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entities.lisp
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entities.lisp
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(in-package #:org.shirakumo.plump.dom)
(eval-when (:compile-toplevel :load-toplevel :execute)
(case char-code-limit
(#x10000 (pushnew :plump-utf-16 *features*))
(#x110000 (pushnew :plump-utf-32 *features*))))
;; According to http://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references
(defparameter *entity-map*
(loop with table = (make-hash-table :test 'equal)
for (key . val) in (append
'(("quot" . #\")
("amp" . #\&)
("apos" . #\')
("lt" . #\<)
("gt" . #\>)
("nbsp" . #\ ))
#+(or plump-utf-16 plump-utf-32)
'(("iexcl" . #\¡)
("cent" . #\¢)
("pound" . #\£)
("curren" . #\¤)
("yen" . #\¥)
("brvbar" . #\¦)
("sect" . #\§)
("uml" . #\¨)
("copy" . #\©)
("ordf" . #\ª)
("laquo" . #\«)
("not" . #\¬)
("shy" . #\ )
("reg" . #\®)
("macr" . #\¯)
("deg" . #\°)
("plusmn" . #\±)
("sup2" . #\²)
("sup3" . #\³)
("acute" . #\´)
("micro" . #\µ)
("para" . #\¶)
("middot" . #\·)
("cedil" . #\¸)
("sup1" . #\¹)
("ordm" . #\º)
("raquo" . #\»)
("frac14" . #\¼)
("frac12" . #\½)
("frac34" . #\¾)
("iquest" . #\¿)
("Agrave" . #\À)
("Aacute" . #\Á)
("Acirc" . #\Â)
("Atilde" . #\Ã)
("Auml" . #\Ä)
("Aring" . #\Å)
("AElig" . #\Æ)
("Ccedil" . #\Ç)
("Egrave" . #\È)
("Eacute" . #\É)
("Ecirc" . #\Ê)
("Euml" . #\Ë)
("Igrave" . #\Ì)
("Iacute" . #\Í)
("Icirc" . #\Î)
("Iuml" . #\Ï)
("ETH" . #\Ð)
("Ntilde" . #\Ñ)
("Ograve" . #\Ò)
("Oacute" . #\Ó)
("Ocirc" . #\Ô)
("Otilde" . #\Õ)
("Ouml" . #\Ö)
("times" . #\×)
("Oslash" . #\Ø)
("Ugrave" . #\Ù)
("Uacute" . #\Ú)
("Ucirc" . #\Û)
("Uuml" . #\Ü)
("Yacute" . #\Ý)
("THORN" . #\Þ)
("szlig" . #\ß)
("agrave" . #\à)
("aacute" . #\á)
("acirc" . #\â)
("atilde" . #\ã)
("auml" . #\ä)
("aring" . #\å)
("aelig" . #\æ)
("ccedil" . #\ç)
("egrave" . #\è)
("eacute" . #\é)
("ecirc" . #\ê)
("euml" . #\ë)
("igrave" . #\ì)
("iacute" . #\í)
("icirc" . #\î)
("iuml" . #\ï)
("eth" . #\ð)
("ntilde" . #\ñ)
("ograve" . #\ò)
("oacute" . #\ó)
("ocirc" . #\ô)
("otilde" . #\õ)
("ouml" . #\ö)
("divide" . #\÷)
("oslash" . #\ø)
("ugrave" . #\ù)
("uacute" . #\ú)
("ucirc" . #\û)
("uuml" . #\ü)
("yacute" . #\ý)
("thorn" . #\þ)
("yuml" . #\ÿ)
("OElig" . #\Œ)
("oelig" . #\œ)
("Scaron" . #\Š)
("scaron" . #\š)
("Yuml" . #\Ÿ)
("fnof" . #\ƒ)
("circ" . #\ˆ)
("tilde" . #\˜)
("Alpha" . #\Α)
("Beta" . #\Β)
("Gamma" . #\Γ)
("Delta" . #\Δ)
("Epsilon" . #\Ε)
("Zeta" . #\Ζ)
("Eta" . #\Η)
("Theta" . #\Θ)
("Iota" . #\Ι)
("Kappa" . #\Κ)
("Lambda" . #\Λ)
("Mu" . #\Μ)
("Nu" . #\Ν)
("Xi" . #\Ξ)
("Omicron" . #\Ο)
("Pi" . #\Π)
("Rho" . #\Ρ)
("Sigma" . #\Σ)
("Tau" . #\Τ)
("Upsilon" . #\Υ)
("Phi" . #\Φ)
("Chi" . #\Χ)
("Psi" . #\Ψ)
("Omega" . #\Ω)
("alpha" . #\α)
("beta" . #\β)
("gamma" . #\γ)
("delta" . #\δ)
("epsilon" . #\ε)
("zeta" . #\ζ)
("eta" . #\η)
("theta" . #\θ)
("iota" . #\ι)
("kappa" . #\κ)
("lambda" . #\λ)
("mu" . #\μ)
("nu" . #\ν)
("xi" . #\ξ)
("omicron" . #\ο)
("pi" . #\π)
("rho" . #\ρ)
("sigmaf" . #\ς)
("sigma" . #\σ)
("tau" . #\τ)
("upsilon" . #\υ)
("phi" . #\φ)
("chi" . #\χ)
("psi" . #\ψ)
("omega" . #\ω)
("thetasym" . #\ϑ)
("upsih" . #\ϒ)
("piv" . #\ϖ)
("ensp" . #\ )
("emsp" . #\ )
("thinsp" . #\ )
("zwnj" . #\ )
("zwj" . #\ )
("lrm" . #\ )
("rlm" . #\ )
("ndash" . #\–)
("mdash" . #\—)
("lsquo" . #\‘)
("rsquo" . #\’)
("sbquo" . #\‚)
("ldquo" . #\“)
("rdquo" . #\”)
("bdquo" . #\„)
("dagger" . #\†)
("Dagger" . #\‡)
("bull" . #\•)
("hellip" . #\…)
("permil" . #\‰)
("prime" . #\′)
("Prime" . #\″)
("lsaquo" . #\‹)
("rsaquo" . #\›)
("oline" . #\‾)
("frasl" . #\⁄)
("euro" . #\€)
("image" . #\ℑ)
("weierp" . #\℘)
("real" . #\ℜ)
("trade" . #\™)
("alefsym" . #\ℵ)
("larr" . #\←)
("uarr" . #\↑)
("rarr" . #\→)
("darr" . #\↓)
("harr" . #\↔)
("crarr" . #\↵)
("lArr" . #\⇐)
("uArr" . #\⇑)
("rArr" . #\⇒)
("dArr" . #\⇓)
("hArr" . #\⇔)
("forall" . #\∀)
("part" . #\∂)
("exist" . #\∃)
("empty" . #\∅)
("nabla" . #\∇)
("isin" . #\∈)
("notin" . #\∉)
("ni" . #\∋)
("prod" . #\∏)
("sum" . #\∑)
("minus" . #\−)
("lowast" . #\∗)
("radic" . #\√)
("prop" . #\∝)
("infin" . #\∞)
("ang" . #\∠)
("and" . #\∧)
("or" . #\∨)
("cap" . #\∩)
("cup" . #\∪)
("int" . #\∫)
("there4" . #\∴)
("sim" . #\∼)
("cong" . #\≅)
("asymp" . #\≈)
("ne" . #\≠)
("equiv" . #\≡)
("le" . #\≤)
("ge" . #\≥)
("sub" . #\⊂)
("sup" . #\⊃)
("nsub" . #\⊄)
("sube" . #\⊆)
("supe" . #\⊇)
("oplus" . #\⊕)
("otimes" . #\⊗)
("perp" . #\⊥)
("sdot" . #\⋅)
("vellip" . #\⋮)
("lceil" . #\⌈)
("rceil" . #\⌉)
("lfloor" . #\⌊)
("rfloor" . #\⌋)
("lang" . #\〈)
("rang" . #\〉)
("loz" . #\◊)
("spades" . #\♠)
("clubs" . #\♣)
("hearts" . #\♥)
("diams" . #\♦)))
do (setf (gethash key table) val)
finally (return table)))
(declaim (type hash-table *entity-map*))
(defun translate-entity (text &key (start 0) (end (length text)))
(declare (optimize (speed 3)))
(declare (type simple-string text)
(type fixnum start end))
(if (char= (elt text start) #\#)
(when (<= 2 (- end start))
(code-char
(if (char= (elt text (+ start 1)) #\x)
(parse-integer text :start (+ start 2) :end end :radix 16)
(parse-integer text :start (+ start 1) :end end))))
(gethash (subseq text start end) *entity-map*)))
(eval-when (:compile-toplevel :load-toplevel :execute)
(defparameter *alpha-chars* (coerce "0123456789#abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ" 'list))
(declaim (type list *alpha-chars*)))
(defun decode-entities (text &optional remove-invalid)
(declare (optimize (speed 3))
(type simple-string text)
(type boolean remove-invalid))
(with-output-to-string (output)
(loop with start = 0
for i from 0 below (length text)
do (when (char= (aref text i) #\&)
(write-string text output :start start :end i)
(setf start i)
(loop for i from (1+ i) below (length text)
do (case (aref text i)
(#.*alpha-chars*
T)
(#\;
(let ((entity (translate-entity text :start (+ start 1) :end i)))
(cond
(entity (write-char entity output))
(remove-invalid NIL)
(T (write-string text output :start start :end (1+ i)))))
(setf start (1+ i) i (1+ i))
(return))
(T ; Invalid char, not an entity.
(return)))))
finally (write-string text output :start start))))
(defun allowed-char-p (char)
(declare (optimize speed))
(let ((c (char-code char)))
(declare (type fixnum c))
(or (= c #x9)
(= c #xA)
(= c #xD)
(<= #x20 c #xD7FF)
(<= #xE000 c #xFFFD)
#+plump-utf-32 (<= #x10000 c #x10FFFF))))
(defun discouraged-char-p (char)
(declare (optimize speed))
(let ((c (char-code char)))
(declare (type fixnum c))
(or (<= #x7F c #x84)
(<= #x86 c #x9F)
(<= #xFDD0 c #xFDEF)
#+plump-utf-32
(or
(<= #x1FFFE c #x1FFFF)
(<= #x2FFFE c #x2FFFF)
(<= #x3FFFE c #x3FFFF)
(<= #x4FFFE c #x4FFFF)
(<= #x5FFFE c #x5FFFF)
(<= #x6FFFE c #x6FFFF)
(<= #x7FFFE c #x7FFFF)
(<= #x8FFFE c #x8FFFF)
(<= #x9FFFE c #x9FFFF)
(<= #xAFFFE c #xAFFFF)
(<= #xBFFFE c #xBFFFF)
(<= #xCFFFE c #xCFFFF)
(<= #xDFFFE c #xDFFFF)
(<= #xEFFFE c #xEFFFF)
(<= #xFFFFE c #xFFFFF)
(<= #x10FFFE c #x10FFFF)))))
(define-condition invalid-xml-character (error)
((faulty-char :initarg :faulty-char :accessor faulty-char))
(:report (lambda (e s) (format s "Outputting ~s is disallowed, as U+~v,'0x is not within the range of valid XML characters."
(faulty-char e) #+plump-utf-32 6 #-plump-utf-32 4 (char-code (faulty-char e))))))
(define-condition discouraged-xml-character (warning)
((faulty-char :initarg :faulty-char :accessor faulty-char))
(:report (lambda (e s) (format s "Outputting ~s is discouraged, as U+~v,'0x is within the range of discouraged XML characters. Not all parsers may recognise it or handle it correctly."
(faulty-char e) #+plump-utf-32 6 #-plump-utf-32 4 (char-code (faulty-char e))))))
(setf (documentation 'faulty-char 'function)
"Returns the faulty char that caused the signal.")
(defun write-encode-char (char stream &optional encode-whitespace)
(declare (optimize speed))
(case char
(#\< (write-string "<" stream))
(#\> (write-string ">" stream))
(#\" (write-string """ stream))
(#\& (write-string "&" stream))
(#\Tab
(if encode-whitespace
(write-string "	" stream)
(write-char char stream)))
(#\Return
(if encode-whitespace
(write-string "
" stream)
(write-char char stream)))
(#\Linefeed
(if encode-whitespace
(write-string "
" stream)
(write-char char stream)))
(t
(restart-case
(progn
(unless (allowed-char-p char)
(error 'invalid-xml-character :faulty-char char))
(when (discouraged-char-p char)
(warn 'discouraged-xml-character :faulty-char char))
(write-char char stream))
(abort ()
:report "Do not output the faulty character.")
(use-new-character (new-char)
:report "Output a replacement character instead."
:interactive (lambda ()
(write-string "Enter replacement character: " *query-io*)
(list (read-char *query-io*)))
(write-char new-char stream))
(continue ()
:report "Continue and output the faulty character anyway."
(write-char char stream))))))
(declaim (inline %encode-entities))
(defun %encode-entities (text output &optional encode-whitespace)
(declare (optimize speed)
(type simple-string text)
(type stream output))
(loop for c across text
do (write-encode-char c output encode-whitespace)))
(defun encode-entities (text &optional stream)
(declare (optimize speed)
(type simple-string text))
(flet ((encode-to (output)
(loop for c across text
do (write-encode-char c output))))
(if stream
(encode-to stream)
(with-output-to-string (stream)
(encode-to stream)))))