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;;; muse-xml-common.el --- common routines for XML-like publishing styles
;; Copyright (C) 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
;; This file is part of Emacs Muse. It is not part of GNU Emacs.
;; Emacs Muse 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, or (at your
;; option) any later version.
;; Emacs Muse is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with Emacs Muse; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;; Contributors:
;;; Code:
;; Muse XML Publishing - Common Elements
(require 'muse-publish)
(require 'muse-regexps)
(defcustom muse-xml-encoding-map
'((iso-8859-1 . "iso-8859-1")
(iso-2022-jp . "iso-2022-jp")
(utf-8 . "utf-8")
(japanese-iso-8bit . "euc-jp")
(chinese-big5 . "big5")
(mule-utf-8 . "utf-8")
(chinese-iso-8bit . "gb2312")
(chinese-gbk . "gbk"))
"An alist mapping Emacs coding systems to appropriate XML charsets.
Use the base name of the coding system (i.e. without the -unix)."
:type '(alist :key-type coding-system :value-type string)
:group 'muse-xml)
(defun muse-xml-transform-content-type (content-type default)
"Using `muse-xml-encoding-map', try and resolve an Emacs coding
system to an associated XML coding system.
If no match is found, the DEFAULT charset is used instead."
(let ((match (and (fboundp 'coding-system-base)
(assoc (coding-system-base content-type)
(if match
(cdr match)
(defcustom muse-xml-markup-specials
'((?\" . """)
(?\< . "&lt;")
(?\> . "&gt;")
(?\& . "&amp;"))
"A table of characters which must be represented specially."
:type '(alist :key-type character :value-type string)
:group 'muse-xml)
(defcustom muse-xml-markup-specials-url-extra
'((?\" . "&quot;")
(?\< . "&lt;")
(?\> . "&gt;")
(?\& . "&amp;")
(?\ . "%20")
(?\n . "%0D%0A"))
"A table of characters which must be represented specially.
These are extra characters that are escaped within URLs."
:type '(alist :key-type character :value-type string)
:group 'muse-xml)
(defun muse-xml-decide-specials (context)
"Determine the specials to escape, depending on CONTEXT."
(cond ((memq context '(email url image))
((eq context 'url-extra)
(t muse-xml-markup-specials)))
(defun muse-xml-escape-url (str)
"Convert to character entities any non-alphanumeric characters
outside a few punctuation symbols, that risk being misinterpreted
if not escaped."
(when str
(setq str (muse-publish-escape-specials-in-string str 'url-extra))
(let (pos code len ch)
(while (setq pos (string-match (concat "[^-"
str pos))
(setq ch (aref str pos)
code (concat "&#" (int-to-string
(cond ((fboundp 'char-to-ucs)
(char-to-ucs ch))
((fboundp 'char-to-int)
(char-to-int ch))
(t ch)))
len (length code)
str (concat (substring str 0 pos)
(when (< pos (length str))
(substring str (1+ pos) nil)))
pos (+ len pos)))
(defun muse-xml-markup-anchor ()
(unless (get-text-property (match-end 1) 'muse-link)
(let ((text (muse-markup-text 'anchor (match-string 2))))
(skip-chars-forward (concat muse-regexp-blank "\n"))
(when (looking-at (concat "<\\([^" muse-regexp-blank "/>\n]+\\)>"))
(goto-char (match-end 0)))
(muse-insert-markup text)))
(match-string 1)))
(defun muse-xml-sort-table (table)
"Sort the given table structure so that it validates properly."
;; Note that the decision matrix must have a nil diagonal, or else
;; elements with the same type will be reversed with respect to each
;; other.
(let ((decisions '((nil nil nil) ; body < header, body < footer
(t nil t) ; header stays where it is
(t nil nil)))) ; footer < header
(sort table #'(lambda (l r)
(and (integerp (car l)) (integerp (car r))
(nth (1- (car r))
(nth (1- (car l)) decisions)))))))
(defun muse-xml-markup-table (&optional attributes)
"Publish the matched region into a table.
If a string ATTRIBUTES is given, pass it to the markup string begin-table."
(let* ((table-info (muse-publish-table-fields (match-beginning 0)
(match-end 0)))
(row-len (car table-info))
(supports-group (not (string= (muse-markup-text 'begin-table-group
(field-list (muse-xml-sort-table (cdr table-info)))
(when table-info
(let ((beg (point)))
(muse-publish-ensure-block beg))
(muse-insert-markup (muse-markup-text 'begin-table (or attributes "")))
(muse-insert-markup (muse-markup-text 'begin-table-group row-len))
(dolist (fields field-list)
(let* ((type (car fields))
(part (cond ((eq type 'hline) nil)
((= type 1) "tbody")
((= type 2) "thead")
((= type 3) "tfoot")))
(col (cond ((eq type 'hline) nil)
((= type 1) "td")
((= type 2) "th")
((= type 3) "td"))))
(setq fields (cdr fields))
(unless (and part last-part (string= part last-part))
(when last-part
(muse-insert-markup " </" last-part ">\n")
(when (eq type 'hline)
;; horizontal separators are represented by closing
;; the current table group and opening a new one
(muse-insert-markup (muse-markup-text 'end-table-group))
(muse-insert-markup (muse-markup-text 'begin-table-group
(when part
(muse-insert-markup " <" part ">\n"))
(setq last-part part))
(unless (eq type 'hline)
(muse-insert-markup (muse-markup-text 'begin-table-row))
(dolist (field fields)
(muse-insert-markup (muse-markup-text 'begin-table-entry col))
(insert field)
(muse-insert-markup (muse-markup-text 'end-table-entry col)))
(muse-insert-markup (muse-markup-text 'end-table-row)))))
(when last-part
(muse-insert-markup " </" last-part ">\n"))
(muse-insert-markup (muse-markup-text 'end-table-group))
(muse-insert-markup (muse-markup-text 'end-table))
(insert ?\n))))
(defun muse-xml-prepare-buffer ()
(set (make-local-variable 'muse-publish-url-transforms)
(cons 'muse-xml-escape-string muse-publish-url-transforms)))
(provide 'muse-xml-common)
;;; muse-xml-common.el ends here
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