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