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local findResult = require 'matcher.find_result'
local findLib = require 'matcher.find_lib'
local Cache = {}
local OoCache = {}
local function buildArgs(lib, oo)
if not lib.args then
return ''
end
local start
if oo then
start = 2
else
start = 1
end
local strs = {}
for i = start, #lib.args do
local arg = lib.args[i]
if arg.optional then
if i > start then
strs[#strs+1] = ' ['
else
strs[#strs+1] = '['
end
end
if i > start then
strs[#strs+1] = ', '
end
if arg.name then
strs[#strs+1] = ('%s: '):format(arg.name)
end
strs[#strs+1] = arg.type or 'any'
if arg.default then
strs[#strs+1] = ('(%q)'):format(arg.default)
end
if arg.optional == 'self' then
strs[#strs+1] = ']'
end
end
for _, arg in ipairs(lib.args) do
if arg.optional == 'after' then
strs[#strs+1] = ']'
end
end
return table.concat(strs)
end
local function buildReturns(lib)
if not lib.returns then
return ''
end
local strs = {}
for i, rtn in ipairs(lib.returns) do
if rtn.optional then
if i > 1 then
strs[#strs+1] = ' ['
else
strs[#strs+1] = '['
end
end
if i > 1 then
strs[#strs+1] = ', '
end
if rtn.name then
strs[#strs+1] = ('%s: '):format(rtn.name)
end
strs[#strs+1] = rtn.type or 'any'
if rtn.default then
strs[#strs+1] = ('(%q)'):format(rtn.default)
end
if rtn.optional == 'self' then
strs[#strs+1] = ']'
end
end
for _, rtn in ipairs(lib.returns) do
if rtn.optional == 'after' then
strs[#strs+1] = ']'
end
end
return '\n -> ' .. table.concat(strs)
end
local function buildEnum(lib)
if not lib.enums then
return ''
end
local container = table.container()
for _, enum in ipairs(lib.enums) do
if not enum.name or not enum.enum then
goto NEXT_ENUM
end
if not container[enum.name] then
container[enum.name] = {}
if lib.args then
for _, arg in ipairs(lib.args) do
if arg.name == enum.name then
container[enum.name].type = arg.type
break
end
end
end
end
table.insert(container[enum.name], enum)
::NEXT_ENUM::
end
local strs = {}
for name, enums in pairs(container) do
strs[#strs+1] = ('\n%s: %s'):format(name, enums.type or '')
for _, enum in ipairs(enums) do
if enum.default then
strs[#strs+1] = '\n -> '
else
strs[#strs+1] = '\n | '
end
strs[#strs+1] = ('%q -- %s'):format(enum.enum, enum.description or '')
end
end
return table.concat(strs)
end
local function buildFunctionHover(lib, fullKey, oo)
local title = ('function %s(%s)%s'):format(fullKey, buildArgs(lib, oo), buildReturns(lib))
local enum = buildEnum(lib)
local tip = lib.description or ''
return ([[
```lua
%s
```
%s
```lua
%s
```
]]):format(title, tip, enum)
end
local function buildField(lib)
if not lib.fields then
return ''
end
local strs = {}
for _, field in ipairs(lib.fields) do
strs[#strs+1] = ('\n%s: %s -- %s'):format(field.field, field.type, field.description or '')
end
return table.concat(strs)
end
local function buildTableHover(lib, fullKey)
local title = ('table %s'):format(fullKey)
local field = buildField(lib)
local tip = lib.description or ''
return ([[
```lua
%s
```
%s
```lua
%s
```
]]):format(title, tip, field)
end
return function (results, pos)
local result = findResult(results, pos)
if not result then
return nil
end
if result.type ~= 'var' then
return nil
end
local var = result.var
local lib, fullKey, oo = findLib(var)
if not lib then
return nil
end
local cache = oo and OoCache or Cache
if not cache[lib] then
if lib.type == 'function' then
cache[lib] = buildFunctionHover(lib, fullKey, oo) or ''
elseif lib.type == 'table' then
cache[lib] = buildTableHover(lib, fullKey) or ''
elseif lib.type == 'string' then
cache[lib] = lib.description or ''
else
cache[lib] = ''
end
end
return cache[lib]
end
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