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-rw-r--r--layer.c92
1 files changed, 92 insertions, 0 deletions
diff --git a/layer.c b/layer.c
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index 000000000..5b9b591fe
--- /dev/null
+++ b/layer.c
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+#include "keymap_skel.h"
+#include "usb_keyboard.h"
+#include "debug.h"
+#include "timer.h"
+#include "layer.h"
+
+/*
+ * LAYER_ENTER_DELAY: prevent from moving new layer
+ * press release
+ * Fn key sate ____|~~~~~~~~~~~~~~~~~~~|_______________
+ *
+ * enter_delay |======|
+ * new layer
+ * Layer sw ___________|~~~~~~~~~~~~|_______________
+ */
+#define LAYER_ENTER_DELAY 10
+
+/*
+ * LAYER_SEND_FN_TERM: send keycode if release key in this term
+ * press release(send)
+ * Fn key state ____|~~~~~~~~~~~~~|_______________
+ * press | release(not send)
+ * Fn key state ____|~~~~~~~~~~~~~|~~~~~~|__________
+ * | |
+ * send_fn_term |=============o==| x
+ */
+#define LAYER_SEND_FN_TERM 30
+
+
+static uint8_t current_layer = 0;
+static bool layer_used = false;
+
+
+uint8_t layer_get_keycode(uint8_t row, uint8_t col)
+{
+ uint8_t code = keymap_get_keycode(current_layer, row, col);
+ // normal key or mouse key
+ if ((IS_KEY(code) || IS_MOUSE(code)))
+ layer_used = true;
+ return code;
+}
+
+void layer_switching(uint8_t fn_bits)
+{
+ // layer switching
+ static uint8_t last_bits = 0;
+ static uint8_t last_mod = 0;
+ static uint16_t last_timer = 0;
+
+ //uint16_t now_timer;
+
+ if (fn_bits == last_bits) {
+ // switch layer when specific time elapsed
+ if (current_layer != keymap_fn_layer(fn_bits) &&
+ timer_elapsed(last_timer) > LAYER_ENTER_DELAY) {
+ current_layer = keymap_fn_layer(fn_bits);
+ debug("time_elapsed: "); debug_hex16(timer_elapsed(last_timer)); debug("\n");
+ debug("switch layer: "); debug_hex(current_layer); debug("\n");
+ }
+ } else if (fn_bits == 0) {
+ // send key when Fn key is released without using the layer and within specific time
+ if ((!layer_used || current_layer != keymap_fn_layer(last_bits)) &&
+ timer_elapsed(last_timer) < LAYER_SEND_FN_TERM) {
+ uint8_t code = keymap_fn_keycode(last_bits);
+ if (code != KB_NO) {
+ if (IS_MOD(code)) {
+ keyboard_modifier_keys = last_mod | MOD_BIT(code);
+ } else {
+ keyboard_keys[0] = code;
+ keyboard_modifier_keys = last_mod;
+ }
+ usb_keyboard_send();
+ usb_keyboard_print();
+ usb_keyboard_clear();
+ }
+ }
+ last_bits = 0;
+ last_mod = 0;
+ layer_used = false;
+ current_layer = 0; // default layer
+ } else if ((fn_bits & (fn_bits - 1)) == 0) {
+ // switch layer when just one Fn Key is pressed
+ if (!usb_keyboard_has_key()) {
+ last_bits = fn_bits;
+ last_mod = keyboard_modifier_keys;
+ last_timer = timer_read();
+ debug("last_bits: "); debug_bin(last_bits); debug("\n");
+ debug("last_mod: "); debug_hex(last_mod); debug("\n");
+ debug("last_timer: "); debug_hex16(last_timer); debug("\n");
+ }
+ }
+}