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_set_window_rect(conn, client->frame, client->rect);
 250
 251         /* Adjust the position of the child inside its frame.
 252          * The coordinates of the child are relative to its frame, we
 253          * add a border of 2 pixel to each value */
 254         Rect *rect = &(client->child_rect);
 255         switch (container_mode(client->container, true)) {
 256                 case MODE_STACK:
 257                 case MODE_TABBED:
 258                         rect->x = 2;
 259                         rect->y = 0;
 260                         rect->width = client->rect.width - (2 + 2);
 261                         rect->height = client->rect.height - 2;
 262                         break;
 263                 default:
 264                         if (client->titlebar_position == TITLEBAR_OFF && client->borderless) {
 265                                 rect->x = 0;
 266                                 rect->y = 0;
 267                                 rect->width = client->rect.width;
 268                                 rect->height = client->rect.height;
 269                         } else if (client->titlebar_position == TITLEBAR_OFF && !client->borderless) {
 270                                 rect->x = 1;
 271                                 rect->y = 1;
 272                                 rect->width = client->rect.width - 1 - 1;
 273                                 rect->height = client->rect.height - 1 - 1;
 274                         } else {
 275                                 rect->x = 2;
 276                                 rect->y = font->height + 2 + 2;
 277                                 rect->width = client->rect.width - (2 + 2);
 278                                 rect->height = client->rect.height - ((font->height + 2 + 2) + 2);
 279                         }
 280                         break;
 281         }
 282
 283         rect->width -= (2 * client->border_width);
 284         rect->height -= (2 * client->border_width);
 285
 286         /* Obey the ratio, if any */
 287         if (client->proportional_height != 0 &&
 288             client->proportional_width != 0) {
 289                 DLOG("proportional height = %d, width = %d\n", client->proportional_height, client->proportional_width);
 290                 double new_height = rect->height + 1;
 291                 int new_width = rect->width;
 292
 293                 while (new_height > rect->height) {
 294                         new_height = ((double)client->proportional_height / client->proportional_width) * new_width;
 295
 296                         if (new_height > rect->height)
 297                                 new_width--;
 298                 }
 299                 /* Center the window */
 300                 rect->y += ceil(rect->height / 2) - floor(new_height / 2);
 301                 rect->x += ceil(rect->width / 2) - floor(new_width / 2);
 302
 303                 rect->height = new_height;
 304                 rect->width = new_width;
 305                 DLOG("new_height = %f, new_width = %d\n", new_height, new_width);
 306         }
 307
 308         if (client->height_increment > 1) {
 309                 int old_height = rect->height;
 310                 rect->height -= (rect->height - client->base_height) % client->height_increment;
 311                 DLOG("Lost %d pixel due to client's height_increment (%d px, base_height = %d)\n",
 312                     old_height - rect->height, client->height_increment, client->base_height);
 313         }
 314
 315         if (client->width_increment > 1) {
 316                 int old_width = rect->width;
 317                 rect->width -= (rect->width - client->base_width) % client->width_increment;
 318                 DLOG("Lost %d pixel due to client's width_increment (%d px, base_width = %d)\n",
 319                     old_width - rect->width, client->width_increment, client->base_width);
 320         }
 321
 322         DLOG("child will be at %dx%d with size %dx%d\n", rect->x, rect->y, rect->width, rect->height);
 323
 324         xcb_set_window_rect(conn, client->child, *rect);
 325
 326         /* After configuring a child window we need to fake a configure_notify_event (see ICCCM 4.2.3).
 327          * This is necessary to inform the client of its position relative to the root window,
 328          * not relative to its frame (as done in the configure_notify_event by the x server). */
 329         fake_absolute_configure_notify(conn, client);
 330
 331         /* Force redrawing after resizing the window because any now lost
 332          * pixels could contain old garbage. */
 333         xcb_expose_event_t generated;
 334         generated.window = client->frame;
 335         generated.count = 0;
 336         handle_expose_event(NULL, conn, &generated);
 337 }
 338
 339 /*
 340  * Renders the given container. Is called by render_layout() or individually (for example
 341  * when focus changes in a stacking container)
 342  *
 343  */
 344 void render_container(xcb_connection_t *conn, Container *container) {
 345         Client *client;
 346         int num_clients = 0, current_client = 0;
 347
 348         CIRCLEQ_FOREACH(client, &(container->clients), clients)
 349                 num_clients++;
 350
 351         if (container->mode == MODE_DEFAULT) {
 352                 int height = (container->height / max(1, num_clients));
 353                 int rest_pixels = (container->height % max(1, num_clients));
 354                 DLOG("height per client = %d, rest = %d\n", height, rest_pixels);
 355
 356                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 357                         /* If the client is in fullscreen mode, it does not get reconfigured */
 358                         if (container->workspace->fullscreen_client == client) {
 359                                 current_client++;
 360                                 continue;
 361                         }
 362
 363                         /* If we have some pixels left to distribute, add one
 364                          * pixel to each client as long as possible. */
 365                         int this_height = height;
 366                         if (rest_pixels > 0) {
 367                                 height++;
 368                                 rest_pixels--;
 369                         }
 370                         /* Check if we changed client->x or client->y by updating it.
 371                          * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 372                         if (client->force_reconfigure |
 373                             update_if_necessary(&(client->rect.x), container->x) |
 374                             update_if_necessary(&(client->rect.y), container->y +
 375                                         (container->height / num_clients) * current_client) |
 376                             update_if_necessary(&(client->rect.width), container->width) |
 377                             update_if_necessary(&(client->rect.height), this_height))
 378                                 resize_client(conn, client);
 379
 380                         /* TODO: vertical default layout */
 381
 382                         client->force_reconfigure = false;
 383
 384                         current_client++;
 385                 }
 386         } else {
 387                 i3Font *font = load_font(conn, config.font);
 388                 int decoration_height = (font->height + 2 + 2);
 389                 struct Stack_Window *stack_win = &(container->stack_win);
 390                 /* The size for each tab (width), necessary as a separate variable
 391                  * because num_clients gets fixed to 1 in tabbed mode. */
 392                 int size_each = (num_clients == 0 ? container->width : container->width / num_clients);
 393                 int stack_lines = num_clients;
 394
 395                 /* Check if we need to remap our stack title window, it gets unmapped when the container
 396                    is empty in src/handlers.c:unmap_notify() */
 397                 if (stack_win->rect.height == 0 && num_clients > 1) {
 398                         DLOG("remapping stack win\n");
 399                         xcb_map_window(conn, stack_win->window);
 400                 } else DLOG("not remapping stackwin, height = %d, num_clients = %d\n",
 401                                 stack_win->rect.height, num_clients);
 402
 403                 if (container->mode == MODE_TABBED) {
 404                         /* By setting num_clients to 1 we force that the stack window will be only one line
 405                          * high. The rest of the code is useful in both cases. */
 406                         DLOG("tabbed mode, setting num_clients = 1\n");
 407                         if (stack_lines > 1)
 408                                 stack_lines = 1;
 409                 }
 410
 411                 if (container->stack_limit == STACK_LIMIT_COLS) {
 412                         stack_lines = ceil((float)num_clients / container->stack_limit_value);
 413                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 414                         stack_lines = min(num_clients, container->stack_limit_value);
 415                 }
 416
 417                 int height = decoration_height * stack_lines;
 418                 if (num_clients == 1) {
 419                         height = 0;
 420                         stack_win->rect.height = 0;
 421                         xcb_unmap_window(conn, stack_win->window);
 422
 423                         DLOG("Just one client, setting height to %d\n", height);
 424                 }
 425
 426                 /* Check if we need to reconfigure our stack title window */
 427                 if (height > 0 && (
 428                      update_if_necessary(&(stack_win->rect.x), container->x) |
 429                      update_if_necessary(&(stack_win->rect.y), container->y) |
 430                      update_if_necessary(&(stack_win->rect.width), container->width) |
 431                      update_if_necessary(&(stack_win->rect.height), height))) {
 432
 433                         /* Configuration can happen in two slightly different ways:
 434
 435                            If there is no client in fullscreen mode, 5 parameters are passed
 436                            (x, y, width, height, stack mode is set to above which means top-most position).
 437
 438                            If there is a fullscreen client, the fourth parameter is set to to the
 439                            fullscreen window as sibling and the stack mode is set to below, which means
 440                            that the stack_window will be placed just below the sibling, that is, under
 441                            the fullscreen window.
 442                          */
 443                         uint32_t values[] = { stack_win->rect.x, stack_win->rect.y,
 444                                               stack_win->rect.width, stack_win->rect.height,
 445                                               XCB_STACK_MODE_ABOVE, XCB_STACK_MODE_BELOW };
 446                         uint32_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
 447                                         XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT |
 448                                         XCB_CONFIG_WINDOW_STACK_MODE;
 449
 450                         /* Raise the stack window, but keep it below the first floating client
 451                          * and below the fullscreen client (if any) */
 452                         Client *first_floating = TAILQ_FIRST(&(container->workspace->floating_clients));
 453                         if (first_floating != TAILQ_END(&(container->workspace->floating_clients))) {
 454                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 455                                 values[4] = first_floating->frame;
 456                         } else if (container->workspace->fullscreen_client != NULL) {
 457                                 mask |= XCB_CONFIG_WINDOW_SIBLING;
 458                                 values[4] = container->workspace->fullscreen_client->frame;
 459                         }
 460
 461                         xcb_configure_window(conn, stack_win->window, mask, values);
 462                 }
 463
 464                 /* Prepare the pixmap for usage */
 465                 cached_pixmap_prepare(conn, &(stack_win->pixmap));
 466
 467                 int current_row = 0, current_col = 0;
 468                 int wrap = 0;
 469
 470                 if (container->stack_limit == STACK_LIMIT_COLS) {
 471                         /* wrap stores the number of rows after which we will
 472                          * wrap to a new column. */
 473                         wrap = ceil((float)num_clients / container->stack_limit_value);
 474                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 475                         /* When limiting rows, the wrap variable serves a
 476                          * slightly different purpose: it holds the number of
 477                          * pixels which each client will get. This is constant
 478                          * during the following loop, so it saves us some
 479                          * divisions and ceil()ing. */
 480                         wrap = (stack_win->rect.width / ceil((float)num_clients / container->stack_limit_value));
 481                 }
 482
 483                 /* Render the decorations of all clients */
 484                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 485                         /* If the client is in fullscreen mode, it does not get reconfigured */
 486                         if (container->workspace->fullscreen_client == client) {
 487                                 current_client++;
 488                                 continue;
 489                         }
 490
 491                         /* Check if we changed client->x or client->y by updating it.
 492                          * Note the bitwise OR instead of logical OR to force evaluation of all statements */
 493                         if (client->force_reconfigure |
 494                             update_if_necessary(&(client->rect.x), container->x) |
 495                             update_if_necessary(&(client->rect.y), container->y + height) |
 496                             update_if_necessary(&(client->rect.width), container->width) |
 497                             update_if_necessary(&(client->rect.height), container->height - height))
 498                                 resize_client(conn, client);
 499
 500                         client->force_reconfigure = false;
 501
 502                         int offset_x = 0;
 503                         int offset_y = 0;
 504                         if (container->mode == MODE_STACK ||
 505                             (container->mode == MODE_TABBED &&
 506                              container->stack_limit == STACK_LIMIT_COLS)) {
 507                                 if (container->stack_limit == STACK_LIMIT_COLS) {
 508                                         offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 509                                         offset_y = current_row * decoration_height;
 510                                         current_row++;
 511                                         if ((current_row % wrap) == 0) {
 512                                                 current_col++;
 513                                                 current_row = 0;
 514                                         }
 515                                 } else if (container->stack_limit == STACK_LIMIT_ROWS) {
 516                                         offset_x = current_col * wrap;
 517                                         offset_y = current_row * decoration_height;
 518                                         current_row++;
 519                                         if ((current_row % container->stack_limit_value) == 0) {
 520                                                 current_col++;
 521                                                 current_row = 0;
 522                                         }
 523                                 } else {
 524                                         offset_y = current_client * decoration_height;
 525                                 }
 526                                 current_client++;
 527                         } else if (container->mode == MODE_TABBED) {
 528                                 if (container->stack_limit == STACK_LIMIT_ROWS) {
 529                                         LOG("You limited a tabbed container in its rows. "
 530                                             "This makes no sense in tabbing mode.\n");
 531                                 }
 532                                 offset_x = current_client++ * size_each;
 533                         }
 534                         decorate_window(conn, client, stack_win->pixmap.id, stack_win->pixmap.gc,
 535                                         offset_x, offset_y);
 536                 }
 537
 538                 /* Check if we need to fill one column because of an uneven
 539                  * amount of windows */
 540                 if (container->mode == MODE_STACK) {
 541                         if (container->stack_limit == STACK_LIMIT_COLS && (current_col % 2) != 0) {
 542                                 xcb_change_gc_single(conn, stack_win->pixmap.gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 543
 544                                 int offset_x = current_col * (stack_win->rect.width / container->stack_limit_value);
 545                                 int offset_y = current_row * decoration_height;
 546                                 xcb_rectangle_t rect = {offset_x, offset_y,
 547                                                         offset_x + container->width,
 548                                                         offset_y + decoration_height };
 549                                 xcb_poly_fill_rectangle(conn, stack_win->pixmap.id, stack_win->pixmap.gc, 1, &rect);
 550                         } else if (container->stack_limit == STACK_LIMIT_ROWS && (current_row % 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 * wrap;
 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                         }
 560                 }
 561
 562                 xcb_copy_area(conn, stack_win->pixmap.id, stack_win->window, stack_win->pixmap.gc,
 563                               0, 0, 0, 0, stack_win->rect.width, stack_win->rect.height);
 564         }
 565 }
 566
 567 static void render_bars(xcb_connection_t *conn, Workspace *r_ws, int width, int *height) {
 568         Client *client;
 569         SLIST_FOREACH(client, &(r_ws->screen->dock_clients), dock_clients) {
 570                 DLOG("client is at %d, should be at %d\n", client->rect.y, *height);
 571                 if (client->force_reconfigure |
 572                     update_if_necessary(&(client->rect.x), r_ws->rect.x) |
 573                     update_if_necessary(&(client->rect.y), *height))
 574                         reposition_client(conn, client);
 575
 576                 if (client->force_reconfigure |
 577                     update_if_necessary(&(client->rect.width), width) |
 578                     update_if_necessary(&(client->rect.height), client->desired_height))
 579                         resize_client(conn, client);
 580
 581                 client->force_reconfigure = false;
 582                 DLOG("desired_height = %d\n", client->desired_height);
 583                 *height += client->desired_height;
 584         }
 585 }
 586
 587 static void render_internal_bar(xcb_connection_t *conn, Workspace *r_ws, int width, int height) {
 588         i3Font *font = load_font(conn, config.font);
 589         i3Screen *screen = r_ws->screen;
 590         enum { SET_NORMAL = 0, SET_FOCUSED = 1 };
 591
 592         /* Fill the whole bar in black */
 593         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 594         xcb_rectangle_t rect = {0, 0, width, height};
 595         xcb_poly_fill_rectangle(conn, screen->bar, screen->bargc, 1, &rect);
 596
 597         /* Set font */
 598         xcb_change_gc_single(conn, screen->bargc, XCB_GC_FONT, font->id);
 599
 600         int drawn = 0;
 601         Workspace *ws;
 602         TAILQ_FOREACH(ws, workspaces, workspaces) {
 603                 if (ws->screen != screen)
 604                         continue;
 605
 606                 struct Colortriple *color;
 607
 608                 if (screen->current_workspace == ws)
 609                         color = &(config.bar.focused);
 610                 else if (ws->urgent)
 611                         color = &(config.bar.urgent);
 612                 else color = &(config.bar.unfocused);
 613
 614                 /* Draw the outer rect */
 615                 xcb_draw_rect(conn, screen->bar, screen->bargc, color->border,
 616                               drawn,              /* x */
 617                               1,                  /* y */
 618                               ws->text_width + 5 + 5, /* width = text width + 5 px left + 5px right */
 619                               height - 2          /* height = max. height - 1 px upper and 1 px bottom border */);
 620
 621                 /* Draw the background of this rect */
 622                 xcb_draw_rect(conn, screen->bar, screen->bargc, color->background,
 623                               drawn + 1,
 624                               2,
 625                               ws->text_width + 4 + 4,
 626                               height - 4);
 627
 628                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, color->text);
 629                 xcb_change_gc_single(conn, screen->bargc, XCB_GC_BACKGROUND, color->background);
 630                 xcb_image_text_16(conn, ws->name_len, screen->bar, screen->bargc, drawn + 5 /* X */,
 631                                   font->height + 1 /* Y = baseline of font */,
 632                                   (xcb_char2b_t*)ws->name);
 633                 drawn += ws->text_width + 12;
 634         }
 635 }
 636
 637 /*
 638  * Modifies the event mask of all clients on the given workspace to either ignore or to handle
 639  * enter notifies. It is handy to ignore notifies because they will be sent when a window is mapped
 640  * under the cursor, thus when the user didn’t enter the window actively at all.
 641  *
 642  */
 643 void ignore_enter_notify_forall(xcb_connection_t *conn, Workspace *workspace, bool ignore_enter_notify) {
 644         Client *client;
 645         uint32_t values[1];
 646
 647         FOR_TABLE(workspace) {
 648                 if (workspace->table[cols][rows] == NULL)
 649                         continue;
 650
 651                 CIRCLEQ_FOREACH(client, &(workspace->table[cols][rows]->clients), clients) {
 652                         /* Change event mask for the decorations */
 653                         values[0] = FRAME_EVENT_MASK;
 654                         if (ignore_enter_notify)
 655                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 656                         xcb_change_window_attributes(conn, client->frame, XCB_CW_EVENT_MASK, values);
 657
 658                         /* Change event mask for the child itself */
 659                         values[0] = CHILD_EVENT_MASK;
 660                         if (ignore_enter_notify)
 661                                 values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
 662                         xcb_change_window_attributes(conn, client->child, XCB_CW_EVENT_MASK, values);
 663                 }
 664         }
 665 }
 666
 667 /*
 668  * Renders the given workspace on the given screen
 669  *
 670  */
 671 void render_workspace(xcb_connection_t *conn, i3Screen *screen, Workspace *r_ws) {
 672         i3Font *font = load_font(conn, config.font);
 673         int width = r_ws->rect.width;
 674         int height = r_ws->rect.height;
 675
 676         /* Reserve space for dock clients */
 677         Client *client;
 678         SLIST_FOREACH(client, &(screen->dock_clients), dock_clients)
 679                 height -= client->desired_height;
 680
 681         /* Space for the internal bar */
 682         height -= (font->height + 6);
 683
 684         int xoffset[r_ws->rows];
 685         int yoffset[r_ws->cols];
 686         /* Initialize offsets */
 687         for (int cols = 0; cols < r_ws->cols; cols++)
 688                 yoffset[cols] = r_ws->rect.y;
 689         for (int rows = 0; rows < r_ws->rows; rows++)
 690                 xoffset[rows] = r_ws->rect.x;
 691
 692         ignore_enter_notify_forall(conn, r_ws, true);
 693
 694         /* Go through the whole table and render what’s necessary */
 695         FOR_TABLE(r_ws) {
 696                 Container *container = r_ws->table[cols][rows];
 697                 if (container == NULL)
 698                         continue;
 699                 int single_width = -1, single_height = -1;
 700                 /* Update position of the container */
 701                 container->row = rows;
 702                 container->col = cols;
 703                 container->x = xoffset[rows];
 704                 container->y = yoffset[cols];
 705                 container->width = 0;
 706
 707                 for (int c = 0; c < container->colspan; c++) {
 708                         if (r_ws->width_factor[cols+c] == 0)
 709                                 container->width += (width / r_ws->cols);
 710                         else container->width += get_unoccupied_x(r_ws) * r_ws->width_factor[cols+c];
 711
 712                         if (single_width == -1)
 713                                 single_width = container->width;
 714                 }
 715
 716                 DLOG("height is %d\n", height);
 717
 718                 container->height = 0;
 719
 720                 for (int c = 0; c < container->rowspan; c++) {
 721                         if (r_ws->height_factor[rows+c] == 0)
 722                                 container->height += (height / r_ws->rows);
 723                         else container->height += get_unoccupied_y(r_ws) * r_ws->height_factor[rows+c];
 724
 725                         if (single_height == -1)
 726                                 single_height = container->height;
 727                 }
 728
 729                 /* Render the container if it is not empty */
 730                 render_container(conn, container);
 731
 732                 xoffset[rows] += single_width;
 733                 yoffset[cols] += single_height;
 734         }
 735
 736         ignore_enter_notify_forall(conn, r_ws, false);
 737
 738         render_bars(conn, r_ws, width, &height);
 739         render_internal_bar(conn, r_ws, width, font->height + 6);
 740 }
 741
 742 /*
 743  * Renders the whole layout, that is: Go through each screen, each workspace, each container
 744  * and render each client. This also renders the bars.
 745  *
 746  * If you don’t need to render *everything*, you should call render_container on the container
 747  * you want to refresh.
 748  *
 749  */
 750 void render_layout(xcb_connection_t *conn) {
 751         i3Screen *screen;
 752
 753         if (virtual_screens == NULL)
 754                 return;
 755
 756         TAILQ_FOREACH(screen, virtual_screens, screens)
 757                 if (screen->current_workspace != NULL)
 758                         render_workspace(conn, screen, screen->current_workspace);
 759
 760         xcb_flush(conn);
 761 }