Class: Conductor::Filter

Inherits:

String

• Object
• String
• Conductor::Filter

Defined in:

lib/conductor/filter.rb

Overview

String filtering

Instance Attribute Summary

• #filter ⇒ Object readonly

  Returns the value of attribute filter.

• #params ⇒ Object readonly

  Returns the value of attribute params.

Instance Method Summary

• #initialize(filter) ⇒ Filter constructor

  Instantiate a filter.

• #process ⇒ String

  Process STDIN with @filter.

Methods inherited from String

#add_comment, #add_mmd, #add_yaml, #append, #append!, #autolink, #bool?, #bool_to_symbol, #clean_encode, #clean_encode!, #comment?, #count_h1s, #date?, #decrease_headers, #delete_meta, #delete_mmd, #delete_yaml, #ensure_h1, #ensure_h1!, #ensure_mmd_meta_newline, #find_file_in, #first_h1, #first_h2, #fix_headers, #fix_headers!, #fix_hierarchy, #increase_headers, #increase_headers!, #inject_after_meta, #insert_css, #insert_file, #insert_javascript, #insert_raw_javascript, #insert_script, #insert_stylesheet, #insert_title, #insert_toc, #meta?, #meta_insert_point, #meta_type, #normalize_filter, #normalize_headers, #normalize_headers!, #normalize_include_type, #normalize_position, #number?, #pandoc?, #read_title, #replace_all, #replace_one, #set_meta, #split_list, #strip_meta, #strip_time, #time?, #title_from_slug, #titleize, #to_bool, #to_date, #to_day, #to_pattern, #to_rx, #utf8, #utf8!, #wrap_style, #yaml?

Constructor Details

#initialize(filter) ⇒ Filter

Instantiate a filter

Parameters:

• filter (Filter) —

  The filter

# File 'lib/conductor/filter.rb', line 672

def initialize(filter)
  @filter, @params = filter.normalize_filter
  super
end

Instance Attribute Details

#filter ⇒ Object (readonly)

Returns the value of attribute filter.

# File 'lib/conductor/filter.rb', line 665

def filter
  @filter
end

#params ⇒ Object (readonly)

Returns the value of attribute params.

# File 'lib/conductor/filter.rb', line 665

def params
  @params
end

Instance Method Details

#process ⇒ String

Process STDIN with @filter

Returns:

• (String) —

  processed text

# File 'lib/conductor/filter.rb', line 682

def process
  content = Conductor.stdin

  case @filter
  when /(insert|add|inject)stylesheet/
    @params.each do |sheet|
      content = content.insert_stylesheet(sheet)
    end
    content
  when /(insert|add|inject)(css|style)/
    @params.each do |css|
      content = content.insert_css(css)
    end
    content
  when /(insert|add|inject)title/
    amt = 0
    if @params
      amt = if @params[0] =~ /^[yts]/
              1
            else
              @params[0].to_i
            end
    end
    content.insert_title(shift: amt)
  when /(insert|add|inject)script/
    content.append!("\n\n<div>")
    @params.each do |script|
      content = content.insert_script(script)
    end
    "#{content}</div>"
  when /(prepend|append|insert|inject)(raw|file|code)/
    m = Regexp.last_match

    position = if @params.count == 2
                 @params[1].normalize_position
               else
                 m[1].normalize_position
               end
    content.insert_file(@params[0], m[2].normalize_include_type, position)
  when /inserttoc/
    max = @params.nil? || @params.empty? ? nil : @params[0]

    after = if @params && @params.count == 2
              @params[1] =~ /2/ ? :h2 : :h1
            else
              :start
            end

    content.insert_toc(max, after)
  when /(add|set)meta/
    unless @params.count == 2
      warn "Invalid filter parameters: #{@filter}(#{@params.join(",")})"
      return content
    end

    # needs to test for existing meta, setting key if exists, adding if not
    # should recognize yaml and mmd
    content.set_meta(@params[0], @params[1], style: content.meta_type)
  when /(strip|remove|delete)meta/
    if @params&.count&.positive?
      content.delete_meta(@params[0])
    else
      content.strip_meta
    end
  when /setstyle/
    # Should check for existing style first
    content.set_meta("marked style", @params[0], style: :comment)
  when /replaceall/
    unless @params.count == 2
      warn "Invalid filter parameters: #{@filter}(#{@params.join(",")})"
      return content
    end

    content.replace_all(@params[0], @params[1])
  when /replace$/
    unless @params.count == 2
      warn "Invalid filter parameters: #{@filter}(#{@params.join(",")})"
      return content
    end

    content.replace_one(@params[0], @params[1])
  when /(auto|self)link/
    content.autolink
  when /fix(head(lines|ers)|hierarchy)/
    content.fix_hierarchy
  when /(increase|decrease)headers/
    count = @params ? @params[0].to_i : 1
    @filter =~ /^inc/ ? content.increase_headers(count) : content.decrease_headers(count)
  else
    content
  end
end