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With a little help from your OS, practically any Unicode character can be input using your keyboard.
There are some limitations to this feature. Because there is no "standard" method of Unicode input across all operating systems, each of them require their own setup process on both the host and in the firmware, which may involve installation of additional software. This also means Unicode input will not "just work" when the keyboard is plugged into another device.
The core Unicode API can be used purely programmatically. However, there are also additional subsystems which build on top of it and come with keycodes to make things easier. See below for more details.
To start, add the following to your keymap's rules.mk:
UNICODE_COMMON = yesThe following options can be set or overridden in your config.h:
| Define | Default | Description |
|---|---|---|
UNICODE_KEY_MAC | KC_LEFT_ALT | The key to hold when beginning a Unicode sequence with the macOS input mode |
UNICODE_KEY_LNX | LCTL(LSFT(KC_U)) | The key to tap when beginning a Unicode sequence with the Linux input mode |
UNICODE_KEY_WINC | KC_RIGHT_ALT | The key to hold when beginning a Unicode sequence with the WinCompose input mode |
UNICODE_SELECTED_MODES | n/a | A comma separated list of input modes for cycling through |
UNICODE_CYCLE_PERSIST | true | Whether to persist the current Unicode input mode to EEPROM |
UNICODE_TYPE_DELAY | 10 | The amount of time to wait, in milliseconds, between Unicode sequence keystrokes |
The default values work well for most use cases, so users usually only need to define UNICODE_SELECTED_MODES to set their desired input modes. However, if you plan on switching input modes manually (see keycodes below) and don't plan on cycling through them, this definition can be omitted.
If you have the Audio feature enabled on your board, you can configure it to play sounds when the input mode is changed.
Add one or more of the following definitions to your config.h:
| Define | Default | Description |
|---|---|---|
UNICODE_SONG_MAC | n/a | The song to play when the macOS input mode is selected |
UNICODE_SONG_LNX | n/a | The song to play when the Linux input mode is selected |
UNICODE_SONG_BSD | n/a | The song to play when the BSD input mode is selected |
UNICODE_SONG_WIN | n/a | The song to play when the Windows input mode is selected |
UNICODE_SONG_WINC | n/a | The song to play when the WinCompose input mode is selected |
Each of these subsystems have their own pros and cons in terms of flexibility and ease of use. Choose the one that best fits your needs.
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style: { "--shiki-light": "#6A737D", "--shiki-dark": "#6A737D" } }, " // 🇺🇦") ]), createTextVNode("\n"), createBaseVNode("span", { class: "line" }, [ createBaseVNode("span", { style: { "--shiki-light": "#6F42C1", "--shiki-dark": "#B392F0" } }, " UCIS_SYM"), createBaseVNode("span", { style: { "--shiki-light": "#24292E", "--shiki-dark": "#E1E4E8" } }, "("), createBaseVNode("span", { style: { "--shiki-light": "#032F62", "--shiki-dark": "#9ECBFF" } }, '"look"'), createBaseVNode("span", { style: { "--shiki-light": "#24292E", "--shiki-dark": "#E1E4E8" } }, ", "), createBaseVNode("span", { style: { "--shiki-light": "#D73A49", "--shiki-dark": "#F97583" } }, "0x"), createBaseVNode("span", { style: { "--shiki-light": "#005CC5", "--shiki-dark": "#79B8FF" } }, "0CA0"), createBaseVNode("span", { style: { "--shiki-light": "#24292E", "--shiki-dark": "#E1E4E8" } }, ", "), createBaseVNode("span", { style: { "--shiki-light": "#D73A49", "--shiki-dark": "#F97583" } }, "0x"), createBaseVNode("span", { style: { "--shiki-light": "#005CC5", "--shiki-dark": "#79B8FF" } }, "005F"), createBaseVNode("span", { style: { "--shiki-light": "#24292E", "--shiki-dark": "#E1E4E8" } }, ", "), createBaseVNode("span", { style: { "--shiki-light": "#D73A49", "--shiki-dark": "#F97583" } }, "0x"), createBaseVNode("span", { style: { "--shiki-light": "#005CC5", "--shiki-dark": "#79B8FF" } }, "0CA0"), createBaseVNode("span", { style: { "--shiki-light": "#24292E", "--shiki-dark": "#E1E4E8" } }, ")"), createBaseVNode("span", { style: { "--shiki-light": "#6A737D", "--shiki-dark": "#6A737D" } }, " // ಠ_ಠ") ]), createTextVNode("\n"), createBaseVNode("span", { class: "line" }, [ createBaseVNode("span", { style: { "--shiki-light": "#24292E", "--shiki-dark": "#E1E4E8" } }, ");") ]) ]) ]) ], -1), createBaseVNode("p", null, [ createTextVNode("By default, each table entry may be up to three code points long. This can be changed by adding "), createBaseVNode("code", null, "#define UCIS_MAX_CODE_POINTS n"), createTextVNode(" to your keymap's "), createBaseVNode("code", null, "config.h"), createTextVNode(".") ], -1), createBaseVNode("p", null, [ createTextVNode("To invoke UCIS input, the "), createBaseVNode("code", null, "ucis_start()"), createTextVNode(' function must first be called (for example, in a custom "Unicode" keycode). Then, type the mnemonic for the mapping table entry (such as "rofl"), and hit Space or Enter. The "rofl" text will be backspaced and the emoji inserted.') ], -1) ])]), _: 1 }) ]), _: 1 }), _cache[10] || (_cache[10] = createStaticVNode('Unicode input works by typing a sequence of characters, similar to a macro. However, since this sequence depends on your OS, you will need to prepare both your host machine and QMK to recognise and send the correct Unicode input sequences respectively.
To set the list of enabled input modes, add the UNICODE_SELECTED_MODES define to your keymap's config.h, for example:
#define UNICODE_SELECTED_MODES UNICODE_MODE_LINUX\n// or\n#define UNICODE_SELECTED_MODES UNICODE_MODE_MACOS, UNICODE_MODE_WINCOMPOSEThese modes can then be cycled through using the UC_NEXT and UC_PREV keycodes. You can also switch to any input mode, even if it is not specified in UNICODE_SELECTED_MODES, using their respective keycodes.
If your keyboard has working EEPROM, it will remember the last used input mode and continue using it on the next power up. This can be disabled by defining UNICODE_CYCLE_PERSIST to false.
| Key | Aliases | Description |
|---|---|---|
UC(c) | Send Unicode code point c, up to 0x7FFF | |
UM(i) | Send Unicode code point at index i in unicode_map | |
UP(i, j) | Send Unicode code point at index i, or j if Shift/Caps is on | |
QK_UNICODE_MODE_NEXT | UC_NEXT | Cycle through selected input modes |
QK_UNICODE_MODE_PREVIOUS | UC_PREV | Cycle through selected input modes in reverse |
QK_UNICODE_MODE_MACOS | UC_MAC | Switch to macOS input |
QK_UNICODE_MODE_LINUX | UC_LINX | Switch to Linux input |
QK_UNICODE_MODE_WINDOWS | UC_WIN | Switch to Windows input |
QK_UNICODE_MODE_BSD | UC_BSD | Switch to BSD input (not implemented) |
QK_UNICODE_MODE_WINCOMPOSE | UC_WINC | Switch to Windows input using WinCompose |
QK_UNICODE_MODE_EMACS | UC_EMAC | Switch to emacs (C-x-8 RET) |
uint8_t get_unicode_input_mode(void) Get the current Unicode input mode.
The currently active Unicode input mode.
void set_unicode_input_mode(uint8_t mode) Set the Unicode input mode.
uint8_t modevoid unicode_input_mode_step(void) Change to the next Unicode input mode.
void unicode_input_mode_step_reverse(void) Change to the previous Unicode input mode.
void unicode_input_mode_set_user(uint8_t input_mode) User-level callback, invoked when the input mode is changed.
uint8_t input_modevoid unicode_input_mode_set_kb(uint8_t input_mode) Keyboard-level callback, invoked when the input mode is changed.
uint8_t input_modevoid unicode_input_start(void) Begin the Unicode input sequence. The exact behavior depends on the currently selected input mode:
UNICODE_KEY_MACUNICODE_KEY_LNXUNICODE_KEY_WINC, then UThis function is weakly defined, and can be overridden in user code.
void unicode_input_finish(void) Complete the Unicode input sequence. The exact behavior depends on the currently selected input mode:
UNICODE_KEY_MACThis function is weakly defined, and can be overridden in user code.
void unicode_input_cancel(void) Cancel the Unicode input sequence. The exact behavior depends on the currently selected input mode:
UNICODE_KEY_MACThis function is weakly defined, and can be overridden in user code.
void register_unicode(uint32_t code_point) Input a single Unicode character. A surrogate pair will be sent if required by the input mode.
uint32_t code_pointvoid send_unicode_string(const char *str) Send a string containing Unicode characters.
const char *struint8_t unicodemap_index(uint16_t keycode) Get the index into the unicode_map array for the given keycode, respecting shift state for pair keycodes.
uint16_t keycodeAn index into the unicode_map array.
uint32_t unicodemap_get_code_point(uint8_t index) Get the code point for the given index in the unicode_map array.
uint8_t indexunicode_map array.A Unicode code point value.
void register_unicodemap(uint8_t index) Send the code point for the given index in the unicode_map array.
uint8_t indexunicode_map array.void ucis_start(void) Begin the input sequence.
bool ucis_active(void) Whether UCIS is currently active.
true if UCIS is active.
uint8_t ucis_count(void) Get the number of characters in the input sequence buffer.
The current input sequence buffer length.
bool ucis_add(uint16_t keycode) Add the given keycode to the input sequence buffer.
uint16_t keycodeKC_A and KC_Z, or KC_1 and KC_0.true if the keycode was added.
bool ucis_remove_last(void) Remove the last character from the input sequence buffer.
true if the sequence was not empty.
void ucis_finish(void) Mark the input sequence as complete, and attempt to match.
void ucis_cancel(void) Cancel the input sequence.
void register_ucis(void) Send the code point(s) for the given UCIS index.
uint8_t index