Implement the dynamic macros that are recorded in runtime
Wojciech Siewierski
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cc7acfb416
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/* Author: Wojciech Siewierski < wojciech dot siewierski at onet dot pl > */
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#ifndef DYNAMIC_MACROS_H
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#define DYNAMIC_MACROS_H
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#include "action_layer.h"
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#ifndef DYNAMIC_MACRO_SIZE
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/* May be overridden with a custom value. Be aware that the effective
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* macro length is half of this value: each keypress is recorded twice
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* because of the down-event and up-event. This is not a bug, it's the
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* intended behavior. */
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#define DYNAMIC_MACRO_SIZE 256
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#endif
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/* DYNAMIC_MACRO_RANGE must be set as the last element of user's
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* "planck_keycodes" enum prior to including this header. This allows
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* us to 'extend' it.
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*/
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enum dynamic_macro_keycodes {
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DYN_REC_START1 = DYNAMIC_MACRO_RANGE,
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DYN_REC_START2,
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DYN_MACRO_PLAY1,
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DYN_MACRO_PLAY2,
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};
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/* Blink the LEDs to notify the user about some event. */
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void dynamic_macro_led_blink(void)
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{
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backlight_toggle();
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_delay_ms(100);
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backlight_toggle();
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}
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/**
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* Start recording of the dynamic macro.
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*
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* @param[out] macro_pointer The new macro buffer iterator.
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* @param[in] macro_buffer The macro buffer used to initialize macro_pointer.
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*/
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void dynamic_macro_record_start(
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keyrecord_t **macro_pointer, keyrecord_t *macro_buffer)
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{
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dynamic_macro_led_blink();
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clear_keyboard();
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layer_clear();
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*macro_pointer = macro_buffer;
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}
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/**
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* Play the dynamic macro.
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*
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* @param macro_buffer[in] The beginning of the macro buffer being played.
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* @param macro_end[in] The element after the last macro buffer element.
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* @param direction[in] Either +1 or -1, which way to iterate the buffer.
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*/
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void dynamic_macro_play(
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keyrecord_t *macro_buffer, keyrecord_t *macro_end, int8_t direction)
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{
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uint32_t saved_layer_state = layer_state;
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clear_keyboard();
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layer_clear();
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while (macro_buffer != macro_end) {
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process_record(macro_buffer);
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macro_buffer += direction;
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}
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clear_keyboard();
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layer_state = saved_layer_state;
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}
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/**
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* Record a single key in a dynamic macro.
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*
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* @param macro_pointer[in,out] The current buffer position.
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* @param macro_end2[in] The end of the other macro which shouldn't be overwritten.
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* @param direction[in] Either +1 or -1, which way to iterate the buffer.
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* @param record[in] The current keypress.
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*/
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void dynamic_macro_record_key(
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keyrecord_t **macro_pointer,
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keyrecord_t *macro_end2,
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int8_t direction,
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keyrecord_t *record)
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{
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if (*macro_pointer + direction != macro_end2) {
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**macro_pointer = *record;
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*macro_pointer += direction;
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} else {
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/* Notify about the end of buffer. The blinks are paired
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* because they should happen on both down and up events. */
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backlight_toggle();
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}
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}
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/**
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* End recording of the dynamic macro. Essentially just update the
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* pointer to the end of the macro.
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*/
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void dynamic_macro_record_end(keyrecord_t *macro_pointer, keyrecord_t **macro_end)
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{
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dynamic_macro_led_blink();
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*macro_end = macro_pointer;
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}
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/* Handle the key events related to the dynamic macros. Should be
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* called from process_record_user() like this:
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*
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* bool process_record_user(uint16_t keycode, keyrecord_t *record) {
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* if (!process_record_dynamic_macro(keycode, record)) {
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* return false;
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* }
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* <...THE REST OF THE FUNCTION...>
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* }
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*/
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bool process_record_dynamic_macro(uint16_t keycode, keyrecord_t *record)
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{
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/* Both macros use the same buffer but read/write on different
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* ends of it.
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*
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* Macro1 is written left-to-right starting from the beginning of
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* the buffer.
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*
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* Macro2 is written right-to-left starting from the end of the
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* buffer.
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*
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* ¯o_buffer macro_end
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* v v
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* +------------------------------------------------------------+
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* |>>>>>> MACRO1 >>>>>>| |<<<<<<<<<<<<< MACRO2 <<<<<<<<<<<<<|
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* +------------------------------------------------------------+
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* ^ ^
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* r_macro_end r_macro_buffer
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*
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* During the recording when one macro encounters the end of the
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* other macro, the recording is stopped. Apart from this, there
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* are no arbitrary limits for the macros' length in relation to
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* each other: for example one can either have two medium sized
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* macros or one long macro and one short macro. Or even one empty
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* and one using the whole buffer.
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*/
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static keyrecord_t macro_buffer[DYNAMIC_MACRO_SIZE];
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/* Pointer to the first buffer element after the first macro.
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* Initially points to the very beginning of the buffer since the
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* macro is empty. */
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static keyrecord_t *macro_end = macro_buffer;
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/* The other end of the macro buffer. Serves as the beginning of
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* the second macro. */
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static keyrecord_t *const r_macro_buffer = macro_buffer + DYNAMIC_MACRO_SIZE - 1;
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/* Like macro_end but for the second macro. */
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static keyrecord_t *r_macro_end = r_macro_buffer;
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/* A persistent pointer to the current macro position (iterator)
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* used during the recording. */
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static keyrecord_t *macro_pointer = NULL;
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/* 0 - no macro is being recorded right now
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* 1,2 - either macro 1 or 2 is being recorded */
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static uint8_t macro_id = 0;
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if (macro_id == 0) {
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/* No macro recording in progress. */
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if (!record->event.pressed) {
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switch (keycode) {
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case DYN_REC_START1:
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dynamic_macro_record_start(¯o_pointer, macro_buffer);
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macro_id = 1;
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return false;
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case DYN_REC_START2:
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dynamic_macro_record_start(¯o_pointer, r_macro_buffer);
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macro_id = 2;
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return false;
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case DYN_MACRO_PLAY1:
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dynamic_macro_play(macro_buffer, macro_end, +1);
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return false;
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case DYN_MACRO_PLAY2:
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dynamic_macro_play(r_macro_buffer, r_macro_end, -1);
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return false;
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}
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}
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} else {
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/* A macro is being recorded right now. */
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switch (keycode) {
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case MO(_DYN):
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/* Use the layer key used to access the macro recording as
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* a stop button. */
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if (record->event.pressed) { /* Ignore the initial release
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* just after the recoding
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* starts. */
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switch (macro_id) {
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case 1:
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dynamic_macro_record_end(macro_pointer, ¯o_end);
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break;
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case 2:
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dynamic_macro_record_end(macro_pointer, &r_macro_end);
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break;
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}
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macro_id = 0;
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}
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return false;
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default:
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/* Store the key in the macro buffer and process it normally. */
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switch (macro_id) {
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case 1:
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dynamic_macro_record_key(¯o_pointer, r_macro_end, +1, record);
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break;
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case 2:
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dynamic_macro_record_key(¯o_pointer, macro_end, -1, record);
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break;
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}
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return true;
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break;
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}
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}
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return true;
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}
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#endif
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