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examples/cs2-silent-aim-master/cstrike/utilities/inputsystem.h

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+#pragma once
+// used: [win] winapi
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+
+#include "../common.h"
+// used: keybind_t
+#include "../core/config.h"
+
+/*
+ * INPUT SYSTEM
+ * listen and handle key states
+ */
+namespace IPT
+{
+	using KeyState_t = std::uint8_t;
+
+	enum EKeyState : KeyState_t
+	{
+		KEY_STATE_NONE,
+		KEY_STATE_DOWN,
+		KEY_STATE_UP,
+		KEY_STATE_RELEASED
+	};
+
+	/* @section: values */
+	// current window
+	inline HWND hWindow = nullptr;
+	// saved window messages handler
+	inline WNDPROC pOldWndProc = nullptr;
+	// last processed key states
+	inline KeyState_t arrKeyState[256] = {};
+
+	// replace game window messages processor with our
+	bool Setup();
+	// restore window messages processor to original
+	void Destroy();
+
+	/* @section: callbacks */
+	// process input window message and save keys states in array
+	bool OnWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
+
+	/* @section: get */
+	/// @returns: true if keybind is active, false otherwise
+	bool GetBindState(KeyBind_t& keyBind);
+
+	[[nodiscard]] bool IsHovered(const ImVec2& vecPosition, const ImVec2& vecSize);
+
+	/// @returns: true if key is being held, false otherwise
+	[[nodiscard]] CS_INLINE bool IsKeyDown(const std::uint32_t uButtonCode)
+	{
+		return arrKeyState[uButtonCode] == KEY_STATE_DOWN;
+	}
+
+	/// @returns: true if key has been just released, false otherwise
+	[[nodiscard]] CS_INLINE bool IsKeyReleased(const std::uint32_t uButtonCode)
+	{
+		if (arrKeyState[uButtonCode] == KEY_STATE_RELEASED)
+		{
+			arrKeyState[uButtonCode] = KEY_STATE_UP;
+			return true;
+		}
+
+		return false;
+	}
+}