简单接入 hover 协议

server-beta/src/core/hover/init.lua

@@ -17,6 +17,7 @@ local function getHoverAsFunction(source)
     local label = table.concat(labels, '\n')
     return {
         label  = label,
+        source = source,
     }
 end
 

server-beta/src/provider/init.lua

@@ -8,6 +8,7 @@ local define    = require 'proto.define'
 local workspace = require 'workspace'
 local config    = require 'config'
 local library   = require 'library'
+local markdown  = require 'provider.markdown'
 
 local function updateConfig()
     local configs = proto.awaitRequest('workspace/configuration', {
@@ -143,12 +144,28 @@ proto.on('textDocument/didChange', function (params)
     end
 end)
 
-proto.on('textDocument/hover', function ()
+proto.on('textDocument/hover', function (params)
+    local core = require 'core.hover'
+    local doc    = params.textDocument
+    local uri    = doc.uri
+    if not files.exists(uri) then
+        return nil
+    end
+    local lines  = files.getLines(uri)
+    local text   = files.getText(uri)
+    local offset = define.offset(lines, text, params.position)
+    local hover = core(uri, offset)
+    if not hover then
+        return nil
+    end
+    local md = markdown()
+    md:add('lua', hover.label)
     return {
         contents = {
-            value = 'Hello loli!',
+            value = md:string(),
             kind  = 'markdown',
-        }
+        },
+        range = define.range(lines, text, hover.source.start, hover.source.finish),
     }
 end)
 

server-beta/src/provider/markdown.lua

+local mt = {}
+mt.__index = mt
+mt.__name = 'markdown'
+
+function mt:add(language, text)
+    if not text then
+        return
+    end
+    if language == 'lua' then
+        self[#self+1] = ('```lua\n%s\n```'):format(text)
+    else
+        self[#self+1] = text:gsub('\n', '\n\n')
+    end
+end
+
+function mt:string()
+    return table.concat(self, '\n')
+end
+
+return function ()
+    return setmetatable({}, mt)
+end

server-beta/src/vm/getValue.lua

@@ -768,7 +768,10 @@ end
 function vm.isSameValue(a, b)
     local valuesA = vm.getValue(a)
     local valuesB = vm.getValue(b)
-    if valuesA == valuesB and valuesA ~= nil then
+    if not valuesA or not valuesB then
+        return false
+    end
+    if valuesA == valuesB then
         return true
     end
     local values = {}