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local getFunctionHover = require 'core.hover.function'
local getFunctionHoverAsLib = require 'core.hover.lib_function'
local findLib = require 'core.find_lib'
local buildValueName = require 'core.hover.name'
local findSource = require 'core.find_source'
local function findCall(vm, pos)
local results = {}
for _, src in ipairs(vm.sources) do
if src.type == 'call'
and src.start <= pos
and src.finish >= pos
then
results[#results+1] = src
end
end
if #results == 0 then
return nil
end
-- 可能处于 'func1(func2(' 的嵌套中，将最近的call放到最前面
table.sort(results, function (a, b)
return a.start > b.start
end)
return results
end
local function getSelect(args, pos)
if not args then
return 1
end
for i, arg in ipairs(args) do
if arg.start <= pos and arg.finish >= pos - 1 then
return i
end
end
return #args + 1
end
local function getFunctionSource(call)
local simple = call:get 'simple'
for i, source in ipairs(simple) do
if source == call then
return simple[i-1]
end
end
return nil
end
local function getHover(call, pos)
local func, args = call:bindCall()
if not func then
return
end
local select = getSelect(args, pos)
local source = getFunctionSource(call)
local object = source:get 'object'
local lib, fullkey = findLib(source)
local name = fullkey or buildValueName(source)
local hover
if lib then
hover = getFunctionHoverAsLib(name, lib, object, select)
else
hover = getFunctionHover(name, func:getFunction(), object, select)
end
if hover and hover.argLabel then
return hover
end
end
local function isInFunctionOrTable(call, pos)
local func, args = call:bindCall()
if not func then
return false
end
local select = getSelect(args, pos)
local arg = args[select]
if not arg then
return false
end
if arg.type == 'function' or arg.type == 'table' then
return true
end
return false
end
return function (vm, pos)
local source = findSource(vm, pos) or findSource(vm, pos-1)
if not source or source.type == 'string' then
return
end
local calls = findCall(vm, pos)
if not calls or #calls == 0 then
return nil
end
local nearCall = calls[1]
if isInFunctionOrTable(nearCall, pos) then
return nil
end
local hovers = {}
for _, call in ipairs(calls) do
hovers[#hovers+1] = getHover(call, pos)
end
if #hovers == 0 then
return nil
end
return hovers
end
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