Return line number

[mike-engel]

It would be nice to return a line number during each_selector for the current selector to use as a reference.

[rex]

THIS. So much this. I'm building a small frontend auditing tool for my job intended to read in massive legacy stylesheets and display statistics/information as well as offer suggestions on how to reorganize them into a modular SCSS/SASS structure. I was hoping to implement functionality into this tool that would allow users (read: devs) to search for selectors and be able to locate these selectors in a given file by a given line number.

Is there a way for each_selector() to pass an additional parameter line to make this functionality easy to implement? In a perfect world, there would even be an additional parameter file to make it even easier. Perhaps the two could even be combined, vis-a-vis a Javascript stack trace (e.g. foo/bar/baz.css#27 for line 27 of foo/bar/baz.css?

[akzhan]

Looks like will be contributed by #85

[G0dwin]

You can now get byte offsets for a rule, from that you should be able to get the line number by re-loading the original file yourself.

I haven't tested this myself but you should be able to do something like:

def find_lines_by_selector(uri, selector)
  # download the css file yourself
  css_content = open(uri).read

  # let CssParser parse the file
  parser = CssParser.new
  parser.load_uri!(uri, capture_offsets: true)

  # collect lines where we find a matching selector
  matching_lines = []
  parser.each_rule_set(media_types) do |rule_set, media_type|
    # see if this rule set contains the selector
    if rule_set.selectors.include?(selector)
      # it does, so get the original content from the start fo the file, up until
      # the start of this rule, then count the number of lines
      matching_lines << css_content[0..rule_set.offset.first].lines.count
    end
  end
end

Eventually it would be nice to have the option to cache the CSS file within the parser if we intend to use it like this.

[akzhan]

Just note that is't released as 1.5.0.pre