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         double unoccupied = workspace->rect.width;
  51         double default_factor = ((float)workspace->rect.width / workspace->cols) / workspace->rect.width;
  52
  53         LOG("get_unoccupied_x(), starting with %f, default_factor = %f\n", unoccupied, default_factor);
  54
  55         for (int cols = 0; cols < workspace->cols; cols++) {
  56                 LOG("width_factor[%d] = %f, unoccupied = %f\n", cols, workspace->width_factor[cols], unoccupied);
  57
  58                 if (workspace->width_factor[cols] == 0)
  59                         unoccupied -= workspace->rect.width * default_factor;
  60         }
  61
  62         LOG("unoccupied space: %f\n", unoccupied);
  63         return unoccupied;
  64 }
  65
  66 /* See get_unoccupied_x() */
  67 int get_unoccupied_y(Workspace *workspace) {
  68         int height = workspace_height(workspace);
  69         double unoccupied = height;
  70         double default_factor = ((float)height / workspace->rows) / height;
  71
  72         LOG("get_unoccupied_y(), starting with %f, default_factor = %f\n", unoccupied, default_factor);
  73
  74         for (int rows = 0; rows < workspace->rows; rows++) {
  75                 LOG("height_factor[%d] = %f, unoccupied = %f\n", rows, workspace->height_factor[rows], unoccupied);
  76                 if (workspace->height_factor[rows] == 0)
  77                         unoccupied -= height * default_factor;
  78         }
  79
  80         LOG("unoccupied space: %f\n", unoccupied);
  81         return unoccupied;
  82 }
  83
  84 /*
  85  * Redecorates the given client correctly by checking if it’s in a stacking container and
  86  * re-rendering the stack window or just calling decorate_window if it’s not in a stacking
  87  * container.
  88  *
  89  */
  90 void redecorate_window(xcb_connection_t *conn, Client *client) {
  91         if (client->container != NULL &&
  92             (client->container->mode == MODE_STACK ||
  93              client->container->mode == MODE_TABBED)) {
  94                 render_container(conn, client->container);
  95                 /* We clear the frame to generate exposure events, because the color used
  96                    in drawing may be different */
  97                 xcb_clear_area(conn, true, client->frame, 0, 0, client->rect.width, client->rect.height);
  98         } else decorate_window(conn, client, client->frame, client->titlegc, 0, 0);
  99         xcb_flush(conn);
 100 }
 101
 102 /*
 103  * (Re-)draws window decorations for a given Client onto the given drawable/graphic context.
 104  * When in stacking mode, the window decorations are drawn onto an own window.
 105  *
 106  */
 107 void decorate_window(xcb_connection_t *conn, Client *client, xcb_drawable_t drawable,
 108                      xcb_gcontext_t gc, int offset_x, int offset_y) {
 109         i3Font *font = load_font(conn, config.font);
 110         int decoration_height = font->height + 2 + 2;
 111         struct Colortriple *color;
 112         Client *last_focused;
 113
 114         /* Clients without a container (docks) won’t get decorated */
 115         if (client->dock)
 116                 return;
 117
 118         last_focused = SLIST_FIRST(&(client->workspace->focus_stack));
 119         /* Is the window urgent? */
 120         if (client->urgent)
 121                 color = &(config.client.urgent);
 122         else {
 123                 if (client_is_floating(client)) {
 124                         if (last_focused == client)
 125                                 color = &(config.client.focused);
 126                         else color = &(config.client.unfocused);
 127                 } else {
 128                         if (client->container->currently_focused == client) {
 129                                 /* Distinguish if the window is currently focused… */
 130                                 if (last_focused == client && c_ws == client->workspace)
 131                                         color = &(config.client.focused);
 132                                 /* …or if it is the focused window in a not focused container */
 133                                 else color = &(config.client.focused_inactive);
 134                         } else color = &(config.client.unfocused);
 135                 }
 136         }
 137
 138         /* Our plan is the following:
 139            - Draw a rect around the whole client in color->background
 140            - Draw two lines in a lighter color
 141            - Draw the window’s title
 142          */
 143
 144         /* Draw a rectangle in background color around the window */
 145         if (client->borderless && (client->container == NULL ||
 146             (client->container->mode != MODE_STACK &&
 147              client->container->mode != MODE_TABBED)))
 148                 xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 149         else xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, color->background);
 150
 151         /* In stacking mode, we only render the rect for this specific decoration */
 152         if (client->container != NULL && (client->container->mode == MODE_STACK || client->container->mode == MODE_TABBED)) {
 153                 /* We need to use the container’s width because it is the more recent value - when
 154                    in stacking mode, clients get reconfigured only on demand (the not active client
 155                    is not reconfigured), so the client’s rect.width would be wrong */
 156                 xcb_rectangle_t rect = {offset_x, offset_y,
 157                                         offset_x + client->container->width,
 158                                         offset_y + decoration_height };
 159                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 160         } else {
 161                 xcb_rectangle_t rect = {0, 0, client->rect.width, client->rect.height};
 162                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 163
 164                 /* Draw the inner background to have a black frame around clients (such as mplayer)
 165                    which cannot be resized exactly in our frames and therefore are centered */
 166                 xcb_change_gc_single(conn, client->titlegc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 167                 if (client->titlebar_position == TITLEBAR_OFF) {
 168                         xcb_rectangle_t crect = {1, 1, client->rect.width - (1 + 1), client->rect.height - (1 + 1)};
 169                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 170                 } else {
 171                         xcb_rectangle_t crect = {2, decoration_height,
 172                                                  client->rect.width - (2 + 2), client->rect.height - 2 - decoration_height};
 173                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 174                 }
 175         }
 176
 177         if (client->titlebar_position != TITLEBAR_OFF) {
 178                 /* Draw the lines */
 179                 xcb_draw_line(conn, drawable, gc, color->border, offset_x, offset_y, offset_x + client->rect.width, offset_y);
 180                 if ((client->container == NULL ||
 181                     (client->container->mode != MODE_STACK &&
 182                      client->container->mode != MODE_TABBED) ||
 183                     CIRCLEQ_NEXT_OR_NULL(&(client->container->clients), client, clients) == NULL))
 184                         xcb_draw_line(conn, drawable, gc, color->border,
 185                                       offset_x + 2, /* x */
 186                                       offset_y + font->height + 3, /* y */
 187                                       offset_x + client->rect.width - 3, /* to_x */
 188                                       offset_y + font->height + 3 /* to_y */);
 189         }
 190
 191         /* If the client has a title, we draw it */
 192         if (client->name != NULL && client->titlebar_position != TITLEBAR_OFF) {
 193                 /* Draw the font */
 194                 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
 195                 uint32_t values[] = { color->text, color->background, font->id };
 196                 xcb_change_gc(conn, gc, mask, values);
 197
 198                 /* name_len == -1 means this is a legacy application which does not specify _NET_WM_NAME,
 199                    and we don’t handle the old window name (COMPOUND_TEXT) but only _NET_WM_NAME, which
 200                    is UTF-8 */
 201                 if (client->name_len == -1)
 202                         xcb_image_text_8(conn, strlen(client->name), drawable, gc, offset_x + 3 /* X */,
 203                                          offset_y + font->height /* Y = baseline of font */, client->name);
 204                 else
 205                         xcb_image_text_16(conn, client->name_len, drawable, gc, offset_x + 3 /* X */,
 206                                           offset_y + font->height /* Y = baseline of font */, (xcb_char2b_t*)client->name);
 207         }
 208 }
 209
 210 /*
 211  * Pushes the client’s x and y coordinates to X11
 212  *
 213  */
 214 void reposition_client(xcb_connection_t *conn, Client *client) {
 215         i3Screen *screen;
 216
 217         LOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 218         /* Note: We can use a pointer to client->x like an array of uint32_ts
 219            because it is followed by client->y by definition */
 220         xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
 221
 222         if (!client_is_floating(client))
 223                 return;
 224
 225         /* If the client is floating, we need to check if we moved it to a different workspace */
 226         if (client->workspace->screen == (screen = get_screen_containing(client->rect.x, client->rect.y)))
 227                 return;
 228
 229         if (screen == NULL) {
 230                 LOG("Boundary checking disabled, no screen found for (%d, %d)\n", client->rect.x, client->rect.y);
 231                 return;
 232         }
 233
 234         LOG("Client is on workspace %p with screen %p\n", client->workspace, client->workspace->screen);
 235         LOG("but screen at %d, %d is %p\n", client->rect.x, client->rect.y, screen);
 236         floating_assign_to_workspace(client, screen->current_workspace);
 237 }
 238
 239 /*
 240  * Pushes the client’s width/height to X11 and resizes the child window. This
 241  * function also updates the client’s position, so if you work on tiling clients
 242  * only, you can use this function instead of separate calls to reposition_client
 243  * and resize_client to reduce flickering.
 244  *
 245  */
 246 void resize_client(xcb_connection_t *conn, Client *client) {
 247         i3Font *font = load_font(conn, config.font);
 248
 249         LOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 250         LOG("resizing client 0x%08x to %d x %d\n", client->frame, client->rect.width, client->rect.height);
 251         xcb_configure_window(conn, client->frame,
 252                         XCB_CONFIG_WINDOW_X |
 253                         XCB_CONFIG_WINDOW_Y |
 254                         XCB_CONFIG_WINDOW_WIDTH |
 255                         XCB_CONFIG_WINDOW_HEIGHT,
 256                         &(client->rect.x));
 257
 258         /* Adjust the position of the child inside its frame.
 259          * The coordinates of the child are relative to its frame, we
 260          * add a border of 2 pixel to each value */
 261         uint32_t mask = XCB_CONFIG_WINDOW_X |
 262                         XCB_CONFIG_WINDOW_Y |
 263                         XCB_CONFIG_WINDOW_WIDTH |
 264                         XCB_CONFIG_WINDOW_HEIGHT;
 265         Rect *rect = &(client->child_rect);
 266         switch ((client->container != NULL ? client->container->mode : MODE_DEFAULT)) {
 267                 case MODE_STACK:
 268                 case MODE_TABBED:
 269                         rect->x = 2;
 270                         rect->y = 0;
 271                         rect->width = client->rect.width - (2 + 2);
 272                         rect->height = client->rect.height - 2;
 273                         break;
 274                 default:
 275                         if (client->titlebar_position == TITLEBAR_OFF && client->borderless) {
 276                                 rect->x = 0;
 277                                 rect->y = 0;
 278                                 rect->width = client->rect.width;
 279                                 rect->height = client->rect.height;
 280                         } else if (client->titlebar_position == TITLEBAR_OFF && !client->borderless) {
 281                                 rect->x = 1;
 282                                 rect->y = 1;
 283                                 rect->width = client->rect.width - 1 - 1;
 284                                 rect->height = client->rect.height - 1 - 1;
 285                         } else {
 286                                 rect->x = 2;
 287                                 rect->y = font->height + 2 + 2;
 288                                 rect->width = client->rect.width - (2 + 2);
 289                                 rect->height = client->rect.height - ((font->height + 2 + 2) + 2);
 290                         }
 291                         break;
 292         }
 293
 294         rect->width -= (2 * client->border_width);
 295         rect->height -= (2 * client->border_width);
 296
 297         /* Obey the ratio, if any */
 298         if (client->proportional_height != 0 &&
 299             client->proportional_width != 0) {
 300                 LOG("proportional height = %d, width = %d\n", client->proportional_height, client->proportional_width);
 301                 double new_height = rect->height + 1;
 302                 int new_width = rect->width;
 303
 304                 while (new_height > rect->height) {
 305                         new_height = ((double)client->proportional_height / client->proportional_width) * new_width;
 306
 307                         if (new_height > rect->height)
 308                                 new_width--;
 309                 }
 310                 /* Center the window */
 311                 rect->y += ceil(rect->height / 2) - floor(new_height / 2);
 312                 rect->x += ceil(rect->width / 2) - floor(new_width / 2);
 313
 314                 rect->height = new_height;
 315                 rect->width = new_width;
 316                 LOG("new_height = %f, new_width = %d\n", new_height, new_width);
 317         }
 318
 319         if (client->height_increment > 1) {
 320                 int old_height = rect->height;
 321                 rect->height -= (rect->height - client->base_height) % client->height_increment;
 322                 LOG("Lost %d pixel due to client's height_increment (%d px, base_height = %d)\n",
 323                     old_height - rect->height, client->height_increment, client->base_height);
 324         }
 325
 326         if (client->width_increment > 1) {
 327                 int old_width = rect->width;
 328                 rect->width -= (rect->width - client->base_width) % client->width_increment;
 329                 LOG("Lost %d pixel due to client's width_increment (%d px, base_width = %d)\n",
 330                     old_width - rect->width, client->width_increment, client->base_width);
 331         }
 332
 333         LOG("child will be at %dx%d with size %dx%d\n", rect->x, rect->y, rect->width, rect->height);
 334
 335         xcb_configure_window(conn, client->child, mask, &(rect->x));
 336
 337         /* After configuring a child window we need to fake a configure_notify_event (see ICCCM 4.2.3).
 338          * This is necessary to inform the client of its position relative to the root window,
 339          * not relative to its frame (as done in the configure_notify_event by the x server). */
 340         fake_absolute_configure_notify(conn, client);
 341
 342         /* Force redrawing after resizing the window because any now lost
 343          * pixels could contain old garbage. */
 344         xcb_expose_event_t generated;
 345         generated.window = client->frame;
 346         generated.count = 0;
 347         handle_expose_event(NULL, conn, &generated);
 348 }
 349
 350 /*
 351  * Renders the given container. Is called by render_layout() or individually (for example
 352  * when focus changes in a stacking container)
 353  *
 354  */
 355 void render_container(xcb_connection_t *conn, Container *container) {
 356         Client *client;
 357         int num_clients = 0, current_client = 0;
 358
 359         CIRCLEQ_FOREACH(client, &(container->clients), clients)
 360                 num_clients++;
 361
 362         if (container->mode == MODE_DEFAULT) {
 363                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 364                         /* If the client is in fullscreen mode, it does not get reconfigured */
 365                         if (container->workspace->fullscreen_client == client) {
 366                                 current_client++;
 367                                 continue;
 368                         }
 369
 370                         /* Check if we changed client->x or client->y by updating it.
 371                          * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 372                         if (client->force_reconfigure |
 373                             update_if_necessary(&(client->rect.x), container->x) |
 374                             update_if_necessary(&(client->rect.y), container->y +
 375                                         (container->height / num_clients) * current_client) |
 376                             update_if_necessary(&(client->rect.width), container->width) |
 377                             update_if_necessary(&(client->rect.height), container->height / num_clients))
 378                                 resize_client(conn, client);
 379
 380                         /* TODO: vertical default layout */
 381
 382                         client->force_reconfigure = false;
 383
 384                         current_client++;
 385                 }
 386         } else {
 387                 i3Font *font = load_font(conn, config.font);
 388                 int decoration_height = (font->height + 2 + 2);
 389                 struct Stack_Window *stack_win = &(container->stack_win);
 390                 /* The size for each tab (width), necessary as a separate variable
 391                  * because num_clients gets fixed to 1 in tabbed mode. */
 392                 int size_each = (num_clients == 0 ? container->width : container->width / num_clients);
 393                 int stack_lines = num_clients;
 394
 395                 /* Check if we need to remap our stack title window, it gets unmapped when the container
 396                    is empty in src/handlers.c:unmap_notify() */
 397                 if (stack_win->rect.height == 0 && num_clients > 0) {
 398                         LOG("remapping stack win\n");
 399                         xcb_map_window(conn, stack_win->window);
 400                 } else LOG("not remapping stackwin, height = %d, num_clients = %d\n",
 401                                 stack_win->rect.height, num_clients);
 402
 403                 if (container->mode == MODE_TABBED) {
 404                         /* By setting num_clients to 1 we force that the stack window will be only one line
 405                          * high. The rest of the code is useful in both cases. */
 406                         LOG("tabbed mode, setting num_clients = 1\n");
 407                         if (stack_lines > 1)
 408                                 stack_lines = 1;
 409                 }
 410
 411                 if (container->stack_limit == STACK_LIMIT_COLS) {
 412                         stack_lines = ceil((float)num_clients / container->stack_limit_value);
 413                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 414                         stack_lines = min(num_clients, container->stack_limit_value);
 415                 }
 416
 417                 /* Check if we need to reconfigure our stack title window */
 418                 if (update_if_necessary(&(stack_win->rect.x), container->x) |
 419                     update_if_necessary(&(stack_win->rect.y), container->y) |
 420                     update_if_necessary(&(stack_win->rect.width), container->width) |
 421                     update_if_necessary(&(stack_win->rect.height), decoration_height * stack_lines)) {
 422
 423                         /* Configuration can happen in two slightly different ways:
 424
 425                            If there is no client in fullscreen mode, 5 parameters are passed
 426                            (x, y, width, height, stack mode is set to above which means top-most position).
 427
 428                            If there is a fullscreen client, the fourth parameter is set to to the
 429                            fullscreen window as sibling and the stack mode is set to below, which means
 430                            that the stack_window will be placed just below the sibling, that is, under
 431                            the fullscreen window.
 432                          */
 433                         uint32_t values[] = { stack_win->rect.x, stack_win->rect.y,
 434                                               stack_win->rect.width, stack_win->rect.height,
 435                                               XCB_STACK_MODE_ABOVE, XCB_STACK_MODE_BELOW };
 436                         uint32_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
 437                                         XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT |
 438                                         XCB_CONFIG_WINDOW_STACK_MODE;
 439
 440                         /* Raise the stack window, but keep it below the first floating client
 441                          * and below the fullscreen client (if any) */
 442                         Client *first_floating = TAILQ_FIRST(&(container->workspace->floating_clients));
 443                         if (first_floating != TAILQ_END(&(container->workspace->floating_clients))) {
 444                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 445                                 values[4] = first_floating->frame;
 446                         } else if (container->workspace->fullscreen_client != NULL) {
 447                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 448                                 values[4] = container->workspace->fullscreen_client->frame;
 449                         }
 450
 451                         xcb_configure_window(conn, stack_win->window, mask, values);
 452                 }
 453
 454                 /* Prepare the pixmap for usage */
 455                 cached_pixmap_prepare(conn, &(stack_win->pixmap));
 456
 457                 int current_row = 0, current_col = 0;
 458                 int wrap = 0;
 459
 460                 if (container->stack_limit == STACK_LIMIT_COLS) {
 461                         /* wrap stores the number of rows after which we will
 462                          * wrap to a new column. */
 463                         wrap = container->stack_limit_value;
 464                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 465                         /* When limiting rows, the wrap variable serves a
 466                          * slightly different purpose: it holds the number of
 467                          * pixels which each client will get. This is constant
 468                          * during the following loop, so it saves us some
 469                          * divisions and ceil()ing. */
 470                         wrap = (stack_win->rect.width / ceil((float)num_clients / container->stack_limit_value));
 471                 }
 472
 473                 /* Render the decorations of all clients */
 474                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 475                         /* If the client is in fullscreen mode, it does not get reconfigured */
 476                         if (container->workspace->fullscreen_client == client) {
 477                                 current_client++;
 478                                 continue;
 479                         }
 480
 481                         /* Check if we changed client->x or client->y by updating it.
 482                          * Note the bitwise OR instead of logical OR to force evaluation of all statements */
 483                         if (client->force_reconfigure |
 484                             update_if_necessary(&(client->rect.x), container->x) |
 485                             update_if_necessary(&(client->rect.y), container->y + (decoration_height * stack_lines)) |
 486                             update_if_necessary(&(client->rect.width), container->width) |
 487                             update_if_necessary(&(client->rect.height), container->height - (decoration_height * stack_lines)))
 488                                 resize_client(conn, client);
 489
 490                         client->force_reconfigure = false;
 491
 492                         int offset_x = 0;
 493                         int offset_y = 0;
 494                         if (container->mode == MODE_STACK ||
 495                             (container->mode == MODE_TABBED &&
 496                              container->stack_limit == STACK_LIMIT_COLS)) {
 497                                 if (container->stack_limit == STACK_LIMIT_COLS) {
 498                                         offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 499                                         offset_y = current_row * decoration_height;
 500                                         current_col++;
 501                                         if ((current_col % wrap) == 0) {
 502                                                 current_row++;
 503                                                 current_col = 0;
 504                                         }
 505                                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 506                                         offset_x = current_col * wrap;
 507                                         offset_y = current_row * decoration_height;
 508                                         current_row++;
 509                                         if ((current_row % container->stack_limit_value) == 0) {
 510                                                 current_col++;
 511                                                 current_row = 0;
 512                                         }
 513                                 } else {
 514                                         offset_y = current_client * decoration_height;
 515                                 }
 516                                 current_client++;
 517                         } else if (container->mode == MODE_TABBED) {
 518                                 if (container->stack_limit == STACK_LIMIT_ROWS) {
 519                                         LOG("You limited this container in its rows. "
 520                                             "This makes no sense in tabbing mode.\n");
 521                                 }
 522                                 offset_x = current_client++ * size_each;
 523                         }
 524                         decorate_window(conn, client, stack_win->pixmap.id, stack_win->pixmap.gc,
 525                                         offset_x, offset_y);
 526                 }
 527
 528                 /* Check if we need to fill one column because of an uneven
 529                  * amount of windows */
 530                 if (container->mode == MODE_STACK) {
 531                         if (container->stack_limit == STACK_LIMIT_COLS && (current_col % 2) != 0) {
 532                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 533
 534                                 int offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 535                                 int offset_y = current_row * decoration_height;
 536                                 xcb_rectangle_t rect = {offset_x, offset_y,
 537                                                         offset_x + container->width,
 538                                                         offset_y + decoration_height };
 539                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 540                         } else if (container->stack_limit == STACK_LIMIT_ROWS && (current_row % 2) != 0) {
 541                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 542
 543                                 int offset_x = current_col * wrap;
 544                                 int offset_y = current_row * decoration_height;
 545                                 xcb_rectangle_t rect = {offset_x, offset_y,
 546                                                         offset_x + container->width,
 547                                                         offset_y + decoration_height };
 548                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 549                         }
 550                 }
 551
 552                 xcb_copy_area(conn, stack_win->pixmap.id, stack_win->window, stack_win->pixmap.gc,
 553                               0, 0, 0, 0, stack_win->rect.width, stack_win->rect.height);
 554         }
 555 }
 556
 557 static void render_bars(xcb_connection_t *conn, Workspace *r_ws, int width, int *height) {
 558         Client *client;
 559         SLIST_FOREACH(client, &(r_ws->screen->dock_clients), dock_clients) {
 560                 LOG("client is at %d, should be at %d\n", client->rect.y, *height);
 561                 if (client->force_reconfigure |
 562                     update_if_necessary(&(client->rect.x), r_ws->rect.x) |
 563                     update_if_necessary(&(client->rect.y), *height))
 564                         reposition_client(conn, client);
 565
 566                 if (client->force_reconfigure |
 567                     update_if_necessary(&(client->rect.width), width) |
 568                     update_if_necessary(&(client->rect.height), client->desired_height))
 569                         resize_client(conn, client);
 570
 571                 client->force_reconfigure = false;
 572                 LOG("desired_height = %d\n", client->desired_height);
 573                 *height += client->desired_height;
 574         }
 575 }
 576
 577 static void render_internal_bar(xcb_connection_t *conn, Workspace *r_ws, int width, int height) {
 578         i3Font *font = load_font(conn, config.font);
 579         i3Screen *screen = r_ws->screen;
 580         enum { SET_NORMAL = 0, SET_FOCUSED = 1 };
 581
 582         /* Fill the whole bar in black */
 583         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 584         xcb_rectangle_t rect = {0, 0, width, height};
 585         xcb_poly_fill_rectangle(conn, screen->bar, screen->bargc, 1, &rect);
 586
 587         /* Set font */
 588         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FONT, font->id);
 589
 590         int drawn = 0;
 591         Workspace *ws;
 592         TAILQ_FOREACH(ws, workspaces, workspaces) {
 593                 if (ws->screen != screen)
 594                         continue;
 595
 596                 struct Colortriple *color;
 597
 598                 if (screen->current_workspace == ws)
 599                         color = &(config.bar.focused);
 600                 else if (ws->urgent)
 601                         color = &(config.bar.urgent);
 602                 else color = &(config.bar.unfocused);
 603
 604                 /* Draw the outer rect */
 605                 xcb_draw_rect(conn, screen->bar, screen->bargc, color->border,
 606                               drawn,              /* x */
 607                               1,                  /* y */
 608                               ws->text_width + 5 + 5, /* width = text width + 5 px left + 5px right */
 609                               height - 2          /* height = max. height - 1 px upper and 1 px bottom border */);
 610
 611                 /* Draw the background of this rect */
 612                 xcb_draw_rect(conn, screen->bar, screen->bargc, color->background,
 613                               drawn + 1,
 614                               2,
 615                               ws->text_width + 4 + 4,
 616                               height - 4);
 617
 618                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, color->text);
 619                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_BACKGROUND, color->background);
 620                 xcb_image_text_16(conn, ws->name_len, screen->bar, screen->bargc, drawn + 5 /* X */,
 621                                   font->height + 1 /* Y = baseline of font */,
 622                                   (xcb_char2b_t*)ws->name);
 623                 drawn += ws->text_width + 12;
 624         }
 625 }
 626
 627 /*
 628  * Modifies the event mask of all clients on the given workspace to either ignore or to handle
 629  * enter notifies. It is handy to ignore notifies because they will be sent when a window is mapped
 630  * under the cursor, thus when the user didn’t enter the window actively at all.
 631  *
 632  */
 633 void ignore_enter_notify_forall(xcb_connection_t *conn, Workspace *workspace, bool ignore_enter_notify) {
 634         Client *client;
 635         uint32_t values[1];
 636
 637         FOR_TABLE(workspace) {
 638                 if (workspace->table[cols][rows] == NULL)
 639                         continue;
 640
 641                 CIRCLEQ_FOREACH(client, &(workspace->table[cols][rows]->clients), clients) {
 642                         /* Change event mask for the decorations */
 643                         values[0] = FRAME_EVENT_MASK;
 644                         if (ignore_enter_notify)
 645                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 646                         xcb_change_window_attributes(conn, client->frame, XCB_CW_EVENT_MASK, values);
 647
 648                         /* Change event mask for the child itself */
 649                         values[0] = CHILD_EVENT_MASK;
 650                         if (ignore_enter_notify)
 651                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 652                         xcb_change_window_attributes(conn, client->child, XCB_CW_EVENT_MASK, values);
 653                 }
 654         }
 655 }
 656
 657 /*
 658  * Renders the given workspace on the given screen
 659  *
 660  */
 661 void render_workspace(xcb_connection_t *conn, i3Screen *screen, Workspace *r_ws) {
 662         i3Font *font = load_font(conn, config.font);
 663         int width = r_ws->rect.width;
 664         int height = r_ws->rect.height;
 665
 666         /* Reserve space for dock clients */
 667         Client *client;
 668         SLIST_FOREACH(client, &(screen->dock_clients), dock_clients)
 669                 height -= client->desired_height;
 670
 671         /* Space for the internal bar */
 672         height -= (font->height + 6);
 673
 674         int xoffset[r_ws->rows];
 675         int yoffset[r_ws->cols];
 676         /* Initialize offsets */
 677         for (int cols = 0; cols < r_ws->cols; cols++)
 678                 yoffset[cols] = r_ws->rect.y;
 679         for (int rows = 0; rows < r_ws->rows; rows++)
 680                 xoffset[rows] = r_ws->rect.x;
 681
 682         ignore_enter_notify_forall(conn, r_ws, true);
 683
 684         /* Go through the whole table and render what’s necessary */
 685         FOR_TABLE(r_ws) {
 686                 Container *container = r_ws->table[cols][rows];
 687                 if (container == NULL)
 688                         continue;
 689                 int single_width = -1, single_height = -1;
 690                 /* Update position of the container */
 691                 container->row = rows;
 692                 container->col = cols;
 693                 container->x = xoffset[rows];
 694                 container->y = yoffset[cols];
 695                 container->width = 0;
 696
 697                 for (int c = 0; c < container->colspan; c++) {
 698                         if (r_ws->width_factor[cols+c] == 0)
 699                                 container->width += (width / r_ws->cols);
 700                         else container->width += get_unoccupied_x(r_ws) * r_ws->width_factor[cols+c];
 701
 702                         if (single_width == -1)
 703                                 single_width = container->width;
 704                 }
 705
 706                 LOG("height is %d\n", height);
 707
 708                 container->height = 0;
 709
 710                 for (int c = 0; c < container->rowspan; c++) {
 711                         if (r_ws->height_factor[rows+c] == 0)
 712                                 container->height += (height / r_ws->rows);
 713                         else container->height += get_unoccupied_y(r_ws) * r_ws->height_factor[rows+c];
 714
 715                         if (single_height == -1)
 716                                 single_height = container->height;
 717                 }
 718
 719                 /* Render the container if it is not empty */
 720                 render_container(conn, container);
 721
 722                 xoffset[rows] += single_width;
 723                 yoffset[cols] += single_height;
 724         }
 725
 726         ignore_enter_notify_forall(conn, r_ws, false);
 727
 728         render_bars(conn, r_ws, width, &height);
 729         render_internal_bar(conn, r_ws, width, font->height + 6);
 730 }
 731
 732 /*
 733  * Renders the whole layout, that is: Go through each screen, each workspace, each container
 734  * and render each client. This also renders the bars.
 735  *
 736  * If you don’t need to render *everything*, you should call render_container on the container
 737  * you want to refresh.
 738  *
 739  */
 740 void render_layout(xcb_connection_t *conn) {
 741         i3Screen *screen;
 742
 743         if (virtual_screens == NULL)
 744                 return;
 745
 746         TAILQ_FOREACH(screen, virtual_screens, screens)
 747                 if (screen->current_workspace != NULL)
 748                         render_workspace(conn, screen, screen->current_workspace);
 749
 750         xcb_flush(conn);
 751 }