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|
;;;; psgml-info.el
;;; Last edited: Wed Mar 20 21:24:16 1996 by lenst@triton.lstaflin.pp.se (Lennart Staflin)
;;; $Id: psgml-info.el,v 2.4 1996/03/31 21:31:38 lenst Exp $
;; Copyright (C) 1994, 1995 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:
;; This file is an addon to the PSGML package.
;; This file contains some commands to print out information about the
;; current DTD.
;; sgml-list-elements
;; Will list all elements and the attributes declared for the element.
;; sgml-list-attributes
;; Will list all attributes declared and the elements that use them.
;; sgml-list-terminals
;; Will list all elements that can contain data.
;; sgml-list-occur-in-elements
;; Will list all element types and where it can occur.
;; sgml-list-content-elements
;; Will list all element types and the element types that can occur
;; in its content.
;;;; Code:
(require 'psgml)
(require 'psgml-parse)
(defconst sgml-attr-col 18)
;;;; Utility functions
(defsubst sgml-add-to-table (row-index elem table)
(let ((p (assoc row-index table)))
(cond ((null p)
(cons (list row-index elem) table))
(t
(nconc p (list elem))
table))))
(defsubst sgml-add-last-unique (x l)
(unless (memq x l)
(nconc l (list x))))
(defun sgml-map-element-types (func)
(sgml-need-dtd)
(sgml-map-eltypes func
(sgml-pstate-dtd sgml-buffer-parse-state)
t))
(defun sgml-eltype-refrenced-elements (eltype)
"List of element types referenced in the model of ELTYPE."
;; Now with cache. Uses appdata prop re-cache.
(or
(sgml-eltype-appdata eltype 're-cache)
(let* ((res ; result list (eltypes)
nil)
(states ; list of states
(list (sgml-eltype-model eltype)))
(agenda ; point into states
states))
(cond
((not (sgml-model-group-p (car states)))
nil)
(t
(while agenda
(cond
((sgml-normal-state-p (car agenda))
(loop for m in (append (sgml-state-opts (car agenda))
(sgml-state-reqs (car agenda)))
do
(pushnew (sgml-move-token m) res)
(sgml-add-last-unique (sgml-move-dest m) states)))
(t ; &-node
(sgml-add-last-unique (sgml-and-node-next (car agenda)) states)
(loop for dfa in (sgml-and-node-dfas (car agenda)) do
(sgml-add-last-unique dfa states))))
(setq agenda (cdr agenda)))
(setq res (sort (set-difference
(union res (sgml-eltype-includes eltype))
(sgml-eltype-excludes eltype))
(function string-lessp)))
(setf (sgml-eltype-appdata eltype 're-cache) res)
res)))))
;;;; List elements
(defun sgml-list-elements ()
"List the elements and their attributes in the current DTD."
(interactive)
(message "Creating table...")
(sgml-display-table
(sgml-map-element-types
(function
(lambda (eltype)
(cons (sgml-eltype-name eltype)
(mapcar (function sgml-attdecl-name)
(sgml-eltype-attlist eltype))))))
"Elements" "Element" "Attribute"))
;;;; List attributes
(defun sgml-list-attributes ()
"List the attributes and in which elements they occur."
(interactive)
(let ((attributes nil))
(message "Creating table...")
(sgml-map-element-types
(function
(lambda (eltype)
(loop for a in (sgml-eltype-attlist eltype) do
(setq attributes
(sgml-add-to-table (sgml-attdecl-name a)
(sgml-eltype-name eltype)
attributes))))))
(sgml-display-table attributes
"Attributes" "Attribute" "Element")))
;;;; List terminals
(defun sgml-list-terminals ()
"List the elements that can have data in their content."
(interactive)
(message "Creating table...")
(let ((data-models (list sgml-cdata sgml-rcdata sgml-any)))
(sgml-display-table
(delq nil
(sgml-map-element-types
(function
(lambda (eltype)
(if (or (sgml-eltype-mixed eltype)
(memq (sgml-eltype-model eltype) data-models))
(list (sgml-eltype-name eltype)
(symbol-name
(if (sgml-model-group-p (sgml-eltype-model eltype))
'mixed
(sgml-eltype-model eltype)))))))))
"Terminals" "Element" "Content")))
;;;; Element cross reference list
(defun sgml-list-content-elements ()
"List all element types and the element types that can occur in its content."
(interactive)
(message "Creating table...")
(sgml-display-table
(sgml-map-element-types
(function
(lambda (eltype)
(cons (sgml-eltype-name eltype)
(mapcar (function sgml-eltype-name)
(sgml-eltype-refrenced-elements eltype))))))
"Elements refrenced by elements"
"Element" "Content"))
(defun sgml-list-occur-in-elements ()
"List all element types and where it can occur."
(interactive)
(message "Creating table...")
(let ((cross nil))
(sgml-map-element-types
(function
(lambda (eltype)
(loop for ref in (sgml-eltype-refrenced-elements eltype)
do (setq cross (sgml-add-to-table ref
(sgml-eltype-name eltype)
cross))))))
(sgml-display-table
cross
"Cross referenced element types" "Element" "Can occur in")))
;;;; Display table
(defun sgml-display-table (table title col-title1 col-title2
&optional width nosort)
(or width
(setq width sgml-attr-col))
(let ((buf (get-buffer-create (format "*%s*" title))))
(message "Preparing display...")
(set-buffer buf)
(erase-buffer)
(insert col-title1)
(indent-to width)
(insert col-title2 "\n")
(insert-char ?= (length col-title1))
(indent-to width)
(insert-char ?= (length col-title2))
(insert "\n")
(unless nosort
(setq table (sort table (function (lambda (a b)
(string< (car a) (car b)))))))
(loop for e in table do
(insert (format "%s" (car e)))
(loop for name in (if nosort
(cdr e)
(sort (cdr e) (function string-lessp)))
do
(when (> (+ (length name) (current-column))
fill-column)
(insert "\n"))
(when (< (current-column) sgml-attr-col)
(indent-to width))
(insert name " "))
(insert "\n"))
(goto-char (point-min))
(display-buffer buf)
(message nil)))
;;;; Describe entity
(defun sgml-describe-entity (name)
"Describe the properties of an entity as declared in the current DTD."
(interactive
(let (default input)
(sgml-need-dtd)
(save-excursion
(sgml-with-parser-syntax
(unless (sgml-parse-delim "ERO")
(skip-chars-backward "^&\"'= \t\n"))
(setq default (or (sgml-parse-name t) ""))))
(setq input (completing-read
(format "Entity name (%s): " default)
(sgml-entity-completion-table
(sgml-dtd-entities
(sgml-pstate-dtd sgml-buffer-parse-state)))))
(list
(if (equal "" input) default input))))
(with-output-to-temp-buffer "*Help*"
(let ((entity (sgml-lookup-entity name
(sgml-dtd-entities
(sgml-pstate-dtd
sgml-buffer-parse-state)))))
(or entity (error "Undefined entity"))
(princ (format "Entity %s is %s\n"
name
(cond ((null entity)
"undefined")
(t
(format "a %s entity"
(sgml-entity-type entity))))))
(when entity
(let ((text (sgml-entity-text entity)))
(cond ((stringp text)
(princ "Defined to be:\n")
(princ text))
(t
(princ "With external identifier ")
(princ (if (car text) "PUBLIC" "SYSTEM"))
(when (car text)
(princ (format " '%s'" (car text))))
(when (cdr text)
(princ (format " '%s'" (cdr text)))))))))))
;;;; Describe element type
(defun sgml-describe-element-type (et-name)
"Describe the properties of an element type as declared in the current DTD."
(interactive
(let (default input)
(sgml-need-dtd)
(save-excursion
(sgml-with-parser-syntax
(unless (sgml-parse-delim "STAGO")
(skip-syntax-backward "w_"))
(setq default (sgml-parse-name))
(unless (and default
(sgml-eltype-defined (sgml-lookup-eltype default)))
(setq default nil))))
(setq input (sgml-read-element-type (if default
(format "Element type (%s): "
default)
"Element type: ")
sgml-dtd-info
default))
(list
(sgml-eltype-name input))))
(sgml-need-dtd)
(let ((et (sgml-lookup-eltype et-name)))
(with-output-to-temp-buffer "*Help*"
(princ (format "ELEMENT: %s\n\n" (sgml-eltype-name et)))
(princ (format " Start-tag is %s.\n End-tag is %s.\n"
(if (sgml-eltype-stag-optional et)
"optional" "required")
(if (sgml-eltype-etag-optional et)
"optional" "required")))
(princ "\nATTRIBUTES:\n")
(loop for attdecl in (sgml-eltype-attlist et) do
(let ((name (sgml-attdecl-name attdecl))
(dval (sgml-attdecl-declared-value attdecl))
(defl (sgml-attdecl-default-value attdecl)))
(when (listp dval)
(setq dval (concat (if (eq (first dval)
'notation)
"#NOTATION (" "(")
(mapconcat (function identity)
(second dval)
"|")
")")))
(cond ((sgml-default-value-type-p 'fixed defl)
(setq defl (format "#FIXED '%s'"
(sgml-default-value-attval defl))))
((symbolp defl)
(setq defl (upcase (format "#%s" defl))))
(t
(setq defl (format "'%s'"
(sgml-default-value-attval defl)))))
(princ (format " %-9s %-30s %s\n" name dval defl))))
;; ----
(let ((s (sgml-eltype-shortmap et)))
(when s
(princ (format "\nUSEMAP: %s\n" s))))
;; ----
(princ "\nOCCURS IN:\n\n")
(let ((occurs-in ()))
(sgml-map-eltypes
(function (lambda (cand)
(when (memq et (sgml-eltype-refrenced-elements cand))
(push cand occurs-in))))
(sgml-pstate-dtd sgml-buffer-parse-state))
(loop with col = 0
for occur-et in (sort occurs-in (function string-lessp))
for name = (sgml-eltype-name occur-et)
do
(when (and (> col 0) (> (+ col (length name) 1) fill-column))
(princ "\n")
(setq col 0))
(princ " ") (princ name)
(incf col (length name))
(incf col 1))))))
;;;; Print general info about the DTD.
(defun sgml-general-dtd-info ()
"Display information about the current DTD."
(interactive)
(sgml-need-dtd)
(let ((elements 0)
(entities 0)
(parameters 0)
(fmt "%20s %s\n")
(hdr "")
)
(sgml-map-eltypes (function (lambda (e) (incf elements)))
sgml-dtd-info)
(sgml-map-entities (function (lambda (e) (incf entities)))
(sgml-dtd-entities sgml-dtd-info))
(sgml-map-entities (function (lambda (e) (incf parameters)))
(sgml-dtd-parameters sgml-dtd-info))
(with-output-to-temp-buffer "*Help*"
(princ (format fmt "Doctype:" (sgml-dtd-doctype sgml-dtd-info)))
(when (sgml-dtd-merged sgml-dtd-info)
(princ (format fmt "Compiled DTD:"
(car (sgml-dtd-merged sgml-dtd-info)))))
(princ (format fmt "Element types:" (format "%d" elements)))
(princ (format fmt "Entities:" (format "%d" entities)))
(princ (format fmt "Parameter entities:" (format "%d" parameters)))
(setq hdr "Files used:")
(loop for x in (sgml-dtd-dependencies sgml-dtd-info)
if (stringp x)
do (princ (format fmt hdr x))
(setq hdr ""))
(setq hdr "Undef parameters:")
(sgml-map-entities
(function (lambda (entity)
(when (sgml-entity-marked-undefined-p entity)
(princ (format fmt hdr (sgml-entity-name entity)))
(setq hdr ""))))
(sgml-dtd-parameters sgml-dtd-info)))))
;;; psgml-info.el ends here
|
