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Edit File:
display_code_with_line_numbers.rb
# frozen_string_literal: true module SyntaxSuggest # Outputs code with highlighted lines # # Whatever is passed to this class will be rendered # even if it is "marked invisible" any filtering of # output should be done before calling this class. # # DisplayCodeWithLineNumbers.new( # lines: lines, # highlight_lines: [lines[2], lines[3]] # ).call # # => # 1 # 2 def cat # > 3 Dir.chdir # > 4 end # 5 end # 6 class DisplayCodeWithLineNumbers TERMINAL_HIGHLIGHT = "\e[1;3m" # Bold, italics TERMINAL_END = "\e[0m" def initialize(lines:, highlight_lines: [], terminal: false) @lines = Array(lines).sort @terminal = terminal @highlight_line_hash = Array(highlight_lines).each_with_object({}) { |line, h| h[line] = true } @digit_count = @lines.last&.line_number.to_s.length end def call @lines.map do |line| format_line(line) end.join end private def format_line(code_line) # Handle trailing slash lines code_line.original.lines.map.with_index do |contents, i| format( empty: code_line.empty?, number: (code_line.number + i).to_s, contents: contents, highlight: @highlight_line_hash[code_line] ) end.join end private def format(contents:, number:, empty:, highlight: false) string = +"" string << if highlight "> " else " " end string << number.rjust(@digit_count).to_s if empty string << contents else string << " " string << TERMINAL_HIGHLIGHT if @terminal && highlight string << contents string << TERMINAL_END if @terminal end string end end end
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