From 2e579a3b11b3bb5bb8417686230b16cdd3c74190 Mon Sep 17 00:00:00 2001
From: Ben <benjaminkyd@gmail.com>
Date: Thu, 19 Aug 2021 18:16:42 +0100
Subject: [PATCH] keyboard ennit

---
 Aeon/Input/Input.cpp | 28 +++++++++++++++++++++++++---
 Aeon/Input/Input.hpp |  6 ++++--
 2 files changed, 29 insertions(+), 5 deletions(-)

diff --git a/Aeon/Input/Input.cpp b/Aeon/Input/Input.cpp
index a0caf68..abac537 100644
--- a/Aeon/Input/Input.cpp
+++ b/Aeon/Input/Input.cpp
@@ -1,6 +1,8 @@
 #include "Aeon/Input/Input.hpp"
 
 #include <iostream>
+#include <algorithm>
+#include <iterator>
 
 #include "Aeon/Core/Events.hpp"
 
@@ -15,6 +17,10 @@ Input::Input()
     mDisplayEventDispatcher.RegisterAsSource( "ENGINE_DISPLAY_CORE" );
     mMouseEventDispatcher.RegisterAsSource( "ENGINE_INPUT_MOUSE" );
     mKeyboardEventDispatcher.RegisterAsSource( "ENGINE_INPUT_KEYBOARD" );
+
+    mKbdState = static_cast<const uint8_t*>(SDL_GetKeyboardState( &numScancodes ));
+    mOldKbdState = static_cast<uint8_t*>(malloc( numScancodes / sizeof( uint8_t ) ));
+    memcpy( mOldKbdState, mKbdState, 242 / sizeof( uint8_t ) );
 }
 
 Input::~Input()
@@ -22,10 +28,13 @@ Input::~Input()
     mDisplayEventDispatcher.DeRegisterAsSource( "ENGINE_DISPLAY_CORE" );
     mMouseEventDispatcher.DeRegisterAsSource( "ENGINE_INPUT_MOUSE" );
     mKeyboardEventDispatcher.DeRegisterAsSource( "ENGINE_INPUT_KEYBOARD" );
+
+    free( mOldKbdState );
 }
 
 void Input::PollInput()
 {
+    SDL_PumpEvents();
 	while ( SDL_PollEvent( &mEvent ) )
 	{
 		switch ( mEvent.type )
@@ -54,9 +63,22 @@ void Input::PollInput()
 		}
 	}
 
-	//Uint8* state = (Uint8*)SDL_GetKeyboardState( NULL );
-	//std::cout << state << std::endl;
-	//std::cout << std::endl;
+    // just in case
+    mKbdState = static_cast<const uint8_t*>(SDL_GetKeyboardState( &numScancodes ));
+
+    // keyboard processing
+
+    // first we want to check if any key has changed
+    // if a key has changed, then we want to check if any keys are pressed
+    // if a key is pressed we want to check the keys and dispatch events
+    // according to the scancode
+    // keydown and keyup will be done seperately
+    if ( !std::equal( mKbdState, mKbdState + numScancodes, mOldKbdState ) )
+    {
+        std::cout << "keyboard ennit" << std::endl;
+    }
+
+    memcpy( mOldKbdState, mKbdState, numScancodes / sizeof( uint8_t ) );
 }
 
 void Input::mPollDisplay()
diff --git a/Aeon/Input/Input.hpp b/Aeon/Input/Input.hpp
index 95a47cd..7a60598 100644
--- a/Aeon/Input/Input.hpp
+++ b/Aeon/Input/Input.hpp
@@ -15,8 +15,8 @@ public:
 	~Input();
 
 	void PollInput();
-private:
 
+private:
 	void mPollDisplay();
 	void mPollMouse();
 	void mPollScroll();
@@ -24,8 +24,10 @@ private:
 	void mPollKeyboard();
 
 private:
-
 	SDL_Event mEvent;
+	int numScancodes = 242;
+	const uint8_t* mKbdState;
+	uint8_t* mOldKbdState;
 
 	Aeon::Core::EventDispatcher mDisplayEventDispatcher;
 	Aeon::Core::EventDispatcher mKeyboardEventDispatcher;