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local hover = require 'matcher.hover'
local function isContainPos(obj, pos)
if obj.start <= pos and obj.finish + 1 >= pos then
return true
end
return false
end
local function findArgCount(args, pos)
for i, arg in ipairs(args) do
if isContainPos(arg, pos) then
return i, arg
end
end
return #args + 1, nil
end
-- 找出范围包含pos的call
local function findCall(vm, pos)
local results = {}
for _, call in ipairs(vm.results.calls) do
if isContainPos(call.args, pos) then
local n, arg = findArgCount(call.args, pos)
if arg and arg.type == 'string' then
return nil
end
local var = vm.results.sources[call.lastObj]
if var then
results[#results+1] = {
func = call.func,
var = var,
source = call.lastObj,
select = n,
args = call.args,
}
end
end
end
-- 可能处于 'func1(func2(' 的嵌套中，因此距离越远的函数层级越低
table.sort(results, function (a, b)
return a.args.start < b.args.start
end)
return results
end
return function (vm, pos)
local calls = findCall(vm, pos)
if not calls or #calls == 0 then
return nil
end
local hovers = {}
for _, call in ipairs(calls) do
local hvr = hover(call.var, call.source, nil, call.select)
if hvr and hvr.argLabel then
hovers[#hovers+1] = hvr
end
end
if #hovers == 0 then
return nil
end
return hovers
end
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