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