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 "data.h"
  22 #include "util.h"
  23 #include "xcb.h"
  24 #include "debug.h"
  25 #include "layout.h"
  26 #include "client.h"
  27
  28 /* On which border was the dragging initiated? */
  29 typedef enum { BORDER_LEFT, BORDER_RIGHT, BORDER_TOP, BORDER_BOTTOM} border_t;
  30 /* Callback for dragging */
  31 typedef void(*callback_t)(xcb_connection_t*, Client*, border_t, Rect*, xcb_button_press_event_t*, uint32_t, uint32_t);
  32
  33 /* Forward definitions */
  34 static void drag_pointer(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event,
  35                          border_t border, callback_t callback);
  36
  37 /*
  38  * Toggles floating mode for the given client.
  39  * Correctly takes care of the position/size (separately stored for tiling/floating mode)
  40  * and repositions/resizes/redecorates the client.
  41  *
  42  * If the automatic flag is set to true, this was an automatic update by a change of the
  43  * window class from the application which can be overwritten by the user.
  44  *
  45  */
  46 void toggle_floating_mode(xcb_connection_t *conn, Client *client, bool automatic) {
  47         Container *con = client->container;
  48
  49         if (con == NULL) {
  50                 LOG("This client is already in floating (container == NULL), re-inserting\n");
  51                 Client *next_tiling;
  52                 SLIST_FOREACH(next_tiling, &(client->workspace->focus_stack), focus_clients)
  53                         if (next_tiling->floating <= FLOATING_USER_OFF)
  54                                 break;
  55                 /* If there are no tiling clients on this workspace, there can only be one
  56                  * container: the first one */
  57                 if (next_tiling == SLIST_END(&(client->workspace->focus_stack)))
  58                         con = client->workspace->table[0][0];
  59                 else con = next_tiling->container;
  60
  61                 LOG("destination container = %p\n", con);
  62                 Client *old_focused = con->currently_focused;
  63                 /* Preserve position/size */
  64                 memcpy(&(client->floating_rect), &(client->rect), sizeof(Rect));
  65
  66                 client->floating = FLOATING_USER_OFF;
  67                 client->container = con;
  68
  69                 if (old_focused != NULL && !old_focused->dock)
  70                         CIRCLEQ_INSERT_AFTER(&(con->clients), old_focused, client, clients);
  71                 else CIRCLEQ_INSERT_TAIL(&(con->clients), client, clients);
  72
  73                 LOG("Re-inserted the client into the matrix.\n");
  74                 con->currently_focused = client;
  75
  76                 render_container(conn, con);
  77                 xcb_flush(conn);
  78
  79                 return;
  80         }
  81
  82         LOG("Entering floating for client %08x\n", client->child);
  83
  84         /* Remove the client of its container */
  85         client_remove_from_container(conn, client, con, false);
  86         client->container = NULL;
  87
  88         if (con->currently_focused == client) {
  89                 LOG("Need to re-adjust currently_focused\n");
  90                 /* Get the next client in the focus stack for this particular container */
  91                 con->currently_focused = get_last_focused_client(conn, con, NULL);
  92         }
  93
  94         if (automatic)
  95                 client->floating = FLOATING_AUTO_ON;
  96         else client->floating = FLOATING_USER_ON;
  97
  98         /* Initialize the floating position from the position in tiling mode, if this
  99          * client never was floating (width == 0) */
 100         if (client->floating_rect.width == 0) {
 101                 memcpy(&(client->floating_rect), &(client->rect), sizeof(Rect));
 102                 LOG("(%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 103                                 client->floating_rect.width, client->floating_rect.height);
 104         } else {
 105                 /* If the client was already in floating before we restore the old position / size */
 106                 memcpy(&(client->rect), &(client->floating_rect), sizeof(Rect));
 107         }
 108
 109         /* Raise the client */
 110         xcb_raise_window(conn, client->frame);
 111         reposition_client(conn, client);
 112         resize_client(conn, client);
 113         /* redecorate_window flushes */
 114         redecorate_window(conn, client);
 115
 116         /* Re-render the tiling layout of this container */
 117         render_container(conn, con);
 118         xcb_flush(conn);
 119 }
 120
 121 /*
 122  * Callback for resizing windows
 123  *
 124  */
 125 static void resize_callback(xcb_connection_t *conn, Client *client, border_t border, Rect *old_rect,
 126                             xcb_button_press_event_t *event, uint32_t new_x, uint32_t new_y) {
 127         switch (border) {
 128                 case BORDER_RIGHT:
 129                         client->rect.width = old_rect->width + (new_x - event->root_x);
 130                         break;
 131
 132                 case BORDER_BOTTOM:
 133                         client->rect.height = old_rect->height + (new_y - event->root_y);
 134                         break;
 135
 136                 case BORDER_TOP:
 137                         client->rect.y = old_rect->y + (new_y - event->root_y);
 138                         client->rect.height = old_rect->height + (event->root_y - new_y);
 139                         break;
 140
 141                 case BORDER_LEFT:
 142                         client->rect.x = old_rect->x + (new_x - event->root_x);
 143                         client->rect.width = old_rect->width + (event->root_x - new_x);
 144                         break;
 145         }
 146
 147         /* Push the new position/size to X11 */
 148         reposition_client(conn, client);
 149         resize_client(conn, client);
 150         xcb_flush(conn);
 151 }
 152
 153 /*
 154  * Called whenever the user clicks on a border (not the titlebar!) of a floating window.
 155  * Determines on which border the user clicked and launches the drag_pointer function
 156  * with the resize_callback.
 157  *
 158  */
 159 int floating_border_click(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 160
 161         LOG("floating border click\n");
 162
 163         border_t border;
 164         if (event->event_y < 2)
 165                 border = BORDER_TOP;
 166         else if (event->event_y >= (client->rect.height - 2))
 167                 border = BORDER_BOTTOM;
 168         else if (event->event_x <= 2)
 169                 border = BORDER_LEFT;
 170         else if (event->event_x > 2)
 171                 border = BORDER_RIGHT;
 172         else {
 173                 LOG("Not on any border, not doing anything.\n");
 174                 return 1;
 175         }
 176
 177         LOG("border = %d\n", border);
 178
 179         drag_pointer(conn, client, event, border, resize_callback);
 180
 181         return 1;
 182 }
 183
 184 static void drag_window_callback(xcb_connection_t *conn, Client *client, border_t border, Rect *old_rect,
 185                             xcb_button_press_event_t *event, uint32_t new_x, uint32_t new_y) {
 186         /* Reposition the client correctly while moving */
 187         client->rect.x = old_rect->x + (new_x - event->root_x);
 188         client->rect.y = old_rect->y + (new_y - event->root_y);
 189         reposition_client(conn, client);
 190         /* Because reposition_client does not send a faked configure event (only resize does),
 191          * we need to initiate that on our own */
 192         fake_absolute_configure_notify(conn, client);
 193         /* fake_absolute_configure_notify flushes */
 194 }
 195
 196 /*
 197  * Called when the user clicked on the titlebar of a floating window.
 198  * Calls the drag_pointer function with the drag_window callback
 199  *
 200  */
 201 void floating_drag_window(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 202         LOG("floating_drag_window\n");
 203
 204         drag_pointer(conn, client, event, BORDER_TOP /* irrelevant */, drag_window_callback);
 205 }
 206
 207 /*
 208  * This function grabs your pointer and lets you drag stuff around (borders).
 209  * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
 210  * and the given callback will be called with the parameters specified (client,
 211  * border on which the click originally was), the original rect of the client,
 212  * the event and the new coordinates (x, y).
 213  *
 214  */
 215 static void drag_pointer(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event,
 216                          border_t border, callback_t callback) {
 217         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 218         uint32_t new_x, new_y;
 219         Rect old_rect;
 220         memcpy(&old_rect, &(client->rect), sizeof(Rect));
 221
 222         /* Grab the pointer */
 223         /* TODO: returncode */
 224         xcb_grab_pointer(conn,
 225                         false,               /* get all pointer events specified by the following mask */
 226                         root,                /* grab the root window */
 227                         XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
 228                         XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
 229                         XCB_GRAB_MODE_ASYNC, /* keyboard mode */
 230                         XCB_NONE,            /* confine_to = in which window should the cursor stay */
 231                         XCB_NONE,            /* don’t display a special cursor */
 232                         XCB_CURRENT_TIME);
 233
 234         /* Go into our own event loop */
 235         xcb_flush(conn);
 236
 237         xcb_generic_event_t *inside_event;
 238         /* I’ve always wanted to have my own eventhandler… */
 239         while ((inside_event = xcb_wait_for_event(conn))) {
 240                 /* Same as get_event_handler in xcb */
 241                 int nr = inside_event->response_type;
 242                 if (nr == 0) {
 243                         /* An error occured */
 244                         handle_event(NULL, conn, inside_event);
 245                         free(inside_event);
 246                         continue;
 247                 }
 248                 assert(nr < 256);
 249                 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 250                 assert(nr >= 2);
 251
 252                 /* Check if we need to escape this loop */
 253                 if (nr == XCB_BUTTON_RELEASE)
 254                         break;
 255
 256                 switch (nr) {
 257                         case XCB_MOTION_NOTIFY:
 258                                 new_x = ((xcb_motion_notify_event_t*)inside_event)->root_x;
 259                                 new_y = ((xcb_motion_notify_event_t*)inside_event)->root_y;
 260
 261                                 callback(conn, client, border, &old_rect, event, new_x, new_y);
 262
 263                                 break;
 264                         default:
 265                                 LOG("Passing to original handler\n");
 266                                 /* Use original handler */
 267                                 xcb_event_handle(&evenths, inside_event);
 268                                 break;
 269                 }
 270                 free(inside_event);
 271         }
 272
 273         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 274         xcb_flush(conn);
 275 }
 276