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 #include "workspace.h"
  31
  32 /*
  33  * Updates *destination with new_value and returns true if it was changed or false
  34  * if it was the same
  35  *
  36  */
  37 static bool update_if_necessary(uint32_t *destination, const uint32_t new_value) {
  38         uint32_t old_value = *destination;
  39
  40         return ((*destination = new_value) != old_value);
  41 }
  42
  43 /*
  44  * Gets the unoccupied space (= space which is available for windows which were resized by the user)
  45  * for the given row. This is necessary to render both, customly resized windows and never touched
  46  * windows correctly, meaning that the aspect ratio will be maintained when opening new windows.
  47  *
  48  */
  49 int get_unoccupied_x(Workspace *workspace) {
  50         int unoccupied = workspace->rect.width;
  51         float default_factor = ((float)workspace->rect.width / workspace->cols) / workspace->rect.width;
  52
  53         LOG("get_unoccupied_x(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
  54
  55         for (int cols = 0; cols < workspace->cols; cols++) {
  56                 LOG("width_factor[%d] = %f\n", cols, workspace->width_factor[cols]);
  57
  58                 if (workspace->width_factor[cols] == 0)
  59                         unoccupied -= workspace->rect.width * default_factor;
  60         }
  61
  62         LOG("unoccupied space: %d\n", unoccupied);
  63         return unoccupied;
  64 }
  65
  66 /* See get_unoccupied_x() */
  67 int get_unoccupied_y(Workspace *workspace) {
  68         int height = workspace->rect.height;
  69         i3Font *font = load_font(global_conn, config.font);
  70
  71         /* Reserve space for dock clients */
  72         Client *client;
  73         SLIST_FOREACH(client, &(workspace->screen->dock_clients), dock_clients)
  74                 height -= client->desired_height;
  75
  76         /* Space for the internal bar */
  77         height -= (font->height + 6);
  78
  79         int unoccupied = height;
  80         float default_factor = ((float)height / workspace->rows) / height;
  81
  82         LOG("get_unoccupied_y(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
  83
  84         for (int rows = 0; rows < workspace->rows; rows++) {
  85                 LOG("height_factor[%d] = %f\n", rows, workspace->height_factor[rows]);
  86                 if (workspace->height_factor[rows] == 0)
  87                         unoccupied -= height * default_factor;
  88         }
  89
  90         LOG("unoccupied space: %d\n", unoccupied);
  91         return unoccupied;
  92 }
  93
  94 /*
  95  * Redecorates the given client correctly by checking if it’s in a stacking container and
  96  * re-rendering the stack window or just calling decorate_window if it’s not in a stacking
  97  * container.
  98  *
  99  */
 100 void redecorate_window(xcb_connection_t *conn, Client *client) {
 101         if (client->container != NULL &&
 102             (client->container->mode == MODE_STACK ||
 103              client->container->mode == MODE_TABBED)) {
 104                 render_container(conn, client->container);
 105                 /* We clear the frame to generate exposure events, because the color used
 106                    in drawing may be different */
 107                 xcb_clear_area(conn, true, client->frame, 0, 0, client->rect.width, client->rect.height);
 108         } else decorate_window(conn, client, client->frame, client->titlegc, 0, 0);
 109         xcb_flush(conn);
 110 }
 111
 112 /*
 113  * (Re-)draws window decorations for a given Client onto the given drawable/graphic context.
 114  * When in stacking mode, the window decorations are drawn onto an own window.
 115  *
 116  */
 117 void decorate_window(xcb_connection_t *conn, Client *client, xcb_drawable_t drawable,
 118                      xcb_gcontext_t gc, int offset_x, int offset_y) {
 119         i3Font *font = load_font(conn, config.font);
 120         int decoration_height = font->height + 2 + 2;
 121         struct Colortriple *color;
 122         Client *last_focused;
 123
 124         /* Clients without a container (docks) won’t get decorated */
 125         if (client->dock)
 126                 return;
 127
 128         last_focused = SLIST_FIRST(&(client->workspace->focus_stack));
 129         /* Is the window urgent? */
 130         if (client->urgent)
 131                 color = &(config.client.urgent);
 132         else {
 133                 if (client_is_floating(client)) {
 134                         if (last_focused == client)
 135                                 color = &(config.client.focused);
 136                         else color = &(config.client.unfocused);
 137                 } else {
 138                         if (client->container->currently_focused == client) {
 139                                 /* Distinguish if the window is currently focused… */
 140                                 if (last_focused == client && c_ws == client->workspace)
 141                                         color = &(config.client.focused);
 142                                 /* …or if it is the focused window in a not focused container */
 143                                 else color = &(config.client.focused_inactive);
 144                         } else color = &(config.client.unfocused);
 145                 }
 146         }
 147
 148         /* Our plan is the following:
 149            - Draw a rect around the whole client in color->background
 150            - Draw two lines in a lighter color
 151            - Draw the window’s title
 152          */
 153
 154         /* Draw a rectangle in background color around the window */
 155         if (client->borderless && (client->container == NULL ||
 156             (client->container->mode != MODE_STACK &&
 157              client->container->mode != MODE_TABBED)))
 158                 xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 159         else xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, color->background);
 160
 161         /* In stacking mode, we only render the rect for this specific decoration */
 162         if (client->container != NULL && (client->container->mode == MODE_STACK || client->container->mode == MODE_TABBED)) {
 163                 /* We need to use the container’s width because it is the more recent value - when
 164                    in stacking mode, clients get reconfigured only on demand (the not active client
 165                    is not reconfigured), so the client’s rect.width would be wrong */
 166                 xcb_rectangle_t rect = {offset_x, offset_y,
 167                                         offset_x + client->container->width,
 168                                         offset_y + decoration_height };
 169                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 170         } else {
 171                 xcb_rectangle_t rect = {0, 0, client->rect.width, client->rect.height};
 172                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 173
 174                 /* Draw the inner background to have a black frame around clients (such as mplayer)
 175                    which cannot be resized exactly in our frames and therefore are centered */
 176                 xcb_change_gc_single(conn, client->titlegc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 177                 xcb_rectangle_t crect = {2, decoration_height,
 178                                          client->rect.width - (2 + 2), client->rect.height - 2 - decoration_height};
 179                 xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 180         }
 181
 182         if (client->titlebar_position != TITLEBAR_OFF) {
 183                 /* Draw the lines */
 184                 xcb_draw_line(conn, drawable, gc, color->border, offset_x, offset_y, offset_x + client->rect.width, offset_y);
 185                 if ((client->container == NULL ||
 186                     (client->container->mode != MODE_STACK &&
 187                      client->container->mode != MODE_TABBED) ||
 188                     CIRCLEQ_NEXT_OR_NULL(&(client->container->clients), client, clients) == NULL))
 189                         xcb_draw_line(conn, drawable, gc, color->border,
 190                                       offset_x + 2, /* x */
 191                                       offset_y + font->height + 3, /* y */
 192                                       offset_x + client->rect.width - 3, /* to_x */
 193                                       offset_y + font->height + 3 /* to_y */);
 194         }
 195
 196         /* If the client has a title, we draw it */
 197         if (client->name != NULL) {
 198                 /* Draw the font */
 199                 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
 200                 uint32_t values[] = { color->text, color->background, font->id };
 201                 xcb_change_gc(conn, gc, mask, values);
 202
 203                 /* name_len == -1 means this is a legacy application which does not specify _NET_WM_NAME,
 204                    and we don’t handle the old window name (COMPOUND_TEXT) but only _NET_WM_NAME, which
 205                    is UTF-8 */
 206                 if (client->name_len == -1)
 207                         xcb_image_text_8(conn, strlen(client->name), drawable, gc, offset_x + 3 /* X */,
 208                                          offset_y + font->height /* Y = baseline of font */, client->name);
 209                 else
 210                         xcb_image_text_16(conn, client->name_len, drawable, gc, offset_x + 3 /* X */,
 211                                           offset_y + font->height /* Y = baseline of font */, (xcb_char2b_t*)client->name);
 212         }
 213 }
 214
 215 /*
 216  * Pushes the client’s x and y coordinates to X11
 217  *
 218  */
 219 void reposition_client(xcb_connection_t *conn, Client *client) {
 220         i3Screen *screen;
 221
 222         LOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 223         /* Note: We can use a pointer to client->x like an array of uint32_ts
 224            because it is followed by client->y by definition */
 225         xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
 226
 227         if (!client_is_floating(client))
 228                 return;
 229
 230         /* If the client is floating, we need to check if we moved it to a different workspace */
 231         if (client->workspace->screen == (screen = get_screen_containing(client->rect.x, client->rect.y)))
 232                 return;
 233
 234         if (screen == NULL) {
 235                 LOG("Boundary checking disabled, no screen found for (%d, %d)\n", client->rect.x, client->rect.y);
 236                 return;
 237         }
 238
 239         LOG("Client is on workspace %p with screen %p\n", client->workspace, client->workspace->screen);
 240         LOG("but screen at %d, %d is %p\n", client->rect.x, client->rect.y, screen);
 241         floating_assign_to_workspace(client, workspace_get(screen->current_workspace));
 242 }
 243
 244 /*
 245  * Pushes the client’s width/height to X11 and resizes the child window. This
 246  * function also updates the client’s position, so if you work on tiling clients
 247  * only, you can use this function instead of separate calls to reposition_client
 248  * and resize_client to reduce flickering.
 249  *
 250  */
 251 void resize_client(xcb_connection_t *conn, Client *client) {
 252         i3Font *font = load_font(conn, config.font);
 253
 254         LOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 255         LOG("resizing client 0x%08x to %d x %d\n", client->frame, client->rect.width, client->rect.height);
 256         xcb_configure_window(conn, client->frame,
 257                         XCB_CONFIG_WINDOW_X |
 258                         XCB_CONFIG_WINDOW_Y |
 259                         XCB_CONFIG_WINDOW_WIDTH |
 260                         XCB_CONFIG_WINDOW_HEIGHT,
 261                         &(client->rect.x));
 262
 263         /* Adjust the position of the child inside its frame.
 264          * The coordinates of the child are relative to its frame, we
 265          * add a border of 2 pixel to each value */
 266         uint32_t mask = XCB_CONFIG_WINDOW_X |
 267                         XCB_CONFIG_WINDOW_Y |
 268                         XCB_CONFIG_WINDOW_WIDTH |
 269                         XCB_CONFIG_WINDOW_HEIGHT;
 270         Rect *rect = &(client->child_rect);
 271         switch ((client->container != NULL ? client->container->mode : MODE_DEFAULT)) {
 272                 case MODE_STACK:
 273                 case MODE_TABBED:
 274                         rect->x = 2;
 275                         rect->y = 0;
 276                         rect->width = client->rect.width - (2 + 2);
 277                         rect->height = client->rect.height - 2;
 278                         break;
 279                 default:
 280                         if (client->titlebar_position == TITLEBAR_OFF && client->borderless) {
 281                                 rect->x = 0;
 282                                 rect->y = 0;
 283                                 rect->width = client->rect.width;
 284                                 rect->height = client->rect.height;
 285                         } else if (client->titlebar_position == TITLEBAR_OFF && !client->borderless) {
 286                                 rect->x = 1;
 287                                 rect->y = 1;
 288                                 rect->width = client->rect.width - 1 - 1;
 289                                 rect->height = client->rect.height - 1 - 1;
 290                         } else {
 291                                 rect->x = 2;
 292                                 rect->y = font->height + 2 + 2;
 293                                 rect->width = client->rect.width - (2 + 2);
 294                                 rect->height = client->rect.height - ((font->height + 2 + 2) + 2);
 295                         }
 296                         break;
 297         }
 298
 299         rect->width -= (2 * client->border_width);
 300         rect->height -= (2 * client->border_width);
 301
 302         /* Obey the ratio, if any */
 303         if (client->proportional_height != 0 &&
 304             client->proportional_width != 0) {
 305                 LOG("proportional height = %d, width = %d\n", client->proportional_height, client->proportional_width);
 306                 double new_height = rect->height + 1;
 307                 int new_width = rect->width;
 308
 309                 while (new_height > rect->height) {
 310                         new_height = ((double)client->proportional_height / client->proportional_width) * new_width;
 311
 312                         if (new_height > rect->height)
 313                                 new_width--;
 314                 }
 315                 /* Center the window */
 316                 rect->y += ceil(rect->height / 2) - floor(new_height / 2);
 317                 rect->x += ceil(rect->width / 2) - floor(new_width / 2);
 318
 319                 rect->height = new_height;
 320                 rect->width = new_width;
 321                 LOG("new_height = %f, new_width = %d\n", new_height, new_width);
 322         }
 323
 324         if (client->height_increment > 1) {
 325                 int old_height = rect->height;
 326                 rect->height -= (rect->height - client->base_height) % client->height_increment;
 327                 LOG("Lost %d pixel due to client's height_increment (%d px)\n",
 328                     old_height - rect->height, client->height_increment);
 329         }
 330
 331         if (client->width_increment > 1) {
 332                 int old_width = rect->width;
 333                 rect->width -= (rect->width - client->base_width) % client->width_increment;
 334                 LOG("Lost %d pixel due to client's width_increment (%d px)\n",
 335                     old_width - rect->width, client->width_increment);
 336         }
 337
 338         LOG("child will be at %dx%d with size %dx%d\n", rect->x, rect->y, rect->width, rect->height);
 339
 340         xcb_configure_window(conn, client->child, mask, &(rect->x));
 341
 342         /* After configuring a child window we need to fake a configure_notify_event (see ICCCM 4.2.3).
 343          * This is necessary to inform the client of its position relative to the root window,
 344          * not relative to its frame (as done in the configure_notify_event by the x server). */
 345         fake_absolute_configure_notify(conn, client);
 346
 347         /* Force redrawing after resizing the window because any now lost
 348          * pixels could contain old garbage. */
 349         xcb_expose_event_t generated;
 350         generated.window = client->frame;
 351         generated.count = 0;
 352         handle_expose_event(NULL, conn, &generated);
 353 }
 354
 355 /*
 356  * Renders the given container. Is called by render_layout() or individually (for example
 357  * when focus changes in a stacking container)
 358  *
 359  */
 360 void render_container(xcb_connection_t *conn, Container *container) {
 361         Client *client;
 362         int num_clients = 0, current_client = 0;
 363
 364         CIRCLEQ_FOREACH(client, &(container->clients), clients)
 365                 num_clients++;
 366
 367         if (container->mode == MODE_DEFAULT) {
 368                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 369                         /* If the client is in fullscreen mode, it does not get reconfigured */
 370                         if (container->workspace->fullscreen_client == client) {
 371                                 current_client++;
 372                                 continue;
 373                         }
 374
 375                         /* Check if we changed client->x or client->y by updating it.
 376                          * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 377                         if (client->force_reconfigure |
 378                             update_if_necessary(&(client->rect.x), container->x) |
 379                             update_if_necessary(&(client->rect.y), container->y +
 380                                         (container->height / num_clients) * current_client) |
 381                             update_if_necessary(&(client->rect.width), container->width) |
 382                             update_if_necessary(&(client->rect.height), container->height / num_clients))
 383                                 resize_client(conn, client);
 384
 385                         /* TODO: vertical default layout */
 386
 387                         client->force_reconfigure = false;
 388
 389                         current_client++;
 390                 }
 391         } else {
 392                 i3Font *font = load_font(conn, config.font);
 393                 int decoration_height = (font->height + 2 + 2);
 394                 struct Stack_Window *stack_win = &(container->stack_win);
 395                 /* The size for each tab (width), necessary as a separate variable
 396                  * because num_clients gets fixed to 1 in tabbed mode. */
 397                 int size_each = (num_clients == 0 ? container->width : container->width / num_clients);
 398                 int stack_lines = num_clients;
 399
 400                 /* Check if we need to remap our stack title window, it gets unmapped when the container
 401                    is empty in src/handlers.c:unmap_notify() */
 402                 if (stack_win->rect.height == 0 && num_clients > 0) {
 403                         LOG("remapping stack win\n");
 404                         xcb_map_window(conn, stack_win->window);
 405                 } else LOG("not remapping stackwin, height = %d, num_clients = %d\n",
 406                                 stack_win->rect.height, num_clients);
 407
 408                 if (container->mode == MODE_TABBED) {
 409                         /* By setting num_clients to 1 we force that the stack window will be only one line
 410                          * high. The rest of the code is useful in both cases. */
 411                         LOG("tabbed mode, setting num_clients = 1\n");
 412                         if (stack_lines > 1)
 413                                 stack_lines = 1;
 414                 }
 415
 416                 if (container->stack_limit == STACK_LIMIT_COLS) {
 417                         stack_lines = ceil((float)num_clients / container->stack_limit_value);
 418                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 419                         stack_lines = min(num_clients, container->stack_limit_value);
 420                 }
 421
 422                 /* Check if we need to reconfigure our stack title window */
 423                 if (update_if_necessary(&(stack_win->rect.x), container->x) |
 424                     update_if_necessary(&(stack_win->rect.y), container->y) |
 425                     update_if_necessary(&(stack_win->rect.width), container->width) |
 426                     update_if_necessary(&(stack_win->rect.height), decoration_height * stack_lines)) {
 427
 428                         /* Configuration can happen in two slightly different ways:
 429
 430                            If there is no client in fullscreen mode, 5 parameters are passed
 431                            (x, y, width, height, stack mode is set to above which means top-most position).
 432
 433                            If there is a fullscreen client, the fourth parameter is set to to the
 434                            fullscreen window as sibling and the stack mode is set to below, which means
 435                            that the stack_window will be placed just below the sibling, that is, under
 436                            the fullscreen window.
 437                          */
 438                         uint32_t values[] = { stack_win->rect.x, stack_win->rect.y,
 439                                               stack_win->rect.width, stack_win->rect.height,
 440                                               XCB_STACK_MODE_ABOVE, XCB_STACK_MODE_BELOW };
 441                         uint32_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
 442                                         XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT |
 443                                         XCB_CONFIG_WINDOW_STACK_MODE;
 444
 445                         /* Raise the stack window, but keep it below the first floating client
 446                          * and below the fullscreen client (if any) */
 447                         Client *first_floating = TAILQ_FIRST(&(container->workspace->floating_clients));
 448                         if (first_floating != TAILQ_END(&(container->workspace->floating_clients))) {
 449                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 450                                 values[4] = first_floating->frame;
 451                         } else if (container->workspace->fullscreen_client != NULL) {
 452                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 453                                 values[4] = container->workspace->fullscreen_client->frame;
 454                         }
 455
 456                         xcb_configure_window(conn, stack_win->window, mask, values);
 457                 }
 458
 459                 /* Prepare the pixmap for usage */
 460                 cached_pixmap_prepare(conn, &(stack_win->pixmap));
 461
 462                 int current_row = 0, current_col = 0;
 463                 int wrap = 0;
 464
 465                 if (container->stack_limit == STACK_LIMIT_COLS) {
 466                         /* wrap stores the number of rows after which we will
 467                          * wrap to a new column. */
 468                         wrap = ceil((float)num_clients / container->stack_limit_value);
 469                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 470                         /* When limiting rows, the wrap variable serves a
 471                          * slightly different purpose: it holds the number of
 472                          * pixels which each client will get. This is constant
 473                          * during the following loop, so it saves us some
 474                          * divisions and ceil()ing. */
 475                         wrap = (stack_win->rect.width / ceil((float)num_clients / container->stack_limit_value));
 476                 }
 477
 478                 /* Render the decorations of all clients */
 479                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 480                         /* If the client is in fullscreen mode, it does not get reconfigured */
 481                         if (container->workspace->fullscreen_client == client) {
 482                                 current_client++;
 483                                 continue;
 484                         }
 485
 486                         /* Check if we changed client->x or client->y by updating it.
 487                          * Note the bitwise OR instead of logical OR to force evaluation of all statements */
 488                         if (client->force_reconfigure |
 489                             update_if_necessary(&(client->rect.x), container->x) |
 490                             update_if_necessary(&(client->rect.y), container->y + (decoration_height * stack_lines)) |
 491                             update_if_necessary(&(client->rect.width), container->width) |
 492                             update_if_necessary(&(client->rect.height), container->height - (decoration_height * stack_lines)))
 493                                 resize_client(conn, client);
 494
 495                         client->force_reconfigure = false;
 496
 497                         int offset_x = 0;
 498                         int offset_y = 0;
 499                         if (container->mode == MODE_STACK) {
 500                                 if (container->stack_limit == STACK_LIMIT_COLS) {
 501                                         offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 502                                         offset_y = current_row * decoration_height;
 503                                         current_row++;
 504                                         if ((current_row % wrap) == 0) {
 505                                                 current_col++;
 506                                                 current_row = 0;
 507                                         }
 508                                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 509                                         offset_x = current_col * wrap;
 510                                         offset_y = current_row * decoration_height;
 511                                         current_row++;
 512                                         if ((current_row % container->stack_limit_value) == 0) {
 513                                                 current_col++;
 514                                                 current_row = 0;
 515                                         }
 516                                 } else {
 517                                         offset_y = current_client * decoration_height;
 518                                 }
 519                                 current_client++;
 520                         } else if (container->mode == MODE_TABBED)
 521                                 offset_x = current_client++ * size_each;
 522                         decorate_window(conn, client, stack_win->pixmap.id, stack_win->pixmap.gc,
 523                                         offset_x, offset_y);
 524                 }
 525
 526                 /* Check if we need to fill one column because of an uneven
 527                  * amount of windows */
 528                 if (container->mode == MODE_STACK) {
 529                         if (container->stack_limit == STACK_LIMIT_COLS && (current_col % 2) != 0) {
 530                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 531
 532                                 int offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 533                                 int offset_y = current_row * decoration_height;
 534                                 xcb_rectangle_t rect = {offset_x, offset_y,
 535                                                         offset_x + container->width,
 536                                                         offset_y + decoration_height };
 537                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 538                         } else if (container->stack_limit == STACK_LIMIT_ROWS && (current_row % 2) != 0) {
 539                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 540
 541                                 int offset_x = current_col * wrap;
 542                                 int offset_y = current_row * decoration_height;
 543                                 xcb_rectangle_t rect = {offset_x, offset_y,
 544                                                         offset_x + container->width,
 545                                                         offset_y + decoration_height };
 546                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 547                         }
 548                 }
 549
 550                 xcb_copy_area(conn, stack_win->pixmap.id, stack_win->window, stack_win->pixmap.gc,
 551                               0, 0, 0, 0, stack_win->rect.width, stack_win->rect.height);
 552         }
 553 }
 554
 555 static void render_bars(xcb_connection_t *conn, Workspace *r_ws, int width, int *height) {
 556         Client *client;
 557         SLIST_FOREACH(client, &(r_ws->screen->dock_clients), dock_clients) {
 558                 LOG("client is at %d, should be at %d\n", client->rect.y, *height);
 559                 if (client->force_reconfigure |
 560                     update_if_necessary(&(client->rect.x), r_ws->rect.x) |
 561                     update_if_necessary(&(client->rect.y), *height))
 562                         reposition_client(conn, client);
 563
 564                 if (client->force_reconfigure |
 565                     update_if_necessary(&(client->rect.width), width) |
 566                     update_if_necessary(&(client->rect.height), client->desired_height))
 567                         resize_client(conn, client);
 568
 569                 client->force_reconfigure = false;
 570                 LOG("desired_height = %d\n", client->desired_height);
 571                 *height += client->desired_height;
 572         }
 573 }
 574
 575 static void render_internal_bar(xcb_connection_t *conn, Workspace *r_ws, int width, int height) {
 576         i3Font *font = load_font(conn, config.font);
 577         i3Screen *screen = r_ws->screen;
 578         enum { SET_NORMAL = 0, SET_FOCUSED = 1 };
 579
 580         /* Fill the whole bar in black */
 581         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 582         xcb_rectangle_t rect = {0, 0, width, height};
 583         xcb_poly_fill_rectangle(conn, screen->bar, screen->bargc, 1, &rect);
 584
 585         /* Set font */
 586         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FONT, font->id);
 587
 588         int drawn = 0;
 589         for (int c = 0; c < num_workspaces; c++) {
 590                 if (workspaces[c].screen != screen)
 591                         continue;
 592
 593                 struct Colortriple *color;
 594                 Workspace *ws = &workspaces[c];
 595
 596                 if (screen->current_workspace == c)
 597                         color = &(config.bar.focused);
 598                 else if (ws->urgent)
 599                         color = &(config.bar.urgent);
 600                 else color = &(config.bar.unfocused);
 601
 602                 /* Draw the outer rect */
 603                 xcb_draw_rect(conn, screen->bar, screen->bargc, color->border,
 604                               drawn,              /* x */
 605                               1,                  /* y */
 606                               ws->text_width + 5 + 5, /* width = text width + 5 px left + 5px right */
 607                               height - 2          /* height = max. height - 1 px upper and 1 px bottom border */);
 608
 609                 /* Draw the background of this rect */
 610                 xcb_draw_rect(conn, screen->bar, screen->bargc, color->background,
 611                               drawn + 1,
 612                               2,
 613                               ws->text_width + 4 + 4,
 614                               height - 4);
 615
 616                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, color->text);
 617                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_BACKGROUND, color->background);
 618                 xcb_image_text_16(conn, ws->name_len, screen->bar, screen->bargc, drawn + 5 /* X */,
 619                                   font->height + 1 /* Y = baseline of font */,
 620                                   (xcb_char2b_t*)ws->name);
 621                 drawn += ws->text_width + 12;
 622         }
 623 }
 624
 625 /*
 626  * Modifies the event mask of all clients on the given workspace to either ignore or to handle
 627  * enter notifies. It is handy to ignore notifies because they will be sent when a window is mapped
 628  * under the cursor, thus when the user didn’t enter the window actively at all.
 629  *
 630  */
 631 void ignore_enter_notify_forall(xcb_connection_t *conn, Workspace *workspace, bool ignore_enter_notify) {
 632         Client *client;
 633         uint32_t values[1];
 634
 635         FOR_TABLE(workspace) {
 636                 if (workspace->table[cols][rows] == NULL)
 637                         continue;
 638
 639                 CIRCLEQ_FOREACH(client, &(workspace->table[cols][rows]->clients), clients) {
 640                         /* Change event mask for the decorations */
 641                         values[0] = FRAME_EVENT_MASK;
 642                         if (ignore_enter_notify)
 643                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 644                         xcb_change_window_attributes(conn, client->frame, XCB_CW_EVENT_MASK, values);
 645
 646                         /* Change event mask for the child itself */
 647                         values[0] = CHILD_EVENT_MASK;
 648                         if (ignore_enter_notify)
 649                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 650                         xcb_change_window_attributes(conn, client->child, XCB_CW_EVENT_MASK, values);
 651                 }
 652         }
 653 }
 654
 655 /*
 656  * Renders the given workspace on the given screen
 657  *
 658  */
 659 void render_workspace(xcb_connection_t *conn, i3Screen *screen, Workspace *r_ws) {
 660         i3Font *font = load_font(conn, config.font);
 661         int width = r_ws->rect.width;
 662         int height = r_ws->rect.height;
 663
 664         /* Reserve space for dock clients */
 665         Client *client;
 666         SLIST_FOREACH(client, &(screen->dock_clients), dock_clients)
 667                 height -= client->desired_height;
 668
 669         /* Space for the internal bar */
 670         height -= (font->height + 6);
 671
 672         int xoffset[r_ws->rows];
 673         int yoffset[r_ws->cols];
 674         /* Initialize offsets */
 675         for (int cols = 0; cols < r_ws->cols; cols++)
 676                 yoffset[cols] = r_ws->rect.y;
 677         for (int rows = 0; rows < r_ws->rows; rows++)
 678                 xoffset[rows] = r_ws->rect.x;
 679
 680         ignore_enter_notify_forall(conn, r_ws, true);
 681
 682         /* Go through the whole table and render what’s necessary */
 683         FOR_TABLE(r_ws) {
 684                 Container *container = r_ws->table[cols][rows];
 685                 if (container == NULL)
 686                         continue;
 687                 int single_width = -1, single_height = -1;
 688                 /* Update position of the container */
 689                 container->row = rows;
 690                 container->col = cols;
 691                 container->x = xoffset[rows];
 692                 container->y = yoffset[cols];
 693                 container->width = 0;
 694
 695                 for (int c = 0; c < container->colspan; c++) {
 696                         if (r_ws->width_factor[cols+c] == 0)
 697                                 container->width += (width / r_ws->cols);
 698                         else container->width += get_unoccupied_x(r_ws) * r_ws->width_factor[cols+c];
 699
 700                         if (single_width == -1)
 701                                 single_width = container->width;
 702                 }
 703
 704                 LOG("height is %d\n", height);
 705
 706                 container->height = 0;
 707
 708                 for (int c = 0; c < container->rowspan; c++) {
 709                         if (r_ws->height_factor[rows+c] == 0)
 710                                 container->height += (height / r_ws->rows);
 711                         else container->height += get_unoccupied_y(r_ws) * r_ws->height_factor[rows+c];
 712
 713                         if (single_height == -1)
 714                                 single_height = container->height;
 715                 }
 716
 717                 /* Render the container if it is not empty */
 718                 render_container(conn, container);
 719
 720                 xoffset[rows] += single_width;
 721                 yoffset[cols] += single_height;
 722         }
 723
 724         ignore_enter_notify_forall(conn, r_ws, false);
 725
 726         render_bars(conn, r_ws, width, &height);
 727         render_internal_bar(conn, r_ws, width, font->height + 6);
 728 }
 729
 730 /*
 731  * Renders the whole layout, that is: Go through each screen, each workspace, each container
 732  * and render each client. This also renders the bars.
 733  *
 734  * If you don’t need to render *everything*, you should call render_container on the container
 735  * you want to refresh.
 736  *
 737  */
 738 void render_layout(xcb_connection_t *conn) {
 739         i3Screen *screen;
 740
 741         if (virtual_screens == NULL)
 742                 return;
 743
 744         TAILQ_FOREACH(screen, virtual_screens, screens)
 745                 render_workspace(conn, screen, &(workspaces[screen->current_workspace]));
 746
 747         xcb_flush(conn);
 748 }