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|
(in-package #:cl-markdown)
#|
extensions should have a unique name and a priority (as should the built-ins)
|#
;;?? only add once
(defun add-extension (extension &key (filter (constantly t)))
(iterate-key-value
*spanner-parsing-environments*
(lambda (key value)
(when (funcall filter key)
(insert-new-item value extension)))))
#|
(markdown "Hello {user-name :format :long}, how are you. Go {{here}}." :format :none)
==> '("Hello "
(EVAL "user-name :format :long")
", how are you. Go "
(MARKDOWN::WIKI-LINK "here")
". ")
(let ((*render-active-functions*
(append '(today now) *render-active-functions*)))
(markdown "Today is {today}. It is {now}."
:format :html :stream t))
|#
(define-parse-tree-synonym
wiki-link (:sequence
#\{ #\{
(:register (:greedy-repetition 0 nil (:inverted-char-class #\})))
#\} #\}))
(define-parse-tree-synonym
eval (:sequence
#\{
(:register (:greedy-repetition 0 nil (:inverted-char-class #\})))
#\}))
(define-parse-tree-synonym
eval-in-code (:sequence
#\{ #\{
(:register (:greedy-repetition 0 nil (:inverted-char-class #\})))
#\} #\}))
;; should only happen once! (but need names to do this correctly)
(eval-when (:load-toplevel :execute)
#+(or)
(add-extension (list (create-scanner '(:sequence wiki-link)) 'wiki-link)
:filter (lambda (key) (not (equal key '(code)))))
(add-extension
(make-markdown-scanner
:regex (create-scanner '(:sequence eval))
:name 'eval
:priority 1.5)
:filter
(lambda (key) (not (equal key '(code)))))
(add-extension
(make-markdown-scanner
:regex (create-scanner '(:sequence eval-in-code))
:name 'code-eval
:priority 1.5)
:filter
(lambda (key) (equal key '(code)))))
(defmethod render-span-to-html ((code (eql 'eval)) body encoding-method)
(declare (ignore encoding-method))
(render-handle-eval body))
(defmethod render-span-to-html ((code (eql 'code-eval)) body encoding-method)
(declare (ignore encoding-method))
(render-handle-eval body))
(defun render-handle-eval (body)
;;?? parse out commands and arguments (deal with quoting, etc)
(bind (((command arguments result nil #+(or) processed?) body)
(result
(cond ((and (member command *render-active-functions*)
(fboundp command))
(funcall command :render arguments (ensure-list result)))
((and (member command *render-active-functions*)
(not (fboundp command)))
(warn "Undefined CL-Markdown function ~s" command))
(t
nil))))
(when result
(output-html (list result))
(setf *magic-space-p* nil)
(setf *magic-line-p* -1))))
(defun canonize-command (command)
(intern (symbol-name command)
(load-time-value (find-package :cl-markdown-user))))
(defmethod process-span ((name (eql 'eval)) registers)
;; the one register contains the command and the buffer index.
(bind (((command &rest args)
(%pull-arguments-from-string (first registers)))
(buffer-index (and args (fixnump (first args)) (first args))))
(process-handle-eval
command
(or (and buffer-index
(%pull-arguments-from-string
(item-at (bracket-references *current-document*)
buffer-index)))
args))))
(defmethod process-span ((name (eql 'code-eval)) registers)
;;; the one register contains the command and all its arguments as one
;; big string we tokenize it and make sure the command exists and, if
;; it is 'active' during parsing, we call it for effect.
(bind (((command &rest arguments)
(%pull-arguments-from-string (first registers))))
(process-handle-eval command arguments)))
(defun process-handle-eval (command arguments)
(bind ((command (canonize-command command))
((:values result processed?)
(when (member command *parse-active-functions*)
(if (fboundp command)
(values (funcall command :parse arguments nil) t)
(warn "Undefined CL-Markdown parse active function ~s"
command)))))
#+(or)
(format t "~&~s: ~s ~a ~a"
command (symbol-package command) (fboundp command)
(member command *parse-active-functions*) result)
`(,command ,arguments ,result ,processed?)))
(defmethod process-span-in-span-p ((span-1 t) (span-2 (eql 'eval)))
(values nil))
(defmethod process-span-in-span-p ((span-1 t) (span-2 (eql 'code-eval)))
(values nil))
(defun %pull-arguments-from-string (string)
(let ((start 0)
(done (load-time-value (list :eof)))
(result nil))
(loop collect
(multiple-value-bind (value new-start)
(ignore-errors (read-from-string string nil done :start start))
(when (eq value done)
(return))
(cond ((and new-start (numberp new-start))
(setf start new-start)
(push value result))
(t
(incf start)))))
(nreverse result)))
;;;;;
#| Another extension mechanism
|#
(defmethod generate-link-output-for-kind
((kind (eql :glossary)) (link-info extended-link-info) text)
(let ((text (if (consp text) (first text) text)))
(format *output-stream*
"<a href='#~a' title='glossary entry for ~a' class='glossary-link'>~a</a>"
(id link-info)
text
text)))
(defextension (glossary)
(when (eq phase :render)
(format *output-stream* "~&<div class=\"glossary\">")
(format *output-stream* "~&<dl>")
(iterate-key-value
(link-info *current-document*)
(lambda (key link)
(when (and (typep link 'extended-link-info)
(eq (kind link) :glossary))
(format *output-stream* "~&<dt id=\"~a\">~a<dt><dd>" key (id link))
(markdown (contents link)
:stream *output-stream*
:format *current-format*
:properties '((:html . nil)
(:omit-final-paragraph . t)
(:omit-initial-paragraph . t))
:document-class 'included-document)
(format *output-stream* "</dd>"))))
(format *output-stream* "</dl>~%</div>~%")))
;;; sort of works
;; can't use html in title
(defmethod generate-link-output-for-kind
((kind (eql :abbreviation)) (link-info extended-link-info) text)
(let ((output (nth-value 1 (markdown (contents link-info)
:stream nil
:document-class 'included-document))))
(format *output-stream* "<a title='~a' class='abbreviation'>~a</a>"
output
text)))
|
