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 #include "log.h"
  32 #include "container.h"
  33
  34 /*
  35  * Updates *destination with new_value and returns true if it was changed or false
  36  * if it was the same
  37  *
  38  */
  39 static bool update_if_necessary(uint32_t *destination, const uint32_t new_value) {
  40         uint32_t old_value = *destination;
  41
  42         return ((*destination = new_value) != old_value);
  43 }
  44
  45 /*
  46  * Gets the unoccupied space (= space which is available for windows which were resized by the user)
  47  * for the given row. This is necessary to render both, customly resized windows and never touched
  48  * windows correctly, meaning that the aspect ratio will be maintained when opening new windows.
  49  *
  50  */
  51 int get_unoccupied_x(Workspace *workspace) {
  52         double unoccupied = workspace->rect.width;
  53         double default_factor = ((float)workspace->rect.width / workspace->cols) / workspace->rect.width;
  54
  55         DLOG("get_unoccupied_x(), starting with %f, default_factor = %f\n", unoccupied, default_factor);
  56
  57         for (int cols = 0; cols < workspace->cols; cols++) {
  58                 DLOG("width_factor[%d] = %f, unoccupied = %f\n", cols, workspace->width_factor[cols], unoccupied);
  59
  60                 if (workspace->width_factor[cols] == 0)
  61                         unoccupied -= workspace->rect.width * default_factor;
  62         }
  63
  64         DLOG("unoccupied space: %f\n", unoccupied);
  65         return unoccupied;
  66 }
  67
  68 /* See get_unoccupied_x() */
  69 int get_unoccupied_y(Workspace *workspace) {
  70         int height = workspace_height(workspace);
  71         double unoccupied = height;
  72         double default_factor = ((float)height / workspace->rows) / height;
  73
  74         DLOG("get_unoccupied_y(), starting with %f, default_factor = %f\n", unoccupied, default_factor);
  75
  76         for (int rows = 0; rows < workspace->rows; rows++) {
  77                 DLOG("height_factor[%d] = %f, unoccupied = %f\n", rows, workspace->height_factor[rows], unoccupied);
  78                 if (workspace->height_factor[rows] == 0)
  79                         unoccupied -= height * default_factor;
  80         }
  81
  82         DLOG("unoccupied space: %f\n", unoccupied);
  83         return unoccupied;
  84 }
  85
  86 /*
  87  * Redecorates the given client correctly by checking if it’s in a stacking container and
  88  * re-rendering the stack window or just calling decorate_window if it’s not in a stacking
  89  * container.
  90  *
  91  */
  92 void redecorate_window(xcb_connection_t *conn, Client *client) {
  93         if (client->container != NULL &&
  94             (client->container->mode == MODE_STACK ||
  95              client->container->mode == MODE_TABBED)) {
  96                 render_container(conn, client->container);
  97                 /* We clear the frame to generate exposure events, because the color used
  98                    in drawing may be different */
  99                 xcb_clear_area(conn, true, client->frame, 0, 0, client->rect.width, client->rect.height);
 100         } else decorate_window(conn, client, client->frame, client->titlegc, 0, 0);
 101         xcb_flush(conn);
 102 }
 103
 104 /*
 105  * (Re-)draws window decorations for a given Client onto the given drawable/graphic context.
 106  * When in stacking mode, the window decorations are drawn onto an own window.
 107  *
 108  */
 109 void decorate_window(xcb_connection_t *conn, Client *client, xcb_drawable_t drawable,
 110                      xcb_gcontext_t gc, int offset_x, int offset_y) {
 111         i3Font *font = load_font(conn, config.font);
 112         int decoration_height = font->height + 2 + 2;
 113         struct Colortriple *color;
 114         Client *last_focused;
 115
 116         /* Clients without a container (docks) won’t get decorated */
 117         if (client->dock)
 118                 return;
 119
 120         last_focused = SLIST_FIRST(&(client->workspace->focus_stack));
 121         /* Is the window urgent? */
 122         if (client->urgent)
 123                 color = &(config.client.urgent);
 124         else {
 125                 if (client_is_floating(client)) {
 126                         if (last_focused == client)
 127                                 color = &(config.client.focused);
 128                         else color = &(config.client.unfocused);
 129                 } else {
 130                         if (client->container->currently_focused == client) {
 131                                 /* Distinguish if the window is currently focused… */
 132                                 if (last_focused == client && c_ws == client->workspace)
 133                                         color = &(config.client.focused);
 134                                 /* …or if it is the focused window in a not focused container */
 135                                 else color = &(config.client.focused_inactive);
 136                         } else color = &(config.client.unfocused);
 137                 }
 138         }
 139
 140         /* Our plan is the following:
 141            - Draw a rect around the whole client in color->background
 142            - Draw two lines in a lighter color
 143            - Draw the window’s title
 144          */
 145         int mode = container_mode(client->container, true);
 146
 147         /* Draw a rectangle in background color around the window */
 148         if (client->borderless && mode == MODE_DEFAULT)
 149                 xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 150         else xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, color->background);
 151
 152         /* In stacking mode, we only render the rect for this specific decoration */
 153         if (mode == MODE_STACK || mode == MODE_TABBED) {
 154                 /* We need to use the container’s width because it is the more recent value - when
 155                    in stacking mode, clients get reconfigured only on demand (the not active client
 156                    is not reconfigured), so the client’s rect.width would be wrong */
 157                 xcb_rectangle_t rect = {offset_x, offset_y,
 158                                         offset_x + client->container->width,
 159                                         offset_y + decoration_height };
 160                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 161         } else {
 162                 xcb_rectangle_t rect = {0, 0, client->rect.width, client->rect.height};
 163                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 164
 165                 /* Draw the inner background to have a black frame around clients (such as mplayer)
 166                    which cannot be resized exactly in our frames and therefore are centered */
 167                 xcb_change_gc_single(conn, client->titlegc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 168                 if (client->titlebar_position == TITLEBAR_OFF && client->borderless) {
 169                         xcb_rectangle_t crect = {0, 0, client->rect.width, client->rect.height};
 170                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 171                 } else if (client->titlebar_position == TITLEBAR_OFF && !client->borderless) {
 172                         xcb_rectangle_t crect = {1, 1, client->rect.width - (1 + 1), client->rect.height - (1 + 1)};
 173                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 174                 } else {
 175                         xcb_rectangle_t crect = {2, decoration_height,
 176                                                  client->rect.width - (2 + 2), client->rect.height - 2 - decoration_height};
 177                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 178                 }
 179         }
 180
 181         mode = container_mode(client->container, false);
 182
 183         if (client->titlebar_position != TITLEBAR_OFF) {
 184                 /* Draw the lines */
 185                 xcb_draw_line(conn, drawable, gc, color->border, offset_x, offset_y, offset_x + client->rect.width, offset_y);
 186                 if (mode == MODE_DEFAULT ||
 187                     CIRCLEQ_NEXT_OR_NULL(&(client->container->clients), client, clients) == NULL)
 188                         xcb_draw_line(conn, drawable, gc, color->border,
 189                                       offset_x + 2, /* x */
 190                                       offset_y + font->height + 3, /* y */
 191                                       offset_x + client->rect.width - 3, /* to_x */
 192                                       offset_y + font->height + 3 /* to_y */);
 193         }
 194
 195         /* If the client has a title, we draw it */
 196         if (client->name != NULL &&
 197             (mode != MODE_DEFAULT || client->titlebar_position != TITLEBAR_OFF)) {
 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         DLOG("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                 DLOG("Boundary checking disabled, no screen found for (%d, %d)\n", client->rect.x, client->rect.y);
 236                 return;
 237         }
 238
 239         DLOG("Client is on workspace %p with screen %p\n", client->workspace, client->workspace->screen);
 240         DLOG("but screen at %d, %d is %p\n", client->rect.x, client->rect.y, screen);
 241         floating_assign_to_workspace(client, 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         DLOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 255         DLOG("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 (container_mode(client->container, true)) {
 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                 DLOG("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                 DLOG("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                 DLOG("Lost %d pixel due to client's height_increment (%d px, base_height = %d)\n",
 328                     old_height - rect->height, client->height_increment, client->base_height);
 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                 DLOG("Lost %d pixel due to client's width_increment (%d px, base_width = %d)\n",
 335                     old_width - rect->width, client->width_increment, client->base_width);
 336         }
 337
 338         DLOG("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                 int height = (container->height / max(1, num_clients));
 369                 int rest_pixels = (container->height % max(1, num_clients));
 370                 DLOG("height per client = %d, rest = %d\n", height, rest_pixels);
 371
 372                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 373                         /* If the client is in fullscreen mode, it does not get reconfigured */
 374                         if (container->workspace->fullscreen_client == client) {
 375                                 current_client++;
 376                                 continue;
 377                         }
 378
 379                         /* If we have some pixels left to distribute, add one
 380                          * pixel to each client as long as possible. */
 381                         int this_height = height;
 382                         if (rest_pixels > 0) {
 383                                 height++;
 384                                 rest_pixels--;
 385                         }
 386                         /* Check if we changed client->x or client->y by updating it.
 387                          * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 388                         if (client->force_reconfigure |
 389                             update_if_necessary(&(client->rect.x), container->x) |
 390                             update_if_necessary(&(client->rect.y), container->y +
 391                                         (container->height / num_clients) * current_client) |
 392                             update_if_necessary(&(client->rect.width), container->width) |
 393                             update_if_necessary(&(client->rect.height), this_height))
 394                                 resize_client(conn, client);
 395
 396                         /* TODO: vertical default layout */
 397
 398                         client->force_reconfigure = false;
 399
 400                         current_client++;
 401                 }
 402         } else {
 403                 i3Font *font = load_font(conn, config.font);
 404                 int decoration_height = (font->height + 2 + 2);
 405                 struct Stack_Window *stack_win = &(container->stack_win);
 406                 /* The size for each tab (width), necessary as a separate variable
 407                  * because num_clients gets fixed to 1 in tabbed mode. */
 408                 int size_each = (num_clients == 0 ? container->width : container->width / num_clients);
 409                 int stack_lines = num_clients;
 410
 411                 /* Check if we need to remap our stack title window, it gets unmapped when the container
 412                    is empty in src/handlers.c:unmap_notify() */
 413                 if (stack_win->rect.height == 0 && num_clients > 1) {
 414                         DLOG("remapping stack win\n");
 415                         xcb_map_window(conn, stack_win->window);
 416                 } else DLOG("not remapping stackwin, height = %d, num_clients = %d\n",
 417                                 stack_win->rect.height, num_clients);
 418
 419                 if (container->mode == MODE_TABBED) {
 420                         /* By setting num_clients to 1 we force that the stack window will be only one line
 421                          * high. The rest of the code is useful in both cases. */
 422                         DLOG("tabbed mode, setting num_clients = 1\n");
 423                         if (stack_lines > 1)
 424                                 stack_lines = 1;
 425                 }
 426
 427                 if (container->stack_limit == STACK_LIMIT_COLS) {
 428                         stack_lines = ceil((float)num_clients / container->stack_limit_value);
 429                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 430                         stack_lines = min(num_clients, container->stack_limit_value);
 431                 }
 432
 433                 int height = decoration_height * stack_lines;
 434                 if (num_clients == 1) {
 435                         height = 0;
 436                         stack_win->rect.height = 0;
 437                         xcb_unmap_window(conn, stack_win->window);
 438
 439                         DLOG("Just one client, setting height to %d\n", height);
 440                 }
 441
 442                 /* Check if we need to reconfigure our stack title window */
 443                 if (height > 0 && (
 444                      update_if_necessary(&(stack_win->rect.x), container->x) |
 445                      update_if_necessary(&(stack_win->rect.y), container->y) |
 446                      update_if_necessary(&(stack_win->rect.width), container->width) |
 447                      update_if_necessary(&(stack_win->rect.height), height))) {
 448
 449                         /* Configuration can happen in two slightly different ways:
 450
 451                            If there is no client in fullscreen mode, 5 parameters are passed
 452                            (x, y, width, height, stack mode is set to above which means top-most position).
 453
 454                            If there is a fullscreen client, the fourth parameter is set to to the
 455                            fullscreen window as sibling and the stack mode is set to below, which means
 456                            that the stack_window will be placed just below the sibling, that is, under
 457                            the fullscreen window.
 458                          */
 459                         uint32_t values[] = { stack_win->rect.x, stack_win->rect.y,
 460                                               stack_win->rect.width, stack_win->rect.height,
 461                                               XCB_STACK_MODE_ABOVE, XCB_STACK_MODE_BELOW };
 462                         uint32_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
 463                                         XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT |
 464                                         XCB_CONFIG_WINDOW_STACK_MODE;
 465
 466                         /* Raise the stack window, but keep it below the first floating client
 467                          * and below the fullscreen client (if any) */
 468                         Client *first_floating = TAILQ_FIRST(&(container->workspace->floating_clients));
 469                         if (first_floating != TAILQ_END(&(container->workspace->floating_clients))) {
 470                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 471                                 values[4] = first_floating->frame;
 472                         } else if (container->workspace->fullscreen_client != NULL) {
 473                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 474                                 values[4] = container->workspace->fullscreen_client->frame;
 475                         }
 476
 477                         xcb_configure_window(conn, stack_win->window, mask, values);
 478                 }
 479
 480                 /* Prepare the pixmap for usage */
 481                 cached_pixmap_prepare(conn, &(stack_win->pixmap));
 482
 483                 int current_row = 0, current_col = 0;
 484                 int wrap = 0;
 485
 486                 if (container->stack_limit == STACK_LIMIT_COLS) {
 487                         /* wrap stores the number of rows after which we will
 488                          * wrap to a new column. */
 489                         wrap = ceil((float)num_clients / container->stack_limit_value);
 490                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 491                         /* When limiting rows, the wrap variable serves a
 492                          * slightly different purpose: it holds the number of
 493                          * pixels which each client will get. This is constant
 494                          * during the following loop, so it saves us some
 495                          * divisions and ceil()ing. */
 496                         wrap = (stack_win->rect.width / ceil((float)num_clients / container->stack_limit_value));
 497                 }
 498
 499                 /* Render the decorations of all clients */
 500                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 501                         /* If the client is in fullscreen mode, it does not get reconfigured */
 502                         if (container->workspace->fullscreen_client == client) {
 503                                 current_client++;
 504                                 continue;
 505                         }
 506
 507                         /* Check if we changed client->x or client->y by updating it.
 508                          * Note the bitwise OR instead of logical OR to force evaluation of all statements */
 509                         if (client->force_reconfigure |
 510                             update_if_necessary(&(client->rect.x), container->x) |
 511                             update_if_necessary(&(client->rect.y), container->y + height) |
 512                             update_if_necessary(&(client->rect.width), container->width) |
 513                             update_if_necessary(&(client->rect.height), container->height - height))
 514                                 resize_client(conn, client);
 515
 516                         client->force_reconfigure = false;
 517
 518                         int offset_x = 0;
 519                         int offset_y = 0;
 520                         if (container->mode == MODE_STACK ||
 521                             (container->mode == MODE_TABBED &&
 522                              container->stack_limit == STACK_LIMIT_COLS)) {
 523                                 if (container->stack_limit == STACK_LIMIT_COLS) {
 524                                         offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 525                                         offset_y = current_row * decoration_height;
 526                                         current_row++;
 527                                         if ((current_row % wrap) == 0) {
 528                                                 current_col++;
 529                                                 current_row = 0;
 530                                         }
 531                                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 532                                         offset_x = current_col * wrap;
 533                                         offset_y = current_row * decoration_height;
 534                                         current_row++;
 535                                         if ((current_row % container->stack_limit_value) == 0) {
 536                                                 current_col++;
 537                                                 current_row = 0;
 538                                         }
 539                                 } else {
 540                                         offset_y = current_client * decoration_height;
 541                                 }
 542                                 current_client++;
 543                         } else if (container->mode == MODE_TABBED) {
 544                                 if (container->stack_limit == STACK_LIMIT_ROWS) {
 545                                         LOG("You limited a tabbed container in its rows. "
 546                                             "This makes no sense in tabbing mode.\n");
 547                                 }
 548                                 offset_x = current_client++ * size_each;
 549                         }
 550                         decorate_window(conn, client, stack_win->pixmap.id, stack_win->pixmap.gc,
 551                                         offset_x, offset_y);
 552                 }
 553
 554                 /* Check if we need to fill one column because of an uneven
 555                  * amount of windows */
 556                 if (container->mode == MODE_STACK) {
 557                         if (container->stack_limit == STACK_LIMIT_COLS && (current_col % 2) != 0) {
 558                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 559
 560                                 int offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 561                                 int offset_y = current_row * decoration_height;
 562                                 xcb_rectangle_t rect = {offset_x, offset_y,
 563                                                         offset_x + container->width,
 564                                                         offset_y + decoration_height };
 565                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 566                         } else if (container->stack_limit == STACK_LIMIT_ROWS && (current_row % 2) != 0) {
 567                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 568
 569                                 int offset_x = current_col * wrap;
 570                                 int offset_y = current_row * decoration_height;
 571                                 xcb_rectangle_t rect = {offset_x, offset_y,
 572                                                         offset_x + container->width,
 573                                                         offset_y + decoration_height };
 574                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 575                         }
 576                 }
 577
 578                 xcb_copy_area(conn, stack_win->pixmap.id, stack_win->window, stack_win->pixmap.gc,
 579                               0, 0, 0, 0, stack_win->rect.width, stack_win->rect.height);
 580         }
 581 }
 582
 583 static void render_bars(xcb_connection_t *conn, Workspace *r_ws, int width, int *height) {
 584         Client *client;
 585         SLIST_FOREACH(client, &(r_ws->screen->dock_clients), dock_clients) {
 586                 DLOG("client is at %d, should be at %d\n", client->rect.y, *height);
 587                 if (client->force_reconfigure |
 588                     update_if_necessary(&(client->rect.x), r_ws->rect.x) |
 589                     update_if_necessary(&(client->rect.y), *height))
 590                         reposition_client(conn, client);
 591
 592                 if (client->force_reconfigure |
 593                     update_if_necessary(&(client->rect.width), width) |
 594                     update_if_necessary(&(client->rect.height), client->desired_height))
 595                         resize_client(conn, client);
 596
 597                 client->force_reconfigure = false;
 598                 DLOG("desired_height = %d\n", client->desired_height);
 599                 *height += client->desired_height;
 600         }
 601 }
 602
 603 static void render_internal_bar(xcb_connection_t *conn, Workspace *r_ws, int width, int height) {
 604         i3Font *font = load_font(conn, config.font);
 605         i3Screen *screen = r_ws->screen;
 606         enum { SET_NORMAL = 0, SET_FOCUSED = 1 };
 607
 608         /* Fill the whole bar in black */
 609         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 610         xcb_rectangle_t rect = {0, 0, width, height};
 611         xcb_poly_fill_rectangle(conn, screen->bar, screen->bargc, 1, &rect);
 612
 613         /* Set font */
 614         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FONT, font->id);
 615
 616         int drawn = 0;
 617         Workspace *ws;
 618         TAILQ_FOREACH(ws, workspaces, workspaces) {
 619                 if (ws->screen != screen)
 620                         continue;
 621
 622                 struct Colortriple *color;
 623
 624                 if (screen->current_workspace == ws)
 625                         color = &(config.bar.focused);
 626                 else if (ws->urgent)
 627                         color = &(config.bar.urgent);
 628                 else color = &(config.bar.unfocused);
 629
 630                 /* Draw the outer rect */
 631                 xcb_draw_rect(conn, screen->bar, screen->bargc, color->border,
 632                               drawn,              /* x */
 633                               1,                  /* y */
 634                               ws->text_width + 5 + 5, /* width = text width + 5 px left + 5px right */
 635                               height - 2          /* height = max. height - 1 px upper and 1 px bottom border */);
 636
 637                 /* Draw the background of this rect */
 638                 xcb_draw_rect(conn, screen->bar, screen->bargc, color->background,
 639                               drawn + 1,
 640                               2,
 641                               ws->text_width + 4 + 4,
 642                               height - 4);
 643
 644                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, color->text);
 645                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_BACKGROUND, color->background);
 646                 xcb_image_text_16(conn, ws->name_len, screen->bar, screen->bargc, drawn + 5 /* X */,
 647                                   font->height + 1 /* Y = baseline of font */,
 648                                   (xcb_char2b_t*)ws->name);
 649                 drawn += ws->text_width + 12;
 650         }
 651 }
 652
 653 /*
 654  * Modifies the event mask of all clients on the given workspace to either ignore or to handle
 655  * enter notifies. It is handy to ignore notifies because they will be sent when a window is mapped
 656  * under the cursor, thus when the user didn’t enter the window actively at all.
 657  *
 658  */
 659 void ignore_enter_notify_forall(xcb_connection_t *conn, Workspace *workspace, bool ignore_enter_notify) {
 660         Client *client;
 661         uint32_t values[1];
 662
 663         FOR_TABLE(workspace) {
 664                 if (workspace->table[cols][rows] == NULL)
 665                         continue;
 666
 667                 CIRCLEQ_FOREACH(client, &(workspace->table[cols][rows]->clients), clients) {
 668                         /* Change event mask for the decorations */
 669                         values[0] = FRAME_EVENT_MASK;
 670                         if (ignore_enter_notify)
 671                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 672                         xcb_change_window_attributes(conn, client->frame, XCB_CW_EVENT_MASK, values);
 673
 674                         /* Change event mask for the child itself */
 675                         values[0] = CHILD_EVENT_MASK;
 676                         if (ignore_enter_notify)
 677                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 678                         xcb_change_window_attributes(conn, client->child, XCB_CW_EVENT_MASK, values);
 679                 }
 680         }
 681 }
 682
 683 /*
 684  * Renders the given workspace on the given screen
 685  *
 686  */
 687 void render_workspace(xcb_connection_t *conn, i3Screen *screen, Workspace *r_ws) {
 688         i3Font *font = load_font(conn, config.font);
 689         int width = r_ws->rect.width;
 690         int height = r_ws->rect.height;
 691
 692         /* Reserve space for dock clients */
 693         Client *client;
 694         SLIST_FOREACH(client, &(screen->dock_clients), dock_clients)
 695                 height -= client->desired_height;
 696
 697         /* Space for the internal bar */
 698         height -= (font->height + 6);
 699
 700         int xoffset[r_ws->rows];
 701         int yoffset[r_ws->cols];
 702         /* Initialize offsets */
 703         for (int cols = 0; cols < r_ws->cols; cols++)
 704                 yoffset[cols] = r_ws->rect.y;
 705         for (int rows = 0; rows < r_ws->rows; rows++)
 706                 xoffset[rows] = r_ws->rect.x;
 707
 708         ignore_enter_notify_forall(conn, r_ws, true);
 709
 710         /* Go through the whole table and render what’s necessary */
 711         FOR_TABLE(r_ws) {
 712                 Container *container = r_ws->table[cols][rows];
 713                 if (container == NULL)
 714                         continue;
 715                 int single_width = -1, single_height = -1;
 716                 /* Update position of the container */
 717                 container->row = rows;
 718                 container->col = cols;
 719                 container->x = xoffset[rows];
 720                 container->y = yoffset[cols];
 721                 container->width = 0;
 722
 723                 for (int c = 0; c < container->colspan; c++) {
 724                         if (r_ws->width_factor[cols+c] == 0)
 725                                 container->width += (width / r_ws->cols);
 726                         else container->width += get_unoccupied_x(r_ws) * r_ws->width_factor[cols+c];
 727
 728                         if (single_width == -1)
 729                                 single_width = container->width;
 730                 }
 731
 732                 DLOG("height is %d\n", height);
 733
 734                 container->height = 0;
 735
 736                 for (int c = 0; c < container->rowspan; c++) {
 737                         if (r_ws->height_factor[rows+c] == 0)
 738                                 container->height += (height / r_ws->rows);
 739                         else container->height += get_unoccupied_y(r_ws) * r_ws->height_factor[rows+c];
 740
 741                         if (single_height == -1)
 742                                 single_height = container->height;
 743                 }
 744
 745                 /* Render the container if it is not empty */
 746                 render_container(conn, container);
 747
 748                 xoffset[rows] += single_width;
 749                 yoffset[cols] += single_height;
 750         }
 751
 752         ignore_enter_notify_forall(conn, r_ws, false);
 753
 754         render_bars(conn, r_ws, width, &height);
 755         render_internal_bar(conn, r_ws, width, font->height + 6);
 756 }
 757
 758 /*
 759  * Renders the whole layout, that is: Go through each screen, each workspace, each container
 760  * and render each client. This also renders the bars.
 761  *
 762  * If you don’t need to render *everything*, you should call render_container on the container
 763  * you want to refresh.
 764  *
 765  */
 766 void render_layout(xcb_connection_t *conn) {
 767         i3Screen *screen;
 768
 769         if (virtual_screens == NULL)
 770                 return;
 771
 772         TAILQ_FOREACH(screen, virtual_screens, screens)
 773                 if (screen->current_workspace != NULL)
 774                         render_workspace(conn, screen, screen->current_workspace);
 775
 776         xcb_flush(conn);
 777 }