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  * © 2009-2010 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 = 1.0 / workspace->cols;
  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                 if (workspace->width_factor[cols] == 0)
  49                         unoccupied -= workspace->rect.width * default_factor;
  50         }
  51
  52         DLOG("unoccupied space: %f\n", unoccupied);
  53         return unoccupied;
  54 }
  55
  56 /* See get_unoccupied_x() */
  57 int get_unoccupied_y(Workspace *workspace) {
  58         int height = workspace_height(workspace);
  59         double unoccupied = height;
  60         double default_factor = 1.0 / workspace->rows;
  61
  62         DLOG("get_unoccupied_y(), starting with %f, default_factor = %f\n", unoccupied, default_factor);
  63
  64         for (int rows = 0; rows < workspace->rows; rows++) {
  65                 DLOG("height_factor[%d] = %f, unoccupied = %f\n", rows, workspace->height_factor[rows], unoccupied);
  66                 if (workspace->height_factor[rows] == 0)
  67                         unoccupied -= height * default_factor;
  68         }
  69
  70         DLOG("unoccupied space: %f\n", unoccupied);
  71         return unoccupied;
  72 }
  73
  74 /*
  75  * Redecorates the given client correctly by checking if it’s in a stacking container and
  76  * re-rendering the stack window or just calling decorate_window if it’s not in a stacking
  77  * container.
  78  *
  79  */
  80 void redecorate_window(xcb_connection_t *conn, Client *client) {
  81         if (client->container != NULL &&
  82             (client->container->mode == MODE_STACK ||
  83              client->container->mode == MODE_TABBED)) {
  84                 render_container(conn, client->container);
  85                 /* We clear the frame to generate exposure events, because the color used
  86                    in drawing may be different */
  87                 xcb_clear_area(conn, true, client->frame, 0, 0, client->rect.width, client->rect.height);
  88         } else decorate_window(conn, client, client->frame, client->titlegc, 0, 0);
  89         xcb_flush(conn);
  90 }
  91
  92 /*
  93  * (Re-)draws window decorations for a given Client onto the given drawable/graphic context.
  94  * When in stacking mode, the window decorations are drawn onto an own window.
  95  *
  96  */
  97 void decorate_window(xcb_connection_t *conn, Client *client, xcb_drawable_t drawable,
  98                      xcb_gcontext_t gc, int offset_x, int offset_y) {
  99         i3Font *font = load_font(conn, config.font);
 100         int decoration_height = font->height + 2 + 2;
 101         struct Colortriple *color;
 102         Client *last_focused;
 103
 104         /* Clients without a container (docks) won’t get decorated */
 105         if (client->dock)
 106                 return;
 107
 108         last_focused = SLIST_FIRST(&(client->workspace->focus_stack));
 109         /* Is the window urgent? */
 110         if (client->urgent)
 111                 color = &(config.client.urgent);
 112         else {
 113                 if (client_is_floating(client)) {
 114                         if (last_focused == client)
 115                                 color = &(config.client.focused);
 116                         else color = &(config.client.unfocused);
 117                 } else {
 118                         if (client->container->currently_focused == client) {
 119                                 /* Distinguish if the window is currently focused… */
 120                                 if (last_focused == client && c_ws == client->workspace)
 121                                         color = &(config.client.focused);
 122                                 /* …or if it is the focused window in a not focused container */
 123                                 else color = &(config.client.focused_inactive);
 124                         } else color = &(config.client.unfocused);
 125                 }
 126         }
 127
 128         /* Our plan is the following:
 129            - Draw a rect around the whole client in color->background
 130            - Draw two lines in a lighter color
 131            - Draw the window’s title
 132          */
 133         int mode = container_mode(client->container, true);
 134
 135         /* Draw a rectangle in background color around the window */
 136         if (client->borderless && mode == MODE_DEFAULT)
 137                 xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, config.client.background);
 138         else xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, color->background);
 139
 140         /* In stacking mode, we only render the rect for this specific decoration */
 141         if (mode == MODE_STACK || mode == MODE_TABBED) {
 142                 /* We need to use the container’s width because it is the more recent value - when
 143                    in stacking mode, clients get reconfigured only on demand (the not active client
 144                    is not reconfigured), so the client’s rect.width would be wrong */
 145                 xcb_rectangle_t rect = {offset_x, offset_y,
 146                                         offset_x + client->container->width,
 147                                         offset_y + decoration_height };
 148                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 149         } else {
 150                 xcb_rectangle_t rect = {0, 0, client->rect.width, client->rect.height};
 151                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 152
 153                 /* Draw the inner background to a frame around clients (such as mplayer)
 154                    which cannot be resized exactly in our frames and therefore are centered */
 155                 xcb_change_gc_single(conn, client->titlegc, XCB_GC_FOREGROUND, config.client.background);
 156                 if (client->titlebar_position == TITLEBAR_OFF && client->borderless) {
 157                         xcb_rectangle_t crect = {0, 0, client->rect.width, client->rect.height};
 158                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 159                 } else if (client->titlebar_position == TITLEBAR_OFF && !client->borderless) {
 160                         xcb_rectangle_t crect = {1, 1, client->rect.width - (1 + 1), client->rect.height - (1 + 1)};
 161                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 162                 } else {
 163                         xcb_rectangle_t crect = {2, decoration_height,
 164                                                  client->rect.width - (2 + 2), client->rect.height - 2 - decoration_height};
 165                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 166                 }
 167         }
 168
 169         mode = container_mode(client->container, false);
 170
 171         if (client->titlebar_position != TITLEBAR_OFF) {
 172                 /* Draw the lines */
 173                 xcb_draw_line(conn, drawable, gc, color->border, offset_x, offset_y, offset_x + client->rect.width, offset_y);
 174                 xcb_draw_line(conn, drawable, gc, color->border,
 175                               offset_x + 2, /* x */
 176                               offset_y + font->height + 3, /* y */
 177                               offset_x + client->rect.width - 3, /* to_x */
 178                               offset_y + font->height + 3 /* to_y */);
 179         }
 180
 181         /* If the client has a title, we draw it */
 182         if (client->name != NULL &&
 183             (mode != MODE_DEFAULT || client->titlebar_position != TITLEBAR_OFF)) {
 184                 /* Draw the font */
 185                 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
 186                 uint32_t values[] = { color->text, color->background, font->id };
 187                 xcb_change_gc(conn, gc, mask, values);
 188
 189                 /* name_len == -1 means this is a legacy application which does not specify _NET_WM_NAME,
 190                    and we don’t handle the old window name (COMPOUND_TEXT) but only _NET_WM_NAME, which
 191                    is UTF-8 */
 192                 if (client->name_len == -1)
 193                         xcb_image_text_8(conn, strlen(client->name), drawable, gc, offset_x + 3 /* X */,
 194                                          offset_y + font->height /* Y = baseline of font */, client->name);
 195                 else
 196                         xcb_image_text_16(conn, client->name_len, drawable, gc, offset_x + 3 /* X */,
 197                                           offset_y + font->height /* Y = baseline of font */, (xcb_char2b_t*)client->name);
 198         }
 199 }
 200
 201 /*
 202  * Pushes the client’s x and y coordinates to X11
 203  *
 204  */
 205 void reposition_client(xcb_connection_t *conn, Client *client) {
 206         Output *output;
 207
 208         DLOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 209         /* Note: We can use a pointer to client->x like an array of uint32_ts
 210            because it is followed by client->y by definition */
 211         xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
 212
 213         if (!client_is_floating(client))
 214                 return;
 215
 216         /* If the client is floating, we need to check if we moved it to a different workspace */
 217         output = get_output_containing(client->rect.x + (client->rect.width / 2),
 218                                        client->rect.y + (client->rect.height / 2));
 219         if (client->workspace->output == output)
 220                 return;
 221
 222         if (output == NULL) {
 223                 DLOG("Boundary checking disabled, no output found for (%d, %d)\n", client->rect.x, client->rect.y);
 224                 return;
 225         }
 226
 227         if (output->current_workspace == NULL) {
 228                 DLOG("Boundary checking deferred, no current workspace on output\n");
 229                 client->force_reconfigure = true;
 230                 return;
 231         }
 232
 233         DLOG("Client is on workspace %p with output %p\n", client->workspace, client->workspace->output);
 234         DLOG("but output at %d, %d is %p\n", client->rect.x, client->rect.y, output);
 235         floating_assign_to_workspace(client, output->current_workspace);
 236
 237         set_focus(conn, client, true);
 238 }
 239
 240 /*
 241  * Pushes the client’s width/height to X11 and resizes the child window. This
 242  * function also updates the client’s position, so if you work on tiling clients
 243  * only, you can use this function instead of separate calls to reposition_client
 244  * and resize_client to reduce flickering.
 245  *
 246  */
 247 void resize_client(xcb_connection_t *conn, Client *client) {
 248         i3Font *font = load_font(conn, config.font);
 249
 250         DLOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 251         DLOG("resizing client 0x%08x to %d x %d\n", client->frame, client->rect.width, client->rect.height);
 252         xcb_set_window_rect(conn, client->frame, client->rect);
 253
 254         /* Adjust the position of the child inside its frame.
 255          * The coordinates of the child are relative to its frame, we
 256          * add a border of 2 pixel to each value */
 257         Rect *rect = &(client->child_rect);
 258         switch (container_mode(client->container, true)) {
 259                 case MODE_STACK:
 260                 case MODE_TABBED:
 261                         rect->x = 2;
 262                         rect->y = 0;
 263                         rect->width = client->rect.width - (2 + 2);
 264                         rect->height = client->rect.height - 2;
 265                         break;
 266                 default:
 267                         if (client->titlebar_position == TITLEBAR_OFF && client->borderless) {
 268                                 rect->x = 0;
 269                                 rect->y = 0;
 270                                 rect->width = client->rect.width;
 271                                 rect->height = client->rect.height;
 272                         } else if (client->titlebar_position == TITLEBAR_OFF && !client->borderless) {
 273                                 rect->x = 1;
 274                                 rect->y = 1;
 275                                 rect->width = client->rect.width - 1 - 1;
 276                                 rect->height = client->rect.height - 1 - 1;
 277                         } else {
 278                                 rect->x = 2;
 279                                 rect->y = font->height + 2 + 2;
 280                                 rect->width = client->rect.width - (2 + 2);
 281                                 rect->height = client->rect.height - ((font->height + 2 + 2) + 2);
 282                         }
 283                         break;
 284         }
 285
 286         rect->width -= (2 * client->border_width);
 287         rect->height -= (2 * client->border_width);
 288
 289         /* Obey the ratio, if any */
 290         if (client->proportional_height != 0 &&
 291             client->proportional_width != 0) {
 292                 DLOG("proportional height = %d, width = %d\n", client->proportional_height, client->proportional_width);
 293                 double new_height = rect->height + 1;
 294                 int new_width = rect->width;
 295
 296                 while (new_height > rect->height) {
 297                         new_height = ((double)client->proportional_height / client->proportional_width) * new_width;
 298
 299                         if (new_height > rect->height)
 300                                 new_width--;
 301                 }
 302                 /* Center the window */
 303                 rect->y += ceil(rect->height / 2) - floor(new_height / 2);
 304                 rect->x += ceil(rect->width / 2) - floor(new_width / 2);
 305
 306                 rect->height = new_height;
 307                 rect->width = new_width;
 308                 DLOG("new_height = %f, new_width = %d\n", new_height, new_width);
 309         }
 310
 311         if (client->height_increment > 1) {
 312                 int old_height = rect->height;
 313                 rect->height -= (rect->height - client->base_height) % client->height_increment;
 314                 DLOG("Lost %d pixel due to client's height_increment (%d px, base_height = %d)\n",
 315                     old_height - rect->height, client->height_increment, client->base_height);
 316         }
 317
 318         if (client->width_increment > 1) {
 319                 int old_width = rect->width;
 320                 rect->width -= (rect->width - client->base_width) % client->width_increment;
 321                 DLOG("Lost %d pixel due to client's width_increment (%d px, base_width = %d)\n",
 322                     old_width - rect->width, client->width_increment, client->base_width);
 323         }
 324
 325         DLOG("child will be at %dx%d with size %dx%d\n", rect->x, rect->y, rect->width, rect->height);
 326
 327         xcb_set_window_rect(conn, client->child, *rect);
 328
 329         /* After configuring a child window we need to fake a configure_notify_event (see ICCCM 4.2.3).
 330          * This is necessary to inform the client of its position relative to the root window,
 331          * not relative to its frame (as done in the configure_notify_event by the x server). */
 332         fake_absolute_configure_notify(conn, client);
 333
 334         /* Force redrawing after resizing the window because any now lost
 335          * pixels could contain old garbage. */
 336         xcb_expose_event_t generated;
 337         generated.window = client->frame;
 338         generated.count = 0;
 339         handle_expose_event(NULL, conn, &generated);
 340 }
 341
 342 /*
 343  * Renders the given container. Is called by render_layout() or individually (for example
 344  * when focus changes in a stacking container)
 345  *
 346  */
 347 void render_container(xcb_connection_t *conn, Container *container) {
 348         Client *client;
 349         int num_clients = 0, current_client = 0;
 350
 351         CIRCLEQ_FOREACH(client, &(container->clients), clients)
 352                 num_clients++;
 353
 354         if (container->mode == MODE_DEFAULT) {
 355                 int height = (container->height / max(1, num_clients));
 356                 int rest_pixels = (container->height % max(1, num_clients));
 357                 DLOG("height per client = %d, rest = %d\n", height, rest_pixels);
 358
 359                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 360                         /* If the client is in fullscreen mode, it does not get reconfigured */
 361                         if (container->workspace->fullscreen_client == client) {
 362                                 current_client++;
 363                                 continue;
 364                         }
 365
 366                         /* If we have some pixels left to distribute, add one
 367                          * pixel to each client as long as possible. */
 368                         int this_height = height;
 369                         if (rest_pixels > 0) {
 370                                 height++;
 371                                 rest_pixels--;
 372                         }
 373                         /* Check if we changed client->x or client->y by updating it.
 374                          * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 375                         if (client->force_reconfigure |
 376                             update_if_necessary(&(client->rect.x), container->x) |
 377                             update_if_necessary(&(client->rect.y), container->y +
 378                                         (container->height / num_clients) * current_client) |
 379                             update_if_necessary(&(client->rect.width), container->width) |
 380                             update_if_necessary(&(client->rect.height), this_height))
 381                                 resize_client(conn, client);
 382
 383                         /* TODO: vertical default layout */
 384
 385                         client->force_reconfigure = false;
 386
 387                         current_client++;
 388                 }
 389         } else {
 390                 i3Font *font = load_font(conn, config.font);
 391                 int decoration_height = (font->height + 2 + 2);
 392                 struct Stack_Window *stack_win = &(container->stack_win);
 393                 /* The size for each tab (width), necessary as a separate variable
 394                  * because num_clients gets fixed to 1 in tabbed mode. */
 395                 int size_each = (num_clients == 0 ? container->width : container->width / num_clients);
 396                 int stack_lines = num_clients;
 397
 398                 /* Check if we need to remap our stack title window, it gets unmapped when the container
 399                    is empty in src/handlers.c:unmap_notify() */
 400                 if (stack_win->rect.height == 0 && num_clients > 1) {
 401                         DLOG("remapping stack win\n");
 402                         xcb_map_window(conn, stack_win->window);
 403                 } else DLOG("not remapping stackwin, height = %d, num_clients = %d\n",
 404                                 stack_win->rect.height, num_clients);
 405
 406                 if (container->mode == MODE_TABBED) {
 407                         /* By setting num_clients to 1 we force that the stack window will be only one line
 408                          * high. The rest of the code is useful in both cases. */
 409                         DLOG("tabbed mode, setting num_clients = 1\n");
 410                         if (stack_lines > 1)
 411                                 stack_lines = 1;
 412                 }
 413
 414                 if (container->stack_limit == STACK_LIMIT_COLS) {
 415                         stack_lines = ceil((float)num_clients / container->stack_limit_value);
 416                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 417                         stack_lines = min(num_clients, container->stack_limit_value);
 418                 }
 419
 420                 int height = decoration_height * stack_lines;
 421                 if (num_clients == 1) {
 422                         height = 0;
 423                         stack_win->rect.height = 0;
 424                         xcb_unmap_window(conn, stack_win->window);
 425
 426                         DLOG("Just one client, setting height to %d\n", height);
 427                 }
 428
 429                 /* Check if we need to reconfigure our stack title window */
 430                 if (height > 0 && (
 431                      update_if_necessary(&(stack_win->rect.x), container->x) |
 432                      update_if_necessary(&(stack_win->rect.y), container->y) |
 433                      update_if_necessary(&(stack_win->rect.width), container->width) |
 434                      update_if_necessary(&(stack_win->rect.height), height))) {
 435
 436                         /* Configuration can happen in two slightly different ways:
 437
 438                            If there is no client in fullscreen mode, 5 parameters are passed
 439                            (x, y, width, height, stack mode is set to above which means top-most position).
 440
 441                            If there is a fullscreen client, the fourth parameter is set to to the
 442                            fullscreen window as sibling and the stack mode is set to below, which means
 443                            that the stack_window will be placed just below the sibling, that is, under
 444                            the fullscreen window.
 445                          */
 446                         uint32_t values[] = { stack_win->rect.x, stack_win->rect.y,
 447                                               stack_win->rect.width, stack_win->rect.height,
 448                                               XCB_STACK_MODE_ABOVE, XCB_STACK_MODE_BELOW };
 449                         uint32_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
 450                                         XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT |
 451                                         XCB_CONFIG_WINDOW_STACK_MODE;
 452
 453                         /* Raise the stack window, but keep it below the first floating client
 454                          * and below the fullscreen client (if any) */
 455                         Client *first_floating = TAILQ_FIRST(&(container->workspace->floating_clients));
 456                         if (container->workspace->fullscreen_client != NULL) {
 457                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 458                                 values[4] = container->workspace->fullscreen_client->frame;
 459                         } else if (first_floating != TAILQ_END(&(container->workspace->floating_clients))) {
 460                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 461                                 values[4] = first_floating->frame;
 462                         }
 463
 464                         xcb_configure_window(conn, stack_win->window, mask, values);
 465                 }
 466
 467                 /* Prepare the pixmap for usage */
 468                 if (num_clients > 1)
 469                         cached_pixmap_prepare(conn, &(stack_win->pixmap));
 470
 471                 int current_row = 0, current_col = 0;
 472                 int wrap = 0;
 473
 474                 if (container->stack_limit == STACK_LIMIT_COLS) {
 475                         /* wrap stores the number of rows after which we will
 476                          * wrap to a new column. */
 477                         wrap = ceil((float)num_clients / container->stack_limit_value);
 478                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 479                         /* When limiting rows, the wrap variable serves a
 480                          * slightly different purpose: it holds the number of
 481                          * pixels which each client will get. This is constant
 482                          * during the following loop, so it saves us some
 483                          * divisions and ceil()ing. */
 484                         wrap = (stack_win->rect.width / ceil((float)num_clients / container->stack_limit_value));
 485                 }
 486
 487                 /* Render the decorations of all clients */
 488                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 489                         /* If the client is in fullscreen mode, it does not get reconfigured */
 490                         if (container->workspace->fullscreen_client == client) {
 491                                 current_client++;
 492                                 continue;
 493                         }
 494
 495                         /* Check if we changed client->x or client->y by updating it.
 496                          * Note the bitwise OR instead of logical OR to force evaluation of all statements */
 497                         if (client->force_reconfigure |
 498                             update_if_necessary(&(client->rect.x), container->x) |
 499                             update_if_necessary(&(client->rect.y), container->y + height) |
 500                             update_if_necessary(&(client->rect.width), container->width) |
 501                             update_if_necessary(&(client->rect.height), container->height - height))
 502                                 resize_client(conn, client);
 503
 504                         client->force_reconfigure = false;
 505
 506                         int offset_x = 0;
 507                         int offset_y = 0;
 508                         if (container->mode == MODE_STACK ||
 509                             (container->mode == MODE_TABBED &&
 510                              container->stack_limit == STACK_LIMIT_COLS)) {
 511                                 if (container->stack_limit == STACK_LIMIT_COLS) {
 512                                         offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 513                                         offset_y = current_row * decoration_height;
 514                                         current_row++;
 515                                         if ((current_row % wrap) == 0) {
 516                                                 current_col++;
 517                                                 current_row = 0;
 518                                         }
 519                                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 520                                         offset_x = current_col * wrap;
 521                                         offset_y = current_row * decoration_height;
 522                                         current_row++;
 523                                         if ((current_row % container->stack_limit_value) == 0) {
 524                                                 current_col++;
 525                                                 current_row = 0;
 526                                         }
 527                                 } else {
 528                                         offset_y = current_client * decoration_height;
 529                                 }
 530                                 current_client++;
 531                         } else if (container->mode == MODE_TABBED) {
 532                                 if (container->stack_limit == STACK_LIMIT_ROWS) {
 533                                         LOG("You limited a tabbed container in its rows. "
 534                                             "This makes no sense in tabbing mode.\n");
 535                                 }
 536                                 offset_x = current_client++ * size_each;
 537                         }
 538                         if (stack_win->pixmap.id != XCB_NONE)
 539                                 decorate_window(conn, client, stack_win->pixmap.id,
 540                                                 stack_win->pixmap.gc, offset_x, offset_y);
 541                         else
 542                                 decorate_window(conn, client, client->frame, client->titlegc, 0, 0);
 543                 }
 544
 545                 /* Check if we need to fill one column because of an uneven
 546                  * amount of windows */
 547                 if (container->mode == MODE_STACK) {
 548                         if (container->stack_limit == STACK_LIMIT_COLS && (current_col % 2) != 0) {
 549                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, config.client.background);
 550
 551                                 int offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 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                         } else if (container->stack_limit == STACK_LIMIT_ROWS && (current_row % 2) != 0) {
 558                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, config.client.background);
 559
 560                                 int offset_x = current_col * wrap;
 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                         }
 567                 }
 568
 569                 if (stack_win->pixmap.id == XCB_NONE)
 570                         return;
 571                 xcb_copy_area(conn, stack_win->pixmap.id, stack_win->window, stack_win->pixmap.gc,
 572                               0, 0, 0, 0, stack_win->rect.width, stack_win->rect.height);
 573         }
 574 }
 575
 576 static void render_bars(xcb_connection_t *conn, Workspace *r_ws, int width, int *height) {
 577         Client *client;
 578         SLIST_FOREACH(client, &(r_ws->output->dock_clients), dock_clients) {
 579                 DLOG("client is at %d, should be at %d\n", client->rect.y, *height);
 580                 if (client->force_reconfigure |
 581                     update_if_necessary(&(client->rect.x), r_ws->rect.x) |
 582                     update_if_necessary(&(client->rect.y), *height))
 583                         reposition_client(conn, client);
 584
 585                 if (client->force_reconfigure |
 586                     update_if_necessary(&(client->rect.width), width) |
 587                     update_if_necessary(&(client->rect.height), client->desired_height))
 588                         resize_client(conn, client);
 589
 590                 client->force_reconfigure = false;
 591                 DLOG("desired_height = %d\n", client->desired_height);
 592                 *height += client->desired_height;
 593         }
 594 }
 595
 596 static void render_internal_bar(xcb_connection_t *conn, Workspace *r_ws, int width, int height) {
 597         i3Font *font = load_font(conn, config.font);
 598         Output *output = r_ws->output;
 599         enum { SET_NORMAL = 0, SET_FOCUSED = 1 };
 600
 601         /* Fill the whole bar in black */
 602         xcb_change_gc_single(conn, output->bargc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 603         xcb_rectangle_t rect = {0, 0, width, height};
 604         xcb_poly_fill_rectangle(conn, output->bar, output->bargc, 1, &rect);
 605
 606         /* Set font */
 607         xcb_change_gc_single(conn, output->bargc, XCB_GC_FONT, font->id);
 608
 609         int drawn = 0;
 610         Workspace *ws;
 611         TAILQ_FOREACH(ws, workspaces, workspaces) {
 612                 if (ws->output != output)
 613                         continue;
 614
 615                 struct Colortriple *color;
 616
 617                 if (output->current_workspace == ws)
 618                         color = &(config.bar.focused);
 619                 else if (ws->urgent)
 620                         color = &(config.bar.urgent);
 621                 else color = &(config.bar.unfocused);
 622
 623                 /* Draw the outer rect */
 624                 xcb_draw_rect(conn, output->bar, output->bargc, color->border,
 625                               drawn,              /* x */
 626                               1,                  /* y */
 627                               ws->text_width + 5 + 5, /* width = text width + 5 px left + 5px right */
 628                               height - 2          /* height = max. height - 1 px upper and 1 px bottom border */);
 629
 630                 /* Draw the background of this rect */
 631                 xcb_draw_rect(conn, output->bar, output->bargc, color->background,
 632                               drawn + 1,
 633                               2,
 634                               ws->text_width + 4 + 4,
 635                               height - 4);
 636
 637                 xcb_change_gc_single(conn, output->bargc, XCB_GC_FOREGROUND, color->text);
 638                 xcb_change_gc_single(conn, output->bargc, XCB_GC_BACKGROUND, color->background);
 639                 xcb_image_text_16(conn, ws->name_len, output->bar, output->bargc, drawn + 5 /* X */,
 640                                   font->height + 1 /* Y = baseline of font */,
 641                                   (xcb_char2b_t*)ws->name);
 642                 drawn += ws->text_width + 12;
 643         }
 644 }
 645
 646 /*
 647  * Modifies the event mask of all clients on the given workspace to either ignore or to handle
 648  * enter notifies. It is handy to ignore notifies because they will be sent when a window is mapped
 649  * under the cursor, thus when the user didn’t enter the window actively at all.
 650  *
 651  */
 652 void ignore_enter_notify_forall(xcb_connection_t *conn, Workspace *workspace, bool ignore_enter_notify) {
 653         Client *client;
 654         uint32_t values[1];
 655
 656         FOR_TABLE(workspace) {
 657                 if (workspace->table[cols][rows] == NULL)
 658                         continue;
 659
 660                 CIRCLEQ_FOREACH(client, &(workspace->table[cols][rows]->clients), clients) {
 661                         /* Change event mask for the decorations */
 662                         values[0] = FRAME_EVENT_MASK;
 663                         if (ignore_enter_notify)
 664                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 665                         xcb_change_window_attributes(conn, client->frame, XCB_CW_EVENT_MASK, values);
 666
 667                         /* Change event mask for the child itself */
 668                         values[0] = CHILD_EVENT_MASK;
 669                         if (ignore_enter_notify)
 670                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 671                         xcb_change_window_attributes(conn, client->child, XCB_CW_EVENT_MASK, values);
 672                 }
 673         }
 674 }
 675
 676 /*
 677  * Renders the given workspace on the given screen
 678  *
 679  */
 680 void render_workspace(xcb_connection_t *conn, Output *output, Workspace *r_ws) {
 681         i3Font *font = load_font(conn, config.font);
 682         int width = r_ws->rect.width;
 683         int height = r_ws->rect.height;
 684
 685         /* Reserve space for dock clients */
 686         Client *client;
 687         SLIST_FOREACH(client, &(output->dock_clients), dock_clients)
 688                 height -= client->desired_height;
 689
 690         /* Space for the internal bar */
 691         if (!config.disable_workspace_bar)
 692                 height -= (font->height + 6);
 693
 694         int xoffset[r_ws->rows];
 695         int yoffset[r_ws->cols];
 696         /* Initialize offsets */
 697         for (int cols = 0; cols < r_ws->cols; cols++)
 698                 yoffset[cols] = r_ws->rect.y;
 699         for (int rows = 0; rows < r_ws->rows; rows++)
 700                 xoffset[rows] = r_ws->rect.x;
 701
 702         ignore_enter_notify_forall(conn, r_ws, true);
 703
 704         /* Get the width of the cols */
 705         int col_width[r_ws->cols];
 706         int unoccupied_x = get_unoccupied_x(r_ws);
 707         int default_col_width = unoccupied_x / r_ws->cols;
 708         int total_col_width = 0;
 709         for (int i = 0; i < r_ws->cols; ++i) {
 710                 col_width[i] = r_ws->width_factor[i] == 0 ? default_col_width : unoccupied_x * r_ws->width_factor[i];
 711                 total_col_width += col_width[i];
 712         }
 713
 714         /* Correct rounding errors */
 715         int error = r_ws->rect.width - total_col_width, error_index = r_ws->cols - 1;
 716         while (error) {
 717                 ++col_width[error_index];
 718                 --error;
 719                 error_index = error_index == 0 ? r_ws->cols - 1 : error_index - 1;
 720         }
 721
 722         /* Get the height of the rows */
 723         int row_height[r_ws->rows];
 724         int unoccupied_y = get_unoccupied_y(r_ws);
 725         int default_row_height = unoccupied_y / r_ws->rows;
 726         int total_row_height = 0;
 727         for (int i = 0; i < r_ws->rows; ++i) {
 728                 row_height[i] = r_ws->height_factor[i] == 0 ? default_row_height : unoccupied_y * r_ws->height_factor[i];
 729                 total_row_height += row_height[i];
 730         }
 731
 732         /* Correct rounding errors */
 733         error = workspace_height(r_ws) - total_row_height;
 734         error_index = r_ws->rows - 1;
 735         while (error) {
 736                 ++row_height[error_index];
 737                 --error;
 738                 error_index = error_index == 0 ? r_ws->rows - 1 : error_index - 1;
 739         }
 740
 741         /* Go through the whole table and render what’s necessary */
 742         FOR_TABLE(r_ws) {
 743                 Container *container = r_ws->table[cols][rows];
 744                 if (container == NULL)
 745                         continue;
 746                 int single_width = -1, single_height = -1;
 747                 /* Update position of the container */
 748                 container->row = rows;
 749                 container->col = cols;
 750                 container->x = xoffset[rows];
 751                 container->y = yoffset[cols];
 752                 container->width = 0;
 753
 754                 for (int c = 0; c < container->colspan; c++) {
 755                         container->width += col_width[cols + c];
 756                         if (single_width == -1)
 757                                 single_width = container->width;
 758                 }
 759
 760                 DLOG("height is %d\n", height);
 761
 762                 container->height = 0;
 763
 764                 for (int c = 0; c < container->rowspan; c++) {
 765                         container->height += row_height[rows + c];
 766                         if (single_height == -1)
 767                                 single_height = container->height;
 768                 }
 769
 770                 /* Render the container if it is not empty */
 771                 render_container(conn, container);
 772
 773                 xoffset[rows] += single_width;
 774                 yoffset[cols] += single_height;
 775         }
 776
 777         /* Reposition all floating clients with force_reconfigure == true */
 778         TAILQ_FOREACH(client, &(r_ws->floating_clients), floating_clients) {
 779                 if (!client->force_reconfigure)
 780                         continue;
 781
 782                 client->force_reconfigure = false;
 783                 reposition_client(conn, client);
 784                 resize_client(conn, client);
 785         }
 786
 787         ignore_enter_notify_forall(conn, r_ws, false);
 788
 789         render_bars(conn, r_ws, width, &height);
 790         if (!config.disable_workspace_bar)
 791                 render_internal_bar(conn, r_ws, width, font->height + 6);
 792 }
 793
 794 /*
 795  * Renders the whole layout, that is: Go through each screen, each workspace, each container
 796  * and render each client. This also renders the bars.
 797  *
 798  * If you don’t need to render *everything*, you should call render_container on the container
 799  * you want to refresh.
 800  *
 801  */
 802 void render_layout(xcb_connection_t *conn) {
 803         Output *output;
 804
 805         TAILQ_FOREACH(output, &outputs, outputs)
 806                 if (output->current_workspace != NULL)
 807                         render_workspace(conn, output, output->current_workspace);
 808
 809         xcb_flush(conn);
 810 }