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                 if (client->titlebar_position == TITLEBAR_OFF) {
 178                         xcb_rectangle_t crect = {1, 1, client->rect.width - (1 + 1), client->rect.height - (1 + 1)};
 179                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 180                 } else {
 181                         xcb_rectangle_t crect = {2, decoration_height,
 182                                                  client->rect.width - (2 + 2), client->rect.height - 2 - decoration_height};
 183                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 184                 }
 185         }
 186
 187         if (client->titlebar_position != TITLEBAR_OFF) {
 188                 /* Draw the lines */
 189                 xcb_draw_line(conn, drawable, gc, color->border, offset_x, offset_y, offset_x + client->rect.width, offset_y);
 190                 if ((client->container == NULL ||
 191                     (client->container->mode != MODE_STACK &&
 192                      client->container->mode != MODE_TABBED) ||
 193                     CIRCLEQ_NEXT_OR_NULL(&(client->container->clients), client, clients) == NULL))
 194                         xcb_draw_line(conn, drawable, gc, color->border,
 195                                       offset_x + 2, /* x */
 196                                       offset_y + font->height + 3, /* y */
 197                                       offset_x + client->rect.width - 3, /* to_x */
 198                                       offset_y + font->height + 3 /* to_y */);
 199         }
 200
 201         /* If the client has a title, we draw it */
 202         if (client->name != NULL) {
 203                 /* Draw the font */
 204                 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
 205                 uint32_t values[] = { color->text, color->background, font->id };
 206                 xcb_change_gc(conn, gc, mask, values);
 207
 208                 /* name_len == -1 means this is a legacy application which does not specify _NET_WM_NAME,
 209                    and we don’t handle the old window name (COMPOUND_TEXT) but only _NET_WM_NAME, which
 210                    is UTF-8 */
 211                 if (client->name_len == -1)
 212                         xcb_image_text_8(conn, strlen(client->name), drawable, gc, offset_x + 3 /* X */,
 213                                          offset_y + font->height /* Y = baseline of font */, client->name);
 214                 else
 215                         xcb_image_text_16(conn, client->name_len, drawable, gc, offset_x + 3 /* X */,
 216                                           offset_y + font->height /* Y = baseline of font */, (xcb_char2b_t*)client->name);
 217         }
 218 }
 219
 220 /*
 221  * Pushes the client’s x and y coordinates to X11
 222  *
 223  */
 224 void reposition_client(xcb_connection_t *conn, Client *client) {
 225         i3Screen *screen;
 226
 227         LOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 228         /* Note: We can use a pointer to client->x like an array of uint32_ts
 229            because it is followed by client->y by definition */
 230         xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
 231
 232         if (!client_is_floating(client))
 233                 return;
 234
 235         /* If the client is floating, we need to check if we moved it to a different workspace */
 236         if (client->workspace->screen == (screen = get_screen_containing(client->rect.x, client->rect.y)))
 237                 return;
 238
 239         if (screen == NULL) {
 240                 LOG("Boundary checking disabled, no screen found for (%d, %d)\n", client->rect.x, client->rect.y);
 241                 return;
 242         }
 243
 244         LOG("Client is on workspace %p with screen %p\n", client->workspace, client->workspace->screen);
 245         LOG("but screen at %d, %d is %p\n", client->rect.x, client->rect.y, screen);
 246         floating_assign_to_workspace(client, screen->current_workspace);
 247 }
 248
 249 /*
 250  * Pushes the client’s width/height to X11 and resizes the child window. This
 251  * function also updates the client’s position, so if you work on tiling clients
 252  * only, you can use this function instead of separate calls to reposition_client
 253  * and resize_client to reduce flickering.
 254  *
 255  */
 256 void resize_client(xcb_connection_t *conn, Client *client) {
 257         i3Font *font = load_font(conn, config.font);
 258
 259         LOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 260         LOG("resizing client 0x%08x to %d x %d\n", client->frame, client->rect.width, client->rect.height);
 261         xcb_configure_window(conn, client->frame,
 262                         XCB_CONFIG_WINDOW_X |
 263                         XCB_CONFIG_WINDOW_Y |
 264                         XCB_CONFIG_WINDOW_WIDTH |
 265                         XCB_CONFIG_WINDOW_HEIGHT,
 266                         &(client->rect.x));
 267
 268         /* Adjust the position of the child inside its frame.
 269          * The coordinates of the child are relative to its frame, we
 270          * add a border of 2 pixel to each value */
 271         uint32_t mask = XCB_CONFIG_WINDOW_X |
 272                         XCB_CONFIG_WINDOW_Y |
 273                         XCB_CONFIG_WINDOW_WIDTH |
 274                         XCB_CONFIG_WINDOW_HEIGHT;
 275         Rect *rect = &(client->child_rect);
 276         switch ((client->container != NULL ? client->container->mode : MODE_DEFAULT)) {
 277                 case MODE_STACK:
 278                 case MODE_TABBED:
 279                         rect->x = 2;
 280                         rect->y = 0;
 281                         rect->width = client->rect.width - (2 + 2);
 282                         rect->height = client->rect.height - 2;
 283                         break;
 284                 default:
 285                         if (client->titlebar_position == TITLEBAR_OFF && client->borderless) {
 286                                 rect->x = 0;
 287                                 rect->y = 0;
 288                                 rect->width = client->rect.width;
 289                                 rect->height = client->rect.height;
 290                         } else if (client->titlebar_position == TITLEBAR_OFF && !client->borderless) {
 291                                 rect->x = 1;
 292                                 rect->y = 1;
 293                                 rect->width = client->rect.width - 1 - 1;
 294                                 rect->height = client->rect.height - 1 - 1;
 295                         } else {
 296                                 rect->x = 2;
 297                                 rect->y = font->height + 2 + 2;
 298                                 rect->width = client->rect.width - (2 + 2);
 299                                 rect->height = client->rect.height - ((font->height + 2 + 2) + 2);
 300                         }
 301                         break;
 302         }
 303
 304         rect->width -= (2 * client->border_width);
 305         rect->height -= (2 * client->border_width);
 306
 307         /* Obey the ratio, if any */
 308         if (client->proportional_height != 0 &&
 309             client->proportional_width != 0) {
 310                 LOG("proportional height = %d, width = %d\n", client->proportional_height, client->proportional_width);
 311                 double new_height = rect->height + 1;
 312                 int new_width = rect->width;
 313
 314                 while (new_height > rect->height) {
 315                         new_height = ((double)client->proportional_height / client->proportional_width) * new_width;
 316
 317                         if (new_height > rect->height)
 318                                 new_width--;
 319                 }
 320                 /* Center the window */
 321                 rect->y += ceil(rect->height / 2) - floor(new_height / 2);
 322                 rect->x += ceil(rect->width / 2) - floor(new_width / 2);
 323
 324                 rect->height = new_height;
 325                 rect->width = new_width;
 326                 LOG("new_height = %f, new_width = %d\n", new_height, new_width);
 327         }
 328
 329         if (client->height_increment > 1) {
 330                 int old_height = rect->height;
 331                 rect->height -= (rect->height - client->base_height) % client->height_increment;
 332                 LOG("Lost %d pixel due to client's height_increment (%d px)\n",
 333                     old_height - rect->height, client->height_increment);
 334         }
 335
 336         if (client->width_increment > 1) {
 337                 int old_width = rect->width;
 338                 rect->width -= (rect->width - client->base_width) % client->width_increment;
 339                 LOG("Lost %d pixel due to client's width_increment (%d px)\n",
 340                     old_width - rect->width, client->width_increment);
 341         }
 342
 343         LOG("child will be at %dx%d with size %dx%d\n", rect->x, rect->y, rect->width, rect->height);
 344
 345         xcb_configure_window(conn, client->child, mask, &(rect->x));
 346
 347         /* After configuring a child window we need to fake a configure_notify_event (see ICCCM 4.2.3).
 348          * This is necessary to inform the client of its position relative to the root window,
 349          * not relative to its frame (as done in the configure_notify_event by the x server). */
 350         fake_absolute_configure_notify(conn, client);
 351
 352         /* Force redrawing after resizing the window because any now lost
 353          * pixels could contain old garbage. */
 354         xcb_expose_event_t generated;
 355         generated.window = client->frame;
 356         generated.count = 0;
 357         handle_expose_event(NULL, conn, &generated);
 358 }
 359
 360 /*
 361  * Renders the given container. Is called by render_layout() or individually (for example
 362  * when focus changes in a stacking container)
 363  *
 364  */
 365 void render_container(xcb_connection_t *conn, Container *container) {
 366         Client *client;
 367         int num_clients = 0, current_client = 0;
 368
 369         CIRCLEQ_FOREACH(client, &(container->clients), clients)
 370                 num_clients++;
 371
 372         if (container->mode == MODE_DEFAULT) {
 373                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 374                         /* If the client is in fullscreen mode, it does not get reconfigured */
 375                         if (container->workspace->fullscreen_client == client) {
 376                                 current_client++;
 377                                 continue;
 378                         }
 379
 380                         /* Check if we changed client->x or client->y by updating it.
 381                          * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 382                         if (client->force_reconfigure |
 383                             update_if_necessary(&(client->rect.x), container->x) |
 384                             update_if_necessary(&(client->rect.y), container->y +
 385                                         (container->height / num_clients) * current_client) |
 386                             update_if_necessary(&(client->rect.width), container->width) |
 387                             update_if_necessary(&(client->rect.height), container->height / num_clients))
 388                                 resize_client(conn, client);
 389
 390                         /* TODO: vertical default layout */
 391
 392                         client->force_reconfigure = false;
 393
 394                         current_client++;
 395                 }
 396         } else {
 397                 i3Font *font = load_font(conn, config.font);
 398                 int decoration_height = (font->height + 2 + 2);
 399                 struct Stack_Window *stack_win = &(container->stack_win);
 400                 /* The size for each tab (width), necessary as a separate variable
 401                  * because num_clients gets fixed to 1 in tabbed mode. */
 402                 int size_each = (num_clients == 0 ? container->width : container->width / num_clients);
 403                 int stack_lines = num_clients;
 404
 405                 /* Check if we need to remap our stack title window, it gets unmapped when the container
 406                    is empty in src/handlers.c:unmap_notify() */
 407                 if (stack_win->rect.height == 0 && num_clients > 0) {
 408                         LOG("remapping stack win\n");
 409                         xcb_map_window(conn, stack_win->window);
 410                 } else LOG("not remapping stackwin, height = %d, num_clients = %d\n",
 411                                 stack_win->rect.height, num_clients);
 412
 413                 if (container->mode == MODE_TABBED) {
 414                         /* By setting num_clients to 1 we force that the stack window will be only one line
 415                          * high. The rest of the code is useful in both cases. */
 416                         LOG("tabbed mode, setting num_clients = 1\n");
 417                         if (stack_lines > 1)
 418                                 stack_lines = 1;
 419                 }
 420
 421                 if (container->stack_limit == STACK_LIMIT_COLS) {
 422                         stack_lines = ceil((float)num_clients / container->stack_limit_value);
 423                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 424                         stack_lines = min(num_clients, container->stack_limit_value);
 425                 }
 426
 427                 /* Check if we need to reconfigure our stack title window */
 428                 if (update_if_necessary(&(stack_win->rect.x), container->x) |
 429                     update_if_necessary(&(stack_win->rect.y), container->y) |
 430                     update_if_necessary(&(stack_win->rect.width), container->width) |
 431                     update_if_necessary(&(stack_win->rect.height), decoration_height * stack_lines)) {
 432
 433                         /* Configuration can happen in two slightly different ways:
 434
 435                            If there is no client in fullscreen mode, 5 parameters are passed
 436                            (x, y, width, height, stack mode is set to above which means top-most position).
 437
 438                            If there is a fullscreen client, the fourth parameter is set to to the
 439                            fullscreen window as sibling and the stack mode is set to below, which means
 440                            that the stack_window will be placed just below the sibling, that is, under
 441                            the fullscreen window.
 442                          */
 443                         uint32_t values[] = { stack_win->rect.x, stack_win->rect.y,
 444                                               stack_win->rect.width, stack_win->rect.height,
 445                                               XCB_STACK_MODE_ABOVE, XCB_STACK_MODE_BELOW };
 446                         uint32_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
 447                                         XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT |
 448                                         XCB_CONFIG_WINDOW_STACK_MODE;
 449
 450                         /* Raise the stack window, but keep it below the first floating client
 451                          * and below the fullscreen client (if any) */
 452                         Client *first_floating = TAILQ_FIRST(&(container->workspace->floating_clients));
 453                         if (first_floating != TAILQ_END(&(container->workspace->floating_clients))) {
 454                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 455                                 values[4] = first_floating->frame;
 456                         } else if (container->workspace->fullscreen_client != NULL) {
 457                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 458                                 values[4] = container->workspace->fullscreen_client->frame;
 459                         }
 460
 461                         xcb_configure_window(conn, stack_win->window, mask, values);
 462                 }
 463
 464                 /* Prepare the pixmap for usage */
 465                 cached_pixmap_prepare(conn, &(stack_win->pixmap));
 466
 467                 int current_row = 0, current_col = 0;
 468                 int wrap = 0;
 469
 470                 if (container->stack_limit == STACK_LIMIT_COLS) {
 471                         /* wrap stores the number of rows after which we will
 472                          * wrap to a new column. */
 473                         wrap = ceil((float)num_clients / container->stack_limit_value);
 474                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 475                         /* When limiting rows, the wrap variable serves a
 476                          * slightly different purpose: it holds the number of
 477                          * pixels which each client will get. This is constant
 478                          * during the following loop, so it saves us some
 479                          * divisions and ceil()ing. */
 480                         wrap = (stack_win->rect.width / ceil((float)num_clients / container->stack_limit_value));
 481                 }
 482
 483                 /* Render the decorations of all clients */
 484                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 485                         /* If the client is in fullscreen mode, it does not get reconfigured */
 486                         if (container->workspace->fullscreen_client == client) {
 487                                 current_client++;
 488                                 continue;
 489                         }
 490
 491                         /* Check if we changed client->x or client->y by updating it.
 492                          * Note the bitwise OR instead of logical OR to force evaluation of all statements */
 493                         if (client->force_reconfigure |
 494                             update_if_necessary(&(client->rect.x), container->x) |
 495                             update_if_necessary(&(client->rect.y), container->y + (decoration_height * stack_lines)) |
 496                             update_if_necessary(&(client->rect.width), container->width) |
 497                             update_if_necessary(&(client->rect.height), container->height - (decoration_height * stack_lines)))
 498                                 resize_client(conn, client);
 499
 500                         client->force_reconfigure = false;
 501
 502                         int offset_x = 0;
 503                         int offset_y = 0;
 504                         if (container->mode == MODE_STACK) {
 505                                 if (container->stack_limit == STACK_LIMIT_COLS) {
 506                                         offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 507                                         offset_y = current_row * decoration_height;
 508                                         current_row++;
 509                                         if ((current_row % wrap) == 0) {
 510                                                 current_col++;
 511                                                 current_row = 0;
 512                                         }
 513                                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 514                                         offset_x = current_col * wrap;
 515                                         offset_y = current_row * decoration_height;
 516                                         current_row++;
 517                                         if ((current_row % container->stack_limit_value) == 0) {
 518                                                 current_col++;
 519                                                 current_row = 0;
 520                                         }
 521                                 } else {
 522                                         offset_y = current_client * decoration_height;
 523                                 }
 524                                 current_client++;
 525                         } else if (container->mode == MODE_TABBED)
 526                                 offset_x = current_client++ * size_each;
 527                         decorate_window(conn, client, stack_win->pixmap.id, stack_win->pixmap.gc,
 528                                         offset_x, offset_y);
 529                 }
 530
 531                 /* Check if we need to fill one column because of an uneven
 532                  * amount of windows */
 533                 if (container->mode == MODE_STACK) {
 534                         if (container->stack_limit == STACK_LIMIT_COLS && (current_col % 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 * (stack_win->rect.width / container->stack_limit_value);
 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                         } else if (container->stack_limit == STACK_LIMIT_ROWS && (current_row % 2) != 0) {
 544                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 545
 546                                 int offset_x = current_col * wrap;
 547                                 int offset_y = current_row * decoration_height;
 548                                 xcb_rectangle_t rect = {offset_x, offset_y,
 549                                                         offset_x + container->width,
 550                                                         offset_y + decoration_height };
 551                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 552                         }
 553                 }
 554
 555                 xcb_copy_area(conn, stack_win->pixmap.id, stack_win->window, stack_win->pixmap.gc,
 556                               0, 0, 0, 0, stack_win->rect.width, stack_win->rect.height);
 557         }
 558 }
 559
 560 static void render_bars(xcb_connection_t *conn, Workspace *r_ws, int width, int *height) {
 561         Client *client;
 562         SLIST_FOREACH(client, &(r_ws->screen->dock_clients), dock_clients) {
 563                 LOG("client is at %d, should be at %d\n", client->rect.y, *height);
 564                 if (client->force_reconfigure |
 565                     update_if_necessary(&(client->rect.x), r_ws->rect.x) |
 566                     update_if_necessary(&(client->rect.y), *height))
 567                         reposition_client(conn, client);
 568
 569                 if (client->force_reconfigure |
 570                     update_if_necessary(&(client->rect.width), width) |
 571                     update_if_necessary(&(client->rect.height), client->desired_height))
 572                         resize_client(conn, client);
 573
 574                 client->force_reconfigure = false;
 575                 LOG("desired_height = %d\n", client->desired_height);
 576                 *height += client->desired_height;
 577         }
 578 }
 579
 580 static void render_internal_bar(xcb_connection_t *conn, Workspace *r_ws, int width, int height) {
 581         i3Font *font = load_font(conn, config.font);
 582         i3Screen *screen = r_ws->screen;
 583         enum { SET_NORMAL = 0, SET_FOCUSED = 1 };
 584
 585         /* Fill the whole bar in black */
 586         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 587         xcb_rectangle_t rect = {0, 0, width, height};
 588         xcb_poly_fill_rectangle(conn, screen->bar, screen->bargc, 1, &rect);
 589
 590         /* Set font */
 591         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FONT, font->id);
 592
 593         int drawn = 0;
 594         Workspace *ws;
 595         TAILQ_FOREACH(ws, workspaces, workspaces) {
 596                 if (ws->screen != screen)
 597                         continue;
 598
 599                 struct Colortriple *color;
 600
 601                 if (screen->current_workspace == ws)
 602                         color = &(config.bar.focused);
 603                 else if (ws->urgent)
 604                         color = &(config.bar.urgent);
 605                 else color = &(config.bar.unfocused);
 606
 607                 /* Draw the outer rect */
 608                 xcb_draw_rect(conn, screen->bar, screen->bargc, color->border,
 609                               drawn,              /* x */
 610                               1,                  /* y */
 611                               ws->text_width + 5 + 5, /* width = text width + 5 px left + 5px right */
 612                               height - 2          /* height = max. height - 1 px upper and 1 px bottom border */);
 613
 614                 /* Draw the background of this rect */
 615                 xcb_draw_rect(conn, screen->bar, screen->bargc, color->background,
 616                               drawn + 1,
 617                               2,
 618                               ws->text_width + 4 + 4,
 619                               height - 4);
 620
 621                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, color->text);
 622                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_BACKGROUND, color->background);
 623                 xcb_image_text_16(conn, ws->name_len, screen->bar, screen->bargc, drawn + 5 /* X */,
 624                                   font->height + 1 /* Y = baseline of font */,
 625                                   (xcb_char2b_t*)ws->name);
 626                 drawn += ws->text_width + 12;
 627         }
 628 }
 629
 630 /*
 631  * Modifies the event mask of all clients on the given workspace to either ignore or to handle
 632  * enter notifies. It is handy to ignore notifies because they will be sent when a window is mapped
 633  * under the cursor, thus when the user didn’t enter the window actively at all.
 634  *
 635  */
 636 void ignore_enter_notify_forall(xcb_connection_t *conn, Workspace *workspace, bool ignore_enter_notify) {
 637         Client *client;
 638         uint32_t values[1];
 639
 640         FOR_TABLE(workspace) {
 641                 if (workspace->table[cols][rows] == NULL)
 642                         continue;
 643
 644                 CIRCLEQ_FOREACH(client, &(workspace->table[cols][rows]->clients), clients) {
 645                         /* Change event mask for the decorations */
 646                         values[0] = FRAME_EVENT_MASK;
 647                         if (ignore_enter_notify)
 648                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 649                         xcb_change_window_attributes(conn, client->frame, XCB_CW_EVENT_MASK, values);
 650
 651                         /* Change event mask for the child itself */
 652                         values[0] = CHILD_EVENT_MASK;
 653                         if (ignore_enter_notify)
 654                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 655                         xcb_change_window_attributes(conn, client->child, XCB_CW_EVENT_MASK, values);
 656                 }
 657         }
 658 }
 659
 660 /*
 661  * Renders the given workspace on the given screen
 662  *
 663  */
 664 void render_workspace(xcb_connection_t *conn, i3Screen *screen, Workspace *r_ws) {
 665         i3Font *font = load_font(conn, config.font);
 666         int width = r_ws->rect.width;
 667         int height = r_ws->rect.height;
 668
 669         /* Reserve space for dock clients */
 670         Client *client;
 671         SLIST_FOREACH(client, &(screen->dock_clients), dock_clients)
 672                 height -= client->desired_height;
 673
 674         /* Space for the internal bar */
 675         height -= (font->height + 6);
 676
 677         int xoffset[r_ws->rows];
 678         int yoffset[r_ws->cols];
 679         /* Initialize offsets */
 680         for (int cols = 0; cols < r_ws->cols; cols++)
 681                 yoffset[cols] = r_ws->rect.y;
 682         for (int rows = 0; rows < r_ws->rows; rows++)
 683                 xoffset[rows] = r_ws->rect.x;
 684
 685         ignore_enter_notify_forall(conn, r_ws, true);
 686
 687         /* Go through the whole table and render what’s necessary */
 688         FOR_TABLE(r_ws) {
 689                 Container *container = r_ws->table[cols][rows];
 690                 if (container == NULL)
 691                         continue;
 692                 int single_width = -1, single_height = -1;
 693                 /* Update position of the container */
 694                 container->row = rows;
 695                 container->col = cols;
 696                 container->x = xoffset[rows];
 697                 container->y = yoffset[cols];
 698                 container->width = 0;
 699
 700                 for (int c = 0; c < container->colspan; c++) {
 701                         if (r_ws->width_factor[cols+c] == 0)
 702                                 container->width += (width / r_ws->cols);
 703                         else container->width += get_unoccupied_x(r_ws) * r_ws->width_factor[cols+c];
 704
 705                         if (single_width == -1)
 706                                 single_width = container->width;
 707                 }
 708
 709                 LOG("height is %d\n", height);
 710
 711                 container->height = 0;
 712
 713                 for (int c = 0; c < container->rowspan; c++) {
 714                         if (r_ws->height_factor[rows+c] == 0)
 715                                 container->height += (height / r_ws->rows);
 716                         else container->height += get_unoccupied_y(r_ws) * r_ws->height_factor[rows+c];
 717
 718                         if (single_height == -1)
 719                                 single_height = container->height;
 720                 }
 721
 722                 /* Render the container if it is not empty */
 723                 render_container(conn, container);
 724
 725                 xoffset[rows] += single_width;
 726                 yoffset[cols] += single_height;
 727         }
 728
 729         ignore_enter_notify_forall(conn, r_ws, false);
 730
 731         render_bars(conn, r_ws, width, &height);
 732         render_internal_bar(conn, r_ws, width, font->height + 6);
 733 }
 734
 735 /*
 736  * Renders the whole layout, that is: Go through each screen, each workspace, each container
 737  * and render each client. This also renders the bars.
 738  *
 739  * If you don’t need to render *everything*, you should call render_container on the container
 740  * you want to refresh.
 741  *
 742  */
 743 void render_layout(xcb_connection_t *conn) {
 744         i3Screen *screen;
 745
 746         if (virtual_screens == NULL)
 747                 return;
 748
 749         TAILQ_FOREACH(screen, virtual_screens, screens)
 750                 if (screen->current_workspace != NULL)
 751                         render_workspace(conn, screen, screen->current_workspace);
 752
 753         xcb_flush(conn);
 754 }