i3
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00001 /* 00002 * vim:ts=4:sw=4: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 00016 /* We need Xlib for XStringToKeysym */ 00017 #include <X11/Xlib.h> 00018 00019 #include "all.h" 00020 00021 char *current_configpath = NULL; 00022 Config config; 00023 struct modes_head modes; 00024 00030 void ungrab_all_keys(xcb_connection_t *conn) { 00031 DLOG("Ungrabbing all keys\n"); 00032 xcb_ungrab_key(conn, XCB_GRAB_ANY, root, XCB_BUTTON_MASK_ANY); 00033 } 00034 00035 static void grab_keycode_for_binding(xcb_connection_t *conn, Binding *bind, uint32_t keycode) { 00036 DLOG("Grabbing %d\n", keycode); 00037 /* Grab the key in all combinations */ 00038 #define GRAB_KEY(modifier) \ 00039 do { \ 00040 xcb_grab_key(conn, 0, root, modifier, keycode, \ 00041 XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC); \ 00042 } while (0) 00043 int mods = bind->mods; 00044 if ((bind->mods & BIND_MODE_SWITCH) != 0) { 00045 mods &= ~BIND_MODE_SWITCH; 00046 if (mods == 0) 00047 mods = XCB_MOD_MASK_ANY; 00048 } 00049 GRAB_KEY(mods); 00050 GRAB_KEY(mods | xcb_numlock_mask); 00051 GRAB_KEY(mods | xcb_numlock_mask | XCB_MOD_MASK_LOCK); 00052 } 00053 00054 /* 00055 * Returns a pointer to the Binding with the specified modifiers and keycode 00056 * or NULL if no such binding exists. 00057 * 00058 */ 00059 Binding *get_binding(uint16_t modifiers, xcb_keycode_t keycode) { 00060 Binding *bind; 00061 00062 TAILQ_FOREACH(bind, bindings, bindings) { 00063 /* First compare the modifiers */ 00064 if (bind->mods != modifiers) 00065 continue; 00066 00067 /* If a symbol was specified by the user, we need to look in 00068 * the array of translated keycodes for the event’s keycode */ 00069 if (bind->symbol != NULL) { 00070 if (memmem(bind->translated_to, 00071 bind->number_keycodes * sizeof(xcb_keycode_t), 00072 &keycode, sizeof(xcb_keycode_t)) != NULL) 00073 break; 00074 } else { 00075 /* This case is easier: The user specified a keycode */ 00076 if (bind->keycode == keycode) 00077 break; 00078 } 00079 } 00080 00081 return (bind == TAILQ_END(bindings) ? NULL : bind); 00082 } 00083 00084 /* 00085 * Translates keysymbols to keycodes for all bindings which use keysyms. 00086 * 00087 */ 00088 void translate_keysyms() { 00089 Binding *bind; 00090 TAILQ_FOREACH(bind, bindings, bindings) { 00091 if (bind->keycode > 0) 00092 continue; 00093 00094 /* We need to translate the symbol to a keycode */ 00095 xcb_keysym_t keysym = XStringToKeysym(bind->symbol); 00096 if (keysym == NoSymbol) { 00097 ELOG("Could not translate string to key symbol: \"%s\"\n", bind->symbol); 00098 continue; 00099 } 00100 00101 uint32_t last_keycode = 0; 00102 xcb_keycode_t *keycodes = xcb_key_symbols_get_keycode(keysyms, keysym); 00103 if (keycodes == NULL) { 00104 DLOG("Could not translate symbol \"%s\"\n", bind->symbol); 00105 continue; 00106 } 00107 00108 bind->number_keycodes = 0; 00109 00110 for (xcb_keycode_t *walk = keycodes; *walk != 0; walk++) { 00111 /* We hope duplicate keycodes will be returned in order 00112 * and skip them */ 00113 if (last_keycode == *walk) 00114 continue; 00115 last_keycode = *walk; 00116 bind->number_keycodes++; 00117 } 00118 DLOG("Translated symbol \"%s\" to %d keycode\n", bind->symbol, bind->number_keycodes); 00119 bind->translated_to = smalloc(bind->number_keycodes * sizeof(xcb_keycode_t)); 00120 memcpy(bind->translated_to, keycodes, bind->number_keycodes * sizeof(xcb_keycode_t)); 00121 free(keycodes); 00122 } 00123 } 00124 00125 /* 00126 * Grab the bound keys (tell X to send us keypress events for those keycodes) 00127 * 00128 */ 00129 void grab_all_keys(xcb_connection_t *conn, bool bind_mode_switch) { 00130 Binding *bind; 00131 TAILQ_FOREACH(bind, bindings, bindings) { 00132 if ((bind_mode_switch && (bind->mods & BIND_MODE_SWITCH) == 0) || 00133 (!bind_mode_switch && (bind->mods & BIND_MODE_SWITCH) != 0)) 00134 continue; 00135 00136 /* The easy case: the user specified a keycode directly. */ 00137 if (bind->keycode > 0) { 00138 grab_keycode_for_binding(conn, bind, bind->keycode); 00139 continue; 00140 } 00141 00142 xcb_keycode_t *walk = bind->translated_to; 00143 for (int i = 0; i < bind->number_keycodes; i++) 00144 grab_keycode_for_binding(conn, bind, *walk); 00145 } 00146 } 00147 00148 /* 00149 * Switches the key bindings to the given mode, if the mode exists 00150 * 00151 */ 00152 void switch_mode(const char *new_mode) { 00153 struct Mode *mode; 00154 00155 LOG("Switching to mode %s\n", new_mode); 00156 00157 SLIST_FOREACH(mode, &modes, modes) { 00158 if (strcasecmp(mode->name, new_mode) != 0) 00159 continue; 00160 00161 ungrab_all_keys(conn); 00162 bindings = mode->bindings; 00163 translate_keysyms(); 00164 grab_all_keys(conn, false); 00165 return; 00166 } 00167 00168 ELOG("ERROR: Mode not found\n"); 00169 } 00170 00171 /* 00172 * Get the path of the first configuration file found. If override_configpath 00173 * is specified, that path is returned and saved for further calls. Otherwise, 00174 * checks the home directory first, then the system directory first, always 00175 * taking into account the XDG Base Directory Specification ($XDG_CONFIG_HOME, 00176 * $XDG_CONFIG_DIRS) 00177 * 00178 */ 00179 static char *get_config_path(const char *override_configpath) { 00180 char *xdg_config_home, *xdg_config_dirs, *config_path; 00181 00182 static const char *saved_configpath = NULL; 00183 00184 if (override_configpath != NULL) { 00185 saved_configpath = override_configpath; 00186 return sstrdup(saved_configpath); 00187 } 00188 00189 if (saved_configpath != NULL) 00190 return sstrdup(saved_configpath); 00191 00192 /* 1: check the traditional path under the home directory */ 00193 config_path = resolve_tilde("~/.i3/config"); 00194 if (path_exists(config_path)) 00195 return config_path; 00196 00197 /* 2: check for $XDG_CONFIG_HOME/i3/config */ 00198 if ((xdg_config_home = getenv("XDG_CONFIG_HOME")) == NULL) 00199 xdg_config_home = "~/.config"; 00200 00201 xdg_config_home = resolve_tilde(xdg_config_home); 00202 if (asprintf(&config_path, "%s/i3/config", xdg_config_home) == -1) 00203 die("asprintf() failed"); 00204 free(xdg_config_home); 00205 00206 if (path_exists(config_path)) 00207 return config_path; 00208 free(config_path); 00209 00210 /* 3: check the traditional path under /etc */ 00211 config_path = SYSCONFDIR "/i3/config"; 00212 if (path_exists(config_path)) 00213 return sstrdup(config_path); 00214 00215 /* 4: check for $XDG_CONFIG_DIRS/i3/config */ 00216 if ((xdg_config_dirs = getenv("XDG_CONFIG_DIRS")) == NULL) 00217 xdg_config_dirs = "/etc/xdg"; 00218 00219 char *buf = sstrdup(xdg_config_dirs); 00220 char *tok = strtok(buf, ":"); 00221 while (tok != NULL) { 00222 tok = resolve_tilde(tok); 00223 if (asprintf(&config_path, "%s/i3/config", tok) == -1) 00224 die("asprintf() failed"); 00225 free(tok); 00226 if (path_exists(config_path)) { 00227 free(buf); 00228 return config_path; 00229 } 00230 free(config_path); 00231 tok = strtok(NULL, ":"); 00232 } 00233 free(buf); 00234 00235 die("Unable to find the configuration file (looked at " 00236 "~/.i3/config, $XDG_CONFIG_HOME/i3/config, " 00237 SYSCONFDIR "i3/config and $XDG_CONFIG_DIRS/i3/config)"); 00238 } 00239 00240 /* 00241 * Finds the configuration file to use (either the one specified by 00242 * override_configpath), the user’s one or the system default) and calls 00243 * parse_file(). 00244 * 00245 */ 00246 static void parse_configuration(const char *override_configpath) { 00247 char *path = get_config_path(override_configpath); 00248 DLOG("Parsing configfile %s\n", path); 00249 FREE(current_configpath); 00250 current_configpath = path; 00251 parse_file(path); 00252 } 00253 00254 /* 00255 * (Re-)loads the configuration file (sets useful defaults before). 00256 * 00257 */ 00258 void load_configuration(xcb_connection_t *conn, const char *override_configpath, bool reload) { 00259 if (reload) { 00260 /* First ungrab the keys */ 00261 ungrab_all_keys(conn); 00262 00263 struct Mode *mode; 00264 Binding *bind; 00265 while (!SLIST_EMPTY(&modes)) { 00266 mode = SLIST_FIRST(&modes); 00267 FREE(mode->name); 00268 00269 /* Clear the old binding list */ 00270 bindings = mode->bindings; 00271 while (!TAILQ_EMPTY(bindings)) { 00272 bind = TAILQ_FIRST(bindings); 00273 TAILQ_REMOVE(bindings, bind, bindings); 00274 FREE(bind->translated_to); 00275 FREE(bind->command); 00276 FREE(bind); 00277 } 00278 FREE(bindings); 00279 SLIST_REMOVE(&modes, mode, Mode, modes); 00280 } 00281 00282 #if 0 00283 struct Assignment *assign; 00284 while (!TAILQ_EMPTY(&assignments)) { 00285 assign = TAILQ_FIRST(&assignments); 00286 FREE(assign->windowclass_title); 00287 TAILQ_REMOVE(&assignments, assign, assignments); 00288 FREE(assign); 00289 } 00290 #endif 00291 00292 /* Clear workspace names */ 00293 #if 0 00294 Workspace *ws; 00295 TAILQ_FOREACH(ws, workspaces, workspaces) 00296 workspace_set_name(ws, NULL); 00297 #endif 00298 } 00299 00300 SLIST_INIT(&modes); 00301 00302 struct Mode *default_mode = scalloc(sizeof(struct Mode)); 00303 default_mode->name = sstrdup("default"); 00304 default_mode->bindings = scalloc(sizeof(struct bindings_head)); 00305 TAILQ_INIT(default_mode->bindings); 00306 SLIST_INSERT_HEAD(&modes, default_mode, modes); 00307 00308 bindings = default_mode->bindings; 00309 00310 #define REQUIRED_OPTION(name) \ 00311 if (config.name == NULL) \ 00312 die("You did not specify required configuration option " #name "\n"); 00313 00314 /* Clear the old config or initialize the data structure */ 00315 memset(&config, 0, sizeof(config)); 00316 00317 /* Initialize default colors */ 00318 #define INIT_COLOR(x, cborder, cbackground, ctext) \ 00319 do { \ 00320 x.border = get_colorpixel(cborder); \ 00321 x.background = get_colorpixel(cbackground); \ 00322 x.text = get_colorpixel(ctext); \ 00323 } while (0) 00324 00325 config.client.background = get_colorpixel("#000000"); 00326 INIT_COLOR(config.client.focused, "#4c7899", "#285577", "#ffffff"); 00327 INIT_COLOR(config.client.focused_inactive, "#333333", "#5f676a", "#ffffff"); 00328 INIT_COLOR(config.client.unfocused, "#333333", "#222222", "#888888"); 00329 INIT_COLOR(config.client.urgent, "#2f343a", "#900000", "#ffffff"); 00330 INIT_COLOR(config.bar.focused, "#4c7899", "#285577", "#ffffff"); 00331 INIT_COLOR(config.bar.unfocused, "#333333", "#222222", "#888888"); 00332 INIT_COLOR(config.bar.urgent, "#2f343a", "#900000", "#ffffff"); 00333 00334 config.default_border = BS_NORMAL; 00335 /* Set default_orientation to NO_ORIENTATION for auto orientation. */ 00336 config.default_orientation = NO_ORIENTATION; 00337 00338 parse_configuration(override_configpath); 00339 00340 if (reload) { 00341 translate_keysyms(); 00342 grab_all_keys(conn, false); 00343 } 00344 00345 if (config.font.id == 0) { 00346 ELOG("You did not specify required configuration option \"font\"\n"); 00347 config.font = load_font("fixed", true); 00348 } 00349 00350 #if 0 00351 /* Set an empty name for every workspace which got no name */ 00352 Workspace *ws; 00353 TAILQ_FOREACH(ws, workspaces, workspaces) { 00354 if (ws->name != NULL) { 00355 /* If the font was not specified when the workspace name 00356 * was loaded, we need to predict the text width now */ 00357 if (ws->text_width == 0) 00358 ws->text_width = predict_text_width(global_conn, 00359 config.font, ws->name, ws->name_len); 00360 continue; 00361 } 00362 00363 workspace_set_name(ws, NULL); 00364 } 00365 #endif 00366 }