From 7c1ab90992554ebacb89afc6ea6f9db7bf320799 Mon Sep 17 00:00:00 2001
From: DriftKingTW <driftkingtw@gmail.com>
Date: Mon, 20 Mar 2023 22:29:55 +0800
Subject: [PATCH] feat: momentary layer support

---
 src/main.cpp | 39 +++++++++++++++++++++++++++++++++++++++
 src/main.hpp |  2 ++
 2 files changed, 41 insertions(+)

diff --git a/src/main.cpp b/src/main.cpp
index 0a14da0..cd555b5 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -56,6 +56,8 @@ byte layoutLength = 0;
 String currentLayout = "";
 // For maximum 10 layers
 const short jsonDocSize = 16384;
+size_t tapToggleOrginalLayerIndex = 0;
+bool isTemporaryToggled = false;
 
 byte inputs[] = {23, 19, 18, 5, 32, 33, 25};  // declaring inputs and outputs
 const int inputCount = sizeof(inputs) / sizeof(inputs[0]);
@@ -655,11 +657,25 @@ void loop() {
                             .substring(6, sizeof(keyMap[r][c].keyInfo) - 1)
                             .toInt();
                     macroPress(macroMap[index]);
+                } else if (keyMap[r][c].keyInfo.startsWith("TT_")) {
+                    // Tap-Toggle press
+                    if (!isTemporaryToggled) {
+                        size_t index =
+                            keyMap[r][c]
+                                .keyInfo
+                                .substring(3, sizeof(keyMap[r][c].keyInfo) - 1)
+                                .toInt();
+                        tapToggleActive(index);
+                    }
                 } else {
                     // Standard key press
                     keyPress(keyMap[r][c]);
                 }
             } else {
+                if (keyMap[r][c].keyInfo.startsWith("TT_") &&
+                    isTemporaryToggled) {
+                    tapToggleRelease(tapToggleOrginalLayerIndex);
+                }
                 keyRelease(keyMap[r][c]);
             }
             delayMicroseconds(10);
@@ -884,6 +900,29 @@ void macroPress(Macro &macro) {
     delay(100);
 }
 
+/**
+ * Tap toggle layer
+ *
+ * @param {size_t} index of the layer to be toggled
+ */
+void tapToggleActive(size_t index) {
+    isTemporaryToggled = true;
+    tapToggleOrginalLayerIndex = currentLayoutIndex;
+    currentLayoutIndex = index;
+    initKeys();
+}
+
+/**
+ * Tap toggle layer release
+ *
+ * @param {size_t} original layer index of the layer to be restored
+ */
+void tapToggleRelease(size_t orginalLayerIndex) {
+    isTemporaryToggled = false;
+    currentLayoutIndex = orginalLayerIndex;
+    initKeys();
+}
+
 /**
  * Switch keymap layout
  *
diff --git a/src/main.hpp b/src/main.hpp
index 12f2b15..3278484 100644
--- a/src/main.hpp
+++ b/src/main.hpp
@@ -91,6 +91,8 @@ bool keyPress(uint8_t keyStroke, String keyInfo, bool keyState);
 void keyRelease(Key &key);
 bool keyRelease(uint8_t keyStroke, String keyInfo, bool keyState);
 void macroPress(Macro &macro);
+void tapToggleActive(size_t index);
+void tapToggleRelease(size_t orginalLayerIndex);
 void switchLayout();
 void switchLayout(int layoutIndex);
 int findLayoutIndex(String layoutName);