;;; sx-encoding.el --- encoding for stack-mode ;; Copyright (C) 2014 Sean Allred ;; Author: Sean Allred ;; This program is free software; you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published by ;; the Free Software Foundation, either version 3 of the License, or ;; (at your option) any later version. ;; This program is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; You should have received a copy of the GNU General Public License ;; along with this program. If not, see . ;;; Commentary: ;; ;;; Code: (require 'cl-lib) (defcustom sx-encoding-html-entities-plist '(Aacute "Á" aacute "á" Acirc "Â" acirc "â" acute "´" AElig "Æ" aelig "æ" Agrave "À" agrave "à" alefsym "ℵ" Alpha "Α" alpha "α" amp "&" and "∧" ang "∠" apos "'" aring "å" Aring "Å" asymp "≈" atilde "ã" Atilde "Ã" auml "ä" Auml "Ä" bdquo "„" Beta "Β" beta "β" brvbar "¦" bull "•" cap "∩" ccedil "ç" Ccedil "Ç" cedil "¸" cent "¢" Chi "Χ" chi "χ" circ "ˆ" clubs "♣" cong "≅" copy "©" crarr "↵" cup "∪" curren "¤" Dagger "‡" dagger "†" darr "↓" dArr "⇓" deg "°" Delta "Δ" delta "δ" diams "♦" divide "÷" eacute "é" Eacute "É" ecirc "ê" Ecirc "Ê" egrave "è" Egrave "È" empty "∅" emsp " " ensp " " Epsilon "Ε" epsilon "ε" equiv "≡" Eta "Η" eta "η" eth "ð" ETH "Ð" euml "ë" Euml "Ë" euro "€" exist "∃" fnof "ƒ" forall "∀" frac12 "½" frac14 "¼" frac34 "¾" frasl "⁄" Gamma "Γ" gamma "γ" ge "≥" gt ">" harr "↔" hArr "⇔" hearts "♥" hellip "…" iacute "í" Iacute "Í" icirc "î" Icirc "Î" iexcl "¡" igrave "ì" Igrave "Ì" image "ℑ" infin "∞" int "∫" Iota "Ι" iota "ι" iquest "¿" isin "∈" iuml "ï" Iuml "Ï" Kappa "Κ" kappa "κ" Lambda "Λ" lambda "λ" lang "〈" laquo "«" larr "←" lArr "⇐" lceil "⌈" ldquo "“" le "≤" lfloor "⌊" lowast "∗" loz "◊" lrm "" lsaquo "‹" lsquo "‘" lt "<" macr "¯" mdash "—" micro "µ" middot "·" minus "−" Mu "Μ" mu "μ" nabla "∇" nbsp "" ndash "–" ne "≠" ni "∋" not "¬" notin "∉" nsub "⊄" ntilde "ñ" Ntilde "Ñ" Nu "Ν" nu "ν" oacute "ó" Oacute "Ó" ocirc "ô" Ocirc "Ô" OElig "Œ" oelig "œ" ograve "ò" Ograve "Ò" oline "‾" omega "ω" Omega "Ω" Omicron "Ο" omicron "ο" oplus "⊕" or "∨" ordf "ª" ordm "º" oslash "ø" Oslash "Ø" otilde "õ" Otilde "Õ" otimes "⊗" ouml "ö" Ouml "Ö" para "¶" part "∂" permil "‰" perp "⊥" Phi "Φ" phi "φ" Pi "Π" pi "π" piv "ϖ" plusmn "±" pound "£" Prime "″" prime "′" prod "∏" prop "∝" Psi "Ψ" psi "ψ" quot "\"" radic "√" rang "〉" raquo "»" rarr "→" rArr "⇒" rceil "⌉" rdquo "”" real "ℜ" reg "®" rfloor "⌋" Rho "Ρ" rho "ρ" rlm "" rsaquo "›" rsquo "’" sbquo "‚" scaron "š" Scaron "Š" sdot "⋅" sect "§" shy "" Sigma "Σ" sigma "σ" sigmaf "ς" sim "∼" spades "♠" sub "⊂" sube "⊆" sum "∑" sup "⊃" sup1 "¹" sup2 "²" sup3 "³" supe "⊇" szlig "ß" Tau "Τ" tau "τ" there4 "∴" Theta "Θ" theta "θ" thetasym "ϑ" thinsp " " thorn "þ" THORN "Þ" tilde "˜" times "×" trade "™" uacute "ú" Uacute "Ú" uarr "↑" uArr "⇑" ucirc "û" Ucirc "Û" ugrave "ù" Ugrave "Ù" uml "¨" upsih "ϒ" Upsilon "Υ" upsilon "υ" uuml "ü" Uuml "Ü" weierp "℘" Xi "Ξ" xi "ξ" yacute "ý" Yacute "Ý" yen "¥" yuml "ÿ" Yuml "Ÿ" Zeta "Ζ" zeta "ζ" zwj "" zwnj "") "Plist of html entities to replace when displaying question titles and other text." :type '(repeat (choice symbol string)) :group 'sx) (defun sx-encoding-decode-entities (string) (let* ((plist sx-encoding-html-entities-plist) (get-function (lambda (s) (let ((ss (substring s 1 -1))) ;; Handle things like " (or (plist-get plist (intern ss)) ;; Handle things like ' (format "%c" (string-to-number (substring ss 1)))))))) (replace-regexp-in-string "&[^; ]*;" get-function string))) (defun sx-encoding-normalize-line-endings (string) "Normalize the line endings for STRING" (delete ?\r string)) (defun sx-encoding-clean-content (string) "Cleans STRING for display. Applies `sx-encoding-normalize-line-endings' and `sx-encoding-decode-entities'." (sx-encoding-decode-entities (sx-encoding-normalize-line-endings string))) (defun sx-encoding-clean-content-deep (data) "Clean DATA recursively where necessary. See `sx-encoding-clean-content'." (if (consp data) ;; If we're looking at a cons cell, test to see if is a list. If ;; it is, map ourselves over the entire list. If it is not, ;; reconstruct the cons cell using a cleaned cdr. (if (listp (cdr data)) (cl-map #'list #'sx-encoding-clean-content-deep data) (cons (car data) (sx-encoding-clean-content-deep (cdr data)))) ;; If we're looking at an atom, clean and return if we're looking ;; at a string, map if we're looking at a vector, and just return ;; if we aren't looking at either. (cond ((stringp data) (sx-encoding-clean-content data)) ((vectorp data) (cl-map #'vector #'sx-encoding-clean-content-deep data)) (t data)))) (defun sx-encoding-gzipped-p (data) "Checks for magic bytes in DATA. Check if the first two bytes of a string in DATA match magic numbers identifying the gzip file format. See [1] for the file format description. http://www.gzip.org/zlib/rfc-gzip.html http://emacs.stackexchange.com/a/2978" (equal (substring (string-as-unibyte data) 0 2) (unibyte-string 31 139))) (defun sx-encoding-gzipped-buffer-p (filename) "Check if the BUFFER is gzip-compressed. See `gzip-check-magic' for details." (sx-encoding-gzip-check-magic (buffer-string))) (defun sx-encoding-gzipped-file-p (file) "Check if the FILE is gzip-compressed. See `gzip-check-magic' for details." (let ((first-two-bytes (with-temp-buffer (set-buffer-multibyte nil) (insert-file-contents-literally file nil 0 2) (buffer-string)))) (sx-encoding-gzipped-p first-two-bytes))) (provide 'sx-encoding) ;;; sx-encoding.el ends here ;; Local Variables: ;; indent-tabs-mode: nil ;; End: