mirror of
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cc2a16d94d
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30760 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
589 lines
19 KiB
Ruby
589 lines
19 KiB
Ruby
require 'rdoc'
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##
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# RDoc::Markup parses plain text documents and attempts to decompose them into
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# their constituent parts. Some of these parts are high-level: paragraphs,
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# chunks of verbatim text, list entries and the like. Other parts happen at
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# the character level: a piece of bold text, a word in code font. This markup
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# is similar in spirit to that used on WikiWiki webs, where folks create web
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# pages using a simple set of formatting rules.
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#
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# RDoc::Markup itself does no output formatting: this is left to a different
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# set of classes.
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#
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# RDoc::Markup is extendable at runtime: you can add \new markup elements to
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# be recognised in the documents that RDoc::Markup parses.
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#
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# RDoc::Markup is intended to be the basis for a family of tools which share
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# the common requirement that simple, plain-text should be rendered in a
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# variety of different output formats and media. It is envisaged that
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# RDoc::Markup could be the basis for formatting RDoc style comment blocks,
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# Wiki entries, and online FAQs.
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#
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# == Synopsis
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#
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# This code converts +input_string+ to HTML. The conversion takes place in
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# the +convert+ method, so you can use the same RDoc::Markup converter to
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# convert multiple input strings.
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#
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# require 'rdoc/markup/to_html'
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#
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# h = RDoc::Markup::ToHtml.new
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#
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# puts h.convert(input_string)
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#
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# You can extend the RDoc::Markup parser to recognise new markup
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# sequences, and to add special processing for text that matches a
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# regular expression. Here we make WikiWords significant to the parser,
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# and also make the sequences {word} and \<no>text...</no> signify
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# strike-through text. When then subclass the HTML output class to deal
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# with these:
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#
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# require 'rdoc/markup'
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# require 'rdoc/markup/to_html'
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#
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# class WikiHtml < RDoc::Markup::ToHtml
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# def handle_special_WIKIWORD(special)
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# "<font color=red>" + special.text + "</font>"
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# end
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# end
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#
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# m = RDoc::Markup.new
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# m.add_word_pair("{", "}", :STRIKE)
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# m.add_html("no", :STRIKE)
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#
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# m.add_special(/\b([A-Z][a-z]+[A-Z]\w+)/, :WIKIWORD)
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#
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# wh = WikiHtml.new
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# wh.add_tag(:STRIKE, "<strike>", "</strike>")
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#
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# puts "<body>#{wh.convert ARGF.read}</body>"
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#
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# == Encoding
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#
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# Where Encoding support is available RDoc will automatically convert all
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# documents to the same output encoding. The output encoding can be set via
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# RDoc::Options#encoding and defaults to Encoding.default_external.
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#
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# = \RDoc Markup Reference
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#
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# == Block Markup
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#
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# === Paragraphs and Verbatim
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#
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# The markup engine looks for a document's natural left margin. This is
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# used as the initial margin for the document.
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#
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# Consecutive lines starting at this margin are considered to be a
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# paragraph. Empty lines separate paragraphs.
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#
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# Any line that starts to the right of the current margin is treated
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# as verbatim text. This is useful for code listings:
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#
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# 3.times { puts "Ruby" }
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#
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# In verbatim text, two or more blank lines are collapsed into one,
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# and trailing blank lines are removed:
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#
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# This is the first line
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#
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#
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# This is the second non-blank line,
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# after 2 blank lines in the source markup.
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#
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#
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# There were two trailing blank lines right above this paragraph, that
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# have been removed. In addition, the verbatim text has been shifted
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# left, so the amount of indentation of verbatim text is unimportant.
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#
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# === Headers and Rules
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#
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# A line starting with an equal sign (=) is treated as a
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# heading. Level one headings have one equals sign, level two headings
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# have two, and so on until level six, which is the maximum
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# (seven hyphens or more result in a level six heading).
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#
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# For example, the above header was obtained with:
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# == Headers and Rules
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#
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# A line starting with three or more hyphens (at the current indent)
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# generates a horizontal rule. The more hyphens, the thicker the rule
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# (within reason, and if supported by the output device).
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#
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# In the case of HTML output, three dashes generate a 1-pixel high rule,
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# four dashes result in 2 pixels, and so on. The actual height is limited
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# to 10 pixels:
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#
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# ---
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# -----
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# -----------------------------------------------------
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#
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# produces:
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#
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# ---
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# -----
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# -----------------------------------------------------
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#
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# === Simple Lists
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#
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# If a paragraph starts with a "*", "-", "<digit>." or "<letter>.",
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# then it is taken to be the start of a list. The margin in increased to be
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# the first non-space following the list start flag. Subsequent lines
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# should be indented to this new margin until the list ends. For example:
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#
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# * this is a list with three paragraphs in
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# the first item. This is the first paragraph.
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#
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# And this is the second paragraph.
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#
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# 1. This is an indented, numbered list.
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# 2. This is the second item in that list
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#
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# This is the third conventional paragraph in the
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# first list item.
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#
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# * This is the second item in the original list
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#
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# produces:
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#
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# * this is a list with three paragraphs in
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# the first item. This is the first paragraph.
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#
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# And this is the second paragraph.
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#
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# 1. This is an indented, numbered list.
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# 2. This is the second item in that list
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#
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# This is the third conventional paragraph in the
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# first list item.
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#
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# * This is the second item in the original list
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#
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# === Labeled Lists
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#
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# You can also construct labeled lists, sometimes called description
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# or definition lists. Do this by putting the label in square brackets
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# and indenting the list body:
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#
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# [cat] a small furry mammal
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# that seems to sleep a lot
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#
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# [ant] a little insect that is known
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# to enjoy picnics
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#
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# produces:
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#
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# [cat] a small furry mammal
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# that seems to sleep a lot
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#
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# [ant] a little insect that is known
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# to enjoy picnics
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#
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# If you want the list bodies to line up to the left of the labels,
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# use two colons:
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#
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# cat:: a small furry mammal
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# that seems to sleep a lot
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#
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# ant:: a little insect that is known
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# to enjoy picnics
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#
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# produces:
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#
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# cat:: a small furry mammal
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# that seems to sleep a lot
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#
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# ant:: a little insect that is known
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# to enjoy picnics
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#
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# Notice that blank lines right after the label are ignored in labeled lists:
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#
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# [one]
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#
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# definition 1
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#
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# [two]
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#
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# definition 2
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#
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# produces the same output as
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#
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# [one] definition 1
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# [two] definition 2
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#
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#
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# === Lists and Verbatim
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#
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# If you want to introduce a verbatim section right after a list, it has to be
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# less indented than the list item bodies, but more indented than the list
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# label, letter, digit or bullet. For instance:
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#
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# * point 1
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#
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# * point 2, first paragraph
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#
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# point 2, second paragraph
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# verbatim text inside point 2
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# point 2, third paragraph
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# verbatim text outside of the list (the list is therefore closed)
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# regular paragraph after the list
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#
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# produces:
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#
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# * point 1
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#
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# * point 2, first paragraph
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#
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# point 2, second paragraph
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# verbatim text inside point 2
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# point 2, third paragraph
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# verbatim text outside of the list (the list is therefore closed)
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# regular paragraph after the list
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#
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#
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# == Text Markup
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#
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# === Bold, Italic, Typewriter Text
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#
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# You can use markup within text (except verbatim) to change the
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# appearance of parts of that text. Out of the box, RDoc::Markup
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# supports word-based and general markup.
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#
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# Word-based markup uses flag characters around individual words:
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#
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# <tt>\*_word_\*</tt>:: displays _word_ in a *bold* font
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# <tt>\__word_\_</tt>:: displays _word_ in an _emphasized_ font
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# <tt>\+_word_\+</tt>:: displays _word_ in a +code+ font
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#
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# General markup affects text between a start delimiter and an end
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# delimiter. Not surprisingly, these delimiters look like HTML markup.
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#
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# <tt>\<b>_text_</b></tt>:: displays _text_ in a *bold* font
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# <tt>\<em>_text_</em></tt>:: displays _text_ in an _emphasized_ font
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# (alternate tag: <tt>\<i></tt>)
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# <tt>\<tt>_text_\</tt></tt>:: displays _text_ in a +code+ font
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# (alternate tag: <tt>\<code></tt>)
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#
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# Unlike conventional Wiki markup, general markup can cross line
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# boundaries. You can turn off the interpretation of markup by
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# preceding the first character with a backslash (see <i>Escaping
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# Text Markup</i>, below).
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#
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# === Hyperlinks
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#
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# Hyperlinks to the web starting with +http:+, +mailto:+, +ftp:+ or +www.+
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# are recognized. An HTTP url that references an external image file is
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# converted into an inline <img...>. Hyperlinks starting with +link:+ are
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# assumed to refer to local files whose path is relative to the <tt>--op</tt>
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# directory.
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#
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# Hyperlinks can also be of the form _label_[_url_], in which
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# case _label_ is used in the displayed text, and _url_ is
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# used as the target. If _label_ contains multiple words,
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# put it in braces: {<em>multi word label</em>}[url].
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#
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# Example hyperlinks:
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#
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# link:RDoc.html
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# http://rdoc.rubyforge.org
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# mailto:user@example.com
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# {RDoc Documentation}[http://rdoc.rubyforge.org]
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# {RDoc Markup}[link:RDoc/Markup.html]
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#
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# === Escaping Text Markup
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#
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# Text markup can be escaped with a backslash, as in \<tt>, which was obtained
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# with "<tt>\\<tt></tt>". Except in verbatim sections and between \<tt> tags,
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# to produce a backslash, you have to double it unless it is followed by a
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# space, tab or newline. Otherwise, the HTML formatter will discard it, as it
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# is used to escape potential hyperlinks:
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#
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# * The \ must be doubled if not followed by white space: \\.
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# * But not in \<tt> tags: in a Regexp, <tt>\S</tt> matches non-space.
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# * This is a link to {ruby-lang}[www.ruby-lang.org].
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# * This is not a link, however: \{ruby-lang.org}[www.ruby-lang.org].
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# * This will not be hyperlinked to \RDoc::RDoc#document
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#
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# generates:
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#
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# * The \ must be doubled if not followed by white space: \\.
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# * But not in \<tt> tags: in a Regexp, <tt>\S</tt> matches non-space.
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# * This is a link to {ruby-lang}[www.ruby-lang.org]
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# * This is not a link, however: \{ruby-lang.org}[www.ruby-lang.org]
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# * This will not be hyperlinked to \RDoc::RDoc#document
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#
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# Inside \<tt> tags, more precisely, leading backslashes are removed
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# only if followed by a markup character (<tt><*_+</tt>), a backslash,
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# or a known hyperlink reference (a known class or method). So in the
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# example above, the backslash of <tt>\S</tt> would be removed
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# if there was a class or module named +S+ in the current context.
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#
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# This behavior is inherited from RDoc version 1, and has been kept
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# for compatibility with existing RDoc documentation.
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#
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# === Conversion of characters
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#
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# HTML will convert two/three dashes to an em-dash. Other common characters are
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# converted as well:
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#
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# em-dash:: -- or ---
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# ellipsis:: ...
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#
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# single quotes:: 'text' or `text'
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# double quotes:: "text" or ``text''
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#
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# copyright:: (c)
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# registered trademark:: (r)
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#
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# produces:
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#
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# em-dash:: -- or ---
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# ellipsis:: ...
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#
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# single quotes:: 'text' or `text'
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# double quotes:: "text" or ``text''
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#
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# copyright:: (c)
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# registered trademark:: (r)
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#
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#
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# == Documenting Source Code
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#
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# Comment blocks can be written fairly naturally, either using <tt>#</tt> on
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# successive lines of the comment, or by including the comment in
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# a <tt>=begin</tt>/<tt>=end</tt> block. If you use the latter form,
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# the <tt>=begin</tt> line _must_ be flagged with an +rdoc+ tag:
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#
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# =begin rdoc
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# Documentation to be processed by RDoc.
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#
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# ...
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# =end
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#
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# RDoc stops processing comments if it finds a comment line starting
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# with <tt>--</tt> right after the <tt>#</tt> character (otherwise,
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# it will be treated as a rule if it has three dashes or more).
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# This can be used to separate external from internal comments,
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# or to stop a comment being associated with a method, class, or module.
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# Commenting can be turned back on with a line that starts with <tt>++</tt>.
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#
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# ##
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# # Extract the age and calculate the date-of-birth.
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# #--
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# # FIXME: fails if the birthday falls on February 29th
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# #++
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# # The DOB is returned as a Time object.
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#
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# def get_dob(person)
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# # ...
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# end
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#
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# Names of classes, files, and any method names containing an
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# underscore or preceded by a hash character are automatically hyperlinked
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# from comment text to their description. This hyperlinking works inside
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# the current class or module, and with ancestor methods (in included modules
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# or in the superclass).
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#
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# Method parameter lists are extracted and displayed with the method
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# description. If a method calls +yield+, then the parameters passed to yield
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# will also be displayed:
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#
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# def fred
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# ...
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# yield line, address
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#
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# This will get documented as:
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#
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# fred() { |line, address| ... }
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#
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# You can override this using a comment containing ':yields: ...' immediately
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# after the method definition
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#
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# def fred # :yields: index, position
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# # ...
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#
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# yield line, address
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#
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# which will get documented as
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#
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# fred() { |index, position| ... }
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#
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# +:yields:+ is an example of a documentation directive. These appear
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# immediately after the start of the document element they are modifying.
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#
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# RDoc automatically cross-references words with underscores or camel-case.
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# To suppress cross-references, prefix the word with a \ character. To
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# include special characters like "<tt>\n</tt>", you'll need to use
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# two \ characters in normal text, but only one in \<tt> text:
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#
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# "\\n" or "<tt>\n</tt>"
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#
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# produces:
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#
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# "\\n" or "<tt>\n</tt>"
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#
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# == Directives
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#
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# Directives are keywords surrounded by ":" characters.
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#
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# === Controlling what is documented
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#
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# [+:nodoc:+ / <tt>:nodoc: all</tt>]
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# This directive prevents documentation for the element from
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# being generated. For classes and modules, the methods, aliases,
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# constants, and attributes directly within the affected class or
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# module also will be omitted. By default, though, modules and
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# classes within that class of module _will_ be documented. This is
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# turned off by adding the +all+ modifier.
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#
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# module MyModule # :nodoc:
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# class Input
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# end
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# end
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#
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# module OtherModule # :nodoc: all
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# class Output
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# end
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# end
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#
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# In the above code, only class <tt>MyModule::Input</tt> will be documented.
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#
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# The +:nodoc:+ directive, like +:enddoc:+, +:stopdoc:+ and +:startdoc:+
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# presented below, is local to the current file: if you do not want to
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# document a module that appears in several files, specify +:nodoc:+ on each
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# appearance, at least once per file.
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#
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# [+:stopdoc:+ / +:startdoc:+]
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# Stop and start adding new documentation elements to the current container.
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# For example, if a class has a number of constants that you don't want to
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# document, put a +:stopdoc:+ before the first, and a +:startdoc:+ after the
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# last. If you don't specify a +:startdoc:+ by the end of the container,
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# disables documentation for the rest of the current file.
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#
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# [+:doc:+]
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# Forces a method or attribute to be documented even if it wouldn't be
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# otherwise. Useful if, for example, you want to include documentation of a
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# particular private method.
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#
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# [+:enddoc:+]
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# Document nothing further at the current level: directives +:startdoc:+ and
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# +:doc:+ that appear after this will not be honored for the current container
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# (file, class or module), in the current file.
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#
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# [+:notnew:+ / +:not_new:+ / +:not-new:+ ]
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# Only applicable to the +initialize+ instance method. Normally RDoc
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# assumes that the documentation and parameters for +initialize+ are
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# actually for the +new+ method, and so fakes out a +new+ for the class.
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# The +:notnew:+ directive stops this. Remember that +initialize+ is private,
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# so you won't see the documentation unless you use the +-a+ command line
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# option.
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#
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# === Other directives
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#
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# [+:include:+ _filename_]
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# Include the contents of the named file at this point. This directive
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# must appear alone on one line, possibly preceded by spaces. In this
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# position, it can be escaped with a \ in front of the first colon.
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#
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# The file will be searched for in the directories listed by the +--include+
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# option, or in the current directory by default. The contents of the file
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# will be shifted to have the same indentation as the ':' at the start of
|
|
# the +:include:+ directive.
|
|
#
|
|
# [+:title:+ _text_]
|
|
# Sets the title for the document. Equivalent to the <tt>--title</tt>
|
|
# command line parameter. (The command line parameter overrides any :title:
|
|
# directive in the source).
|
|
#
|
|
# [+:main:+ _name_]
|
|
# Equivalent to the <tt>--main</tt> command line parameter.
|
|
#
|
|
# [<tt>:section: title</tt>]
|
|
# Starts a new section in the output. The title following +:section:+ is
|
|
# used as the section heading, and the remainder of the comment containing
|
|
# the section is used as introductory text. Subsequent methods, aliases,
|
|
# attributes, and classes will be documented in this section. A :section:
|
|
# comment block may have one or more lines before the :section: directive.
|
|
# These will be removed, and any identical lines at the end of the block are
|
|
# also removed. This allows you to add visual cues such as:
|
|
#
|
|
# # ----------------------------------------
|
|
# # :section: My Section
|
|
# # This is the section that I wrote.
|
|
# # See it glisten in the noon-day sun.
|
|
# # ----------------------------------------
|
|
#
|
|
# <i>Note: Current formatters to not take sections into account.</i>
|
|
#
|
|
# [+:call-seq:+]
|
|
# Lines up to the next blank line in the comment are treated as the method's
|
|
# calling sequence, overriding the default parsing of method parameters and
|
|
# yield arguments.
|
|
#
|
|
# Further directives can be found in RDoc::Parser::Ruby and RDoc::Parser::C.
|
|
#--
|
|
# Original Author:: Dave Thomas, dave@pragmaticprogrammer.com
|
|
# License:: Ruby license
|
|
|
|
class RDoc::Markup
|
|
|
|
##
|
|
# An AttributeManager which handles inline markup.
|
|
|
|
attr_reader :attribute_manager
|
|
|
|
##
|
|
# Take a block of text and use various heuristics to determine it's
|
|
# structure (paragraphs, lists, and so on). Invoke an event handler as we
|
|
# identify significant chunks.
|
|
|
|
def initialize attribute_manager = nil
|
|
@attribute_manager = attribute_manager || RDoc::Markup::AttributeManager.new
|
|
@output = nil
|
|
end
|
|
|
|
##
|
|
# Add to the sequences used to add formatting to an individual word (such
|
|
# as *bold*). Matching entries will generate attributes that the output
|
|
# formatters can recognize by their +name+.
|
|
|
|
def add_word_pair(start, stop, name)
|
|
@attribute_manager.add_word_pair(start, stop, name)
|
|
end
|
|
|
|
##
|
|
# Add to the sequences recognized as general markup.
|
|
|
|
def add_html(tag, name)
|
|
@attribute_manager.add_html(tag, name)
|
|
end
|
|
|
|
##
|
|
# Add to other inline sequences. For example, we could add WikiWords using
|
|
# something like:
|
|
#
|
|
# parser.add_special(/\b([A-Z][a-z]+[A-Z]\w+)/, :WIKIWORD)
|
|
#
|
|
# Each wiki word will be presented to the output formatter via the
|
|
# accept_special method.
|
|
|
|
def add_special(pattern, name)
|
|
@attribute_manager.add_special(pattern, name)
|
|
end
|
|
|
|
##
|
|
# We take +text+, parse it then invoke the output +formatter+ using a
|
|
# Visitor to render the result.
|
|
|
|
def convert text, formatter
|
|
document = RDoc::Markup::Parser.parse text
|
|
|
|
document.accept formatter
|
|
end
|
|
|
|
end
|
|
|
|
require 'rdoc/markup/parser'
|
|
require 'rdoc/markup/attribute_manager'
|
|
require 'rdoc/markup/inline'
|
|
|