git.sur5r.net Git - i3/i3/blob - i3bar/src/xcb.c

   1 #include <xcb/xcb.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <i3/ipc.h>
   6 #include <ev.h>
   7
   8 #include "common.h"
   9
  10 #define NUM_ATOMS 3
  11
  12 enum {
  13     #define ATOM_DO(name) name,
  14     #include "xcb_atoms.def"
  15 };
  16
  17 xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
  18 xcb_atom_t               atoms[NUM_ATOMS];
  19
  20 xcb_connection_t *xcb_connection;
  21 xcb_screen_t     *xcb_screens;
  22 xcb_window_t     xcb_root;
  23 xcb_font_t       xcb_font;
  24
  25 ev_prepare *xcb_prep;
  26 ev_check   *xcb_chk;
  27 ev_io      *xcb_io;
  28
  29 uint32_t get_colorpixel(const char *s) {
  30     char strings[3][3] = { { s[0], s[1], '\0'} ,
  31                            { s[2], s[3], '\0'} ,
  32                            { s[4], s[5], '\0'} };
  33     uint8_t r = strtol(strings[0], NULL, 16);
  34     uint8_t g = strtol(strings[1], NULL, 16);
  35     uint8_t b = strtol(strings[2], NULL, 16);
  36     return (r << 16 | g << 8 | b);
  37 }
  38
  39 void handle_button(xcb_button_press_event_t *event) {
  40     i3_ws *cur_ws;
  41     i3_output *walk;
  42     xcb_window_t bar = event->event;
  43     SLIST_FOREACH(walk, outputs, slist) {
  44         if (walk->bar == bar) {
  45             break;
  46         }
  47     }
  48
  49     if (walk == NULL) {
  50         printf("Unknown Bar klicked!\n");
  51         return;
  52     }
  53
  54     TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
  55         if (cur_ws->visible) {
  56             break;
  57         }
  58     }
  59
  60     if (cur_ws == NULL) {
  61         printf("No Workspace active?\n");
  62         return;
  63     }
  64
  65     int32_t x = event->event_x;
  66
  67     printf("Got Button %d\n", event->detail);
  68
  69     switch (event->detail) {
  70         case 1:
  71             TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
  72                 printf("x = %d\n", x);
  73                 if (x < cur_ws->name_width + 10) {
  74                     break;
  75                 }
  76                 x -= cur_ws->name_width + 10;
  77             }
  78             if (cur_ws == NULL) {
  79                 return;
  80             }
  81             break;
  82         case 4:
  83             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head)) {
  84                 cur_ws = TAILQ_FIRST(walk->workspaces);
  85             } else {
  86                 cur_ws = TAILQ_NEXT(cur_ws, tailq);
  87             }
  88             break;
  89         case 5:
  90             if (cur_ws == TAILQ_FIRST(walk->workspaces)) {
  91                 cur_ws = TAILQ_LAST(walk->workspaces, ws_head);
  92             } else {
  93                 cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
  94             }
  95             break;
  96     }
  97
  98     char buffer[50];
  99     snprintf(buffer, 50, "%d", cur_ws->num);
 100     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 101 }
 102
 103 void handle_xcb_event(xcb_generic_event_t *event) {
 104     switch (event->response_type & ~0x80) {
 105         case XCB_EXPOSE:
 106             draw_bars();
 107             break;
 108         case XCB_BUTTON_PRESS:
 109             handle_button((xcb_button_press_event_t*) event);
 110             break;
 111     }
 112 }
 113
 114 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revenst) {
 115     xcb_flush(xcb_connection);
 116 }
 117
 118 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 119     xcb_generic_event_t *event;
 120     if ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
 121         handle_xcb_event(event);
 122     }
 123     FREE(event);
 124 }
 125
 126 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 127     /* Dummy Callback. We only need this, so that xcb-events trigger
 128      * Prepare- and Check-Watchers */
 129 }
 130
 131 int get_string_width(char *string) {
 132     xcb_query_text_extents_cookie_t cookie;
 133     xcb_query_text_extents_reply_t *reply;
 134     xcb_generic_error_t *error;
 135     int width;
 136
 137     cookie = xcb_query_text_extents(xcb_connection, xcb_font, strlen(string), (xcb_char2b_t*) string);
 138     if ((reply= xcb_query_text_extents_reply(xcb_connection, cookie, &error)) == NULL) {
 139         printf("ERROR: Could not get text extents!");
 140         return 7;
 141     }
 142
 143     width = reply->overall_width;
 144     free(reply);
 145     return width;
 146 }
 147
 148 void init_xcb() {
 149     /* FIXME: xcb_connect leaks Memory */
 150     xcb_connection = xcb_connect(NULL, NULL);
 151     if (xcb_connection_has_error(xcb_connection)) {
 152         printf("Cannot open display\n");
 153         exit(EXIT_FAILURE);
 154     }
 155     printf("Connected to xcb\n");
 156
 157     /* We have to request the atoms we need */
 158     #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
 159         #include "xcb_atoms.def"
 160
 161     xcb_screens = xcb_setup_roots_iterator(xcb_get_setup(xcb_connection)).data;
 162     xcb_root = xcb_screens->root;
 163
 164     xcb_font = xcb_generate_id(xcb_connection);
 165     char *fontname = "-misc-fixed-medium-r-semicondensed--12-110-75-75-c-60-iso10646-1";
 166     xcb_open_font(xcb_connection,
 167                   xcb_font,
 168                   strlen(fontname),
 169                   fontname);
 170
 171     xcb_list_fonts_with_info_cookie_t cookie;
 172     cookie = xcb_list_fonts_with_info(xcb_connection,
 173                                       1,
 174                                       strlen(fontname),
 175                                       fontname);
 176     xcb_list_fonts_with_info_reply_t *reply;
 177     reply = xcb_list_fonts_with_info_reply(xcb_connection,
 178                                            cookie,
 179                                            NULL);
 180     font_height = reply->font_ascent + reply->font_descent;
 181     FREE(reply);
 182     printf("Calculated Font-height: %d\n", font_height);
 183
 184     xcb_io = malloc(sizeof(ev_io));
 185     xcb_prep = malloc(sizeof(ev_prepare));
 186     xcb_chk = malloc(sizeof(ev_check));
 187
 188     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
 189     ev_prepare_init(xcb_prep, &xcb_prep_cb);
 190     ev_check_init(xcb_chk, &xcb_chk_cb);
 191
 192     ev_io_start(main_loop, xcb_io);
 193     ev_prepare_start(main_loop, xcb_prep);
 194     ev_check_start(main_loop, xcb_chk);
 195
 196     /* FIXME: Maybe we can push that further backwards */
 197     get_atoms();
 198 }
 199
 200 void clean_xcb() {
 201     xcb_disconnect(xcb_connection);
 202
 203     ev_check_stop(main_loop, xcb_chk);
 204     ev_prepare_stop(main_loop, xcb_prep);
 205     ev_io_stop(main_loop, xcb_io);
 206
 207     FREE(xcb_chk);
 208     FREE(xcb_prep);
 209     FREE(xcb_io);
 210 }
 211
 212 void get_atoms() {
 213     xcb_intern_atom_reply_t *reply;
 214     #define ATOM_DO(name) reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
 215         atoms[name] = reply->atom; \
 216         free(reply);
 217
 218     #include "xcb_atoms.def"
 219     printf("Got Atoms\n");
 220 }
 221
 222 void destroy_windows() {
 223     i3_output *walk;
 224     if (outputs == NULL) {
 225         return;
 226     }
 227     SLIST_FOREACH(walk, outputs, slist) {
 228         if (walk->bar == XCB_NONE) {
 229             continue;
 230         }
 231         xcb_destroy_window(xcb_connection, walk->bar);
 232         walk->bar = XCB_NONE;
 233     }
 234 }
 235
 236 void create_windows() {
 237     uint32_t mask;
 238     uint32_t values[2];
 239
 240     i3_output *walk;
 241     SLIST_FOREACH(walk, outputs, slist) {
 242         if (!walk->active) {
 243             continue;
 244         }
 245         printf("Creating Window for output %s\n", walk->name);
 246
 247         walk->bar = xcb_generate_id(xcb_connection);
 248         mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK;
 249         values[0] = xcb_screens->black_pixel;
 250         values[1] = XCB_EVENT_MASK_EXPOSURE |
 251                     XCB_EVENT_MASK_BUTTON_PRESS;
 252         xcb_create_window(xcb_connection,
 253                           xcb_screens->root_depth,
 254                           walk->bar,
 255                           xcb_root,
 256                           walk->rect.x, walk->rect.y,
 257                           walk->rect.w, font_height + 6,
 258                           1,
 259                           XCB_WINDOW_CLASS_INPUT_OUTPUT,
 260                           xcb_screens->root_visual,
 261                           mask,
 262                           values);
 263
 264         xcb_change_property(xcb_connection,
 265                             XCB_PROP_MODE_REPLACE,
 266                             walk->bar,
 267                             atoms[_NET_WM_WINDOW_TYPE],
 268                             atoms[ATOM],
 269                             32,
 270                             1,
 271                             (unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
 272
 273         walk->bargc = xcb_generate_id(xcb_connection);
 274         mask = XCB_GC_FONT;
 275         values[0] = xcb_font;
 276         xcb_create_gc(xcb_connection,
 277                       walk->bargc,
 278                       walk->bar,
 279                       mask,
 280                       values);
 281
 282         xcb_map_window(xcb_connection, walk->bar);
 283     }
 284     xcb_flush(xcb_connection);
 285 }
 286
 287 void draw_bars() {
 288     printf("Drawing Bars...\n");
 289     int i = 0;
 290     i3_output *outputs_walk;
 291     SLIST_FOREACH(outputs_walk, outputs, slist) {
 292         if (!outputs_walk->active) {
 293             printf("Output %s inactive, skipping...\n", outputs_walk->name);
 294             continue;
 295         }
 296         if (outputs_walk->bar == XCB_NONE) {
 297             create_windows();
 298         }
 299         uint32_t color = get_colorpixel("000000");
 300         xcb_change_gc(xcb_connection,
 301                       outputs_walk->bargc,
 302                       XCB_GC_FOREGROUND,
 303                       &color);
 304         xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font_height + 6 };
 305         xcb_poly_fill_rectangle(xcb_connection,
 306                                 outputs_walk->bar,
 307                                 outputs_walk->bargc,
 308                                 1,
 309                                 &rect);
 310         if (statusline != NULL) {
 311             printf("Printing statusline!\n");
 312             xcb_change_gc(xcb_connection,
 313                           outputs_walk->bargc,
 314                           XCB_GC_BACKGROUND,
 315                           &color);
 316             color = get_colorpixel("FFFFFF");
 317             xcb_change_gc(xcb_connection,
 318                           outputs_walk->bargc,
 319                           XCB_GC_FOREGROUND,
 320                           &color);
 321
 322             xcb_image_text_8(xcb_connection,
 323                              strlen(statusline),
 324                              outputs_walk->bar,
 325                              outputs_walk->bargc,
 326                              outputs_walk->rect.w - get_string_width(statusline) - 4,
 327                              font_height + 1,
 328                              statusline);
 329         }
 330         i3_ws *ws_walk;
 331         TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
 332             printf("Drawing Button for WS %s at x = %d\n", ws_walk->name, i);
 333             uint32_t color = get_colorpixel("240000");
 334             if (ws_walk->visible) {
 335                 color = get_colorpixel("480000");
 336             }
 337             if (ws_walk->urgent) {
 338                 printf("WS %s is urgent!\n", ws_walk->name);
 339                 color = get_colorpixel("002400");
 340             }
 341             xcb_change_gc(xcb_connection,
 342                           outputs_walk->bargc,
 343                           XCB_GC_FOREGROUND,
 344                           &color);
 345             xcb_change_gc(xcb_connection,
 346                           outputs_walk->bargc,
 347                           XCB_GC_BACKGROUND,
 348                           &color);
 349             xcb_rectangle_t rect = { i + 1, 1, ws_walk->name_width + 8, font_height + 4 };
 350             xcb_poly_fill_rectangle(xcb_connection,
 351                                     outputs_walk->bar,
 352                                     outputs_walk->bargc,
 353                                     1,
 354                                     &rect);
 355             color = get_colorpixel("FFFFFF");
 356             xcb_change_gc(xcb_connection,
 357                           outputs_walk->bargc,
 358                           XCB_GC_FOREGROUND,
 359                           &color);
 360             xcb_image_text_8(xcb_connection,
 361                              strlen(ws_walk->name),
 362                              outputs_walk->bar,
 363                              outputs_walk->bargc,
 364                              i + 5, font_height + 1,
 365                              ws_walk->name);
 366             i += 10 + ws_walk->name_width;
 367         }
 368
 369         i = 0;
 370     }
 371     xcb_flush(xcb_connection);
 372 }