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 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 #include <stdlib.h>
  14 #include <string.h>
  15 #include <assert.h>
  16
  17 #include <xcb/xcb.h>
  18 #include <xcb/xcb_event.h>
  19
  20 #include "i3.h"
  21 #include "config.h"
  22 #include "data.h"
  23 #include "util.h"
  24 #include "xcb.h"
  25 #include "debug.h"
  26 #include "layout.h"
  27 #include "client.h"
  28 #include "floating.h"
  29 #include "workspace.h"
  30
  31 /*
  32  * Toggles floating mode for the given client.
  33  * Correctly takes care of the position/size (separately stored for tiling/floating mode)
  34  * and repositions/resizes/redecorates the client.
  35  *
  36  * If the automatic flag is set to true, this was an automatic update by a change of the
  37  * window class from the application which can be overwritten by the user.
  38  *
  39  */
  40 void toggle_floating_mode(xcb_connection_t *conn, Client *client, bool automatic) {
  41         Container *con = client->container;
  42         i3Font *font = load_font(conn, config.font);
  43
  44         if (con == NULL) {
  45                 LOG("This client is already in floating (container == NULL), re-inserting\n");
  46                 Client *next_tiling;
  47                 Workspace *ws = client->workspace;
  48                 SLIST_FOREACH(next_tiling, &(ws->focus_stack), focus_clients)
  49                         if (!client_is_floating(next_tiling))
  50                                 break;
  51                 /* If there are no tiling clients on this workspace, there can only be one
  52                  * container: the first one */
  53                 if (next_tiling == TAILQ_END(&(ws->focus_stack)))
  54                         con = ws->table[0][0];
  55                 else con = next_tiling->container;
  56
  57                 /* Remove the client from the list of floating clients */
  58                 TAILQ_REMOVE(&(ws->floating_clients), client, floating_clients);
  59
  60                 LOG("destination container = %p\n", con);
  61                 Client *old_focused = con->currently_focused;
  62                 /* Preserve position/size */
  63                 memcpy(&(client->floating_rect), &(client->rect), sizeof(Rect));
  64
  65                 client->floating = FLOATING_USER_OFF;
  66                 client->container = con;
  67
  68                 if (old_focused != NULL && !old_focused->dock)
  69                         CIRCLEQ_INSERT_AFTER(&(con->clients), old_focused, client, clients);
  70                 else CIRCLEQ_INSERT_TAIL(&(con->clients), client, clients);
  71
  72                 LOG("Re-inserted the client into the matrix.\n");
  73                 con->currently_focused = client;
  74
  75                 client_set_below_floating(conn, client);
  76
  77                 render_container(conn, con);
  78                 xcb_flush(conn);
  79
  80                 return;
  81         }
  82
  83         LOG("Entering floating for client %08x\n", client->child);
  84
  85         /* Remove the client of its container */
  86         client_remove_from_container(conn, client, con, false);
  87         client->container = NULL;
  88
  89         /* Add the client to the list of floating clients for its workspace */
  90         TAILQ_INSERT_TAIL(&(client->workspace->floating_clients), client, floating_clients);
  91
  92         if (con->currently_focused == client) {
  93                 LOG("Need to re-adjust currently_focused\n");
  94                 /* Get the next client in the focus stack for this particular container */
  95                 con->currently_focused = get_last_focused_client(conn, con, NULL);
  96         }
  97
  98         if (automatic)
  99                 client->floating = FLOATING_AUTO_ON;
 100         else client->floating = FLOATING_USER_ON;
 101
 102         /* Initialize the floating position from the position in tiling mode, if this
 103          * client never was floating (x == -1) */
 104         if (client->floating_rect.x == -1) {
 105                 /* Copy over the position */
 106                 client->floating_rect.x = client->rect.x;
 107                 client->floating_rect.y = client->rect.y;
 108
 109                 /* Copy size the other direction */
 110                 client->child_rect.width = client->floating_rect.width;
 111                 client->child_rect.height = client->floating_rect.height;
 112
 113                 client->rect.width = client->child_rect.width + 2 + 2;
 114                 client->rect.height = client->child_rect.height + (font->height + 2 + 2) + 2;
 115
 116                 LOG("copying size from tiling (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 117                                 client->floating_rect.width, client->floating_rect.height);
 118         } else {
 119                 /* If the client was already in floating before we restore the old position / size */
 120                 LOG("using: (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 121                         client->floating_rect.width, client->floating_rect.height);
 122                 memcpy(&(client->rect), &(client->floating_rect), sizeof(Rect));
 123         }
 124
 125         /* Raise the client */
 126         xcb_raise_window(conn, client->frame);
 127         reposition_client(conn, client);
 128         resize_client(conn, client);
 129         /* redecorate_window flushes */
 130         redecorate_window(conn, client);
 131
 132         /* Re-render the tiling layout of this container */
 133         render_container(conn, con);
 134         xcb_flush(conn);
 135 }
 136
 137 /*
 138  * Removes the floating client from its workspace and attaches it to the new workspace.
 139  * This is centralized here because it may happen if you move it via keyboard and
 140  * if you move it using your mouse.
 141  *
 142  */
 143 void floating_assign_to_workspace(Client *client, Workspace *new_workspace) {
 144         Workspace *ws = client->workspace;
 145
 146         /* Remove from focus stack and list of floating clients */
 147         SLIST_REMOVE(&(ws->focus_stack), client, Client, focus_clients);
 148         TAILQ_REMOVE(&(ws->floating_clients), client, floating_clients);
 149
 150         if (ws->fullscreen_client == client)
 151                 ws->fullscreen_client = NULL;
 152
 153         /* Insert into destination focus stack and list of floating clients */
 154         ws = new_workspace;
 155         SLIST_INSERT_HEAD(&(ws->focus_stack), client, focus_clients);
 156         TAILQ_INSERT_TAIL(&(ws->floating_clients), client, floating_clients);
 157         if (client->fullscreen)
 158                 ws->fullscreen_client = client;
 159 }
 160
 161 /*
 162  * Called whenever the user clicks on a border (not the titlebar!) of a floating window.
 163  * Determines on which border the user clicked and launches the drag_pointer function
 164  * with the resize_callback.
 165  *
 166  */
 167 int floating_border_click(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 168
 169         LOG("floating border click\n");
 170
 171         border_t border;
 172
 173         void resize_callback(Rect *old_rect, uint32_t new_x, uint32_t new_y) {
 174                 switch (border) {
 175                         case BORDER_RIGHT: {
 176                                 int new_width = old_rect->width + (new_x - event->root_x);
 177                                 if ((new_width < 0) ||
 178                                     (new_width < 50 && client->rect.width >= new_width))
 179                                         return;
 180                                 client->rect.width = new_width;
 181                                 break;
 182                         }
 183
 184                         case BORDER_BOTTOM: {
 185                                 int new_height = old_rect->height + (new_y - event->root_y);
 186                                 if ((new_height < 0) ||
 187                                     (new_height < 20 && client->rect.height >= new_height))
 188                                         return;
 189                                 client->rect.height = old_rect->height + (new_y - event->root_y);
 190                                 break;
 191                         }
 192
 193                         case BORDER_TOP: {
 194                                 int new_height = old_rect->height + (event->root_y - new_y);
 195                                 if ((new_height < 0) ||
 196                                     (new_height < 20 && client->rect.height >= new_height))
 197                                         return;
 198
 199                                 client->rect.y = old_rect->y + (new_y - event->root_y);
 200                                 client->rect.height = new_height;
 201                                 break;
 202                         }
 203
 204                         case BORDER_LEFT: {
 205                                 int new_width = old_rect->width + (event->root_x - new_x);
 206                                 if ((new_width < 0) ||
 207                                     (new_width < 50 && client->rect.width >= new_width))
 208                                         return;
 209                                 client->rect.x = old_rect->x + (new_x - event->root_x);
 210                                 client->rect.width = new_width;
 211                                 break;
 212                         }
 213                 }
 214
 215                 /* Push the new position/size to X11 */
 216                 reposition_client(conn, client);
 217                 resize_client(conn, client);
 218                 xcb_flush(conn);
 219         }
 220
 221         if (event->event_y < 2)
 222                 border = BORDER_TOP;
 223         else if (event->event_y >= (client->rect.height - 2))
 224                 border = BORDER_BOTTOM;
 225         else if (event->event_x <= 2)
 226                 border = BORDER_LEFT;
 227         else if (event->event_x >= (client->rect.width - 2))
 228                 border = BORDER_RIGHT;
 229         else {
 230                 LOG("Not on any border, not doing anything.\n");
 231                 return 1;
 232         }
 233
 234         LOG("border = %d\n", border);
 235
 236         drag_pointer(conn, client, event, XCB_NONE, border, resize_callback);
 237
 238         return 1;
 239 }
 240
 241
 242 /*
 243  * Called when the user clicked on the titlebar of a floating window.
 244  * Calls the drag_pointer function with the drag_window callback
 245  *
 246  */
 247 void floating_drag_window(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 248         LOG("floating_drag_window\n");
 249
 250         void drag_window_callback(Rect *old_rect, uint32_t new_x, uint32_t new_y) {
 251                 /* Reposition the client correctly while moving */
 252                 client->rect.x = old_rect->x + (new_x - event->root_x);
 253                 client->rect.y = old_rect->y + (new_y - event->root_y);
 254                 reposition_client(conn, client);
 255                 /* Because reposition_client does not send a faked configure event (only resize does),
 256                  * we need to initiate that on our own */
 257                 fake_absolute_configure_notify(conn, client);
 258                 /* fake_absolute_configure_notify flushes */
 259         }
 260
 261         drag_pointer(conn, client, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback);
 262 }
 263
 264 /*
 265  * Called when the user right-clicked on the titlebar of a floating window to
 266  * resize it.
 267  * Calls the drag_pointer function with the resize_window callback
 268  *
 269  */
 270 void floating_resize_window(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 271         LOG("floating_resize_window\n");
 272
 273         void resize_window_callback(Rect *old_rect, uint32_t new_x, uint32_t new_y) {
 274                 int32_t new_width = old_rect->width + (new_x - event->root_x);
 275                 int32_t new_height = old_rect->height + (new_y - event->root_y);
 276                 /* Obey minimum window size */
 277                 if (new_width < 75 || new_height < 50)
 278                         return;
 279
 280                 /* Reposition the client correctly while moving */
 281                 client->rect.width = new_width;
 282                 client->rect.height = new_height;
 283
 284                 /* resize_client flushes */
 285                 resize_client(conn, client);
 286         }
 287
 288         drag_pointer(conn, client, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback);
 289 }
 290
 291
 292 /*
 293  * This function grabs your pointer and lets you drag stuff around (borders).
 294  * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
 295  * and the given callback will be called with the parameters specified (client,
 296  * border on which the click originally was), the original rect of the client,
 297  * the event and the new coordinates (x, y).
 298  *
 299  */
 300 void drag_pointer(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event,
 301                   xcb_window_t confine_to, border_t border, callback_t callback) {
 302         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 303         uint32_t new_x, new_y;
 304         Rect old_rect;
 305         if (client != NULL)
 306                 memcpy(&old_rect, &(client->rect), sizeof(Rect));
 307
 308         /* Grab the pointer */
 309         /* TODO: returncode */
 310         xcb_grab_pointer(conn,
 311                         false,               /* get all pointer events specified by the following mask */
 312                         root,                /* grab the root window */
 313                         XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
 314                         XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
 315                         XCB_GRAB_MODE_ASYNC, /* keyboard mode */
 316                         confine_to,          /* confine_to = in which window should the cursor stay */
 317                         XCB_NONE,            /* don’t display a special cursor */
 318                         XCB_CURRENT_TIME);
 319
 320         /* Go into our own event loop */
 321         xcb_flush(conn);
 322
 323         xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
 324         /* I’ve always wanted to have my own eventhandler… */
 325         while ((inside_event = xcb_wait_for_event(conn))) {
 326                 /* We now handle all events we can get using xcb_poll_for_event */
 327                 do {
 328                         /* Same as get_event_handler in xcb */
 329                         int nr = inside_event->response_type;
 330                         if (nr == 0) {
 331                                 /* An error occured */
 332                                 handle_event(NULL, conn, inside_event);
 333                                 free(inside_event);
 334                                 continue;
 335                         }
 336                         assert(nr < 256);
 337                         nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 338                         assert(nr >= 2);
 339
 340                         switch (nr) {
 341                                 case XCB_BUTTON_RELEASE:
 342                                         goto done;
 343
 344                                 case XCB_MOTION_NOTIFY:
 345                                         /* motion_notify events are saved for later */
 346                                         FREE(last_motion_notify);
 347                                         last_motion_notify = inside_event;
 348                                         break;
 349
 350                                 case XCB_UNMAP_NOTIFY:
 351                                         LOG("Unmap-notify, aborting\n");
 352                                         xcb_event_handle(&evenths, inside_event);
 353                                         goto done;
 354
 355                                 default:
 356                                         LOG("Passing to original handler\n");
 357                                         /* Use original handler */
 358                                         xcb_event_handle(&evenths, inside_event);
 359                                         break;
 360                         }
 361                         if (last_motion_notify != inside_event)
 362                                 free(inside_event);
 363                 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
 364
 365                 if (last_motion_notify == NULL)
 366                         continue;
 367
 368                 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
 369                 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
 370
 371                 callback(&old_rect, new_x, new_y);
 372                 FREE(last_motion_notify);
 373         }
 374 done:
 375         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 376         xcb_flush(conn);
 377 }
 378
 379 /*
 380  * Changes focus in the given direction for floating clients.
 381  *
 382  * Changing to the left/right means going to the previous/next floating client,
 383  * changing to top/bottom means cycling through the Z-index.
 384  *
 385  */
 386 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 387         LOG("floating focus\n");
 388
 389         if (direction == D_LEFT || direction == D_RIGHT) {
 390                 /* Go to the next/previous floating client */
 391                 Client *client;
 392
 393                 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
 394                                                         TAILQ_NEXT(currently_focused, floating_clients))) !=
 395                        TAILQ_END(&(currently_focused->workspace->floating_clients))) {
 396                         if (!client->floating)
 397                                 continue;
 398                         set_focus(conn, client, true);
 399                         return;
 400                 }
 401         }
 402 }
 403
 404 /*
 405  * Moves the client 10px to the specified direction.
 406  *
 407  */
 408 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 409         LOG("floating move\n");
 410
 411         switch (direction) {
 412                 case D_LEFT:
 413                         if (currently_focused->rect.x < 10)
 414                                 return;
 415                         currently_focused->rect.x -= 10;
 416                         break;
 417                 case D_RIGHT:
 418                         currently_focused->rect.x += 10;
 419                         break;
 420                 case D_UP:
 421                         if (currently_focused->rect.y < 10)
 422                                 return;
 423                         currently_focused->rect.y -= 10;
 424                         break;
 425                 case D_DOWN:
 426                         currently_focused->rect.y += 10;
 427                         break;
 428                 /* to make static analyzers happy */
 429                 default:
 430                         break;
 431         }
 432
 433         reposition_client(conn, currently_focused);
 434
 435         /* Because reposition_client does not send a faked configure event (only resize does),
 436          * we need to initiate that on our own */
 437         fake_absolute_configure_notify(conn, currently_focused);
 438         /* fake_absolute_configure_notify flushes */
 439 }
 440
 441 /*
 442  * Hides all floating clients (or show them if they are currently hidden) on
 443  * the specified workspace.
 444  *
 445  */
 446 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
 447         Client *client;
 448
 449         workspace->floating_hidden = !workspace->floating_hidden;
 450         LOG("floating_hidden is now: %d\n", workspace->floating_hidden);
 451         TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
 452                 if (workspace->floating_hidden)
 453                         client_unmap(conn, client);
 454                 else client_map(conn, client);
 455         }
 456
 457         /* If we just unmapped all floating windows we should ensure that the focus
 458          * is set correctly, that ist, to the first non-floating client in stack */
 459         if (workspace->floating_hidden)
 460                 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
 461                         if (client_is_floating(client))
 462                                 continue;
 463                         set_focus(conn, client, true);
 464                         return;
 465                 }
 466
 467         xcb_flush(conn);
 468 }