Class: Condenser::SVGTransformer::Template

Inherits:
Object
  • Object
show all
Includes:
ParseHelpers
Defined in:
lib/condenser/transformers/svg_transformer/template.rb

Constant Summary collapse

START_TAGS = 
['<']
CLOSE_TAGS = 
['/>', '>']
VOID_ELEMENTS = 
['!DOCTYPE', '?xml']

Instance Attribute Summary collapse

Attributes included from ParseHelpers

#matched

Instance Method Summary collapse

Methods included from ParseHelpers

#current_line, #cursor, #eos?, #forward, #next_word, #pre_match, #rewind, #scan_until, #seek

Constructor Details

#initialize(source) ⇒ Template

Returns a new instance of Template.



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# File 'lib/condenser/transformers/svg_transformer/template.rb', line 11

def initialize(source)
  @source = source.strip
  process
end

Instance Attribute Details

#source ⇒ Object

Returns the value of attribute source.



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# File 'lib/condenser/transformers/svg_transformer/template.rb', line 5

def source
  @source
end

Instance Method Details

#process ⇒ Object 



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# File 'lib/condenser/transformers/svg_transformer/template.rb', line 16

def process
  seek(0)
  @tree =   [Condenser::SVGTransformer::Base.new]
  @stack =  [:str]
  
  while !eos?
    case @stack.last
    when :str
      scan_until(Regexp.new("(#{START_TAGS.map{|s| Regexp.escape(s) }.join('|')}|\\z)"))
      if !matched.nil? && START_TAGS.include?(matched)
        @stack << :tag
      end
    when :tag
      scan_until(Regexp.new("(\\/|[^\\s>]+)"))
      if matched == '/'
        @stack.pop
        @stack << :close_tag
      else
        @tree << Condenser::SVGTransformer::Tag.new(matched)
        @stack << :tag_attr_key
      end
    when :close_tag
      scan_until(Regexp.new("([^\\s>]+)"))

      el = @tree.pop
      if el.tag_name != matched
        raise Condenser::SVGTransformer::TemplateError.new("Expected to close #{el.tag_name.inspect} tag, instead closed #{matched.inspect}\n#{cursor}")
      end
      if !['!DOCTYPE', '?xml'].include?(el.tag_name)
        @tree.last.children << el
        scan_until(Regexp.new("(#{CLOSE_TAGS.map{|s| Regexp.escape(s) }.join('|')})"))
        @stack.pop
      end
    when :tag_attr_key
      scan_until(Regexp.new("(#{CLOSE_TAGS.map{|s| Regexp.escape(s) }.join('|')}|[^\\s=>]+)"))
      if CLOSE_TAGS.include?(matched)
        if matched == '/>' || VOID_ELEMENTS.include?(@tree.last.tag_name)
          el = @tree.pop
          @tree.last.children << el
          @stack.pop
          @stack.pop
        else
          @stack << :str
        end
      else
        key = if matched.start_with?('"') && matched.end_with?('"')
          matched[1..-2]
        elsif matched.start_with?('"') && matched.end_with?('"')
          matched[1..-2]
        else
          matched
        end
        @tree.last.attrs << key
        @stack << :tag_attr_value_tx
      end
    when :tag_attr_value_tx
      scan_until(Regexp.new("(#{(CLOSE_TAGS).map{|s| Regexp.escape(s) }.join('|')}|=|\\S)"))
      tag_key = @tree.last.attrs.pop
      if CLOSE_TAGS.include?(matched)
        el = @tree.last
        el.attrs << tag_key
        if VOID_ELEMENTS.include?(el.tag_name)
          @tree.pop
          @tree.last.children << el
        end
        @stack.pop
        @stack.pop
        @stack.pop
      elsif matched == '='
        @stack.pop
        @tree.last.attrs << tag_key
        @stack << :tag_attr_value
      else
        @stack.pop
        @tree.last.attrs << tag_key
        rewind(1)
      end

    when :tag_attr_value
      scan_until(Regexp.new("(#{CLOSE_TAGS.map{|s| Regexp.escape(s) }.join('|')}|'|\"|\\S+)"))

      if matched == '"'
        @stack.pop
        @stack << :tag_attr_value_double_quoted
      elsif matched == "'"
        @stack.pop
        @stack << :tag_attr_value_single_quoted
      else
        @stack.pop
        key = @tree.last.attrs.pop
        @tree.last.namespace = matched if key == 'xmlns'
        @tree.last.attrs << { key => matched }
      end
    when :tag_attr_value_double_quoted
      quoted_value = ''
      scan_until(/"/)
      quoted_value << pre_match if !pre_match.strip.empty?
      rewind(1)

      quoted_value = Condenser::SVGTransformer::Value.new(quoted_value)

      key = @tree.last.attrs.pop
      @tree.last.namespace = quoted_value if key == 'xmlns'
      if @tree.last.attrs.last.is_a?(Hash) && !@tree.last.attrs.last.has_key?(key)
        @tree.last.attrs.last[key] = quoted_value
      else
        @tree.last.attrs << { key => quoted_value }
      end
      scan_until(/\"/)
      @stack.pop
    when :tag_attr_value_single_quoted
      quoted_value = ''
      scan_until(/(')/)
      quoted_value << pre_match if !pre_match.strip.empty?
      rewind(1)

      quoted_value = Condenser::SVGTransformer::Value.new(quoted_value)

      key = @tree.last.attrs.pop
      @tree.last.namespace = quoted_value if key == 'xmlns'
      if @tree.last.attrs.last.is_a?(Hash) && !@tree.last.attrs.last.has_key?(key)
        @tree.last.attrs.last[key] = quoted_value
      else
        @tree.last.attrs << { key => quoted_value }
      end
      scan_until(/\'/)
      @stack.pop
    end
  end
end

#to_module ⇒ Object 



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# File 'lib/condenser/transformers/svg_transformer/template.rb', line 147

def to_module
  @tree.first.to_module
end