yorukot/superfile · error

failure in extracted content : %w

Error message

failure in extracted content : %w

What it means

After extracting the component region, validateComponentPlacement joins the extracted lines and runs validateRender to confirm the extracted block fits the expected row/column count (and border rules). This error wraps a validateRender failure, meaning the extracted content itself fails dimensional validation — the rendered component occupies a different footprint than declared.

Source

Thrown at src/internal/validation.go:393

		// TODO: Add validations for overlay models
	}

	return nil
}

// Inclusive
func (m *model) validateComponentPlacement(lines []string, pos compPosition, border bool) error {
	extractedLines, err := m.extractComponent(lines, pos)
	if err != nil {
		return fmt.Errorf("failure while extracting content : %w", err)
	}

	cntRow := pos.endRow - pos.stRow + 1
	cntCol := pos.endCol - pos.stCol + 1
	extractedOut := strings.Join(extractedLines, "\n")
	if err := validateRender(extractedOut, cntRow, cntCol, border); err != nil {
		return fmt.Errorf("failure in extracted content : %w", err)
	}
	return nil
}

// Inclusive
func (m *model) extractComponent(lines []string, pos compPosition) ([]string, error) {
	if 0 > pos.stRow || pos.stRow > pos.endRow || pos.endRow >= len(lines) {
		return nil, fmt.Errorf("invalid row range [%v, %v], line count : %v",
			pos.stRow, pos.endRow, len(lines))
	}
	firstLineWidth := ansi.StringWidth(lines[0])
	if 0 > pos.stCol || pos.stCol > pos.endCol || pos.endCol >= firstLineWidth {
		return nil, fmt.Errorf("invalid col range [%v, %v], first line width : %v",
			pos.stCol, pos.endCol, firstLineWidth)
	}

	cntRow := pos.endRow - pos.stRow + 1
	extractedLines := make([]string, cntRow)

View on GitHub (pinned to b72f550bc6)

Solutions

1. Compare extracted line count/width against cntRow/cntCol in a debug run to see the mismatch
2. Ensure the component is rendered with the exact same width/height the position was computed for (account for borders)
3. Use ansi-aware width measurement (ansi.StringWidth) rather than len() when computing positions
4. Re-render after terminal resize so positions match the current content

Example fix

// before
if err := validateRender(extractedOut, cntRow, cntCol, border); err != nil {
	return fmt.Errorf("failure in extracted content : %w", err)
}
// after
cntCol += extraBorderWidth // account for border drawn by component
if err := validateRender(extractedOut, cntRow, cntCol, border); err != nil {
	return fmt.Errorf("failure in extracted content : %w", err)
}

extracted := strings.Join(extractedLines, "\n")
linesOK := len(extractedLines) == cntRow
widthsOK := true
for _, l := range extractedLines { if ansi.StringWidth(l) > cntCol { widthsOK = false } }

if err := validateRender(extractedOut, cntRow, cntCol, border); err != nil {
	log.Printf("extracted block %dx%d invalid: %v", cntRow, cntCol, err)
	return err
}

When it happens

Trigger: extractedOut has more lines than cntRow, wider content than cntCol, or otherwise violates validateRender's rules (e.g., lines wrapping beyond the allotted width).

Common situations: A component's ANSI-styled output wraps to extra lines because its computed width is off by the border width; multi-byte/emoji characters inflate visual width; terminal resize invalidates cached layout metrics.

Related errors

• failure while extracting content : %w
• invalid col range [%v, %v], first line width : %v
• source path does not exist: %s
• invalid row range [%v, %v], line count : %v
• invalid background color: %w

AI-assisted analysis of yorukot/superfile@b72f550bc6 (2026-09-01). Data as JSON: /api/errors/0ac1aea4b6d7450a. Report an issue: GitHub.