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;;; semantic/tag-write.el --- Write tags to a text stream
;; Copyright (C) 2008-2021 Free Software Foundation, Inc.
;; Author: Eric M. Ludlam <zappo@gnu.org>
;; This file is part of GNU Emacs.
;; GNU Emacs 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.
;; GNU Emacs 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; Routine for writing out a list of tags to a text stream.
;;
;; These routines will be used by semanticdb to output a tag list into
;; a text stream to be saved to a file. Ideally, you could use tag streams
;; to share tags between processes as well.
;;
;; As a bonus, these routines will also validate the tag structure, and make sure
;; that they conform to good semantic tag hygiene.
;;
(require 'semantic)
;;; Code:
(defun semantic-tag-write-one-tag (tag &optional indent)
"Write a single tag TAG to standard out.
INDENT is the amount of indentation to use for this tag."
(when (not (semantic-tag-p tag))
(signal 'wrong-type-argument (list tag 'semantic-tag-p)))
(when (not indent) (setq indent 0))
;(princ (make-string indent ? ))
(princ "(")
;; Base parts
(let ((name (semantic-tag-name tag))
(class (semantic-tag-class tag)))
(prin1 name)
(princ " ")
(princ (symbol-name class))
)
(let ((attr (semantic-tag-attributes tag))
)
;; Attributes
(cond ((not attr)
(princ " nil"))
((= (length attr) 2) ;; One item
(princ " (")
(semantic-tag-write-one-attribute attr indent)
(princ ")")
)
(t
;; More than one tag.
(princ "\n")
(princ (make-string (+ indent 3) ? ))
(princ "(")
(while attr
(semantic-tag-write-one-attribute attr (+ indent 4))
(setq attr (cdr (cdr attr)))
(when attr
(princ "\n")
(princ (make-string (+ indent 4) ? )))
)
(princ ")\n")
(princ (make-string (+ indent 3) ? ))
))
;; Properties - for now, always nil.
(let ((rs (semantic--tag-get-property tag 'reparse-symbol)))
(if (not rs)
(princ " nil")
;; Else, put in the property list.
(princ " (reparse-symbol ")
(princ (symbol-name rs))
(princ ")"))
))
;; Overlay
(if (semantic-tag-with-position-p tag)
(let ((bounds (semantic-tag-bounds tag)))
(princ " ")
(prin1 (apply 'vector bounds))
)
(princ " nil"))
;; End it.
(princ ")")
)
(defun semantic-tag-write-tag-list (tlist &optional indent dontaddnewline)
"Write the tag list TLIST to the current stream.
INDENT indicates the current indentation level.
If optional DONTADDNEWLINE is non-nil, then don't add a newline."
(if (not indent)
(setq indent 0)
(unless dontaddnewline
;; Assume cursor at end of current line. Add a CR, and make the list.
(princ "\n")
(princ (make-string indent ? ))))
(princ "( ")
(while tlist
(if (semantic-tag-p (car tlist))
(semantic-tag-write-one-tag (car tlist) (+ indent 2))
;; If we don't have a tag in the tag list, use the below hack, and hope
;; it doesn't contain anything bad. If we find something bad, go back here
;; and start extending what's expected here.
(princ (format "%S" (car tlist))))
(setq tlist (cdr tlist))
(when tlist
(princ "\n")
(princ (make-string (+ indent 2) ? )))
)
(princ ")")
(princ (make-string indent ? ))
)
;; Writing out random stuff.
(defun semantic-tag-write-one-attribute (attrs indent)
"Write out one attribute from the head of the list of attributes ATTRS.
INDENT is the current amount of indentation."
(when (not attrs) (signal 'wrong-type-argument (list 'listp attrs)))
(when (not (symbolp (car attrs))) (error "Bad Attribute List in tag"))
(princ (symbol-name (car attrs)))
(princ " ")
(semantic-tag-write-one-value (car (cdr attrs)) indent)
)
(defun semantic-tag-write-one-value (value indent)
"Write out a VALUE for something in a tag.
INDENT is the current tag indentation.
Items that are long lists of tags may need their own line."
(cond
;; Another tag.
((semantic-tag-p value)
(semantic-tag-write-one-tag value (+ indent 2)))
;; A list of more tags
((and (listp value) (semantic-tag-p (car value)))
(semantic-tag-write-tag-list value (+ indent 2))
)
;; Some arbitrary data.
(t
(let ((str (format "%S" value)))
;; Protect against odd data types in tags.
(if (= (aref str 0) ?#)
(progn
(princ "nil")
(message "Warning: Value %s not writable in tag." str))
(princ str)))))
)
;;; EIEIO USAGE
;;;###autoload
(defun semantic-tag-write-list-slot-value (value)
"Write out the VALUE of a slot for EIEIO.
The VALUE is a list of tags."
(if (not value)
(princ "nil")
(princ "\n '")
(semantic-tag-write-tag-list value 10 t)
))
(provide 'semantic/tag-write)
;; Local variables:
;; generated-autoload-file: "loaddefs.el"
;; generated-autoload-load-name: "semantic/tag-write"
;; End:
;;; semantic/tag-write.el ends here
|
