method

find_lineno_offset

v8.1.1 - Show latest stable - Class: ActionView::Template::Handlers::ERB

find_lineno_offset(compiled, source_lines, highlight, error_lineno)

private

Return the offset between the error lineno and the source lineno. Searches in reverse from the backtrace lineno so we have a better chance of finding the correct line

The compiled template is likely to be longer than the source. Use the difference between the compiled and source sizes to determine the earliest line that could contain the highlight.

# File actionview/lib/action_view/template/handlers/erb.rb, line 119
        def find_lineno_offset(compiled, source_lines, highlight, error_lineno)
          first_index = error_lineno - 1 - compiled.size + source_lines.size
          first_index = 0 if first_index < 0

          last_index = error_lineno - 1
          last_index = source_lines.size - 1 if last_index >= source_lines.size

          last_index.downto(first_index) do |line_index|
            next unless source_lines[line_index].include?(highlight)
            return error_lineno - 1 - line_index
          end

          raise LocationParsingError, "Couldn't find code snippet"
        end

find_lineno_offset

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