e44d0bde9e
In short, an injection is now a FUNCTION that takes a document and returns either a STRING to insert in the page (possibly with data from the document) or NIL.
30 lines
1.1 KiB
Common Lisp
30 lines
1.1 KiB
Common Lisp
(defpackage :coleslaw-mathjax
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(:use :cl)
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(:export #:enable)
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(:import-from :coleslaw #:add-injection
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#:content
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#:index
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#:tag-p
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#:index-content))
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(in-package :coleslaw-mathjax)
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(defvar *mathjax-header* "~@[<script type=\"text/x-mathjax-config\">
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MathJax.Hub.Config({~A});
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</script>~]
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<script type=\"text/javascript\" src=\"~A~@[?config=~A~]\"></script>")
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(defgeneric mathjax-p (document)
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(:documentation "Test if DOCUMENT requires contains any math-tagged content.")
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(:method ((content content))
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(tag-p "math" content))
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(:method ((index index))
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(and (slot-boundp index 'content)
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(some #'mathjax-p (index-content index)))))
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(defun enable (&key force config (preset "TeX-AMS-MML_HTMLorMML")
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(location "http://cdn.mathjax.org/mathjax/latest/MathJax.js"))
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(flet ((inject-p (x)
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(when (or force (mathjax-p x))
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(format nil *mathjax-header* config location preset))))
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(add-injection #'inject-p :head)))
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