ui = {}

function ui.spacer(container, x, y)
	local width = container.width or 0
	local height = container.height or 0
	return x + width, y + height
end
function ui.opaque(container, x, y)
	local material = container.material
	local width = container.width
	local height = container.height
	if type(material) == "IMaterial" then -- FIXME Type name might be wrong
	elseif type(material) == "string" then
		material = Material(material)
	else
		error("Received non meterial object in ui.render.opaque call")
	end
	surface.SetMaterial(material)
	surface.DrawTexturedRect(x, y, width, height)
	return x+width,y+height
end

function ui.color(container, x, y)
	local width = container.width or 0
	local height = container.height or 0
	surface.SetDrawColor(container.r or 255, container.g or 255, 
			container.b or 255, container.a or 255)
	surface.DrawRect(x, y, width, height)
	return x + width, y + height
end

function ui.label(container, x, y)
	surface.SetFont("DermaDefault")
	surface.SetTextColor(255,255,255)
	surface.SetTextPos(x,y)
	surface.DrawText(container.text)
	-- 13 is the font size of DermaDefault
	local width = #container.text * 6
	return x+width,y + 13
end

function ui.layer(container, x, y)
	local ret1 = {}
	local ret2 = {}
	ret1.x, ret1.y = ui.handle(container[1], x, y)
	ret2.x, ret2.y  = ui.handle(container[2], x, y)
	return math.max(ret1.x,ret2.x), math.max(ret1.y, ret2.y)
end

function ui.horizontal(container, x, y)
	local bigy = y
	for i, v in ipairs(container) do
		local ret = {}
		ret.x, ret.y = ui.handle(v,x,y)
		if ret.y > bigy then bigy = ret.y end
		x = ret.x
	end
	return x,bigy
end

function ui.vertical(container, x, y)
	local bigx = x
	for i, v in ipairs(container) do
		local ret = {}
		ret.x, ret.y = ui.handle(v,x,y)
		if ret.x > bigx then bigx = ret.x end
		y = ret.y
	end
	return bigx,y
end

function ui.handle(container, x, y)
	name = container["name"]
	x, y = ui[name](container, x, y)
	return x, y
end