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local guide = require 'parser.guide'
local workspace = require 'workspace'
local files = require 'files'
local vm = require 'vm'
local findSource = require 'core.find-source'
local function sortResults(results)
-- 先按照顺序排序
table.sort(results, function (a, b)
local u1 = guide.getRoot(a.target).uri
local u2 = guide.getRoot(b.target).uri
if u1 == u2 then
return a.target.start < b.target.start
else
return u1 < u2
end
end)
-- 如果2个结果处于嵌套状态，则取范围小的那个
local lf, lu
for i = #results, 1, -1 do
local res = results[i].target
local f = res.finish
local root = guide.getRoot(res)
local uri = root and root.uri
if lf and f > lf and uri == lu then
table.remove(results, i)
else
lu = uri
lf = f
end
end
end
local accept = {
['local'] = true,
['setlocal'] = true,
['getlocal'] = true,
['label'] = true,
['goto'] = true,
['field'] = true,
['method'] = true,
['setglobal'] = true,
['getglobal'] = true,
['string'] = true,
['boolean'] = true,
['number'] = true,
}
local function checkRequire(source, offset)
if source.type ~= 'string' then
return nil
end
local callargs = source.parent
if callargs.type ~= 'callargs' then
return
end
if callargs[1] ~= source then
return
end
local call = callargs.parent
local func = call.node
local literal = guide.getLiteral(source)
local lib = vm.getLibrary(func)
if not lib then
return nil
end
if lib.name == 'require' then
return workspace.findUrisByRequirePath(literal, true)
elseif lib.name == 'dofile'
or lib.name == 'loadfile' then
return workspace.findUrisByFilePath(literal, true)
end
return nil
end
local function convertIndex(source)
if not source then
return
end
if source.type == 'string'
or source.type == 'boolean'
or source.type == 'number' then
local parent = source.parent
if parent.type == 'setindex'
or parent.type == 'getindex'
or parent.type == 'tableindex' then
return parent
end
end
return source
end
return function (uri, offset)
local ast = files.getAst(uri)
if not ast then
return nil
end
local source = convertIndex(findSource(ast, offset, accept))
if not source then
return nil
end
local results = {}
local uris = checkRequire(source)
if uris then
for i, uri in ipairs(uris) do
results[#results+1] = {
uri = files.getOriginUri(uri),
source = source,
target = {
start = 0,
finish = 0,
}
}
end
end
vm.setSearchLevel(10)
vm.eachDef(source, function (src)
local root = guide.getRoot(src)
if not root then
return
end
src = src.field or src.method or src.index or src
if src.type == 'table' and src.parent.type ~= 'return' then
return
end
results[#results+1] = {
target = src,
uri = files.getOriginUri(root.uri),
source = source,
}
end)
if #results == 0 then
return nil
end
sortResults(results)
return results
end
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