Class: Rtlize::RTLizer

Inherits:
Object
  • Object
show all
Defined in:
lib/rtlize/rtlizer.rb

Overview

Originally ported from github.com/ded/R2

Class Method Summary collapse

Class Method Details

.cursor(v) ⇒ Object 



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# File 'lib/rtlize/rtlizer.rb', line 154

def cursor(v)
  if v.match(/^[ns]?e-resize$/)
    v.gsub(/e-resize/, 'w-resize')
  elsif v.match(/^[ns]?w-resize$/)
    v.gsub(/w-resize/, 'e-resize')
  else
    v
  end
end

.deg(v) ⇒ Object 



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# File 'lib/rtlize/rtlizer.rb', line 184

def deg(v)
  if v == '0'
    v
  else
    old_angle = v.to_f
    new_angle = 360 - old_angle
    new_angle = new_angle.to_i if new_angle == new_angle.to_i # If it's an integer, write it without a decimal part.
    v.gsub(/[0-9.]+/, new_angle.to_s)
  end
end

.direction(v) ⇒ Object 



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# File 'lib/rtlize/rtlizer.rb', line 119

def direction(v)
  v == 'ltr' ? 'rtl' : v == 'rtl' ? 'ltr' : v
end

.quad(v) ⇒ Object 



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# File 'lib/rtlize/rtlizer.rb', line 134

def quad(v)
  # 1px 2px 3px 4px => 1px 4px 3px 2px
  m = v.split(/\s+/)
  m.length == 4 ? [m[0], m[3], m[2], m[1]].join(' ') : v
end

.quad_radius(v) ⇒ Object 



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# File 'lib/rtlize/rtlizer.rb', line 140

def quad_radius(v)
  # top-left, top-right, bottom-right, bottom-left
  # when bottom-left is omitted, it takes the value of top-right
  # when bottom-right is omitted, it takes the value of top-left
  # when top-right is omitted, it takes the value of top-left
  m = v.split(/\s+/)
  case m.length
  when 4 then [m[1], m[0], m[3], m[2]].join(' ')
  when 3 then [m[1], m[0], m[1], m[2]].join(' ')
  when 2 then [m[1], m[0]].join(' ')
  else v
  end
end

.rect(v) ⇒ Object 



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# File 'lib/rtlize/rtlizer.rb', line 123

def rect(v)
  if v.match(/rect\([^)]*\)/)
    v.gsub(/\([^)]*\)/) do |m|
      parts = m.gsub(/[()]/, '').split(',').map(&:strip)
      "(#{parts[0]}, #{parts[3]}, #{parts[2]}, #{parts[1]})"
    end
  else
    v
  end
end

.rtltr(v) ⇒ Object 



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# File 'lib/rtlize/rtlizer.rb', line 115

def rtltr(v)
  v == 'left' ? 'right' : v == 'right' ? 'left' : v
end

.shadow(v) ⇒ Object 



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# File 'lib/rtlize/rtlizer.rb', line 164

def shadow(v)
  found = false
  v.gsub(/rgba\([^)]*\)|,|#[0-9A-Fa-f]*|[-0-9.px]+/) do |m|
    if m == ","
      # this property can take several comma-seperated values, we account for that, and transform each one correctly.
      found = false
      m
    elsif m.match(/rgba\([^)]*\)|#[0-9A-Fa-f]*/) || found
      m
    else
      found = true
      if m.to_f.zero?
        m
      else
        m.chars.first == '-' ? m[1..-1] : '-' + m
      end
    end
  end
end

.transform(css) ⇒ Object 



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# File 'lib/rtlize/rtlizer.rb', line 66

def transform(css)
  no_invert = false
  css.gsub(/([^{]+\{[^}]+\})+?/) do |rule|
    # Break rule into selector|declaration parts
    parts = rule.match(/([^{]+)\{([^}]+)/)
    if parts && !parts[1].gsub(/\/\*[\s\S]+?\*\//, '').match(/\.rtl\b/) # Don't transform rules that include the selector ".rtl" (remove comments first)
      selector, declarations = parts[1..2]

      # The CSS comment must start with "!" in order to be considered as important by the YUI compressor, otherwise, it will be removed by the asset pipeline before reaching this processor.
      if selector.match(/\/\*!= begin\(no-rtl\) \*\//)
        no_invert = true
        # selector.gsub!(/\/\*!= begin\(no-rtl\) \*\//, '')
      elsif selector.match(/\/\*!= end\(no-rtl\) \*\//)
        no_invert = false
        # selector.gsub!(/\/\*!= end\(no-rtl\) \*\//, '')
      end

      selector + '{' + self.transform_declarations(declarations, no_invert) + '}'
    else
      rule
    end
  end
end

.transform_declarations(declarations, no_invert = false) ⇒ Object 



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# File 'lib/rtlize/rtlizer.rb', line 90

def transform_declarations(declarations, no_invert = false)
  declarations.split(/;(?!base64)/).map do |decl|
    m = decl.match(/([^:]+):(.+)$/)

    if m && !no_invert
      prop, val = m[1..2]
      # Get the property, without comments or spaces, to be able to find it.
      prop_name = prop.strip.split(' ').last
      if @property_map[prop_name]
        prop = prop.sub(prop_name, @property_map[prop_name])
      end

      if @value_map[prop_name]
        val = val.sub(val.strip, self.send(@value_map[prop_name], val.strip))
      end

      prop + ':' + val + ';'
    elsif m
      decl + ';'
    else
      decl
    end
  end.join
end