Module: Bovem::ConsoleMethods::StyleHandling::ClassMethods

Defined in:
lib/bovem/console.rb

Overview

Class methods for handling styles in the terminal.

Instance Method Summary collapse

Instance Method Details

#parse_style(style) ⇒ String

Parse a style and returns terminal codes.

Supported styles and colors are those in TERM_COLORS and TERM_EFFECTS. You can also prefix colors with bg_ (like bg_red) for background colors.

Parameters:

  • style (String) —

    The style to parse.

Returns:

  • (String) —

    A string with ANSI color codes.



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# File 'lib/bovem/console.rb', line 28

def parse_style(style)
  style = style.ensure_string.strip.parameterize

  if style.present? then
    Bovem::Console.replace_term_code(Bovem::TERM_EFFECTS, style, 0) ||
      Bovem::Console.replace_term_code(Bovem::TERM_COLORS, style, 30) ||
      Bovem::Console.replace_term_code(Bovem::TERM_COLORS, style.gsub(/^bg_/, ""), 40) ||
      ""
  else
    ""
  end
end

#parse_styles(styles) ⇒ String

Parses a set of styles and returns terminals codes. Supported styles and colors are those in TERM_COLORS and TERM_EFFECTS. You can also prefix colors with bg_ (like bg_red) for background colors.

Parameters:

  • styles (String) —

    The styles to parse.

Returns:

  • (String) —

    A string with ANSI color codes.



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# File 'lib/bovem/console.rb', line 46

def parse_styles(styles)
  styles.split(/\s*[\s,-]\s*/).collect { |s| parse_style(s) }.join("")
end

#replace_markers(message, plain = false) ⇒ String

Replaces colors markers in a string.

You can specify markers by enclosing in {mark=[style]} and {/mark} tags. Separate styles with spaces, dashes or commas. Nesting markers is supported.

Example:

Bovem::Console.new.replace_markers("{mark=bright bg_red}{mark=green}Hello world!{/mark}{/mark}")
# => "\e[1m\e[41m\e[32mHello world!\e[1m\e[41m\e[0m"

Parameters:

  • message (String) —

    The message to analyze.

  • plain (Boolean) (defaults to: false) —

    If ignore (cleanify) color markers into the message.

Returns:

  • (String) —

    The replaced message.

See Also:



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# File 'lib/bovem/console.rb', line 77

def replace_markers(message, plain = false)
  stack = []

  message.ensure_string.gsub(/((\{mark=([a-z\-_\s,]+)\})|(\{\/mark\}))/mi) do
    if $1 == "{/mark}" then # If it is a tag, pop from the latest opened.
      stack.pop
      plain || stack.blank? ? "" : Bovem::Console.parse_styles(stack.last)
    else
      styles = $3.ensure_string
      replacement = plain ? "" : Bovem::Console.parse_styles(styles)

      if replacement.length > 0 then
        stack << "reset" if stack.blank?
        stack << styles
      end

      replacement
    end
  end
end

#replace_term_code(codes, code, modifier = 0) ⇒ String|nil

Replaces a terminal code.

Parameters:

  • codes (Array) —

    The valid list of codes.

  • code (String) —

    The code to lookup.

  • modifier (Fixnum) (defaults to: 0) —

    The modifier to apply to the code.

Returns:

  • (String|nil) —

    The terminal code or nil if the code was not found.



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# File 'lib/bovem/console.rb', line 57

def replace_term_code(codes, code, modifier = 0)
  sym = code.to_sym
  codes.include?(sym) ? "\e[#{modifier + codes[sym]}m" : nil
end