Class: String

Inherits:
Object
  • Object
show all
Includes:
CLIMarkdown::Colors
Defined in:
lib/mdless/string.rb,
lib/mdless/colors.rb

Overview

String helpers

Constant Summary

Constants included from CLIMarkdown::Colors

CLIMarkdown::Colors::COLORS, CLIMarkdown::Colors::ESCAPE_REGEX

Instance Method Summary collapse

Methods included from CLIMarkdown::Colors

#blackout, #c, #last_color_code, #remove_pre_post, #size_clean, #uncolor, #uncolor!, #unpad, #wrap

Instance Method Details

#clean_empty_lines ⇒ Object 



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# File 'lib/mdless/string.rb', line 7

def clean_empty_lines
  gsub(/^[ \t]+$/, '')
end

#clean_empty_lines! ⇒ Object 



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# File 'lib/mdless/string.rb', line 11

def clean_empty_lines!
  replace clean_empty_lines
end

#clean_header_ids ⇒ Object 



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# File 'lib/mdless/string.rb', line 51

def clean_header_ids
  gsub(/ +\[.*?\] *$/, '').gsub(/ *\{#.*?\} *$/, '').strip
end

#clean_header_ids! ⇒ Object 



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# File 'lib/mdless/string.rb', line 47

def clean_header_ids!
  replace clean_header_ids
end

#color(key) ⇒ Object 



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# File 'lib/mdless/string.rb', line 15

def color(key)
  val = nil
  keys = key.split(/[ ,>]/)
  if MDLess.theme.key?(keys[0])
    val = MDLess.theme[keys.shift]
  else
    MDLess.log.error("Invalid theme key!: #{key}") unless keys[0] =~ /^text/
    return c([:reset])
  end
  keys.each do |k|
    if val.key?(k)
      val = val[k]
    else
      MDLess.log.error("Invalid theme key@: #{k}")
      return c([:reset])
    end
  end
  if val.is_a? String
    val = "x #{val}"
    res = val.split(/ /).map(&:to_sym)
    c(res)
  else
    c([:reset])
  end
end

#color_meta(cols) ⇒ Object 



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# File 'lib/mdless/string.rb', line 55

def color_meta(cols)
  @cols = cols
  input = dup
  input.clean_empty_lines!
  MDLess.meta = {}

  in_yaml = false
  first_line = input.split("\n").first
  if first_line =~ /(?i-m)^---[ \t]*?$/
    MDLess.log.info('Found YAML')
    # YAML
    in_yaml = true
    input.sub!(/(?i-m)^---[ \t]*\n(?<content>[\s\S]*?)\n[-.]{3}[ \t]*\n/m) do
      m = Regexp.last_match
      MDLess.log.info('Processing YAML Header')
      YAML.unsafe_load(m['content']).map { |k, v| MDLess.meta[k.downcase] = v }
      lines = m['content'].split(/\n/)
      longest = lines.inject { |memo, word| memo.length > word.length ? memo : word }.length
      longest = longest < @cols ? longest + 1 : @cols
      lines.map do |line|
        if line =~ /^[-.]{3}\s*$/
          line = "#{color('metadata marker')}#{'%' * longest}"
        else
          line.sub!(/^(.*?:)[ \t]+(\S)/, '\1 \2')
          line = "#{color('metadata marker')}%#{color('metadata color')}#{line}#{xc}"
        end

        line += "\u00A0" * (longest - line.uncolor.strip.length) if (longest - line.uncolor.strip.length).positive?
        line + xc
      end.join("\n") + "#{xc}\n"
    end
  end

  if !in_yaml && first_line =~ /(?i-m)^[\w ]+:\s+\S+/
    MDLess.log.info('Found MMD Headers')
    input.sub!(/(?i-m)^([\S ]+:[\s\S]*?)+(?=\n *\n)/) do |mmd|
      lines = mmd.split(/\n/)
      return mmd if lines.count > 20

      longest = lines.inject { |memo, word| memo.length > word.length ? memo : word }.length
      longest = longest < @cols ? longest + 1 : @cols
      lines.map do |line|
        line.sub!(/^(.*?:)[ \t]+(\S)/, '\1 \2')
        parts = line.match(/[ \t]*(.*?): +(.*?)$/)
        key = parts[1].gsub(/[^a-z0-9\-_]/i, '')
        value = parts[2].strip
        MDLess.meta[key] = value
        line = "#{color('metadata color')}#{line}#{xc}"
        line += "\u00A0" * (longest - line.uncolor.strip.length) if (longest - line.uncolor.strip.length).positive?
        line + xc
      end.join("\n") + "#{"\u00A0" * longest}#{xc}\n"
    end
  end

  input
end

#highlight_tags ⇒ Object 



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# File 'lib/mdless/string.rb', line 112

def highlight_tags
  log = MDLess.log
  tag_color = color('at_tags tag')
  value_color = color('at_tags value')
  gsub(/(?<pre>\s|m)(?<tag>@[^ \]:;.?!,("'\n]+)(?:(?<lparen>\()(?<value>.*?)(?<rparen>\)))?(?=[ ;!,.?]|$)/) do
    m = Regexp.last_match
    last_color = m.pre_match.last_color_code
    [
      m['pre'],
      tag_color,
      m['tag'],
      m['lparen'],
      value_color,
      m['value'],
      tag_color,
      m['rparen'],
      xc,
      last_color
    ].join
  end
end

#remove_meta ⇒ Object 



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# File 'lib/mdless/string.rb', line 148

def remove_meta
  first_line = split("\n").first
  if first_line =~ /(?i-m)^---[ \t]*?$/
    sub(/(?im)^---[ \t]*\n([\s\S\n]*?)\n[-.]{3}[ \t]*\n/, '')
  elsif first_line =~ /(?i-m)^[\w ]+:\s+\S+/
    sub(/(?im)^([\S ]+:[\s\S]*?)+(?=\n *\n)/, '')
  else
    self
  end
end

#scrub ⇒ Object 



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# File 'lib/mdless/string.rb', line 134

def scrub
  encode('utf-16', invalid: :replace).encode('utf-8')
end

#scrub! ⇒ Object 



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# File 'lib/mdless/string.rb', line 138

def scrub!
  replace scrub
end

#to_rx(distance: 2, string_start: false) ⇒ Object 



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# File 'lib/mdless/string.rb', line 41

def to_rx(distance: 2, string_start: false)
  chars = downcase.split(//)
  pre = string_start ? '^' : '^.*?'
  /#{pre}#{chars.join(".{,#{distance}}")}.*?$/
end

#valid_lexer? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mdless/string.rb', line 159

def valid_lexer?
  return false unless TTY::Which.exist?('pygmentize')

  MDLess.pygments_lexers.include?(downcase)
end

#valid_pygments_theme? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mdless/string.rb', line 142

def valid_pygments_theme?
  return false unless TTY::Which.exist?('pygmentize')

  MDLess.pygments_styles.include?(self)
end