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