i3
|
00001 /* 00002 * vim:ts=8:expandtab 00003 * 00004 * i3 - an improved dynamic tiling window manager 00005 * 00006 * © 2009-2010 Michael Stapelberg and contributors 00007 * 00008 * See file LICENSE for license information. 00009 * 00010 * src/config.c: Contains all functions handling the configuration file (calling 00011 * the parser (src/cfgparse.y) with the correct path, switching key bindings 00012 * mode). 00013 * 00014 */ 00015 #include <stdio.h> 00016 #include <string.h> 00017 #include <sys/stat.h> 00018 #include <sys/types.h> 00019 #include <stdlib.h> 00020 #include <glob.h> 00021 #include <wordexp.h> 00022 #include <unistd.h> 00023 00024 /* We need Xlib for XStringToKeysym */ 00025 #include <X11/Xlib.h> 00026 00027 #include <xcb/xcb_keysyms.h> 00028 00029 #include "i3.h" 00030 #include "util.h" 00031 #include "config.h" 00032 #include "xcb.h" 00033 #include "table.h" 00034 #include "workspace.h" 00035 #include "log.h" 00036 00037 Config config; 00038 struct modes_head modes; 00039 00040 /* 00041 * This function resolves ~ in pathnames. 00042 * 00043 */ 00044 char *glob_path(const char *path) { 00045 static glob_t globbuf; 00046 if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0) 00047 die("glob() failed"); 00048 char *result = sstrdup(globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path); 00049 globfree(&globbuf); 00050 00051 /* If the file does not exist yet, we still may need to resolve tilde, 00052 * so call wordexp */ 00053 if (strcmp(result, path) == 0) { 00054 wordexp_t we; 00055 wordexp(path, &we, WRDE_NOCMD); 00056 if (we.we_wordc > 0) { 00057 free(result); 00058 result = sstrdup(we.we_wordv[0]); 00059 } 00060 wordfree(&we); 00061 } 00062 00063 return result; 00064 } 00065 00066 /* 00067 * Checks if the given path exists by calling stat(). 00068 * 00069 */ 00070 bool path_exists(const char *path) { 00071 struct stat buf; 00072 return (stat(path, &buf) == 0); 00073 } 00074 00080 void ungrab_all_keys(xcb_connection_t *conn) { 00081 DLOG("Ungrabbing all keys\n"); 00082 xcb_ungrab_key(conn, XCB_GRAB_ANY, root, XCB_BUTTON_MASK_ANY); 00083 } 00084 00085 static void grab_keycode_for_binding(xcb_connection_t *conn, Binding *bind, uint32_t keycode) { 00086 DLOG("Grabbing %d\n", keycode); 00087 /* Grab the key in all combinations */ 00088 #define GRAB_KEY(modifier) \ 00089 do { \ 00090 xcb_grab_key(conn, 0, root, modifier, keycode, \ 00091 XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC); \ 00092 } while (0) 00093 int mods = bind->mods; 00094 if ((bind->mods & BIND_MODE_SWITCH) != 0) { 00095 mods &= ~BIND_MODE_SWITCH; 00096 if (mods == 0) 00097 mods = XCB_MOD_MASK_ANY; 00098 } 00099 GRAB_KEY(mods); 00100 GRAB_KEY(mods | xcb_numlock_mask); 00101 GRAB_KEY(mods | xcb_numlock_mask | XCB_MOD_MASK_LOCK); 00102 } 00103 00104 /* 00105 * Returns a pointer to the Binding with the specified modifiers and keycode 00106 * or NULL if no such binding exists. 00107 * 00108 */ 00109 Binding *get_binding(uint16_t modifiers, xcb_keycode_t keycode) { 00110 Binding *bind; 00111 00112 TAILQ_FOREACH(bind, bindings, bindings) { 00113 /* First compare the modifiers */ 00114 if (bind->mods != modifiers) 00115 continue; 00116 00117 /* If a symbol was specified by the user, we need to look in 00118 * the array of translated keycodes for the event’s keycode */ 00119 if (bind->symbol != NULL) { 00120 if (memmem(bind->translated_to, 00121 bind->number_keycodes * sizeof(xcb_keycode_t), 00122 &keycode, sizeof(xcb_keycode_t)) != NULL) 00123 break; 00124 } else { 00125 /* This case is easier: The user specified a keycode */ 00126 if (bind->keycode == keycode) 00127 break; 00128 } 00129 } 00130 00131 return (bind == TAILQ_END(bindings) ? NULL : bind); 00132 } 00133 00134 /* 00135 * Translates keysymbols to keycodes for all bindings which use keysyms. 00136 * 00137 */ 00138 void translate_keysyms() { 00139 Binding *bind; 00140 TAILQ_FOREACH(bind, bindings, bindings) { 00141 if (bind->keycode > 0) 00142 continue; 00143 00144 /* We need to translate the symbol to a keycode */ 00145 xcb_keysym_t keysym = XStringToKeysym(bind->symbol); 00146 if (keysym == NoSymbol) { 00147 ELOG("Could not translate string to key symbol: \"%s\"\n", bind->symbol); 00148 continue; 00149 } 00150 00151 #ifdef OLD_XCB_KEYSYMS_API 00152 bind->number_keycodes = 1; 00153 xcb_keycode_t code = xcb_key_symbols_get_keycode(keysyms, keysym); 00154 DLOG("Translated symbol \"%s\" to 1 keycode (%d)\n", bind->symbol, code); 00155 grab_keycode_for_binding(global_conn, bind, code); 00156 bind->translated_to = smalloc(sizeof(xcb_keycode_t)); 00157 memcpy(bind->translated_to, &code, sizeof(xcb_keycode_t)); 00158 #else 00159 uint32_t last_keycode = 0; 00160 xcb_keycode_t *keycodes = xcb_key_symbols_get_keycode(keysyms, keysym); 00161 if (keycodes == NULL) { 00162 DLOG("Could not translate symbol \"%s\"\n", bind->symbol); 00163 continue; 00164 } 00165 00166 bind->number_keycodes = 0; 00167 00168 for (xcb_keycode_t *walk = keycodes; *walk != 0; walk++) { 00169 /* We hope duplicate keycodes will be returned in order 00170 * and skip them */ 00171 if (last_keycode == *walk) 00172 continue; 00173 last_keycode = *walk; 00174 bind->number_keycodes++; 00175 } 00176 DLOG("Translated symbol \"%s\" to %d keycode\n", bind->symbol, bind->number_keycodes); 00177 bind->translated_to = smalloc(bind->number_keycodes * sizeof(xcb_keycode_t)); 00178 memcpy(bind->translated_to, keycodes, bind->number_keycodes * sizeof(xcb_keycode_t)); 00179 free(keycodes); 00180 #endif 00181 } 00182 } 00183 00184 /* 00185 * Grab the bound keys (tell X to send us keypress events for those keycodes) 00186 * 00187 */ 00188 void grab_all_keys(xcb_connection_t *conn, bool bind_mode_switch) { 00189 Binding *bind; 00190 TAILQ_FOREACH(bind, bindings, bindings) { 00191 if ((bind_mode_switch && (bind->mods & BIND_MODE_SWITCH) == 0) || 00192 (!bind_mode_switch && (bind->mods & BIND_MODE_SWITCH) != 0)) 00193 continue; 00194 00195 /* The easy case: the user specified a keycode directly. */ 00196 if (bind->keycode > 0) { 00197 grab_keycode_for_binding(conn, bind, bind->keycode); 00198 continue; 00199 } 00200 00201 xcb_keycode_t *walk = bind->translated_to; 00202 for (int i = 0; i < bind->number_keycodes; i++) 00203 grab_keycode_for_binding(conn, bind, *walk); 00204 } 00205 } 00206 00207 /* 00208 * Switches the key bindings to the given mode, if the mode exists 00209 * 00210 */ 00211 void switch_mode(xcb_connection_t *conn, const char *new_mode) { 00212 struct Mode *mode; 00213 00214 LOG("Switching to mode %s\n", new_mode); 00215 00216 SLIST_FOREACH(mode, &modes, modes) { 00217 if (strcasecmp(mode->name, new_mode) != 0) 00218 continue; 00219 00220 ungrab_all_keys(conn); 00221 bindings = mode->bindings; 00222 translate_keysyms(); 00223 grab_all_keys(conn, false); 00224 return; 00225 } 00226 00227 ELOG("ERROR: Mode not found\n"); 00228 } 00229 00230 /* 00231 * Get the path of the first configuration file found. Checks the XDG folders 00232 * first ($XDG_CONFIG_HOME, $XDG_CONFIG_DIRS), then the traditional paths. 00233 * 00234 */ 00235 static char *get_config_path() { 00236 /* 1: check for $XDG_CONFIG_HOME/i3/config */ 00237 char *xdg_config_home, *xdg_config_dirs, *config_path; 00238 00239 if ((xdg_config_home = getenv("XDG_CONFIG_HOME")) == NULL) 00240 xdg_config_home = "~/.config"; 00241 00242 xdg_config_home = glob_path(xdg_config_home); 00243 if (asprintf(&config_path, "%s/i3/config", xdg_config_home) == -1) 00244 die("asprintf() failed"); 00245 free(xdg_config_home); 00246 00247 if (path_exists(config_path)) 00248 return config_path; 00249 free(config_path); 00250 00251 /* 2: check for $XDG_CONFIG_DIRS/i3/config */ 00252 if ((xdg_config_dirs = getenv("XDG_CONFIG_DIRS")) == NULL) 00253 xdg_config_dirs = "/etc/xdg"; 00254 00255 char *buf = sstrdup(xdg_config_dirs); 00256 char *tok = strtok(buf, ":"); 00257 while (tok != NULL) { 00258 tok = glob_path(tok); 00259 if (asprintf(&config_path, "%s/i3/config", tok) == -1) 00260 die("asprintf() failed"); 00261 free(tok); 00262 if (path_exists(config_path)) { 00263 free(buf); 00264 return config_path; 00265 } 00266 free(config_path); 00267 tok = strtok(NULL, ":"); 00268 } 00269 free(buf); 00270 00271 /* 3: check traditional paths */ 00272 config_path = glob_path("~/.i3/config"); 00273 if (path_exists(config_path)) 00274 return config_path; 00275 00276 config_path = sstrdup("/etc/i3/config"); 00277 if (!path_exists(config_path)) 00278 die("Neither $XDG_CONFIG_HOME/i3/config, nor " 00279 "$XDG_CONFIG_DIRS/i3/config, nor ~/.i3/config nor " 00280 "/etc/i3/config exist."); 00281 00282 return config_path; 00283 } 00284 00285 /* 00286 * Finds the configuration file to use (either the one specified by 00287 * override_configpath), the user’s one or the system default) and calls 00288 * parse_file(). 00289 * 00290 */ 00291 static void parse_configuration(const char *override_configpath) { 00292 if (override_configpath != NULL) { 00293 parse_file(override_configpath); 00294 return; 00295 } 00296 00297 char *path = get_config_path(); 00298 DLOG("Parsing configfile %s\n", path); 00299 parse_file(path); 00300 free(path); 00301 } 00302 00303 /* 00304 * (Re-)loads the configuration file (sets useful defaults before). 00305 * 00306 */ 00307 void load_configuration(xcb_connection_t *conn, const char *override_configpath, bool reload) { 00308 if (reload) { 00309 /* First ungrab the keys */ 00310 ungrab_all_keys(conn); 00311 00312 struct Mode *mode; 00313 Binding *bind; 00314 while (!SLIST_EMPTY(&modes)) { 00315 mode = SLIST_FIRST(&modes); 00316 FREE(mode->name); 00317 00318 /* Clear the old binding list */ 00319 bindings = mode->bindings; 00320 while (!TAILQ_EMPTY(bindings)) { 00321 bind = TAILQ_FIRST(bindings); 00322 TAILQ_REMOVE(bindings, bind, bindings); 00323 FREE(bind->translated_to); 00324 FREE(bind->command); 00325 FREE(bind); 00326 } 00327 FREE(bindings); 00328 SLIST_REMOVE(&modes, mode, Mode, modes); 00329 } 00330 00331 struct Assignment *assign; 00332 while (!TAILQ_EMPTY(&assignments)) { 00333 assign = TAILQ_FIRST(&assignments); 00334 FREE(assign->windowclass_title); 00335 TAILQ_REMOVE(&assignments, assign, assignments); 00336 FREE(assign); 00337 } 00338 00339 /* Clear workspace names */ 00340 Workspace *ws; 00341 TAILQ_FOREACH(ws, workspaces, workspaces) 00342 workspace_set_name(ws, NULL); 00343 } 00344 00345 SLIST_INIT(&modes); 00346 00347 struct Mode *default_mode = scalloc(sizeof(struct Mode)); 00348 default_mode->name = sstrdup("default"); 00349 default_mode->bindings = scalloc(sizeof(struct bindings_head)); 00350 TAILQ_INIT(default_mode->bindings); 00351 SLIST_INSERT_HEAD(&modes, default_mode, modes); 00352 00353 bindings = default_mode->bindings; 00354 00355 #define REQUIRED_OPTION(name) \ 00356 if (config.name == NULL) \ 00357 die("You did not specify required configuration option " #name "\n"); 00358 00359 /* Clear the old config or initialize the data structure */ 00360 memset(&config, 0, sizeof(config)); 00361 00362 /* Initialize default colors */ 00363 #define INIT_COLOR(x, cborder, cbackground, ctext) \ 00364 do { \ 00365 x.border = get_colorpixel(conn, cborder); \ 00366 x.background = get_colorpixel(conn, cbackground); \ 00367 x.text = get_colorpixel(conn, ctext); \ 00368 } while (0) 00369 00370 config.client.background = get_colorpixel(conn, "#000000"); 00371 INIT_COLOR(config.client.focused, "#4c7899", "#285577", "#ffffff"); 00372 INIT_COLOR(config.client.focused_inactive, "#333333", "#5f676a", "#ffffff"); 00373 INIT_COLOR(config.client.unfocused, "#333333", "#222222", "#888888"); 00374 INIT_COLOR(config.client.urgent, "#2f343a", "#900000", "#ffffff"); 00375 INIT_COLOR(config.bar.focused, "#4c7899", "#285577", "#ffffff"); 00376 INIT_COLOR(config.bar.unfocused, "#333333", "#222222", "#888888"); 00377 INIT_COLOR(config.bar.urgent, "#2f343a", "#900000", "#ffffff"); 00378 00379 parse_configuration(override_configpath); 00380 00381 if (reload) { 00382 translate_keysyms(); 00383 grab_all_keys(conn, false); 00384 } 00385 00386 REQUIRED_OPTION(font); 00387 00388 /* Set an empty name for every workspace which got no name */ 00389 Workspace *ws; 00390 TAILQ_FOREACH(ws, workspaces, workspaces) { 00391 if (ws->name != NULL) { 00392 /* If the font was not specified when the workspace name 00393 * was loaded, we need to predict the text width now */ 00394 if (ws->text_width == 0) 00395 ws->text_width = predict_text_width(global_conn, 00396 config.font, ws->name, ws->name_len); 00397 continue; 00398 } 00399 00400 workspace_set_name(ws, NULL); 00401 } 00402 }