-- compatibility functions

function open(url)
	NavigateTo(url, OPEN_NORMAL)
end

function opennew(url)
	NavigateTo(url, OPEN_NEWTAB)
end

function openbg(url)
	NavigateTo(url, OPEN_BACKGROUNDTAB)
end

function statusbar(text)
	SetStatusBarText(text)
end

function setcheck(id, mark)
	SetCheck(id, mark)
end

function togglepref(type, pref, ...)
	local v, i, n, arg
	v = getpref(type, pref)
	if type == TYPE_BOOL then
		setpref(type, pref, not v)
	else
		arg = {...}
		i = 1
		while i <= #arg do
			if v == arg[i] then
				i = i + 1
				if i <= #arg then
					setpref(type, pref, arg[i])
				else
					setpref(type, pref, arg[1])
				end
				break
			end
			i = i + 1
		end
	end
end

function gensub(r, s, h, t)
	local i, j, l
	i = 1
	l = string.len(s)
	while true do
		i, j = string.find(r, t, i, true)
		if i then
			r = string.sub(r, 1, i - 1) .. s .. string.sub(r, j + 1, -1)
			i = i + l
			if type(h) == "number" then
				h = h - 1
				if h == 0 then
					break
				end
			end
		else
			break
		end
	end
	return r;
end

function gsub(r, s, t)
	gensub(r, s, "G", t)
end

function sub(r, s, t)
	gensub(r, s, 1, t)
end

function index(s, t)
	local i
	i = string.find(s, t, 1, true)
	if i then
		return i
	else
		return -1
	end
end

function substr(s, i, n)
	local l
	if type(n) == "number" then
		l = i + n - 1
	else
		l = -1
	end
	return string.sub(s, i, l)
end

function macros(macro)
	plugin("macros", macro)
end