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-rw-r--r--quantum/process_keycode/process_dynamic_macro.c257
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diff --git a/quantum/process_keycode/process_dynamic_macro.c b/quantum/process_keycode/process_dynamic_macro.c
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+/* Copyright 2016 Jack Humbert
+ * Copyright 2019 Drashna Jael're (@drashna, aka Christopher Courtney)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Author: Wojciech Siewierski < wojciech dot siewierski at onet dot pl > */
+#include "process_dynamic_macro.h"
+
+// default feedback method
+void dynamic_macro_led_blink(void) {
+#ifdef BACKLIGHT_ENABLE
+ backlight_toggle();
+ wait_ms(100);
+ backlight_toggle();
+#endif
+}
+
+/* User hooks for Dynamic Macros */
+
+__attribute__((weak)) void dynamic_macro_record_start_user(void) { dynamic_macro_led_blink(); }
+
+__attribute__((weak)) void dynamic_macro_play_user(int8_t direction) { dynamic_macro_led_blink(); }
+
+__attribute__((weak)) void dynamic_macro_record_key_user(int8_t direction, keyrecord_t *record) { dynamic_macro_led_blink(); }
+
+__attribute__((weak)) void dynamic_macro_record_end_user(int8_t direction) { dynamic_macro_led_blink(); }
+
+/* Convenience macros used for retrieving the debug info. All of them
+ * need a `direction` variable accessible at the call site.
+ */
+#define DYNAMIC_MACRO_CURRENT_SLOT() (direction > 0 ? 1 : 2)
+#define DYNAMIC_MACRO_CURRENT_LENGTH(BEGIN, POINTER) ((int)(direction * ((POINTER) - (BEGIN))))
+#define DYNAMIC_MACRO_CURRENT_CAPACITY(BEGIN, END2) ((int)(direction * ((END2) - (BEGIN)) + 1))
+
+/**
+ * Start recording of the dynamic macro.
+ *
+ * @param[out] macro_pointer The new macro buffer iterator.
+ * @param[in] macro_buffer The macro buffer used to initialize macro_pointer.
+ */
+void dynamic_macro_record_start(keyrecord_t **macro_pointer, keyrecord_t *macro_buffer) {
+ dprintln("dynamic macro recording: started");
+
+ dynamic_macro_record_start_user();
+
+ clear_keyboard();
+ layer_clear();
+ *macro_pointer = macro_buffer;
+}
+
+/**
+ * Play the dynamic macro.
+ *
+ * @param macro_buffer[in] The beginning of the macro buffer being played.
+ * @param macro_end[in] The element after the last macro buffer element.
+ * @param direction[in] Either +1 or -1, which way to iterate the buffer.
+ */
+void dynamic_macro_play(keyrecord_t *macro_buffer, keyrecord_t *macro_end, int8_t direction) {
+ dprintf("dynamic macro: slot %d playback\n", DYNAMIC_MACRO_CURRENT_SLOT());
+
+ layer_state_t saved_layer_state = layer_state;
+
+ clear_keyboard();
+ layer_clear();
+
+ while (macro_buffer != macro_end) {
+ process_record(macro_buffer);
+ macro_buffer += direction;
+ }
+
+ clear_keyboard();
+
+ layer_state = saved_layer_state;
+
+ dynamic_macro_play_user(direction);
+}
+
+/**
+ * Record a single key in a dynamic macro.
+ *
+ * @param macro_buffer[in] The start of the used macro buffer.
+ * @param macro_pointer[in,out] The current buffer position.
+ * @param macro2_end[in] The end of the other macro.
+ * @param direction[in] Either +1 or -1, which way to iterate the buffer.
+ * @param record[in] The current keypress.
+ */
+void dynamic_macro_record_key(keyrecord_t *macro_buffer, keyrecord_t **macro_pointer, keyrecord_t *macro2_end, int8_t direction, keyrecord_t *record) {
+ /* If we've just started recording, ignore all the key releases. */
+ if (!record->event.pressed && *macro_pointer == macro_buffer) {
+ dprintln("dynamic macro: ignoring a leading key-up event");
+ return;
+ }
+
+ /* The other end of the other macro is the last buffer element it
+ * is safe to use before overwriting the other macro.
+ */
+ if (*macro_pointer - direction != macro2_end) {
+ **macro_pointer = *record;
+ *macro_pointer += direction;
+ } else {
+ dynamic_macro_record_key_user(direction, record);
+ }
+
+ dprintf("dynamic macro: slot %d length: %d/%d\n", DYNAMIC_MACRO_CURRENT_SLOT(), DYNAMIC_MACRO_CURRENT_LENGTH(macro_buffer, *macro_pointer), DYNAMIC_MACRO_CURRENT_CAPACITY(macro_buffer, macro2_end));
+}
+
+/**
+ * End recording of the dynamic macro. Essentially just update the
+ * pointer to the end of the macro.
+ */
+void dynamic_macro_record_end(keyrecord_t *macro_buffer, keyrecord_t *macro_pointer, int8_t direction, keyrecord_t **macro_end) {
+ dynamic_macro_record_end_user(direction);
+
+ /* Do not save the keys being held when stopping the recording,
+ * i.e. the keys used to access the layer DYN_REC_STOP is on.
+ */
+ while (macro_pointer != macro_buffer && (macro_pointer - direction)->event.pressed) {
+ dprintln("dynamic macro: trimming a trailing key-down event");
+ macro_pointer -= direction;
+ }
+
+ dprintf("dynamic macro: slot %d saved, length: %d\n", DYNAMIC_MACRO_CURRENT_SLOT(), DYNAMIC_MACRO_CURRENT_LENGTH(macro_buffer, macro_pointer));
+
+ *macro_end = macro_pointer;
+}
+
+/* Handle the key events related to the dynamic macros. Should be
+ * called from process_record_user() like this:
+ *
+ * bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+ * if (!process_record_dynamic_macro(keycode, record)) {
+ * return false;
+ * }
+ * <...THE REST OF THE FUNCTION...>
+ * }
+ */
+bool process_dynamic_macro(uint16_t keycode, keyrecord_t *record) {
+ /* Both macros use the same buffer but read/write on different
+ * ends of it.
+ *
+ * Macro1 is written left-to-right starting from the beginning of
+ * the buffer.
+ *
+ * Macro2 is written right-to-left starting from the end of the
+ * buffer.
+ *
+ * &macro_buffer macro_end
+ * v v
+ * +------------------------------------------------------------+
+ * |>>>>>> MACRO1 >>>>>> <<<<<<<<<<<<< MACRO2 <<<<<<<<<<<<<|
+ * +------------------------------------------------------------+
+ * ^ ^
+ * r_macro_end r_macro_buffer
+ *
+ * During the recording when one macro encounters the end of the
+ * other macro, the recording is stopped. Apart from this, there
+ * are no arbitrary limits for the macros' length in relation to
+ * each other: for example one can either have two medium sized
+ * macros or one long macro and one short macro. Or even one empty
+ * and one using the whole buffer.
+ */
+ static keyrecord_t macro_buffer[DYNAMIC_MACRO_SIZE];
+
+ /* Pointer to the first buffer element after the first macro.
+ * Initially points to the very beginning of the buffer since the
+ * macro is empty. */
+ static keyrecord_t *macro_end = macro_buffer;
+
+ /* The other end of the macro buffer. Serves as the beginning of
+ * the second macro. */
+ static keyrecord_t *const r_macro_buffer = macro_buffer + DYNAMIC_MACRO_SIZE - 1;
+
+ /* Like macro_end but for the second macro. */
+ static keyrecord_t *r_macro_end = r_macro_buffer;
+
+ /* A persistent pointer to the current macro position (iterator)
+ * used during the recording. */
+ static keyrecord_t *macro_pointer = NULL;
+
+ /* 0 - no macro is being recorded right now
+ * 1,2 - either macro 1 or 2 is being recorded */
+ static uint8_t macro_id = 0;
+
+ if (macro_id == 0) {
+ /* No macro recording in progress. */
+ if (!record->event.pressed) {
+ switch (keycode) {
+ case DYN_REC_START1:
+ dynamic_macro_record_start(&macro_pointer, macro_buffer);
+ macro_id = 1;
+ return false;
+ case DYN_REC_START2:
+ dynamic_macro_record_start(&macro_pointer, r_macro_buffer);
+ macro_id = 2;
+ return false;
+ case DYN_MACRO_PLAY1:
+ dynamic_macro_play(macro_buffer, macro_end, +1);
+ return false;
+ case DYN_MACRO_PLAY2:
+ dynamic_macro_play(r_macro_buffer, r_macro_end, -1);
+ return false;
+ }
+ }
+ } else {
+ /* A macro is being recorded right now. */
+ switch (keycode) {
+ case DYN_REC_STOP:
+ /* Stop the macro recording. */
+ if (record->event.pressed) { /* Ignore the initial release
+ * just after the recoding
+ * starts. */
+ switch (macro_id) {
+ case 1:
+ dynamic_macro_record_end(macro_buffer, macro_pointer, +1, &macro_end);
+ break;
+ case 2:
+ dynamic_macro_record_end(r_macro_buffer, macro_pointer, -1, &r_macro_end);
+ break;
+ }
+ macro_id = 0;
+ }
+ return false;
+#ifdef DYNAMIC_MACRO_NO_NESTING
+ case DYN_MACRO_PLAY1:
+ case DYN_MACRO_PLAY2:
+ dprintln("dynamic macro: ignoring macro play key while recording");
+ return false;
+#endif
+ default:
+ /* Store the key in the macro buffer and process it normally. */
+ switch (macro_id) {
+ case 1:
+ dynamic_macro_record_key(macro_buffer, &macro_pointer, r_macro_end, +1, record);
+ break;
+ case 2:
+ dynamic_macro_record_key(r_macro_buffer, &macro_pointer, macro_end, -1, record);
+ break;
+ }
+ return true;
+ break;
+ }
+ }
+
+ return true;
+}