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- ;;;; psgml-dtd.el --- DTD parser for SGML-editing mode with parsing support
- ;; $Id: psgml-dtd.el,v 2.15 1996/11/11 00:43:45 lenst Exp $
-
- ;; Copyright (C) 1994 Lennart Staflin
-
- ;; Author: Lennart Staflin <lenst@lysator.liu.se>
-
- ;; 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 2
- ;; 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, write to the Free Software
- ;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
-
- ;;;; Commentary:
-
- ;; Part of major mode for editing the SGML document-markup language.
-
-
- ;;;; Code:
-
- (provide 'psgml-dtd)
- (require 'psgml)
- (require 'psgml-parse)
-
-
- ;;;; Variables
-
- ;; Variables used during doctype parsing and loading
- (defvar sgml-used-pcdata nil
- "True if model group built is mixed")
-
-
- ;;;; Constructing basic
-
- (defun sgml-copy-moves (s1 s2)
- "Copy all moves from S1 to S2, keeping their status."
- (let ((l (sgml-state-opts s1)))
- (while l
- (sgml-add-opt-move s2
- (sgml-move-token (car l))
- (sgml-move-dest (car l)))
- (setq l (cdr l)))
- (setq l (sgml-state-reqs s1))
- (while l
- (sgml-add-req-move s2
- (sgml-move-token (car l))
- (sgml-move-dest (car l)))
- (setq l (cdr l)))))
-
- (defun sgml-copy-moves-to-opt (s1 s2)
- "Copy all moves from S1 to S2 as optional moves."
- (let ((l (sgml-state-opts s1)))
- (while l
- (sgml-add-opt-move s2
- (sgml-move-token (car l))
- (sgml-move-dest (car l)))
- (setq l (cdr l)))
- (setq l (sgml-state-reqs s1))
- (while l
- (sgml-add-opt-move s2
- (sgml-move-token (car l))
- (sgml-move-dest (car l)))
- (setq l (cdr l)))))
-
-
- (defun sgml-some-states-of (state)
- ;; List of some states reachable from STATE, includes all final states
- (let* ((states (list state))
- (l states)
- s ms m)
- (while l
- (setq s (car l)
- ms (append (sgml-state-opts s) (sgml-state-reqs s)))
- (while ms
- (setq m (sgml-move-dest (car ms))
- ms (cdr ms))
- (unless (sgml-normal-state-p m)
- (setq m (sgml-and-node-next m)))
- (unless (memq m states)
- (nconc states (list m))))
- (setq l (cdr l)))
- states))
-
- (defmacro sgml-for-all-final-states (s dfa &rest forms)
- "For all final states S in DFA do FORMS.
- Syntax: var dfa-expr &body forms"
- (` (let ((L-states (sgml-some-states-of (, dfa)))
- (, s))
- (while L-states
- (when (sgml-state-final-p (setq (, s) (car L-states)))
- (,@ forms))
- (setq L-states (cdr L-states))))))
-
- (put 'sgml-for-all-final-states 'lisp-indent-hook 2)
- (put 'sgml-for-all-final-states 'edebug-form-hook '(symbolp &rest form))
-
-
- ;;;; Optimization for the dfa building
-
- (defsubst sgml-empty-state-p (s)
- ;; True if S hase no outgoing moves
- (and (sgml-normal-state-p s)
- (null (sgml-state-reqs s))
- (null (sgml-state-opts s))) )
-
- (defun sgml-one-final-state (s)
- ;; Collaps all states that have no moves
- ;; This is a safe optimization, useful for (..|..|..)
- (sgml-debug "OPT one final: reqs %d opts %d"
- (length (sgml-state-reqs s))
- (length (sgml-state-opts s)))
- (let ((final nil)
- dest)
- (loop for m in (append (sgml-state-reqs s)
- (sgml-state-opts s))
- do
- (setq dest (sgml-move-dest m))
- (when (sgml-empty-state-p dest)
- (cond ((null final)
- (setq final dest))
- (t
- (setf (sgml-move-dest m) final)))))))
-
- (defun sgml-states-equal (s1 s2)
- (and (= (length (sgml-state-opts s1))
- (length (sgml-state-opts s2)))
- (= (length (sgml-state-reqs s1))
- (length (sgml-state-reqs s2)))
- (loop for m in (sgml-state-opts s1)
- always
- (eq (sgml-move-dest m)
- (sgml-move-dest (sgml-moves-lookup (sgml-move-token m)
- (sgml-state-opts s2)))))
- (loop for m in (sgml-state-reqs s1)
- always
- (eq (sgml-move-dest m)
- (sgml-move-dest (sgml-moves-lookup (sgml-move-token m)
- (sgml-state-reqs s2)))))))
-
- (defun sgml-remove-redundant-states-1 (s)
- ;; Remove states accessible from s with one move and equivalent to s,
- ;; by changing the moves from s.
- (sgml-debug "OPT redundant-1: reqs %d opts %d"
- (length (sgml-state-reqs s))
- (length (sgml-state-opts s)))
- (let ((yes nil)
- (no (list s))
- (l (sgml-state-reqs s))
- (nl (sgml-state-opts s))
- dest)
- (while (or l (setq l (prog1 nl (setq nl nil))))
- (cond
- ((not (sgml-normal-state-p (setq dest (sgml-move-dest (car l))))))
- ((memq dest no))
- ((memq dest yes))
- ((sgml-states-equal s dest)
- (progn (push dest yes))))
- (setq l (cdr l)))
- (setq l (sgml-state-opts s)
- nl (sgml-state-reqs s))
- (when yes
- (sgml-debug "OPT redundant-1: sucess %s" (length yes))
- (while (or l (setq l (prog1 nl (setq nl nil))))
- (cond ((memq (sgml-move-dest (car l)) yes)
- (setf (sgml-move-dest (car l)) s)))
- (setq l (cdr l))))))
-
-
-
- ;;;; Constructing
-
- (defun sgml-make-opt (s1)
- (when (sgml-state-reqs s1)
- (setf (sgml-state-opts s1)
- (nconc (sgml-state-opts s1)
- (sgml-state-reqs s1)))
- (setf (sgml-state-reqs s1) nil))
- s1)
-
- (defun sgml-make-* (s1)
- (setq s1 (sgml-make-+ s1))
- (when (sgml-state-reqs s1)
- (sgml-make-opt s1))
- (sgml-remove-redundant-states-1 s1)
- s1)
-
- (defun sgml-make-+ (s1)
- (sgml-for-all-final-states s s1
- (sgml-copy-moves-to-opt s1 s))
- (sgml-remove-redundant-states-1 s1) ; optimize
- s1)
-
- (defun sgml-make-conc (s1 s2)
- (let ((moves (append (sgml-state-reqs s1) (sgml-state-opts s1))))
- (cond
- (;; optimize the case where all moves from s1 goes to empty states
- (loop for m in moves
- always (sgml-empty-state-p (sgml-move-dest m)))
- (loop for m in moves do (setf (sgml-move-dest m) s2))
- (when (sgml-state-final-p s1)
- (sgml-copy-moves s2 s1)))
- (t ; general case
- (sgml-for-all-final-states s s1
- (sgml-copy-moves s2 s)
- (sgml-remove-redundant-states-1 s)))))
- s1)
-
- (defun sgml-make-pcdata ()
- (sgml-make-* (sgml-make-primitive-content-token sgml-pcdata-token)))
-
- (defun sgml-reduce-, (l)
- (while (cdr l)
- (setcar (cdr l)
- (sgml-make-conc (car l) (cadr l)))
- (setq l (cdr l)))
- (car l))
-
- (defun sgml-reduce-| (l)
- (while (cdr l) ; apply the binary make-alt
- (cond ((or (sgml-state-final-p (car l)) ; is result optional
- (sgml-state-final-p (cadr l)))
- (sgml-make-opt (car l))
- (sgml-copy-moves-to-opt (cadr l) (car l)))
- (t
- (sgml-copy-moves (cadr l) (car l))))
- (setcdr l (cddr l)))
- (sgml-one-final-state (car l)) ; optimization
- (car l))
-
- (defun sgml-make-& (dfas)
- (let ((&n (sgml-make-and-node dfas (sgml-make-state)))
- (s (sgml-make-state))
- (l dfas))
- (while l ; For each si:
- ;; For m in opts(si): add optional move from s to &n on token(m).
- (loop for m in (sgml-state-opts (car l))
- do (sgml-add-opt-move s (sgml-move-token m) &n))
- ;; For m in reqs(si): add required move from s to &n on token(m).
- (loop for m in (sgml-state-reqs (car l))
- do (sgml-add-req-move s (sgml-move-token m) &n))
- (setq l (cdr l)))
- ;; Return s.
- s))
-
-
-
- ;(sgml-make-conc (sgml-make-primitive-content-token 'para) (sgml-make-primitive-content-token 'list))
- ;(sgml-make-conc (sgml-make-& (list (sgml-make-primitive-content-token 'para) (sgml-make-primitive-content-token 'list))) (sgml-make-primitive-content-token 'foo))
-
- ;(setq x (sgml-some-states-of (sgml-make-primitive-content-token 'para)))
- ;(sgml-state-final-p (car x) )
- ;(sgml-state-final-p (cadr x))
-
-
- ;;;; Parse doctype: General
-
- (defun sgml-skip-ts ()
- ;; Skip over ts*
- ;;70 ts = 5 s | EE | 60+ parameter entity reference
- ;;For simplicity I use ps*
- ;;65 ps = 5 s | EE | 60+ parameter entity reference | 92 comment
- ;;*** some comments are accepted that shouldn't
- (sgml-skip-ps))
-
- (defun sgml-parse-character-reference (&optional dofunchar)
- ;; *** Actually only numerical character references
- ;; I don't know how to handel the function character references.
- ;; For the shortrefs let's give them numeric values.
- (if (if dofunchar
- (sgml-parse-delim "CRO" (digit nmstart))
- (sgml-parse-delim "CRO" (digit)))
- (prog1 (if (sgml-is-delim "NULL" digit)
- (string-to-int (sgml-check-nametoken))
- (let ((spec (sgml-check-name)))
- (or (cdr (assoc spec '(("re" . 10)
- ("rs" . 1)
- ("tab" . 9)
- ("space" . 32))))
- ;; *** What to do with other names?
- 127)))
- (or (sgml-parse-delim "REFC")
- (sgml-parse-RE)))))
-
- (defun sgml-parse-parameter-literal (&optional dofunchar)
- (let* (lita ; flag if lita
- (value ; accumulates literals value
- "")
- (original-buffer ; Buffer (entity) where lit started
- (current-buffer))
- temp
- )
- (cond
- ((or (sgml-parse-delim "LIT")
- (setq lita (sgml-parse-delim "LITA")))
- (while (not (and (eq (current-buffer) original-buffer)
- (if lita
- (sgml-parse-delim "LITA")
- (sgml-parse-delim "LIT"))))
- (cond ((eobp)
- (or (sgml-pop-entity)
- (sgml-error "Parameter literal unterminated")))
- ((sgml-parse-parameter-entity-ref))
- ((setq temp (sgml-parse-character-reference dofunchar))
- (setq value (concat value (if (< temp 256)
- (format "%c" temp)
- (format "%d;" temp)))))
- (t
- (setq value
- (concat value
- (buffer-substring
- (point)
- (progn (forward-char 1)
- (if lita
- (sgml-skip-upto ("LITA" "PERO" "CRO"))
- (sgml-skip-upto ("LIT" "PERO" "CRO")))
- (point)))))))
- )
- value))))
-
- (defun sgml-check-parameter-literal ()
- (or (sgml-parse-parameter-literal)
- (sgml-parse-error "Parameter literal expected")))
-
- (defsubst sgml-parse-connector ()
- (sgml-skip-ps)
- (cond ((sgml-parse-delim "SEQ")
- (function sgml-reduce-,))
- ((sgml-parse-delim "OR")
- (function sgml-reduce-|))
- ((sgml-parse-delim "AND")
- (function sgml-make-&))))
-
- (defun sgml-parse-name-group ()
- "Parse a single name or a name group (general name case) .
- Returns a list of strings or nil."
- (let (names)
- (cond
- ((sgml-parse-delim "GRPO")
- (sgml-skip-ps)
- (setq names (sgml-parse-name-group)) ; *** Allows more than it should
- (while (sgml-parse-connector)
- (sgml-skip-ps)
- (nconc names (sgml-parse-name-group)))
- (sgml-check-delim "GRPC")
- names)
- ((setq names (sgml-parse-name))
- (list names)))))
-
- (defun sgml-check-name-group ()
- (or (sgml-parse-name-group)
- (sgml-parse-error "Expecting a name or a name group")))
-
- (defun sgml-check-nametoken-group ()
- "Parse a name token group, return a list of strings.
- Case transformed for general names."
- (sgml-skip-ps)
- (let ((names nil))
- (cond
- ((sgml-parse-delim GRPO)
- (while (progn
- (sgml-skip-ps)
- (push (sgml-general-case (sgml-check-nametoken)) names)
- (sgml-parse-connector)))
- (sgml-check-delim GRPC)
- (nreverse names)) ; store in same order as declared
- (t
- (list (sgml-general-case (sgml-check-nametoken)))))))
-
- (defun sgml-check-element-type ()
- "Parse and check an element type, returns list of strings."
- ;;; 117 element type = [[30 generic identifier]]
- ;;; | [[69 name group]]
- ;;; | [[118 ranked element]]
- ;;; | [[119 ranked group]]
- (cond
- ((sgml-parse-delim GRPO)
- (sgml-skip-ts)
- (let ((names (list (sgml-check-name))))
- (while (progn (sgml-skip-ts)
- (sgml-parse-connector))
- (sgml-skip-ts)
- (nconc names (list (sgml-check-name))))
- (sgml-check-delim GRPC)
- ;; A ranked group will have a rank suffix here
- (sgml-skip-ps)
- (if (sgml-is-delim "NULL" digit)
- (let ((suffix (sgml-parse-nametoken)))
- (loop for n in names
- collect (concat n suffix)))
- names)))
- (t ; gi/ranked element
- (let ((name (sgml-check-name)))
- (sgml-skip-ps)
- (list (if (sgml-is-delim "NULL" digit)
- (concat name (sgml-check-nametoken))
- name))))))
-
-
- (defun sgml-check-external ()
- (or (sgml-parse-external)
- (sgml-parse-error "Expecting a PUBLIC or SYSTEM")))
-
- ;;;; Parse doctype: notation
-
- (defun sgml-declare-notation ()
- ;;148 notation declaration = MDO, "NOTATION",
- ;; 65 ps+, 41 notation name,
- ;; 65 ps+, 149 notation identifier,
- ;; 65 ps*, MDC
- ;;41 notation name = 55 name
- ;;149 notation identifier = 73 external identifier
- (sgml-skip-ps)
- (sgml-check-name)
- (sgml-skip-ps)
- (sgml-check-external))
-
-
- ;;;; Parse doctype: Element
-
- (defun sgml-parse-opt ()
- (sgml-skip-ps)
- (cond ((or (sgml-parse-char ?o)
- (sgml-parse-char ?O))
- t)
- ((sgml-parse-char ?-)
- nil)))
-
- (defun sgml-parse-modifier ()
- (cond ((sgml-parse-delim PLUS)
- (function sgml-make-+))
- ((sgml-parse-delim REP)
- (function sgml-make-*))
- ((sgml-parse-delim OPT)
- (function sgml-make-opt))))
-
- (defun sgml-check-primitive-content-token ()
- (sgml-make-primitive-content-token
- (sgml-eltype-token
- (sgml-lookup-eltype
- (sgml-check-name)))))
-
- (defun sgml-check-model-group ()
- (sgml-skip-ps)
- (let (el mod)
- (cond
- ((sgml-parse-delim "GRPO")
- (let ((subs (list (sgml-check-model-group)))
- (con1 nil)
- (con2 nil))
- (while (setq con2 (sgml-parse-connector))
- (cond ((and con1
- (not (eq con1 con2)))
- (sgml-parse-error "Mixed connectors")))
- (setq con1 con2)
- (setq subs (nconc subs (list (sgml-check-model-group)))))
- (sgml-check-delim "GRPC")
- (setq el (if con1
- (funcall con1 subs)
- (car subs)))))
- ((sgml-parse-rni "pcdata") ; #PCDATA
- (setq sgml-used-pcdata t)
- (setq el (sgml-make-pcdata)))
- ((sgml-parse-delim "DTGO") ; data tag group
- (sgml-skip-ts)
- (let ((tok (sgml-check-primitive-content-token)))
- (sgml-skip-ts) (sgml-check-delim "SEQ")
- (sgml-skip-ts) (sgml-check-data-tag-pattern)
- (sgml-skip-ts) (sgml-check-delim "DTGC")
- (setq el (sgml-make-conc tok (sgml-make-pcdata)))
- (setq sgml-used-pcdata t)))
- (t
- (setq el (sgml-check-primitive-content-token))))
- (setq mod (sgml-parse-modifier))
- (if mod
- (funcall mod el)
- el)))
-
- (defun sgml-check-data-tag-pattern ()
- ;; 134 data tag pattern
- ;; template | template group
- (cond ((sgml-parse-delim GRPO)
- (sgml-skip-ts)
- (sgml-check-parameter-literal) ; data tag template,
- (while (progn (sgml-skip-ts)
- (sgml-parse-delim OR))
- (sgml-skip-ts)
- (sgml-check-parameter-literal)) ; data tag template
- (sgml-skip-ts)
- (sgml-check-delim GRPC))
- (t
- (sgml-check-parameter-literal))) ; data tag template
- (sgml-skip-ts)
- (when (sgml-parse-delim SEQ)
- (sgml-check-parameter-literal))) ; data tag padding template
-
- (defun sgml-check-content-model ()
- (sgml-check-model-group))
-
- (defun sgml-check-content ()
- (sgml-skip-ps)
- (cond ((sgml-is-delim GRPO)
- (sgml-check-content-model))
- (t
- ;; ANY, CDATA, RCDATA or EMPTY
- (let ((dc (intern (upcase (sgml-check-name)))))
- (when (eq dc 'ANY)
- (setq sgml-used-pcdata t))
- dc))))
-
- (defun sgml-parse-exeption (type)
- (sgml-skip-ps)
- (if (sgml-parse-char type)
- (mapcar (function sgml-lookup-eltype)
- (sgml-check-name-group))))
-
- (defun sgml-before-eltype-modification ()
- ;;; (let ((merged (sgml-dtd-merged sgml-dtd-info)))
- ;;; (when (and merged
- ;;; (eq (sgml-dtd-eltypes sgml-dtd-info)
- ;;; (sgml-dtd-eltypes (cdr merged))))
- ;;; (setf (sgml-dtd-eltypes sgml-dtd-info)
- ;;; (sgml-merge-eltypes (sgml-make-eltypes-table)
- ;;; (sgml-dtd-eltypes sgml-dtd-info)))))
- )
-
- (defun sgml-declare-element ()
- (let* ((names (sgml-check-element-type))
- (stag-opt (sgml-parse-opt))
- (etag-opt (sgml-parse-opt))
- (sgml-used-pcdata nil)
- (model (sgml-check-content))
- (exclusions (sgml-parse-exeption ?-))
- (inclusions (sgml-parse-exeption ?+)))
- (sgml-before-eltype-modification)
- (while names
- (sgml-debug "Defining element %s" (car names))
- (let ((et (sgml-lookup-eltype (car names))))
- (setf (sgml-eltype-stag-optional et) stag-opt
- (sgml-eltype-etag-optional et) etag-opt
- (sgml-eltype-model et) model
- (sgml-eltype-mixed et) sgml-used-pcdata
- (sgml-eltype-excludes et) exclusions
- (sgml-eltype-includes et) inclusions))
- (setq names (cdr names)))
- (sgml-lazy-message "Parsing doctype (%s elements)..."
- (incf sgml-no-elements))))
-
- ;;;; Parse doctype: Entity
-
- (defun sgml-declare-entity ()
- (let (name ; Name of entity
- dest ; Entity table
- (type 'text) ; Type of entity
- text ; Text of entity
- extid ; External id
- )
- (cond
- ((sgml-parse-delim "PERO") ; parameter entity declaration
- (sgml-skip-ps)
- (setq name (sgml-check-name t))
- (setq dest (sgml-dtd-parameters sgml-dtd-info)))
- (t ; normal entity declaration
- (or (sgml-parse-rni "default")
- (setq name (sgml-check-name t)))
- (setq dest (sgml-dtd-entities sgml-dtd-info))))
- (sgml-skip-ps)
- ;;105 entity text = 66 parameter literal
- ;; | 106 data text
- ;; | 107 bracketed text
- ;; | 108 external entity specification
- (setq extid (sgml-parse-external))
- (setq text
- (cond
- (extid ; external entity specification =
- ; 73 external identifier,
- ; (65 ps+, 109+ entity type)?
- (sgml-skip-ps)
- (setq type (or (sgml-parse-entity-type) 'text))
- extid)
- ((sgml-startnm-char-next)
- (let ((token (intern (sgml-check-name))))
- (sgml-skip-ps)
- (cond
- ((memq token '(cdata sdata)) ; data text ***
- (setq type token)
- (sgml-check-parameter-literal))
- ((eq token 'pi)
- (concat "<?" (sgml-check-parameter-literal) ">"))
- ((eq token 'starttag)
- (sgml-start-tag-of (sgml-check-parameter-literal)))
- ((eq token 'endtag)
- (sgml-end-tag-of (sgml-check-parameter-literal)))
- ((eq token 'ms) ; marked section
- (concat "<![" (sgml-check-parameter-literal) "]]>"))
- ((eq token 'md) ; Markup declaration
- (concat "<!" (sgml-check-parameter-literal) ">")))))
- ((sgml-check-parameter-literal))))
- (when dest
- (sgml-entity-declare name dest type text))))
-
-
- (defun sgml-parse-entity-type ()
- ;;109+ entity type = "SUBDOC"
- ;; | (("CDATA" | "NDATA" | "SDATA"),
- ;; 65 ps+,
- ;; 41 notation name,
- ;; 149.2+ data attribute specification?)
- (let ((type (sgml-parse-name)))
- (when type
- (setq type (intern (downcase type)))
- (cond ((eq type 'subdoc))
- ((memq type '(cdata ndata sdata))
- (sgml-skip-ps)
- (sgml-check-name)
- ;;149.2+ data attribute specification
- ;; = 65 ps+, DSO,
- ;; 31 attribute specification list,
- ;; 5 s*, DSC
- (sgml-skip-ps)
- (when (sgml-parse-delim DSO)
- (sgml-parse-attribute-specification-list)
- (sgml-parse-s)
- (sgml-check-delim DSC)))
- (t (sgml-error "Illegal entity type: %s" type))))
- type))
-
-
- ;;;; Parse doctype: Attlist
-
- (defun sgml-declare-attlist ()
- (let* ((assnot (cond ((sgml-parse-rni "notation")
- (sgml-skip-ps)
- t)))
- (assel (sgml-check-name-group))
- (attlist nil) ; the list
- (attdef nil))
- (while (setq attdef (sgml-parse-attribute-definition))
- (push attdef attlist))
- (setq attlist (nreverse attlist))
- (unless assnot
- (sgml-before-eltype-modification)
- (loop for elname in assel do
- (setf (sgml-eltype-attlist (sgml-lookup-eltype elname))
- attlist)))))
-
- (defun sgml-parse-attribute-definition ()
- (sgml-skip-ps)
- (if (sgml-is-delim MDC) ; End of attlist?
- nil
- (sgml-make-attdecl (sgml-check-name)
- (sgml-check-declared-value)
- (sgml-check-default-value))))
-
- (defun sgml-check-declared-value ()
- (sgml-skip-ps)
- (let ((type 'name-token-group)
- (names nil))
- (unless (eq (following-char) ?\()
- (setq type (intern (sgml-check-name)))
- (sgml-skip-ps))
- (when (memq type '(name-token-group notation))
- (setq names (sgml-check-nametoken-group)))
- (sgml-make-declared-value type names)))
-
- (defun sgml-check-default-value ()
- (sgml-skip-ps)
- (let* ((rni (sgml-parse-rni))
- (key (if rni (intern (sgml-check-name)))))
- (sgml-skip-ps)
- (sgml-make-default-value
- key
- (if (or (not rni) (eq key 'fixed))
- (sgml-check-attribute-value-specification)))))
-
-
- ;;;; Parse doctype: Shortref
-
- ;;;150 short reference mapping declaration = MDO, "SHORTREF",
- ;;; [[65 ps]]+, [[151 map name]],
- ;;; ([[65 ps]]+, [[66 parameter literal]],
- ;;; [[65 ps]]+, [[55 name]])+,
- ;;; [[65 ps]]*, MDC
-
- (defun sgml-declare-shortref ()
- (let ((mapname (sgml-check-name))
- mappings literal name)
- (while (progn
- (sgml-skip-ps)
- (setq literal (sgml-parse-parameter-literal 'dofunchar)))
- (sgml-skip-ps)
- (setq name (sgml-check-name t))
- (push (cons literal name) mappings))
- (sgml-add-shortref-map
- (sgml-dtd-shortmaps sgml-dtd-info)
- mapname
- (sgml-make-shortmap mappings))))
-
- ;;;152 short reference use declaration = MDO, "USEMAP",
- ;;; [[65 ps]]+, [[153 map specification]],
- ;;; ([[65 ps]]+, [[72 associated element type]])?,
- ;;; [[65 ps]]*, MDC
-
- (defun sgml-do-usemap-element (mapname)
- ;; This is called from sgml-do-usemap with the mapname
- (sgml-before-eltype-modification)
- (loop for e in (sgml-parse-name-group) do
- (setf (sgml-eltype-shortmap (sgml-lookup-eltype e sgml-dtd-info))
- (if (null mapname)
- 'empty
- mapname))))
-
-
- ;;;; Parse doctype
-
- (defun sgml-check-dtd-subset ()
- (let ((sgml-parsing-dtd t)
- (eref sgml-current-eref))
- (while
- (progn
- (setq sgml-markup-start (point))
- (cond
- ((and (eobp) (eq sgml-current-eref eref))
- nil)
- ((sgml-parse-ds))
- ((sgml-parse-markup-declaration 'dtd))
- ((sgml-parse-delim "MS-END")))))))
-
-
- ;;;; Save DTD: compute translation
-
- (defvar sgml-translate-table nil)
-
- (defun sgml-translate-node (node)
- (assert (not (numberp node)))
- (let ((tp (assq node sgml-translate-table)))
- (unless tp
- (setq tp (cons node (length sgml-translate-table)))
- (nconc sgml-translate-table (list tp)))
- (cdr tp)))
-
- (defun sgml-translate-moves (moves)
- (while moves
- (sgml-translate-node (sgml-move-dest (car moves)))
- (setq moves (cdr moves))))
-
- (defun sgml-translate-model (model)
- (let* ((sgml-translate-table (list (cons model 0)))
- (p sgml-translate-table))
- (while p
- (cond ((sgml-normal-state-p (caar p))
- (sgml-translate-moves (sgml-state-opts (caar p)))
- (sgml-translate-moves (sgml-state-reqs (caar p))))
- (t
- (sgml-translate-node (sgml-and-node-next (caar p)))))
- (setq p (cdr p)))
- sgml-translate-table))
-
- ;;;; Save DTD: binary coding
-
- (defvar sgml-code-token-numbers nil)
- (defvar sgml-code-xlate nil)
-
- (defsubst sgml-code-xlate (node)
- ;;(let ((x (cdr (assq node sgml-code-xlate)))) (assert x) x)
- (cdr (assq node sgml-code-xlate)))
-
- (defun sgml-code-number (num)
- (if (> num sgml-max-single-octet-number)
- (insert (+ (lsh (- num sgml-max-single-octet-number) -8)
- sgml-max-single-octet-number 1)
- (logand (- num sgml-max-single-octet-number) 255))
- (insert num)))
-
- (defun sgml-code-token-number (token)
- (let ((bp (assq token sgml-code-token-numbers)))
- (unless bp
- (setq sgml-code-token-numbers
- (nconc sgml-code-token-numbers
- (list (setq bp (cons token
- (length sgml-code-token-numbers)))))))
- (cdr bp)))
-
- (defun sgml-code-token (token)
- (sgml-code-number (sgml-code-token-number token)))
-
- (defmacro sgml-code-sequence (loop-c &rest body)
- "Produce the binary coding of a counted sequence from a list.
- Syntax: (var seq) &body forms
- FORMS should produce the binary coding of element in VAR."
- (let ((var (car loop-c))
- (seq (cadr loop-c)))
- (` (let ((seq (, seq)))
- (sgml-code-number (length seq))
- (loop for (, var) in seq
- do (,@ body))))))
-
- (put 'sgml-code-sequence 'lisp-indent-hook 1)
- (put 'sgml-code-sequence 'edbug-forms-hook '(sexp &rest form))
-
- (defun sgml-code-sexp (sexp)
- (let ((standard-output (current-buffer)))
- (prin1 sexp)
- (terpri)))
-
- (defun sgml-code-tokens (l)
- (sgml-code-sequence (x l)
- (sgml-code-token x)))
-
- (defsubst sgml-code-move (m)
- (sgml-code-token (sgml-move-token m))
- (insert (sgml-code-xlate (sgml-move-dest m))))
-
- (defun sgml-code-model (m)
- (let ((sgml-code-xlate (sgml-translate-model m)))
- (sgml-code-sequence (s sgml-code-xlate) ; s is (node . number)
- (setq s (car s)) ; s is node
- (cond
- ((sgml-normal-state-p s)
- (assert (and (< (length (sgml-state-opts s)) 255)
- (< (length (sgml-state-reqs s)) 256)))
- (sgml-code-sequence (x (sgml-state-opts s))
- (sgml-code-move x))
- (sgml-code-sequence (x (sgml-state-reqs s))
- (sgml-code-move x)))
- (t ; s is a &-node
- (insert 255) ; Tag &-node
- (insert (sgml-code-xlate (sgml-and-node-next s)))
- (sgml-code-sequence (m (sgml-and-node-dfas s))
- (sgml-code-model m)))))))
-
- (defun sgml-code-element (et)
- (sgml-code-sexp (sgml-eltype-all-miscdata et))
- (cond
- ((not (sgml-eltype-defined et))
- (insert 128))
- (t
- (insert (sgml-eltype-flags et))
- (let ((c (sgml-eltype-model et)))
- (cond ((eq c sgml-cdata) (insert 0))
- ((eq c sgml-rcdata) (insert 1))
- ((eq c sgml-empty) (insert 2))
- ((eq c sgml-any) (insert 3))
- ((null c) (insert 4))
- (t
- (assert (sgml-model-group-p c))
- (insert 128)
- (sgml-code-model c))))
- (sgml-code-tokens (sgml-eltype-includes et))
- (sgml-code-tokens (sgml-eltype-excludes et)))))
-
-
- (defun sgml-code-dtd (dtd)
- "Produce the binary coding of the current DTD into the current buffer."
- (sgml-code-sexp (sgml-dtd-dependencies dtd))
- (sgml-code-sexp (sgml-dtd-parameters dtd))
- (sgml-code-sexp (sgml-dtd-doctype dtd))
- (let ((done 0) ; count written elements
- tot)
- (setq sgml-code-token-numbers nil)
- (sgml-code-token-number sgml-pcdata-token) ; Make #PCDATA token 0
- (sgml-map-eltypes ; Assign numbers to all tokens
- (function (lambda (et)
- (sgml-code-token-number (sgml-eltype-token et))))
- dtd nil t)
- (setq tot (length sgml-code-token-numbers))
- ;; Produce the counted sequence of element type names
- (sgml-code-sequence (pair (cdr sgml-code-token-numbers))
- (sgml-code-sexp (sgml-eltype-name (car pair))))
- ;; Produce the counted sequence of element types
- (sgml-code-sequence (pair (cdr sgml-code-token-numbers))
- (setq done (1+ done))
- (sgml-code-element (car pair))
- (sgml-lazy-message "Saving DTD %d%% done" (/ (* 100 done) tot)))
- (sgml-code-sexp (sgml-dtd-entities dtd))
- (sgml-code-sexp (sgml-dtd-shortmaps dtd))
- (sgml-code-sexp (sgml-dtd-notations dtd))))
-
-
- ;;;; Save DTD
-
- (defun sgml-save-dtd (file)
- "Save the parsed dtd on FILE."
- (interactive
- (let* ((tem (expand-file-name
- (or sgml-default-dtd-file
- (sgml-default-dtd-file))))
- (dir (file-name-directory tem))
- (nam (file-name-nondirectory tem)))
- (list
- (read-file-name "Save DTD in: " dir tem nil nam))))
- (setq file (expand-file-name file))
- (when (equal file (buffer-file-name))
- (error "Would clobber current file"))
- (sgml-need-dtd)
- (sgml-push-to-entity (sgml-make-entity "#SAVE" nil ""))
- (sgml-write-dtd sgml-dtd-info file)
- (sgml-pop-entity)
- (setq sgml-default-dtd-file
- (if (equal (expand-file-name default-directory)
- (file-name-directory file))
- (file-name-nondirectory file)
- file))
- (setq sgml-loaded-dtd file))
-
- (defun sgml-write-dtd (dtd file)
- "Save the parsed dtd on FILE.
- Construct the binary coded DTD (bdtd) in the current buffer."
- (insert
- ";;; This file was created by psgml on " (current-time-string) "\n"
- "(sgml-saved-dtd-version 6)\n")
- (sgml-code-dtd dtd)
- (setq file-type 1)
- (write-region (point-min) (point-max) file))
-
-
- ;;; psgml-dtd.el ends here
-