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local files = require 'files'
local infer = require 'core.infer'
local vm = require 'vm'
local config = require 'config'
local guide = require 'parser.guide'
local function typeHint(uri, edits, start, finish)
local ast = files.getState(uri)
if not ast then
return
end
local mark = {}
guide.eachSourceBetween(ast.ast, start, finish, function (source)
if source.type ~= 'local'
and source.type ~= 'setglobal'
and source.type ~= 'tablefield'
and source.type ~= 'tableindex'
and source.type ~= 'setfield'
and source.type ~= 'setindex' then
return
end
if source.dummy then
return
end
if source[1] == '_' then
return
end
if source.value and guide.isLiteral(source.value) then
return
end
if source.parent.type == 'funcargs' then
if not config.get 'Lua.hint.paramType' then
return
end
else
if not config.get 'Lua.hint.setType' then
return
end
end
local view = infer.searchAndViewInfers(source)
if view == 'any'
or view == 'nil' then
return
end
local src = source
if source.type == 'tablefield' then
src = source.field
elseif source.type == 'tableindex' then
src = source.index
end
if not src then
return
end
if mark[src] then
return
end
mark[src] = true
edits[#edits+1] = {
newText = (':%s'):format(view),
start = src.finish,
finish = src.finish,
}
end)
end
local function getArgNames(func)
if not func.args or #func.args == 0 then
return nil
end
local names = {}
if func.parent.type == 'setmethod' then
names[#names+1] = 'self'
end
for _, arg in ipairs(func.args) do
if arg.type == '...' then
break
end
names[#names+1] = arg[1] or ''
end
if #names == 0 then
return nil
end
return names
end
local function hasLiteralArgInCall(call)
if not call.args then
return false
end
for _, arg in ipairs(call.args) do
if guide.isLiteral(arg) then
return true
end
end
return false
end
local function paramName(uri, edits, start, finish)
if not config.get 'Lua.hint.paramName' then
return
end
local ast = files.getState(uri)
if not ast then
return
end
local mark = {}
guide.eachSourceBetween(ast.ast, start, finish, function (source)
if source.type ~= 'call' then
return
end
if not hasLiteralArgInCall(source) then
return
end
local defs = vm.getDefs(source.node)
if not defs then
return
end
local args
for _, def in ipairs(defs) do
if def.value then
def = def.value
end
if def.type == 'function' then
args = getArgNames(def)
if args then
break
end
end
end
if not args then
return
end
if source.node and source.node.type == 'getmethod' then
table.remove(args, 1)
end
for i, arg in ipairs(source.args) do
if not mark[arg] and guide.isLiteral(arg) then
mark[arg] = true
if args[i] and args[i] ~= '' then
edits[#edits+1] = {
newText = ('%s:'):format(args[i]),
start = arg.start,
finish = arg.start - 1,
}
end
end
end
end)
end
return function (uri, start, finish)
local edits = {}
typeHint(uri, edits, start, finish)
paramName(uri, edits, start, finish)
return edits
end
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