git.sur5r.net Git - i3/i3/blob - handlers.c

   1 #include <stdio.h>
   2 #include <assert.h>
   3 #include <string.h>
   4 #include <stdlib.h>
   5 #include <xcb/xcb.h>
   6
   7 #include <xcb/xcb_wm.h>
   8 #include <X11/XKBlib.h>
   9
  10 #include "i3.h"
  11 #include "debug.h"
  12 #include "table.h"
  13 #include "layout.h"
  14 #include "commands.h"
  15 #include "data.h"
  16 #include "font.h"
  17
  18 static void set_focus(xcb_connection_t *conn, Client *client) {
  19         /* Update container */
  20         Client *old_client = client->container->currently_focused;
  21         client->container->currently_focused = client;
  22
  23         current_col = client->container->col;
  24         current_row = client->container->row;
  25
  26         /* Set focus to the entered window, and flush xcb buffer immediately */
  27         xcb_set_input_focus(conn, XCB_INPUT_FOCUS_NONE, client->child, XCB_CURRENT_TIME);
  28         /* Update last/current client’s titlebar */
  29         if (old_client != NULL)
  30                 decorate_window(conn, old_client);
  31         decorate_window(conn, client);
  32         xcb_flush(conn);
  33 }
  34
  35
  36 /*
  37  * Due to bindings like Mode_switch + <a>, we need to bind some keys in XCB_GRAB_MODE_SYNC.
  38  * Therefore, we just replay all key presses.
  39  *
  40  */
  41 int handle_key_release(void *ignored, xcb_connection_t *conn, xcb_key_release_event_t *event) {
  42         printf("got key release, just passing\n");
  43         xcb_allow_events(conn, XCB_ALLOW_REPLAY_KEYBOARD, event->time);
  44         xcb_flush(conn);
  45         return 1;
  46 }
  47
  48 /*
  49  * There was a key press. We lookup the key symbol and see if there are any bindings
  50  * on that. This allows to do things like binding special characters (think of ä) to
  51  * functions to get one more modifier while not losing AltGr :-)
  52  * TODO: this description needs to be more understandable
  53  *
  54  */
  55 int handle_key_press(void *ignored, xcb_connection_t *conn, xcb_key_press_event_t *event) {
  56         printf("Keypress %d\n", event->detail);
  57
  58         /* We need to get the keysym group (There are group 1 to group 4, each holding
  59            two keysyms (without shift and with shift) using Xkb because X fails to
  60            provide them reliably (it works in Xephyr, it does not in real X) */
  61         XkbStateRec state;
  62         if (XkbGetState(xkbdpy, XkbUseCoreKbd, &state) == Success && (state.group+1) == 2)
  63                 event->state |= 0x2;
  64
  65         printf("state %d\n", event->state);
  66
  67         /* Find the binding */
  68         /* TODO: event->state durch eine bitmask filtern und dann direkt vergleichen */
  69         Binding *bind, *best_match = TAILQ_END(&bindings);
  70         TAILQ_FOREACH(bind, &bindings, bindings) {
  71                 if (bind->keycode == event->detail &&
  72                         (bind->mods & event->state) == bind->mods) {
  73                         if (best_match == TAILQ_END(&bindings) ||
  74                                 bind->mods > best_match->mods)
  75                                 best_match = bind;
  76                 }
  77         }
  78
  79         /* No match? Then it was an actively grabbed key, that is with Mode_switch, and
  80            the user did not press Mode_switch, so just pass it… */
  81         if (best_match == TAILQ_END(&bindings)) {
  82                 xcb_allow_events(conn, ReplayKeyboard, event->time);
  83                 xcb_flush(conn);
  84                 return 1;
  85         }
  86
  87         if (event->state & 0x2) {
  88                 printf("that's mode_switch\n");
  89                 parse_command(conn, best_match->command);
  90                 printf("ok, hiding this event.\n");
  91                 xcb_allow_events(conn, SyncKeyboard, event->time);
  92                 xcb_flush(conn);
  93                 return 1;
  94         }
  95
  96         parse_command(conn, best_match->command);
  97         return 1;
  98 }
  99
 100
 101 /*
 102  * When the user moves the mouse pointer onto a window, this callback gets called.
 103  *
 104  */
 105 int handle_enter_notify(void *ignored, xcb_connection_t *conn, xcb_enter_notify_event_t *event) {
 106         printf("enter_notify\n");
 107
 108         /* This was either a focus for a client’s parent (= titlebar)… */
 109         Client *client = table_get(byParent, event->event);
 110         /* …or the client itself */
 111         if (client == NULL)
 112                 client = table_get(byChild, event->event);
 113
 114         /* If not, then this event is not interesting. This should not happen */
 115         if (client == NULL) {
 116                 printf("DEBUG: Uninteresting enter_notify-event?\n");
 117                 return 1;
 118         }
 119
 120         set_focus(conn, client);
 121
 122         return 1;
 123 }
 124
 125 int handle_button_press(void *ignored, xcb_connection_t *conn, xcb_button_press_event_t *event) {
 126         printf("button press!\n");
 127         /* This was either a focus for a client’s parent (= titlebar)… */
 128         Client *client = table_get(byChild, event->event);
 129         if (client == NULL)
 130                 client = table_get(byParent, event->event);
 131         if (client == NULL)
 132                 return 1;
 133
 134         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 135         xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
 136
 137         /* Set focus in any case */
 138         set_focus(conn, client);
 139
 140         /* Let’s see if this was on the borders (= resize). If not, we’re done */
 141         i3Font *font = load_font(conn, pattern);
 142         printf("press button on x=%d, y=%d\n", event->event_x, event->event_y);
 143         if (event->event_y <= (font->height + 2))
 144                 return 1;
 145
 146         printf("that was resize\n");
 147
 148         /* Open a new window, the resizebar. Grab the pointer and move the window around
 149            as the user moves the pointer. */
 150
 151
 152         /* TODO: the whole logic is missing. this is just a proof of concept */
 153         xcb_window_t grabwin = xcb_generate_id(conn);
 154
 155         uint32_t mask = 0;
 156         uint32_t values[3];
 157
 158         xcb_create_window(conn,
 159                         0,
 160                         grabwin,
 161                         root,
 162                         0, /* x */
 163                         0, /* y */
 164                         root_screen->width_in_pixels, /* width */
 165                         root_screen->height_in_pixels, /* height */
 166                         /* border_width */ 0,
 167                         XCB_WINDOW_CLASS_INPUT_ONLY,
 168                         root_screen->root_visual,
 169                         0,
 170                         values);
 171
 172         /* Map the window on the screen (= make it visible) */
 173         xcb_map_window(conn, grabwin);
 174
 175         xcb_window_t helpwin = xcb_generate_id(conn);
 176
 177         mask = XCB_CW_BACK_PIXEL;
 178         values[0] = root_screen->white_pixel;
 179         xcb_create_window(conn, root_screen->root_depth, helpwin, root,
 180                         event->root_x,
 181                         0,
 182                         5,
 183                         root_screen->height_in_pixels,
 184                         /* bordor */ 0,
 185                         XCB_WINDOW_CLASS_INPUT_OUTPUT,
 186                         root_screen->root_visual,
 187                         mask,
 188                         values);
 189
 190         xcb_map_window(conn, helpwin);
 191         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
 192
 193         xcb_grab_pointer(conn, false, root, XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION,
 194                         XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC, grabwin, XCB_NONE, XCB_CURRENT_TIME);
 195
 196         xcb_flush(conn);
 197
 198         xcb_generic_event_t *inside_event;
 199         /* I’ve always wanted to have my own eventhandler… */
 200         while ((inside_event = xcb_wait_for_event(conn))) {
 201                 /* Same as get_event_handler in xcb */
 202                 int nr = inside_event->response_type;
 203                 if (nr == 0) {
 204                         handle_event(NULL, conn, inside_event);
 205                         continue;
 206                 }
 207                 assert(nr < 256);
 208                 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 209                 assert(nr >= 2);
 210
 211                 /* Check if we need to escape this loop… */
 212                 if (nr == XCB_BUTTON_RELEASE)
 213                         break;
 214
 215                 switch (nr) {
 216                         case XCB_MOTION_NOTIFY:
 217                                 values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_x;
 218                                 xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
 219                                 xcb_flush(conn);
 220                                 break;
 221                         case XCB_EXPOSE:
 222                                 /* Use original handler */
 223                                 xcb_event_handle(&evenths, inside_event);
 224                                 break;
 225                         default:
 226                                 printf("Ignoring event of type %d\n", nr);
 227                                 break;
 228                 }
 229                 printf("---\n");
 230                 free(inside_event);
 231         }
 232
 233         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 234         xcb_destroy_window(conn, helpwin);
 235         xcb_destroy_window(conn, grabwin);
 236         xcb_flush(conn);
 237
 238         return 1;
 239 }
 240
 241 int handle_map_notify_event(void *prophs, xcb_connection_t *conn, xcb_map_notify_event_t *event) {
 242         window_attributes_t wa = { TAG_VALUE };
 243         wa.u.override_redirect = event->override_redirect;
 244         printf("MapNotify for 0x%08x.\n", event->window);
 245         manage_window(prophs, conn, event->window, wa);
 246         return 1;
 247 }
 248
 249 /*
 250  * Our window decorations were unmapped. That means, the window will be killed now,
 251  * so we better clean up before.
 252  *
 253  */
 254 int handle_unmap_notify_event(void *data, xcb_connection_t *c, xcb_unmap_notify_event_t *e) {
 255         Client *client = table_remove(byChild, e->event);
 256         xcb_window_t root;
 257         printf("UnmapNotify for 0x%08x (received from 0x%08x): ", e->window, e->event);
 258         if(!client)
 259         {
 260                 printf("not a managed window. Ignoring.\n");
 261                 return 0;
 262         }
 263
 264         int rows, cols;
 265         Client *con_client;
 266         /* TODO: clear this up */
 267         for (cols = 0; cols < c_ws->cols; cols++)
 268                 for (rows = 0; rows < c_ws->rows; rows++)
 269                         CIRCLEQ_FOREACH(con_client, &(CUR_TABLE[cols][rows]->clients), clients)
 270                                 if (con_client == client) {
 271                                         printf("removing from container\n");
 272                                         if (client->container->currently_focused == client)
 273                                                 client->container->currently_focused = NULL;
 274                                         CIRCLEQ_REMOVE(&(CUR_TABLE[cols][rows]->clients), con_client, clients);
 275                                         break;
 276                                 }
 277
 278
 279
 280         root = xcb_setup_roots_iterator(xcb_get_setup(c)).data->root;
 281         printf("child of 0x%08x.\n", client->frame);
 282         xcb_reparent_window(c, client->child, root, 0, 0);
 283         xcb_destroy_window(c, client->frame);
 284         xcb_flush(c);
 285         table_remove(byParent, client->frame);
 286         free(client);
 287
 288         render_layout(c);
 289
 290         return 1;
 291 }
 292
 293 /*
 294  * Called when a window changes its title
 295  *
 296  */
 297 int handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
 298                                 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
 299         printf("window's name changed.\n");
 300         Client *client = table_get(byChild, window);
 301         if (client == NULL)
 302                 return 1;
 303
 304         client->name_len = xcb_get_property_value_length(prop);
 305         client->name = malloc(client->name_len);
 306         strncpy(client->name, xcb_get_property_value(prop), client->name_len);
 307         printf("rename to \"%.*s\".\n", client->name_len, client->name);
 308
 309         decorate_window(conn, client);
 310         xcb_flush(conn);
 311
 312         return 1;
 313 }
 314
 315 /*
 316  * Expose event means we should redraw our windows (= title bar)
 317  *
 318  */
 319 int handle_expose_event(void *data, xcb_connection_t *conn, xcb_expose_event_t *e) {
 320         printf("handle_expose_event()\n");
 321         Client *client = table_get(byParent, e->window);
 322         if(!client || e->count != 0)
 323                 return 1;
 324         decorate_window(conn, client);
 325         return 1;
 326 }