add help page and hidden mode

1 files changed, 17 insertions, 9 deletions

diff --git a/language.lua b/language.lua
index cf6725f..b6a2f77 100644
--- a/language.lua
+++ b/language.lua
@@ -53,8 +53,12 @@ end
 local function parse_syllables(str)
 	local syllables = {}
 	for line in lines(str) do
-		line = string.gsub(line, "%s", "")
-		table.insert(syllables, string_to_array(line))
+		if string.match(line, "^%s*$") then
+			-- ignore blank lines
+		else
+			line = string.gsub(line, "%s", "")
+			table.insert(syllables, string_to_array(line))
+		end
 	end
 	return syllables
 end
@@ -70,13 +74,17 @@ local function parse_orthography(str, phonemes)
 			-- trim whitespace
 			line = string.gsub(line, "%s*$", "")
 			local pattern, replace = string.match(line, "(.*)=(.*)")
-			pattern = string.gsub(pattern, "%%(.)", function(class)
-				if phonemes[class] == nil then
-					return '%' .. class
-				end
-				return '[' .. table.concat(phonemes[class], '') .. ']'
-			end)
-			table.insert(rules, { pattern=pattern, replace=replace })
+			if not pattern then
+				-- ???
+			else
+				pattern = string.gsub(pattern, "%%(.)", function(class)
+					if phonemes[class] == nil then
+						return '%' .. class
+					end
+					return '[' .. table.concat(phonemes[class], '') .. ']'
+				end)
+				table.insert(rules, { pattern=pattern, replace=replace })
+			end
 		end
 	end
 	return rules