git.sur5r.net Git - i3/i3/blob - src/config.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  * src/config.c: Contains all functions handling the configuration file (calling
  11  * the parser (src/cfgparse.y) with the correct path, switching key bindings
  12  * mode).
  13  *
  14  */
  15 #include <stdio.h>
  16 #include <string.h>
  17 #include <sys/stat.h>
  18 #include <stdlib.h>
  19 #include <glob.h>
  20
  21 /* We need Xlib for XStringToKeysym */
  22 #include <X11/Xlib.h>
  23
  24 #include <xcb/xcb_keysyms.h>
  25
  26 #include "i3.h"
  27 #include "util.h"
  28 #include "config.h"
  29 #include "xcb.h"
  30 #include "table.h"
  31 #include "workspace.h"
  32 #include "log.h"
  33
  34 Config config;
  35 struct modes_head modes;
  36
  37 /*
  38  * This function resolves ~ in pathnames.
  39  *
  40  */
  41 static char *glob_path(const char *path) {
  42         static glob_t globbuf;
  43         if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
  44                 die("glob() failed");
  45         char *result = sstrdup(globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path);
  46         globfree(&globbuf);
  47         return result;
  48 }
  49
  50 /**
  51  * Ungrabs all keys, to be called before re-grabbing the keys because of a
  52  * mapping_notify event or a configuration file reload
  53  *
  54  */
  55 void ungrab_all_keys(xcb_connection_t *conn) {
  56         DLOG("Ungrabbing all keys\n");
  57         xcb_ungrab_key(conn, XCB_GRAB_ANY, root, XCB_BUTTON_MASK_ANY);
  58 }
  59
  60 static void grab_keycode_for_binding(xcb_connection_t *conn, Binding *bind, uint32_t keycode) {
  61         DLOG("Grabbing %d\n", keycode);
  62         if ((bind->mods & BIND_MODE_SWITCH) != 0)
  63                 xcb_grab_key(conn, 0, root, 0, keycode,
  64                         XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_SYNC);
  65         else {
  66                 /* Grab the key in all combinations */
  67                 #define GRAB_KEY(modifier) xcb_grab_key(conn, 0, root, modifier, keycode, \
  68                                                         XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC)
  69                 GRAB_KEY(bind->mods);
  70                 GRAB_KEY(bind->mods | xcb_numlock_mask);
  71                 GRAB_KEY(bind->mods | xcb_numlock_mask | XCB_MOD_MASK_LOCK);
  72         }
  73 }
  74
  75 /*
  76  * Grab the bound keys (tell X to send us keypress events for those keycodes)
  77  *
  78  */
  79 void grab_all_keys(xcb_connection_t *conn) {
  80         Binding *bind;
  81         TAILQ_FOREACH(bind, bindings, bindings) {
  82                 /* The easy case: the user specified a keycode directly. */
  83                 if (bind->keycode > 0) {
  84                         grab_keycode_for_binding(conn, bind, bind->keycode);
  85                         continue;
  86                 }
  87
  88                 /* We need to translate the symbol to a keycode */
  89                 xcb_keysym_t keysym = XStringToKeysym(bind->symbol);
  90                 if (keysym == NoSymbol) {
  91                         ELOG("Could not translate string to key symbol: \"%s\"\n", bind->symbol);
  92                         continue;
  93                 }
  94
  95 #ifdef OLD_XCB_KEYSYMS_API
  96                 bind->number_keycodes = 1;
  97                 xcb_keycode_t code = xcb_key_symbols_get_keycode(keysyms, keysym);
  98                 DLOG("Translated symbol \"%s\" to 1 keycode (%d)\n", bind->symbol, code);
  99                 grab_keycode_for_binding(conn, bind, code);
 100                 bind->translated_to = smalloc(sizeof(xcb_keycode_t));
 101                 memcpy(bind->translated_to, &code, sizeof(xcb_keycode_t));
 102 #else
 103                 uint32_t last_keycode = 0;
 104                 xcb_keycode_t *keycodes = xcb_key_symbols_get_keycode(keysyms, keysym);
 105                 if (keycodes == NULL) {
 106                         DLOG("Could not translate symbol \"%s\"\n", bind->symbol);
 107                         continue;
 108                 }
 109
 110                 bind->number_keycodes = 0;
 111
 112                 for (xcb_keycode_t *walk = keycodes; *walk != 0; walk++) {
 113                         /* We hope duplicate keycodes will be returned in order
 114                          * and skip them */
 115                         if (last_keycode == *walk)
 116                                 continue;
 117                         grab_keycode_for_binding(conn, bind, *walk);
 118                         last_keycode = *walk;
 119                         bind->number_keycodes++;
 120                 }
 121                 DLOG("Translated symbol \"%s\" to %d keycode\n", bind->symbol, bind->number_keycodes);
 122                 bind->translated_to = smalloc(bind->number_keycodes * sizeof(xcb_keycode_t));
 123                 memcpy(bind->translated_to, keycodes, bind->number_keycodes * sizeof(xcb_keycode_t));
 124                 free(keycodes);
 125 #endif
 126         }
 127 }
 128
 129 /*
 130  * Switches the key bindings to the given mode, if the mode exists
 131  *
 132  */
 133 void switch_mode(xcb_connection_t *conn, const char *new_mode) {
 134         struct Mode *mode;
 135
 136         LOG("Switching to mode %s\n", new_mode);
 137
 138         SLIST_FOREACH(mode, &modes, modes) {
 139                 if (strcasecmp(mode->name, new_mode) != 0)
 140                         continue;
 141
 142                 ungrab_all_keys(conn);
 143                 bindings = mode->bindings;
 144                 grab_all_keys(conn);
 145                 return;
 146         }
 147
 148         ELOG("ERROR: Mode not found\n");
 149 }
 150
 151 /*
 152  * Finds the configuration file to use (either the one specified by
 153  * override_configpath), the user’s one or the system default) and calls
 154  * parse_file().
 155  *
 156  */
 157 static void parse_configuration(const char *override_configpath) {
 158         if (override_configpath != NULL) {
 159                 parse_file(override_configpath);
 160                 return;
 161         }
 162
 163         FILE *handle;
 164         char *globbed = glob_path("~/.i3/config");
 165         if ((handle = fopen(globbed, "r")) == NULL) {
 166                 if ((handle = fopen("/etc/i3/config", "r")) == NULL)
 167                         die("Neither \"%s\" nor /etc/i3/config could be opened\n", globbed);
 168
 169                 parse_file("/etc/i3/config");
 170                 fclose(handle);
 171                 return;
 172         }
 173
 174         parse_file(globbed);
 175         fclose(handle);
 176 }
 177
 178 /*
 179  * (Re-)loads the configuration file (sets useful defaults before).
 180  *
 181  */
 182 void load_configuration(xcb_connection_t *conn, const char *override_configpath, bool reload) {
 183         if (reload) {
 184                 /* First ungrab the keys */
 185                 ungrab_all_keys(conn);
 186
 187                 struct Mode *mode;
 188                 Binding *bind;
 189                 while (!SLIST_EMPTY(&modes)) {
 190                         mode = SLIST_FIRST(&modes);
 191                         FREE(mode->name);
 192
 193                         /* Clear the old binding list */
 194                         bindings = mode->bindings;
 195                         while (!TAILQ_EMPTY(bindings)) {
 196                                 bind = TAILQ_FIRST(bindings);
 197                                 TAILQ_REMOVE(bindings, bind, bindings);
 198                                 FREE(bind->translated_to);
 199                                 FREE(bind->command);
 200                                 FREE(bind);
 201                         }
 202                         FREE(bindings);
 203                         SLIST_REMOVE(&modes, mode, Mode, modes);
 204                 }
 205
 206                 struct Assignment *assign;
 207                 while (!TAILQ_EMPTY(&assignments)) {
 208                         assign = TAILQ_FIRST(&assignments);
 209                         FREE(assign->windowclass_title);
 210                         TAILQ_REMOVE(&assignments, assign, assignments);
 211                         FREE(assign);
 212                 }
 213         }
 214
 215         SLIST_INIT(&modes);
 216
 217         struct Mode *default_mode = scalloc(sizeof(struct Mode));
 218         default_mode->name = sstrdup("default");
 219         default_mode->bindings = scalloc(sizeof(struct bindings_head));
 220         TAILQ_INIT(default_mode->bindings);
 221         SLIST_INSERT_HEAD(&modes, default_mode, modes);
 222
 223         bindings = default_mode->bindings;
 224
 225 #define REQUIRED_OPTION(name) \
 226         if (config.name == NULL) \
 227                 die("You did not specify required configuration option " #name "\n");
 228
 229         /* Clear the old config or initialize the data structure */
 230         memset(&config, 0, sizeof(config));
 231
 232         /* Initialize default colors */
 233 #define INIT_COLOR(x, cborder, cbackground, ctext) \
 234         do { \
 235                 x.border = get_colorpixel(conn, cborder); \
 236                 x.background = get_colorpixel(conn, cbackground); \
 237                 x.text = get_colorpixel(conn, ctext); \
 238         } while (0)
 239
 240         INIT_COLOR(config.client.focused, "#4c7899", "#285577", "#ffffff");
 241         INIT_COLOR(config.client.focused_inactive, "#333333", "#5f676a", "#ffffff");
 242         INIT_COLOR(config.client.unfocused, "#333333", "#222222", "#888888");
 243         INIT_COLOR(config.client.urgent, "#2f343a", "#900000", "#ffffff");
 244         INIT_COLOR(config.bar.focused, "#4c7899", "#285577", "#ffffff");
 245         INIT_COLOR(config.bar.unfocused, "#333333", "#222222", "#888888");
 246         INIT_COLOR(config.bar.urgent, "#2f343a", "#900000", "#ffffff");
 247
 248         parse_configuration(override_configpath);
 249
 250         if (reload)
 251                 grab_all_keys(conn);
 252
 253         REQUIRED_OPTION(font);
 254
 255         /* Set an empty name for every workspace which got no name */
 256         Workspace *ws;
 257         TAILQ_FOREACH(ws, workspaces, workspaces) {
 258                 if (ws->name != NULL) {
 259                         /* If the font was not specified when the workspace name
 260                          * was loaded, we need to predict the text width now */
 261                         if (ws->text_width == 0)
 262                                 ws->text_width = predict_text_width(global_conn,
 263                                                 config.font, ws->name, ws->name_len);
 264                         continue;
 265                 }
 266
 267                 workspace_set_name(ws, NULL);
 268         }
 269 }