Improve lua interface

cmd/micro/initlua.go

@@ -62,10 +62,11 @@ func luaImportMicroConfig() *lua.LTable {
 	ulua.L.SetField(pkg, "TryBindKey", luar.New(ulua.L, action.TryBindKey))
 	ulua.L.SetField(pkg, "Reload", luar.New(ulua.L, action.ReloadConfig))
 	ulua.L.SetField(pkg, "AddRuntimeFileFromMemory", luar.New(ulua.L, config.PluginAddRuntimeFileFromMemory))
-	ulua.L.SetField(pkg, "AddRuntimeFilesFromDirectory", luar.New(ulua.L, config.PluginAddRuntimeFileFromMemory))
+	ulua.L.SetField(pkg, "AddRuntimeFilesFromDirectory", luar.New(ulua.L, config.PluginAddRuntimeFilesFromDirectory))
 	ulua.L.SetField(pkg, "AddRuntimeFile", luar.New(ulua.L, config.PluginAddRuntimeFile))
 	ulua.L.SetField(pkg, "ListRuntimeFiles", luar.New(ulua.L, config.PluginListRuntimeFiles))
 	ulua.L.SetField(pkg, "ReadRuntimeFile", luar.New(ulua.L, config.PluginReadRuntimeFile))
+	ulua.L.SetField(pkg, "NewRTFiletype", luar.New(ulua.L, config.NewRTFiletype))
 	ulua.L.SetField(pkg, "RTColorscheme", luar.New(ulua.L, config.RTColorscheme))
 	ulua.L.SetField(pkg, "RTSyntax", luar.New(ulua.L, config.RTSyntax))
 	ulua.L.SetField(pkg, "RTHelp", luar.New(ulua.L, config.RTHelp))
@@ -130,6 +131,9 @@ func luaImportMicroUtil() *lua.LTable {
 	ulua.L.SetField(pkg, "GetLeadingWhitespace", luar.New(ulua.L, util.LuaGetLeadingWhitespace))
 	ulua.L.SetField(pkg, "IsWordChar", luar.New(ulua.L, util.LuaIsWordChar))
 	ulua.L.SetField(pkg, "String", luar.New(ulua.L, util.String))
+	ulua.L.SetField(pkg, "RuneStr", luar.New(ulua.L, func(r rune) string {
+		return string(r)
+	}))
 
 	return pkg
 }

internal/buffer/eventhandler.go

@@ -191,7 +191,7 @@ func (eh *EventHandler) Execute(t *TextEvent) {
 	}
 	eh.UndoStack.Push(t)
 
-	b, err := config.RunPluginFnBool("onBeforeTextEvent", luar.New(ulua.L, t))
+	b, err := config.RunPluginFnBool("onBeforeTextEvent", luar.New(ulua.L, eh.buf), luar.New(ulua.L, t))
 	if err != nil {
 		screen.TermMessage(err)
 	}

internal/config/rtfiles.go

@@ -17,10 +17,13 @@ const (
 	RTHelp         = 2
 	RTPlugin       = 3
 	RTSyntaxHeader = 4
-	NumTypes       = 5 // How many filetypes are there
 )
 
-type RTFiletype byte
+var (
+	NumTypes = 5 // How many filetypes are there
+)
+
+type RTFiletype int
 
 // RuntimeFile allows the program to read runtime data like colorschemes or syntax files
 type RuntimeFile interface {
@@ -31,8 +34,20 @@ type RuntimeFile interface {
 }
 
 // allFiles contains all available files, mapped by filetype
-var allFiles [NumTypes][]RuntimeFile
+var allFiles [][]RuntimeFile
-var realFiles [NumTypes][]RuntimeFile
+var realFiles [][]RuntimeFile
+
+func init() {
+	allFiles = make([][]RuntimeFile, NumTypes)
+	realFiles = make([][]RuntimeFile, NumTypes)
+}
+
+func NewRTFiletype() int {
+	NumTypes++
+	allFiles = append(allFiles, []RuntimeFile{})
+	realFiles = append(realFiles, []RuntimeFile{})
+	return NumTypes - 1
+}
 
 // some file on filesystem
 type realFile string