From d48690b32071316d944b7653e0ad94b608a7a19f Mon Sep 17 00:00:00 2001
From: Cameron Gutman <aicommander@gmail.com>
Date: Thu, 29 Jun 2023 00:17:43 -0500
Subject: [PATCH] Implement controller touchpad support

---
 Limelight/Input/Controller.h        |  5 +++
 Limelight/Input/ControllerSupport.m | 48 +++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+)

diff --git a/Limelight/Input/Controller.h b/Limelight/Input/Controller.h
index c16bcb7..b7d664c 100644
--- a/Limelight/Input/Controller.h
+++ b/Limelight/Input/Controller.h
@@ -25,6 +25,11 @@
 @property (nonatomic)                   short lastRightStickX;
 @property (nonatomic)                   short lastRightStickY;
 
+@property (nonatomic)                   float lastPrimaryTouchX;
+@property (nonatomic)                   float lastPrimaryTouchY;
+@property (nonatomic)                   float lastSecondaryTouchX;
+@property (nonatomic)                   float lastSecondaryTouchY;
+
 @property (nonatomic)                   HapticContext* _Nullable lowFreqMotor;
 @property (nonatomic)                   HapticContext* _Nullable highFreqMotor;
 @property (nonatomic)                   HapticContext* _Nullable leftTriggerMotor;
diff --git a/Limelight/Input/ControllerSupport.m b/Limelight/Input/ControllerSupport.m
index 31225ea..db1c46b 100644
--- a/Limelight/Input/ControllerSupport.m
+++ b/Limelight/Input/ControllerSupport.m
@@ -422,6 +422,46 @@ static const double MOUSE_SPEED_DIVISOR = 1.25;
     }
 }
 
+-(void) handleControllerTouchpad:(Controller*)controller primaryTouch:(GCControllerDirectionPad*)primaryTouch secondaryTouch:(GCControllerDirectionPad*)secondaryTouch
+{
+    // If we went from a touch to no touch, generate a touch up event
+    if ((controller.lastPrimaryTouchX || controller.lastPrimaryTouchY) && (!primaryTouch.xAxis.value && !primaryTouch.yAxis.value)) {
+        LiSendTouchEvent(LI_TOUCH_EVENT_UP, 0, primaryTouch.xAxis.value, primaryTouch.yAxis.value, 1.0f);
+    }
+    else if (primaryTouch.xAxis.value || primaryTouch.yAxis.value) {
+        // If we went from no touch to a touch, generate a touch down event
+        if (!controller.lastPrimaryTouchX && !controller.lastPrimaryTouchY) {
+            LiSendTouchEvent(LI_TOUCH_EVENT_DOWN, 0, primaryTouch.xAxis.value, primaryTouch.yAxis.value, 1.0f);
+        }
+        else if (controller.lastPrimaryTouchX != primaryTouch.xAxis.value ||
+                 controller.lastPrimaryTouchY != primaryTouch.yAxis.value) {
+            // Otherwise it's just a move
+            LiSendTouchEvent(LI_TOUCH_EVENT_MOVE, 0, primaryTouch.xAxis.value, primaryTouch.yAxis.value, 1.0f);
+        }
+    }
+    controller.lastPrimaryTouchX = primaryTouch.xAxis.value;
+    controller.lastPrimaryTouchY = primaryTouch.yAxis.value;
+    
+    
+    // If we went from a touch to no touch, generate a touch up event
+    if ((controller.lastSecondaryTouchX || controller.lastSecondaryTouchY) && (!secondaryTouch.xAxis.value && !secondaryTouch.yAxis.value)) {
+        LiSendTouchEvent(LI_TOUCH_EVENT_UP, 1, secondaryTouch.xAxis.value, secondaryTouch.yAxis.value, 1.0f);
+    }
+    else if (secondaryTouch.xAxis.value || secondaryTouch.yAxis.value) {
+        // If we went from no touch to a touch, generate a touch down event
+        if (!controller.lastSecondaryTouchX && !controller.lastSecondaryTouchY) {
+            LiSendTouchEvent(LI_TOUCH_EVENT_DOWN, 1, secondaryTouch.xAxis.value, secondaryTouch.yAxis.value, 1.0f);
+        }
+        else if (controller.lastSecondaryTouchX != secondaryTouch.xAxis.value ||
+                 controller.lastSecondaryTouchY != secondaryTouch.yAxis.value) {
+            // Otherwise it's just a move
+            LiSendTouchEvent(LI_TOUCH_EVENT_MOVE, 1, secondaryTouch.xAxis.value, secondaryTouch.yAxis.value, 1.0f);
+        }
+    }
+    controller.lastSecondaryTouchX = secondaryTouch.xAxis.value;
+    controller.lastSecondaryTouchY = secondaryTouch.yAxis.value;
+}
+
 -(void) registerControllerCallbacks:(GCController*) controller
 {
     if (controller != NULL) {
@@ -549,6 +589,10 @@ static const double MOUSE_SPEED_DIVISOR = 1.25;
                         if (dualShockGamepad.touchpadButton) {
                             UPDATE_BUTTON_FLAG(limeController, TOUCHPAD_FLAG, dualShockGamepad.touchpadButton.pressed);
                         }
+                        
+                        [self handleControllerTouchpad:limeController
+                                          primaryTouch:dualShockGamepad.touchpadPrimary
+                                        secondaryTouch:dualShockGamepad.touchpadSecondary];
                     }
                     
                     if (@available(iOS 14.5, tvOS 14.5, *)) {
@@ -558,6 +602,10 @@ static const double MOUSE_SPEED_DIVISOR = 1.25;
                             if (dualSenseGamepad.touchpadButton) {
                                 UPDATE_BUTTON_FLAG(limeController, TOUCHPAD_FLAG, dualSenseGamepad.touchpadButton.pressed);
                             }
+                            
+                            [self handleControllerTouchpad:limeController
+                                              primaryTouch:dualSenseGamepad.touchpadPrimary
+                                            secondaryTouch:dualSenseGamepad.touchpadSecondary];
                         }
                     }
                 }