git.sur5r.net Git - i3/i3/blob - src/handlers.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  */
  11 #include <stdio.h>
  12 #include <assert.h>
  13 #include <string.h>
  14 #include <stdlib.h>
  15 #include <xcb/xcb.h>
  16
  17 #include <xcb/xcb_wm.h>
  18 #include <X11/XKBlib.h>
  19
  20 #include "i3.h"
  21 #include "debug.h"
  22 #include "table.h"
  23 #include "layout.h"
  24 #include "commands.h"
  25 #include "data.h"
  26 #include "font.h"
  27 #include "xcb.h"
  28 #include "util.h"
  29 #include "xinerama.h"
  30
  31 /*
  32  * Due to bindings like Mode_switch + <a>, we need to bind some keys in XCB_GRAB_MODE_SYNC.
  33  * Therefore, we just replay all key presses.
  34  *
  35  */
  36 int handle_key_release(void *ignored, xcb_connection_t *conn, xcb_key_release_event_t *event) {
  37         printf("got key release, just passing\n");
  38         xcb_allow_events(conn, XCB_ALLOW_REPLAY_KEYBOARD, event->time);
  39         xcb_flush(conn);
  40         return 1;
  41 }
  42
  43 /*
  44  * There was a key press. We compare this key code with our bindings table and pass
  45  * the bound action to parse_command().
  46  *
  47  */
  48 int handle_key_press(void *ignored, xcb_connection_t *conn, xcb_key_press_event_t *event) {
  49         printf("Keypress %d\n", event->detail);
  50
  51         /* We need to get the keysym group (There are group 1 to group 4, each holding
  52            two keysyms (without shift and with shift) using Xkb because X fails to
  53            provide them reliably (it works in Xephyr, it does not in real X) */
  54         XkbStateRec state;
  55         if (XkbGetState(xkbdpy, XkbUseCoreKbd, &state) == Success && (state.group+1) == 2)
  56                 event->state |= 0x2;
  57
  58         printf("state %d\n", event->state);
  59
  60         /* Remove the numlock bit, all other bits are modifiers we can bind to */
  61         uint16_t state_filtered = event->state & ~XCB_MOD_MASK_LOCK;
  62
  63         /* Find the binding */
  64         Binding *bind;
  65         TAILQ_FOREACH(bind, &bindings, bindings)
  66                 if (bind->keycode == event->detail && bind->mods == state_filtered)
  67                         break;
  68
  69         /* No match? Then it was an actively grabbed key, that is with Mode_switch, and
  70            the user did not press Mode_switch, so just pass it… */
  71         if (bind == TAILQ_END(&bindings)) {
  72                 xcb_allow_events(conn, ReplayKeyboard, event->time);
  73                 xcb_flush(conn);
  74                 return 1;
  75         }
  76
  77         parse_command(conn, bind->command);
  78         if (event->state & 0x2) {
  79                 printf("Mode_switch -> allow_events(SyncKeyboard)\n");
  80                 xcb_allow_events(conn, SyncKeyboard, event->time);
  81                 xcb_flush(conn);
  82         }
  83         return 1;
  84 }
  85
  86
  87 /*
  88  * When the user moves the mouse pointer onto a window, this callback gets called.
  89  *
  90  */
  91 int handle_enter_notify(void *ignored, xcb_connection_t *conn, xcb_enter_notify_event_t *event) {
  92         printf("enter_notify\n");
  93
  94         /* This was either a focus for a client’s parent (= titlebar)… */
  95         Client *client = table_get(byParent, event->event);
  96         /* …or the client itself */
  97         if (client == NULL)
  98                 client = table_get(byChild, event->event);
  99
 100         /* If not, then the user moved his cursor to the root window. In that case, we adjust c_ws */
 101         if (client == NULL) {
 102                 printf("Getting screen at %d x %d\n", event->root_x, event->root_y);
 103                 i3Screen *screen = get_screen_containing(event->root_x, event->root_y);
 104                 if (screen == NULL) {
 105                         printf("ERROR: No such screen\n");
 106                         return 0;
 107                 }
 108                 c_ws = &workspaces[screen->current_workspace];
 109                 printf("We're now on virtual screen number %d\n", screen->num);
 110                 return 1;
 111         }
 112
 113         set_focus(conn, client);
 114
 115         return 1;
 116 }
 117
 118 int handle_button_press(void *ignored, xcb_connection_t *conn, xcb_button_press_event_t *event) {
 119         printf("button press!\n");
 120         /* This was either a focus for a client’s parent (= titlebar)… */
 121         Client *client = table_get(byChild, event->event);
 122         bool border_click = false;
 123         if (client == NULL) {
 124                 client = table_get(byParent, event->event);
 125                 border_click = true;
 126         }
 127         if (client == NULL)
 128                 return 1;
 129
 130         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 131         xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
 132
 133         /* Set focus in any case */
 134         set_focus(conn, client);
 135
 136         /* Let’s see if this was on the borders (= resize). If not, we’re done */
 137         printf("press button on x=%d, y=%d\n", event->event_x, event->event_y);
 138
 139         Container *con = client->container,
 140                   *first = NULL,
 141                   *second = NULL;
 142         enum { O_HORIZONTAL, O_VERTICAL } orientation = O_VERTICAL;
 143
 144         if (con == NULL) {
 145                 printf("dock. done.\n");
 146                 return 1;
 147         }
 148
 149         printf("event->event_x = %d, client->rect.width = %d\n", event->event_x, client->rect.width);
 150
 151         if (!border_click) {
 152                 printf("client. done.\n");
 153                 return 1;
 154         }
 155
 156         if (event->event_y < 2) {
 157                 /* This was a press on the top border */
 158                 if (con->row == 0)
 159                         return 1;
 160                 first = con->workspace->table[con->col][con->row-1];
 161                 second = con;
 162                 orientation = O_HORIZONTAL;
 163         } else if (event->event_y >= (client->rect.height - 2)) {
 164                 /* …bottom border */
 165                 if (con->row == (con->workspace->rows-1))
 166                         return 1;
 167                 first = con;
 168                 second = con->workspace->table[con->col][con->row+1];
 169                 orientation = O_HORIZONTAL;
 170         } else if (event->event_x < 2) {
 171                 /* …left border */
 172                 if (con->col == 0)
 173                         return 1;
 174                 first = con->workspace->table[con->col-1][con->row];
 175                 second = con;
 176         } else if (event->event_x > 2) {
 177                 /* …right border */
 178                 if (con->col == (con->workspace->cols-1))
 179                         return 1;
 180                 first = con;
 181                 second = con->workspace->table[con->col+1][con->row];
 182         }
 183
 184         /* Open a new window, the resizebar. Grab the pointer and move the window around
 185            as the user moves the pointer. */
 186         Rect grabrect = {0, 0, root_screen->width_in_pixels, root_screen->height_in_pixels};
 187         xcb_window_t grabwin = create_window(conn, grabrect, XCB_WINDOW_CLASS_INPUT_ONLY, 0, NULL);
 188
 189         Rect helprect;
 190         if (orientation == O_VERTICAL) {
 191                 helprect.x = event->root_x;
 192                 helprect.y = 0;
 193                 helprect.width = 2;
 194                 helprect.height = root_screen->height_in_pixels; /* this has to be the cell’s height */
 195         } else {
 196                 helprect.x = 0;
 197                 helprect.y = event->root_y;
 198                 helprect.width = root_screen->width_in_pixels; /* this has to be the cell’s width*/
 199                 helprect.height = 2;
 200         }
 201         xcb_window_t helpwin = create_window(conn, helprect, XCB_WINDOW_CLASS_INPUT_OUTPUT, 0, NULL);
 202
 203         uint32_t values[1] = {get_colorpixel(conn, helpwin, "#4c7899")};
 204         xcb_void_cookie_t cookie = xcb_change_window_attributes_checked(conn, helpwin, XCB_CW_BACK_PIXEL, values);
 205         check_error(conn, cookie, "Could not change window attributes (background color)");
 206
 207         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
 208
 209         xcb_grab_pointer(conn, false, root, XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION,
 210                         XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC, grabwin, XCB_NONE, XCB_CURRENT_TIME);
 211
 212         xcb_flush(conn);
 213
 214         xcb_generic_event_t *inside_event;
 215         /* I’ve always wanted to have my own eventhandler… */
 216         while ((inside_event = xcb_wait_for_event(conn))) {
 217                 /* Same as get_event_handler in xcb */
 218                 int nr = inside_event->response_type;
 219                 if (nr == 0) {
 220                         /* An error occured */
 221                         handle_event(NULL, conn, inside_event);
 222                         free(inside_event);
 223                         continue;
 224                 }
 225                 assert(nr < 256);
 226                 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 227                 assert(nr >= 2);
 228
 229                 /* Check if we need to escape this loop… */
 230                 if (nr == XCB_BUTTON_RELEASE)
 231                         break;
 232
 233                 switch (nr) {
 234                         case XCB_MOTION_NOTIFY:
 235                                 if (orientation == O_VERTICAL) {
 236                                         values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_x;
 237                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
 238                                 } else {
 239                                         values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_y;
 240                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_Y, values);
 241                                 }
 242
 243                                 xcb_flush(conn);
 244                                 break;
 245                         case XCB_EXPOSE:
 246                                 /* Use original handler */
 247                                 xcb_event_handle(&evenths, inside_event);
 248                                 break;
 249                         default:
 250                                 printf("Ignoring event of type %d\n", nr);
 251                                 break;
 252                 }
 253                 free(inside_event);
 254         }
 255
 256         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 257         xcb_destroy_window(conn, helpwin);
 258         xcb_destroy_window(conn, grabwin);
 259         xcb_flush(conn);
 260
 261         Workspace *ws = con->workspace;
 262         if (orientation == O_VERTICAL) {
 263                 printf("Resize was from X = %d to X = %d\n", event->root_x, values[0]);
 264
 265                 /* Convert 0 (for default width_factor) to actual numbers */
 266                 if (first->width_factor == 0)
 267                         first->width_factor = ((float)ws->rect.width / ws->cols) / ws->rect.width;
 268                 if (second->width_factor == 0)
 269                         second->width_factor = ((float)ws->rect.width / ws->cols) / ws->rect.width;
 270
 271                 first->width_factor *= (float)(first->width + (values[0] - event->root_x)) / first->width;
 272                 second->width_factor *= (float)(second->width - (values[0] - event->root_x)) / second->width;
 273         } else {
 274                 printf("Resize was from Y = %d to Y = %d\n", event->root_y, values[0]);
 275
 276                 /* Convert 0 (for default height_factor) to actual numbers */
 277                 if (first->height_factor == 0)
 278                         first->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 279                 if (second->height_factor == 0)
 280                         second->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 281
 282                 first->height_factor *= (float)(first->height + (values[0] - event->root_y)) / first->height;
 283                 second->height_factor *= (float)(second->height - (values[0] - event->root_y)) / second->height;
 284         }
 285
 286         render_layout(conn);
 287
 288         return 1;
 289 }
 290
 291 int handle_map_notify_event(void *prophs, xcb_connection_t *conn, xcb_map_notify_event_t *event) {
 292         window_attributes_t wa = { TAG_VALUE };
 293         wa.u.override_redirect = event->override_redirect;
 294         printf("MapNotify for 0x%08x.\n", event->window);
 295         manage_window(prophs, conn, event->window, wa);
 296         return 1;
 297 }
 298
 299 /*
 300  * Our window decorations were unmapped. That means, the window will be killed now,
 301  * so we better clean up before.
 302  *
 303  */
 304 int handle_unmap_notify_event(void *data, xcb_connection_t *c, xcb_unmap_notify_event_t *e) {
 305         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(c)).data->root;
 306
 307         Client *client = table_get(byChild, e->window);
 308         /* First, we need to check if the client is awaiting an unmap-request which
 309            was generated by us reparenting the window. In that case, we just ignore it. */
 310         if (client != NULL && client->awaiting_useless_unmap) {
 311                 printf("Dropping this unmap request, it was generated by reparenting\n");
 312                 client->awaiting_useless_unmap = false;
 313                 return 1;
 314         }
 315         client = table_remove(byChild, e->window);
 316
 317         printf("UnmapNotify for 0x%08x (received from 0x%08x): ", e->window, e->event);
 318         if (client == NULL) {
 319                 printf("not a managed window. Ignoring.\n");
 320                 return 0;
 321         }
 322
 323         if (client->container != NULL) {
 324                 if (client->container->currently_focused == client)
 325                         client->container->currently_focused = NULL;
 326                 CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
 327         }
 328
 329         printf("child of 0x%08x.\n", client->frame);
 330         xcb_reparent_window(c, client->child, root, 0, 0);
 331         xcb_destroy_window(c, client->frame);
 332         xcb_flush(c);
 333         table_remove(byParent, client->frame);
 334         free(client);
 335
 336         render_layout(c);
 337
 338         return 1;
 339 }
 340
 341 /*
 342  * Called when a window changes its title
 343  *
 344  */
 345 int handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
 346                                 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
 347         printf("window's name changed.\n");
 348         Client *client = table_get(byChild, window);
 349         if (client == NULL)
 350                 return 1;
 351
 352         client->name_len = xcb_get_property_value_length(prop);
 353         client->name = malloc(client->name_len);
 354         strncpy(client->name, xcb_get_property_value(prop), client->name_len);
 355         printf("rename to \"%.*s\".\n", client->name_len, client->name);
 356
 357         decorate_window(conn, client);
 358         xcb_flush(conn);
 359
 360         return 1;
 361 }
 362
 363 /*
 364  * Expose event means we should redraw our windows (= title bar)
 365  *
 366  */
 367 int handle_expose_event(void *data, xcb_connection_t *conn, xcb_expose_event_t *e) {
 368         Client *client = table_get(byParent, e->window);
 369         if(!client || e->count != 0)
 370                 return 1;
 371         printf("handle_expose_event()\n");
 372         decorate_window(conn, client);
 373         return 1;
 374 }
 375
 376 /*
 377  * Handle client messages (EWMH)
 378  *
 379  */
 380 int handle_client_message(void *data, xcb_connection_t *conn, xcb_client_message_event_t *event) {
 381         printf("client_message\n");
 382
 383         if (event->type == atoms[_NET_WM_STATE]) {
 384                 if (event->format != 32 || event->data.data32[1] != atoms[_NET_WM_STATE_FULLSCREEN])
 385                         return 0;
 386
 387                 printf("fullscreen\n");
 388
 389                 Client *client = table_get(byChild, event->window);
 390                 if (client == NULL)
 391                         return 0;
 392
 393                 /* Check if the fullscreen state should be toggled… */
 394                 if ((client->fullscreen &&
 395                      (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
 396                       event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
 397                     (!client->fullscreen &&
 398                      (event->data.data32[0] == _NET_WM_STATE_ADD ||
 399                       event->data.data32[0] == _NET_WM_STATE_TOGGLE)))
 400                         toggle_fullscreen(conn, client);
 401         } else {
 402                 printf("unhandled clientmessage\n");
 403                 return 0;
 404         }
 405
 406         return 1;
 407 }
 408
 409 int window_type_handler(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
 410                         xcb_atom_t atom, xcb_get_property_reply_t *property) {
 411         /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
 412          before changing this property. */
 413         printf("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
 414         return 0;
 415 }