Method GetWordAtPosition

pkg/lsp/documents.go:355–386

GetWordAtPosition returns the word at the given position. This method extracts the identifier or keyword at a specific cursor position, which is used for hover documentation and completion filtering. The method uses rune-based indexing to properly handle UTF-8 encoded SQL identifiers that may cont

(pos Position)

// This method is safe for concurrent use as it operates on document fields
// without modifying state.
func (doc *Document) GetWordAtPosition(pos Position) string {
	if pos.Line >= len(doc.Lines) {
		return ""
	}

	line := doc.Lines[pos.Line]
	runes := []rune(line)

	if pos.Character >= len(runes) {
		return ""
	}

	// Find word boundaries using rune indexing for UTF-8 safety
	start := pos.Character
	end := pos.Character

	// Move start backwards to find word start
	for start > 0 && isWordChar(runes[start-1]) {
		start--
	}

	// Move end forwards to find word end
	for end < len(runes) && isWordChar(runes[end]) {
		end++
	}

	if start == end {
		return ""
	}

	return string(runes[start:end])
}

// isWordChar returns true if c is a valid word character
func isWordChar(c rune) bool {