2 * Copyright 1985, 1987, 1990, 1998 The Open Group
3 * Copyright 2008 Dan Nicholson
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
19 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 * Except as contained in this notice, the names of the authors or their
23 * institutions shall not be used in advertising or otherwise to promote the
24 * sale, use or other dealings in this Software without prior written
25 * authorization from the authors.
28 /************************************************************
29 * Copyright (c) 1993 by Silicon Graphics Computer Systems, Inc.
31 * Permission to use, copy, modify, and distribute this
32 * software and its documentation for any purpose and without
33 * fee is hereby granted, provided that the above copyright
34 * notice appear in all copies and that both that copyright
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36 * documentation, and that the name of Silicon Graphics not be
37 * used in advertising or publicity pertaining to distribution
38 * of the software without specific prior written permission.
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40 * of this software for any purpose. It is provided "as is"
41 * without any express or implied warranty.
43 * SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
44 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
45 * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
46 * GRAPHICS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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48 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
49 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH
50 * THE USE OR PERFORMANCE OF THIS SOFTWARE.
52 ********************************************************/
55 * Copyright © 2009-2012 Daniel Stone
56 * Copyright © 2012 Intel Corporation
57 * Copyright © 2012 Ran Benita
59 * Permission is hereby granted, free of charge, to any person obtaining a
60 * copy of this software and associated documentation files (the "Software"),
61 * to deal in the Software without restriction, including without limitation
62 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
63 * and/or sell copies of the Software, and to permit persons to whom the
64 * Software is furnished to do so, subject to the following conditions:
66 * The above copyright notice and this permission notice (including the next
67 * paragraph) shall be included in all copies or substantial portions of the
70 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
71 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
72 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
73 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
74 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
75 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
76 * DEALINGS IN THE SOFTWARE.
78 * Author: Daniel Stone <daniel@fooishbar.org>
88 #include <xkbcommon/xkbcommon-names.h>
89 #include <xkbcommon/xkbcommon-keysyms.h>
97 * Main libxkbcommon API.
101 * @struct xkb_context
102 * Opaque top level library context object.
104 * The context contains various general library data and state, like
105 * logging level and include paths.
107 * Objects are created in a specific context, and multiple contexts may
108 * coexist simultaneously. Objects from different contexts are completely
109 * separated and do not share any memory or state.
115 * Opaque compiled keymap object.
117 * The keymap object holds all of the static keyboard information obtained
118 * from compiling XKB files.
120 * A keymap is immutable after it is created (besides reference counts, etc.);
121 * if you need to change it, you must create a new one.
127 * Opaque keyboard state object.
129 * State objects contain the active state of a keyboard (or keyboards), such
130 * as the currently effective layout and the active modifiers. It acts as a
131 * simple state machine, wherein key presses and releases are the input, and
132 * key symbols (keysyms) are the output.
137 * A number used to represent a physical key on a keyboard.
139 * A standard PC-compatible keyboard might have 102 keys. An appropriate
140 * keymap would assign each of them a keycode, by which the user should
141 * refer to the key throughout the library.
143 * Historically, the X11 protocol, and consequentially the XKB protocol,
144 * assign only 8 bits for keycodes. This limits the number of different
145 * keys that can be used simultaneously in a single keymap to 256
146 * (disregarding other limitations). This library does not share this limit;
147 * keycodes beyond 255 ('extended keycodes') are not treated specially.
148 * Keymaps and applications which are compatible with X11 should not use
151 * The values of specific keycodes are determined by the keymap and the
152 * underlying input system. For example, with an X11-compatible keymap
153 * and Linux evdev scan codes (see linux/input.h), a fixed offset is used:
155 * The keymap defines a canonical name for each key, plus possible aliases.
156 * Historically, the XKB protocol restricts these names to at most 4 (ASCII)
157 * characters, but this library does not share this limit.
160 * xkb_keycode_t keycode_A = KEY_A + 8;
163 * @sa xkb_keycode_is_legal_ext() xkb_keycode_is_legal_x11()
165 typedef uint32_t xkb_keycode_t;
168 * A number used to represent the symbols generated from a key on a keyboard.
170 * A key, represented by a keycode, may generate different symbols according
171 * to keyboard state. For example, on a QWERTY keyboard, pressing the key
172 * labled \<A\> generates the symbol 'a'. If the Shift key is held, it
173 * generates the symbol 'A'. If a different layout is used, say Greek,
174 * it generates the symbol 'α'. And so on.
176 * Each such symbol is represented by a keysym. Note that keysyms are
177 * somewhat more general, in that they can also represent some "function",
178 * such as "Left" or "Right" for the arrow keys. For more information,
180 * https://www.x.org/releases/current/doc/xproto/x11protocol.html#keysym_encoding
182 * Specifically named keysyms can be found in the
183 * xkbcommon/xkbcommon-keysyms.h header file. Their name does not include
184 * the XKB_KEY_ prefix.
186 * Besides those, any Unicode/ISO 10646 character in the range U0100 to
187 * U10FFFF can be represented by a keysym value in the range 0x01000100 to
188 * 0x0110FFFF. The name of Unicode keysyms is "U<codepoint>", e.g. "UA1B2".
190 * The name of other unnamed keysyms is the hexadecimal representation of
191 * their value, e.g. "0xabcd1234".
193 * Keysym names are case-sensitive.
195 typedef uint32_t xkb_keysym_t;
198 * Index of a keyboard layout.
200 * The layout index is a state component which detemines which <em>keyboard
201 * layout</em> is active. These may be different alphabets, different key
204 * Layout indices are consecutive. The first layout has index 0.
206 * Each layout is not required to have a name, and the names are not
207 * guaranteed to be unique (though they are usually provided and unique).
208 * Therefore, it is not safe to use the name as a unique identifier for a
209 * layout. Layout names are case-sensitive.
211 * Layouts are also called "groups" by XKB.
213 * @sa xkb_keymap_num_layouts() xkb_keymap_num_layouts_for_key()
215 typedef uint32_t xkb_layout_index_t;
216 /** A mask of layout indices. */
217 typedef uint32_t xkb_layout_mask_t;
220 * Index of a shift level.
222 * Any key, in any layout, can have several <em>shift levels</em>. Each
223 * shift level can assign different keysyms to the key. The shift level
224 * to use is chosen according to the current keyboard state; for example,
225 * if no keys are pressed, the first level may be used; if the Left Shift
226 * key is pressed, the second; if Num Lock is pressed, the third; and
227 * many such combinations are possible (see xkb_mod_index_t).
229 * Level indices are consecutive. The first level has index 0.
231 typedef uint32_t xkb_level_index_t;
234 * Index of a modifier.
236 * A @e modifier is a state component which changes the way keys are
237 * interpreted. A keymap defines a set of modifiers, such as Alt, Shift,
238 * Num Lock or Meta, and specifies which keys may @e activate which
239 * modifiers (in a many-to-many relationship, i.e. a key can activate
240 * several modifiers, and a modifier may be activated by several keys.
241 * Different keymaps do this differently).
243 * When retrieving the keysyms for a key, the active modifier set is
244 * consulted; this detemines the correct shift level to use within the
245 * currently active layout (see xkb_level_index_t).
247 * Modifier indices are consecutive. The first modifier has index 0.
249 * Each modifier must have a name, and the names are unique. Therefore, it
250 * is safe to use the name as a unique identifier for a modifier. The names
251 * of some common modifiers are provided in the xkbcommon/xkbcommon-names.h
252 * header file. Modifier names are case-sensitive.
254 * @sa xkb_keymap_num_mods()
256 typedef uint32_t xkb_mod_index_t;
257 /** A mask of modifier indices. */
258 typedef uint32_t xkb_mod_mask_t;
261 * Index of a keyboard LED.
263 * LEDs are logical objects which may be @e active or @e inactive. They
264 * typically correspond to the lights on the keyboard. Their state is
265 * determined by the current keyboard state.
267 * LED indices are non-consecutive. The first LED has index 0.
269 * Each LED must have a name, and the names are unique. Therefore,
270 * it is safe to use the name as a unique identifier for a LED. The names
271 * of some common LEDs are provided in the xkbcommon/xkbcommon-names.h
272 * header file. LED names are case-sensitive.
274 * @warning A given keymap may specify an exact index for a given LED.
275 * Therefore, LED indexing is not necessarily sequential, as opposed to
276 * modifiers and layouts. This means that when iterating over the LEDs
277 * in a keymap using e.g. xkb_keymap_num_leds(), some indices might be
278 * invalid. Given such an index, functions like xkb_keymap_led_get_name()
279 * will return NULL, and xkb_state_led_index_is_active() will return -1.
281 * LEDs are also called "indicators" by XKB.
283 * @sa xkb_keymap_num_leds()
285 typedef uint32_t xkb_led_index_t;
286 /** A mask of LED indices. */
287 typedef uint32_t xkb_led_mask_t;
289 #define XKB_KEYCODE_INVALID (0xffffffff)
290 #define XKB_LAYOUT_INVALID (0xffffffff)
291 #define XKB_LEVEL_INVALID (0xffffffff)
292 #define XKB_MOD_INVALID (0xffffffff)
293 #define XKB_LED_INVALID (0xffffffff)
295 #define XKB_KEYCODE_MAX (0xffffffff - 1)
298 * Test whether a value is a valid extended keycode.
301 #define xkb_keycode_is_legal_ext(key) (key <= XKB_KEYCODE_MAX)
304 * Test whether a value is a valid X11 keycode.
307 #define xkb_keycode_is_legal_x11(key) (key >= 8 && key <= 255)
310 * Names to compile a keymap with, also known as RMLVO.
312 * The names are the common configuration values by which a user picks
315 * If the entire struct is NULL, then each field is taken to be NULL.
316 * You should prefer passing NULL instead of choosing your own defaults.
318 struct xkb_rule_names {
320 * The rules file to use. The rules file describes how to interpret
321 * the values of the model, layout, variant and options fields.
323 * If NULL or the empty string "", a default value is used.
324 * If the XKB_DEFAULT_RULES environment variable is set, it is used
325 * as the default. Otherwise the system default is used.
329 * The keyboard model by which to interpret keycodes and LEDs.
331 * If NULL or the empty string "", a default value is used.
332 * If the XKB_DEFAULT_MODEL environment variable is set, it is used
333 * as the default. Otherwise the system default is used.
337 * A comma separated list of layouts (languages) to include in the
340 * If NULL or the empty string "", a default value is used.
341 * If the XKB_DEFAULT_LAYOUT environment variable is set, it is used
342 * as the default. Otherwise the system default is used.
346 * A comma separated list of variants, one per layout, which may
347 * modify or augment the respective layout in various ways.
349 * If NULL or the empty string "", and a default value is also used
350 * for the layout, a default value is used. Otherwise no variant is
352 * If the XKB_DEFAULT_VARIANT environment variable is set, it is used
353 * as the default. Otherwise the system default is used.
357 * A comma separated list of options, through which the user specifies
358 * non-layout related preferences, like which key combinations are used
359 * for switching layouts, or which key is the Compose key.
361 * If NULL, a default value is used. If the empty string "", no
363 * If the XKB_DEFAULT_OPTIONS environment variable is set, it is used
364 * as the default. Otherwise the system default is used.
370 * @defgroup keysyms Keysyms
371 * Utility functions related to keysyms.
377 * @page keysym-transformations Keysym Transformations
379 * Keysym translation is subject to several "keysym transformations",
380 * as described in the XKB specification. These are:
382 * - Capitalization transformation. If the Caps Lock modifier is
383 * active and was not consumed by the translation process, a single
384 * keysym is transformed to its upper-case form (if applicable).
385 * Similarly, the UTF-8/UTF-32 string produced is capitalized.
387 * This is described in:
388 * https://www.x.org/releases/current/doc/kbproto/xkbproto.html#Interpreting_the_Lock_Modifier
390 * - Control transformation. If the Control modifier is active and
391 * was not consumed by the translation process, the string produced
392 * is transformed to its matching ASCII control character (if
393 * applicable). Keysyms are not affected.
395 * This is described in:
396 * https://www.x.org/releases/current/doc/kbproto/xkbproto.html#Interpreting_the_Control_Modifier
398 * Each relevant function discusses which transformations it performs.
400 * These transformations are not applicable when a key produces multiple
406 * Get the name of a keysym.
408 * For a description of how keysyms are named, see @ref xkb_keysym_t.
410 * @param[in] keysym The keysym.
411 * @param[out] buffer A string buffer to write the name into.
412 * @param[in] size Size of the buffer.
414 * @warning If the buffer passed is too small, the string is truncated
415 * (though still NUL-terminated); a size of at least 64 bytes is recommended.
417 * @returns The number of bytes in the name, excluding the NUL byte. If
418 * the keysym is invalid, returns -1.
420 * You may check if truncation has occurred by comparing the return value
421 * with the length of buffer, similarly to the snprintf(3) function.
426 xkb_keysym_get_name(xkb_keysym_t keysym, char *buffer, size_t size);
428 /** Flags for xkb_keysym_from_name(). */
429 enum xkb_keysym_flags {
430 /** Do not apply any flags. */
431 XKB_KEYSYM_NO_FLAGS = 0,
432 /** Find keysym by case-insensitive search. */
433 XKB_KEYSYM_CASE_INSENSITIVE = (1 << 0)
437 * Get a keysym from its name.
439 * @param name The name of a keysym. See remarks in xkb_keysym_get_name();
440 * this function will accept any name returned by that function.
441 * @param flags A set of flags controlling how the search is done. If
442 * invalid flags are passed, this will fail with XKB_KEY_NoSymbol.
444 * If you use the XKB_KEYSYM_CASE_INSENSITIVE flag and two keysym names
445 * differ only by case, then the lower-case keysym is returned. For
446 * instance, for KEY_a and KEY_A, this function would return KEY_a for the
447 * case-insensitive search. If this functionality is needed, it is
448 * recommended to first call this function without this flag; and if that
449 * fails, only then to try with this flag, while possibly warning the user
450 * he had misspelled the name, and might get wrong results.
452 * Case folding is done according to the C locale; the current locale is not
455 * @returns The keysym. If the name is invalid, returns XKB_KEY_NoSymbol.
460 xkb_keysym_from_name(const char *name, enum xkb_keysym_flags flags);
463 * Get the Unicode/UTF-8 representation of a keysym.
465 * @param[in] keysym The keysym.
466 * @param[out] buffer A buffer to write the UTF-8 string into.
467 * @param[in] size The size of buffer. Must be at least 7.
469 * @returns The number of bytes written to the buffer (including the
470 * terminating byte). If the keysym does not have a Unicode
471 * representation, returns 0. If the buffer is too small, returns -1.
473 * This function does not perform any @ref keysym-transformations.
474 * Therefore, prefer to use xkb_state_key_get_utf8() if possible.
476 * @sa xkb_state_key_get_utf8()
479 xkb_keysym_to_utf8(xkb_keysym_t keysym, char *buffer, size_t size);
482 * Get the Unicode/UTF-32 representation of a keysym.
484 * @returns The Unicode/UTF-32 representation of keysym, which is also
485 * compatible with UCS-4. If the keysym does not have a Unicode
486 * representation, returns 0.
488 * This function does not perform any @ref keysym-transformations.
489 * Therefore, prefer to use xkb_state_key_get_utf32() if possible.
491 * @sa xkb_state_key_get_utf32()
494 xkb_keysym_to_utf32(xkb_keysym_t keysym);
497 * Get the keysym corresponding to a Unicode/UTF-32 codepoint.
499 * @returns The keysym corresponding to the specified Unicode
500 * codepoint, or XKB_KEY_NoSymbol if there is none.
502 * This function is the inverse of @ref xkb_keysym_to_utf32. In cases
503 * where a single codepoint corresponds to multiple keysyms, returns
504 * the keysym with the lowest value.
506 * Unicode codepoints which do not have a special (legacy) keysym
507 * encoding use a direct encoding scheme. These keysyms don't usually
508 * have an associated keysym constant (XKB_KEY_*).
510 * For noncharacter Unicode codepoints and codepoints outside of the
511 * defined Unicode planes this function returns XKB_KEY_NoSymbol.
513 * @sa xkb_keysym_to_utf32()
517 xkb_utf32_to_keysym(uint32_t ucs);
520 * Convert a keysym to its uppercase form.
522 * If there is no such form, the keysym is returned unchanged.
524 * The conversion rules may be incomplete; prefer to work with the Unicode
525 * representation instead, when possible.
528 xkb_keysym_to_upper(xkb_keysym_t ks);
531 * Convert a keysym to its lowercase form.
533 * The conversion rules may be incomplete; prefer to work with the Unicode
534 * representation instead, when possible.
537 xkb_keysym_to_lower(xkb_keysym_t ks);
542 * @defgroup context Library Context
543 * Creating, destroying and using library contexts.
545 * Every keymap compilation request must have a context associated with
546 * it. The context keeps around state such as the include path.
552 * @page envvars Environment Variables
554 * The user may set some environment variables which affect the library:
556 * - `XKB_CONFIG_ROOT`, `XDG_CONFIG_DIR`, `HOME` - see @ref include-path.
557 * - `XKB_LOG_LEVEL` - see xkb_context_set_log_level().
558 * - `XKB_LOG_VERBOSITY` - see xkb_context_set_log_verbosity().
559 * - `XKB_DEFAULT_RULES`, `XKB_DEFAULT_MODEL`, `XKB_DEFAULT_LAYOUT`,
560 * `XKB_DEFAULT_VARIANT`, `XKB_DEFAULT_OPTIONS` - see xkb_rule_names.
563 /** Flags for context creation. */
564 enum xkb_context_flags {
565 /** Do not apply any context flags. */
566 XKB_CONTEXT_NO_FLAGS = 0,
567 /** Create this context with an empty include path. */
568 XKB_CONTEXT_NO_DEFAULT_INCLUDES = (1 << 0),
570 * Don't take RMLVO names from the environment.
573 XKB_CONTEXT_NO_ENVIRONMENT_NAMES = (1 << 1)
577 * Create a new context.
579 * @param flags Optional flags for the context, or 0.
581 * @returns A new context, or NULL on failure.
583 * @memberof xkb_context
586 xkb_context_new(enum xkb_context_flags flags);
589 * Take a new reference on a context.
591 * @returns The passed in context.
593 * @memberof xkb_context
596 xkb_context_ref(struct xkb_context *context);
599 * Release a reference on a context, and possibly free it.
601 * @param context The context. If it is NULL, this function does nothing.
603 * @memberof xkb_context
606 xkb_context_unref(struct xkb_context *context);
609 * Store custom user data in the context.
611 * This may be useful in conjunction with xkb_context_set_log_fn() or other
614 * @memberof xkb_context
617 xkb_context_set_user_data(struct xkb_context *context, void *user_data);
620 * Retrieves stored user data from the context.
622 * @returns The stored user data. If the user data wasn't set, or the
623 * passed in context is NULL, returns NULL.
625 * This may be useful to access private user data from callbacks like a
626 * custom logging function.
628 * @memberof xkb_context
631 xkb_context_get_user_data(struct xkb_context *context);
636 * @defgroup include-path Include Paths
637 * Manipulating the include paths in a context.
639 * The include paths are the file-system paths that are searched when an
640 * include statement is encountered during keymap compilation.
642 * The default include paths are, in that lookup order:
643 * - The path `$XDG_CONFIG_HOME/xkb`, with the usual `XDG_CONFIG_HOME`
644 * fallback to `$HOME/.config/` if unset.
645 * - The path `$HOME/.xkb`, where $HOME is the value of the environment
647 * - The `XKB_CONFIG_ROOT` environment variable, if defined, otherwise
648 * the system XKB root, defined at library configuration time.
654 * Append a new entry to the context's include path.
656 * @returns 1 on success, or 0 if the include path could not be added or is
659 * @memberof xkb_context
662 xkb_context_include_path_append(struct xkb_context *context, const char *path);
665 * Append the default include paths to the context's include path.
667 * @returns 1 on success, or 0 if the primary include path could not be added.
669 * @memberof xkb_context
672 xkb_context_include_path_append_default(struct xkb_context *context);
675 * Reset the context's include path to the default.
677 * Removes all entries from the context's include path, and inserts the
680 * @returns 1 on success, or 0 if the primary include path could not be added.
682 * @memberof xkb_context
685 xkb_context_include_path_reset_defaults(struct xkb_context *context);
688 * Remove all entries from the context's include path.
690 * @memberof xkb_context
693 xkb_context_include_path_clear(struct xkb_context *context);
696 * Get the number of paths in the context's include path.
698 * @memberof xkb_context
701 xkb_context_num_include_paths(struct xkb_context *context);
704 * Get a specific include path from the context's include path.
706 * @returns The include path at the specified index. If the index is
707 * invalid, returns NULL.
709 * @memberof xkb_context
712 xkb_context_include_path_get(struct xkb_context *context, unsigned int index);
717 * @defgroup logging Logging Handling
718 * Manipulating how logging from this library is handled.
723 /** Specifies a logging level. */
725 XKB_LOG_LEVEL_CRITICAL = 10, /**< Log critical internal errors only. */
726 XKB_LOG_LEVEL_ERROR = 20, /**< Log all errors. */
727 XKB_LOG_LEVEL_WARNING = 30, /**< Log warnings and errors. */
728 XKB_LOG_LEVEL_INFO = 40, /**< Log information, warnings, and errors. */
729 XKB_LOG_LEVEL_DEBUG = 50 /**< Log everything. */
733 * Set the current logging level.
735 * @param context The context in which to set the logging level.
736 * @param level The logging level to use. Only messages from this level
737 * and below will be logged.
739 * The default level is XKB_LOG_LEVEL_ERROR. The environment variable
740 * XKB_LOG_LEVEL, if set in the time the context was created, overrides the
741 * default value. It may be specified as a level number or name.
743 * @memberof xkb_context
746 xkb_context_set_log_level(struct xkb_context *context,
747 enum xkb_log_level level);
750 * Get the current logging level.
752 * @memberof xkb_context
755 xkb_context_get_log_level(struct xkb_context *context);
758 * Sets the current logging verbosity.
760 * The library can generate a number of warnings which are not helpful to
761 * ordinary users of the library. The verbosity may be increased if more
762 * information is desired (e.g. when developing a new keymap).
764 * The default verbosity is 0. The environment variable XKB_LOG_VERBOSITY,
765 * if set in the time the context was created, overrides the default value.
767 * @param context The context in which to use the set verbosity.
768 * @param verbosity The verbosity to use. Currently used values are
769 * 1 to 10, higher values being more verbose. 0 would result in no verbose
770 * messages being logged.
772 * Most verbose messages are of level XKB_LOG_LEVEL_WARNING or lower.
774 * @memberof xkb_context
777 xkb_context_set_log_verbosity(struct xkb_context *context, int verbosity);
780 * Get the current logging verbosity of the context.
782 * @memberof xkb_context
785 xkb_context_get_log_verbosity(struct xkb_context *context);
788 * Set a custom function to handle logging messages.
790 * @param context The context in which to use the set logging function.
791 * @param log_fn The function that will be called for logging messages.
792 * Passing NULL restores the default function, which logs to stderr.
794 * By default, log messages from this library are printed to stderr. This
795 * function allows you to replace the default behavior with a custom
796 * handler. The handler is only called with messages which match the
797 * current logging level and verbosity settings for the context.
798 * level is the logging level of the message. @a format and @a args are
799 * the same as in the vprintf(3) function.
801 * You may use xkb_context_set_user_data() on the context, and then call
802 * xkb_context_get_user_data() from within the logging function to provide
803 * it with additional private context.
805 * @memberof xkb_context
808 xkb_context_set_log_fn(struct xkb_context *context,
809 void (*log_fn)(struct xkb_context *context,
810 enum xkb_log_level level,
811 const char *format, va_list args));
816 * @defgroup keymap Keymap Creation
817 * Creating and destroying keymaps.
822 /** Flags for keymap compilation. */
823 enum xkb_keymap_compile_flags {
824 /** Do not apply any flags. */
825 XKB_KEYMAP_COMPILE_NO_FLAGS = 0
829 * Create a keymap from RMLVO names.
831 * The primary keymap entry point: creates a new XKB keymap from a set of
832 * RMLVO (Rules + Model + Layouts + Variants + Options) names.
834 * @param context The context in which to create the keymap.
835 * @param names The RMLVO names to use. See xkb_rule_names.
836 * @param flags Optional flags for the keymap, or 0.
838 * @returns A keymap compiled according to the RMLVO names, or NULL if
839 * the compilation failed.
842 * @memberof xkb_keymap
845 xkb_keymap_new_from_names(struct xkb_context *context,
846 const struct xkb_rule_names *names,
847 enum xkb_keymap_compile_flags flags);
849 /** The possible keymap formats. */
850 enum xkb_keymap_format {
851 /** The current/classic XKB text format, as generated by xkbcomp -xkb. */
852 XKB_KEYMAP_FORMAT_TEXT_V1 = 1
856 * Create a keymap from a keymap file.
858 * @param context The context in which to create the keymap.
859 * @param file The keymap file to compile.
860 * @param format The text format of the keymap file to compile.
861 * @param flags Optional flags for the keymap, or 0.
863 * @returns A keymap compiled from the given XKB keymap file, or NULL if
864 * the compilation failed.
866 * The file must contain a complete keymap. For example, in the
867 * XKB_KEYMAP_FORMAT_TEXT_V1 format, this means the file must contain one
868 * top level '%xkb_keymap' section, which in turn contains other required
871 * @memberof xkb_keymap
874 xkb_keymap_new_from_file(struct xkb_context *context, FILE *file,
875 enum xkb_keymap_format format,
876 enum xkb_keymap_compile_flags flags);
879 * Create a keymap from a keymap string.
881 * This is just like xkb_keymap_new_from_file(), but instead of a file, gets
882 * the keymap as one enormous string.
884 * @see xkb_keymap_new_from_file()
885 * @memberof xkb_keymap
888 xkb_keymap_new_from_string(struct xkb_context *context, const char *string,
889 enum xkb_keymap_format format,
890 enum xkb_keymap_compile_flags flags);
893 * Create a keymap from a memory buffer.
895 * This is just like xkb_keymap_new_from_string(), but takes a length argument
896 * so the input string does not have to be zero-terminated.
898 * @see xkb_keymap_new_from_string()
899 * @memberof xkb_keymap
903 xkb_keymap_new_from_buffer(struct xkb_context *context, const char *buffer,
904 size_t length, enum xkb_keymap_format format,
905 enum xkb_keymap_compile_flags flags);
908 * Take a new reference on a keymap.
910 * @returns The passed in keymap.
912 * @memberof xkb_keymap
915 xkb_keymap_ref(struct xkb_keymap *keymap);
918 * Release a reference on a keymap, and possibly free it.
920 * @param keymap The keymap. If it is NULL, this function does nothing.
922 * @memberof xkb_keymap
925 xkb_keymap_unref(struct xkb_keymap *keymap);
928 * Get the keymap as a string in the format from which it was created.
929 * @sa xkb_keymap_get_as_string()
931 #define XKB_KEYMAP_USE_ORIGINAL_FORMAT ((enum xkb_keymap_format) -1)
934 * Get the compiled keymap as a string.
936 * @param keymap The keymap to get as a string.
937 * @param format The keymap format to use for the string. You can pass
938 * in the special value XKB_KEYMAP_USE_ORIGINAL_FORMAT to use the format
939 * from which the keymap was originally created.
941 * @returns The keymap as a NUL-terminated string, or NULL if unsuccessful.
943 * The returned string may be fed back into xkb_keymap_new_from_string() to get
944 * the exact same keymap (possibly in another process, etc.).
946 * The returned string is dynamically allocated and should be freed by the
949 * @memberof xkb_keymap
952 xkb_keymap_get_as_string(struct xkb_keymap *keymap,
953 enum xkb_keymap_format format);
958 * @defgroup components Keymap Components
959 * Enumeration of state components in a keymap.
965 * Get the minimum keycode in the keymap.
968 * @memberof xkb_keymap
972 xkb_keymap_min_keycode(struct xkb_keymap *keymap);
975 * Get the maximum keycode in the keymap.
978 * @memberof xkb_keymap
982 xkb_keymap_max_keycode(struct xkb_keymap *keymap);
985 * The iterator used by xkb_keymap_key_for_each().
987 * @sa xkb_keymap_key_for_each
988 * @memberof xkb_keymap
992 (*xkb_keymap_key_iter_t)(struct xkb_keymap *keymap, xkb_keycode_t key,
996 * Run a specified function for every valid keycode in the keymap. If a
997 * keymap is sparse, this function may be called fewer than
998 * (max_keycode - min_keycode + 1) times.
1000 * @sa xkb_keymap_min_keycode() xkb_keymap_max_keycode() xkb_keycode_t
1001 * @memberof xkb_keymap
1005 xkb_keymap_key_for_each(struct xkb_keymap *keymap, xkb_keymap_key_iter_t iter,
1009 * Find the name of the key with the given keycode.
1011 * This function always returns the canonical name of the key (see
1012 * description in xkb_keycode_t).
1014 * @returns The key name. If no key with this keycode exists,
1018 * @memberof xkb_keymap
1022 xkb_keymap_key_get_name(struct xkb_keymap *keymap, xkb_keycode_t key);
1025 * Find the keycode of the key with the given name.
1027 * The name can be either a canonical name or an alias.
1029 * @returns The keycode. If no key with this name exists,
1030 * returns XKB_KEYCODE_INVALID.
1033 * @memberof xkb_keymap
1037 xkb_keymap_key_by_name(struct xkb_keymap *keymap, const char *name);
1040 * Get the number of modifiers in the keymap.
1042 * @sa xkb_mod_index_t
1043 * @memberof xkb_keymap
1046 xkb_keymap_num_mods(struct xkb_keymap *keymap);
1049 * Get the name of a modifier by index.
1051 * @returns The name. If the index is invalid, returns NULL.
1053 * @sa xkb_mod_index_t
1054 * @memberof xkb_keymap
1057 xkb_keymap_mod_get_name(struct xkb_keymap *keymap, xkb_mod_index_t idx);
1060 * Get the index of a modifier by name.
1062 * @returns The index. If no modifier with this name exists, returns
1065 * @sa xkb_mod_index_t
1066 * @memberof xkb_keymap
1069 xkb_keymap_mod_get_index(struct xkb_keymap *keymap, const char *name);
1072 * Get the number of layouts in the keymap.
1074 * @sa xkb_layout_index_t xkb_rule_names xkb_keymap_num_layouts_for_key()
1075 * @memberof xkb_keymap
1078 xkb_keymap_num_layouts(struct xkb_keymap *keymap);
1081 * Get the name of a layout by index.
1083 * @returns The name. If the index is invalid, or the layout does not have
1084 * a name, returns NULL.
1086 * @sa xkb_layout_index_t
1087 * @memberof xkb_keymap
1090 xkb_keymap_layout_get_name(struct xkb_keymap *keymap, xkb_layout_index_t idx);
1093 * Get the index of a layout by name.
1095 * @returns The index. If no layout exists with this name, returns
1096 * XKB_LAYOUT_INVALID. If more than one layout in the keymap has this name,
1097 * returns the lowest index among them.
1099 * @memberof xkb_keymap
1102 xkb_keymap_layout_get_index(struct xkb_keymap *keymap, const char *name);
1105 * Get the number of LEDs in the keymap.
1107 * @warning The range [ 0...xkb_keymap_num_leds() ) includes all of the LEDs
1108 * in the keymap, but may also contain inactive LEDs. When iterating over
1109 * this range, you need the handle this case when calling functions such as
1110 * xkb_keymap_led_get_name() or xkb_state_led_index_is_active().
1112 * @sa xkb_led_index_t
1113 * @memberof xkb_keymap
1116 xkb_keymap_num_leds(struct xkb_keymap *keymap);
1119 * Get the name of a LED by index.
1121 * @returns The name. If the index is invalid, returns NULL.
1123 * @memberof xkb_keymap
1126 xkb_keymap_led_get_name(struct xkb_keymap *keymap, xkb_led_index_t idx);
1129 * Get the index of a LED by name.
1131 * @returns The index. If no LED with this name exists, returns
1134 * @memberof xkb_keymap
1137 xkb_keymap_led_get_index(struct xkb_keymap *keymap, const char *name);
1140 * Get the number of layouts for a specific key.
1142 * This number can be different from xkb_keymap_num_layouts(), but is always
1143 * smaller. It is the appropriate value to use when iterating over the
1146 * @sa xkb_layout_index_t
1147 * @memberof xkb_keymap
1150 xkb_keymap_num_layouts_for_key(struct xkb_keymap *keymap, xkb_keycode_t key);
1153 * Get the number of shift levels for a specific key and layout.
1155 * If @c layout is out of range for this key (that is, larger or equal to
1156 * the value returned by xkb_keymap_num_layouts_for_key()), it is brought
1157 * back into range in a manner consistent with xkb_state_key_get_layout().
1159 * @sa xkb_level_index_t
1160 * @memberof xkb_keymap
1163 xkb_keymap_num_levels_for_key(struct xkb_keymap *keymap, xkb_keycode_t key,
1164 xkb_layout_index_t layout);
1167 * Retrieves every possible modifier mask that produces the specified
1168 * shift level for a specific key and layout.
1170 * This API is useful for inverse key transformation; i.e. finding out
1171 * which modifiers need to be active in order to be able to type the
1172 * keysym(s) corresponding to the specific key code, layout and level.
1174 * @warning It returns only up to masks_size modifier masks. If the
1175 * buffer passed is too small, some of the possible modifier combinations
1176 * will not be returned.
1178 * @param[in] keymap The keymap.
1179 * @param[in] key The keycode of the key.
1180 * @param[in] layout The layout for which to get modifiers.
1181 * @param[in] level The shift level in the layout for which to get the
1182 * modifiers. This should be smaller than:
1183 * @code xkb_keymap_num_levels_for_key(keymap, key) @endcode
1184 * @param[out] masks_out A buffer in which the requested masks should be
1186 * @param[out] masks_size The size of the buffer pointed to by masks_out.
1188 * If @c layout is out of range for this key (that is, larger or equal to
1189 * the value returned by xkb_keymap_num_layouts_for_key()), it is brought
1190 * back into range in a manner consistent with xkb_state_key_get_layout().
1192 * @returns The number of modifier masks stored in the masks_out array.
1193 * If the key is not in the keymap or if the specified shift level cannot
1194 * be reached it returns 0 and does not modify the masks_out buffer.
1196 * @sa xkb_level_index_t
1197 * @sa xkb_mod_mask_t
1198 * @memberof xkb_keymap
1202 xkb_keymap_key_get_mods_for_level(struct xkb_keymap *keymap,
1204 xkb_layout_index_t layout,
1205 xkb_level_index_t level,
1206 xkb_mod_mask_t *masks_out,
1210 * Get the keysyms obtained from pressing a key in a given layout and
1213 * This function is like xkb_state_key_get_syms(), only the layout and
1214 * shift level are not derived from the keyboard state but are instead
1215 * specified explicitly.
1217 * @param[in] keymap The keymap.
1218 * @param[in] key The keycode of the key.
1219 * @param[in] layout The layout for which to get the keysyms.
1220 * @param[in] level The shift level in the layout for which to get the
1221 * keysyms. This should be smaller than:
1222 * @code xkb_keymap_num_levels_for_key(keymap, key) @endcode
1223 * @param[out] syms_out An immutable array of keysyms corresponding to the
1224 * key in the given layout and shift level.
1226 * If @c layout is out of range for this key (that is, larger or equal to
1227 * the value returned by xkb_keymap_num_layouts_for_key()), it is brought
1228 * back into range in a manner consistent with xkb_state_key_get_layout().
1230 * @returns The number of keysyms in the syms_out array. If no keysyms
1231 * are produced by the key in the given layout and shift level, returns 0
1232 * and sets syms_out to NULL.
1234 * @sa xkb_state_key_get_syms()
1235 * @memberof xkb_keymap
1238 xkb_keymap_key_get_syms_by_level(struct xkb_keymap *keymap,
1240 xkb_layout_index_t layout,
1241 xkb_level_index_t level,
1242 const xkb_keysym_t **syms_out);
1245 * Determine whether a key should repeat or not.
1247 * A keymap may specify different repeat behaviors for different keys.
1248 * Most keys should generally exhibit repeat behavior; for example, holding
1249 * the 'a' key down in a text editor should normally insert a single 'a'
1250 * character every few milliseconds, until the key is released. However,
1251 * there are keys which should not or do not need to be repeated. For
1252 * example, repeating modifier keys such as Left/Right Shift or Caps Lock
1253 * is not generally useful or desired.
1255 * @returns 1 if the key should repeat, 0 otherwise.
1257 * @memberof xkb_keymap
1260 xkb_keymap_key_repeats(struct xkb_keymap *keymap, xkb_keycode_t key);
1265 * @defgroup state Keyboard State
1266 * Creating, destroying and manipulating keyboard state objects.
1272 * Create a new keyboard state object.
1274 * @param keymap The keymap which the state will use.
1276 * @returns A new keyboard state object, or NULL on failure.
1278 * @memberof xkb_state
1281 xkb_state_new(struct xkb_keymap *keymap);
1284 * Take a new reference on a keyboard state object.
1286 * @returns The passed in object.
1288 * @memberof xkb_state
1291 xkb_state_ref(struct xkb_state *state);
1294 * Release a reference on a keybaord state object, and possibly free it.
1296 * @param state The state. If it is NULL, this function does nothing.
1298 * @memberof xkb_state
1301 xkb_state_unref(struct xkb_state *state);
1304 * Get the keymap which a keyboard state object is using.
1306 * @returns The keymap which was passed to xkb_state_new() when creating
1307 * this state object.
1309 * This function does not take a new reference on the keymap; you must
1310 * explicitly reference it yourself if you plan to use it beyond the
1311 * lifetime of the state.
1313 * @memberof xkb_state
1316 xkb_state_get_keymap(struct xkb_state *state);
1318 /** Specifies the direction of the key (press / release). */
1319 enum xkb_key_direction {
1320 XKB_KEY_UP, /**< The key was released. */
1321 XKB_KEY_DOWN /**< The key was pressed. */
1325 * Modifier and layout types for state objects. This enum is bitmaskable,
1326 * e.g. (XKB_STATE_MODS_DEPRESSED | XKB_STATE_MODS_LATCHED) is valid to
1327 * exclude locked modifiers.
1329 * In XKB, the DEPRESSED components are also known as 'base'.
1331 enum xkb_state_component {
1332 /** Depressed modifiers, i.e. a key is physically holding them. */
1333 XKB_STATE_MODS_DEPRESSED = (1 << 0),
1334 /** Latched modifiers, i.e. will be unset after the next non-modifier
1336 XKB_STATE_MODS_LATCHED = (1 << 1),
1337 /** Locked modifiers, i.e. will be unset after the key provoking the
1338 * lock has been pressed again. */
1339 XKB_STATE_MODS_LOCKED = (1 << 2),
1340 /** Effective modifiers, i.e. currently active and affect key
1341 * processing (derived from the other state components).
1342 * Use this unless you explicitly care how the state came about. */
1343 XKB_STATE_MODS_EFFECTIVE = (1 << 3),
1344 /** Depressed layout, i.e. a key is physically holding it. */
1345 XKB_STATE_LAYOUT_DEPRESSED = (1 << 4),
1346 /** Latched layout, i.e. will be unset after the next non-modifier
1348 XKB_STATE_LAYOUT_LATCHED = (1 << 5),
1349 /** Locked layout, i.e. will be unset after the key provoking the lock
1350 * has been pressed again. */
1351 XKB_STATE_LAYOUT_LOCKED = (1 << 6),
1352 /** Effective layout, i.e. currently active and affects key processing
1353 * (derived from the other state components).
1354 * Use this unless you explicitly care how the state came about. */
1355 XKB_STATE_LAYOUT_EFFECTIVE = (1 << 7),
1356 /** LEDs (derived from the other state components). */
1357 XKB_STATE_LEDS = (1 << 8)
1361 * Update the keyboard state to reflect a given key being pressed or
1364 * This entry point is intended for programs which track the keyboard state
1365 * explicitly (like an evdev client). If the state is serialized to you by
1366 * a master process (like a Wayland compositor) using functions like
1367 * xkb_state_serialize_mods(), you should use xkb_state_update_mask() instead.
1368 * The two functions should not generally be used together.
1370 * A series of calls to this function should be consistent; that is, a call
1371 * with XKB_KEY_DOWN for a key should be matched by an XKB_KEY_UP; if a key
1372 * is pressed twice, it should be released twice; etc. Otherwise (e.g. due
1373 * to missed input events), situations like "stuck modifiers" may occur.
1375 * This function is often used in conjunction with the function
1376 * xkb_state_key_get_syms() (or xkb_state_key_get_one_sym()), for example,
1377 * when handling a key event. In this case, you should prefer to get the
1378 * keysyms *before* updating the key, such that the keysyms reported for
1379 * the key event are not affected by the event itself. This is the
1380 * conventional behavior.
1382 * @returns A mask of state components that have changed as a result of
1383 * the update. If nothing in the state has changed, returns 0.
1385 * @memberof xkb_state
1387 * @sa xkb_state_update_mask()
1389 enum xkb_state_component
1390 xkb_state_update_key(struct xkb_state *state, xkb_keycode_t key,
1391 enum xkb_key_direction direction);
1394 * Update a keyboard state from a set of explicit masks.
1396 * This entry point is intended for window systems and the like, where a
1397 * master process holds an xkb_state, then serializes it over a wire
1398 * protocol, and clients then use the serialization to feed in to their own
1401 * All parameters must always be passed, or the resulting state may be
1404 * The serialization is lossy and will not survive round trips; it must only
1405 * be used to feed slave state objects, and must not be used to update the
1408 * If you do not fit the description above, you should use
1409 * xkb_state_update_key() instead. The two functions should not generally be
1412 * @returns A mask of state components that have changed as a result of
1413 * the update. If nothing in the state has changed, returns 0.
1415 * @memberof xkb_state
1417 * @sa xkb_state_component
1418 * @sa xkb_state_update_key
1420 enum xkb_state_component
1421 xkb_state_update_mask(struct xkb_state *state,
1422 xkb_mod_mask_t depressed_mods,
1423 xkb_mod_mask_t latched_mods,
1424 xkb_mod_mask_t locked_mods,
1425 xkb_layout_index_t depressed_layout,
1426 xkb_layout_index_t latched_layout,
1427 xkb_layout_index_t locked_layout);
1430 * Get the keysyms obtained from pressing a particular key in a given
1433 * Get the keysyms for a key according to the current active layout,
1434 * modifiers and shift level for the key, as determined by a keyboard
1437 * @param[in] state The keyboard state object.
1438 * @param[in] key The keycode of the key.
1439 * @param[out] syms_out An immutable array of keysyms corresponding the
1440 * key in the given keyboard state.
1442 * As an extension to XKB, this function can return more than one keysym.
1443 * If you do not want to handle this case, you can use
1444 * xkb_state_key_get_one_sym() for a simpler interface.
1446 * This function does not perform any @ref keysym-transformations.
1447 * (This might change).
1449 * @returns The number of keysyms in the syms_out array. If no keysyms
1450 * are produced by the key in the given keyboard state, returns 0 and sets
1453 * @memberof xkb_state
1456 xkb_state_key_get_syms(struct xkb_state *state, xkb_keycode_t key,
1457 const xkb_keysym_t **syms_out);
1460 * Get the Unicode/UTF-8 string obtained from pressing a particular key
1461 * in a given keyboard state.
1463 * @param[in] state The keyboard state object.
1464 * @param[in] key The keycode of the key.
1465 * @param[out] buffer A buffer to write the string into.
1466 * @param[in] size Size of the buffer.
1468 * @warning If the buffer passed is too small, the string is truncated
1469 * (though still NUL-terminated).
1471 * @returns The number of bytes required for the string, excluding the
1472 * NUL byte. If there is nothing to write, returns 0.
1474 * You may check if truncation has occurred by comparing the return value
1475 * with the size of @p buffer, similarly to the snprintf(3) function.
1476 * You may safely pass NULL and 0 to @p buffer and @p size to find the
1477 * required size (without the NUL-byte).
1479 * This function performs Capitalization and Control @ref
1480 * keysym-transformations.
1482 * @memberof xkb_state
1486 xkb_state_key_get_utf8(struct xkb_state *state, xkb_keycode_t key,
1487 char *buffer, size_t size);
1490 * Get the Unicode/UTF-32 codepoint obtained from pressing a particular
1491 * key in a a given keyboard state.
1493 * @returns The UTF-32 representation for the key, if it consists of only
1494 * a single codepoint. Otherwise, returns 0.
1496 * This function performs Capitalization and Control @ref
1497 * keysym-transformations.
1499 * @memberof xkb_state
1503 xkb_state_key_get_utf32(struct xkb_state *state, xkb_keycode_t key);
1506 * Get the single keysym obtained from pressing a particular key in a
1507 * given keyboard state.
1509 * This function is similar to xkb_state_key_get_syms(), but intended
1510 * for users which cannot or do not want to handle the case where
1511 * multiple keysyms are returned (in which case this function is
1514 * @returns The keysym. If the key does not have exactly one keysym,
1515 * returns XKB_KEY_NoSymbol
1517 * This function performs Capitalization @ref keysym-transformations.
1519 * @sa xkb_state_key_get_syms()
1520 * @memberof xkb_state
1523 xkb_state_key_get_one_sym(struct xkb_state *state, xkb_keycode_t key);
1526 * Get the effective layout index for a key in a given keyboard state.
1528 * @returns The layout index for the key in the given keyboard state. If
1529 * the given keycode is invalid, or if the key is not included in any
1530 * layout at all, returns XKB_LAYOUT_INVALID.
1532 * @invariant If the returned layout is valid, the following always holds:
1534 * xkb_state_key_get_layout(state, key) < xkb_keymap_num_layouts_for_key(keymap, key)
1537 * @memberof xkb_state
1540 xkb_state_key_get_layout(struct xkb_state *state, xkb_keycode_t key);
1543 * Get the effective shift level for a key in a given keyboard state and
1546 * @param state The keyboard state.
1547 * @param key The keycode of the key.
1548 * @param layout The layout for which to get the shift level. This must be
1550 * @code xkb_keymap_num_layouts_for_key(keymap, key) @endcode
1551 * usually it would be:
1552 * @code xkb_state_key_get_layout(state, key) @endcode
1554 * @return The shift level index. If the key or layout are invalid,
1555 * returns XKB_LEVEL_INVALID.
1557 * @invariant If the returned level is valid, the following always holds:
1559 * xkb_state_key_get_level(state, key, layout) < xkb_keymap_num_levels_for_key(keymap, key, layout)
1562 * @memberof xkb_state
1565 xkb_state_key_get_level(struct xkb_state *state, xkb_keycode_t key,
1566 xkb_layout_index_t layout);
1569 * Match flags for xkb_state_mod_indices_are_active() and
1570 * xkb_state_mod_names_are_active(), specifying the conditions for a
1571 * successful match. XKB_STATE_MATCH_NON_EXCLUSIVE is bitmaskable with
1574 enum xkb_state_match {
1575 /** Returns true if any of the modifiers are active. */
1576 XKB_STATE_MATCH_ANY = (1 << 0),
1577 /** Returns true if all of the modifiers are active. */
1578 XKB_STATE_MATCH_ALL = (1 << 1),
1579 /** Makes matching non-exclusive, i.e. will not return false if a
1580 * modifier not specified in the arguments is active. */
1581 XKB_STATE_MATCH_NON_EXCLUSIVE = (1 << 16)
1585 * The counterpart to xkb_state_update_mask for modifiers, to be used on
1586 * the server side of serialization.
1588 * @param state The keyboard state.
1589 * @param components A mask of the modifier state components to serialize.
1590 * State components other than XKB_STATE_MODS_* are ignored.
1591 * If XKB_STATE_MODS_EFFECTIVE is included, all other state components are
1594 * @returns A xkb_mod_mask_t representing the given components of the
1597 * This function should not be used in regular clients; please use the
1598 * xkb_state_mod_*_is_active API instead.
1600 * @memberof xkb_state
1603 xkb_state_serialize_mods(struct xkb_state *state,
1604 enum xkb_state_component components);
1607 * The counterpart to xkb_state_update_mask for layouts, to be used on
1608 * the server side of serialization.
1610 * @param state The keyboard state.
1611 * @param components A mask of the layout state components to serialize.
1612 * State components other than XKB_STATE_LAYOUT_* are ignored.
1613 * If XKB_STATE_LAYOUT_EFFECTIVE is included, all other state components are
1616 * @returns A layout index representing the given components of the
1619 * This function should not be used in regular clients; please use the
1620 * xkb_state_layout_*_is_active API instead.
1622 * @memberof xkb_state
1625 xkb_state_serialize_layout(struct xkb_state *state,
1626 enum xkb_state_component components);
1629 * Test whether a modifier is active in a given keyboard state by name.
1631 * @returns 1 if the modifier is active, 0 if it is not. If the modifier
1632 * name does not exist in the keymap, returns -1.
1634 * @memberof xkb_state
1637 xkb_state_mod_name_is_active(struct xkb_state *state, const char *name,
1638 enum xkb_state_component type);
1641 * Test whether a set of modifiers are active in a given keyboard state by
1644 * @param state The keyboard state.
1645 * @param type The component of the state against which to match the
1647 * @param match The manner by which to match the state against the
1649 * @param ... The set of of modifier names to test, terminated by a NULL
1650 * argument (sentinel).
1652 * @returns 1 if the modifiers are active, 0 if they are not. If any of
1653 * the modifier names do not exist in the keymap, returns -1.
1655 * @memberof xkb_state
1658 xkb_state_mod_names_are_active(struct xkb_state *state,
1659 enum xkb_state_component type,
1660 enum xkb_state_match match,
1664 * Test whether a modifier is active in a given keyboard state by index.
1666 * @returns 1 if the modifier is active, 0 if it is not. If the modifier
1667 * index is invalid in the keymap, returns -1.
1669 * @memberof xkb_state
1672 xkb_state_mod_index_is_active(struct xkb_state *state, xkb_mod_index_t idx,
1673 enum xkb_state_component type);
1676 * Test whether a set of modifiers are active in a given keyboard state by
1679 * @param state The keyboard state.
1680 * @param type The component of the state against which to match the
1682 * @param match The manner by which to match the state against the
1684 * @param ... The set of of modifier indices to test, terminated by a
1685 * XKB_MOD_INVALID argument (sentinel).
1687 * @returns 1 if the modifiers are active, 0 if they are not. If any of
1688 * the modifier indices are invalid in the keymap, returns -1.
1690 * @memberof xkb_state
1693 xkb_state_mod_indices_are_active(struct xkb_state *state,
1694 enum xkb_state_component type,
1695 enum xkb_state_match match,
1699 * @page consumed-modifiers Consumed Modifiers
1702 * Some functions, like xkb_state_key_get_syms(), look at the state of
1703 * the modifiers in the keymap and derive from it the correct shift level
1704 * to use for the key. For example, in a US layout, pressing the key
1705 * labeled \<A\> while the Shift modifier is active, generates the keysym
1706 * 'A'. In this case, the Shift modifier is said to be "consumed".
1707 * However, the Num Lock modifier does not affect this translation at all,
1708 * even if it is active, so it is not consumed by this translation.
1710 * It may be desirable for some application to not reuse consumed modifiers
1711 * for further processing, e.g. for hotkeys or keyboard shortcuts. To
1712 * understand why, consider some requirements from a standard shortcut
1713 * mechanism, and how they are implemented:
1715 * 1. The shortcut's modifiers must match exactly to the state. For
1716 * example, it is possible to bind separate actions to \<Alt\>\<Tab\>
1717 * and to \<Alt\>\<Shift\>\<Tab\>. Further, if only \<Alt\>\<Tab\> is
1718 * bound to an action, pressing \<Alt\>\<Shift\>\<Tab\> should not
1719 * trigger the shortcut.
1720 * Effectively, this means that the modifiers are compared using the
1721 * equality operator (==).
1723 * 2. Only relevant modifiers are considered for the matching. For example,
1724 * Caps Lock and Num Lock should not generally affect the matching, e.g.
1725 * when matching \<Alt\>\<Tab\> against the state, it does not matter
1726 * whether Num Lock is active or not. These relevant, or "significant",
1727 * modifiers usually include Alt, Control, Shift, Super and similar.
1728 * Effectively, this means that non-significant modifiers are masked out,
1729 * before doing the comparison as described above.
1731 * 3. The matching must be independent of the layout/keymap. For example,
1732 * the \<Plus\> (+) symbol is found on the first level on some layouts,
1733 * but requires holding Shift on others. If you simply bind the action
1734 * to the \<Plus\> keysym, it would work for the unshifted kind, but
1735 * not for the others, because the match against Shift would fail. If
1736 * you bind the action to \<Shift\>\<Plus\>, only the shifted kind would
1737 * work. So what is needed is to recognize that Shift is used up in the
1738 * translation of the keysym itself, and therefore should not be included
1740 * Effectively, this means that consumed modifiers (Shift in this example)
1741 * are masked out as well, before doing the comparison.
1743 * In summary, this is approximately how the matching would be performed:
1745 * (keysym == shortcut_keysym) &&
1746 * ((state_mods & ~consumed_mods & significant_mods) == shortcut_mods)
1749 * @c state_mods are the modifiers reported by
1750 * xkb_state_mod_index_is_active() and similar functions.
1751 * @c consumed_mods are the modifiers reported by
1752 * xkb_state_mod_index_is_consumed() and similar functions.
1753 * @c significant_mods are decided upon by the application/toolkit/user;
1754 * it is up to them to decide whether these are configurable or hard-coded.
1760 * Consumed modifiers mode.
1762 * There are several possible methods for deciding which modifiers are
1763 * consumed and which are not, each applicable for different systems or
1764 * situations. The mode selects the method to use.
1766 * Keep in mind that in all methods, the keymap may decide to "preserve"
1767 * a modifier, meaning it is not reported as consumed even if it would
1770 enum xkb_consumed_mode {
1772 * This is the mode defined in the XKB specification and used by libX11.
1774 * A modifier is consumed if and only if it *may affect* key translation.
1776 * For example, if `Control+Alt+<Backspace>` produces some assigned keysym,
1777 * then when pressing just `<Backspace>`, `Control` and `Alt` are consumed,
1778 * even though they are not active, since if they *were* active they would
1779 * have affected key translation.
1781 XKB_CONSUMED_MODE_XKB,
1783 * This is the mode used by the GTK+ toolkit.
1785 * The mode consists of the following two independent heuristics:
1787 * - The currently active set of modifiers, excluding modifiers which do
1788 * not affect the key (as described for @ref XKB_CONSUMED_MODE_XKB), are
1789 * considered consumed, if the keysyms produced when all of them are
1790 * active are different from the keysyms produced when no modifiers are
1793 * - A single modifier is considered consumed if the keysyms produced for
1794 * the key when it is the only active modifier are different from the
1795 * keysyms produced when no modifiers are active.
1797 XKB_CONSUMED_MODE_GTK
1801 * Get the mask of modifiers consumed by translating a given key.
1803 * @param state The keyboard state.
1804 * @param key The keycode of the key.
1805 * @param mode The consumed modifiers mode to use; see enum description.
1807 * @returns a mask of the consumed modifiers.
1809 * @memberof xkb_state
1813 xkb_state_key_get_consumed_mods2(struct xkb_state *state, xkb_keycode_t key,
1814 enum xkb_consumed_mode mode);
1817 * Same as xkb_state_key_get_consumed_mods2() with mode XKB_CONSUMED_MODE_XKB.
1819 * @memberof xkb_state
1823 xkb_state_key_get_consumed_mods(struct xkb_state *state, xkb_keycode_t key);
1826 * Test whether a modifier is consumed by keyboard state translation for
1829 * @param state The keyboard state.
1830 * @param key The keycode of the key.
1831 * @param idx The index of the modifier to check.
1832 * @param mode The consumed modifiers mode to use; see enum description.
1834 * @returns 1 if the modifier is consumed, 0 if it is not. If the modifier
1835 * index is not valid in the keymap, returns -1.
1837 * @sa xkb_state_mod_mask_remove_consumed()
1838 * @sa xkb_state_key_get_consumed_mods()
1839 * @memberof xkb_state
1843 xkb_state_mod_index_is_consumed2(struct xkb_state *state,
1845 xkb_mod_index_t idx,
1846 enum xkb_consumed_mode mode);
1849 * Same as xkb_state_mod_index_is_consumed2() with mode XKB_CONSUMED_MOD_XKB.
1851 * @memberof xkb_state
1855 xkb_state_mod_index_is_consumed(struct xkb_state *state, xkb_keycode_t key,
1856 xkb_mod_index_t idx);
1859 * Remove consumed modifiers from a modifier mask for a key.
1861 * @deprecated Use xkb_state_key_get_consumed_mods2() instead.
1863 * Takes the given modifier mask, and removes all modifiers which are
1864 * consumed for that particular key (as in xkb_state_mod_index_is_consumed()).
1866 * @sa xkb_state_mod_index_is_consumed()
1867 * @memberof xkb_state
1870 xkb_state_mod_mask_remove_consumed(struct xkb_state *state, xkb_keycode_t key,
1871 xkb_mod_mask_t mask);
1874 * Test whether a layout is active in a given keyboard state by name.
1876 * @returns 1 if the layout is active, 0 if it is not. If no layout with
1877 * this name exists in the keymap, return -1.
1879 * If multiple layouts in the keymap have this name, the one with the lowest
1882 * @sa xkb_layout_index_t
1883 * @memberof xkb_state
1886 xkb_state_layout_name_is_active(struct xkb_state *state, const char *name,
1887 enum xkb_state_component type);
1890 * Test whether a layout is active in a given keyboard state by index.
1892 * @returns 1 if the layout is active, 0 if it is not. If the layout index
1893 * is not valid in the keymap, returns -1.
1895 * @sa xkb_layout_index_t
1896 * @memberof xkb_state
1899 xkb_state_layout_index_is_active(struct xkb_state *state,
1900 xkb_layout_index_t idx,
1901 enum xkb_state_component type);
1904 * Test whether a LED is active in a given keyboard state by name.
1906 * @returns 1 if the LED is active, 0 if it not. If no LED with this name
1907 * exists in the keymap, returns -1.
1909 * @sa xkb_led_index_t
1910 * @memberof xkb_state
1913 xkb_state_led_name_is_active(struct xkb_state *state, const char *name);
1916 * Test whether a LED is active in a given keyboard state by index.
1918 * @returns 1 if the LED is active, 0 if it not. If the LED index is not
1919 * valid in the keymap, returns -1.
1921 * @sa xkb_led_index_t
1922 * @memberof xkb_state
1925 xkb_state_led_index_is_active(struct xkb_state *state, xkb_led_index_t idx);
1929 /* Leave this include last, so it can pick up our types, etc. */
1930 #include <xkbcommon/xkbcommon-compat.h>
1936 #endif /* _XKBCOMMON_H_ */