kc3-lang/libxkbcommon/src

src

Log

Author Commit Date CI Message
Pierre Le Marre e9fd95a5 2025-07-23T10:01:45 keysyms: Update using latest xorgproto xorgproto commit: 7fc33fe6d9cf0abc9b62ee976e5cb7ddcd050d1f Relevant MR: https://gitlab.freedesktop.org/xorg/proto/xorgproto/-/merge_requests/93
Pierre Le Marre d60b3213 2025-07-16T08:00:30 Make the ref counting invariants explicit with assertions
Pierre Le Marre 93818226 2025-07-15T11:34:06 Add xkb_rmlvo_builder_ref()
Pierre Le Marre dc63e5f8 2025-07-07T12:28:24 Ensure config.h is always included first While `config.h` may not be necessary in every file, it ensures consistency and makes code refactoring safer.
Pierre Le Marre b21a58d0 2025-07-01T14:52:11 Add support for all level indices to LevelN constants Note that serialization must use numbers instead of names for levels > 8, to ensure backward compatibility.
Pierre Le Marre e73d1a4d 2025-07-01T13:05:44 Add support for all layout indices to GroupN constants This commit enables to use the pattern `Group<INDEX>` for any valid group index `<INDEX>`. Note that the original code in xkbcomp allows constants up to `Group8`, but then will fail if the resulting group is > 4. There does not seem to be any use case for this for such “feature”; it seems rather to be a relic from times were the 4-groups limit was not hopelessly fixed in X. So for consistency in our code base, starting with this commit we now disallow `Group5`..`Group8` for keymap format v1, since it is limited to 4 groups. Also fixed a regression in the serialization of group action, when the group is relative.
Pierre Le Marre 64b1b9d7 2025-07-01T13:03:59 utils: Optimize istreq_prefix
Pierre Le Marre 84914512 2025-07-01T18:37:22 chore: Rename indexes to indices Before this commit there was a mix between the two forms. While “indexes” is correct, “indices” is more usual and also the historical form used in this project.
Pierre Le Marre 58373807 2025-06-27T18:21:19 keysym: Do not convert UTF-32 to deprecated keysyms Before this commit, some code points could be converted to deprecated keysym. This is incorrect, because the relevant keysyms are all deprecated because their mapping to Unicode is uncertain! Ensure that `xkb_utf32_to_keysym()` never returns deprecated keysyms, because there is either another non-deprecated keysym or in last resort we always have the correct keysym available in the Unicode keysym range.
Pierre Le Marre 05d13d5f 2025-06-26T16:58:50 include: Fix infinite loop Fixed including an absolute path with no default map triggering an infinite loop.
Pierre Le Marre c4f4ba41 2025-06-23T18:15:18 state: Fix modifier and group latch Prior to this commit, the sequences: - 1. latch A ↓ 2. latch B ↓ 3. latch B ↑ 4. latch A ↑ - 1. latch A ↓ 2. latch B ↓ 3. latch A ↑ 4. latch B ↑ would result in only B being latched, because the XKB protocol specifies that latches are triggered only if keys are *sequentially* tapped, i.e. a strict sequence of press and release of each key. It seems an unnecessary limitation: - `SlowKeys` and `XkbAX_TwoKeys` are the proper accessibility features to control accidental key presses, not latches nor `StickyKeys`. - Latches are also used outside their original accessibility role. A user may activate multiple latch keys simultaneously: - same hand: two latch keys being close to each other; - different hand: two keys being activated independently. Changed the latching behavior so that the rules used to break a latch are the same than those used to prevent it. Depressing and releasing two latching keys simultaneously will now activate both latches, as expected. Since this is a breaking change, it is enabled only by the keymap format `XKB_KEYMAP_FORMAT_TEXT_V2`.
Pierre Le Marre 3d00222e 2025-06-21T18:26:34 keymap: Add option `unlockOnPress` for LatchMods() It mirrors the feature of `SetMods()`, so that `StickyKeys` can be implemented.
Pierre Le Marre d192b3b6 2025-06-19T21:57:46 keymap: Add option `unlockOnPress` for SetMods() It enables e.g. to deactivate `CapsLock` *on press* rather than on release, as in other platforms such as Windows. It fixes a [18-year old issue] inherited from the X11 ecosystem, by extending the [XKB protocol key actions]. As it is incompatible with X11, this feature is available only using the keymap text format v2. [18-year old issue]: https://gitlab.freedesktop.org/xkeyboard-config/xkeyboard-config/-/issues/74 [XKB protocol key actions]: https://www.x.org/releases/current/doc/kbproto/xkbproto.html#Key_Actions
Pierre Le Marre ee87f6ed 2025-06-21T19:28:53 state: Fix broken latch not honoring clearLocks=no Before this commit, breaking a latch (modifier & group) would always clear locks, even if `clearLocks=no`.
Pierre Le Marre 94d8e341 2025-06-21T13:17:16 state: Fix LatchMods mutation to SetMods or LockMods Previously we use inlined version of the corresponding filter functions of the `SetMods()` and `LockMods()` actions, but they were incomplete and did not set some fields (`priv`, `refcnt`) properly. Also, it is error-prone: it requires discipline to keep it in sync. E.g. before this commit, converting to `LockMods()` would always try to unlock `CapsLock` due to the wrong value of the `priv` field. Fixed by using the corresponding filter functions directly, so that we always mutate the filter properly, as in `xkb_filter_group_latch_func`.
Peter Hutterer 7a7a3b38 2024-02-14T09:47:15 keymap: Canonically map unmapped virtual modifiers Traditionally, *virtual* modifiers were merely name aliases for *real* modifiers (X *core* modifiers), e.g. `NumLock` was usually mapped to `Mod2` (see `modifier_map` statement). Virtual modifiers that were never mapped to a real ones had no effect on the keymap state. xkbcommon already supports the concept of “pure” virtual modifiers, i.e. virtual modifiers that are *encoded* using the full 32-bit range, not just the first 8 bits corresponding to the real modifiers. But until this commit, one had to declare such mapping *explicitly*: e.g. `virtual_modifiers M = 0x100;`. This has at least two drawbacks: - Numerical values may look quite arbitrary and are not user-friendly. It’s OK in the resulting compiled keymap, but it requires careful sync between sections when developing KcCGST files. - If the modifier is *also* mapped *implicitly* using the traditional `vmodmap`/`modifier_map`, then both mappings are OR-combined. This patch enables to automatically map unmapped virtual modifiers to their *canonical* mapping, i.e. themselves: their corresponding virtual and real modifier masks are identical: `1u << mod_index`. Since this feature is incompatible with X11, this is guarded by requiring at least keymap text format **v2**. Note that for now, canonical virtual modifiers cannot be used in an interpret action’s `AnyOf()`. An interpret action for a canonical virtual modifier must be `AnyOfOrNone()` to take effect: virtual_modifiers APureMod, …; interpret a+AnyOfOrNone(all) { virtualModifier= APureMod; action= SetMods(modifiers=APureMod); }; The above adds a virtual modifier `APureMod` for keysym `a`. It will be canonical iff it is not mapped implicitly.
Pierre Le Marre 69c3d257 2025-06-17T16:43:05 keymap: Add parameter `latchOnPress` for LatchMods() Some keyboard layouts use `ISO_Level3_Latch` or `ISO_Level5_Latch` to define “built-in” dead keys: - they do not rely on the installation of custom Compose file; - they do not clash with other layouts. However, layout projects usually want the exact same behavior on all OS, but the XKB latch behavior (often misunderstood) also acts as a *set* modifier, which is not expected. The usual behavior of a dead key on Linux, macOS and Windows is: - latch on press; - deactivate as soon as another (non-modifier) key is pressed. Added the parameter `latchOnPress` to `LatchMods()` to enable the aforementioned behavior. As it is incompatible with X11, this feature is available only using the keymap text format v2. [XKB protocol key actions]: https://www.x.org/releases/current/doc/kbproto/xkbproto.html#Key_Actions
Pierre Le Marre c58c7df1 2025-06-17T21:05:08 Serialize multiple actions per level to VoidAction() in v1 format When using `XKB_KEYMAP_FORMAT_TEXT_V1`, multiple actions per level are now serialized using `VoidAction()`, in order to maintain compatibility with X11.
Pierre Le Marre 4f2fa718 2025-06-17T16:47:20 dump: Fix typo Fixed copy-paste error. It worked for now, as both struct have the same first fields, but it is obviously semantically incorrect and not future-proof.
Pierre Le Marre c2896b32 2025-06-12T09:16:54 messages: Add new error "incompatible-keymap-text-format"
Pierre Le Marre ee50e0c9 2025-06-12T20:14:50 keymap: Add option `unlockOnPress` for LockMods() It enables e.g. to deactivate CapsLock on press rather than on release, as in other platforms such as Windows. The specification of `LockMods()` is changed to: - On key *press*: - If `unlockOnPress` is true and some of the target modifiers were *locked* before the key press, then unlock them if `noUnlock` false. - Otherwise: - add target modifiers to *depressed* modifiers; - if `noLock` is false, add target modifiers to the *locked* modifiers. - On key *release*: - If `unlockOnPress` is true and triggered unlocking on key press, do nothing. - Otherwise: - remove modifiers from the *depressed* modifiers, if no other key that affect the same modifiers is down; - if `noUnlock` is false and if any target modifiers was locked before the key press, *unlock* them. It fixes a [12-year old issue] inherited from the X11 ecosystem, by extending the [XKB protocol key actions]. As it is incompatible with X11, this feature is available only using the keymap text format v2. [12-year old issue]: https://gitlab.freedesktop.org/xorg/xserver/-/issues/312 [XKB protocol key actions]: https://www.x.org/releases/current/doc/kbproto/xkbproto.html#Key_Actions
Pierre Le Marre d9d82355 2025-06-12T09:13:27 keymap: Add option `lockOnRelease` for LockGroup() It enables to use e.g. the combination `Control + Shift` *alone* to switch layouts, while keeping the use of `Control + Shift + other key` (typically for keyboard shortcuts). The specification of `LockGroup()` is changed to: - On key *press*: - If `lockOnRelease` is set, then key press has no effect. - Otherwise: - if the `group` is absolute, key press sets the *locked* keyboard group to `group`; - otherwise, key press adds `group` to the *locked* keyboard group. In either case, the resulting *locked* and *effective* group is brought back into range depending on the value of the `GroupsWrap` control for the keyboard. - On key *release*: - If `lockOnRelease` is not set, then key release has no effect. - Otherwise, if any other key was *pressed* after the locking key, then key release has no effect. - Otherwise, it has the same effect than a key press *without* `lockOnRelease` set. This is really useful for people coming from other platforms, such as Windows. It fixes a [20-year old issue] inherited from the X11 ecosystem, by extending the [XKB protocol key actions]. As it is incompatible with X11, this feature is available only using the keymap text format v2. [20-year old issue]: https://gitlab.freedesktop.org/xorg/xserver/-/issues/258 [XKB protocol key actions]: https://www.x.org/releases/current/doc/kbproto/xkbproto.html#Key_Actions
Pierre Le Marre 0106b357 2025-06-17T12:06:32 registry: Add rxkb_option_is_layout_specific() Enable to query if an option accepts layout index specifiers to restrict its application to the corresponding layouts.
Pierre Le Marre c4c531da 2025-06-17T11:43:50 rules: Add layout-specific options for RMLVO builder Change the signature of `xkb_rmlvo_builder_append_layout()` to accept an array of options. Also add tests for layout-specific options.
Pierre Le Marre fab9d25b 2025-06-17T11:43:22 rules: Add support for layout-specific options Enabled specifying a layout index for each option, so that it applies only if the layout matches. The layout index is specified by appending immediately after the option name the `!` specifier delimiter and then the layout index, in decimal form and 1-indexed. Note that `!` was chosen instead of the usual `:` specifier delimiter, because some options contains `:`, e.g. `grp:menu_toggle`. `!` *cannot* clash with component names, because `!` is a token in the rules files and thus cannot be used as in component names. It is also vaguely similar to `:`, compared to e.g. `@` or `#`. Example: given the following rules: ! layout[any] option = symbol * opt1 = +s1:%i l2 opt2 = +s2:%i it may result in the following configurations: | Layout | Option | Symbols | | -------- | -------- | ------------ | | `l1` | `opt1` | `+s1:1` | | `l2` | `opt1` | `+s1:1` | | `l1` | `opt2` | `` | | `l2` | `opt2` | `+s2:1` | | `l1,l2` | `opt1` | `+s1:1+s1:2` | | `l1,l2` | `opt1!1` | `+s1:1` | | `l1,l2` | `opt1!2` | `+s1:2` | | `l1,l2` | `opt2` | `+s2:2` | | `l1,l2` | `opt2!1` | `` | | `l1,l2` | `opt2!2` | `+s2:2` |
Pierre Le Marre 52a4d9b0 2025-06-17T11:03:12 rules: Require layout or variant to enable %i expansion Before this commit, the following rule would always match: ! model = symbols * = s:%i and set symbols to `s:1`, but the `:%i` is aimed to be used only when the rules header specifies the layout or the variant. Let’s be strict and disallow matching this kind of buggy rule. Emit an error message so that we can detect it.
Pierre Le Marre ef6a550f 2025-06-16T15:48:25 Add xkb_keymap_new_from_rmlvo() Use the new RMLVO builder API to compile keymaps.
Pierre Le Marre da5caabb 2025-06-16T15:45:42 Add RMLVO builder API Before this commit, the API to work with RMLVO was quite minimal: it only uses raw strings from the `xkb_rule_names` struct. However: - it forces the users to deal with error-prone string formatting; - it does not enforce tying together layouts and variants; - it limits adding new features by requiring defining delimiter characters and the corresponding parsing. Added the following API: - `xkb_rmlvo_builder_new()` - `xkb_rmlvo_builder_append_layout()` - `xkb_rmlvo_builder_append_option()` - `xkb_rmlvo_builder_unref()` There is no intermediate `layout` nor `option` object, in order to to keep the API simple. The only foreseen extension is enabling configuring layout-specific options.
Pierre Le Marre 2906c7ec 2025-06-14T13:19:41 rules: Fix parsing group index There was a typo that made parsing hexadecimal instead of the expected decimal format.
Pierre Le Marre 80b8d9d1 2025-06-10T17:34:15 dump: Adapt groups count to keymap format
Pierre Le Marre 62fe73cb 2025-06-10T17:33:14 parser: Raise the layout limit to 32
Pierre Le Marre 2535a3f9 2025-06-11T15:55:25 rules: Convert macros into enums & inline functions This provides semantics and better type-check.
Pierre Le Marre 9f3078eb 2025-06-10T15:46:31 dump: Use explicit format
Pierre Le Marre 0f89ad97 2025-06-09T19:26:13 dump: Always use numeric group indexes The upcoming raise of the maximum groups count will require to use numeric group indexes instead of the syntax `GroupN` if groups > 8. Let’s not bother with handling two cases (group count ≤ 8 or > 8) and always serialize group indexes as numeric values.
Pierre Le Marre 44c8deb2 2025-05-07T10:20:25 Introduce keymap format v2 and make it the default for parsing - Added `XKB_KEYMAP_FORMAT_TEXT_V2`. - Made `xkb_keymap_new_from_names()` use the new keymap format. - Made the tools default to the new keymap format for input. This is in preparation for changes in the parsing & state handling. For now it changes nothing.
Pierre Le Marre 08149dae 2025-05-06T16:23:04 Add internal API to query and parse supported keymap formats
Pierre Le Marre 1a10f858 2025-05-06T18:05:06 Add xkb_keymap_new_from_names2 This is just `xkb_keymap_new_from_names()` with an explicit keymap format.
Pierre Le Marre 16c079d6 2025-06-06T20:27:45 chore: Rename is_absolute to is_absolute_path
Pierre Le Marre 39b4b670 2025-06-06T18:40:29 Support including keymap components using %-expansion and absolute path Enable to use the same `include` features than *rules* files in *keymap components*: - *`%`-expansion*: `%H` home directory, `%S` sytem root and `%E` extra. - absolute file paths. This is useful if one wants to overwrite the system file with a user config (i.e. same name, but in `~/.config/xkb`), but still include the system file: ``` // File: ~/.config/xkb/symbols/de xkb_symbols "basic" { include "%S/de(basic)" key <AB01> { [z, Z] }; key <AD06> { [y, Y] }; } ```` Without the commit, using a mere `include "de(basic)"` would result in an include loop. Refactored by using the same code for rules and keymap components.
Pierre Le Marre 324984f1 2025-05-17T06:49:49 xkbcomp: Fix log for unknown default field
Pierre Le Marre e9394b9f 2025-05-13T10:47:22 utils: Use explicit cast to prevent warnings
Pierre Le Marre fb9fec18 2025-05-10T10:18:38 xkbcomp: Checked arithmetic Use a polyfill for C23 checked arithmetic. This is a bit paranoid, as we expect the user to use only 32 bit integers, so the signed 64 bit integer we use to store the result should be more than enough. Use jtckdint v1.0: - repository: https://github.com/jart/jtckdint - commit: 339450d13d8636f05dcb71ba36efddb226db481e - removed all C++-specific code
Jules Bertholet 7a2aa9c9 2024-12-20T22:53:11 Always retain later Compose sequence in case of conflict This ensures that it is always possible to override previous definitions, for example when `include`ing the system Compose file. Signed-off-by: Jules Bertholet <julesbertholet@quoi.xyz>
Pierre Le Marre 3a8bb1a1 2025-05-16T13:13:55 compose: Fix sequence not fully overriden Previously if a new sequence did not produce a keysym or a string, the corresponding property was not overriden, possibly leaking the previous entry. - Fixed by always writting all the properties. - Also try to reuse the previous string entry, if possible, so that we avoid allocating.
Pierre Le Marre 61d8ec67 2025-05-12T18:20:47 misc: Fix string format specifiers Ensure better portability.
Pierre Le Marre 3031f6c3 2025-05-12T10:38:15 misc: Always use `unsigned` with `int` Better semantics & facilitate search.
Pierre Le Marre 01742b77 2025-05-12T20:40:59 misc: Ensure explicit conversion in gperf code
Pierre Le Marre 556d00a0 2025-05-12T17:52:12 keymap: Ensure proper type for layouts count
Pierre Le Marre 3bfc1bc1 2025-05-12T18:52:05 misc: Ensure proper type for darray size
Pierre Le Marre 1d361b8f 2025-05-12T10:01:10 scanner: Ensure proper type for string length
Pierre Le Marre 13e7114d 2025-05-12T09:08:49 rules: Ensure proper type of MLVO and KcCGST indexes
Pierre Le Marre ac2aa2df 2025-05-12T07:47:03 keymap: Ensure proper type for LEDs count
Pierre Le Marre 903c16da 2025-05-12T07:42:32 keymap: Ensure proper type for key types counts
Pierre Le Marre c3953a96 2025-05-12T07:37:29 keymap: Ensure proper type for key codes aliases
Pierre Le Marre 2617ebc5 2025-05-12T07:32:04 keymap: Ensure proper type for modifiers count
Pierre Le Marre 41bb797d 2025-05-12T07:31:33 symbols: Ensure proper type for keysyms count
Pierre Le Marre f7c94bfc 2025-05-12T07:08:11 symbols: Ensure proper type for levels count
Pierre Le Marre 2f4d30c2 2025-05-12T07:07:50 context: Ensure proper type for include paths count
Pierre Le Marre 10457563 2025-05-12T06:41:28 keymap: Ensure proper type for actions count
Pierre Le Marre 3911f786 2025-05-12T07:06:42 keymap: Ensure proper type for num_sym_interprets
Pierre Le Marre 8f5270c0 2025-05-12T07:07:57 utils: Improve darray - Introduce `darray_size_t` - Document struct fields: the `alloc` field may be particularly confusing
Pierre Le Marre 9951184e 2025-05-10T10:15:54 actions: Properly reset type to NoAction on error If we do not reset the type, the action may lready have been initialized to with a default action and thus will not be ignored.
Pierre Le Marre 22d27277 2025-05-10T10:12:31 actions: Reject arguments if they are not expected `NoAction`, `VoidAction` and `TerminateServer` do not accept arguments.
Pierre Le Marre d239a3f0 2025-05-11T11:42:20 actions: Improve unsupported legacy X11 actions handling - Display a warning - Document drawbacks of degrading to `NoAction()`
Pierre Le Marre 137c5e90 2025-05-11T12:37:23 actions: Improve unknown action logging
Pierre Le Marre b4c89600 2025-05-09T15:15:10 actions: Add VoidAction(), mirroring NoSymbol/VoidSymbol. Added `VoidAction()` action to match the keysym pair `NoSymbol` / `VoidSymbol`. It enables overriding a previous action and breaks latches. This is a libxkbcommon extension. When serializing it will be converted to `LockControls(controls=none,affect=neither)` for backward compatibility. We cannot serialize it to `NoAction()`, as it would be dropped in e.g. the context of multiple actions.
Pierre Le Marre 845d2fee 2025-05-09T16:45:36 xkbcomp: Fix affect field wrongly accepted in SetControls() action
Pierre Le Marre 551cca2a 2024-12-03T10:12:03 state: Add server API for updating latched and locked mods & layout Up to now, the “server state” `xkb_state` API only offered one entry point to update the server state – `xkb_state_update_key`, which reflects the direct keyboard keys state. But some updates come out-of-band from keyboard input events stream, for example, a GUI layout switcher. The X11 XKB protocol has a request which allows for such updates, `XkbLatchLockState`[^1], but xkbcommon does not have similar functionality. So server applications ended up using `xkb_state_update_state` for this, but that’s a function intended for client applications, not servers. Add support for updating the latched & locked state of the mods and layout. Note that the depressed states cannot be updated in this way -- XKB does not expect them to be updated out of band. [^1]: https://www.x.org/releases/X11R7.7/doc/kbproto/xkbproto.html#Querying_and_Changing_Keyboard_State Fixes: #310 Signed-off-by: Ran Benita <ran@unusedvar.com> Co-authored-by: Ran Benita <ran@unusedvar.com> Co-authored-by: Pierre Le Marre <dev@wismill.eu>
Pierre Le Marre 662ce937 2024-12-03T10:09:10 state: Avoid keycode lookup when key ref is available
Pierre Le Marre 7cd1180b 2025-05-06T11:07:47 modifiers: Add xkb_keymap_mod_get_mask() Added a dedicated API to query modifier masks rather than relying on a hack using `xkb_state_update_mask` and `xkb_state_serialize_mods`. Furthermore, this hack may not work in the future if we remove virtual mods resolution in `xkb_state_update_mask` to avoid corner-cases issues.
Ran Benita a3f1a9d3 2025-02-04T20:45:38 xkbcomp/parser: enable Bison detailed syntax error It's not much, but instead of xkbcommon: ERROR: [XKB-769] (unknown file):5:25: syntax error we get xkbcommon: ERROR: [XKB-769] (unknown file):5:25: syntax error, unexpected +, expecting INTEGER which is at least a little helpful. Signed-off-by: Ran Benita <ran@unusedvar.com>
Ran Benita e6aec067 2025-04-29T17:14:01 build: drop support for byacc It doesn't support `%define parse.error detailed` which we want to use. If needed, we can probably bring back support using some macro hackery. Signed-off-by: Ran Benita <ran@unusedvar.com>
Pierre Le Marre c2d3694b 2025-05-06T07:01:01 xkbcomp: Do not discard extra bits in vmod masks Since we accept numeric values for the vmod mask in the keymap, we may have extra bits set that encode *no* real/virtual modifier. Keep them unchanged for consistency. E.g. the following keymap: xkb_keymap { xkb_keycodes { <a> = 38; }; xkb_symbols { virtual_modifiers X = 0xf0000000; key <a> { [ SetMods(mods = 0x00001100) ] }; }; }; would compile to: xkb_keymap { xkb_keycodes { <a> = 38; }; xkb_symbols { virtual_modifiers X = 0xf0000000; // Internal state key <a> { [ SetMods(mods = 0xf0001000) ] }; // Serialization key <a> { [ SetMods(mods = 0x00001100) ] }; }; };
Pierre Le Marre dddffd51 2025-05-05T13:22:57 state: Fix virtual modifiers with non-real mod mapping Currently there are 2 issues with the handling of virtual modifiers in the keyboard state: 1. We assume that the input modifiers masks encode the indexes of all the modifiers of the keymap, but this is true only for the *real* modifiers (at least in xkbcommon and X11). Indeed, since the virtual modifiers *indexes* are implementation-specific, the input modifier masks merely *encode* the modifiers via their *mapping*. Consider the following keymap: ```c xkb_keymap { xkb_compat { virtual_modifiers M1 = 0x100; }; xkb_types { virtual_modifiers M2 = 0x200; }; }; ``` Now to illustrate, consider the following 2 implementation variants of libxkbcommon (assuming indexes 0-7 are the usual real modifiers): 1. Process `xkb_compat` then `xkb_types`. M1 and M2 have the respective indexes 8 and 9 and map to themselves (with the current assumption about mask denotation). 2. Process `xkb_types` then `xkb_compat`. M1 and M2 have the respective indexes 9 and 8 and map to each other. With the current `xkb_state_update_mask`, implementation 2 will swap M1 and M2 (compared to impl. 1) at each update! Indeed, we can see that `xkb_state_serialize_mods` doesn’t roundtrip via `xkb_state_update_mask`. 2. We assume that modifier masks use only bits denoting modifiers in the keymap, but when parsing the keymap we accept explicit virtual modifiers mapping of arbitrary values. E.g. if `M1` is the only virtual modifier and it is defined by: ```c virtual_modifiers M1 = 0x80000000; // 1 << (32 - 1) ``` then the 32th bit of a modifier mask input does *not* denote the 32th virtual modifier of the keymap, but merely the encoding of the mapping of `M1`. So when calling `xkb_state_update_mask`, we may discard some bits of the modifiers masks and end up with an incorrect state. These 2 issues may break interoperability with other implementations of XKB (e.g. kbvm) and make pure virtual modifiers handling fragile. We introduce the notion of *canonical state modifier mask*: the mask with the smallest population count that denotes all bits used to encode the modifiers in the keyboard state. It is equal to the bitwise OR of real modifiers mask and all the virtual modifiers mappings. This commit fixes the 2 issues by making *weaker* assumptions about the input modifier masks: 1. Modifiers may map to arbitrary values, not only real modifiers. 2. Input modifier masks merely encode modifiers via their *mapping*: - *real* modifiers map to themselves; - *virtual* modifiers map to the bitwise OR of their *explicit* mapping (via `virtual_modifiers`) and their *implicit* mapping (via keys’ real and virtual modmaps). - modifiers indexes are implementation-specific. Since the implementation before this commit also resolved virtual modifiers to their mappings, we continue doing so, but using only the bits that are *not* set in the canonical state modifier mask, so that we enable roundtrip of `xkb_state_serialize_mods` via `xkb_state_update_mask`. 3. Input modifier masks do not denote modifiers indexes (apart from real modifiers), so it is safe to discard only the bits that are not set in the canonical state modifier mask.
Pierre Le Marre d5b779e1 2025-05-06T21:07:28 keymap: Fix empty compat interpretation map serialization X11’s `xkbcomp` requires at least one compat interpretation entry.
Pierre Le Marre 87f9ac76 2025-05-06T21:02:23 keymap: Fix empty compat interpretation statement serialization Statements such as `interpret VoidSymbol {};` can cannot be parsed by X11’s `xkbcomp`. Fixed by using a dummy action.
Pierre Le Marre 230b6a6a 2025-05-06T14:35:26 Fix key type map entry with unbound vmod not ignored Currently we only ignore key type map entries with non-zero mods and with a zero modifier mask. However, the XKB protocol states ([source]): > Map entries which specify unbound virtual modifiers are not considered. So we currently handle `map[Unbound]` key type map entries (all modifiers unbound) but not `map[Bound+Unbound]` entries (mix of bound and unbound modifiers). Fixed by properly checking unbound modifiers on each key type map entry. This also fixes a test that was accidentally passing. [source]: https://www.x.org/releases/X11R7.7/doc/kbproto/xkbproto.html#:~:text=Map%20entries%20which%20specify%20unbound%20virtual%20modifiers,not%20considered
Pierre Le Marre f8148744 2025-05-06T11:26:21 Define the mapping of real modifiers explicitly When querying for a modifier mapping, we should treat all modifiers equally. So simply store real modifier mapping as we do for the virtual ones. Also fixed useless boolean conversions.
Pierre Le Marre e1aca42e 2025-05-05T12:06:18 state: Minor refactor - Move variable declaration close to their use. - Make them constant whenever possible.
Pierre Le Marre 8bc60ee3 2025-05-05T13:20:45 modifiers: Minor optimization It has low impact, but it also adds better semantics.
Pierre Le Marre cd512b8f 2025-05-02T19:21:09 x11: Fix capitalization transformation
Pierre Le Marre 411e9a6f 2025-04-28T06:56:19 ExprKeySym: add comment about error recovery
Pierre Le Marre 76683d92 2025-04-29T11:37:46 symbols: Fix clang-tidy false positive
Pierre Le Marre 95c5c859 2025-03-25T05:50:02 xkbcomp: Quote erroneous field in logging
Pierre Le Marre d66a65c2 2025-03-20T17:34:07 xkbcomp: Consistent keycodes logging
Pierre Le Marre 9b0b8c68 2025-04-15T19:53:28 xkbcomp: Stricter handling of default map include Before this commit, including a *default* map, i.e. without an explicit section name (e.g. `include "au"` vs `include "au(basic)"`) would match the first section of the first matching file in the XKB include paths, even if this section is not an *explicit* default map (i.e. tagged with `default`) but an *implicit* default map (i.e. the first map of the file, i.e. a weak match). It makes user configuration risky: say a user wants to create a custom version `au(custom)` of the `au` layout: - `./config/xkb/symbols/au`: custom layout in section “custom”. - `/usr/share/X11/xkb/symbols/au`: system layout, with *default* section “basic”. In this setup *any* layout that imports the default map from `au` would in fact import the *implicit* default map `au(custom)` instead of the *explicit* default map `au(basic)`. This incorrect behavior may thus break setups with multiple layouts. This is especially true for symbols files such as: `pc`, `us` or `latin`. Fixed by trying harder to found the exact default map, defaulting to the old behavior (weak match) only if no *explicit* default map (exact match) has been found in the XKB include paths.
Pierre Le Marre 9ede705b 2025-04-13T09:50:18 state: Capitalization transformation in xkb_state_key_get_syms Previously `xkb_state_key_get_syms()` did not perform capitalization tranformation, while `xkb_state_key_get_one_sym()` does perform it. This is unfortunate if we want to promote the use of multiple keysyms per levels. The API make it difficult to change now though: we return a pointer to an immutable array rather than filling a buffer. While we could use an internal buffer in `xkb_state`, this option would limit the API to *sequential* calls of `xkb_state_key_get_syms()` or require some buffer handling (e.g. rotation). Instead we now store the capitalization directly in `xkb_level`. We modified `xkb_level` like so (see below for discussion about the size): ```diff struct xkb_level { - unsigned int num_syms; + uint16_t num_syms; - unsigned int num_actions; + uint16_t num_actions; + union { + /** num_syms == 1: Upper keysym */ + xkb_keysym_t upper; + /** num_syms > 1: Indicate if `syms` contains the upper case + * keysyms after the lower ones. */ + bool has_upper; + }; union { xkb_keysym_t sym; /* num_syms == 1 */ xkb_keysym_t *syms; /* num_syms > 1 */ } s; union { union xkb_action action; /* num_actions == 1 */ union xkb_action *actions; /* num_actions > 1 */ } a; }; ``` - When `level.num_syms` <= 1, we store the upper keysym in `level.upper`. - Else if there no cased syms, we set `level.has_upper` to false. - Else if there are some cased syms, we set `level.has_upper`` to `true` and we double the original size of `level.s.syms`, but *without* modifying `level.num_syms`. We then append the transformed keysyms right after the original ones, so that we can access them by a simple pointer operation: `level.s.syms + level.num_syms`. The memory footprint is *unchanged*, thanks to the reduced fields for actions and keysyms counts.
Pierre Le Marre 9e93e5e5 2025-04-13T10:25:02 symbols: Restrict the number of actions and keysyms per level In preparation to support capitalization in `xkb_state_key_get_syms()`, this commit reduces the number of supported actions and keysyms per level, going from UINT_MAX to UINT16_MAX. This is most likely still more than enough and could be even reduced further, but deemed unnecessary at the moment: alignment of `struct xkb_level` is driven by the fields `a` and `s`. - Switched the item count type from `unsigned int` to `uint16_t`. - Introduced `xkb_{action,keysym}_count_t` type for the respective item count for exact typing. - Added relevant bounds checks.
Pierre Le Marre 44bcdb73 2025-04-13T10:24:13 symbols: Avoid keysyms allocation by stealing darray
Pierre Le Marre 53d80b87 2025-03-20T15:29:17 xkbcomp: Safer keycode max_key_code Since we now always keep the keycodes array at the minimal dimensions, `max_key_code` is redundant and error prone. Let’s use `darray_size` directly.
Pierre Le Marre 256be1ea 2025-03-25T08:13:21 xkbcomp: Fix merge mode for defaults actions - Keep defaults local: do not share accross includes. - Do not allocate default actions.
Pierre Le Marre b1865376 2025-03-25T07:46:11 xkbcomp: Fix merge mode for defaults in symbols
Pierre Le Marre a629aa84 2025-03-25T05:49:04 xkbcomp: Fix merge mode for defaults in compat
Pierre Le Marre af5296cf 2025-03-19T13:11:35 xkbcomp: Fix virtual mods merge modes
Pierre Le Marre 06c024e0 2025-03-19T13:11:35 xkbcomp: Fix merge modes Fix various issues with merge mode handling: - Invalid initialization - Invalid merge mode inherited from keymap - Do not leak local merge mode
Pierre Le Marre a1e595e7 2025-04-11T11:13:25 rules: Fix merging KcCGST values in layout order When using layout index ranges (e.g. special indexes “any” or “later”), the rules still match following the order in the rules file, so layout indexes may match without following their natural order. So the resulting KcCGST value should not be merged with the output until reaching the end of the rule set. Because the rule set may also involve options, it may match multiple times for the *same* layout index. So these multiple matches should not be merged together either, until reaching the end of the rule set. When reaching the end of the rule set, for each KcCGST component the pending values are then merged: for each layout, for each KcCGST value in the corresponding sequence, merge with the output. --- Example: ! model = symbols * = pc ! layout[any] option = symbols C 1 = +c1:%i C 2 = +c2:%i B 3 = skip B 4 = +b:%i The result of RMLVO {layout: "A,B,C", options: "4,3,2,1"} is: symbols = pc+b:2+c1:3+c2:3 - `skip` was dropped because it has no explicit merge mode; - although every rule was matched in order, the resulting order of the symbols follows the order of the layouts, so `+b` appears before `+c1` and `+c2`. - the relative order of the options for layout C follows the order within the rule set, not the order of RMLVO. Before this commit, the result would have been: symbols = pc+c1:3+c2:3+b:2
Pierre Le Marre 66f71890 2025-03-31T08:01:29 symbols: Enable writing keysyms list as UTF-8 strings Each Unicode code point of the string will be translated to their respective keysym, if possible. An empty string denotes `NoSymbol`. When such conversion is not possible, this will raise a syntax error. This introduces the following syntax: ```c // Empty string = `NoSymbol` key <1> {[""]}; // NoSymbol // Single code point = single keysym key <2> {["é"]}; // eacute // String = translate each code point to their respective keysym key <3> {["sßξك🎺"]}; // {s, ssharp, Greek_xi, Arabic_kaf, U1F3BA} // Mix string and keysyms key <4> {[{"ξ", Greek_kappa, "β"}]}; // { Greek_xi, Greek_kappa, Greek_beta} ``` It can also be used wherever a keysym is required, e.g. in `interpret` and `modifier_map` statements. In these cases a single keysym is expected, so the string should contain *exactly one* Unicode code point.
Pierre Le Marre ead3ce77 2025-03-28T21:44:27 scanner: Enable LRM and RLM marks for BiDi text Enable displaying bidirectional text in XKB files using: - U+200E LEFT-TO-RIGHT MARK - U+200F RIGHT-TO-LEFT MARK We now parse these marks as white space. As such, they are dropped; note that a later serialization may not display correctly without the marks, although it will parse. References: - https://www.w3.org/International/articles/inline-bidi-markup/uba-basics - https://www.w3.org/International/questions/qa-bidi-unicode-controls - https://www.unicode.org/reports/tr31/#Whitespace - https://www.unicode.org/reports/tr55/
Pierre Le Marre bc3e464b 2025-04-09T12:35:05 keysyms: Fix Unicode handling - `xkb_utf32_to_keysym`: Allow [Unicode noncharacters]. There is no requirement to drop them and this would be the only function of our API doing so. From the Unicode Standard 16.0, section 23.7 “Noncharacters”: > Applications are free to use any of these noncharacter code points > internally. They have no standard interpretation when exchanged > outside the context of internal use. However, they are not illegal > in interchange, nor does their presence cause Unicode text to be > ill-formed. > If a noncharacter is received in open interchange, an application is > not required to interpret it in any way. It is good practice, > however, to recognize it as a noncharacter and to take appropriate > action, such as replacing it with `U+FFFD` REPLACEMENT CHARACTER, > to indicate the problem in the text. The key part is: > an application is not required to interpret it in any way Since we handle the reverse conversion with `xkb_keysym_to_utf32` just fine, I do not see a good motivation to keep this asymmetry. This is the only function with a special case for these code points. - `xkb_keysym_from_name`: - Unicode format `UNNNN`: allow control characters C0 and C1 and use `xkb_utf32_to_keysym` for the conversion when `NNNN < 0x100`, for backward compatibility. - Numeric hexadecimal format `0xNNNN`: *unchanged*. Contrary to the Unicode format, it does not normalize any keysym values in order to enable roundtrip with `xkb_keysym_get_name`. Also added tests to ensure various properties and consistency. Note about *surrogates*: they are valid valid *code points* but invalid Unicode *scalar values*, i.e. they cannot be encoded in any Unicode encoding form (UTF-8, UTF-16, UTF-32). So their corresponding Unicode keysyms are valid, but: - cannot be used as input of `xkb_keysym_to_utf32` nor `xkb_keysym_to_utf8` - cannot result as output of `xkb_utf32_to_keysym`. Otherwise they are valid e.g. in the Unicode keysym notation. [Unicode noncharacters]: https://en.wikipedia.org/wiki/Universal_Character_Set_characters#Noncharacters
Pierre Le Marre 08d9a031 2025-04-08T06:31:33 Unicode: Make surrogate handling more explicit
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