git.sur5r.net Git - i3/i3/blob - src/layout.c

   1 /*
   2  * vim:ts=8:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  *
   6  * © 2009 Michael Stapelberg and contributors
   7  *
   8  * See file LICENSE for license information.
   9  *
  10  * layout.c: Functions handling layout/drawing of window decorations
  11  *
  12  */
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include <stdlib.h>
  16 #include <xcb/xcb.h>
  17 #include <assert.h>
  18 #include <math.h>
  19
  20 #include "config.h"
  21 #include "i3.h"
  22 #include "xcb.h"
  23 #include "table.h"
  24 #include "util.h"
  25 #include "xinerama.h"
  26 #include "layout.h"
  27 #include "client.h"
  28 #include "floating.h"
  29 #include "handlers.h"
  30 #include "workspace.h"
  31
  32 /*
  33  * Updates *destination with new_value and returns true if it was changed or false
  34  * if it was the same
  35  *
  36  */
  37 static bool update_if_necessary(uint32_t *destination, const uint32_t new_value) {
  38         uint32_t old_value = *destination;
  39
  40         return ((*destination = new_value) != old_value);
  41 }
  42
  43 /*
  44  * Gets the unoccupied space (= space which is available for windows which were resized by the user)
  45  * for the given row. This is necessary to render both, customly resized windows and never touched
  46  * windows correctly, meaning that the aspect ratio will be maintained when opening new windows.
  47  *
  48  */
  49 int get_unoccupied_x(Workspace *workspace) {
  50         int unoccupied = workspace->rect.width;
  51         float default_factor = ((float)workspace->rect.width / workspace->cols) / workspace->rect.width;
  52
  53         LOG("get_unoccupied_x(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
  54
  55         for (int cols = 0; cols < workspace->cols; cols++) {
  56                 LOG("width_factor[%d] = %f\n", cols, workspace->width_factor[cols]);
  57
  58                 if (workspace->width_factor[cols] == 0)
  59                         unoccupied -= workspace->rect.width * default_factor;
  60         }
  61
  62         LOG("unoccupied space: %d\n", unoccupied);
  63         return unoccupied;
  64 }
  65
  66 /* See get_unoccupied_x() */
  67 int get_unoccupied_y(Workspace *workspace) {
  68         int height = workspace_height(workspace);
  69         int unoccupied = height;
  70         float default_factor = ((float)height / workspace->rows) / height;
  71
  72         LOG("get_unoccupied_y(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
  73
  74         for (int rows = 0; rows < workspace->rows; rows++) {
  75                 LOG("height_factor[%d] = %f\n", rows, workspace->height_factor[rows]);
  76                 if (workspace->height_factor[rows] == 0)
  77                         unoccupied -= height * default_factor;
  78         }
  79
  80         LOG("unoccupied space: %d\n", unoccupied);
  81         return unoccupied;
  82 }
  83
  84 /*
  85  * Redecorates the given client correctly by checking if it’s in a stacking container and
  86  * re-rendering the stack window or just calling decorate_window if it’s not in a stacking
  87  * container.
  88  *
  89  */
  90 void redecorate_window(xcb_connection_t *conn, Client *client) {
  91         if (client->container != NULL &&
  92             (client->container->mode == MODE_STACK ||
  93              client->container->mode == MODE_TABBED)) {
  94                 render_container(conn, client->container);
  95                 /* We clear the frame to generate exposure events, because the color used
  96                    in drawing may be different */
  97                 xcb_clear_area(conn, true, client->frame, 0, 0, client->rect.width, client->rect.height);
  98         } else decorate_window(conn, client, client->frame, client->titlegc, 0, 0);
  99         xcb_flush(conn);
 100 }
 101
 102 /*
 103  * (Re-)draws window decorations for a given Client onto the given drawable/graphic context.
 104  * When in stacking mode, the window decorations are drawn onto an own window.
 105  *
 106  */
 107 void decorate_window(xcb_connection_t *conn, Client *client, xcb_drawable_t drawable,
 108                      xcb_gcontext_t gc, int offset_x, int offset_y) {
 109         i3Font *font = load_font(conn, config.font);
 110         int decoration_height = font->height + 2 + 2;
 111         struct Colortriple *color;
 112         Client *last_focused;
 113
 114         /* Clients without a container (docks) won’t get decorated */
 115         if (client->dock)
 116                 return;
 117
 118         last_focused = SLIST_FIRST(&(client->workspace->focus_stack));
 119         /* Is the window urgent? */
 120         if (client->urgent)
 121                 color = &(config.client.urgent);
 122         else {
 123                 if (client_is_floating(client)) {
 124                         if (last_focused == client)
 125                                 color = &(config.client.focused);
 126                         else color = &(config.client.unfocused);
 127                 } else {
 128                         if (client->container->currently_focused == client) {
 129                                 /* Distinguish if the window is currently focused… */
 130                                 if (last_focused == client && c_ws == client->workspace)
 131                                         color = &(config.client.focused);
 132                                 /* …or if it is the focused window in a not focused container */
 133                                 else color = &(config.client.focused_inactive);
 134                         } else color = &(config.client.unfocused);
 135                 }
 136         }
 137
 138         /* Our plan is the following:
 139            - Draw a rect around the whole client in color->background
 140            - Draw two lines in a lighter color
 141            - Draw the window’s title
 142          */
 143
 144         /* Draw a rectangle in background color around the window */
 145         if (client->borderless && (client->container == NULL ||
 146             (client->container->mode != MODE_STACK &&
 147              client->container->mode != MODE_TABBED)))
 148                 xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 149         else xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, color->background);
 150
 151         /* In stacking mode, we only render the rect for this specific decoration */
 152         if (client->container != NULL && (client->container->mode == MODE_STACK || client->container->mode == MODE_TABBED)) {
 153                 /* We need to use the container’s width because it is the more recent value - when
 154                    in stacking mode, clients get reconfigured only on demand (the not active client
 155                    is not reconfigured), so the client’s rect.width would be wrong */
 156                 xcb_rectangle_t rect = {offset_x, offset_y,
 157                                         offset_x + client->container->width,
 158                                         offset_y + decoration_height };
 159                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 160         } else {
 161                 xcb_rectangle_t rect = {0, 0, client->rect.width, client->rect.height};
 162                 xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 163
 164                 /* Draw the inner background to have a black frame around clients (such as mplayer)
 165                    which cannot be resized exactly in our frames and therefore are centered */
 166                 xcb_change_gc_single(conn, client->titlegc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 167                 if (client->titlebar_position == TITLEBAR_OFF) {
 168                         xcb_rectangle_t crect = {1, 1, client->rect.width - (1 + 1), client->rect.height - (1 + 1)};
 169                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 170                 } else {
 171                         xcb_rectangle_t crect = {2, decoration_height,
 172                                                  client->rect.width - (2 + 2), client->rect.height - 2 - decoration_height};
 173                         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 174                 }
 175         }
 176
 177         if (client->titlebar_position != TITLEBAR_OFF) {
 178                 /* Draw the lines */
 179                 xcb_draw_line(conn, drawable, gc, color->border, offset_x, offset_y, offset_x + client->rect.width, offset_y);
 180                 if ((client->container == NULL ||
 181                     (client->container->mode != MODE_STACK &&
 182                      client->container->mode != MODE_TABBED) ||
 183                     CIRCLEQ_NEXT_OR_NULL(&(client->container->clients), client, clients) == NULL))
 184                         xcb_draw_line(conn, drawable, gc, color->border,
 185                                       offset_x + 2, /* x */
 186                                       offset_y + font->height + 3, /* y */
 187                                       offset_x + client->rect.width - 3, /* to_x */
 188                                       offset_y + font->height + 3 /* to_y */);
 189         }
 190
 191         /* If the client has a title, we draw it */
 192         if (client->name != NULL &&
 193             ((client->container != NULL &&
 194               client->container->mode != MODE_DEFAULT) ||
 195              client->titlebar_position != TITLEBAR_OFF)) {
 196                 /* Draw the font */
 197                 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
 198                 uint32_t values[] = { color->text, color->background, font->id };
 199                 xcb_change_gc(conn, gc, mask, values);
 200
 201                 /* name_len == -1 means this is a legacy application which does not specify _NET_WM_NAME,
 202                    and we don’t handle the old window name (COMPOUND_TEXT) but only _NET_WM_NAME, which
 203                    is UTF-8 */
 204                 if (client->name_len == -1)
 205                         xcb_image_text_8(conn, strlen(client->name), drawable, gc, offset_x + 3 /* X */,
 206                                          offset_y + font->height /* Y = baseline of font */, client->name);
 207                 else
 208                         xcb_image_text_16(conn, client->name_len, drawable, gc, offset_x + 3 /* X */,
 209                                           offset_y + font->height /* Y = baseline of font */, (xcb_char2b_t*)client->name);
 210         }
 211 }
 212
 213 /*
 214  * Pushes the client’s x and y coordinates to X11
 215  *
 216  */
 217 void reposition_client(xcb_connection_t *conn, Client *client) {
 218         i3Screen *screen;
 219
 220         LOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 221         /* Note: We can use a pointer to client->x like an array of uint32_ts
 222            because it is followed by client->y by definition */
 223         xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
 224
 225         if (!client_is_floating(client))
 226                 return;
 227
 228         /* If the client is floating, we need to check if we moved it to a different workspace */
 229         if (client->workspace->screen == (screen = get_screen_containing(client->rect.x, client->rect.y)))
 230                 return;
 231
 232         if (screen == NULL) {
 233                 LOG("Boundary checking disabled, no screen found for (%d, %d)\n", client->rect.x, client->rect.y);
 234                 return;
 235         }
 236
 237         LOG("Client is on workspace %p with screen %p\n", client->workspace, client->workspace->screen);
 238         LOG("but screen at %d, %d is %p\n", client->rect.x, client->rect.y, screen);
 239         floating_assign_to_workspace(client, screen->current_workspace);
 240 }
 241
 242 /*
 243  * Pushes the client’s width/height to X11 and resizes the child window. This
 244  * function also updates the client’s position, so if you work on tiling clients
 245  * only, you can use this function instead of separate calls to reposition_client
 246  * and resize_client to reduce flickering.
 247  *
 248  */
 249 void resize_client(xcb_connection_t *conn, Client *client) {
 250         i3Font *font = load_font(conn, config.font);
 251
 252         LOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
 253         LOG("resizing client 0x%08x to %d x %d\n", client->frame, client->rect.width, client->rect.height);
 254         xcb_configure_window(conn, client->frame,
 255                         XCB_CONFIG_WINDOW_X |
 256                         XCB_CONFIG_WINDOW_Y |
 257                         XCB_CONFIG_WINDOW_WIDTH |
 258                         XCB_CONFIG_WINDOW_HEIGHT,
 259                         &(client->rect.x));
 260
 261         /* Adjust the position of the child inside its frame.
 262          * The coordinates of the child are relative to its frame, we
 263          * add a border of 2 pixel to each value */
 264         uint32_t mask = XCB_CONFIG_WINDOW_X |
 265                         XCB_CONFIG_WINDOW_Y |
 266                         XCB_CONFIG_WINDOW_WIDTH |
 267                         XCB_CONFIG_WINDOW_HEIGHT;
 268         Rect *rect = &(client->child_rect);
 269         switch ((client->container != NULL ? client->container->mode : MODE_DEFAULT)) {
 270                 case MODE_STACK:
 271                 case MODE_TABBED:
 272                         rect->x = 2;
 273                         rect->y = 0;
 274                         rect->width = client->rect.width - (2 + 2);
 275                         rect->height = client->rect.height - 2;
 276                         break;
 277                 default:
 278                         if (client->titlebar_position == TITLEBAR_OFF && client->borderless) {
 279                                 rect->x = 0;
 280                                 rect->y = 0;
 281                                 rect->width = client->rect.width;
 282                                 rect->height = client->rect.height;
 283                         } else if (client->titlebar_position == TITLEBAR_OFF && !client->borderless) {
 284                                 rect->x = 1;
 285                                 rect->y = 1;
 286                                 rect->width = client->rect.width - 1 - 1;
 287                                 rect->height = client->rect.height - 1 - 1;
 288                         } else {
 289                                 rect->x = 2;
 290                                 rect->y = font->height + 2 + 2;
 291                                 rect->width = client->rect.width - (2 + 2);
 292                                 rect->height = client->rect.height - ((font->height + 2 + 2) + 2);
 293                         }
 294                         break;
 295         }
 296
 297         rect->width -= (2 * client->border_width);
 298         rect->height -= (2 * client->border_width);
 299
 300         /* Obey the ratio, if any */
 301         if (client->proportional_height != 0 &&
 302             client->proportional_width != 0) {
 303                 LOG("proportional height = %d, width = %d\n", client->proportional_height, client->proportional_width);
 304                 double new_height = rect->height + 1;
 305                 int new_width = rect->width;
 306
 307                 while (new_height > rect->height) {
 308                         new_height = ((double)client->proportional_height / client->proportional_width) * new_width;
 309
 310                         if (new_height > rect->height)
 311                                 new_width--;
 312                 }
 313                 /* Center the window */
 314                 rect->y += ceil(rect->height / 2) - floor(new_height / 2);
 315                 rect->x += ceil(rect->width / 2) - floor(new_width / 2);
 316
 317                 rect->height = new_height;
 318                 rect->width = new_width;
 319                 LOG("new_height = %f, new_width = %d\n", new_height, new_width);
 320         }
 321
 322         if (client->height_increment > 1) {
 323                 int old_height = rect->height;
 324                 rect->height -= (rect->height - client->base_height) % client->height_increment;
 325                 LOG("Lost %d pixel due to client's height_increment (%d px, base_height = %d)\n",
 326                     old_height - rect->height, client->height_increment, client->base_height);
 327         }
 328
 329         if (client->width_increment > 1) {
 330                 int old_width = rect->width;
 331                 rect->width -= (rect->width - client->base_width) % client->width_increment;
 332                 LOG("Lost %d pixel due to client's width_increment (%d px, base_width = %d)\n",
 333                     old_width - rect->width, client->width_increment, client->base_width);
 334         }
 335
 336         LOG("child will be at %dx%d with size %dx%d\n", rect->x, rect->y, rect->width, rect->height);
 337
 338         xcb_configure_window(conn, client->child, mask, &(rect->x));
 339
 340         /* After configuring a child window we need to fake a configure_notify_event (see ICCCM 4.2.3).
 341          * This is necessary to inform the client of its position relative to the root window,
 342          * not relative to its frame (as done in the configure_notify_event by the x server). */
 343         fake_absolute_configure_notify(conn, client);
 344
 345         /* Force redrawing after resizing the window because any now lost
 346          * pixels could contain old garbage. */
 347         xcb_expose_event_t generated;
 348         generated.window = client->frame;
 349         generated.count = 0;
 350         handle_expose_event(NULL, conn, &generated);
 351 }
 352
 353 /*
 354  * Renders the given container. Is called by render_layout() or individually (for example
 355  * when focus changes in a stacking container)
 356  *
 357  */
 358 void render_container(xcb_connection_t *conn, Container *container) {
 359         Client *client;
 360         int num_clients = 0, current_client = 0;
 361
 362         CIRCLEQ_FOREACH(client, &(container->clients), clients)
 363                 num_clients++;
 364
 365         if (container->mode == MODE_DEFAULT) {
 366                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 367                         /* If the client is in fullscreen mode, it does not get reconfigured */
 368                         if (container->workspace->fullscreen_client == client) {
 369                                 current_client++;
 370                                 continue;
 371                         }
 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), container->height / num_clients))
 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 > 0) {
 401                         LOG("remapping stack win\n");
 402                         xcb_map_window(conn, stack_win->window);
 403                 } else LOG("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                         LOG("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                 /* Check if we need to reconfigure our stack title window */
 421                 if (update_if_necessary(&(stack_win->rect.x), container->x) |
 422                     update_if_necessary(&(stack_win->rect.y), container->y) |
 423                     update_if_necessary(&(stack_win->rect.width), container->width) |
 424                     update_if_necessary(&(stack_win->rect.height), decoration_height * stack_lines)) {
 425
 426                         /* Configuration can happen in two slightly different ways:
 427
 428                            If there is no client in fullscreen mode, 5 parameters are passed
 429                            (x, y, width, height, stack mode is set to above which means top-most position).
 430
 431                            If there is a fullscreen client, the fourth parameter is set to to the
 432                            fullscreen window as sibling and the stack mode is set to below, which means
 433                            that the stack_window will be placed just below the sibling, that is, under
 434                            the fullscreen window.
 435                          */
 436                         uint32_t values[] = { stack_win->rect.x, stack_win->rect.y,
 437                                               stack_win->rect.width, stack_win->rect.height,
 438                                               XCB_STACK_MODE_ABOVE, XCB_STACK_MODE_BELOW };
 439                         uint32_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
 440                                         XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT |
 441                                         XCB_CONFIG_WINDOW_STACK_MODE;
 442
 443                         /* Raise the stack window, but keep it below the first floating client
 444                          * and below the fullscreen client (if any) */
 445                         Client *first_floating = TAILQ_FIRST(&(container->workspace->floating_clients));
 446                         if (first_floating != TAILQ_END(&(container->workspace->floating_clients))) {
 447                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 448                                 values[4] = first_floating->frame;
 449                         } else if (container->workspace->fullscreen_client != NULL) {
 450                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 451                                 values[4] = container->workspace->fullscreen_client->frame;
 452                         }
 453
 454                         xcb_configure_window(conn, stack_win->window, mask, values);
 455                 }
 456
 457                 /* Prepare the pixmap for usage */
 458                 cached_pixmap_prepare(conn, &(stack_win->pixmap));
 459
 460                 int current_row = 0, current_col = 0;
 461                 int wrap = 0;
 462
 463                 if (container->stack_limit == STACK_LIMIT_COLS) {
 464                         /* wrap stores the number of rows after which we will
 465                          * wrap to a new column. */
 466                         wrap = container->stack_limit_value;
 467                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 468                         /* When limiting rows, the wrap variable serves a
 469                          * slightly different purpose: it holds the number of
 470                          * pixels which each client will get. This is constant
 471                          * during the following loop, so it saves us some
 472                          * divisions and ceil()ing. */
 473                         wrap = (stack_win->rect.width / ceil((float)num_clients / container->stack_limit_value));
 474                 }
 475
 476                 /* Render the decorations of all clients */
 477                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 478                         /* If the client is in fullscreen mode, it does not get reconfigured */
 479                         if (container->workspace->fullscreen_client == client) {
 480                                 current_client++;
 481                                 continue;
 482                         }
 483
 484                         /* Check if we changed client->x or client->y by updating it.
 485                          * Note the bitwise OR instead of logical OR to force evaluation of all statements */
 486                         if (client->force_reconfigure |
 487                             update_if_necessary(&(client->rect.x), container->x) |
 488                             update_if_necessary(&(client->rect.y), container->y + (decoration_height * stack_lines)) |
 489                             update_if_necessary(&(client->rect.width), container->width) |
 490                             update_if_necessary(&(client->rect.height), container->height - (decoration_height * stack_lines)))
 491                                 resize_client(conn, client);
 492
 493                         client->force_reconfigure = false;
 494
 495                         int offset_x = 0;
 496                         int offset_y = 0;
 497                         if (container->mode == MODE_STACK ||
 498                             (container->mode == MODE_TABBED &&
 499                              container->stack_limit == STACK_LIMIT_COLS)) {
 500                                 if (container->stack_limit == STACK_LIMIT_COLS) {
 501                                         offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 502                                         offset_y = current_row * decoration_height;
 503                                         current_col++;
 504                                         if ((current_col % wrap) == 0) {
 505                                                 current_row++;
 506                                                 current_col = 0;
 507                                         }
 508                                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 509                                         offset_x = current_col * wrap;
 510                                         offset_y = current_row * decoration_height;
 511                                         current_row++;
 512                                         if ((current_row % container->stack_limit_value) == 0) {
 513                                                 current_col++;
 514                                                 current_row = 0;
 515                                         }
 516                                 } else {
 517                                         offset_y = current_client * decoration_height;
 518                                 }
 519                                 current_client++;
 520                         } else if (container->mode == MODE_TABBED) {
 521                                 if (container->stack_limit == STACK_LIMIT_ROWS) {
 522                                         LOG("You limited this container in its rows. "
 523                                             "This makes no sense in tabbing mode.\n");
 524                                 }
 525                                 offset_x = current_client++ * size_each;
 526                         }
 527                         decorate_window(conn, client, stack_win->pixmap.id, stack_win->pixmap.gc,
 528                                         offset_x, offset_y);
 529                 }
 530
 531                 /* Check if we need to fill one column because of an uneven
 532                  * amount of windows */
 533                 if (container->mode == MODE_STACK) {
 534                         if (container->stack_limit == STACK_LIMIT_COLS && (current_col % 2) != 0) {
 535                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 536
 537                                 int offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 538                                 int offset_y = current_row * decoration_height;
 539                                 xcb_rectangle_t rect = {offset_x, offset_y,
 540                                                         offset_x + container->width,
 541                                                         offset_y + decoration_height };
 542                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 543                         } else if (container->stack_limit == STACK_LIMIT_ROWS && (current_row % 2) != 0) {
 544                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 545
 546                                 int offset_x = current_col * wrap;
 547                                 int offset_y = current_row * decoration_height;
 548                                 xcb_rectangle_t rect = {offset_x, offset_y,
 549                                                         offset_x + container->width,
 550                                                         offset_y + decoration_height };
 551                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 552                         }
 553                 }
 554
 555                 xcb_copy_area(conn, stack_win->pixmap.id, stack_win->window, stack_win->pixmap.gc,
 556                               0, 0, 0, 0, stack_win->rect.width, stack_win->rect.height);
 557         }
 558 }
 559
 560 static void render_bars(xcb_connection_t *conn, Workspace *r_ws, int width, int *height) {
 561         Client *client;
 562         SLIST_FOREACH(client, &(r_ws->screen->dock_clients), dock_clients) {
 563                 LOG("client is at %d, should be at %d\n", client->rect.y, *height);
 564                 if (client->force_reconfigure |
 565                     update_if_necessary(&(client->rect.x), r_ws->rect.x) |
 566                     update_if_necessary(&(client->rect.y), *height))
 567                         reposition_client(conn, client);
 568
 569                 if (client->force_reconfigure |
 570                     update_if_necessary(&(client->rect.width), width) |
 571                     update_if_necessary(&(client->rect.height), client->desired_height))
 572                         resize_client(conn, client);
 573
 574                 client->force_reconfigure = false;
 575                 LOG("desired_height = %d\n", client->desired_height);
 576                 *height += client->desired_height;
 577         }
 578 }
 579
 580 static void render_internal_bar(xcb_connection_t *conn, Workspace *r_ws, int width, int height) {
 581         i3Font *font = load_font(conn, config.font);
 582         i3Screen *screen = r_ws->screen;
 583         enum { SET_NORMAL = 0, SET_FOCUSED = 1 };
 584
 585         /* Fill the whole bar in black */
 586         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 587         xcb_rectangle_t rect = {0, 0, width, height};
 588         xcb_poly_fill_rectangle(conn, screen->bar, screen->bargc, 1, &rect);
 589
 590         /* Set font */
 591         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FONT, font->id);
 592
 593         int drawn = 0;
 594         Workspace *ws;
 595         TAILQ_FOREACH(ws, workspaces, workspaces) {
 596                 if (ws->screen != screen)
 597                         continue;
 598
 599                 struct Colortriple *color;
 600
 601                 if (screen->current_workspace == ws)
 602                         color = &(config.bar.focused);
 603                 else if (ws->urgent)
 604                         color = &(config.bar.urgent);
 605                 else color = &(config.bar.unfocused);
 606
 607                 /* Draw the outer rect */
 608                 xcb_draw_rect(conn, screen->bar, screen->bargc, color->border,
 609                               drawn,              /* x */
 610                               1,                  /* y */
 611                               ws->text_width + 5 + 5, /* width = text width + 5 px left + 5px right */
 612                               height - 2          /* height = max. height - 1 px upper and 1 px bottom border */);
 613
 614                 /* Draw the background of this rect */
 615                 xcb_draw_rect(conn, screen->bar, screen->bargc, color->background,
 616                               drawn + 1,
 617                               2,
 618                               ws->text_width + 4 + 4,
 619                               height - 4);
 620
 621                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, color->text);
 622                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_BACKGROUND, color->background);
 623                 xcb_image_text_16(conn, ws->name_len, screen->bar, screen->bargc, drawn + 5 /* X */,
 624                                   font->height + 1 /* Y = baseline of font */,
 625                                   (xcb_char2b_t*)ws->name);
 626                 drawn += ws->text_width + 12;
 627         }
 628 }
 629
 630 /*
 631  * Modifies the event mask of all clients on the given workspace to either ignore or to handle
 632  * enter notifies. It is handy to ignore notifies because they will be sent when a window is mapped
 633  * under the cursor, thus when the user didn’t enter the window actively at all.
 634  *
 635  */
 636 void ignore_enter_notify_forall(xcb_connection_t *conn, Workspace *workspace, bool ignore_enter_notify) {
 637         Client *client;
 638         uint32_t values[1];
 639
 640         FOR_TABLE(workspace) {
 641                 if (workspace->table[cols][rows] == NULL)
 642                         continue;
 643
 644                 CIRCLEQ_FOREACH(client, &(workspace->table[cols][rows]->clients), clients) {
 645                         /* Change event mask for the decorations */
 646                         values[0] = FRAME_EVENT_MASK;
 647                         if (ignore_enter_notify)
 648                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 649                         xcb_change_window_attributes(conn, client->frame, XCB_CW_EVENT_MASK, values);
 650
 651                         /* Change event mask for the child itself */
 652                         values[0] = CHILD_EVENT_MASK;
 653                         if (ignore_enter_notify)
 654                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 655                         xcb_change_window_attributes(conn, client->child, XCB_CW_EVENT_MASK, values);
 656                 }
 657         }
 658 }
 659
 660 /*
 661  * Renders the given workspace on the given screen
 662  *
 663  */
 664 void render_workspace(xcb_connection_t *conn, i3Screen *screen, Workspace *r_ws) {
 665         i3Font *font = load_font(conn, config.font);
 666         int width = r_ws->rect.width;
 667         int height = r_ws->rect.height;
 668
 669         /* Reserve space for dock clients */
 670         Client *client;
 671         SLIST_FOREACH(client, &(screen->dock_clients), dock_clients)
 672                 height -= client->desired_height;
 673
 674         /* Space for the internal bar */
 675         height -= (font->height + 6);
 676
 677         int xoffset[r_ws->rows];
 678         int yoffset[r_ws->cols];
 679         /* Initialize offsets */
 680         for (int cols = 0; cols < r_ws->cols; cols++)
 681                 yoffset[cols] = r_ws->rect.y;
 682         for (int rows = 0; rows < r_ws->rows; rows++)
 683                 xoffset[rows] = r_ws->rect.x;
 684
 685         ignore_enter_notify_forall(conn, r_ws, true);
 686
 687         /* Go through the whole table and render what’s necessary */
 688         FOR_TABLE(r_ws) {
 689                 Container *container = r_ws->table[cols][rows];
 690                 if (container == NULL)
 691                         continue;
 692                 int single_width = -1, single_height = -1;
 693                 /* Update position of the container */
 694                 container->row = rows;
 695                 container->col = cols;
 696                 container->x = xoffset[rows];
 697                 container->y = yoffset[cols];
 698                 container->width = 0;
 699
 700                 for (int c = 0; c < container->colspan; c++) {
 701                         if (r_ws->width_factor[cols+c] == 0)
 702                                 container->width += (width / r_ws->cols);
 703                         else container->width += get_unoccupied_x(r_ws) * r_ws->width_factor[cols+c];
 704
 705                         if (single_width == -1)
 706                                 single_width = container->width;
 707                 }
 708
 709                 LOG("height is %d\n", height);
 710
 711                 container->height = 0;
 712
 713                 for (int c = 0; c < container->rowspan; c++) {
 714                         if (r_ws->height_factor[rows+c] == 0)
 715                                 container->height += (height / r_ws->rows);
 716                         else container->height += get_unoccupied_y(r_ws) * r_ws->height_factor[rows+c];
 717
 718                         if (single_height == -1)
 719                                 single_height = container->height;
 720                 }
 721
 722                 /* Render the container if it is not empty */
 723                 render_container(conn, container);
 724
 725                 xoffset[rows] += single_width;
 726                 yoffset[cols] += single_height;
 727         }
 728
 729         ignore_enter_notify_forall(conn, r_ws, false);
 730
 731         render_bars(conn, r_ws, width, &height);
 732         render_internal_bar(conn, r_ws, width, font->height + 6);
 733 }
 734
 735 /*
 736  * Renders the whole layout, that is: Go through each screen, each workspace, each container
 737  * and render each client. This also renders the bars.
 738  *
 739  * If you don’t need to render *everything*, you should call render_container on the container
 740  * you want to refresh.
 741  *
 742  */
 743 void render_layout(xcb_connection_t *conn) {
 744         i3Screen *screen;
 745
 746         if (virtual_screens == NULL)
 747                 return;
 748
 749         TAILQ_FOREACH(screen, virtual_screens, screens)
 750                 if (screen->current_workspace != NULL)
 751                         render_workspace(conn, screen, screen->current_workspace);
 752
 753         xcb_flush(conn);
 754 }