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-rw-r--r--quantum/dynamic_macro.h226
1 files changed, 226 insertions, 0 deletions
diff --git a/quantum/dynamic_macro.h b/quantum/dynamic_macro.h
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+/* Author: Wojciech Siewierski < wojciech dot siewierski at onet dot pl > */
+#ifndef DYNAMIC_MACROS_H
+#define DYNAMIC_MACROS_H
+
+#include "action_layer.h"
+
+#ifndef DYNAMIC_MACRO_SIZE
+/* May be overridden with a custom value. Be aware that the effective
+ * macro length is half of this value: each keypress is recorded twice
+ * because of the down-event and up-event. This is not a bug, it's the
+ * intended behavior. */
+#define DYNAMIC_MACRO_SIZE 256
+#endif
+
+/* DYNAMIC_MACRO_RANGE must be set as the last element of user's
+ * "planck_keycodes" enum prior to including this header. This allows
+ * us to 'extend' it.
+ */
+enum dynamic_macro_keycodes {
+ DYN_REC_START1 = DYNAMIC_MACRO_RANGE,
+ DYN_REC_START2,
+ DYN_MACRO_PLAY1,
+ DYN_MACRO_PLAY2,
+};
+
+/* Blink the LEDs to notify the user about some event. */
+void dynamic_macro_led_blink(void)
+{
+ backlight_toggle();
+ _delay_ms(100);
+ backlight_toggle();
+}
+
+/**
+ * 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)
+{
+ dynamic_macro_led_blink();
+
+ 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)
+{
+ uint32_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;
+}
+
+/**
+ * Record a single key in a dynamic macro.
+ *
+ * @param macro_pointer[in,out] The current buffer position.
+ * @param macro_end2[in] The end of the other macro which shouldn't be overwritten.
+ * @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_pointer,
+ keyrecord_t *macro_end2,
+ int8_t direction,
+ keyrecord_t *record)
+{
+ if (*macro_pointer + direction != macro_end2) {
+ **macro_pointer = *record;
+ *macro_pointer += direction;
+ } else {
+ /* Notify about the end of buffer. The blinks are paired
+ * because they should happen on both down and up events. */
+ backlight_toggle();
+ }
+}
+
+/**
+ * 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_pointer, keyrecord_t **macro_end)
+{
+ dynamic_macro_led_blink();
+
+ *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_record_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 MO(_DYN):
+ /* Use the layer key used to access the macro recording as
+ * a stop button. */
+ if (record->event.pressed) { /* Ignore the initial release
+ * just after the recoding
+ * starts. */
+ switch (macro_id) {
+ case 1:
+ dynamic_macro_record_end(macro_pointer, &macro_end);
+ break;
+ case 2:
+ dynamic_macro_record_end(macro_pointer, &r_macro_end);
+ break;
+ }
+ macro_id = 0;
+ }
+ return false;
+ default:
+ /* Store the key in the macro buffer and process it normally. */
+ switch (macro_id) {
+ case 1:
+ dynamic_macro_record_key(&macro_pointer, r_macro_end, +1, record);
+ break;
+ case 2:
+ dynamic_macro_record_key(&macro_pointer, macro_end, -1, record);
+ break;
+ }
+ return true;
+ break;
+ }
+ }
+
+ return true;
+}
+
+#endif