2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2014 Michael Stapelberg and contributors (see also: LICENSE)
7 * bindings.c: Functions for configuring, finding and, running bindings.
11 pid_t command_error_nagbar_pid = -1;
14 * The name of the default mode.
17 const char *DEFAULT_BINDING_MODE = "default";
20 * Returns the mode specified by `name` or creates a new mode and adds it to
24 static struct Mode *mode_from_name(const char *name) {
27 /* Try to find the mode in the list of modes and return it */
28 SLIST_FOREACH(mode, &modes, modes) {
29 if (strcmp(mode->name, name) == 0)
33 /* If the mode was not found, create a new one */
34 mode = scalloc(sizeof(struct Mode));
35 mode->name = sstrdup(name);
36 mode->bindings = scalloc(sizeof(struct bindings_head));
37 TAILQ_INIT(mode->bindings);
38 SLIST_INSERT_HEAD(&modes, mode, modes);
44 * Adds a binding from config parameters given as strings and returns a
45 * pointer to the binding structure. Returns NULL if the input code could not
49 Binding *configure_binding(const char *bindtype, const char *modifiers, const char *input_code,
50 const char *release, const char *command, const char *modename) {
51 Binding *new_binding = scalloc(sizeof(Binding));
52 DLOG("bindtype %s, modifiers %s, input code %s, release %s\n", bindtype, modifiers, input_code, release);
53 new_binding->release = (release != NULL ? B_UPON_KEYRELEASE : B_UPON_KEYPRESS);
54 if (strcmp(bindtype, "bindsym") == 0) {
55 new_binding->input_type = (strncasecmp(input_code, "button", (sizeof("button") - 1)) == 0
59 new_binding->symbol = sstrdup(input_code);
61 // TODO: strtol with proper error handling
62 new_binding->keycode = atoi(input_code);
63 new_binding->input_type = B_KEYBOARD;
64 if (new_binding->keycode == 0) {
65 ELOG("Could not parse \"%s\" as an input code, ignoring this binding.\n", input_code);
70 new_binding->mods = modifiers_from_str(modifiers);
71 new_binding->command = sstrdup(command);
73 struct Mode *mode = mode_from_name(modename);
74 TAILQ_INSERT_TAIL(mode->bindings, new_binding, bindings);
79 static void grab_keycode_for_binding(xcb_connection_t *conn, Binding *bind, uint32_t keycode) {
80 if (bind->input_type != B_KEYBOARD)
83 DLOG("Grabbing %d with modifiers %d (with mod_mask_lock %d)\n", keycode, bind->mods, bind->mods | XCB_MOD_MASK_LOCK);
84 /* Grab the key in all combinations */
85 #define GRAB_KEY(modifier) \
87 xcb_grab_key(conn, 0, root, modifier, keycode, \
88 XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC); \
90 int mods = bind->mods;
91 if ((bind->mods & BIND_MODE_SWITCH) != 0) {
92 mods &= ~BIND_MODE_SWITCH;
94 mods = XCB_MOD_MASK_ANY;
97 GRAB_KEY(mods | xcb_numlock_mask);
98 GRAB_KEY(mods | XCB_MOD_MASK_LOCK);
99 GRAB_KEY(mods | xcb_numlock_mask | XCB_MOD_MASK_LOCK);
104 * Grab the bound keys (tell X to send us keypress events for those keycodes)
107 void grab_all_keys(xcb_connection_t *conn, bool bind_mode_switch) {
109 TAILQ_FOREACH(bind, bindings, bindings) {
110 if (bind->input_type != B_KEYBOARD ||
111 (bind_mode_switch && (bind->mods & BIND_MODE_SWITCH) == 0) ||
112 (!bind_mode_switch && (bind->mods & BIND_MODE_SWITCH) != 0))
115 /* The easy case: the user specified a keycode directly. */
116 if (bind->keycode > 0) {
117 grab_keycode_for_binding(conn, bind, bind->keycode);
121 xcb_keycode_t *walk = bind->translated_to;
122 for (uint32_t i = 0; i < bind->number_keycodes; i++)
123 grab_keycode_for_binding(conn, bind, *walk++);
128 * Returns a pointer to the Binding with the specified modifiers and
129 * keycode or NULL if no such binding exists.
132 static Binding *get_binding(uint16_t modifiers, bool is_release, uint16_t input_code, input_type_t input_type) {
136 /* On a press event, we first reset all B_UPON_KEYRELEASE_IGNORE_MODS
137 * bindings back to B_UPON_KEYRELEASE */
138 TAILQ_FOREACH(bind, bindings, bindings) {
139 if (bind->input_type != input_type)
141 if (bind->release == B_UPON_KEYRELEASE_IGNORE_MODS)
142 bind->release = B_UPON_KEYRELEASE;
146 TAILQ_FOREACH(bind, bindings, bindings) {
147 /* First compare the modifiers (unless this is a
148 * B_UPON_KEYRELEASE_IGNORE_MODS binding and this is a KeyRelease
150 if (bind->input_type != input_type)
152 if (bind->mods != modifiers &&
153 (bind->release != B_UPON_KEYRELEASE_IGNORE_MODS ||
157 /* For keyboard bindings where a symbol was specified by the user, we
158 * need to look in the array of translated keycodes for the event’s
160 if (input_type == B_KEYBOARD && bind->symbol != NULL) {
161 if (memmem(bind->translated_to,
162 bind->number_keycodes * sizeof(xcb_keycode_t),
163 &input_code, sizeof(xcb_keycode_t)) == NULL)
166 /* This case is easier: The user specified a keycode */
167 if (bind->keycode != input_code)
171 /* If this binding is a release binding, it matches the key which the
172 * user pressed. We therefore mark it as B_UPON_KEYRELEASE_IGNORE_MODS
173 * for later, so that the user can release the modifiers before the
174 * actual key or button and the release event will still be matched. */
175 if (bind->release == B_UPON_KEYRELEASE && !is_release)
176 bind->release = B_UPON_KEYRELEASE_IGNORE_MODS;
178 /* Check if the binding is for a press or a release event */
179 if ((bind->release == B_UPON_KEYPRESS && is_release) ||
180 (bind->release >= B_UPON_KEYRELEASE && !is_release))
186 return (bind == TAILQ_END(bindings) ? NULL : bind);
190 * Returns a pointer to the Binding that matches the given xcb button or key
191 * event or NULL if no such binding exists.
194 Binding *get_binding_from_xcb_event(xcb_generic_event_t *event) {
195 bool is_release = (event->response_type == XCB_KEY_RELEASE
196 || event->response_type == XCB_BUTTON_RELEASE);
198 input_type_t input_type = ((event->response_type == XCB_BUTTON_RELEASE
199 || event->response_type == XCB_BUTTON_PRESS)
203 uint16_t event_state = ((xcb_key_press_event_t *)event)->state;
204 uint16_t event_detail = ((xcb_key_press_event_t *)event)->detail;
206 /* Remove the numlock bit, all other bits are modifiers we can bind to */
207 uint16_t state_filtered = event_state & ~(xcb_numlock_mask | XCB_MOD_MASK_LOCK);
208 DLOG("(removed numlock, state = %d)\n", state_filtered);
209 /* Only use the lower 8 bits of the state (modifier masks) so that mouse
210 * button masks are filtered out */
211 state_filtered &= 0xFF;
212 DLOG("(removed upper 8 bits, state = %d)\n", state_filtered);
214 if (xkb_current_group == XkbGroup2Index)
215 state_filtered |= BIND_MODE_SWITCH;
217 DLOG("(checked mode_switch, state %d)\n", state_filtered);
219 /* Find the binding */
220 Binding *bind = get_binding(state_filtered, is_release, event_detail, input_type);
222 /* No match? Then the user has Mode_switch enabled but does not have a
223 * specific keybinding. Fall back to the default keybindings (without
224 * Mode_switch). Makes it much more convenient for users of a hybrid
225 * layout (like ru). */
227 state_filtered &= ~(BIND_MODE_SWITCH);
228 DLOG("no match, new state_filtered = %d\n", state_filtered);
229 if ((bind = get_binding(state_filtered, is_release, event_detail, input_type)) == NULL) {
230 /* This is not a real error since we can have release and
231 * non-release bindings. On a press event for which there is only a
232 * !release-binding, but no release-binding, the corresponding
233 * release event will trigger this. No problem, though. */
234 DLOG("Could not lookup key binding (modifiers %d, keycode %d)\n",
235 state_filtered, event_detail);
243 * Translates keysymbols to keycodes for all bindings which use keysyms.
246 void translate_keysyms(void) {
250 xcb_keycode_t i, min_keycode, max_keycode;
252 min_keycode = xcb_get_setup(conn)->min_keycode;
253 max_keycode = xcb_get_setup(conn)->max_keycode;
255 TAILQ_FOREACH(bind, bindings, bindings) {
256 if (bind->input_type == B_MOUSE) {
257 int button = atoi(bind->symbol + (sizeof("button") - 1));
258 bind->keycode = button;
261 ELOG("Could not translate string to button: \"%s\"\n", bind->symbol);
266 if (bind->keycode > 0)
269 /* We need to translate the symbol to a keycode */
270 keysym = XStringToKeysym(bind->symbol);
271 if (keysym == NoSymbol) {
272 ELOG("Could not translate string to key symbol: \"%s\"\n",
277 /* Base column we use for looking up key symbols. We always consider
278 * the base column and the corresponding shift column, so without
279 * mode_switch, we look in 0 and 1, with mode_switch we look in 2 and
281 col = (bind->mods & BIND_MODE_SWITCH ? 2 : 0);
283 FREE(bind->translated_to);
284 bind->number_keycodes = 0;
286 for (i = min_keycode; i && i <= max_keycode; i++) {
287 if ((xcb_key_symbols_get_keysym(keysyms, i, col) != keysym) &&
288 (xcb_key_symbols_get_keysym(keysyms, i, col+1) != keysym))
290 bind->number_keycodes++;
291 bind->translated_to = srealloc(bind->translated_to,
292 (sizeof(xcb_keycode_t) *
293 bind->number_keycodes));
294 bind->translated_to[bind->number_keycodes-1] = i;
297 DLOG("Translated symbol \"%s\" to %d keycode\n", bind->symbol,
298 bind->number_keycodes);
303 * Switches the key bindings to the given mode, if the mode exists
306 void switch_mode(const char *new_mode) {
309 DLOG("Switching to mode %s\n", new_mode);
311 SLIST_FOREACH(mode, &modes, modes) {
312 if (strcasecmp(mode->name, new_mode) != 0)
315 ungrab_all_keys(conn);
316 bindings = mode->bindings;
318 grab_all_keys(conn, false);
321 sasprintf(&event_msg, "{\"change\":\"%s\"}", mode->name);
323 ipc_send_event("mode", I3_IPC_EVENT_MODE, event_msg);
329 ELOG("ERROR: Mode not found\n");
333 * Checks for duplicate key bindings (the same keycode or keysym is configured
334 * more than once). If a duplicate binding is found, a message is printed to
335 * stderr and the has_errors variable is set to true, which will start
339 void check_for_duplicate_bindings(struct context *context) {
340 Binding *bind, *current;
341 TAILQ_FOREACH(current, bindings, bindings) {
342 TAILQ_FOREACH(bind, bindings, bindings) {
343 /* Abort when we reach the current keybinding, only check the
348 /* Check if the input types are different */
349 if (bind->input_type != current->input_type)
352 /* Check if one is using keysym while the other is using bindsym.
354 /* XXX: It should be checked at a later place (when translating the
355 * keysym to keycodes) if there are any duplicates */
356 if ((bind->symbol == NULL && current->symbol != NULL) ||
357 (bind->symbol != NULL && current->symbol == NULL))
360 /* If bind is NULL, current has to be NULL, too (see above).
361 * If the keycodes differ, it can't be a duplicate. */
362 if (bind->symbol != NULL &&
363 strcasecmp(bind->symbol, current->symbol) != 0)
366 /* Check if the keycodes or modifiers are different. If so, they
367 * can't be duplicate */
368 if (bind->keycode != current->keycode ||
369 bind->mods != current->mods ||
370 bind->release != current->release)
373 context->has_errors = true;
374 if (current->keycode != 0) {
375 ELOG("Duplicate keybinding in config file:\n modmask %d with keycode %d, command \"%s\"\n",
376 current->mods, current->keycode, current->command);
378 ELOG("Duplicate keybinding in config file:\n modmask %d with keysym %s, command \"%s\"\n",
379 current->mods, current->symbol, current->command);
386 * Runs the given binding and handles parse errors. Returns a CommandResult for
387 * running the binding's command. Caller should render tree if
388 * needs_tree_render is true. Free with command_result_free().
391 CommandResult *run_binding(Binding *bind) {
392 /* We need to copy the command since “reload” may be part of the command,
393 * and then the memory that bind->command points to may not contain the
394 * same data anymore. */
395 char *command_copy = sstrdup(bind->command);
396 CommandResult *result = parse_command(command_copy, NULL);
399 if (result->needs_tree_render)
402 if (result->parse_error) {
404 sasprintf(&pageraction, "i3-sensible-pager \"%s\"\n", errorfilename);
406 NULL, /* will be replaced by the executable path */
412 "The configured command for this shortcut could not be run successfully.",
418 start_nagbar(&command_error_nagbar_pid, argv);
422 /* TODO: emit event for running a binding */