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authororwell96 <orwell@bleipb.de>2018-12-03 23:17:35 +0100
committerorwell96 <orwell@bleipb.de>2018-12-03 23:17:35 +0100
commit8928f78ee6305e29ed8d3b9395fcb6564c984fdf (patch)
treecd250c2b98d7131158e3744efe238780cec73fec /font_metro/textures/font_metro_043d.png
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Merge remote-tracking branch 'upstream/master'HEADmaster
Resolved conflicts by reordering of files
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generated by cgit v1.2.3 (git 2.25.1) at 2024-05-20 17:29:28 +0000
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--- Signal aspect handling.
-- @module advtrains.interlocking.aspect

local registered_groups = {}

local named_aspect_aspfields = {main = true, shunt = true, proceed_as_main = true}

local signal_aspect = {}

local signal_aspect_metatable = {
	__eq = function(asp1, asp2)
		for _, k in pairs {"main", "dst", "shunt", "proceed_as_main"} do
			local v1, v2 = (asp1[k] or false), (asp2[k] or false)
			if v1 ~= v2 then
				return false
			end
		end
		if asp1.group and asp1.group == asp2.group then
			return asp1.name == asp2.name
		end
		return true
	end,
	__index = function(asp, field)
		local method = signal_aspect[field]
		if method then
			return method
		end
		if not named_aspect_aspfields[field] then
			return nil
		end
		local group = registered_groups[rawget(asp, "group")]
		if not group then
			return false
		end
		local aspdef = group.aspects[rawget(asp, "name")]
		if not aspdef then
			return false
		end
		return aspdef[field] or false
	end,
	__tostring = function(asp)
		local st = {}
		if asp.group and asp.name then
			table.insert(st, ("%q in %q"):format(asp.name, asp.group))
		end
		if asp.main then
			table.insert(st, ("current %d"):format(asp.main))
		end
		if asp.main ~= 0 then
			if asp.dst then
				table.insert(st, string.format("next %d", asp.dst))
			end
		end
		if asp.main ~= 0 and asp.proceed_as_main then
			table.insert(st, "proceed as main")
		end
		return ("[%s]"):format(table.concat(st, ", "))
	end,
}

local function quicknew(t)
	return setmetatable(t, signal_aspect_metatable)
end

--- Signal aspect class.
-- @type signal_aspect

--- Return a plain version of the signal aspect.
-- @param[opt=false] raw Bypass metamethods when fetching signal aspects
-- @return A plain copy of the signal aspect object.
function signal_aspect:plain(raw)
	local t = {}
	for _, k in pairs {"main", "dst", "shunt", "proceed_as_main", "group", "name"} do
		local v
		if raw then
			v = rawget(self, k)
		else
			v = self[k]
		end
		t[k] = v
	end
	return t
end

--- Create (or copy) a signal aspect object.
-- Note that signal aspect objects can also be created by calling the `advtrains.interlocking.aspect` table.
-- @return The newly created signal aspect object.
function signal_aspect:new()
	if type(self) ~= "table" then
		return quicknew{}
	end
	local newasp = {}
	for _, k in pairs {"main", "dst"} do
		if type(self[k]) == "table" then
			if self[k].free then
				newasp[k] = self[k].speed
			else
				newasp[k] = 0
			end
		else
			newasp[k] = self[k]
		end
	end
	if type(self.shunt) == "table" then
		newasp.shunt = self.shunt.free
		newasp.proceed_as_main = self.shunt.proceed_as_main
	else
		newasp.shunt = self.shunt
	end
	for _, k in pairs {"group", "name"} do
		newasp[k] = self[k]
	end
	return quicknew(newasp)
end

--- Modify the signal aspect in-place to fit in the specific signal group.
-- @param group The signal group. The `nil` indicates a generic group.
-- @return The (now modified) signal aspect itself.
function signal_aspect:to_group(group)
	local cg = self.group
	local gdef = registered_groups[group]
	if type(self.name) ~= "string" then
		self.name = nil
	end
	if not gdef then