Class: Rundoc::FencedCodeBlock

Inherits:
Object
  • Object
show all
Defined in:
lib/rundoc/fenced_code_block.rb

Overview

A code secttion respesents a block of fenced code

A document can have multiple code sections

Constant Summary collapse

AUTOGEN_WARNING = 
"\n<!-- STOP. This document is autogenerated. Do not manually modify. See the top of the doc for more details. -->"
PARTIAL_RESULT = 
[]
PARTIAL_ENV = 
{}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(fence:, lang:, code:, context:) ⇒ FencedCodeBlock

Returns a new instance of FencedCodeBlock.

Parameters:

  • fence (String) —

    the fence used to start the code block like ““‘”.

  • lang (String) —

    any extra string after the fence like for example a fence of ““‘ruby” the lang would be “ruby”.

  • code (String) —

    the code block contents inside the fence.

  • context (Context::Execution) —

    The details about where the code block came from.



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# File 'lib/rundoc/fenced_code_block.rb', line 27

def initialize(fence:, lang:, code:, context:)
  @fence = fence
  @lang = lang
  @code = code
  @executed = false
  @env = {}
  @stack = []
  @context = context
  @rendered = ""
  self.class.parse_code_commands(@code).each do |code_command|
    @stack.unshift(code_command)
  end

  PARTIAL_RESULT.clear
  PARTIAL_ENV.clear
end

Instance Attribute Details

#code ⇒ Object

Returns the value of attribute code.



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# File 'lib/rundoc/fenced_code_block.rb', line 9

def code
  @code
end

#fence ⇒ Object

Returns the value of attribute fence.



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# File 'lib/rundoc/fenced_code_block.rb', line 9

def fence
  @fence
end

#lang ⇒ Object

Returns the value of attribute lang.



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# File 'lib/rundoc/fenced_code_block.rb', line 9

def lang
  @lang
end

Class Method Details

.parse_code_commands(code) ⇒ Object 



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# File 'lib/rundoc/fenced_code_block.rb', line 114

def self.parse_code_commands(code)
  parser = Rundoc::PegParser.new.code_block
  tree = parser.parse(code)
  commands = Rundoc::PegTransformer.new.apply(tree)
  commands = [commands] unless commands.is_a?(Array)
  commands
rescue ::Parslet::ParseFailed => e
  raise "Could not compile code:\n#{code}\nReason: #{e.message}"
end

.partial_result_to_doc ⇒ Object 



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# File 'lib/rundoc/fenced_code_block.rb', line 85

def self.partial_result_to_doc
  to_doc(result: PARTIAL_RESULT, env: PARTIAL_ENV)
end

.to_doc(result:, env:) ⇒ Object 



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# File 'lib/rundoc/fenced_code_block.rb', line 89

def self.to_doc(result:, env:)
  array = [env[:before]]

  result.flatten!
  result.compact!
  result.map! { |s| s.respond_to?(:rstrip) ? s.rstrip : s }
  result.reject!(&:empty?)
  result.map!(&:to_s)

  if !result.empty?
    array << env[:fence_start]
    array << result
    array << env[:fence_end]
  end
  array << env[:after]

  array.flatten!
  array.compact!
  array.map! { |s| s.respond_to?(:rstrip) ? s.rstrip : s }
  array.reject!(&:empty?)
  array.map!(&:to_s)

  array.join("\n") << "\n"
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/rundoc/fenced_code_block.rb', line 44

def call
  return self if @executed
  @executed = true

  result = []
  env = @env
  env[:commands] = []
  env[:fence_start] = "#{fence}#{lang}"
  env[:fence_end] = "#{fence}#{AUTOGEN_WARNING}"
  env[:before] = []
  env[:after] = []
  env[:context] = @context
  env[:stack] = @stack

  while (code_command = @stack.pop)
    code_output = code_command.call(env) || ""
    code_line = code_command.to_md(env) || ""
    result << code_line if code_command.render_command?
    result << code_output if code_command.render_result?

    PARTIAL_RESULT.replace(result)
    PARTIAL_ENV.replace(env)

    env[:commands] << {
      object: code_command,
      output: code_output,
      command: code_line
    }
  end

  if env[:commands].any? { |c| c[:object].not_hidden? }
    @rendered = self.class.to_doc(result: result, env: env)
  end
  self
end

#executed_commands ⇒ Object

Used for tests to inspect the command that was executed



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# File 'lib/rundoc/fenced_code_block.rb', line 15

def executed_commands
  raise "Nothing executed" unless @env[:commands].any?

  @env[:commands].map { |c| c[:object] }
end

#render ⇒ Object 



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# File 'lib/rundoc/fenced_code_block.rb', line 80

def render
  call
  @rendered
end