Class: ShowCode::Code

Inherits:
Object
  • Object
show all
Defined in:
lib/show_code/code.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(location) ⇒ Code

Returns a new instance of Code.



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# File 'lib/show_code/code.rb', line 7

def initialize(location)
  @file         = location.file
  file_lines    = File.readlines(@file) if @file

  @line         = real_start_line file_lines, location.line
  related_lines = file_lines[(@line - 1)..-1] || []

  codes         = extract_method_code related_lines
  @lines        = codes.count
  @content      = codes.join
end

Instance Attribute Details

#content ⇒ Object (readonly)

Returns the value of attribute content.



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# File 'lib/show_code/code.rb', line 5

def content
  @content
end

#file ⇒ Object (readonly)

Returns the value of attribute file.



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# File 'lib/show_code/code.rb', line 5

def file
  @file
end

#line ⇒ Object (readonly)

Returns the value of attribute line.



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# File 'lib/show_code/code.rb', line 5

def line
  @line
end

#lines ⇒ Object (readonly)

Returns the value of attribute lines.



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# File 'lib/show_code/code.rb', line 5

def lines
  @lines
end

#owner ⇒ Object (readonly)

Returns the value of attribute owner.



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# File 'lib/show_code/code.rb', line 5

def owner
  @owner
end

Instance Method Details

#add_line_numbers(output) ⇒ Object 



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# File 'lib/show_code/code.rb', line 58

def add_line_numbers(output)
  line_number = line - 1
  output.split("\n").map do |loc|
    line_number += 1
    "\e[33m#{line_number.to_s.ljust(4, ' ')}\e[0m#{loc}"
  end.join("\n")
end

#expression_end?(codes) ⇒ Boolean

refer: gist.github.com/judofyr/1373383

Returns:

  • (Boolean) 


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# File 'lib/show_code/code.rb', line 38

def expression_end?(codes)
  str = codes.join

  catch(:valid) do
    eval("BEGIN{throw :valid}; #{str}")
  end

  # skip , or    str !~ /[,\\]\s*\z/
rescue SyntaxException
  false
end

#extract_method_code(related_lines) ⇒ Object

Raises:

  • (SyntaxError) 


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# File 'lib/show_code/code.rb', line 28

def extract_method_code(related_lines)
  codes = []
  related_lines.each do |loc|
    codes << loc
    return codes if expression_end?(codes)
  end
  raise SyntaxError, "unexpected $end"
end

#greet ⇒ Object

Example: ShowCode ‘ShowCode::Code.new.greet’



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# File 'lib/show_code/code.rb', line 67

def greet
  puts 'Hello ShowCode!'
end

#highlighted(opts = {}) ⇒ Object 



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# File 'lib/show_code/code.rb', line 51

def highlighted(opts = {})
  options = {:line_numbers => true}.merge(opts)
  colorized = CodeRay.scan(content, :ruby).tty
  output = options[:line_numbers] ? add_line_numbers(colorized) : colorized
  "\n%s\n\n" % output
end

#real_start_line(file_lines, line) ⇒ Object 



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# File 'lib/show_code/code.rb', line 19

def real_start_line(file_lines, line)
  return line unless line.zero?

  file_lines.each do |loc|
    line += 1
    return line if /^\s*(class|module)\s+[A-Z]/ === loc
  end
end