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  * (c) 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 lookup the key symbol and see if there are any bindings
  45  * on that. This allows to do things like binding special characters (think of ä) to
  46  * functions to get one more modifier while not losing AltGr :-)
  47  * TODO: this description needs to be more understandable
  48  *
  49  */
  50 int handle_key_press(void *ignored, xcb_connection_t *conn, xcb_key_press_event_t *event) {
  51         printf("Keypress %d\n", event->detail);
  52
  53         /* We need to get the keysym group (There are group 1 to group 4, each holding
  54            two keysyms (without shift and with shift) using Xkb because X fails to
  55            provide them reliably (it works in Xephyr, it does not in real X) */
  56         XkbStateRec state;
  57         if (XkbGetState(xkbdpy, XkbUseCoreKbd, &state) == Success && (state.group+1) == 2)
  58                 event->state |= 0x2;
  59
  60         printf("state %d\n", event->state);
  61
  62         /* Find the binding */
  63         /* TODO: event->state durch eine bitmask filtern und dann direkt vergleichen */
  64         Binding *bind, *best_match = TAILQ_END(&bindings);
  65         TAILQ_FOREACH(bind, &bindings, bindings) {
  66                 if (bind->keycode == event->detail &&
  67                         (bind->mods & event->state) == bind->mods) {
  68                         if (best_match == TAILQ_END(&bindings) ||
  69                                 bind->mods > best_match->mods)
  70                                 best_match = bind;
  71                 }
  72         }
  73
  74         /* No match? Then it was an actively grabbed key, that is with Mode_switch, and
  75            the user did not press Mode_switch, so just pass it… */
  76         if (best_match == TAILQ_END(&bindings)) {
  77                 xcb_allow_events(conn, ReplayKeyboard, event->time);
  78                 xcb_flush(conn);
  79                 return 1;
  80         }
  81
  82         if (event->state & 0x2) {
  83                 printf("that's mode_switch\n");
  84                 parse_command(conn, best_match->command);
  85                 printf("ok, hiding this event.\n");
  86                 xcb_allow_events(conn, SyncKeyboard, event->time);
  87                 xcb_flush(conn);
  88                 return 1;
  89         }
  90
  91         parse_command(conn, best_match->command);
  92         return 1;
  93 }
  94
  95
  96 /*
  97  * When the user moves the mouse pointer onto a window, this callback gets called.
  98  *
  99  */
 100 int handle_enter_notify(void *ignored, xcb_connection_t *conn, xcb_enter_notify_event_t *event) {
 101         printf("enter_notify\n");
 102
 103         /* This was either a focus for a client’s parent (= titlebar)… */
 104         Client *client = table_get(byParent, event->event);
 105         /* …or the client itself */
 106         if (client == NULL)
 107                 client = table_get(byChild, event->event);
 108
 109         /* If not, then the user moved his cursor to the root window. In that case, we adjust c_ws */
 110         if (client == NULL) {
 111                 printf("Getting screen at %d x %d\n", event->root_x, event->root_y);
 112                 i3Screen *screen = get_screen_containing(event->root_x, event->root_y);
 113                 if (screen == NULL) {
 114                         printf("ERROR: No such screen\n");
 115                         return 0;
 116                 }
 117                 c_ws = &workspaces[screen->current_workspace];
 118                 printf("We're now on virtual screen number %d\n", screen->num);
 119                 return 1;
 120         }
 121
 122         set_focus(conn, client);
 123
 124         return 1;
 125 }
 126
 127 int handle_button_press(void *ignored, xcb_connection_t *conn, xcb_button_press_event_t *event) {
 128         printf("button press!\n");
 129         /* This was either a focus for a client’s parent (= titlebar)… */
 130         Client *client = table_get(byChild, event->event);
 131         if (client == NULL)
 132                 client = table_get(byParent, event->event);
 133         if (client == NULL)
 134                 return 1;
 135
 136         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 137         xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
 138
 139         /* Set focus in any case */
 140         set_focus(conn, client);
 141
 142         /* Let’s see if this was on the borders (= resize). If not, we’re done */
 143         i3Font *font = load_font(conn, pattern);
 144         printf("press button on x=%d, y=%d\n", event->event_x, event->event_y);
 145         if (event->event_y <= (font->height + 2))
 146                 return 1;
 147
 148         printf("that was resize\n");
 149
 150         /* Open a new window, the resizebar. Grab the pointer and move the window around
 151            as the user moves the pointer. */
 152
 153
 154         /* TODO: the whole logic is missing. this is just a proof of concept */
 155         xcb_window_t grabwin = xcb_generate_id(conn);
 156
 157         uint32_t mask = 0;
 158         uint32_t values[3];
 159
 160         xcb_create_window(conn,
 161                         0,
 162                         grabwin,
 163                         root,
 164                         0, /* x */
 165                         0, /* y */
 166                         root_screen->width_in_pixels, /* width */
 167                         root_screen->height_in_pixels, /* height */
 168                         /* border_width */ 0,
 169                         XCB_WINDOW_CLASS_INPUT_ONLY,
 170                         root_screen->root_visual,
 171                         0,
 172                         values);
 173
 174         /* Map the window on the screen (= make it visible) */
 175         xcb_map_window(conn, grabwin);
 176
 177         xcb_window_t helpwin = xcb_generate_id(conn);
 178
 179         mask = XCB_CW_BACK_PIXEL;
 180         values[0] = root_screen->white_pixel;
 181         xcb_create_window(conn, root_screen->root_depth, helpwin, root,
 182                         event->root_x,
 183                         0,
 184                         5,
 185                         root_screen->height_in_pixels,
 186                         /* bordor */ 0,
 187                         XCB_WINDOW_CLASS_INPUT_OUTPUT,
 188                         root_screen->root_visual,
 189                         mask,
 190                         values);
 191
 192         xcb_map_window(conn, helpwin);
 193         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
 194
 195         xcb_grab_pointer(conn, false, root, XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION,
 196                         XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC, grabwin, XCB_NONE, XCB_CURRENT_TIME);
 197
 198         xcb_flush(conn);
 199
 200         xcb_generic_event_t *inside_event;
 201         /* I’ve always wanted to have my own eventhandler… */
 202         while ((inside_event = xcb_wait_for_event(conn))) {
 203                 /* Same as get_event_handler in xcb */
 204                 int nr = inside_event->response_type;
 205                 if (nr == 0) {
 206                         handle_event(NULL, conn, inside_event);
 207                         continue;
 208                 }
 209                 assert(nr < 256);
 210                 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 211                 assert(nr >= 2);
 212
 213                 /* Check if we need to escape this loop… */
 214                 if (nr == XCB_BUTTON_RELEASE)
 215                         break;
 216
 217                 switch (nr) {
 218                         case XCB_MOTION_NOTIFY:
 219                                 values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_x;
 220                                 xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
 221                                 xcb_flush(conn);
 222                                 break;
 223                         case XCB_EXPOSE:
 224                                 /* Use original handler */
 225                                 xcb_event_handle(&evenths, inside_event);
 226                                 break;
 227                         default:
 228                                 printf("Ignoring event of type %d\n", nr);
 229                                 break;
 230                 }
 231                 printf("---\n");
 232                 free(inside_event);
 233         }
 234
 235         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 236         xcb_destroy_window(conn, helpwin);
 237         xcb_destroy_window(conn, grabwin);
 238         xcb_flush(conn);
 239
 240         return 1;
 241 }
 242
 243 int handle_map_notify_event(void *prophs, xcb_connection_t *conn, xcb_map_notify_event_t *event) {
 244         window_attributes_t wa = { TAG_VALUE };
 245         wa.u.override_redirect = event->override_redirect;
 246         printf("MapNotify for 0x%08x.\n", event->window);
 247         manage_window(prophs, conn, event->window, wa);
 248         return 1;
 249 }
 250
 251 /*
 252  * Our window decorations were unmapped. That means, the window will be killed now,
 253  * so we better clean up before.
 254  *
 255  */
 256 int handle_unmap_notify_event(void *data, xcb_connection_t *c, xcb_unmap_notify_event_t *e) {
 257         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(c)).data->root;
 258
 259         Client *client = table_get(byChild, e->window);
 260         /* First, we need to check if the client is awaiting an unmap-request which
 261            was generated by us reparenting the window. In that case, we just ignore it. */
 262         if (client != NULL && client->awaiting_useless_unmap) {
 263                 printf("Dropping this unmap request, it was generated by reparenting\n");
 264                 client->awaiting_useless_unmap = false;
 265                 return 1;
 266         }
 267         client = table_remove(byChild, e->window);
 268
 269         printf("UnmapNotify for 0x%08x (received from 0x%08x): ", e->window, e->event);
 270         if(client == NULL) {
 271                 printf("not a managed window. Ignoring.\n");
 272                 return 0;
 273         }
 274
 275
 276         if (client->container->currently_focused == client)
 277                 client->container->currently_focused = NULL;
 278         CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
 279
 280         printf("child of 0x%08x.\n", client->frame);
 281         xcb_reparent_window(c, client->child, root, 0, 0);
 282         xcb_destroy_window(c, client->frame);
 283         xcb_flush(c);
 284         table_remove(byParent, client->frame);
 285         free(client);
 286
 287         render_layout(c);
 288
 289         return 1;
 290 }
 291
 292 /*
 293  * Called when a window changes its title
 294  *
 295  */
 296 int handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
 297                                 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
 298         printf("window's name changed.\n");
 299         Client *client = table_get(byChild, window);
 300         if (client == NULL)
 301                 return 1;
 302
 303         client->name_len = xcb_get_property_value_length(prop);
 304         client->name = malloc(client->name_len);
 305         strncpy(client->name, xcb_get_property_value(prop), client->name_len);
 306         printf("rename to \"%.*s\".\n", client->name_len, client->name);
 307
 308         decorate_window(conn, client);
 309         xcb_flush(conn);
 310
 311         return 1;
 312 }
 313
 314 /*
 315  * Expose event means we should redraw our windows (= title bar)
 316  *
 317  */
 318 int handle_expose_event(void *data, xcb_connection_t *conn, xcb_expose_event_t *e) {
 319         printf("handle_expose_event()\n");
 320         Client *client = table_get(byParent, e->window);
 321         if(!client || e->count != 0)
 322                 return 1;
 323         decorate_window(conn, client);
 324         return 1;
 325 }
 326
 327 /*
 328  * Handle client messages (EWMH)
 329  *
 330  */
 331 int handle_client_message(void *data, xcb_connection_t *conn, xcb_client_message_event_t *event) {
 332         printf("client_message\n");
 333
 334         if (event->type == atoms[_NET_WM_STATE]) {
 335                 if (event->format != 32 || event->data.data32[1] != atoms[_NET_WM_STATE_FULLSCREEN])
 336                         return 0;
 337
 338                 printf("fullscreen\n");
 339
 340                 Client *client = table_get(byChild, event->window);
 341                 if (client == NULL)
 342                         return 0;
 343
 344                 /* Check if the fullscreen state should be toggled… */
 345                 if ((client->fullscreen &&
 346                      (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
 347                       event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
 348                     (!client->fullscreen &&
 349                      (event->data.data32[0] == _NET_WM_STATE_ADD ||
 350                       event->data.data32[0] == _NET_WM_STATE_TOGGLE)))
 351                         toggle_fullscreen(conn, client);
 352         } else {
 353                 printf("unhandled clientmessage\n");
 354                 return 0;
 355         }
 356
 357         return 1;
 358 }