             update_if_necessary(&(client->rect.height), container->height - (decoration_height * stack_lines)))
 489                                 resize_client(conn, client);
 490
 491                         client->force_reconfigure = false;
 492
 493                         int offset_x = 0;
 494                         int offset_y = 0;
 495                         if (container->mode == MODE_STACK) {
 496                                 if (container->stack_limit == STACK_LIMIT_COLS) {
 497                                         offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 498                                         offset_y = current_row * decoration_height;
 499                                         current_row++;
 500                                         if ((current_row % wrap) == 0) {
 501                                                 current_col++;
 502                                                 current_row = 0;
 503                                         }
 504                                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 505                                         offset_x = current_col * wrap;
 506                                         offset_y = current_row * decoration_height;
 507                                         current_row++;
 508                                         if ((current_row % container->stack_limit_value) == 0) {
 509                                                 current_col++;
 510                                                 current_row = 0;
 511                                         }
 512                                 } else {
 513                                         offset_y = current_client * decoration_height;
 514                                 }
 515                                 current_client++;
 516                         } else if (container->mode == MODE_TABBED)
 517                                 offset_x = current_client++ * size_each;
 518                         decorate_window(conn, client, stack_win->pixmap.id, stack_win->pixmap.gc,
 519                                         offset_x, offset_y);
 520                 }
 521
 522                 /* Check if we need to fill one column because of an uneven
 523                  * amount of windows */
 524                 if (container->mode == MODE_STACK) {
 525                         if (container->stack_limit == STACK_LIMIT_COLS && (current_col % 2) != 0) {
 526                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 527
 528                                 int offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 529                                 int offset_y = current_row * decoration_height;
 530                                 xcb_rectangle_t rect = {offset_x, offset_y,
 531                                                         offset_x + container->width,
 532                                                         offset_y + decoration_height };
 533                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 534                         } else if (container->stack_limit == STACK_LIMIT_ROWS && (current_row % 2) != 0) {
 535                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 536
 537                                 int offset_x = current_col * wrap;
 538                                 int offset_y = current_row * decoration_height;
 539                                 xcb_rectangle_t rect = {offset_x, offset_y,
 540                                                         offset_x + container->width,
 541                                                         offset_y + decoration_height };
 542                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 543                         }
 544                 }
 545
 546                 xcb_copy_area(conn, stack_win->pixmap.id, stack_win->window, stack_win->pixmap.gc,
 547                               0, 0, 0, 0, stack_win->rect.width, stack_win->rect.height);
 548         }
 549 }
 550
 551 static void render_bars(xcb_connection_t *conn, Workspace *r_ws, int width, int *height) {
 552         Client *client;
 553         SLIST_FOREACH(client, &(r_ws->screen->dock_clients), dock_clients) {
 554                 LOG("client is at %d, should be at %d\n", client->rect.y, *height);
 555                 if (client->force_reconfigure |
 556                     update_if_necessary(&(client->rect.x), r_ws->rect.x) |
 557                     update_if_necessary(&(client->rect.y), *height))
 558                         reposition_client(conn, client);
 559
 560                 if (client->force_reconfigure |
 561                     update_if_necessary(&(client->rect.width), width) |
 562                     update_if_necessary(&(client->rect.height), client->desired_height))
 563                         resize_client(conn, client);
 564
 565                 client->force_reconfigure = false;
 566                 LOG("desired_height = %d\n", client->desired_height);
 567                 *height += client->desired_height;
 568         }
 569 }
 570
 571 static void render_internal_bar(xcb_connection_t *conn, Workspace *r_ws, int width, int height) {
 572         i3Font *font = load_font(conn, config.font);
 573         i3Screen *screen = r_ws->screen;
 574         enum { SET_NORMAL = 0, SET_FOCUSED = 1 };
 575
 576         /* Fill the whole bar in black */
 577         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 578         xcb_rectangle_t rect = {0, 0, width, height};
 579         xcb_poly_fill_rectangle(conn, screen->bar, screen->bargc, 1, &rect);
 580
 581         /* Set font */
 582         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FONT, font->id);
 583
 584         int drawn = 0;
 585         for (int c = 0; c < 10; c++) {
 586                 if (workspaces[c].screen != screen)
 587                         continue;
 588
 589                 struct Colortriple *color;
 590                 Workspace *ws = &workspaces[c];
 591
 592                 if (screen->current_workspace == c)
 593                         color = &(config.bar.focused);
 594                 else if (ws->urgent)
 595                         color = &(config.bar.urgent);
 596                 else color = &(config.bar.unfocused);
 597
 598                 /* Draw the outer rect */
 599                 xcb_draw_rect(conn, screen->bar, screen->bargc, color->border,
 600                               drawn,              /* x */
 601                               1,                  /* y */
 602                               ws->text_width + 5 + 5, /* width = text width + 5 px left + 5px right */
 603                               height - 2          /* height = max. height - 1 px upper and 1 px bottom border */);
 604
 605                 /* Draw the background of this rect */
 606                 xcb_draw_rect(conn, screen->bar, screen->bargc, color->background,
 607                               drawn + 1,
 608                               2,
 609                               ws->text_width + 4 + 4,
 610                               height - 4);
 611
 612                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, color->text);
 613                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_BACKGROUND, color->background);
 614                 xcb_image_text_16(conn, ws->name_len, screen->bar, screen->bargc, drawn + 5 /* X */,
 615                                   font->height + 1 /* Y = baseline of font */,
 616                                   (xcb_char2b_t*)ws->name);
 617                 drawn += ws->text_width + 12;
 618         }
 619 }
 620
 621 /*
 622  * Modifies the event mask of all clients on the given workspace to either ignore or to handle
 623  * enter notifies. It is handy to ignore notifies because they will be sent when a window is mapped
 624  * under the cursor, thus when the user didn’t enter the window actively at all.
 625  *
 626  */
 627 void ignore_enter_notify_forall(xcb_connection_t *conn, Workspace *workspace, bool ignore_enter_notify) {
 628         Client *client;
 629         uint32_t values[1];
 630
 631         FOR_TABLE(workspace)
 632                 CIRCLEQ_FOREACH(client, &(workspace->table[cols][rows]->clients), clients) {
 633                         /* Change event mask for the decorations */
 634                         values[0] = FRAME_EVENT_MASK;
 635                         if (ignore_enter_notify)
 636                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 637                         xcb_change_window_attributes(conn, client->frame, XCB_CW_EVENT_MASK, values);
 638
 639                         /* Change event mask for the child itself */
 640                         values[0] = CHILD_EVENT_MASK;
 641                         if (ignore_enter_notify)
 642                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 643                         xcb_change_window_attributes(conn, client->child, XCB_CW_EVENT_MASK, values);
 644                 }
 645 }
 646
 647 /*
 648  * Renders the given workspace on the given screen
 649  *
 650  */
 651 void render_workspace(xcb_connection_t *conn, i3Screen *screen, Workspace *r_ws) {
 652         i3Font *font = load_font(conn, config.font);
 653         int width = r_ws->rect.width;
 654         int height = r_ws->rect.height;
 655
 656         /* Reserve space for dock clients */
 657         Client *client;
 658         SLIST_FOREACH(client, &(screen->dock_clients), dock_clients)
 659                 height -= client->desired_height;
 660
 661         /* Space for the internal bar */
 662         height -= (font->height + 6);
 663
 664         int xoffset[r_ws->rows];
 665         int yoffset[r_ws->cols];
 666         /* Initialize offsets */
 667         for (int cols = 0; cols < r_ws->cols; cols++)
 668                 yoffset[cols] = r_ws->rect.y;
 669         for (int rows = 0; rows < r_ws->rows; rows++)
 670                 xoffset[rows] = r_ws->rect.x;
 671
 672         ignore_enter_notify_forall(conn, r_ws, true);
 673
 674         /* Go through the whole table and render what’s necessary */
 675         FOR_TABLE(r_ws) {
 676                 Container *container = r_ws->table[cols][rows];
 677                 int single_width = -1, single_height = -1;
 678                 /* Update position of the container */
 679                 container->row = rows;
 680                 container->col = cols;
 681                 container->x = xoffset[rows];
 682                 container->y = yoffset[cols];
 683                 container->width = 0;
 684
 685                 for (int c = 0; c < container->colspan; c++) {
 686                         if (r_ws->width_factor[cols+c] == 0)
 687                                 container->width += (width / r_ws->cols);
 688                         else container->width += get_unoccupied_x(r_ws) * r_ws->width_factor[cols+c];
 689
 690                         if (single_width == -1)
 691                                 single_width = container->width;
 692                 }
 693
 694                 LOG("height is %d\n", height);
 695
 696                 container->height = 0;
 697
 698                 for (int c = 0; c < container->rowspan; c++) {
 699                         if (r_ws->height_factor[rows+c] == 0)
 700                                 container->height += (height / r_ws->rows);
 701                         else container->height += get_unoccupied_y(r_ws) * r_ws->height_factor[rows+c];
 702
 703                         if (single_height == -1)
 704                                 single_height = container->height;
 705                 }
 706
 707                 /* Render the container if it is not empty */
 708                 render_container(conn, container);
 709
 710                 xoffset[rows] += single_width;
 711                 yoffset[cols] += single_height;
 712         }
 713
 714         ignore_enter_notify_forall(conn, r_ws, false);
 715
 716         render_bars(conn, r_ws, width, &height);
 717         render_internal_bar(conn, r_ws, width, font->height + 6);
 718 }
 719
 720 /*
 721  * Renders the whole layout, that is: Go through each screen, each workspace, each container
 722  * and render each client. This also renders the bars.
 723  *
 724  * If you don’t need to render *everything*, you should call render_container on the container
 725  * you want to refresh.
 726  *
 727  */
 728 void render_layout(xcb_connection_t *conn) {
 729         i3Screen *screen;
 730
 731         TAILQ_FOREACH(screen, virtual_screens, screens)
 732                 render_workspace(conn, screen, &(workspaces[screen->current_workspace]));
 733
 734         xcb_flush(conn);
 735 }