Class: ViewInspect::Handlers::HTMLTemplate

Inherits:
Object
  • Object
show all
Defined in:
lib/view_inspect/handlers/html_template.rb

Direct Known Subclasses

ERB, Handlebars

Constant Summary collapse

STUB_PREFIX = 
"__template_expression_stub__"

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ HTMLTemplate

Returns a new instance of HTMLTemplate.



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# File 'lib/view_inspect/handlers/html_template.rb', line 9

def initialize
  @expression_stub_map = {}
end

Class Method Details

.expression_regex ⇒ Object 



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# File 'lib/view_inspect/handlers/html_template.rb', line 13

def self.expression_regex
  raise "must be implemented by subclass"
end

Instance Method Details

#add_file_line(source, filepath) ⇒ Object 



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# File 'lib/view_inspect/handlers/html_template.rb', line 27

def add_file_line(source, filepath)
  doc = ::Nokogiri::HTML.fragment(source)

  doc.traverse do |node|
    if node.is_a?(::Nokogiri::XML::Element)
      file_line = [filepath, node.line].join(":")
      node.set_attribute "data-orig-file-line", file_line
    end
  end

  CGI.unescapeHTML(doc.inner_html)
end

#add_file_line_to_html_tags(source, filepath) ⇒ Object 



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# File 'lib/view_inspect/handlers/html_template.rb', line 17

def add_file_line_to_html_tags(source, filepath)
  return source if html_layout?(source) # currently dont support html layout templates

  source = replace_expression_with_stub(source)
  source = add_file_line(source, filepath)
  source = replace_stub_with_expression(source)

  source
end

#replace_expression_with_stub(source) ⇒ Object 



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# File 'lib/view_inspect/handlers/html_template.rb', line 40

def replace_expression_with_stub(source)
  source.gsub(self.class.expression_regex).with_index do |match, index|
    stub = "#{STUB_PREFIX}#{index}"
    stub = preserve_linecount(stub, match)
    @expression_stub_map[stub] = match
    stub
  end
end

#replace_stub_with_expression(source) ⇒ Object 



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# File 'lib/view_inspect/handlers/html_template.rb', line 49

def replace_stub_with_expression(source)
  @expression_stub_map.inject(source) do |result, (stub, expression)|
    result = result.sub(stub, expression)
  end
end