some refactoring, fix stringer func

pkg/printer/cast.go

@@ -1,3 +1,5 @@
+package printer
+
 /*
 Copyright © 2026 Thomas von Dein
 
@@ -14,7 +16,6 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
-package printer
 
 import (
 	"fmt"
@@ -25,7 +26,9 @@ import (
 	"github.com/elastic/go-elasticsearch/v9/typedapi/types"
 )
 
-func any2string(in any) string {
+// stringer returns  the string  representation of different  types of
+// values
+func stringer(in any) string {
 	//nolint:gocritic
 	switch val := in.(type) {
 	case string:
@@ -54,52 +57,26 @@ func any2string(in any) string {
 		return string(val)
 	case nil:
 		return "null"
-	case types.Percentage, types.DateTime:
+	case *types.Float64:
-		return val.(string)
+		// ignore err here, because types.Float64.MarshalJSON() never returns one
-	}
+		f, _ := val.MarshalJSON()
-
+		return string(f)
-	return ""
+	default:
-}
+		// Caution: this may cause a  panic if the [unknown] type does
-
+		// not implement  fmt.Stringer. In this case  add another case
-func (data *Table) preprocessRows() {
+		// to the type switch for it above.
-	if data.processed {
+		return in.(fmt.Stringer).String()
-		// only do it once
-		return
-	}
-
-	// convert entries to strings
-	data.rows = make([][]string, len(data.Entries))
-	for rowidx, entries := range data.Entries {
-		data.rows[rowidx] = make([]string, len(entries))
-
-		for colidx, entry := range data.Entries[rowidx] {
-			data.rows[rowidx][colidx] = any2string(entry)
 	}
 }
 
-	// determine header lenght's
+// visibleLen returns the  length of a string but  only visible chars,
-	for idx, head := range data.Headers {
+// w/o ansi color escapes
-		data.lenHeaders[idx] = visibleLen(head)
+func visibleLen(word string) int {
+	if !strings.Contains(word, "\x1b") {
+		// no ansi escape in there, use faster method
+		return len(word)
 	}
 
-	// determine max width per column
+	// contains escapes, need to clean up before counting
-	for _, entries := range data.rows {
+	return len(ansiCtrlSeq.ReplaceAllLiteralString(word, ""))
-		currentWidth := 0
-
-		for idx, entry := range entries {
-			length := visibleLen(entry)
-
-			if data.lenHeaders[idx] < length {
-				if length > currentWidth+data.maxwidth {
-					data.lenHeaders[idx] = data.maxwidth - currentWidth
-				} else {
-					data.lenHeaders[idx] = length
-				}
-			}
-
-			currentWidth += data.lenHeaders[idx]
-		}
-	}
-
-	data.processed = true
 }

pkg/printer/table.go

@@ -291,7 +291,7 @@ func (table *Table) AddRowLate(fields ...any) {
 	row := make([]string, len(fields))
 
 	for idx, field := range fields {
-		row[idx] = any2string(field)
+		row[idx] = stringer(field)
 	}
 
 	table.rows = append(table.rows, row)
@@ -311,9 +311,47 @@ func (table *Table) toMap() []map[string]any {
 	return raw
 }
 
-// return the length of a string but only visible chars, w/o ansi color escapes
+func (data *Table) preprocessRows() {
-func visibleLen(word string) int {
+	if data.processed {
-	return len(ansiCtrlSeq.ReplaceAllLiteralString(word, ""))
+		// only do it once
+		return
+	}
+
+	// convert entries to strings
+	data.rows = make([][]string, len(data.Entries))
+	for rowidx, entries := range data.Entries {
+		data.rows[rowidx] = make([]string, len(entries))
+
+		for colidx, entry := range data.Entries[rowidx] {
+			data.rows[rowidx][colidx] = stringer(entry)
+		}
+	}
+
+	// determine header lenght's
+	for idx, head := range data.Headers {
+		data.lenHeaders[idx] = visibleLen(head)
+	}
+
+	// determine max width per column
+	for _, entries := range data.rows {
+		currentWidth := 0
+
+		for idx, entry := range entries {
+			length := visibleLen(entry)
+
+			if data.lenHeaders[idx] < length {
+				if length > currentWidth+data.maxwidth {
+					data.lenHeaders[idx] = data.maxwidth - currentWidth
+				} else {
+					data.lenHeaders[idx] = length
+				}
+			}
+
+			currentWidth += data.lenHeaders[idx]
+		}
+	}
+
+	data.processed = true
 }
 
 func isInt(num string) bool {