зеркало из https://github.com/mozilla/pjs.git
547 строки
24 KiB
Common Lisp
547 строки
24 KiB
Common Lisp
;;; The contents of this file are subject to the Netscape Public License
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;;; Version 1.0 (the "NPL"); you may not use this file except in
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;;; compliance with the NPL. You may obtain a copy of the NPL at
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;;; http://www.mozilla.org/NPL/
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;;;
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;;; Software distributed under the NPL is distributed on an "AS IS" basis,
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;;; WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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;;; for the specific language governing rights and limitations under the
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;;; NPL.
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;;;
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;;; The Initial Developer of this code under the NPL is Netscape
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;;; Communications Corporation. Portions created by Netscape are
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;;; Copyright (C) 1999 Netscape Communications Corporation. All Rights
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;;; Reserved.
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;;;
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;;; HTML output generator
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;;;
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;;; Waldemar Horwat (waldemar@netscape.com)
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;;;
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;;; ------------------------------------------------------------------------------------------------------
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;;; ELEMENTS
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(defstruct (html-element (:constructor make-html-element (name self-closing indent
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newlines-before newlines-begin newlines-end newlines-after))
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(:predicate html-element?))
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(name nil :type symbol :read-only t) ;Name of the tag
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(self-closing nil :type bool :read-only t) ;True if the closing tag should be omitted
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(indent nil :type integer :read-only t) ;Number of spaces by which to indent this tag's contents in HTML source
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(newlines-before nil :type integer :read-only t) ;Number of HTML source newlines preceding the opening tag
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(newlines-begin nil :type integer :read-only t) ;Number of HTML source newlines immediately following the opening tag
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(newlines-end nil :type integer :read-only t) ;Number of HTML source newlines immediately preceding the closing tag
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(newlines-after nil :type integer :read-only t)) ;Number of HTML source newlines following the closing tag
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; Define symbol to refer to the given html-element.
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(defun define-html (symbol newlines-before newlines-begin newlines-end newlines-after &key self-closing (indent 0))
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(setf (get symbol 'html-element) (make-html-element symbol self-closing indent
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newlines-before newlines-begin newlines-end newlines-after)))
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;;; ------------------------------------------------------------------------------------------------------
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;;; ELEMENT DEFINITIONS
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(define-html 'a 0 0 0 0)
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(define-html 'b 0 0 0 0)
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(define-html 'blockquote 1 0 0 1 :indent 2)
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(define-html 'body 1 1 1 1)
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(define-html 'br 0 0 0 1 :self-closing t)
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(define-html 'code 0 0 0 0)
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(define-html 'dd 1 0 0 1 :indent 2)
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(define-html 'del 0 0 0 0)
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(define-html 'div 1 0 0 1 :indent 2)
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(define-html 'dl 1 0 0 2 :indent 2)
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(define-html 'dt 1 0 0 1 :indent 2)
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(define-html 'em 0 0 0 0)
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(define-html 'h1 2 0 0 2 :indent 2)
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(define-html 'h2 2 0 0 2 :indent 2)
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(define-html 'h3 2 0 0 2 :indent 2)
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(define-html 'h4 1 0 0 2 :indent 2)
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(define-html 'h5 1 0 0 2 :indent 2)
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(define-html 'h6 1 0 0 2 :indent 2)
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(define-html 'head 1 1 1 2)
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(define-html 'hr 1 0 0 1 :self-closing t)
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(define-html 'html 0 1 1 1)
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(define-html 'i 0 0 0 0)
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(define-html 'li 1 0 0 1 :indent 2)
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(define-html 'link 1 0 0 1 :self-closing t)
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(define-html 'ol 1 1 1 2 :indent 2)
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(define-html 'p 1 0 0 2)
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(define-html 'script 0 0 0 0)
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(define-html 'span 0 0 0 0)
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(define-html 'strong 0 0 0 0)
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(define-html 'sub 0 0 0 0)
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(define-html 'sup 0 0 0 0)
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(define-html 'table 1 1 1 2)
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(define-html 'td 1 0 0 1 :indent 2)
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(define-html 'th 1 0 0 1 :indent 2)
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(define-html 'title 1 0 0 1)
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(define-html 'tr 1 0 0 1 :indent 2)
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(define-html 'u 0 0 0 0)
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(define-html 'ul 1 1 1 2 :indent 2)
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(define-html 'var 0 0 0 0)
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;;; ------------------------------------------------------------------------------------------------------
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;;; ENTITIES
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(defvar *html-entities-list*
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'((#\& . "amp")
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(#\" . "quot")
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(#\< . "lt")
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(#\> . "gt")
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(nbsp . "nbsp")))
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(defvar *html-entities-hash* (make-hash-table))
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(dolist (entity-binding *html-entities-list*)
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(setf (gethash (first entity-binding) *html-entities-hash*) (rest entity-binding)))
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; Return a freshly consed list of <html-source> that represent the characters in the string except that
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; '&', '<', and '>' are replaced by their entities and spaces are replaced by the entity
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; given by the space parameter (which should be either 'space or 'nbsp).
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(defun escape-html-characters (string space)
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(let ((html-sources nil))
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(labels
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((escape-remainder (start)
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(let ((i (position-if #'(lambda (char) (member char '(#\& #\< #\> #\space))) string :start start)))
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(if i
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(let ((char (char string i)))
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(unless (= i start)
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(push (subseq string start i) html-sources))
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(push (if (eql char #\space) space char) html-sources)
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(escape-remainder (1+ i)))
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(push (if (zerop start) string (subseq string start)) html-sources)))))
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(unless (zerop (length string))
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(escape-remainder 0))
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(nreverse html-sources))))
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; Escape all content strings in the html-source, while interpreting :nowrap pseudo-tags.
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; Return a freshly consed list of html-sources.
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(defun escape-html-source (html-source space)
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(cond
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((stringp html-source)
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(escape-html-characters html-source space))
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((or (characterp html-source) (symbolp html-source) (integerp html-source))
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(list html-source))
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((consp html-source)
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(let ((tag (first html-source))
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(contents (rest html-source)))
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(if (eq tag ':nowrap)
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(mapcan #'(lambda (html-source) (escape-html-source html-source 'nbsp)) contents)
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(list (cons tag
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(mapcan #'(lambda (html-source) (escape-html-source html-source space)) contents))))))
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(t (error "Bad html-source: ~S" html-source))))
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; Escape all content strings in the html-source, while interpreting :nowrap pseudo-tags.
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(defun escape-html (html-source)
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(let ((results (escape-html-source html-source 'space)))
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(assert-true (= (length results) 1))
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(first results)))
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;;; ------------------------------------------------------------------------------------------------------
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;;; HTML WRITER
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;; <html-source> has one of the following formats:
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;; <string> ;String to be printed literally
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;; <symbol> ;Named entity
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;; <integer> ;Numbered entity
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;; space ;Space or newline
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;; (<tag> <html-source> ... <html-source>) ;Tag and its contents
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;; ((:nest <tag> ... <tag>) <html-source> ... <html-source>) ;Equivalent to (<tag> (... (<tag> <html-source> ... <html-source>)))
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;;
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;; <tag> has one of the following formats:
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;; <symbol> ;Tag with no attributes
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;; (<symbol> <attribute> ... <attribute>) ;Tag with attributes
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;; :nowrap ;Pseudo-tag indicating that spaces in contents should be non-breaking
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;;
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;; <attribute> has one of the following formats:
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;; (<symbol> <string>) ;Attribute name and value
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;; (<symbol>) ;Attribute name with omitted value
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(defparameter *html-right-margin* 100)
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(defparameter *allow-line-breaks-in-tags* nil) ;Allow line breaks in tags between attributes?
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(defvar *current-html-pos*) ;Number of characters written to the current line of the stream; nil if *current-html-newlines* is nonzero
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(defvar *current-html-pending*) ;String following a space or newline pending to be printed on the current line or nil if none
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(defvar *current-html-indent*) ;Indent to use for emit-html-newlines-and-indent calls
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(defvar *current-html-newlines*) ;Number of consecutive newlines just written to the stream; zero if last character wasn't a newline
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; Flush *current-html-pending* onto the stream.
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(defun flush-current-html-pending (stream)
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(when *current-html-pending*
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(unless (zerop (length *current-html-pending*))
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(write-char #\space stream)
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(write-string *current-html-pending* stream)
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(incf *current-html-pos* (1+ (length *current-html-pending*))))
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(setq *current-html-pending* nil)))
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; Emit n-newlines onto the stream and indent the next line by *current-html-indent* spaces.
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(defun emit-html-newlines-and-indent (stream n-newlines)
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(decf n-newlines *current-html-newlines*)
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(when (plusp n-newlines)
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(flush-current-html-pending stream)
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(dotimes (i n-newlines)
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(write-char #\newline stream))
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(incf *current-html-newlines* n-newlines)
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(setq *current-html-pos* nil)))
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; Write the string to the stream, observing *current-html-pending* and *current-html-pos*.
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(defun write-html-string (stream html-string)
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(unless (zerop (length html-string))
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(unless *current-html-pos*
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(setq *current-html-newlines* 0)
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(write-string (make-string *current-html-indent* :initial-element #\space) stream)
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(setq *current-html-pos* *current-html-indent*))
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(if *current-html-pending*
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(progn
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(setq *current-html-pending* (if (zerop (length *current-html-pending*))
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html-string
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(concatenate 'string *current-html-pending* html-string)))
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(when (>= (+ *current-html-pos* (length *current-html-pending*)) *html-right-margin*)
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(write-char #\newline stream)
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(write-string *current-html-pending* stream)
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(setq *current-html-pos* (length *current-html-pending*))
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(setq *current-html-pending* nil)))
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(progn
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(write-string html-string stream)
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(incf *current-html-pos* (length html-string))))))
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; Return true if the value string contains a character that would require an attribute to be quoted.
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; For convenience, this returns true if value contains a period, even though strictly speaking periods do
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; not force quoting.
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(defun attribute-value-needs-quotes (value)
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(dotimes (i (length value) nil)
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(let ((ch (char value i)))
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(unless (or (char<= #\0 ch #\9) (char<= #\A ch #\Z) (char<= #\a ch #\z) (char= ch #\-))
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(return t)))))
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; Emit the html tag with the given tag-symbol (name), attributes, and contents.
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(defun write-html-tag (stream tag-symbol attributes contents)
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(let ((element (assert-non-null (get tag-symbol 'html-element))))
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(emit-html-newlines-and-indent stream (html-element-newlines-before element))
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(write-html-string stream (format nil "<~A" (html-element-name element)))
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(let ((*current-html-indent* (+ *current-html-indent* (html-element-indent element))))
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(dolist (attribute attributes)
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(let ((name (first attribute))
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(value (second attribute)))
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(write-html-source stream (if *allow-line-breaks-in-tags* 'space #\space))
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(write-html-string stream (string-downcase (symbol-name name)))
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(when value
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(write-html-string stream (format nil (if (attribute-value-needs-quotes value) "=\"~A\"" "=~A") value)))))
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(write-html-string stream ">")
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(emit-html-newlines-and-indent stream (html-element-newlines-begin element))
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(dolist (html-source contents)
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(write-html-source stream html-source)))
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(unless (html-element-self-closing element)
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(emit-html-newlines-and-indent stream (html-element-newlines-end element))
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(write-html-string stream (format nil "</~A>" (html-element-name element))))
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(emit-html-newlines-and-indent stream (html-element-newlines-after element))))
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; Write html-source to the character stream.
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(defun write-html-source (stream html-source)
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(cond
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((stringp html-source)
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(write-html-string stream html-source))
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((eq html-source 'space)
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(when (zerop *current-html-newlines*)
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(flush-current-html-pending stream)
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(setq *current-html-pending* "")))
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((or (characterp html-source) (symbolp html-source))
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(let ((entity-name (gethash html-source *html-entities-hash*)))
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(cond
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(entity-name
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(write-html-string stream (format nil "&~A;" entity-name)))
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((characterp html-source)
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(write-html-string stream (string html-source)))
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(t (error "Bad html-source ~S" html-source)))))
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((integerp html-source)
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(assert-true (and (>= html-source 0) (< html-source 65536)))
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(write-html-string stream (format nil "&#~D;" html-source)))
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((consp html-source)
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(let ((tag (first html-source))
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(contents (rest html-source)))
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(if (consp tag)
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(write-html-tag stream (first tag) (rest tag) contents)
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(write-html-tag stream tag nil contents))))
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(t (error "Bad html-source: ~S" html-source))))
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; Write the top-level html-source to the character stream.
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(defun write-html (html-source &optional (stream t))
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(with-standard-io-syntax
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(let ((*print-readably* nil)
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(*print-escape* nil)
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(*print-case* :upcase)
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(*current-html-pos* nil)
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(*current-html-pending* nil)
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(*current-html-indent* 0)
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(*current-html-newlines* 9999))
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(write-string "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" \"http://www.w3.org/TR/REC-html40/loose.dtd\">" stream)
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(write-char #\newline stream)
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(write-html-source stream (escape-html html-source)))))
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; Write html to the text file with the given name (relative to the
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; local directory).
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(defun write-html-to-local-file (filename html)
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(with-open-file (stream (merge-pathnames filename *semantic-engine-directory*)
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:direction :output
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:if-exists :supersede
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#+mcl :mac-file-creator #+mcl "MOSS")
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(write-html html stream)))
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; Expand the :nest constructs inside html-source.
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(defun unnest-html-source (html-source)
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(labels
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((unnest-tags (tags contents)
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(assert-true tags)
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(cons (first tags)
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(if (endp (rest tags))
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contents
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(list (unnest-tags (rest tags) contents))))))
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(if (consp html-source)
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(let ((tag (first html-source))
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(contents (rest html-source)))
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(if (and (consp tag) (eq (first tag) ':nest))
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(unnest-html-source (unnest-tags (rest tag) contents))
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(cons tag (mapcar #'unnest-html-source contents))))
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html-source)))
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;;; ------------------------------------------------------------------------------------------------------
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;;; HTML MAPPINGS
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(defparameter *html-definitions*
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'(((:new-line t) (br))
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;Misc.
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(:spc nbsp)
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(:tab2 nbsp nbsp)
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(:tab3 nbsp nbsp nbsp)
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;Symbols (-10 suffix means 10-point, etc.)
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((:bullet 1) (:script "document.write(U_bull)")) ;#x2022
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((:minus 1) "-")
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((:not-equal 1) (:script "document.write(U_ne)")) ;#x2260
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((:less-or-equal 1) (:script "document.write(U_le)")) ;#x2264
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((:greater-or-equal 1) (:script "document.write(U_ge)")) ;#x2265
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((:infinity 1) (:script "document.write(U_infin)")) ;#x221E
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((:left-single-quote 1) #x2018)
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((:right-single-quote 1) #x2019)
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((:left-double-quote 1) #x201C)
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((:right-double-quote 1) #x201D)
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((:left-angle-quote 1) #x00AB)
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((:right-angle-quote 1) #x00BB)
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((:bottom-10 1) (:script "document.write(U_perp)")) ;#x22A5
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((:up-arrow-10 1) (:script "document.write(U_uarr)")) ;#x2191
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((:function-arrow-10 2) (:script "document.write(U_rarr)")) ;#x2192
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((:cartesian-product-10 2) (:script "document.write(U_times)")) ;#x00D7
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((:identical-10 2) (:script "document.write(U_equiv)")) ;#x2261
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((:member-10 2) (:script "document.write(U_isin)")) ;#x2208
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((:derives-10 2) (:script "document.write(U_rArr)")) ;#x21D2
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((:left-triangle-bracket-10 1) (:script "document.write(U_lang)")) ;#x2329
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((:right-triangle-bracket-10 1) (:script "document.write(U_rang)")) ;#x232A
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((:big-plus-10 2) (:script "document.write(U_oplus)")) ;#x2295
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((:alpha 1) (:symbol "a"))
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((:beta 1) (:symbol "b"))
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((:chi 1) (:symbol "c"))
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((:delta 1) (:symbol "d"))
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((:epsilon 1) (:symbol "e"))
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((:phi 1) (:symbol "f"))
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((:gamma 1) (:symbol "g"))
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((:eta 1) (:symbol "h"))
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((:iota 1) (:symbol "i"))
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((:kappa 1) (:symbol "k"))
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((:lambda 1) (:symbol "l"))
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((:mu 1) (:symbol "m"))
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((:nu 1) (:symbol "n"))
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((:omicron 1) (:symbol "o"))
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((:pi 1) (:symbol "p"))
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((:theta 1) (:symbol "q"))
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((:rho 1) (:symbol "r"))
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((:sigma 1) (:symbol "s"))
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((:tau 1) (:symbol "t"))
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((:upsilon 1) (:symbol "u"))
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((:omega 1) (:symbol "w"))
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((:xi 1) (:symbol "x"))
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((:psi 1) (:symbol "y"))
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((:zeta 1) (:symbol "z"))
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;Block Styles
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(:body-text p)
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(:section-heading h2)
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(:subsection-heading h3)
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(:grammar-header h4)
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(:grammar-rule (:nest :nowrap (div (class "grammar-rule"))))
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(:grammar-lhs (:nest :nowrap (div (class "grammar-lhs"))))
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(:grammar-lhs-last :grammar-lhs)
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(:grammar-rhs (:nest :nowrap (div (class "grammar-rhs"))))
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(:grammar-rhs-last :grammar-rhs)
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(:grammar-argument (:nest :nowrap (div (class "grammar-argument"))))
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(:semantics (:nest :nowrap (p (class "semantics"))))
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(:semantics-next (:nest :nowrap (p (class "semantics-next"))))
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;Inline Styles
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(:script (script (type "text/javascript")))
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(:symbol (span (class "symbol")))
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(:character-literal code)
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(:character-literal-control (span (class "control")))
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(:terminal (span (class "terminal")))
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(:terminal-keyword (code (class "terminal-keyword")))
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(:nonterminal (var (class "nonterminal")))
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(:nonterminal-attribute (span (class "nonterminal-attribute")))
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(:nonterminal-argument (span (class "nonterminal-argument")))
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(:semantic-keyword (span (class "semantic-keyword")))
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(:type-expression (span (class "type-expression")))
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(:type-name (span (class "type-name")))
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(:field-name (span (class "field-name")))
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(:global-variable (span (class "global-variable")))
|
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(:local-variable (span (class "local-variable")))
|
|
(:action-name (span (class "action-name")))
|
|
|
|
;Specials
|
|
(:invisible del)
|
|
((:but-not 6) (b "except"))
|
|
(:subscript sub)
|
|
(:superscript sup)
|
|
(:plain-subscript :subscript)
|
|
((:action-begin 1) "[")
|
|
((:action-end 1) "]")
|
|
((:vector-begin 1) (b "["))
|
|
((:vector-end 1) (b "]"))
|
|
((:empty-vector 2) (b "[]"))
|
|
((:vector-append 2) :big-plus-10)
|
|
((:tuple-begin 1) (b :left-triangle-bracket-10))
|
|
((:tuple-end 1) (b :right-triangle-bracket-10))
|
|
((:unit 4) (:global-variable "unit"))
|
|
((:true 4) (:global-variable "true"))
|
|
((:false 5) (:global-variable "false"))
|
|
))
|
|
|
|
|
|
;;; ------------------------------------------------------------------------------------------------------
|
|
;;; HTML STREAMS
|
|
|
|
(defstruct (html-stream (:include markup-stream)
|
|
(:constructor allocate-html-stream (env head tail level logical-position))
|
|
(:copier nil)
|
|
(:predicate html-stream?)))
|
|
|
|
|
|
(defmethod print-object ((html-stream html-stream) stream)
|
|
(print-unreadable-object (html-stream stream :identity t)
|
|
(write-string "html-stream" stream)))
|
|
|
|
|
|
; Make a new, empty, open html-stream with the given definitions for its markup-env.
|
|
(defun make-html-stream (markup-env level &optional logical-position)
|
|
(let ((head (list nil)))
|
|
(allocate-html-stream markup-env head head level logical-position)))
|
|
|
|
|
|
; Make a new, empty, open, top-level html-stream with the given definitions
|
|
; for its markup-env.
|
|
(defun make-top-level-html-stream (html-definitions)
|
|
(let ((head (list nil))
|
|
(markup-env (make-markup-env)))
|
|
(markup-env-define-alist markup-env html-definitions)
|
|
(allocate-html-stream markup-env head head *markup-stream-top-level* nil)))
|
|
|
|
|
|
; Return the approximate width of the html item; return t if it is a line break.
|
|
; Also allow html tags as long as they do not contain line breaks.
|
|
(defmethod markup-group-width ((html-stream html-stream) item)
|
|
(if (consp item)
|
|
(reduce #'+ (rest item) :key #'(lambda (subitem) (markup-group-width html-stream subitem)))
|
|
(markup-width html-stream item)))
|
|
|
|
|
|
; Create a top-level html-stream and call emitter to emit its contents.
|
|
; emitter takes one argument -- an html-stream to which it should emit paragraphs.
|
|
; Return the top-level html-stream.
|
|
(defun depict-html-top-level (emitter title)
|
|
(let ((html-stream (make-top-level-html-stream *html-definitions*)))
|
|
(markup-stream-append1 html-stream 'html)
|
|
(depict-block-style (html-stream 'head)
|
|
(depict-block-style (html-stream 'title)
|
|
(markup-stream-append1 html-stream title))
|
|
(markup-stream-append1 html-stream '((link (rel "stylesheet") (href "styles.css"))))
|
|
(markup-stream-append1 html-stream '((script (type "text/javascript") (language "JavaScript1.2") (src "unicodeCompatibility.js")))))
|
|
(depict-block-style (html-stream 'body)
|
|
(funcall emitter html-stream))
|
|
html-stream))
|
|
|
|
|
|
; Create a top-level html-stream and call emitter to emit its contents.
|
|
; emitter takes one argument -- an html-stream to which it should emit paragraphs.
|
|
; Write the resulting html to the text file with the given name (relative to the
|
|
; local directory).
|
|
(defun depict-html-to-local-file (filename emitter title)
|
|
(let ((top-html-stream (depict-html-top-level emitter title)))
|
|
(write-html-to-local-file filename (markup-stream-output top-html-stream))))
|
|
|
|
|
|
; Return the markup accumulated in the markup-stream after expanding all of its macros.
|
|
; The markup-stream is closed after this function is called.
|
|
(defmethod markup-stream-output ((html-stream html-stream))
|
|
(unnest-html-source
|
|
(markup-env-expand (markup-stream-env html-stream) (markup-stream-unexpanded-output html-stream) '(:nowrap :nest))))
|
|
|
|
|
|
|
|
(defmethod depict-block-style-f ((html-stream html-stream) block-style emitter)
|
|
(assert-true (<= (markup-stream-level html-stream) *markup-stream-paragraph-level*))
|
|
(assert-true (and block-style (symbolp block-style)))
|
|
(let ((inner-html-stream (make-html-stream (markup-stream-env html-stream) *markup-stream-paragraph-level* nil)))
|
|
(markup-stream-append1 inner-html-stream block-style)
|
|
(prog1
|
|
(funcall emitter inner-html-stream)
|
|
(markup-stream-append1 html-stream (markup-stream-unexpanded-output inner-html-stream)))))
|
|
|
|
|
|
(defmethod depict-paragraph-f ((html-stream html-stream) paragraph-style emitter)
|
|
(assert-true (= (markup-stream-level html-stream) *markup-stream-paragraph-level*))
|
|
(assert-true (and paragraph-style (symbolp paragraph-style)))
|
|
(let ((inner-html-stream (make-html-stream (markup-stream-env html-stream) *markup-stream-content-level* (make-logical-position))))
|
|
(markup-stream-append1 inner-html-stream paragraph-style)
|
|
(prog1
|
|
(funcall emitter inner-html-stream)
|
|
(markup-stream-append1 html-stream (markup-stream-unexpanded-output inner-html-stream)))))
|
|
|
|
|
|
(defmethod depict-char-style-f ((html-stream html-stream) char-style emitter)
|
|
(assert-true (>= (markup-stream-level html-stream) *markup-stream-content-level*))
|
|
(assert-true (and char-style (symbolp char-style)))
|
|
(let ((inner-html-stream (make-html-stream (markup-stream-env html-stream) *markup-stream-content-level* (markup-stream-logical-position html-stream))))
|
|
(markup-stream-append1 inner-html-stream char-style)
|
|
(prog1
|
|
(funcall emitter inner-html-stream)
|
|
(markup-stream-append1 html-stream (markup-stream-unexpanded-output inner-html-stream)))))
|
|
|
|
|
|
#|
|
|
(write-html
|
|
'(html
|
|
(head
|
|
(:nowrap (title "This is my title!<>")))
|
|
((body (atr1 "abc") (beta) (qq))
|
|
"My page this is " (br) (p))))
|
|
|#
|