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
  33 /*
  34  * Updates *destination with new_value and returns true if it was changed or false
  35  * if it was the same
  36  *
  37  */
  38 static bool update_if_necessary(uint32_t *destination, const uint32_t new_value) {
  39         uint32_t old_value = *destination;
  40
  41         return ((*destination = new_value) != old_value);
  42 }
  43
  44 /*
  45  * Gets the unoccupied space (= space which is available for windows which were resized by the user)
  46  * for the given row. This is necessary to render both, customly resized windows and never touched
  47  * windows correctly, meaning that the aspect ratio will be maintained when opening new windows.
  48  *
  49  */
  50 int get_unoccupied_x(Workspace *workspace) {
  51         double unoccupied = workspace->rect.width;
  52         double default_factor = ((float)workspace->rect.width / workspace->cols) / workspace->rect.width;
  53
  54         DLOG("get_unoccupied_x(), starting with %f, default_factor = %f\n", unoccupied, default_factor);
  55
  56         for (int cols = 0; cols < workspace->cols; cols++) {
  57                 DLOG("width_factor[%d] = %f, unoccupied = %f\n", cols, workspace->width_factor[cols], unoccupied);
  58
  59                 if (workspace->width_factor[cols] == 0)
  60                         unoccupied -= workspace->rect.width * default_factor;
  61         }
  62
  63         DLOG("unoccupied space: %f\n", unoccupied);
  64         return unoccupied;
  65 }
  66
  67 /* See get_unoccupied_x() */
  68 int get_unoccupied_y(Workspace *workspace) {
  69         int height = workspace_height(workspace);
  70         double unoccupied = height;
  71         double default_factor = ((float)height / workspace->rows) / height;
  72
  73         DLOG("get_unoccupied_y(), starting with %f, default_factor = %f\n", unoccupied, default_factor);
  74
  75         for (int rows = 0; rows < workspace->rows; rows++) {
  76                 DLOG("height_factor[%d] = %f, unoccupied = %f\n", rows, workspace->height_factor[rows], unoccupied);
  77                 if (workspace->height_factor[rows] == 0)
  78                         unoccupied -= height * default_factor;
  79         }
  80
  81         DLOG("unoccupied space: %f\n", unoccupied);
  82         return unoccupied;
  83 }
  84
  85 /*
  86  * Redecorates the given client correctly by checking if it’s in a stacking container and
  87  * re-rendering the stack window or just calling decorate_window if it’s not in a stacking
  88  * container.
  89  *
  90  */
  91 void redecorate_window(xcb_connection_t *conn, Client *client) {
  92         if (client->container != NULL &&
  93             (client->container->mode == MODE_STACK ||
  94              client->container->mode == MODE_TABBED)) {
  95                 render_container(conn, client->container);
  96                 /* We clear the frame to generate exposure events, because the color used
  97                    in drawing may be different */
  98                 xcb_clear_area(conn, true, client->frame, 0, 0, client->rect.width, client->rect.height);
  99         } else decorate_window(conn, client, client->frame, client->titlegc, 0, 0);
 100         xcb_flush(conn);
 101 }
 102
 103 /*
 104  * (Re-)draws window decorations for a given Client onto the given drawable/graphic context.
 105  * When in stacking mode, the window decorations are drawn onto an own window.
 106  *
 107  */
 108 void decorate_window(xcb_connection_t *conn, Client *client, xcb_drawable_t drawable,
 109                      xcb_gcontext_t gc, int offset_x, int offset_y) {
 110         i3Font *font = load_font(conn, config.font);
 111         int decoration_height = font->height + 2 + 2;
 112         struct Colortriple *color;
 113         Client *last_focused;
 114
 115         /* Clients without a container (docks) won’t get decorated */
 116         if (client->dock)
 117                 return;
 118
 119         last_focused = SLIST_FIRST(&(client->workspace->focus_stack));
 120         /* Is the window urgent? */
 121         if (client->urgent)
 122                 color = &(config.client.urgent);
 123         else {
 124                 if (client_is_floating(client)) {
 125                         if (last_focused == client)
 126                                 color = &(config.client.focused);
 127                         else color = &(config.client.unfocused);
 128                 } else {
 129                         if (client->container->currently_focused == client) {
 130                                 /* Distinguish if the window is currently focused… */
 131                                 if (last_focused == client && c_ws == client->workspace)
 132                                         color = &(config.client.focused);
 133                                 /* …or if it is the focused window in a not focused container */
 134                                 else color = &(config.client.focused_inactive);
 135                         } else color = &(config.client.unfocused);
 136                 }
 137         }
 138
 139         /* Our plan is the following:
 140            - Draw a rect around the whole client in color->background
 141            - Draw two lines in a lighter color
 142            - Draw the window’s title
 143          */
 144
 145         /* Draw a rectangle in background color around the window */
 146         if (client->borderless && (client->container == NULL ||
 147             (client->container->mode != MODE_STACK &&
 148              client->container->mode != MODE_TABBED)))
 149                 xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 150         else xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, color->background);
 151
 152         /* In stacking mode, we only render the rect for this specific decoration */
 153         if (client->container != NULL && (client->container->mode == MODE_STACK || client->container->mode == MODE_TABBED)) {
 154                 /* We need to use the container’s width because it is the more recent value - when
 155                    in stacking mode, clients get reconfigured only on demand (the not active client
 156                    is not reconfigured), so the client’s rect.width would be wrong */
 157                 xcb_rectangle_t rect = {offset_x, offset_y,
 158                                         offset_x + client->container->width,
 159                                         offset_y + decoration_height };
 160                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 161         } else {
 162                 xcb_rectangle_t rect = {0, 0, client->rect.width, client->rect.height};
 163                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 164
 165                 /* Draw the inner background to have a black frame around clients (such as mplayer)
 166                    which cannot be resized exactly in our frames and therefore are centered */
 167                 xcb_change_gc_single(conn, client->titlegc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 168                 if (client->titlebar_position == TITLEBAR_OFF) {
 169                         xcb_rectangle_t crect = {1, 1, client->rect.width - (1 + 1), client->rect.height - (1 + 1)};
 170                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 171                 } else {
 172                         xcb_rectangle_t crect = {2, decoration_height,
 173                                                  client->rect.width - (2 + 2), client->rect.height - 2 - decoration_height};
 174                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 175                 }
 176         }
 177
 178         if (client->titlebar_position != TITLEBAR_OFF) {
 179                 /* Draw the lines */
 180                 xcb_draw_line(conn, drawable, gc, color->border, offset_x, offset_y, offset_x + client->rect.width, offset_y);
 181                 if ((client->container == NULL ||
 182                     (client->container->mode != MODE_STACK &&
 183                      client->container->mode != MODE_TABBED) ||
 184                     CIRCLEQ_NEXT_OR_NULL(&(client->container->clients), client, clients) == NULL))
 185                         xcb_draw_line(conn, drawable, gc, color->border,
 186                                       offset_x + 2, /* x */
 187                                       offset_y + font->height + 3, /* y */
 188                                       offset_x + client->rect.width - 3, /* to_x */
 189                                       offset_y + font->height + 3 /* to_y */);
 190         }
 191
 192         /* If the client has a title, we draw it */
 193         if (client->name != NULL &&
 194             ((client->container != NULL &&
 195               client->container->mode != MODE_DEFAULT) ||
 196              client->titlebar_position != TITLEBAR_OFF)) {
 197                 /* Draw the font */
 198                 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
 199                 uint32_t values[] = { color->text, color->background, font->id };
 200                 xcb_change_gc(conn, gc, mask, values);
 201
 202                 /* name_len == -1 means this is a legacy application which does not specify _NET_WM_NAME,
 203                    and we don’t handle the old window name (COMPOUND_TEXT) but only _NET_WM_NAME, which
 204                    is UTF-8 */
 205                 if (client->name_len == -1)
 206                         xcb_image_text_8(conn, strlen(client->name), drawable, gc, offset_x + 3 /* X */,
 207                                          offset_y + font->height /* Y = baseline of font */, client->name);
 208                 else
 209                         xcb_image_text_16(conn, client->name_len, drawable, gc, offset_x + 3 /* X */,
 210                                           offset_y + font->height /* Y = baseline of font */, (xcb_char2b_t*)client->name);
 211         }
 212 }
 213
 214 /*
 215  * Pushes the client’s x and y coordinates to X11
 216  *
 217  */
 218 void reposition_client(xcb_connection_t *conn, Client *client) {
 219         i3Screen *screen;
 220
 221         DLOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 222         /* Note: We can use a pointer to client->x like an array of uint32_ts
 223            because it is followed by client->y by definition */
 224         xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
 225
 226         if (!client_is_floating(client))
 227                 return;
 228
 229         /* If the client is floating, we need to check if we moved it to a different workspace */
 230         if (client->workspace->screen == (screen = get_screen_containing(client->rect.x, client->rect.y)))
 231                 return;
 232
 233         if (screen == NULL) {
 234                 DLOG("Boundary checking disabled, no screen found for (%d, %d)\n", client->rect.x, client->rect.y);
 235                 return;
 236         }
 237
 238         DLOG("Client is on workspace %p with screen %p\n", client->workspace, client->workspace->screen);
 239         DLOG("but screen at %d, %d is %p\n", client->rect.x, client->rect.y, screen);
 240         floating_assign_to_workspace(client, screen->current_workspace);
 241 }
 242
 243 /*
 244  * Pushes the client’s width/height to X11 and resizes the child window. This
 245  * function also updates the client’s position, so if you work on tiling clients
 246  * only, you can use this function instead of separate calls to reposition_client
 247  * and resize_client to reduce flickering.
 248  *
 249  */
 250 void resize_client(xcb_connection_t *conn, Client *client) {
 251         i3Font *font = load_font(conn, config.font);
 252
 253         DLOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 254         DLOG("resizing client 0x%08x to %d x %d\n", client->frame, client->rect.width, client->rect.height);
 255         xcb_configure_window(conn, client->frame,
 256                         XCB_CONFIG_WINDOW_X |
 257                         XCB_CONFIG_WINDOW_Y |
 258                         XCB_CONFIG_WINDOW_WIDTH |
 259                         XCB_CONFIG_WINDOW_HEIGHT,
 260                         &(client->rect.x));
 261
 262         /* Adjust the position of the child inside its frame.
 263          * The coordinates of the child are relative to its frame, we
 264          * add a border of 2 pixel to each value */
 265         uint32_t mask = XCB_CONFIG_WINDOW_X |
 266                         XCB_CONFIG_WINDOW_Y |
 267                         XCB_CONFIG_WINDOW_WIDTH |
 268                         XCB_CONFIG_WINDOW_HEIGHT;
 269         Rect *rect = &(client->child_rect);
 270         switch ((client->container != NULL ? client->container->mode : MODE_DEFAULT)) {
 271                 case MODE_STACK:
 272                 case MODE_TABBED:
 273                         rect->x = 2;
 274                         rect->y = 0;
 275                         rect->width = client->rect.width - (2 + 2);
 276                         rect->height = client->rect.height - 2;
 277                         break;
 278                 default:
 279                         if (client->titlebar_position == TITLEBAR_OFF && client->borderless) {
 280                                 rect->x = 0;
 281                                 rect->y = 0;
 282                                 rect->width = client->rect.width;
 283                                 rect->height = client->rect.height;
 284                         } else if (client->titlebar_position == TITLEBAR_OFF && !client->borderless) {
 285                                 rect->x = 1;
 286                                 rect->y = 1;
 287                                 rect->width = client->rect.width - 1 - 1;
 288                                 rect->height = client->rect.height - 1 - 1;
 289                         } else {
 290                                 rect->x = 2;
 291                                 rect->y = font->height + 2 + 2;
 292                                 rect->width = client->rect.width - (2 + 2);
 293                                 rect->height = client->rect.height - ((font->height + 2 + 2) + 2);
 294                         }
 295                         break;
 296         }
 297
 298         rect->width -= (2 * client->border_width);
 299         rect->height -= (2 * client->border_width);
 300
 301         /* Obey the ratio, if any */
 302         if (client->proportional_height != 0 &&
 303             client->proportional_width != 0) {
 304                 DLOG("proportional height = %d, width = %d\n", client->proportional_height, client->proportional_width);
 305                 double new_height = rect->height + 1;
 306                 int new_width = rect->width;
 307
 308                 while (new_height > rect->height) {
 309                         new_height = ((double)client->proportional_height / client->proportional_width) * new_width;
 310
 311                         if (new_height > rect->height)
 312                                 new_width--;
 313                 }
 314                 /* Center the window */
 315                 rect->y += ceil(rect->height / 2) - floor(new_height / 2);
 316                 rect->x += ceil(rect->width / 2) - floor(new_width / 2);
 317
 318                 rect->height = new_height;
 319                 rect->width = new_width;
 320                 DLOG("new_height = %f, new_width = %d\n", new_height, new_width);
 321         }
 322
 323         if (client->height_increment > 1) {
 324                 int old_height = rect->height;
 325                 rect->height -= (rect->height - client->base_height) % client->height_increment;
 326                 DLOG("Lost %d pixel due to client's height_increment (%d px, base_height = %d)\n",
 327                     old_height - rect->height, client->height_increment, client->base_height);
 328         }
 329
 330         if (client->width_increment > 1) {
 331                 int old_width = rect->width;
 332                 rect->width -= (rect->width - client->base_width) % client->width_increment;
 333                 DLOG("Lost %d pixel due to client's width_increment (%d px, base_width = %d)\n",
 334                     old_width - rect->width, client->width_increment, client->base_width);
 335         }
 336
 337         DLOG("child will be at %dx%d with size %dx%d\n", rect->x, rect->y, rect->width, rect->height);
 338
 339         xcb_configure_window(conn, client->child, mask, &(rect->x));
 340
 341         /* After configuring a child window we need to fake a configure_notify_event (see ICCCM 4.2.3).
 342          * This is necessary to inform the client of its position relative to the root window,
 343          * not relative to its frame (as done in the configure_notify_event by the x server). */
 344         fake_absolute_configure_notify(conn, client);
 345
 346         /* Force redrawing after resizing the window because any now lost
 347          * pixels could contain old garbage. */
 348         xcb_expose_event_t generated;
 349         generated.window = client->frame;
 350         generated.count = 0;
 351         handle_expose_event(NULL, conn, &generated);
 352 }
 353
 354 /*
 355  * Renders the given container. Is called by render_layout() or individually (for example
 356  * when focus changes in a stacking container)
 357  *
 358  */
 359 void render_container(xcb_connection_t *conn, Container *container) {
 360         Client *client;
 361         int num_clients = 0, current_client = 0;
 362
 363         CIRCLEQ_FOREACH(client, &(container->clients), clients)
 364                 num_clients++;
 365
 366         if (container->mode == MODE_DEFAULT) {
 367                 int height = (container->height / max(1, num_clients));
 368                 int rest_pixels = (container->height % max(1, num_clients));
 369                 DLOG("height per client = %d, rest = %d\n", height, rest_pixels);
 370
 371                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 372                         /* If the client is in fullscreen mode, it does not get reconfigured */
 373                         if (container->workspace->fullscreen_client == client) {
 374                                 current_client++;
 375                                 continue;
 376                         }
 377
 378                         /* If we have some pixels left to distribute, add one
 379                          * pixel to each client as long as possible. */
 380                         int this_height = height;
 381                         if (rest_pixels > 0) {
 382                                 height++;
 383                                 rest_pixels--;
 384                         }
 385                         /* Check if we changed client->x or client->y by updating it.
 386                          * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 387                         if (client->force_reconfigure |
 388                             update_if_necessary(&(client->rect.x), container->x) |
 389                             update_if_necessary(&(client->rect.y), container->y +
 390                                         (container->height / num_clients) * current_client) |
 391                             update_if_necessary(&(client->rect.width), container->width) |
 392                             update_if_necessary(&(client->rect.height), this_height))
 393                                 resize_client(conn, client);
 394
 395                         /* TODO: vertical default layout */
 396
 397                         client->force_reconfigure = false;
 398
 399                         current_client++;
 400                 }
 401         } else {
 402                 i3Font *font = load_font(conn, config.font);
 403                 int decoration_height = (font->height + 2 + 2);
 404                 struct Stack_Window *stack_win = &(container->stack_win);
 405                 /* The size for each tab (width), necessary as a separate variable
 406                  * because num_clients gets fixed to 1 in tabbed mode. */
 407                 int size_each = (num_clients == 0 ? container->width : container->width / num_clients);
 408                 int stack_lines = num_clients;
 409
 410                 /* Check if we need to remap our stack title window, it gets unmapped when the container
 411                    is empty in src/handlers.c:unmap_notify() */
 412                 if (stack_win->rect.height == 0 && num_clients > 0) {
 413                         DLOG("remapping stack win\n");
 414                         xcb_map_window(conn, stack_win->window);
 415                 } else DLOG("not remapping stackwin, height = %d, num_clients = %d\n",
 416                                 stack_win->rect.height, num_clients);
 417
 418                 if (container->mode == MODE_TABBED) {
 419                         /* By setting num_clients to 1 we force that the stack window will be only one line
 420                          * high. The rest of the code is useful in both cases. */
 421                         DLOG("tabbed mode, setting num_clients = 1\n");
 422                         if (stack_lines > 1)
 423                                 stack_lines = 1;
 424                 }
 425
 426                 if (container->stack_limit == STACK_LIMIT_COLS) {
 427                         stack_lines = ceil((float)num_clients / container->stack_limit_value);
 428                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 429                         stack_lines = min(num_clients, container->stack_limit_value);
 430                 }
 431
 432                 /* Check if we need to reconfigure our stack title window */
 433                 if (update_if_necessary(&(stack_win->rect.x), container->x) |
 434                     update_if_necessary(&(stack_win->rect.y), container->y) |
 435                     update_if_necessary(&(stack_win->rect.width), container->width) |
 436                     update_if_necessary(&(stack_win->rect.height), decoration_height * stack_lines)) {
 437
 438                         /* Configuration can happen in two slightly different ways:
 439
 440                            If there is no client in fullscreen mode, 5 parameters are passed
 441                            (x, y, width, height, stack mode is set to above which means top-most position).
 442
 443                            If there is a fullscreen client, the fourth parameter is set to to the
 444                            fullscreen window as sibling and the stack mode is set to below, which means
 445                            that the stack_window will be placed just below the sibling, that is, under
 446                            the fullscreen window.
 447                          */
 448                         uint32_t values[] = { stack_win->rect.x, stack_win->rect.y,
 449                                               stack_win->rect.width, stack_win->rect.height,
 450                                               XCB_STACK_MODE_ABOVE, XCB_STACK_MODE_BELOW };
 451                         uint32_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
 452                                         XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT |
 453                                         XCB_CONFIG_WINDOW_STACK_MODE;
 454
 455                         /* Raise the stack window, but keep it below the first floating client
 456                          * and below the fullscreen client (if any) */
 457                         Client *first_floating = TAILQ_FIRST(&(container->workspace->floating_clients));
 458                         if (first_floating != TAILQ_END(&(container->workspace->floating_clients))) {
 459                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 460                                 values[4] = first_floating->frame;
 461                         } else if (container->workspace->fullscreen_client != NULL) {
 462                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 463                                 values[4] = container->workspace->fullscreen_client->frame;
 464                         }
 465
 466                         xcb_configure_window(conn, stack_win->window, mask, values);
 467                 }
 468
 469                 /* Prepare the pixmap for usage */
 470                 cached_pixmap_prepare(conn, &(stack_win->pixmap));
 471
 472                 int current_row = 0, current_col = 0;
 473                 int wrap = 0;
 474
 475                 if (container->stack_limit == STACK_LIMIT_COLS) {
 476                         /* wrap stores the number of rows after which we will
 477                          * wrap to a new column. */
 478                         wrap = ceil((float)num_clients / container->stack_limit_value);
 479                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 480                         /* When limiting rows, the wrap variable serves a
 481                          * slightly different purpose: it holds the number of
 482                          * pixels which each client will get. This is constant
 483                          * during the following loop, so it saves us some
 484                          * divisions and ceil()ing. */
 485                         wrap = (stack_win->rect.width / ceil((float)num_clients / container->stack_limit_value));
 486                 }
 487
 488                 /* Render the decorations of all clients */
 489                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 490                         /* If the client is in fullscreen mode, it does not get reconfigured */
 491                         if (container->workspace->fullscreen_client == client) {
 492                                 current_client++;
 493                                 continue;
 494                         }
 495
 496                         /* Check if we changed client->x or client->y by updating it.
 497                          * Note the bitwise OR instead of logical OR to force evaluation of all statements */
 498                         if (client->force_reconfigure |
 499                             update_if_necessary(&(client->rect.x), container->x) |
 500                             update_if_necessary(&(client->rect.y), container->y + (decoration_height * stack_lines)) |
 501                             update_if_necessary(&(client->rect.width), container->width) |
 502                             update_if_necessary(&(client->rect.height), container->height - (decoration_height * stack_lines)))
 503                                 resize_client(conn, client);
 504
 505                         client->force_reconfigure = false;
 506
 507                         int offset_x = 0;
 508                         int offset_y = 0;
 509                         if (container->mode == MODE_STACK ||
 510                             (container->mode == MODE_TABBED &&
 511                              container->stack_limit == STACK_LIMIT_COLS)) {
 512                                 if (container->stack_limit == STACK_LIMIT_COLS) {
 513                                         offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 514                                         offset_y = current_row * decoration_height;
 515                                         current_row++;
 516                                         if ((current_row % wrap) == 0) {
 517                                                 current_col++;
 518                                                 current_row = 0;
 519                                         }
 520                                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 521                                         offset_x = current_col * wrap;
 522                                         offset_y = current_row * decoration_height;
 523                                         current_row++;
 524                                         if ((current_row % container->stack_limit_value) == 0) {
 525                                                 current_col++;
 526                                                 current_row = 0;
 527                                         }
 528                                 } else {
 529                                         offset_y = current_client * decoration_height;
 530                                 }
 531                                 current_client++;
 532                         } else if (container->mode == MODE_TABBED) {
 533                                 if (container->stack_limit == STACK_LIMIT_ROWS) {
 534                                         LOG("You limited a tabbed container in its rows. "
 535                                             "This makes no sense in tabbing mode.\n");
 536                                 }
 537                                 offset_x = current_client++ * size_each;
 538                         }
 539                         decorate_window(conn, client, stack_win->pixmap.id, stack_win->pixmap.gc,
 540                                         offset_x, offset_y);
 541                 }
 542
 543                 /* Check if we need to fill one column because of an uneven
 544                  * amount of windows */
 545                 if (container->mode == MODE_STACK) {
 546                         if (container->stack_limit == STACK_LIMIT_COLS && (current_col % 2) != 0) {
 547                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 548
 549                                 int offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 550                                 int offset_y = current_row * decoration_height;
 551                                 xcb_rectangle_t rect = {offset_x, offset_y,
 552                                                         offset_x + container->width,
 553                                                         offset_y + decoration_height };
 554                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 555                         } else if (container->stack_limit == STACK_LIMIT_ROWS && (current_row % 2) != 0) {
 556                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 557
 558                                 int offset_x = current_col * wrap;
 559                                 int offset_y = current_row * decoration_height;
 560                                 xcb_rectangle_t rect = {offset_x, offset_y,
 561                                                         offset_x + container->width,
 562                                                         offset_y + decoration_height };
 563                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 564                         }
 565                 }
 566
 567                 xcb_copy_area(conn, stack_win->pixmap.id, stack_win->window, stack_win->pixmap.gc,
 568                               0, 0, 0, 0, stack_win->rect.width, stack_win->rect.height);
 569         }
 570 }
 571
 572 static void render_bars(xcb_connection_t *conn, Workspace *r_ws, int width, int *height) {
 573         Client *client;
 574         SLIST_FOREACH(client, &(r_ws->screen->dock_clients), dock_clients) {
 575                 DLOG("client is at %d, should be at %d\n", client->rect.y, *height);
 576                 if (client->force_reconfigure |
 577                     update_if_necessary(&(client->rect.x), r_ws->rect.x) |
 578                     update_if_necessary(&(client->rect.y), *height))
 579                         reposition_client(conn, client);
 580
 581                 if (client->force_reconfigure |
 582                     update_if_necessary(&(client->rect.width), width) |
 583                     update_if_necessary(&(client->rect.height), client->desired_height))
 584                         resize_client(conn, client);
 585
 586                 client->force_reconfigure = false;
 587                 DLOG("desired_height = %d\n", client->desired_height);
 588                 *height += client->desired_height;
 589         }
 590 }
 591
 592 static void render_internal_bar(xcb_connection_t *conn, Workspace *r_ws, int width, int height) {
 593         i3Font *font = load_font(conn, config.font);
 594         i3Screen *screen = r_ws->screen;
 595         enum { SET_NORMAL = 0, SET_FOCUSED = 1 };
 596
 597         /* Fill the whole bar in black */
 598         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 599         xcb_rectangle_t rect = {0, 0, width, height};
 600         xcb_poly_fill_rectangle(conn, screen->bar, screen->bargc, 1, &rect);
 601
 602         /* Set font */
 603         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FONT, font->id);
 604
 605         int drawn = 0;
 606         Workspace *ws;
 607         TAILQ_FOREACH(ws, workspaces, workspaces) {
 608                 if (ws->screen != screen)
 609                         continue;
 610
 611                 struct Colortriple *color;
 612
 613                 if (screen->current_workspace == ws)
 614                         color = &(config.bar.focused);
 615                 else if (ws->urgent)
 616                         color = &(config.bar.urgent);
 617                 else color = &(config.bar.unfocused);
 618
 619                 /* Draw the outer rect */
 620                 xcb_draw_rect(conn, screen->bar, screen->bargc, color->border,
 621                               drawn,              /* x */
 622                               1,                  /* y */
 623                               ws->text_width + 5 + 5, /* width = text width + 5 px left + 5px right */
 624                               height - 2          /* height = max. height - 1 px upper and 1 px bottom border */);
 625
 626                 /* Draw the background of this rect */
 627                 xcb_draw_rect(conn, screen->bar, screen->bargc, color->background,
 628                               drawn + 1,
 629                               2,
 630                               ws->text_width + 4 + 4,
 631                               height - 4);
 632
 633                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, color->text);
 634                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_BACKGROUND, color->background);
 635                 xcb_image_text_16(conn, ws->name_len, screen->bar, screen->bargc, drawn + 5 /* X */,
 636                                   font->height + 1 /* Y = baseline of font */,
 637                                   (xcb_char2b_t*)ws->name);
 638                 drawn += ws->text_width + 12;
 639         }
 640 }
 641
 642 /*
 643  * Modifies the event mask of all clients on the given workspace to either ignore or to handle
 644  * enter notifies. It is handy to ignore notifies because they will be sent when a window is mapped
 645  * under the cursor, thus when the user didn’t enter the window actively at all.
 646  *
 647  */
 648 void ignore_enter_notify_forall(xcb_connection_t *conn, Workspace *workspace, bool ignore_enter_notify) {
 649         Client *client;
 650         uint32_t values[1];
 651
 652         FOR_TABLE(workspace) {
 653                 if (workspace->table[cols][rows] == NULL)
 654                         continue;
 655
 656                 CIRCLEQ_FOREACH(client, &(workspace->table[cols][rows]->clients), clients) {
 657                         /* Change event mask for the decorations */
 658                         values[0] = FRAME_EVENT_MASK;
 659                         if (ignore_enter_notify)
 660                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 661                         xcb_change_window_attributes(conn, client->frame, XCB_CW_EVENT_MASK, values);
 662
 663                         /* Change event mask for the child itself */
 664                         values[0] = CHILD_EVENT_MASK;
 665                         if (ignore_enter_notify)
 666                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 667                         xcb_change_window_attributes(conn, client->child, XCB_CW_EVENT_MASK, values);
 668                 }
 669         }
 670 }
 671
 672 /*
 673  * Renders the given workspace on the given screen
 674  *
 675  */
 676 void render_workspace(xcb_connection_t *conn, i3Screen *screen, Workspace *r_ws) {
 677         i3Font *font = load_font(conn, config.font);
 678         int width = r_ws->rect.width;
 679         int height = r_ws->rect.height;
 680
 681         /* Reserve space for dock clients */
 682         Client *client;
 683         SLIST_FOREACH(client, &(screen->dock_clients), dock_clients)
 684                 height -= client->desired_height;
 685
 686         /* Space for the internal bar */
 687         height -= (font->height + 6);
 688
 689         int xoffset[r_ws->rows];
 690         int yoffset[r_ws->cols];
 691         /* Initialize offsets */
 692         for (int cols = 0; cols < r_ws->cols; cols++)
 693                 yoffset[cols] = r_ws->rect.y;
 694         for (int rows = 0; rows < r_ws->rows; rows++)
 695                 xoffset[rows] = r_ws->rect.x;
 696
 697         ignore_enter_notify_forall(conn, r_ws, true);
 698
 699         /* Go through the whole table and render what’s necessary */
 700         FOR_TABLE(r_ws) {
 701                 Container *container = r_ws->table[cols][rows];
 702                 if (container == NULL)
 703                         continue;
 704                 int single_width = -1, single_height = -1;
 705                 /* Update position of the container */
 706                 container->row = rows;
 707                 container->col = cols;
 708                 container->x = xoffset[rows];
 709                 container->y = yoffset[cols];
 710                 container->width = 0;
 711
 712                 for (int c = 0; c < container->colspan; c++) {
 713                         if (r_ws->width_factor[cols+c] == 0)
 714                                 container->width += (width / r_ws->cols);
 715                         else container->width += get_unoccupied_x(r_ws) * r_ws->width_factor[cols+c];
 716
 717                         if (single_width == -1)
 718                                 single_width = container->width;
 719                 }
 720
 721                 DLOG("height is %d\n", height);
 722
 723                 container->height = 0;
 724
 725                 for (int c = 0; c < container->rowspan; c++) {
 726                         if (r_ws->height_factor[rows+c] == 0)
 727                                 container->height += (height / r_ws->rows);
 728                         else container->height += get_unoccupied_y(r_ws) * r_ws->height_factor[rows+c];
 729
 730                         if (single_height == -1)
 731                                 single_height = container->height;
 732                 }
 733
 734                 /* Render the container if it is not empty */
 735                 render_container(conn, container);
 736
 737                 xoffset[rows] += single_width;
 738                 yoffset[cols] += single_height;
 739         }
 740
 741         ignore_enter_notify_forall(conn, r_ws, false);
 742
 743         render_bars(conn, r_ws, width, &height);
 744         render_internal_bar(conn, r_ws, width, font->height + 6);
 745 }
 746
 747 /*
 748  * Renders the whole layout, that is: Go through each screen, each workspace, each container
 749  * and render each client. This also renders the bars.
 750  *
 751  * If you don’t need to render *everything*, you should call render_container on the container
 752  * you want to refresh.
 753  *
 754  */
 755 void render_layout(xcb_connection_t *conn) {
 756         i3Screen *screen;
 757
 758         if (virtual_screens == NULL)
 759                 return;
 760
 761         TAILQ_FOREACH(screen, virtual_screens, screens)
 762                 if (screen->current_workspace != NULL)
 763                         render_workspace(conn, screen, screen->current_workspace);
 764
 765         xcb_flush(conn);
 766 }