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

   1 /*
   2  * vim:ts=8:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  *
   6  * © 2009-2010 Michael Stapelberg and contributors
   7  *
   8  * See file LICENSE for license information.
   9  *
  10  * src/floating.c: contains all functions for handling floating clients
  11  *
  12  */
  13
  14
  15 #include "all.h"
  16
  17 extern xcb_connection_t *conn;
  18
  19 /*
  20  * Toggles floating mode for the given container.
  21  *
  22  * If the automatic flag is set to true, this was an automatic update by a change of the
  23  * window class from the application which can be overwritten by the user.
  24  *
  25  */
  26 void toggle_floating_mode(Con *con, bool automatic) {
  27         //i3Font *font = load_font(conn, config.font);
  28
  29         /* see if the client is already floating */
  30         if (con_is_floating(con)) {
  31                 LOG("already floating, re-setting to tiling\n");
  32                 assert(con->old_parent != NULL);
  33
  34                 /* 1: detach from parent container */
  35                 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
  36                 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
  37
  38                 /* 2: kill parent container */
  39                 TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
  40                 tree_close(con->parent);
  41
  42                 /* 3: re-attach to previous parent */
  43                 con->parent = con->old_parent;
  44                 TAILQ_INSERT_TAIL(&(con->parent->nodes_head), con, nodes);
  45                 TAILQ_INSERT_TAIL(&(con->parent->focus_head), con, focused);
  46
  47                 return;
  48         }
  49
  50         /* 1: detach the container from its parent */
  51         /* TODO: refactor this with tree_close() */
  52         TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
  53         TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
  54
  55         Con *child;
  56     int children = 0;
  57     TAILQ_FOREACH(child, &(con->parent->nodes_head), nodes)
  58         children++;
  59     /* TODO: better document why this math works */
  60     double fix = 1.0 / (1.0 - (1.0 / (children+1)));
  61     TAILQ_FOREACH(child, &(con->parent->nodes_head), nodes) {
  62         if (child->percent <= 0.0)
  63             continue;
  64         child->percent *= fix;
  65     }
  66
  67         /* 2: create a new container to render the decoration on, add
  68          * it as a floating window to the workspace */
  69         Con *nc = con_new(NULL);
  70         nc->parent = con_get_workspace(con);
  71         nc->rect = con->rect;
  72         nc->orientation = NO_ORIENTATION;
  73         nc->type = CT_FLOATING_CON;
  74         TAILQ_INSERT_TAIL(&(nc->parent->floating_head), nc, floating_windows);
  75
  76         /* 3: attach the child to the new parent container */
  77         con->old_parent = con->parent;
  78         con->parent = nc;
  79         con->floating = FLOATING_USER_ON;
  80         nc->rect.x = 400;
  81         nc->rect.y = 400;
  82         TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
  83         TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
  84
  85
  86
  87 #if 0
  88         if (client->dock) {
  89                 DLOG("Not putting dock client into floating mode\n");
  90                 return;
  91         }
  92
  93         if (con == NULL) {
  94                 DLOG("This client is already in floating (container == NULL), re-inserting\n");
  95                 Client *next_tiling;
  96                 Workspace *ws = client->workspace;
  97                 SLIST_FOREACH(next_tiling, &(ws->focus_stack), focus_clients)
  98                         if (!client_is_floating(next_tiling))
  99                                 break;
 100                 /* If there are no tiling clients on this workspace, there can only be one
 101                  * container: the first one */
 102                 if (next_tiling == TAILQ_END(&(ws->focus_stack)))
 103                         con = ws->table[0][0];
 104                 else con = next_tiling->container;
 105
 106                 /* Remove the client from the list of floating clients */
 107                 TAILQ_REMOVE(&(ws->floating_clients), client, floating_clients);
 108
 109                 DLOG("destination container = %p\n", con);
 110                 Client *old_focused = con->currently_focused;
 111                 /* Preserve position/size */
 112                 memcpy(&(client->floating_rect), &(client->rect), sizeof(Rect));
 113
 114                 client->floating = FLOATING_USER_OFF;
 115                 client->container = con;
 116
 117                 if (old_focused != NULL && !old_focused->dock)
 118                         CIRCLEQ_INSERT_AFTER(&(con->clients), old_focused, client, clients);
 119                 else CIRCLEQ_INSERT_TAIL(&(con->clients), client, clients);
 120
 121                 DLOG("Re-inserted the window.\n");
 122                 con->currently_focused = client;
 123
 124                 client_set_below_floating(conn, client);
 125
 126                 render_container(conn, con);
 127                 xcb_flush(conn);
 128
 129                 return;
 130         }
 131
 132         DLOG("Entering floating for client %08x\n", client->child);
 133
 134         /* Remove the client of its container */
 135         client_remove_from_container(conn, client, con, false);
 136         client->container = NULL;
 137
 138         /* Add the client to the list of floating clients for its workspace */
 139         TAILQ_INSERT_TAIL(&(client->workspace->floating_clients), client, floating_clients);
 140
 141         if (con->currently_focused == client) {
 142                 DLOG("Need to re-adjust currently_focused\n");
 143                 /* Get the next client in the focus stack for this particular container */
 144                 con->currently_focused = get_last_focused_client(conn, con, NULL);
 145         }
 146
 147         if (automatic)
 148                 client->floating = FLOATING_AUTO_ON;
 149         else client->floating = FLOATING_USER_ON;
 150
 151         /* Initialize the floating position from the position in tiling mode, if this
 152          * client never was floating (x == -1) */
 153         if (client->floating_rect.x == -1) {
 154                 /* Copy over the position */
 155                 client->floating_rect.x = client->rect.x;
 156                 client->floating_rect.y = client->rect.y;
 157
 158                 /* Copy size the other direction */
 159                 client->child_rect.width = client->floating_rect.width;
 160                 client->child_rect.height = client->floating_rect.height;
 161
 162                 client->rect.width = client->child_rect.width + 2 + 2;
 163                 client->rect.height = client->child_rect.height + (font->height + 2 + 2) + 2;
 164
 165                 DLOG("copying size from tiling (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 166                                 client->floating_rect.width, client->floating_rect.height);
 167         } else {
 168                 /* If the client was already in floating before we restore the old position / size */
 169                 DLOG("using: (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 170                         client->floating_rect.width, client->floating_rect.height);
 171                 memcpy(&(client->rect), &(client->floating_rect), sizeof(Rect));
 172         }
 173
 174         /* Raise the client */
 175         xcb_raise_window(conn, client->frame);
 176         reposition_client(conn, client);
 177         resize_client(conn, client);
 178         /* redecorate_window flushes */
 179         redecorate_window(conn, client);
 180
 181         /* Re-render the tiling layout of this container */
 182         render_container(conn, con);
 183         xcb_flush(conn);
 184 #endif
 185 }
 186
 187 #if 0
 188 /*
 189  * Removes the floating client from its workspace and attaches it to the new workspace.
 190  * This is centralized here because it may happen if you move it via keyboard and
 191  * if you move it using your mouse.
 192  *
 193  */
 194 void floating_assign_to_workspace(Client *client, Workspace *new_workspace) {
 195         /* Remove from focus stack and list of floating clients */
 196         SLIST_REMOVE(&(client->workspace->focus_stack), client, Client, focus_clients);
 197         TAILQ_REMOVE(&(client->workspace->floating_clients), client, floating_clients);
 198
 199         if (client->workspace->fullscreen_client == client)
 200                 client->workspace->fullscreen_client = NULL;
 201
 202         /* Insert into destination focus stack and list of floating clients */
 203         client->workspace = new_workspace;
 204         SLIST_INSERT_HEAD(&(client->workspace->focus_stack), client, focus_clients);
 205         TAILQ_INSERT_TAIL(&(client->workspace->floating_clients), client, floating_clients);
 206         if (client->fullscreen)
 207                 client->workspace->fullscreen_client = client;
 208 }
 209
 210 /*
 211  * This is an ugly data structure which we need because there is no standard
 212  * way of having nested functions (only available as a gcc extension at the
 213  * moment, clang doesn’t support it) or blocks (only available as a clang
 214  * extension and only on Mac OS X systems at the moment).
 215  *
 216  */
 217 struct resize_callback_params {
 218         border_t border;
 219         xcb_button_press_event_t *event;
 220 };
 221
 222 DRAGGING_CB(resize_callback) {
 223         struct resize_callback_params *params = extra;
 224         xcb_button_press_event_t *event = params->event;
 225         switch (params->border) {
 226                 case BORDER_RIGHT: {
 227                         int new_width = old_rect->width + (new_x - event->root_x);
 228                         if ((new_width < 0) ||
 229                             (new_width < client_min_width(client) && client->rect.width >= new_width))
 230                                 return;
 231                         client->rect.width = new_width;
 232                         break;
 233                 }
 234
 235                 case BORDER_BOTTOM: {
 236                         int new_height = old_rect->height + (new_y - event->root_y);
 237                         if ((new_height < 0) ||
 238                             (new_height < client_min_height(client) && client->rect.height >= new_height))
 239                                 return;
 240                         client->rect.height = old_rect->height + (new_y - event->root_y);
 241                         break;
 242                 }
 243
 244                 case BORDER_TOP: {
 245                         int new_height = old_rect->height + (event->root_y - new_y);
 246                         if ((new_height < 0) ||
 247                             (new_height < client_min_height(client) && client->rect.height >= new_height))
 248                                 return;
 249
 250                         client->rect.y = old_rect->y + (new_y - event->root_y);
 251                         client->rect.height = new_height;
 252                         break;
 253                 }
 254
 255                 case BORDER_LEFT: {
 256                         int new_width = old_rect->width + (event->root_x - new_x);
 257                         if ((new_width < 0) ||
 258                             (new_width < client_min_width(client) && client->rect.width >= new_width))
 259                                 return;
 260                         client->rect.x = old_rect->x + (new_x - event->root_x);
 261                         client->rect.width = new_width;
 262                         break;
 263                 }
 264         }
 265
 266         /* Push the new position/size to X11 */
 267         reposition_client(conn, client);
 268         resize_client(conn, client);
 269         xcb_flush(conn);
 270 }
 271
 272
 273 /*
 274  * Called whenever the user clicks on a border (not the titlebar!) of a floating window.
 275  * Determines on which border the user clicked and launches the drag_pointer function
 276  * with the resize_callback.
 277  *
 278  */
 279 int floating_border_click(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 280         DLOG("floating border click\n");
 281
 282         border_t border;
 283
 284         if (event->event_y < 2)
 285                 border = BORDER_TOP;
 286         else if (event->event_y >= (client->rect.height - 2))
 287                 border = BORDER_BOTTOM;
 288         else if (event->event_x <= 2)
 289                 border = BORDER_LEFT;
 290         else if (event->event_x >= (client->rect.width - 2))
 291                 border = BORDER_RIGHT;
 292         else {
 293                 DLOG("Not on any border, not doing anything.\n");
 294                 return 1;
 295         }
 296
 297         DLOG("border = %d\n", border);
 298
 299         struct resize_callback_params params = { border, event };
 300
 301         drag_pointer(conn, client, event, XCB_NONE, border, resize_callback, &params);
 302
 303         return 1;
 304 }
 305
 306 #endif
 307 DRAGGING_CB(drag_window_callback) {
 308         struct xcb_button_press_event_t *event = extra;
 309
 310         /* Reposition the client correctly while moving */
 311         con->rect.x = old_rect->x + (new_x - event->root_x);
 312         con->rect.y = old_rect->y + (new_y - event->root_y);
 313         //reposition_client(conn, con);
 314         /* Because reposition_client does not send a faked configure event (only resize does),
 315          * we need to initiate that on our own */
 316         //fake_absolute_configure_notify(conn, client);
 317         /* fake_absolute_configure_notify flushes */
 318 }
 319
 320 /*
 321  * Called when the user clicked on the titlebar of a floating window.
 322  * Calls the drag_pointer function with the drag_window callback
 323  *
 324  */
 325 void floating_drag_window(Con *con, xcb_button_press_event_t *event) {
 326         DLOG("floating_drag_window\n");
 327
 328         drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback, event);
 329         tree_render();
 330 }
 331
 332 #if 0
 333 /*
 334  * This is an ugly data structure which we need because there is no standard
 335  * way of having nested functions (only available as a gcc extension at the
 336  * moment, clang doesn’t support it) or blocks (only available as a clang
 337  * extension and only on Mac OS X systems at the moment).
 338  *
 339  */
 340 struct resize_window_callback_params {
 341         border_t corner;
 342         bool proportional;
 343         xcb_button_press_event_t *event;
 344 };
 345
 346 DRAGGING_CB(resize_window_callback) {
 347         struct resize_window_callback_params *params = extra;
 348         xcb_button_press_event_t *event = params->event;
 349         border_t corner = params->corner;
 350
 351         int32_t dest_x = client->rect.x;
 352         int32_t dest_y = client->rect.y;
 353         uint32_t dest_width;
 354         uint32_t dest_height;
 355
 356         double ratio = (double) old_rect->width / old_rect->height;
 357
 358         /* First guess: We resize by exactly the amount the mouse moved,
 359          * taking into account in which corner the client was grabbed */
 360         if (corner & BORDER_LEFT)
 361                 dest_width = old_rect->width - (new_x - event->root_x);
 362         else dest_width = old_rect->width + (new_x - event->root_x);
 363
 364         if (corner & BORDER_TOP)
 365                 dest_height = old_rect->height - (new_y - event->root_y);
 366         else dest_height = old_rect->height + (new_y - event->root_y);
 367
 368         /* Obey minimum window size */
 369         dest_width = max(dest_width, client_min_width(client));
 370         dest_height = max(dest_height, client_min_height(client));
 371
 372         /* User wants to keep proportions, so we may have to adjust our values */
 373         if (params->proportional) {
 374                 dest_width = max(dest_width, (int) (dest_height * ratio));
 375                 dest_height = max(dest_height, (int) (dest_width / ratio));
 376         }
 377
 378         /* If not the lower right corner is grabbed, we must also reposition
 379          * the client by exactly the amount we resized it */
 380         if (corner & BORDER_LEFT)
 381                 dest_x = old_rect->x + (old_rect->width - dest_width);
 382
 383         if (corner & BORDER_TOP)
 384                 dest_y = old_rect->y + (old_rect->height - dest_height);
 385
 386         client->rect = (Rect) { dest_x, dest_y, dest_width, dest_height };
 387
 388         /* resize_client flushes */
 389         resize_client(conn, client);
 390 }
 391
 392 /*
 393  * Called when the user clicked on a floating window while holding the
 394  * floating_modifier and the right mouse button.
 395  * Calls the drag_pointer function with the resize_window callback
 396  *
 397  */
 398 void floating_resize_window(xcb_connection_t *conn, Client *client,
 399                             bool proportional, xcb_button_press_event_t *event) {
 400         DLOG("floating_resize_window\n");
 401
 402         /* corner saves the nearest corner to the original click. It contains
 403          * a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
 404         border_t corner = 0;
 405
 406         if (event->event_x <= (client->rect.width / 2))
 407                 corner |= BORDER_LEFT;
 408         else corner |= BORDER_RIGHT;
 409
 410         if (event->event_y <= (client->rect.height / 2))
 411                 corner |= BORDER_TOP;
 412         else corner |= BORDER_RIGHT;
 413
 414         struct resize_window_callback_params params = { corner, proportional, event };
 415
 416         drag_pointer(conn, client, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback, &params);
 417 }
 418
 419 #endif
 420 /*
 421  * This function grabs your pointer and lets you drag stuff around (borders).
 422  * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
 423  * and the given callback will be called with the parameters specified (client,
 424  * border on which the click originally was), the original rect of the client,
 425  * the event and the new coordinates (x, y).
 426  *
 427  */
 428 void drag_pointer(Con *con, xcb_button_press_event_t *event, xcb_window_t
 429                 confine_to, border_t border, callback_t callback, void *extra)
 430 {
 431         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 432         uint32_t new_x, new_y;
 433         Rect old_rect;
 434         if (con != NULL)
 435                 memcpy(&old_rect, &(con->rect), sizeof(Rect));
 436
 437         /* Grab the pointer */
 438         /* TODO: returncode */
 439         xcb_grab_pointer(conn,
 440                         false,               /* get all pointer events specified by the following mask */
 441                         root,                /* grab the root window */
 442                         XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
 443                         XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
 444                         XCB_GRAB_MODE_ASYNC, /* keyboard mode */
 445                         confine_to,          /* confine_to = in which window should the cursor stay */
 446                         XCB_NONE,            /* don’t display a special cursor */
 447                         XCB_CURRENT_TIME);
 448
 449         /* Go into our own event loop */
 450         xcb_flush(conn);
 451
 452         xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
 453         /* I’ve always wanted to have my own eventhandler… */
 454         while ((inside_event = xcb_wait_for_event(conn))) {
 455                 /* We now handle all events we can get using xcb_poll_for_event */
 456                 do {
 457                         /* Same as get_event_handler in xcb */
 458                         int nr = inside_event->response_type;
 459                         if (nr == 0) {
 460                                 /* An error occured */
 461                                 //handle_event(NULL, conn, inside_event);
 462                                 free(inside_event);
 463                                 continue;
 464                         }
 465                         assert(nr < 256);
 466                         nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 467                         assert(nr >= 2);
 468
 469                         switch (nr) {
 470                                 case XCB_BUTTON_RELEASE:
 471                                         goto done;
 472
 473                                 case XCB_MOTION_NOTIFY:
 474                                         /* motion_notify events are saved for later */
 475                                         FREE(last_motion_notify);
 476                                         last_motion_notify = inside_event;
 477                                         break;
 478
 479                                 case XCB_UNMAP_NOTIFY:
 480                                         DLOG("Unmap-notify, aborting\n");
 481                                         xcb_event_handle(&evenths, inside_event);
 482                                         goto done;
 483
 484                                 default:
 485                                         DLOG("Passing to original handler\n");
 486                                         /* Use original handler */
 487                                         xcb_event_handle(&evenths, inside_event);
 488                                         break;
 489                         }
 490                         if (last_motion_notify != inside_event)
 491                                 free(inside_event);
 492                 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
 493
 494                 if (last_motion_notify == NULL)
 495                         continue;
 496
 497                 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
 498                 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
 499
 500                 callback(con, &old_rect, new_x, new_y, extra);
 501                 FREE(last_motion_notify);
 502         }
 503 done:
 504         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 505         xcb_flush(conn);
 506 }
 507
 508 #if 0
 509 /*
 510  * Changes focus in the given direction for floating clients.
 511  *
 512  * Changing to the left/right means going to the previous/next floating client,
 513  * changing to top/bottom means cycling through the Z-index.
 514  *
 515  */
 516 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 517         DLOG("floating focus\n");
 518
 519         if (direction == D_LEFT || direction == D_RIGHT) {
 520                 /* Go to the next/previous floating client */
 521                 Client *client;
 522
 523                 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
 524                                                         TAILQ_NEXT(currently_focused, floating_clients))) !=
 525                        TAILQ_END(&(currently_focused->workspace->floating_clients))) {
 526                         if (!client->floating)
 527                                 continue;
 528                         set_focus(conn, client, true);
 529                         return;
 530                 }
 531         }
 532 }
 533
 534 /*
 535  * Moves the client 10px to the specified direction.
 536  *
 537  */
 538 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 539         DLOG("floating move\n");
 540
 541         Rect destination = currently_focused->rect;
 542         Rect *screen = &(currently_focused->workspace->output->rect);
 543
 544         switch (direction) {
 545                 case D_LEFT:
 546                         destination.x -= 10;
 547                         break;
 548                 case D_RIGHT:
 549                         destination.x += 10;
 550                         break;
 551                 case D_UP:
 552                         destination.y -= 10;
 553                         break;
 554                 case D_DOWN:
 555                         destination.y += 10;
 556                         break;
 557                 /* to make static analyzers happy */
 558                 default:
 559                         break;
 560         }
 561
 562         /* Prevent windows from vanishing completely */
 563         if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
 564             (int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
 565             (int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
 566             (int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
 567                 DLOG("boundary check failed, not moving\n");
 568                 return;
 569         }
 570
 571         currently_focused->rect = destination;
 572         reposition_client(conn, currently_focused);
 573
 574         /* Because reposition_client does not send a faked configure event (only resize does),
 575          * we need to initiate that on our own */
 576         fake_absolute_configure_notify(conn, currently_focused);
 577         /* fake_absolute_configure_notify flushes */
 578 }
 579
 580 /*
 581  * Hides all floating clients (or show them if they are currently hidden) on
 582  * the specified workspace.
 583  *
 584  */
 585 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
 586         Client *client;
 587
 588         workspace->floating_hidden = !workspace->floating_hidden;
 589         DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
 590         TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
 591                 if (workspace->floating_hidden)
 592                         client_unmap(conn, client);
 593                 else client_map(conn, client);
 594         }
 595
 596         /* If we just unmapped all floating windows we should ensure that the focus
 597          * is set correctly, that ist, to the first non-floating client in stack */
 598         if (workspace->floating_hidden)
 599                 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
 600                         if (client_is_floating(client))
 601                                 continue;
 602                         set_focus(conn, client, true);
 603                         return;
 604                 }
 605
 606         xcb_flush(conn);
 607 }
 608 #endif