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local vm = require 'vm'
local util = require 'utility'
local config = require 'config'
local infer = require 'vm.infer'
local await = require 'await'
local guide = require 'parser.guide'
local function formatKey(key)
if type(key) == 'string' then
if key:match '^[%a_][%w_]*$' then
return key
else
return ('[%s]'):format(util.viewLiteral(key))
end
end
return ('[%s]'):format(key)
end
local function buildAsHash(keys, typeMap, literalMap, optMap, reachMax)
local lines = {}
lines[#lines+1] = '{'
for _, key in ipairs(keys) do
local typeView = typeMap[key]
local literalView = literalMap[key]
if literalView then
lines[#lines+1] = (' %s%s: %s = %s,'):format(
formatKey(key),
optMap[key] and '?' or '',
typeView,
literalView)
else
lines[#lines+1] = (' %s%s: %s,'):format(
formatKey(key),
optMap[key] and '?' or '',
typeView
)
end
end
if reachMax > 0 then
lines[#lines+1] = (' ...(+%d)'):format(reachMax)
end
lines[#lines+1] = '}'
return table.concat(lines, '\n')
end
local function buildAsConst(keys, typeMap, literalMap, optMap, reachMax)
table.sort(keys, function (a, b)
return tonumber(literalMap[a]) < tonumber(literalMap[b])
end)
local lines = {}
lines[#lines+1] = '{'
for _, key in ipairs(keys) do
local typeView = typeMap[key]
local literalView = literalMap[key]
if literalView then
lines[#lines+1] = (' %s%s: %s = %s,'):format(
formatKey(key),
optMap[key] and '?' or '',
typeView,
literalView
)
else
lines[#lines+1] = (' %s%s: %s,'):format(
formatKey(key),
optMap[key] and '?' or '',
typeView
)
end
end
if reachMax > 0 then
lines[#lines+1] = (' ...(+%d)'):format(reachMax)
end
lines[#lines+1] = '}'
return table.concat(lines, '\n')
end
local typeSorter = {
['string'] = 1,
['number'] = 2,
['boolean'] = 3,
}
local function getKeyMap(fields)
local keys = {}
local map = {}
for _, field in ipairs(fields) do
local key = vm.getKeyName(field)
if key and not map[key] then
map[key] = true
keys[#keys+1] = key
end
end
table.sort(keys, function (a, b)
if a == b then
return false
end
local ta = type(a)
local tb = type(b)
local tsa = typeSorter[ta]
local tsb = typeSorter[tb]
if tsa == tsb then
if ta == 'boolean' then
return a == true
end
return a < b
else
return tsa < tsb
end
end)
return keys, map
end
local function getOptMap(fields, keyMap)
local optMap = {}
for _, field in ipairs(fields) do
if field.type == 'doc.field' then
if field.optional then
local key = vm.getKeyName(field)
if keyMap[key] then
optMap[key] = true
end
end
end
if field.type == 'doc.type.field' then
if field.optional then
local key = vm.getKeyName(field)
if keyMap[key] then
optMap[key] = true
end
end
end
end
return optMap
end
---@async
local function getInferMap(fields, keyMap)
---@type table<string, vm.infer>
local inferMap = {}
for _, field in ipairs(fields) do
local key = vm.getKeyName(field)
if not keyMap[key] then
goto CONTINUE
end
await.delay()
local ifr = infer.getInfer(field)
if inferMap[key] then
inferMap[key] = inferMap[key]:merge(ifr)
else
inferMap[key] = ifr
end
::CONTINUE::
end
return inferMap
end
---@async
---@return string?
return function (source)
local uri = guide.getUri(source)
local maxFields = config.get(uri, 'Lua.hover.previewFields')
if maxFields <= 0 then
return nil
end
for view in infer.getInfer(source):eachView() do
if view == 'string'
or vm.isSubType(view, 'string') then
return nil
end
end
local fields = vm.getFields(source)
local keys, map = getKeyMap(fields)
if #keys == 0 then
return nil
end
local reachMax = #keys - maxFields
if #keys > maxFields then
for i = maxFields + 1, #keys do
map[keys[i]] = nil
keys[i] = nil
end
end
local optMap = getOptMap(fields, map)
local inferMap = getInferMap(fields, map)
local typeMap = {}
local literalMap = {}
local isConsts = true
for i = 1, #keys do
await.delay()
local key = keys[i]
typeMap[key] = inferMap[key]:view('unknown', uri)
literalMap[key] = inferMap[key]:viewLiterals()
if not tonumber(literalMap[key]) then
isConsts = false
end
end
local result
if isConsts then
result = buildAsConst(keys, typeMap, literalMap, optMap, reachMax)
else
result = buildAsHash(keys, typeMap, literalMap, optMap, reachMax)
end
--if timeUp then
-- result = ('\n--%s\n%s'):format(lang.script.HOVER_TABLE_TIME_UP, result)
--end
return result
end
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