Android: Better track touch input returned from IsMouse*() (#1144)

* Android: Better track touch input returned from IsMouse*()

Switch to actually tracking touch input to use for "mouse" input rather
than the gestures system. The gesture system as an abstraction ontop of
raw touch input loses some information needed to map to "mouse"
input.

Before,
- IsMouseButtonReleased() triggers immediately after the initial touch
(because GESTURE_TAP activates immediately on touch) instead of waiting for the
touch to be released.
- IsMouseButtonUp() returns false, when it should just be the opposite
of IsMouseButtonDown().
- IsMouseButtonDown() returns true only after GESTURE_HOLD (which
activates after some period of time after GESTURE_TAP), when instead it
should just be true whenever there is touch input i.e. gesture !=
GESTURE_NONE or alternatively when any input is received on the screen.

After this PR, touches map closer to mouse input.
- IsMouseButtonReleased() triggers when touch is released (last frame
was touched, this frame not touched).
- IsMouseButtonUp() returns the opposite of IsMouseButtonDown()
- IsMouseButtonDown() is true when
(AMOTION_EVENT_ACTION_DOWN || AMOTION_EVENT_ACTION_MOVE) and false when
(AMOTION_EVENT_ACTION_UP)

* RPI: Include index check for RPI in GetTouchPosition()

src/core.c

@@ -2504,14 +2504,10 @@ bool IsMouseButtonPressed(int button)
 {
     bool pressed = false;
 
-#if defined(PLATFORM_ANDROID)
-    if (IsGestureDetected(GESTURE_TAP)) pressed = true;
-#else
     if ((CORE.Input.Mouse.currentButtonState[button] == 1) && (CORE.Input.Mouse.previousButtonState[button] == 0)) pressed = true;
 
     // Map touches to mouse buttons checking
     if ((CORE.Input.Touch.currentTouchState[button] == 1) && (CORE.Input.Touch.previousTouchState[button] == 0)) pressed = true;
-#endif
 
     return pressed;
 }
@@ -2521,14 +2517,10 @@ bool IsMouseButtonDown(int button)
 {
     bool down = false;
 
-#if defined(PLATFORM_ANDROID)
-    if (IsGestureDetected(GESTURE_HOLD)) down = true;
-#else
     if (CORE.Input.Mouse.currentButtonState[button] == 1) down = true;
 
     // Map touches to mouse buttons checking
     if (CORE.Input.Touch.currentTouchState[button] == 1) down = true;
-#endif
 
     return down;
 }
@@ -2538,16 +2530,10 @@ bool IsMouseButtonReleased(int button)
 {
     bool released = false;
 
-#if defined(PLATFORM_ANDROID)
-    #if defined(SUPPORT_GESTURES_SYSTEM)
-        released = GetGestureDetected() == GESTURE_TAP;
-    #endif
-#else
     if ((CORE.Input.Mouse.currentButtonState[button] == 0) && (CORE.Input.Mouse.previousButtonState[button] == 1)) released = true;
     
     // Map touches to mouse buttons checking
     if ((CORE.Input.Touch.currentTouchState[button] == 0) && (CORE.Input.Touch.previousTouchState[button] == 1)) released = true;
-#endif
 
     return released;
 }
@@ -2555,16 +2541,7 @@ bool IsMouseButtonReleased(int button)
 // Detect if a mouse button is NOT being pressed
 bool IsMouseButtonUp(int button)
 {
-    bool up = false;
-
-#if !defined(PLATFORM_ANDROID)
-    if (CORE.Input.Mouse.currentButtonState[button] == 0) up = true;
-    
-    // Map touches to mouse buttons checking
-    if (CORE.Input.Touch.currentTouchState[button] == 0) up = true;
-#endif
-
-    return up;
+    return !IsMouseButtonDown(button);
 }
 
 // Returns mouse position X
@@ -2671,7 +2648,7 @@ Vector2 GetTouchPosition(int index)
 {
     Vector2 position = { -1.0f, -1.0f };
 
-#if defined(PLATFORM_ANDROID) || defined(PLATFORM_WEB)
+#if defined(PLATFORM_ANDROID) || defined(PLATFORM_WEB) || defined(PLATFORM_RPI)
     if (index < MAX_TOUCH_POINTS) position = CORE.Input.Touch.position[index];
     else TRACELOG(LOG_WARNING, "Required touch point out of range (Max touch points: %i)", MAX_TOUCH_POINTS);
 
@@ -2687,11 +2664,7 @@ Vector2 GetTouchPosition(int index)
         position.y = position.y*((float)CORE.Window.render.height/(float)CORE.Window.display.height) - CORE.Window.renderOffset.y/2;
     }
     #endif
-#endif
-#if defined(PLATFORM_RPI)
-    position = CORE.Input.Touch.position[index];
-#endif
-#if defined(PLATFORM_DESKTOP)
+#elif defined(PLATFORM_DESKTOP)
     // TODO: GLFW is not supporting multi-touch input just yet
     // https://www.codeproject.com/Articles/668404/Programming-for-Multi-Touch
     // https://docs.microsoft.com/en-us/windows/win32/wintouch/getting-started-with-multi-touch-messages
@@ -3763,7 +3736,9 @@ static void PollInputEvents(void)
     // Register previous mouse wheel state
     CORE.Input.Mouse.previousWheelMove = CORE.Input.Mouse.currentWheelMove;
     CORE.Input.Mouse.currentWheelMove = 0;
+#endif
 
+#if defined(PLATFORM_DESKTOP) || defined(PLATFORM_WEB) || defined(PLATFORM_ANDROID) || defined(PLATFORM_RPI)
     // Register previous touch states
     for (int i = 0; i < MAX_TOUCH_POINTS; i++) CORE.Input.Touch.previousTouchState[i] = CORE.Input.Touch.currentTouchState[i];
 #endif
@@ -4315,10 +4290,20 @@ static int32_t AndroidInputCallback(struct android_app *app, AInputEvent *event)
     CORE.Input.Touch.position[0].x = AMotionEvent_getX(event, 0);
     CORE.Input.Touch.position[0].y = AMotionEvent_getY(event, 0);
 
-#if defined(SUPPORT_GESTURES_SYSTEM)
     int32_t action = AMotionEvent_getAction(event);
     unsigned int flags = action & AMOTION_EVENT_ACTION_MASK;
 
+    if (flags == AMOTION_EVENT_ACTION_DOWN || flags == AMOTION_EVENT_ACTION_MOVE)
+    {
+        CORE.Input.Touch.currentTouchState[MOUSE_LEFT_BUTTON] = 1;
+    }
+    else if (flags == AMOTION_EVENT_ACTION_UP)
+    {
+        CORE.Input.Touch.currentTouchState[MOUSE_LEFT_BUTTON] = 0;
+    }
+
+#if defined(SUPPORT_GESTURES_SYSTEM)
+
     GestureEvent gestureEvent;
 
     // Register touch actions