Class: ImageCheck

Inherits:
HTMLProofer::Check show all
Defined in:
lib/html-proofer/check/images.rb

Constant Summary collapse

SCREEN_SHOT_REGEX = 
/Screen(?: |%20)Shot(?: |%20)\d+-\d+-\d+(?: |%20)at(?: |%20)\d+.\d+.\d+/

Instance Attribute Summary

Attributes inherited from HTMLProofer::Check

#element, #external_urls, #html, #issues, #node, #options, #path, #src

Instance Method Summary collapse

Methods inherited from HTMLProofer::Check

#add_issue, #add_path_for_url, #add_to_external_urls, #blank?, #create_element, #initialize, subchecks

Constructor Details

This class inherits a constructor from HTMLProofer::Check

Instance Method Details

#empty_alt_tag? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/html-proofer/check/images.rb', line 4

def empty_alt_tag?
  @img.alt.strip.empty?
end

#missing_src? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/html-proofer/check/images.rb', line 12

def missing_src?
  blank?(@img.url)
end

#run ⇒ Object 



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# File 'lib/html-proofer/check/images.rb', line 16

def run
  @html.css('img').each do |node|
    @img = create_element(node)
    line = node.line
    content = node.content

    next if @img.ignore?

    # screenshot filenames should return because of terrible names
    if terrible_filename?
      add_issue("image has a terrible filename (#{@img.url})", line: line, content: content)
      next
    end

    # does the image exist?
    if missing_src?
      add_issue('image has no src or srcset attribute', line: line, content: content)
    else
      if @img.remote?
        add_to_external_urls(@img.url)
      elsif !@img.exists?
        add_issue("internal image #{@img.url} does not exist", line: line, content: content)
      end
    end

    if !@img.ignore_alt? && (@img.alt.nil? || (empty_alt_tag? && !@img.ignore_empty_alt?))
      add_issue("image #{@img.url} does not have an alt attribute", line: line, content: content)
    end

    if @img.check_img_http? && @img.scheme == 'http'
      add_issue("image #{@img.url} uses the http scheme", line: line, content: content)
    end
  end

  external_urls
end

#terrible_filename? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/html-proofer/check/images.rb', line 8

def terrible_filename?
  @img.url =~ SCREEN_SHOT_REGEX
end