Class: WebpageArchivist::StylesheetDocument

Inherits:
Object
  • Object
show all
Defined in:
lib/webpage-archivist/stylesheet_document.rb

Overview

Wrapper around css_parser

Constant Summary collapse

CONVERTER = 
Iconv.new('UTF-8//IGNORE//TRANSLIT', 'ASCII//IGNORE//TRANSLIT')

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(content, base_uri, charset = nil) ⇒ StylesheetDocument

Returns a new instance of StylesheetDocument.



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# File 'lib/webpage-archivist/stylesheet_document.rb', line 63

def initialize content, base_uri, charset = nil
  @base_uri = base_uri
  @parser = CssParser::Parser.new :import => false

  @charset = charset
  unless @charset
    content = CONVERTER.iconv(content)
    @charset = 'ASCII-8BIT'
  end

  parser.add_block_archivist(content, {:base_uri => base_uri, :charset => @charset})
  @expanded = false
end

Instance Attribute Details

#charset ⇒ Object (readonly)

Returns the value of attribute charset.



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# File 'lib/webpage-archivist/stylesheet_document.rb', line 61

def charset
  @charset
end

#parser ⇒ Object (readonly)

Returns the value of attribute parser.



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# File 'lib/webpage-archivist/stylesheet_document.rb', line 61

def parser
  @parser
end

Instance Method Details

#each_image(&block) ⇒ Object

Call a block for each image Block call parameter will be the image uri, if the block return something it will replace the uri



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# File 'lib/webpage-archivist/stylesheet_document.rb', line 99

def each_image &block
  expand_if_needed
  parser.each_rule_set do |rs|
    rs.declarations.each do |r|
      value = r[1][:value]
      if uri = /url\(['|"]([^']+)['|"]\)/i.match(value)
        uri = uri[1]
        if (uri = block.yield(uri))
          r[1][:value] = "url(\"#{uri}\")"
        end
      end
    end
  end
end

#each_import(&block) ⇒ Object

Call a block for each import Block call parameter will be the import’s uri if the block return something it will replace the uri



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# File 'lib/webpage-archivist/stylesheet_document.rb', line 90

def each_import &block
  parser.imports.collect! do |uri|
    block.yield(uri) || uri
  end
end

#expand_if_needed ⇒ Object 



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# File 'lib/webpage-archivist/stylesheet_document.rb', line 77

def expand_if_needed
  unless @expanded
    parser.each_rule_set do |rs|
      rs.expand_background_shorthand!
      rs.expand_list_style_shorthand!
    end
    @expanded = true
  end
end

#to_css ⇒ Object

Get the css content



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# File 'lib/webpage-archivist/stylesheet_document.rb', line 115

def to_css
  parser.to_s
end