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|
;;;;; -*-coding: iso-8859-1;-*-
;;;;;
;;;;; Copyright (C) 1991-2002 Lysator Academic Computer Association.
;;;;;
;;;;; This file is part of the LysKOM Emacs LISP client.
;;;;;
;;;;; LysKOM 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 2, or (at your option)
;;;;; any later version.
;;;;;
;;;;; LysKOM 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 LysKOM; see the file COPYING. If not, write to
;;;;; Lysator, c/o ISY, Linkoping University, S-581 83 Linkoping, SWEDEN,
;;;;; or the Free Software Foundation, Inc., 675 Mass Ave, Cambridge,
;;;;; MA 02139, USA.
;;;;;
;;;;; Please mail bug reports to bug-lyskom@lysator.liu.se.
;;;;;
;;;; ================================================================
;;;; ================================================================
;;;;
;;;; File: help-compile.el
;;;;
;;;; Compiler for elisp-client help files. This file is only used for
;;;; compilation and is currently not linked into the runtime.
;;;;
(defvar lyskom-help-parse-debugging (getenv "LYSKOM_HELP_DEBUG"))
;;; Note that these are duplicated in help.el. Change one and change both!
(defsubst lyskom-help-create-data (tag attr data)
(list tag attr data))
(defsubst lyskom-help-data-get-tag (data)
(elt data 0))
(defsubst lyskom-help-data-get-attr (attr data)
(cdr (assq attr (elt data 1))))
(defsubst lyskom-help-data-get-attrs (data)
(elt data 1))
(defsubst lyskom-help-data-get-data (data)
(elt data 2))
(defmacro lyskom-help-traverse (atom sequence &rest body)
"Bind ATOM to each element in SEQUENCE and execute BODY.
Value returned is always nil."
`(let* ((__i__ 0)
(__sequence__ ,sequence)
(__len__ (or (listp __sequence__ )
(length __sequence__)))
(,atom nil)
(__result__ nil))
(setq __result__ __result__) ; Get rid of compiler warnings
(if (listp __sequence__)
(while __sequence__
(setq ,atom (car __sequence__))
,@body
(setq __sequence__ (cdr __sequence__)))
(while (< __i__ __len__)
(setq ,atom (aref __sequence__ __i__))
,@body
(setq __i__ (1+ __i__))))
__result__))
(defvar lyskom-help-syntax
'((help (language) nil (section) lyskom-help-parse-process-finish)
(section (id prompt) nil (p list h1 h2 h3 inline refer keymap call) lyskom-help-parse-process-section)
(h1 nil nil (cref TEXT) nil)
(h2 nil nil (cref TEXT) nil)
(h3 nil nil (cref TEXT) nil)
(p nil nil (b i cref list refer TEXT) nil)
(b nil nil (cref TEXT) nil)
(i nil nil (cref TEXT) nil)
(list nil (header) (item) nil)
(item nil nil (refer b i cref TEXT) nil)
(keymap nil nil nil)
(call (function) nil nil)
(inline (id) nil nil lyskom-help-parse-process-section-ref)
(refer (id) nil nil lyskom-help-parse-process-section-ref)
(cref (id) nil nil lyskom-help-parse-process-command-ref)
)
"Syntax of the help language.
Each element is the syntax for a single tag. Each list consists of
TAG ATTRS CONTENTS")
(defun lyskom-help-syntax-required-attrs (syntax)
"Return the required attributes of a syntax element"
(elt syntax 1))
(defun lyskom-help-syntax-optional-attrs (syntax)
"Return the required attributes of a syntax element"
(elt syntax 2))
(defun lyskom-help-syntax-contents (syntax)
"Return the allowed content types of a syntax element"
(elt syntax 3))
(defun lyskom-help-syntax-postprocess (syntax)
"Return the allowed content types of a syntax element"
(elt syntax 4))
(defvar lyskom-help-parse-section-list nil)
(defvar lyskom-help-parse-section-ref-list nil)
(defvar lyskom-help-parse-command-ref-list nil)
(defvar lyskom-help-parse-unresolved-section-references nil)
(defun lyskom-help-parse-process-section (parse)
(setq lyskom-help-parse-section-list
(cons (intern (lyskom-help-data-get-attr 'id parse))
lyskom-help-parse-section-list))
)
(defun lyskom-help-parse-process-section-ref (parse)
(setq lyskom-help-parse-section-ref-list
(cons (intern (lyskom-help-data-get-attr 'id parse))
lyskom-help-parse-section-ref-list))
)
(defun lyskom-help-parse-process-command-ref (parse)
(setq lyskom-help-parse-command-ref-list
(cons (intern (lyskom-help-data-get-attr 'id parse))
lyskom-help-parse-command-ref-list))
)
(defun lyskom-help-parse-process-finish (parse)
(lyskom-help-traverse id lyskom-help-parse-section-list
(setq lyskom-help-parse-section-ref-list
(delq id lyskom-help-parse-section-ref-list)))
(when lyskom-help-parse-section-ref-list
(setq lyskom-help-parse-unresolved-section-references
lyskom-help-parse-section-ref-list)
(error "Unresolved help section references: %s"
lyskom-help-parse-section-ref-list))
)
(defun lyskom-non-matching-regexp (string)
"Compute a regexp that will match anything but STRING."
(let ((alternatives nil)
(i 0))
(while (< i (length string))
(setq alternatives (cons (concat (substring string 0 i)
"[^"
(substring string i (1+ i))
"]")
alternatives)
i (1+ i)))
(concat "\\("
(mapconcat 'identity (nreverse alternatives) "\\|")
"\\)*")))
(defun lyskom-help-parse-attrs (string)
(save-match-data
(let ((result nil)
(start 0))
(while (string-match "\\s-*\\([a-z]+\\)=\"\\([^\"]*\\)\"\\s-*" string start)
(setq result (cons (cons (intern (match-string 1 string))
(match-string 2 string))
result)
start (match-end 0)))
(nreverse result))))
(defun lyskom-help-debug (fmt &rest args)
(and lyskom-help-parse-debugging
(apply 'message fmt args)))
(defun lyskom-help-parse-string (string &optional containing-syntax)
"Convert a help string STRING to a tree, checking it as we go.
CONTAINING-SYNTAX is the syntax specification for the containing tag."
(let ((result nil)
(collect-data (memq 'TEXT
(lyskom-help-syntax-contents containing-syntax)))
(start 0))
;; Loop over the string, looking for tags
(while (string-match
"<\\([a-z0-9]+\\)\\(\\(\\s-+[a-z0-9]+=\"[^\"]*\"\\)*\\)\\s-*\\(/*\\)>"
string start)
(let* ((tag (match-string 1 string))
(tag-symbol (intern tag))
(attrs (lyskom-help-parse-attrs (match-string 2 string)))
(tag-start (match-beginning 0))
(tag-end (match-end 0))
(end (string= "/" (match-string 4 string)))
(syntax (assq tag-symbol lyskom-help-syntax))
(contents nil))
(lyskom-help-debug "%s %S" tag attrs)
;; Check that the tag is known
(unless syntax (error "Unknown tag %s" tag))
;; Check that the tag is permitted in this context
(unless (memq tag-symbol
(lyskom-help-syntax-contents containing-syntax))
(error "Tag %s not permitted in %s" tag (car containing-syntax)))
;; Check that all required attributes are present
(lyskom-help-traverse required-attribute
(lyskom-help-syntax-required-attrs syntax)
(unless (assq required-attribute attrs)
(error "Missing required attribute %s to tag %s"
required-attribute tag)))
;; Check that all attributes are either required or optional
(lyskom-help-traverse attribute attrs
(unless (or (memq (car attribute) (lyskom-help-syntax-required-attrs syntax))
(memq (car attribute) (lyskom-help-syntax-optional-attrs syntax)))
(error "Invalid attribute %s to tag %s" (car attribute) tag)))
;; Found a tag, but there is intervening text
;; If we were called with instructions to save this data,
;; save it. If not, ensure that the intervening text only
;; consists of whitespace.
(when (> tag-start start)
(let ((text (substring string start tag-start)))
(cond (collect-data (setq result (cons (cons 'TEXT text) result)))
((string-match "\\`\\s-*\\'" text))
(t (error "Text data \"%s\" inside %s tag" text tag)))))
;; Find the position of the end tag
(let ((end-tag-start nil)
(end-tag-end nil))
(if end
(setq end-tag-start tag-end end-tag-end tag-end)
(let ((re (concat (lyskom-non-matching-regexp
(concat "</" tag ">"))
"\\(</" tag ">\\)")))
(if (string-match (concat "</" tag ">") string tag-end)
(setq end-tag-start (match-beginning 0)
end-tag-end (match-end 0))
(error "Unterminated tag: %s" tag tag-start))))
;; Have the position of the end tag
;; Put the element we found into result
(setq result
(cons (lyskom-help-create-data
tag-symbol
attrs
(if (eq end-tag-start tag-end)
nil
(lyskom-help-parse-string
(substring string tag-end end-tag-start)
syntax)))
result)
start end-tag-end)
;; Postprocess the parsed element
(when (lyskom-help-syntax-postprocess syntax)
(lyskom-help-debug " > postprocess")
(funcall (lyskom-help-syntax-postprocess syntax) (car result))
(lyskom-help-debug " < postprocess")
))))
;; No more tags
;; There's just text left. Record it.
(unless (eq start (length string))
(let ((text (substring string start)))
(cond (collect-data (setq result (cons (cons 'TEXT text) result)))
((string-match "\\`\\s-*\\'" text))
(t (error "Unexpected text \"%s\" at %d in document %s"
text start string)))))
;; Done. The result is, as usual, in reverse order.
(nreverse result)))
(defun lyskom-help-replace-regexp (regexp to-string)
(goto-char (point-min))
(while (re-search-forward regexp nil t)
(replace-match to-string nil nil)))
(defun lyskom-help-parse-help-file (filename)
(save-excursion
(let ((buffer (get-buffer-create "*Help*-parse"))
(lyskom-help-parse-section-list nil)
(lyskom-help-parse-section-ref-list nil)
(lyskom-help-parse-command-ref-list nil))
(set-buffer buffer)
(erase-buffer)
(insert-file-contents filename)
(lyskom-help-parse-buffer))))
(defun lyskom-help-parse-buffer ()
(lyskom-help-replace-regexp "[\r\n]" "")
(lyskom-help-replace-regexp "<!--[^>]*-->" "")
(lyskom-help-replace-regexp "<\\?xml[^>]*\\?>" "")
(lyskom-help-replace-regexp "\\s-+" " ")
(let ((parse (lyskom-help-parse-string (buffer-string)
'(toplevel nil nil (help)))))
parse))
(defun lyskom-help-parse-extract (parse tag)
(let ((result nil))
(lyskom-help-traverse toplevel parse
(when (eq (lyskom-help-data-get-tag toplevel) tag)
(setq result
(cons (list (intern (lyskom-help-data-get-attr 'id toplevel))
(lyskom-help-data-get-attr 'prompt toplevel)
toplevel)
result))))
(nreverse result)))
(defmacro lyskom-help-compile (language)
`(quote ,(lyskom-help-parse-extract
(lyskom-help-data-get-data
(car (lyskom-help-parse-help-file (format "help-%s.xml" language))))
'section)))
(defvar lyskom-help-language-mapping '((sv . "swedish") (en . "english")))
(defun lyskom-help-compile-to-el ()
(let* ((parse (lyskom-help-parse-buffer))
(result (lyskom-help-parse-extract (lyskom-help-data-get-data (car parse)) 'section))
(language-code (intern (lyskom-help-data-get-attr 'language (car parse))))
(language (cdr (assq language-code lyskom-help-language-mapping)))
(sym (intern (format "lyskom-%S-help-data" language-code))))
(if (null language)
(error "Unknown language code `%S'" language-code))
(set-buffer (get-buffer-create "*LysKOM Help Output*"))
(erase-buffer)
(setq buffer-file-coding-system 'iso-8859-1)
(let ((standard-output (current-buffer)))
(print `(defvar ,sym ',result))
(write-file (format "%s-help.el" language)))))
|
