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(in-package #:cl-markdown)
(defstruct (html-markup
(:conc-name markup-)
(:print-object print-html-markup))
name outer inner tag encoding-method contentlessp (nestsp t))
(defmethod print-html-markup (markup stream)
(print-unreadable-object (markup stream :type nil :identity t)
(bind (((:struct markup- name inner outer encoding-method) markup))
(format stream "~a : ~a ~a ~a"
name outer inner encoding-method))))
(defparameter *markup->html*
(make-container
'simple-associative-container
:test #'equal
:initial-contents
(loop for datum in '((header1 nil nil "h1")
(header2 nil nil "h2")
(header3 nil nil "h3")
(header4 nil nil "h4")
(header5 nil nil "h5")
(header6 nil nil "h6")
(definition-term ("dl") ("dt") nil :nestsp nil)
(definition-description nil ("dd") nil :nestsp t)
(bullet ("ul") ("li") nil :nestsp t)
(code ("pre" "code") nil nil :new-method encode-pre)
(number ("ol") ("li") nil :nestsp nil)
(quote ("blockquote") nil nil)
(anchor nil nil "a")
(horizontal-rule nil nil "hr" :contentlessp t)) nconc
(bind (((tag outer inner markup &key
new-method
contentlessp (nestsp t))
datum))
(list (list tag)
(make-html-markup
:name tag
:outer outer
:inner inner
:tag markup
:encoding-method new-method
:contentlessp contentlessp
:nestsp nestsp))))))
(defvar *magic-space-p* nil)
(defvar *magic-line-p* 0)
(defparameter *magic-space* #\Space)
(defparameter *separate-lines* nil)
(defparameter *magic-line* nil)
#+(or)
(setf *magic-space* #\| *magic-line* #\~)
(defgeneric render-to-html (stuff encoding-method)
(:documentation ""))
(defmethod render ((document abstract-document) (style (eql :html)) stream)
(declare (ignore stream))
(setf *magic-space-p* nil
*magic-line-p* 0)
(render-to-html document nil))
(defun html-block-markup (chunk)
(aand+
(markup-class-for-html chunk)
(markup-outer it)))
(defun html-inner-block-markup (chunk)
(aand
(markup-class-for-html chunk)
(markup-inner it)))
(defmethod render-to-html ((chunk chunk) encoding-method)
(let ((*current-chunk* chunk))
(bind (((:struct markup- (markup tag)
(new-method encoding-method) contentlessp)
(markup-class-for-html chunk))
(paragraph? (paragraph? chunk)))
(cond (contentlessp
(format *output-stream* "<~a/>" markup))
(t
(encode-html chunk (or new-method encoding-method)
markup (when paragraph? "p")))))))
;;?? same code as below
(defmethod encode-html ((stuff chunk) encoding-method &rest codes)
(declare (dynamic-extent codes))
(setf *magic-line-p* 0)
(let ((*separate-lines* (null (process? stuff))))
(cond ((null codes)
#+(or)
(when (and *separate-lines* (blank-line-before? stuff))
(terpri *output-stream*))
(let ((code-p (member 'code (markup-class stuff))))
(iterate-elements
(lines stuff)
(lambda (line)
(render-to-html line encoding-method)
(when *separate-lines*
(fresh-line *output-stream*))
(when code-p (incf *magic-line-p*)))))
(when (and *separate-lines* (blank-line-after? stuff))
(terpri *output-stream*)))
((null (first codes))
(apply #'encode-html stuff encoding-method (rest codes)))
(t (format *output-stream* "<~a>" (first codes))
(apply #'encode-html stuff encoding-method (rest codes))
(format *output-stream* "</~a>" (first codes))))))
;;?? same code as above
(defmethod encode-html ((stuff list) encoding-method &rest codes)
(declare (dynamic-extent codes))
(cond ((null codes)
(iterate-elements
stuff
(lambda (line)
(render-to-html line encoding-method)
(when *separate-lines*
(fresh-line *output-stream*)))))
((null (first codes))
(apply #'encode-html stuff encoding-method (rest codes)))
(t (format *output-stream* "<~A>" (first codes))
(apply #'encode-html stuff encoding-method (rest codes))
(format *output-stream* "</~A>" (first codes)))))
(defmethod markup-class-for-html ((chunk chunk))
(if (markup-class chunk)
(let ((translation (item-at-1 *markup->html* (markup-class chunk))))
(unless translation
(markdown-warning "No translation for markup class '~A'"
(markup-class chunk)))
translation)
(load-time-value (make-html-markup))))
(defmethod render-to-html ((chunk list) encoding-method)
(render-span-to-html (first chunk) (rest chunk) encoding-method))
(defmethod render-to-html ((line string) encoding-method)
(when *magic-space-p*
(setf *magic-space-p* nil)
(princ *magic-space* *output-stream*))
(when (> *magic-line-p* 0)
(when *magic-line*
(princ *magic-line* *output-stream*))
(terpri *output-stream*))
(format *output-stream* "~a"
(funcall (or encoding-method 'encode-string-for-html) line))
(setf *magic-space-p* t))
(defun output-html (string &rest codes)
(declare (dynamic-extent codes))
(cond ((null codes) (princ (first string) *output-stream*))
(t (format *output-stream* "<~(~a~)>" (first codes))
(apply #'output-html string (rest codes))
(format *output-stream* "</~(~a~)>" (first codes)))))
(defmethod render-span-to-html ((code (eql 'strong)) body encoding-method)
(declare (ignore encoding-method))
(output-html body 'strong)
(setf *magic-space-p* nil))
(defmethod render-span-to-html ((code (eql 'mail)) body encoding-method)
(declare (ignore encoding-method))
(let ((address (first body)))
(output-link (format nil "mailto:~A" address) nil address)))
(defmethod render-span-to-html ((code (eql 'emphasis)) body encoding-method)
(declare (ignore encoding-method))
(output-html body 'em)
(setf *magic-space-p* nil))
(defmethod render-span-to-html ((code (eql 'strong-em)) body encoding-method)
(declare (ignore encoding-method))
(output-html body 'strong 'em)
(setf *magic-space-p* nil))
(defmethod render-span-to-html
((code (eql 'escaped-character)) body encoding-method)
(declare (ignore encoding-method))
(let ((char (aref (first body) 0)))
(cond ((char= #\< char) (princ "&lt;" *output-stream*))
((char= #\> char) (princ "&gt;" *output-stream*))
(t (output-html body))))
(setf *magic-space-p* nil))
(defmethod render-span-to-html ((code (eql 'code)) body encoding-method)
(declare (ignore encoding-method))
(format *output-stream* "<code>")
(setf *magic-space-p* nil)
(dolist (bit body)
(render-to-html bit 'encode-pre))
(format *output-stream* "</code>")
(setf *magic-space-p* nil))
(defmethod render-span-to-html ((code (eql 'entity)) body encoding-method)
(declare (ignore encoding-method))
(setf *magic-space-p* nil
*magic-line-p* -1)
(output-html body)
(setf *magic-space-p* nil
*magic-line-p* -1))
(defmethod render-span-to-html
((code (eql 'reference-link)) body encoding-method)
(declare (ignore encoding-method))
(bind (((:values text id nil)
(if (length-1-list-p body)
(values (first body) (first body) nil)
(values (butlast body 1) (first (last body)) t)))
(link-info (find-link id)))
(cond ((not (null link-info))
;; it _was_ a valid ID
(generate-link-output link-info text))
(t
(markdown-warning "No reference found for link ~s" id)
(format *output-stream* "~a" (if (consp text) (first text) text))
(setf *magic-space-p* nil)))))
(defmethod generate-link-output ((link-info link-info) text)
(output-link (url link-info) (title link-info) text (properties link-info)))
(defmethod generate-link-output ((link-info extended-link-info) text)
;; you didn't really want it to be fast did you...?
(generate-link-output-for-kind (kind link-info) link-info text))
(defmethod render-span-to-html
((code (eql 'inline-link)) body encoding-method)
(declare (ignore encoding-method))
(bind (((text &optional (url "") title) body))
(output-link url title (list text))))
(defmethod render-span-to-html ((code (eql 'link)) body encoding-method)
(declare (ignore encoding-method))
(let ((link (first body)))
(output-link link nil link)))
(defmethod render-span-to-html
((code (eql 'reference-image)) body encoding-method)
(declare (ignore encoding-method))
(bind (((:values text id nil)
(if (length-1-list-p body)
(values (first body) (first body) nil)
(values (butlast body 1) (first (last body)) t)))
(link-info (find-link id)))
(cond ((not (null link-info))
;; it _was_ a valid ID
(output-image (url link-info) (title link-info) text
(properties link-info)))
(t
;;?? hackish
(markdown-warning "No reference found for image link ~s" id)
(format *output-stream* "~a (image)"
(if (consp text) (first text) text))
(setf *magic-space-p* nil)))))
(defmethod render-span-to-html
((code (eql 'inline-image)) body encoding-method)
(declare (ignore encoding-method))
(bind (((text &optional (url "") title) body))
(output-image url title text)))
(defmethod render-span-to-html
((code (eql 'simple-anchor)) body encoding-method)
(declare (ignore encoding-method))
(format *output-stream* "<a name=\"~A\"></a>" (first body)))
(defmethod render-span-to-html
((code (eql 'anchor-with-text)) body encoding-method)
(declare (ignore encoding-method))
(bind (((text name) body))
(format *output-stream* "<a name=\"~A\">~a</a>" name text)))
(defun output-link (url title text &optional properties)
(cond ((not (null url))
(format *output-stream* "<a href=\"~A\"~@[ title=\"~A\"~]"
url title)
(loop for (key . value) in properties do
(format *output-stream* " ~a=\"~a\"" key value))
(write-string ">" *output-stream*)
(setf *magic-space-p* nil)
(encode-html (ensure-list text) nil)
(format *output-stream* "</a>")
(setf *magic-space-p* nil))
(t
)))
(defun output-image (url title text &optional properties)
(cond ((not (null url))
(format *output-stream*
"<img src=\"~A\"~@[ title=\"~A\"~]~@[ alt=\"~A\"~]"
url title (first (ensure-list text)))
(loop for (key . value) in properties do
(format *output-stream* " ~a=\"~a\"" key value))
(write-string "></img>" *output-stream*)
(setf *magic-space-p* nil))
(t
)))
(defmethod render-span-to-html ((code (eql 'html)) body encoding-method)
;; hack!
(let ((output (first body)))
(etypecase output
(string
(output-html (list output #+(or) (encode-pre output))))
(list
(render-span-to-html (first output) (rest output) encoding-method)))))
;; Special cases R us.
(defmethod render-span-to-html ((code (eql 'break)) body encoding-method)
(encode-html body encoding-method)
(format *output-stream* "<br />~%"))
(defun stream-out-markup (markup reverse)
(dolist (marker (if reverse (reverse markup) markup))
(let ((cr? (member marker
*block-level-html-tags* :test 'string=)))
(when (and (not reverse) cr?)
(terpri *output-stream*))
(format *output-stream* "<~a~a>"
(if reverse "/" "") marker))))
;; FIXME - in case you're wondering, this is an ugly bit of code
(defmethod render-to-html ((document abstract-document) encoding-method)
(bind ((current-chunk nil)
(wrap-in-html (add-html-header-p document)))
(labels ((render-block (block level markup inner?)
; (print (list :rb level inner? (first block)))
(setf *magic-space-p* nil)
(let ((add-markup? (not (eq (first block) current-chunk)))
(real-markup
(if (and (not inner?) (length-1-list-p block))
(append
markup (html-inner-block-markup (first block)))
markup)))
(when add-markup?
(stream-out-markup real-markup nil))
(cond ((or (length-1-list-p block)
)
(render-to-html (first block) encoding-method))
((not add-markup?)
(render-to-html (first block) encoding-method)
(do-it (rest block) level))
(t
(setf current-chunk (and inner? (first block)))
(do-it block level)))
(when add-markup?
(stream-out-markup real-markup t))))
(do-it (chunks level)
; (print (list :di level (first chunks)))
(loop for rest = chunks then (rest rest)
for chunk = (first rest) then (first rest)
while chunk
for new-level = (level chunk)
when (= level new-level) do
(let ((index (inner-block rest))
(inner-markup (html-inner-block-markup chunk)))
(render-block (subseq rest 0 index)
level inner-markup t)
(setf rest (nthcdr (1- index) rest)))
when (< level new-level) do
(multiple-value-bind (block remaining method)
(next-block rest new-level)
(declare (ignore method))
(render-block
block new-level (html-block-markup chunk) nil)
(setf rest remaining)))))
(when wrap-in-html
(generate-html-header))
(do-it (collect-elements (chunks document)) (level document))
(when wrap-in-html
(format *output-stream* "~&</body>~&</html>~%")))))
(defmethod add-html-header-p ((document abstract-document))
(values nil))
(defmethod add-html-header-p ((document document))
(document-property :html))
(defun inner-block (chunks)
(bind ((level (level (first chunks)))
(markup-class (markup-class (first chunks)))
(nestsp (aand+ (markup-class-for-html (first chunks))
(markup-nestsp it))))
(or
;; if we go down a level immediately after, take whereever we go back up
;; or the end of the document.
;; FIXME - I think we're trying to find the _end_ of the _block_
;; and this would mean keeping track of nesting until we actually
;; come all the way "up" and out. Need a test case for this
(aand+ nestsp
(let ((next-chunk (first (rest chunks))))
(and next-chunk
(or (> (level next-chunk) level)
(and (= (level next-chunk) level)
(not (equal (markup-class next-chunk)
markup-class))))))
#+(or)
(position-if
(lambda (chunk)
(or (> (level chunk) level)
(and (= (level chunk) level)
(not (equal (markup-class chunk) markup-class)))))
(rest chunks))
(aif (position-if
(lambda (chunk)
(<= (level chunk) level))
(rest chunks) :start 1 #+(or) (1+ it))
(1+ it)
(length chunks)))
;; do we go up a level or change markup classes at the same level
(aand+ (position-if
(lambda (chunk)
(or (< (level chunk) level)
(and (= (level chunk) level)
(not (equal (markup-class chunk) markup-class)))))
(rest chunks))
(1+ it))
1)))
(defvar *html-meta*
'((name (author description copyright keywords date))
(http-equiv (refresh expires |Content-Type|))))
;; <META http-equiv="Content-Type" content="text/html; charset=UTF-8">
(defun generate-html-header ()
(generate-doctype)
(format *output-stream* "~&<html xmlns='~a' xml:lang='~a' lang='~a'>"
(document-property :xmlns "http://www.w3.org/1999/xhtml")
(document-property :xmllang "en")
(document-property :lang "en"))
(format *output-stream* "~&<head>")
(when (document-property :header-comment)
(format *output-stream* "~&<!-- ~%~a~% -->~%"
(nth-value
1 (markdown (document-property :header-comment)
:properties '((:omit-initial-paragraph t)
(:omit-final-paragraph t)
(:html . nil))
:format :plain
:stream nil))))
(awhen (document-property "title")
(format *output-stream* "~&<title>~a</title>"
(process-child-markdown it :render :transfer-data nil)))
(let ((styles nil))
(flet ((output-style (it)
(bind (((name &optional media) (ensure-list it)))
(setf name (ensure-string name))
(unless (search ".css" name)
(setf name (concatenate 'string name ".css")))
(unless (member name styles :test 'string-equal)
(push name styles)
(if (document-property :make-style-sheet-inline)
(insert-style-sheet name media)
(format
*output-stream*
"~&<link type='text/css' href='~a' rel='stylesheet' ~@[media='~a' ~]/>"
name media))))))
(awhen (document-property "style-sheet")
(output-style it))
(loop for style in (document-property "style-sheets") do
(output-style style))
;; Rewritten smh 2008-05-03
(loop for (kind properties) in *html-meta* do
(loop for property in properties
as val = (document-property (symbol-name property))
when val
do (format *output-stream* "~&<meta ~a=\"~a\" content=\"~a\"/>"
kind property val)))
(format *output-stream* "~&</head>~&<body~@[ id=\"~a\"~]>"
(document-property :markdown-body-id)))))
(defun generate-doctype ()
(format *output-stream*
"~&<!DOCTYPE html PUBLIC ~s ~s>"
"-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"))
#|
"-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
|#
(defun insert-style-sheet (name media)
(let ((pathname (find-include-file name)))
(when pathname
(format *output-stream* "~&<style type='text/css'~@[ media='~a'~]>~%"
media)
(map-lines (pathname pathname)
(lambda (line)
(format *output-stream* "~& ~a~%" line)))
(format *output-stream* "~&</style>~%"))))
(defun output-anchor (name &optional (stream *output-stream*))
(let ((name (html-safe-name (ensure-string name))))
(format stream
"~&<a name=\"~a\" id=\"~a\"></a>~%"
name name)))
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