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local guide = require 'parser.guide'
local files = require 'files'
local vm = require 'vm'
local function isFunction(source, offset)
if source.type ~= 'function' then
return false
end
-- 必须点在 `function` 这个单词上才能查找函数引用
return offset >= source.start and offset < source.start + #'function'
end
local function findRef(source, offset, callback)
if source.type ~= 'local'
and source.type ~= 'getlocal'
and source.type ~= 'setlocal'
and source.type ~= 'setglobal'
and source.type ~= 'getglobal'
and source.type ~= 'field'
and source.type ~= 'method'
and source.type ~= 'string'
and source.type ~= 'number'
and source.type ~= 'boolean'
and source.type ~= 'goto'
and source.type ~= 'label'
and not isFunction(source, offset) then
return
end
vm.eachRef(source, function (src)
local root = guide.getRoot(src)
local uri = root.uri
if src.type == 'setfield'
or src.type == 'getfield'
or src.type == 'tablefield' then
callback(src.field, uri)
elseif src.type == 'setindex'
or src.type == 'getindex'
or src.type == 'tableindex' then
callback(src.index, uri)
elseif src.type == 'getmethod'
or src.type == 'setmethod' then
callback(src.method, uri)
else
callback(src, uri)
end
end)
vm.eachDef(source, function (src)
local root = guide.getRoot(src)
local uri = root.uri
if src.type == 'setfield'
or src.type == 'getfield'
or src.type == 'tablefield' then
callback(src.field, uri)
elseif src.type == 'setindex'
or src.type == 'getindex'
or src.type == 'tableindex' then
callback(src.index, uri)
elseif src.type == 'getmethod'
or src.type == 'setmethod' then
callback(src.method, uri)
else
callback(src, uri)
end
end)
end
return function (uri, offset)
local ast = files.getAst(uri)
if not ast then
return nil
end
local results = {}
local mark = {}
guide.eachSourceContain(ast.ast, offset, function (source)
findRef(source, offset, function (target, uri)
if mark[target] then
return
end
mark[target] = true
results[#results+1] = {
target = target,
uri = files.getOriginUri(uri),
}
end)
end)
if #results == 0 then
return nil
end
return results
end
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