Module: Net::Text::Reflow

Defined in:
lib/net/text/reflow.rb

Overview

Contains helper methods to correctly display texts with long lines.

This module expect given text to be Gemtext inspired (i.e. links prefixed with => and “‘ delimitting code blocks).

Class Method Summary collapse

Class Method Details

.format_body(body, length) ⇒ Object 



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# File 'lib/net/text/reflow.rb', line 50

def self.format_body(body, length)
  new_body = []
  mono_block_open = false
  body.each_line do |line|
    mono_block_open, content = parse_line line, mono_block_open, length
    new_body += content
  end
  new_body.join("\n")
end

.parse_line(line, mono_block_open, length) ⇒ Object 



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# File 'lib/net/text/reflow.rb', line 34

def self.parse_line(line, mono_block_open, length)
  if line.start_with?('```')
    mono_block_open = !mono_block_open
    return [mono_block_open, [line.chomp]]
  end

  return [mono_block_open, [line.chomp]] if mono_block_open

  line.strip!
  if line.start_with?('=>') || line.length < length
    return [mono_block_open, [line]]
  end

  [mono_block_open, reflow_line(line, length)]
end

.reflow_line(line, length) ⇒ Object 



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# File 'lib/net/text/reflow.rb', line 19

def self.reflow_line(line, length)
  output = []
  prefix = reflow_line_prefix(line)
  limit_chars = ['-', '­', ' '].freeze
  while line.length > length
    # Detect first possible cut
    cut_index = limit_chars.map { line[0...length].rindex(_1) || -1 }.max
    break if cut_index.zero? # Better do nothing for now

    output << line[0...cut_index]
    line = prefix + line[(cut_index + 1)..]
  end
  output << line
end

.reflow_line_prefix(line) ⇒ Object 



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# File 'lib/net/text/reflow.rb', line 10

def self.reflow_line_prefix(line)
  m = line.match(/\A([*#>]+ )/)
  return '' unless m
  # Each quote line should begin with the quote mark
  return m[1] if m[1].start_with?('>')

  ' ' * m[1].length
end