constants = {
	my_modifier = 9;
};

enums = {
	namespaces: ["stdin", "clickpad", "variable"];
	variables: ["num_touches"];
};

predicates = {
	is_evdev = {
		type = "code_ns";
		min = "namespaces.clickpad";
		max = "namespaces.clickpad";
	};
	key_event = {
		type = "and";
		args = (
			"is_evdev",
			{
				type = "code_major";
				min = "event_type.KEY";
				max = "event_type.KEY";
			}
		);
	};
	abs_event = {
		type = "and";
		args = (
			"is_evdev",
			{
				type = "code_major";
				min = "event_type.ABS";
				max = "event_type.ABS";
			}
		);
	};
	btn_touch_event = {
		type = "and";
		args = (
			"key_event",
			{
				type = "code_minor";
				min = "button_event.TOUCH";
				max = "button_event.TOUCH";
			}
		);
	};
	touch_tracking_id = {
		type = "and";
		args = (
			"abs_event",
			{
				type = "code_minor";
				min = "absolute_axis.MT_TRACKING_ID";
				max = "absolute_axis.MT_TRACKING_ID";
			}
		);
	};
	payload_zero = {
		type = "payload";
		min = 0;
		max = 0;
	};
	payload_one = {
		type = "payload";
		min = 1;
		max = 1;
	};
	payload_negative = {
		type = "payload";
		max = -1;
	};
	payload_nonnegative = {
		type = "payload";
		min = 0;
	};
	touch_start = {
		type = "and";
		args = ["touch_tracking_id", "payload_nonnegative"];
	};
	touch_end = {
		type = "and";
		args = ["touch_tracking_id", "payload_negative"];
	};
	touch_held = {
		type = "accept";
		inverted = 1;
	};
};

nodes = {
	stdin = {
		type = "getchar";
		options = {
			namespace = "namespaces.stdin";
		};
	};
	print = {
		type = "print";
		options = {};
	};
	clickpad = {
		type = "evdev";
		options = {
			file = "/dev/input/event7";
			namespace = "namespaces.clickpad";
			// grab = 1;
		};
	};
	select_key_events = {
		type = "router";
		options = {
			predicates = (
				"key_event",
				{
					type = "or";
					inverted = 1;
					args = ["key_event"];
				},
				"touch_start",
				"touch_end"
			);
		};
	};
	set_modifier = {
		type = "modifiers";
		options = {
			operation = "set";
			modifiers = ["my_modifier"];
		};
	};
	update_touch_held = {
		type = "modify_predicate";
		options = {
			target = "touch_held";
			uninvert_on = {type: "and", args: ["btn_touch_event", "payload_one"]};
			invert_on = {type: "and", args: ["btn_touch_event", "payload_zero"]};
		};
	};
	while_touch_held = {
		type = "router";
		options = {
			predicates = ["touch_held"];
		};
	};
	uinput_output = {
		type = "uinput";
		options = {
			name = "Resulting device";
			enabled_codes = (
				{major: "event_type.KEY"; minor: "button_event.LEFT"}
				,
				{major: "event_type.KEY"; minor: "button_event.RIGHT"}
				,
				{major: "event_type.ABS"; minor: "absolute_axis.X"; data: {minimum: 0; maximum: 3200; resolution: 0}}
			);
		};
	};
	set_one = {
		type = "assign";
		options = {
			payload = 1;
		};
	};
	count_touches = {
		// This exact usecase may be implemented using events like button_event.TOOL_DOUBLETAP, button_event.TOOL_TRIPLETAP, button_event.TOOL_QUADTAP, button_event.TOOL_QUINTTAP
		type = "integrate";
	};
	set_variable_num_touches = {
		type = "assign";
		options = {
			namespace = "namespaces.variable";
			major = "variables.num_touches";
			minor = 0;
		};
	};
};

channels = ({
	from: ("stdin", 0);
	to: ("select_key_events", 0);
}, {
	from: ("clickpad", 0);
	to: ("select_key_events", 1);
}, {
	from: ("select_key_events", 0);
	to: ("set_modifier", 0);
}, {
	from: ("set_modifier", 0);
	to: ("print", 0);
}, {
	from: ("select_key_events", 1);
	to: ("while_touch_held", 0);
}, {
	from: ("while_touch_held", 0);
	to: ("print", 1);
}, {
	from: ("clickpad", 1);
	to: ("update_touch_held", 0);
}, {
	from: ("select_key_events", 2);  // touch_start
	to: ("set_one", 0);
}, {
	from: ("set_one", 0);
	to: ("count_touches", 0);
}, {
	from: ("select_key_events", 3);  // touch_end
	to: ("count_touches", 1);
}, {
	from: ("count_touches", 0);
	to: ("set_variable_num_touches", 0);
}, {
	from: ("set_variable_num_touches", 0);
	to: ("print", 2);
});

// vim: ft=libconfig