cl-mvc-rest/cl-mvc-rest-asset-pipeline/html.lisp

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• Hash : 3a2b7aff
  Author :
  Date : 2014-06-10T20:15:28
  

  Fix H returning NIL on empty string.

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• html.lisp

• ;;
  ;;  LowH Triangle Assets  -  Asset pipeline
  ;;
  ;;  Copyright 2012 Thomas de Grivel <billitch@gmail.com>
  ;;
  ;;  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.
  ;;
  
  (in-package :lowh.triangle.assets)
  
  (defstruct (entity-table (:constructor make-entity-table (chars entities)))
    chars
    entities)
  
  (defvar *html-entities*
    (make-entity-table "&<>\"'"
  		     (the (simple-array simple-base-string)
  		       #("&amp;" "&lt;" "&gt;" "&quot;" "&apos;"))))
  
  (defun char-entity (char &optional (table *html-entities*))
    (with-slots (chars entities) table
      (let ((i (position char chars)))
        (when i
  	(svref entities i)))))
  
  (defun quote-html (string &key stream (start 0) (end (length string)))
    (declare (optimize (safety 0) (debug 0) (speed 3))
  	   (type fixnum start end)
  	   (type string string))
    (if (emptyp string)
        ""
        (labels ((print-raw (raw i)
  		 (declare (type fixnum raw i))
  		 (when (< raw i)
  		   (write-string string stream :start raw :end i)))
  	       (chr (i)
  		 (typecase string
  		   (simple-array  (char string i))
  		   (simple-string (char string i))
  		   (string        (char string i))))
  	       (skip (raw i)
  		 (declare (type fixnum raw i))
  		 (cond ((= i end) (print-raw raw i))
  		       (t (let* ((char (chr i))
  				 (entity (char-entity char)))
  			    (cond (entity (print-raw raw i)
  					  (write-string entity stream)
  					  (incf i)
  					  (skip i i))
  				  (t (skip raw (1+ i))))))))
  	       (stream-or-string (i)
  		 (declare (type fixnum i))
  		 (cond ((= i end) (if (and (= 0 start)
  					   (= end (length string)))
  				      string
  				      (subseq string start end)))
  		       (t (let* ((char (chr i))
  				 (entity (char-entity char)))
  			    (cond (entity (with-output-to-string (out)
  					    (setq stream out)
  					    (print-raw start i)
  					    (write-string entity stream)
  					    (incf i)
  					    (skip i i)))
  				  (t (stream-or-string (1+ i)))))))))
  	(if stream
  	    (skip start start)
  	    (stream-or-string start)))))
  
  (define-compiler-macro quote-html (&whole whole string &key stream
  					  (start 0)
  					  (end nil end-p))
    (if (and (null stream)
  	   (stringp string)
  	   (or (not end-p)
  	       (integerp end)))
        (quote-html string
  		  :start start
  		  :end (if end-p end (length string)))
        whole))
  

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