bug fix #19 documentation for completion items.

Author: tangzx

EmmyLua-Common/src/main/ext/com/tang/intellij/lua/editor/completion/LookupElementFactory.kt

@@ -10,6 +10,7 @@ import com.tang.intellij.lua.psi.LuaPsiElement
 import com.tang.intellij.lua.ty.IFunSignature
 import com.tang.intellij.lua.ty.ITy
 import com.tang.intellij.lua.ty.ITyFunction
+import com.tang.lsp.ILuaFile
 import org.eclipse.lsp4j.CompletionItemKind
 import javax.swing.Icon
 
@@ -40,10 +41,11 @@ object LookupElementFactory {
                                   isColonStyle: Boolean,
                                   fnTy: ITyFunction,
                                   icon: Icon?): LuaLookupElement {
+        val file = classMember.containingFile.virtualFile as ILuaFile
         val item = buildSignatureCompletionItem(lookupString, signature)
         item.kind = CompletionItemKind.Method
         item.itemText = "[$clazzName]"
-        item.data = "$clazzName|${classMember.name}"
+        item.data = "${file.uri}|${classMember.textOffset}"
         return item
     }
 
@@ -52,8 +54,9 @@ object LookupElementFactory {
                                  field: LuaClassField,
                                  ty: ITy?,
                                  bold: Boolean): LuaLookupElement {
+        val file = field.containingFile.virtualFile as ILuaFile
         val element = LuaLookupElement(name)
-        element.data = "$clazzName|$name"
+        element.data = "${file.uri}|${field.textOffset}"
         element.kind = CompletionItemKind.Field
         return element
     }

EmmyLua-Common/src/main/ext/com/tang/lsp/workspace.kt

@@ -11,6 +11,7 @@ import java.net.URI
 interface IWorkspace {
     fun addFile(file: File, text: String? = null): ILuaFile?
     fun findFile(uri: String): IVirtualFile?
+    fun findLuaFile(uri: String): ILuaFile?
     fun removeFile(uri: String)
     fun eachRoot(processor: (f: IFolder) -> Boolean)
     companion object {

EmmyLua-LS/src/main/kotlin/com/tang/vscode/LuaTextDocumentService.kt

@@ -18,7 +18,6 @@ import com.tang.intellij.lua.editor.completion.asCompletionItem
 import com.tang.intellij.lua.psi.*
 import com.tang.intellij.lua.reference.ReferencesSearch
 import com.tang.intellij.lua.search.SearchContext
-import com.tang.intellij.lua.stubs.index.LuaClassMemberIndex
 import com.tang.intellij.lua.ty.ITyFunction
 import com.tang.intellij.lua.ty.findPerfectSignature
 import com.tang.intellij.lua.ty.process
@@ -151,16 +150,18 @@ class LuaTextDocumentService(private val workspace: LuaWorkspaceService) : TextD
             if (data is JsonPrimitive) {
                 val arr = data.asString.split("|")
                 if (arr.size >= 2) {
-                    val cls = arr[0]
-                    val name = arr[1]
-                    LuaClassMemberIndex.process(cls, name, SearchContext.get(workspace.project), Processor { member ->
-                        val doc = documentProvider.generateDoc(member, member)
-                        val content = MarkupContent()
-                        content.kind = "markdown"
-                        content.value = doc
-                        item.documentation = Either.forRight(content)
-                        false
-                    })
+                    workspace.findLuaFile(arr[0])?.let { file->
+                        val position = arr[1].toInt()
+                        file.psi?.findElementAt(position)?.let { psi ->
+                            PsiTreeUtil.getParentOfType(psi, LuaClassMember::class.java)?.let { member ->
+                                val doc = documentProvider.generateDoc(member, member)
+                                val content = MarkupContent()
+                                content.kind = "markdown"
+                                content.value = doc
+                                item.documentation = Either.forRight(content)
+                            }
+                        }
+                    }
                 }
             }
             item

EmmyLua-LS/src/main/kotlin/com/tang/vscode/LuaWorkspaceService.kt

@@ -263,6 +263,10 @@ class LuaWorkspaceService : WorkspaceService, IWorkspace {
         return findFile(fileURI)
     }
 
+    override fun findLuaFile(uri: String): ILuaFile? {
+        return findFile(uri) as? ILuaFile
+    }
+
     private fun findFile(fileURI: FileURI): IVirtualFile? {
         val parent = fileURI.parent
         val folder: IFolder? = if (parent == null)