Class: SnapUrl::Application

Inherits:
Object
  • Object
show all
Defined in:
lib/core/application.rb

Class Method Summary collapse

Class Method Details

.parse(args) ⇒ Object

TODO: add option to control log-level TODO: add implementation for verbose run TODO: set –include-format = true if more than one format



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# File 'lib/core/application.rb', line 20

def Application::parse(args)
  options = Camera::DEFAULT_OPTIONS
  begin
    opts = OptionParser.new do |opts|
      opts.banner = <<-EOF
      Usage: #{opts.program_name} url0 [url1] [url2]... [options]

      #{opts.program_name} is a command line tool that creates PNG screenshots of webpages. 
      With tall or wide pages that would normally require scrolling, it takes
      screenshots of the whole webpage, not just the area that would be visible
      in a browser window.

      It is a Ruby/RubyCocoa port of the webkit2png.py script by Paul Hammond
      (http://www.paulhammond.org/webkit2png/)
      EOF
      opts.banner.gsub!(/  /, '')
      
      opts.separator ' '
      opts.separator 'Specific Options:'
      opts.on('--width [WIDTH]', Float, "initial and minimum browser width (default: #{options[:browser][:width].to_i})")     { |n| options[:browser][:width] = n }
      opts.on('--height [HEIGHT]', Float, "initial and minimum browser height (default: #{options[:browser][:height].to_i})") { |n| options[:browser][:height] = n }

      opts.separator ' '
      opts.on('--[no-]fullsize', "create fullsize screenshot")  { |n| n ? options[:snapFormat] << :fullsize  : options[:snapFormat].delete(:fullsize) }
      opts.on('--[no-]thumbnail', "create thumbnail")           { |n| n ? options[:snapFormat] << :thumbnail : options[:snapFormat].delete(:thumbnail) }
      opts.on('--[no-]clip', "create clip of thumbnail")        { |n| n ? options[:snapFormat] << :clip      : options[:snapFormat].delete(:clip) }

      opts.separator ' '
      opts.on('--scale [SCALE]', Float, "scale factor for thumbnails (default: #{options[:scaleFactor]})") { |n| options[:scaleFactor] = n }

      opts.separator ' '
      opts.on('--clipwidth [WIDTH]', Float, "width of clipped thumbnail (default: #{options[:clip][:width].to_i})")     { |n| options[:clip][:width] = n }
      opts.on('--clipheight [HEIGHT]', Float, "height of clipped thumbnail (default: #{options[:clip][:height].to_i})") { |n| options[:clip][:height] = n }

      opts.separator ' '
      opts.on('-f', '--filename [NAME]', "use NAME as part of filename (derived from url if not specified)") { |n| options[:filename] = n }
      
      opts.on('--use-md5hash', "use md5 hash for filename (overriden by --filename)") { |n| options[:useHashForFilename?] = n }
      opts.on('--include-datestamp', "include date in filename")                  { |n| options[:datestampInFilename?] = n }
      opts.on('--include-timestamp', "include time in filename")                  { |n| options[:timestampInFilename?] = n }
      opts.on('--include-size', "include image size in filename")                 { |n| options[:sizeInFilename?] = n }
      opts.on('--include-format', "include image format in filename")             { |n| options[:snapFormatInFilename?] = n }

      opts.separator ' '
      opts.on('-d', '--output-dir [DIRNAME]', "directory to place images into (default: #{options[:outputDirectory]})") { |n| options[:outputDirectory] = n }

      opts.separator ' '
      opts.separator 'Common Options:'
      opts.on('-v', "--[no-]verbose", "Run verbosely")  { |n| options[:verbose?] = n }
      opts.on_tail("-h", "--help", "Show this message") do
        puts opts.help
        exit
      end

      opts.on_tail("--version", "Show version") do
        puts opts.ver
        exit
      end   
    end

    urls = opts.permute!(args)

    raise OptionParser::MissingArgument.new('you need to supply at least one URL')                           if urls.empty?
    raise OptionParser::InvalidArgument.new('you can only use the filename option if there is only one URL') if (urls.size > 1) && !options[:filename].empty?
    raise OptionParser::InvalidArgument.new('scale cannot be zero')                                          if options[:scaleFactor] < 0.0
    # width and height cannot be zero or less than minimum
    # clipwidth and clipheight cannot be zero or less than minimum
    raise OptionParser::AmbiguousArgument.new('you need to allow at least one format')                       if options[:snapFormat].empty?

    return { :urls => urls, :options => options }
  rescue OptionParser::ParseError => e
    puts "#{e.message.capitalize}"
    exit(1)
  end
end

.run(args) ⇒ Object 



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# File 'lib/core/application.rb', line 12

def Application::run(args)
  config = Application.parse(args)
  Camera::snap(config[:urls], config[:options])
end