83 lines
2.6 KiB
Lua
83 lines
2.6 KiB
Lua
local lpeg = require("lpeg")
|
|
lpeg.locale(lpeg)
|
|
local V,P,C,S,B,Cs = lpeg.V,lpeg.P,lpeg.C,lpeg.S,lpeg.B,lpeg.Cs
|
|
--Characters to escape in the body text
|
|
local escapes = {
|
|
["&"] = "&",
|
|
["<"] = "<",
|
|
[">"] = ">",
|
|
}
|
|
local esctbl = {}
|
|
for char,_ in pairs(escapes) do
|
|
table.insert(esctbl,char)
|
|
end
|
|
local escapematch = string.format("([%s])",table.concat(esctbl))
|
|
local function sanitize_item(capture)
|
|
return escapes[capture] or capture
|
|
end
|
|
local function sanitize(text)
|
|
local ret,_ = string.gsub(text,escapematch,sanitize_item)
|
|
return ret
|
|
end
|
|
|
|
--Grammar
|
|
local space = S" \t\r"^0
|
|
local special = P{
|
|
P"**" + P"''" + P"'''" +
|
|
P"__" + P"==" + P"~~" +
|
|
P"\n>" + P"\n<" + P"\n" +
|
|
P"[code]" + P"[spoiler]"
|
|
}
|
|
local word = Cs((1 - special)^1) * space / sanitize
|
|
|
|
--Generates a pattern that formats text inside matching 'seq' tags with format
|
|
--ex wrap("^^",[[<sup>%s</sup>]])
|
|
--will wrap text "5^^3^^" as "5<sup>3</sup>"
|
|
local function wrap(seq,format)
|
|
return P(seq) * Cs(((V"marked" + word + P"\n"))^1) * P(seq) / function(a)
|
|
return string.format(format,a)
|
|
end
|
|
end
|
|
|
|
--Generates a pattern that formats text inside opening and closing "name" tags
|
|
--with a format, BB forum style
|
|
local function tag(name,format)
|
|
local start_tag = P(string.format("[%s]",name))
|
|
local end_tag = P(string.format("[/%s]",name))
|
|
return start_tag * Cs(((1 - end_tag))^1) * end_tag / function(a)
|
|
print("sanatizing tag:",name,"data:",a)
|
|
return string.format(format,sanitize(a))
|
|
end
|
|
end
|
|
|
|
local grammar = P{
|
|
"chunk";
|
|
--regular
|
|
spoiler = wrap("**",[[<span class="spoiler">%s</span>]]),
|
|
spoiler2 = tag("spoiler",[[<span class="spoiler2">%s</span>]]),
|
|
italic = wrap("''",[[<i>%s</i>]]),
|
|
bold = wrap("'''",[[<b>%s</b>]]),
|
|
underline = wrap("__",[[<u>%s</u>]]),
|
|
heading = wrap("==",[[<h2>%s</h2>]]),
|
|
strike = wrap("~~",[[<s>%s</s>]]),
|
|
code = tag("code",[[<pre><code>%s</code></pre>]]),
|
|
greentext = P">" * (B"\n>" + B">") * Cs((V"marked" + word)^0) / function(a)
|
|
return string.format([[<span class="greentext">>%s</span>]],a)
|
|
end,
|
|
pinktext = P"<" * (B"\n<" + B"<") * Cs((V"marked" + word)^0) / function(a)
|
|
return string.format([[<span class="pinktext"><%s</span>]],a)
|
|
end,
|
|
marked = V"spoiler" + V"bold" + V"italic" + V"underline" + V"heading" + V"strike" + V"spoiler2" + V"code",
|
|
plainline = (V"marked" + word)^0,
|
|
line = Cs(V"greentext" + V"pinktext" + V"plainline" + P"") * P"\n" / function(a)
|
|
print("matched line:",a)
|
|
return string.format("<p>%s",a)
|
|
end,
|
|
ending = C(P(1)^0) / function(a) print("failed with ending:", a) return sanitize(a) end,
|
|
chunk = V"line"^0 * V"plainline" * V"ending"
|
|
}
|
|
|
|
return function(text)
|
|
return table.concat({grammar:match(text .. "\n")}," ")
|
|
end
|