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local files = require 'files'
local searcher = require 'core.searcher'
local await = require 'await'
local define = require 'proto.define'
local vm = require 'vm'
local util = require 'utility'
local guide = require 'parser.guide'
local converter = require 'proto.converter'
local infer = require 'core.infer'
local config = require 'config'
local isEnhanced = config.get(nil, 'Lua.color.mode') == 'SemanticEnhanced'
local Care = {}
Care['getglobal'] = function (source, results)
local isLib = vm.isGlobalLibraryName(source[1])
local isFunc = false
local value = source.value
if value and value.type == 'function' then
isFunc = true
elseif source.parent.type == 'call' then
isFunc = true
elseif isEnhanced then
isFunc = infer.hasType(source, 'function')
end
local type = isFunc and define.TokenTypes['function'] or define.TokenTypes.variable
local modifier = isLib and define.TokenModifiers.defaultLibrary or define.TokenModifiers.static
results[#results+1] = {
start = source.start,
finish = source.finish,
type = type,
modifieres = modifier,
}
end
Care['setglobal'] = Care['getglobal']
Care['getmethod'] = function (source, results)
local method = source.method
if method and method.type == 'method' then
results[#results+1] = {
start = method.start,
finish = method.finish,
type = define.TokenTypes.method,
modifieres = source.type == 'setmethod' and define.TokenModifiers.declaration or nil,
}
end
end
Care['setmethod'] = Care['getmethod']
Care['field'] = function (source, results)
local modifiers = 0
if source.parent and source.parent.type == 'tablefield' then
modifiers = define.TokenModifiers.declaration
end
if source.parent then
local value = source.parent.value
if value and value.type == 'function' then
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.method,
modifieres = modifiers,
}
return
end
end
if isEnhanced and infer.hasType(source, 'function') then
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.method,
modifieres = modifiers,
}
return
end
if source.parent.parent.type == 'call' then
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.method,
modifieres = modifiers,
}
return
end
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.property,
modifieres = modifiers,
}
end
Care['getlocal'] = function (source, results)
local loc = source.node
-- 1. 值为函数的局部变量 | Local variable whose value is a function
if loc.refs then
for _, ref in ipairs(loc.refs) do
if ref.value and ref.value.type == 'function' then
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes['function'],
}
return
end
end
end
-- 2. 对象 | Object
if source.parent.type == 'getmethod'
or source.parent.type == 'setmethod'
and source.parent.node == source then
return
end
-- 3. 特殊变量 | Special variable
if source[1] == '_ENV'
or source[1] == 'self' then
return
end
-- 4. 函数的参数 | Function parameters
if loc.parent and loc.parent.type == 'funcargs' then
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.parameter,
modifieres = define.TokenModifiers.declaration,
}
return
end
-- 5. References to other functions
if isEnhanced and infer.hasType(loc, 'function') then
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes['function'],
modifieres = source.type == 'setlocal' and define.TokenModifiers.declaration or nil,
}
return
end
-- 6. Class declaration
if isEnhanced then
-- search all defs
for _, def in ipairs(vm.getDefs(source)) do
if def.bindDocs then
for _, doc in ipairs(def.bindDocs) do
if doc.type == "doc.class" and doc.bindSources then
for _, src in ipairs(doc.bindSources) do
if src == def then
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.class,
}
return
end
end
end
end
end
end
else
-- only search this local
if loc.bindDocs then
for i, doc in ipairs(loc.bindDocs) do
if doc.type == "doc.class" and doc.bindSources then
for _, src in ipairs(doc.bindSources) do
if src == loc then
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.class,
}
return
end
end
end
end
end
end
-- 6. const 变量 | Const variable
if loc.attrs then
for _, attr in ipairs(loc.attrs) do
local name = attr[1]
if name == 'const' then
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.variable,
modifieres = define.TokenModifiers.static,
}
return
elseif name == 'close' then
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.variable,
modifieres = define.TokenModifiers.abstract,
}
return
end
end
end
-- 7. 函数调用 | Function call
if source.parent.type == 'call'
and source.parent.node == source then
return
end
local isLocal = loc.parent ~= guide.getRoot(loc)
-- 8. 其他 | Other
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.variable,
modifieres = isLocal and define.TokenModifiers['local'] or nil,
}
end
Care['setlocal'] = Care['getlocal']
Care['local'] = function (source, results) -- Local declaration, i.e. "local x", "local y = z", or "local function() end"
if source[1] == '_ENV'
or source[1] == 'self' then
return
end
if source.parent and source.parent.type == 'funcargs' then
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.parameter,
modifieres = define.TokenModifiers.declaration,
}
return
end
if source.value then
local isFunction = false
if isEnhanced then
isFunction = source.value.type == 'function' or infer.hasType(source.value, 'function')
else
isFunction = source.value.type == 'function'
end
if isFunction then
-- Function declaration, either a new one or an alias for another one
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes['function'],
modifieres = define.TokenModifiers.declaration,
}
return
end
end
if source.value and source.value.type == 'table' and source.bindDocs then
for _, doc in ipairs(source.bindDocs) do
if doc.type == "doc.class" then
-- Class declaration (explicit)
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.class,
modifieres = define.TokenModifiers.declaration,
}
return
end
end
end
if source.attrs then
for _, attr in ipairs(source.attrs) do
local name = attr[1]
if name == 'const' then
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.variable,
modifieres = define.TokenModifiers.declaration | define.TokenModifiers.static,
}
return
elseif name == 'close' then
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.variable,
modifieres = define.TokenModifiers.declaration | define.TokenModifiers.abstract,
}
return
end
end
end
local isLocal = source.parent ~= guide.getRoot(source)
local modifiers = define.TokenModifiers.declaration
if isLocal then
modifiers = modifiers | define.TokenModifiers.definition
end
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.variable,
modifieres = modifiers,
}
end
Care['doc.return.name'] = function (source, results)
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.parameter,
}
end
Care['doc.tailcomment'] = function (source, results)
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.comment,
}
end
Care['doc.type.name'] = function (source, results)
if source.typeGeneric then
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.macro,
}
end
end
Care['nonstandardSymbol.comment'] = function (source, results)
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.comment,
}
end
Care['nonstandardSymbol.continue'] = function (source, results)
results[#results+1] = {
start = source.start,
finish = source.finish,
type = define.TokenTypes.keyword,
}
end
local function buildTokens(uri, results)
local tokens = {}
local lastLine = 0
local lastStartChar = 0
for i, source in ipairs(results) do
local startPos = converter.packPosition(uri, source.start)
local finishPos = converter.packPosition(uri, source.finish)
local line = startPos.line
local startChar = startPos.character
local deltaLine = line - lastLine
local deltaStartChar
if deltaLine == 0 then
deltaStartChar = startChar - lastStartChar
else
deltaStartChar = startChar
end
lastLine = line
lastStartChar = startChar
-- see https://microsoft.github.io/language-server-protocol/specifications/specification-3-16/#textDocument_semanticTokens
local len = i * 5 - 5
tokens[len + 1] = deltaLine
tokens[len + 2] = deltaStartChar
tokens[len + 3] = finishPos.character - startPos.character -- length
tokens[len + 4] = source.type
tokens[len + 5] = source.modifieres or 0
end
return tokens
end
config.watch(function (key, value)
if key == 'Lua.color.mode' then
isEnhanced = value == 'SemanticEnhanced'
end
end)
---@async
return function (uri, start, finish)
local state = files.getState(uri)
local text = files.getText(uri)
if not state then
return nil
end
local results = {}
guide.eachSourceBetween(state.ast, start, finish, function (source) ---@async
local method = Care[source.type]
if not method then
return
end
method(source, results)
await.delay()
end)
for _, comm in ipairs(state.comms) do
if comm.type == 'comment.cshort' then
results[#results+1] = {
start = comm.start,
finish = comm.finish,
type = define.TokenTypes.comment,
}
end
end
table.sort(results, function (a, b)
return a.start < b.start
end)
local tokens = buildTokens(uri, results)
return tokens
end
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