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