Added Lines:UCL for processing UCL commands

textfilters.go

@@ -215,6 +215,48 @@ var TextFilters = map[string]TextProcessor{
 		},
 	},
 
+	"ucl-each-line": {
+		Label:       "Lines: UCL…",
+		Description: "Transform each line as the result of a UCL expression.",
+		FilterWithArg: &FilterWithArg{
+			Label: "UCL Expression",
+			OnConfirm: func(ctx context.Context, prompt string) (filter TextFilter, err error) {
+				spv := strPseudoVar{}
+
+				uclCtx := uclInstFromContext(ctx)
+				uclCtx.SetPseudoVar(".", &spv)
+
+				return func(ctx context.Context, input string) (resp TextFilterResponse, err error) {
+					var (
+						dst bytes.Buffer
+					)
+					scnr := bufio.NewScanner(strings.NewReader(input))
+					isFirst := true
+					for scnr.Scan() {
+						if isFirst {
+							isFirst = false
+						} else {
+							dst.WriteString("\n")
+						}
+
+						line := scnr.Text()
+						spv.str = line
+
+						if res, err := uclCtx.EvalString(ctx, prompt); err == nil {
+							dst.WriteString(fmt.Sprint(res))
+						} else if errors.Is(err, ucl.ErrNotConvertable) {
+							dst.WriteString(line)
+						} else {
+							return TextFilterResponse{}, err
+						}
+					}
+
+					return TextFilterResponse{Output: dst.String()}, nil
+				}, nil
+			},
+		},
+	},
+
 	"ucl-evaluate": {
 		Label:       "UCL: Evaluate",
 		Description: "Evaluates the input as a UCL expression and displays the result in the status bar.",
@@ -247,3 +289,11 @@ var TextFilters = map[string]TextProcessor{
 		},
 	},
 }
+
+type strPseudoVar struct {
+	str string
+}
+
+func (s strPseudoVar) Get(ctx context.Context) (any, error) {
+	return s.str, nil
+}