old_contents: # -*- coding: utf-8 -*-
  
  from markupsafe import Markup
  
  from lektor.pluginsystem import Plugin
  
  TEMPLATE = (
      '<a rel="license" href="http://creativecommons.org/licenses/' +
      '{type}/{version}/"><img alt="Creative Commons License" ' +
      'style="border-width:0" src="https://i.creativecommons.org/l/' +
      '{type}/{version}/{size}.png" /></a><br />This work is licensed under ' +
      'a <a rel="license" href="http://creativecommons.org/licenses/' +
      '{type}/{version}/">Creative Commons {permissions} {version} ' +
      'International License</a>.'
  )
  
  LICENSES = {
      'by': {
          'type': 'by',
          'version': '4.0',
          'permissions': 'Attribution',
      },
      'by-nc': {
          'type': 'by-nc',
          'version': '4.0',
          'permissions': 'Attribution-NonCommercial',
      },
      'by-sa': {
          'type': 'by-sa',
          'version': '4.0',
          'permissions': 'Attribution-ShareAlike',
      },
      'by-nc-sa': {
          'type': 'by-nc-sa',
          'version': '4.0',
          'permissions': 'Attribution-NonCommercial-ShareAlike',
      },
      'by-nd': {
          'type': 'by-nd',
          'version': '4.0',
          'permissions': 'Attribution-NoDerivatives',
      },
      'by-nc-nd': {
          'type': 'by-nc-nd',
          'version': '4.0',
          'permissions': 'Attribution-NonCommercial-NoDerivatives',
      },
  }
  
  LICENSE_SIZES = {
      'normal': '88x31',
      'compact': '80x15',
  }
  
  
  class CreativeCommonsPlugin(Plugin):
      name = 'Creative Commons'
      description = 'Add Creative Commons license to your pages.'
  
      def render_cc_license(self, type, size='normal'):
          license = LICENSES[type].copy()
          license['size'] = LICENSE_SIZES[size]
  
          return Markup(TEMPLATE.format(**license))
  
      def on_setup_env(self, **extra):
          self.env.jinja_env.globals.update(
              render_cc_license=self.render_cc_license
          )
  
new_contents: # -*- coding: utf-8 -*-
  
  from markupsafe import Markup
  
  from lektor.pluginsystem import Plugin
  
  TEMPLATE = (
      '<a rel="license" target="_blank" href="http://creativecommons.org/' +
      'licenses/{type}/{version}/"><img alt="Creative Commons License" ' +
      'style="border-width:0" src="https://i.creativecommons.org/l/' +
      '{type}/{version}/{size}.png" /></a><br />This work is licensed under ' +
      'a <a rel="license" target="_blank" href="http://creativecommons.org/' +
      'licenses/{type}/{version}/">Creative Commons {permissions} {version} ' +
      'International License</a>.'
  )
  
  LICENSES = {
      'by': {
          'type': 'by',
          'version': '4.0',
          'permissions': 'Attribution',
      },
      'by-nc': {
          'type': 'by-nc',
          'version': '4.0',
          'permissions': 'Attribution-NonCommercial',
      },
      'by-sa': {
          'type': 'by-sa',
          'version': '4.0',
          'permissions': 'Attribution-ShareAlike',
      },
      'by-nc-sa': {
          'type': 'by-nc-sa',
          'version': '4.0',
          'permissions': 'Attribution-NonCommercial-ShareAlike',
      },
      'by-nd': {
          'type': 'by-nd',
          'version': '4.0',
          'permissions': 'Attribution-NoDerivatives',
      },
      'by-nc-nd': {
          'type': 'by-nc-nd',
          'version': '4.0',
          'permissions': 'Attribution-NonCommercial-NoDerivatives',
      },
  }
  
  LICENSE_SIZES = {
      'normal': '88x31',
      'compact': '80x15',
  }
  
  
  class CreativeCommonsPlugin(Plugin):
      name = 'Creative Commons'
      description = 'Add Creative Commons license to your pages.'
  
      def render_cc_license(self, type, size='normal'):
          license = LICENSES[type].copy()
          license['size'] = LICENSE_SIZES[size]
  
          return Markup(TEMPLATE.format(**license))
  
      def on_setup_env(self, **extra):
          self.env.jinja_env.globals.update(
              render_cc_license=self.render_cc_license
          )
  
subject: Add target to a new tab