Add Post Processing to process_record (#4892)
* Improve process_record system Code based on @colinta's * Rename and better handle functions * Fix incorrect function call to process_record_user * Add documentation for post_process_record * Add both get_event_keycode and get_record_keycode functions And add some comments about these functions * Update code format * Cleanup merge artifacts
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6 changed files with 77 additions and 4 deletions
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@ -88,6 +88,46 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
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};
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```
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### Advanced Macros
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In addition to the `process_record_user()` function, is the `post_process_record_user()` function. This runs after `process_record` and can be used to do things after a keystroke has been sent. This is useful if you want to have a key pressed before and released after a normal key, for instance.
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In this example, we modify most normal keypresses so that `F22` is pressed before the keystroke is normally sent, and release it __only after__ it's been released.
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```c
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static uint8_t f22_tracker;
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bool process_record_user(uint16_t keycode, keyrecord_t *record) {
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switch (keycode) {
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case KC_A ... KC_F21: //notice how it skips over F22
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case KC_F23 ... KC_EXSEL: //exsel is the last one before the modifier keys
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if (record->event.pressed) {
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register_code(KC_F22); //this means to send F22 down
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f22_tracker++;
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register_code(keycode);
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return false;
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}
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break;
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}
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return true;
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}
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void post_process_record_user(uint16_t keycode, keyrecord_t *record) {
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switch (keycode) {
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case KC_A ... KC_F21: //notice how it skips over F22
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case KC_F23 ... KC_EXSEL: //exsel is the last one before the modifier keys
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if (!record->event.pressed) {
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f22_tracker--;
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if (!f22_tracker) {
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unregister_code(KC_F22); //this means to send F22 up
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}
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}
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break;
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}
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}
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```
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### TAP, DOWN and UP
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You may want to use keys in your macros that you can't write down, such as `Ctrl` or `Home`.
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@ -162,6 +162,15 @@ The `process_record()` function itself is deceptively simple, but hidden within
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At any step during this chain of events a function (such as `process_record_kb()`) can `return false` to halt all further processing.
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After this is called, `post_process_record()` is called, which can be used to handle additional cleanup that needs to be run after the keycode is normally handled.
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* [`void post_process_record(keyrecord_t *record)`]()
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* [`void post_process_record_quantum(keyrecord_t *record)`]()
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* [Map this record to a keycode]()
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* [`void post_process_clicky(uint16_t keycode, keyrecord_t *record)`]()
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* [`void post_process_record_kb(uint16_t keycode, keyrecord_t *record)`]()
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* [`void post_process_record_user(uint16_t keycode, keyrecord_t *record)`]()
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<!--
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#### Mouse Handling
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@ -120,6 +120,14 @@ __attribute__((weak)) bool process_record_kb(uint16_t keycode, keyrecord_t *reco
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__attribute__((weak)) bool process_record_user(uint16_t keycode, keyrecord_t *record) { return true; }
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__attribute__ ((weak))
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void post_process_record_kb(uint16_t keycode, keyrecord_t *record) {
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post_process_record_user(keycode, record);
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}
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__attribute__ ((weak))
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void post_process_record_user(uint16_t keycode, keyrecord_t *record) {}
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void reset_keyboard(void) {
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clear_keyboard();
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#if defined(MIDI_ENABLE) && defined(MIDI_BASIC)
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@ -172,9 +180,15 @@ uint16_t get_event_keycode(keyevent_t event) {
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return keymap_key_to_keycode(layer_switch_get_layer(event.key), event.key);
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}
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/* Main keycode processing function. Hands off handling to other functions,
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* then processes internal Quantum keycodes, then processes ACTIONs.
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*/
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/* Get keycode, and then call keyboard function */
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void post_process_record_quantum(keyrecord_t *record) {
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uint16_t keycode = get_record_keycode(record);
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post_process_record_kb(keycode, record);
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}
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/* Core keycode function, hands off handling to other functions,
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then processes internal quantum keycodes, and then processes
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ACTIONs. */
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bool process_record_quantum(keyrecord_t *record) {
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uint16_t keycode = get_record_keycode(record);
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@ -257,6 +257,8 @@ uint16_t get_event_keycode(keyevent_t event);
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bool process_action_kb(keyrecord_t *record);
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bool process_record_kb(uint16_t keycode, keyrecord_t *record);
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bool process_record_user(uint16_t keycode, keyrecord_t *record);
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void post_process_record_kb(uint16_t keycode, keyrecord_t *record);
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void post_process_record_user(uint16_t keycode, keyrecord_t *record);
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#ifndef BOOTMAGIC_LITE_COLUMN
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# define BOOTMAGIC_LITE_COLUMN 0
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@ -151,6 +151,8 @@ void process_record_nocache(keyrecord_t *record) { process_record(record); }
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__attribute__((weak)) bool process_record_quantum(keyrecord_t *record) { return true; }
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__attribute__((weak)) void post_process_record_quantum(keyrecord_t *record) {}
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#ifndef NO_ACTION_TAPPING
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/** \brief Allows for handling tap-hold actions immediately instead of waiting for TAPPING_TERM or another keypress.
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*
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@ -185,6 +187,11 @@ void process_record(keyrecord_t *record) {
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if (!process_record_quantum(record)) return;
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process_record_handler(record);
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post_process_record_quantum(record);
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}
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void process_record_handler(keyrecord_t *record) {
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action_t action = store_or_get_action(record->event.pressed, record->event.key);
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dprint("ACTION: ");
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debug_action(action);
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@ -988,7 +995,6 @@ bool is_tap_action(action_t action) {
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* FIXME: Needs documentation.
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*/
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void debug_event(keyevent_t event) { dprintf("%04X%c(%u)", (event.key.row << 8 | event.key.col), (event.pressed ? 'd' : 'u'), event.time); }
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/** \brief Debug print (FIXME: Needs better description)
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*
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* FIXME: Needs documentation.
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@ -84,6 +84,8 @@ void process_hand_swap(keyevent_t *record);
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void process_record_nocache(keyrecord_t *record);
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void process_record(keyrecord_t *record);
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void process_record_handler(keyrecord_t *record);
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void post_process_record_quantum(keyrecord_t *record);
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void process_action(keyrecord_t *record, action_t action);
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void register_code(uint8_t code);
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void unregister_code(uint8_t code);
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