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