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 "randr.h"
  26 #include "layout.h"
  27 #include "client.h"
  28 #include "floating.h"
  29 #include "handlers.h"
  30 #include "workspace.h"
  31 #include "log.h"
  32 #include "container.h"
  33
  34 /*
  35  * Gets the unoccupied space (= space which is available for windows which were resized by the user)
  36  * for the given row. This is necessary to render both, customly resized windows and never touched
  37  * windows correctly, meaning that the aspect ratio will be maintained when opening new windows.
  38  *
  39  */
  40 int get_unoccupied_x(Workspace *workspace) {
  41         double unoccupied = workspace->rect.width;
  42         double default_factor = ((float)workspace->rect.width / workspace->cols) / workspace->rect.width;
  43
  44         DLOG("get_unoccupied_x(), starting with %f, default_factor = %f\n", unoccupied, default_factor);
  45
  46         for (int cols = 0; cols < workspace->cols; cols++) {
  47                 DLOG("width_factor[%d] = %f, unoccupied = %f\n", cols, workspace->width_factor[cols], unoccupied);
  48
  49                 if (workspace->width_factor[cols] == 0)
  50                         unoccupied -= workspace->rect.width * default_factor;
  51         }
  52
  53         DLOG("unoccupied space: %f\n", unoccupied);
  54         return unoccupied;
  55 }
  56
  57 /* See get_unoccupied_x() */
  58 int get_unoccupied_y(Workspace *workspace) {
  59         int height = workspace_height(workspace);
  60         double unoccupied = height;
  61         double default_factor = ((float)height / workspace->rows) / height;
  62
  63         DLOG("get_unoccupied_y(), starting with %f, default_factor = %f\n", unoccupied, default_factor);
  64
  65         for (int rows = 0; rows < workspace->rows; rows++) {
  66                 DLOG("height_factor[%d] = %f, unoccupied = %f\n", rows, workspace->height_factor[rows], unoccupied);
  67                 if (workspace->height_factor[rows] == 0)
  68                         unoccupied -= height * default_factor;
  69         }
  70
  71         DLOG("unoccupied space: %f\n", unoccupied);
  72         return unoccupied;
  73 }
  74
  75 /*
  76  * Redecorates the given client correctly by checking if it’s in a stacking container and
  77  * re-rendering the stack window or just calling decorate_window if it’s not in a stacking
  78  * container.
  79  *
  80  */
  81 void redecorate_window(xcb_connection_t *conn, Client *client) {
  82         if (client->container != NULL &&
  83             (client->container->mode == MODE_STACK ||
  84              client->container->mode == MODE_TABBED)) {
  85                 render_container(conn, client->container);
  86                 /* We clear the frame to generate exposure events, because the color used
  87                    in drawing may be different */
  88                 xcb_clear_area(conn, true, client->frame, 0, 0, client->rect.width, client->rect.height);
  89         } else decorate_window(conn, client, client->frame, client->titlegc, 0, 0);
  90         xcb_flush(conn);
  91 }
  92
  93 /*
  94  * (Re-)draws window decorations for a given Client onto the given drawable/graphic context.
  95  * When in stacking mode, the window decorations are drawn onto an own window.
  96  *
  97  */
  98 void decorate_window(xcb_connection_t *conn, Client *client, xcb_drawable_t drawable,
  99                      xcb_gcontext_t gc, int offset_x, int offset_y) {
 100         i3Font *font = load_font(conn, config.font);
 101         int decoration_height = font->height + 2 + 2;
 102         struct Colortriple *color;
 103         Client *last_focused;
 104
 105         /* Clients without a container (docks) won’t get decorated */
 106         if (client->dock)
 107                 return;
 108
 109         last_focused = SLIST_FIRST(&(client->workspace->focus_stack));
 110         /* Is the window urgent? */
 111         if (client->urgent)
 112                 color = &(config.client.urgent);
 113         else {
 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
 129         /* Our plan is the following:
 130            - Draw a rect around the whole client in color->background
 131            - Draw two lines in a lighter color
 132            - Draw the window’s title
 133          */
 134         int mode = container_mode(client->container, true);
 135
 136         /* Draw a rectangle in background color around the window */
 137         if (client->borderless && mode == MODE_DEFAULT)
 138                 xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 139         else xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, color->background);
 140
 141         /* In stacking mode, we only render the rect for this specific decoration */
 142         if (mode == MODE_STACK || mode == MODE_TABBED) {
 143                 /* We need to use the container’s width because it is the more recent value - when
 144                    in stacking mode, clients get reconfigured only on demand (the not active client
 145                    is not reconfigured), so the client’s rect.width would be wrong */
 146                 xcb_rectangle_t rect = {offset_x, offset_y,
 147                                         offset_x + client->container->width,
 148                                         offset_y + decoration_height };
 149                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 150         } else {
 151                 xcb_rectangle_t rect = {0, 0, client->rect.width, client->rect.height};
 152                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 153
 154                 /* Draw the inner background to have a black frame around clients (such as mplayer)
 155                    which cannot be resized exactly in our frames and therefore are centered */
 156                 xcb_change_gc_single(conn, client->titlegc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 157                 if (client->titlebar_position == TITLEBAR_OFF && client->borderless) {
 158                         xcb_rectangle_t crect = {0, 0, client->rect.width, client->rect.height};
 159                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 160                 } else if (client->titlebar_position == TITLEBAR_OFF && !client->borderless) {
 161                         xcb_rectangle_t crect = {1, 1, client->rect.width - (1 + 1), client->rect.height - (1 + 1)};
 162                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 163                 } else {
 164                         xcb_rectangle_t crect = {2, decoration_height,
 165                                                  client->rect.width - (2 + 2), client->rect.height - 2 - decoration_height};
 166                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 167                 }
 168         }
 169
 170         mode = container_mode(client->container, false);
 171
 172         if (client->titlebar_position != TITLEBAR_OFF) {
 173                 /* Draw the lines */
 174                 xcb_draw_line(conn, drawable, gc, color->border, offset_x, offset_y, offset_x + client->rect.width, offset_y);
 175                 xcb_draw_line(conn, drawable, gc, color->border,
 176                               offset_x + 2, /* x */
 177                               offset_y + font->height + 3, /* y */
 178                               offset_x + client->rect.width - 3, /* to_x */
 179                               offset_y + font->height + 3 /* to_y */);
 180         }
 181
 182         /* If the client has a title, we draw it */
 183         if (client->name != NULL &&
 184             (mode != MODE_DEFAULT || client->titlebar_position != TITLEBAR_OFF)) {
 185                 /* Draw the font */
 186                 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
 187                 uint32_t values[] = { color->text, color->background, font->id };
 188                 xcb_change_gc(conn, gc, mask, values);
 189
 190                 /* name_len == -1 means this is a legacy application which does not specify _NET_WM_NAME,
 191                    and we don’t handle the old window name (COMPOUND_TEXT) but only _NET_WM_NAME, which
 192                    is UTF-8 */
 193                 if (client->name_len == -1)
 194                         xcb_image_text_8(conn, strlen(client->name), drawable, gc, offset_x + 3 /* X */,
 195                                          offset_y + font->height /* Y = baseline of font */, client->name);
 196                 else
 197                         xcb_image_text_16(conn, client->name_len, drawable, gc, offset_x + 3 /* X */,
 198                                           offset_y + font->height /* Y = baseline of font */, (xcb_char2b_t*)client->name);
 199         }
 200 }
 201
 202 /*
 203  * Pushes the client’s x and y coordinates to X11
 204  *
 205  */
 206 void reposition_client(xcb_connection_t *conn, Client *client) {
 207         Output *output;
 208
 209         DLOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 210         /* Note: We can use a pointer to client->x like an array of uint32_ts
 211            because it is followed by client->y by definition */
 212         xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
 213
 214         if (!client_is_floating(client))
 215                 return;
 216
 217         /* If the client is floating, we need to check if we moved it to a different workspace */
 218         output = get_screen_containing(client->rect.x + (client->rect.width / 2),
 219                                        client->rect.y + (client->rect.height / 2));
 220         if (client->workspace->output == output)
 221                 return;
 222
 223         if (output == NULL) {
 224                 DLOG("Boundary checking disabled, no output found for (%d, %d)\n", client->rect.x, client->rect.y);
 225                 return;
 226         }
 227
 228         DLOG("Client is on workspace %p with output %p\n", client->workspace, client->workspace->output);
 229         DLOG("but output at %d, %d is %p\n", client->rect.x, client->rect.y, output);
 230         floating_assign_to_workspace(client, output->current_workspace);
 231
 232         set_focus(conn, client, true);
 233 }
 234
 235 /*
 236  * Pushes the client’s width/height to X11 and resizes the child window. This
 237  * function also updates the client’s position, so if you work on tiling clients
 238  * only, you can use this function instead of separate calls to reposition_client
 239  * and resize_client to reduce flickering.
 240  *
 241  */
 242 void resize_client(xcb_connection_t *conn, Client *client) {
 243         i3Font *font = load_font(conn, config.font);
 244
 245         DLOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 246         DLOG("resizing client 0x%08x to %d x %d\n", client->frame, client->rect.width, client->rect.height);
 247         xcb_set_window_rect(conn, client->frame, client->rect);
 248
 249         /* Adjust the position of the child inside its frame.
 250          * The coordinates of the child are relative to its frame, we
 251          * add a border of 2 pixel to each value */
 252         Rect *rect = &(client->child_rect);
 253         switch (container_mode(client->container, true)) {
 254                 case MODE_STACK:
 255                 case MODE_TABBED:
 256                         rect->x = 2;
 257                         rect->y = 0;
 258                         rect->width = client->rect.width - (2 + 2);
 259                         rect->height = client->rect.height - 2;
 260                         break;
 261                 default:
 262                         if (client->titlebar_position == TITLEBAR_OFF && client->borderless) {
 263                                 rect->x = 0;
 264                                 rect->y = 0;
 265                                 rect->width = client->rect.width;
 266                                 rect->height = client->rect.height;
 267                         } else if (client->titlebar_position == TITLEBAR_OFF && !client->borderless) {
 268                                 rect->x = 1;
 269                                 rect->y = 1;
 270                                 rect->width = client->rect.width - 1 - 1;
 271                                 rect->height = client->rect.height - 1 - 1;
 272                         } else {
 273                                 rect->x = 2;
 274                                 rect->y = font->height + 2 + 2;
 275                                 rect->width = client->rect.width - (2 + 2);
 276                                 rect->height = client->rect.height - ((font->height + 2 + 2) + 2);
 277                         }
 278                         break;
 279         }
 280
 281         rect->width -= (2 * client->border_width);
 282         rect->height -= (2 * client->border_width);
 283
 284         /* Obey the ratio, if any */
 285         if (client->proportional_height != 0 &&
 286             client->proportional_width != 0) {
 287                 DLOG("proportional height = %d, width = %d\n", client->proportional_height, client->proportional_width);
 288                 double new_height = rect->height + 1;
 289                 int new_width = rect->width;
 290
 291                 while (new_height > rect->height) {
 292                         new_height = ((double)client->proportional_height / client->proportional_width) * new_width;
 293
 294                         if (new_height > rect->height)
 295                                 new_width--;
 296                 }
 297                 /* Center the window */
 298                 rect->y += ceil(rect->height / 2) - floor(new_height / 2);
 299                 rect->x += ceil(rect->width / 2) - floor(new_width / 2);
 300
 301                 rect->height = new_height;
 302                 rect->width = new_width;
 303                 DLOG("new_height = %f, new_width = %d\n", new_height, new_width);
 304         }
 305
 306         if (client->height_increment > 1) {
 307                 int old_height = rect->height;
 308                 rect->height -= (rect->height - client->base_height) % client->height_increment;
 309                 DLOG("Lost %d pixel due to client's height_increment (%d px, base_height = %d)\n",
 310                     old_height - rect->height, client->height_increment, client->base_height);
 311         }
 312
 313         if (client->width_increment > 1) {
 314                 int old_width = rect->width;
 315                 rect->width -= (rect->width - client->base_width) % client->width_increment;
 316                 DLOG("Lost %d pixel due to client's width_increment (%d px, base_width = %d)\n",
 317                     old_width - rect->width, client->width_increment, client->base_width);
 318         }
 319
 320         DLOG("child will be at %dx%d with size %dx%d\n", rect->x, rect->y, rect->width, rect->height);
 321
 322         xcb_set_window_rect(conn, client->child, *rect);
 323
 324         /* After configuring a child window we need to fake a configure_notify_event (see ICCCM 4.2.3).
 325          * This is necessary to inform the client of its position relative to the root window,
 326          * not relative to its frame (as done in the configure_notify_event by the x server). */
 327         fake_absolute_configure_notify(conn, client);
 328
 329         /* Force redrawing after resizing the window because any now lost
 330          * pixels could contain old garbage. */
 331         xcb_expose_event_t generated;
 332         generated.window = client->frame;
 333         generated.count = 0;
 334         handle_expose_event(NULL, conn, &generated);
 335 }
 336
 337 /*
 338  * Renders the given container. Is called by render_layout() or individually (for example
 339  * when focus changes in a stacking container)
 340  *
 341  */
 342 void render_container(xcb_connection_t *conn, Container *container) {
 343         Client *client;
 344         int num_clients = 0, current_client = 0;
 345
 346         CIRCLEQ_FOREACH(client, &(container->clients), clients)
 347                 num_clients++;
 348
 349         if (container->mode == MODE_DEFAULT) {
 350                 int height = (container->height / max(1, num_clients));
 351                 int rest_pixels = (container->height % max(1, num_clients));
 352                 DLOG("height per client = %d, rest = %d\n", height, rest_pixels);
 353
 354                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 355                         /* If the client is in fullscreen mode, it does not get reconfigured */
 356                         if (container->workspace->fullscreen_client == client) {
 357                                 current_client++;
 358                                 continue;
 359                         }
 360
 361                         /* If we have some pixels left to distribute, add one
 362                          * pixel to each client as long as possible. */
 363                         int this_height = height;
 364                         if (rest_pixels > 0) {
 365                                 height++;
 366                                 rest_pixels--;
 367                         }
 368                         /* Check if we changed client->x or client->y by updating it.
 369                          * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 370                         if (client->force_reconfigure |
 371                             update_if_necessary(&(client->rect.x), container->x) |
 372                             update_if_necessary(&(client->rect.y), container->y +
 373                                         (container->height / num_clients) * current_client) |
 374                             update_if_necessary(&(client->rect.width), container->width) |
 375                             update_if_necessary(&(client->rect.height), this_height))
 376                                 resize_client(conn, client);
 377
 378                         /* TODO: vertical default layout */
 379
 380                         client->force_reconfigure = false;
 381
 382                         current_client++;
 383                 }
 384         } else {
 385                 i3Font *font = load_font(conn, config.font);
 386                 int decoration_height = (font->height + 2 + 2);
 387                 struct Stack_Window *stack_win = &(container->stack_win);
 388                 /* The size for each tab (width), necessary as a separate variable
 389                  * because num_clients gets fixed to 1 in tabbed mode. */
 390                 int size_each = (num_clients == 0 ? container->width : container->width / num_clients);
 391                 int stack_lines = num_clients;
 392
 393                 /* Check if we need to remap our stack title window, it gets unmapped when the container
 394                    is empty in src/handlers.c:unmap_notify() */
 395                 if (stack_win->rect.height == 0 && num_clients > 1) {
 396                         DLOG("remapping stack win\n");
 397                         xcb_map_window(conn, stack_win->window);
 398                 } else DLOG("not remapping stackwin, height = %d, num_clients = %d\n",
 399                                 stack_win->rect.height, num_clients);
 400
 401                 if (container->mode == MODE_TABBED) {
 402                         /* By setting num_clients to 1 we force that the stack window will be only one line
 403                          * high. The rest of the code is useful in both cases. */
 404                         DLOG("tabbed mode, setting num_clients = 1\n");
 405                         if (stack_lines > 1)
 406                                 stack_lines = 1;
 407                 }
 408
 409                 if (container->stack_limit == STACK_LIMIT_COLS) {
 410                         stack_lines = ceil((float)num_clients / container->stack_limit_value);
 411                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 412                         stack_lines = min(num_clients, container->stack_limit_value);
 413                 }
 414
 415                 int height = decoration_height * stack_lines;
 416                 if (num_clients == 1) {
 417                         height = 0;
 418                         stack_win->rect.height = 0;
 419                         xcb_unmap_window(conn, stack_win->window);
 420
 421                         DLOG("Just one client, setting height to %d\n", height);
 422                 }
 423
 424                 /* Check if we need to reconfigure our stack title window */
 425                 if (height > 0 && (
 426                      update_if_necessary(&(stack_win->rect.x), container->x) |
 427                      update_if_necessary(&(stack_win->rect.y), container->y) |
 428                      update_if_necessary(&(stack_win->rect.width), container->width) |
 429                      update_if_necessary(&(stack_win->rect.height), height))) {
 430
 431                         /* Configuration can happen in two slightly different ways:
 432
 433                            If there is no client in fullscreen mode, 5 parameters are passed
 434                            (x, y, width, height, stack mode is set to above which means top-most position).
 435
 436                            If there is a fullscreen client, the fourth parameter is set to to the
 437                            fullscreen window as sibling and the stack mode is set to below, which means
 438                            that the stack_window will be placed just below the sibling, that is, under
 439                            the fullscreen window.
 440                          */
 441                         uint32_t values[] = { stack_win->rect.x, stack_win->rect.y,
 442                                               stack_win->rect.width, stack_win->rect.height,
 443                                               XCB_STACK_MODE_ABOVE, XCB_STACK_MODE_BELOW };
 444                         uint32_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
 445                                         XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT |
 446                                         XCB_CONFIG_WINDOW_STACK_MODE;
 447
 448                         /* Raise the stack window, but keep it below the first floating client
 449                          * and below the fullscreen client (if any) */
 450                         Client *first_floating = TAILQ_FIRST(&(container->workspace->floating_clients));
 451                         if (first_floating != TAILQ_END(&(container->workspace->floating_clients))) {
 452                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 453                                 values[4] = first_floating->frame;
 454                         } else if (container->workspace->fullscreen_client != NULL) {
 455                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 456                                 values[4] = container->workspace->fullscreen_client->frame;
 457                         }
 458
 459                         xcb_configure_window(conn, stack_win->window, mask, values);
 460                 }
 461
 462                 /* Prepare the pixmap for usage */
 463                 cached_pixmap_prepare(conn, &(stack_win->pixmap));
 464
 465                 int current_row = 0, current_col = 0;
 466                 int wrap = 0;
 467
 468                 if (container->stack_limit == STACK_LIMIT_COLS) {
 469                         /* wrap stores the number of rows after which we will
 470                          * wrap to a new column. */
 471                         wrap = ceil((float)num_clients / container->stack_limit_value);
 472                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 473                         /* When limiting rows, the wrap variable serves a
 474                          * slightly different purpose: it holds the number of
 475                          * pixels which each client will get. This is constant
 476                          * during the following loop, so it saves us some
 477                          * divisions and ceil()ing. */
 478                         wrap = (stack_win->rect.width / ceil((float)num_clients / container->stack_limit_value));
 479                 }
 480
 481                 /* Render the decorations of all clients */
 482                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 483                         /* If the client is in fullscreen mode, it does not get reconfigured */
 484                         if (container->workspace->fullscreen_client == client) {
 485                                 current_client++;
 486                                 continue;
 487                         }
 488
 489                         /* Check if we changed client->x or client->y by updating it.
 490                          * Note the bitwise OR instead of logical OR to force evaluation of all statements */
 491                         if (client->force_reconfigure |
 492                             update_if_necessary(&(client->rect.x), container->x) |
 493                             update_if_necessary(&(client->rect.y), container->y + height) |
 494                             update_if_necessary(&(client->rect.width), container->width) |
 495                             update_if_necessary(&(client->rect.height), container->height - height))
 496                                 resize_client(conn, client);
 497
 498                         client->force_reconfigure = false;
 499
 500                         int offset_x = 0;
 501                         int offset_y = 0;
 502                         if (container->mode == MODE_STACK ||
 503                             (container->mode == MODE_TABBED &&
 504                              container->stack_limit == STACK_LIMIT_COLS)) {
 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                                 if (container->stack_limit == STACK_LIMIT_ROWS) {
 527                                         LOG("You limited a tabbed container in its rows. "
 528                                             "This makes no sense in tabbing mode.\n");
 529                                 }
 530                                 offset_x = current_client++ * size_each;
 531                         }
 532                         decorate_window(conn, client, stack_win->pixmap.id, stack_win->pixmap.gc,
 533                                         offset_x, offset_y);
 534                 }
 535
 536                 /* Check if we need to fill one column because of an uneven
 537                  * amount of windows */
 538                 if (container->mode == MODE_STACK) {
 539                         if (container->stack_limit == STACK_LIMIT_COLS && (current_col % 2) != 0) {
 540                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 541
 542                                 int offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 543                                 int offset_y = current_row * decoration_height;
 544                                 xcb_rectangle_t rect = {offset_x, offset_y,
 545                                                         offset_x + container->width,
 546                                                         offset_y + decoration_height };
 547                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 548                         } else if (container->stack_limit == STACK_LIMIT_ROWS && (current_row % 2) != 0) {
 549                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 550
 551                                 int offset_x = current_col * wrap;
 552                                 int offset_y = current_row * decoration_height;
 553                                 xcb_rectangle_t rect = {offset_x, offset_y,
 554                                                         offset_x + container->width,
 555                                                         offset_y + decoration_height };
 556                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 557                         }
 558                 }
 559
 560                 xcb_copy_area(conn, stack_win->pixmap.id, stack_win->window, stack_win->pixmap.gc,
 561                               0, 0, 0, 0, stack_win->rect.width, stack_win->rect.height);
 562         }
 563 }
 564
 565 static void render_bars(xcb_connection_t *conn, Workspace *r_ws, int width, int *height) {
 566         Client *client;
 567         SLIST_FOREACH(client, &(r_ws->output->dock_clients), dock_clients) {
 568                 DLOG("client is at %d, should be at %d\n", client->rect.y, *height);
 569                 if (client->force_reconfigure |
 570                     update_if_necessary(&(client->rect.x), r_ws->rect.x) |
 571                     update_if_necessary(&(client->rect.y), *height))
 572                         reposition_client(conn, client);
 573
 574                 if (client->force_reconfigure |
 575                     update_if_necessary(&(client->rect.width), width) |
 576                     update_if_necessary(&(client->rect.height), client->desired_height))
 577                         resize_client(conn, client);
 578
 579                 client->force_reconfigure = false;
 580                 DLOG("desired_height = %d\n", client->desired_height);
 581                 *height += client->desired_height;
 582         }
 583 }
 584
 585 static void render_internal_bar(xcb_connection_t *conn, Workspace *r_ws, int width, int height) {
 586         i3Font *font = load_font(conn, config.font);
 587         Output *output = r_ws->output;
 588         enum { SET_NORMAL = 0, SET_FOCUSED = 1 };
 589
 590         /* Fill the whole bar in black */
 591         xcb_change_gc_single(conn, output->bargc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 592         xcb_rectangle_t rect = {0, 0, width, height};
 593         xcb_poly_fill_rectangle(conn, output->bar, output->bargc, 1, &rect);
 594
 595         /* Set font */
 596         xcb_change_gc_single(conn, output->bargc, XCB_GC_FONT, font->id);
 597
 598         int drawn = 0;
 599         Workspace *ws;
 600         TAILQ_FOREACH(ws, workspaces, workspaces) {
 601                 if (ws->output != output)
 602                         continue;
 603
 604                 struct Colortriple *color;
 605
 606                 if (output->current_workspace == ws)
 607                         color = &(config.bar.focused);
 608                 else if (ws->urgent)
 609                         color = &(config.bar.urgent);
 610                 else color = &(config.bar.unfocused);
 611
 612                 /* Draw the outer rect */
 613                 xcb_draw_rect(conn, output->bar, output->bargc, color->border,
 614                               drawn,              /* x */
 615                               1,                  /* y */
 616                               ws->text_width + 5 + 5, /* width = text width + 5 px left + 5px right */
 617                               height - 2          /* height = max. height - 1 px upper and 1 px bottom border */);
 618
 619                 /* Draw the background of this rect */
 620                 xcb_draw_rect(conn, output->bar, output->bargc, color->background,
 621                               drawn + 1,
 622                               2,
 623                               ws->text_width + 4 + 4,
 624                               height - 4);
 625
 626                 xcb_change_gc_single(conn, output->bargc, XCB_GC_FOREGROUND, color->text);
 627                 xcb_change_gc_single(conn, output->bargc, XCB_GC_BACKGROUND, color->background);
 628                 xcb_image_text_16(conn, ws->name_len, output->bar, output->bargc, drawn + 5 /* X */,
 629                                   font->height + 1 /* Y = baseline of font */,
 630                                   (xcb_char2b_t*)ws->name);
 631                 drawn += ws->text_width + 12;
 632         }
 633 }
 634
 635 /*
 636  * Modifies the event mask of all clients on the given workspace to either ignore or to handle
 637  * enter notifies. It is handy to ignore notifies because they will be sent when a window is mapped
 638  * under the cursor, thus when the user didn’t enter the window actively at all.
 639  *
 640  */
 641 void ignore_enter_notify_forall(xcb_connection_t *conn, Workspace *workspace, bool ignore_enter_notify) {
 642         Client *client;
 643         uint32_t values[1];
 644
 645         FOR_TABLE(workspace) {
 646                 if (workspace->table[cols][rows] == NULL)
 647                         continue;
 648
 649                 CIRCLEQ_FOREACH(client, &(workspace->table[cols][rows]->clients), clients) {
 650                         /* Change event mask for the decorations */
 651                         values[0] = FRAME_EVENT_MASK;
 652                         if (ignore_enter_notify)
 653                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 654                         xcb_change_window_attributes(conn, client->frame, XCB_CW_EVENT_MASK, values);
 655
 656                         /* Change event mask for the child itself */
 657                         values[0] = CHILD_EVENT_MASK;
 658                         if (ignore_enter_notify)
 659                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 660                         xcb_change_window_attributes(conn, client->child, XCB_CW_EVENT_MASK, values);
 661                 }
 662         }
 663 }
 664
 665 /*
 666  * Renders the given workspace on the given screen
 667  *
 668  */
 669 void render_workspace(xcb_connection_t *conn, Output *output, Workspace *r_ws) {
 670         i3Font *font = load_font(conn, config.font);
 671         int width = r_ws->rect.width;
 672         int height = r_ws->rect.height;
 673
 674         /* Reserve space for dock clients */
 675         Client *client;
 676         SLIST_FOREACH(client, &(output->dock_clients), dock_clients)
 677                 height -= client->desired_height;
 678
 679         /* Space for the internal bar */
 680         height -= (font->height + 6);
 681
 682         int xoffset[r_ws->rows];
 683         int yoffset[r_ws->cols];
 684         /* Initialize offsets */
 685         for (int cols = 0; cols < r_ws->cols; cols++)
 686                 yoffset[cols] = r_ws->rect.y;
 687         for (int rows = 0; rows < r_ws->rows; rows++)
 688                 xoffset[rows] = r_ws->rect.x;
 689
 690         ignore_enter_notify_forall(conn, r_ws, true);
 691
 692         /* Go through the whole table and render what’s necessary */
 693         FOR_TABLE(r_ws) {
 694                 Container *container = r_ws->table[cols][rows];
 695                 if (container == NULL)
 696                         continue;
 697                 int single_width = -1, single_height = -1;
 698                 /* Update position of the container */
 699                 container->row = rows;
 700                 container->col = cols;
 701                 container->x = xoffset[rows];
 702                 container->y = yoffset[cols];
 703                 container->width = 0;
 704
 705                 for (int c = 0; c < container->colspan; c++) {
 706                         if (r_ws->width_factor[cols+c] == 0)
 707                                 container->width += (width / r_ws->cols);
 708                         else container->width += get_unoccupied_x(r_ws) * r_ws->width_factor[cols+c];
 709
 710                         if (single_width == -1)
 711                                 single_width = container->width;
 712                 }
 713
 714                 DLOG("height is %d\n", height);
 715
 716                 container->height = 0;
 717
 718                 for (int c = 0; c < container->rowspan; c++) {
 719                         if (r_ws->height_factor[rows+c] == 0)
 720                                 container->height += (height / r_ws->rows);
 721                         else container->height += get_unoccupied_y(r_ws) * r_ws->height_factor[rows+c];
 722
 723                         if (single_height == -1)
 724                                 single_height = container->height;
 725                 }
 726
 727                 /* Render the container if it is not empty */
 728                 render_container(conn, container);
 729
 730                 xoffset[rows] += single_width;
 731                 yoffset[cols] += single_height;
 732         }
 733
 734         ignore_enter_notify_forall(conn, r_ws, false);
 735
 736         render_bars(conn, r_ws, width, &height);
 737         render_internal_bar(conn, r_ws, width, font->height + 6);
 738 }
 739
 740 /*
 741  * Renders the whole layout, that is: Go through each screen, each workspace, each container
 742  * and render each client. This also renders the bars.
 743  *
 744  * If you don’t need to render *everything*, you should call render_container on the container
 745  * you want to refresh.
 746  *
 747  */
 748 void render_layout(xcb_connection_t *conn) {
 749         Output *output;
 750
 751         TAILQ_FOREACH(output, &outputs, outputs)
 752                 if (output->current_workspace != NULL)
 753                         render_workspace(conn, output, output->current_workspace);
 754
 755         xcb_flush(conn);
 756 }