feat: implement syntax highlight and hints

api.go

@@ -35,8 +35,10 @@ var exports = map[string]util.LuaExport{
 	"runnerMode": util.LuaExport{hlrunnerMode, 1, false},
 /*
 	"goro": hlgoro,
-	"highlighter": hlhighlighter,
-	"hinter": hlhinter,
+*/
+	"highlighter": util.LuaExport{hlhighlighter, 1, false},
+	"hinter": util.LuaExport{hlhinter, 1, false},
+/*
 	"multiprompt": hlmlprompt,
 	"prependPath": hlprependPath,
 */
@@ -574,19 +576,23 @@ func hlrunnerMode(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
 	return c.Next(), nil
 }
 
-/*
-
 // hinter(cb)
 // Sets the hinter function. This will be called on every key insert to determine
 // what text to use as an inline hint. The callback is passed 2 arguments:
 // the current line and the position. It is expected to return a string
 // which will be used for the hint.
 // --- @param cb function
-func hlhinter(L *lua.LState) int {
-	hinterCb := L.CheckFunction(1)
+func hlhinter(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
+	if err := c.Check1Arg(); err != nil {
+		return nil, err
+	}
+	hinterCb, err := c.ClosureArg(0)
+	if err != nil {
+		return nil, err
+	}
 	hinter = hinterCb
 	
-	return 0
+	return c.Next(), err
 }
 
 // highlighter(cb)
@@ -595,10 +601,15 @@ func hlhinter(L *lua.LState) int {
 // is passed the current line as typed and is expected to return a line that will
 // be used to display in the line.
 // --- @param cb function
-func hlhighlighter(L *lua.LState) int {
-	highlighterCb := L.CheckFunction(1)
+func hlhighlighter(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
+	if err := c.Check1Arg(); err != nil {
+		return nil, err
+	}
+	highlighterCb, err := c.ClosureArg(0)
+	if err != nil {
+		return nil, err
+	}
 	highlighter = highlighterCb
 
-	return 0
+	return c.Next(), err
 }
-*/

rl.go

@@ -13,10 +13,8 @@ type lineReader struct {
 	rl *readline.Instance
 }
 var fileHist *fileHistory
-/*
-var hinter lua.LValue = lua.LNil
-var highlighter lua.LValue = lua.LNil
-*/
+var hinter *rt.Closure
+var highlighter *rt.Closure
 
 func newLineReader(prompt string, noHist bool) *lineReader {
 	rl := readline.NewInstance()
@@ -47,53 +45,43 @@ func newLineReader(prompt string, noHist bool) *lineReader {
 		}
 		hooks.Em.Emit("hilbish.vimAction", actionStr, args)
 	}
-	/*
 	rl.HintText = func(line []rune, pos int) []rune {
-		if hinter == lua.LNil {
+		if hinter == nil {
 			return []rune{}
 		}
 
-		err := l.CallByParam(lua.P{
-			Fn: hinter,
-			NRet: 1,
-			Protect: true,
-		}, lua.LString(string(line)), lua.LNumber(pos))
+		retVal, err := rt.Call1(l.MainThread(), rt.FunctionValue(highlighter),
+		rt.StringValue(string(line)), rt.IntValue(int64(pos)))
 		if err != nil {
 			fmt.Println(err)
 			return []rune{}
 		}
 		
-		retVal := l.Get(-1)
 		hintText := ""
-		if luaStr, ok := retVal.(lua.LString); retVal != lua.LNil && ok {
-			hintText = luaStr.String()
+		if luaStr, ok := retVal.TryString(); ok {
+			hintText = luaStr
 		}
 		
 		return []rune(hintText)
 	}
 	rl.SyntaxHighlighter = func(line []rune) string {
-		if highlighter == lua.LNil {
+		if highlighter == nil {
 			return string(line)
 		}
-		err := l.CallByParam(lua.P{
-			Fn: highlighter,
-			NRet: 1,
-			Protect: true,
-		}, lua.LString(string(line)))
+		retVal, err := rt.Call1(l.MainThread(), rt.FunctionValue(highlighter),
+		rt.StringValue(string(line)))
 		if err != nil {
 			fmt.Println(err)
 			return string(line)
 		}
 		
-		retVal := l.Get(-1)
 		highlighted := ""
-		if luaStr, ok := retVal.(lua.LString); retVal != lua.LNil && ok {
-			highlighted = luaStr.String()
+		if luaStr, ok := retVal.TryString(); ok {
+			highlighted = luaStr
 		}
 		
 		return highlighted
 	}
-	*/
 	rl.TabCompleter = func(line []rune, pos int, _ readline.DelayedTabContext) (string, []*readline.CompletionGroup) {
 		ctx := string(line)
 		var completions []string