Class: Perus::Pinger::Screenshot

Inherits:
Command
  • Object
show all
Defined in:
lib/perus/pinger/metrics/screenshot.rb

Instance Attribute Summary

Attributes inherited from Command

#id, #options

Instance Method Summary collapse

Methods inherited from Command

abstract!, abstract?, #darwin?, description, human_name, inherited, #initialize, metric!, metric?, option, options, #shell, subclasses

Constructor Details

This class inherits a constructor from Perus::Pinger::Command

Instance Method Details

#cleanup ⇒ Object 



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# File 'lib/perus/pinger/metrics/screenshot.rb', line 43

def cleanup
    unless @screenshot_file.nil? || @screenshot_file.closed?
        @screenshot_file.close
    end

    File.delete(@original_path)
    File.delete(@thumbnail_path)
end

#run ⇒ Object 



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# File 'lib/perus/pinger/metrics/screenshot.rb', line 11

def run
    if darwin?
        if options.resize[-1] != '%'
            raise 'Non percent resize option unsupported by OS X currently'
        else
            percent = options.resize.to_f / 100
        end

        shell("screencapture -m -t jpg -x #{options.path}")
        width  = shell("sips -g pixelWidth #{options.path}").match(/pixelWidth: (\d+)/)[1]
        height = shell("sips -g pixelHeight #{options.path}").match(/pixelHeight: (\d+)/)[1]

        # sips helpfully prints data to stderr, so it's run with
        # backticks to avoid thowing an exception on success
        `sips -z #{height.to_i * percent} #{width.to_i * percent} #{options.path}`
    else
        shell("export DISPLAY=:0; scrot --silent --thumb #{options.resize.to_i} #{options.path}")
    end

    # scrot produced two files: path.ext and path-thumb.ext
    @original_path = options.path
    name_parts = File.basename(options.path).split('.')
    name_parts[-2] += '-thumb'
    @thumbnail_path = File.join(
        File.dirname(options.path),
        name_parts.join('.')
    )

    @screenshot_file = File.new(@thumbnail_path)
    {screenshot: @screenshot_file}
end