BT411/engine/MUNGA_L4/L4PADBINDINGS.h

#pragma once

//###########################################################################
//
// L4PADBINDINGS -- the PadRIO input-binding profile (BT_GLASS only).
//
// Maps PC keyboard keys and XInput pad controls onto the pod's abstract
// control surface: RIO button addresses (buttonGroup elements), MFD keypad
// units, and the five analog channels (Throttle, JoystickX/Y, Left/Right
// Pedal).  The profile is read from "bindings.txt" in the working directory
// (content\); a self-documenting default file is written on first run.
// Grammar (one binding per line, '#' comments):
//
//    key     <KEYNAME> button <addr>
//    key     <KEYNAME> keypad <unit> <key>
//    key     <KEYNAME> axis <channel> deflect <+|-> <rate>
//    key     <KEYNAME> axis <channel> slew    <+|-> <rate>
//    key     <KEYNAME> axis <channel> set <value>
//    pad     <PADBTN>  button <addr>
//    padaxis <PADAXIS> axis <channel> [invert] [slew <rate>]
//    joydev  <slot 0-3> [product-name substring...]
//    joyaxis <JOYAXIS> axis <channel> [invert] [slew <rate>] [deadzone <f>]
//    joybutton <n> button <addr>
//    joybutton <n> keypad <unit> <key>
//    joyhat  <n> <up|down|left|right> button <addr>
//
// deflect = held drives the channel toward +/-1 at <rate>/s, auto-centers
//           on release (the spring-centered stick model).
// slew    = held moves the channel at <rate>/s and it STAYS (the throttle
//           lever model).
// set     = press jumps the channel to <value> (all-stop detent).
//
// joy* rows (generic DirectInput joysticks -- flight sticks, HOTAS,
// pedals; L4JOY.h) attach to the most recent joydev slot (slot 0 if none
// given).  A slot with a name substring binds THAT device; without one it
// binds the Nth attached non-XInput device.  JOYAXIS names follow the
// DirectInput layout: X Y Z RX RY RZ SL0 SL1 (twist is usually RZ, a
// HOTAS throttle usually Z or SL0).  A direct (non-slew) joyaxis on the
// Throttle channel maps the full axis travel onto the 0..1 lever (a
// physical lever OWNS the channel); other channels follow the pad model
// (outside the deadzone owns the channel).  BT_JOYCONFIG=1 generates
// these rows interactively.
//
//###########################################################################

class PadBindingProfile
{
public:
	enum Channel {
		ChannelThrottle = 0,
		ChannelJoystickX,
		ChannelJoystickY,
		ChannelLeftPedal,
		ChannelRightPedal,
		// issue #25: composite -- a SIGNED axis that decomposes into the
		// pedal pair (positive = right pedal, negative = left pedal) so a
		// gamepad stick can drive the turn ("twin-stick" profile).
		ChannelTurn,
		ChannelCount
	};

	enum ActionKind {
		ActionButton,		// RIO button address (buttonGroup element)
		ActionKeypad,		// MFD keypad unit + key
		ActionAxisDeflect,
		ActionAxisSlew,
		ActionAxisSet
	};

	struct Action
	{
		ActionKind	kind;
		int			address;	// ActionButton: RIO address; ActionKeypad: unit
		int			key;		// ActionKeypad: key number (0-9=digits, 10+=A..)
		int			channel;	// ActionAxis*: Channel
		float		rate;		// deflect/slew: units per second (signed);
								// set: the target value
	};

	struct KeyBinding
	{
		int		virtualKey;		// Win32 VK code
		Action	action;
	};

	struct PadButtonBinding
	{
		unsigned	buttonMask;	// XINPUT_GAMEPAD_* bit
		Action		action;		// ActionButton / ActionKeypad only
	};

	enum PadAxis {
		PadAxisLX = 0, PadAxisLY, PadAxisRX, PadAxisRY,
		PadAxisLT, PadAxisRT,
		PadAxisCount
	};

	struct PadAxisBinding
	{
		int		axis;			// PadAxis
		int		channel;		// Channel
		int		invert;			// flip the sign
		int		slew;			// 0 = direct absolute, 1 = value drives d/dt
		float	slewRate;		// full-deflection slew speed (units/s)
	};

	//
	// Generic-joystick bindings (DirectInput devices -- L4JOY.h).  device
	// is a joydev SLOT (0-3), resolved at poll time by the slot's name
	// substring (or ordinal when the slot has none).
	//
	enum { JoyDeviceSlots = 4 };

	enum JoyAxis {
		JoyAxisX = 0, JoyAxisY, JoyAxisZ,
		JoyAxisRX, JoyAxisRY, JoyAxisRZ,
		JoyAxisSL0, JoyAxisSL1,
		JoyAxisCount
	};

	struct JoyAxisBinding
	{
		int		device;			// joydev slot
		int		axis;			// JoyAxis
		int		channel;		// Channel
		int		invert;
		int		slew;
		float	slewRate;
		float	deadzone;		// 0..1 fraction (rescaled past it)
	};

	struct JoyButtonBinding
	{
		int		device;			// joydev slot
		int		button;			// 0-31
		Action	action;			// ActionButton / ActionKeypad only
	};

	struct JoyHatBinding
	{
		int		device;			// joydev slot
		int		hat;			// 0-3
		int		direction;		// 0 up / 1 right / 2 down / 3 left
		Action	action;			// ActionButton only
	};

	PadBindingProfile();
	~PadBindingProfile();

	//
	// Load "bindings.txt" from the working directory; if it does not exist,
	// write the default profile there first (self-documenting).  Always
	// leaves a usable profile (falls back to built-in defaults on a
	// malformed file, logging each rejected line).
	//
	void
		Load();

	int				keyBindingCount;
	KeyBinding		keyBindings[192];
	int				padButtonBindingCount;
	PadButtonBinding padButtonBindings[32];
	int				padAxisBindingCount;
	PadAxisBinding	padAxisBindings[12];

	int				joyAxisBindingCount;
	JoyAxisBinding	joyAxisBindings[24];
	int				joyButtonBindingCount;
	JoyButtonBinding joyButtonBindings[48];
	int				joyHatBindingCount;
	JoyHatBinding	joyHatBindings[16];
	char			joyDeviceMatch[JoyDeviceSlots][64];	// "" = ordinal slot

protected:
	int				parseJoyDevice;		// joydev slot for subsequent joy rows

	void
		LoadDefaults();
	void
		WriteDefaultFile(const char *path);
	int
		ParseLine(char *line, int line_number);
};