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-- mod-version:3
local core = require "core"
local style = require "core.style"
local config = require "core.config"
local common = require "core.common"
local command = require "core.command"
local tokenizer = require "core.tokenizer"
local Highlighter = require "core.doc.highlighter"
config.plugins.rainbowparen = common.merge({
enabled = true,
parens = 5
}, config.plugins.rainbowparen)
style.syntax.paren_unbalanced = style.syntax.paren_unbalanced or { common.color "#DC0408" }
style.syntax.paren1 = style.syntax.paren1 or { common.color "#FC6F71"}
style.syntax.paren2 = style.syntax.paren2 or { common.color "#fcb053"}
style.syntax.paren3 = style.syntax.paren3 or { common.color "#fcd476"}
style.syntax.paren4 = style.syntax.paren4 or { common.color "#52dab2"}
style.syntax.paren5 = style.syntax.paren5 or { common.color "#5a98cf"}
local tokenize = tokenizer.tokenize
local extract_subsyntaxes = tokenizer.extract_subsyntaxes
local closers = {
["("] = ")",
["["] = "]",
["{"] = "}"
}
local function parenstyle(parenstack)
return "paren" .. ((#parenstack % config.plugins.rainbowparen.parens) + 1)
end
function tokenizer.extract_subsyntaxes(base_syntax, state)
if not config.plugins.rainbowparen.enabled then
return extract_subsyntaxes(base_syntax, state)
end
return extract_subsyntaxes(base_syntax, state.istate)
end
function tokenizer.tokenize(syntax, text, state)
if not config.plugins.rainbowparen.enabled then
return tokenize(syntax, text, state)
end
state = state or {}
local res, istate = tokenize(syntax, text, state.istate)
local parenstack = state.parenstack or ""
local newres = {}
-- split parens out
-- the stock tokenizer can't do this because it merges identical adjacent tokens
for i, type, text in tokenizer.each_token(res) do
if type == "normal" or type == "symbol" then
for normtext1, paren, normtext2 in text:gmatch("([^%(%[{}%]%)]*)([%(%[{}%]%)]?)([^%(%[{}%]%)]*)") do
if #normtext1 > 0 then
table.insert(newres, type)
table.insert(newres, normtext1)
end
if #paren > 0 then
if paren == parenstack:sub(-1) then -- expected closer
parenstack = parenstack:sub(1, -2)
table.insert(newres, parenstyle(parenstack))
elseif closers[paren] then -- opener
table.insert(newres, parenstyle(parenstack))
parenstack = parenstack .. closers[paren]
else -- unexpected closer
table.insert(newres, "paren_unbalanced")
end
table.insert(newres, paren)
end
if #normtext2 > 0 then
table.insert(newres, type)
table.insert(newres, normtext2)
end
end
else
table.insert(newres, type)
table.insert(newres, text)
end
end
return newres, { parenstack = parenstack, istate = istate }
end
local function toggle_rainbowparen(enabled)
config.plugins.rainbowparen.enabled = enabled
for _, doc in ipairs(core.docs) do
doc.highlighter = Highlighter(doc)
doc:reset_syntax()
end
end
-- The config specification used by the settings gui
config.plugins.rainbowparen.config_spec = {
name = "Rainbow Parentheses",
{
label = "Enable",
description = "Activates rainbow parenthesis coloring by default.",
path = "enabled",
type = "toggle",
default = true,
on_apply = function(enabled)
toggle_rainbowparen(enabled)
end
}
}
command.add(nil, {
["rainbow-parentheses:toggle"] = function()
toggle_rainbowparen(not config.plugins.rainbowparen.enabled)
end
})
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