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https://github.com/TREX-CoE/qmc-lttc.git
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72 lines
2.8 KiB
EmacsLisp
72 lines
2.8 KiB
EmacsLisp
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;; Thanks to Tobias's answer on Emacs Stack Exchange:
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;; https://emacs.stackexchange.com/questions/38437/org-mode-batch-export-missing-syntax-highlighting
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(package-initialize)
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(require 'htmlize)
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(require 'font-lock)
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(require 'subr-x) ;; for `when-let'
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(unless (boundp 'maximal-integer)
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(defconst maximal-integer (lsh -1 -1)
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"Maximal integer value representable natively in emacs lisp."))
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(defun face-spec-default (spec)
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"Get list containing at most the default entry of face SPEC.
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Return nil if SPEC has no default entry."
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(let* ((first (car-safe spec))
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(display (car-safe first)))
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(when (eq display 'default)
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(list (car-safe spec)))))
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(defun face-spec-min-color (display-atts)
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"Get min-color entry of DISPLAY-ATTS pair from face spec."
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(let* ((display (car-safe display-atts)))
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(or (car-safe (cdr (assoc 'min-colors display)))
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maximal-integer)))
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(defun face-spec-highest-color (spec)
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"Search face SPEC for highest color.
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That means the DISPLAY entry of SPEC
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with class 'color and highest min-color value."
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(let ((color-list (cl-remove-if-not
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(lambda (display-atts)
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(when-let ((display (car-safe display-atts))
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(class (and (listp display)
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(assoc 'class display)))
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(background (assoc 'background display)))
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(and (member 'light (cdr background))
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(member 'color (cdr class)))))
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spec)))
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(cl-reduce (lambda (display-atts1 display-atts2)
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(if (> (face-spec-min-color display-atts1)
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(face-spec-min-color display-atts2))
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display-atts1
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display-atts2))
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(cdr color-list)
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:initial-value (car color-list))))
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(defun face-spec-t (spec)
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"Search face SPEC for fall back."
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(cl-find-if (lambda (display-atts)
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(eq (car-safe display-atts) t))
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spec))
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(defun my-face-attribute (face attribute &optional frame inherit)
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"Get FACE ATTRIBUTE from `face-user-default-spec' and not from `face-attribute'."
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(let* ((face-spec (face-user-default-spec face))
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(display-attr (or (face-spec-highest-color face-spec)
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(face-spec-t face-spec)))
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(attr (cdr display-attr))
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(val (or (plist-get attr attribute) (car-safe (cdr (assoc attribute attr))))))
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;; (message "attribute: %S" attribute) ;; for debugging
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(when (and (null (eq attribute :inherit))
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(null val))
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(let ((inherited-face (my-face-attribute face :inherit)))
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(when (and inherited-face
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(null (eq inherited-face 'unspecified)))
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(setq val (my-face-attribute inherited-face attribute)))))
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;; (message "face: %S attribute: %S display-attr: %S, val: %S" face attribute display-attr val) ;; for debugging
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(or val 'unspecified)))
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(advice-add 'face-attribute :override #'my-face-attribute)
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