RailsOnLisp/rol-assets/css.lisp

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• Hash : 160d346b
  Author : Thomas de Grivel
  Date : 2017-06-21T11:12:40
  

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• css.lisp

• ;;
  ;;  RoL-assets  -  Asset pipeline
  ;;
  ;;  Copyright 2012-2015 Thomas de Grivel <thomas@lowh.net>
  ;;
  ;;  Permission to use, copy, modify, and distribute this software for any
  ;;  purpose with or without fee is hereby granted, provided that the above
  ;;  copyright notice and this permission notice appear in all copies.
  ;;
  ;;  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  ;;  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  ;;  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  ;;  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  ;;  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  ;;  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  ;;  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  ;;
  
  ;;  FIXME bug on bare .css files ?
  
  (in-package :RoL-assets)
  
  ;;  CSS
  
  (defclass css-asset (preprocessed-asset) ())
  
  (defmethod asset-ext ((asset css-asset))
    '.css)
  
  (defmethod asset-class-extensions ((class (eql 'css-asset)))
    '(.css))
  
  (defmethod asset-include ((output stream)
                            (context (eql :html))
                            (asset css-asset)
                            &key &allow-other-keys)
    (write-string "<link rel=\"stylesheet\" href=\"" output)
    (write-string (quote-html (asset-url asset)) output)
    (write-string "\" type=\"text/css\" />
  " output)
    (values))
  
  (defmethod include-asset ((asset css-asset)
                            (output stream))
    (format output "@import url('~A');~%" (asset-url asset)))
  
  (defmethod process-asset :around ((asset css-asset) (output stream))
    (with-temporary-file (tmp)
      (call-next-method asset tmp)
      (force-output tmp)
      (file-position tmp 0)
      (regex-lines "\\burl\\s*\\([\"']?asset:([^\"'?#)]*)([^\"')]*)[\"']?\\)"
                   tmp
                   :replace (lambda (match spec rest)
                              (declare (ignore match))
                              (let ((asset (find-asset spec)))
                                #+FIXME
                                (unless (asset-digest asset)
                                  (compile-asset asset (pathname (asset-path asset))))
                                (str "url('" (asset-url asset) rest "')")))
                   :output output)))
  

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