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  * Gets the unoccupied space (= space which is available for windows which were resized by the user)
  36  * for the given row. This is necessary to render both, customly resized windows and never touched
  37  * windows correctly, meaning that the aspect ratio will be maintained when opening new windows.
  38  *
  39  */
  40 int get_unoccupied_x(Workspace *workspace) {
  41         double unoccupied = workspace->rect.width;
  42         double default_factor = ((float)workspace->rect.width / workspace->cols) / workspace->rect.width;
  43
  44         DLOG("get_unoccupied_x(), starting with %f, default_factor = %f\n", unoccupied, default_factor);
  45
  46         for (int cols = 0; cols < workspace->cols; cols++) {
  47                 DLOG("width_factor[%d] = %f, unoccupied = %f\n", cols, workspace->width_factor[cols], unoccupied);
  48
  49                 if (workspace->width_factor[cols] == 0)
  50                         unoccupied -= workspace->rect.width * default_factor;
  51         }
  52
  53         DLOG("unoccupied space: %f\n", unoccupied);
  54         return unoccupied;
  55 }
  56
  57 /* See get_unoccupied_x() */
  58 int get_unoccupied_y(Workspace *workspace) {
  59         int height = workspace_height(workspace);
  60         double unoccupied = height;
  61         double default_factor = ((float)height / workspace->rows) / height;
  62
  63         DLOG("get_unoccupied_y(), starting with %f, default_factor = %f\n", unoccupied, default_factor);
  64
  65         for (int rows = 0; rows < workspace->rows; rows++) {
  66                 DLOG("height_factor[%d] = %f, unoccupied = %f\n", rows, workspace->height_factor[rows], unoccupied);
  67                 if (workspace->height_factor[rows] == 0)
  68                         unoccupied -= height * default_factor;
  69         }
  70
  71         DLOG("unoccupied space: %f\n", unoccupied);
  72         return unoccupied;
  73 }
  74
  75 /*
  76  * Redecorates the given client correctly by checking if it’s in a stacking container and
  77  * re-rendering the stack window or just calling decorate_window if it’s not in a stacking
  78  * container.
  79  *
  80  */
  81 void redecorate_window(xcb_connection_t *conn, Client *client) {
  82         if (client->container != NULL &&
  83             (client->container->mode == MODE_STACK ||
  84              client->container->mode == MODE_TABBED)) {
  85                 render_container(conn, client->container);
  86                 /* We clear the frame to generate exposure events, because the color used
  87                    in drawing may be different */
  88                 xcb_clear_area(conn, true, client->frame, 0, 0, client->rect.width, client->rect.height);
  89         } else decorate_window(conn, client, client->frame, client->titlegc, 0, 0);
  90         xcb_flush(conn);
  91 }
  92
  93 /*
  94  * (Re-)draws window decorations for a given Client onto the given drawable/graphic context.
  95  * When in stacking mode, the window decorations are drawn onto an own window.
  96  *
  97  */
  98 void decorate_window(xcb_connection_t *conn, Client *client, xcb_drawable_t drawable,
  99                      xcb_gcontext_t gc, int offset_x, int offset_y) {
 100         i3Font *font = load_font(conn, config.font);
 101         int decoration_height = font->height + 2 + 2;
 102         struct Colortriple *color;
 103         Client *last_focused;
 104
 105         /* Clients without a container (docks) won’t get decorated */
 106         if (client->dock)
 107                 return;
 108
 109         last_focused = SLIST_FIRST(&(client->workspace->focus_stack));
 110         /* Is the window urgent? */
 111         if (client->urgent)
 112                 color = &(config.client.urgent);
 113         else {
 114                 if (client_is_floating(client)) {
 115                         if (last_focused == client)
 116                                 color = &(config.client.focused);
 117                         else color = &(config.client.unfocused);
 118                 } else {
 119                         if (client->container->currently_focused == client) {
 120                                 /* Distinguish if the window is currently focused… */
 121                                 if (last_focused == client && c_ws == client->workspace)
 122                                         color = &(config.client.focused);
 123                                 /* …or if it is the focused window in a not focused container */
 124                                 else color = &(config.client.focused_inactive);
 125                         } else color = &(config.client.unfocused);
 126                 }
 127         }
 128
 129         /* Our plan is the following:
 130            - Draw a rect around the whole client in color->background
 131            - Draw two lines in a lighter color
 132            - Draw the window’s title
 133          */
 134         int mode = container_mode(client->container, true);
 135
 136         /* Draw a rectangle in background color around the window */
 137         if (client->borderless && mode == MODE_DEFAULT)
 138                 xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 139         else xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, color->background);
 140
 141         /* In stacking mode, we only render the rect for this specific decoration */
 142         if (mode == MODE_STACK || mode == MODE_TABBED) {
 143                 /* We need to use the container’s width because it is the more recent value - when
 144                    in stacking mode, clients get reconfigured only on demand (the not active client
 145                    is not reconfigured), so the client’s rect.width would be wrong */
 146                 xcb_rectangle_t rect = {offset_x, offset_y,
 147                                         offset_x + client->container->width,
 148                                         offset_y + decoration_height };
 149                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 150         } else {
 151                 xcb_rectangle_t rect = {0, 0, client->rect.width, client->rect.height};
 152                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 153
 154                 /* Draw the inner background to have a black frame around clients (such as mplayer)
 155                    which cannot be resized exactly in our frames and therefore are centered */
 156                 xcb_change_gc_single(conn, client->titlegc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 157                 if (client->titlebar_position == TITLEBAR_OFF && client->borderless) {
 158                         xcb_rectangle_t crect = {0, 0, client->rect.width, client->rect.height};
 159                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 160                 } else if (client->titlebar_position == TITLEBAR_OFF && !client->borderless) {
 161                         xcb_rectangle_t crect = {1, 1, client->rect.width - (1 + 1), client->rect.height - (1 + 1)};
 162                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 163                 } else {
 164                         xcb_rectangle_t crect = {2, decoration_height,
 165                                                  client->rect.width - (2 + 2), client->rect.height - 2 - decoration_height};
 166                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 167                 }
 168         }
 169
 170         mode = container_mode(client->container, false);
 171
 172         if (client->titlebar_position != TITLEBAR_OFF) {
 173                 /* Draw the lines */
 174                 xcb_draw_line(conn, drawable, gc, color->border, offset_x, offset_y, offset_x + client->rect.width, offset_y);
 175                 if (mode == MODE_DEFAULT ||
 176                     CIRCLEQ_NEXT_OR_NULL(&(client->container->clients), client, clients) == NULL)
 177                         xcb_draw_line(conn, drawable, gc, color->border,
 178                                       offset_x + 2, /* x */
 179                                       offset_y + font->height + 3, /* y */
 180                                       offset_x + client->rect.width - 3, /* to_x */
 181                                       offset_y + font->height + 3 /* to_y */);
 182         }
 183
 184         /* If the client has a title, we draw it */
 185         if (client->name != NULL &&
 186             (mode != MODE_DEFAULT || client->titlebar_position != TITLEBAR_OFF)) {
 187                 /* Draw the font */
 188                 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
 189                 uint32_t values[] = { color->text, color->background, font->id };
 190                 xcb_change_gc(conn, gc, mask, values);
 191
 192                 /* name_len == -1 means this is a legacy application which does not specify _NET_WM_NAME,
 193                    and we don’t handle the old window name (COMPOUND_TEXT) but only _NET_WM_NAME, which
 194                    is UTF-8 */
 195                 if (client->name_len == -1)
 196                         xcb_image_text_8(conn, strlen(client->name), drawable, gc, offset_x + 3 /* X */,
 197                                          offset_y + font->height /* Y = baseline of font */, client->name);
 198                 else
 199                         xcb_image_text_16(conn, client->name_len, drawable, gc, offset_x + 3 /* X */,
 200                                           offset_y + font->height /* Y = baseline of font */, (xcb_char2b_t*)client->name);
 201         }
 202 }
 203
 204 /*
 205  * Pushes the client’s x and y coordinates to X11
 206  *
 207  */
 208 void reposition_client(xcb_connection_t *conn, Client *client) {
 209         i3Screen *screen;
 210
 211         DLOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 212         /* Note: We can use a pointer to client->x like an array of uint32_ts
 213            because it is followed by client->y by definition */
 214         xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
 215
 216         if (!client_is_floating(client))
 217                 return;
 218
 219         /* If the client is floating, we need to check if we moved it to a different workspace */
 220         screen = get_screen_containing(client->rect.x + (client->rect.width / 2),
 221                                        client->rect.y + (client->rect.height / 2));
 222         if (client->workspace->screen == screen)
 223                 return;
 224
 225         if (screen == NULL) {
 226                 DLOG("Boundary checking disabled, no screen found for (%d, %d)\n", client->rect.x, client->rect.y);
 227                 return;
 228         }
 229
 230         DLOG("Client is on workspace %p with screen %p\n", client->workspace, client->workspace->screen);
 231         DLOG("but screen at %d, %d is %p\n", client->rect.x, client->rect.y, screen);
 232         floating_assign_to_workspace(client, screen->current_workspace);
 233
 234         set_focus(conn, client, true);
 235 }
 236
 237 /*
 238  * Pushes the client’s width/height to X11 and resizes the child window. This
 239  * function also updates the client’s position, so if you work on tiling clients
 240  * only, you can use this function instead of separate calls to reposition_client
 241  * and resize_client to reduce flickering.
 242  *
 243  */
 244 void resize_client(xcb_connection_t *conn, Client *client) {
 245         i3Font *font = load_font(conn, config.font);
 246
 247         DLOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 248         DLOG("resizing client 0x%08x to %d x %d\n", client->frame, client->rect.width, client->rect.height);
 249         xcb_configure_window(conn, client->frame,
 250                         XCB_CONFIG_WINDOW_X |
 251                         XCB_CONFIG_WINDOW_Y |
 252                         XCB_CONFIG_WINDOW_WIDTH |
 253                         XCB_CONFIG_WINDOW_HEIGHT,
 254                         &(client->rect.x));
 255
 256         /* Adjust the position of the child inside its frame.
 257          * The coordinates of the child are relative to its frame, we
 258          * add a border of 2 pixel to each value */
 259         uint32_t mask = XCB_CONFIG_WINDOW_X |
 260                         XCB_CONFIG_WINDOW_Y |
 261                         XCB_CONFIG_WINDOW_WIDTH |
 262                         XCB_CONFIG_WINDOW_HEIGHT;
 263         Rect *rect = &(client->child_rect);
 264         switch (container_mode(client->container, true)) {
 265                 case MODE_STACK:
 266                 case MODE_TABBED:
 267                         rect->x = 2;
 268                         rect->y = 0;
 269                         rect->width = client->rect.width - (2 + 2);
 270                         rect->height = client->rect.height - 2;
 271                         break;
 272                 default:
 273                         if (client->titlebar_position == TITLEBAR_OFF && client->borderless) {
 274                                 rect->x = 0;
 275                                 rect->y = 0;
 276                                 rect->width = client->rect.width;
 277                                 rect->height = client->rect.height;
 278                         } else if (client->titlebar_position == TITLEBAR_OFF && !client->borderless) {
 279                                 rect->x = 1;
 280                                 rect->y = 1;
 281                                 rect->width = client->rect.width - 1 - 1;
 282                                 rect->height = client->rect.height - 1 - 1;
 283                         } else {
 284                                 rect->x = 2;
 285                                 rect->y = font->height + 2 + 2;
 286                                 rect->width = client->rect.width - (2 + 2);
 287                                 rect->height = client->rect.height - ((font->height + 2 + 2) + 2);
 288                         }
 289                         break;
 290         }
 291
 292         rect->width -= (2 * client->border_width);
 293         rect->height -= (2 * client->border_width);
 294
 295         /* Obey the ratio, if any */
 296         if (client->proportional_height != 0 &&
 297             client->proportional_width != 0) {
 298                 DLOG("proportional height = %d, width = %d\n", client->proportional_height, client->proportional_width);
 299                 double new_height = rect->height + 1;
 300                 int new_width = rect->width;
 301
 302                 while (new_height > rect->height) {
 303                         new_height = ((double)client->proportional_height / client->proportional_width) * new_width;
 304
 305                         if (new_height > rect->height)
 306                                 new_width--;
 307                 }
 308                 /* Center the window */
 309                 rect->y += ceil(rect->height / 2) - floor(new_height / 2);
 310                 rect->x += ceil(rect->width / 2) - floor(new_width / 2);
 311
 312                 rect->height = new_height;
 313                 rect->width = new_width;
 314                 DLOG("new_height = %f, new_width = %d\n", new_height, new_width);
 315         }
 316
 317         if (client->height_increment > 1) {
 318                 int old_height = rect->height;
 319                 rect->height -= (rect->height - client->base_height) % client->height_increment;
 320                 DLOG("Lost %d pixel due to client's height_increment (%d px, base_height = %d)\n",
 321                     old_height - rect->height, client->height_increment, client->base_height);
 322         }
 323
 324         if (client->width_increment > 1) {
 325                 int old_width = rect->width;
 326                 rect->width -= (rect->width - client->base_width) % client->width_increment;
 327                 DLOG("Lost %d pixel due to client's width_increment (%d px, base_width = %d)\n",
 328                     old_width - rect->width, client->width_increment, client->base_width);
 329         }
 330
 331         DLOG("child will be at %dx%d with size %dx%d\n", rect->x, rect->y, rect->width, rect->height);
 332
 333         xcb_configure_window(conn, client->child, mask, &(rect->x));
 334
 335         /* After configuring a child window we need to fake a configure_notify_event (see ICCCM 4.2.3).
 336          * This is necessary to inform the client of its position relative to the root window,
 337          * not relative to its frame (as done in the configure_notify_event by the x server). */
 338         fake_absolute_configure_notify(conn, client);
 339
 340         /* Force redrawing after resizing the window because any now lost
 341          * pixels could contain old garbage. */
 342         xcb_expose_event_t generated;
 343         generated.window = client->frame;
 344         generated.count = 0;
 345         handle_expose_event(NULL, conn, &generated);
 346 }
 347
 348 /*
 349  * Renders the given container. Is called by render_layout() or individually (for example
 350  * when focus changes in a stacking container)
 351  *
 352  */
 353 void render_container(xcb_connection_t *conn, Container *container) {
 354         Client *client;
 355         int num_clients = 0, current_client = 0;
 356
 357         CIRCLEQ_FOREACH(client, &(container->clients), clients)
 358                 num_clients++;
 359
 360         if (container->mode == MODE_DEFAULT) {
 361                 int height = (container->height / max(1, num_clients));
 362                 int rest_pixels = (container->height % max(1, num_clients));
 363                 DLOG("height per client = %d, rest = %d\n", height, rest_pixels);
 364
 365                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 366                         /* If the client is in fullscreen mode, it does not get reconfigured */
 367                         if (container->workspace->fullscreen_client == client) {
 368                                 current_client++;
 369                                 continue;
 370                         }
 371
 372                         /* If we have some pixels left to distribute, add one
 373                          * pixel to each client as long as possible. */
 374                         int this_height = height;
 375                         if (rest_pixels > 0) {
 376                                 height++;
 377                                 rest_pixels--;
 378                         }
 379                         /* Check if we changed client->x or client->y by updating it.
 380                          * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 381                         if (client->force_reconfigure |
 382                             update_if_necessary(&(client->rect.x), container->x) |
 383                             update_if_necessary(&(client->rect.y), container->y +
 384                                         (container->height / num_clients) * current_client) |
 385                             update_if_necessary(&(client->rect.width), container->width) |
 386                             update_if_necessary(&(client->rect.height), this_height))
 387                                 resize_client(conn, client);
 388
 389                         /* TODO: vertical default layout */
 390
 391                         client->force_reconfigure = false;
 392
 393                         current_client++;
 394                 }
 395         } else {
 396                 i3Font *font = load_font(conn, config.font);
 397                 int decoration_height = (font->height + 2 + 2);
 398                 struct Stack_Window *stack_win = &(container->stack_win);
 399                 /* The size for each tab (width), necessary as a separate variable
 400                  * because num_clients gets fixed to 1 in tabbed mode. */
 401                 int size_each = (num_clients == 0 ? container->width : container->width / num_clients);
 402                 int stack_lines = num_clients;
 403
 404                 /* Check if we need to remap our stack title window, it gets unmapped when the container
 405                    is empty in src/handlers.c:unmap_notify() */
 406                 if (stack_win->rect.height == 0 && num_clients > 1) {
 407                         DLOG("remapping stack win\n");
 408                         xcb_map_window(conn, stack_win->window);
 409                 } else DLOG("not remapping stackwin, height = %d, num_clients = %d\n",
 410                                 stack_win->rect.height, num_clients);
 411
 412                 if (container->mode == MODE_TABBED) {
 413                         /* By setting num_clients to 1 we force that the stack window will be only one line
 414                          * high. The rest of the code is useful in both cases. */
 415                         DLOG("tabbed mode, setting num_clients = 1\n");
 416                         if (stack_lines > 1)
 417                                 stack_lines = 1;
 418                 }
 419
 420                 if (container->stack_limit == STACK_LIMIT_COLS) {
 421                         stack_lines = ceil((float)num_clients / container->stack_limit_value);
 422                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 423                         stack_lines = min(num_clients, container->stack_limit_value);
 424                 }
 425
 426                 int height = decoration_height * stack_lines;
 427                 if (num_clients == 1) {
 428                         height = 0;
 429                         stack_win->rect.height = 0;
 430                         xcb_unmap_window(conn, stack_win->window);
 431
 432                         DLOG("Just one client, setting height to %d\n", height);
 433                 }
 434
 435                 /* Check if we need to reconfigure our stack title window */
 436                 if (height > 0 && (
 437                      update_if_necessary(&(stack_win->rect.x), container->x) |
 438                      update_if_necessary(&(stack_win->rect.y), container->y) |
 439                      update_if_necessary(&(stack_win->rect.width), container->width) |
 440                      update_if_necessary(&(stack_win->rect.height), height))) {
 441
 442                         /* Configuration can happen in two slightly different ways:
 443
 444                            If there is no client in fullscreen mode, 5 parameters are passed
 445                            (x, y, width, height, stack mode is set to above which means top-most position).
 446
 447                            If there is a fullscreen client, the fourth parameter is set to to the
 448                            fullscreen window as sibling and the stack mode is set to below, which means
 449                            that the stack_window will be placed just below the sibling, that is, under
 450                            the fullscreen window.
 451                          */
 452                         uint32_t values[] = { stack_win->rect.x, stack_win->rect.y,
 453                                               stack_win->rect.width, stack_win->rect.height,
 454                                               XCB_STACK_MODE_ABOVE, XCB_STACK_MODE_BELOW };
 455                         uint32_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
 456                                         XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT |
 457                                         XCB_CONFIG_WINDOW_STACK_MODE;
 458
 459                         /* Raise the stack window, but keep it below the first floating client
 460                          * and below the fullscreen client (if any) */
 461                         Client *first_floating = TAILQ_FIRST(&(container->workspace->floating_clients));
 462                         if (first_floating != TAILQ_END(&(container->workspace->floating_clients))) {
 463                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 464                                 values[4] = first_floating->frame;
 465                         } else if (container->workspace->fullscreen_client != NULL) {
 466                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 467                                 values[4] = container->workspace->fullscreen_client->frame;
 468                         }
 469
 470                         xcb_configure_window(conn, stack_win->window, mask, values);
 471                 }
 472
 473                 /* Prepare the pixmap for usage */
 474                 cached_pixmap_prepare(conn, &(stack_win->pixmap));
 475
 476                 int current_row = 0, current_col = 0;
 477                 int wrap = 0;
 478
 479                 if (container->stack_limit == STACK_LIMIT_COLS) {
 480                         /* wrap stores the number of rows after which we will
 481                          * wrap to a new column. */
 482                         wrap = ceil((float)num_clients / container->stack_limit_value);
 483                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 484                         /* When limiting rows, the wrap variable serves a
 485                          * slightly different purpose: it holds the number of
 486                          * pixels which each client will get. This is constant
 487                          * during the following loop, so it saves us some
 488                          * divisions and ceil()ing. */
 489                         wrap = (stack_win->rect.width / ceil((float)num_clients / container->stack_limit_value));
 490                 }
 491
 492                 /* Render the decorations of all clients */
 493                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 494                         /* If the client is in fullscreen mode, it does not get reconfigured */
 495                         if (container->workspace->fullscreen_client == client) {
 496                                 current_client++;
 497                                 continue;
 498                         }
 499
 500                         /* Check if we changed client->x or client->y by updating it.
 501                          * Note the bitwise OR instead of logical OR to force evaluation of all statements */
 502                         if (client->force_reconfigure |
 503                             update_if_necessary(&(client->rect.x), container->x) |
 504                             update_if_necessary(&(client->rect.y), container->y + height) |
 505                             update_if_necessary(&(client->rect.width), container->width) |
 506                             update_if_necessary(&(client->rect.height), container->height - height))
 507                                 resize_client(conn, client);
 508
 509                         client->force_reconfigure = false;
 510
 511                         int offset_x = 0;
 512                         int offset_y = 0;
 513                         if (container->mode == MODE_STACK ||
 514                             (container->mode == MODE_TABBED &&
 515                              container->stack_limit == STACK_LIMIT_COLS)) {
 516                                 if (container->stack_limit == STACK_LIMIT_COLS) {
 517                                         offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 518                                         offset_y = current_row * decoration_height;
 519                                         current_row++;
 520                                         if ((current_row % wrap) == 0) {
 521                                                 current_col++;
 522                                                 current_row = 0;
 523                                         }
 524                                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 525                                         offset_x = current_col * wrap;
 526                                         offset_y = current_row * decoration_height;
 527                                         current_row++;
 528                                         if ((current_row % container->stack_limit_value) == 0) {
 529                                                 current_col++;
 530                                                 current_row = 0;
 531                                         }
 532                                 } else {
 533                                         offset_y = current_client * decoration_height;
 534                                 }
 535                                 current_client++;
 536                         } else if (container->mode == MODE_TABBED) {
 537                                 if (container->stack_limit == STACK_LIMIT_ROWS) {
 538                                         LOG("You limited a tabbed container in its rows. "
 539                                             "This makes no sense in tabbing mode.\n");
 540                                 }
 541                                 offset_x = current_client++ * size_each;
 542                         }
 543                         decorate_window(conn, client, stack_win->pixmap.id, stack_win->pixmap.gc,
 544                                         offset_x, offset_y);
 545                 }
 546
 547                 /* Check if we need to fill one column because of an uneven
 548                  * amount of windows */
 549                 if (container->mode == MODE_STACK) {
 550                         if (container->stack_limit == STACK_LIMIT_COLS && (current_col % 2) != 0) {
 551                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 552
 553                                 int offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 554                                 int offset_y = current_row * decoration_height;
 555                                 xcb_rectangle_t rect = {offset_x, offset_y,
 556                                                         offset_x + container->width,
 557                                                         offset_y + decoration_height };
 558                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 559                         } else if (container->stack_limit == STACK_LIMIT_ROWS && (current_row % 2) != 0) {
 560                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 561
 562                                 int offset_x = current_col * wrap;
 563                                 int offset_y = current_row * decoration_height;
 564                                 xcb_rectangle_t rect = {offset_x, offset_y,
 565                                                         offset_x + container->width,
 566                                                         offset_y + decoration_height };
 567                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 568                         }
 569                 }
 570
 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->screen->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         i3Screen *screen = r_ws->screen;
 599         enum { SET_NORMAL = 0, SET_FOCUSED = 1 };
 600
 601         /* Fill the whole bar in black */
 602         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 603         xcb_rectangle_t rect = {0, 0, width, height};
 604         xcb_poly_fill_rectangle(conn, screen->bar, screen->bargc, 1, &rect);
 605
 606         /* Set font */
 607         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FONT, font->id);
 608
 609         int drawn = 0;
 610         Workspace *ws;
 611         TAILQ_FOREACH(ws, workspaces, workspaces) {
 612                 if (ws->screen != screen)
 613                         continue;
 614
 615                 struct Colortriple *color;
 616
 617                 if (screen->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, screen->bar, screen->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, screen->bar, screen->bargc, color->background,
 632                               drawn + 1,
 633                               2,
 634                               ws->text_width + 4 + 4,
 635                               height - 4);
 636
 637                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, color->text);
 638                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_BACKGROUND, color->background);
 639                 xcb_image_text_16(conn, ws->name_len, screen->bar, screen->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, i3Screen *screen, 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, &(screen->dock_clients), dock_clients)
 688                 height -= client->desired_height;
 689
 690         /* Space for the internal bar */
 691         height -= (font->height + 6);
 692
 693         int xoffset[r_ws->rows];
 694         int yoffset[r_ws->cols];
 695         /* Initialize offsets */
 696         for (int cols = 0; cols < r_ws->cols; cols++)
 697                 yoffset[cols] = r_ws->rect.y;
 698         for (int rows = 0; rows < r_ws->rows; rows++)
 699                 xoffset[rows] = r_ws->rect.x;
 700
 701         ignore_enter_notify_forall(conn, r_ws, true);
 702
 703         /* Go through the whole table and render what’s necessary */
 704         FOR_TABLE(r_ws) {
 705                 Container *container = r_ws->table[cols][rows];
 706                 if (container == NULL)
 707                         continue;
 708                 int single_width = -1, single_height = -1;
 709                 /* Update position of the container */
 710                 container->row = rows;
 711                 container->col = cols;
 712                 container->x = xoffset[rows];
 713                 container->y = yoffset[cols];
 714                 container->width = 0;
 715
 716                 for (int c = 0; c < container->colspan; c++) {
 717                         if (r_ws->width_factor[cols+c] == 0)
 718                                 container->width += (width / r_ws->cols);
 719                         else container->width += get_unoccupied_x(r_ws) * r_ws->width_factor[cols+c];
 720
 721                         if (single_width == -1)
 722                                 single_width = container->width;
 723                 }
 724
 725                 DLOG("height is %d\n", height);
 726
 727                 container->height = 0;
 728
 729                 for (int c = 0; c < container->rowspan; c++) {
 730                         if (r_ws->height_factor[rows+c] == 0)
 731                                 container->height += (height / r_ws->rows);
 732                         else container->height += get_unoccupied_y(r_ws) * r_ws->height_factor[rows+c];
 733
 734                         if (single_height == -1)
 735                                 single_height = container->height;
 736                 }
 737
 738                 /* Render the container if it is not empty */
 739                 render_container(conn, container);
 740
 741                 xoffset[rows] += single_width;
 742                 yoffset[cols] += single_height;
 743         }
 744
 745         ignore_enter_notify_forall(conn, r_ws, false);
 746
 747         render_bars(conn, r_ws, width, &height);
 748         render_internal_bar(conn, r_ws, width, font->height + 6);
 749 }
 750
 751 /*
 752  * Renders the whole layout, that is: Go through each screen, each workspace, each container
 753  * and render each client. This also renders the bars.
 754  *
 755  * If you don’t need to render *everything*, you should call render_container on the container
 756  * you want to refresh.
 757  *
 758  */
 759 void render_layout(xcb_connection_t *conn) {
 760         i3Screen *screen;
 761
 762         if (virtual_screens == NULL)
 763                 return;
 764
 765         TAILQ_FOREACH(screen, virtual_screens, screens)
 766                 if (screen->current_workspace != NULL)
 767                         render_workspace(conn, screen, screen->current_workspace);
 768
 769         xcb_flush(conn);
 770 }