regexps.rb in css_parser-1.8.0

- old
+ new

@@ -1,67 +1,70 @@
+# frozen_string_literal: true
+
 module CssParser
-  def self.regex_possible_values *values
+  def self.regex_possible_values(*values)
     Regexp.new("([\s]*^)?(#{values.join('|')})([\s]*$)?", 'i')
   end
 
   # :stopdoc:
   # Base types
   RE_NL = Regexp.new('(\n|\r\n|\r|\f)')
-  RE_NON_ASCII = Regexp.new('([\x00-\xFF])', Regexp::IGNORECASE, 'n')  #[^\0-\177]
+  RE_NON_ASCII = Regexp.new('([\x00-\xFF])', Regexp::IGNORECASE, 'n') # [^\0-\177]
   RE_UNICODE = Regexp.new('(\\\\[0-9a-f]{1,6}(\r\n|[ \n\r\t\f])*)', Regexp::IGNORECASE | Regexp::EXTENDED | Regexp::MULTILINE, 'n')
   RE_ESCAPE = Regexp.union(RE_UNICODE, '|(\\\\[^\n\r\f0-9a-f])')
   RE_IDENT = Regexp.new("[\-]?([_a-z]|#{RE_NON_ASCII}|#{RE_ESCAPE})([_a-z0-9\-]|#{RE_NON_ASCII}|#{RE_ESCAPE})*", Regexp::IGNORECASE, 'n')
 
   # General strings
-  RE_STRING1 = Regexp.new('(\"(.[^\n\r\f\\"]*|\\\\' + RE_NL.to_s + '|' + RE_ESCAPE.to_s + ')*\")')
-  RE_STRING2 = Regexp.new('(\'(.[^\n\r\f\\\']*|\\\\' + RE_NL.to_s + '|' + RE_ESCAPE.to_s + ')*\')')
+  RE_STRING1 = /("(.[^\n\r\f"]*|\\#{RE_NL}|#{RE_ESCAPE})*")/.freeze
+  RE_STRING2 = /('(.[^\n\r\f']*|\\#{RE_NL}|#{RE_ESCAPE})*')/.freeze
   RE_STRING = Regexp.union(RE_STRING1, RE_STRING2)
 
   RE_INHERIT = regex_possible_values 'inherit'
 
-  RE_URI = Regexp.new('(url\([\s]*([\s]*' + RE_STRING.to_s + '[\s]*)[\s]*\))|(url\([\s]*([!#$%&*\-~]|' + RE_NON_ASCII.to_s + '|' + RE_ESCAPE.to_s + ')*[\s]*)\)', Regexp::IGNORECASE | Regexp::EXTENDED  | Regexp::MULTILINE, 'n')
-  URI_RX = /url\(("([^"]*)"|'([^']*)'|([^)]*))\)/im
-  RE_GRADIENT = /[-a-z]*gradient\([-a-z0-9 .,#%()]*\)/im
+  RE_URI = /(url\(\s*(\s*#{RE_STRING}\s*)\s*\))|(url\(\s*([!#$%&*\-~]|#{RE_NON_ASCII}|#{RE_ESCAPE})*\s*)\)/ixm.freeze
+  URI_RX = /url\(("([^"]*)"|'([^']*)'|([^)]*))\)/im.freeze
+  RE_GRADIENT = /[-a-z]*gradient\([-a-z0-9 .,#%()]*\)/im.freeze
 
   # Initial parsing
-  RE_AT_IMPORT_RULE = /\@import\s+(url\()?["']?(.[^'"\s]*)["']?\)?([\w\s\,^\])]*)\)?;?/
+  RE_AT_IMPORT_RULE = /@import\s+(url\()?["']?(.[^'"\s]*)["']?\)?([\w\s,^\])]*)\)?;?/.freeze
 
   #--
-  #RE_AT_MEDIA_RULE = Regexp.new('(\"(.[^\n\r\f\\"]*|\\\\' + RE_NL.to_s + '|' + RE_ESCAPE.to_s + ')*\")')
+  # RE_AT_MEDIA_RULE = Regexp.new('(\"(.[^\n\r\f\\"]*|\\\\' + RE_NL.to_s + '|' + RE_ESCAPE.to_s + ')*\")')
 
-  #RE_AT_IMPORT_RULE = Regexp.new('@import[\s]*(' + RE_STRING.to_s + ')([\w\s\,]*)[;]?', Regexp::IGNORECASE) -- should handle url() even though it is not allowed
+  # RE_AT_IMPORT_RULE = Regexp.new('@import[\s]*(' + RE_STRING.to_s + ')([\w\s\,]*)[;]?', Regexp::IGNORECASE) -- should handle url() even though it is not allowed
   #++
-  IMPORTANT_IN_PROPERTY_RX = /[\s]*!important\b[\s]*/i
+  IMPORTANT_IN_PROPERTY_RX = /\s*!important\b\s*/i.freeze
 
   RE_INSIDE_OUTSIDE = regex_possible_values 'inside', 'outside'
   RE_SCROLL_FIXED = regex_possible_values 'scroll', 'fixed'
   RE_REPEAT = regex_possible_values 'repeat(\-x|\-y)*|no\-repeat'
-  RE_LIST_STYLE_TYPE = regex_possible_values 'disc', 'circle', 'square', 'decimal-leading-zero', 'decimal', 'lower-roman',
-                                             'upper-roman', 'lower-greek', 'lower-alpha', 'lower-latin', 'upper-alpha',
-                                             'upper-latin', 'hebrew', 'armenian', 'georgian', 'cjk-ideographic', 'hiragana',
-                                             'hira-gana-iroha', 'katakana-iroha', 'katakana', 'none'
+  RE_LIST_STYLE_TYPE = regex_possible_values(
+    'disc', 'circle', 'square', 'decimal-leading-zero', 'decimal', 'lower-roman',
+    'upper-roman', 'lower-greek', 'lower-alpha', 'lower-latin', 'upper-alpha',
+    'upper-latin', 'hebrew', 'armenian', 'georgian', 'cjk-ideographic', 'hiragana',
+    'hira-gana-iroha', 'katakana-iroha', 'katakana', 'none'
+  )
 
-  STRIP_CSS_COMMENTS_RX = /\/\*.*?\*\//m
-  STRIP_HTML_COMMENTS_RX = /\<\!\-\-|\-\-\>/m
+  STRIP_CSS_COMMENTS_RX = %r{/\*.*?\*/}m.freeze
+  STRIP_HTML_COMMENTS_RX = /<!--|-->/m.freeze
 
   # Special units
-  BOX_MODEL_UNITS_RX = /(auto|inherit|0|([\-]*([0-9]+|[0-9]*\.[0-9]+)(rem|vw|vh|vm|vmin|vmax|e[mx]+|px|[cm]+m|p[tc+]|in|\%)))([\s;]|\Z)/imx
+  BOX_MODEL_UNITS_RX = /(auto|inherit|0|(-*([0-9]+|[0-9]*\.[0-9]+)(rem|vw|vh|vm|vmin|vmax|e[mx]+|px|[cm]+m|p[tc+]|in|%)))([\s;]|\Z)/imx.freeze
   RE_LENGTH_OR_PERCENTAGE = Regexp.new('([\-]*(([0-9]*\.[0-9]+)|[0-9]+)(e[mx]+|px|[cm]+m|p[tc+]|in|\%))', Regexp::IGNORECASE)
   RE_BACKGROUND_POSITION = Regexp.new("((((#{RE_LENGTH_OR_PERCENTAGE})|left|center|right|top|bottom)[\s]*){1,2})", Regexp::IGNORECASE | Regexp::EXTENDED)
   RE_BACKGROUND_SIZE = Regexp.new("\\s*/\\s*((((#{RE_LENGTH_OR_PERCENTAGE})|auto|cover|contain|initial|inherit)[\\s]*){1,2})", Regexp::IGNORECASE | Regexp::EXTENDED)
-  FONT_UNITS_RX = /(([x]+\-)*small|medium|large[r]*|auto|inherit|([0-9]+|[0-9]*\.[0-9]+)(e[mx]+|px|[cm]+m|p[tc+]|in|\%)*)/i
-  RE_BORDER_STYLE = /([\s]*^)?(none|hidden|dotted|dashed|solid|double|dot-dash|dot-dot-dash|wave|groove|ridge|inset|outset)([\s]*$)?/imx
+  FONT_UNITS_RX = /((x+-)*small|medium|larger*|auto|inherit|([0-9]+|[0-9]*\.[0-9]+)(e[mx]+|px|[cm]+m|p[tc+]|in|%)*)/i.freeze
+  RE_BORDER_STYLE = /(\s*^)?(none|hidden|dotted|dashed|solid|double|dot-dash|dot-dot-dash|wave|groove|ridge|inset|outset)(\s*$)?/imx.freeze
   RE_BORDER_UNITS = Regexp.union(BOX_MODEL_UNITS_RX, /(thin|medium|thick)/i)
 
-
   # Patterns for specificity calculations
-  NON_ID_ATTRIBUTES_AND_PSEUDO_CLASSES_RX_NC= /
-    (?:\.[\w]+)                     # classes
+  NON_ID_ATTRIBUTES_AND_PSEUDO_CLASSES_RX_NC = /
+    (?:\.\w+)                     # classes
     |
     \[(?:\w+)                       # attributes
     |
-    (?:\:(?:                          # pseudo classes
+    (?::(?:                          # pseudo classes
       link|visited|active
       |hover|focus
       |lang
       |target
       |enabled|disabled|checked|indeterminate
@@ -69,20 +72,20 @@
       |nth-child|nth-last-child|nth-of-type|nth-last-of-type
       |first-child|last-child|first-of-type|last-of-type
       |only-child|only-of-type
       |empty|contains
     ))
-  /ix
+  /ix.freeze
   ELEMENTS_AND_PSEUDO_ELEMENTS_RX_NC = /
-    (?:(?:^|[\s\+\>\~]+)[\w]+       # elements
+    (?:(?:^|[\s+>~]+)\w+       # elements
     |
-    \:{1,2}(?:                    # pseudo-elements
+    :{1,2}(?:                    # pseudo-elements
       after|before
       |first-letter|first-line
       |selection
     )
-  )/ix
+  )/ix.freeze
 
   # Colours
   NAMED_COLOURS = %w[
     aliceblue
     antiquewhite
@@ -233,13 +236,13 @@
     yellowgreen
 
     transparent
     inherit
     currentColor
-  ]
-  RE_COLOUR_NUMERIC = /\b(hsl|rgb)\s*\(-?\s*-?\d+(\.\d+)?%?\s*%?,-?\s*-?\d+(\.\d+)?%?\s*%?,-?\s*-?\d+(\.\d+)?%?\s*%?\)/i
-  RE_COLOUR_NUMERIC_ALPHA = /\b(hsla|rgba)\s*\(-?\s*-?\d+(\.\d+)?%?\s*%?,-?\s*-?\d+(\.\d+)?%?\s*%?,-?\s*-?\d+(\.\d+)?%?\s*%?,-?\s*-?\d+(\.\d+)?%?\s*%?\)/i
-  RE_COLOUR_HEX = /\s*#([0-9a-fA-F]{6}|[0-9a-fA-F]{3})\b/
-  RE_COLOUR_NAMED = /\s*\b(#{NAMED_COLOURS.join('|')})\b/i
+  ].freeze
+  RE_COLOUR_NUMERIC = /\b(hsl|rgb)\s*\(-?\s*-?\d+(\.\d+)?%?\s*%?,-?\s*-?\d+(\.\d+)?%?\s*%?,-?\s*-?\d+(\.\d+)?%?\s*%?\)/i.freeze
+  RE_COLOUR_NUMERIC_ALPHA = /\b(hsla|rgba)\s*\(-?\s*-?\d+(\.\d+)?%?\s*%?,-?\s*-?\d+(\.\d+)?%?\s*%?,-?\s*-?\d+(\.\d+)?%?\s*%?,-?\s*-?\d+(\.\d+)?%?\s*%?\)/i.freeze
+  RE_COLOUR_HEX = /\s*#([0-9a-fA-F]{6}|[0-9a-fA-F]{3})\b/.freeze
+  RE_COLOUR_NAMED = /\s*\b(#{NAMED_COLOURS.join('|')})\b/i.freeze
   RE_COLOUR = Regexp.union(RE_COLOUR_NUMERIC, RE_COLOUR_NUMERIC_ALPHA, RE_COLOUR_HEX, RE_COLOUR_NAMED)
   # :startdoc:
 end