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local guide = require 'parser.guide'
local files = require 'files'
local vm = require 'vm.vm'
local function ofLocal(loc, callback)
-- 方法中的 self 使用了一个虚拟的定义位置
if loc.tag ~= 'self' then
callback(loc)
end
local refs = loc.ref
if refs then
for i = 1, #refs do
local ref = refs[i]
if ref.type == 'getlocal' then
callback(ref)
elseif ref.type == 'setlocal' then
callback(ref)
end
end
end
end
local function ofGlobal(source, callback)
local key = vm.getKeyName(source)
local node = source.node
if node.tag == '_ENV' then
local uris = files.findGlobals(key)
for _, uri in ipairs(uris) do
local ast = files.getAst(uri)
local globals = vm.getGlobals(ast.ast)
if globals and globals[key] then
for _, info in ipairs(globals[key]) do
callback(info)
end
end
end
else
vm.eachField(node, function (src)
if key == vm.getKeyName(src) then
callback(src)
end
end)
end
end
local function ofTableField(source, callback)
local tbl = source.parent
local src = tbl.parent
if not src then
return
end
local key = vm.getKeyName(source)
vm.eachField(src, function (src)
if key == vm.getKeyName(src) then
callback(src)
end
end)
end
local function ofField(source, callback)
local parent = source.parent
local key = vm.getKeyName(source)
if parent.type == 'tablefield'
or parent.type == 'tableindex' then
ofTableField(parent, callback)
else
local node = parent.node
vm.eachField(node, function (src)
if key == vm.getKeyName(src) then
callback(src)
end
end)
end
end
local function ofLiteral(source, callback)
local parent = source.parent
if not parent then
return
end
if parent.type == 'setindex'
or parent.type == 'getindex'
or parent.type == 'tableindex' then
ofField(source, callback)
end
end
local function ofLabel(source, callback)
callback(source)
if source.ref then
for _, ref in ipairs(source.ref) do
callback(ref)
end
end
end
local function ofGoTo(source, callback)
local name = source[1]
local label = guide.getLabel(source, name)
if label then
ofLabel(label, callback)
end
end
local function findIndex(parent, source)
for i = 1, #parent do
if parent[i] == source then
return i
end
end
return nil
end
local function findCallRecvs(func, index, callback)
vm.eachRef(func, function (source)
local parent = source.parent
if parent.type ~= 'call' then
return
end
if index == 1 then
local slt = parent.parent
if not slt or slt.type ~= 'select' then
return
end
callback(slt.parent)
else
local slt = parent.extParent and parent.extParent[index-1]
if not slt or slt.type ~= 'select' then
return
end
callback(slt.parent)
end
end)
end
local function ofFunction(source, callback)
local parent = source.parent
if not parent then
return
end
if parent.type == 'return' then
local func = guide.getParentFunction(parent)
if not func then
return
end
local index = findIndex(parent, source)
if not index then
return
end
findCallRecvs(func, index, function (src)
vm.eachRef(src, callback)
end)
elseif parent.value == source then
vm.eachRef(parent, callback)
end
end
local function eachRef(source, callback)
local stype = source.type
if stype == 'local' then
ofLocal(source, callback)
elseif stype == 'getlocal'
or stype == 'setlocal' then
ofLocal(source.node, callback)
elseif stype == 'setglobal'
or stype == 'getglobal' then
ofGlobal(source, callback)
elseif stype == 'field'
or stype == 'method' then
ofField(source, callback)
elseif stype == 'setfield'
or stype == 'getfield' then
ofField(source.field, callback)
elseif stype == 'setmethod'
or stype == 'getmethod' then
ofField(source.method, callback)
elseif stype == 'tablefield' then
ofTableField(source, callback)
elseif stype == 'number'
or stype == 'boolean'
or stype == 'string' then
ofLiteral(source, callback)
elseif stype == 'function' then
ofFunction(source, callback)
elseif stype == 'goto' then
ofGoTo(source, callback)
elseif stype == 'label' then
ofLabel(source, callback)
end
end
--- 获取所有的引用
function vm.eachRef(source, callback, max)
local mark = {}
eachRef(source, function (src)
if mark[src] then
return
end
mark[src] = true
callback(src)
end)
end
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