Module: REPLUtils

Defined in:
opal/stdlib/opal-replutils.rb

Defined Under Namespace

Classes: ColorPrinter

Class Method Summary collapse

Class Method Details

.eval_and_print(func, mode, colorize, binding = nil) ⇒ Object

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# File 'opal/stdlib/opal-replutils.rb', line 46

def eval_and_print(func, mode, colorize, binding = nil)
  printer = if colorize
              ->(i) do
                ColorPrinter.default(i)
              rescue => e
                ColorPrinter.colorize(Opal.inspect(i))
              end
            else
              ->(i) do
                out = []
                PP.pp(i, out)
                out.join
              rescue
                Opal.inspect(i)
              end
            end

  %x{
    var $_result = binding === nil ? eval(func) : binding.$js_eval(func);

    if (mode == 'silent') return nil;

    if ($_result === null) {
      return "=> null";
    }
    else if (typeof $_result === 'undefined') {
      return "=> undefined";
    }
    else if (typeof $_result.$$class === 'undefined') {
      try {
        var json = JSON.stringify($_result, null, 2);
        if (!colorize) json = #{ColorPrinter.colorize(`json`)}
        return "=> " + $_result.toString() + " => " + json;
      }
      catch(e) {
        return "=> " + $_result.toString();
      }
    }
    else {
      if (mode == 'ls') {
        return #{ls(`$_result`, colorize)};
      }
      else {
        var pretty = #{printer.call(`$_result`)};
        // Is it multiline? If yes, add a linebreak
        if (pretty.match(/\n.*?\n/)) pretty = "\n" + pretty;
        return "=> " + pretty;
      }
    }
  }
rescue Exception => e # rubocop:disable Lint/RescueException
  e.full_message(highlight: true)
end

.js_repl ⇒ Object

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# File 'opal/stdlib/opal-replutils.rb', line 100

def js_repl
  while (line = gets)
    input = JSON.parse(line)

    out = eval_and_print(input[:code], input[:mode], input[:colors])
    puts out if out
    puts '<<<ready>>>'
  end
end

.ls(object, colorize) ⇒ Object

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# File 'opal/stdlib/opal-replutils.rb', line 8

def ls(object, colorize)
  methods = imethods = object.methods
  ancestors = object.class.ancestors
  constants = []
  ivs = object.instance_variables
  cvs = []

  if [Class, Module].include? object.class
    imethods = object.instance_methods
    ancestors = object.ancestors
    constants = object.constants
    cvs = object.class_variables
  end

  if colorize
    blue      = ->(i) { "\e[1;34m#{i}\e[0m" }
    dark_blue = ->(i) { "\e[34m#{i}\e[0m" }
  else
    blue = dark_blue = ->(i) { i }
  end

  out = ''
  out = "#{blue['class variables']}: #{cvs.map { |i| dark_blue[i] }.sort.join('  ')}\n" + out unless cvs.empty?
  out = "#{blue['instance variables']}: #{ivs.map { |i| dark_blue[i] }.sort.join('  ')}\n" + out unless ivs.empty?
  ancestors.each do |a|
    im = a.instance_methods(false)
    meths = (im & imethods)
    methods -= meths
    imethods -= meths
    next if meths.empty? || [Object, BasicObject, Kernel, PP::ObjectMixin].include?(a)
    out = "#{blue["#{a.name}#methods"]}: #{meths.sort.join('  ')}\n" + out
  end
  methods &= object.methods(false)
  out = "#{blue['self.methods']}: #{methods.sort.join('  ')}\n" + out unless methods.empty?
  out = "#{blue['constants']}: #{constants.map { |i| dark_blue[i] }.sort.join('  ')}\n" + out unless constants.empty?
  out
end