git.sur5r.net Git - i3/i3/blob - src/mainx.c

   1 #define _GNU_SOURCE
   2 #include <stdio.h>
   3 #include <assert.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <sys/types.h>
   7 #include <unistd.h>
   8 #include <stdbool.h>
   9 #include <assert.h>
  10
  11 #include <xcb/xcb.h>
  12
  13 #include <X11/XKBlib.h>
  14 #include <X11/extensions/XKB.h>
  15
  16 #include <xcb/xcb_wm.h>
  17 #include <xcb/xcb_aux.h>
  18 #include <xcb/xcb_event.h>
  19 #include <xcb/xcb_property.h>
  20 #include <xcb/xcb_keysyms.h>
  21 #include <xcb/xcb_icccm.h>
  22 #include <xcb/xinerama.h>
  23 #include "data.h"
  24
  25 #include "queue.h"
  26 #include "table.h"
  27 #include "font.h"
  28 #include "layout.h"
  29 #include "debug.h"
  30 #include "handlers.h"
  31 #include "util.h"
  32
  33 #define TERMINAL "/usr/pkg/bin/urxvt"
  34
  35 Display *xkbdpy;
  36
  37 TAILQ_HEAD(bindings_head, Binding) bindings;
  38 xcb_event_handlers_t evenths;
  39
  40 static const int TOP = 20;
  41 static const int LEFT = 5;
  42 static const int BOTTOM = 5;
  43 static const int RIGHT = 5;
  44
  45 /* This is the filtered environment which will be passed to opened applications.
  46  * It contains DISPLAY (naturally) and locales stuff (LC_*, LANG) */
  47 char **environment;
  48
  49 /* hm, xcb_wm wants us to implement this. */
  50 table_t *byChild = 0;
  51 table_t *byParent = 0;
  52 xcb_window_t root_win;
  53
  54 char *pattern = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso8859-1";
  55 int num_screens = 0;
  56
  57 /*
  58  *
  59  * TODO: what exactly does this, what happens if we leave stuff out?
  60  *
  61  */
  62 void manage_window(xcb_property_handlers_t *prophs, xcb_connection_t *c, xcb_window_t window, window_attributes_t wa)
  63 {
  64         printf("managing window.\n");
  65         xcb_drawable_t d = { window };
  66         xcb_get_geometry_cookie_t geomc;
  67         xcb_get_geometry_reply_t *geom;
  68         xcb_get_window_attributes_reply_t *attr = 0;
  69         if(wa.tag == TAG_COOKIE)
  70         {
  71                 attr = xcb_get_window_attributes_reply(c, wa.u.cookie, 0);
  72                 if(!attr)
  73                         return;
  74                 if(attr->map_state != XCB_MAP_STATE_VIEWABLE)
  75                 {
  76                         printf("Window 0x%08x is not mapped. Ignoring.\n", window);
  77                         free(attr);
  78                         return;
  79                 }
  80                 wa.tag = TAG_VALUE;
  81                 wa.u.override_redirect = attr->override_redirect;
  82         }
  83         if(!wa.u.override_redirect && table_get(byChild, window))
  84         {
  85                 printf("Window 0x%08x already managed. Ignoring.\n", window);
  86                 free(attr);
  87                 return;
  88         }
  89         if(wa.u.override_redirect)
  90         {
  91                 printf("Window 0x%08x has override-redirect set. Ignoring.\n", window);
  92                 free(attr);
  93                 return;
  94         }
  95         geomc = xcb_get_geometry(c, d);
  96         if(!attr)
  97         {
  98                 wa.tag = TAG_COOKIE;
  99                 wa.u.cookie = xcb_get_window_attributes(c, window);
 100                 attr = xcb_get_window_attributes_reply(c, wa.u.cookie, 0);
 101         }
 102         geom = xcb_get_geometry_reply(c, geomc, 0);
 103         if(attr && geom)
 104         {
 105                 reparent_window(c, window, attr->visual, geom->root, geom->depth, geom->x, geom->y, geom->width, geom->height);
 106                 xcb_property_changed(prophs, XCB_PROPERTY_NEW_VALUE, window, WM_NAME);
 107         }
 108         free(attr);
 109         free(geom);
 110 }
 111
 112 /*
 113  * Let’s own this window…
 114  *
 115  */
 116 void reparent_window(xcb_connection_t *conn, xcb_window_t child,
 117                 xcb_visualid_t visual, xcb_window_t root, uint8_t depth,
 118                 int16_t x, int16_t y, uint16_t width, uint16_t height) {
 119
 120         Client *new = table_get(byChild, child);
 121         if (new == NULL) {
 122                 printf("oh, it's new\n");
 123                 new = calloc(sizeof(Client), 1);
 124                 new->x = -1;
 125                 new->y = -1;
 126         }
 127         uint32_t mask = 0;
 128         uint32_t values[3];
 129
 130         /* Insert into the currently active container */
 131         CIRCLEQ_INSERT_TAIL(&(CUR_CELL->clients), new, clients);
 132
 133         printf("currently_focused = %p\n", new);
 134         CUR_CELL->currently_focused = new;
 135         new->container = CUR_CELL;
 136
 137         new->frame = xcb_generate_id(conn);
 138         new->child = child;
 139         new->width = width;
 140         new->height = height;
 141
 142         /* Don’t generate events for our new window, it should *not* be managed */
 143         mask |= XCB_CW_OVERRIDE_REDIRECT;
 144         values[0] = 1;
 145
 146         /* We want to know when… */
 147         mask |= XCB_CW_EVENT_MASK;
 148         values[1] =     XCB_EVENT_MASK_BUTTON_PRESS | /* …mouse is pressed/released */
 149                         XCB_EVENT_MASK_BUTTON_RELEASE |
 150                         XCB_EVENT_MASK_EXPOSURE | /* …our window needs to be redrawn */
 151                         XCB_EVENT_MASK_ENTER_WINDOW /* …user moves cursor inside our window */;
 152
 153         printf("Reparenting 0x%08x under 0x%08x.\n", child, new->frame);
 154
 155         /* Yo dawg, I heard you like windows, so I create a window around your window… */
 156         xcb_create_window(conn,
 157                         depth,
 158                         new->frame,
 159                         root,
 160                         x,
 161                         y,
 162                         width + LEFT + RIGHT,
 163                         height + TOP + BOTTOM,
 164                         /* border_width */ 0,
 165                         XCB_WINDOW_CLASS_INPUT_OUTPUT,
 166                         visual,
 167                         mask,
 168                         values);
 169         xcb_change_save_set(conn, XCB_SET_MODE_INSERT, child);
 170
 171         /* Map the window on the screen (= make it visible) */
 172         xcb_map_window(conn, new->frame);
 173
 174         /* Generate a graphics context for the titlebar */
 175         new->titlegc = xcb_generate_id(conn);
 176         xcb_create_gc(conn, new->titlegc, new->frame, 0, 0);
 177
 178         /* Draw decorations */
 179         decorate_window(conn, new);
 180
 181         /* Put our data structure (Client) into the table */
 182         table_put(byParent, new->frame, new);
 183         table_put(byChild, child, new);
 184
 185         /* Moves the original window into the new frame we've created for it */
 186         i3Font *font = load_font(conn, pattern);
 187         xcb_reparent_window(conn, child, new->frame, 0, font->height);
 188
 189         /* We are interested in property changes */
 190         mask = XCB_CW_EVENT_MASK;
 191         values[0] =     XCB_EVENT_MASK_PROPERTY_CHANGE |
 192                         XCB_EVENT_MASK_STRUCTURE_NOTIFY |
 193                         XCB_EVENT_MASK_ENTER_WINDOW |
 194                         XCB_EVENT_MASK_BUTTON_PRESS;
 195         xcb_change_window_attributes(conn, child, mask, values);
 196
 197         /* We need to grab the mouse buttons for click to focus */
 198         xcb_grab_button(conn, false, child, XCB_EVENT_MASK_BUTTON_PRESS,
 199                         XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC, root, XCB_NONE, 1 /* left mouse button */,
 200                         XCB_BUTTON_MASK_ANY /* don’t filter for any modifiers */);
 201
 202         /* Focus the new window */
 203         xcb_set_input_focus(conn, XCB_INPUT_FOCUS_NONE, new->child, XCB_CURRENT_TIME);
 204
 205         render_layout(conn);
 206 }
 207
 208 void manage_existing_windows(xcb_connection_t *c, xcb_property_handlers_t *prophs, xcb_window_t root) {
 209         xcb_query_tree_cookie_t wintree;
 210         xcb_query_tree_reply_t *rep;
 211         int i, len;
 212         xcb_window_t *children;
 213         xcb_get_window_attributes_cookie_t *cookies;
 214
 215         wintree = xcb_query_tree(c, root);
 216         rep = xcb_query_tree_reply(c, wintree, 0);
 217         if(!rep)
 218                 return;
 219         len = xcb_query_tree_children_length(rep);
 220         cookies = malloc(len * sizeof(*cookies));
 221         if(!cookies)
 222         {
 223                 free(rep);
 224                 return;
 225         }
 226         children = xcb_query_tree_children(rep);
 227         for(i = 0; i < len; ++i)
 228                 cookies[i] = xcb_get_window_attributes(c, children[i]);
 229         for(i = 0; i < len; ++i)
 230         {
 231                 window_attributes_t wa = { TAG_COOKIE, { cookies[i] } };
 232                 manage_window(prophs, c, children[i], wa);
 233         }
 234         free(rep);
 235 }
 236
 237 static void initialize_xinerama(xcb_connection_t *conn) {
 238         xcb_xinerama_query_screens_reply_t *reply;
 239         xcb_xinerama_screen_info_t *screen_info;
 240         int screen;
 241
 242         if (!xcb_get_extension_data(conn, &xcb_xinerama_id)->present) {
 243                 printf("Xinerama extension not found, disabling.\n");
 244                 return;
 245         }
 246
 247         if (!xcb_xinerama_is_active_reply(conn, xcb_xinerama_is_active(conn), NULL)->state) {
 248                 printf("Xinerama is not active (in your X-Server), disabling.\n");
 249                 return;
 250         }
 251
 252
 253         reply = xcb_xinerama_query_screens_reply(conn, xcb_xinerama_query_screens_unchecked(conn), NULL);
 254         /* TODO: error check */
 255         screen_info = xcb_xinerama_query_screens_screen_info(reply);
 256
 257         num_screens = xcb_xinerama_query_screens_screen_info_length(reply);
 258
 259         /* Just go through each workspace and associate as many screens as we can. */
 260         for (screen = 0; screen < num_screens; screen++) {
 261                 workspaces[screen].x = screen_info[screen].x_org;
 262                 workspaces[screen].y = screen_info[screen].y_org;
 263                 workspaces[screen].width = screen_info[screen].width;
 264                 workspaces[screen].height = screen_info[screen].height;
 265                 workspaces[screen].screen_num = screen;
 266
 267                 printf("found Xinerama screen: %d x %d at %d x %d\n",
 268                                 screen_info[screen].width, screen_info[screen].height,
 269                                 screen_info[screen].x_org, screen_info[screen].y_org);
 270         }
 271
 272         free(screen_info);
 273 }
 274
 275 int main(int argc, char *argv[], char *env[]) {
 276         int i, e = 0;
 277
 278         for (i = 0; (env[i] != NULL); i++)
 279                 if (strncmp(env[i], "LC_", strlen("LC_")) == 0 ||
 280                         strncmp(env[i], "LANG=", strlen("LANG=")) == 0 ||
 281                         strncmp(env[i], "DISPLAY=", strlen("DISPLAY=")) == 0) {
 282                         printf("Passing environment \"%s\"\n", env[i]);
 283                         environment = realloc(environment, sizeof(char*) * ++e);
 284                         environment[e-1] = env[i];
 285                 }
 286
 287         /* environment has to be NULL-terminated */
 288         environment = realloc(environment, sizeof(char*) * ++e);
 289         environment[e-1] = NULL;
 290
 291         init_table();
 292
 293         xcb_connection_t *c;
 294         xcb_property_handlers_t prophs;
 295         xcb_window_t root;
 296
 297         int screens;
 298
 299         memset(&evenths, 0, sizeof(xcb_event_handlers_t));
 300         memset(&prophs, 0, sizeof(xcb_property_handlers_t));
 301
 302         byChild = alloc_table();
 303         byParent = alloc_table();
 304
 305         TAILQ_INIT(&bindings);
 306
 307         c = xcb_connect(NULL, &screens);
 308
 309         printf("x screen is %d\n", screens);
 310
 311         /* TODO: this has to be more beautiful somewhen */
 312         int major, minor, error;
 313
 314         major = XkbMajorVersion;
 315         minor = XkbMinorVersion;
 316
 317         int evBase, errBase;
 318
 319         if ((xkbdpy = XkbOpenDisplay(getenv("DISPLAY"), &evBase, &errBase, &major, &minor, &error)) == NULL) {
 320                 fprintf(stderr, "XkbOpenDisplay() failed\n");
 321                 return 1;
 322         }
 323
 324         int i1;
 325         if (!XkbQueryExtension(xkbdpy,&i1,&evBase,&errBase,&major,&minor)) {
 326                 fprintf(stderr, "XKB not supported by X-server\n");
 327                 return 1;
 328         }
 329         /* end of ugliness */
 330
 331         xcb_event_handlers_init(c, &evenths);
 332         for(i = 2; i < 128; ++i)
 333                 xcb_event_set_handler(&evenths, i, handle_event, 0);
 334
 335         for(i = 0; i < 256; ++i)
 336                 xcb_event_set_error_handler(&evenths, i, (xcb_generic_error_handler_t)handle_event, 0);
 337
 338         /* Expose = an Application should redraw itself. That is, we have to redraw our
 339          * contents (= top/bottom bar, titlebars for each window) */
 340         xcb_event_set_expose_handler(&evenths, handle_expose_event, 0);
 341
 342         /* Key presses/releases are pretty obvious, I think */
 343         xcb_event_set_key_press_handler(&evenths, handle_key_press, 0);
 344         xcb_event_set_key_release_handler(&evenths, handle_key_release, 0);
 345
 346         /* Enter window = user moved his mouse over the window */
 347         xcb_event_set_enter_notify_handler(&evenths, handle_enter_notify, 0);
 348
 349         /* Button press = user pushed a mouse button over one of our windows */
 350         xcb_event_set_button_press_handler(&evenths, handle_button_press, 0);
 351
 352         xcb_event_set_unmap_notify_handler(&evenths, handle_unmap_notify_event, 0);
 353
 354         xcb_property_handlers_init(&prophs, &evenths);
 355         xcb_event_set_map_notify_handler(&evenths, handle_map_notify_event, &prophs);
 356
 357         xcb_watch_wm_name(&prophs, 128, handle_windowname_change, 0);
 358
 359         root = xcb_aux_get_screen(c, screens)->root;
 360         root_win = root;
 361
 362         uint32_t mask = XCB_CW_EVENT_MASK;
 363         uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY | XCB_EVENT_MASK_PROPERTY_CHANGE };
 364         xcb_change_window_attributes(c, root, mask, values);
 365
 366         #define BIND(key, modifier, cmd) { \
 367                 Binding *new = malloc(sizeof(Binding)); \
 368                 new->keycode = key; \
 369                 new->mods = modifier; \
 370                 new->command = cmd; \
 371                 TAILQ_INSERT_TAIL(&bindings, new, bindings); \
 372         }
 373
 374         /* 38 = 'a' */
 375         BIND(38, BIND_MODE_SWITCH, "foo");
 376
 377         BIND(30, 0, "exec /usr/pkg/bin/urxvt");
 378
 379         BIND(44, BIND_MOD_1, "h");
 380         BIND(45, BIND_MOD_1, "j");
 381         BIND(46, BIND_MOD_1, "k");
 382         BIND(47, BIND_MOD_1, "l");
 383
 384         BIND(44, BIND_MOD_1 | BIND_CONTROL, "sh");
 385         BIND(45, BIND_MOD_1 | BIND_CONTROL, "sj");
 386         BIND(46, BIND_MOD_1 | BIND_CONTROL, "sk");
 387         BIND(47, BIND_MOD_1 | BIND_CONTROL, "sl");
 388
 389         BIND(44, BIND_MOD_1 | BIND_SHIFT, "mh");
 390         BIND(45, BIND_MOD_1 | BIND_SHIFT, "mj");
 391         BIND(46, BIND_MOD_1 | BIND_SHIFT, "mk");
 392         BIND(47, BIND_MOD_1 | BIND_SHIFT, "ml");
 393
 394         BIND(10, BIND_MOD_1 , "1");
 395         BIND(11, BIND_MOD_1 , "2");
 396         BIND(12, BIND_MOD_1 , "3");
 397         BIND(13, BIND_MOD_1 , "4");
 398         BIND(14, BIND_MOD_1 , "5");
 399         BIND(15, BIND_MOD_1 , "6");
 400         BIND(16, BIND_MOD_1 , "7");
 401         BIND(17, BIND_MOD_1 , "8");
 402         BIND(18, BIND_MOD_1 , "9");
 403         BIND(19, BIND_MOD_1 , "0");
 404
 405         Binding *bind;
 406         TAILQ_FOREACH(bind, &bindings, bindings) {
 407                 printf("Grabbing %d\n", bind->keycode);
 408                 if (bind->mods & BIND_MODE_SWITCH)
 409                         xcb_grab_key(c, 0, root, 0, bind->keycode, XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_SYNC);
 410                 else xcb_grab_key(c, 0, root, bind->mods, bind->keycode, XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC);
 411         }
 412
 413         /* check for Xinerama */
 414         printf("Checking for Xinerama...\n");
 415         initialize_xinerama(c);
 416
 417         start_application(TERMINAL, NULL);
 418
 419         xcb_flush(c);
 420
 421         manage_existing_windows(c, &prophs, root);
 422
 423         xcb_event_wait_for_event_loop(&evenths);
 424
 425         /* not reached */
 426         return 0;
 427 }